Sealing element and sealing test device

Abstract

The utility model provides a sealing element and a sealing test device, which are used for being matched with a transmission shaft, the sealing element comprises an inner ring, an outer ring which is arranged outside the inner ring along the radial direction and is arranged at an interval with the inner ring, and a sealing ring film which is connected between the outer ring and the inner ring, the sealing ring film covers a gap between the inner ring and the outer ring in the axial direction, the inner ring is provided with a receding hole in the axial direction, the transmission shaft can penetrate through the receding hole, and a radial sealing ring is arranged in the receding hole, surrounds the transmission shaft and abuts against the transmission shaft. According to the sealing element and the sealing test device, by arranging the inner ring, the outer ring and the sealing ring film, on one hand, sealing of the sealing test box is achieved, on the other hand, vibration of the transmission shaft can be prevented from being transmitted to the sealing test box, and the sealing performance and the test result cannot be affected; by arranging the radial sealing ring, the sealing effect at the transmission shaft is improved.

Description

Technical Field

[0001] The utility model relates to a sealing component and a sealing test device. Background Art

[0002] The seals in existing sealing test devices can only isolate the inside and outside, but cannot isolate vibration. When the transmission shaft is indirectly affected by the vibration table and generates vibration, it will be transmitted to the sealing test box through the seals, which may affect the sealing performance and test results.

[0003] In view of this, it is necessary to improve the existing seals to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a sealing component to solve the problem that the existing sealing components are easy to transmit vibration.

[0005] To achieve the above-mentioned purpose, the utility model provides a sealing member for cooperating with a transmission shaft, the sealing member comprising an inner ring, an outer ring radially arranged outside the inner ring and spaced apart from the inner ring, and a sealing ring film connected between the outer ring and the inner ring, the sealing ring film axially covering the gap between the inner ring and the outer ring, the inner ring axially opening a clearance hole for the transmission shaft to pass through, a radial sealing ring being arranged in the clearance hole, the radial sealing ring being arranged around the transmission shaft and abutting against the transmission shaft.

[0006] As a further improvement of the utility model, a positioning ring is further provided in the clearance hole, and the positioning ring is arranged around the transmission shaft. The number of the positioning rings is at least two, and they are respectively arranged on both sides of the radial sealing ring along the axial direction.

[0007] As a further improvement of the present invention, the number of the radial sealing rings is two, the number of the positioning rings is three, and the positioning rings and the radial sealing rings are arranged alternately.

[0008] As a further improvement of the utility model, a limiting block is arranged on the inner ring, the limiting block radially protrudes into the clearance hole, and the positioning rings arranged on both sides along the axial direction are away from one side of the radial sealing ring.

[0009] As a further improvement of the utility model, the inner ring includes a first inner ring and a second inner ring fixed in the axial direction, and the outer ring includes a first outer ring and a second outer ring fixed in the axial direction, a first clamping groove for clamping the sealing ring film is formed between the first inner ring and the second inner ring, and a second clamping groove for clamping the sealing ring film is formed between the first outer ring and the second outer ring.

[0010] As a further improvement of the utility model, the thickness of the sealing ring membrane in the radial direction inside and outside and outside is greater than the thickness in the middle.

[0011] As a further improvement of the present invention, the thickness of the first clamping groove close to the outer ring is smaller than the thickness away from the outer ring, and the thickness of the second clamping groove close to the inner ring is smaller than the thickness away from the inner ring.

[0012] As a further improvement of the present invention, a side of the second outer ring away from the first outer ring is recessed inward to form a sealing groove, and the sealing member further includes an axial sealing ring arranged in the sealing groove.

[0013] As a further improvement of the present invention, the clearance hole is coaxially arranged with the inner ring.

[0014] The utility model also provides a sealing test device, which comprises a sealing test box, a transmission hole opened on the sealing test box, a sealing member as described above arranged in the transmission hole, and a transmission shaft, wherein the transmission shaft passes through the clearance hole.

[0015] The beneficial effects of the utility model are as follows: the seal and the sealing test device of the utility model, by providing the inner ring, the outer ring and the sealing ring film, on the one hand, realize the sealing of the sealing test box, and on the other hand, can avoid the vibration of the transmission shaft from being transmitted to the sealing test box, which will not affect the sealing performance and the test results; the sealing effect at the transmission shaft is improved by providing the radial sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial structural schematic diagram of the sealing test device of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the middle area A;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of the excitation source of the sealing test device of the utility model in the sealing test box;

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the driven part of the sealing test device of the utility model in the sealing test box;

[0020] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of the middle area B;

[0021] Figure 6 It is a structural schematic diagram of the sealing component and part of the transmission components of the sealing test device of the utility model;

[0022] Figure 7 yes Figure 6 A schematic diagram of the structure from another angle;

[0023] Figure 8 yes Figure 6 A schematic diagram of the structure from a top view;

[0024] Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure in the CC direction;

[0025] Fig.10 yes Fig. 9 Schematic diagram of the enlarged structure of area D in the middle. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figures 1 to 10As shown, the sealing test device 100 of the utility model includes a sealing test box 1, a transmission hole 2 opened on the sealing test box 1, a sealing member 3 arranged in the transmission hole 2, a transmission assembly 4, an excitation source 5, a driven member 6, a unit box 7 for placing a control unit, a guide rail 8 arranged below the unit box 7 and the sealing test box 1, and a vibration test table arranged in the sealing test box 1 or protruding into the sealing test box 1.

[0030] In this embodiment, the sealed test box 1 can be a low-pressure test box or a high-pressure test box. Since there is a pressure difference with the outside, it needs to be sealed.

[0031] The sealing test box 1 includes a box body 11 and a door body 12 for opening or closing the box body 11 , and the transmission hole 2 is arranged on the side wall of the box body 11 and / or the door body 12 .

[0032] The excitation source 5 and the driven member 6 are connected through the transmission assembly 4. Both the excitation source 5 and the driven member 6 can be test pieces. Therefore, when one of the excitation source 5 and the driven member 6 is used as a test piece, it needs to be placed in the sealed test box 1, and the other is placed outside the sealed test box 1. The excitation source 5 or the driven member 6 placed in the sealed test box 1 is located on the vibration test table, and is driven by the vibration test table to generate vibration in the horizontal or vertical direction.

[0033] In addition, since the excitation source 5 outputs power in the form of rotation, the excitation source 5 will have a certain displacement when tested on the vibration test bench, and its position is not fixed. Therefore, the transmission component 4 is provided to transmit axial reciprocating motion and rotation.

[0034] The transmission assembly 4 includes a transmission shaft 41 passing through the sealing member 3, a first universal joint 42 disposed at one end of the transmission shaft 41 and located in the sealing test box 1, a second universal joint 43 disposed at the other end of the transmission shaft 41 and located outside the sealing test box 1, a first connecting shaft 44 connected to the first universal joint 42, and a second connecting shaft 45 connected to the second universal joint 43. One of the excitation source 5 and the driven member 6 is connected to the first connecting shaft 44, and the other is connected to the second connecting shaft 45.

[0035] The first universal joint 42 and the second universal joint 43 can transmit both rotation and axial reciprocating motion, thereby preventing the transmission shaft 41 from getting stuck internally due to position changes.

[0036] The sealing test box 1 is provided with a fixing plate 13 which radially protrudes into the transmission hole 2 . A through hole for the transmission shaft 41 to pass through is formed on the fixing plate 13 . The sealing member 3 is fixedly connected to the fixing plate 13 .

[0037] like Figures 6 to 10 As shown, the seal 3 includes an inner ring 31 , an outer ring 32 radially arranged outside the inner ring 31 and spaced apart from the inner ring 31 , a sealing ring film 33 connected between the outer ring 32 and the inner ring 31 , and an axial sealing ring 34 .

[0038] The sealing ring film 33 covers the gap between the inner ring 31 and the outer ring 32 in the axial direction, and the thickness of the sealing ring film 33 in the radial direction at the inner and outer sides is greater than the thickness in the middle.

[0039] The inner ring 31 includes a first inner ring 311 and a second inner ring 312 fixed in the axial direction, and a first clamping groove 313 for clamping the sealing ring film 33 is formed between the first inner ring 311 and the second inner ring 312. The first inner ring 311 and the second inner ring 312 are fixed by a first screw 314. In this embodiment, a plurality of threaded holes are provided on the first inner ring 311 and the second inner ring 312.

[0040] The inner ring 31 of the sealing member 3 is provided with a limit block 318 and a clearance hole 315 formed along the axial direction for the transmission shaft 41 to pass through. The clearance hole 315 is coaxially arranged with the inner ring 31 .

[0041] The outer ring 32 is used for fixed connection with the fixing plate 13. The outer ring 32 comprises a first outer ring 321 and a second outer ring 322 fixed in the axial direction, and a second holding groove 323 for holding the sealing ring film 33 is formed between the first outer ring 321 and the second outer ring 322.

[0042] In this embodiment, the first outer ring 321 is arranged on a side close to the fixing plate 13, and the second outer ring 322 is recessed inwardly on a side away from the first outer ring 321 to form a sealing groove 324, and the axial sealing ring 34 is arranged in the sealing groove 324. The axial sealing ring 34 can improve the good sealing effect between the sealing test box 1 and the sealing member 3.

[0043] The first outer ring 321 and the second outer ring 322 are also provided with a plurality of corresponding screw holes. The first outer ring 321 and the second outer ring 322 are fixedly connected by second screws 325. Meanwhile, the second screws 325 are fixedly connected to the fixing plate 13 after passing through the screw holes on the first outer ring 321 and the second outer ring 322.

[0044] In this embodiment, the inner ring 31 and the outer ring 32 are spaced apart, and when the transmission shaft 41 vibrates slightly, it will only drive the inner ring 31 to vibrate, but will not be transmitted to the outer ring 32, nor to the fixing plate 13 fixedly connected to the outer ring 32 and the sealing test box 1. The sealing member 3 can achieve a good vibration reduction effect. The sealing ring membrane 33 can achieve a sealing effect on the one hand, and has a certain elasticity in the radial direction on the other hand, so as to limit the position of the inner ring 31.

[0045] The thickness of the first clamping groove 313 close to the outer ring 32 is smaller than the thickness away from the outer ring 32, and the thickness of the second clamping groove 323 close to the inner ring 31 is smaller than the thickness away from the inner ring 31. This arrangement can limit the sealing ring film 33 in the radial direction, and prevent the sealing ring film 33 from being pulled off when the inner ring 31 vibrates.

[0046] A radial sealing ring 316 and a positioning ring 317 are disposed in the clearance hole 315. The radial sealing ring 316 is disposed around the transmission shaft 41 and abuts against the transmission shaft 41. The positioning ring 317 is disposed around the transmission shaft 41 and abuts against the transmission shaft 41.

[0047] There are at least two positioning rings 317, which are axially arranged on both sides of the radial sealing ring 316. The positioning ring 317 is made of Teflon material and radially abuts against the transmission shaft 41. The positioning ring 317 can play a lubricating role, facilitate the axial movement or rotation of the transmission shaft 41, provide a certain support strength, and also play a role in positioning the radial sealing ring 316.

[0048] In this embodiment, the number of the radial sealing rings 316 is two, the number of the positioning rings 317 is three, and the positioning rings 317 and the radial sealing rings 316 are alternately arranged.

[0049] In this embodiment, the limiting block 318 protrudes into the clearance hole 315 in the radial direction, and the positioning rings 317 arranged on both sides in the axial direction are away from one side of the radial sealing ring 316 .

[0050] The stopper 318 protrudes radially into the clearance hole 315, and the positioning rings 317 arranged on both sides axially are away from one side of the radial sealing ring 316. The stopper 318 can limit the axial position of the positioning ring 317 and the radial sealing ring 316 to prevent the positioning ring 317 and the radial sealing ring 316 from being separated from the clearance hole 315.

[0051] The seal 3 and the sealing test device 100 of the utility model, by providing an inner ring 31, an outer ring 32 and a sealing ring film 33, on the one hand realize the sealing of the sealing test box 1, and on the other hand, can prevent the vibration of the transmission shaft 41 from being transmitted to the sealing test box 1, which will not affect the sealing performance and the test results; the sealing effect at the transmission shaft 41 is improved by providing the radial sealing ring 316.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A seal for use with a transmission shaft, characterized in that: The sealing member comprises an inner ring, an outer ring radially arranged outside the inner ring and spaced apart from the inner ring, and a sealing ring film connected between the outer ring and the inner ring, wherein the sealing ring film axially covers the gap between the inner ring and the outer ring, the inner ring axially has a clearance hole for the transmission shaft to pass through, a radial sealing ring is arranged in the clearance hole, and the radial sealing ring is arranged around the transmission shaft and abuts against the transmission shaft.

2. The seal according to claim 1, characterized in that: A positioning ring is also provided in the clearance hole. The positioning ring is arranged around the transmission shaft. The number of the positioning rings is at least two and they are respectively arranged on both sides of the radial sealing ring along the axial direction.

3. The seal according to claim 2, characterized in that: The number of the radial sealing rings is two, the number of the positioning rings is three, and the positioning rings and the radial sealing rings are arranged alternately.

4. The seal according to claim 2, characterized in that: The inner ring is provided with a limit block, which protrudes radially into the clearance hole, and the positioning rings arranged on both sides along the axial direction are away from one side of the radial sealing ring.

5. The seal according to claim 1, characterized in that: The inner ring includes a first inner ring and a second inner ring fixed in the axial direction, and the outer ring includes a first outer ring and a second outer ring fixed in the axial direction. A first clamping groove for clamping the sealing ring film is formed between the first inner ring and the second inner ring, and a second clamping groove for clamping the sealing ring film is formed between the first outer ring and the second outer ring.

6. The seal according to claim 5, characterized in that: The thickness of the sealing ring membrane in the radial direction at the inner and outer sides and the outer side is greater than the thickness in the middle part.

7. The seal according to claim 6, characterized in that: The thickness of the first clamping groove close to the outer ring is smaller than the thickness away from the outer ring, and the thickness of the second clamping groove close to the inner ring is smaller than the thickness away from the inner ring.

8. The seal according to claim 5, characterized in that: The side of the second outer ring away from the first outer ring is recessed inward to form a sealing groove, and the sealing member further includes an axial sealing ring arranged in the sealing groove.

9. The seal according to claim 1, characterized in that: The clearance hole is coaxially arranged with the inner ring.

10. A sealing test device, characterized in that: The sealing test device comprises a sealing test box, a transmission hole opened on the sealing test box, a sealing member as claimed in any one of claims 1 to 9 arranged in the transmission hole, and a transmission shaft, wherein the transmission shaft passes through the clearance hole.

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