Mounting groove of sealing structure and scroll compressor with mounting groove

Abstract

The invention discloses a mounting groove of 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. A first interval space is formed between the first sealing part and the second sealing part; the sealing air cavity is all or part of the first interval space; particularly, when the sealing structure is mounted in a disc outer mounting groove of the scroll compressor, the sealing effect of the scroll compressor is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to an installation groove of a sealing structure, a sealing structure and a scroll compressor having the same. Background Art

[0002] At present, the compressor is the core equipment of modern industrial pneumatic system, which is a driven fluid machine that boosts low-pressure gas to high-pressure gas. The scroll air compressor is a kind of machine without reciprocating motion mechanism, which mainly relies on scroll to compress air. It has simple structure, small size, light weight and easy to realize automation, so it is widely used.

[0003] However, this scroll compressor still has the following defects when used for compressing gas:

[0004] The scroll compressor drives the movable scroll by the rotation of the transmission shaft, thereby raising the low-pressure gas to high-pressure gas. However, during the operation of the scroll compressor, due to repeated rotation, the end face of the movable scroll and the repeated friction between the sealing strip will cause the following problems: the sealing structure will be displaced under long-term working conditions; long-term friction will cause wear on the top of the sealing strip, and external gas will leak into the scroll compressor; high-frequency rotation will cause vibration, thereby reducing the sealing of the sealing structure and the service life of the body. In this way, the sealing effect of the scroll compressor will be greatly reduced. Especially when compressing high-purity gas, the high-purity gas will be contaminated due to the reduced sealing effect. Summary of the invention

[0005] In view of at least one defect or improvement demand in the prior art, the present invention provides a scroll compressor sealing structure to improve the sealing performance of the scroll compressor.

[0006] To achieve the above object, the present invention provides a mounting groove of a sealing structure, wherein the mounting groove is arranged outside a fixed scroll disk of a scroll compressor.

[0007] The sealing structure comprises:

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

[0009] The first sealing member and the second sealing member have a first separation space;

[0010] A sealed air cavity, which is all or part of the first spacing space;

[0011] There is at least one mounting groove, and the mounting groove has a certain width, and is used to mount the sealing structure; thus, the first side surface of the mounting groove is mounted on the first side surface of the first sealing member, the second side surface of the mounting groove is mounted on the second side surface of the second sealing member, and the bottom surface of the mounting groove is mounted on the bottom surface of the sealing structure;

[0012] or,

[0013] The sealing structure comprises:

[0014] at least one seal;

[0015] The sealing member has a top surface and a bottom surface;

[0016] There are a plurality of installation grooves, each of which corresponds to a sealing member installed therein, and the top surface of the sealing member is used to directly contact the first contact surface to form a seal at the first end, thereby forming a first spacing space between the two sealing members;

[0017] In this way, the first side surface of the mounting groove is attached to the first side surface of the sealing member, the second side surface of the mounting groove is attached to the second side surface of the sealing member, and the bottom surface of the mounting groove is attached to the bottom surface of the sealing member;

[0018] A sealed air cavity, which is all or part of the first spacing space;

[0019] The first direction is a direction in which gas flows in or out of an air gap generated by relative movement between the first end and the first contact surface.

[0020] Further,

[0021] The bottom surface of the mounting groove is a non-planar structure that is convex or concave toward the first contact surface.

[0022] Further,

[0023] The bottom surface of the installation groove is provided with a limiting member, and a sealing structure or a sealing member is provided between the limiting members or between the limiting member and a side surface of the installation groove to achieve a fixing effect.

[0024] Further,

[0025] The side surface of the installation groove is a non-vertical plane, and is not at a 90-degree angle with the first contact surface, corresponding to the side surface of the sealing structure or the sealing element, which is not at a 90-degree angle.

[0026] Further,

[0027] The limiting member has a certain height in the depth direction of the installation groove, and the minimum height is one quarter of the depth of the installation groove.

[0028] Further,

[0029] The installation groove is provided with a ventilation hole, and the ventilation hole is located in the middle position of the sealing member installed in the installation groove.

[0030] Further,

[0031] The ventilation hole is arranged through the limiting member.

[0032] Further,

[0033] The limiting member is disposed intermittently, and the ventilation holes are located at the intermittent positions of the limiting member.

[0034] Further,

[0035] The ventilation holes allow the gas inside the scroll compressor to enter.

[0036] The present invention also discloses a scroll compressor, which includes a fixed scroll and a movable scroll. A mounting groove is arranged outside the fixed scroll. A sealing structure is arranged in the mounting groove of the fixed scroll. The mounting groove is like the mounting groove of the sealing structure mentioned above.

[0037] Further,

[0038] The bottom surface of the mounting groove corresponds to the bottom surface of the sealing structure or the bottom surface of the sealing element, and is a semi-spherical surface or an H-shaped surface.

[0039] Compared with the prior art, the above technical solution conceived by the present invention can achieve the following beneficial effects:

[0040] (1) The present invention provides at least one mounting groove in which different sealing structures can be installed. The sealed air cavity forms an exchange space for buffering gas, thereby improving the sealing effect of the scroll compressor.

[0041] (2) The limiting member provided by the present invention can fix the sealing structure and prevent the sealing structure from being displaced when the scroll compressor is working, thereby improving the sealing performance.

[0042] (3) By using the ventilation holes provided in the present invention, the air pressure in the sealed air cavity can be maintained at a stable pressure higher than the external air pressure. The air pressure in the sealed air cavity is greater than the atmospheric pressure outside the scroll disk. External gas cannot leak into the sealed cavity with a higher air pressure, and external gas cannot pass through the sealed air cavity and enter the interior of the scroll compressor. This can further improve the sealing effect of the sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A top view of a single mounting groove provided in an embodiment of the present invention provided on a fixed scroll plate;

[0045] Figure 2 A top view of a plurality of mounting grooves provided in an embodiment of the present invention provided on a fixed scroll plate;

[0046] Figure 3 This is a cross-sectional view of a position limiting member fixedly mounted on a fixed scroll plate, with sealing members on both sides of the position limiting member;

[0047] Figure 4 This is a cross-sectional view of a position limiting member fixedly mounted on a stationary scroll plate, with sealing structures on both sides of the position limiting member;

[0048] Figure 5 A top view of a closed-loop position limiting member provided in an embodiment of the present invention;

[0049] Figure 6 A top view of a segmented position limiting member provided in an embodiment of the present invention;

[0050] Figure 7 A cross-sectional view of a device provided with ventilation holes according to an embodiment of the present invention;

[0051] Figure 8 A cross-sectional view of a vent hole penetrating a stopper provided in an embodiment of the present invention;

[0052] Fig. 9 A cross-sectional view of a ventilation hole provided in an unlimited position member according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] The terms "first", "second", "third", etc. in the specification and claims of the present invention and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0056] In the sealing structure of the scroll compressor of the prior art, the sealing structure is located outside the fixed scroll or the movable scroll, and the outside of the disk is the periphery of the meshing area of ​​the rotating roll on the movable scroll of the scroll compressor and the fixed roll on the fixed scroll. Most of them use a single sealing strip placed in the sealing groove to achieve a sealing and dustproof effect. However, when the scroll compressor is working, the movable scroll moves relative to the fixed scroll, and the internal temperature of the entire compressor body is above 150 degrees Celsius. The high temperature will cause the sealing strip and the sealing strip to deform, and the long-term friction movement will cause the sealing strip to shift and wear. When a single sealing groove and a single sealing strip are used, once deformation and wear occur, the external gas will easily leak into the interior of the scroll compressor, and the sealing effect will be reduced. In particular, when the scroll compressor is used for the compression of high-purity gas, once leakage occurs, the high-purity gas will be contaminated and the purity of the final product gas will be reduced.

[0057] In the first embodiment of the present invention, there is one mounting groove, which has a certain width in the first direction and can be used to install a sealing structure. The sealing structure at least includes a first seal and a second seal, the first seal and the second seal are arranged in the first direction, and the top surface of the first seal and the top surface of the second seal are used to contact with the first contact surface to form a seal at the first end; the first sealing part and the second sealing part have a first spacing space; the sealed air cavity is all or part of the first spacing space; for example, as shown in Figure 1, when the first direction is the radial direction of the fixed scroll disk, the plane shape of the mounting groove can be set to a circle.

[0058] In the second embodiment of the present invention, there are at least two mounting grooves, there is a certain interval between the two mounting grooves, and the mounting groove has a certain width in the first direction, which can be used to install the sealing structure in the first embodiment. For example, as shown in FIG2, when the first direction is the radial direction of the fixed scroll, the shaded part is the mounting groove, and the plane shape of the mounting groove can be set to be circular.

[0059] Similarly, the multiple seals used in the present invention will undergo a certain displacement during operation, thereby affecting the sealing effect of the sealing structure. Therefore, in order to solve the above problem, further, in the third embodiment of the present invention, a stopper can be added to the sealing structure in the first and second embodiments of the present invention to further fix the seal and prevent the seal from being displaced during operation of the scroll compressor. The stopper can be used not only to separate the seals to form a sealed cavity, but also to fix the seals.

[0060] When the seal is placed in the installation groove and the fixed scroll and the movable scroll are covered, the movable scroll squeezes the seal, the seal is deformed, and the seal fully fills the gap in the installation groove. The two sides and the bottom are tightly fitted with the installation groove, and the top is tightly fitted with the end face of the movable scroll. Generally speaking, the outside gas cannot leak inward through the contact part between the seal and the fixed scroll and the movable scroll. The seal is tightly fitted when it is difficult to move. At this time, the friction between the seal and the installation groove and the limiter increases, which can effectively reduce the displacement of the seal and play the role of fixing the seal. At the same time, because the seal and the installation groove and the limiter are tightly fitted without gaps, the outside gas cannot enter the interior of the scroll, which can also play a good sealing and dustproof effect.

[0061] Taking the sealing structure of the first embodiment as an example, from the cross section of the mounting groove, as shown in FIG. Figure 3 As shown in the figure, the first embodiment of the present invention is provided with a stopper, which is an additionally installed component and is arranged between two sealing members. Similarly, the stopper can also be a raised structure on the bottom surface of the fixed scroll, that is, the stopper and the fixed scroll are integrated. Figure 4 As shown, there are sealing structures on both sides of the limit member, and the limit member and the fixed scroll plate are integrated.

[0062] Taking the sealing structure of the first embodiment as an example, from the top view of the installation groove, the limiter can be a closed loop type connected end to end, such as Figure 5 The shaded part shown is a limiter, which can also be a segmented type such as Figure 6 The shaded part shown is a limiter. The segmented type is a closed-loop limiter that is disconnected in the middle. One segment is a limiter area and the other segment is an unlimited limiter area. The number of limiters is not limited as long as they play a good fixing role.

[0063] In the fourth embodiment of the present invention, in order to make the sealing structure have a better sealing effect, a ventilation hole can be set at the bottom of the installation groove, and at the same time, for the convenience of ventilation, an air connection interface is set at the bottom of the ventilation hole. Figure 7As shown, a ventilation hole is provided between the two seals of the first embodiment and at the bottom of the mounting groove. When the movable scroll and the fixed scroll are covered, the end face of the movable scroll is close to the top of the sealing strip, and the side of the sealing strip, the bottom of the sealing groove, and the end face of the movable scroll can form a sealed air cavity. When air is ventilated into the sealed air cavity through the ventilation sealing hole, a micro-pressure air chamber is formed in the sealed air cavity. The micro-pressure gas squeezes the outermost sealing strip and the innermost sealing strip toward the outer wall and the inner wall of the sealing groove, so that the outer wall and the inner wall of the sealing groove and the sealing strip fit tightly without a gap. The movable scroll squeezes the sealing strip downward, so that the bottom of the sealing strip fits tightly with the sealing groove without a gap. The sealing structure described in the present invention, because the sealing strip and the sealing groove fit tightly without a gap, prevents external gas from entering the scroll compressor through the sealing structure, and the gas inside the scroll compressor cannot leak out.

[0064] At the same time, there is an air pressure greater than the external atmospheric pressure between the sealing structures, and even when the first sealing strip cannot achieve a good sealing effect, the external atmospheric pressure cannot flow into the sealed air cavity. The sealing structure proposed in this embodiment can form a micro-pressure sealed air cavity when the scroll compressor is working, 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.

[0065] When the present invention adopts the stopper of this embodiment, the ventilation holes are arranged as follows for different stoppers:

[0066] When the above-mentioned closed-loop stopper is used, the vent hole extends upward, passes through the stopper and directly connects to the sealed air cavity. The hole diameter can be larger than the stopper width or smaller than the stopper width. Figure 8 As shown, the diameter of the ventilation hole is smaller than the width of the limiting member.

[0067] When the above-mentioned segmented middle partition is used, when the top of the ventilation air cavity hole is the middle partition area, the ventilation air hole extends upward, passes through the limiter and directly connects to the sealed air cavity. The hole diameter can be larger than the limiter width or smaller than the limiter width. Figure 8 When the top of the ventilation cavity hole is without a middle partition area, the ventilation hole is directly connected to the sealed cavity. The aperture of the ventilation hole can be set according to the requirements, such as Fig. 9 .

[0068] The sealing structure in Embodiment 1, Embodiment 2 and Embodiment 3 of the present invention may also include at least two sealing members, wherein the plurality of sealing members are arranged in the first direction; the sealing member has a top surface and a bottom surface, and the width of the first top surface in the first direction is smaller than the width of the first bottom surface in the first direction; the two sealing members are directly or indirectly abutted to form a first spacing space; the first air gap cavity is all or part of the first spacing space.

[0069] It should be noted that, for the aforementioned method embodiments, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for the present invention.

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. The present invention is intended to cover any variation, use or adaptive change of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0072] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0073] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mounting groove of a sealing structure, characterized in that: The mounting groove is arranged outside the fixed scroll plate of the scroll compressor. The sealing structure comprises: At least a first sealing member and a second sealing member, wherein the first sealing member and the second sealing member are arranged in a first direction, and the top surface of the first sealing member and the top surface of the second sealing member are used to directly contact the first contact surface to form a seal of the first end; The first sealing member and the second sealing member have a first separation space; A sealed air cavity, which is all or part of the first spacing space; There is at least one mounting groove, and the mounting groove has a certain width, and is used to mount the sealing structure; thus, the first side surface of the mounting groove is mounted on the first side surface of the first sealing member, the second side surface of the mounting groove is mounted on the second side surface of the second sealing member, and the bottom surface of the mounting groove is mounted on the bottom surface of the sealing structure; or, The sealing structure comprises: at least one seal; The sealing member has a top surface and a bottom surface; There are a plurality of installation grooves, each of which corresponds to a sealing member installed therein, and the top surface of the sealing member is used to directly contact the first contact surface to form a seal at the first end, thereby forming a first spacing space between the two sealing members; In this way, the first side surface of the mounting groove is attached to the first side surface of the sealing member, the second side surface of the mounting groove is attached to the second side surface of the sealing member, and the bottom surface of the mounting groove is attached to the bottom surface of the sealing member; A sealed air cavity, which is all or part of the first spacing space; The first direction is a direction in which gas flows in or out of an air gap generated by relative movement between the first end and the first contact surface.

2. The mounting groove of the sealing structure according to claim 1, characterized in that: The bottom surface of the mounting groove is a non-planar structure that is convex or concave toward the first contact surface.

3. The mounting groove of the sealing structure as claimed in claim 1 or 2, characterized in that: The bottom surface of the installation groove is provided with a limiting member, and a sealing structure or a sealing member is provided between the limiting members or between the limiting member and a side surface of the installation groove to achieve a fixing effect.

4. The mounting groove of the sealing structure according to claim 2, characterized in that: The side surface of the mounting groove is a non-vertical plane, and is not at a 90-degree angle with the first contact surface, corresponding to the side surface of the sealing structure or the sealing element, which is not at a 90-degree angle.

5. The mounting groove of the sealing structure according to claim 3, characterized in that: The limiting member has a certain height in the depth direction of the installation groove, and the minimum height is one quarter of the depth of the installation groove.

6. The mounting groove of the sealing structure according to claim 1, characterized in that: The installation groove is provided with a ventilation hole, and the ventilation hole is located in the middle position of the sealing member installed in the installation groove.

7. The installation groove of the sealing structure according to claim 3, 4 or 5, characterized in that: The ventilation hole is arranged through the limiting member.

8. The installation groove of the sealing structure according to claim 3, 4 or 5, characterized in that: The limiting member is disposed intermittently, and the ventilation holes are located at the intermittent positions of the limiting member.

9. The installation groove of the sealing structure according to claim 3, 4 or 5, characterized in that: The ventilation holes allow the gas inside the scroll compressor to enter.

10. A scroll compressor, comprising a fixed scroll and a movable scroll, wherein the mounting groove is arranged outside the fixed scroll, and wherein: A sealing structure is provided in the mounting groove of the fixed scroll plate, and the mounting groove is the mounting groove of the sealing structure as described in any one of claims 1-9.

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