Involute stator of scroll compressor and scroll compressor

Abstract

The utility model provides an involute stator of scroll compressor and scroll compressor, the involute stator disc end face of involute stator is equipped with the sealing member with the lip, the lip of the sealing member contacts with the sealing surface between involute stator disc and involute rotor, the sealing member is equipped with the compression surface close to the lip, and the compression surface is equipped with the sealing surface close to the involute rotor. The purpose of the pressed face is that the pressed face can be pressed to enable the lip edge to be in contact with the sealing face all the time in the air pressure increasing process. The involute of the involute stator disc is divided into a low-pressure-area involute and a high-pressure-area involute, and the inclination angle of the pressed face of the sealing piece installed at the low-pressure-area involute is smaller than the inclination angle of the pressed face of the sealing piece installed at the high-pressure-area involute. According to the utility model, the translation property of the involute rotor can be ensured while the sealing property of a high-pressure area is ensured.

Description

Technical Field

[0001] The utility model relates to the field of scroll compressors, in particular to an involute stator of a scroll compressor and a scroll compressor. Background Art

[0002] The working principle of the scroll compressor is mainly based on two involute scroll scrolls of the same shape but with an angular phase position relative to each other of 180°. One is the fixed scroll, i.e. the stator, and the other is the orbiting scroll, i.e. the rotor, which is driven by the eccentric shaft and whose axis revolves around the axis of the fixed scroll. The two scrolls are tangent to form sealing lines at multiple locations, and there are also appropriate seals at the end faces of the scrolls, thus forming multiple crescent-shaped air cavities. When the eccentric shaft rotates, the orbiting scroll will revolve relative to the fixed scroll. This movement causes the sealing line at the common tangent point between the two scrolls to continuously shift along the scroll curve, resulting in a continuous change in the shape and size of the crescent-shaped air cavity. As these air cavities close, they are no longer connected to the suction cavity, and their enclosed volume is gradually transferred to the center of the fixed scroll and shrinks, so that the gas is gradually compressed and the pressure increases.

[0003] The working principle of the scroll compressor makes it have the advantages of simple structure, high reliability, small torque change, high balance, small vibration, and low noise. However, it also has disadvantages such as difficulty in achieving a large compression ratio due to sealing problems. In the scroll compressor, a sealing groove is mainly provided on the surface of the rotor, and a sealing strip for generating static friction is placed in the sealing groove. However, the flatness of the contact surface of the sealing strip is required to be high, and the assembly accuracy of the stator and the rotor is also required to be high. In addition, the service life of the sealing strip is not long, and poor sealing often leads to a decrease in compression efficiency, increased energy consumption, and even machine failure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides an involute stator of a scroll compressor and a scroll compressor, wherein a seal with a lip is installed on the end face of the involute stator disk of the involute stator, the lip of the seal is in contact with a sealing surface, and a pressure surface is provided on the seal near the lip, the purpose of the pressure surface is to be pressurized when the air pressure increases so that the lip can always be in contact with the sealing surface, thereby achieving a sealing effect.

[0005] The utility model achieves the above technical purpose through the following technical means.

[0006] An involute stator of a scroll compressor, wherein a seal with a lip is installed on the end face of the involute stator disk of the involute stator, the lip of the seal contacts the sealing surface between the involute stator disk and the involute rotor, and a pressure surface is provided on the seal near the lip, the purpose of the pressure surface is to be pressurized when the air pressure increases so that the lip is always in contact with the sealing surface.

[0007] Furthermore, the involute of the involute stator disk is divided into an involute at a low pressure zone and an involute at a high pressure zone, and the pressure surface inclination angle α of the installed seal at the involute at the low pressure zone is smaller than the pressure surface inclination angle β of the installed seal at the involute at the high pressure zone.

[0008] Furthermore, the angle α between the pressure surface and the sealing surface of the installed seal at the involute in the low-pressure zone is in the range of 30 to 45°.

[0009] Furthermore, the angle β between the pressure-bearing surface and the sealing surface of the installed seal at the involute in the high-pressure zone is in the range of 50 to 75°.

[0010] Furthermore, the end surface of the involute stator disk is provided with a groove, the bottom of the groove is provided with a slot, one end of the seal is hook-shaped for installation in the slot, one end of the hook-shaped seal is provided with an L-shaped frame, and an elastomer is wrapped around the outside of the frame.

[0011] Furthermore, two sealing members with lips are symmetrically installed on the end surface of the involute stator disc.

[0012] Furthermore, the involute stator disc in the low-pressure zone is provided with a seal with a lip, and the involute stator disc in the high-pressure zone is provided with two seals with lip symmetrically installed.

[0013] A scroll compressor comprises an involute stator and an involute rotor of the scroll compressor.

[0014] Furthermore, by changing the axial distance of the involute rotor, the lip edge of the seal has a pre-compression amount.

[0015] Furthermore, after assembly, the installation distance X between the involute stator disk end face of the involute stator and the involute rotor is X=(0.4~0.75)*(L1+L2)+C, where L1 is the length of the lip 3-1, L2 is the length of the cross section of the pressure surface 3-4, and C is the axial allowable side clearance of the involute rotor 2.

[0016] The beneficial effects of the utility model are:

[0017] 1. The involute stator of the scroll compressor described in the utility model has a seal with a lip installed on the end face of the involute stator disk of the involute stator, the lip of the seal is in contact with the sealing surface, and a pressure surface is provided on the seal near the lip. The purpose of the pressure surface is to be pressurized when the air pressure increases so that the lip can always be in contact with the sealing surface to achieve a sealing effect.

[0018] 2. The involute stator of the scroll compressor described in the utility model divides the crescent-shaped compression cavity whose volume changes during operation into a low-pressure zone and a high-pressure zone. The inclination angle α of the pressure surface of the seal installed at the involute in the low-pressure zone is smaller than the inclination angle β of the pressure surface of the seal installed at the involute in the high-pressure zone. In this way, the sealing performance of the high-pressure zone can be ensured while ensuring the translation performance of the involute rotor.

[0019] 3. The involute stator of the scroll compressor described in the utility model, the sealing between the involute rotor and the involute stator disk must consider both the sealing during the rotation of the involute rotor and the sealing during the movement of the involute rotor; and the translation distance of the involute at the low-pressure area is greater than that of the involute at the high-pressure area, and the angle α between the pressure surface of the installed seal at the involute at the low-pressure area and the A surface is less than 45°, which can ensure that the involute rotor is subjected to relatively small friction during the movement, but will cause the sealing performance to decrease during the rotation process. Although the sealing performance during the rotation process is sacrificed, it is beneficial to the movement of the low-pressure area of ​​the involute stator. The sealing performance of the involute at the high-pressure area must be guaranteed, and the angle β between the pressure surface of the installed seal at the involute at the high-pressure area and the A surface is greater than 50°, which can ensure that the involute rotor is subjected to relatively large friction during the rotation process, but will cause the wear of the seal during the movement to increase. Although the life of the seal is affected, it is beneficial to the sealing of the high-pressure area of ​​the involute stator.

[0020] 4. The involute stator of the scroll compressor described in the utility model has a groove on the end surface of the involute stator disk, and one end of the seal is hook-shaped, which is used to be installed on one side of the convex groove. An L-shaped frame is provided inside one end of the hook-shaped seal 3, so that one end of the end seal has good rigidity and can be stuck in the groove. The elastic body is wrapped on the outside of the frame, so that the frame will not be damaged when the seal is installed using metal tools.

[0021] 5. The scroll compressor described in the utility model can maintain a pre-pressure on the lip of the seal in the scroll compressor that has been used for a period of time by changing the axial distance of the involute rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a front view of the involute stator of the scroll compressor described in the utility model.

[0024] Figure 2 for Figure 1 AA section view.

[0025] Figure 3 for Figure 2 A partial enlarged view of point I in the middle.

[0026] Figure 4 This is an enlarged view of the involute seal in the high-pressure area.

[0027] Figure 5 A cross-sectional view of another sealing embodiment.

[0028] 1-involute stator; 1-1-involute stator disk; 1-2-groove; 2-involute rotor; 3-seal; 3-1-lip; 3-2-skeleton; 3-3-elastic body; 3-4-pressure surface; 3-5-installation groove; 4-air outlet; 5-involute at high pressure area; 6-involute at low pressure area. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1 and Figure 3 As shown, the involute stator of the scroll compressor of the utility model is provided with a seal 3 with a lip installed on the end surface of the involute stator disk 1-1 of the involute stator 1. The installation surface of the seal 3 with a lip is generally the sealing surface between the involute stator disk 1-1 and the involute rotor 2. Figure 3 The lip 3-1 of the seal 3 is in contact with the sealing surface, and a pressure surface 3-4 is provided on the seal 3 near the lip 3-1. The purpose of the pressure surface 3-4 is to pressurize the pressure surface 3-4 during the process of increasing air pressure so that the lip 3-1 can always be in contact with the sealing surface to achieve the sealing effect.

[0033] like Figure 2 As shown, generally, there are four crescent-shaped compression cavities with changing volumes in the involute stator 1 and the involute rotor 2 during operation, and one compression cavity with changing volume that can be connected to the intake end is defined as a low-pressure zone. According to the maximum volume in the change of the low-pressure zone, the involute of the involute stator disk 1-1 is divided into an involute 6 at the low-pressure zone and an involute 5 at the high-pressure zone. The inclination angle α of the pressure surface 3-4 of the seal 3 installed at the involute 6 at the low-pressure zone is smaller than the inclination angle β of the pressure surface 3-4 of the seal 3 installed at the involute 5 at the high-pressure zone; as shown in FIG. Figure 3 is a cross-sectional view of the involute 6 at the low-pressure area, in which the angle α between the pressure surface 3-4 of the installed seal 3 at the involute 6 at the low-pressure area and the A surface is in the range of 30 to 45°; Figure 4It is a cross-sectional view of the involute 5 at the high-pressure zone. In the figure, the angle β between the pressure surface 3-4 of the seal 3 installed at the involute 5 at the high-pressure zone and the A surface is in the range of 50 to 75°. This design is determined according to the working principle of the involute rotor 2. Due to the eccentric rotation of the involute rotor 2, the sealing between the involute rotor 2 and the involute stator disk 1-1 needs to consider both the sealing during the rotation of the involute rotor 2 and the sealing during the movement of the involute rotor 2 (that is, the eccentric rotation of the involute rotor 2 is regarded as a rotational motion and a plane movement); while the translation distance at the involute 6 at the low-pressure zone is greater than that of the involute 5 at the high-pressure zone, and the angle α between the pressure surface 3-4 of the seal 3 installed at the involute 6 at the low-pressure zone and the A surface is less than 45°, which can ensure that the involute rotor 2 is subjected to a relatively small friction force during the movement, but will lead to a decrease in the sealing performance during the rotation process. Although the sealing performance during the rotation process is sacrificed, it is beneficial to the movement of the low-pressure zone of the involute stator 1. The sealing of the involute 5 in the high-pressure area must be ensured. The angle β between the pressure surface 3-4 of the seal 3 installed at the involute 5 in the high-pressure area and the A surface is greater than 50°, which can ensure that the involute rotor 2 is subjected to a relatively large friction force during rotation, but will cause the seal 3 to wear more during movement. Although the service life of the seal 3 is affected, it is beneficial to the sealing of the high-pressure area of ​​the involute stator 1.

[0034] like Figure 3 As shown, generally, two seals 3 with lips are symmetrically installed on the end face of the involute stator disc 1-1, but it is also possible to install one seal 3 with lips only on the involute stator disc 1-1 in the low-pressure area, and two seals 3 with lips are symmetrically installed on the involute stator disc 1-1 in the high-pressure area, and the direction of the lips 3-1 of the seals 3 in the low-pressure area is determined according to the pressure on both sides during the working process.

[0035] like Figure 3 As shown, the end surface of the involute stator disk 1-1 is provided with a groove 1-2, and the cross section of the groove 1-2 is convex, or can be dovetail-shaped. One end of the seal 3 is hook-shaped, used to be installed on one side of the convex groove 1-2, and an L-shaped frame 3-2 is provided inside one end of the hook-shaped seal 3, so that one end of the end seal 3 has good rigidity and can be stuck in the groove 1-2. The elastic body 3-3 is wrapped outside the frame 3-2, so that the frame 3-2 will not be damaged when the seal 3 is installed using a metal tool.

[0036] Symmetrical installation of two seals 3 with lips on the end face of the involute stator disc 1-1 may cause cumbersome assembly. Figure 5 As shown, the present invention integrates two seals 3 with lips into one body to form a seal with symmetrical lips. An installation groove 3-5 is provided in the middle of the seal to facilitate the installation of the seal with symmetrical lips.

[0037] like Figure 3 As shown, during the installation process, a certain amount of pre-pressure needs to be applied to the lip 3-1 of the seal 3 so that the installation distance X between the end face of the involute stator disk 1-1 and the involute rotor 2 after installation is generally X=(0.4~0.75)*(L1+L2)+C, where L1 is the length of the lip 3-1, L2 is the length of the cross section of the pressure surface 3-4, and C is the axial allowable side clearance of the involute rotor 2.

[0038] The scroll compressor of the present invention comprises an involute stator 1 and an involute rotor 2. A seal 3 with a lip is installed on the end surface of the involute stator disk 1-1 of the involute stator 1. The lip 3-1 of the seal 3 contacts the involute rotor 2 for sealing. The involute rotor 2 is installed on an eccentric shaft. After the scroll compressor is used for a period of time, a paper copper pad is added axially to change the axial distance of the involute rotor 2 so that the lip 3-1 of the seal 3 still has a preload.

[0039] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0040] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An involute stator for a scroll compressor, characterized in that: A seal (3) with a lip is installed on the end face of the involute stator disk (1-1) of the involute stator (1); the lip (3-1) of the seal (3) contacts the sealing surface between the involute stator disk (1-1) and the involute rotor (2); a pressure surface (3-4) is provided on the seal (3) near the lip (3-1); the purpose of the pressure surface (3-4) is to pressurize the pressure surface (3-4) in the process of increasing air pressure so that the lip (3-1) is always in contact with the sealing surface.

2. The involute stator of the scroll compressor according to claim 1, characterized in that: The involute of the involute stator disk (1-1) is divided into an involute (6) at a low-pressure area and an involute (5) at a high-pressure area, and the inclination angle α of the pressure-bearing surface (3-4) of the installed seal (3) at the involute (6) at the low-pressure area is smaller than the inclination angle β of the pressure-bearing surface (3-4) of the installed seal (3) at the involute (5) at the high-pressure area.

3. The involute stator of the scroll compressor according to claim 2, characterized in that: The angle α between the pressure-bearing surface (3-4) of the installed seal (3) at the involute (6) in the low-pressure zone and the sealing surface is in the range of 30 to 45 degrees.

4. The involute stator of the scroll compressor according to claim 2, characterized in that: The angle β between the pressure-bearing surface (3-4) of the installed seal (3) at the involute (5) in the high-pressure zone and the sealing surface is in the range of 50 to 75 degrees.

5. The involute stator of the scroll compressor according to claim 1, characterized in that: The end surface of the involute stator disk (1-1) is provided with a groove (1-2), the bottom of the groove (1-2) is provided with a clamping groove, one end of the seal (3) is hook-shaped and is used to be installed in the clamping groove, one end of the hook-shaped seal (3) is provided with an L-shaped frame (3-2), and an elastic body (3-3) is wrapped around the outside of the frame (3-2).

6. The involute stator of a scroll compressor according to any one of claims 1 to 5, characterized in that: Two sealing members (3) with lips are symmetrically mounted on the end surface of the involute stator disc (1-1).

7. The involute stator of a scroll compressor according to any one of claims 2 to 4, characterized in that: The involute stator disc (1-1) in the low-pressure zone is equipped with a sealing member (3) with a lip edge, and the involute stator disc (1-1) in the high-pressure zone is equipped with two sealing members (3) with lip edges symmetrically.

8. A scroll compressor, characterized in that: An involute stator and an involute rotor (2) of a scroll compressor comprising any one of claims 1-7.

9. The scroll compressor according to claim 8, characterized in that: By changing the axial distance of the involute rotor (2), the lip edge (3-1) of the seal (3) is provided with a pre-pressure amount.

10. The scroll compressor according to claim 9, characterized in that: After assembly, the installation distance X between the end face of the involute stator disk (1-1) of the involute stator (1) and the involute rotor (2) is X=(0.4-0.75)*(L1+L2)+C, where L1 is the length of the lip edge (3-1), L2 is the length of the cross section of the pressure surface (3-4), and C is the axial allowable side clearance of the involute rotor (2).

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