Traction machine simulation failure test device

Abstract

This invention provides a traction machine fault simulation test device, which, for existing traction machine operating conditions, provides testing personnel with a more effective testing scenario in the detection process, simulating brake spring torque decay and brake foreign object obstruction in an off-site manner. The traction machine fault simulation test device includes a brake arm displacement adjustment unit and a braking torque adjustment unit. The brake arm displacement adjustment unit includes a drive mechanism for rotating a rotating shaft that drives the manual release lever of the traction machine brake. The braking torque adjustment unit includes a horizontal linear guide rail parallel to the brake spring axis of the traction machine and a sliding seat mounted on the horizontal linear guide rail that can slide freely. A rotary motor and a first rotating component connected to the power output end of the rotary motor are mounted on the sliding seat. The first rotating component is coaxially arranged with the brake spring and can engage a reaction nut on the outside of the brake spring.

Description

Technical Field

[0001] This invention relates to a traction machine fault simulation test device, belonging to the field of special equipment testing technology. Background Technology

[0002] Elevators are a crucial piece of equipment in urban transportation. A significant proportion of elevator accidents result in injuries or fatalities due to the elevator itself, primarily caused by insufficient braking and traction force of the elevator traction machine. Therefore, ensuring elevator safety is essential for maintaining social safety and stability.

[0003] The brake of an elevator traction machine typically includes a brake arm, a magnet, and a brake spring. The brake arm has a brake block that, under the action of the brake spring, grips the traction sheave. When it is necessary to release the traction sheave, the magnet pushes the brake arm, creating a gap between the brake block and the traction sheave, allowing the traction sheave to rotate freely. At this time, the brake spring is compressed and stores energy. A manual release lever is installed on the magnet; slowly rotating this lever gradually moves the brake arm, causing the brake block to release the traction sheave. During long-term operation of the traction machine, the brake spring torque weakens, which can cause the brake arm to fail to grip the traction sheave. Furthermore, obstruction by foreign objects can also prevent the brake arm from moving smoothly under the action of the brake spring, causing traction machine malfunctions. These malfunctions can range from minor slippage of the car to car crashing or overshooting, ultimately leading to a safety accident.

[0004] Chinese patent document CN106986246A discloses a hardware-in-the-loop testing and fault diagnosis device for traction machines. This device uses a servo motor to dynamically load the traction machine based on simulated load signals, dynamically simulating faults to obtain fault signals from the traction machine and its control system. These signals are then transmitted to a control diagnostic system via a sensing unit. The control diagnostic system diagnoses the wear condition of the traction machine's brakes, thus achieving fault diagnosis. This device can achieve dynamic and realistic loading and fault diagnosis of the traction machine without requiring actual shafts and elevator door zones, facilitating the early detection of traction machine malfunctions under actual operating conditions for elevator safety and reliability assessment. However, this device lacks a comprehensive fault simulation mechanism for the internal structure and operating mechanism of the traction machine and cannot simulate conditions such as brake spring torque decay or brake obstruction by foreign objects. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a traction machine simulation fault test device, which provides a more effective test scenario for testing personnel in the testing process for existing traction machine operating conditions, and simulates the braking spring torque decay and brake foreign object jamming in the field.

[0006] To achieve the above objectives, the present invention provides a traction machine fault simulation test apparatus, comprising:

[0007] The brake arm displacement adjustment unit includes a drive mechanism for rotating the rotating shaft of the traction machine brake manual release lever;

[0008] The braking torque adjustment unit includes a horizontal linear guide rail arranged parallel to the axis of the brake spring of the traction machine and a sliding seat that can slide freely on the horizontal linear guide rail. A rotary motor and a first rotating component connected to the power output end of the rotary motor are arranged on the sliding seat. The first rotating component is arranged coaxially with the brake spring and can fasten the reaction nut on the outside of the brake spring.

[0009] The driving mechanism includes a pull rope assembly, a transmission rod, and a second rotating component; the pull rope of the pull rope assembly is connected to the transmission rod, the transmission rod is fixed to the second rotating component, and the second rotating component can fasten the rotating shaft.

[0010] The second rotating component includes a sleeve, the end of the rotating shaft can be inserted into the sleeve, and a clearance groove is provided at the end of the sleeve. When the end of the rotating shaft is inserted into the sleeve, the manual release lever connected to the rotating shaft can enter the clearance groove.

[0011] The pull rope assembly includes a motor screw drive device, which includes a drive motor, a screw connected to the power output end of the drive motor, a nut on the screw, and a slide fixed on the nut. The pull rope is connected to the slide.

[0012] The pull rope assembly also includes a pulley, around which the pull rope passes.

[0013] The second rotating component is mounted on a base plate via a bearing. The base plate is detachably fixed to a vertical plate. A through hole is provided on the vertical plate, through which the second rotating component passes. The base plate is fixed to the side of the vertical plate away from the rotation axis.

[0014] The drive mechanism includes a pull rope assembly, the pull rope of which is used to connect to the manual brake release lever.

[0015] The first rotating component includes a rotating rod, the end of which is provided with an inner hole that mates with the reaction nut.

[0016] The rotary motor is connected to the first rotating component via a worm gear mechanism.

[0017] The traction machine simulated fault test device also includes a frame, on which mounting positions for installing the traction machine are provided, and the brake arm displacement adjustment unit and the braking torque adjustment unit are disposed on the frame.

[0018] The horizontal linear guide rail is located above the motor lead screw drive device.

[0019] By adopting the above technical solution, the traction machine fault simulation test device of the present invention has the following advantages compared with the prior art:

[0020] 1. The manual release lever of the traction machine brake can rotate the rotating shaft, thereby forcibly opening the brake arm and adjusting the opening degree of the brake arm. Therefore, the rotation angle of the manual release lever of the traction machine brake can be adjusted by the braking torque adjustment unit in this invention. In the traction machine simulated fault test, the opening degree of the brake arm can be adjusted to simulate the different degrees of brake jamming caused by foreign objects, so as to test the operating data of the traction machine under different brake jamming states; avoiding the damage to the equipment itself and the safety hazards to personnel caused by using real foreign objects for jamming tests.

[0021] 2. The elastic force of the brake spring on the brake arm causes the brake arm to grip the traction sheave, while the end of the brake spring away from the brake arm applies a force to the reaction nut. The brake arm displacement adjustment unit in this invention can adjust the stroke position of the reaction nut, thereby extending the brake spring. This results in a reduction in the thrust provided by the brake spring to the brake arm, thus simulating the torque decay of the brake spring. Furthermore, the reaction nut can be precisely adjusted to different positions to simulate different degrees of torque decay of the brake spring, which can be used to measure the traction machine operating data under the state of brake spring torque decay.

[0022] 3. The sliding seat slides freely on the horizontal linear guide rail. Therefore, when the starting rotary motor drives the reaction nut to move outward through the first rotating component, the sliding seat and the first rotating component can move synchronously with the reaction nut without obstructing the reaction nut. Moreover, this follow-up structure is very simple and compact.

[0023] 4. The manual brake release lever can be rotated by pulling the rope directly, or the manual brake release lever can be rotated by pulling the transmission rod with the rope. The drive structure is relatively simple. The connection angle of the rope can be adaptively changed during the rotation of the manual brake release lever or the transmission rod. The rope pulley guides the rope, so the section of rope between the slide and the rope pulley can always maintain its orientation.

[0024] 5. The traction machine to be tested, the brake arm displacement adjustment unit, and the braking torque adjustment unit are all set on the frame, and the braking torque adjustment unit is located above the motor screw drive device of the brake arm displacement adjustment unit. This makes the overall structure of the traction machine simulation fault test device of the present invention compact and occupies a small area. It can simultaneously simulate the brake spring torque decay and the brake foreign object jamming of the traction machine. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a side view of the present invention.

[0027] Figure 3 This is a three-dimensional structural diagram of the brake arm displacement adjustment unit.

[0028] Figure 4 This is a side view of the brake arm displacement adjustment unit.

[0029] Figure 5 This is a schematic diagram of the connection structure between the transmission rod, the pull rope, and the second rotating component.

[0030] Figure 6 This is a schematic diagram of another implementation of the brake arm displacement adjustment unit.

[0031] Figure 7 This is a schematic diagram of the braking torque adjustment unit.

[0032] Figure 8 This is a system block diagram of the present invention. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 , 2 As shown, the traction machine simulation fault test device of the present invention includes a frame 1 and a brake arm displacement adjustment unit 2 and a braking torque adjustment unit 3 disposed on the frame 1. The frame 1 is provided with a mounting position for mounting a traction machine 4, and the traction machine 4 is fixedly mounted on the frame 1.

[0035] like Figure 3-5 As shown, the brake arm displacement adjustment unit 2 includes a drive mechanism for rotating the rotating shaft of the manual release lever 41 of the traction mechanism brake. Typically, the manual release lever 41 is vertically screwed into a screw hole on the rotating shaft.

[0036] In this embodiment, the driving mechanism includes a rope assembly 21, a transmission rod 22, and a second rotating component. The rope assembly 21 includes a motor screw drive device, which includes a drive motor 211, a screw 212 connected to the power output end of the drive motor 211, and a nut 213 disposed on the screw 212. A slide 214 is fixed on the nut 213, and the slide 214 is mounted on a slide rail 216 via a slider 215. A rope 217 is connected to the slide 214, and the rope 217 passes over a pulley 218 and is then connected to the transmission rod 22.

[0037] The second rotating component includes a sleeve 23, and the transmission rod 22 is fixed to the sleeve 23 via a connector 24. The connector 24 is provided with two slots for inserting the sleeve 23 and the transmission rod 22 respectively and locking them with bolts.

[0038] The end of the rotating shaft can be inserted into the sleeve 23. A relief groove 231 is provided at the end of the sleeve 23. When the end of the rotating shaft is inserted into the sleeve 23, the manual release lever 41 connected to the rotating shaft can enter the relief groove 231, so that the sleeve 23 can be fastened to the rotating shaft.

[0039] The brake arm displacement adjustment unit 2 of the above structure drives the lead screw 212 to rotate through the drive motor 211, thereby driving the nut 213 and the slide table 214 to move linearly and pull the pull rope 217. The pull rope 217 pulls the transmission rod 22 to rotate, thereby turning the manual brake release lever 41. Therefore, in the traction machine simulated fault test, it can simulate the foreign object jamming of the brake without using real foreign objects to jam it, and can accurately simulate the brake arm opening distance caused by foreign object jamming.

[0040] The sleeve 23 is mounted on a base plate 25 via bearings. The base plate 25 is detachably fixed to a vertical plate 26. A through hole 261 is provided on the vertical plate 26, through which the sleeve 23 passes. The base plate 25 is fixed to the side of the vertical plate 26 away from the rotating shaft. After the traction machine 4 is installed, the sleeve 23 can be fastened to the rotating shaft of the manual brake release lever 41, and then the base plate 25 is fixed to the vertical plate 26 with bolts.

[0041] In addition, in another implementation, such as Figure 6 As shown, the pull rope 217 can also be directly connected to the manual brake release lever 41, pulling the manual brake release lever 41 to drive the rotating shaft 411 to rotate. The drive structure is relatively simple: the pull rope 217 directly pulls the manual brake release lever 41 to rotate, or the pull rope 217 pulls the transmission rod 22 to drive the manual brake release lever 41 to rotate. The pull rope 217 can adaptively change its connection angle during the rotation of the manual brake release lever 41 or the transmission rod 22. Guided by the rope pulley 218, the section of pull rope 217 between the slide table 214 and the rope pulley 218 can always maintain its orientation. Of course, in other embodiments, transmission can also be achieved without the pull rope 217, but through a connecting rod hinged between the slide table 214 and the transmission rod 22 or the manual brake release lever 41, or by connecting the drive motor 211 to the rotating shaft via a coupling.

[0042] like Figure 1 , 2As shown in Figure 7, the braking torque adjustment unit 3 includes a horizontal linear guide rail 31 arranged parallel to the axis of the brake spring 42 of the traction machine 4 and a sliding seat 32 installed on the horizontal linear guide rail 31. The sliding seat 32 can slide freely on the horizontal linear guide rail 31 to move closer to or away from the traction machine 4.

[0043] A rotary motor 33 is mounted on the sliding seat 32. The rotary motor 33 is connected to a first rotating component via a worm gear mechanism 35. The first rotating component is coaxially aligned with the brake spring 42 and can engage the reaction nut 43 on the outside of the brake spring 42. In this embodiment, the first rotating component includes a rotating rod 34, the end of which has an inner hole 341 that mates with the reaction nut 43. Since the sliding seat 32 can slide freely on the horizontal linear guide rail 31, when the rotary motor 33 is started and the first rotating component drives the reaction nut 43 to move outward, the sliding seat 32 and the first rotating component can move synchronously with the reaction nut 43 without obstructing it. This follow-up structure is very simple and compact.

[0044] A support frame 30 is provided on the frame 1 and on the side of the motor lead screw 212 drive device. The horizontal linear guide rail 31 is provided on the support frame 30 and located above the motor lead screw 212 drive device, making the overall structure of the traction machine simulation fault test device of the present invention compact and occupying a small area.

[0045] like Figure 8 As shown, the traction machine simulation fault test device of the present invention also includes a control unit, which is connected to the drive motor 211 and the rotary motor 33. The drive motor 211 and the rotary motor 33 are both stepper motors, and their precise movements can be controlled by the control unit.

[0046] The working principle of the traction machine fault simulation test device of the present invention:

[0047] The programmable logic controller in the control unit simulates the normal / fault operation of the elevator. Taking the traction machine as the test object, the drive motor 211 is controlled by the control panel to turn the reaction nut 43 to correspond to the change in the braking spring torque. The vibration sensor set on the brake arm detects the fault signal of insufficient spring braking torque to verify whether the spring torque is in a failure state, thus forming an adaptive fault monitoring link.

[0048] By using the brake arm displacement adjustment unit 2 arranged on the outer side adjacent to the brake arm, the pull rope drives the transmission rod to control the manual brake release lever 41 to rotate based on the rotation of the lead screw of the drive motor 211, thereby simulating the fault state of brake arm jamming. A fault judgment and response mechanism is established based on the fault signal of brake jamming detected by the current sensor to verify in real time whether the brake arm is in a failure state, thus forming an adaptive fault monitoring link.

[0049] This invention offers stable and safe performance, with high device adjustment precision. It can monitor and control in real time, and the results are displayed on the control panel, making them clear and intuitive. Historical data is easy to retrieve and analyze, allowing for the judgment and analysis of equipment performance degradation trends, and enabling risk assessment and early warning in accordance with relevant regulations.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A hoisting machine simulation failure test device characterized by, include: The brake arm displacement adjustment unit includes a drive mechanism for rotating the rotating shaft of the traction machine brake manual release lever; The braking torque adjustment unit includes a horizontal linear guide rail arranged parallel to the brake spring axis of the traction machine and a sliding seat that slides freely on the horizontal linear guide rail. A rotary motor and a first rotating component connected to the power output end of the rotary motor are arranged on the sliding seat. The first rotating component is arranged coaxially with the brake spring and can fasten the reaction nut on the outside of the brake spring. The drive mechanism includes a pull rope assembly, a transmission rod, and a second rotating component; the pull rope of the pull rope assembly is connected to the transmission rod, the transmission rod is fixed to the second rotating component, and the second rotating component can fasten the rotating shaft; The second rotating component includes a sleeve, the end of the rotating shaft can be inserted into the sleeve, and a clearance groove is provided at the end of the sleeve. When the end of the rotating shaft is inserted into the sleeve, the manual release lever connected to the rotating shaft can enter the clearance groove. The pull rope assembly includes a motor screw drive device, which includes a drive motor, a screw connected to the power output end of the drive motor, a nut on the screw, and a slide fixed on the nut. The pull rope is connected to the slide.

2. The machine simulator test device according to claim 1, characterized in that: The pull rope assembly also includes a pulley, around which the pull rope passes.

3. The machine simulator test device of claim 1, wherein: The second rotating component is mounted on a base plate via a bearing. The base plate is separately fixed to a vertical plate. A through hole is provided on the vertical plate, through which the second rotating component passes. The base plate is fixed to the side of the vertical plate away from the rotating axis.

4. The machine simulator test device of claim 1, wherein: The drive mechanism includes a pull rope assembly, the pull rope of which is used to connect to the manual brake release lever.

5. The machine simulator testing device according to any one of claims 1 to 4, characterized in that: The first rotating component includes a rotating rod, the end of which is provided with an inner hole that mates with the reaction nut.

6. The traction machine simulated fault test device as described in any one of claims 1-4, characterized in that: The traction machine simulated fault test device also includes a frame, on which mounting positions for installing the traction machine are provided, and the brake arm displacement adjustment unit and the braking torque adjustment unit are disposed on the frame.

7. The machine simulator test device according to claim 6, wherein: The horizontal linear guide rail is located above the motor lead screw drive device.

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