CN-121993412-A - Eccentric mechanism for scroll compressor and scroll compressor

Abstract

The invention provides an eccentric mechanism for a scroll compressor and the scroll compressor, wherein the eccentric mechanism comprises an eccentric adjusting assembly, a balance block and a centering structure, wherein the balance block is of a split type structure, the balance block is provided with a mounting part and a counterweight part connected with the mounting part, the mounting part is sleeved on an eccentric shaft and fixedly mounted with a crankshaft, and the centering structure is sleeved on the eccentric shaft and is in rotary connection with the eccentric shaft. A circumferential limiting structure is arranged between the mounting part and the aligning structure and is used for limiting a circumferential rotation interval of the aligning structure around the eccentric shaft. The centering structure and the balance weight are of split structures, so that the weight of the eccentric mechanism is reduced relative to that of the integrated structure, the generated centrifugal force is reduced, the meshing stability of the movable scroll and the fixed scroll in the compressor is guaranteed, the low-speed meshing stability and the low-speed carrying capacity are guaranteed, and the running range of the scroll compressor is improved.

Inventors

• MOU YINGTAO
• XING GUANDONG
• HUANG ZHIGANG

Assignees

• 上海海立新能源技术有限公司

Dates

Publication Date

20260508

Application Date

20241105

Claims (10)

1. 1. An eccentric mechanism for a scroll compressor, comprising: the crankshaft comprises a main shaft and an eccentric shaft connected with one end of the main shaft; The eccentric adjusting assembly comprises a balance block and a centering structure, the balance block and the centering structure are of split type structures, the balance block is provided with a mounting part and a counterweight part connected with the mounting part, the mounting part is sleeved on the eccentric shaft and fixedly mounted with the crankshaft, and the centering structure is sleeved on the eccentric shaft and is in rotary connection with the eccentric shaft; the installation part is positioned between the main shaft and the aligning structure along the axial direction of the eccentric shaft, a circumferential limiting structure is arranged between the installation part and the aligning structure, and the circumferential limiting structure is used for limiting a circumferential rotation interval of the aligning structure around the eccentric shaft.
2. 2. The eccentric mechanism for a scroll compressor as recited in claim 1, wherein said centering structure is a clearance fit with said eccentric shaft.
3. 3. An eccentric mechanism for a scroll compressor as recited in claim 1, wherein, In the installation department with in the aligning structure along the first terminal surface and the second terminal surface of the relative setting of axial of eccentric shaft, first terminal surface is provided with along the axial backstop piece of eccentric shaft, the second terminal surface be provided with backstop piece complex backstop groove, backstop groove is followed the both sides lateral wall of eccentric shaft circumference limit the circumference rotation interval, the backstop piece is located the backstop inslot.
4. 4. The eccentric mechanism for a scroll compressor as recited in claim 3, wherein said first end surface is disposed on said mounting portion and said second end surface is disposed on said centering structure.
5. 5. The eccentric mechanism for a scroll compressor as recited in claim 4, wherein an oil return hole penetrating said centering structure in said axial direction is provided in said second end surface.
6. 6. An eccentric mechanism for a scroll compressor as recited in claim 4, wherein an axial projection is provided at said first end face for abutting in said axial direction with a bearing that is sleeved outside said centering structure.
7. 7. The eccentric mechanism for a scroll compressor as recited in claim 6, wherein said axial projection is arcuate extending circumferentially along said eccentric shaft central axis, said centering structure being located inboard of said arcuate axial projection.
8. 8. The eccentric mechanism for a scroll compressor as claimed in claim 1, wherein the mounting portion has a through hole, the mounting portion is mounted with the main shaft by a connection member, and the connection member passes through the through hole and is fixedly mounted with the main shaft.
9. 9. The eccentric mechanism for a scroll compressor as recited in claim 8, wherein an escape groove is formed in an outer circumferential surface of said centering structure, said escape groove being truncated in a second end surface along an axial direction of said centering structure, said second end surface being an end of said centering structure along an axial direction thereof near said mounting portion, said escape groove being for providing a mounting space when said connecting member is mounted.
10. 10. A scroll compressor comprising an eccentric mechanism for a scroll compressor as claimed in any one of claims 1 to 9.

Description

Eccentric mechanism for scroll compressor and scroll compressor Technical Field The invention relates to the technical field of refrigeration equipment, in particular to an eccentric mechanism for a scroll compressor and the scroll compressor. Background At present, a scroll compressor is a positive displacement compression compressor, a compression part consists of an movable scroll and a fixed scroll, and the working principle is that the relative revolution motion of the movable scroll and the fixed scroll is utilized to form continuous change of a closed volume, so that the purpose of compressing gas is realized. However, if the movable scroll and the fixed scroll cannot be stably engaged when the compressor is operated at a low rotational speed, internal leakage occurs, which may cause the performance of the compressor to be low and the exhaust temperature to be high, and the operation range of the compressor to be affected. Therefore, achieving stable engagement of the movable scroll and the fixed scroll is one factor in increasing the operating range of the scroll compressor. It should be noted that the information disclosed in the foregoing background section is only for enhancement of understanding of the background of the invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention Aiming at the problems in the prior art, the invention aims to provide an eccentric mechanism for a scroll compressor and the scroll compressor, which overcome the difficulties in the prior art and can solve the problem of the reduction of the operation range of the compressor. A first aspect of the present disclosure provides an eccentric mechanism for a scroll compressor, comprising: the crankshaft comprises a main shaft and an eccentric shaft connected with one end of the main shaft; The eccentric adjusting assembly comprises a balance block and a centering structure, the balance block and the centering structure are of split type structures, the balance block is provided with a mounting part and a counterweight part connected with the mounting part, the mounting part is sleeved on the eccentric shaft and fixedly mounted with the crankshaft, and the centering structure is sleeved on the eccentric shaft and is in rotary connection with the eccentric shaft; the installation part is positioned between the main shaft and the aligning structure along the axial direction of the eccentric shaft, a circumferential limiting structure is arranged between the installation part and the aligning structure, and the circumferential limiting structure is used for limiting a circumferential rotation interval of the aligning structure around the eccentric shaft. In an alternative embodiment, the aligning structure is in clearance fit with the eccentric shaft. In an alternative embodiment, in a first end face and a second end face of the mounting portion and the aligning structure, which are arranged opposite to each other along the axial direction of the eccentric shaft, the first end face is provided with a stop block along the axial direction of the eccentric shaft, the second end face is provided with a stop groove matched with the stop block, the stop groove defines the circumferential rotation interval along two side walls of the eccentric shaft in the circumferential direction, and the stop block is positioned in the stop groove. In an alternative embodiment, the first end surface is disposed on the mounting portion, and the second end surface is disposed on the aligning structure. In an alternative embodiment, an oil return hole penetrating through the aligning structure along the axial direction is arranged on the second end face. In an alternative embodiment, an axial projection is provided at the radially outer edge of the first end face, the axial projection being intended to abut the bearing inner ring in the axial direction. In an alternative embodiment, the axial projection is arc-shaped extending in the circumferential direction of the eccentric shaft, and the arc-shaped axial projection faces the aligning structure in the radial direction of the eccentric shaft. In an alternative embodiment, the mounting part is provided with a through hole, the mounting part and the main shaft are mounted through a connecting piece, and the connecting piece passes through the through hole and is fixedly mounted with the main shaft. In an alternative embodiment, an avoidance groove is formed in the outer circumferential surface of the aligning structure, the avoidance groove is cut off from the second end face along the axial direction of the aligning structure, the second end face is one end, close to the mounting portion, of the aligning structure along the axial direction of the aligning structure, and the avoidance groove is used for providing a mounting space when the connecting piece is mounted. A second aspect of the present discl