Dynamic balance testing device

Abstract

The utility model relates to the technical field of testing devices, and provides a dynamic balance testing device which comprises a testing platform and a testing tool, the testing tool is suitable for installing a product to be tested, the testing tool and the testing platform are connected through at least two floating parts, and a detection part used for pressure detection is further arranged between the testing tool and the testing platform. The at least two floating parts and the detection part are arranged in a circumferential array along the axis of the test tool. According to the utility model, the at least two floating parts and the detection part are arranged between the test tool and the test platform, and the at least two floating parts and the detection part are arranged along the circumference of the axis of the test tool in an array manner. Through the arrangement, the dynamic balance test of the to-be-tested product can be realized, and the test device is low in manufacturing cost, high in reliability and more convenient in after-sales maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a dynamic balance testing device. Background Art

[0002] The lifting head is a component located at the top of the single crystal furnace. Its shape and structure will directly affect the growth quality and shape of the single crystal material. The internal structure of the lifting head includes a central channel and side channels. The central channel is used to guide the growth direction of the single crystal material and the passage of the lifting rod, while the side channels are used to introduce cooling gas to help the single crystal material solidify quickly and cool down.

[0003] Since the pulling head on the single crystal furnace can ensure that the single crystal material maintains a stable shape and purity during the growth process, the dynamic balance test of the pulling head is particularly important. If the pulling head is not subjected to a dynamic balance test and an unqualified pulling head is used on the single crystal furnace, the single crystal will shake during the direct pulling process, thereby increasing the risk of the single crystal falling and even causing equipment damage or casualties.

[0004] In the related art, multiple sets of pressure sensors are used to perform dynamic balance tests on the pulling head. The test device has a complex structure, high manufacturing cost, and inconvenient maintenance. Utility Model Content

[0005] The utility model provides a dynamic balance test device to solve the above defects in the prior art, which can not only realize the dynamic balance test of the pulling head, but also has low manufacturing cost, high reliability and more convenient after-sales maintenance.

[0006] The utility model provides a dynamic balance test device, comprising:

[0007] Test platform;

[0008] The test jig is suitable for installing the product to be tested. The test jig is connected to the test platform by at least two floating components. A detection component for pressure detection is also provided between the test jig and the test platform. At least two of the floating components and the detection component are arranged in a circular array along the axis of the test jig.

[0009] According to a dynamic balancing test device provided by the utility model, the floating component comprises:

[0010] A connecting piece, which is clearance-matched with the test fixture and is threadedly connected with the test platform;

[0011] An elastic member is sleeved on the outer side of the connecting member, and the elastic member is located between the test fixture and the test platform so that the test fixture can float relative to the test platform.

[0012] According to a dynamic balancing test device provided by the utility model, the connecting member includes a connecting rod body and a limiting portion connected to each other;

[0013] An end of the connecting rod body away from the limiting portion is provided with an external thread, and the connecting rod body is threadedly connected to the test platform through the external thread; an end of the connecting rod body close to the limiting portion is gap-matched with the test fixture, and the limiting portion abuts against the test fixture.

[0014] According to a dynamic balancing test device provided by the utility model, the floating component further includes a first gasket;

[0015] The first gasket is sleeved on the connecting rod body and is located between the limiting portion and the testing fixture.

[0016] According to a dynamic balancing test device provided by the utility model, the floating component also includes:

[0017] A limiting sleeve is sleeved on the outer side of the elastic member, and a height of the limiting sleeve is smaller than a gap between the test fixture and the test platform, so as to form a floating gap between the test fixture and the limiting sleeve.

[0018] According to a dynamic balancing test device provided by the utility model, the test tool comprises:

[0019] Transition bracket, suitable for installing the product to be tested;

[0020] A base is arranged at the bottom of the transition bracket, and the base and the transition bracket are connected through a leveling component; at least two floating components connect the base and the test platform, and the detection component is located between the base and the test platform.

[0021] According to a dynamic balancing test device provided by the utility model, the leveling component includes a plurality of fasteners and a plurality of leveling members, the plurality of fasteners and the plurality of leveling members are arranged in a circumferential array, and the fasteners and the leveling members are arranged at intervals;

[0022] The fasteners are respectively connected to the transition bracket and the base by threads; the leveling member is connected to the transition bracket by threads, and an end of the leveling member abuts against the base.

[0023] According to a dynamic balancing test device provided by the utility model, the leveling component further includes a second gasket; the second gasket is sleeved on the fastener and is located between the end of the fastener and the transition bracket.

[0024] According to a dynamic balancing test device provided by the utility model, the leveling component further includes an anti-loosening gasket; the anti-loosening gasket is sleeved on the fastener and is located between the end of the fastener and the second gasket.

[0025] According to a dynamic balancing test device provided by the utility model, the product to be tested is a pulling head, and the pulling head is suitable for being installed on the test fixture.

[0026] The dynamic balance test device provided by the utility model is provided with at least two floating components and one detection component between the test fixture and the test platform, and the at least two floating components and one detection component are arranged in a circular array along the axis of the test fixture. Since three non-collinear points determine a plane, the at least two floating components and one detection component are arranged in a circular array along the axis of the test fixture, which is equivalent to the floating components and the detection components cooperating to support the test fixture to form a support plane. With such an arrangement, a detection component can record and observe the change process of the pressure value of the detection component with the phase during the self-rotation process of the product to be tested. When the pressure value fluctuates with the phase within a preset range, it is determined that the dynamic balance test of the product to be tested is qualified. The test device can not only realize the dynamic balance test of the product to be tested, but also has a simple structure, low manufacturing cost, high reliability, and more convenient after-sales maintenance.

[0027] Specifically, when it is necessary to perform a dynamic balance test on the product to be tested, first fix the product to be tested on the test fixture by fasteners such as screws and bolts, then control the product to be tested to rotate one circle, and then use the detection component to detect the pressure change value with phase (or time). When the pressure change value meets the preset requirements, the dynamic balance test of the product to be tested is judged to be qualified, otherwise it is unqualified and the dynamic balance adjustment of the product to be tested is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a structural schematic diagram of a dynamic balancing test device provided by an embodiment of the utility model;

[0030] Figure 2 It is a front view of the dynamic balancing test device provided by an embodiment of the utility model;

[0031] Figure 3 yes Figure 2 The local structure section view along the AA line;

[0032] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0033] Reference numerals:

[0034] 100. Test platform;

[0035] 200, test fixture; 210, transition bracket; 220, base;

[0036] 300, floating component; 310, connecting member; 311, connecting rod body; 312, limiting part; 320, elastic member; 330, first gasket; 340, limiting sleeve;

[0037] 400, detection components;

[0038] 500, leveling component; 510, fastener; 520, leveling component; 530, second gasket; 540, anti-loosening gasket; 600, pulling head. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0041] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] Figure 1 It is a structural schematic diagram of a dynamic balancing test device provided by an embodiment of the utility model; Figure 2 It is a front view of the dynamic balancing test device provided by an embodiment of the utility model; Figure 3 yes Figure 2 The local structure section view along the AA line; Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0044] See also Figures 1 to 4 An embodiment of the utility model provides a dynamic balancing test device, which includes a test platform 100 and a test fixture 200. The test platform 100 serves as a mounting carrier of the entire dynamic balancing test device and is used to mount the test fixture 200.

[0045] The test platform 100 may include a table top and support legs. The support legs are connected to the bottom of the table top and are used to support the table top so that the table top has a certain height above the ground, which is convenient for operators to operate the test tool 200.

[0046] The test jig 200 is suitable for installing the product to be tested. The test jig 200 is connected to the test platform 100 by at least two floating components 300, that is, the test jig 200 can float up and down relative to the test platform 100. A detection component 400 for pressure detection is also provided between the test jig 200 and the test platform 100. At least two floating components 300 and the detection component 400 are arranged in a circular array along the axis of the test jig, that is, when two floating components 300 are provided, the two floating components 300 and the detection component 400 are arranged in a circular array around the axis of the test jig. Since three non-collinear points can determine a plane, therefore, arranging at least two floating components 300 and one detection component 400 in a circular array along the axis of the test jig 200 is equivalent to the floating components 300 and the detection components 400 cooperating to support the test jig 200 together to form a support plane. With this arrangement, a detection component 400 can be used to record and observe the change of the pressure value of the detection component 400 with the phase during the self-rotation of the product to be tested. When the pressure value fluctuation with the phase is within a preset range, it is determined that the dynamic balance test of the product to be tested has passed.

[0047] Specifically, when it is necessary to perform a dynamic balance test on the product to be tested, the product to be tested is first fixedly connected to the test fixture 200 by fasteners 510 such as screws and bolts, and then the product to be tested is controlled to rotate one circle, and then the pressure change value of the pressure with the phase (or time) is detected by the detection component 400. When the pressure change value meets the preset requirements, the dynamic balance test of the product to be tested is determined to be qualified, otherwise it is unqualified and the dynamic balance adjustment of the product to be tested is required.

[0048] It should be noted that the product to be tested may be a lifting head 600 for a single crystal furnace, or other components capable of generating self-rotation, such as a rotor. The following embodiments of the present invention are described by taking the lifting head 600 as an example.

[0049] It can be understood that the dynamic balancing test device provided by the embodiment of the utility model is provided by arranging at least two floating components 300 and one detection component 400 between the test fixture 200 and the test platform 100, and arranging at least two floating components 300 and one detection component 400 in a circular array along the axis of the test fixture. Since three non-collinear points determine a plane, arranging at least two floating components 300 and one detection component 400 in a circular array along the axis of the test fixture is equivalent to the floating components 300 and the detection components 400 supporting the test fixture 200 to form a support plane. With such an arrangement, the pressure value of the detection component 400 can be recorded and observed during the self-rotation process of the product to be tested by a detection component 400. When the pressure value fluctuates with the phase within a preset range, it is determined that the dynamic balancing test of the product to be tested is qualified. The test device can not only realize the dynamic balancing test of the product to be tested, but also has a simple structure, low manufacturing cost, high reliability, and more convenient after-sales maintenance.

[0050] Continue reading Figure 3 and Figure 4 In some embodiments of the utility model, the floating component 300 includes a connector 310 and an elastic member 320. The connector 310 is passed through the test fixture 200 and has a clearance fit with the test fixture 200. The connector 310 is threadedly connected to the test platform 100, which is equivalent to one end of the connector 310 being fixed to the test platform 100 and the other end being limited to the test fixture 200. The connector 310 has a clearance fit with the test fixture 200, so that the test fixture 200 can float along the connector 310.

[0051] The elastic member 320 is a structure with elastic deformation such as a spring. The elastic member 320 is sleeved on the outside of the connecting member 310, and the elastic member 320 is located between the test fixture 200 and the test platform 100, so that the test fixture 200 can float relative to the test platform 100 under the support of the connecting member 310 and the vibration during the self-rotation of the product to be tested.

[0052] Since the test fixture 200 is mainly used to support and install the product to be tested, such as the lifting head 600. When the product to be tested is in the process of self-rotation, it will produce a certain vibration effect on the test fixture 200, and the test fixture 200 is connected by the connection member 310 and the elastic member 320 to achieve the floating of the test fixture 200. In this way, a detection component 400 can be used to detect the pressure of the product to be tested during the self-rotation process, and multiple detection components 400 can be replaced to detect the dynamic balance of the product to be tested. The test device has a simple structure, a lower manufacturing cost, a single detection data, and a better control of the detection effect.

[0053] Continue reading Figure 4In some embodiments of the utility model, the connecting member 310 includes a connecting rod body 311 and a limiting portion 312 that are connected to each other. One end of the connecting rod body 311 away from the limiting portion 312 is provided with an external thread. The connecting rod body 311 is threadedly connected to the test platform 100 through the external thread. One end of the connecting rod body 311 close to the limiting portion 312 is clearance-matched with the test fixture 200, and the limiting portion 312 abuts against the test fixture 200.

[0054] Equivalently, the connecting member 310 can be set as a bolt with partial thread, through which not only the connection between the test fixture 200 and the test platform 100 can be realized, but also a guide can be provided for the elastic member 320, so that the test fixture 200 can float up and down relative to the test platform 100 under the support of the elastic member 320.

[0055] The above connection process is equivalent to opening a threaded hole on the test platform 100 for connecting the connecting rod body 311 with an external thread. A through hole can also be opened on the test platform 100, and nuts are set on the upper and lower sides of the test platform 100. The nuts and the connecting rod body 311 are used to cooperate to realize the threaded connection between the connecting rod body 311 and the test platform 100.

[0056] Continue reading Figure 4 In some embodiments of the present invention, the floating component 300 further includes a first gasket 330 , which is sleeved on the connecting rod body 311 , and the first gasket 330 is located between the limiting portion 312 and the test fixture 200 .

[0057] Among them, the first gasket 330 can be a flat washer. The first gasket 330 is arranged between the limit part 312 and the test fixture 200, which can improve the stress condition of the test fixture 200 and protect the surface state of the test fixture 200, that is, increase the contact area between the limit part 312 and the test fixture 200, reduce friction and pressure, and play a protective role.

[0058] Continue reading Figure 4 In some embodiments of the present invention, the floating component 300 also includes a limiting sleeve 340 of a cylindrical structure, which is sleeved on the outside of the elastic component 320, and the height of the limiting sleeve 340 is smaller than the gap between the test fixture 200 and the test platform 100, so as to form a floating gap between the test fixture 200 and the limiting sleeve 340.

[0059] With this arrangement, when the product to be tested is controlled to rotate once, the vibration effect of the product to be tested on the test fixture 200 can be absorbed by the elastic member 320, so as to drive the test fixture 200 to float in the floating gap, and the dynamic balance detection of the product to be tested can be realized with the detection component 400. In addition, during the compression or reset process of the elastic member 320, the inner side of the elastic member 320 is limited by the connecting rod body 311, and the outer side of the elastic member 320 is limited by the limiting sleeve 340, which is equivalent to the elastic member 320 being located in the limiting space limited by the limiting sleeve 340 and the connecting rod body 311. The elastic member 320 has better guidance during the deformation and reset process, and is not easy to tilt or be damaged.

[0060] Continue reading Figures 1 to 4 Based on any one of the above embodiments, different from the above embodiments, the test tool 200 can be understood to be set as an integral part or separately. In this embodiment, the test tool 200 is set separately, that is, the test tool 200 includes a transition bracket 210 and a base 220.

[0061] Among them, the transition bracket 210 is used to install the product to be tested, the base 220 is arranged at the bottom of the transition bracket 210, the base 220 and the transition bracket 210 are connected by a leveling component 500, the base 220 and the test platform 100 are connected by at least two floating components 300, and a detection component 400 for pressure detection is also arranged between the base 220 and the test platform 100.

[0062] This arrangement is equivalent to adjusting not only the relative position between the base 220 and the test platform 100, but also the relative position between the base 220 and the transition bracket 210. Therefore, before the test, the relative position between the transition bracket 210 and the base 220 can be adjusted by the leveling component 500 to ensure that the product to be tested is installed horizontally on the transition bracket 210.

[0063] The product to be tested is then fixedly connected to the test fixture 200 by fasteners 510 such as screws and bolts, and then the product to be tested is controlled to rotate one circle, and then the pressure change value with phase (or time) is detected by the detection component 400. When the pressure change value meets the preset requirements, the dynamic balance test of the product to be tested is determined to be qualified, otherwise it is unqualified and the dynamic balance adjustment of the product to be tested is required.

[0064] Continue reading Figure 4In some embodiments of the present invention, the leveling component 500 includes a plurality of fasteners 510 and a plurality of leveling members 520, which are arranged in a circumferential array and are arranged at intervals. The fasteners 510 are threadedly connected to the transition bracket 210 and the base 220, respectively; the leveling member 520 is threadedly connected to the transition bracket 210, and the end of the leveling member 520 abuts against the upper surface of the base 220.

[0065] In the embodiment of the utility model, the transition bracket 210 and the base 220 are connected by a fastener 510, and the leveling member 520 is threadedly connected to the transition bracket 210, and the end of the leveling member 520 is abutted against the upper surface of the base 220 to adjust the installation gap between the transition bracket 210 and the base 220, and then the installation gap between the transition bracket 210 and the base 220 is adjusted to adjust the parallelism of the transition bracket 210, thereby indirectly adjusting the parallelism of the product to be tested (such as the lifting head 600) fixed on the transition bracket 210, so as to ensure that the product to be tested (such as the lifting head 600) is horizontally installed on the transition bracket 210, and to ensure that the dynamic balance test accuracy of the product to be tested is higher.

[0066] Continue reading Figure 4 In some embodiments of the present invention, the leveling component 500 further includes a second gasket 530 , which is sleeved on the fastener 510 and located between the end of the fastener 510 and the transition bracket 210 .

[0067] The second gasket 530 has the same function as the first gasket 330, that is, the second gasket 530 may also be a flat washer. By providing the second gasket 530 between the end of the fastener 510 and the transition bracket 210, the stress condition of the transition bracket 210 can be improved, and the surface condition of the transition bracket 210 can be protected, that is, the contact area between the end of the fastener 510 and the transition bracket 210 is increased, friction and pressure are reduced, and the transition bracket 210 is protected.

[0068] Continue reading Figure 4 In some embodiments of the present invention, the leveling component 500 further includes an anti-loosening gasket 540 , which is sleeved on the fastener 510 and located between the end of the fastener 510 and the second gasket 530 .

[0069] It is equivalent to setting an anti-loosening gasket 540 above the second gasket 530. The anti-loosening gasket 540 contacts the end of the fastener 510 to play a locking role and prevent the fastener 510 from loosening. The anti-loosening gasket 540 can be a spring washer. After the fastener 510 is tightened, it will increase the axial tension between the fastener 510 and the transition bracket 210 and the base 220 by its own reaction force, thereby increasing the friction force to play an anti-loosening role.

[0070] It should be noted that in the dynamic balancing test device provided in the embodiment of the utility model, the detection component can be a pressure sensor, which can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

[0071] Continue reading Figures 1 to 4 The working process and working principle of the embodiment of the utility model are described by taking the pulling head on the single crystal furnace as an example:

[0072] First, the stiffness coefficient of the elastic member 320 is designed according to the support requirements, and the base 220 of the test fixture 200 is supported on the test platform 100 through two floating components 300 and a pressure sensor arranged along a circumferential array.

[0073] Before using the dynamic balancing test device provided in the embodiment of the utility model to perform a dynamic balancing test on the pulling head 600, first adjust the installation gap between the transition bracket 210 and the base 220 by using multiple fasteners 510 and multiple leveling parts 520, and then adjust the installation gap between the transition bracket 210 and the base 220 to achieve the parallelism adjustment of the transition bracket 210, thereby indirectly adjusting the parallelism of the pulling head 600 fixed on the transition bracket 210 to ensure that the pulling head 600 is horizontally installed on the transition bracket 210.

[0074] The control is to perform periodic self-rotational motion during the dynamic balancing test. When the lifting head 600 rotates to all phases, the pressure value fluctuation of the pressure sensor is within a preset range, and the dynamic balancing test can be determined to be qualified. During the test process, the dynamic balancing test device provided by the embodiment of the utility model only needs to confirm that the reading amplitude of one group of pressure sensors is within a certain range to determine that the dynamic balancing test is qualified. Compared with the test using multiple groups of pressure sensors, the structure is simpler, the manufacturing cost is low, the maintenance is convenient, and the practicality is strong.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A dynamic balance test device, characterized in that: include: Test platform; The test jig is suitable for installing the product to be tested. The test jig is connected to the test platform by at least two floating components. A detection component for pressure detection is also provided between the test jig and the test platform. At least two of the floating components and the detection component are arranged in a circular array along the axis of the test jig.

2. The dynamic balancing test device according to claim 1, characterized in that: The floating component comprises: A connecting piece, which is clearance-matched with the test fixture and is threadedly connected with the test platform; An elastic member is sleeved on the outer side of the connecting member, and the elastic member is located between the test fixture and the test platform so that the test fixture can float relative to the test platform.

3. The dynamic balancing test device according to claim 2, characterized in that: The connecting member comprises a connecting rod body and a limiting portion which are connected to each other; An end of the connecting rod body away from the limiting portion is provided with an external thread, and the connecting rod body is threadedly connected to the test platform through the external thread; an end of the connecting rod body close to the limiting portion is gap-matched with the test fixture, and the limiting portion abuts against the test fixture.

4. The dynamic balancing test device according to claim 3, characterized in that: The floating component also includes a first gasket; The first gasket is sleeved on the connecting rod body and is located between the limiting portion and the testing fixture.

5. The dynamic balancing test device according to claim 2, characterized in that: The floating component also includes: A limiting sleeve is sleeved on the outer side of the elastic member, and a height of the limiting sleeve is smaller than a gap between the test fixture and the test platform, so as to form a floating gap between the test fixture and the limiting sleeve.

6. The dynamic balancing test device according to any one of claims 1 to 5, characterized in that: The test tooling comprises: Transition bracket, suitable for installing the product to be tested; A base is arranged at the bottom of the transition bracket, and the base and the transition bracket are connected through a leveling component; at least two floating components connect the base and the test platform, and the detection component is located between the base and the test platform.

7. The dynamic balancing test device according to claim 6, characterized in that: The leveling component comprises a plurality of fasteners and a plurality of leveling members, wherein the plurality of fasteners and the plurality of leveling members are arranged in a circumferential array, and the fasteners and the leveling members are arranged at intervals; The fasteners are respectively connected to the transition bracket and the base by threads; the leveling member is connected to the transition bracket by threads, and an end of the leveling member abuts against the base.

8. The dynamic balancing test device according to claim 7, characterized in that: The leveling component further includes a second gasket; The second gasket is sleeved on the fastener and is located between the end of the fastener and the transition bracket.

9. The dynamic balancing test device according to claim 8, characterized in that: The leveling component also includes an anti-loosening gasket; The anti-loosening gasket is sleeved on the fastener and is located between the end of the fastener and the second gasket.

10. The dynamic balancing test device according to any one of claims 1 to 5, characterized in that: The product to be tested is a pulling head, and the pulling head is suitable for being installed on the testing tooling.

Images