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CN-116892517-B - Oil supply device for scroll compressor

CN116892517BCN 116892517 BCN116892517 BCN 116892517BCN-116892517-B

Abstract

The invention discloses an oil supply device for a scroll compressor, which comprises: the main shaft is provided with an oil duct which penetrates through two ends of the main shaft; the movable vortex is rotationally arranged at the upper end of the main shaft through a driving bearing; the upper bearing seat is sleeved on the upper part of the main shaft through a main bearing, the movable vortex is positioned above the upper bearing seat, a cavity is formed in the upper bearing seat, and an oil passing hole is formed in the upper end of the upper bearing seat; the oil cup is sleeved on the main shaft, the oil cup is positioned in the cavity, the opening of the oil cup faces upwards, the oil passing hole is positioned above the oil cup, the oil passing hole is communicated with the inner side wall of the oil cup and the thrust surface of the upper bearing seat, and the lower end of the driving bearing stretches into the oil cup. The back of the vortex is moved in better lubrication of this scheme, reduces the wearing and tearing of the back of moving the vortex and the thrust face of bolster, improves scroll compressor's reliability.

Inventors

  • LIU JINGHUI
  • CHU CHENGGUO
  • XU TAOTAO
  • WANG PENG

Assignees

  • 加西贝拉压缩机有限公司

Dates

Publication Date
20260508
Application Date
20230731

Claims (8)

  1. 1. An oil supply device for a scroll compressor, comprising: The main shaft (1) is provided with an oil duct (1.1), and the oil duct penetrates through two ends of the main shaft; The movable vortex (2) is rotationally arranged at the upper end of the main shaft through a driving bearing (3); The upper bearing seat (4) is sleeved on the upper part of the main shaft through a main bearing, the movable vortex is positioned above the upper bearing seat, a cavity (4.1) is formed in the upper bearing seat, and an oil passing hole (4.2) is formed in the upper end of the upper bearing seat; The oil cup (5) is sleeved on the main shaft, the oil cup is positioned in the cavity, the opening of the oil cup faces upwards, the oil passing hole is positioned above the oil cup, the oil passing hole is communicated with the inner side wall of the oil cup and the thrust surface of the upper bearing seat, and the lower end of the driving bearing stretches into the oil cup; the oil cup is characterized in that a convex rib (5.1) extending along the radial direction of the oil cup is arranged at the bottom end of the inner wall of the oil cup, the edge of the upper end of the oil cup is inwards bent to form a bending part, a through hole (5.2) is formed in the bending part, and the through hole is located below the oil passing hole.
  2. 2. The oil supply apparatus for a scroll compressor as claimed in claim 1, wherein the radius of the opening at the upper end of the oil cup is smaller than the radius of the oil passing hole.
  3. 3. The oil supply apparatus for a scroll compressor according to claim 1, wherein the ribs are circumferentially distributed according to a central axis of the oil cup.
  4. 4. The oil supply apparatus for a scroll compressor according to claim 1, wherein the through holes are circumferentially distributed according to a central axis of the oil cup.
  5. 5. An oil supply apparatus for a scroll compressor according to claim 2, 3 or 4, wherein the oil cup is fixed to a side wall of the main shaft by bolts.
  6. 6. The oil supply device for a scroll compressor according to claim 5, wherein the upper bearing housing comprises an upper bearing housing body (4.3) and a cover plate (4.4), the upper bearing housing body is opened upwards, the cover plate is positioned at the opening of the upper bearing housing body, the oil passing hole is positioned on the cover plate, an oil overflow hole is arranged on the side wall of the lower part of the upper bearing housing body, and the driving bearing penetrates through the oil passing hole and stretches into the oil cup.
  7. 7. The oil supply device for a scroll compressor according to claim 6, wherein the movable scroll comprises a movable scroll base plate (2.1) and a driving shaft bearing seat (2.2) arranged below the movable scroll base plate, the upper end of the main shaft is rotatably arranged in the driving shaft bearing seat through a driving bearing, and oil grooves (2.3) extending along the radial direction of the driving shaft bearing seat are arranged on the lower end surface of the movable scroll base plate and are circumferentially distributed according to the central axis of the driving shaft bearing seat.
  8. 8. The oil supply apparatus for a scroll compressor according to claim 2,3 or 4, wherein the oil passage is eccentrically provided, and an angle between a central axis of the oil passage and a central axis of the main shaft becomes gradually larger from bottom to top.

Description

Oil supply device for scroll compressor Technical Field The invention relates to the technical field of compressors, in particular to an oil supply device for a scroll compressor. Background Scroll compressors are one of the mainstream compressor types in the current refrigeration and air conditioning fields, and have very high refrigeration efficiency and low noise and vibration levels, in addition to their excellent reliability, compared to conventional piston compressors, making them popular for customers in applications. In order to ensure stable operation of the scroll compressor, each friction surface of the scroll compressor must ensure sufficient lubrication, and since an oil supply channel of the scroll compressor is usually arranged in a driving main shaft, centrifugal force of an eccentric hole is used for supplying oil to a bottom bearing, a main bearing and a driving bearing, oil supply between the back surface of an movable scroll and a thrust surface is difficult, and especially for a large-displacement scroll compressor, the axial force of the scroll exceeds ten thousand newtons, and even higher, abrasion of the back surface of the movable scroll and the thrust surface is easily caused, so that the reliability of the compressor is affected. For example, chinese patent publication No. CN107559203A, publication No. 2018, no. 01 and No. 09, named as "oil supply device and scroll compressor", comprises an oil reservoir provided with an oil storage cavity, an oil outlet channel, an oil return channel and an oil supply channel both communicating with the oil storage cavity, a valve for opening or closing the oil supply channel, and an oil pump connected with the oil outlet channel. The oil supply device can achieve the effect of stable oil supply in various states of the scroll compressor, prevent the oil shortage of the compressor, realize effective oil supply lubrication of various friction of the compressor, and improve the reliability of the scroll compressor and the performance of an air conditioner. The prior art has the defects that the oil supply between the back surface and the thrust surface of the movable vortex of the prior vortex compressor is difficult, and the abrasion of the back surface and the thrust surface of the movable vortex is easy to be caused for the vortex compressor with large displacement, thereby influencing the reliability of the vortex compressor. Disclosure of Invention The invention aims to solve the problem that the back surface and the thrust surface of the movable vortex are difficult to supply oil between the back surface and the thrust surface of the movable vortex of the conventional vortex compressor, and the abrasion of the back surface and the thrust surface of the movable vortex is easy to cause for the vortex compressor with large displacement, so that the reliability of the vortex compressor is affected. In order to achieve the above purpose, the present invention adopts the following technical scheme: The oil supply device for the scroll compressor comprises a main shaft, an upper bearing seat, an oil cup sleeve, an oil cup opening, a driving bearing, a thrust surface and a driving bearing, wherein the oil passage is arranged on the main shaft and penetrates through two ends of the main shaft, the driving vortex is arranged at the upper end of the main shaft through a driving bearing in a rotating mode, the upper bearing seat is arranged at the upper part of the main shaft through a main bearing sleeve, the driving vortex is arranged above the upper bearing seat, a cavity is arranged in the upper bearing seat, the upper end of the upper bearing seat is provided with an oil passing hole, the oil cup is sleeved on the main shaft and is arranged in the cavity, the oil passing hole is arranged above the oil cup, the oil passing hole is communicated with the inner side wall of the oil cup and the thrust surface of the upper bearing seat, and the lower end of the driving bearing extends into the oil cup. In this scheme a lubricating oil supply device for scroll compressor, oil cup collect the lubricating oil that flows from drive bearing department, drive the oil cup rotatory through the main shaft, lubricating oil is by centrifugal force through the back of oil hole whipping to moving the vortex, flows into between the thrust face of the back and the bolster of moving the vortex, makes the better back of lubrication moving the vortex of lubricating oil, reduces the wearing and tearing of the back of moving the vortex and bolster of moving the vortex, improves scroll compressor's reliability. Compared with the current common oil supply modes of oil applying by the upper counterweight and oil carrying by the gas, the oil supply quantity is easier to ensure. Preferably, the radius of the opening at the upper end of the oil cup is smaller than the radius of the oil passing hole. The lubricating oil is ensured to swing to the back surface of the movable vortex