A dynamic load test platform for thin-walled bearing rings

Abstract

The present invention discloses a dynamic load test platform for thin-walled bearing rings, which is based on the load experiment of bearing parts. Specifically, it simulates the operation process of bearing parts. In essence, it drives the inner ring structure in the bearing parts to rotate continuously. However, the difference from the conventional simulation method is that: the coupling assembly is optimized. On the basis of not interfering with the normal rotation of the coupling assembly, a triangular position clamping structure and its internal movable arc block and fixed arc seat are optimized. The influence of the centrifugal force generated during the rotation of the coupling assembly on the movement of the built-in ball is utilized. In the specific test process, first, the movement process of the built-in ball is directly interfered by changing the rotation state of the coupling assembly. Finally, the movable arc block conducts vibration feedback on the inner ring in the bearing parts. The key lies in forming a dynamic simulation method, thereby changing the load capacity of the bearing parts during operation, shortening the test cycle, and not causing an additional working burden on the drive structure.

Description

Technical Field

[0001] The present invention relates to the technical field of load testing, and particularly to a dynamic load testing platform for thin-walled bearing rings. Background Art

[0002] Thin-walled bearings achieve low friction torque and high rotational accuracy, meeting the stringent requirements of high-precision equipment. Specifically, high-strength materials are combined with precision machining to reduce friction and energy consumption during operation and extend the service life. Reference can be made to the relevant content in the publication numbers CN116696934A and CN115435018A.

[0003] The service life / usage effect of thin-walled bearings is specifically related to the structural characteristics and material characteristics in the design scheme. For this, further experiments are required during the production process. Reference can be made to the relevant content in the publication number CN113532856A. Its essence is to simulate the load state during operation and obtain relevant parameters (vibration frequency, temperature, etc.). However, it should be noted that:

[0004] In the conventional experimental process, the inner ring is driven by a driving structure for simulated rotation. This method is relatively single and the cycle is relatively long, making it difficult to meet the simulation requirements under complex load conditions. Moreover, when simulating complex load conditions, it will additionally increase the working burden of the driving structure during the testing process. For this, the present application proposes a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a dynamic load testing platform for thin-walled bearing rings. In view of the load testing process of thin-walled bearings, the conventional simulation methods are relatively single and the cycle is long. The key lies in the difficulty of meeting the simulation requirements under complex load conditions, and when using complex load simulation, it will also additionally increase the working burden of the driving structure during the testing process.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A dynamic load testing platform for thin-walled bearing rings, including a driving assembly and a working base. A bearing to be tested is arranged inside the working base, and a coupling assembly corresponding to the bearing to be tested is installed at the output end of the driving assembly;

[0007] The coupling assembly consists of a mounting half shaft and a clamping seat shaft. A triangular clamping structure is formed between the clamping seat shaft and the mounting half shaft. The triangular clamping structure includes a movable arc block and a fixed arc seat. The movable arc block and the fixed arc seat are provided with internal balls, and the outer wall of the movable arc block matches the inner wall of the bearing to be tested. A plurality of sensing probes corresponding to the bearing to be tested are installed outside the working base.

[0008] Further set as: The installation half shaft is connected to the bearing part to be measured through a pin slot, the clamping seat shaft is sleeved on the installation half shaft through a bolt structure, and the coupling assembly maintains a rotatable connection state with the working base.

[0009] Further set as: The fixed arc seat is fixedly connected to the clamping seat shaft, and the movable arc block is rotatably connected to the fixed arc seat.

[0010] Further set as: The outer wall curved surface diameter of the movable arc block is smaller than the inner wall diameter of the bearing part to be measured, and a plurality of collision beads are installed on the outer wall curved surface of the movable arc block.

[0011] Further set as: An arc-shaped chute corresponding to the built-in ball is provided at the inner wall curved surface position of the movable arc block, and a straight chute corresponding to the built-in ball is provided at the outer wall position of the fixed arc seat.

[0012] Further set as: The arc length of the fixed arc seat is equal to the arc length of the triangular position clamping structure, and the arc length of the movable arc block is smaller than the arc length of the triangular position clamping structure.

[0013] Further set as: The rotation point between the movable arc block and the fixed arc seat is located at the middle position of the movable arc block and the fixed arc seat.

[0014] Further set as: The cross-section of the arc-shaped chute along the longitudinal direction of the coupling assembly is semi-circular, and the center point of the cross-section of the arc-shaped chute is on the same axis as the center point of the coupling assembly. The cross-section of the straight chute along the longitudinal direction of the coupling assembly is horizontal, and the opening direction of the straight chute is perpendicular to the diameter direction of the coupling assembly.

[0015] Further set as: The diameter of the built-in ball is equal to the upper limit of the distance between the arc-shaped chute and the straight chute.

[0016] The present invention has the following beneficial effects:

[0017] 1. For the testing process of thin-walled bearings, specifically, the driving structure is used as the power source to drive the inner ring structure in the bearing part to rotate directionally to simulate the operation process of the bearing part. However, the obvious difference from the conventional simulation method is that the overall state optimizes the process of power output to obtain the coupling assembly structure. On the basis of not interfering with the normal rotation of the coupling assembly, the triangular position clamping structure and the movable arc block and fixed arc seat inside it are optimized. The influence of the centrifugal force generated during the rotation of the coupling assembly on the movement of the built-in ball is used to change the load state of the inner ring structure of the bearing part during the basic simulation process;

[0018] 2. Based on the above content, form the action influence relationship among the built-in ball - movable arc block - inner ring of the bearing. First, directly interfere with the movement process of the built-in ball by changing the rotation state of the coupling assembly, and finally perform vibration feedback on the inner ring of the bearing through the movable arc block. The key lies in forming a dynamic simulation method. When the movable arc block makes an adaptive deflection, it will cause varying degrees of changes to the inner ring of the bearing, simulating a relatively complex operating state, shortening the test cycle, and not imposing an additional workload on the drive structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of a dynamic load test platform for a thin - wall bearing ring proposed by the present invention;

[0021] Figure 2 Exploded view of the working base in a dynamic load test platform for a thin - wall bearing ring proposed by the present invention;

[0022] Figure 3 Axial sectional view of the working base in a dynamic load test platform for a thin - wall bearing ring proposed by the present invention;

[0023] Figure 4 Structural schematic diagram of the coupling assembly in a dynamic load test platform for a thin - wall bearing ring proposed by the present invention;

[0024] Figure 5 In a dynamic load test platform for a thin - wall bearing ring proposed by the present invention Figure 4 Exploded view;

[0025] Figure 6 Exploded view of the clamping seat shaft in a dynamic load test platform for a thin - wall bearing ring proposed by the present invention;

[0026] Figure 7 Axial sectional view of the clamping seat shaft in a dynamic load test platform for a thin - wall bearing ring proposed by the present invention.

[0027] In the figure: 1, working base; 2, sensing probe; 3, coupling assembly; 301, mounting half - shaft; 302, clamping seat shaft; 4, drive assembly; 5, movable arc block; 501, arc - shaped chute; 6, fixed arc seat; 601, straight chute; 7, built - in ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0029] Embodiment 1: For the load test process of thin-walled bearings, the conventional simulation methods are relatively single and the cycle is long. The key lies in the difficulty of meeting the simulation requirements under the composite load state, and the working burden of the driving structure in the test process will be additionally increased during the simulation process of the composite load. Therefore, the following technical solutions are proposed:

[0030] Refer to Figures 1 to 7 , a dynamic load test platform for a thin-walled bearing ring in this embodiment includes a driving assembly 4 and a working base 1. A bearing component to be tested is arranged inside the working base 1, and a coupling assembly 3 corresponding to the bearing component to be tested is installed at the output end of the driving assembly 4;

[0031] The coupling assembly 3 is composed of a mounting half shaft 301 and a clamping seat shaft 302. A triangular clamping structure is formed between the clamping seat shaft 302 and the mounting half shaft 301. The triangular clamping structure includes a movable arc block 5 and a fixed arc seat 6. The movable arc block 5 and the fixed arc seat 6 are provided with internal balls 7, and the outer wall of the movable arc block 5 matches the inner wall of the bearing component to be tested;

[0032] A plurality of sensing probes 2 corresponding to the bearing component to be tested are installed outside the working base 1. The mounting half shaft 301 is connected to the bearing component to be tested through a pin slot. The clamping seat shaft 302 is sleeved on the mounting half shaft 301 through a bolt structure. The coupling assembly 3 and the working base 1 maintain a rotating connection state. The fixed arc seat 6 is fixedly connected to the clamping seat shaft 302, and the movable arc block 5 is rotatably connected to the fixed arc seat 6.

[0033] Basic principle: A simple description of the load test process of the bearing component is as follows: Its essence is to simulate the working state of the bearing component with a motor structure, which is to drive the inner ring structure in the bearing component to rotate directionally. The overall process also needs to use various sensors to detect relevant parameters during the working process of the bearing component, such as temperature value, vibration frequency, rigid deformation degree, etc. This is combined with the Figure 1 in the present invention for explanation. The driving assembly 4 in the present invention is used to represent a conventional motor structure, and several sensing probes 2 are selected according to the specific requirements during the test process. The driving assembly and the coupling assembly 3 drive the inner ring in the bearing component to rotate continuously, and the sensing probes 2 are used for data feedback and collection. This part belongs to the conventional load test process and will not be elaborated in the present invention.

[0034] Embodiment 2: Based on the basic principle in Embodiment 1, a supplementary description is given for the operation process of the coupling assembly:

[0035] The outer wall curved surface diameter of the movable arc block 5 is smaller than the inner wall diameter of the bearing part to be measured, and a plurality of collision beads are installed on the outer wall curved surface of the movable arc block 5. An arc-shaped chute 501 corresponding to the built-in ball 7 is provided at the position of the inner wall curved surface of the movable arc block 5, and a straight chute 601 corresponding to the built-in ball 7 is provided at the position of the outer wall of the fixed arc seat 6. The arc length of the fixed arc seat 6 is equal to the arc length of the triangular position clamping structure, and the arc length of the movable arc block 5 is smaller than the arc length of the triangular position clamping structure. The rotation point between the movable arc block 5 and the fixed arc seat 6 is located at the middle position of the movable arc block 5 and the fixed arc seat 6;

[0036] The cross-section of the arc-shaped chute 501 along the longitudinal direction of the coupling assembly 3 is semi-circular, and the center point of the cross-section of the arc-shaped chute 501 is on the same axis as the center point of the coupling assembly 3. The cross-section of the straight chute 601 along the longitudinal direction of the coupling assembly 3 is horizontal, and the opening direction of the straight chute 601 is perpendicular to the diameter direction of the coupling assembly 3. The diameter of the built-in ball 7 is equal to the upper limit of the distance between the arc-shaped chute 501 and the straight chute 601.

[0037] Scheme description: Combined with Figure 2 and Figure 5 for description, the working base 1 is composed of a base and a cover. In the specific test process, the bearing part to be measured is directly installed on the mounting half shaft 301, and then the clamping seat shaft 302 is directly sleeved on the mounting half shaft 301 and fixed with a bolt structure. After the bearing part to be measured is placed in the base, the cover is fixed to the base with a bolt structure again. Thus, when the drive assembly 4 is started, the inner ring in the bearing part to be measured can be driven to rotate by the mounting half shaft 301, and the clamping seat shaft 302 will also rotate synchronously in this process;

[0038] Specifically combined with Figure 5 and Figure 6 for description, because the coupling assembly 3 is in a continuous rotation state during the test process, continuous centrifugal force will be generated. Under the action of the centrifugal force, it first acts on the built-in ball 7, which will cause the built-in ball 7 to deflect in a direction deviating from the center point of the coupling assembly 3. However, the built-in ball 7 will be blocked by the movable arc block 5. Therefore, the centrifugal force received by the built-in ball 7 will indirectly act on the movable arc block 5. The specific description is as follows:

[0039] S1: Taking Figure 7 for description, Figure 7The positions of the middle movable arc block 5 and the built-in ball 7 relative to the fixed arc seat 6 are represented as the initial positions. It is necessary to limit the built-in ball 7 so that it can just hold the fixed arc seat 6 and the movable arc block 5. For this limitation, the diameter of the built-in ball 7 is equal to the maximum distance between the fixed arc seat 6 and the movable arc block 5, that is, it is represented as the upper limit of the distance between the arc-shaped chute 501 and the straight chute 601. For this, it is necessary to limit the structural characteristics of the arc-shaped chute 501 and the straight chute 601. First, it is necessary to ensure that the built-in ball 7 has the ability to slide, and its key purpose is to change the distance between the arc-shaped chute 501 and the straight chute 601. Therefore, the present invention mainly makes structural limitations in the horizontal direction for the straight chute 601;

[0040] S2: If the coupling assembly 7 continues to rotate clockwise or counterclockwise, and the centrifugal force value received by the built-in ball 7 is proportional to the rotation speed of the coupling assembly 7. Under the action of the centrifugal force, the built-in ball 7 "deviates outward". In this process, in order to ensure that the distance between the arc-shaped chute 501 and the straight chute 601 is always equal to the diameter of the built-in ball 7, it indirectly causes the movable arc block 5 to rotate directionally, so as to Figure 7 For example, assume that the built-in ball 7 deflects in the clockwise direction. Then, in order to "make way" for the built-in ball 7, the movable arc block 5 will deflect counterclockwise along the rotation point between the fixed arc seat 6 and the movable arc block 5;

[0041] S3: Combine with the technical content in S2 again for description, and use Figure 7 for description. Because the socket shaft 302 and the mounting half shaft 301 maintain synchronous rotation, it can be understood that: the movable arc block 5 also rotates synchronously with the inner ring structure in the bearing part to be measured. And it is also necessary to further limit that there is a gap between the outer wall of the movable arc block 5 and the inner wall of the inner ring of the bearing part to be measured, and limit that the arc length of the movable arc block 5 is less than the arc length of the triangular position clamping structure. The purpose is to ensure that the movable arc block 5 has the ability to deflect in the fixed arc seat 6;

[0042] In the initial state, there will be no collision between the movable arc block 5 and the position of the inner ring of the bearing part to be measured. However, when the built-in ball 7 is affected by the centrifugal force and deflects directionally, it further drives the movable arc block 5 to deflect adaptively, resulting in the outer wall position of the movable arc block 5 hitting the inner wall of the inner ring in the bearing part to be measured. The purpose is to actively change the stress state of the inner ring in the bearing part to be measured during rotation. Specifically, based on the rotation process of the coupling assembly 3, the load-bearing capacity of the inner ring in the bearing part to be measured during rotation is actively changed.

[0043] Embodiment 3: Combine with the technical content in Embodiment 2 to make the following supplementary description of the present invention:

[0044] Solution description: For the load test process of the bearing part to be measured, the sensing probe 2 mentioned in the present invention is mainly used to detect the vibration frequency of the outer ring in the bearing part to be measured, and the overall test process is optimized as follows:

[0045] Static simulation: If a running process of a bearing part to be measured is simulated, its period is relatively long. In the present invention, mainly based on the coupling assembly 3, first, in the initial state, the coupling assembly 3 is rotated at a constant speed in a fixed direction, and this stage is represented as the static stage. Because in the overall static stage, the speed and direction of the coupling assembly 3 are constant, theoretically, the vibration frequency generated by the bearing part to be measured should be in a relatively balanced state. If there is an obvious mass position in the bearing part to be measured, the obtained vibration frequency will fluctuate significantly. Specifically, it needs to be combined with the vibration frequency obtained by the process parameter limitation in the bearing part to be measured, which will not be elaborated in the present invention;

[0046] Dynamic simulation: Different from the static simulation: the rotation speed and direction will change during the actual operation of the bearing part to be measured. First, a periodic simulation is carried out for the rotation process of the coupling assembly 3. For example, after maintaining the static simulation for 5 - 10 minutes, change the rotation speed or direction of the coupling assembly 3 at a cycle time of 2 - 5 minutes, and analyze the obtained vibration frequency during this process. It should be noted that: when the direction is constant but the rotation speed changes, the centrifugal force borne by the built-in ball 7 is greater, and it rolls a longer distance in the clockwise or counterclockwise direction, thereby further changing the impact force generated by the movable arc block 5 on the inner ring of the bearing part to be measured, or when the rotation speed is constant but the direction is switched, the sliding direction of the built-in ball 7 is different;

[0047] It can be directly understood that: specifically, in this way of dynamic simulation, the load capacity of the bearing part to be measured during operation is changed, and relevant parameters are obtained through data analysis. This process will not be elaborated in the present invention.

[0048] In summary: Based on the load experiment of the bearing part, specifically, the running process of the bearing part is simulated. In essence, it drives the inner ring structure in the bearing part to rotate continuously. However, different from the conventional simulation method: the coupling assembly is optimized. On the basis of not interfering with the normal rotation of the coupling assembly, the triangular position clamping structure and its internal movable arc block and fixed arc seat are optimized, and the influence of the centrifugal force generated during the rotation of the coupling assembly on the movement of the built-in ball is utilized;

[0049] Therefore, in the specific test process, first, the movement process of the built-in ball is directly interfered by changing the rotation state of the coupling assembly, and finally, the movable arc block conducts vibration feedback on the inner ring of the bearing part. The key lies in forming a dynamic simulation method, thereby changing the load capacity of the bearing part during operation, shortening the test cycle, and not causing an additional workload on the drive structure.

[0050] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they shall fall within the protection scope of the present invention.

[0051] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art of the present technology can well understand and utilize the present invention. The present invention is only limited by the claim book and its full scope and equivalents.

Claims

1. A dynamic load test platform for a thin-walled bearing ring, comprising a driving assembly (4) and a working base (1), characterized in that, A bearing part to be measured is arranged inside the working base (1), and a coupling assembly (3) corresponding to the bearing part to be measured is installed at the output end of the driving assembly (4); The coupling assembly (3) is composed of a mounting half shaft (301) and a clamping seat shaft (302). A triangular clamping structure is formed between the clamping seat shaft (302) and the mounting half shaft (301). The triangular clamping structure includes a movable arc block (5) and a fixed arc seat (6). The movable arc block (5) and the fixed arc seat (6) are provided with built-in balls (7), and the outer wall of the movable arc block (5) matches the inner wall of the bearing part to be measured. A plurality of sensing probes (2) corresponding to the bearing part to be measured are installed outside the working base (1); An arc-shaped chute (501) corresponding to the built-in ball (7) is formed at the inner wall curved surface position of the movable arc block (5), and a straight chute (601) corresponding to the built-in ball (7) is formed at the outer wall position of the fixed arc seat (6). The arc length of the fixed arc seat (6) is equal to the arc length of the triangular clamping structure, and the arc length of the movable arc block (5) is less than the arc length of the triangular clamping structure. The cross-section of the arc-shaped chute (501) along the longitudinal direction of the coupling assembly (3) is semi-circular, and the center point of the cross-section of the arc-shaped chute (501) is on the same axis as the center point of the coupling assembly (3). The cross-section of the straight chute (601) along the longitudinal direction of the coupling assembly (3) is horizontal, and the opening direction of the straight chute (601) is perpendicular to the diameter direction of the coupling assembly (3). The diameter of the built-in ball (7) is equal to the upper limit of the distance between the arc-shaped chute (501) and the straight chute (601).

2. The dynamic load test platform for a thin-walled bearing ring according to claim 1, characterized in that The mounting half shaft (301) is connected to the bearing part to be measured through a pin slot, and the clamping seat shaft (302) is sleeved on the mounting half shaft (301) through a bolt structure. The coupling assembly (3) and the working base (1) maintain a rotational connection state.

3. The dynamic load test platform for a thin-walled bearing ring according to claim 1, characterized in that, The fixed arc seat (6) is fixedly connected to the clamping seat shaft (302), and the movable arc block (5) is rotatably connected to the fixed arc seat (6).

4. A dynamic load test platform for a thin-walled bearing ring according to claim 1, characterized in that, The diameter of the outer wall curved surface of the movable arc block (5) is smaller than the inner wall diameter of the bearing part to be measured, and a plurality of bump beads are installed on the outer wall curved surface of the movable arc block (5).

5. A dynamic load test platform for a thin-walled bearing ring according to claim 1, characterized in that The rotation point between the movable arc block (5) and the fixed arc seat (6) is located at the middle position of the movable arc block (5) and the fixed arc seat (6).

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