Mounting groove of sealing structure and scroll compressor with mounting groove

Abstract

The utility model discloses a mounting groove for mounting a sealing structure and a scroll compressor with the mounting groove, the mounting groove is arranged outside a static scroll plate of the scroll compressor, the mounting groove has a certain width and is used for mounting the sealing structure, and the sealing structure comprises at least a first sealing element and a second sealing element, the first sealing piece and the second sealing piece are arranged in the first direction, and the top face of the first sealing piece and the top face of the second sealing piece are used for making contact with the first contact face to form sealing of the first end. The first sealing element and the second sealing element are provided with a first interval space; the sealing air cavity is all or part of the first interval space; particularly, when the sealing structure is mounted in a mounting groove outside a disc of the scroll compressor, the sealing effect of the scroll compressor is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a mounting groove for installing a sealing structure and a scroll compressor having the same. Background Technology

[0002] Currently, compressors are the core equipment of modern industrial pneumatic systems, acting as driven fluid machinery that elevates low-pressure gas to high-pressure gas. Scroll air compressors are a type of compressor that does not have a reciprocating mechanism; they primarily rely on a scroll to compress air. They are widely used due to their simple structure, small size, light weight, and ease of automation.

[0003] However, this type of scroll compressor still has the following drawbacks when used for compressing gases:

[0004] A scroll compressor uses the rotation of a drive shaft to drive a moving scroll plate, thereby increasing low-pressure gas to high-pressure gas. However, during the operation of a scroll compressor, the repeated rotation and friction between the end face of the moving scroll plate and the sealing strip can cause the following problems: Under prolonged operation, the sealing structure may shift; prolonged friction can cause wear on the top of the sealing strip, allowing outside gas to leak into the scroll compressor; high-frequency rotation generates vibration, reducing the sealing performance of the sealing structure and shortening the compressor's lifespan. As a result, the sealing effect of the scroll compressor is significantly reduced. This is especially true when compressing high-purity gases, as the reduced sealing effect can contaminate the high-purity gas. Utility Model Content

[0005] In response to at least one defect or improvement requirement of the prior art, this utility model provides a scroll compressor sealing structure to improve the sealing performance of the scroll compressor.

[0006] To achieve the above objectives, this utility model provides a mounting groove for a sealing structure, wherein the mounting groove is disposed outside the stationary scroll plate of a scroll compressor.

[0007] The sealing structure includes:

[0008] At least a first seal and a second seal, the first seal and the second seal are arranged in a first direction, and the top surface of the first seal and the top surface of the second seal are used to contact the first contact surface to form a seal on the top surface of the first seal and the second seal;

[0009] The first seal and the second seal have a first gap space;

[0010] The sealed air cavity is all or part of the first interval space;

[0011] The mounting groove is one or more, and the mounting groove has a certain width for installing and accommodating the sealing structure.

[0012] Wherein, the first direction is the direction in which gas flows in or out of the air gap generated by the relative movement between the top surface of the first seal and the first contact surface;

[0013] The mounting groove is provided with a vent hole, which is located between the first sealing element and the second sealing element, at the middle position of the bottom of the mounting groove.

[0014] Furthermore,

[0015] The mounting groove is equipped with a limiting element for fixing the sealing element.

[0016] Furthermore,

[0017] A sealing element is provided between the limiting elements or between the limiting element and one side of the mounting groove.

[0018] Furthermore,

[0019] The limiting member has a certain height in the direction of the mounting groove depth, with the minimum height being one-quarter of the mounting groove depth.

[0020] Furthermore,

[0021] The aforementioned vent hole is provided through the limiting component.

[0022] Furthermore,

[0023] The aforementioned limiting component is intermittently configured, with the vent located at the point where the limiting component is interrupted.

[0024] Furthermore,

[0025] The vent is used to supply gas into the interior of the scroll compressor.

[0026] This utility model also discloses a scroll compressor with a mounting groove. The scroll compressor includes a stationary scroll plate and a moving scroll plate. The mounting groove is disposed outside the stationary scroll plate, and a sealing structure is provided in the mounting groove of the stationary scroll plate. The mounting groove is the aforementioned mounting groove for installing the sealing structure. Compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0027] (1) The present invention provides at least one mounting slot, in which different sealing structures can be installed. The sealing gas cavity forms a buffer gas exchange space, which improves the sealing effect of the scroll compressor.

[0028] (2) The limiting component provided by this utility model can fix the sealing structure and prevent the sealing structure from shifting when the scroll compressor is working, so as to improve the sealing performance.

[0029] (3) By using the ventilation hole provided by this utility model, the air pressure inside the sealed air chamber can be kept stable and higher than the external air pressure. The air pressure inside the sealed air chamber is greater than the atmospheric pressure outside the scroll plate. External gas cannot leak into the sealed air chamber with higher air pressure, and thus external gas cannot pass through the sealed air chamber and enter the scroll compressor. This can further improve the sealing effect of the sealing structure. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A top view of a single mounting slot provided in an embodiment of the present invention, arranged on a stationary vortex disk;

[0032] Figure 2 A plurality of mounting slots provided for embodiments of the present invention are arranged in a top view of a stationary vortex disk;

[0033] Figure 3 A cross-sectional view showing the limiting component fixedly installed on the stationary vortex disk, with sealing elements on both sides of the limiting component;

[0034] Figure 4 A cross-sectional view of the limiting component being fixedly installed on the stationary vortex disk, with sealed structures on both sides of the limiting component;

[0035] Figure 5 A top view of a closed-loop limiting member provided in an embodiment of this utility model;

[0036] Figure 6 A top view of a segmented limiting member provided in an embodiment of this utility model;

[0037] Figure 7 A cross-sectional view of a device with a vent provided for an embodiment of this utility model;

[0038] Figure 8 A cross-sectional view of a vent through-hole limiting member provided in an embodiment of this utility model;

[0039] Figure 9 A cross-sectional view of a ventilation hole provided in an embodiment of this utility model, showing the ventilation hole located on an indeterminate part. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are only possible technical implementations of the present utility model and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of the present utility model without creative effort, and these embodiments are also within the protection scope of the present utility model.

[0043] In existing scroll compressor sealing structures, the sealing structure is located outside the stationary or moving scroll disc. The area outside the disc is the outer periphery of the meshing area between the rotating coil on the moving scroll disc and the fixed coil on the stationary scroll disc. A single sealing strip placed within a sealing groove is commonly used for sealing and dust prevention. However, during operation, the moving scroll disc moves relative to the stationary scroll disc, and the internal temperature of the entire compressor body exceeds 150 degrees Celsius. This high temperature causes deformation of the sealing strip, and prolonged friction leads to displacement and wear. When using a single sealing groove and a single sealing strip, deformation and wear easily allow external gas to leak into the scroll compressor, reducing the sealing effect. This is especially problematic when scroll compressors are used for compressing high-purity gases; leaks can contaminate the high-purity gas, ultimately reducing the purity of the final product gas.

[0044] In the first embodiment of this utility model, there is one mounting groove with a certain width in the first direction, which can be used to install a sealing structure. The sealing structure includes at least a first sealing element and a second sealing element, which are arranged in the first direction. The top surfaces of the first and second sealing elements are used to contact the first contact surface to form a seal at the first end. The first and second sealing elements have a first gap space. The sealing air cavity is all or part of the first gap space. For example, as shown in Figure 1, when the first direction is the radial direction of the stationary vortex disk, the planar shape of the mounting groove can be set to be circular.

[0045] In the second embodiment of this utility model, there are at least two mounting slots, with a certain interval between them. The mounting slots have a certain width in the first direction and can be used to install the sealing structure in Embodiment 1. For example, as shown in Figure 2, when the first direction is the radial direction of the stationary vortex disk, the shaded area is the mounting slot, and the planar shape of the mounting slot can be set to be circular.

[0046] It is worth noting that the shape of the mounting groove does not necessarily have to be a regular rectangle. For example, it can be a trapezoid or a shape with a semi-circular base at the bottom, which is used to fit the base of the sealing structure in a specific shape. In this way, a sealed air cavity is formed in the above-mentioned shape structure.

[0047] Similarly, the multiple seals used in this invention will experience some displacement during operation, thus affecting the sealing effect of the sealing structure. Therefore, to solve the above problem, in the third embodiment of this invention, a limiting member can be added to the sealing structure in embodiments one and two to further fix the seals and prevent them from shifting during the operation of the scroll compressor. The limiting member can not only be used to separate the individual seals to form a sealing cavity, but also to fix the seals.

[0048] When the seal is placed in the mounting groove and the stationary and moving scrolls are closed, the moving scroll compresses the seal, causing it to deform and fully fill the gaps in the mounting groove. The sides and bottom are tightly fitted to the mounting groove, and the top is tightly fitted to the end face of the moving scroll. Generally, external gas cannot leak inward through the contact points between the seal and the stationary and moving scrolls, and the seal is difficult to move when it is tightly fitted. At this point, the friction between the seal, the mounting groove, and the limiting component increases, effectively reducing the amount of seal displacement and fixing the seal. Simultaneously, because there are no gaps between the seal and the mounting groove and limiting component, external gas cannot enter the interior of the scroll, thus providing a good sealing and dustproof effect.

[0049] Taking the sealing structure of Embodiment 1 as an example, from the cross-section of the mounting groove, as shown... Figure 3 As shown, this is the case where a limiting member is provided in the first embodiment of this utility model. The limiting member is an additionally installed component, disposed between the two sealing members. Similarly, the limiting member can also be a protruding structure on the bottom surface of the stationary scroll plate, that is, the limiting member and the stationary scroll plate are integrated. Figure 4 As shown, the limiting component has a sealed structure on both sides, and the limiting component is integrated with the stationary vortex disk.

[0050] Taking the sealing structure of Embodiment 1 as an example, from the top view of the mounting groove, the limiting member can be a closed loop type with the ends connected, such as... Figure 5 The shaded area shown is a limiting component, which can also be segmented, such as... Figure 6The shaded area shown is the limiting component. The segmented type is a closed-loop limiting component with a break in the middle. One segment is a limiting component area and the other segment is an unlimited component area. The number of limiting components is not limited, as long as they play a good fixing role.

[0051] In the fourth embodiment of this utility model, to achieve a better sealing effect, a vent hole can be provided at the bottom of the mounting groove, and an air inlet is provided at the bottom of the vent hole for easy ventilation. For example... Figure 7 As shown, a vent hole is provided at the bottom of the mounting groove between the two seals in Embodiment 1. When the moving scroll plate and the stationary scroll plate are closed, the end face of the moving scroll plate is in close contact with the top of the sealing strip, and a sealing air cavity can be formed on the side of the sealing strip, the bottom of the sealing groove, and the end face of the moving scroll plate. When air is introduced into the sealing air cavity through the vent hole, a micro-pressure air chamber is formed inside the sealing air cavity. The micro-pressure gas squeezes the outermost and innermost sealing strips against the outer and inner walls of the sealing groove, making the outer and inner walls of the sealing groove and the sealing strip tightly fitted without gaps. The moving scroll plate squeezes the sealing strip downwards, making the bottom of the sealing strip tightly fitted without gaps with the sealing groove. Because the sealing structure of this utility model has a tight fit between the sealing strip and the sealing groove without gaps, external gas cannot enter the inside of the scroll compressor through the sealing structure, and the gas inside the scroll compressor cannot leak outwards.

[0052] Simultaneously, the sealing structure maintains a pressure greater than the external atmospheric pressure, preventing external atmospheric pressure from flowing into the sealed air chamber even when the first sealing strip fails to provide a good seal. The sealing structure proposed in this embodiment can form a micro-pressure sealed air chamber during the operation of the scroll compressor, thereby overcoming the leakage problem caused by friction and deformation of a single sealing strip in the prior art, and improving the sealing effect of the scroll compressor.

[0053] When the limiting component of this embodiment is used in this utility model, the vent holes are configured as follows for different limiting components:

[0054] When the above-mentioned closed-loop limiting component is used, the vent extends upward, penetrates the limiting component, and directly connects to the sealed air cavity. The diameter of the vent can be larger or smaller than the width of the limiting component. Figure 8 As shown, the diameter of the vent hole is smaller than the width of the limiting component.

[0055] When the above-mentioned segmented intermediate partition is used, if the top of the vent hole is the intermediate partition area, the vent hole extends upwards, passes through the limiting member, and directly connects to the sealed air chamber. The hole diameter can be larger or smaller than the width of the limiting member, as shown in Figure 8. If the top of the vent hole is without an intermediate partition area, the vent hole directly connects to the sealed air chamber. The hole diameter of the vent hole can be set according to requirements, such as... Figure 9 .

[0056] The sealing structure in Embodiments 1, 2, and 3 of this utility model may also include at least two sealing elements, with a plurality of sealing elements arranged in a first direction; each sealing element has a top surface and a bottom surface, the width of the first top surface in the first direction being less than the width of the first bottom surface in the first direction; the two sealing elements are directly or indirectly abutted together to form a first gap space; the first air gap cavity is all or part of the first gap space.

[0057] It should be noted that those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this utility model.

[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0059] The above are merely exemplary embodiments of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This invention is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0061] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mounting groove for a sealing structure, characterized in that, The mounting slot is located outside the stationary scroll plate of the scroll compressor. The sealing structure includes: At least a first seal and a second seal, the first seal and the second seal are arranged in a first direction, and the top surface of the first seal and the top surface of the second seal are used to contact the first contact surface to form a seal on the top surface of the first seal and the second seal; The first seal and the second seal have a first gap space; The sealed air cavity is all or part of the first interval space; The mounting groove is one or more, and the mounting groove is used to install and accommodate the sealing structure; Wherein, the first direction is the direction in which gas flows in or out of the air gap generated by the relative movement between the top surface of the first seal and the first contact surface; The mounting groove is provided with a vent hole, which is located between the first sealing element and the second sealing element, at the middle position of the bottom of the mounting groove.

2. The mounting groove of the sealing structure as described in claim 1, characterized in that, The mounting groove is provided with a limiting element for fixing the first seal and the second seal.

3. The mounting groove of the sealing structure as described in claim 2, characterized in that, The first sealing element or the second sealing element is disposed between the limiting elements or between the limiting elements and one side of the mounting groove.

4. The mounting groove of the sealing structure as described in claim 2, characterized in that, The limiting member has a certain height in the direction of the mounting groove depth, with the minimum height being one-quarter of the mounting groove depth.

5. The mounting groove of the sealing structure as described in claim 1, characterized in that, The aforementioned vent hole is provided through the limiting component.

6. The mounting groove of the sealing structure as described in claim 3, 4, or 5, characterized in that, The aforementioned limiting component is intermittently configured, with the vent located at the point where the limiting component is interrupted.

7. The mounting groove of the sealing structure as described in claim 1, 3, 4, or 5, characterized in that, The vent is used to supply gas into the interior of the scroll compressor.

8. A scroll compressor, comprising a stationary scroll and a moving scroll, characterized in that: The mounting groove is the mounting groove for mounting a sealing structure as described in any one of claims 1-7.

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