A device and method for measuring the pitch circle diameter of a speed limiter pulley.

Abstract

This invention discloses a device and method for measuring the pitch circle diameter of a speed governor rope pulley, belonging to the field of special equipment inspection technology. It includes a control host, a base, and a drive wheel assembly, a measuring wheel assembly, and a first sensor assembly located on the base. The first sensor assembly is used to acquire the rotational angular velocity of the speed governor rope pulley. The drive wheel assembly includes a first support, a first bracket, a motor assembly, and a drive wheel. The drive wheel rotates through the motor assembly, driving the speed governor rope pulley to rotate. The measuring wheel assembly includes a second support, a second bracket, a measuring wheel, and a second sensor assembly located on the measuring wheel. The second sensor assembly is used to acquire the rotational angular velocity of the measuring wheel. The measuring wheel is in contact with the groove of the speed governor rope pulley, and a preload is applied by the second bracket to prevent relative slippage. Both the drive wheel assembly and the measuring wheel assembly are equipped with a clamping component. This invention enables inspection under confined space conditions of the speed governor and can conveniently obtain the pitch circle diameter of the speed governor rope pulley.

Description

Technical Field

[0001] This invention belongs to the field of special equipment testing technology, and in particular relates to a device and method for measuring the pitch circle diameter of a speed limiter rope pulley. Background Technology

[0002] Speed ​​governors are essential safety protection devices for many special equipment, such as simple lifts and elevators. Ensuring the speed governor's operating speed meets requirements is crucial for elevator safety. To determine if the speed governor's operating speed meets the requirements, its operating speed needs to be verified. The pitch circle diameter of the speed governor is a necessary parameter for this verification. Current speed governor testing methods suffer from limitations such as confined space, inconvenience in measuring the pitch circle diameter of the speed governor's rope pulley, and slippage of the contact pulley during testing due to the lack of a clamping structure, leading to low measurement accuracy. Existing measurement methods, including the rope groove diameter measurement method and the rope groove circumference-to-diameter conversion method, all require manual calculation, making the entire measurement process complex and prone to significant errors and inconvenience.

[0003] Based on the above problems, the inventors have proposed a speed limiter rope pulley pitch circle diameter measuring device and method that can meet the requirements, achieving fast, convenient and accurate measurement. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for measuring the pitch circle diameter of a speed limiter rope pulley, so as to solve the problems existing in the background art.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A device for measuring the pitch circle diameter of a speed limiter sheave includes a control host, a base, and a drive wheel assembly, a measuring wheel assembly, and a first sensor assembly located on the base. The first sensor assembly is used to acquire the rotational angular velocity of the speed limiter sheave. The base is located on the base of the speed limiter and on one side of the speed limiter sheave. One end of the base of the first sensor assembly is located on the base, and the detection end of the first sensor assembly is located on one side of the speed limiter sheave and is used to acquire the rotational angular velocity of the speed limiter sheave.

[0007] The drive wheel assembly includes a first support, a first bracket, a motor assembly, and a drive wheel. The first support is hinged to the bottom of the first bracket. The drive wheel rotates through the motor assembly and drives the speed limiter rope wheel to rotate.

[0008] The measuring wheel assembly includes a second support, a second bracket, a measuring wheel, and a second sensor assembly located on the measuring wheel. The second sensor assembly is used to acquire the rotational angular velocity of the measuring wheel. The second support is hinged to the bottom of the second bracket. The measuring wheel is fitted with the groove of the speed limiter rope wheel. A preload is applied by the second bracket to prevent relative slippage.

[0009] Both the drive wheel assembly and the measuring wheel assembly are equipped with clamping components.

[0010] Furthermore, the two clamping assemblies are respectively located in the first support and the second support. The clamping assembly includes a spring and a worm gear lifting assembly. One end of the worm in the worm gear lifting assembly is provided with an adjustment knob that extends out of the corresponding support. One end of the spring is fixed to the top of the lead screw of the worm gear lifting assembly. The spring moves up and down through the worm gear lifting assembly. The spring extends out of the corresponding support and abuts against the bottom of the corresponding bracket.

[0011] Furthermore, the first support is fixedly connected to the base, the second support is slidably connected to the base, a slide rail is provided between the second support and the base, and a lead screw adjusting rod is provided at the bottom of the second support.

[0012] Furthermore, the second bracket includes an upper bracket and a lower bracket, the lower bracket is inserted into the upper bracket and slidably connected to the upper bracket, and the portion of the upper bracket corresponding to the lower bracket is provided with a locking knob.

[0013] Furthermore, the hinge shafts of the first bracket and the first support, and the hinge shafts of the second bracket and the second support are respectively located on the side close to the speed limiter pulley, and the two clamping components are respectively located on the outside of the corresponding hinge shafts.

[0014] Furthermore, the rim cross-section of the measuring wheel is a convex circular arc, the rim curvature of the measuring wheel is smaller than the inner edge curvature of the groove of the speed limiter rope wheel, the center of the rim of the measuring wheel contacts the groove of the speed limiter rope wheel, and the outer side of the rim of the measuring wheel does not contact the groove of the speed limiter rope wheel.

[0015] Furthermore, the measuring wheel is rotatably connected to the upper support, and multiple pressure sensors are arranged in a circular array on the outer circumference of the center plane of the measuring wheel.

[0016] Furthermore, the control host is electrically connected to the motor assembly, the first sensor assembly, the second sensor assembly, and the pressure sensor.

[0017] Furthermore, the base is equipped with an electromagnetic knob, and the base is detachably connected to the base of the speed limiter via the electromagnetic knob.

[0018] A method for measuring the pitch circle diameter of a speed limiter pulley includes the following steps:

[0019] S1: The speed limiter is shut down and the power is cut off. Remove the wire rope and brake assembly from the speed limiter pulley to make room for the installation of the measuring device.

[0020] S2: Adjust the position of the first bracket, including deflecting the first bracket away from the speed limiter rope wheel around the hinge axis at the bottom, adjusting the position of the base so that the drive wheel does not interfere with the speed limiter rope wheel, and continuing to adjust the first bracket to rotate in the opposite direction around the hinge axis so that the drive wheel and the outer edge of the speed limiter rope wheel are aligned and in contact.

[0021] S3: Adjust the second bracket and the second support, including adjusting the position of the second support along the left and right sides of the base, deflecting the lower bracket away from the speed limiter rope wheel along the hinge axis at the bottom, adjusting the position of the upper bracket and the lower bracket so that the outer edge center of the measuring wheel contacts the bottom of the groove of the speed limiter rope wheel, and locking the position of the second support and the upper bracket.

[0022] S4: Adjust the clamping assembly to ensure that both the drive wheel and the measuring wheel are effectively pressed against the speed limiter rope wheel;

[0023] S5: Place the sensing element of the first sensor assembly outside the speed limiter pulley; place the measuring head base of the first sensor assembly on the base, so that the measuring head is aligned with the sensing element;

[0024] S6: Predicted quantity. Start the motor assembly to drive the drive wheel to rotate, which in turn drives the speed limiter rope wheel to rotate. The speed limiter rope wheel then drives the measuring wheel to rotate. Observe whether the indicator lights on the pressure sensors on the measuring wheel and their corresponding positions on the upper bracket are all lit to determine whether the measuring wheel is installed accurately.

[0025] S7: Formal measurement begins. The drive wheel is started, and after the speed of the drive wheel stabilizes, the control host records the measurement data of the first sensor assembly and the second sensor assembly.

[0026] S8: Calculate the pitch circle diameter of the speed limiter sheave. Based on the contact between the bottom of the groove of the driving wheel and the measuring wheel and the slip-free transmission to ensure that the linear velocities at the contact points of the two wheels are the same, the rotational angular velocities of the measuring wheel and the speed limiter sheave are obtained. The radius of the measuring wheel is known, and then the radius of the bottom of the groove of the speed limiter sheave can be obtained. The radius of the bottom of the groove of the speed limiter sheave is converted into a diameter, and then the diameter of the wire rope is input. The pitch circle diameter of the speed limiter sheave is obtained by adding the bottom diameter of the groove of the speed limiter sheave to the diameter of the wire rope.

[0027] The beneficial effects of this invention are:

[0028] 1) The measuring device includes a control host, a base, and a drive wheel assembly, a measuring wheel assembly, and a first sensor assembly located on the base. The overall structure is compact and can detect the pitch circle diameter of the speed limiter rope wheel under the condition of limited space in the speed limiter.

[0029] 2) The first bracket, the first support, and the clamping assembly are used to adjust the drive wheel so that the drive wheel abuts against the outer edge of the speed limiter rope wheel. The motor assembly drives the drive wheel to rotate, which in turn drives the speed limiter rope wheel to rotate, achieving contact between the drive wheel and the speed limiter rope wheel and enabling slip-free transmission. The second bracket, the second support, and the clamping assembly are used to adjust the measuring wheel so that the measuring wheel abuts against the outer edge of the speed limiter rope wheel. The speed limiter rope wheel rotates, which in turn drives the measuring wheel to rotate. The spring provides preload pressure, which can prevent slippage between the drive wheel and the measuring wheel during the measurement process and ensure the accuracy of the measurement results.

[0030] 3) By measuring the angular velocities of the two wheels and knowing the radius of the measuring wheel, the radius of the groove in the speed limiter rope wheel can be obtained, and then the diameter of the groove in the speed limiter rope wheel can be obtained. Since the diameter of the wire rope is also known, the pitch circle diameter of the speed limiter rope wheel can be obtained. The whole measurement process is fast and convenient. The detection and data collection can be automatically completed by the control host, which improves the measurement efficiency. Attached Figure Description

[0031] Figure 1 This is a perspective view of a speed limiter rope pulley pitch circle diameter measuring device according to the present invention;

[0032] Figure 2 This is a schematic diagram of the speed limiter rope pulley pitch circle diameter measuring device of the present invention during the adjustment stage;

[0033] Figure 3 This is a schematic diagram of the speed limiter rope pulley pitch circle diameter measuring device of the present invention during the measurement stage;

[0034] Figure 4 This is a schematic diagram of the clamping component in this invention;

[0035] Figure 5 This is a schematic diagram of the second support and the lead screw adjusting rod in this invention;

[0036] Figure 6 This is a top view of a speed limiter rope pulley pitch circle diameter measuring device according to the present invention;

[0037] Figure 7 This is a schematic cross-sectional view of the measuring wheel and the speed limiter rope wheel in this invention;

[0038] Figure 8 This is a schematic diagram of the measuring wheel in this invention;

[0039] In the diagram, 1-speed limiter, 11-speed limiter pulley, 2-drive pulley assembly, 21-drive pulley, 22-motor assembly, 23-first bracket, 231-motor mounting sleeve, 24-first support, 3-measuring wheel assembly, 31-measuring wheel, 311-pressure sensor, 312-second sensor assembly, 32-second bracket, 321-upper bracket, 322-lower bracket, 323-locking knob, 324-indicator light, 33-second support, 4-control host, 5-first sensor assembly, 6-base, 61-electromagnetic knob, 7-worm gear lifting assembly, 71-spring, 72-adjusting knob, 8-lead screw adjusting rod. Detailed Implementation

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] like Figures 1-8 As shown, a device for measuring the pitch circle diameter of a speed limiter rope pulley includes a control host 4, a base 6, and a drive wheel assembly 2, a measuring wheel assembly 3, and a first sensor assembly 5 located on the base 6. The base 6 is located on the base of the speed limiter 1 and on one side of the speed limiter rope pulley 11. The drive wheel assembly 2 includes a first support 24, a first bracket 23, a motor assembly 22, and a drive wheel 21. The first support 24 is hinged to the bottom of the first bracket 23. The drive wheel 21 rotates through the motor assembly 22 and drives the speed limiter rope pulley 11 to rotate. The drive wheel 21 is cylindrical and presses against the edges on both sides of the speed limiter rope pulley 11, driving the speed limiter rope pulley 11 to rotate by friction. The measuring wheel assembly 3 includes a second support 33, a second bracket 32, a measuring wheel 31, and a second sensor assembly 312 located on the measuring wheel 31. The second support 33 is hinged to the bottom of the second bracket 32. The measuring wheel 31 abuts against the groove of the speed limiter rope pulley 11 through the second bracket 32. Both the drive wheel assembly 2 and the measuring wheel assembly 3 are equipped with a clamping assembly.

[0043] Among them, such as Figure 1 and Figure 2 As shown, the hinge structure of the first bracket 23 and the second bracket 32 ​​adopts an inner hinge and an outer spring 71 for the clamping component. This is to facilitate the first bracket 23 and the second bracket 32 ​​to deflect outward first, and then leave room for adjustment. After adjustment, the amount of spring 71 is adjusted to adjust and press against the speed limiter rope wheel 11.

[0044] Through the above technical solution, the first bracket 23, the first support 24 and the tightening assembly are used to adjust the drive wheel 21 so that the drive wheel 21 abuts against the outer edge of the speed limiter rope wheel 11. The motor assembly 22 drives the drive wheel 21 to rotate, which in turn drives the speed limiter rope wheel 11 to rotate, so that the drive wheel 21 contacts the speed limiter rope wheel 11 and performs non-slip transmission. The spring 71 provides pre-tightening pressure.

[0045] The second bracket 32, the second support 33, and the clamping assembly are used to adjust the measuring wheel 31 so that the measuring wheel 31 is in contact with the outer edge of the speed limiter rope wheel 11. The speed limiter rope wheel 11 rotates, thereby driving the measuring wheel 31 to rotate, so that the driving wheel 21 contacts the speed limiter rope wheel 11 and performs non-slip transmission.

[0046] During the rotation of the drive wheel 21, the speed limiter rope wheel 11 and the measuring wheel 31, the first sensor assembly 5 is used to measure the rotational angular velocity of the speed limiter rope wheel 11, and the second sensor assembly 312 is used to detect the rotational angular velocity of the measuring wheel 31.

[0047] The measurement principle of this device is as follows:

[0048] When two wheels with different radii come into contact and perform a non-slip transmission, the linear velocities at the contact points of the two wheels are the same. The linear velocity is equal to the radius multiplied by the angular velocity. Since the two wheels have different radii but the same linear velocity, the angular velocity is inversely proportional to the radius.

[0049] ;

[0050] ;

[0051] or ;

[0052] Where R is the radius of the bottom of the groove of the speed limiter rope pulley 11, and r is the radius of the measuring wheel 31. That is, the angle through which the speed limiter pulley 11 rotates. The angle through which the measuring wheel 31 rotates is given, where D is the diameter of the bottom of the groove of the speed limiter rope wheel 11, and d is the diameter of the measuring wheel 31.

[0053] The angular velocities of the two wheels are obtained by measurement. Angle and angular velocity can be converted to each other. Angular velocity ( ) is the change in angle ( ) and time change ( The ratio of ), i.e. Given the radius r of the measuring wheel 31, we can obtain the radius R of the bottom of the groove of the speed limiter rope wheel 11, and then obtain the diameter D of the bottom of the groove of the speed limiter rope wheel 11. Given the diameter d1 of the wire rope, we can finally obtain the pitch circle diameter D1 of the speed limiter rope wheel 11, where D1 = D + d1.

[0054] Simultaneously, the test result is the ratio of the errors in the angular velocities of the two wheels, thus reducing the order of magnitude of the error. The test result is relatively accurate, and the number of test parameters is small, making counting convenient and facilitating convenient automatic testing and reading.

[0055] Furthermore, such as Figure 1 and Figure 4 As shown, the two clamping components are located in the first support 24 and the second support 33 respectively. The clamping component includes a spring 71 and a worm gear lifting assembly 7. One end of the worm in the worm gear lifting assembly 7 is provided with an adjustment knob 72 that extends out of the corresponding support. One end of the spring 71 is fixed to the top of the lead screw of the worm gear lifting assembly 7. The spring 71 moves up and down through the worm gear lifting assembly 7. The spring 71 extends out of the corresponding support and abuts against the bottom of the corresponding bracket.

[0056] The hinge shafts of the first bracket 23 and the first support 24, and the hinge shafts of the second bracket 32 ​​and the second support 33 are located on the side close to the speed limiter pulley 11, and the two clamping components are located on the outside of the corresponding hinge shafts.

[0057] Through the above technical solution, rotating the adjustment knob 72 rotates the worm gear of the worm gear lifting assembly 7, which in turn drives the vertical lead screw to move up and down through the transmission relationship. Since the spring 71 is fixed on the lead screw, the spring 71 can move up and down. Since the bottom of the first support 24 is hinged to the bottom of the first bracket 23, and the bottom of the second support 33 and the second bracket 32 ​​are hinged, the spring 71 is located on the other side of the hinge point between the support and the bracket. The bracket angle can be adjusted by lifting the spring 71, thereby enabling the drive wheel 21 or the measuring wheel 31 to press against the speed limiter rope wheel 11. This pressing is an elastic pressing, unlike rigid pressing, which may cause large vibrations due to the unevenness of the edge of the speed limiter rope wheel 11. This ensures that even with a certain amount of vibration, the measuring wheel 31 and the drive wheel 21 can reliably contact the speed limiter rope wheel 11, reducing measurement errors.

[0058] Furthermore, such as Figure 1 and Figure 5 As shown, the first support 24 is fixedly connected to the base 6, the second support 33 is slidably connected to the base 6, a slide rail is provided between the second support 33 and the base 6, and a lead screw adjusting rod 8 is provided at the bottom of the second support 33.

[0059] Furthermore, such as Figure 6 As shown, the drive wheel 21 or the measuring wheel 31 contacts the speed limiter rope wheel 11. The measuring wheel 31 is mounted on the second bracket 32 ​​via a shaft, and the position of the measuring wheel 31 can be adjusted axially so that the measuring wheel 31 can accurately contact the bottom of the groove of the speed limiter rope wheel 11.

[0060] With the above technical solution, when the diameters of certain speed limiter rope wheels 11 are different, it is necessary to adjust the positions of the first bracket 23 and the second bracket 32 ​​to adapt to different measurement scenarios. In this invention, a lead screw adjusting rod 8 is threaded onto the second support 33. When one end of the lead screw adjusting rod 8 is turned, the second support 33 slides left and right along the lead screw, and simultaneously, the second support 33 is also limited to sliding via a slide rail. The lead screw adjusting rod 8 enables the second support 33, the second bracket 32 ​​on the second support 33, and the measuring wheel 31 to move horizontally, facilitating the contact between the measuring wheel 31 and the speed limiter rope wheel 11, and making it applicable to speed limiter rope wheels 11 of different sizes.

[0061] Furthermore, such as Figure 1 and Figure 8 As shown, the rim cross-section of the measuring wheel 31 is a convex arc shape. The rim curvature of the measuring wheel 31 is smaller than the inner rim curvature of the groove of the speed limiter rope wheel 11. The center of the rim of the measuring wheel 31 is in contact with the groove of the speed limiter rope wheel 11, and the outer side of the rim of the measuring wheel 31 is not in contact with the groove of the speed limiter rope wheel 11.

[0062] Because the groove of the speed limiter pulley 11 is a concave arc shape to hold the wire rope, the rim of the measuring pulley 31 is designed with a corresponding convex arc shape for easy contact and measurement. Figure 7 As shown, the rim curvature of the measuring wheel 31 is smaller than the inner rim curvature of the groove of the speed limiter rope wheel 11. The center of the rim of the measuring wheel 31 contacts the groove of the speed limiter rope wheel 11, while the outer side of the rim of the measuring wheel 31 does not contact the groove of the speed limiter rope wheel 11. This is to avoid excessive frictional contact between the side of the measuring wheel 31 and the side wall of the groove, which would affect the measurement results.

[0063] Furthermore, such as Figure 1 and Figure 3 As shown, the second bracket 32 ​​includes an upper bracket 321 and a lower bracket 322. The lower bracket 322 is inserted into the upper bracket 321 and slidably connected to the upper bracket 321. The upper bracket 321 is provided with a locking knob 323 corresponding to the lower bracket 322.

[0064] The height of the measuring wheel 31 can be adjusted by adjusting the distance between the upper bracket 321 and the lower bracket 322, and the upper bracket 321 and the lower bracket 322 can be fixed by the locking knob 323, so that the second bracket 32 ​​and the measuring wheel 31 can be adjusted and contacted.

[0065] Furthermore, such as Figure 6 As shown, the measuring wheel 31 is rotatably connected to the upper support 321, and a plurality of pressure sensors 311 are arranged in a circular array on the outer side of the center plane of the measuring wheel 31, preferably four pressure sensors.

[0066] Using the above technical solution, the speed limiter pulley 11 drives the measuring wheel 31 to rotate. The indicator light 324 on the upper bracket illuminates when the pressure sensor 311 on the measuring wheel 31 contacts the bottom of the groove of the speed limiter pulley 11, thus determining whether the installation of the measuring wheel 31 is accurate. When the measuring wheel 31 rotates one revolution, all pressure sensors 311 detect a signal. At this time, the corresponding indicator light on the control host 4 will illuminate four times, indicating that the measuring wheel 31 is correctly installed and can effectively measure the diameter of the groove bottom of the speed limiter pulley 11.

[0067] Furthermore, the axial position of the measuring wheel 31 can also be finely adjusted. The measuring wheel 31 has a shaft hole in its center, and the upper bracket 321 has a mounting shaft for mounting the measuring wheel 31. By adjusting the position of the shaft hole and the mounting shaft, the measuring wheel 31 can be adjusted circumferentially, making it easier to align the measuring wheel 31 with the groove of the speed limiter rope wheel 11.

[0068] Furthermore, at least two pressure sensors are spaced apart along the axial direction on the outer side of the drive wheel 21, and the two pressure sensors are aligned along the axial direction. The installation positions of the two pressure sensors correspond to the outer edges of the grooves on both sides of the speed limiter rope wheel 11. An indicator light is provided on the first bracket 23 to detect whether the axis of the drive wheel 21 is parallel to the axis of the speed limiter rope wheel 11. The indicator light will only light up when both sensors on the drive wheel 21 detect a contact signal with the outer edge of the groove of the speed limiter rope wheel 11, indicating that the installation position of the drive wheel 21 is not skewed, ensuring the accuracy of transmission and reducing unnecessary measurement errors. In addition, a motor mounting sleeve 231 is provided on the first bracket 23. The motor can slide and adjust axially within the motor mounting sleeve 231, and a locking device is provided for locking.

[0069] Furthermore, the control host 4 is electrically connected to the motor assembly 22, the first sensor assembly 5, the second sensor assembly 312, and the pressure sensor 311. The control host 4 has a pre-loaded calculation program that calculates the final pitch circle diameter of the speed limiter pulley 11 based on the aforementioned sensors and the input wire rope diameter value.

[0070] Furthermore, the base 6 is provided with an electromagnetic knob 61, and the base 6 is detachably connected to the base of the speed limiter 1 through the electromagnetic knob 61, so that the base can be easily adjusted and fixed through the electromagnetic knob 61.

[0071] Example 2:

[0072] Based on the measuring device in Example 1, a method for measuring the pitch circle diameter of a speed limiter rope pulley is implemented using this device, including the following steps:

[0073] S1: Speed ​​governor 1 is shut down and powered off. Remove the wire rope and brake assembly from the speed governor pulley 11 to reserve space for the installation of the measuring device.

[0074] Step S1 is used to measure the speed governor 1 speed governor rope wheel 11 in a confined elevator space. To ensure the measurement space, the wire rope and other space-consuming components need to be removed.

[0075] S2: Adjust the position of the first bracket 23, including rotating the first bracket 23 away from the speed limiter sheave 11 around the hinge axis at the bottom, adjusting the position of the base 6 so that the drive wheel 21 does not interfere with the speed limiter sheave 11, and continuing to adjust the first bracket 23 to rotate in the opposite direction around the hinge axis so that the drive wheel 21 is aligned with the outer edge of the speed limiter sheave 11, and observe whether the indicator light on the first bracket 23 is lit; since the steel wire rope is removed during measurement and the elevator is not working, it is necessary to drive the speed limiter sheave 11 to rotate through the drive wheel 21 to carry out subsequent measurement work. In addition, adjusting the position of the first bracket 23 also includes adjusting the position of the motor assembly 22 inside the motor mounting sleeve 231 to ensure that the axis of the drive wheel 21 is parallel to the axis of the speed limiter sheave 11.

[0076] S3: Adjust the second bracket 32 ​​and the second support 33, including adjusting the position of the second support 33 along the base 6, deflecting the lower bracket 322 away from the speed limiter rope wheel 11 along the hinge axis at the bottom, adjusting the position of the upper bracket 321 and the lower bracket 322 so that the outer edge center of the measuring wheel 31 contacts the bottom of the groove of the speed limiter rope wheel 11, and locking the position of the second support 33 and the upper bracket 321;

[0077] S4: Adjust the clamping assembly to ensure that both the drive wheel 21 and the measuring wheel 31 are effectively pressed against the speed limiter rope wheel 11; the speed limiter rope wheel 11 can be manually rotated to drive the motor of the unpowered drive wheel 21, and to reverse-check whether the pressure sensor on the drive wheel 21 can detect the contact signal of the two outer edges of the groove of the speed limiter rope wheel 11. If the indicator light is on, it indicates that the drive wheel 21 is installed correctly.

[0078] S5: The sensing element of the first sensor assembly 5 is placed outside the speed limiter pulley 11; the measuring head base of the first sensor assembly 5 is placed on the base 6, so that the measuring head is aligned with the sensing element.

[0079] S6: Predicted quantity, start motor assembly 22 drives drive wheel 21 to rotate, drive speed limiter rope wheel 11 to rotate, speed limiter rope wheel 11 drives measuring wheel 31 to rotate, observe whether the indicator lights 324 on the upper bracket 321 corresponding to the pressure sensor 311 on the measuring wheel 31 are all lit, and judge whether the installation of measuring wheel 31 is accurate.

[0080] S7: Formal measurement begins. Start the drive wheel 21. After the speed of the drive wheel 21 stabilizes, the control host 4 records the measurement data of the first sensor assembly 5 and the second sensor assembly 312.

[0081] S8: Calculate the pitch circle diameter of the rope sheave. Based on the contact between the bottom of the groove of the driving wheel 21 and the measuring wheel 31 and the slip-free transmission to ensure that the linear velocity at the contact point of the two wheels is the same, the rotational angular velocity of the measuring wheel 31 and the speed limiter rope sheave 11 is obtained by inputting the diameter of the measuring wheel 31 into the control host 4, and then the bottom diameter of the groove of the speed limiter rope sheave 11 is obtained. Then the diameter of the wire rope is input. The pitch circle diameter of the speed limiter rope sheave 11 is obtained by adding the bottom diameter of the groove of the speed limiter rope sheave 11 to the diameter of the wire rope. At the same time, multiple measurements are taken and the average value is taken.

[0082] The specific calculations of the control host 4 are as follows: After the drive wheel 21 drives the speed limiter rope wheel 11 to rotate smoothly, the first sensor component 5 acquires the rotational angular velocity W1, and simultaneously records the rotational angular velocity W2 acquired by the second sensor component 312. The control host selects the stably acquired W1 and W2 data and calculates the ratio. The radius r of the measuring wheel 31 is a known design dimension and can also be determined by measuring tools. Then, the radius R of the bottom of the speed limiter rope wheel 11 groove can be obtained through the calculation of the control host 4. The radius R of the bottom of the speed limiter rope wheel 11 groove is converted into a diameter D. The diameter d1 of the wire rope is measured by a vernier caliper. Therefore, the obtained diameter D of the bottom of the speed limiter rope wheel 11 groove and the diameter d1 of the wire rope are input into the control host 4, and the control host 4 then calculates the pitch circle diameter D1 of the speed limiter rope wheel 11, where D1 = D + d1.

[0083] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A governor sheave pitch diameter measuring device characterized by: The device comprises a control host (4), a base (6), a driving wheel assembly (2), a measuring wheel assembly (3) and a first sensor assembly (5) on the base (6), the base (6) is arranged on the base of the speed limiter (1) and is located on one side of the speed limiter pulley (11), one end of the base of the first sensor assembly (5) is located on the base (6), and the detection end of the first sensor assembly (5) is located on one side of the speed limiter pulley (11) and is used to obtain the rotational angular velocity of the speed limiter pulley (11); The driving wheel assembly (2) comprises a first support (24), a first support (23), a motor assembly (22) and a driving wheel (21), the first support (24) is hinged to the bottom of the first support (23), the driving wheel (21) rotates through the motor assembly (22) and drives the speed limiter pulley (11) to rotate; The measuring wheel assembly (3) comprises a second support (33), a second support (32), a measuring wheel (31) and a second sensor assembly (312) on the measuring wheel (31), the second sensor assembly (312) is used to obtain the rotational angular velocity of the measuring wheel (31), the second support (33) is hinged to the bottom of the second support (32), the measuring wheel (31) is in close contact with the groove of the speed limiter pulley (11), and a pre-tightening force is applied through the second support (32) to prevent relative sliding; The driving wheel assembly (2) and the measuring wheel assembly (3) are both provided with a tightening assembly; The rim section of the measuring wheel (31) is a convex circular arc type, the arc of the rim of the measuring wheel (31) is smaller than the arc of the inner edge of the groove of the speed limiter pulley (11), the center of the rim of the measuring wheel (31) is in contact with the groove of the speed limiter pulley (11), and the outer side of the rim of the measuring wheel (31) is not in contact with the groove of the speed limiter pulley (11); A plurality of pressure sensors (311) are arranged in an array on the outer circumference of the center surface of the measuring wheel (31).

2. The speed limiter sheave pitch diameter measuring device of claim 1, wherein: Two tightening assemblies are arranged in the first support (24) and the second support (33) respectively, the tightening assembly comprises a spring (71) and a worm and gear lifting assembly (7), one end of the worm in the worm and gear lifting assembly (7) is provided with an adjusting knob (72) extending out of the corresponding support, one end of the spring (71) is fixed on the top of the lead screw of the worm and gear lifting assembly (7), the spring (71) moves up and down through the worm and gear lifting assembly (7), and the spring (71) extends out of the corresponding support and abuts against the bottom of the corresponding support.

3. The speed limiter sheave pitch diameter measuring device of claim 2, wherein: The first support (24) is fixedly connected with the base (6), the second support (33) is slidably connected with the base (6), a slide rail is arranged between the second support (33) and the base (6), and the bottom of the second support (33) is provided with a lead screw adjusting rod (8).

4. The speed limiter sheave pitch diameter measuring device of claim 3, wherein: The second support (32) comprises an upper support (321) and a lower support (322), the lower support (322) is inserted into the upper support (321) and is slidably connected with the upper support (321), and the upper support (321) is provided with a locking knob (323) corresponding to the part of the lower support (322).

5. The speed limiter sheave pitch diameter measuring device of claim 4, wherein: The hinge shafts of the first support (23) and the first support base (24), and the hinge shafts of the second support (32) and the second support base (33) are respectively located on the side close to the speed limiter rope wheel (11), and the two pressing assemblies are respectively located on the outer side of the corresponding hinge shaft.

6. The speed limiter sheave pitch diameter measuring device of claim 5, wherein: The measuring wheel (31) is rotationally connected with the upper support (321).

7. The speed limiter sheave pitch diameter measuring device of claim 6, wherein: The control host (4) is electrically connected with the motor assembly (22), the first sensor assembly (5), the second sensor assembly (312), and the pressure sensor (311).

8. The speed limiter sheave pitch diameter measuring device of claim 7, wherein: The base (6) is provided with an electromagnetic knob (61), and the base (6) is detachably connected with the base of the speed limiter (1) through the electromagnetic knob (61).

9. A method for measuring the pitch diameter of a speed limiter sheave, using a speed limiter sheave pitch diameter measuring device as claimed in any one of claims 1 to 8, characterised in that: The method comprises the following steps: S1: the speed limiter (1) is powered off and stopped, the steel wire rope on the speed limiter rope wheel (11) and the brake assembly are removed, and a space for arranging the measuring device is reserved; S2: the position of the first support (23) is adjusted, including deflecting the first support (23) around the hinge shaft at the bottom to the direction away from the speed limiter rope wheel (11), adjusting the position of the base (6) so that the driving wheel (21) does not interfere with the speed limiter rope wheel (11), continuing to adjust the first support (23) to rotate reversely around the hinge shaft so that the driving wheel (21) is aligned with and in contact with the outer edge of the speed limiter rope wheel (11), and observing whether the indicator light on the first support (23) is on; S3: the second support (32) and the second support base (33) are adjusted, including adjusting the position of the second support base (33) left and right along the base (6), deflecting the lower support (322) along the hinge shaft at the bottom to the direction away from the speed limiter rope wheel (11), adjusting the positions of the upper support (321) and the lower support (322) so that the outer edge center of the measuring wheel (31) is in contact with the groove bottom of the speed limiter rope wheel (11), and locking the positions of the second support base (33) and the upper support (321); S4: the pressing assembly is adjusted so that the driving wheel (21) and the measuring wheel (31) are effectively pressed against the speed limiter rope wheel (11); S5: the sensing part of the first sensor assembly (5) is arranged on the outer side wall of the speed limiter rope wheel (11), and the measuring head base of the first sensor assembly (5) is arranged on the base (6) so that the measuring head is aligned with the sensing part; S6: preliminary measurement, the motor assembly (22) is started to drive the driving wheel (21) to rotate, the driving wheel (21) drives the speed limiter rope wheel (11) to rotate, the speed limiter rope wheel (11) drives the measuring wheel (31) to rotate, and whether the indicator light (324) corresponding to the upper support (321) on the measuring wheel (31) is on is observed to determine whether the installation of the measuring wheel (31) is accurate; S7: formal measurement, the driving wheel (21) is started, and after the speed of the driving wheel (21) is stable, the control host (4) records the measurement data of the first sensor assembly (5) and the second sensor assembly (312). S8: Calculate the rope wheel pitch circle diameter, based on the driving wheel (21) and measuring wheel (31) groove bottom contact and make no sliding transmission to ensure that the two wheel edge contact point line speed is the same size, by the obtained measuring wheel (31) and speed limiter rope wheel (11) rotation angular velocity, known radius of measuring wheel (31), and then get the radius of the speed limiter rope wheel (11) groove bottom, the radius of the speed limiter rope wheel (11) groove bottom is converted into diameter, then input the diameter of the steel wire rope, the diameter of the speed limiter rope wheel (11) groove bottom plus the diameter of the steel wire rope to get the pitch circle diameter of the speed limiter rope wheel (11).

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