|
(11) | EP 3 034 447 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
|
|
|
|
|||||||||||||||||||||||
| (54) | TWO NODAL POINT PRESSURE-EQUALISING DEVICE OF STEEL ROPE SETS FOR ELEVATOR |
| (57) Disclosed is a two nodal point pressure-equalising device of steel rope sets for
an elevator, comprising a pres - sure-equalising device main body (1); wherein the
pressure-equalising device main body (1) is rotatably provided on a base seat (5);
two spherical nodal points (8) are symmetrically provided on the pressure-equalising
device main body (1); the centre of the spheric¬al nodal points (8) is provided with
a through hole (9); the through hole (9) is used for mounting a steel rope; the spherical
nodal points (8) can rotate around the pressure-equalising device main body (1); the
rotational centre of the pressure-equalising device main body (1) is located on the
centre line thereof; and the rotational centre of each spherical nodal point (8) is
on the same hori - zontal plane as the rotational centre of the pressure-equalising
device main body (1) and is collinear. The device can adjust the pres - sure sustained
by two sets of steel ropes, and when a stable state is reached, the pressure sustained
by each steel rope set will be the same, thereby enabling the damage caused by unequal
pressure sustained by steel ropes for an elevator to be overcome, increasing the service
life of the steel ropes. |
Technical Field
[0001] The invention relates to a pressure-equalising device of steel rope sets for an elevator, and more particularly, to a two nodal pressure-equalising device of two steel rope sets for an elevator capable of adjusting a pressure sustained to two steel rope sets and enabling the pressure sustained between these two steel rope sets to be the same.
Background Art
[0002] At present, domestic and overseas elevators generally adopts a traction machine to drive. A traction elevator suspending and lifting system is composed of a traction wheel, a steel rope set, a car platform sill, a balance block system and other main parts; a friction pressure generated by winding each steel rope of the steel rope set in a groove of the traction wheel in the traction elevator suspending and lifting system provides a power for the car platform sill to lift up or down; under the adjustment that the elevator driving technology keeps developing, both the lifting height of the elevator and the running speed are greatly improved, at the same time, higher requirements are also proposed on the safety and the reliability of the elevator. Theoretically, the pressure sustained to each steel rope in the steel rope set shall be the same in the using process of the elevator, and the shape and the size of the groove for winding the steel rope on the traction wheel shall also be the same; but in the actually using process, the pressure sustained to each steel rope in the steel rope set shall be different due to various reasons, this results in a situation that some steel ropes are pressured highly and some steel ropes are pressured lowly; the friction pressure between the highly-pressured steel rope and the groove on the corresponding traction wheel will relatively higher, this results in a condition that the friction of the groove on the corresponding traction wheel is more severe, so the shape and the size of the groove on the corresponding traction wheel are changed over time, resulting in that the highly-pressured steel rope is pressured more and more in work. If the radius of the worn groove on the traction wheel is reduced by 0.1mm, the steel rope will move less than 0.314mm; by taking the 20-storey building for example, the traction wheel will rotate about 100 turns, so the steel rope will move less than 31.4mm. Through test, it is discovered that the steel rope will pressured more than about 3000N; when the steel rope in the steel rope set is pressured unevenly, a wriggling phenomenon is generated between the lowly-pressured steel rope and the traction wheel, the wriggling between the steel rope and the traction wheel will cause the abrasion of the steel rope and the traction wheel; the higher the storey is, the more severe the situation above becomes. Therefore, the highly-pressured steel rope used for a long time is easy to break in the using process, resulting in safety accidents of the elevator; at the same time, the lowly-pressured steel rope will also be damaged due to the abrasion of the traction wheel. If the damage is severe, the steel rope will also be broken to result in the safety accidents of the elevator; for this reason, we develop a two nodal pressure-equalising device of steel rope sets for an elevator capable of adjusting the pressure to two steel rope sets and enabling these two steel rope sets to pressure the same.
Summary of the Invention
[0003] The object of the invention is to overcome the shortages of the prior art and is intended to provide a two nodal pressure-equalising device of steel rope sets for an elevator capable of adjusting the pressure to two steel rope sets and enabling these two steel rope sets to pressure the same.
[0004] In order to implement the above object, the present invention employ the following technical solutions: a two nodal point pressure-equalising device of steel rope sets for an elevator includes a pressure-equalising device main body, wherein the pressure-equalising device main body is rotatably provided on a base seat; two spherical nodal points are symmetrically provided on the pressure-equalising device main body; the spherical nodal points are mounted with the steel rope sets; the spherical nodal points can rotate around the pressure-equalising device main body; the rotation centre of the pressure-equalising device main body is located on the centre line thereof; and the rotation centre of each spherical nodal point is on the same horizontal plane as the rotational centre of the pressure-equalising device main body and is collinear.
[0005] Preferably, two spherical cavities are symmetrically provided on the pressure-equalising device main body; the spherical nodal point is arranged in each spherical cavity, and cam rotate.
[0006] Preferably, the lower portion of the pressure-equalising device main body is provided with a rotating mount; the centre line of the pressure-equalising device main body and the centre line of the rotating mount are collinear; the bottom of the rotating mount is provided with an arc-shaped bump; the base seat is provided with an arc-shaped groove; and when the arc-shaped bump is arranged in the arc-shaped groove, the arc-shaped bump can rotate around the arc-shaped groove.
[0007] Preferably, the pressure-equalising device main body is opened with a screw hole, and a screw can fix the rotating mount at the lower portion of the pressure-equalising device main body via the screw hole.
[0008] Preferably, the base seat is uniformly distributed with fixed holes to conveniently mount the base seat.
[0009] The centre of the spherical nodal point is provided with a through hole for accommodating the steel rope.
[0010] Due to the application of the foregoing technical solution, the present invention has the following advantages compared to the prior art:
According to the two nodal point pressure-equalising device of the steel rope sets for the elevator described in the present invention, the pressure-equalising device main body is rotatably provided on a base seat; two spherical nodal points are symmetrically provided on the pressure-equalising device main body; the centre of the spherical nodal points is provided with a through hole; the through hole is used for mounting a steel rope; the spherical nodal points can rotate around the pressure-equalising device main body; the rotation centre of the pressure-equalising device main body is located on the centre line thereof; and the rotation centre of each spherical nodal point is on the same horizontal plane as the rotational centre of the pressure-equalising device main body and is collinear. The device can adjust the pressure sustained by two sets of steel ropes, and when a stable state is reached, the pressure sustained by two steel rope sets will be the same, thereby enabling the damage caused by unequal pressure sustained by the steel rope set for the elevator to be overcome, increasing the service life of the steel ropes, and improving the safety of the elevator.
Brief Description of the Drawings
[0011] The technical scheme of the invention will be further described hereinafter with reference to the drawings.
[0012] Fig. 1 is a sectional vie of a two nodal point pressure-equalising device of steel rope sets for an elevator described in the present invention;
Wherein: 1. two nodal point pressure-equalising device of the steel rope sets for the elevator; 2. spherical cavity; 3. screw hole; 4. rotating mount; 5. base seat; 6. arc-shaped bump; 7. arc-shaped groove; 8. spherical nodal point; 9. through hole; 10. fixed hole.
Detailed Description of the Preferred Embodiments
[0013] The present invention will be further described in details hereinafter with reference to the drawings and the specific embodiments.
[0014] Fig. 1 is a two nodal point pressure-equalising device of a steel rope set for an elevator corresponding to the first embodiment according to the invention, which is mounted at the head or tail of a dragging steel rope set (without being shown in the figure) and includes a pressure-equalising device main body 1; the pressure-equalising device main body 1 can be rotatably provided on a base seat 5; two spherical nodal points 8 are symmetrically provided on the pressure-equalising device main body 2 to mount two steel rope sets; the centre of the spherical nodal points 8 is provided with a through hole 9; the through hole 9 is used for mounting a steel rope; the spherical nodal points 8 can rotate around the pressure-equalising device main body 1; the rotation centre of the pressure-equalising device main body 1 is located on the centre line thereof; and the rotation centre of each spherical nodal point 8 is on the same horizontal plane as the rotational centre of the pressure-equalising device main body 1 and is collinear.
[0015] In the embodiment, as shown in Fig. 1, two spherical cavities 2 are symmetrically provided on the pressure-equalising device main body 1 along the centre line; the spherical nodal point 8 is arranged in each spherical cavity 2 and can rotate; the lower portion of the pressure-equalising device main body 1 is provided with a rotating mount 4; the centre line of the pressure-equalising device main body 1 and the centre line of the rotating mount 4 are collinear; the bottom of the rotating mount 4 is provided with an arc-shaped bump 6; the base 5 is provided with an arc-shaped groove 7; when the arc-shaped bump 6 is placed in the arc-shaped groove 7, the arc-shaped bump 6 can rotate or wriggle around the arc-shaped groove 7; the pressure-equalising device main body 1 is provided with a screw hole 3, a screw (without being shown) can fix the rotating mount 4 at the lower portion of the pressure-equalising device main body 4 via the screw hole 3; and the base seat 5 is uniformly distributed with fixed holes 10 to conveniently mount the base seat 5.
[0016] Of course, in the embodiment, the arc-shaped bump 6 can also be set as a spherical bump, and the corresponding arc-shaped groove 7 is set as a spherical groove.
[0017] Due to the application of the technical solution above, the present invention has the following advantages compared with the prior art: according to the two nodal point pressure-equalising device of the steel rope sets for the elevator described in the present invention, wherein the pressure-equalising device main body is rotatably provided on a base seat to balance the pressures at both ends thereof by wiggling around the rotation centre; two spherical nodal points are symmetrically provided on the pressure-equalising device main body; the centre of the spherical nodal points is provided with a through hole; the through hole is used for mounting a steel rope; the spherical nodal points can rotate or wiggle around the pressure-equalising device main body; the rotation centre of the pressure-equalising device main body is located on the centre line thereof; and the rotation centre of each spherical nodal point is on the same horizontal plane as the rotational centre of the pressure-equalising device main body and is collinear. In this way, the two nodal point pressure-equalising device according to the present invention enables each independent traction steel rope to have a mechanics relationship correlative to the other steel rope by means of an oscillating bar and the lever principle, i.e., the change in the pressure sustained to any steel rope will transmit to the spherical nodal points under the condition that the pressure is sustained to the traction steel rope set, and the spherical nodal point is pressured to wiggle to enable the pressure-equalising device main body to lose balance to wiggle around the rotation centre. In this way, the change in the pressure sustained to the spherical nodal point will be transmitted to the other spherical nodal point to enable the pressure sustained to these two spherical nodal points to balance, i.e., the pressure sustained to each steel rope set to be equal by means of the lever principle (the moment is equal to the pressure multiplying by the distance).
[0018] The device according to the solution of the present invention can adjust the pressure sustained by two sets of steel ropes, and when a stable state is reached, the pressure sustained by two steel rope sets will be the same, thereby enabling the damage caused by unequal pressure sustained by the steel rope set for the elevator to be overcome, increasing the service life of the steel ropes, and improving the safety of the elevator.
[0019] The embodiments above are only for describing the technical through and features of the invention, with a view to enabling the technical personnel who are familiar with the technology to understand the content of the invention and implement, but not intended to limit the protection scope of the present invention. Any equivalent change or modification made according to the spiritual essence of the present invention shall all fall within the protection scope of the present invention.
1. A two nodal point pressure-equalising device of steel rope sets for an elevator, comprising
a pressure-equalising device main body, wherein the pressure-equalising device main
body is rotatably provided on a base seat; two spherical nodal points are symmetrically
provided on the pressure-equalising device main body; the spherical nodal points are
matched and connected with the steel rope sets; the spherical nodal points can rotate
or wiggle around the pressure-equalising device main body; the rotation centre of
the pressure-equalising device main body is located on the centre line thereof; and
the rotation centre of each spherical nodal point is on the same horizontal plane
as the rotational centre of the pressure-equalising device main body and is collinear.
2. The two nodal point pressure-equalising device of the steel rope sets for the elevator
according to claim 1, wherein two spherical cavities are symmetrically provided on
the pressure-equalising device main body; the spherical nodal point is arranged in
each spherical cavity, and cam rotate or wiggle.
3. The two nodal point pressure-equalising device of the steel rope sets for the elevator
according to claim 1, wherein the lower portion of the pressure-equalising device
main body is provided with a rotating mount; the centre line of the pressure-equalising
device main body and the centre line of the rotating mount are collinear; the bottom
of the rotating mount is provided with an arc-shaped bump; the base is provided with
an arc-shaped groove; and when the arc-shaped bump is placed in the arc-shaped groove,
the arc-shaped bump can rotate around the arc-shaped groove.
4. The two nodal point pressure-equalising device of the steel rope sets for the elevator
according to claim 3, wherein the pressure-equalising device main body is provided
with a screw hole, a screw can fix the rotating mount at the lower portion of the
pressure-equalising device main body via the screw hole.
5. The two nodal point pressure-equalising of the steel rope set for the elevator according
to claim 1, wherein the base seat is uniformly distributed with fixed holes to conveniently
mount the base seat.
6. The two nodal point pressure-equalising of the steel rope set for the elevator according
to claim 1, wherein the centre of the spherical nodal points is provided with a through
hole for accommodating a steel rope.