Testing device for rotary centrifugal speed governor

Abstract

The utility model discloses a rotary centrifugal speed governor testing device which comprises an L-shaped support arranged on a centrifugal speed governor testing stand, the L-shaped support is provided with an assembling hole used for installing a centrifugal speed governor body, the lower portion of the L-shaped support is provided with a lifting adjusting mechanism, the top of the lifting adjusting mechanism is provided with a first platform, and the first platform is provided with a second platform. According to the centrifugal speed limiter testing device, the speed limiter wheel of the centrifugal speed limiter body is connected with the sectional type transmission component through the triangular belt, the lifting adjusting mechanism is controlled to act, and the sectional type transmission component is moved downwards, so that the triangular belt is tensioned; after adjustment is in place, the servo driving assembly is started through the control panel, the servo driving assembly is used for driving the sectional type transmission component to rotate, rotation control over the speed limiter wheel is further achieved in cooperation with the triangular belt, integration is high, universality is good, and the centrifugal speed limiter performance test device can be suitable for performance tests of centrifugal speed limiters of different models.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal speed governor testing, in particular to a rotary centrifugal speed governor testing device. Background Art

[0002] Centrifugal speed governors for hoists are a crucial safety feature of overhead working baskets. As a core component in the safety protection system of cage hoists used in mines, they play a crucial role. During hoist operation, if a dangerous situation such as overspeed or a fall occurs and other safety devices are ineffective, the speed governor quickly engages the safety clamp to ensure the cage comes to a safe stop. Its operating principle is to monitor the cage speed in real time. When the speed exceeds 115% of the rated value, the speed governor immediately sends a signal and triggers a mechanical action, disconnecting the power supply circuit and braking the traction mechanism. Therefore, centrifugal speed governors must undergo necessary performance testing before shipment. In existing technology, the drive portion of a speed governor test device uses a drive motor to drive a drive wheel. The drive wheel is then placed on the speed governor wheel to accelerate the speed governor wheel. However, some speed governors have very little exposed portion of the speed governor wheel, making it difficult to place the drive wheel and detection wheel on the wheel, making testing impossible. In light of this, in-depth research into this issue led to the present case. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a rotary centrifugal speed governor test device, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rotary centrifugal speed governor test device, comprising an L-shaped bracket arranged on a centrifugal speed governor test bench, the L-shaped bracket being provided with an assembly hole for installing a centrifugal speed governor body, a lifting adjustment mechanism being provided at the lower part of the L-shaped bracket, a first platform being provided at the top of the lifting adjustment mechanism, a horizontal adjustment mechanism being installed on the first platform, a second platform being provided on the movable end of the horizontal adjustment mechanism, a servo drive assembly being provided on the second platform, the output end of the servo drive assembly being connected to a segmented transmission component, the segmented transmission component being connected to the speed governor wheel of the centrifugal speed governor body by a V-belt, a main control box and a control panel being provided on the front side of the servo drive assembly, a rotary encoder being provided at one end of the segmented transmission component, and the rotary encoder, the servo drive assembly, and the electrical switches on the centrifugal speed governor body being all connected to the controller in the main control box.

[0005] The above-mentioned segmented transmission component includes a support, a fixed shaft and several driving wheels. The support is arranged on the second platform. The fixed shaft is rotatably arranged on the support and one end is connected to the servo drive assembly. The several driving wheels are fixedly sleeved on the fixed shaft in sequence.

[0006] The outer diameter of the driving wheel is reduced in sequence to match speed governor wheels of different sizes.

[0007] The above-mentioned lifting and adjusting mechanism includes a hydraulic cylinder, a guide sleeve and a guide column. The hydraulic cylinder is arranged on the test bench in the vertical direction and the telescopic end is connected to the lower end surface of the first platform. The guide sleeve is symmetrically arranged at the four corners of the hydraulic cylinder. The guide column is slidably inserted in the guide sleeve and the upper end is connected to the first platform.

[0008] The above-mentioned horizontal adjustment mechanism includes a screw module, a guide rail and a slider. The screw module is arranged on the first platform and the moving end is connected to the second platform. The guide rail is symmetrically arranged on both sides of the screw module. The slider is slidably mounted on the guide rail and fixedly connected to the lower end surface of the second platform.

[0009] The servo drive assembly includes a servo motor, the output end of the servo motor is connected to the fixed shaft through a coupling, and the servo motor is connected to the controller in the main control box through a frequency conversion controller.

[0010] The utility model provides a rotary centrifugal speed limiter test device. It has the following beneficial effects: the centrifugal speed limiter body to be tested is installed on the L-shaped bracket, the horizontal adjustment mechanism is controlled to make the segmented transmission component and the speed limiter wheel of the centrifugal speed limiter body of the same diameter be located on the same vertical axis, the speed limiter wheel of the centrifugal speed limiter body is connected to the segmented transmission component through a V-belt, the lifting adjustment mechanism is controlled to move the segmented transmission component downward, thereby tightening the V-belt; after the adjustment is in place, the servo drive component is started through the control panel, and the servo drive component is used to drive the segmented transmission component to rotate, and then the V-belt is cooperated to realize the rotation control of the speed limiter wheel. Since the selected segmented transmission component diameter is consistent with the speed limiter wheel diameter, Therefore, the rotation speeds of the two are the same during the test; the centrifugal hammer on the speed limiter is continuously thrown outward under the action of centrifugal force. When the contact on the centrifugal hammer contacts the electrical switch, the electrical switch is triggered and disconnected, and the rotary encoder records the current speed; the servo drive component is controlled to continue to accelerate. When the centrifugal hammer triggers the pawl lock tongue, the pawl pops out downward and is locked in the ratchet position of the centrifugal speed limiter body, braking the speed limiter wheel. At this time, the value recorded by the main rotary encoder is the maximum speed limit; after shutdown, the electrical switch and the pawl lock tongue are reset, and the above operation is repeated until the test number requirement is met; the device has high integration and good versatility, and can be applied to performance tests of centrifugal speed limiters of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the rotary centrifugal speed governor test device of the present invention.

[0012] Figure 2This is a side structural schematic diagram of the rotary centrifugal speed governor test device of the present invention.

[0013] In the figure: 1. L-shaped bracket; 2. Centrifugal speed governor body; 3. First platform; 4. Second platform; 5. V-belt; 6. Main control box; 7. Control panel; 8. Rotary encoder; 9. Support; 10. Fixed shaft; 11. Driving wheel; 12. Hydraulic cylinder; 13. Guide sleeve; 14. Guide column; 15. Screw module; 16. Guide rail; 17. Slider; 18. Servo motor. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] Example: In conjunction with the specification Figure 1-2It can be seen that the present application specifically designs a rotary centrifugal speed governor test device, comprising an L-shaped bracket 1 arranged on a centrifugal speed governor test bench, the L-shaped bracket 1 being provided with an assembly hole for mounting a centrifugal speed governor body 2, a lifting adjustment mechanism being provided at the lower portion of the L-shaped bracket 1, a first platform 3 being provided at the top of the lifting adjustment mechanism, a horizontal adjustment mechanism being installed on the first platform 3, a second platform 4 being provided on the movable end of the horizontal adjustment mechanism, a servo drive assembly being provided on the second platform 4, the output end of the servo drive assembly being connected to a segmented transmission component, and the segmented transmission component The speed governor wheel of the centrifugal speed governor body 2 is connected to the centrifugal speed governor body 2 through a V-belt 5. A main control box 6 and a control panel 7 are provided on the front side of the servo drive assembly. A rotary encoder 8 is provided at one end of the segmented transmission component. The rotary encoder 8, the servo drive assembly, and the electrical switches on the centrifugal speed governor body 2 are all connected to the controller in the main control box 6. When in use, the centrifugal speed governor body 2 to be tested is installed on the L-shaped bracket 1, and the horizontal adjustment mechanism is controlled to operate so that the segmented transmission component with the same diameter and the speed governor wheel of the centrifugal speed governor body 2 are located on the same vertical axis. The angle belt 5 connects the speed governor wheel of the centrifugal speed governor body 2 with the segmented transmission component, controls the action of the lifting and lowering adjustment mechanism, and moves the segmented transmission component downward, thereby tightening the V-belt 5; after the adjustment is in place, the servo drive component is started through the control panel 7, and the servo drive component is used to drive the segmented transmission component to rotate, and then cooperates with the V-belt 5 to realize the rotation control of the speed governor wheel. Since the diameter of the selected segmented transmission component is consistent with the diameter of the speed governor wheel, the rotation speed of the two is the same during the test; the centrifugal hammer on the speed governor is continuously thrown outward under the action of centrifugal force, When the contact on the centrifugal hammer contacts the electrical switch, the electrical switch is triggered to disconnect, and the rotary encoder 8 records the current speed; the servo drive assembly is controlled to continue to accelerate, and when the centrifugal hammer triggers the pawl lock tongue, the pawl pops out downward and snaps into the ratchet position of the centrifugal speed governor body 2, braking the speed governor wheel. At this time, the value recorded by the main rotary encoder 8 is the maximum speed limit; after shutdown, the electrical switch and the pawl lock tongue are reset, and the above operation is repeated until the test number requirement is met; the device has high integration and good versatility, and can be applied to performance tests of centrifugal speed governors of different models.

[0016] During the specific implementation process, as a preferred setting, the above-mentioned segmented transmission component includes a support 9, a fixed shaft 10 and a plurality of driving wheels 11. The support 9 is arranged on the second platform 4, the fixed shaft 10 is rotatably set on the support 9 and one end is connected to the servo drive assembly, and the plurality of driving wheels 11 are fixedly mounted on the fixed shaft 10 in sequence, wherein the outer diameters of the plurality of driving wheels 11 are reduced in sequence to match speed limiter wheels of different sizes. Drive wheels 11 of different outer diameters can match speed limiter wheels of different sizes. The test operator can select according to actual conditions so that the rotational speed of the driving wheel 11 is consistent with that of the speed limiter wheel, so as to facilitate accurate acquisition of test data.

[0017] In the specific implementation process, as a preferred setting, the above-mentioned lifting and adjusting mechanism includes a hydraulic cylinder 12, a guide sleeve 13 and a guide column 14. The hydraulic cylinder 12 is arranged on the test bench in the vertical direction and the telescopic end is connected to the lower end face of the first platform 3. The guide sleeve 13 is symmetrically arranged in the four corners of the hydraulic cylinder 12. The guide column 14 is slidably inserted in the guide sleeve 13 and the upper end is connected to the first platform 3. The above-mentioned horizontal adjustment mechanism includes a screw module 15, a guide rail 16 and a slider 17. The screw module 15 is arranged on the first platform 3 and the moving end is connected to the second platform 4. The guide rails 16 are symmetrically arranged on both sides of the screw module 15. The slider 17 is slidably sleeved on the guide rail 16 and fixedly connected to the lower end face of the second platform 4. When in use, first according to the speed limit to be tested The size of the speed limiter wheel is selected, and the driving wheel 11 that is consistent with the outer diameter is selected. Specifically, the second platform 4 can be adjusted in the horizontal direction through the screw module 15, so that the selected driving wheel 11 and the speed limiter wheel are located on the same vertical axis position, and the hydraulic cylinder 12 is controlled to expand. After the first platform 3 is pushed to a certain height under the limiting action of the guide column 14, the upper and lower ends of the V-belt 5 are respectively fitted onto the speed limiter wheel and the driving wheel 11, and the telescopic end of the hydraulic cylinder 12 is controlled to be recovered, and then the driving wheel 11 is moved downward, and the V-belt 5 is tightened. The whole process is electrically controlled, which can greatly improve the test efficiency. Similarly, after the test is completed, the telescopic end of the hydraulic cylinder 12 can be controlled to expand, so that the driving wheel 11 moves upward, and the V-belt 5 is loosened accordingly, which facilitates the removal of the V-belt 5.

[0018] In the specific implementation process, as a preferred setting, the above-mentioned servo drive component includes a servo motor 18, the output end of the servo motor 18 is connected to the fixed shaft 10 through a coupling, and the servo motor 18 is connected to the controller in the main control box 6 through a frequency conversion controller. Using the servo motor 18 as the power source and cooperating with the frequency conversion controller can achieve stable control of the output speed and improve the accuracy of the test data.

[0019] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary centrifugal speed governor test device, comprising an L-shaped bracket arranged on a centrifugal speed governor test bench, characterized in that: The L-shaped bracket is provided with an assembly hole for installing the centrifugal speed limiter body, the lower part of the L-shaped bracket is provided with a lifting adjustment mechanism, the top of the lifting adjustment mechanism is provided with a first platform, the first platform is provided with a horizontal adjustment mechanism, the movable end of the horizontal adjustment mechanism is provided with a second platform, the second platform is provided with a servo drive assembly, the output end of the servo drive assembly is connected with a segmented transmission component, the segmented transmission component is connected to the speed limiter wheel of the centrifugal speed limiter body through a V-belt, the front side of the servo drive assembly is provided with a main control box and a control panel, one end of the segmented transmission component is provided with a rotary encoder, the rotary encoder, the servo drive assembly, and the electrical switches on the centrifugal speed limiter body are all connected to the controller in the main control box.

2. The rotary centrifugal speed governor test device according to claim 1, characterized in that: The segmented transmission component includes a support, a fixed shaft and several driving wheels. The support is arranged on the second platform. The fixed shaft is rotatably arranged on the support and one end is connected to the servo drive assembly. The several driving wheels are fixedly sleeved on the fixed shaft in sequence.

3. The rotary centrifugal speed governor test device according to claim 2, characterized in that: The outer diameters of the plurality of driving wheels are successively reduced to match speed governor wheels of different sizes.

4. The rotary centrifugal speed governor test device according to claim 1, characterized in that: The lifting and adjusting mechanism includes a hydraulic cylinder, a guide sleeve and a guide column. The hydraulic cylinder is arranged on the test bench in the vertical direction and the telescopic end is connected to the lower end surface of the first platform. The guide sleeve is symmetrically arranged at the four corners of the hydraulic cylinder. The guide column is slidably inserted in the guide sleeve and the upper end is connected to the first platform.

5. The rotary centrifugal speed governor test device according to claim 1, characterized in that: The horizontal adjustment mechanism includes a screw module, a guide rail and a slider. The screw module is arranged on the first platform and the moving end is connected to the second platform. The guide rail is symmetrically arranged on both sides of the screw module. The slider is slidably mounted on the guide rail and fixedly connected to the lower end surface of the second platform.

6. The rotary centrifugal speed governor test device according to claim 2, characterized in that: The servo drive assembly includes a servo motor, an output end of the servo motor is connected to a fixed shaft via a coupling, and the servo motor is connected to a controller in a main control box via a frequency conversion controller.

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