Magnetic force testing tooling

Abstract

The present application relates to the technical field of magnetic force testing equipment, and provides a magnetic force testing tooling. The magnetic force testing tooling includes a base body, a force measuring component, a first mounting component, and a second mounting component. The first mounting component is used for mounting a first magnetic part to be tested; the second mounting component is arranged opposite to the first mounting component, and the second mounting component is used for mounting a second magnetic part to be tested; the second mounting component is slidable relative to the first mounting component in the force measuring direction of the force measuring component, so that the second magnetic part to be tested can slide relative to the first magnetic part to be tested, and the first magnetic part to be tested can shuttle through the central hole of the second magnetic part to be tested along the central axis of the second magnetic part to be tested. The second mounting component is connected to the force measuring end of the force measuring component, so that the second mounting component can transmit the magnetic force between the first magnetic part to be tested and the second magnetic part to be tested to the force measuring end of the force measuring component. The above-mentioned magnetic force testing tooling can be used to test the magnetic force between two magnetic parts that need to be nested for use.

Description

Technical Field

[0001] This application relates to the technical field of magnetic force testing equipment, and more specifically, to a magnetic force testing tooling fixture. Background Art

[0002] Since the fully magnetic levitation blood pump enables the impeller to levitate and rotate in the blood pump body through magnetic levitation technology, it has better blood compatibility, less damage to blood, and better durability compared to mechanical contact blood pumps, which has attracted a large number of researchers and commercial companies to invest in development.

[0003] During the operation of the fully magnetic levitation blood pump, the impeller is in a levitating and rotating state. To enable the impeller to levitate reliably, precise design of the magnetic force exerted on the impeller during operation is required. However, the current magnetic force testing equipment cannot achieve the magnetic force testing between the stiffness magnetic ring of the impeller and the central permanent magnet of the pump. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a magnetic force testing tooling fixture for testing the magnetic force between the stiffness magnetic ring of the impeller and the central permanent magnet of the pump.

[0005] To achieve the above purpose, according to one aspect of this application, a magnetic force testing tooling fixture is provided for testing the magnetic force between a first magnetic part to be measured and a second magnetic part to be measured. The second magnetic part to be measured is annular and has a central hole for the first magnetic part to be measured to pass through. The magnetic force testing tooling fixture includes: a base; a force measuring component, which is installed on the base and has a force measuring end and a force measuring direction, and the force measuring component can detect the force applied to the force measuring end along the force measuring direction; a first mounting component, which is installed on the base and is used for mounting the first magnetic part to be measured; a second mounting component, which is arranged opposite to the first mounting component and is used for mounting the second magnetic part to be measured; wherein, the second mounting component is slidable relative to the first mounting component in the force measuring direction of the force measuring component, so that the second magnetic part to be measured can slide relative to the first magnetic part to be measured, and the first magnetic part to be measured can shuttle through the central hole of the second magnetic part to be measured along the central axis of the second magnetic part to be measured. The second mounting component is connected to the force measuring end of the force measuring component, so that the second mounting component can transmit the magnetic force between the first magnetic part to be measured and the second magnetic part to be measured to the force measuring end of the force measuring component.

[0006] Optionally, the first mounting component includes: a position adjustment mechanism, which is installed on the base;

[0007] A rotating table capable of installing a first magnetic component to be measured, the rotating table is installed on a position adjustment mechanism, and the rotating table can drive the first magnetic component to be measured to rotate on a plane perpendicular to the force measurement direction of the force measurement component. Among them, the position adjustment mechanism can adjust the position of the rotating table in three-dimensional space.

[0008] Optionally, the first installation component further includes an installation table, the installation table is installed on the rotating table, and a boss capable of installing the first magnetic component to be measured is provided on the installation table, and the boss can pass through the central hole of the second magnetic component to be measured on the second installation component.

[0009] Optionally, the magnetic force testing tooling further includes a sliding table component, the sliding table component includes a fixed part and a sliding part slidably installed on the fixed part, and the fixed part is installed on the base; the second installation component is installed on the sliding part, and the force measurement end of the force measurement component is connected to the sliding part.

[0010] Optionally, the magnetic force testing tooling further includes a gripping component, the gripping component includes: a seat body, the seat body is installed on the sliding part; a gripping piece, the gripping piece is installed on the seat body, the gripping piece has a locking cavity, and the force measurement end of the force measurement component can be locked in the locking cavity.

[0011] Optionally, an installation cavity with adjustable cavity size is provided on the seat body, and a part of the gripping piece is clamped in the installation cavity; and / or, the gripping piece includes a rod part and a locking part connected to one end of the rod part, the rod part is connected to the seat body, and the locking cavity is located in the locking part; and / or, the height of the locking cavity relative to the sliding part is adjustable; and / or, the position of the seat body on the sliding part is adjustable along the force measurement direction of the force measurement component.

[0012] Optionally, the second installation component includes: an installation frame, the installation frame is fixed on the sliding part; an installation seat, the installation seat is installed on the installation frame, and the installation seat is used for detachably installing the second magnetic component to be measured.

[0013] Optionally, the second installation component further includes a locking piece, the locking piece includes a fixing part and at least two spaced limiting arms arranged on the fixing part, the fixing part is installed on the installation seat, and a limiting groove is formed between the two spaced limiting arms, and each limiting arm can be inserted into a circumferential flow channel of the second magnetic component to be measured.

[0014] Optionally, an arc wall is provided on one side of the fixing part close to the limiting arm, the bending radian of the arc wall is the same as the bending radian of the outer peripheral wall of the impeller, and the arc wall can be abutted against the outer peripheral wall of the impeller.

[0015] Optionally, an installation groove for accommodating the first magnetic component to be measured is provided on the first installation component, a positioning hole is provided on the second installation component, and the magnetic force testing tooling further includes a calibration piece, and the calibration piece can be partially received in the installation groove and partially received in the positioning hole to make the central axes of the first magnetic component to be measured and the second magnetic component to be measured coincide.

[0016] Optionally, the installation groove can make the central axis of the first magnetic part to be measured installed in the installation groove coincide with the central axis of the installation groove, and the second installation component can make the central axis of the first magnetic part to be measured installed on the second installation component coincide with the central axis of the positioning hole; when the calibration part is partially received in the installation groove and partially received in the positioning hole, the central axes of the installation groove and the positioning hole coincide.

[0017] Optionally, the calibration part includes a first disc portion and a second disc portion fixedly connected to the first disc portion. The second disc portion and the first disc portion are coaxial. The first disc portion has a first annular wall adapted to the groove wall of the installation groove, and the second disc portion has a second annular wall adapted to the hole wall of the positioning hole; and / or, the installation groove can receive the first magnetic part to be measured and a part of the calibration part at the same time, and the calibration part can be adsorbed and fixed by the first magnetic part to be measured.

[0018] Optionally, the first installation component includes an installation table, and a boss is provided on the installation table. The boss can pass through the central hole of the second magnetic part to be measured on the second installation component, and the installation groove is located at the end of the boss away from the installation table; the second installation component includes an installation seat, and a positioning groove for accommodating the second magnetic part to be measured is provided on the installation seat. The shape and size of the groove wall of the positioning groove are adapted to the outer peripheral wall of the second magnetic part to be measured, and the positioning hole is located on the bottom wall of the positioning groove. The central axis of the positioning hole can coincide with the central axis of the second magnetic part to be measured installed in the positioning groove. Among them, the installation seat and the installation table can be arranged opposite to each other along the force measuring direction of the force measuring component, and the installation seat can slide along the force measuring direction of the force measuring component.

[0019] Optionally, at least one of the second installation component and the second magnetic part to be measured installed on the second installation component can be in contact with the first installation component, and when at least one of the second installation component and the second magnetic part to be measured installed on the second installation component is in contact with the first installation component, at least a part of the first magnetic part to be measured installed on the first installation component passes through the second magnetic part to be measured.

[0020] Optionally, the force measuring component includes a position adjusting mechanism and a force measuring instrument. The position adjusting mechanism is installed on the base body, and the force measuring instrument is installed on the position adjusting mechanism. Among them, the force measuring end is located on the force measuring instrument, and the position adjusting mechanism can at least drive the force measuring instrument to slide along the force measuring direction, so that the force measuring instrument can drive the second installation component to slide along the force measuring direction.

[0021] The beneficial effects of the magnetic force testing tooling provided by this application are as follows: Compared with the prior art, the magnetic force testing tooling of this application is used to test the magnetic force interaction between a first magnetic part to be tested and a second magnetic part to be tested. The second magnetic part to be tested is annular and has a central hole for the first magnetic part to be tested to pass through. The magnetic force testing tooling has a first mounting component and a second mounting component. The first mounting component is used to mount the first magnetic part to be tested, and the second mounting component is used to mount the second magnetic part to be tested, thereby realizing the installation between the two magnets to be tested. The second mounting component is slidable relative to the first mounting component in the force measuring direction of the force measuring component, so that the second magnetic part to be tested can slide relative to the first magnetic part to be tested, and the first magnetic part to be tested can shuttle through the central hole of the second magnetic part along the central axis of the second magnetic part. The second mounting component is connected to the force measuring end of the force measuring component, so that the second mounting component can transmit the magnetic force interaction between the first magnetic part to be tested and the second magnetic part to be tested to the force measuring end of the force measuring component. This enables the above-mentioned magnetic force testing tooling to be used to test the magnetic force interaction between two magnetic parts that need to be nested for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of a nested component formed by a first magnetic part to be tested and a second magnetic part to be tested in one implementation manner;

[0024] Figures 2 - 4 Respectively Figure 1 Cross-sectional views of the nested component shown in three states;

[0025] Figure 5 Structural schematic diagram of the magnetic force testing tooling according to the first implementation manner of this application, where the first magnetic part to be tested and the second magnetic part to be tested are installed on the magnetic force testing tooling;

[0026] Figure 6 For Figure 5 Structural schematic diagram of the force measuring component, gripping component and sliding table component of the magnetic force testing tooling shown;

[0027] Figure 7 For Figure 5 Structural schematic diagram of the force measuring component of the magnetic force testing tooling shown;

[0028] Figure 8 For Figure 5Schematic structural diagram of the first mounting assembly of the magnetic force testing tooling shown, wherein a first magnetic component to be tested is mounted on the first mounting assembly;

[0029] Figure 9 For Figure 8 Exploded view of the first mounting assembly shown;

[0030] Figure 10 For Figure 5 Schematic structural diagram of the second mounting assembly of the magnetic force testing tooling shown, wherein a second magnetic component to be tested is mounted on the second mounting assembly;

[0031] Figure 11 For Figure 10 Exploded view of the second mounting assembly shown;

[0032] Figure 12 For Figure 5 Assembly drawing of the moving seat and the gripping component of the magnetic force testing tooling shown;

[0033] Figure 13 For Figure 12 Exploded view of the assembly drawing shown;

[0034] Figure 14 For Figure 5 Schematic diagram during the process of the first mounting assembly and the second mounting assembly of the magnetic force testing tooling approaching each other, wherein a first magnetic component to be tested and a calibration component are mounted on the first mounting assembly, and a second magnetic component to be tested is mounted on the second mounting assembly;

[0035] Figure 15 For Figure 14 Schematic structural diagram of the calibration component shown;

[0036] Figure 16 Schematic structural diagram on the mounting seat of the second mounting assembly of the magnetic force testing tooling in the second embodiment;

[0037] Figure 17 For Figure 16 Exploded view of;

[0038] Figure 18 For Figure 16 Schematic structural diagram of the locking component of the second mounting assembly shown. Specific Embodiments

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0041] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to this application.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0043] The magnetic force testing tooling of this application can be used to test the magnetic force action between two magnetic parts that need to be nested. For example, it is used to test the magnetic force action between the central permanent magnet in the central column of a blood pump and the stiffness magnetic ring on the impeller.

[0044] As Figure 1 shown, in one of the embodiments, the two magnetic parts that need to be nested are respectively the first magnetic part to be tested 1 and the second magnetic part to be tested 2. The second magnetic part to be tested 2 is annular, and the second magnetic part to be tested 2 has a central hole 2a through which the first magnetic part to be tested 1 can pass, so that the first magnetic part to be tested 1 can shuttle through the central hole 2a along the central axis of the second magnetic part to be tested 2.

[0045] Among them, both the first magnetic part to be tested 1 and the second magnetic part to be tested 2 have an N pole end and an S pole end. The N pole end and the S pole end of the second magnetic part to be tested 2 are arranged along the axial direction of the second magnetic part to be tested 2. That is, the magnetization direction of the second magnetic part to be tested 2 is axial magnetization. When the first magnetic part to be tested 1 and the second magnetic part to be tested 2 are nested, there is a gap between the first magnetic part to be tested 1 and the second magnetic part to be tested 2, and the magnetization direction of the first magnetic part to be tested 1 is the same as the magnetization direction of the second magnetic part to be tested 2.

[0046] When the first magnetic component to be measured 1 and the second magnetic component to be measured 2 are nested and used, the magnetization directions are the same. When the first magnetic component to be measured 1 and the second magnetic component to be measured 2 are axially misaligned, there is a repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2. The magnetic force testing tooling of the present application is mainly used to test the axial component of the repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2, that is, the axial repulsive force. Specifically, for the axial repulsive force situation of the magnetic force acting corresponding to the relative positions of the first magnetic component to be measured 1 and the second magnetic component to be measured 2, please refer to Figures 2 - 4 .

[0047] Specifically, the first magnetic component to be measured 1 is annular or columnar. The N pole end and the S pole end of the first magnetic component to be measured 1 are arranged along the axis of the first magnetic component to be measured 1, that is, the magnetization direction of the first magnetic component to be measured 1 is axial magnetization. When the first magnetic component to be measured 1 is annular, the outer diameter of the first magnetic component to be measured 1 is smaller than the inner diameter of the second magnetic component to be measured 2; when the first magnetic component to be measured 1 is columnar, the diameter of the first magnetic component to be measured 1 is smaller than the inner diameter of the second magnetic component to be measured 2. Taking a blood pump as an example, the first magnetic component to be measured 1 is a central permanent magnet, and the second magnetic component to be measured 2 is a stiffness magnetic ring on the impeller of the blood pump, or the second magnetic component to be measured 2 can also be an impeller with a stiffness magnetic ring.

[0048] Refer to Figure 5 , the magnetic force testing tooling 100 of the first embodiment can be used to test the magnetic force between the above-mentioned first magnetic component to be measured 1 and the second magnetic component to be measured 2. In this embodiment, taking the first magnetic component to be measured 1 as a central permanent magnet and the second magnetic component to be measured 2 as an impeller with a stiffness magnetic ring as an example, the stiffness magnetic ring and the impeller are coaxially arranged. The magnetic force testing tooling 100 includes a base 10, a force measuring component 20, a first mounting component 30 and a second mounting component 40. Among them, the force measuring component 20 is mounted on the base 10. The force measuring component 20 has a force measuring end and a force measuring direction. The force measuring component 20 can detect the force applied to the force measuring end along the force measuring direction; the first mounting component 30 is mounted on the base 10 and is used to mount the first magnetic component to be measured 1; the second mounting component 40 is arranged opposite to the first mounting component 30, and the second mounting component 40 is used to mount the second magnetic component to be measured 2; the second mounting component 40 is slidable relative to the first mounting component 30 in the force measuring direction of the force measuring component 20, so that the second magnetic component to be measured 2 can slide relative to the first magnetic component to be measured 1, and the first magnetic component to be measured 1 can shuttle through the central hole 2a of the second magnetic component to be measured 2 along the central axis of the second magnetic component to be measured 2. The second mounting component 40 is connected to the force measuring end of the force measuring component 20, so that the second mounting component 40 can transmit the magnetic force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2 to the force measuring end of the force measuring component 20. Specifically, the force measuring direction of the force measuring component 20 is consistent with the extending direction of the central axis of the second magnetic component to be measured 2.

[0049] Since the first mounting component 30 is fixedly arranged on the base body 10, and the second mounting component 40 is slidably arranged on the base body 10 along the force measuring direction of the force measuring component 20, the axial repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2 can cause the second mounting component 40 to have a sliding tendency, so that the second mounting component 40 can transmit the axial repulsive force to the force measuring end of the force measuring component 20.

[0050] Since the magnetic force testing tooling 100 of the present application has the first mounting component 30 and the second mounting component 40, the first mounting component 30 is used to mount the first magnetic component to be measured 1, and the second mounting component 40 is used to mount the second magnetic component to be measured 2, so as to realize the mounting between two magnets to be measured. Among them, in the force measuring direction of the force measuring component 20, the second mounting component 40 is slidable relative to the first mounting component 30 in the force measuring direction of the force measuring component 20, and the second mounting component 40 is connected to the force measuring end of the force measuring component 20, so that the second mounting component 40 can transmit the magnetic force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2 to the force measuring end of the force measuring component 20, enabling the force measuring component 20 to directly measure the magnetic repulsive force received by the second magnetic component to be measured 2 axially, so that the above-mentioned magnetic force testing tooling 100 can test the axial repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2.

[0051] In order to realize the sliding of the second mounting component 40 on the base body 10, the magnetic force testing tooling 100 in this embodiment further includes a slide table component 50. The slide table component 50 includes a fixed part and a sliding part that can be slidably mounted on the fixed part. The fixed part is mounted on the base body 10; the second mounting component 40 is mounted on the sliding part, and the force measuring end of the force measuring component 20 is connected to the sliding part. By providing the slide table component 50, it is convenient for the second mounting component 40 to transmit the axial repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2 to the force measuring end of the force measuring component 20 when sliding relative to the first mounting component 30.

[0052] Please refer to Figure 6 , specifically, the slide table component 50 includes a fixing member 51, a guide rail 52, an air bearing 53, and a moving seat 54. The fixing member 51 is fixed on the base body 10; the guide rail 52 is fixedly connected to the fixing member 51, and the extending direction of the guide rail 52 is consistent with the force measuring direction of the force measuring component 20; the air bearing 53 is slidably sleeved on the guide rail 52, the moving seat 54 is fixedly connected to the air bearing 53, and the moving seat 54 is connected to the force measuring end of the force measuring component 20, so that the moving seat 54 can move in the force measuring direction of the force measuring component 20. Among them, the second mounting component 40 is mounted on the moving seat 54. Among them, the fixing member 51 and the guide rail 52 are the fixed parts of the slide table component 50, and the air bearing 53 and the moving seat 54 are the sliding parts. Specifically, the second mounting component 40 and the moving seat 54 are detachably connected.

[0053] The air bearing 53 has the advantages of low friction and high precision, which is beneficial to reducing friction loss and improving the accuracy of the test.

[0054] In the illustrated embodiment, there are two guide rails 52 and four fixing members 51. Each guide rail 52 corresponds to two fixing members 51, and both ends of each guide rail 52 are fixedly connected to two fixing members 51 respectively. In other embodiments, the number of guide rails 52 can also be multiple, such as three, four, or five, which can be adjusted according to the weights of the moving seat 54, the second mounting assembly 40, and the second magnetic member to be tested 2.

[0055] In the above embodiment, every two fixing members 51 form a group corresponding to one guide rail 52. In other embodiments, every three fixing members 51 can also form a group. Both ends of each guide rail 52 are fixedly connected to two fixing members 51 respectively, and the middle part of each guide rail 52 is fixedly connected to one fixing member 51 to prevent the guide rail 52 from bending, ensure the movement accuracy of the moving seat 54, and improve the measurement accuracy.

[0056] The base 10 is generally in a plate-like structure, and the base 10 has two parallel and opposite surfaces. Among them, the force measuring assembly 20, the first mounting assembly 30, and the second mounting assembly 40 are all mounted on the same surface of the base 10.

[0057] Please refer to Figure 7 , the force measuring assembly 20 includes a position adjusting mechanism 21 and a force gauge 22. The position adjusting mechanism 21 is mounted on the base 10, and the force gauge 22 is mounted on the position adjusting mechanism 21. Among them, the force measuring end is located on the force gauge 22, and the position adjusting structure 21 can at least drive the force gauge 22 to slide along the force measuring direction, so that the force gauge 22 can drive the second mounting assembly 40 to slide along the force measuring direction.

[0058] Specifically, the position adjusting mechanism 21 is a two-dimensional sliding table. The position adjusting mechanism 21 has two micrometers. One of the micrometers can drive the force gauge 22 to slide in the force measuring direction, and through this micrometer, the moving seat 54 can be driven to move to pull the second mounting assembly 40 to slide away from the first mounting assembly 30. Specifically, the other micrometer of the position adjusting mechanism 21 can drive the force gauge 22 to slide in a direction perpendicular to the force measuring direction and parallel to the base 10.

[0059] Specifically, the dynamometer 22 includes a digital display device 222 and a probe pin 224. The probe pin 224 is electrically connected to the digital display device 222. Among them, the force-measuring end is located on the probe pin 224. The second mounting assembly 40 can transmit the magnetic force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2 to the probe pin 224. The probe pin 224 can measure the value of the force in the force-measuring direction received by the second mounting assembly 40 and can transmit this value to the digital display device 222, so that the value of the force measured by the dynamometer 22 can be intuitively displayed through the digital display device 222, facilitating the staff to obtain test data. Specifically, the probe pin 224 has a pressure sensor capable of detecting the value of the force.

[0060] See Figure 8 , the first mounting assembly 30 includes a position adjustment mechanism 31, a rotating table 32, and a mounting table 33. The position adjustment mechanism 31 is mounted on the base body 10; the rotating table 32 is mounted on the position adjustment mechanism 31, and the mounting table 33 is used to mount the first magnetic component to be measured 1, and the mounting table 33 is mounted on the rotating table 32. Among them, the position adjustment mechanism 31 can adjust the position of the rotating table 32 in three-dimensional space, and the rotating table 32 can drive the mounting table 33 and the first magnetic component to be measured 1 to rotate in a plane perpendicular to the force-measuring direction of the force-measuring assembly 20. Specifically, the rotating table 32 can drive the mounting table 33 and the first magnetic component to be measured 1 to rotate around the central axis of the first magnetic component to be measured 1.

[0061] By providing the position adjustment mechanism 31 that can adjust the position of the rotating table 32 and / or the mounting table 33 in three-dimensional space, it is convenient to adjust the position of the first magnetic component to be measured 1 in three-dimensional space. By providing the rotating table 32 to drive the first magnetic component to be measured 1 to rotate in a plane perpendicular to the central axis of the first magnetic component to be measured 1, it is convenient to find the maximum value of the axial repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2, so as to measure the maximum axial repulsive force between the first magnetic component to be measured 1 and the second magnetic component to be measured 2, providing more accurate reference data for selecting suitable first and second magnetic components to be measured 1 and 2 for the subsequent pump body. Specifically, by rotating the first magnetic component to be measured 1 clockwise and counterclockwise by a certain angle, the periodic change of the maximum axial repulsive force is found, and then the first magnetic component to be measured 1 is positioned at the place where the axial attractive force is the largest and then tested.

[0062] Please refer to Figure 9, in the illustrated embodiment, the position adjustment mechanism 31 includes a two-dimensional slide table 311, a mounting bracket 312, and a one-dimensional slide table 313. The two-dimensional slide table 311 is mounted on the base body 10, and the mounting bracket 312 is fixedly connected to the two-dimensional slide table 311. The two-dimensional slide table 311 can drive the mounting bracket 312 to slide in the first axis and the second axis direction perpendicular to the first axis. Among them, the extending direction of the first axis is consistent with the force measuring direction; the one-dimensional slide table 313 is fixedly connected to the mounting bracket 312, and the rotating table 32 is mounted on the one-dimensional slide table 313. The one-dimensional slide table 313 can drive the impeller to slide in the third axis direction perpendicular to the first axis and the second axis. Specifically, the second axis is parallel to the base body 10, and the third axis is perpendicular to the base body 10.

[0063] It should be noted that the position adjustment mechanism 31 is not limited to the above structure. For example, in another embodiment, the position adjustment mechanism 31 includes a three-dimensional slide table and a mounting bracket. The three-dimensional slide table is mounted on the base body 10, and the mounting bracket is fixedly connected to the three-dimensional slide table. The three-dimensional slide table can drive the mounting bracket to move in three-dimensional space, and the rotating table 32 is mounted on the mounting bracket. Specifically, the three-dimensional slide table has three differential heads, that is, the movement of the rotating table 32 in a three-dimensional space is divided into movements in three mutually perpendicular directions. The three differential heads respectively adjust the movement in one direction. By adjusting the differential heads in the corresponding directions, the rotating table 32 can be moved to any position in a three-dimensional space. One of the three differential heads can drive the rotating table 32 to move in the force measuring direction. Or, in another embodiment, the position adjustment mechanism 31 is a three-dimensional slide table. At this time, the rotating table 32 is mounted on the three-dimensional slide table, and the three-dimensional slide table can drive the mounting bracket to move within the rotating table 32.

[0064] The rotating table 32 can be set to be able to rotate as a whole relative to the position adjustment mechanism 31. At this time, the rotating table 32 is rotationally connected to the position adjustment mechanism 31; it can also be set that a part of the rotating table 32 can rotate. At this time, the rotating table 32 has a fixed part 321 fixedly connected to the position adjustment mechanism 31 and a rotating part 322 rotationally connected to the fixed part 321, and the mounting table 33 is fixedly connected to the rotating part 322.

[0065] In some embodiments, there are readings on the rotating table 32 so that the operator can know the angle rotated by the first magnetic part to be measured 1 through the readings. In one of the embodiments, the rotating table 32 is a relatively precise manual rotating table. In other embodiments, in order to improve the test accuracy, the rotating table 32 can also be an electric rotating table.

[0066] Specifically, the mounting table 33 can be fixedly connected to the rotating table 32 by means of screws, clamping, etc.

[0067] Specifically, the mounting table 33 is provided with a boss 332 capable of mounting the first magnetic component to be measured 1, and the boss 332 can pass through the central hole 2a of the second magnetic component to be measured 2 on the second mounting assembly 40. Specifically, the boss 332 is generally a columnar structure, and the diameter of the boss 332 is smaller than the aperture of the central hole 2a of the second magnetic component to be measured 2, so that there is a gap between the boss 332 and the second magnetic component to be measured 2 when the boss 332 passes through the second magnetic component to be measured 2.

[0068] Specifically, an installation groove 334 for accommodating the first magnetic component to be measured 1 is formed on the boss 332. The installation groove 334 can make the central axis of the first magnetic component to be measured 1 installed in the installation groove 334 coincide with the central axis of the installation groove 334. Among them, the groove wall of the installation groove 334 is adapted to the outer peripheral wall of the first magnetic component to be measured 1, so that the central axis of the first magnetic component to be measured 1 installed in the installation groove 334 can coincide with the central axis of the installation groove 334. That is, the installation groove 334 is not only used to accommodate the first magnetic component to be measured 1, but also can position the first magnetic component to be measured 1. In the illustrated embodiment, the installation groove 334 is located at the end of the boss 332 away from the mounting table 33.

[0069] It should be noted that the mounting table 33 can also be omitted. The first magnetic component to be measured 1 can be directly fixed on the rotating table 32, or both the rotating table 32 and the mounting table 33 are omitted. At this time, the first magnetic component to be measured 1 can be directly fixed on the position adjustment mechanism 31; or only the rotating table 32 is omitted, and the mounting table 33 is fixed on the position adjustment mechanism 31.

[0070] Please refer to Figure 10 and Figure 11 , the second mounting assembly 40 includes a mounting frame 41 and a mounting seat 42. The mounting frame 41 is fixed on the sliding member. Specifically, the mounting frame 41 is fixed to the moving seat 54; the mounting seat 42 is mounted on the mounting frame 41, and the mounting seat 42 is used for detachably mounting the second magnetic component to be measured 2. The mounting seat 42 and the mounting table 33 are arranged opposite to each other along the force measuring direction of the force measuring assembly 20.

[0071] In some embodiments, the mounting seat 42 is fixed to the mounting frame 41 by screws. The second magnetic component to be measured 2 is fixed to the mounting seat 42 by screws. If the second magnetic component to be measured 2 is a stiffness magnetic ring, the second mounting assembly 40 further includes a test impeller. At this time, the second magnetic component to be measured 2 is installed in the test impeller, and the test impeller is fixed to the mounting seat by screws.

[0072] Please refer to Figure 5 , Figure 6 , Figure 12 and Figure 13, in order to better achieve the force transmission between the force measuring end of the force measuring component 20 and the sliding table component 50, the magnetic force test tooling 100 in this embodiment further includes a gripping component 60. The gripping component 60 includes a seat body 61 and a gripping member 62. The seat body 61 is installed on the sliding member, and the gripping member 62 is installed on the seat body 61. The gripping member 62 has a locking cavity 62a, and the force measuring end of the force measuring component 20 can be locked in the locking cavity 62a. Specifically, the seat body 61 is installed on the moving seat 54; the probe pin 224 can be locked in the locking cavity 62a. The gripping component 60 further includes a first fastener (not shown in the figure), and the first fastener can pass through the gripping member 62 to adjust the size of the locking cavity 62a, so as to lock and release the probe pin 224 of the force measuring component 20 by adjusting the locking cavity 62a through the first fastener.

[0073] In the illustrated embodiment, the height of the locking cavity 62a relative to the moving seat 54 is adjustable. Specifically, the position of the locking cavity 62a is adjustable in the direction perpendicular to the base body 10.

[0074] In the illustrated embodiment, the seat body 61 is provided with an installation cavity 61a with an adjustable cavity size, and a part of the gripping member 62 is clamped in the installation cavity 61a. In this way, not only can the gripping member 62 be conveniently installed on the seat body 61, but also the position of the gripping member 62 clamped by the installation cavity 61a can be adjusted to adjust the height of the locking cavity 62a relative to the moving seat 54. In this embodiment, the gripping component 60 further includes a second fastener 64, and the second fastener 64 passes through the seat body 61. The second fastener 64 can adjust the size of the installation cavity 61a, wherein the gripping member 62 is clamped in the installation cavity 61a. By adjusting the size of the installation cavity 61a through the second fastener 64, the clamping and loosening of the installation cavity 61a on the gripping member 62 are realized.

[0075] In the illustrated embodiment, the gripping member 62 includes a rod portion 621 and a locking portion 622 fixedly connected to one end of the rod portion 621. The rod portion 621 is connected to the seat body 61, and the locking cavity 62a is located on the locking portion 622. Specifically, the rod portion 621 of the gripping member 62 can be clamped in the installation cavity 61a, and by adjusting the length of the rod portion 621 received in the installation cavity 61a, the height of the locking cavity 62a relative to the moving seat 54 can be adjusted.

[0076] In the illustrated embodiment, the position of the seat body 61 on the sliding member is adjustable along the force measuring direction of the force measuring assembly 20. Specifically, the seat body 61 is adjustably mounted on the moving seat 54 of the sliding table assembly 50. More specifically, a guiding groove 57 extending along the force measuring direction of the force measuring assembly 20 is provided on the moving seat 54, a connecting hole 61b is further formed on the seat body 61, and the gripping assembly 60 further includes a third fastener 65 and a nut 66. The third fastener 65 is sequentially passed through the connecting hole 61b and the guiding groove 57, and the third fastener 65 can slide along the guiding groove 57 to drive the seat body 61 to move, so that the seat body 61 can be adjusted to a desired position. The nut 66 can lock the third fastener 65 to prevent the third fastener 65 from sliding along the guiding groove 57, so that the seat body 61 is stabilized at the desired position.

[0077] Please refer to again Figure 5 and Figure 6 , in some embodiments, a spirit level 70 is further provided on the moving seat 54, and the spirit level 70 can detect whether the moving seat 54 is horizontal. In some embodiments, a grating scale 75 is further provided on the moving seat 54, and the grating scale 75 can measure the displacement of the moving seat 54.

[0078] The operation of using the above magnetic force testing tooling 100 to test the magnetic force (specifically, axial repulsive force) between the first magnetic part to be tested 1 and the second magnetic part to be tested 2 is as follows:

[0079] Before testing: Install the first magnetic part to be tested 1 in the installation groove 334 of the first installation assembly 30, install the second magnetic part to be tested 2 in the second installation assembly 40, and adjust the relative positions of the first installation assembly 30 and the second installation assembly 40 so that the central axis of the first magnetic part to be tested 1 on the first installation assembly 30 coincides with the central axis of the second magnetic part to be tested 2 on the second installation assembly 40, and the distance between the first magnetic part to be tested 1 on the first installation assembly 30 and the second magnetic part to be tested 2 on the second installation assembly 40 is at a predetermined distance.

[0080] Testing: Rotate the micrometer head of the position adjusting mechanism 21 of the force measuring assembly 20 that can drive the force measuring instrument 22 to slide in the force measuring direction, so that the force measuring assembly 20 pulls the second installation assembly 40 to slide away from the first installation assembly 30 through the gripping assembly 60 and the sliding table assembly 50, so as to adjust the distance between the first magnetic part to be tested 1 on the first installation assembly 30 and the second magnetic part to be tested 2 on the second installation assembly 40. During the process that the force measuring assembly 20 pulls the second installation assembly 40 away from the first installation assembly 30, measure the value of the force through the probe pin 224 of the force measuring assembly 20, and measure the displacement of the second installation assembly 40 moved by the grating scale 75, so as to test the axial repulsive force between the first magnetic part to be tested 1 and the second magnetic part to be tested 2 at different distances.

[0081] For more convenient testing and to be able to test the axial repulsive force between the stiffness magnetic ring and the central permanent magnet of the impeller of the blood pump in various states as much as possible, the second mounting assembly 40 enables the first magnetic member to be tested 1 on the first mounting assembly 30 to penetrate into the second magnetic member to be tested 2 on the second mounting assembly 40 from the side facing the first mounting assembly 30 of the second magnetic member to be tested 2, and enables the first magnetic member to be tested 1 to at least partially penetrate out from the side of the second magnetic member to be tested 2 facing away from the first magnetic member to be tested 1. In this way, most of the magnetic force values of the first magnetic member to be tested 1 and the second magnetic member to be tested 2 that need to be nested and used in actual applications can be tested. For this purpose, at least one of the second mounting assembly 40 and the second magnetic member to be tested 2 mounted on the second mounting assembly 40 can abut against the first mounting assembly 30, and when at least one of the second mounting assembly 40 and the second magnetic member to be tested 2 mounted on the second mounting assembly 40 abuts against the first mounting assembly 30, at least a part of the first magnetic member to be tested 1 mounted on the first mounting assembly 30 penetrates through the second magnetic member to be tested 2.

[0082] In the illustrated embodiment, the second magnetic member to be tested 2 mounted on the second mounting assembly 40 can abut against the mounting table 33 of the first mounting assembly 30. When the second magnetic member to be tested 2 mounted on the second mounting assembly 40 abuts against the mounting table 33 of the first mounting assembly 30, the convex platform 332 penetrates through the second magnetic member to be tested 2, and a part of the first magnetic member to be tested 1 extends out from the side of the second magnetic member to be tested 2 away from the mounting table 33.

[0083] It can be understood that in other embodiments, it can also be that the second mounting assembly 40 can abut against the first mounting assembly 30, and when the second mounting assembly 40 abuts against the first mounting assembly 30, at least a part of the first magnetic member to be tested 1 mounted on the first mounting assembly 30 penetrates through the second magnetic member to be tested 2. For example, the mounting base 42 of the second mounting assembly 40 abuts against the mounting table 33 of the first mounting assembly 30. When the mounting base 42 abuts against the mounting table 33, the convex platform 332 penetrates through the second magnetic member to be tested 2, and a part of the first magnetic member to be tested 1 extends out from the side of the second magnetic member to be tested 2 away from the mounting table 33.

[0084] Specifically refer to Figures 2 - 4 , assuming that when the second magnetic member to be tested 2 is mounted on the second mounting assembly 40, the S pole end of the second magnetic member to be tested 2 faces the mounting base 42 of the second mounting assembly 40, the N pole end faces the first mounting assembly 30, and the magnetization direction of the first magnetic member to be tested 1 mounted on the first mounting assembly 30 is the same as that of the second magnetic member to be tested 2 mounted on the second mounting assembly 40. Then:

[0085] When the S pole end of the first magnetic part 1 to be measured passes through the second magnetic part 2 to be measured and the N pole end is located in the central hole 2a of the second magnetic part 2 to be measured, the direction of the axial repulsive force between the first magnetic part 1 to be measured and the second magnetic part 2 to be measured is as shown in Figure 2 shown; when the first magnetic part 1 to be measured is located inside the second magnetic part 2 to be measured, the axial repulsive force between the first magnetic part 1 to be measured and the second magnetic part 2 to be measured is 0, as shown in Figure 3 shown; when the S pole end of the first magnetic part 1 to be measured is located inside the second magnetic part 2 to be measured and the N pole end is located outside the central hole 2a of the second magnetic part 2 to be measured, the direction of the axial repulsive force between the first magnetic part 1 to be measured and the second magnetic part 2 to be measured is as shown in Figure 4 shown, Figure 4 The direction of the axial repulsive force shown in is opposite to the direction of the axial repulsive force shown in Figure 2 shown.

[0086] In the case shown in Figure 2 the axial repulsive force makes the second mounting assembly 40 tend to move closer to the direction where the first mounting assembly 30 is located. At this time, when the second mounting assembly 40 is pulled away from the first mounting assembly 30 by the force measuring assembly 20, the force of the gripping member 62 on the probe pin 224 is a pulling force; in the case shown in Figure 4 the axial repulsive force makes the second mounting assembly 40 tend to move away from the direction where the first mounting assembly 30 is located. At this time, the force of the gripping member 62 on the probe pin 224 is a thrust force.

[0087] Specifically, the length of the part of the first magnetic part 1 to be measured that passes through the side of the second magnetic part 2 away from the first mounting assembly 30 can be determined according to the actual application of the first magnetic part 1 to be measured and the second magnetic part 2.

[0088] Please also refer to Figures 8 - 11 and Figure 14 To improve the concentricity during the test of the first magnetic part 1 to be measured and the second magnetic part 2 to be measured and thus improve the test accuracy, the magnetic force test tooling 100 further includes a calibration member 80. The calibration member 80 can make the central axes of the first magnetic part 1 to be measured and the second magnetic part 2 to be measured coincide. Then, before the test, the calibration member 80 can be used to calibrate the concentricity of the first magnetic part 1 to be measured on the first mounting assembly 30 and the second magnetic part 2 to be measured on the second mounting assembly 40, and then the test can be carried out.

[0089] Specifically, the second mounting assembly 40 is provided with a positioning hole 43. The calibration member 80 can be partially received in the mounting groove 334 and partially received in the positioning hole 43 to make the central axes of the first magnetic part 1 to be measured and the second magnetic part 2 to be measured coincide.

[0090] The second mounting component 40 can make the central axis of the second magnetic component 2 to be measured mounted on the second mounting component 40 coincide with the central axis of the positioning hole 43. When the calibration component 80 is partially received in the mounting groove 334 and partially received in the positioning hole 43, the central axis of the mounting groove 334 coincides with the central axis of the positioning hole 43. And since the mounting groove 334 can make the central axis of the first magnetic component 1 to be measured mounted in the mounting groove 334 coincide with the central axis of the mounting groove 334, the central axis of the first magnetic component 1 to be measured mounted in the mounting groove 334 can coincide with the central axis of the second magnetic component 2 to be measured mounted on the second mounting component 40.

[0091] More specifically, the positioning hole 43 is located on the mounting base 42. In the illustrated embodiment, a positioning groove 42a for receiving the second magnetic component 2 to be measured is formed on the mounting base 42. The shape and size of the groove wall of the positioning groove 42a are adapted to the outer peripheral wall of the second magnetic component 2 to be measured. The positioning hole 43 is located on the bottom wall of the positioning groove 42a, and the central axis of the positioning hole 43 can coincide with the central axis of the second magnetic component 2 to be measured mounted in the positioning groove 42a. In the illustrated embodiment, the central axis of the positioning hole 43 coincides with the central axis of the positioning groove 42a, so that when the second magnetic component 2 to be measured is received in the positioning groove 42a, the central axis of the second magnetic component 2 to be measured coincides with the central axis of the positioning hole 43.

[0092] Wherein, the mounting groove 334 can simultaneously receive the first magnetic component 1 to be measured and a part of the calibration component 80, and the calibration component 80 can be adsorbed and fixed by the first magnetic component 1 to be measured received in the mounting groove 334.

[0093] Please refer to Figure 15 , in the illustrated embodiment, the calibration component 80 includes a first disc portion 81 and a second disc portion 82 fixedly connected to the first disc portion 81. The second disc portion 82 and the first disc portion 81 are coaxial. Wherein, the first disc portion 81 has a first annular wall 81a adapted to the groove wall of the mounting groove 334, and the second disc portion 82 has a second annular wall 82a adapted to the hole wall of the positioning hole 43. Specifically, the mounting groove 334 can simultaneously receive the first magnetic component 1 to be measured and at least a part of the first disc portion 81, and the first disc portion 81 can be adsorbed and fixed by the first magnetic component 1 to be measured received in the mounting groove 334.

[0094] Please refer to again Figure 5, in order to facilitate maintaining the distance between the second magnetic component 2 to be tested on the second mounting component 40 and the second magnetic component 2 on the first mounting component 30 before testing, the magnetic force testing tooling 100 in this embodiment further includes a telescopic positioning component 85. The positioning component 85 is installed on the base body 10. When the positioning component 85 extends, it can abut against the air bearing 53 to prevent the moving seat 54 from sliding away from the first mounting component 30. In some embodiments, the positioning component 85 is a cylinder. At this time, before testing, the positioning component 85 is in an extended state and abuts against the air bearing 53 to maintain the relative position between the second mounting component 40 and the first mounting component 30. During testing, the positioning component 85 is shortened to enable the positioning component 85 to avoid the air bearing 53.

[0095] Furthermore, in order to facilitate measuring the force between the first magnetic component 1 to be tested and the second magnetic component 2 to be tested at different distances, the position of the positioning component 85 is adjustable in the force measurement direction. Specifically, a strip-shaped hole (not shown in the figure) along the force measurement direction is formed on the base body 10. The positioning component 85 is partially received in the strip-shaped hole, and the positioning component 85 can move along the strip-shaped hole to adjust the distance between the first magnetic component 1 to be tested and the second magnetic component 2 to be tested, so that the axial repulsive force between the first magnetic component 1 to be tested and the second magnetic component 2 to be tested at different distances can be measured.

[0096] In some embodiments, the positioning component 85 can also be omitted, and the operator can directly maintain the relative position between the second mounting component 40 and the first mounting component 30 through a fixture or the operator's hand or other tools.

[0097] In summary, the magnetic force testing tooling 100 of this embodiment has at least the following beneficial technical effects:

[0098] (1) Since the magnetic force testing tooling 100 of the present application has a first mounting component 30 and a second mounting component 40, the first mounting component 30 is used to mount the first magnetic component 1 to be tested, and the second mounting component 40 is used to mount the second magnetic component 2 to be tested, thereby realizing the installation between the two magnets to be tested. Among them, in the force measurement direction of the force measurement component 20, the second mounting component 40 is slidable relative to the first mounting component 30 in the force measurement direction of the force measurement component 20. The second mounting component 40 is connected to the force measurement end of the force measurement component 20, so that the magnetic force between the first magnetic component 1 to be tested and the second magnetic component 2 to be tested can be transmitted to the force measurement end of the force measurement component 20, enabling the force measurement component 20 to directly test the magnetic repulsive force received by the second magnetic component 2 in the axial direction, so that the above-mentioned magnetic force testing tooling 100 can test the axial repulsive force between the first magnetic component 1 to be tested and the second magnetic component 2 to be tested.

[0099] (2) The magnetic force is transmitted by the slide assembly 50 with an air bearing 53, which helps reduce frictional losses and improve the accuracy of the test.

[0100] (3) By means of the calibration component 80, the concentricity of the first magnetic component to be measured 1 and the second magnetic component to be measured 2 can be improved, and the accuracy of the test can be enhanced.

[0101] The structure of the magnetic force test tooling in the second embodiment is similar to that of the magnetic force test tooling 100 in the first embodiment. The difference is that the second mounting assembly of the magnetic force test tooling in this embodiment is slightly different, and the second magnetic component to be measured 2 in this embodiment still takes the impeller with a rigid magnetic ring as an example.

[0102] Please refer to Figures 16 - 18 In this embodiment, the second mounting assembly includes a mounting frame, a mounting seat 92 and a locking member 93.

[0103] The structure of the mounting frame can be the same as that of the mounting frame 41 in the first embodiment, which will not be elaborated here.

[0104] The mounting seat 92 does not have the positioning groove 42a on the mounting seat 42 in the first embodiment. The mounting seat 92 has a first mounting surface 92a and a second mounting surface 92b facing away from each other. The first mounting surface 92a faces the mounting frame, and the second magnetic component to be measured 2 is mounted on the second mounting surface 92b. The mounting seat 92 is fixedly connected to the mounting frame by screws. The mounting seat 92 is also provided with a positioning hole 921 for the calibration component to calibrate the concentricity of the second magnetic component to be measured 2 and the first magnetic component to be measured 1. The central axis of the positioning hole 921 coincides with the central axis of the second magnetic component to be measured 2 mounted on the mounting seat 92. To facilitate the shuttle of the boss of the mounting table of the first mounting assembly in the central hole 2a of the second magnetic component to be measured 2, the diameter of the positioning hole 921 is larger than the diameter of the boss of the mounting table of the first mounting assembly.

[0105] In the middle of the second mounting surface 92b of the mounting seat 92, there is also a positioning table 922 for the second magnetic component to be measured 2 to be sleeved. The positioning table 922 can at least partially accommodate in the central hole 2a of the second magnetic component to be measured 2 to position the second magnetic component to be measured 2. The positioning hole 921 extends from the end surface of the positioning table 922 far from the mounting seat 92 to the first mounting surface 92a of the mounting seat 92. The positioning table 922 is provided to facilitate the positioning of the second magnetic component to be measured 2.

[0106] The locking member 93 includes a fixing portion 931 and at least two spaced limiting portions 932 provided on the fixing portion 931. The fixing portion 931 is mounted on the mounting seat 92. A limiting groove 933 is formed between the two spaced limiting portions 932. Each limiting portion 932 can be inserted into a circumferential flow channel 2b of the second magnetic member to be tested 2. Positioning is achieved through the cooperation of the limiting groove 933 and the blade of the second magnetic member to be tested 2, preventing the second magnetic member to be tested 2 from shifting. The limiting portion 932 of the locking member 93 extends into the circumferential flow channel 2b of the second magnetic member to be tested 2, thereby fixing the second magnetic member to be tested 2 on the mounting seat 92. Specifically, the locking member 93 is fixed to the mounting seat 92 by screws 94.

[0107] In this embodiment, there are multiple locking members 93, and the multiple locking members 93 are detachably mounted on the mounting seat 92, specifically mounted along the circumference of the second magnetic member to be tested 2.

[0108] Specifically, an arc-shaped wall 934 is provided on one side of the fixing portion 931 close to the limiting portion 932. The bending radian of the arc-shaped wall 934 is the same as that of the outer peripheral wall of the second magnetic member to be tested 2, and the arc-shaped wall 934 can abut against the edge of the outer peripheral wall of the second magnetic member to be tested 2 to achieve precise positioning of the second magnetic member to be tested 2 and prevent the second magnetic member to be tested 2 from rotating relative to the mounting seat 92.

[0109] In the illustrated embodiment, each locking member 93 has two limiting portions 932, and the two limiting portions 932 are spaced apart to form a limiting groove 933 for accommodating the blade of the second magnetic member to be tested 2. When fixing the second magnetic member to be tested 2, the two limiting portions 932 on one locking member 93 respectively extend into two adjacent circumferential flow channels 2b of the second magnetic member to be tested 2.

[0110] Since the magnetic force testing tooling of the second embodiment has a structure similar to that of the magnetic force testing tooling 100 of the first embodiment, therefore, the magnetic force testing tooling of the second embodiment also has the advantages of the magnetic force testing tooling 100 of the first embodiment, which will not be elaborated here. It should be noted that since the locking member 93 of the magnetic force testing tooling of the second embodiment can well achieve the installation and positioning of the second magnetic member to be tested 2, therefore, the second embodiment can directly use the impeller of the pump body for testing, without additionally manufacturing a test impeller, reducing the manufacturing cost, reducing the test complexity, and improving the test efficiency.

[0111] It can be understood that the magnetic force testing tooling of the present application is not limited to being applied to testing the magnetic force between the stiffness magnetic ring of the impeller of the blood pump and the central permanent magnet of the blood pump, and can also be applied to the magnetic force between other two magnetic members that need to be nested and used.

[0112] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A magnetic force testing tooling for testing the magnetic force interaction between a first magnetic part to be tested and a second magnetic part to be tested. The second magnetic part to be tested is annular and has a central hole for the first magnetic part to be tested to pass through. Characterized in that, The magnetic force testing tooling includes: A base; A force measuring component, which is installed on the base. The force measuring component has a force measuring end and a force measuring direction, and the force measuring component can detect the force applied to the force measuring end along the force measuring direction; A first mounting component, which is installed on the base and is used for mounting the first magnetic part to be tested; A second mounting component, which is arranged opposite to the first mounting component and is used for mounting the second magnetic part to be tested; Wherein, the second mounting component is slidable relative to the first mounting component in the force measuring direction of the force measuring component, so that the second magnetic part to be tested can slide relative to the first magnetic part to be tested, and the first magnetic part to be tested can shuttle through the central hole of the second magnetic part to be tested along the central axis of the second magnetic part to be tested. The second mounting component is connected to the force measuring end of the force measuring component, so that the second mounting component can transfer the magnetic force interaction between the first magnetic part to be tested and the second magnetic part to be tested to the force measuring end of the force measuring component; A sliding table component, which includes a fixed part and a sliding part that can be slidably installed on the fixed part. The fixed part is installed on the base; and A gripping component, which includes a seat body and a gripping piece. The seat body is installed on the sliding part; the gripping piece is installed on the seat body, and the gripping piece has a locking cavity, and the force measuring end of the force measuring component can be locked in the locking cavity.

2. The magnetic force testing tooling according to claim 1, Characterized in that, The first mounting component includes: A position adjusting mechanism, which is installed on the base; A rotating table capable of mounting the first magnetic part to be tested. The rotating table is installed on the position adjusting mechanism, and the rotating table can drive the first magnetic part to be tested to rotate in a plane perpendicular to the force measuring direction of the force measuring component. Wherein, the position adjusting mechanism can adjust the position of the rotating table in three-dimensional space.

3. The magnetic force testing tooling according to claim 2, Characterized in that, The first mounting component further includes a mounting table, which is installed on the rotating table. The mounting table is provided with a convex platform capable of mounting the first magnetic part to be tested, and the convex platform can pass through the central hole of the second magnetic part to be tested on the second mounting component.

4. The magnetic force testing tooling according to claim 1, Characterized in that, The second mounting component is installed on the sliding part, and the force measuring end of the force measuring component is connected to the sliding part.

5. The magnetic force testing tooling according to claim 1, Characterized in that, The seat body is provided with a mounting cavity with adjustable cavity size, and a part of the gripping piece is clamped in the mounting cavity; And / or, the gripping member includes a rod portion and a locking portion connected to one end of the rod portion. The rod portion is connected to the seat body, and the locking cavity is located in the locking portion; And / or, the height of the locking cavity relative to the sliding member is adjustable; And / or, the position of the seat body on the sliding member is adjustable along the force measuring direction of the force measuring component.

6. The magnetic force testing tooling according to claim 4, wherein, The second mounting assembly includes: A mounting frame fixed on the sliding member; A mounting seat mounted on the mounting frame for detachably mounting the second magnetic member to be tested.

7. The magnetic force testing tooling according to claim 6, wherein, The second mounting assembly further includes a locking member. The locking member includes a fixing portion and at least two spaced limiting arms provided on the fixing portion. The fixing portion is mounted on the mounting seat, and a limiting groove is formed between the two spaced limiting arms. Each limiting arm can be inserted into a circumferential flow channel of the second magnetic member to be tested.

8. The magnetic force testing tooling according to claim 7, wherein, An arc-shaped wall is provided on one side of the fixing portion close to the limiting arm. The bending radian of the arc-shaped wall is the same as the bending radian of the outer peripheral wall of the impeller, and the arc-shaped wall can be abutted against the outer peripheral wall of the impeller.

9. The magnetic force testing tooling according to claim 1, wherein, An installation groove for accommodating the first magnetic member to be tested is formed on the first mounting assembly, and a positioning hole is formed on the second mounting assembly. The magnetic force testing tooling further includes a calibration member. The calibration member can be partially received in the installation groove and partially received in the positioning hole so that the central axes of the first magnetic member to be tested and the second magnetic member to be tested coincide.

10. The magnetic force testing tooling according to claim 9, wherein, The installation groove can make the central axis of the first magnetic member to be tested installed in the installation groove coincide with the central axis of the installation groove, and the second mounting assembly can make the central axis of the first magnetic member to be tested installed on the second mounting assembly coincide with the central axis of the positioning hole; when the calibration member is partially received in the installation groove and partially received in the positioning hole, the central axes of the installation groove and the positioning hole coincide.

11. The magnetic force testing tooling according to claim 9, wherein, The calibration member includes a first disc portion and a second disc portion fixedly connected to the first disc portion. The second disc portion and the first disc portion are coaxial. The first disc portion has a first annular wall adapted to the groove wall of the installation groove, and the second disc portion has a second annular wall adapted to the hole wall of the positioning hole; And / or, the installation groove can simultaneously accommodate the first magnetic member to be tested and a part of the calibration member, and the calibration member can be adsorbed and fixed by the first magnetic member to be tested.

12. The magnetic force testing tooling according to claim 9, wherein, The first mounting component includes a mounting table, on which there is a boss. The boss can pass through the central hole of the second magnetic component to be measured on the second mounting component, and the mounting groove is located at the end of the boss away from the mounting table. The second mounting component includes a mounting seat, on which there is a positioning groove for accommodating the second magnetic component to be measured. The shape and size of the groove wall of the positioning groove are adapted to the outer peripheral wall of the second magnetic component to be measured. The positioning hole is located on the bottom wall of the positioning groove, and the central axis of the positioning hole can coincide with the central axis of the second magnetic component to be measured installed in the positioning groove. Among them, the mounting seat and the mounting table can be arranged opposite to each other along the force-measuring direction of the force-measuring component, and the mounting seat can slide along the force-measuring direction of the force-measuring component.

13. The magnetic force testing tooling according to claim 1, characterized in that at least one of the second mounting component and the second magnetic component to be measured mounted on the second mounting component can be in contact with the first mounting component, and when at least one of the second mounting component and the second magnetic component to be measured mounted on the second mounting component is in contact with the first mounting component, at least a part of the first magnetic component to be measured mounted on the first mounting component passes through the second magnetic component to be measured.

14. The magnetic force testing tooling according to any one of claims 1-13, characterized in that the force-measuring component includes a position adjusting mechanism and a force gauge. The position adjusting mechanism is mounted on the base body, and the force gauge is mounted on the position adjusting mechanism. Among them, the force-measuring end is located on the force gauge, and the position adjusting mechanism can at least drive the force gauge to slide along the force-measuring direction, so that the force gauge can drive the second mounting component to slide along the force-measuring direction.

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