SCROLL COMPRESSOR AND METHOD FOR ASSEMBLING SCROLL COMPRESSOR

Abstract

 The present application relates to a scroll compressor and a method for assembling a scroll compressor. The scroll compressor uses a split balance block to meet different balance block requirements by means of changing the weight and/or shape of a movable block. In addition, during assembly, the movable block is placed into an accommodation cavity via a thrust-surface through hole or a radial through hole, the movable block is then pushed to move radially to a preset position relative to a fixed block, and finally the movable block is fixedly connected onto the fixed block. By means of such arrangement, the balance block can be mounted in a frame to maintain a better balancing effect, can also break away from the factor whereby the size of the thrust-surface through hole limits the overall outer diameter of the balance block, and a balance block with an appropriate outer diameter can be selected according to actual requirements, such that the whole scroll compressor is reliable, low-cost and has a good balancing effect.

Description

[0001] The present disclosure claims priority to Chinese Patent Application No. 202211363791.5, titled "SCROLL COMPRESSOR AND METHOD FOR ASSEMBLING SCROLL COMPRESSOR", filed on November 2, 2022 with the National Intellectual Property Administration, PRC, which is incorporated herein by reference in its entirety.

FIELD

[0002] The present disclosure relates to the technical field of compressors, and in particular to a scroll compressor and a method for assembling a scroll compressor.

BACKGROUND

[0003] As a typical structure of compressors, the scroll compressor is mainly used in air conditioning, refrigeration, general gas compression, as well as in conditions such as automotive engine superchargers and vacuum pumps. The scroll compressor can replace a large range of conventional small and medium-sized reciprocating compressors.

[0004] The scroll compressor typically includes a compression mechanism consist of a fix scroll member and an orbiting scroll member. The orbiting scroll member is supported by a main bearing seat/thrust board to provide axial constraint, and is driven by an eccentric member, such as an eccentric shaft, to perform translational rotation relative to the fix scroll member. During the operation of the scroll compressor, a centrifugal force or a centrifugal torque generated by the rotation of the eccentric member may cause vibration of the compressor. A balance block is generally arranged on the rotating component, such as a rotor, to provide a reverse centrifugal force or a reverse centrifugal torque to balance a dynamic unbalance generated by the eccentric member.

[0005] There are mainly two ways to arrange the balance block of the scroll compressor, which includes arranging the balance block inside the main bearing housing and outside the main bearing housing.

[0006] The advantage of arranging the balance block inside the main bearing housing is that the balance block is located closer to an unbalanced area, the cost for solving the unbalanced torque is lower, the pressure on the driving shaft is smaller, and the reliability is higher. In addition, the rotation of the balance block can stir the lubricating oil to ensure the oil supply to the thrust surface and improve the reliability of the thrust bearing. The disadvantage is that the balance block needs to be arranged inside the main bearing housing, and the outer diameter of the balance block cannot be too large due to the restriction of the opening of the thrust surface of the main bearing housing. However, the contradiction is that the larger the outer diameter of the balance block, the smaller the required mass. As the outer diameter increases, the volume of the balance block becomes larger, and the main bearing housing has to be made larger correspondingly to accommodate the balance block. Therefore, the structure of the main bearing housing and balance block is oversized and the cost is high.

[0007] The advantage of arranging the balance block outside the main bearing housing is that the balance block is not limited by the main bearing housing, the cost is low and the structure is simple. However, the balance effect is poor, and the reliability of the bearing decreases.

[0008] In view of this, those skilled in the art urgently need to improve the structure of the conventional scroll compressor to combine the features of a simple structure, a low cost and a good balance effect.

SUMMARY

[0009] A scroll compressor and a method for assembling a scroll compressor are provided according to the present disclosure, to solve the problems in the conventional art.

[0010] According to an aspect of the present disclosure, a scroll compressor is provided, which includes: a main bearing housing, a driving shaft, and a balance block. The main bearing housing is configured to connect with a fix scroll of the scroll compressor and support an orbiting scroll of the scroll compressor, where the main bearing housing has a receiving chamber and a thrust surface through-hole connected to the receiving chamber, the thrust surface through-hole is formed on a thrust surface of the main bearing housing for supporting the orbiting scroll. The driving shaft extends through the main bearing housing and penetrates the thrust surface through-hole to drive the orbiting scroll to perform a translational rotation relative to the fix scroll. The balance block is arranged on the driving shaft and configured to provide a reverse centrifugal force or a reverse centrifugal torque to balance dynamic unbalance generated by an eccentric shaft section of the driving shaft. The balance block includes: a fixed block and a movable block. The fixed block is configured to be arranged into the receiving chamber through the thrust surface through-hole and fixedly connected to the driving shaft. The movable block is configured to be arranged into the receiving chamber through the thrust surface through-hole, and move radially away from the driving shaft to a preset position, and is connected to the fixed block; or the movable block is configured to be arranged into the receiving chamber through a radial through-hole formed on the main bearing housing, and move radially towards the driving shaft to a preset position, and is connected to the fixed block.

[0011] In an embodiment, the scroll compressor further includes a plug, and the plug is configured to block the radial through-hole.

[0012] In an embodiment, the plug is connected to the main bearing housing in a statically sealed manner.

[0013] In an embodiment, an inner wall of the receiving chamber includes: a conical surface, a first cylindrical surface, and an annular surface. The first cylindrical surface is formed by extending upward from a large-diameter end of the conical surface. The annular surface is formed by extending radially inward from an upper end of the first cylindrical surface. The main bearing housing includes a second cylindrical surface, the second cylindrical surface is formed by extending downward from a small-diameter end of the conical surface. The driving shaft sequentially extends through the second cylindrical surface, the conical surface, the first cylindrical surface and the annular surface, the fixed block is located in a space surrounded by the conical surface, the movable block is located in a space surrounded by the first cylindrical surface, and the thrust surface through-hole is formed on the annular surface.

[0014] In an embodiment, the movable block moves radially relative to the fixed block through a guide groove and a guide protrusion that adapted to each other; one of the guide groove and the guide protrusion is arranged on the fixed block, and the other one of the guide groove and the guide protrusion is arranged on the movable block.

[0015] In an embodiment, the guide groove is a wedge-shaped groove extending radially, and correspondingly, the guide protrusion is a wedge-shaped protrusion extending radially.

[0016] In an embodiment, the movable block is detachably connected to the fixed block through fasteners.

[0017] In an embodiment, the main bearing housing comprises: a main body and at least two connecting arms. The main body is configured to support the orbiting scroll and is provided with the receiving chamber. The at least two connecting arms are arranged separately on an outer peripheral wall of the main body along a circumferential direction, and each of the connecting arms is formed by extending radially outward from the main body, and the connecting arms are connected to the fix scroll.

[0018] According to another aspect of the present disclosure, a method for assembling a scroll compressor is provided according to the present disclosure, which is specifically applied to the scroll compressor as described in any of the above embodiments. The method includes: arranging the fixed block into the receiving chamber through the thrust surface through-hole and connecting the fixed block to the driving shaft; arranging the movable block into the receiving chamber through the thrust surface through-hole; driving the movable block to move radially away from the driving shaft relative to the fixed block to a preset position; and connecting the movable block to the fixed block. Alternatively, the method includes: arranging the fixed block into the receiving chamber through the thrust surface through-hole and connecting the fixed block to the driving shaft; arranging the movable block into the receiving chamber through the radial through-hole; driving the movable block to move radially towards the driving shaft relative to the fixed block to a preset position; and connecting the movable block to the fixed block.

[0019] In an embodiment, after connecting the movable block to the fixed block, the method further includes: sealing the radial through-hole.

[0020] One of the beneficial effects of the scroll compressor and the method for assembling the same according to the present disclosure is that the scroll compressor of the present disclosure adopts a split type balance block to meet different balance block requirements by changing the weight and/or shape of the movable block. In addition, during assembly, the movable block is arranged into the receiving chamber through a thrust surface through-hole or a radial through-hole, and the movable block is driven radially relative to the fixed block to a preset position, and finally the movable block is fixedly connected to the fixed block. In this way, the balance block can be arranged inside the main bearing housing to maintain a better balance effect, and the factor of limiting the overall outer diameter of the balance block by the size of the thrust surface through-hole can be eliminated. The appropriate outer diameter of the balance block can be selected according to actual needs, making the entire scroll compressor reliable, low-cost, and with a good balance effect.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the present disclosure.

Figure 1 is a schematic sectional view of a structure of a scroll compressor according to an embodiment of the present disclosure in an axial direction;

Figure 2 is a schematic explosive view of a structure of a balance block according to an embodiment of the present disclosure;

Figure 3 is a schematic diagram of a structure when a movable block is arranged in an initial position of a main bearing housing according to an embodiment;

Figure 4 is a schematic diagram of a structure when a movable block is driven to a preset position of a fixed block according to an embodiment;

Figure 5 is a schematic diagram of a structure after connecting a movable block and a fixed block according to an embodiment;

Figure 6 is a flowchart of a method for assembling a scroll compressor according to the present disclosure; and

Figure 7 is a flowchart of another method for assembling a scroll compressor according to the present disclosure.

[0022] The one-to-one correspondence between the component names and reference numerals in Figures 1 to 5 is described as follows:
1. Body; 2. Fix scroll; 3. Orbiting scroll; 4. Driving shaft; 5. Main bearing housing; 50. Receiving chamber; 500. Conical surface; 501. First cylindrical surface; 502. Annular surface; 503. Second cylindrical surface; 51. Thrust surface through-hole; 60. Fixed block; 600. Central hub part; 601. Peripheral part; 602. Second axial extension step section; 603. First mounting hole; 604. First straight radial inward surface; 605. First axial extension step section; 606. Second straight surface; 607. Balance block rotation direction; 61. Movable block; 610. Internal radial part; 611. External radial part; 612. Second mounting hole; 614. First straight radial outward surface; 615. Second axial extension section; 616. Second straight radial outward surface; 617. Third straight surface.

DETAILED DESCRIPTION OF EMBODIMENTS

[0023] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions, and values described in these embodiments do not limit the scope of the present disclosure unless otherwise specified.

[0024] The following description of at least one exemplary embodiment is merely illustrative and should not be construed as any limitation on the present disclosure or its application or use.

[0025] The techniques, methods, and devices known to those skilled in the art may not be described in detail, but in appropriate circumstances, such techniques, methods, and devices should be considered as a part of the specification.

[0026] In all the examples shown and described herein, any specific value should be interpreted as merely illustrative rather than restrictive. Therefore, different values may be used for other examples in the exemplary embodiments.

[0027] It should be noted that similar labels and characters represent similar items in the figures. Therefore, once an item is defined in one figure, such item does not need to be further described in subsequent figures.

[0028] The scroll compressor of the present disclosure includes a fix scroll, an orbiting scroll, a main bearing housing, a driving shaft and a balance block. The main bearing housing is configured to be connected to the fix scroll and support the orbiting scroll. The main bearing housing has a receiving chamber and a thrust surface through-hole connected to the receiving chamber. The thrust surface through-hole is formed on a thrust surface on the main bearing housing for supporting the orbiting scroll. The driving shaft extends through the main bearing housing and penetrates the thrust surface through-hole to drive the orbiting scroll to perform translational rotation relative to the fix scroll. The balance block is arranged on the driving shaft and is configured to provide a reverse centrifugal force or a reverse centrifugal torque to balance the dynamic unbalance generated by the eccentric part of the driving shaft. Moreover, the balance block includes a fixed block and a movable block. The fixed block is configured to be arranged into the receiving chamber through the thrust surface through-hole and fixedly connected to the driving shaft. The movable block is configured to be arranged into the receiving chamber through the thrust surface through-hole, and then move radially away from the driving shaft until it is connected to the balance block. Alternatively, the movable block may be configured to be arranged into the receiving chamber through a radial through-hole provided in the main bearing housing, and then move radially towards the driving shaft until it is connected to the balance block.

[0029] The scroll compressor of the present disclosure adopts a split type balance block to meet different balance block requirements by changing the weight and/or shape of the movable block. In addition, during assembly, the movable block is arranged into the receiving chamber through a thrust surface through-hole or a radial through-hole, and the movable block is driven radially relative to the fixed block to a preset position, and finally the movable block is fixedly connected to the fixed block. In this way, the balance block can be arranged inside the main bearing housing to maintain a better balance effect, and the factor of limiting the overall outer diameter of the balance block by the size of the thrust surface through-hole can be eliminated. The appropriate outer diameter of the balance block can be selected according to actual needs, making the entire scroll compressor reliable, low-cost, and with a good balance effect.

[0030] For ease of understanding, the specific structure and operating principle of the scroll compressor of the present disclosure will be described in detail with reference to Figures 1 and 2, combined with two specific embodiments.

[0031] It should be noted that the terms "axial", "radial", and "circumferential" used herein to describe the specific structure of the scroll compressor are set with reference to the driving shaft. The axial direction refers to an axial direction along the driving shaft, the radial direction refers to a radial direction along the driving shaft, and the circumferential direction refers to a circumferential direction of the driving shaft.

First Embodiment

[0032] Referring to Figure 1, in this embodiment, the scroll compressor includes a body 1, a fix scroll 2, and an orbiting scroll 3.

[0033] The body 1 is usually a shell with a thin wall, and an internal space of the body is sufficient to accommodate the fix scroll 2, the orbiting scroll 3, and a driving mechanism that drives the orbiting scroll 3 to rotate around the fix scroll 2.

[0034] Both the fix scroll 2 and the orbiting scroll 3 have scroll shaped blades, which are meshed with each other at an interlocked angle of 180°. The orbiting scroll 3 is driven by a driving eccentric shaft with a small eccentricity, and is constrained by an anti-rotation mechanism to perform a planar motion around the fix scroll 2 with a small radius, so as to form a series of crescent shaped cylindrical volumes in conjunction with the end plate.

[0035] It should be noted that the specific structures and assembly relationship of the body 1, the fix scroll 2, and the orbiting scroll 3 can be realized by those skilled in the art by using the conventional art, and will not be repeated here.

[0036] Continually referring to Figure 1, the scroll compressor further includes a driving shaft 4, a main bearing housing 5 and a balance block.

[0037] The main bearing housing 5 is configured to be connected to the fix scroll 2 and support the orbiting scroll 3, and the main bearing housing 5 has a receiving chamber 50 and a thrust surface through-hole 51 connected to the receiving chamber 50. The thrust surface through-hole 51 is formed on a thrust surface of the main bearing housing 5 for supporting the orbiting scroll 3.

[0038] Specifically, the main bearing housing 5 includes a main body and four connecting arms 52. The main body is configured to support the orbiting scroll 3 and is provided with a receiving chamber. The four connecting arms 52 are arranged separately on the outer peripheral wall of the main body along a circumferential direction, and each connecting arm 52 is formed by extending radially outward from the main body. The connecting arms 52 are fixedly connected to the fix scroll 2 by welding, bonding, riveting or other ways, or may be detachably connected to the fix scroll 2 by fasteners such as screws and bolts. The top surface of the main body is the thrust surface, which contacts the orbiting scroll 3 to support the orbiting scroll 3. The thrust surface supports the orbiting scroll to enable it rotate relative to the fix scroll 2.

[0039] It can be understood that the number of the connecting arms 52 is not limited to the number in this embodiment, as long as it is an integer of two or more, and those skilled in the art can choose the appropriate number based on the actual structure.

[0040] The driving shaft 4 includes interconnected main shaft section and eccentric shaft section. The main shaft section is coaxially connected to a rotor of a driving motor, and the main shaft section extends through the main bearing housing 5. The eccentric shaft section of the driving shaft 4 extends through the thrust surface through-hole 51 of the main bearing housing and is connected to the orbiting scroll 3, so that the eccentric shaft section drives the orbiting scroll 3 to perform translational rotation relative to the fix scroll 2.

[0041] The balance block is arranged at the main shaft section of the driving shaft 4 through key connection, welding, bonding and the like, so that the balance block can rotate synchronously with the driving shaft 4, and the balance block is configured to provide a reverse centrifugal force or a reverse centrifugal torque to balance the dynamic unbalance generated by the eccentric shaft section of the driving shaft.

[0042] Referring to Figure 2, in this embodiment, the balance block includes a fixed block 60 and a movable block 61. The fixed block 60 includes a central hub part 600 and a peripheral part 601, and the peripheral part 601 has one or more first mounting holes 603. The movable block 61 includes an inner radial part 610 and an outer radial part 611, and the inner radial part 610 has one or more second mounting holes 612. In this embodiment, the fixed block 60 has a substantially uniform thickness. In the movable block 61, the inner radial part 610 has a first thickness, and the outer radial part 611 has a second thickness. The first thickness is greater than the second thickness.

[0043] The peripheral part 601 of the fixed block 60 includes a first axially extension step section 605 having a first straight radially inward surface 604. The terms "radially inward" and "radially outward" are used relative to a longitudinal axis of the driving shaft 4 when the balance block is assembled to the driving shaft 4. In the specific embodiment shown in Figure 2, the fixed block 60 includes a second axially extension step section 602, which has a second straight surface 606 of the fixed block, the second straight surface 606 of the fixed block is perpendicular to the first straight radially inward surface 604. In the illustrated embodiment, the second straight surface 606 of the fixed block 60 faces a rotation direction of the balance block (as indicated by the arrow 607).

[0044] The inner radial part 610 of the movable block 61 has a first axial extension section 613, which has a first straight radial outward surface 614. The internal radial part 610 further includes a second axial extension section 615, which has a second straight radial outward surface 616 and a third straight surface 617. The third straight surface 617 is perpendicular to the first straight radially outward surface 614 and the second straight radially outward surface 616. In a case that the movable block 61 is attached to the fixed block 60, the third straight surface 617 faces in a direction opposite to the rotation direction of the balance block (as indicated by the arrow 607).

[0045] The first straight radially outward surface 614 and the second straight radially outward surface 616 are configured to abut against the first straight radially inward surface 604 of the fixed block 60, to assist in positioning the movable block 61 relative to the fixed block 60. The third straight surface 617 of the movable block 61 is configured to abut against the second straight surface 606 of the fixed block 60 to assist in positioning the movable block 61 relative to the fixed block 60. In addition, the nipples between the first straight radially outward surface 614 and the second straight radially outward surface 616 with the first straight radially inward surface 604 as well as the nipples between the second straight surface 606 and the third straight surface 617 of the fixed block may absorb a part of the centrifugal force generated when the balance block rotates around the driving shaft 4.

[0046] However, in other embodiments, the movable block 61 moves radially relative to the fixed block 60 through a guide groove and a guide protrusion that are adapted to each other. The guide groove is arranged on the fixed block 60, the guide protrusion is arranged on the movable block, or the guide groove is arranged on the movable block 61, and the guide protrusion is arranged on the fixed block 60. In this way, the movable block 61 moves along the guide groove and guide protrusion relative to the fixed block 60, which can quickly complete the assembly of the balance block.

[0047] Specifically, the guide groove is a wedge-shaped groove extending radially, and correspondingly, the guide protrusion is a wedge-shaped protrusion extending radially.

[0048] During assembly, the fixed block 60 is configured to be arranged into the receiving chamber 50 through the thrust surface through-hole 51 and fixedly connected to the driving shaft 4, as shown in Figure 3. The movable block is configured to be arranged into the receiving chamber 50 through the thrust surface through-hole 51, and driven radially away from the driving shaft 4 to a preset position as shown in Figure 4. Finally, the movable block 61 is detachably connected to the fixed block 60 through screws, bolts, and other fasteners to be in a state as shown in Figure 5, or fixedly connected to the fixed block 60 by welding, bonding, riveting or other ways.

[0049] In order to further optimize the structure of the main bearing housing 5 and minimize its overall volume while meeting assembly functional requirements, as shown in Figure 1, the inner wall of the receiving chamber includes a conical surface 500, a first cylindrical surface 501, and a annular surface 502, and the main body of the main bearing housing 5 includes a second cylindrical surface 503. The first cylindrical surface 501 is formed by extending upward from the large-diameter end of the conical surface 500, the second cylindrical surface 503 is formed by extending downward from the small-diameter end of the conical surface 500, and the annular surface 502 is formed by extending radially inward from the upper end of the first cylindrical surface 501.

[0050] The driving shaft 4 sequentially extends through the second cylindrical surface 503, the conical surface 500, the first cylindrical surface 501, and the annular surface 502. The fixed block 60 is located in the space surrounded by the conical surface 500, the movable block 61 is located in the space surrounded by the first cylindrical surface 501, and the thrust surface through-hole 51 is formed on the annular surface 502.

Second Embodiment

[0051] A main difference of the second embodiment compared with the first embodiment is that the main bearing housing 5 is provided with a radial through-hole (not shown in the figures), and the movable block 6 is configured to be arranged into the receiving chamber 50 through the radial through-hole, and driven radially towards the driving shaft 4 to a preset position. Finally, the movable block 61 is connected to the fixed block 60. Other parts are the same as the first embodiment, and those skilled in the art can fully understand them based on the description of the first embodiment and the drawings, and will not repeat herein.

[0052] Furthermore, the scroll compressor includes a plug (not shown in the figure) that is configured to block the radial through-hole to prevent external dust from falling into the receiving chamber 50 through the radial through-hole. Specifically, the plug can be a bolt with a nut, and the main bearing housing 5 is provided with internal threads that match with the bolt. In a case that the movable block 61 and the fixed block 60 are assembled, the bolt may be screwed into the radial through-hole.

[0053] More specifically, the plug is sealingly connected to the main bearing housing 5 through a sealing ring, such as an O-ring seal, which is sealingly arranged between the nut of the bolt and a corresponding surface of the main bearing housing.

[0054] In addition, based on the above two types of structures of the scroll compressor, two types of method for assembling the scroll compressor are further provided according to the present disclosure, which are described in detail below with reference to Figures 6 and 7. It should be noted that only the method for assembling the balance block is described herein, and method for assembling other components of the scroll compressor is not limited herein.

[0055] Referring to Figures 1 and 6, a method for assembling the scroll compressor according to the present disclosure includes the following steps S100 to S103.

[0056] In step S100, the fixing block 60 is arranged into the receiving chamber 50 through the thrust surface through-hole 51 and is connected to the driving shaft 4.

[0057] In step S101, the movable block 61 is arranged into the receiving chamber 50 through the thrust surface through-hole 51.

[0058] In step S102, the movable block 61 is driven to move radially away from the driving shaft 4 relative to the fixed block 60 to a preset position.

[0059] In step 103, the movable block 61 is connected to the fixed block 60.

[0060] Referring to Figure 7, another method for assembling the scroll compressor according to the present disclosure includes the following steps S200 to S204.

[0061] In step S200, the fixing block 60 is arranged into the receiving chamber 50 through the thrust surface through-hole 51 and is connected to the driving shaft 4.

[0062] In step S202, the movable block 61 is arranged into the receiving chamber 50 through the radial through-hole.

[0063] S202, the movable block 61 is driven to move radially towards the driving shaft 4 relative to the fixed block 60 to the preset position.

[0064] In step S203, the movable block 61 is connected to the fixed block 60.

[0065] Continually referring to Figure 7, in this embodiment, after step S203, the method further includes the following step S204.

[0066] In step S204, the radial through-hole is sealed.

[0067] Specifically, the plug may be a bolt with a nut, and the main bearing housing 5 is provided with internal threads that match with the bolt. In a case that the movable block 61 and the fixed block 60 are assembled, the bolt may be screwed into the radial through-hole.

[0068] More specifically, the plug is sealingly connected to the main bearing housing 5 through a sealing ring, such as an O-ring seal, which is sealingly arranged between the nut of the bolt and a corresponding surface of the main bearing housing.

[0069] Similarly, with the above two assembly methods, the movable block is arranged into the receiving chamber through a thrust surface through-hole or a radial through-hole, the movable block is driven radially relative to the fixed block to a preset position, and finally the movable block is fixedly connected to the fixed block. In this way, the balance block can be arranged in the main bearing housing to maintain a better balance effect, and the factor of limiting the overall outer diameter of the balance block by the size of the thrust surface through-hole can be eliminated. The appropriate outer diameter of the balance block can be selected according to actual needs, making the entire scroll compressor reliable, low-cost, and with good balance effect.

[0070] Various embodiments of the present disclosure have been described above, and the foregoing description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes made without departing from the scope and spirit of the disclosed embodiments will be apparent to those skilled in the art. The terms used herein is chosen to best explain the principles of the embodiments, practical applications, or improvements to techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is limited by the claims.

Claims

1. A scroll compressor, comprising:

a main bearing housing, configured to connect with a fix scroll of the scroll compressor and support an orbiting scroll of the scroll compressor, wherein the main bearing housing has a receiving chamber and a thrust surface through-hole connected to the receiving chamber, the thrust surface through-hole is formed on a thrust surface of the main bearing housing for supporting the orbiting scroll;

a driving shaft, wherein the driving shaft extends through the main bearing housing and penetrates the thrust surface through-hole to drive the orbiting scroll to perform a translational rotation relative to the fix scroll; and

a balance block, wherein the balance block is arranged on the driving shaft and configured to provide a reverse centrifugal force or a reverse centrifugal torque to balance dynamic unbalance generated by an eccentric shaft section of the driving shaft,

the balance block comprises:

a fixed block, configured to be arranged into the receiving chamber through the thrust surface through-hole and fixedly connected to the driving shaft; and

a movable block, wherein the movable block is configured to be arranged into the receiving chamber through the thrust surface through-hole, and move radially away from the driving shaft to a preset position, and is connected to the fixed block; or the movable block is configured to be arranged into the receiving chamber through a radial through-hole formed on the main bearing housing, and move radially towards the driving shaft to a preset position, and is connected to the fixed block.

2. The scroll compressor according to claim 1, wherein the scroll compressor further comprises a plug, and the plug is configured to block the radial through-hole.

3. The scroll compressor according to claim 2, wherein the plug is connected to the main bearing housing in a statically sealed manner.

4. The scroll compressor according to claim 1, wherein an inner wall of the receiving chamber comprises:

a conical surface;

a first cylindrical surface, wherein the first cylindrical surface is connected with the conical surface at an edge of the conical surface with a large diameter; and

an annular surface, wherein the annular surface extends radially inward from an upper edge of the first cylindrical surface,

the main bearing housing comprises a second cylindrical surface, the second cylindrical surface is connected with the conical surface at an edge of the conical surface with a small diameter, and

the driving shaft sequentially extends through the second cylindrical surface, the conical surface, the first cylindrical surface and the annular surface, the fixed block is located in a space surrounded by the conical surface, the movable block is located in a space surrounded by the first cylindrical surface, and the thrust surface through-hole is formed on the annular surface.

5. The scroll compressor according to claim 1, wherein the movable block moves radially relative to the fixed block through a guide groove and a guide protrusion that adapted to each other;
one of the guide groove and the guide protrusion is arranged on the fixed block, and the other one of the guide groove and the guide protrusion is arranged on the movable block.

6. The scroll compressor according to claim 5, wherein the guide groove is a wedge-shaped groove extending radially, and correspondingly, the guide protrusion is a wedge-shaped protrusion extending radially.

7. The scroll compressor according to claim 1, wherein the movable block is detachably connected to the fixed block through fasteners.

8. The scroll compressor according to claim 1, wherein the main bearing housing comprises:

a main body, configured to support the orbiting scroll and is provided with the receiving chamber; and

at least two connecting arms, arranged separately on an outer peripheral wall of the main body along a circumferential direction, and each of the connecting arms is formed by extending radially outward from the main body, and the connecting arms are connected to the fix scroll.

9. A method for assembling a scroll compressor, applied to the scroll compressor according to any one of claims 1 to 8, wherein the method comprises:

arranging the fixed block into the receiving chamber through the thrust surface through-hole and connecting the fixed block to the driving shaft;

arranging the movable block into the receiving chamber through the thrust surface through-hole;

driving the movable block to move radially away from the driving shaft relative to the fixed block to a preset position; and

connecting the movable block to the fixed block, or

the method comprises:

arranging the fixed block into the receiving chamber through the thrust surface through-hole and connecting the fixed block to the driving shaft;

arranging the movable block into the receiving chamber through the radial through-hole;

driving the movable block to move radially towards the driving shaft relative to the fixed block to a preset position; and

connecting the movable block to the fixed block.

10. The assembly method according to claim 9, wherein after the step of connecting the movable block to the fixed block, the method further comprises:
sealing the radial through-hole.

Drawing