Sealing structure and scroll compressor with same

Abstract

The utility model discloses a sealing structure which comprises at least a first sealing part and a second sealing part which are arranged in the first direction, and the first end of the first sealing part and the first end of the second sealing part are used for being in contact with a 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; wherein the first direction is the 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. According to the scroll compressor, firstly, the sealing structure is provided, a certain air cavity structure is arranged in the sealing structure, and especially when the sealing structure is installed in the area outside the disc of the scroll compressor, the sealing effect of the scroll compressor is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor technical field, concretely relates to a sealing structure and scroll compressor with it. BACKGROUND

[0002] Scroll compressor is a kind of gas compressor without reciprocating mechanism, mainly rely on the scroll line between dynamic scroll plate (hereinafter referred to as dynamic plate) and static scroll plate (hereinafter referred to as static plate) to the gas to be processed by compression to obtain high pressure gas. Scroll compressor needs to realize gas isolation inside and outside scroll compressor by the sealing structure arranged outside scroll line in the use process, and a single sealing strip structure is often used for sealing in the prior art, and the sealing structure may generate gap between the contact surface of dynamic plate and / or static plate due to friction or displacement, deformation or abrasion in the relative motion process of dynamic plate and static plate, which affects the sealing effect. SUMMARY

[0003] In view of at least one defect or improvement demand of prior art, the utility model provides a sealing structure and scroll compressor with it to improve the sealing effect of sealing structure.

[0004] To achieve the above object, the utility model first provides a sealing structure,

[0005] The sealing structure includes at least first sealing part and second sealing part, the first sealing part and the second sealing part are arranged in the first direction, and the first end of the first sealing part and the first end of the second sealing part are used to contact the first contact surface to form the sealing of the first end.

[0006] The first sealing part and the second sealing part have first interval space.

[0007] Sealing gas cavity is all or part of the first interval space.

[0008] Wherein, the first direction is the direction of gas inflow or outflow in the air gap generated between the first end and the first contact surface due to relative motion.

[0009] Further, the first sealing part and / or the second sealing part form the sealing of the outer periphery on the first contact surface in a continuous manner.

[0010] Further, the first sealing part and / or the second sealing part form the sealing of the outer periphery on the first contact surface in a continuous abutting arrangement.

[0011] Further, the first sealing part and / or the second sealing part has a projection area on the first contact surface greater than 0.

[0012] Further, a third sealing part is further included.

[0013] The third sealing part is arranged in the first interval space, and a first end of the third sealing part is in direct or indirect sealing contact with the first contact surface, so that the first interval space is isolated into a plurality of through or intermittent sealed gas cavities.

[0014] Further, the first sealing part and the second sealing part have different or same widths in the first direction.

[0015] Further, the sealed gas cavity has a first depth in the second direction, and the first depth is less than half of the depth of the first sealing part or the second sealing part in the second direction.

[0016] Further, the first sealing part and the second sealing part are mounted in a mounting groove.

[0017] The utility model also provides a scroll compressor with sealing structure, scroll compressor includes static scroll disc and dynamic scroll disc, scroll line outer circle of static scroll disc or dynamic scroll disc is provided with at least one mounting groove, mounting groove installs sealing structure,

[0018] The sealing structure is filled in at least one mounting groove, so that the sealing structure forms a sealed gas cavity with the static scroll disc and / or the dynamic scroll disc, and / or the internal structure of the sealing structure has a sealed gas cavity.

[0019] The utility model also provides a scroll compressor with sealing structure, scroll compressor includes static scroll disc and dynamic scroll disc, scroll line outer circle of static scroll disc or dynamic scroll disc is provided with at least one mounting groove, mounting groove installs sealing structure above.

[0020] Overall, compared with the prior art, the above technical scheme conceived by the utility model can achieve the following beneficial effects:

[0021] (1) The utility model first proposes a sealing structure, which includes two sealing parts and a sealed gas cavity formed by a first interval space between the two sealing parts. The sealed gas cavity forms an exchange space for buffering gas, thereby improving the sealing effect of the scroll compressor.

[0022] (2) The sealing structure in the utility model, through the arrangement structure of the sealing structure is designed, can make the arrangement of the sealed gas cavity form single or multiple single cavity, or single or multiple through cavity, in this way, realize the gas capacity or gas flow filling efficiency in the exchange space of the sealed gas cavity.

[0023] (3) The sealing structure in the utility model, especially suitable for the application in scroll compressor, improve the sealing effect between the dynamic disc and the static disc, reduce the possibility of high pressure gas pollution by external gas caused by the vibration under the high speed rotation of the dynamic disc. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the utility model embodiment, the drawings required in the embodiment will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without the creative labor for the ordinary skilled in the art.

[0025] Figure 1 The cross-sectional view of the scroll compressor provided by the utility model embodiment is provided;

[0026] Figure 2 The cross-sectional view of the sealing structure provided by the utility model embodiment is provided;

[0027] Figure 3 The top view of the scroll compressor provided by the utility model embodiment is provided;

[0028] Figure 4 The cross-sectional view of the sealing structure provided by the utility model embodiment is provided; Figure 3 The cross-sectional view of the first sealing part abutting place in the B direction;

[0029] Figure 5 The cross-sectional view of another abutting place of the first sealing part in the B direction; Figure 3

[0030] The cross-sectional view of the sealing structure with multiple sealing parts provided by the utility model embodiment is provided; Figure 6

[0031] The cross-sectional view of another sealing structure with multiple sealing parts provided by the utility model embodiment is provided; Figure 7

[0032] The cross-sectional view of another sealing structure provided by the utility model embodiment is provided; Figure 8

[0033] The cross-sectional view of the sealing structure with limiting structure provided by the utility model embodiment is provided; Figure 9

[0034] Figure 10 ​Another cross-sectional view of the scroll compressor is provided for the embodiment of the utility model.

[0035] Figure 11 A cross-sectional view of the sealing structure using a single sealing member is provided for the embodiment of the utility model.

[0036] Figure 12 A cross-sectional view of the sealing structure with the ventilation structure is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0038] The terms "first", "second", "third" and the like in the specification and claims of the utility model and the above drawings are used to distinguish different objects and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0039] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. The described embodiments are only possible technical implementations of the utility model and are not all possible implementations. Those skilled in the art can certainly obtain other embodiments by combining the embodiments of the utility model without creative labor, and these embodiments are also within the protection scope of the utility model.

[0040] As the first embodiment of the utility model, a sealing structure realized by two sealing parts is provided, which is applied to a scroll compressor. Figure 1 A cross-sectional view of the front view of the scroll compressor is shown, which includes the upper dynamic disc and the lower static disc. The scroll lines of the dynamic disc and the static disc are also shown in the figure. The sealing structure provided in this embodiment is located outside the scroll line of the scroll disc, that is Figure 1 A magnified view of the middle A, that is, the view of the sealing structure of this embodiment.

[0041] Figure 2 For Figure 1 A magnified view of the middle A, that is, the view of the sealing structure of this embodiment. Figure 2 Two sealing parts, referred to as the first sealing part and the second sealing part in this embodiment, are shown in the structure. Figure 2 In the structure shown, Figure 2 The left side of the first sealing part and the second sealing part is the external air.Figure 2 The right side is the internal space of the scroll compressor.

[0042] Figure 2 The first and second sealing parts are installed on the stationary plate, wherein, Figure 2 The two sealing parts shown are, respectively, the sealing part on the left being the first sealing part and the sealing part on the right being the second sealing part. A mounting groove is provided on the stationary disk, and the first and second sealing parts are disposed within the mounting groove. The top ends of the first and second sealing parts contact the moving disk. In this embodiment, the end of the first and second sealing parts that contacts the moving disk is referred to as the first end. The first and second sealing parts form a seal at the first end through contact with the first contact surface, and a first gap space is formed between them. The contact between the first and second sealing parts and the second contact surface can be direct contact between the first and second sealing parts. In this case, the first and second sealing parts are two parts that need to be installed independently. In other embodiments, the first and second sealing parts may have a third part, which assists in forming direct contact between the first and second sealing parts and the second contact surface.

[0043] exist Figure 2 In this configuration, the first sealing part and the second sealing part are spaced apart in a first direction. Figure 1 The first direction shown is the diameter direction of the scroll compressor. A first gap space is formed between the first sealing part and the second sealing part. In this embodiment, the first gap space forms a sealed air chamber, that is, the sealed air chamber is the entire first gap space.

[0044] The sealing principle of the above-mentioned sealing structure is as follows: First, both the first and second sealing parts are in contact with the stationary and moving discs, respectively. Therefore, the interior and exterior of the scroll compressor are isolated by two sealing parts, resulting in a better sealing effect compared to a conventional single-seal structure. Second, the sealed air chamber formed by the spaced arrangement of the first and second sealing parts allows gas inside the scroll compressor to flow into the sealed air chamber even when the contact surface between the second sealing part on the right and the moving disc creates an air gap due to relative motion during gas compression. Similarly, during vacuuming, even when the contact surface between the first sealing part on the left and the moving disc creates an air gap due to relative motion, outside air enters the sealed air chamber and mixes with the internal gas of the scroll compressor. A small amount of this mixed gas then enters the scroll compressor through the air gap at the top of the second sealing part. Thus, even if a small amount of outside air enters the scroll compressor, it will first mix with the internal gas in the sealed air chamber, further reducing the total amount of air leaking into the scroll compressor.

[0045] For example, when compressing and evacuating high-purity oxygen, if a single seal leaks, air will directly enter the scroll compressor. However, when two seals form a sealed chamber, air and high-purity oxygen mix within this chamber. Typically, the mixture maintains a relatively high oxygen concentration. Thus, even if a leak occurs in the top gap of the second seal, the gas leaking into the scroll compressor is a mixture containing a high concentration of oxygen. Compared to a direct air leak, this higher oxygen concentration mixture has less impact on the high-purity oxygen inside the scroll compressor.

[0046] Therefore, to achieve a better sealing effect, the first sealing part and the second sealing part are usually arranged continuously along the circumference of the stationary or moving disc. For example, Figure 3 The image shows a first and second sealing portion arranged continuously, forming a complete circle. In other embodiments, the first and second sealing portions may also form a continuous seal by abutting against each other. For example, Figure 4 A top view of a scroll compressor is shown. Figure 5 and Figure 3 It shows Figure 4 A cross-sectional view of the first sealing part at the contact point, along the direction of arrow B. Figure 5 The method of contact of the first sealing part is shown, which is the contact of two vertical sections. Figure 4 Another method of contact between the first sealing part and the first sealing part is shown, wherein the projected area of ​​the contact point at the first contact surface, i.e., the top surface of the first sealing part, is greater than 0. Compared to Figure 5 The method of contact shown Figure 4 The illustrated abutment method ensures that the abutment points are pressed together when the moving and stationary discs are pressed together, reducing deformation of the first sealing part. Those skilled in the art can also configure the first and / or second sealing parts to have multiple abutment points, or configure the abutment points to other structures that can achieve abutment, according to actual production needs; these will not be elaborated upon in this embodiment. It should be noted that, for ease of intuitive demonstration of the abutment point configuration, Figure 5 and Figure 6 The first sealing parts on the left and right sides of the joint are far apart. In actual use, the first sealing parts on the left and right sides should be tightly connected to avoid affecting the sealing effect.

[0047] As a second embodiment of this utility model, based on the first embodiment, a sealing structure composed of multiple sealing parts is provided. For example... Figure 7 and Figure 6 As shown, the outermost parts are the first sealing part and the second sealing part, and a first gap space is formed between the first sealing part and the second sealing part. The third sealing part is located within the first gap space. Figure 7The third sealing part shown has its top end not in contact with the first contact surface, so that the first gap space is divided into two through sealing cavities. Figure 8 The third sealing portion shown has its top end in contact with the first contact surface, thereby dividing the first interval space into two discontinuous sealed cavities. Those skilled in the art can also, according to design requirements, provide multiple third sealing portions of different heights within the first interval space formed by the first and second sealing portions, as in this embodiment.

[0048] As a third embodiment of this utility model, based on the first or second embodiment, yet another sealing structure is provided. Unlike the first and second embodiments, the sealing structure in this embodiment may have inconsistent widths in the first direction. For example, Figure 9 The illustration shows an embodiment that uses a first sealing portion and a second sealing portion with different widths as a sealing structure. Those skilled in the art can also use other embodiments where the widths of the first sealing portion and the second sealing portion differ in the first direction.

[0049] In the above embodiments, to prevent the sealing parts from shifting with the rotation of the moving plate, the first and second sealing parts typically need to have their displacement limited by a limiting member. As a preferred embodiment, the limiting member is disposed between the first and second sealing parts, such as... Figure 1 As shown. The height of the limiting member usually needs to be high enough to fix the first and second sealing parts, typically half the height of the first and second sealing parts. Alternatively, this invention can employ two mounting grooves on the stationary plate, with a raised structure between them. The height of the raised structure also needs to exceed half the height of the first and second sealing parts. Both of these embodiments ensure that the depth of the sealing cavity in the second direction does not exceed half the depth of the first and second sealing parts in the second direction, effectively stabilizing the first and second sealing parts.

[0050] In this invention, the first direction is defined as the direction in which gas flows in or out of the air gap created by the relative motion between the first end and the first contact surface. For example, in Figure 10 In the scroll compressor shown, where both the moving and stationary discs are nearly planar, the first direction is approximately the radial direction of the moving and stationary discs. For example, in... Figure 10 In the scroll compressor shown, where the stationary disc has a concave shape, the sealing structure can also be located on the side of the stationary disc, i.e. Figure 10 At point C, the first direction still needs to be the direction in which gas flows in or out of the air gap, i.e. Figure 11 The direction perpendicular to the stationary disk.

[0051] In this invention, the first sealing part and the second sealing part are the two outermost sealing parts forming the sealing structure. In the above embodiments, the first sealing part is always the outermost sealing part, and the second sealing part is the innermost sealing part. In other embodiments, the first sealing part may also be the innermost sealing part, and the second sealing part may be the outermost sealing part.

[0052] In the above embodiments, both the first sealing part and the second sealing part are circular near the outer edge of the stationary disk when viewed from above. In other embodiments, the shape of the first sealing part and the second sealing part when viewed from above can also be various polygonal structures, as long as they can form a continuous seal around the outside of the vortex line of the stationary or moving disk.

[0053] In the above embodiments, the first sealing part and the second sealing part may also belong to the same sealing element. For example, see Figure 11 The structure, Figure 12 A single U-shaped seal is used, with its left side referred to as the first sealing part and its right side referred to as the second sealing part. This embodiment uses a single, one-piece molded seal and can still achieve a sealing effect using the same principle as the embodiments described above.

[0054] In the above embodiments, the mounting grooves of the sealing structure are all located on the stationary plate, making it a relatively easy structure to manufacture. Those skilled in the art can also install the sealing structure on the moving plate as needed; in this case, the first contact surface is the contact surface between the first sealing part, the second sealing part, and the stationary plate.

[0055] In the above embodiments, the contact surfaces between the first and second sealing parts and the stationary disk are both planar. In this invention, the contact surfaces between the first and second sealing parts and the stationary disk can also be configured with other shapes, such as an arc-shaped connection, while still achieving a similar effect. This configuration will not be elaborated further here.

[0056] In the above embodiments, air can also be pumped into the sealed air cavity by providing a ventilation structure, such as... ​ As shown, in this configuration, a certain amount of gas can be maintained within the sealed gas chamber, resulting in a better sealing effect. Furthermore, the venting structure creates a slight positive pressure on the outside of the scroll compressor from the sealed gas chamber, which further enhances the sealing effect. Those skilled in the art can choose whether to add this venting structure based on sealing requirements.

[0057] This utility model also provides a scroll compressor, which includes a stationary scroll and a moving scroll. At least one mounting groove is provided on the outer circumference of the scroll line of the stationary scroll or the moving scroll, and a sealing structure is installed in the mounting groove.

[0058] A sealing structure is filled in at least one mounting groove, thereby forming a sealing air cavity between the sealing structure and the stationary scroll and / or the moving scroll, and / or the internal structure of the sealing structure has a sealing air cavity.

[0059] This utility model also provides a scroll compressor with a sealing structure. The scroll compressor includes a stationary scroll and a moving scroll. At least one mounting groove is provided on the outer circumference of the scroll line of the stationary scroll or the moving scroll. The sealing structure as described in any of the above embodiments is installed in the mounting groove.

[0060] The foregoing description is merely an exemplary embodiment 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.

[0061] 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.

[0062] 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 sealing structure, characterized in that, The sealing structure includes at least a first sealing portion and a second sealing portion, the first sealing portion and the second sealing portion are arranged in a first direction, and a first end of the first sealing portion and a first end of the second sealing portion are used to contact a first contact surface to form a seal at the first end; The first sealing portion and the second sealing portion have a first gap space; The sealed air cavity is all or part of the first interval space; Wherein, the first direction is the direction in which gas flows in or out of the air gap created by the relative motion between the first end and the first contact surface.

2. The sealing structure as described in claim 1, characterized in that, The first sealing portion and / or the second sealing portion form a continuous seal around the outer periphery of the first contact surface.

3. The sealing structure as described in claim 1, characterized in that, The first sealing portion and / or the second sealing portion form a seal on the outer periphery of the first contact surface in a continuous abutting arrangement.

4. The sealing structure as described in claim 3, characterized in that, The projected area of ​​the first sealing part and / or the second sealing part on the first contact surface at the abutment point is greater than 0.

5. The sealing structure as described in claim 1, characterized in that, It also includes a third sealing part; The third sealing part is disposed within the first interval space, and the first end of the third sealing part is in direct or indirect sealing contact with the first contact surface, so that the first interval space is isolated into multiple through or intermittent sealed air chambers.

6. The sealing structure as described in claim 1, characterized in that, The widths of the first sealing portion and the second sealing portion in the first direction may be different or the same.

7. The sealing structure as described in claim 1, characterized in that, The sealing air cavity has a first depth in the second direction. The first depth is less than half the depth of the first sealing part or the second sealing part in the second direction when compared with the depth of the first sealing part or the second sealing part in the second direction.

8. The sealing structure as described in claim 1, characterized in that, The first sealing part and the second sealing part are installed in a mounting groove.

9. A scroll compressor with a sealed structure, the scroll compressor comprising a stationary scroll and a moving scroll, characterized in that: The static or dynamic vortex disk has at least one mounting groove distributed around the outer circumference of the vortex line, and a sealing structure is installed in the mounting groove. The sealing structure is filled in at least one of the mounting grooves, thereby forming a sealing air cavity between the sealing structure and the stationary scroll plate and / or the moving scroll plate, and / or the internal structure of the sealing structure has a sealing air cavity.

10. A scroll compressor with a sealed structure, the scroll compressor comprising a stationary scroll and a moving scroll, characterized in that: The static or dynamic vortex disk has at least one mounting groove distributed around its outer circumference, and the mounting groove contains a sealing structure as described in any one of claims 1-8.

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