阅读说明：本技术 一种涡旋压缩机的双背压腔结构 (Double back pressure cavity structure of scroll compressor ) 是由 林楚辉 李拥军 师海峰 林嘉鹏 林佳佳 林佳敏 林嘉鑫 于 2020-12-11 设计创作，主要内容包括：本发明涉及一种涡旋压缩机的双背压腔结构,包括机壳、轴承座、曲轴、轴承座盖板、动涡旋盖板、动涡旋和静涡旋,轴承座与轴承座盖板之间形成高背压腔,动涡旋左侧安装动涡旋盖板,动涡旋盖板位于轴承座盖板一侧,动涡旋盖板与动涡旋之间形成中间背压腔,高背压腔通过高背压孔与心部压缩腔相通,高背压腔的高背压压力来自于涡旋心部压缩腔即为排气压力,而中间背压腔通过中间背压孔与中间压缩腔相通,中间背压腔的中间背压压力来自于涡旋中间压缩腔,动涡旋浮动力同时受高背压腔和中间背压腔的影响,浮动力可调节范围宽,压缩机整个运转范围具有合理背压力,性能得到提升且运行工况能效高。(The invention relates to a double back pressure cavity structure of a scroll compressor, which comprises a shell, a bearing seat, a crankshaft, a bearing seat cover plate, a movable scroll and a static scroll, wherein a high back pressure cavity is formed between the bearing seat and the bearing seat cover plate, the movable scroll cover plate is arranged on the left side of the movable scroll, the movable scroll cover plate is positioned on one side of the bearing seat cover plate, a middle back pressure cavity is formed between the movable scroll cover plate and the movable scroll, the high back pressure cavity is communicated with a core compression cavity through a high back pressure hole, the high back pressure of the high back pressure cavity is the exhaust pressure from the scroll core compression cavity, the middle back pressure cavity is communicated with the middle compression cavity through a middle back pressure hole, the middle back pressure of the middle back pressure cavity is from the scroll middle compression cavity, the floating force of the movable scroll is simultaneously influenced by the high back pressure cavity and the middle back pressure cavity, the, the performance is promoted and the operating condition energy efficiency is high.)

1. The utility model provides a two back pressure chamber structures of scroll compressor which characterized in that: the scroll compressor comprises a housing, the bearing frame, the bent axle, the bearing frame apron, move the vortex apron, move vortex and quiet vortex, casing one end installation bearing frame, the inside suit bent axle of bearing frame, the bent axle stretches into the casing internal connection and moves the vortex, bearing frame one side installation bearing frame apron, form high back pressure chamber between bearing frame and the bearing frame apron, move the vortex apron in the installation of vortex left side, it is located bearing frame apron one side to move the vortex apron, move the vortex apron and move and form middle back pressure chamber between the vortex, it forms the core compression chamber to move vortex right side meshing quiet vortex, middle compression chamber, it is equipped with the high back pressure hole to move the vortex, middle back pressure hole, the high back pressure chamber communicates with each other through high back pressure hole and core compression chamber, middle back pressure chamber communicates with each other.

2. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: the movable vortex is meshed with the fixed vortex to form an external compression cavity, an intermediate compression cavity and a core compression cavity from outside to center, and refrigerant gas is continuously compressed along with the rotation of the movable vortex and then is discharged from an exhaust hole of the fixed vortex after sequentially passing through the external compression cavity, the intermediate compression cavity and the core compression cavity.

3. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: the bearing seat cover plate is provided with a first sealing ring, and the O-shaped ring and the first sealing ring are matched with each other to seal the high back pressure cavity.

4. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: and a second sealing ring and a third sealing ring are arranged on one side of the movable vortex cover plate, the diameter of the second sealing ring is larger than that of the third sealing ring, and the second sealing ring and the third sealing ring are matched with each other to seal the middle back pressure cavity.

5. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: the bearing seat is provided with a first positioning pin for mounting a bearing seat cover plate.

6. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: the movable vortex cover plate is provided with a second positioning pin for mounting the movable vortex.

7. The dual back pressure chamber structure of a scroll compressor of claim 1, wherein: the high back pressure hole is arranged in the center of the movable vortex, and the middle back pressure hole is arranged in the middle of the movable vortex.

Technical Field

The invention relates to the field of scroll compressors, in particular to a double back pressure cavity structure of a scroll compressor.

Background

The back pressure structure of the scroll compressor is related to whether the compressor can work normally or not, the existing automotive compressor generally adopts a single back pressure cavity dynamic scroll floating technology and has a structure as shown in figures 1 and 2, a back pressure hole 01 is formed in the position of a dynamic scroll, high-pressure exhaust is introduced into a back pressure cavity through the back pressure hole to provide sealing force for lifting the dynamic scroll upwards, and sealing between dynamic and static scroll surfaces in the operation process of the compressor is ensured; under the condition of high pressure, the exhaust compressor for the compressor to work is high, the pressure of a back pressure cavity of the movable scroll rises along with the rise of the pressure, the axial attaching force of the movable scroll is increased, the friction loss is increased, and the energy efficiency of the compressor is reduced.

Disclosure of Invention

Aiming at the defects of a single back pressure structure of a scroll compressor in the prior art, the invention provides a double back pressure cavity structure of the scroll compressor, and the specific technical scheme is as follows:

the utility model provides a scroll compressor's two back pressure chamber structures, which comprises a housing, the bearing frame, the bent axle, the bearing frame apron, move the vortex apron, move vortex and quiet vortex, casing one end installation bearing frame, the inside suit bent axle of bearing frame, the bent axle stretches into the casing internal connection and moves the vortex, bearing frame one side installation bearing frame apron, form high back pressure chamber between bearing frame and the bearing frame apron, move the vortex apron in the installation of vortex left side, it is located bearing frame apron one side to move the vortex apron, move the vortex apron and move and form middle back pressure chamber between the vortex, it forms the heart compression chamber to move the quiet vortex of vortex right side meshing, middle compression chamber, it is equipped with the high back pressure hole to move the vortex, middle back pressure hole, the high back pressure chamber communicates with each other through high back pressure hole and heart compression chamber, middle back pressure.

As a preferred embodiment of the present invention, the movable scroll engages with the fixed scroll to form an outer compression cavity, an intermediate compression cavity, and a center compression cavity from outside to center, and refrigerant gas is continuously compressed along with the rotation of the movable scroll, and is sequentially discharged from the exhaust hole of the fixed scroll after passing through the outer compression cavity, the intermediate compression cavity, and the center compression cavity.

As a preferable scheme of the invention, one side of the bearing seat is provided with an O-shaped ring, the O-shaped ring is positioned between the bearing seat and a bearing seat cover plate, the inner side of the bearing seat cover plate is provided with a first sealing ring, and the O-shaped ring and the first sealing ring are matched with each other to seal the high back pressure cavity.

As a preferable scheme of the invention, one side of the movable vortex cover plate is provided with a second sealing ring and a third sealing ring, the diameter of the second sealing ring is larger than that of the third sealing ring, and the second sealing ring and the third sealing ring are matched with each other to seal the middle back pressure cavity.

In a preferred embodiment of the present invention, the bearing seat is provided with a first positioning pin for mounting a bearing seat cover plate.

As a preferable scheme of the invention, the movable vortex cover plate is provided with a second positioning pin for installing the movable vortex.

In a preferred embodiment of the present invention, the high back pressure hole is provided at a central position of the orbiting scroll, and the middle back pressure hole is provided at a middle position of the orbiting scroll.

The invention has the beneficial effects that: the high back pressure cavity is communicated with the core compression cavity through a high back pressure hole, the high back pressure of the high back pressure cavity is from the vortex core compression cavity and is exhaust pressure, the middle back pressure cavity is communicated with the middle compression cavity through a middle back pressure hole, the middle back pressure of the middle back pressure cavity is from the vortex middle compression cavity, the middle back pressure is between the suction pressure and the exhaust pressure after certain compression, when the working condition of the compressor is changed, the middle back pressure is automatically adjusted along with the change of the suction pressure of the compressor, so that the adjustment of the pressure of the middle back pressure cavity is realized, the floating force of the dynamic vortex is simultaneously influenced by the high back pressure cavity and the middle back pressure cavity, the adjustable range of the floating force is wide, the whole running range of the compressor has reasonable back pressure, the performance is improved, and the running efficiency is high.

Drawings

FIG. 1 is a cross-sectional view of a prior art structure;

FIG. 2 is a perspective view of a prior art orbiting scroll;

FIG. 3 is a structural sectional view of the compressor of the present invention;

FIG. 4 is a perspective view of the bearing seat, bearing seat cover plate, orbiting scroll of the present invention in combination;

FIG. 5 is a perspective view of the orbiting scroll of the present invention viewed from the back;

FIG. 6 is a cross-sectional view of the orbiting scroll of the present invention;

fig. 7 is a sectional view of the orbiting scroll and the non-orbiting scroll of the present invention in combination.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in figures 3-7, a double back pressure cavity structure of a scroll compressor comprises a casing 1, a bearing seat 2, a crankshaft 3, a bearing seat cover plate 4, a movable scroll cover plate 5, a movable scroll 6 and a fixed scroll 7, wherein the bearing seat 2 is installed at one end of the casing 1, the crankshaft 3 is sleeved inside the bearing seat 2, the crankshaft 3 extends into the casing 1 to be connected with the movable scroll 6, the bearing seat cover plate 4, the movable scroll cover plate 5, the movable scroll 6 and the fixed scroll 7 are all installed in the casing, the bearing seat cover plate 4 is installed at one side of the bearing seat 2, a high back pressure cavity 8 is formed between the bearing seat 2 and the bearing seat cover plate 4, the movable scroll cover plate 5 is installed at the left side of the movable scroll 6, the movable scroll cover plate 5 is positioned at one side of the bearing seat cover plate 4, a middle back pressure cavity 9 is formed between the movable scroll cover plate 5 and the movable scroll 6, the right side, And the middle back pressure hole 62 is used for communicating the high back pressure cavity 8 with the heart compression cavity 10 through the high back pressure hole 61, and the middle back pressure cavity 9 is communicated with the middle compression cavity 11 through the middle back pressure hole 62.

Specifically, the movable scroll 6 is meshed with the fixed scroll 7 to form an outer compression cavity 12, an intermediate compression cavity 11 and a core compression cavity 10 from outside to center, refrigerant gas is continuously compressed along with the rotation of the movable scroll 6 and then sequentially passes through the outer compression cavity 12, the intermediate compression cavity 11 and the core compression cavity 10 and then is discharged from an exhaust hole 71 of the fixed scroll 7, the exhaust hole 71 of the fixed scroll 7 faces the core compression cavity 10, the high back pressure of the high back pressure cavity 8 is from the scroll core compression cavity 10, so that the high back pressure is equal to exhaust pressure, the intermediate back pressure of the intermediate back pressure cavity is between suction pressure and exhaust pressure after certain compression, the suction pressure is the pressure at the outer compression cavity 12, when the working condition of the compressor is changed, the intermediate back pressure is automatically adjusted along with the change of the suction pressure of the compressor, so as to realize the adjustment of the pressure of the intermediate back pressure cavity 9, the high back pressure hole 61 is provided at the center of the orbiting scroll 6, and the middle back pressure hole 62 is provided at the middle of the orbiting scroll. .

Specifically, bearing frame 2 one side installation O type circle 13, O type circle 13 is located between bearing frame 2 and the bearing frame apron 4, the inboard first sealing washer 14 of installation of bearing frame apron 4, O type circle 13, first sealing washer 14 is mutually supported and is sealed high back pressure chamber 8, guarantee that there is not gas leakage except that the high back pressure hole 61 department high back pressure chamber 8 all the other positions, and move 5 side-mounting second sealing washers 15 of vortex apron and third sealing washer 16, second sealing washer 15 diameter is greater than the 16 diameters of third sealing washer, second sealing washer 15, back pressure chamber 9 in the middle of third sealing washer 16 mutually supported and seals, guarantee that there is not gas leakage except that the rest positions of back pressure chamber 9 in the middle of middle back pressure hole 62 department.

Specifically, the bearing frame 2 is provided with a first positioning pin 21 for installing the bearing frame cover plate 4, the bearing frame cover plate 4 is provided with a pin hole matched with the first positioning pin 21, the first positioning pin 21 is inserted into the pin hole to realize the installation of the bearing frame cover plate 4 on one side of the bearing frame 2, in addition, the movable scroll cover plate 5 is provided with a second positioning pin 51 for installing the movable scroll 6, the movable scroll 6 is provided with a pin hole matched with the second positioning pin 51, and the second positioning pin 51 is inserted into the pin hole to realize the installation of the movable scroll cover plate 5 on the left side of the movable scroll 6.

Specifically, an adjusting ring pin 52 is arranged at the back of the movable scroll cover plate 5, an adjusting ring mounting hole 41 is arranged on the bearing seat cover plate 4, and the adjusting ring mounting hole 41 is in clearance fit with the adjusting ring pin 52 to ensure that the movable scroll axially and freely floats.

The above description is for the purpose of describing the invention in more detail with reference to specific preferred embodiments, and it should not be construed that the embodiments of the invention are limited to those described herein, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.