CN108343585B - Reciprocating piston type refrigerator compressor crankshaft - Google Patents
Reciprocating piston type refrigerator compressor crankshaft Download PDFInfo
- Publication number
- CN108343585B CN108343585B CN201710045832.9A CN201710045832A CN108343585B CN 108343585 B CN108343585 B CN 108343585B CN 201710045832 A CN201710045832 A CN 201710045832A CN 108343585 B CN108343585 B CN 108343585B
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- crankshaft
- oil
- main shaft
- boss
- reciprocating piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/0276—Lubrication characterised by the compressor type the pump being of the reciprocating piston type, e.g. oscillating, free-piston compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/06—Crankshafts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Compressor (AREA)
Abstract
The invention discloses a reciprocating piston type refrigerator compressor crankshaft, which is respectively provided with a crankshaft small head, a balance part and a main shaft from top to bottom; the crankshaft small head is installed on the balance portion, the main shaft is installed below the balance portion, an oil inlet hole, an oil path groove, a first oil outlet hole and an air outlet hole are formed in the outer wall of the main shaft from top to bottom, an oil suction hole is formed in the center of the bottom of the main shaft, an oil path is formed in the main shaft, a boss is arranged between the crankshaft small head and the balance portion, the bottom surface of the crankshaft small head is connected with the top surface of the boss, a second oil outlet hole is further formed in the top surface of the boss, and the bottom surface of the boss. According to the invention, the oil outlet hole of the crankshaft is arranged on the boss on the balance part, the wear resistance of the surface of the small end of the crankshaft is improved in a special surface treatment mode, the size of the small end of the crankshaft is reduced, the weight of the crankshaft is lightened, a compressor applying the crankshaft has smaller size and lighter weight, the vibration generated by inertia force is reduced, the noise of the compressor is reduced, and the operation of the compressor is more stable.
Description
Technical Field
The invention belongs to the technical field of refrigerator compressors, and particularly relates to a reciprocating piston type refrigerator compressor crankshaft.
Background
The quality of the refrigeration quality of a refrigerator mainly looks at the effect of a compressor, and the refrigerator compressor has two specifications of a reciprocating type and a rotating type. In japan, the rotary compressor has taken up over 30% of the market, while the reciprocating refrigerator compressor has taken up about 87% of the market in our country.
The crankshaft is one of the most important moving parts of reciprocating piston compressor, and it inputs all effective power from motor rotor and changes its rotation into reciprocating motion of piston, and every time the piston reciprocates in the cylinder, i.e. every time the crankshaft rotates a circle, the processes of suction, compression, exhaust and expansion must be successively implemented, and under the drive of motor it can be continuously run, and the piston can be continuously reciprocated in the cylinder, so that said four processes can be repeatedly implemented by compressor so as to implement compression and delivery of gas.
In general, a crankshaft should satisfy the following requirements:
(1) has sufficient fatigue strength to withstand the cyclic bending and torsional loads acting thereon, and therefore must be selected with reasonable structure and process to improve its fatigue strength.
(2) Has enough rigidity to prevent serious abrasion caused by bending deformation of the crankshaft during operation.
(3) Proper main journal and crankshaft small head diameter are selected to ensure that the bearing specific pressure and sliding friction speed are low and reliable lubrication is ensured.
In addition, the requirements for the dimensional processing precision and roughness of the crankshaft, the cylindricity of the journal and the parallelism of the main journal and the small end of the crankshaft are strict, so that the normal operation of the compressor is ensured, the abnormal abrasion is avoided, and the mechanical noise is reduced.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides the crankshaft of the reciprocating piston type refrigerator compressor, wherein the oil outlet hole of the crankshaft is arranged on the balance part, and the volume of the small end of the crankshaft is reduced, so that the crankshaft applied compressor has smaller noise and more stable operation; meanwhile, the small end of the crankshaft is subjected to special surface treatment, so that the wear resistance of the crankshaft is improved.
The invention is realized by the following technical scheme:
the crankshaft of the reciprocating piston type refrigerator compressor is respectively provided with a crankshaft small head, a balance part and a main shaft from top to bottom; the crankshaft small head is installed on the balance portion, the main shaft is installed below the balance portion, an oil inlet hole, an oil path groove, a first oil outlet hole and an air outlet hole are formed in the outer wall of the main shaft from top to bottom, an oil suction hole is formed in the center of the bottom of the main shaft, an oil path is formed in the main shaft, a boss is arranged between the crankshaft small head and the balance portion, the bottom surface of the crankshaft small head is connected with the top surface of the boss, a second oil outlet hole is further formed in the top surface of the boss, and the bottom surface of the boss.
The small end of the crankshaft is eccentrically arranged on the main shaft, and the surface of the small end of the crankshaft is provided with a wear-resistant coating which is prefabricated by adopting a chemical spraying surface treatment method.
The axial-to-radial ratio of the small end of the crankshaft to the main shaft is 1:6-1: 3.
The outer diameter of the boss is smaller than or equal to that of the balance part.
The outer diameter of the main shaft is smaller than that of the balance part.
The oil circuit is divided into three parts from bottom to top, and the first part is arranged in the main shaft and is a part between the oil suction hole and the first oil outlet hole; the second part is an oil path groove which is connected between the first oil outlet and the oil inlet and is arranged on the outer wall of the main shaft in the spiral direction; the third part sets up inside intercommunication inlet port and the second oil outlet of main shaft.
The air outlet is arranged on the outer wall of the lower end of the main shaft and communicated with the first part of the oil way.
When the lubricating oil lubricating device works, lubricating oil is sucked from the oil suction hole at the bottom of the main shaft, under the action of centrifugal force, the lubricating oil moves upwards along the oil path and passes through the first part of the oil path, when the lubricating oil flows to the first oil outlet, the lubricating oil is thrown out from the oil outlet to lubricate corresponding parts, then the lubricating oil continuously flows upwards along the oil path groove, enters the third part of the oil path from the oil inlet, is finally thrown out from the second oil outlet to lubricate corresponding parts around the lubricating oil, and gas existing in the oil path is discharged from the air outlet.
Compared with the prior art, the invention has the beneficial effects that:
(1) the boss is arranged between the small end of the crankshaft and the balance part, so that the size of the balance part is reduced, and the weight of the crankshaft is lightened;
(2) according to the invention, the oil outlet of the crankshaft is arranged on the boss on the balance part, so that the volume of the small end of the crankshaft is reduced, and the weight of the crankshaft is reduced;
(3) the wear-resistant coating is arranged on the surface of the small end of the crankshaft, so that the wear resistance of the surface of the small end of the crankshaft is improved;
in conclusion, the compressor using the invention has smaller volume and lighter weight, reduces the vibration generated by inertia force, reduces the noise of the compressor and enables the compressor to operate more stably.
Drawings
FIG. 1 is a schematic structural diagram of one side of a crankshaft of a reciprocating piston refrigerator compressor;
FIG. 2 is a schematic structural diagram of the other side of a crankshaft of a reciprocating piston refrigerator compressor;
FIG. 3 is a cross-sectional view of a reciprocating piston refrigerator compressor crankshaft;
FIG. 4 is a bottom view of a reciprocating piston refrigerator compressor crankshaft;
wherein: 1. a small end of the crankshaft; 2. a second oil outlet hole; 3. a balancing section; 4. an oil inlet hole; 5. an oil path groove; 6. a main shaft; 7. an air outlet; 8. a first oil outlet hole; 9. an oil suction hole; 10. and (4) a boss.
Detailed Description
The technical scheme of the invention is further illustrated by the following specific examples:
referring to fig. 1 to 4 showing an embodiment of a crankshaft of a reciprocating piston type refrigerator compressor according to the present invention, it can be seen that the present invention includes a small crankshaft head 1, a second oil outlet 2, a balance portion 3, an oil inlet 4, an oil path groove 5, a main shaft 6, an air outlet 7, a first oil outlet 8, an oil suction hole 9 and a boss 10. The crankshaft is respectively provided with a crankshaft small head 1, a balance part 3 and a main shaft 6 from top to bottom; install bent axle microcephaly 1 above the balancing portion 3, install main shaft 6 below the balancing portion 3, 6 outer walls top-down of main shaft are provided with inlet port 4, oil circuit groove 5, first oil outlet 8, venthole 7, and 6 bottom central points of main shaft put and are provided with oil absorption hole 9, are provided with the oil circuit on the main shaft 6 (not marking in the picture), its characterized in that: a boss 10 is arranged between the small crankshaft head 1 and the balance part 3, the bottom surface of the small crankshaft head 1 is connected with the top surface of the boss 10, a second oil outlet hole 2 is further formed in the top surface of the boss 10, the bottom surface of the boss 10 is connected with the top surface of the balance part 3, and the bottom surface of the balance part 3 is connected with a main shaft 6.
The small crankshaft head 1 is eccentrically arranged on the boss 10, has smaller volume and lighter weight compared with the existing small crankshaft head, and is subjected to special surface treatment to increase the wear resistance, and the surface treatment method is chemical spraying, and other surface treatment methods for increasing the wear resistance of the surface can be also utilized.
The axial-to-radial ratio of the small head 1 of the crankshaft to the main shaft 6 is 1: 5.
The outer diameter of the boss 10 is smaller than that of the balance part 3.
The outer diameter of the main shaft 6 is smaller than that of the balancing part 3.
The oil path (not shown in the figure) is divided into three parts from bottom to top, wherein the first part is arranged in the main shaft 6 and is a part between the oil suction hole 9 and the first oil outlet hole 8; the second part is an oil way groove 5 connected between the first oil outlet 8 and the oil inlet 4, and the oil way groove 5 is arranged on the outer wall of the main shaft 6 in the spiral direction; the third part is arranged inside the main shaft 6 and communicated with the oil inlet hole 4 and the second oil outlet hole 2.
And the air outlet 7 is arranged on the outer wall of the lower end of the main shaft 6 and is communicated with the first part of the oil way.
When the lubricating oil lubricating device works, lubricating oil is sucked from the oil suction hole at the bottom of the main shaft, under the action of centrifugal force, the lubricating oil moves upwards along the oil path and passes through the first part of the oil path, when the lubricating oil flows to the first oil outlet, the lubricating oil is thrown out from the oil outlet to lubricate corresponding parts, then the lubricating oil continuously flows upwards along the oil path groove, enters the third part of the oil path from the oil inlet, is finally thrown out from the second oil outlet to lubricate corresponding parts around the lubricating oil, and gas existing in the oil path is discharged from the air outlet.
The boss is arranged between the small end of the crankshaft and the balance part, so that the volume of the balance part is reduced, the oil outlet hole of the crankshaft is arranged on the boss on the balance part, the volume of the small end of the crankshaft is reduced, and the wear resistance of the surface of the small end of the crankshaft is improved by arranging the wear-resistant coating on the surface of the small end of the crankshaft, so that a compressor applying the crankshaft has smaller volume and lighter weight, the vibration generated by inertia force is reduced, the noise of the compressor is reduced, and the operation of the compressor is more stable.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (5)
1. Reciprocating piston refrigerator compressor bent axle, its characterized in that: the crankshaft is respectively provided with a crankshaft small head, a balance part and a main shaft from top to bottom; the crankshaft small head is arranged on the balancing part, the main shaft is arranged below the balancing part, an oil inlet hole, an oil path groove, a first oil outlet hole and an air outlet hole are formed in the outer wall of the main shaft from top to bottom, an oil suction hole is formed in the central position of the bottom of the main shaft, an oil path is formed in the main shaft, a boss is arranged between the crankshaft small head and the balancing part, the bottom surface of the crankshaft small head is connected with the top surface of the boss, a second oil outlet hole is formed in the top surface of the boss, and the bottom surface of the boss; the axial-to-radial ratio of the small end of the crankshaft to the main shaft is 1:6-1: 3; the small end of the crankshaft is eccentrically arranged on the boss, and the surface of the small end of the crankshaft is provided with a wear-resistant coating.
2. The reciprocating piston refrigerator compressor crankshaft of claim 1, wherein: the outer diameter of the boss is smaller than or equal to that of the balance part.
3. The reciprocating piston refrigerator compressor crankshaft of claim 1, wherein: the outer diameter of the main shaft is smaller than that of the balance part.
4. The reciprocating piston refrigerator compressor crankshaft of claim 1, wherein: the oil circuit is divided into three parts from bottom to top, and the first part is arranged in the main shaft and is a part between the oil suction hole and the first oil outlet hole; the second part is an oil way groove connected between the first oil outlet and the oil inlet, and the oil way groove is arranged on the outer wall of the main shaft in the spiral direction; the third part is arranged in the main shaft and communicated with the oil inlet hole and the second oil outlet hole.
5. The reciprocating piston refrigerator compressor crankshaft of claim 4, wherein: the air outlet is arranged on the outer wall of the lower end of the main shaft and communicated with the first part of the oil way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045832.9A CN108343585B (en) | 2017-01-22 | 2017-01-22 | Reciprocating piston type refrigerator compressor crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045832.9A CN108343585B (en) | 2017-01-22 | 2017-01-22 | Reciprocating piston type refrigerator compressor crankshaft |
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| Publication Number | Publication Date |
|---|---|
| CN108343585A CN108343585A (en) | 2018-07-31 |
| CN108343585B true CN108343585B (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710045832.9A Active CN108343585B (en) | 2017-01-22 | 2017-01-22 | Reciprocating piston type refrigerator compressor crankshaft |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009203862A (en) * | 2008-02-27 | 2009-09-10 | Toshiba Carrier Corp | Hermetic electric compressor and refrigerating cycle device |
| CN202001256U (en) * | 2011-04-07 | 2011-10-05 | 芜湖欧宝机电有限公司 | Crankshaft for refrigeration compressor |
| CN102575662A (en) * | 2009-11-18 | 2012-07-11 | Lg电子株式会社 | Compressor |
| CN102628154A (en) * | 2012-04-27 | 2012-08-08 | 赛屋（天津）涂层技术有限公司 | Wear-resistant compressor crankshaft and production method thereof |
| CN102953961A (en) * | 2012-11-29 | 2013-03-06 | 广州万宝集团压缩机有限公司 | Refrigerator compressor and lubricating-oil supplying device |
| CN206555091U (en) * | 2017-01-22 | 2017-10-13 | 王毅 | Reciprocating-piston refrigerator compressor crankshaft |
-
2017
- 2017-01-22 CN CN201710045832.9A patent/CN108343585B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009203862A (en) * | 2008-02-27 | 2009-09-10 | Toshiba Carrier Corp | Hermetic electric compressor and refrigerating cycle device |
| CN102575662A (en) * | 2009-11-18 | 2012-07-11 | Lg电子株式会社 | Compressor |
| CN202001256U (en) * | 2011-04-07 | 2011-10-05 | 芜湖欧宝机电有限公司 | Crankshaft for refrigeration compressor |
| CN102628154A (en) * | 2012-04-27 | 2012-08-08 | 赛屋（天津）涂层技术有限公司 | Wear-resistant compressor crankshaft and production method thereof |
| CN102953961A (en) * | 2012-11-29 | 2013-03-06 | 广州万宝集团压缩机有限公司 | Refrigerator compressor and lubricating-oil supplying device |
| CN206555091U (en) * | 2017-01-22 | 2017-10-13 | 王毅 | Reciprocating-piston refrigerator compressor crankshaft |
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| Publication number | Publication date |
|---|---|
| CN108343585A (en) | 2018-07-31 |
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