Inertia-adjustable torsional impact test bench system

Abstract

The invention provides an inertia-adjustable torsional impact test bench system, which comprises a base, and a three-phase asynchronous motor, a first coupling, a first clutch, a second coupling, an inertia assembly, a second clutch, a power adapter shaft and a rigid coupling which are positioned on the base and are connected in sequence, and is characterized in that the rigid coupling is connected with a torque sensor; the torque sensor is connected with a tested piece; according to test requirements, the inertia assembly is adjusted to adapt to different working condition tests, the combination mode of the motor, the clutch and the inertia disc is adopted, the inertia disc is designed to be adjustable, and the inertia disc can be combined and adjusted as required according to test working condition requirements. The system is simple in structure, long in service life, low in maintenance cost, easy to operate, rapid in response, energy-saving in operation, small in occupied space, low in noise and low in environment requirement.

Description

Technical Field

[0001] The present invention is applicable to the test conditions where the torsional impact load of the tested parts such as gear boxes, transmission shafts, differentials, etc. needs to be tested. Background Art

[0002] At present, torsional impact tests mostly use hydraulic servo systems, which apply torsional impact loads to the tested equipment through hydraulic servo linear cylinder actuators. Its components include high-pressure accumulators, servo valve groups, high-precision angle sensors, torsional actuators, hydraulic pump stations and other components. The system is highly complex, and the design and debugging process is complicated. It requires professional technicians to maintain it. The hydraulic system pipelines and seals are prone to leakage or wear after long-term use. In addition, the hydraulic servo system occupies a large space and is not suitable for environments with limited space. Because the hydraulic system generates a lot of noise during the working process, especially under high pressure conditions, it has an adverse effect on the test environment; in addition, the system consumes a lot of energy and increases operating costs. The hydraulic system has high requirements for the environment, especially temperature and humidity, and is greatly affected by environmental fluctuations, which affects the test accuracy. The hydraulic system is mainly used for large loads and long-term testing needs, and it will appear too complicated in small-scale light load impact tests. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes an adjustable inertia torsional impact test bench system, which adopts a motor plus clutch and inertia plate combination, wherein the inertia plate adopts an adjustable design and can be adjusted according to the test conditions. The system has a simple structure, a long service life, low maintenance cost, simple operation, rapid response, energy-saving operation, small space occupation, low noise, and low environmental requirements.

[0004] To achieve the above object, the present invention provides the following technical solutions: An adjustable inertia torsional impact test bench system comprises a base, and a three-phase asynchronous motor, a first coupling, a first clutch, a second coupling, an inertia component, a second clutch, a power transfer shaft and a rigid coupling which are sequentially connected on the base, wherein the rigid coupling is connected to a torque sensor, and the torque sensor is connected to a test piece; the inertia component is adjusted according to test requirements to adapt to different working condition tests.

[0005] As a further solution of the present invention, the inertia assembly includes a guide shaft, a bearing seat is respectively provided on both sides of the guide shaft, a combined inertia disk and a flange are provided between the two bearing seats, the combined inertia disk is locked by a first fixing device, and a guide rod and a second fixing device are provided on one side of the flange.

[0006] As a further solution of the present invention, the inertia assembly further includes an arc-shaped support for supporting the combined inertia disk located above the arc-shaped support.

[0007] As a further solution of the present invention, the combined inertia disk is composed of a plurality of inertia disks, and there is a gap between the axial hole of the inertia disk and the guide shaft.

[0008] As a further solution of the present invention, a suitable inertia combination is selected according to the equipment working condition requirements, the second clutch is disconnected, the first clutch is connected, and the three-phase asynchronous motor is started. After the whole rotates to the set speed, the first clutch is disconnected, the motor power is disconnected, and the second clutch is started. The inertia plate drives the second clutch, and the power is finally transmitted to the measured object through the torque flange, completing an impact on the measured object.

[0009] As a further solution of the present invention, when adjusting the number of inertia disks of the combined inertia disk, the required number of inertia disks is selected, and the inertia disks are slid one by one through the guide rod until they contact the flange, and finally the inertia disk that has been moved to one side of the flange and the remaining inertia disks on the semicircular support are locked by the second fixing device and the first fixing device respectively, thereby completing the adjustment of the inertia disks.

[0010] As a further solution of the present invention, a plurality of guide rods and a second fixing device are provided on one side of the flange for adjusting the number of combined inertia discs.

[0011] As a further solution of the present invention, the inertia disk is provided with a guide groove cooperating with the guide rod.

[0012] As a further solution of the present invention, the first clutch, the inertia assembly and the second clutch are all provided with a protective cover.

[0013] The present invention has the following beneficial effects: 1. The present invention improves the combination of motor plus clutch and inertia disc, wherein the inertia disc adopts an adjustable design and can be adjusted according to the test conditions. The system has a simple structure, long service life, low maintenance cost, simple operation, rapid response, energy saving, small space occupation, low noise, and low environmental requirements.

[0014] 2. The design of the present invention can achieve when the test torque accuracy requirement is high, calculate and select the appropriate inertia combination according to the test needs, and fine-tune the speed within the allowable speed range to make the test torque value close to the target torque. When the torque is changed in subsequent tests, if the torque difference is large, the inertia disk can be increased or decreased or the speed can be adjusted or adjusted together to meet the subsequent other working conditions.

[0015] 3. The present invention designs a combined adjustment method for the inertia disk: when adjusting the inertia disk, the required number of inertia disks is selected according to the needs, and the inertia disks are slid one by one. After the inertia disk is separated from the semicircular support, it will slide along the guide surface of the guide shaft and cooperate with the rectangular key guide distributed on the circumference of the guide shaft. The bolt hole on the inertia disk passes through the screw (the second fixing device) and slides until it contacts the flange. Finally, the inertia disk that has been moved to one side of the flange and the remaining inertia disk on the semicircular support are respectively locked by nuts to complete the adjustment of the inertia disk. This adjustment method is simple and fast, and can quickly adapt to the testing needs of different working conditions.

[0016] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a stereoscopic diagram of an adjustable inertia torsional impact test bench system mentioned in the present invention.

[0018] Figure 2 It is a structural schematic diagram of the inertia component mentioned in the present invention.

[0019] Figure 3 It is a partial exploded schematic diagram of the inertia component mentioned in the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-Figure 3 As shown, the present invention provides an adjustable inertia torsional impact test bench system, including a base 1, and a three-phase asynchronous motor 2, a first coupling 3, a first clutch 4, a second coupling 5, an inertia assembly 6, a second clutch 7, a power transfer shaft 8 and a rigid coupling 9 connected in sequence on the base 1, the rigid coupling 9 is connected to a torque sensor, and the torque sensor is connected to a test piece; according to the test needs, the inertia assembly is adjusted to adapt to different working conditions; the present invention designs two clutches and an inertia plate combination mode, wherein the inertia plate adopts an adjustable design, and can be combined and adjusted according to the test conditions. The system has a simple structure, a long service life, low maintenance cost, simple operation, rapid response, energy-saving operation, small space occupation, low noise, and low environmental requirements. The overall structure of the system is simple, the connection and coordination between the components are relatively direct, the complex mechanical structure and transmission links are reduced, the complexity and failure rate of the system are reduced, and the stability and reliability of the system are improved.

[0022] Reference Figure 2As shown, the inertia assembly includes a guide shaft 10, a bearing seat 11 is arranged on both sides of the guide shaft 10, and a combined inertia disk 12 and a flange 14 are arranged between the two bearing seats 11. The combined inertia disk is locked by a first fixing device 13, which is locked by bolts and nuts in the present invention. A guide rod 15 and a second fixing device 16 are arranged on one side of the flange 14, and the second fixing device is a fixing method of bolts and nuts in the present invention; the adjustment process of the inertia assembly of the present invention is: disassemble the first fixing device 13 of the inertia disk, then move it toward the flange 14 through the guide rod 15, penetrate the guide rod 15 and the second fixing device 16, and lock it through the nut. This adjustment method is simple and fast and suitable for testing of various working conditions. As a core component, the inertia disk spindle assembly is composed of a guide shaft, a fastener, and a flange. The circumference of the guide column is evenly distributed with keys, and one end of the key is chamfered. This one-piece molding design ensures the accuracy and reliability of the component. The inner hole of the flange is welded into a whole after matching with the key, and then fixed through the fastener through the flange bolt hole, ensuring the structural stability of the entire spindle assembly.

[0023] Reference Figure 2 As shown, the inertia assembly further includes an arc support 17 for supporting a combined inertia disc located above the arc support 17. Further preferably, the combined inertia disc is composed of a plurality of inertia discs, and there is a gap between the axial hole of the inertia disc and the guide shaft 10. Figure 3 As shown, the guide shaft 10 is evenly distributed with keys on one end, and one end of the key is chamfered and integrally formed. The inner hole of the flange 14 is welded to form a whole after being matched with the key, and the second fixing device 16 passes through the flange bolt hole. A single inertia disk has a central hole and a partial notch on the circumference. Multiple inertia disks are passed through the guide shaft in sequence. Because the inner hole diameter of the inertia disk is much larger than the front end shaft diameter of the guide shaft, the inertia disk sinks due to gravity and contacts the semicircular support 17 during the sinking process. At this time, all the weight of the inertia assembly is supported by the semicircular support. The inertia disk is fixed axially by bolts to prevent the inertia disk from moving axially. The inertia disk has a clever aperture design, and after the support limit, it can also ensure that there is an appropriate gap between the inner hole of the inertia disk and the front end shaft diameter of the guide shaft. After the inertia disk is fixed, the bearing seats on both sides are installed and fixed by bolts. And a single inertia disk has a central hole and a partial notch on the circumference. This design is convenient for multiple inertia disks to pass through the guide shaft in sequence for installation, and can also achieve specific functions through cooperation with the guide shaft and other components after installation. After multiple inertia discs pass through the guide shaft, the inertia discs will sink due to gravity until they contact the semicircular support because the inner hole of the inertia discs is much larger than the shaft diameter at the front end of the guide shaft. At this time, all the weight is supported by the semicircular support. The aperture design of the inertia discs is ingenious. After the support limit is set, it can ensure that there is an appropriate gap between the inner hole of the inertia discs and the shaft diameter at the front end of the guide shaft. This ensures the stable installation of the inertia discs without hindering their sliding adjustment in the axial direction.

[0024] In the present invention, a suitable inertia combination is selected according to the working condition requirements of the equipment, the second clutch 7 is disconnected, the first clutch 4 is connected, and the motor is started. At this time, the motor drags the inertia disk connected to the shaft system, and the whole rotates to the set speed (the speed is measured by the motor encoder), the first clutch 4 is disconnected, the motor power is disconnected, and the second clutch 7 is started. The inertia disk drives the second clutch 7, and the power is finally transmitted to the measured object through the torque flange, completing an impact on the measured object. During the impact process, the torque flange records the instantaneous torque value of the impact, transmits the data to the test bench system, disconnects the second clutch 7, and completes an impact condition.

[0025] When the test torque accuracy requirement is high, the appropriate inertia combination is calculated and selected according to the test needs, and the speed can be fine-tuned within the allowable speed range to make the test torque value close to the target torque.

[0026] When changing the torque in subsequent tests, if the torque difference is large, the requirements of other subsequent working conditions can be met by increasing or decreasing the inertia disk or adjusting the speed or adjusting both.

[0027] When the test torque accuracy requirement is high, it is crucial to accurately calculate and select the appropriate inertia combination. The size of the inertia directly affects the size of the impact energy and torque. By accurately calculating and matching the inertia combination, the test results can be closer to the true value; comprehensive adjustment of the inertia disk and the rotation speed can more flexibly meet various torque requirements and adapt to complex and changeable test conditions. The inertia disk combination can be selected more flexibly based on previous test data and actual results. Experience can help testers more quickly determine which inertia disk combination is more suitable for specific test conditions, improve test efficiency and accuracy, and the flexibility of the present invention is higher.

[0028] Reference Figure 3 As shown, in the present invention, according to the test requirements, when the number of inertia disks of the combined inertia disk is adjusted, the required number of inertia disks is selected, and the inertia disks are slid one by one, and slide to contact with the flange 14 through the guide rod 15, and finally the inertia disk that has been moved to one side of the flange and the remaining inertia disk on the semicircular support are locked by the second fixing device 16 and the first fixing device 13 respectively, so as to complete the adjustment of the inertia disk. Further preferably, a guide groove 18 cooperating with the guide rod 15 is provided on the inertia disk, and the precision of movement and the stability of fixation can be achieved through the design of the guide groove. This adjustment method is simple and flexible, and can quickly realize the change of the combination of inertia disks according to different test conditions to meet the diverse test requirements. And the inertia disk can also be used to simulate different load conditions. By adjusting the combination of inertia disks, the operation state of the mechanical system under no-load, full load or different load conditions can be simulated, providing an important reference basis for the design and optimization of products.

[0029] Further preferably, a plurality of guide rods 15 and second fixing devices 16 are provided on one side of the flange for adjusting the number of combined inertia discs, so as to achieve adjustment and fixation of the inertia discs.

[0030] In the present invention, the first clutch, the inertia assembly and the second clutch are all provided with a protective cover.

[0031] The specific working process of the present invention is as follows: for the first test, a suitable inertia disc combination should be selected. According to the test allowable speed and impact torque requirements, combined with the clutch engagement time, the required combined inertia can be calculated, and the combination can also be selected based on experience in the later stage; the combination adjustment method of the inertia disc is as follows: when adjusting the inertia disc, loosen the nut of the first fixing device 13, select the number of required inertia discs according to the requirements, slide the inertia discs one by one, and after the inertia discs are separated from the semicircular support, they will slide along the guide surface of the guide shaft and cooperate with the rectangular key guide distributed on the circumference of the guide shaft. The bolt holes on the inertia discs pass through the screws on the guide shaft and slide to contact the flange of the guide shaft. Finally, the inertia discs that have been moved to one side of the flange and the remaining inertia discs on the semicircular support are locked by nuts to complete the adjustment of the inertia discs. The adjustment method can quickly change the combination of inertia discs according to different test requirements to meet the needs of various mechanical tests. At the same time, through precise adjustment, it can be ensured that the inertia discs can provide accurate inertia force during the test process, thereby improving the reliability of the test results.

[0032] Install the protective cover of the inertia disc, adjust the clutch power on and off, disconnect the electromagnetic second clutch, connect the first clutch, start the motor, and the motor drives the inertia disc connected to one end of the clutch through the coupling and the first clutch. When the whole rotates to the set speed (the speed is measured by the motor encoder), disconnect the first clutch, disconnect the motor power, start the second clutch, and the inertia disc drives the second clutch. The power is finally transmitted to the measured part through the torque flange, completing an impact on the measured part. During the impact process, the torque flange records the instantaneous torque value of the impact, transmits the data to the test bench system, disconnects the second clutch, and a cycle of impact conditions ends.

[0033] The technical principle of the present invention is described above in combination with the specific embodiments, which are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. Those skilled in the art can think of other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. An adjustable inertia torsional impact test bench system, characterized in that: The invention comprises a base, and a three-phase asynchronous motor, a first coupling, a first clutch, a second coupling, an inertia component, a second clutch, a power transfer shaft and a rigid coupling which are sequentially connected on the base, wherein the rigid coupling is connected to a torque sensor, and the torque sensor is connected to a test piece; and the inertia component can be adjusted according to test requirements to adapt to different working condition tests.

2. The adjustable inertia torsional impact test bench system according to claim 1, characterized in that: The inertia component includes a guide shaft, a bearing seat is respectively arranged on both sides of the guide shaft, a combined inertia disk and a flange are arranged between the two bearing seats, the combined inertia disk is locked by a first fixing device, and a guide rod and a second fixing device are arranged on one side of the flange.

3. The adjustable inertia torsional impact test bench system according to claim 2, characterized in that: The inertia assembly also includes an arc-shaped support for supporting the combined inertia disk located above the arc-shaped support.

4. The adjustable inertia torsional impact test bench system according to claim 3, characterized in that: The combined inertia disc is composed of a plurality of inertia discs, and there is a gap between the shaft hole of the inertia disc and the guide shaft.

5. The adjustable inertia torsional impact test bench system according to claim 4, characterized in that: During the test: select the appropriate inertia combination according to the equipment working conditions, disconnect the second clutch, connect the first clutch, start the three-phase asynchronous motor, and after the overall rotation reaches the set speed, disconnect the first clutch, disconnect the motor power supply, start the second clutch, the inertia plate drives the second clutch, and the power is finally transmitted to the test piece through the torque flange, completing an impact on the test piece.

6. The adjustable inertia torsional impact test bench system according to claim 5, characterized in that: When adjusting the number of inertia disks of the combined inertia disk, the required number of inertia disks is selected, and the inertia disks are slid one by one through the guide rod until they contact the flange. Finally, the inertia disk that has been moved to one side of the flange and the remaining inertia disks on the semicircular support are locked by the second fixing device and the first fixing device respectively, thereby completing the adjustment of the inertia disk.

7. The adjustable inertia torsional impact test bench system according to claim 6, characterized in that: A plurality of guide rods and a second fixing device are arranged on one side of the flange, which are used to adjust the number of combined inertia discs.

8. The adjustable inertia torsional impact test bench system according to claim 7, characterized in that: The inertia disk is provided with a guide groove which cooperates with the guide rod.

9. The adjustable inertia torsional impact test bench system according to claim 8, characterized in that: The first clutch, the inertia assembly and the second clutch are all provided with a protective cover.

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