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CN-117329123-B - Scroll compressor and method for correcting scroll wrap line

CN117329123BCN 117329123 BCN117329123 BCN 117329123BCN-117329123-B

Abstract

The invention relates to the technical field of scroll compressors, and particularly discloses a scroll compressor and a modification method of a scroll wrap profile. The scroll compressor comprises a first clearance formed between a first outer circular arc section and the inner wall of a movable scroll within a preset angle range of rotation of the fixed scroll and the movable scroll before the compression process of the fixed scroll and the movable scroll is finished, a second clearance formed between a second outer circular arc section and the inner wall of the fixed scroll, a third clearance formed between a first center head section and a second inner circular arc section during the exhaust process of the fixed scroll and the movable scroll, and a fourth clearance formed between the second center head section and the first inner circular arc section. The meshing gap of the movable vortex disk and the fixed vortex disk is increased from zero within a certain angle range before the gas compression is finished, so that the problem of meshing interference of the initial position of the arc correction of the tooth head can be solved while the vibration noise is reduced and the energy efficiency ratio is improved, and the service life of the vortex compressor is prolonged.

Inventors

  • ZHANG SONGYUAN

Assignees

  • 上海松芝酷恒新能源技术有限公司

Dates

Publication Date
20260508
Application Date
20231018

Claims (10)

  1. 1. The vortex type compressor comprises a movable vortex disc (200) and a fixed vortex disc (100) which have the same structure and vortex tooth profiles, wherein the fixed vortex disc (100) and the movable vortex disc (200) are arranged in opposite directions, and the vortex type compressor is characterized in that the vortex tooth profiles of the fixed vortex disc (100) comprise a first outer arc section, a first central head section, a first straight line section and a first inner arc section, the first outer arc section, the first central head section, the first straight line section and the first inner arc section are all close to the tooth heads of the fixed vortex disc (100), and the vortex tooth profiles of the movable vortex disc (200) comprise a second outer arc section, a second central head section, a second straight line section and a second inner arc section, and the second outer arc section, the second central head section, the second straight line section and the second inner arc section are all close to the tooth heads of the movable vortex disc (200); Before the compression process of the fixed scroll (100) and the movable scroll (200) is finished, a first gap is formed between the first outer circular arc section and the inner wall of the movable scroll (200) within a preset angle range of rotation of the fixed scroll (100) and the movable scroll (200), and a second gap is formed between the second outer circular arc section and the inner wall of the fixed scroll (100); in the process of exhausting the fixed scroll (100) and the movable scroll (200), a third gap is formed between the first central head section and the second inner circular arc section, and a fourth gap is formed between the second central head section and the first inner circular arc section.
  2. 2. The scroll compressor of claim 1, wherein the predetermined angle is greater than 0 ° and less than or equal to 85 °.
  3. 3. The scroll compressor of claim 1, wherein the first gap and the second gap gradually increase from zero during compression of the fixed scroll (100) and the orbiting scroll (200); The third gap and the fourth gap are gradually increased from the first gap in the process of exhausting the fixed scroll (100) and the movable scroll (200).
  4. 4. The scroll compressor of claim 1, wherein the first gap and the second gap gradually increase from 0mm to 0.18mm during compression of the fixed scroll (100) and the orbiting scroll (200); The third gap and the fourth gap gradually increase from 0.18mm to 0.25mm during the exhaustion of the fixed scroll (100) and the orbiting scroll (200).
  5. 5. The scroll compressor of claim 1, wherein the first gap is equal in size to the second gap and the third gap is equal in size to the fourth gap.
  6. 6. A method of modifying a scroll profile for modifying a fixed scroll (100) and a movable scroll (200) of a scroll compressor according to any one of claims 1 to 5, characterized in that the method of modifying a scroll profile comprises the steps of: S100, drawing a profile diagram of the movable scroll (200) according to a vortex tooth profile equation of the movable scroll (200), wherein the equation of the vortex tooth profile of the movable scroll (200) is as follows: inner wall surface (220) equation: X=Rb*(cos(θ-β)+θ*sin(θ-β)); Y=Rb*(sin(θ-β)-θ*cos(θ-β)); The outer wall (210) equation: X=Rb*(cos(θ+β)+θ*sin(θ+β)); Y=Rb*(sin(θ+β)-θ*cos(θ+β)); Wherein Rb is the radius of a base circle (1), beta is the initial angle of the profile of the outer wall surface (210), and theta is the expansion angle of the vortex tooth profile; S200, taking a starting point K of a central line (230) of a molded line of the outer wall surface (210) and a molded line of the inner wall surface (220) of the movable vortex disk (200) on a base circle (1), and connecting a line segment OK; S300, a tangent line AB of the base circle (1) is taken, the tangent line AB is intersected with the base circle (1) at a point B, the tangent line AB is intersected with a molded line of an inner wall surface (220) of the movable vortex disc (200) at a point A, and the expansion angle of the tangent line AB relative to the line OK is phi 1 ; S400, a tangent line CD of the base circle (1) is taken as a tangent line CD, the tangent line CD intersects with the base circle (1) at a point C and intersects with a molded line of an outer wall surface (210) of the movable vortex disc (200) at a point D, the expansion angle of the tangent line CD relative to the line OK is phi 2 ,Φ 1 -Φ 2 = 180 degrees, and a point D 1 is taken on the tangent line CD; S500, respectively taking a point O 1 、O 2 on the tangent line AB and the tangent line CD 1 , respectively taking O 1 、O 2 as a circle center, taking O 1 A、O 2 D 1 as a radius to draw a circle, and drawing a common tangent line of the two circles, wherein the common tangent line and a molded line of an inner wall surface (220) of the movable vortex disk (200) respectively intersect with a point F 1 、E 1 , a straight line E 1 F 1 is a second straight line segment, an arc line AF 1 is a second inner arc segment, an arc line D 1 E 1 is a second central head segment, wherein O 1 A-O 2 D 1 = R+DeltaL, and R is the rotation radius of the movable vortex disk (200); S600, a tangent GH serving as the base circle (1) is intersected with the base circle (1) at a point G and a molded line of an outer wall surface (210) of the movable vortex disc (200) at a point H, and the expansion angle of the tangent GH relative to the line OK is phi 2 +gamma, wherein gamma is a preset angle; s700, taking a point O 3 on the tangent GH, drawing a circle by taking O 3 as a circle center and taking O 3 H as a radius, enabling the circle to pass through a point D 1 , and enabling an arc HD 1 to be a second outer arc section.
  7. 7. The method of modifying a wrap profile according to claim 6, wherein the method of obtaining the point O 3 is: The line segment HD 1 is connected, and a perpendicular bisector of the line segment HD 1 is used, where an intersection point of the perpendicular bisector and the tangent GH is a point O 3 .
  8. 8. The method for correcting a wrap profile according to claim 6, wherein the method for correcting a wrap profile of the fixed scroll (100) is the same as the method for correcting a wrap profile of the movable scroll (200).
  9. 9. The method of modifying a wrap profile according to claim 6, wherein the DD 1 has a length greater than 0mm and less than or equal to 0.1mm.
  10. 10. The method of modifying a wrap profile according to claim 6, wherein Δl has a length of greater than 0mm and less than or equal to 0.015mm.

Description

Scroll compressor and method for correcting scroll wrap line Technical Field The invention relates to the technical field of scroll compressors, in particular to a scroll compressor and a modification method of a scroll wrap profile. Background Because the compressor matches refrigerating system, application scene and ambient temperature's influence, compressor suction-discharge pressure ratio can fluctuate in great scope, and scroll compressor design pressure ratio is fixed, when actual working compression ratio is greater than or less than design compression ratio, at gas compression end and exhaust chamber UNICOM in the twinkling of an eye, compression chamber and exhaust chamber pressure difference can lead to exhaust chamber pressure fluctuation, increases compressor vibration noise and energy consumption. Chinese patent CN201910382927.9 discloses a scroll type line tooth head structure of a scroll compressor and a correction method thereof, by adopting the correction method, arc correction is performed on the tooth head, and from the initial position of the corrected arc, the meshing gap of the tooth head gradually increases from zero, so that when the compression cavity is communicated with the exhaust cavity, the pressure of the compression cavity and the exhaust cavity is similar or the pressure of the compression cavity and the exhaust cavity is the same, and mechanical noise caused by abrupt pressure change is reduced. However, in the practical application process, the vicinity of the initial position of the correction arc is located in a gas high-temperature high-pressure area, and the zero meshing gap enables the meshing point of the tooth head and the vicinity of the initial position of the correction arc to slightly interfere, so that the tooth head is worn, and the service life of the scroll compressor is affected. Therefore, there is a need to provide a scroll compressor and a method for correcting a scroll wrap profile to solve the above-mentioned problems. Disclosure of Invention According to one aspect of the invention, the invention provides a scroll compressor, which increases the meshing gap of a movable scroll and a fixed scroll from zero within a certain angle range before the end of gas compression, reduces vibration noise, improves energy efficiency ratio, solves the problem of meshing interference of a tooth head part in correcting an arc starting position, and prolongs the service life of the scroll compressor. In order to achieve the above purpose, the invention adopts the following technical scheme: The vortex compressor comprises a movable vortex disc and a fixed vortex disc which have the same structure and vortex tooth-shaped lines, wherein the fixed vortex disc and the movable vortex disc are arranged in opposite directions, the vortex tooth-shaped lines of the fixed vortex disc comprise a first outer circular arc section, a first central head section, a first straight line section and a first inner circular arc section, and the first outer circular arc section, the first central head section, the first straight line section and the first inner circular arc section are all close to the tooth heads of the fixed vortex disc; the vortex tooth profile of the movable vortex disk comprises a second outer arc section, a second central head section, a second straight line section and a second inner arc section, wherein the second outer arc section, the second central head section, the second straight line section and the second inner arc section are all close to the tooth head of the movable vortex disk; Before the compression process of the fixed scroll and the movable scroll is finished, a first gap is formed between the first outer circular arc section and the inner wall of the movable scroll within a preset angle range of rotation of the fixed scroll and the movable scroll, and a second gap is formed between the second outer circular arc section and the inner wall of the fixed scroll; in the process of exhausting the fixed scroll and the movable scroll, a third gap is formed between the first central head section and the second inner circular arc section, and a fourth gap is formed between the second central head section and the first inner circular arc section. Optionally, the preset angle is greater than 0 ° and less than or equal to 85 °. Optionally, the first gap and the second gap gradually increase from zero during the compression of the fixed scroll and the movable scroll; the third gap and the fourth gap are gradually increased from the first gap in the process of exhausting the static vortex disc and the movable vortex disc. Optionally, the first gap and the second gap gradually increase from 0mm to 0.18mm in the process of compressing the fixed scroll and the movable scroll; The third gap and the fourth gap gradually increase from 0.18mm to 0.25mm in the process of exhausting the fixed scroll and the movable scroll. Optionally, the size of the first gap is equal to t