CN209976727U

CN209976727U - Self-stabilizing bearing system assembly for refrigeration compressor

Info

Publication number: CN209976727U
Application number: CN201920895722.6U
Authority: CN
Inventors: 孟碧光; 黄强胜; 戴竟雄
Original assignee: Huangshi Dongbei Electrical Appliance Co Ltd
Current assignee: Huangshi Donper Compressor Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-01-21
Anticipated expiration: 2029-06-14

Abstract

The utility model relates to a self-stabilizing bearing system component for a refrigeration compressor, which comprises an upper thrust gasket, a bearing retainer, a middle thrust gasket and a lower thrust gasket, wherein the four thrust gaskets are sequentially sleeved on a long shaft of a crankshaft of the compressor from top to bottom; a circle of arc groove is arranged on the middle thrust washer and used for supporting a bearing roller in the bearing retainer; the utility model discloses can improve compressor crankshaft moving stability, the noise reduction reduces the friction consumption, reduces bent axle wearing and tearing simultaneously, improves the reliability to prevent to go up the offset of thrust pad, and then the cutting bent axle causes bent axle intensity to reduce, the bent axle that wears out.

Description

Self-stabilizing bearing system assembly for refrigeration compressor

Technical Field

The utility model belongs to the technical field of the refrigeration compressor spare part technique and specifically relates to a self stabilization bearing system subassembly for refrigeration compressor.

Background

The bearing system structure of the existing refrigeration compressor comprises an upper thrust washer, a bearing retainer, a thrust stopping washer and a lower thrust washer which are sequentially sleeved on a long shaft of a crankshaft from top to bottom, but the structure has the following defects in use: during the operation of the upper thrust gasket, firstly, the crankshaft is cut to reduce the strength of the crankshaft, and secondly, cuttings can reach the eccentric shaft (matching surface with the connecting rod) along with an oil path of a crankshaft pump to abrade the eccentric shaft until the eccentric shaft is clamped; because the horizontal direction of the upper thrust washer is not supported and limited, the crankshaft is connected and driven by the motor rotor to drive the upper thrust washer (under the action of static friction force and the adhesion force of oil) to rotate. When the centrifugal force of the crankshaft exceeds the stress critical point of the upper thrust washer (in the horizontal direction), a speed difference is generated between the crankshaft and the upper thrust washer, the upper thrust washer slides relative to the contact surface of the crankshaft, the static friction force is changed into sliding friction force, the upper thrust washer deflects in the horizontal direction, and then the crankshaft is cut; in addition because part precision for example cylinder block shaft hole hangs down straightness, bent axle major axis hangs down deviation such as straightness, easily causes bearing pad wearing and tearing and the wearing and tearing between bent axle major axis and the shaft hole cylinder block specifically do: the matching verticality of the crankshaft and the shaft hole of the cylinder seat exceeds the tolerance requirement, the bearing gasket is extruded to cause uneven stress, and the bearing gasket is abraded; the perpendicularity of the eccentric shaft and the long shaft of the crankshaft exceeds the tolerance requirement, the eccentric shaft is assembled with the connecting rod and then is inclined in the shaft hole, and the long shaft of the crankshaft contacts the edge of the shaft hole and abrades the shaft hole in the process of rotating around the center of the shaft hole; in addition, the bearing retainer is not limited in the horizontal direction and is easy to deflect, so that the retainer is deformed under stress, and the performance of the compressor is influenced.

Disclosure of Invention

The utility model aims at providing a self stabilization bearing system subassembly for compressor to above-mentioned condition, this bearing system subassembly can improve compressor crankshaft moving stability, and the noise reduction reduces the friction consumption, reduces bent axle wearing and tearing simultaneously, improves the reliability to prevent to go up the offset of thrust pad, and then the cutting bent axle, cause the bent axle intensity to reduce, wearing and tearing bent axle.

The utility model has the following concrete scheme: a self-stabilizing bearing system assembly for a refrigeration compressor comprises an upper thrust washer, a bearing retainer, a middle thrust washer and a lower thrust washer, wherein the upper thrust washer, the bearing retainer, the middle thrust washer and the lower thrust washer are sequentially sleeved on a long shaft of a crankshaft of the compressor from top to bottom; and a circle of arc groove is arranged on the middle thrust washer and is used for supporting the bearing roller in the bearing retainer and limiting the movement of the bearing roller so as to protect the bearing retainer.

Further, in the utility model discloses in be equipped with the clearance of stepping down between the central hole of going up thrust gasket and the bent axle major axis of compressor.

Further, in the present invention, the radius of the arc of the inverted arc structure is larger than the radius of the bearing roller in the bearing holder.

The utility model discloses following beneficial effect has:

1. by designing a new upper thrust gasket structure, the running stability of the crankshaft of the compressor is effectively improved, meanwhile, the noise is reduced, the friction power consumption is reduced, the abrasion of the crankshaft is reduced, and the running reliability of the crankshaft is improved.

2. Through the inverted arc structure and the abdicating gap on the upper thrust washer, the cutting of the crankshaft caused by the excessive deviation of the upper thrust washer can be prevented, and the conditions of crankshaft strength reduction and crankshaft abrasion are further caused.

3. The middle thrust washer can limit the moving range of the bearing roller, and prevent the bearing roller from moving the bearing to contact the outer wall of the shaft hole to bear force, so that the bearing structure is prevented from being damaged.

Drawings

FIG. 1 is a schematic view of a prior art connection structure of a bearing system at a crankshaft of a refrigeration compressor;

FIG. 2 is a schematic view of a prior art compressor showing a crankshaft bearing system in isolation;

FIG. 3 is a schematic diagram of the overall structure of the present invention;

FIG. 4 is a schematic top view of the structure of FIG. 3;

FIG. 5 is a general schematic view of an upper thrust washer of the present invention;

FIG. 6 is a front view schematic of the arrangement of FIG. 5;

FIG. 7 is a schematic view of the overall structure of the middle bearing retainer of the present invention;

FIG. 8 is a schematic view of the overall structure of the pause pad of the present invention;

fig. 9 is a schematic view of the general structure of the middle and lower thrust washer of the present invention.

In the figure: the thrust bearing comprises a cylinder block 1, a crankshaft long shaft 2, a lower thrust washer 3, a stop thrust washer 4, a bearing retainer 5, an upper thrust washer 6, a crankshaft 7, an inverted arc structure 9, an annular boss 10, an arc groove 11, a bearing roller 12 and a abdicating gap 13.

Detailed Description

Referring to fig. 3-8, the utility model relates to a self-stabilizing bearing system assembly for a refrigeration compressor, which comprises an upper thrust washer 6, a bearing holder 5, a stopping thrust washer 4 and a lower thrust washer 3, wherein the four are sequentially sleeved on a crankshaft long shaft 2 of the compressor from top to bottom, the bottom of the upper thrust washer is provided with a circle of annular boss 10, an inner hole of the annular boss is aligned with the circumference of a central inner hole of the upper thrust washer, a reverse arc structure 9 is arranged between the outer side surface of the annular boss and the bottom plane of the upper thrust washer, and the reverse arc structure is in spacing fit with a bearing roller 12 in the bearing holder; the upper surface of the stopping pad is provided with a circle of arc groove 11 which is used for supporting a bearing roller in the bearing retainer and limiting the movement of the bearing roller so as to protect the bearing retainer.

Further, in this embodiment, an abdicating gap 13 is provided between the central inner hole of the upper thrust washer and the long shaft of the crankshaft of the compressor.

Further, in the present embodiment, the radius of the inverted arc structure is larger than the radius of the bearing roller in the bearing retainer, and the larger radius is only slightly larger, so that the bearing roller can be in good contact with the inverted arc structure.

The scheme in the embodiment is an improvement on the basis of the original bearing system, the whole bearing system structure is sleeved on a long shaft of a compressor crankshaft, the whole crankshaft is arranged on a cylinder block, an annular boss at the bottom of an upper thrust washer is inserted into an inner hole in the middle of a bearing retainer, a bearing roller is tightly pressed on an inverted arc structure, and the lower surface of the bearing roller is arranged in an arc groove on a middle thrust washer for limiting.

The bearing roller is contacted with the inverted arc structure of the upper thrust washer (the principle is the same as that of a train wheel and a train track structure), the upper thrust washer is limited to move left and right, the upper thrust washer is prevented from excessively deviating from the center under the action of centrifugal force to cut a crankshaft, and meanwhile, due to the existence of a yielding gap, the crankshaft can be prevented from being cut to a certain extent; the bearing roller is limited by the arc groove of the middle thrust washer; the middle thrust washer and the lower thrust washer are positioned and supported by the cylinder block; the utility model discloses bearing system can self-balancing adjustment, and restriction bent axle beat finds the steady operation center, improves stability, improves the bent axle eccentric shaft wearing and tearing that probably exist.

When the perpendicularity of the crankshaft and the shaft hole of the cylinder seat exceeds the tolerance, the upper thrust washer can incline by an angle,

the bearing roller is contacted with the upper thrust gasket, and is arranged on the straight part and the inverted arc structure part, and the center of the cylinder hole is superposed with the center of the crankshaft, so that the long shaft of the crankshaft is prevented from being abraded.

Claims

1. The utility model provides a self stabilization bearing system subassembly for compressor, including last thrust gasket, bearing holder, well thrust gasket and thrust gasket down and four top-down suit in proper order on the bent axle major axis of compressor, its characterized in that: the bottom of the upper thrust washer is provided with a circle of annular boss, an inner hole of the annular boss is aligned with the circumferential surface of a central inner hole of the upper thrust washer, an inverted circular arc structure is arranged between the outer side surface of the annular boss and the bottom plane of the upper thrust washer, and the inverted circular arc structure is in limit fit with a bearing roller in the bearing retainer; and a circle of arc groove is arranged on the middle thrust washer and is used for supporting the bearing roller in the bearing retainer and limiting the movement of the bearing roller so as to protect the bearing retainer.

2. A self-stabilizing bearing system assembly for a refrigerant compressor as set forth in claim 1 wherein: and an abdicating gap is arranged between the central inner hole of the upper thrust washer and the crankshaft long shaft of the compressor.

3. A self-stabilizing bearing system assembly for a refrigerant compressor as set forth in claim 1 wherein: the arc radius of the inverted arc structure is larger than the radius of a bearing roller in the bearing retainer.