Load test equipment

Abstract

The utility model provides a load test device, which comprises a mounting seat, a test device, a test device and a control device, and is characterized in that the mounting seat is used for mounting a to-be-tested component; the rotating part is rotatably arranged around a preset axis, the end part of the rotating part is connected with the to-be-tested part, and the rotating part is a magnetic conductive part; the magnetic assembly is arranged on the side of the rotating part, a preset interval is formed between the magnetic assembly and the rotating part, the magnetic assembly comprises a magnetic part, the magnetic part is opposite to the rotating part, and the magnetic part exerts acting force on the rotating part so that the rotating part can exert acting force on the to-be-tested part; and the magnetic force between the magnetic component and the rotating component is adjustably arranged. The problems that the rotating speed of the spindle is limited and the load performance of the bearing box cannot be accurately obtained due to the fact that the pressurizing equipment is in contact with the spindle for pressure testing when the bearing box performance is tested in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing box performance testing, in particular to a load testing device. Background Art

[0002] Bearing housings (bearing seats or housings) are components used to support bearings, providing a fixed and stable mounting environment for the bearings. Therefore, bearing housings are crucial in various types of mechanical equipment. For example, in a slicer, the main roller unit includes a cutting roller. The bearing housing is installed in the mounting holes of the cutting chamber frame. The two ends of the cutting roller are connected to the bearing housings, driving the cutting roller's rotation. Therefore, the performance of the bearing housing is particularly important for mechanical equipment.

[0003] In the prior art, in order to test the load that the bearing box can withstand during rotation, most of the methods use cylinder hydraulics or other mechanical structures that contact the main shaft to apply load to the main shaft, thereby testing the performance of the bearing box.

[0004] However, when pressurizing by contacting the main shaft, the friction between the main shaft and the pressurizing device will cause the contact surface to heat up and wear seriously, which will greatly limit the speed of the main shaft and make it impossible to accurately obtain the load performance of the bearing box. Utility Model Content

[0005] The main purpose of the utility model is to provide a load testing device to solve the problem in the prior art that when testing the bearing box performance, the pressurizing device contacts the main shaft for pressure testing, which limits the main shaft speed and makes it impossible to accurately obtain the load performance of the bearing box.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a load testing device is provided, including: a mounting seat for mounting a component to be tested; a rotating component, which is rotatably arranged around a predetermined axis, and the end of the rotating component is connected to the component to be tested, and the rotating component is a magnetic conductive component; a magnetic component, which is arranged on the side of the rotating component and has a preset interval between the rotating component, and the magnetic component includes a magnetic component, the magnetic component is opposite to the rotating component, and the magnetic component applies a force to the rotating component so that the rotating component applies a force to the component to be tested; wherein the size of the magnetic force between the magnetic component and the rotating component can be adjusted.

[0007] Furthermore, the magnetic component is located opposite to the middle of the rotating component.

[0008] Furthermore, the rotating component is a shaft structure, and the magnetic component includes: a magnetic end face, opposite to the rotating component, the magnetic end face is an arcuate surface, and the center of the circumferential surface where the arcuate surface is located coincides with the axis line of the rotating component.

[0009] Furthermore, the magnetic component is an electropermanent magnetic chuck, and the magnetic assembly further includes: a magnetic conductive component detachably arranged on the electropermanent magnetic chuck, the magnetic conductive component is opposite to the rotating component, and the magnetic end face is arranged on the magnetic conductive component.

[0010] Furthermore, the load test equipment further includes: a protective component, which is sleeved on the rotating component, the magnetic component is opposite to the protective component, and the protective component is made of a high resistivity material.

[0011] Furthermore, the protective component is a silicon steel sheet or a soft magnetic ferrite or a metal soft magnetic material.

[0012] Furthermore, the size of the preset interval can be adjusted, or the size of the current in the magnetic component can be adjusted.

[0013] Furthermore, the magnetic component is movably arranged in a direction close to or away from the rotating component to adjust the size of the preset interval.

[0014] Furthermore, the load testing equipment also includes: a moving component, which is arranged on the side of the rotating part, the magnetic component is connected to the moving component, and at least a part of the moving component is movably arranged in a direction close to or away from the rotating part to drive the magnetic component to move.

[0015] Furthermore, the moving component includes: a piston rod, which is arranged on the side of the rotating part, the piston rod is telescopically arranged, and the magnetic part is arranged at the driving end of the piston rod; or, a moving block, which is movably arranged in a direction close to or away from the rotating part, and the magnetic part is connected to the moving block.

[0016] According to the technical solution of the present invention, the load test equipment includes a mounting seat, a rotating component, and a magnetic assembly. The mounting seat is used to mount the component to be tested. The end of the rotating component is connected to the component to be tested, and the rotating component is a magnetic conductive component. The magnetic assembly is arranged on the side of the rotating component and has a preset interval between the rotating component. The magnetic assembly includes a magnetic component, which is opposite to the rotating component and applies a force to the rotating component so that the rotating component applies a force to the component to be tested. The magnitude of the magnetic force between the magnetic component and the rotating component is adjustable. The electromagnetic force applied to the rotating component by the magnetic component is applied to the rotating component to achieve non-contact pressure on the rotating component. At the same time, the magnitude of the magnetic force between the magnetic component and the rotating component is adjustable, and the magnitude of the force applied to the rotating component can be adjusted, thereby eliminating the need to limit the rotation speed of the rotating component, accurately simulating the radial force and bending moment applied to the bearing box, and improving the test accuracy of the load performance of the component to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of an embodiment of a load testing device according to the present invention is shown;

[0019] Figure 2 shows a side view of a load testing device according to the present invention;

[0020] Figure 3 shows a top view of a load testing device according to the present invention;

[0021] Figure 4 Shown according to Figure 3 Cross-section of the mid-CC plane;

[0022] Figure 5 Shown according to Figure 4 Enlarged view of part A.

[0023] The above drawings include the following reference numerals:

[0024] 1. Mounting base; 2. Rotating component; 20. Protective component; 3. Magnetic assembly; 30. Magnetic component; 301. Magnetic end face; 31. Magnetic conductive component; 4. Moving assembly; 40. Piston rod; 41. Slide rail; 5. Base; 6. Moving base. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] As mentioned in the background technology, when the performance test of the bearing box is currently carried out, the main shaft or main roller (taking the main shaft as an example) is first connected to the bearing box. During the rotation of the main shaft, a force is applied to the main shaft, thereby testing the load that the bearing box can withstand during the rotation of the main shaft. The existing technology applies force to the main shaft mainly by applying pressure with the main shaft. However, due to the high-speed rotation of the main shaft, the contact pressure with the main shaft easily causes friction and heat between the pressure device and the main shaft, which limits the rotation speed of the main shaft and makes it impossible to obtain accurate test results. Therefore, in response to the above technical problems, in the load testing equipment provided by the present application, after the bearing box is installed on the mounting seat 1, it is connected to the two ends of the rotating component 2. The rotating component 2 is rotatably arranged around a predetermined axis. By applying a force to the rotating component 2, the load performance of the bearing box is tested. Furthermore, the rotating component 2 is a magnetic conductive member, and the magnetic assembly 3 is disposed to the side of the rotating component 2 with a preset spacing therebetween. A force is applied to the rotating component 2 via the magnetic assembly 3. Under the premise that the magnetic assembly 3 and the rotating component 2 are not in contact, the force applied to the rotating component 2 is simulated by magnetic force, thereby reflecting the load borne by the bearing housing. Specifically, the magnetic assembly 3 includes a magnetic component 30, which applies a force to the rotating component 2. When the magnetic component 30 is energized, magnetic coupling occurs between the magnetic component 30 and the rotating component 2, applying a force to the rotating component 2, thereby achieving a contactless pressure effect on the rotating component 2. At the same time, the magnetic force of the magnetic component 30 can be adjusted to adjust the magnetic induction intensity between the magnetic component 30 and the rotating component 2, so that the rotating component 2 bears forces of different sizes, simulating the radial force and bending moment of the bearing box, thereby verifying the service life and reliability of the bearing box under high speed and different load conditions, avoiding the vibration generated by the high-speed rotation of the rotating component 2, affecting the accuracy of the test signal, and the problem that the interference signal is difficult to separate. There is no limit on the rotation speed of the rotating component 2, and the load test result of the bearing box can be accurately obtained.

[0027] Please refer to Figures 1 to 5 The utility model provides a load testing device, including: a mounting base 1 for mounting a component to be tested; a rotating component 2, rotatably arranged around a predetermined axis, the end of the rotating component 2 being connected to the component to be tested, and the rotating component 2 being a magnetic conductive component; a magnetic component 3, arranged on the side of the rotating component 2 and having a preset interval between the rotating component 2, the magnetic component 3 including a magnetic component 30, the magnetic component 30 being opposite to the rotating component 2, and the magnetic component 30 applying a force to the rotating component 2 so that the rotating component 2 applies a force to the component to be tested; wherein the magnitude of the magnetic force between the magnetic component 30 and the rotating component 2 can be adjusted.

[0028] The load testing apparatus provided by the present application includes a mounting base 1, a rotating component 2, and a magnetic assembly 3. The mounting base 1 is used to mount a component to be tested. The end of the rotating component 2 is connected to the component to be tested. The rotating component 2 is a magnetic conductive member. The magnetic assembly 3 is arranged to the side of the rotating component 2 and has a preset interval between the rotating component 2. The magnetic assembly 3 includes a magnetic component 30. The magnetic component 30 is opposite to the rotating component 2 and applies a force to the rotating component 2 so that the rotating component 2 applies a force to the component to be tested. The magnitude of the magnetic force between the magnetic component 30 and the rotating component 2 is adjustable. The electromagnetic force applied by the magnetic component 30 to the rotating component 2 is applied by the magnetic component 30 to achieve non-contact pressure on the rotating component 2. The magnetic force between the magnetic component 30 and the rotating component 2 is adjustable, and the magnitude of the force applied to the rotating component 2 can be adjusted. This eliminates the need to limit the rotation speed of the rotating component 2, accurately simulates the radial force and bending moment applied to the bearing housing, and improves the test accuracy of the load performance of the component to be tested.

[0029] It should be noted that the component under test is a workpiece connected to and supporting the rotating component 2. The component under test can rotate with the rotating component 2 or move relative to the rotating component 2. For example, the rotating component 2 is supported at both ends by bearings, in which case the component under test is a bearing housing. Alternatively, the rotating component 2 is supported at both ends by rolling elements or sliding blocks, in which case the component under test is a rolling element or sliding block.

[0030] Specifically, the magnetic component 30 is opposite to the middle of the rotating component 2. When the magnetic component 30 generates electromagnetic attraction on the rotating component 2, the force on the rotating component 2 is more uniform, thereby applying uniform force to the components to be tested at both ends of the rotating component 2.

[0031] In one embodiment provided in this application, Figure 4 and Figure 5 As shown, the rotating component 2 is a shaft structure, and the magnetic component 30 includes a magnetic end surface 301, which is opposite the shaft structure. The magnetic end surface 301 is an arc-shaped surface, and the center of the circular surface of the arc surface coincides with the axis of the shaft structure. Since the rotating component 2 is a shaft structure, in order to ensure that the magnetic component 30 applies a uniform force to the shaft structure, the arc-shaped magnetic end surface 301 is provided, and the center of the circular surface of the arc surface coincides with the axis of the shaft structure. This arrangement ensures uniform attraction of the magnetic component 30 to the shaft structure.

[0032] In another embodiment provided by the present application, in order to ensure that the magnetic component 30 has a strong magnetic force, the magnetic component 30 is an electropermanent magnetic chuck, and the magnetic assembly 3 further includes: a conductive component 31, which is detachably mounted on the electropermanent magnetic chuck, the conductive component 31 being opposite to the rotating component 2, and a magnetic end face 301 being provided on the conductive component 31, the magnetic end face 301 being opposite to the rotating component 2; the magnetic end face 301 being an arcuate surface, the center of the circumferential surface of the arcuate surface coinciding with the axis of the rotating component 2. Since the electropermanent magnetic chuck is a disk structure, when it directly acts on the rotating component 2, the suction force generated cannot be uniformly applied to the rotating component 2. Therefore, a conductive component 31 is provided on the electropermanent magnetic chuck, and a magnetic end face 301 is provided on the conductive component 31. The arcuate magnetic end face 301 is used to achieve uniform suction on the rotating component 2. The conductive component 31 can be replaced according to the size of the rotating component 2.

[0033] To mitigate damage to rotating component 2 caused by electromagnetic eddy currents during the test, the load test equipment also includes a protective component 20, which is mounted on rotating component 2. The magnetic component 30 faces the protective component 20, and the protective component 20 is made of a high-resistivity material. This high-resistivity material reduces the eddy current heating generated by the magnetic lines of force cut during the high-speed rotation of the rotating component 2, thus meeting the requirements of engineering applications.

[0034] Preferably, the protective component 20 is a silicon steel sheet or a soft ferrite or a metal soft magnetic material. When the protective component 20 is a silicon steel sheet, the silicon steel sheets are provided in plurality, and the plurality of silicon steel sheets are stacked and placed on the rotating component 2 and then fastened by a tight sleeve.

[0035] In the present application, the size of the preset interval is adjustable, or the current in the magnetic component 30 is adjustable. By adjusting the size of the preset interval or the current in the magnetic component 30, the force between the magnetic component 30 and the rotating component 2 is adjusted, thereby applying different forces to the component under test, simulating the state of the component under test when receiving different loads, thereby verifying the service life and reliability of the component under test under high speed and different load conditions, and improving the accuracy of the load test of the component under test. When the magnetic component 30 is a permanent magnet component, the force between the permanent magnet component and the rotating component 2 is adjusted by adjusting the size of the preset interval. At this time, the variable adjusted by the current in the magnetic component 30 is the direction of the magnetic field. When the magnetic component 30 is an electromagnetic component, it is preferred to adjust the force applied to the rotating component 2 by adjusting the current in the electromagnetic component. Of course, when the magnetic component 30 is an electromagnetic component, the magnetic force can also be adjusted by adjusting the size of the preset interval.

[0036] Specifically, the magnetic component 30 is movable in a direction toward or away from the rotating component 2 to adjust the size of the preset gap. The preset gap between the magnetic component 30 and the rotating component 2 is an air gap. By varying the size of the air gap between the magnetic component 30 and the rotating component 2, the strength of the magnetic force is affected, thereby adjusting the attractive force on the rotating component 2. In this embodiment, the magnetic component 30 is preferably a permanent magnet.

[0037] In the specific implementation process, Figures 1 to 3 As shown, the load testing apparatus further includes a moving assembly 4 disposed to the side of the rotating component 2. The magnetic assembly 3 is connected to the moving assembly 4. At least a portion of the moving assembly 4 is movable in a direction toward or away from the rotating component 2 to drive the magnetic assembly 3 to move. By connecting the moving assembly 4 to the magnetic assembly 3, the moving assembly 4 drives the magnetic assembly 3 to move, thereby adjusting the size of the air gap and changing the attractive force of the magnetic assembly 3 on the rotating component 2.

[0038] Specifically, the moving assembly 4 includes: a piston rod 40, which is arranged on the side of the rotating part 2, the piston rod 40 is telescopically arranged, and the magnetic part 30 is arranged at the driving end of the piston rod 40; or, a moving block, which is movably arranged in a direction close to or away from the rotating part 2, and the magnetic part 30 is connected to the moving block. The magnetic part 30 is driven to move in a direction close to or away from the rotating part 2 by the piston rod 40. Preferably, the moving assembly 4 includes a driving cylinder or a hydraulic cylinder or an electric push rod, and the piston rod 40 is the piston rod of the driving cylinder or the hydraulic rod of the hydraulic cylinder or the electric push rod. Alternatively, the moving assembly 4 also includes a slide rail 41, a slider is provided on the slide rail 41, the magnetic part 30 is connected to the slider, and the magnetic part 30 is guided by the cooperation of the slider and the slide rail 41.

[0039] It should be noted here that the moving component 4 is not limited to structures such as a motor, a lead screw, a slide rail, hydraulic pressure, pneumatic pressure or a gear rack.

[0040] The load test equipment also includes a base 5, on which the mounting base 1 and the rotating component 2 are respectively mounted; a movable base 6, which is disposed to the side of the base 5 and on which the movable assembly 4 is mounted. Specifically, a slide rail 41 extends along the length of the movable base 6. The slide rail 41 does not contact the rotating component 2 and other structures on the base 5, leaving a certain gap between them.

[0041] The load test equipment of the present application uses electromagnetic loading, which is a non-contact loading method, while other loading methods are contact loading methods. In principle, other loading methods cannot overcome the problems of large contact friction heat and severe wear under large loading forces. Therefore, other loading methods limit the loading speed and are suitable for static loading or low-speed loading. The speed is greatly increased and suitable for high-speed working conditions. The requirements for structural design are not high, similar to magnetic levitation, avoiding the vibration caused by high-speed rotation. Other loading methods have high requirements for structural design, strict contact fit, large contact vibration at high speed, affecting the accuracy of the test signal, and the interference signal is not easy to separate. The vibration is low, the operation is smooth, the signal is accurate, and it is suitable for test data collection. The electromagnetic loading method is not limited by the speed and loading force, the structure itself is consistent, and it is easy to modify. It has good adaptability to high speed and large loading force. Other methods have a small speed range. To increase the speed, the structure needs to be deeply changed, the modification is difficult, the versatility is reduced, but the application scalability is good, the function extension is strong, and the modification cost is low.

[0042] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0043] The load testing apparatus provided by the present application includes a mounting base 1, a rotating component 2, and a magnetic assembly 3. The mounting base 1 is used to mount a component to be tested. The end of the rotating component 2 is connected to the component to be tested. The rotating component 2 is a magnetic conductive member. The magnetic assembly 3 is arranged to the side of the rotating component 2 and has a preset interval between the rotating component 2. The magnetic assembly 3 includes a magnetic component 30. The magnetic component 30 is opposite to the rotating component 2 and applies a force to the rotating component 2 so that the rotating component 2 applies a force to the component to be tested. The magnitude of the magnetic force between the magnetic component 30 and the rotating component 2 is adjustable. The electromagnetic force applied by the magnetic component 30 to the rotating component 2 is applied by the magnetic component 30 to achieve non-contact pressure on the rotating component 2. The magnetic force between the magnetic component 30 and the rotating component 2 is adjustable, and the magnitude of the force applied to the rotating component 2 can be adjusted. This eliminates the need to limit the rotation speed of the rotating component 2, accurately simulates the radial force and bending moment applied to the bearing housing, and improves the test accuracy of the load performance of the component to be tested.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A load testing device, characterized in that: include: A mounting base (1) for mounting a component to be tested; A rotating component (2) is rotatably arranged around a predetermined axis, an end of the rotating component (2) is connected to the component to be measured, and the rotating component (2) is a magnetic conductive component; A magnetic component (3) is arranged on the side of the rotating component (2) and has a preset interval between the rotating component (2), the magnetic component (3) includes a magnetic component (30), the magnetic component (30) is opposite to the rotating component (2), and the magnetic component (30) applies a force to the rotating component (2), so that the rotating component (2) applies a force to the component to be tested; The magnitude of the magnetic force between the magnetic component (30) and the rotating component (2) is adjustable.

2. The load testing device according to claim 1, characterized in that: The magnetic component (30) is located opposite to the middle of the rotating component (2).

3. The load testing device according to claim 1, characterized in that: The rotating component (2) is a shaft structure, and the magnetic component (30) includes: The magnetic end surface (301) is opposite to the shaft structure, and the magnetic end surface (301) is an arc-shaped surface, and the center of the circumferential surface where the arc-shaped surface is located coincides with the axis center line of the shaft structure.

4. The load testing device according to claim 1, characterized in that: The magnetic component (30) is an electro-permanent magnetic chuck, and the magnetic assembly (3) further comprises: A magnetic conductive component (31) is detachably arranged on the electropermanent magnetic chuck, the magnetic conductive component (31) is opposite to the rotating component (2), and a magnetic end surface (301) is provided on the magnetic conductive component (31), and the magnetic end surface (301) is opposite to the rotating component (2); The magnetic end surface (301) is an arcuate surface, and the center of the circumferential surface where the arcuate surface is located coincides with the axis of the rotating component (2).

5. The load testing device according to claim 1, characterized in that: The load testing equipment further comprises: The protective component (20) is sleeved on the rotating component (2), the magnetic component (30) is opposite to the protective component (20), and the protective component (20) is made of a high resistivity material.

6. The load testing device according to claim 5, characterized in that: The protective component (20) is a silicon steel sheet, a soft magnetic ferrite, or a metal soft magnetic material.

7. The load testing device according to claim 1, characterized in that: The size of the preset interval can be adjusted, or the size of the current in the magnetic component (30) can be adjusted.

8. The load testing device according to claim 1, characterized in that: The magnetic component (30) is movably arranged in a direction close to or away from the rotating component (2) to adjust the size of the preset interval.

9. The load testing device according to claim 1, characterized in that: The load testing equipment further comprises: A movable assembly (4) is arranged on the side of the rotating component (2), the magnetic assembly (3) is connected to the movable assembly (4), and at least a portion of the movable assembly (4) is movably arranged in a direction close to or away from the rotating component (2) to drive the magnetic assembly (3) to move.

10. The load testing device according to claim 9, characterized in that: The mobile component (4) comprises: A piston rod (40) is arranged on the side of the rotating component (2), the piston rod (40) is arranged telescopically, and the magnetic component (30) is arranged at the driving end of the piston rod (40); or, The moving block is movably arranged in a direction close to or away from the rotating component (2), and the magnetic component (30) is connected to the moving block.

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