Sealing performance testing device of rotating shaft system

Abstract

The utility model relates to the technical field of assembly detection, and discloses a sealing performance testing device of a rotating shaft system, which comprises a closed box body, a barometer and a one-way valve are arranged on the side wall of the box body, a through hole A is arranged at the top of the box body, a cover plate is separably arranged at the top of the box body, the cover plate is used for sealing the through hole A, and a through hole B is arranged on the cover plate. The B through hole is used for installing a to-be-tested rotating shaft system, sealing structures are arranged between the to-be-tested rotating shaft system and the cover plate and between the cover plate and the box body, and the sealing structures are used for preventing gas leakage in the box body. The beneficial effects of the utility model are that the sealing performance of the dynamic sealing part of the rotating shaft system to be tested can be detected through the tool after the rotating shaft system is assembled, and the rotating shaft system does not need to be assembled on an official structural member for detection, thereby shortening the time cost, reducing the risk of structural damage caused by frequent disassembly of the official structural member, and improving the working efficiency. And meanwhile, the problem of influence on the service life of the bearing caused by hole detection on the bearing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly detection, in particular to a sealing test device for a rotating shaft system. Background Art

[0002] For airborne optoelectronic turntables, due to restrictions on the use environment, it is often necessary to isolate the inside of the optoelectronic turntable from the outside world to achieve a sealed state inside the entire turntable. However, since the turntable needs to rotate some structures during operation, in order to achieve the internal sealing of the turntable, it is necessary to combine static seals with dynamic seals. The dynamic seal of the turntable is often designed at the rotating shaft system position, but due to processing errors and assembly influences, after the rotating shaft system is installed in the turntable, when the air tightness of the whole machine is tested, the dynamic seal at the rotating shaft system often fails and leakage occurs. At this time, the shaft system components are dismantled, and then reassembled and tested, which greatly wastes human resources. In addition, multiple disassembly and assembly on the sample equipment will also cause damage to the structural parts themselves, reducing their reliability.

[0003] The Chinese utility model patent (authorization announcement number: CN215767529U name: a wheel hub bearing air tightness detection device) includes an air intake pipe, an air pressure valve, an air pressure gauge, a connecting hose and a water tank. The upper part of the water tank is provided with a mounting hole matching the air intake pipe. The air intake pipe is fixed to the air pressure valve and the water tank through a nut. The two ends of the connecting hose are respectively connected to the water tank and the outer ring through air pipe joints, and are connected to the inside of the bearing. The water tank is provided with water, and the water level exceeds the placed wheel hub bearing. The utility model is easy to detect, the test results can be seen in real time, and real-time adjustments can be made to speed up the production progress. The overall structure is simple and the cost is low. However, it needs to open a hole in the bearing for testing, and the service life of the bearing after the hole is opened will be affected. Utility Model Content

[0004] The utility model aims to provide a sealing test device for a rotating shaft system to overcome the shortcomings of the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: a sealing test device for a rotating shaft system, comprising a closed box, a pressure gauge is installed on the side wall of the box, the pressure gauge is used to measure the air pressure value in the box, a one-way valve is also installed on the side wall of the box, the one-way valve is used to replenish the gas in the box, a through hole A is opened on the top of the box, a cover plate is detachably provided on the top of the box, the cover plate is used to seal the through hole A, a through hole B is opened on the cover plate, the through hole B is used to install the rotating shaft system to be tested, a sealing structure is provided between the rotating shaft system to be tested and the cover plate, and between the cover plate and the box, the sealing structure is used to prevent gas leakage in the box.

[0006] Preferably, the sealing structure includes an annular groove and a sealing ring, the annular groove, the A through hole and the B through hole are coaxial, the sealing ring is installed in the annular groove, the annular groove between the rotating shaft system to be tested and the cover plate is opened on the cover plate, and the annular groove between the cover plate and the box body is opened on the box body.

[0007] Preferably, there are two sealing structures between the rotating shaft system to be tested and the cover plate, and two sealing structures between the cover plate and the box body, and the annular groove on the box body and the annular groove on the cover plate are coaxial.

[0008] Preferably, the sealing ring comprises a rubber main body ring, an A raised ring is integrally formed on the inner ring or the outer ring of the main body ring, the A raised ring is concentric with the main body ring, the A raised ring extends to the bottom of the main body ring, and the connection between the A raised ring and the side wall of the main body ring is smoothly transitioned, the annular groove is adapted to the main body ring with the A raised ring integrally formed therewith, a B raised ring is integrally formed on the top of the main body ring, the B raised ring is concentric with the main body ring, the connection between the B raised ring and the side wall of the main body ring is smoothly transitioned, and the top of the B raised ring is located above the notch of the annular groove.

[0009] Preferably, a contraction groove is provided at the bottom of the body ring, and the contraction groove is ring-shaped and has the same center as the body ring.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] After the rotating shaft system is assembled, the sealing performance of the dynamic seal of the rotating shaft system to be tested can be tested through this tooling without assembling it on the formal structural parts for testing. This shortens the time cost and reduces the risk of structural damage to the formal structural parts due to frequent disassembly. At the same time, it avoids the problem of the bearing service life being affected by the hole inspection on the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 Schematic diagram of the installation structure of the sealing ring;

[0014] In the figure, 1-box, 2-pressure gauge, 3-check valve, 4-A through hole, 5-cover plate, 6-B through hole, 7-rotating shaft system to be tested, 8-annular groove, 9-body ring, 10-A raised ring, 11-B raised ring, 12-contraction groove. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1As shown, a sealing test device for a rotating shaft system comprises a sealed box body 1, a pressure gauge 2 is installed on the side wall of the box body 1, the pressure gauge 2 is used to measure the air pressure value in the box body 1, a one-way valve 3 is also installed on the side wall of the box body 1, the one-way valve 3 is used to supplement the gas in the box body 1, a through hole A 4 is opened on the top of the box body 1, a cover plate 5 is detachably provided on the top of the box body 1, the cover plate 5 is used to seal the through hole A 4, a through hole B 6 is opened on the cover plate 5, the through hole B 6 is used to install a rotating shaft system 7 to be tested, a sealing structure is provided between the rotating shaft system 7 to be tested and the cover plate 5, and between the cover plate 5 and the box body 1, the sealing structure is used to prevent gas leakage in the box body 1, after the rotating shaft system is assembled, the sealing performance of the dynamic seal of the rotating shaft system 7 to be tested can be tested by this tooling, without assembling it on the formal structural parts for testing, which shortens the time cost, reduces the risk of structural damage to the formal structural parts due to frequent disassembly, and avoids the problem of the hole detection on the bearing affecting the service life of the bearing.

[0022] In this embodiment, if Figure 1 As shown, the sealing structure includes an annular groove 8 and a sealing ring. The annular groove 8, the A through hole 4 and the B through hole 6 are coaxial. The sealing ring is installed in the annular groove 8. The annular groove 8 between the rotating shaft system 7 to be tested and the cover plate 5 is opened on the cover plate 5, and the annular groove 8 between the cover plate 5 and the box body 1 is opened on the box body 1. There are two sealing structures between the rotating shaft system 7 to be tested and the cover plate 5, and two sealing structures between the cover plate 5 and the box body 1. The annular groove 8 on the box body 1 and the annular groove 8 on the cover plate 5 are coaxial. The double-layer sealing ring further improves the sealing performance.

[0023] In this embodiment, if Figure 2As shown, the sealing ring includes a rubber body ring 9, an A raised ring 10 is integrally formed on the inner ring or the outer ring of the body ring 9, the A raised ring 10 is cocentric with the body ring 9, the A raised ring 10 extends to the bottom of the body ring 9, and the connection between the A raised ring 10 and the side wall of the body ring 9 is smoothly transitioned, the annular groove 8 is adapted to the body ring 9 integrally formed with the A raised ring 10, and a B raised ring 11 is integrally formed on the top of the body ring 9, the B raised ring 11 is cocentric with the body ring 9, the connection between the B raised ring 11 and the side wall of the body ring 9 is smoothly transitioned, and the top of the B raised ring 11 is located above the notch of the annular groove 8. The sealing ring is not working. When the sealing ring is in operation, the A raised ring 10 is stuck in the annular groove 8 to prevent the sealing ring from falling out of the annular groove 8, and the sealing ring is prevented from being stuck in the annular groove 8 by virtue of its deformation. When the sealing ring is working, the B raised ring 11 is pressed into the annular groove 8, and the entire sealing ring is deformed, thereby filling the gap between the sealing ring and the annular groove 8, preventing leakage while avoiding secondary deformation of the sealing ring (the O-ring is stuck in the annular groove 8 by primary deformation, and needs to seal the gap between the two workpieces when working, so the part protruding above the annular groove 8 will be compressed into the annular groove 8, which is secondary deformation), and the stress in the sealing ring is too large to cause damage.

[0024] In this embodiment, if Figure 2 As shown, a shrinkage groove 12 is provided at the bottom of the main body ring 9. The shrinkage groove 12 is ring-shaped and concentric with the main body ring 9. When the sealing ring is installed into the annular groove 8, the shrinkage groove 12 deforms and shrinks, making it easier to install the sealing ring. After installation, the sealing ring is restored under the action of elastic force and is stuck in the annular groove 8. The structure is stable and not easy to fall off.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing test device for a rotating shaft system, comprising a sealed box (1), a pressure gauge (2) being installed on the side wall of the box (1), the pressure gauge (2) being used to measure the air pressure value in the box (1), characterized in that: A one-way valve (3) is also installed on the side wall of the box body (1), and the one-way valve (3) is used to replenish the gas in the box body (1). A through hole (4) is provided on the top of the box body (1). A cover plate (5) is detachably provided on the top of the box body (1), and the cover plate (5) is used to seal the through hole (4). A through hole (6) is provided on the cover plate (5), and the through hole (6) is used to install a rotating shaft system (7) to be tested. A sealing structure is provided between the rotating shaft system (7) to be tested and the cover plate (5), and between the cover plate (5) and the box body (1), and the sealing structure is used to prevent leakage of gas in the box body (1).

2. The sealing test device for a rotating shaft system according to claim 1, characterized in that: The sealing structure comprises an annular groove (8) and a sealing ring, wherein the annular groove (8), the A through hole (4) and the B through hole (6) are coaxial, and the sealing ring is installed in the annular groove (8). The annular groove (8) between the rotating shaft system (7) to be tested and the cover plate (5) is provided on the cover plate (5), and the annular groove (8) between the cover plate (5) and the housing (1) is provided on the housing (1).

3. The sealing test device for a rotating shaft system according to claim 2, characterized in that: There are two sealing structures between the rotating shaft system (7) to be tested and the cover plate (5), and two sealing structures between the cover plate (5) and the box body (1), and the annular groove (8) on the box body (1) and the annular groove (8) on the cover plate (5) are coaxial.

4. The sealing test device for a rotating shaft system according to claim 2, characterized in that: The sealing ring comprises a rubber main body ring (9), an A raised ring (10) is integrally formed on the inner ring or the outer ring of the main body ring (9), the A raised ring (10) is cocentric with the main body ring (9), the A raised ring (10) extends to the bottom of the main body ring (9), and the connection between the A raised ring (10) and the side wall of the main body ring (9) is smoothly transitioned, the annular groove (8) is adapted to the main body ring (9) integrally formed with the A raised ring (10), a B raised ring (11) is integrally formed on the top of the main body ring (9), the B raised ring (11) is cocentric with the main body ring (9), the connection between the B raised ring (11) and the side wall of the main body ring (9) is smoothly transitioned, and the top of the B raised ring (11) is located above the notch of the annular groove (8).

5. The sealing test device for a rotating shaft system according to claim 4, characterized in that: A contraction groove (12) is provided at the bottom of the body ring (9); the contraction groove (12) is circular and has the same center as the body ring (9).

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