Sealing device of signal line and compressor

Abstract

The invention belongs to the technical field of compressor / signal line sealing, and particularly provides a sealing device of a signal line and a compressor. The problem that an existing compressor signal line sealing interface is poor in sealing effect is solved. A sealing device of a signal line comprises a connecting piece which is provided with a T-shaped hole allowing the signal line to pass through; the sealing assembly is arranged in the T-shaped hole and used for blocking airflow at a sealing gap between the signal line and the sealing pipe; the base is provided with a through hole allowing the signal line to penetrate through, and part of the base can be embedded into the T-shaped hole so as to abut against the sealing assembly. The sealing effect of the signal line interface end of the compressor is improved, and air flow in the compressor is effectively prevented from leaking from the signal line.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor / signal line sealing, and specifically provides a sealing device for a signal line and a compressor. Background Art

[0002] With the development of compressor technology, there are more and more testing technologies and means, and the types of measuring instruments are also increasing. When measuring the parameters inside the compressor flow channel, it is often necessary to drill holes in the casing and lead the signal line through the holes to the outside of the compressor for testing inside the compressor. This makes it easy for the airflow inside the compressor to leak at the signal line interface of the compressor, and it is necessary to seal the interface of the signal line on the compressor.

[0003] The existing sealing methods include two types. One is to fill the casing hole with sealant to ensure that the compressor does not leak air. However, since the signal line structure is a signal connector at both ends and a cable in the middle, and the size of the connector is much larger than the diameter of the cable, the size of the casing hole of the compressor is large, which results in an unsatisfactory sealing effect of the sealant filling method; at the same time, the signal line is also easily damaged during the process of removing the instrument line.

[0004] Therefore, there is an urgent need for a signal line sealing device to solve the above problems. Summary of the Invention

[0005] One object of the present invention is to solve the problem of poor sealing effect of the existing compressor signal line sealing interface.

[0006] To achieve the above object, the present invention provides a sealing device for a signal line, including:

[0007] A connecting member, which is provided with a "T"-shaped hole allowing the signal line to pass through;

[0008] A sealing assembly, which is arranged in the "T"-shaped hole and is used to block the airflow at the sealing gap between the signal line and the sealing tube;

[0009] A base, which is provided with a through hole allowing the signal line to pass through, and a part of the base can be embedded into the "T"-shaped hole to press the sealing assembly tightly.

[0010] Further, the sealing assembly includes: a first sealing assembly, which forms one or more connected sealing chambers inside, and the airflow forms a labyrinth seal through one or more of the sealing chambers to block part of the airflow; a second sealing assembly, which presses against the first sealing assembly and is used to block all the airflow on the side of the first sealing assembly.

[0011] Further, the first sealing assembly includes a first axial fixing ring and one or more stages of seals. The first axial fixing ring abuts against the inner edge of the connecting member, and the first axial fixing ring is used to fix the signal line; one or more stages of the seals form one or more of the sealing chambers, and the opening of each sealing chamber faces the first axial fixing ring.

[0012] Further, the second sealing assembly includes a sealing ring and a sealing ring fixing member. The sealing ring fixing member has a sealing ring mounting groove, and the sealing ring is disposed in the sealing ring mounting groove for blocking the air flow on the side of one or more stages of the seals.

[0013] Further, the sealing ring fixing member includes a fixing member and a second axial fixing ring. The fixing member abuts tightly against one or more stages of the seals; a sealing ring mounting groove is formed between the fixing member and the second axial fixing ring, and the sealing ring is disposed in the sealing ring mounting groove; the end of the base abuts tightly against the second axial fixing ring.

[0014] Further, one stage of the seals has one sub-seal, and one sub-seal and the first axial fixing ring form one of the seal chambers; multiple stages of the seals are composed of multiple sub-seals, and adjacent two sub-seals form one of the sealing chambers.

[0015] Further, any one or more of the first axial fixing ring, one or more stages of the seals, the fixing member, and the second axial fixing ring are arranged in a symmetric split structure.

[0016] Further, a compressor includes the sealing device for the signal line described in any one of the above.

[0017] Further, the outer sides of the connecting member and the base are both configured with a threaded structure for mating with the compressor signal line interface.

[0018] Based on the foregoing description, those skilled in the art can understand that in the foregoing technical solution of the present invention, by passing the signal line through the "T"-shaped hole and installing the sealing assembly in the connecting member, one end of the sealing assembly abuts against the edge of the "T"-shaped hole, and the other end of the sealing assembly abuts tightly against the connecting member through the base, so as to seal the signal line interface in the compressor. The present invention effectively improves the sealing effect of the compressor signal line interface end by adding a sealing device at the compressor signal line interface, and avoids the problem of air leakage in the compressor from the signal line.

[0019] Further, a labyrinth seal is formed by creating multiple sealed chambers within the first sealing assembly. This causes the high-pressure air flow entering the connector to form vortices within the sealed chambers. After passing through multiple sealed chambers, the pressure of the air flow gradually decreases, effectively reducing the pressure and leakage volume, thereby achieving a sealing effect. Additionally, the sealing ring in the second sealing assembly finally seals the sealing gap between the signal line and the connector, greatly reducing the pressure within the sealing gap and achieving zero leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the present invention, some embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. Those skilled in the art should understand that the components or parts denoted by the same reference numeral in different drawings are the same or similar; the drawings of the present invention are not necessarily drawn to scale with each other.

[0021] In the drawings:

[0022] Figure 1 is a schematic structural diagram of the sealing device in some embodiments of the present invention;

[0023] Figure 2 is Figure 1 an exploded view of the structure of the sealing device in;

[0024] Figure 3 is Figure 1 a schematic diagram of the sealing principle of the sealing device in.

[0025] Description of the reference numerals in the drawings:

[0026] 100, sealing device;

[0027] 1, connector; 2, base; 3, first axial fixing ring; 4, seal; 5, fixing member; 6, second axial fixing ring; 7, sealing ring;

[0028] 200, signal line; 300, signal line connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Those skilled in the art should understand that the embodiments described hereinafter are only some embodiments of the present invention, rather than all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should still fall within the protection scope of the present invention.

[0030] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] Next, with reference to Figures 1 to 3 , the structure of the sealing device in some embodiments of the present invention will be described in detail. Among them, Figure 1 is a schematic structural diagram of the sealing device in some embodiments of the present invention; Figure 2 is Figure 1 the exploded view of the structure of the sealing device in Figure 3 is Figure 1 the schematic diagram of the sealing principle of the sealing device in

[0033] Before that, it should be noted that for the convenience of description and to enable those skilled in the art to quickly understand the technical solution of the present invention, only the technical features that are strongly related (directly or indirectly) to the technical problems and / or technical concepts to be solved by the present invention will be described later. For the technical features that are weakly related to the technical problems and / or technical concepts to be solved by the invention, no further description will be given. Since these weakly related technical features are common knowledge in the art, even if the present invention does not describe these weakly related features, it will not result in insufficient disclosure of the present invention.

[0034] As shown in Figure 1 and Figure 2As shown in the figure, the present invention provides a sealing device 100 for a signal line 200, which includes a connecting member 1, a sealing assembly, and a base 2. The connecting member 1 is provided with a "T"-shaped hole allowing the signal line 200 to pass through. The sealing assembly is arranged in the "T"-shaped hole and is used to block the airflow at the sealing gap between the signal line 200 and the sealing tube. The base 2 is provided with a through hole allowing the signal line 200 to pass through, and a part of the base 2 can be embedded into the "T"-shaped hole to tightly press the sealing assembly.

[0035] Specifically, the sealing assembly is arranged at the end with a larger aperture in the "T"-shaped hole, and one end of the sealing assembly abuts against the connecting edge of the large aperture and the small aperture in the "T"-shaped hole. The base 2 abuts against the other end of the sealing assembly to tightly press the sealing assembly against the connecting member 1, avoiding the situation that the sealing assembly detaches from the "T"-shaped hole of the connecting member 1 due to excessive air pressure.

[0036] The sealing assembly includes a first sealing assembly and a second sealing assembly. One or more connected sealing chambers are formed in the first sealing assembly, and the airflow forms a labyrinth seal through one or more sealing chambers to block part of the airflow. As Figure 3 shown, the high-pressure airflow first enters the labyrinth seal and passes through the sealing chambers. Due to the sudden increase in the flow cross-sectional area, the airflow forms a strong vortex, and the vortex almost completely eliminates the velocity and reduces the pressure. After passing through the multi-layer sealing structure, the airflow velocity and pressure also decrease more and more. That is, passing through a sealing structure is equivalent to throttling once, and the effect of multiple throttlings can effectively reduce the pressure and leakage amount, playing a sealing role.

[0037] The second sealing assembly abuts against the first sealing assembly and is used to block all the airflow on the side of the first sealing assembly. After passing through the labyrinth seal, the airflow pressure and leakage amount at the sealing gap between the signal line 200 and the sealing tube are reduced. Then, the final sealing is carried out through the second sealing assembly. Since the pressure inside the connecting member 1 is greatly reduced, the final sealing effect of the second sealing assembly achieves zero leakage.

[0038] The first sealing assembly includes a first axial fixing ring 3 and one or more stages of sealing members 4. The first axial fixing ring 3 abuts against the inner edge of the connecting member 1, and the first axial fixing ring 3 is used to fix the signal line 200. One or more stages of sealing members 4 form one or more sealing chambers, and the opening of each sealing chamber faces the first axial fixing ring 3.

[0039] The first-stage sealing member 4 has one sub-sealing member, and one sub-sealing member and the first axial fixing ring 3 form a sealing chamber. The multi-stage sealing member 4 is composed of multiple sub-sealing members, and adjacent two sub-sealing members form a sealing chamber.

[0040] In some other embodiments of the present invention, the multi-stage seal 4 may be provided as a single unit, formed integrally by injection molding and demolding technology or by turning technology.

[0041] In the present invention, the second seal assembly is provided as the seal ring 7. Since the seal ring 7 will be displaced under the push of the air flow in the "T"-shaped hole, resulting in poor sealing effect; at the same time, due to the different sizes of the connection parts of the signal lines 200 for different compressor models, in order to avoid the problem of increasing the overall manufacturing cost of the sealing device 100 by equipping different sizes of seal rings 7 for different types of compressors, a seal ring fixing member for installing the seal ring 7 is additionally provided in the present invention, which can not only fix the installation position of the seal ring 7, but also be adapted to different models of compressors. Specifically, the second seal assembly includes a seal ring 7 and a seal ring fixing member. The seal ring fixing member has a seal ring installation groove, and the seal ring 7 is arranged in the seal ring installation groove for blocking the air flow on the side of the one-stage or multi-stage seal 4.

[0042] The seal ring fixing member includes a fixing member 5 and a second axial fixing ring 6. The fixing member 5 abuts against the one-stage or multi-stage seal 4. A seal ring installation groove is formed between the fixing member 5 and the second axial fixing ring 6, and the seal ring 7 is arranged in the seal ring installation groove. The end of the base 2 abuts against the second axial fixing ring 6.

[0043] To improve the installation efficiency of the seal assembly, in the present invention, any one or more of the first axial fixing ring 3, the one-stage or multi-stage seal 4, the fixing member 5, and the second axial fixing ring 6 are set as a symmetric mid-division structure. That is, when installing the seal assembly, after installing one half of the symmetric mid-division of any component in the seal assembly, then install the other half of the component to improve the installation efficiency.

[0044] In the present invention, the material of the seal assembly can be set to any feasible material, that is, those skilled in the art can set any one or more of the first axial fixing ring 3, the one-stage or multi-stage seal 4, the fixing member 5, and the second axial fixing ring 6 to be made of metal, alloy, and polymer materials. Preferably, in order to reduce the manufacturing cost of the seal assembly, in the present invention, the materials of the first axial fixing ring 3, the one-stage or multi-stage seal 4, the fixing member 5, and the second axial fixing ring 6 are all set to aluminum material.

[0045] In some other embodiments of the present invention, a compressor is provided, including the sealing device 100 of the signal line 200 described in any one of the above. The compressor includes a signal line 200 and a signal line interface 300. By installing the signal line 200 and the sealing device 100 at the signal line interface 300, the air flow in the compressor is prevented from leaking through the signal line interface 300.

[0046] Since the signal connection interfaces of compressors of different models have different sizes, in the present invention, the outer surfaces of the connecting member 1 and the base 2 are both configured as threaded structures that match the interface of the compressor signal line 200. Specifically, the sizes of the outer surfaces of the connecting member 1 and the base 2 can be set according to actual situations and will not be elaborated here.

[0047] Those skilled in the art can understand that in the present invention, the signal line 200 is passed through the "T"-shaped hole, and the sealing assembly is installed in the connecting member 1, so that one end of the sealing assembly abuts against the edge of the "T"-shaped hole, and the other end of the sealing assembly is tightened against the connecting member 1 through the base 2 to seal the interface of the signal line 200 inside the compressor. By adding the sealing device 100 at the compressor signal line interface 300, the present invention effectively improves the sealing effect of the signal line 200 and avoids the problem of air leakage from the signal line 200 inside the compressor.

[0048] Furthermore, a labyrinth seal is formed by forming multiple sealing chambers in the first sealing assembly to form vortices of the high-pressure air flow entering the connecting member 1 in the sealing chambers. After passing through multiple sealing chambers, the pressure of the air flow gradually decreases, effectively reducing the pressure and the air leakage amount, and playing a sealing role. Then, the sealing ring 7 in the second sealing assembly finally seals the sealing gap between the signal line 200 and the connecting member 1, so that the pressure in the sealing gap is greatly reduced, achieving zero leakage.

[0049] So far, the technical solutions of the present invention have been described in combination with multiple foregoing embodiments. However, those skilled in the art can easily understand that the protection scope of the present invention is not limited to these specific embodiments. Without departing from the technical principle of the present invention, those skilled in the art can split and combine the technical solutions in the above-mentioned various embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principle of the present invention will fall within the protection scope of the present invention.

Claims

1. A sealing device for a signal line, characterized in that: include: A connector, which is provided with a "T"-shaped hole allowing the signal line to pass through; A sealing assembly, which is arranged in the "T"-shaped hole and is used to block the airflow at the sealing gap between the signal line and the sealing tube; The base is provided with a through hole allowing the signal line to pass through, and a portion of the base can be embedded in the "T"-shaped hole to tighten the sealing component.

2. The signal line sealing device according to claim 1, characterized in that: The sealing assembly comprises: A first sealing component, wherein one or more communicating sealing chambers are formed therein, and airflow passes through the one or more sealing chambers to form a labyrinth seal to block part of the airflow; The second sealing component is tightly pressed against the first sealing component and is used to block all airflow on the side of the first sealing component.

3. The signal line sealing device according to claim 2, characterized in that: The first sealing assembly includes a first axial fixing ring and one or more sealing members, wherein the first axial fixing ring abuts against the edge inside the connector, and is used to fix the signal line; the one or more sealing members form one or more sealing chambers, and the opening of each sealing chamber faces the first axial fixing ring.

4. The signal line sealing device according to claim 3, characterized in that: The second sealing assembly includes a sealing ring and a sealing ring fixing member, the sealing ring fixing member has a sealing ring installation groove, the sealing ring is arranged in the sealing ring installation groove, and is used to block the airflow on one or more stages of the sealing member side.

5. The signal line sealing device according to claim 4, characterized in that: The sealing ring fixing member includes a fixing member and a second axial fixing ring, and the fixing member is tightly pressed against one or more stages of the sealing members; A sealing ring installation groove is formed between the fixing member and the second axial fixing ring, and the sealing ring is arranged in the sealing ring installation groove; the end of the base is tightly pressed against the second axial fixing ring.

6. The signal line sealing device according to claim 3, characterized in that: The first-level seal has a sub-seal, and the sub-seal and the first axial fixing ring form a seal chamber; The multi-stage seal is composed of a plurality of sub-seals, and two adjacent sub-seals form a sealed chamber.

7. The signal line sealing device according to claim 5, characterized in that: Any one or more of the first axial fixing ring, the first or multi-stage sealing element, the fixing element and the second axial fixing ring are arranged as a symmetrical center-split structure.

8. A compressor, characterized in that: A signal line sealing device comprising the signal line sealing device according to any one of claims 1 to 7.

9. A compressor according to claim 8, characterized in that: The outer sides of the connecting piece and the base are both configured as threaded structures that cooperate with the compressor signal line interface.

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