High-redundancy safety protection and automatic correction diversion sheave and use method thereof

Abstract

The high-redundancy safety protection and automatic correction diversion sheave comprises a diversion sheave body, a shaft pin, a counterweight frame and an automatic correction mechanism, a bearing seat is installed in the diversion sheave body, two sets of first rolling bearings are symmetrically installed in the middle of the interior of the bearing seat, and the bearing seat is installed in the middle of the shaft pin through the first rolling bearings; angular contact knuckle bearings are symmetrically installed in the space between the two ends of the bearing seat and a shaft shoulder of the shaft pin, the counterweight frame is fixed to the end of the shaft pin through cooperation of a bolt and a gasket, the self-correction mechanism is arranged on the outer side of the counterweight frame and used for correcting the angular deviation of the diversion sheave, and a distance sensor is arranged on the outer side of the counterweight frame. The distance sensor is located below the self-correcting mechanism, the angular contact knuckle bearing comprises an outer ring and an inner ring, and a gap is formed between the outer ring and the inner ring. It can be guaranteed that the inclination degree of the diversion sheave is within the set range, and the probability of accidents caused by inclination of the diversion sheave is reduced.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a highly redundant safety protection and self-correcting anti-cord pulley and its method of use. Background Technology

[0002] The deflector pulley is one of the core components of an elevator traction system. Its core function is to change the direction of the traction steel wire rope, increase the traction ratio, and balance the weight difference between the car and the counterweight. Widely used in various types of traction elevators, the deflector pulley is located on the top of the car, the top of the counterweight frame, or in the machine room. Adjusting the direction of the steel wire rope through the deflector pulley can significantly reduce the requirements for building construction. The traditional deflector pulley structure consists of an upper and lower set of rolling bearings supported on a pin shaft. Under normal conditions, the inner and outer rings of the bearings are coaxial with uniform clearance, and the deflector pulley remains vertically aligned. When uneven wear occurs in the bearings, it can cause eccentricity and tilting, resulting in a tilted deflector pulley. If the deflector pulley tilts too much, the steel wire rope may derail due to the excessive tilt angle, easily causing elevator malfunctions and potentially leading to accidents. Summary of the Invention

[0003] The purpose of this invention is to provide a highly redundant safety protection and automatic correction anti-cord pulley and its usage method, which can ensure that the tilt of the anti-cord pulley is within a set range and reduce the probability of accidents caused by the tilt of the anti-cord pulley.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a highly redundant safety protection and self-correcting anti-cord pulley, comprising an anti-cord pulley body, a shaft pin, a counterweight frame, and a self-correcting mechanism. A bearing seat is installed inside the anti-cord pulley body. The bearing seat has a stepped hole structure that mates with the shaft pin. Two sets of first rolling bearings are symmetrically installed in the middle of the bearing seat. The bearing seat is mounted on the middle of the shaft pin via the first rolling bearings. Angular contact joint bearings are symmetrically installed in the space between both ends of the bearing seat and the shoulder of the shaft pin. The counterweight frame is fixed to the end of the axle pin by bolts and washers. The self-correcting mechanism is located on the outside of the counterweight frame to correct the angular deviation of the anti-roll rope pulley. A distance sensor is located on the outside of the counterweight frame, below the self-correcting mechanism. The angular contact spherical bearing includes an outer ring and an inner ring. The inner ring is located on the shoulder of the axle pin, and the outer ring is located above the inner ring and connected to the bearing seat. The upper surface of the outer ring and the lower surface of the inner ring are both arc surfaces, and a gap is provided between the outer ring and the inner ring.

[0005] Furthermore, the end of the pin is provided with a tapered surface, and the counterweight frame is provided with a tapered hole that mates with the tapered surface.

[0006] Furthermore, the two sets of the first rolling bearings are separated by a bushing, which is located in the middle of the pin.

[0007] Furthermore, the outer diameter of the bearing housing and the inner hole of the reverse rope wheel, the first rolling bearing and the bearing housing hole and pin, and the angular contact spherical bearing and the bearing housing hole and pin are all interference fits.

[0008] Furthermore, a retaining ring for positioning is provided on one side of the interior of the anti-rope wheel body and on the outer side of the first and second hole surfaces of the bearing seat.

[0009] Furthermore, the self-correcting mechanism includes an angle correction mechanism bracket and an angle correction mechanism. The angle correction mechanism bracket is fixed to the outside of the counterweight frame, and the angle correction mechanism is mounted on the angle correction mechanism bracket. The angle correction mechanism forms a certain angle α with the anti-rope wheel to correct the angle deviation of the anti-rope wheel body.

[0010] Furthermore, the angle correction mechanism includes a servo motor, a second rolling bearing, a bearing mounting plate, and a linear module. The output end of the servo motor is connected to the linear module, and the slider on the linear module is fixed to the bearing mounting plate. The second rolling bearing is provided at one inner end of the bearing mounting plate.

[0011] A method for using a highly redundant safety protection and self-correcting anti-rope reel includes the following steps: Step S1: The anti-roll wheel works normally, with the first rolling bearing providing rotation and load-bearing function; Step S2: When the first rolling bearing fails due to wear, cracks, or other reasons, the anti-roll wheel will tilt. Step S3: The self-correcting mechanism corrects the tilted anti-roll rope wheel; Step S4: When the self-correcting mechanism fails, the spherical clearance between the inner and outer rings of the angular contact spherical bearing is eliminated, and the non-contact condition is changed to contact. The angular contact spherical bearing then begins to perform rotation and load-bearing functions. Step S5: The initial contact of the angular contact spherical bearing is line contact. When the inner and outer rings of the angular contact spherical bearing change from line contact to surface contact, the motor operating current increases. When the current reaches the set threshold, the system protection function is triggered, and the elevator stops running.

[0012] The beneficial effects of this invention are: 1. The reverse rope wheel can automatically self-correct: The automatic correction mechanism enables the reverse rope wheel to correct itself in time when it is tilted. If it cannot correct itself, it will achieve a protective function through the angular contact joint bearing.

[0013] 2. The addition of angular contact spherical bearings ensures that the tilt of the deflector is within the set range, preventing the wire rope from derailing due to excessive tilt angle, thus greatly reducing the probability of accidents caused by deflector tilt.

[0014] 3. The pin shaft was changed from a smooth shaft to a stepped shaft, the inner hole was changed to a stepped hole, and an angular contact spherical bearing structure was adopted to ensure that there is a firm axial positioning between the components and that no axial movement occurs.

[0015] 4. The pin shaft has tapered ends, which fits into the tapered holes of the counterweight frame, so that the entire anti-rope pulley assembly and the counterweight frame have a firm bearing positioning and no axial movement occurs.

[0016] 5. Bolts are used to fasten both ends of the pin shaft, which serves as a secondary axial fastening and protection function.

[0017] 6. Integrated installation: The pin shaft, rolling bearing, spherical bearing and bearing housing are assembled into a whole, which can realize the quick replacement of the in-use anti-corrosion pulley bearing assembly, improve the replacement efficiency, and at the same time ensure the installation accuracy.

[0018] 7. After the angular contact joint bearing is engaged, the large rotational torque can prompt the elevator traction system to protect itself, stop the elevator and prevent it from restarting / running normally again. Maintenance personnel can quickly locate the fault at the anti-rope sheave according to the fault code and replace and repair it in time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the anti-rope pulley of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the anti-rope pulley of the present invention; Figure 3 for Figure 1 The main view; Figure 4 for Figure 1 Side view; Figure 5 for Figure 1 Top view; Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0020] The components are: 1. Reverse rope wheel body, 2. Bearing housing, 3. Outer ring, 4. Inner ring, 5. Bolt, 6. Washer, 7. First rolling bearing, 8. Counterweight frame, 9. Pin, 10. Bushing, 11. Hole retaining ring, 12. Angle correction mechanism bracket, 13. Angle correction mechanism, 131. Second rolling bearing, 132. Bearing mounting plate, 133. Slider, 134. Linear module, 135. Servo motor, 14. Distance sensor, 15. Gap. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Please see Figures 1 to 6 This invention provides an embodiment: a highly redundant safety protection and self-correcting anti-cord pulley, comprising an anti-cord pulley body 1, a shaft pin, a counterweight frame 8, and a self-correcting mechanism. A bearing seat 2 is installed inside the anti-cord pulley body 1. The bearing seat 2 has a stepped hole structure that mates with the shaft pin. Two sets of first rolling bearings 7 are symmetrically installed in the middle of the bearing seat 2. The bearing seat 2 is mounted on the middle of the shaft pin via the first rolling bearings 7. Angular contact joint bearings are symmetrically installed in the space between both ends of the bearing seat 2 and the shaft shoulder of the shaft pin. The counterweight frame 8 is connected by bolts 5 and... The shim 6 is fixed to the end of the shaft pin. The self-correcting mechanism is set outside the counterweight frame 8 to correct the angular deviation of the anti-rope pulley. A distance sensor 14 is set outside the counterweight frame 8. The distance sensor 14 is located below the self-correcting mechanism 13. The angular contact spherical bearing includes an outer ring 3 and an inner ring 4. The inner ring 4 is set on the shoulder of the shaft pin. The outer ring 3 is set above the inner ring 4 and connected to the bearing seat 2. The upper surface of the outer ring 3 and the lower surface of the inner ring 4 are both arc surfaces. A gap 15 is provided between the outer ring 3 and the inner ring 4. This invention uses a self-correcting mechanism to correct the tilted anti-corrosion pulley, thus correcting the angular deviation of the pulley. When the distance sensor 14 detects an abnormal distance and the self-correcting mechanism fails, the angular contact joint bearing intervenes to ensure that the tilt of the anti-corrosion pulley is within a safe range. This prevents the wire rope from derailing due to excessive tilt, significantly reducing the probability of accidents caused by the anti-corrosion pulley's tilt. The spherical clearance 15 between the outer ring 3 and inner ring 4 of the angular contact joint bearing can be cleverly set according to the dimensions and fit of the wire rope and the rope groove. Figure 6As shown, this design prevents the wire rope from slipping out of the groove. The pin 9 is changed from a smooth shaft to a stepped shaft, and an angular contact spherical bearing structure is used to ensure secure axial positioning between components, preventing axial movement. The inner ring 4 of the angular contact spherical bearing is positioned via the shoulder of the pin 9. After the angular contact spherical bearing is introduced, the initial contact is line contact with high contact stress. Due to the rapid rotation of the anti-cord pulley, the initial wear of the angular contact spherical bearing is high, causing the line contact to change to surface contact. This increases the sliding friction on the sliding surface, increasing the normal rotation torque of the anti-cord pulley. The traction machine needs to continuously output a larger rotation torque. This large rotation torque can trigger the elevator traction system's self-protection mechanism, stopping the elevator and preventing it from restarting / running normally. Maintenance personnel can quickly locate the fault at the anti-cord pulley based on the fault code and replace or repair it promptly. The inner hole of the bearing housing 2 is changed to a stepped hole, allowing the outer ring 3 to be positioned through the stepped hole of the bearing housing 2. This, along with the pin 9 and other components, ensures secure axial positioning between components, preventing axial movement.

[0023] Please continue reading. Figure 2 As shown, in one embodiment of the present invention, the end of the pin 9 is provided with a conical surface, and the counterweight frame 8 is provided with a conical hole that mates with the conical surface. The counterweight pulley assembly is engaged and positioned with the counterweight frame 8 with the conical hole via the conical surface of the pin 9, and is locked by bolts 5, which serves to prevent axial movement and provide a fastening function.

[0024] Please continue reading. Figure 2 As shown, in one embodiment of the present invention, the two sets of first rolling bearings 7 are separated by a bushing 10, which is located at the middle position of the shaft pin. The bushing 10 also serves to position and separate the bearings. Please continue reading. Figure 2 As shown, in one embodiment of the present invention, the outer diameter of the bearing seat 2 and the inner hole of the reverse rope wheel body 1, the first rolling bearing 7 and the hole of the bearing seat 2 and the pin 9, and the angular contact spherical bearing and the hole of the bearing seat 2 and the pin 9 are all interference fits.

[0025] Please continue reading. Figure 2 As shown, in one embodiment of the present invention, a retaining ring 11 for positioning is provided on one side of the interior of the reverse rope pulley body 1 and on the outer side of the first and second hole surfaces of the bearing seat 2. The pin 9, rolling bearing, angular contact spherical bearing and bearing seat 2 assembly are installed in the inner hole of the reverse rope pulley body 1 and are axially positioned by the inner step and the retaining ring 11.

[0026] Please continue reading. Figure 1 , Figures 3 to 5As shown, in one embodiment of the present invention, the self-correcting mechanism includes an angle correction mechanism bracket 12 and an angle correction mechanism 13. The angle correction mechanism bracket 12 is fixed to the outside of the counterweight frame 8, and the angle correction mechanism 13 is mounted on the angle correction mechanism bracket 12. The angle correction mechanism 13 forms a certain angle α with the anti-corrosion wheel to correct the angular deviation of the anti-corrosion wheel body 1. A distance sensor 14 is used to detect the distance to the end face of the anti-corrosion wheel, and the angle correction mechanism 13 is used to perform correction measures based on the detection result of the distance sensor 14, such as... Figure 5 As shown, the purpose of setting angle a in this invention is that when the slider 133 of the linear module 134 is pushed in the direction A, because of the existence of angle a, the second bearing in the angle correction mechanism 13 presses on the end face of the anti-rope wheel to correct the angle deviation of the anti-rope wheel. Angle a can be adjusted according to the actual situation.

[0027] Please continue reading. Figure 1 , Figures 3 to 5 As shown, in one embodiment of the present invention, the angle correction mechanism 13 includes a servo motor 135, a second rolling bearing 131, a bearing mounting plate 132, and a linear module 134. The output end of the servo motor 135 is connected to the linear module 134. The slider 133 on the linear module 134 is fixed to the bearing mounting plate 132. The second rolling bearing 131 is disposed at the inner end of the bearing mounting plate 132. When the distance sensor 14 detects that the distance to the end face of the anti-roll wheel is inconsistent, it sends a signal to the servo motor 135. The servo motor 135, in cooperation with the linear module 134, converts the rotation of the motor into the forward and backward movement of the intermediate slider 133, precisely controlling the forward and backward movement position of the slider 133, thereby driving the bearing mounting plate 132 to move. The position of the second rolling bearing 131 on the bearing mounting plate 132 also changes with the slider 133, thereby changing the tilt angle of the anti-roll wheel and achieving the effect of correction. When the distance sensor 14 detects an abnormal distance and the self-correction mechanism does not work, the angular contact joint bearing intervenes for safety protection.

[0028] Please see Figures 1 to 5 The present invention provides an embodiment of a method for using a highly redundant safety protection and self-correcting anti-rope reel, comprising the following steps: Step S1: The anti-roll wheel works normally, with the first rolling bearing 7 providing rotation and load-bearing functions; Step S2: When the first rolling bearing 7 fails due to wear, cracks, or other reasons, the anti-roll wheel tilts. Step S3: The self-correcting mechanism corrects the tilted anti-roll rope wheel; Step S4: When the self-correcting mechanism fails, the spherical gap between the inner ring 4 and the outer ring 3 of the angular contact spherical bearing is eliminated, and the non-contact becomes contact. The angular contact spherical bearing then begins to perform rotation and load-bearing functions. The inner ring 4 and the outer ring 3 of the angular contact spherical bearing ensure that the tilt of the anti-rope pulley does not continue to increase, and ensure that the wire rope remains in the rope groove and does not detach from the rope groove, thereby playing a protective role.

[0029] Step S5: Initially, the angular contact spherical bearings are in line contact. When the inner ring 4 and outer ring 3 of the angular contact spherical bearings change from line contact to surface contact, the motor operating current increases. When the current reaches a set threshold, the system protection function is triggered, and the elevator stops running. Initially, the angular contact spherical bearings are in line contact, resulting in high contact stress. Due to the rapid rotation of the deflector, the initial wear of the angular contact spherical bearings is high, causing the line contact to change to surface contact. This increases the sliding friction on the sliding surface. Even if the normal rotation torque of the deflector increases, the traction machine needs to continuously output a larger torque to maintain a constant elevator speed. The motor operating current also increases accordingly. When the current reaches a set threshold, the system protection function is triggered, and the elevator stops running. The system protection function is existing elevator technology and will not be elaborated further here.

[0030] The present invention has the following working principle: First, the self-correcting mechanism can correct the tilted anti-corrosion sheave to correct the angle deviation of the anti-corrosion sheave. When the distance sensor 14 detects an abnormal distance and the self-correcting mechanism does not work, the angular contact joint bearing ensures that the tilt of the anti-corrosion sheave is within a safe range. The wire rope will not derail due to excessive tilt angle of the anti-corrosion sheave. After the angular contact joint bearing intervenes, the large rotational torque can prompt the elevator traction system to protect itself, stop the elevator and prevent it from restarting / running normally again. Maintenance personnel can quickly locate the fault at the anti-corrosion sheave according to the fault code and replace and repair it in time, which greatly reduces the probability of accidents caused by the tilt of the anti-corrosion sheave.

[0031] The above description is only a preferred embodiment of the present invention and should not be construed as a limitation of this application. All equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should be covered by the present invention.

Claims

1. A highly redundant safety protection and self-correcting anti-rope reel, characterized in that: The device includes a counterweight wheel body, a shaft pin, a counterweight frame, and a self-correcting mechanism. A bearing housing is installed inside the counterweight wheel body. The bearing housing has a stepped hole structure that mates with the shaft pin. Two sets of first rolling bearings are symmetrically installed in the middle of the bearing housing. The bearing housing is mounted on the middle of the shaft pin via the first rolling bearings. Angular contact bearings are symmetrically installed in the space between both ends of the bearing housing and the shoulders of the shaft pin. The counterweight frame is fixed to the end of the shaft pin by bolts and washers. The self-correcting mechanism is located outside the counterweight frame to correct the angular deviation of the counterweight wheel. A distance sensor is located outside the counterweight frame, below the self-correcting mechanism. The angular contact bearing includes an outer ring and an inner ring. The inner ring is located on the shoulder of the shaft pin, and the outer ring is located above the inner ring and connected to the bearing housing. The upper surface of the outer ring and the lower surface of the inner ring are both arc surfaces, and a gap is provided between the outer ring and the inner ring.

2. The high-redundancy safety protection and self-correcting anti-rope reel according to claim 1, characterized in that: The end of the pin is provided with a tapered surface, and the counterweight frame is provided with a tapered hole that mates with the tapered surface.

3. The high-redundancy safety protection and self-correcting anti-rope reel according to claim 1, characterized in that: The two sets of the first rolling bearings are separated by a bushing, which is located in the middle of the pin.

4. The high-redundancy safety protection and self-correcting anti-rope reel according to claim 1, characterized in that: The outer diameter of the bearing housing and the inner hole of the reverse rope wheel, the first rolling bearing and the bearing housing hole and pin, and the angular contact spherical bearing and the bearing housing hole and pin are all interference fits.

5. The high-redundancy safety protection and self-correcting anti-rope reel according to claim 1, characterized in that: A positioning retaining ring is provided on one side of the inner body of the anti-rope pulley and on the outer side of the first and second hole surfaces of the bearing seat.

6. The high-redundancy safety protection and self-correcting anti-rope reel according to claim 1, characterized in that: The self-correcting mechanism includes an angle correction mechanism bracket and an angle correction mechanism. The angle correction mechanism bracket is fixed to the outside of the counterweight frame, and the angle correction mechanism is installed on the angle correction mechanism bracket. The angle correction mechanism forms a certain angle α with the anti-rope wheel to correct the angle deviation of the anti-rope wheel body.

7. A high-redundancy safety protection and self-correcting anti-rope reel according to claim 6, characterized in that: The angle correction mechanism includes a servo motor, a second rolling bearing, a bearing mounting plate, and a linear module. The output end of the servo motor is connected to the linear module. The slider on the linear module is fixed to the bearing mounting plate. The second rolling bearing is provided at one inner end of the bearing mounting plate.

8. A method of using the high-redundancy safety protection and self-correcting anti-rope reel as described in claim 1, characterized in that, Includes the following steps: Step S1: The anti-roll wheel works normally, with the first rolling bearing providing rotation and load-bearing function; Step S2: When the first rolling bearing fails due to wear or cracks, the anti-roll wheel tilts. Step S3: The self-correcting mechanism corrects the tilted anti-roll rope wheel; Step S4: When the self-correcting mechanism fails, the spherical clearance between the inner and outer rings of the angular contact spherical bearing is eliminated, and the non-contact condition is changed to contact. The angular contact spherical bearing then begins to perform rotation and load-bearing functions. Step S5: The initial contact of the angular contact spherical bearing is line contact. When the inner and outer rings of the angular contact spherical bearing change from line contact to surface contact, the motor operating current increases. When the current reaches the set threshold, the system protection function is triggered, and the elevator stops running.

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