CN112377514B - Batch manufacturing method for compressor crankshaft blanks - Google Patents
Batch manufacturing method for compressor crankshaft blanks Download PDFInfo
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- CN112377514B CN112377514B CN202011253685.2A CN202011253685A CN112377514B CN 112377514 B CN112377514 B CN 112377514B CN 202011253685 A CN202011253685 A CN 202011253685A CN 112377514 B CN112377514 B CN 112377514B
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- shaft
- eccentric sleeve
- short shaft
- short
- long
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 52
- 238000003466 welding Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000012827 research and development Methods 0.000 abstract description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 10
- 238000004663 powder metallurgy Methods 0.000 description 10
- 238000010791 quenching Methods 0.000 description 10
- 230000000171 quenching effect Effects 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000000641 cold extrusion Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000005121 nitriding Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000012163 sequencing technique Methods 0.000 description 2
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
Classifications
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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
- F16C3/10—Crankshafts assembled of several parts, e.g. by welding by crimping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/601—Shaft flexion
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a crankshaft blank of a rotary compressor, a crankshaft blank assembling method and a crankshaft blank batch manufacturing method, and belongs to the technical field of liquid variable capacity machinery. The method solves the problem of high manufacturing cost of the crankshaft blank of the existing rotary compressor. The crankshaft blank of the compressor is divided into a long shaft, a short shaft and an eccentric sleeve in a reasonable way, one end part of the short shaft is arranged in a shaft hole of the eccentric sleeve in a penetrating way, and the short shaft is tightly matched with the eccentric sleeve; the long shaft and the short shaft are coaxially arranged, and one end part of the long shaft is fixedly connected with one end part of the short shaft and one end part of the long shaft is fixedly connected with the eccentric sleeve by welding. The long shaft, the short shaft and the eccentric sleeve can flexibly select materials and manufacturing processes according to technical requirements to prepare parts with various technical requirements; when crankshafts with different technical requirements are manufactured, proper technical parts can be selected for assembly according to requirements, so that research and development cost and manufacturing cost are reduced, and manufacturing efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of liquid positive-displacement machines, and relates to a rotary compressor, in particular to a batch manufacturing method of crankshaft blanks of the rotary compressor.
Background
The rotary compressor is particularly suitable for small-sized air conditioners, and particularly has wider application in household air conditioners. With the development of society, sales of rotary compressors and air conditioners are increasing year by year; the rotary compressor has improved environment friendship, energy saving, consumption reducing and other technological requirements, and the low-fluorine and fluorine-free refrigerant is used in air conditioner compressor and air conditioner for limited period.
The working pressure of the compressor adopting the refrigerants such as R134a, R407c and R410a is increased by 60 percent compared with that of the compressor adopting the refrigerant R22, namely the working pressure is increased from 16kg/cm to 26-28 kg/cm. The variable frequency compressor has a higher rotating speed than the fixed frequency compressor, and the speed change is frequent. The pressure of the suction inlet of the compressor of the carbon dioxide heat pump water heater reaches 3.5-4Mpa, and the pressure of the outlet reaches 8-12Mpa; the inlet and outlet pressure of the compressor of the carbon dioxide heat pump water heater is 5-10 times of that of the traditional refrigerant rotary compressor. In a word, the novel rotary compressor has higher technical requirements on strength, wear resistance, fatigue resistance, service life and the like of a crankshaft.
At present, the manufacturing enterprises of the compressor accessories set up the optimal manufacturing process according to the technical requirements of the compressor crankshafts, such as the manufacturing processes of the crankshafts of the fixed-frequency compressor crankshaft, the variable-frequency compressor crankshaft, the carbon dioxide heat pump water heater compressor crankshaft and the like are different, and the adopted equipment is not identical. In actual production, the compressor accessory production enterprises have the problems of larger and larger production area, more and more production equipment, higher input cost and poorer equipment utilization rate balance, and the problems further cause that the cost of the compressor parts cannot be reduced and the production efficiency cannot be improved.
Disclosure of Invention
The invention provides a batch manufacturing method of compressor crankshaft blanks, which aims to solve the technical problem of how to provide a manufacturing method of compressor crankshaft blanks which is suitable for industrialized batch production and can produce crankshaft blanks with different technical requirements, and preferably, the manufacturing cost of the crankshaft blanks can be reduced.
The technical problems to be solved by the invention can be realized by the following technical proposal: a compressor crankshaft blank consists of a hollow long shaft, a solid short shaft and an eccentric sleeve with a shaft hole, wherein one end part of the short shaft is arranged in the shaft hole of the eccentric sleeve in a penetrating way, and the short shaft is tightly matched with the eccentric sleeve; the long shaft and the short shaft are coaxially arranged, and one end part of the long shaft is fixedly connected with one end part of the short shaft and one end part of the long shaft is fixedly connected with the eccentric sleeve by welding.
A compressor crankshaft blank refers to an unmachined part. The long shaft adopts a hollow structure, so that a center hole is not required to be drilled in the long shaft in subsequent processing, and the processing efficiency is improved and the processing cost is reduced. The short shaft adopts a solid structure, so that the strength of the short shaft is higher, and deformation generated in the tight fit process of the short shaft and the eccentric sleeve is avoided as much as possible. Splitting a compressor crankshaft blank into a long shaft, a short shaft and an eccentric sleeve, so that all parts are manufactured independently; and each part can be manufactured with a plurality of technical requirements.
In the compressor crankshaft blank, the interference fit of the short shaft and the eccentric sleeve is 0.02mm-0.04mm.
In the above compressor crankshaft blank, the eccentric sleeve has a weight-removing hole therein.
In the compressor crankshaft blank, the short shaft is provided with a spline section, and the spline section is in spline fit with the eccentric sleeve.
In the above-mentioned compressor crankshaft blank, the short shaft is further provided with a welding connection section, the welding connection section is located in the long shaft cavity, and the welding connection section and the long shaft are fixedly connected together by welding.
In the compressor crankshaft blank, the joint between the short shaft and the eccentric sleeve is opposite to the end face of the long shaft.
In the above compressor crankshaft blank, the welding also secures the stub shaft and eccentric sleeve together.
The assembling method of the crankshaft blank of the compressor is sequentially carried out according to the following steps, firstly, the short shaft and the shaft hole of the eccentric sleeve are arranged coaxially, then the short shaft and the eccentric sleeve are pressed together, and the short shaft penetrates through the shaft hole of the eccentric sleeve; secondly, the long shaft and the short shaft are arranged coaxially, and then one end part of the long shaft, the short shaft and the eccentric sleeve are welded together, so that the compressor crankshaft blank is manufactured.
The short shaft and the eccentric sleeve are pressed together during assembly, so that friction welding operation is facilitated, and one end of the long shaft can be welded with the short shaft and the eccentric sleeve through one-time friction welding. The crankshaft blank of the compressor is split into the long shaft, the short shaft and the eccentric sleeve, so that the compressor is assembled by adopting a mature tight fit press fitting and friction welding process, the manufacturing difficulty is further reduced, the assembly cost is reduced, and the assembly efficiency and the assembly quality consistency are improved.
The method for manufacturing the compressor crankshaft blanks in batches sequentially comprises the following steps of firstly, manufacturing a long shaft, a short shaft and an eccentric sleeve in batches without sequencing, wherein at least one of the three parts of the long shaft, the short shaft and the eccentric sleeve is used for manufacturing a plurality of batches, and the technical requirements of the parts of the batches are not identical;
secondly, selecting the long shaft, the short shaft and the eccentric sleeve, wherein at least one of the long shaft, the short shaft and the eccentric sleeve is selected from a plurality of batches, and the technical requirements of the selected parts are not identical; the assembling method is adopted for assembling, and the compressor crankshaft blank with various technical requirements is obtained.
The same part is usually manufactured in multiple batches and the technical requirements of the parts are not identical, i.e. the same part has multiple technical requirements; for example, an eccentric sleeve which is not nitrided and sintered by powder metallurgy and an eccentric sleeve which is nitrided and sintered by powder metallurgy have two technical requirements.
The long shaft, the short shaft and the eccentric sleeve which are made of proper materials and by proper processes are generally selected according to the technical requirements of the compressor crankshaft blank when the compressor crankshaft blank is assembled. For example, the long shaft and the short shaft of a crankshaft of a normal-regulation frequency rotary compressor are all made of low-carbon steel, and an eccentric sleeve is sintered by powder metallurgy; the long shaft and the short shaft of the variable frequency rotary compressor crankshaft are made of low carbon steel, quenching treatment is carried out on the long shaft and the short shaft, and the eccentric sleeve is sintered by powder metallurgy; the long shaft and the short shaft of the compressor crankshaft of the carbon dioxide heat pump water heater are made of medium carbon steel, quenching treatment is carried out on the long shaft and the short shaft, the eccentric sleeve is sintered by adopting powder metallurgy, and nitriding treatment is carried out on the eccentric sleeve.
In general, the same part can be applied to crankshafts with different technical requirements, such as an eccentric sleeve formed by sintering can be applied to a crankshaft of a normal-frequency rotary compressor and a crankshaft of a variable-frequency rotary compressor; the same parts in the crankshafts are required to be manufactured in most of the same processes, for example, the eccentric sleeve which is not nitrided can be applied to the crankshaft of the variable-frequency rotary compressor, and the eccentric sleeve which is nitrided can be applied to the crankshaft of the compressor of the carbon dioxide heat pump water heater.
Compared with the prior art, the crankshaft blank of the compressor is divided into three parts of a long shaft, a short shaft and an eccentric sleeve in a whole reasonably, so that the three parts can flexibly select materials and manufacturing processes according to technical requirements, and further, the crankshaft is ensured to meet the technical requirements, and parts with various technical requirements can be manufactured. More importantly, the parts with various technical requirements are usually only different in materials or different in heat treatment process, so that most of manufacturing procedures of the same parts are the same.
For the manufacturing enterprises which simultaneously produce crankshafts with different technical requirements, the long shaft, the short shaft and the eccentric sleeve with different technical requirements can be flexibly selected for assembly according to the technical requirements of the crankshafts, the crankshafts are reasonably tested to meet the technical requirements, and parts with the lowest manufacturing cost can be selected, so that the manufacturing cost of the crankshafts is reduced.
The compressor crankshaft blank is produced by adopting the batch manufacturing method, so that the research and development cost is obviously reduced, the production flow is simplified, and the research and development and production efficiency is improved; and improving the utilization rate of the equipment and the use balance of the equipment. In summary, the compressor crankshaft blank structure and the compressor crankshaft blank batch manufacturing method not only ensure that a manufacturing enterprise can produce crankshafts with different technical requirements, but also ensure that the crankshafts meet the technical requirements, reduce the manufacturing cost of the crankshafts and improve the production efficiency of the crankshafts.
Drawings
Fig. 1 is a schematic perspective view of a compressor crankshaft blank.
Fig. 2 is an exploded view of a compressor crankshaft blank.
Fig. 3 is a schematic perspective view of the state where the stub shaft and the eccentric sleeve are press-fitted together.
FIG. 4 is a schematic cross-sectional structural view of a compressor crankshaft blank.
In the figure, 1, the long axis; 2. a short shaft; 2a, welding the connecting section; 2b, spline section; 2c, a main shaft section; 3. an eccentric sleeve; 3a, a shaft hole; 3b, removing the duplicate hole; 4. a gap.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, a compressor crankshaft blank is composed of a hollow long shaft 1, a solid short shaft 2 and an eccentric sleeve 3.
The short shaft 2 is provided with a welding connection section 2a, a spline section 2b and a main shaft section 2c from one end to the other end, and the spline section 2b is provided with spline teeth. The eccentric sleeve 3 is internally provided with a shaft hole 3a, the shaft hole 3a deviates from the axis of the eccentric sleeve 3, and the side surface of the shaft hole 3a is provided with a spline groove. One end of the short shaft 2 is arranged in the shaft hole 3a of the eccentric sleeve 3 in a penetrating way; specifically, a spline section 2b of the short shaft 2 is positioned in the shaft hole 3a, spline teeth are embedded into spline grooves of the shaft hole 3a, and the short shaft 2 is tightly matched with the eccentric sleeve 3; the interference is 0.02 mm-0.04 mm. The short shaft 2 and the eccentric sleeve 3 are assembled by adopting a mature press-fitting process, the connecting structure between the short shaft 2 and the eccentric sleeve 3 has the advantages of high connecting strength, capability of ensuring that the eccentric sleeve 3 cannot circumferentially rotate relative to the short shaft 2, high assembly efficiency, low assembly cost and the like.
The eccentric sleeve 3 is also internally provided with a weight removing hole 3b, so that the eccentric weight can be reduced, further the eccentric moment and noise of a crankshaft during the operation of the compressor are reduced, the performance of the compressor is improved, and the energy consumption of the compressor is reduced.
The long shaft 1 and the short shaft 2 are arranged coaxially, and one end part of the long shaft 1 and one end part of the short shaft 2 are fixedly connected by welding. The welding connection section 2a is positioned in the cavity of the long shaft 1, a gap 4 is formed between the outer side surface of the welding connection section 2a and the inner side surface of the long shaft 1, and the gap 4 is filled with molten liquid generated by welding, so that the welding connection area between the long shaft 1 and the short shaft 2 is increased, and the connection strength between the long shaft 1 and the short shaft 2 is improved. The one end of the long shaft 1 is fixedly connected with the eccentric sleeve 3 by welding, so that the installation firmness of the long shaft 1 is improved, and the axial movement between the short shaft 2 and the eccentric sleeve 3 is avoided.
As shown in fig. 1 to 4, a method for assembling a compressor crankshaft blank is sequentially performed according to the following sequential steps, wherein, firstly, a short shaft 2 and a shaft hole 3a of an eccentric sleeve 3 are coaxially arranged, then the short shaft 2 and the eccentric sleeve 3 are pressed together, and the short shaft 2 passes through the shaft hole 3a of the eccentric sleeve 3; until the end face of the spline section 2b is flush with the end face of the eccentric sleeve 3. Secondly, the long shaft 1 and the short shaft 2 are arranged coaxially, and the joint between the short shaft 2 and the eccentric sleeve 3 is ensured to be opposite to the end face of the long shaft 1 by controlling the diameter of the shaft hole 3a; and then, welding one end part of the long shaft 1, the short shaft 2 and the eccentric sleeve 3 together by adopting friction welding, so as to prepare the compressor crankshaft blank. In the friction welding process, materials of the long shaft 1, the short shaft 2 and the eccentric sleeve 3 are melted, and the melt not only ensures that the end part of the spline section 2b and the end part of the eccentric sleeve 3 are fixedly connected with the long shaft, but also ensures that the short shaft 2 and the eccentric sleeve 3 are fixedly connected together; the molten liquid is filled into the gap 4 between the welding connection section 2a and the long shaft 1, and the welding connection section 2a and the long shaft 1 are fixedly connected together by solidifying the molten liquid; thereby remarkably improving the connection strength between the parts. Friction welding is also a mature process, so that the welding quality can be guaranteed, the production efficiency can be improved, and the production cost can be reduced.
The batch manufacturing of the compressor crankshaft blanks refers to batch manufacturing of crankshaft blanks with various technical requirements, such as crankshafts suitable for common fixed-frequency compressors, crankshafts suitable for variable-frequency compressors and crankshafts suitable for carbon dioxide heat pump water heater compressors.
A method for manufacturing crankshaft blanks of compressors in batches sequentially comprises the following sequential steps, wherein in the first step, a long shaft 1, a short shaft 2 and an eccentric sleeve 3 are manufactured in batches without sequencing, at least one of the three parts of the long shaft 1, the short shaft 2 and the eccentric sleeve 3 is manufactured into a plurality of batches, and the technical requirements of the parts in the batches are not identical. If the long shaft 1 has three technical requirements, 1, the long shaft 1 is formed by cutting a low-carbon steel seamless steel tube; 2. the long shaft 1 is cut by adopting a low-carbon steel seamless steel tube, and then quenching treatment is carried out; 3. the long shaft 1 is formed by cutting a medium carbon steel seamless steel tube, and then quenching treatment is carried out. For another example, the short shaft 2 has three technical requirements, 1, the short shaft 2 is prepared by adopting low carbon steel as a raw material and performing cold extrusion molding; 2. the short shaft 2 is prepared by adopting low carbon steel as a raw material, performing cold extrusion molding, and then performing quenching treatment; 3. the short shaft 2 is prepared from medium carbon steel by cold extrusion molding and quenching. For another example, the eccentric sleeve 3 has two technical requirements, 1, the eccentric sleeve 3 is formed by sintering powder metallurgy, 2, the eccentric sleeve 3 is formed by sintering powder metallurgy, and then nitriding treatment is carried out. Preferably, the same parts with different technical requirements are the same in raw materials and/or have the same part of manufacturing procedures, so that the manufacturing cost of the parts can be obviously reduced, and the material utilization rate and the equipment utilization rate are improved.
Secondly, selecting the long shaft 1, the short shaft 2 and the eccentric sleeve 3, wherein at least one of the long shaft 1, the short shaft 2 and the eccentric sleeve 3 is selected from a plurality of batches, and the technical requirements of the selected parts are not identical; the assembling method is adopted for assembling, and the compressor crankshaft blank with various technical requirements is obtained. In actual production, the long shaft 1, the short shaft 2 and the eccentric sleeve 3 which are required by proper technical requirements are usually selected according to the technical requirements of the crankshaft for assembly. For example, a crankshaft of a normal-frequency rotary compressor is composed of a long shaft 1 cut from a seamless steel tube of low carbon steel, a short shaft 2 made from low carbon steel by cold extrusion, and an eccentric sleeve 3 sintered by powder metallurgy. For example, a crankshaft of the variable frequency rotary compressor is formed by cutting a low-carbon steel seamless steel tube to form a long shaft 1 subjected to quenching treatment, a short shaft 2 subjected to quenching treatment and formed by cold extrusion molding by adopting low-carbon steel as a raw material, and an eccentric sleeve 3 formed by adopting powder metallurgy sintering. For example, a crank shaft of a carbon dioxide heat pump water heater compressor is formed by cutting a medium carbon steel seamless steel tube into a long shaft 1 subjected to quenching treatment, a short shaft 2 subjected to quenching treatment and cold extrusion forming by adopting the medium carbon steel as a raw material, and an eccentric sleeve 3 subjected to nitriding treatment and sintered by adopting powder metallurgy.
Claims (8)
1. A batch manufacturing method of compressor crankshaft blanks comprises a hollow long shaft (1), a solid short shaft (2) and an eccentric sleeve (3) with a shaft hole (3 a), wherein one end part of the short shaft (2) is penetrated in the shaft hole (3 a) of the eccentric sleeve (3), and the short shaft (2) is tightly matched with the eccentric sleeve (3); the long shaft (1) and the short shaft (2) are coaxially arranged, and one end part of the long shaft (1) and one end part of the short shaft (2) and one end part of the long shaft (1) and the eccentric sleeve (3) are fixedly connected by welding;
The method is characterized in that the batch manufacturing method of the compressor crankshaft blank is sequentially carried out according to the following sequence, firstly, the long shaft (1), the short shaft (2) and the eccentric sleeve (3) are manufactured in batches without being orderly arranged, at least one of the three parts of the long shaft (1), the short shaft (2) and the eccentric sleeve (3) is manufactured into a plurality of batches, and the technical requirements of the parts of the batches are not identical;
secondly, selecting a batch of long shafts (1), short shafts (2) and eccentric sleeves (3) from the batches according to the technical requirements of the compressor crankshaft blank, and assembling, wherein the technical requirements of the parts of the long shafts (1), the short shafts (2) or the eccentric sleeves (3) of different batches are not completely the same; assembling by adopting a compressor crankshaft blank assembling method to obtain compressor crankshaft blanks with various technical requirements;
The assembling method of the crankshaft blank of the compressor is sequentially carried out according to the following steps, firstly, the short shaft (2) and the shaft hole (3 a) of the eccentric sleeve (3) are coaxially arranged, then the short shaft (2) and the eccentric sleeve (3) are pressed together, and the short shaft (2) penetrates through the shaft hole (3 a) of the eccentric sleeve (3); secondly, the long shaft (1) and the short shaft (2) are arranged coaxially, and then one end part of the long shaft (1) is welded with the short shaft (2) and the eccentric sleeve (3) together, so that a compressor crankshaft blank is manufactured.
2. A method of mass production of compressor crankshaft blanks according to claim 1, wherein the stub shaft (2) cooperates with the eccentric sleeve (3) with an interference of 0.02mm-0.04mm.
3. A method of mass production of compressor crankshaft blanks according to claim 1, characterized in that the eccentric sleeve (3) has a de-duplication hole (3 b) therein.
4. A method of mass production of compressor crankshaft blanks according to claim 1 or 2 or 3, characterized in that the stub shaft (2) has a splined section (2 b) therein, the splined section (2 b) being in splined engagement with the eccentric sleeve (3).
5. A method of mass production of compressor crankshaft blanks as claimed in claim 1 or 2 or 3, wherein the stub shaft (2) further has a welded connection section (2 a) therein, the welded connection section (2 a) being located in the cavity of the long shaft (1), the welded connection section (2 a) being secured to the long shaft (1) by welding.
6. A method of mass production of compressor crankshaft blanks according to claim 1 or 2 or 3, characterized in that the joint between the short shaft (2) and the eccentric sleeve (3) is directly opposite the end face of the long shaft (1).
7. A method of mass production of compressor crankshaft blanks as claimed in claim 6, wherein the welding also secures the stub shaft (2) and eccentric sleeve (3) together.
8. The batch manufacturing method of the compressor crankshaft blank according to claim 1, wherein the short shaft (2) is provided with a welding connection section (2 a) and a spline section (2 b), the end face of the spline section (2 b) is flush with the end face of the eccentric sleeve (3), a joint between the short shaft (2) and the eccentric sleeve (3) is opposite to the end face of the long shaft (1), and a gap (4) between the welding connection section (2 a) and the long shaft (1); the welding is friction welding, materials of the long shaft (1), the short shaft (2) and the eccentric sleeve (3) are melted, and molten liquid is filled in the gap (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011253685.2A CN112377514B (en) | 2020-11-11 | 2020-11-11 | Batch manufacturing method for compressor crankshaft blanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011253685.2A CN112377514B (en) | 2020-11-11 | 2020-11-11 | Batch manufacturing method for compressor crankshaft blanks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112377514A CN112377514A (en) | 2021-02-19 |
| CN112377514B true CN112377514B (en) | 2024-06-04 |
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| CN202011253685.2A Active CN112377514B (en) | 2020-11-11 | 2020-11-11 | Batch manufacturing method for compressor crankshaft blanks |
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Families Citing this family (1)
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| CN115306679A (en) * | 2022-09-06 | 2022-11-08 | 珠海格力电器股份有限公司 | Crankshaft structure and compressor |
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| CN108723722A (en) * | 2018-06-29 | 2018-11-02 | 浙江百达精工股份有限公司 | A kind of rotary compressor bent axle blank manufacturing method |
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