CN211598948U

CN211598948U - Crankshaft for refrigeration compressor

Info

Publication number: CN211598948U
Application number: CN201922444338.7U
Authority: CN
Inventors: 周正红; 曹永新; 言伟
Original assignee: Jiangsu Baixue Electric Appliances Co Ltd
Current assignee: Jiangsu Baixue Electric Appliances Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-29
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a bent axle for refrigeration compressor, including main shaft portion and for the eccentric portion that the axial lead of main shaft portion eccentric arrangement, the inside axial inlet port that is equipped with of main shaft portion, be equipped with the heliciform oil groove on the main shaft portion lateral surface, a tip and the axial inlet port of heliciform oil groove are linked together through a radial oil outlet, offer the first order exhaust hole and the second level exhaust hole that are linked together with the axial inlet port on the bent axle, first order exhaust hole and second level exhaust hole all are located the downside of radial oil outlet and the second level exhaust hole is compared in the first order exhaust hole and is more close to radial oil outlet. The present case is through two exhaust holes of arranging about the design on the bent axle for the refrigerant of dissolving in refrigerator oil can more effectually separate the refrigerant from refrigerator oil when upwards moving together along with refrigerator oil, thereby makes the oil film of bent axle loading surface formation more reliable, thereby is favorable to improving lubricated effect more.

Description

Crankshaft for refrigeration compressor

Technical Field

The utility model belongs to the compressor field, especially a bent axle for refrigeration compressor.

Background

The compressor is widely applied to the field of refrigeration household appliances, is the heart of a refrigeration system, and consists of a shell, a cylinder body, a crankshaft, a piston, a connecting rod and a motor. The refrigeration compressor drives a crankshaft-connecting rod motion mechanism through a motor, and then drives a piston-cylinder unit to compress a refrigerant. The crankshaft of the compressor has an oil pumping function, so that on one hand, a crankshaft-connecting rod-piston motion mechanism can be lubricated, and the motion mechanism is prevented from being stuck; on the other hand, the piston-cylinder unit can be cooled. The bottom of compressor housing is equipped with refrigerating machine oil, and when the bent axle was rotatory, oil pump system was under the effect of centrifugal force, and refrigerating machine oil moves upward through the inside axial inlet port of main shaft portion along with the bent axle, exports through the communicating radial oil outlet with axial oil inlet through-hole again, then upwards carries the eccentric portion position with refrigerating oil and realizes lubricating the eccentric portion surface through arranging the spiral oil groove on the bent axle surface.

In the working process of the refrigerating system, part of refrigerant is dissolved in the compressor refrigerating machine oil, when the crankshaft rotates, the oil pump system moves upwards along the axial oil inlet through hole together with the refrigerating machine oil dissolved in the refrigerating machine oil under the action of centrifugal force, when the refrigerating machine oil dissolved with the refrigerant passes through the bearing surface of the crankshaft, the refrigerant is volatile to cause oil film damage, and the lubricating effect is reduced.

According to the traditional design of the crankshaft, only a single exhaust hole is arranged above the liquid level, only a small part of gas dissolved in a refrigerant is exhausted through the exhaust hole, and a large part of gas still rises to the bearing surface of the crankshaft along with refrigerating machine oil, so that an oil film is easy to damage, and lubrication is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a lubricated effectual bent axle for compressor.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a crankshaft for a refrigeration compressor comprises a main shaft portion and an eccentric portion which is eccentrically arranged relative to the axial lead of the main shaft portion, wherein an axial oil inlet hole is formed in the main shaft portion, a spiral oil groove is formed in the outer side face of the main shaft portion, one end of the spiral oil groove is communicated with the axial oil inlet hole through a radial oil outlet hole, a first-stage exhaust hole and a second-stage exhaust hole which are communicated with the axial oil inlet hole are formed in the crankshaft, the first-stage exhaust hole and the second-stage exhaust hole are located on the lower side of the radial oil outlet hole, and the second-stage exhaust hole is closer to the radial oil outlet hole than the first-stage exhaust hole.

In the above technical solution, preferably, the main shaft portion includes a lower shaft section and an upper shaft section, the lower shaft section is a tapered structure with a large upper portion and a small lower portion, the upper shaft section is a columnar structure, the first-stage exhaust hole is located at the lower shaft section, and the second-stage exhaust hole is located at the upper shaft section.

In the above technical solution, preferably, the first-stage exhaust hole is located at a middle upper position of the lower shaft section, and an axial line of the first-stage exhaust hole is perpendicular to an axial line of the main shaft portion.

In the above technical solution, preferably, the second stage exhaust hole is adjacent to the radial oil outlet hole, and an axial line of the second stage exhaust hole is perpendicular to an axial line of the main shaft portion.

In the above technical scheme, preferably, the first-stage exhaust hole and the second-stage exhaust hole are opposite to the orifice direction of the radial oil outlet hole.

In the above technical solution, preferably, an included angle of 1-3 ° is formed between a center line of the axial oil inlet hole and an axial line of the main shaft portion.

The utility model discloses simple structure through two exhaust holes of arranging about the design on the bent axle for the refrigerant of dissolving in refrigerator oil can more effectually separate the refrigerant from refrigerator oil when the upward movement together along with refrigerator oil, thereby makes the oil film that bent axle loading end surface formed more reliable, thereby is favorable to improving lubricated effect more.

Drawings

Fig. 1 is a schematic view (partially perspective) of the crankshaft structure of the present invention;

fig. 2 is the working principle diagram of the crankshaft of the present invention.

100. A crankshaft; 10. a main shaft portion; 11. a shaft axis; 20. an eccentric portion; 101. a lower shaft section; 102. an upper shaft section; 12. an axial oil inlet hole; 121. a centerline; 13. a helical oil groove; 14. a first radial oil outlet hole; 15. a second radial oil outlet hole; 21. a third radial oil outlet hole; 16. a first stage exhaust vent; 17. a second stage exhaust vent; 161. a centerline; 171. the axis line.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.

As shown in fig. 1, a crankshaft 100 for a refrigeration compressor includes a main shaft 10 and an eccentric portion 20 arranged eccentrically with respect to a shaft axis 11 of the main shaft 10. The main shaft 10 includes a lower shaft section 101 and an upper shaft section 102, the lower shaft section 101 is a tapered structure with a large upper portion and a small lower portion, and the upper shaft section 102 is a cylindrical structure. The lower portion of the lower shaft section 101 is connected to an oil pump system 200.

The main shaft portion 10 is provided with an axial oil inlet hole 12 inside, and the axial oil inlet hole 12 is distributed on both the lower shaft section 101 and the upper shaft section 102. The central line 121 of the axial oil inlet hole 12 and the axial line 11 of the main shaft part 10 form an included angle of 1-3 degrees. The main shaft 10 is provided with a spiral oil groove 13 on the outer side surface of the upper shaft section 102, the lower end of the spiral oil groove 13 is communicated with the axial oil inlet 12 through a first radial oil outlet 14, the lower end of the spiral oil groove 13 is communicated with a second radial oil outlet 15, and the second radial oil outlet 15 is communicated with a channel (not shown) which is distributed in the upper shaft section 102 and the eccentric section 20 at the same time and is communicated with a third radial oil outlet 21 on the eccentric section 20.

The crankshaft 100 is provided with a first-stage exhaust hole 16 and a second-stage exhaust hole 17 which are communicated with the axial oil inlet hole 12, the first-stage exhaust hole 16 is positioned at the middle upper part of the lower shaft section 101, and the second-stage exhaust hole 17 is positioned at the upper shaft section 102. The center line 161 of the first stage exhaust hole 16 is perpendicular to the axial line 11 of the main shaft part 10, the center line 171 of the second stage exhaust hole 17 is perpendicular to the axial line 11 of the main shaft part 10, the first stage exhaust hole 16 and the second stage exhaust hole 17 are both located at the lower side of the first radial oil outlet hole 14, and the second stage exhaust hole 17 is closer to the first radial oil outlet hole 14 than the first stage exhaust hole 16, in this case, the second stage exhaust hole 17 is located at the position close to the first radial oil outlet hole 14, and the opening directions of the first stage exhaust hole 16 and the second stage exhaust hole 17 are opposite to the opening direction of the first radial oil outlet hole 14.

An oil supply path for supplying the refrigerating machine oil upward is formed by the axial oil inlet hole 12, the radial oil outlet holes, and the spiral oil groove 13, thereby achieving a function of lubricating the crankshaft 100.

As shown in fig. 2, the refrigerating machine oil 300 is disposed at the bottom of the compressor housing 200, when the crankshaft 100 with the dual exhaust hole structure works, the first-stage exhaust hole 16 is disposed at a certain height on the liquid level, the second-stage exhaust hole 17 is disposed at a certain distance from the first radial oil outlet hole 14, the crankshaft 100 rotates, the refrigerating machine oil 300 moves upward along the axial oil inlet hole 12 under the action of centrifugal force, and during the upward movement of the refrigerating machine oil 300, a part of the refrigerant 400 dissolved in the refrigerating machine oil 300 is removed through the first-stage exhaust hole 16 and then removed through the second-stage exhaust hole 17, so that gas-liquid separation is more effectively achieved, more reliable oil film on the bearing surface of the crankshaft is facilitated, and the lubricating effect is.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The crankshaft for the refrigeration compressor comprises a main shaft part and an eccentric part eccentrically arranged relative to the axial lead of the main shaft part, wherein an axial oil inlet hole is formed in the main shaft part, a spiral oil groove is formed in the outer side surface of the main shaft part, one end of the spiral oil groove is communicated with the axial oil inlet hole through a radial oil outlet hole, and the crankshaft is characterized in that a first-stage exhaust hole and a second-stage exhaust hole which are communicated with the axial oil inlet hole are formed in the crankshaft, the first-stage exhaust hole and the second-stage exhaust hole are located on the lower side of the radial oil outlet hole, and the second-stage exhaust hole is closer to the radial oil outlet hole than the first-stage exhaust hole.

2. The crankshaft for a refrigerating compressor according to claim 1, wherein the main shaft portion includes a lower shaft section and an upper shaft section, the lower shaft section has a tapered structure with a large upper portion and a small lower portion, the upper shaft section has a cylindrical structure, the first stage exhaust hole is located at the lower shaft section, and the second stage exhaust hole is located at the upper shaft section.

3. The crankshaft for a refrigerant compressor as set forth in claim 2, wherein said first stage discharge hole is located at a middle upper position of said lower shaft section, and an axial center line of said first stage discharge hole is perpendicular to an axial center line of said main shaft section.

4. A crankshaft for a refrigerant compressor according to claim 2, wherein said second stage discharge hole is located adjacent to said radial oil discharge hole, and an axial center line of said second stage discharge hole is perpendicular to an axial center line of said main shaft portion.

5. The crankshaft for a refrigeration compressor according to claim 2, wherein the first stage discharge hole and the second stage discharge hole are opposite to the opening direction of the radial oil outlet hole.

6. The crankshaft for a refrigerating compressor as recited in claim 2, wherein a center line of said axial oil inlet hole forms an angle of 1 to 3 ° with a shaft axis of said main shaft portion.