Sealing structure with air passage and scroll compressor with sealing structure

Abstract

The utility model discloses a sealing structure with a ventilation channel and a scroll compressor with the same, the sealing structure is used for being mounted in a mounting groove, the sealing structure comprises at least two sealing parts, the sealing parts are arranged in the width direction of the mounting groove at intervals, and a first interval space is formed between the two sealing parts; the first sealing air cavity is all or part of the first interval space; the first sealing air cavity is used for being communicated with at least one air passage and receiving air with a certain volume input by the air passage. The sealing effect of the sealing structure can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a sealing structure with air passage and scroll compressor with the same. BACKGROUND

[0002] Scroll compressor is a kind of gas compressor without reciprocating mechanism, which mainly relies on scroll line between dynamic scroll plate (hereinafter referred to as dynamic plate) and static scroll plate (hereinafter referred to as static plate) to compress the gas needed to be processed to obtain high pressure gas. In the process of using scroll compressor, sealing structure arranged outside the scroll line is needed to realize the gas isolation inside and outside the scroll compressor. In the prior art, a single sealing strip structure is often used for sealing. During the relative movement of the dynamic plate and the static plate, displacement, deformation or wear may be caused by friction or relative movement, resulting in gap between the contact surface of the sealing structure and the dynamic plate and / or the static plate, which affects the sealing effect. SUMMARY

[0003] In view of at least one defect or improvement demand of the prior art, the present application provides a sealing structure with air passage and scroll compressor with the same to improve the sealing effect of the sealing structure.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme. The present application provides a sealing structure with air passage,

[0005] The sealing structure comprises at least two sealing parts;

[0006] The sealing parts are installed on the second contact surface and arranged in the first direction, and the first end of the sealing part is used to contact the first contact surface to form the sealing of the first end.

[0007] The two sealing parts have a first interval space;

[0008] The sealing gas cavity is all or part of the first interval space;

[0009] The second contact surface is provided with an air passage hole, so that the sealing gas cavity is connected with at least one first air passage through the air passage hole.

[0010] The first direction is the direction of gas inflow or outflow in the air gap between the first end of the sealing part and the first contact surface due to relative movement.

[0011] Further, a limiting piece is arranged between the sealing parts, and the limiting piece is also fixedly installed with the second contact surface. In this way, the limiting piece occupies a certain space in the first interval space.

[0012] Furthermore, the limiting member is provided at intervals along the outer periphery of the second contact surface, and the vent hole is provided at the interval of the limiting member.

[0013] Furthermore, the limiting member is continuously arranged along the outer periphery of the second contact surface, and a second vent is provided on the limiting member, so that the sealed air cavity is connected to the first vent through the vent hole and the second vent.

[0014] Furthermore, the sealing part is fixed to the mounting groove through the protruding structure of the second contact surface.

[0015] Furthermore, the vent holes are spaced apart along the outer periphery of the second contact surface at the intervals of the protruding structures.

[0016] Furthermore, a third vent is provided on the protruding structure along the outer periphery of the second contact surface, so that the sealed air cavity is connected to the first vent through the vent hole and the third vent.

[0017] Furthermore, a fourth vent is provided on the sealing part so that the sealing air chamber is connected to the first vent through the vent hole and the fourth vent.

[0018] The present invention also provides a mounting groove for installing a sealing structure, the mounting groove being disposed outside the vortex line of a stationary or moving vortex disk, the mounting groove having a certain width in a first direction for installing the sealing structure as described in any of the above claims; the mounting groove further includes a vent hole for connecting to a first vent passage.

[0019] The present invention also provides a scroll compressor with a sealing structure, the scroll compressor comprising a stationary scroll and a moving scroll, characterized in that: at least one mounting groove is provided on the outer circumference of the scroll line of the stationary scroll or the moving scroll, and the sealing structure as described in any of the above is installed in the mounting groove; the mounting groove further includes a vent hole for connecting to a first vent passage.

[0020] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0021] The present invention first proposes a sealing structure, which includes two sealing parts and a sealing air chamber formed by a first gap between the two sealing parts. The air chamber can maintain a positive pressure effect on the outside of the compressor through a vent hole, thereby achieving a seal inside the scroll compressor. Attached Figure Description

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0023] Figure 1 A sectional view of a scroll compressor provided by the embodiment of the present application;

[0024] Figure 2 A sectional view of a sealing structure provided by the embodiment of the present application;

[0025] Figure 3 A top view of a scroll compressor provided by the embodiment of the present application;

[0026] Figure 4 A sectional view of a sealing structure with a limiting member structure provided by the embodiment of the present application;

[0027] Figure 5 A top view of another sealing structure with a limiting member structure provided by the embodiment of the present application;

[0028] Figure 6 A sectional view of a sealing structure with a protruding structure provided by the embodiment of the present application;

[0029] Figure 7 A sectional view of a sealing structure with an L-shaped sealing part provided by the embodiment of the present application;

[0030] Figure 8 A sectional view of another scroll compressor provided by the embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] The terms "first", "second", "third", etc. in the specification and claims of the present application 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. For example

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The described embodiments are only possible technical implementations of the present application, and not all possible implementations. Those skilled in the art can obtain other embodiments by combining the embodiments of the present application without creative effort, and these embodiments are also within the protection scope of the present application.

[0034] As a first embodiment of the present application, a sealing structure realized by two sealing parts is provided. Figure 1 A cross-sectional view of a front view of a scroll compressor is shown, including an upper part of a dynamic disc and a lower part of a static disc. The scroll lines of the dynamic disc and the static disc are also shown in the figure. The sealing structure provided in the embodiment is located outside the scroll lines of the scroll disc, that is, Figure 1 A, in the figure.

[0035] Figure 2 For Figure 1 A, that is, a view of the sealing structure of the embodiment. Figure 2 Two sealing parts, referred to as a first sealing part and a last sealing part in the embodiment, are shown in the figure. The first sealing part and the last sealing part are arranged at intervals in a first direction. In Figure 2 The structure shown in the figure, Figure 2 The left side of the figure is external air, Figure 2 The right side of the figure is an internal space of the scroll compressor.

[0036] Figure 2 The first sealing part and the last sealing part in the figure are installed on the static disc, in which, Figure 2 Two sealing parts are shown in the figure, the left sealing part is the first sealing part, and the right sealing part is the last sealing part. An installation groove is provided on the static disc, and the first sealing part and the last sealing part are arranged in the installation groove, in which, the first sealing part is attached to a first face of the installation groove, and the last sealing part is attached to a second face of the installation groove. The top ends of the first sealing part and the last sealing part are in contact with the dynamic disc. In the embodiment, the end of the first sealing part and the last sealing part in contact with the dynamic disc is referred to as a first end.

[0037] In Figure 2 The first sealing part and the last sealing part are arranged at intervals in the first direction. In which, Figure 2 The first direction shown in the figure is a diameter direction of the scroll compressor. A first interval space is formed between the first sealing part and the last sealing part, in the embodiment, the first interval space forms a sealing gas cavity, that is, the sealing gas cavity is all the first interval space.

[0038] In Figure 3 The sealing gas cavity is also connected to a lower air passage through an air hole, which is referred to as a first air passage in the present application. The first air passage is usually used to be connected to a gas supply device, and the gas supply mode is not shown in the figure.

[0039] The sealing principle of the sealing structure is as follows: first, the sealing portions are in contact with the static disc and the dynamic disc, so the inside and outside of the scroll compressor are separated by the two sealing portions, and the sealing effect is better than that of the conventional structure with one sealing portion. Second, the sealing gas cavity is formed between the sealing portions, the gas cavity is supplied with gas through the first air passage, and the internal gas pressure is the same as or slightly greater than the external air pressure. When the scroll compressor is vacuumized, even if the contact surface of the first sealing portion on the left side and the dynamic disc has an air gap due to relative movement, external air is difficult to enter the sealing gas cavity through the air gap due to the internal and external gas pressures. In particular, when a slight positive pressure is formed in the gas cavity, the pressure difference between the inside and outside will prevent external air from entering the sealing gas cavity. This makes the compressed gas inside the scroll compressor not absorb external air, achieving a better airtight effect.

[0040] Generally, the gas source connected by the first air passage is the gas used for compression in the scroll compressor, i.e., the same gas as the internal gas of the scroll compressor. In other embodiments, for example, when 93% to 95% pure oxygen is vacuumized and compressed by the scroll compressor, oxygen with higher purity can also be used as the gas source connected by the first air passage.

[0041] In this embodiment, the size of the sealing gas cavity has little effect on the sealing effect, so the amount of total compressed gas in the sealing gas cavity will not be too large, and the air holes do not need to be densely arranged in the circumferential direction, but only need to be provided in the circumferential direction. For example, Figure 4 A scheme of arranging 4 air holes on the static disc is shown. Those skilled in the art can also increase or decrease the number of air holes in the circumferential direction according to needs, such as the size of the static disc.

[0042] As a second embodiment of the present application, the mounting method of the sealing portion is further limited based on the first embodiment. When the dynamic disc and the static disc move relatively, the sealing portion may be displaced due to the frictional force of the dynamic disc or the static disc, so certain mounting measures need to be taken to fix the sealing portion.

[0043] In order to further achieve the fixed installation of the sealing portion, see Figure 4 A limiting member can be arranged between the sealing portions. The height of the limiting member usually needs to be high enough to fix the sealing portion, and usually needs to be half of the height of the sealing portion. On the other hand, the limiting member can be a structure with a certain elasticity, used to push the sealing portion towards the first face and the second face of the mounting groove in the lateral direction, and the lateral extrusion force can achieve the fixation of the limiting member.

[0044] When the limiting member is continuous in the circumferential direction of the outer periphery of the static disc, a structure as shown in Figure 5In this way, a second vent is opened on the limiting component. The second vent is connected to the through hole, and then to the first vent. In this way, a ventilation structure can be formed to deliver gas into the sealed air cavity through the first vent and the second vent, thereby achieving a sealing effect.

[0045] Another setup method can be found here. Figure 6 When the limiting component is discontinuous in the circumferential direction of the stationary plate, a vent hole and a first vent can be set at the discontinuity. In this way, the circumferential sealed air chamber can still be supplied with gas through the first vent to achieve a sealing effect.

[0046] Figure 6 This illustrates another way of fixing the seal. Figure 6 In the middle, a raised structure is left on the second contact surface of the stationary plate. This raised structure forms a groove structure between the first and second surfaces of the mounting groove for installing the sealing part. The sealing part is then installed... Figure 6 The sealing part can also be fixed in the small groove structure shown.

[0047] Similar to the limiting component, when the protruding structure is continuous along the circumferential direction of the stationary disk, the following can be used: Figure 7 In this method, a third vent is created on the raised structure. This third vent connects to the through hole, which in turn connects to the first vent. Thus, a venting structure for supplying gas into the sealed air cavity is formed through the first and third vents, thereby achieving a sealing effect. When the raised structure is discontinuous in the circumferential direction of the stationary plate, a vent and the first vent can be provided at the discontinuity. In this way, the circumferentially sealed air cavity can still supply gas through the first vent, achieving a sealing effect.

[0048] As a third embodiment of the present invention, based on the first embodiment, when the bottom width of the sealing part is too wide and may block the vent, a fourth vent can be opened on the sealing part to achieve the sealing effect as in the first embodiment. Figure 7 The diagram illustrates the arrangement of the vent passage when an L-shaped seal is used. Figure 1 In the middle, the sealing part on the right is L-shaped, and its bottom may block the vent hole on the stationary plate. Therefore, a fourth vent is needed on this sealing part to connect to the vent hole and then to the first vent.

[0049] 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 8 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 8The static disc shape is concave, and the sealing structure can also be arranged on the side of the static disc, that is Figure 8 C, at which time the first direction still needs to be kept as the direction of gas inflow or outflow in the air gap, that is ​ perpendicular to the static disc.

[0050] In the above embodiments, the two sealing portions are circular in shape near the outer edge of the static disc in a top view, and in other embodiments, the two sealing portions can also be various polygonal structures in a top view, as long as a continuous seal is formed outside the scroll line of the static disc or the dynamic disc.

[0051] In the above embodiments, the mounting grooves of the two sealing portions are arranged on the static disc, which is a relatively easy-to-process structure. Those skilled in the art can also install the sealing portions on the dynamic disc according to needs, at which time the first contact surface is the contact surface of the sealing portion and the static disc.

[0052] In the above embodiments, the contact surfaces of the two sealing portions and the static disc are both flat. In the present application, the contact surfaces of the sealing portions and the static disc can also be arranged in other shapes, for example, can be arc-shaped connections, and similar effects can still be achieved. Regarding this arrangement, no further description is given here.

[0053] The present application also provides a mounting groove for mounting a sealing structure, characterized in that the mounting groove is arranged outside the scroll line of the static scroll disc or the dynamic scroll disc, the mounting groove has a certain width in the first direction, and is used for mounting the sealing structure of any one of the above embodiments; the mounting groove also includes an air hole connected to the first air passage.

[0054] The present application also provides a scroll type compressor with a sealing structure, the scroll type compressor including a static scroll disc and a dynamic scroll disc, characterized in that at least one mounting groove is arranged outside the scroll line of the static scroll disc or the dynamic scroll disc, and the sealing structure of any one of the above embodiments is mounted in the mounting groove; the mounting groove also includes an air hole connected to the first air passage.

[0055] It should be noted that for the above-mentioned method embodiments, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0056] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0057] The above-described embodiments are merely exemplary and do not limit the scope of the disclosure. Any equivalent changes, modifications and improvements made to the embodiments according to the teachings of the disclosure fall within the scope of the disclosure. It will be readily apparent to those skilled in the art that certain changes and modifications can be made to the embodiments without departing from the spirit and scope of the disclosure. The present disclosure is intended to include all such changes and modifications.

[0058] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described, however, any combination of the technical features is considered to be within the scope of the present disclosure.

[0059] Those skilled in the art easily understand that the above-mentioned are only the preferred embodiments of the present application, and are not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sealed structure with a venting passage, characterized in that, the sealed structure comprises at least two sealing parts; the sealing parts are installed on a second contact surface and arranged in a first direction, and the first end of the sealing parts is used to contact a first contact surface to form a seal at the first end; the two sealing parts have a first spacing space; a sealed gas cavity is all or part of the first spacing space; a venting hole is provided on the second contact surface, so that the sealed gas cavity is connected to at least one first venting passage through the venting hole; wherein the first direction is the direction of gas inflow or outflow in the air gap generated between the first end of the sealing part and the first contact surface due to relative movement.

2. The sealed structure with a vent of claim 1, wherein, A limiting part is provided between the sealing parts, and the limiting part is also fixedly installed with the second contact surface, in this way, the limiting part occupies a certain space in the first spacing space.

3. The sealed structure with a vent of claim 2, wherein, The limiting part is arranged at intervals along the outer periphery of the second contact surface, and the venting hole is arranged at the intervals of the limiting part.

4. The sealed structure with a vent of claim 2, wherein, The limiting part is continuously arranged along the outer periphery of the second contact surface, and a second venting passage is provided on the limiting part, so that the sealed gas cavity is connected to the first venting passage through the venting hole and the second venting passage.

5. The sealed structure having a vent according to claim 1, wherein, The sealing part is fixed with the installation groove through the protruding structure of the second contact surface.

6. The sealed structure with a vent of claim 5, wherein, The protruding structure is arranged at intervals along the outer periphery of the second contact surface, and the venting hole is arranged at the intervals of the protruding structure.

7. The sealed structure having a vent according to claim 5, wherein, The protruding structure is continuously arranged along the outer periphery of the second contact surface, and a third venting passage is provided on the protruding structure, so that the sealed gas cavity is connected to the first venting passage through the venting hole and the third venting passage.

8. The sealed structure having a vent according to any one of claims 1, wherein, A fourth venting passage is provided on the sealing part, so that the sealed gas cavity is connected to the first venting passage through the venting hole and the fourth venting passage.

9. A mounting groove for mounting a sealing structure, characterized by The installation groove is provided outside the scroll line of the static scroll or the dynamic scroll, and has a certain width in the first direction for installing the sealed structure with a venting passage as claimed in any one of claims 1-8; the installation groove further comprises a venting hole for connecting with the first venting passage.

10. A scroll compressor comprising a fixed scroll and an orbiting scroll, characterized by: At least one installation groove is provided on the outer periphery of the scroll line of the static scroll or the dynamic scroll, and the sealed structure as claimed in any one of claims 1-8 is installed in the installation groove; the installation groove further comprises a venting hole for connecting with the first venting passage.

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