CN-224200815-U - Radial flexible mechanism of scroll compressor

Abstract

The utility model discloses a radial flexible mechanism of a scroll compressor, which comprises a main shaft, wherein a crankshaft seat is arranged at the output end of the main shaft, an eccentric hole is axially formed in the end part of one end, far away from the main shaft, of the crankshaft seat, a crank pin is fixedly connected to the inside of the eccentric hole, an eccentric shaft sleeve is fixedly sleeved on the outer side of one end, far away from the crankshaft seat, of the crank pin, an eccentric block is fixedly connected to one side of the eccentric shaft sleeve, a limit groove is formed in the outer side of one end, close to the eccentric block, of the crankshaft seat, and an elastic gasket is arranged on the inner side of the limit groove. The utility model fixes the rubber ring on the crankshaft by slotting the outer side of the crankshaft seat on the main shaft, thereby avoiding the collision between the eccentric block and the crankshaft, being beneficial to improving NVH performance, and having buffer for the aligning function and avoiding too strong aligning and rollback due to the addition of the rubber ring, the running of the movable disc of the compressor is more stable, the noise is low, and the NVH performance uniformity is good.

Inventors

• CAO LIANJIE
• HUANG XIAOLAN
• Gan Jiechao
• YANG YANG
• He Chunpei

Assignees

• 浙江威乐新能源压缩机有限公司

Dates

Publication Date

20260505

Application Date

20250523

Claims (5)

1. 1. A radial flexible mechanism of a scroll compressor comprises a main shaft (1) and is characterized in that a crankshaft seat (2) is arranged at the output end of the main shaft (1), an eccentric hole (3) is axially formed in the end part of one end, far away from the main shaft (1), of the crankshaft seat (2), a crank pin (4) is fixedly connected to the inside of the eccentric hole (3), an eccentric shaft sleeve (5) is fixedly sleeved on the outer side of one end, far away from the crankshaft seat (2), of the crank pin (4), an eccentric block (6) is fixedly connected to one side of the eccentric shaft sleeve (5), a limit groove (7) is formed in the outer side of one end, close to the eccentric block (6), of the crankshaft seat (2), and an elastic gasket (8) is arranged on the inner side of the limit groove (7).
2. 2. A radially flexible mechanism of a scroll compressor according to claim 1, characterized in that the inner side of the eccentric mass (6) covers the position of the crankshaft seat (2) where the limit groove (7) is provided.
3. 3. A radially flexible mechanism for a scroll compressor according to claim 1, wherein the thickness of the elastic washer (8) is the sum of the depth of the limit groove (7) and the surface clearance distance of the eccentric mass (6) and the crank carrier (2).
4. 4. A radially flexible mechanism of a scroll compressor according to claim 1, wherein the center of gravity position of the eccentric block (6) and the center of gravity position of the orbiting scroll of the scroll compressor are provided on both sides of the axial center position of the main shaft (1), respectively.
5. 5. A radially flexible mechanism of a scroll compressor according to claim 1, characterized in that said elastic gasket (8) is a high temperature resistant fluororubber gasket on the market.

Description

Radial flexible mechanism of scroll compressor Technical Field The utility model relates to the technical field of scroll compressors, in particular to a radial flexible mechanism of a scroll compressor. Background The flexible mechanism is one of main mechanisms of the scroll compressor, and an eccentric part of the flexible mechanism drives the movable scroll to revolve around the center of the main shaft, so that the movable scroll and the fixed scroll are meshed to realize the periodical change of the closed working volume, and the suction, compression and discharge of gas are realized. Due to the complexity of the scroll profile, unavoidable machining errors and assembly accuracy errors must occur in the actual production process, and the existence of these errors can cause excessive or excessive extrusion of the meshing gap between the side walls of the movable and fixed scrolls. The former aggravates tangential leakage caused by radial clearance passages, and the latter causes severe wear of the scroll and scratches caused by liquid or solid particles in the working chamber, which can seriously affect the working performance of the scroll compressor. Radially flexible sealing arrangements are commonly employed in scroll compressors. The flexible mechanism can enable the distance between the movable vortex disc and the fixed vortex disc in the radial direction to be adjustable, namely fine adjustment of the turning radius is achieved. The movable vortex disk can always realize the mutual engagement between the two vortex bodies with the minimum radial clearance under the action of centrifugal inertia force, so that the gas leakage between the high compression cavity and the low compression cavity caused by the leakage channel is reduced, and the problems can be effectively avoided. The principle diagram of the radial flexible mechanism is shown in fig. 1, and the whole mechanism consists of a main shaft with a crank pin and an eccentric block structure with a balancing weight at the edge. Wherein the point A is the center of the main shaft (namely the fixed scroll), the point B is the center of the crank pin, the point C is the center of the eccentric block, the eccentric block is concentric with the movable scroll, and the point C is the center of the movable scroll. The three points form a dynamic movement flexible triangle, wherein LAB is the value of the crank radius on the main shaft, the structures of the main shaft and the eccentric block are fixed, namely LAB and LBC are fixed values, and LAC is a theoretical turning radius value Ror. When the center C of the movable vortex moves circularly in a plane around the center A of the fixed vortex, the turning radius LAC (Ror) changes correspondingly (the eccentric block rotates around the O point). However, the structure has two defects in the application process, namely, when the scroll compressor is started, the crankshaft rotates preferentially and the eccentric block rotates in a lagging way, the outer edge of the crankshaft can strike the inner ring of the counterweight below the eccentric block, so that impact sound can be brought when the compressor is started, NVH performance is poor when the structure is applied to an automobile compressor, customer complaints are caused, and in the operation process of the compressor, the situation that certain load is overweight or impurities are mixed in refrigerant can be encountered, at the moment, the eccentric block rotates around the point B, so that the contact between the movable vortex wall surface and the stationary vortex wall surface is broken, and at the same time, the impact between the inner ring of the eccentric block of the counterweight below and the main shaft can be caused, so that abnormal sound is still caused, the NVH performance is still influenced, and further improvement space is provided. Disclosure of utility model The utility model aims to at least solve one of the technical problems in the prior art, and provides a radial flexible mechanism of a scroll compressor, which can avoid the impact between a counterweight inner ring of an eccentric block and a main shaft while not changing the radial flexibility, improve NVH performance and solve the problems. In order to achieve the above purpose, a radial flexible mechanism of a scroll compressor is provided, which comprises a main shaft, the output department of main shaft is provided with the bent axle seat, the eccentric hole has been seted up to the one end tip axial that the main shaft was kept away from to the bent axle seat, the inside fixedly connected with crank pin in eccentric hole, the crank pin has kept away from the one end outside of bent axle seat and has fixedly cup jointed eccentric sleeve, one side fixedly connected with eccentric block of eccentric sleeve, the limit groove has been seted up in the one end outside that the bent axle seat is close to the eccentric block, the inboard of limit groove is provided wit