Speed ​​measurement unit test and verification device

Abstract

This application belongs to the field of instrumentation technology, specifically providing a speed measurement unit testing and verification device. The device includes a mounting platform, a drive unit, a simulation unit, a support unit, and a display unit. The drive unit is mounted on the mounting platform. The simulation unit is detachably mounted on the power output end of the drive unit and driven to rotate by the drive unit. The support unit is detachably mounted on the mounting platform and supports the speed measurement unit. The display unit is electrically connected to the speed measurement unit to display the measurement results of the speed measurement unit on the simulation unit. Different simulation units can be replaced according to actual needs to simulate the real working conditions of different equipment. Simultaneously, different support units can be replaced to meet the installation requirements of different types of speed measurement units, eliminating the need to develop a corresponding testing and verification device for each type of equipment's speed measurement unit, thereby reducing production costs.

Description

Technical Field

[0001] This application belongs to the field of instrumentation technology, specifically relating to a test and verification device for a speed measurement unit. Background Technology

[0002] Rotating equipment such as steam turbines and feedwater pumps are generally equipped with speed measurement units to measure their operating speed. Before installing the speed measurement unit, its usability is often tested and verified by a testing and verification device to ensure the accuracy and reliability of the measurement results. However, current testing and verification devices can only be adapted to the speed measurement unit of one type of equipment. Each type of equipment's speed measurement unit requires the development of a corresponding testing and verification device, resulting in high costs. Utility Model Content

[0003] The purpose of this application is to provide a test and verification device for a rotational speed measurement unit, which aims to solve the technical problem that existing test and verification devices can usually only be adapted to the rotational speed measurement unit of one type of equipment, and each type of equipment requires the development of a corresponding test and verification device, resulting in high costs.

[0004] To achieve the above objectives, the technical solution adopted in this application is: a speed measurement unit test and verification device, comprising an installation platform, a drive unit, a simulation unit, a support unit, and a display unit. The drive unit is disposed on the installation platform, the simulation unit is detachably installed on the power output end of the drive unit and driven to rotate by the drive unit, the support unit is detachably installed on the installation platform, the support unit is used to support the speed measurement unit, and the display unit is used to electrically connect with the speed measurement unit to display the measurement results of the speed measurement unit for the simulation unit.

[0005] Furthermore, the mounting position of the support unit on the mounting platform is adjustable, thereby adjusting the distance between the speed measurement unit and the simulation unit.

[0006] Furthermore, the installation platform has multiple installation structures, and the support unit can be installed on any one of the installation structures, with at least some of the installation structures distributed at intervals toward the simulation unit.

[0007] Furthermore, the mounting structure is a through hole, the support unit is provided with a first threaded hole, and the speed measurement unit test and verification device also includes a threaded fastener, which passes through the through hole and is threadedly connected to the first threaded hole.

[0008] Alternatively, the mounting structure is a first threaded hole, the support unit is provided with a through hole, and the speed measurement unit test and verification device also includes a threaded fastener, which passes through the through hole and is threadedly connected to the first threaded hole.

[0009] Furthermore, the support unit is provided with a second threaded hole, and the speed measuring unit is threadedly connected to the second threaded hole. The speed measuring unit can adjust the gap between itself and the simulation unit by rotating relative to the second threaded hole.

[0010] Furthermore, the power output end of the drive unit is an output shaft, and the simulation unit is provided with a connection hole, through which the simulation unit can be detachably sleeved onto the output shaft.

[0011] Furthermore, the speed measurement unit test and verification device also includes a protective shell, which is set on the mounting platform and encloses the mounting platform to form a cavity, where the simulation unit and the support unit are both located.

[0012] Furthermore, the simulation unit is equipped with weight reduction holes and / or weight reduction grooves for weight reduction.

[0013] Furthermore, the simulation unit is a gear disk, which is arranged horizontally, and the drive unit is arranged below the gear disk.

[0014] Furthermore, the speed measurement unit test and verification device also includes a support leg, which is located at the bottom of the mounting platform. The simulation unit and the support unit are both located on the upper side of the mounting platform. The mounting platform has a mounting hole, and the drive unit is located on the lower side of the mounting platform. The power output end of the drive unit passes through the mounting hole and extends to the upper side of the mounting platform to connect with the simulation unit.

[0015] Compared with the prior art, the beneficial effects of the speed measurement unit testing and verification device provided in this application are as follows: During testing, a speed measurement unit that is completely identical to the speed measurement unit in the equipment (such as a steam turbine or feedwater pump) is installed on the support unit. The simulation unit is driven to rotate by the power output end of the drive unit. The simulation unit can be replicated according to the structure of the speed measuring gear disk used in conjunction with the speed measurement unit in the equipment to simulate the real working conditions of the equipment. The speed measurement unit measures the speed of the simulation unit, and then the measurement result is displayed by the display unit to verify whether the measurement result of the speed measurement unit is accurate and reliable, thereby realizing the testing and verification of the usability of the speed measurement unit. Since the simulation unit is detachably installed on the power output end of the drive unit, different simulation units can be replaced according to actual needs to simulate the real working conditions of different equipment. When replacing the simulation unit, it is often necessary to replace the corresponding speed measurement unit. Since the support unit is detachably installed on the mounting platform, different support units can be replaced to meet the installation requirements of different types of speed measurement units. That is, the speed measurement unit test and verification device provided in this application can be adapted to the speed measurement units of various equipment, without the need to develop a corresponding test and verification device for the speed measurement unit of each type of equipment, thereby reducing production costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional view of the speed measurement unit test and verification device provided in the embodiments of this application;

[0018] Figure 2 for Figure 1 A top view of the mounting platform of the speed measurement unit test and verification device shown;

[0019] Figure 3 for Figure 1 The top view of the simulation unit of the speed measurement unit test verification device shown.

[0020] The following are the labeling elements in the figure:

[0021] 10. Mounting platform; 11. Mounting structure; 12. Mounting holes;

[0022] 20. Drive unit; 21. Output shaft;

[0023] 30. Simulation unit; 31. Connecting hole; 32. Weight reduction hole; 33. Gear groove;

[0024] 40. Support unit; 41. First threaded hole; 42. Second threaded hole;

[0025] 50. Rotational speed measurement unit;

[0026] 60. Bushing;

[0027] 70. Capping;

[0028] 80. Bearings;

[0029] 90. Protective outer casing;

[0030] 100. Receptacle cavity;

[0031] 110. Support leg. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0033] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] like Figure 1 As shown, this application embodiment provides a speed measurement unit testing and verification device, including a mounting platform 10, a drive unit 20, a simulation unit 30, a support unit 40, and a display unit (not shown). The drive unit 20 is disposed on the mounting platform 10. The simulation unit 30 is detachably mounted on the power output end of the drive unit 20 and driven to rotate by the drive unit 20. The support unit 40 is detachably mounted on the mounting platform 10 and is used to support the speed measurement unit 50. The display unit is used to be electrically connected to the speed measurement unit 50 to display the measurement results of the speed measurement unit 50 for the simulation unit 30.

[0037] During testing, a speed measuring unit 50 identical to the speed measuring unit 50 in the equipment (such as a steam turbine or feedwater pump) is installed on the support unit 40. The simulation unit 30 is driven to rotate by the power output end of the drive unit 20. The simulation unit 30 can be replicated according to the structure of the speed measuring gear disc used in conjunction with the speed measuring unit 50 in the equipment to simulate the actual working conditions of the equipment. The speed measuring unit 50 measures the speed of the simulation unit 30, and then the measurement result is displayed through the display unit to verify whether the measurement result of the speed measuring unit 50 is accurate and reliable, thereby realizing the test and verification of the usability of the speed measuring unit 50. Since the simulation unit 30 is detachably installed on the power output end of the drive unit 20, different simulation units 30 can be replaced according to actual needs to simulate the real working conditions of different equipment. When replacing the simulation unit 30, it is often necessary to replace the matching speed measurement unit 50. Since the support unit 40 is detachably installed on the installation platform 10, different support units 40 can be replaced to meet the installation requirements of different types of speed measurement units 50. That is, the speed measurement unit test and verification device provided in this application can be adapted to the speed measurement units 50 of various equipment, without the need to develop corresponding test and verification devices for the speed measurement units 50 of each type of equipment, thereby reducing production costs.

[0038] Steam turbines are generally equipped with an overspeed protection system, which works in conjunction with the speed measurement unit 50. When the turbine speed exceeds a specified value, it can activate promptly, reducing or stopping the steam intake to prevent serious equipment damage and safety accidents caused by turbine overspeed. The speed measurement unit testing and verification device provided in this application embodiment can be used not only to test and verify the availability of the speed measurement unit 50, but also to test and verify the availability of the overspeed protection system. During testing, a speed measurement unit 50 identical to the one in the steam turbine is installed on the support unit 40. Simultaneously, an overspeed protection system identical to the one in the steam turbine is electrically connected to the speed measurement unit 50. The measurement results from the simulation unit 30 are transmitted to the overspeed protection system. When the overspeed of the simulation unit 30 exceeds a specified value, the overspeed protection system is observed to ensure timely activation, such as through audible and visual alarms, thereby verifying the availability of the overspeed protection system.

[0039] The simulation unit 30 can specifically be a gear disk, which is modeled after the structure of the speed measuring gear disk used in conjunction with the speed measuring unit 50 in the device. Its edge is provided with teeth and tooth grooves 33. The number of tooth grooves 33 can be adjusted according to actual needs. For example, the number of tooth grooves 33 can be 60. There are various types of speed measuring units 50, the most common being the magnetoelectric type. When the gear disk rotates, the teeth and tooth grooves 33 on the gear disk will alternately pass through the speed measuring unit 50. When the teeth are close to the speed measuring unit 50, the magnetic flux increases. When the tooth grooves 33 are close to the speed measuring unit 50, the magnetic flux decreases. The change in magnetic flux will generate an induced electromotive force in the coil of the speed measuring unit 50, thereby generating a periodic voltage pulse signal. The frequency of the voltage pulse signal is proportional to the speed of the gear disk. By measuring the frequency of the pulse signal, the speed of the gear disk can be determined.

[0040] In some embodiments, the mounting position of the support unit 40 on the mounting platform 10 is adjustable, thereby adjusting the distance between the speed measuring unit 50 and the simulation unit 30 on the support unit 40. After replacing different simulation units 30 and speed measuring units 50, it is often necessary to readjust the distance between the simulation unit 30 and the speed measuring unit 50 to ensure that the distance between them is appropriate, thereby improving the measurement accuracy of the speed measuring unit 50. By adjusting the mounting position of the support unit 40 on the mounting platform 10, the distance between the simulation unit 30 and the speed measuring unit 50 can be adjusted, thus adapting to different speed measuring units 50.

[0041] In some embodiments, as shown in the figure, the mounting platform 10 is provided with multiple mounting structures 11, and the support unit 40 can be mounted on any one of the mounting structures 11. At least some of the mounting structures 11 are spaced apart in the direction of approaching the simulation unit 30. By mounting the support unit 40 on a mounting structure 11 closer to the simulation unit 30, the distance between the speed measuring unit 50 and the simulation unit 30 can be reduced. Conversely, by mounting the support unit 40 on a mounting structure 11 farther from the simulation unit 30, the distance between the speed measuring unit 50 and the simulation unit 30 can be increased, thereby achieving adjustment of the distance between the simulation unit 30 and the speed measuring unit 50. Of course, there are other ways to achieve adjustment of the distance between the simulation unit 30 and the speed measuring unit 50. For example, a linear motion module can be provided on the mounting platform 10, and the support unit 40 can be detachably mounted on the linear motion module. The linear motion module can drive the support unit 40 to move in the direction of approaching or moving away from the simulation unit 30, thereby achieving adjustment of the distance between the simulation unit 30 and the speed measuring unit 50. For example, a slide rail can be set on the mounting platform 10, and a slider is slidably mounted on the slide rail. The support unit 40 is detachably mounted on the slider. By making the slider slide on the slide rail, the support unit 40 can be moved towards or away from the simulation unit 30, thereby adjusting the distance between the simulation unit 30 and the speed measuring unit 50.

[0042] In some embodiments, the support unit 40 is threadedly connected to the mounting platform 10. This threaded connection not only allows for easy disassembly and replacement of the support unit 40 but also ensures its stable fixation on the mounting platform 10, preventing wobbling and thus improving the measurement accuracy of the speed measuring unit 50. Of course, in other embodiments, the connection between the support unit 40 and the mounting platform 10 can be magnetic, snap-fit, or plug-in.

[0043] In some embodiments, combined with Figure 1 and Figure 2As shown, the mounting structure 11 is a through hole, and the support unit 40 is provided with a first threaded hole 41. The speed measurement unit test and verification device also includes a threaded fastener (not shown), which passes through the through hole and is threadedly connected to the first threaded hole 41. When the support unit 40 needs to be replaced, loosen the threaded fastener so that it exits the first threaded hole 41, remove the support unit 40, and then place the support unit 40 to be replaced on the mounting platform 10, aligning the first threaded hole 41 with the through hole. Then tighten the threaded fastener so that it enters the first threaded hole 41 and is threadedly connected to it. This completes the replacement of the support unit 40, and the operation is simple and quick. When it is necessary to adjust the installation position of the support unit 40 on the mounting platform 10, loosen the threaded fastener so that it exits the first threaded hole 41. Then, move the support unit 40 so that the first threaded hole 41 of the support unit 40 is aligned with the other mounting structure 11, i.e., the through hole. Then tighten the threaded fastener so that it enters the first threaded hole 41 and is threadedly connected to it. This achieves the adjustment of the position of the support unit 40, which is simple and quick. Of course, the positions of the through hole and the first threaded hole 41 can be interchanged. That is, the mounting structure 11 is the first threaded hole 41, and the support unit 40 is provided with a through hole. The threaded fastener passes through the through hole and is threadedly connected to the first threaded hole 41. The through hole can be a round hole or an oblong hole. When an oblong hole is selected, the fixed position of the support unit 40 on the mounting platform 10 can be finely adjusted along the length of the oblong hole, which can also achieve the adjustment of the gap between the speed measurement unit 50 and the simulation unit 30. In addition, the mounting structure 11 is not limited to a hole structure. In some other embodiments, the mounting structure 11 can be a plug-in post for insertion into the support unit 40, a buckle for fastening with the support unit 40, a magnetic block for magnetically connecting with the support unit 40, a fixing sleeve for covering the support unit 40, etc.

[0044] In some embodiments, such as Figure 1As shown, the support unit 40 also has a second threaded hole 42. The speed measuring unit 50 is threadedly connected to the second threaded hole 42. The speed measuring unit 50 can adjust the gap between itself and the simulation unit 30 by rotating relative to the second threaded hole 42. The speed measuring unit 50 is fixed to the support unit 40 by the threaded connection to the second threaded hole 42, which not only meets the requirements for disassembly and replacement of the speed measuring unit 50, but also ensures that the speed measuring unit 50 is stably fixed to the support unit 40 without easily shaking, thereby improving the measurement accuracy of the speed measuring unit 50. Furthermore, after replacing the simulation unit 30 and the speed measuring unit 50, rotating the speed measuring unit 50 in the second threaded hole 42 allows the speed measuring unit 50 to move axially along the second threaded hole 42, thereby adjusting the gap between the speed measuring unit 50 and the simulation unit 30 to ensure a suitable gap and improve the measurement accuracy of the speed measuring unit 50.

[0045] In some embodiments, the support unit 40 is provided with a plurality of second threaded holes 42, which are spaced apart along the height of the support unit 40. The speed measuring unit 50 can be installed in any one of the second threaded holes 42 to achieve height adjustment of the speed measuring unit 50, thereby ensuring that the speed measuring unit 50 can be aligned with the simulation unit 30. In other embodiments, the support unit 40 can be a telescopic structure, which can adjust the height of the speed measuring unit 50 by telescoping.

[0046] In some embodiments, such as Figure 1 As shown, there are multiple support units 40, which are distributed at intervals along the circumference of the simulation unit 30. Correspondingly, some mounting structures 11 are distributed at intervals around the simulation unit 30. Each support unit 40 can be equipped with a speed measurement unit 50, so that the availability of multiple speed measurement units 50 can be tested and verified at the same time, thereby improving the testing efficiency.

[0047] In some embodiments, combined with Figure 1 and Figure 3 As shown, the power output end of the drive unit 20 is an output shaft 21. The simulation unit 30 is provided with a connection hole 31, through which the simulation unit 30 is detachably mounted on the output shaft 21, allowing for the replacement of different simulation units 30. When the drive unit 20 is started, the output shaft 21 of the drive unit 20 rotates, thereby driving the simulation unit 30 to rotate. The simulation unit 30 and the output shaft 21 can be connected by a key to achieve synchronous rotation of the output shaft 21 and the simulation unit 30. Specifically, the drive unit 20 can be a motor, which can adjust the speed of the output shaft 21 to meet different testing requirements.

[0048] In some embodiments, such as Figure 1 As shown, the speed measurement unit test and verification device also includes a bushing 60, a cover 70, and a bearing 80. One end of the bushing 60 is connected to the mounting platform 10, and a limiting surface facing away from the mounting platform 10 is formed inside the bushing 60. The bearing 80 is disposed on the bushing 60 and sleeved on the output shaft 21, with one end of the bearing 80 abutting against the limiting surface. The cover 70 is connected to the other end of the bushing 60 and abuts against the end of the bearing 80 away from the limiting surface, thereby achieving axial fixation of the bearing 80. Specifically, the bushing 60 and the cover 70 can be fixed to the mounting platform 10 with screws.

[0049] In some embodiments, such as Figure 1 As shown, the speed measurement unit test and verification device also includes a protective housing 90. The protective housing 90 is disposed on the mounting platform 10 and forms a receiving cavity 100 with the mounting platform 10. The simulation unit 30 and the support unit 40 are both located within the receiving cavity 100. By setting the protective housing 90 on the mounting platform 10 and placing the simulation unit 30 and the support unit 40 within the receiving cavity 100 formed by the protective housing 90 and the mounting platform 10, it is possible to prevent personnel from touching the simulation unit 30 and the speed measurement unit 50 mounted on the support unit 40 during the test. This ensures the personal safety of personnel and avoids interference with the test, thereby ensuring the accuracy of the test results.

[0050] In some embodiments, the protective housing 90 is a transparent protective housing 90. By making the protective housing 90 transparent, the interior of the protective housing 90 is visible, allowing for direct observation of the movement state of the simulation unit 30, which facilitates timely detection of safety hazards by staff.

[0051] In some embodiments, the rotational speed measuring unit 50 further includes a metal protective frame disposed around the perimeter of the mounting platform 10, and a transparent protective shell 90 fixedly connected to the metal protective frame. By providing a metal protective frame around the perimeter of the mounting platform 10, the high-speed rotating simulation unit 30 can be prevented from flying out of the protective shell 90 uncontrollably and injuring nearby personnel. Specifically, the metal protective frame can be made of high-strength aluminum alloy, and the protective shell 90 can be fixed to the metal protective frame with screws.

[0052] In some embodiments, such as Figure 1 As shown, both the drive unit 20 and the simulation unit 30 are located at the center of the mounting platform 10. By placing the drive unit 20 and the simulation unit 30 at the center of the mounting platform 10, the balance and stability of the mounting platform 10 can be ensured when the drive unit 20 drives the simulation unit 30 to rotate at high speed.

[0053] In some embodiments, such as Figure 1As shown, the simulation unit 30 is a geared disk arranged horizontally, and the drive unit 20 is arranged below the geared disk. Compared with arranging the geared disk vertically, arranging it horizontally (laterally) can maintain a low center of rotation and improve the stability of the mounting platform 10 when the geared disk rotates at high speed. Furthermore, by arranging the drive unit 20 below the geared disk, the center of gravity can be further stabilized, improving the stability of the mounting platform 10 when the geared disk rotates at high speed.

[0054] In some embodiments, such as Figure 1 As shown, the speed measurement unit test and verification device also includes a support leg 110, which is located at the bottom of the mounting platform 10. The simulation unit 30 and the support unit 40 are both located on the upper side of the mounting platform 10. The mounting platform 10 has a mounting hole 12. The drive unit 20 is located on the lower side of the mounting platform 10, and its power output end extends through the mounting hole 12 to the top of the mounting platform 10 to connect with the simulation unit 30. By providing the support leg 110 at the bottom of the mounting platform 10, the mounting platform 10 can be raised. By placing the drive unit 20 on the lower side of the mounting platform 10, the space on the upper side of the mounting platform 10 can be avoided, which helps to reduce the overall height of the device. Simultaneously, the height of the simulation unit 30 from the mounting platform 10 can be reduced, allowing the simulation unit 30 to maintain a low center of rotation and improving the stability of the mounting platform 10 during high-speed rotation. The mounting hole 12 in the mounting platform 10 allows the power output end of the drive unit 20 to extend through the mounting hole 12 to the upper side of the mounting platform 10 to connect with the simulation unit 30. Specifically, the outrigger 110 can be fixed to the bottom of the mounting platform 10 with screws.

[0055] In some embodiments, the drive unit 20 is detachably mounted on the bottom of the mounting platform 10, thereby allowing for the replacement of different types of drive units 20 as needed. Specifically, the drive unit 20 can be fixed to the mounting platform 10 with screws.

[0056] In some embodiments, as shown in the figure, the simulation unit 30 is provided with weight-reducing holes 32 for weight reduction. By providing weight-reducing holes 32 in the simulation unit 30, the weight of the simulation unit 30 can be reduced, thereby reducing the risk of inertia during high-speed rotation and improving stability. The number of weight-reducing holes 32 is not limited; the figure shows four weight-reducing holes 32, and the four weight-reducing holes 32 are evenly distributed around the center of the simulation unit 30 to improve stability during rotation. Of course, the weight-reducing holes 32 can be replaced with weight-reducing grooves, or the simulation unit 30 can be provided with both weight-reducing holes 32 and weight-reducing grooves.

[0057] It should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rotational speed measuring unit test verification device, characterized by, The device includes an installation platform, a drive unit, a simulation unit, a support unit, and a display unit. The drive unit is disposed on the installation platform. The simulation unit is detachably mounted on the power output end of the drive unit and is driven to rotate by the drive unit. The support unit is detachably mounted on the installation platform and is used to support the speed measurement unit. The display unit is used to be electrically connected to the speed measurement unit to display the measurement results of the speed measurement unit on the simulation unit.

2. The rotational speed measuring unit test verification device according to claim 1, characterized in that: The mounting position of the support unit on the mounting platform is adjustable, thereby adjusting the distance between the speed measuring unit and the simulation unit.

3. The speed measurement unit test and verification device according to claim 2, characterized in that: The installation platform has multiple installation structures, and the support unit can be installed on any one of the installation structures. At least some of the installation structures are distributed at intervals toward the simulation unit.

4. The speed measurement unit test and verification device according to claim 3, characterized in that: The mounting structure is a through hole, the support unit is provided with a first threaded hole, and the speed measurement unit testing and verification device also includes a threaded fastener, which passes through the through hole and is threadedly connected to the first threaded hole. Alternatively, the mounting structure is a first threaded hole, the support unit is provided with a through hole, and the speed measurement unit testing and verification device further includes a threaded fastener, which passes through the through hole and is threadedly connected to the first threaded hole.

5. The speed measurement unit test and verification device according to any one of claims 1-4, characterized in that: The support unit is provided with a second threaded hole, and the speed measuring unit is threadedly connected to the second threaded hole. The speed measuring unit can adjust the gap between itself and the simulation unit by rotating relative to the second threaded hole.

6. The speed measurement unit test and verification device according to any one of claims 1-4, characterized in that: The power output end of the drive unit is an output shaft, and the simulation unit is provided with a connection hole. The simulation unit is detachably sleeved on the output shaft through the connection hole.

7. The speed measurement unit test and verification device according to any one of claims 1-4, characterized in that: The speed measurement unit test and verification device also includes a protective shell, which is disposed on the mounting platform and forms a cavity with the mounting platform. The simulation unit and the support unit are both located inside the cavity.

8. The speed measurement unit test and verification device according to any one of claims 1-4, characterized in that: The simulation unit is equipped with weight reduction holes and / or weight reduction grooves for weight reduction.

9. The speed measurement unit test and verification device according to any one of claims 1-4, characterized in that: The simulation unit is a toothed disc, which is arranged horizontally, and the drive unit is arranged below the toothed disc.

10. The speed measurement unit test and verification device according to claim 9, characterized in that: The speed measurement unit test and verification device also includes a support leg, which is located at the bottom of the mounting platform. The simulation unit and the support unit are both located on the upper side of the mounting platform. The mounting platform has a mounting hole. The drive unit is located on the lower side of the mounting platform. The power output end of the drive unit passes through the mounting hole and extends to the upper side of the mounting platform to connect with the simulation unit.

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