CN109026692B - Multi-cylinder pump body structure and compressor - Google Patents
Multi-cylinder pump body structure and compressor Download PDFInfo
- Publication number
- CN109026692B CN109026692B CN201810983628.6A CN201810983628A CN109026692B CN 109026692 B CN109026692 B CN 109026692B CN 201810983628 A CN201810983628 A CN 201810983628A CN 109026692 B CN109026692 B CN 109026692B
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- crankshaft
- working
- volume
- compressor
- cylinder pump
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- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000004308 accommodation Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3446—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
- F04C18/3447—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface the vanes having the form of rollers, slippers or the like
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a multi-cylinder pump body structure and a compressor, wherein the multi-cylinder pump body structure comprises: the device comprises a plurality of working cavities and a plurality of crankshafts, wherein each crankshaft is provided with at least one eccentric cam, each eccentric cam is provided with a working cavity, and the working cavities have working volumes. When more than one eccentric cam is arranged on the crankshaft, the ratio of the minimum working volume to the maximum working volume in the working cavity arranged on the crankshaft is more than or equal to 0.1. The invention can improve the efficiency and the operation stability of the compressor.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a multi-cylinder pump body structure and a compressor.
Background
The existing multi-cylinder rotary compressor adopts a crankshaft to connect a motor part and a compression cylinder body mechanism, and the crankshaft structure has the following problems: 1. when the displacement of the plurality of cylinders is larger, under the reliability requirement, the crankshaft diameter of the cylinder with large displacement and large load is thick, and is limited by the crankshaft diameter of the crankshaft, the cylinder diameter of the cylinder with smaller displacement cannot be reduced, so that the efficiency of the cylinder with smaller displacement is low, and the overall efficiency of the compressor is further influenced; 2. when the number of the cylinders is larger, the eccentric cams on the crankshaft are larger, the processing technology of the crankshaft is more complex, the processing difficulty is high, the rejection rate is high, the production and manufacturing cost is increased, and the working stability of the compressor and the reliability of the crankshaft are poorer.
Therefore, how to design a multi-cylinder pump body structure for improving the efficiency of a compressor is a technical problem to be solved in the industry.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a multi-cylinder pump body structure and a compressor.
The technical scheme adopted by the invention is that a multi-cylinder pump body structure is designed, which comprises: the device comprises a plurality of working cavities and a plurality of crankshafts, wherein each crankshaft is provided with at least one eccentric cam, each eccentric cam is provided with a working cavity, and the working cavities have working volumes. When more than one eccentric cam is arranged on the crankshaft, the ratio of the minimum working volume to the maximum working volume in the working cavity arranged on the crankshaft is more than or equal to 0.1.
In one embodiment, the ratio of the minimum working volume to the maximum working volume in all working chambers is less than 0.1, and the working chamber in which the minimum working volume is located and the working chamber in which the maximum working volume is located are disposed on different crankshafts.
Preferably, two adjacent crankshafts are connected and fixed through a connecting structure.
Preferably, the connection structure comprises a coupling.
Preferably, the two crankshafts connected by the coupling are a first crankshaft and a second crankshaft respectively, one end of the coupling is provided with a first accommodating hole, the other end of the coupling is provided with a second accommodating hole, the end part of the first crankshaft is fixed in the first accommodating hole, and the end part of the second crankshaft is fixed in the second accommodating hole.
Preferably, the outer diameter of the end part of the first crankshaft is larger than the first accommodating hole, the outer diameter of the end part of the second crankshaft is larger than the second accommodating hole, and the coupler fixedly connects the first crankshaft and the second crankshaft through a hot sheathing process.
Preferably, at most two eccentric cams are provided on each crankshaft.
Preferably, when more than one eccentric cam is provided on the crankshaft, the ratio of the minimum working volume to the maximum working volume in all working chambers provided on the crankshaft is 0.5 or more.
The invention also provides a compressor, which comprises the multi-cylinder pump body structure.
Wherein the compressor further comprises: the working chambers are provided with a plurality of cylinders, rollers, the number of which is the same as that of the working chambers and are arranged in the working chambers in a one-to-one correspondence manner, the eccentric cams are positioned in the rollers, and the working volume of the working chambers is the residual volume between the working chambers and the rollers in the working chambers.
In one embodiment, the compressor is a refrigeration compressor.
Compared with the prior art, the invention ensures that the cylinder body corresponding to the crankshaft has high working efficiency and stable operation by limiting the ratio of the minimum working volume to the maximum working volume configured on a single crankshaft to be not less than 0.1. When the ratio of the minimum working volume to the maximum working volume in the working cavity is smaller than 0.1, the working cavity where the minimum working volume is located and the working cavity where the maximum working volume is located are configured on different crankshafts, so that the small-volume cylinder is separated from the large-volume cylinder, the design of the small-volume cylinder is not limited by the large-volume cylinder, and the efficiency of the small-volume cylinder is improved.
Drawings
The invention is described in detail below with reference to examples and figures, wherein:
FIG. 1 is a schematic connection diagram of a multi-cylinder pump body structure in the invention;
FIG. 2 is a schematic view of a first crankshaft of the present invention;
FIG. 3 is a schematic view of a second crankshaft of the present invention;
Fig. 4 is a schematic structural view of the coupling according to the present invention.
Detailed Description
As shown in fig. 1, the multi-cylinder pump body structure provided by the invention comprises: the device comprises a plurality of working cavities 1 and a plurality of crankshafts 2, wherein at least one eccentric cam 21 is arranged on each crankshaft 2, each eccentric cam 21 is provided with one working cavity 1, and the eccentric cams 21 are in one-to-one correspondence with the working cavities 1. The working chamber 1 has a working volume, which here generally refers to the remaining volume between the working chamber 1 and the rollers 5 inside it.
In the design process of the multi-cylinder pump body structure, when more than one eccentric cam 21 is arranged on a single crankshaft 2, the working cavity 1 arranged on the crankshaft 2 has the minimum working volume Vmin and the maximum working volume Vmax, and the minimum working volume Vmin/Vmax is more than or equal to 0.1, so that the working efficiency of the working cavity corresponding to the crankshaft 2 is high and the operation is stable. In order to reduce the length of the individual crankshafts 2, at most two eccentric cams 21 are provided on each crankshaft 2 in order to increase the structural strength of the crankshafts 2. Further, when more than one eccentric cam 21 is provided on the crankshaft 2, the ratio of the minimum working volume to the maximum working volume in all working chambers 1 configured on the crankshaft 2 is greater than or equal to 0.5, and the working efficiency of the working chamber 1 corresponding to the crankshaft 2 is higher and the running stability is better.
When the minimum working volume Vmin and the maximum working volume Vmax exist in all working cavities 1 of the multi-cylinder pump body structure and the Vmin/Vmax is smaller than 0.1, the working cavity where the minimum working volume Vmin is located and the working cavity where the maximum working volume Vmax is located must be configured on different crankshafts 2 so as to separate the small-volume working cavity from the large-volume working cavity, and the design of the size of the small-volume working cavity is not limited by the large-volume working cavity, so that the efficiency of the small-volume working cavity is improved. At this time, a plurality of crankshafts 2 are arranged in the multi-cylinder pump body structure, and two adjacent crankshafts 2 are connected and fixed through a connecting structure to form an integral crankshaft penetrating through all working cavities 1.
As shown in fig. 1 to 3, the present invention provides an embodiment, in which three working chambers 1 and two crankshafts 2 are provided in a multi-cylinder pump body structure, the two crankshafts 2 are a first crankshaft 2a and a second crankshaft 2b, two eccentric cams 21 are provided on the first crankshaft 2a, and two working chambers 1 are correspondingly configured, and Vmin/Vmax of the two working chambers 1 is greater than or equal to 0.1. The second crankshaft 2a is provided with an eccentric cam 21, and the remaining working chamber 1 is correspondingly arranged, and the ratio of the working volume of the working chamber 1 to the maximum working volume Vmax arranged on the first crankshaft 2a is smaller than 0.1. As shown in fig. 2 to 4, in the present embodiment, the connecting structure includes the coupling 3, the first crankshaft 2a and the second crankshaft 2b are joined by the coupling 3, one end of the coupling 3 is provided with the first accommodation hole 31, the other end of the coupling 3 is provided with the second accommodation hole 32, the outer diameter of the end portion of the first crankshaft 2a is larger than the first accommodation hole 31, the outer diameter of the end portion of the second crankshaft 2b is larger than the second accommodation hole 32, and the coupling 3 fixes the end portion of the first crankshaft 2a in the first accommodation hole 31 and the end portion of the second crankshaft 2b in the second accommodation hole 32 by the shrink-fit process.
As shown in fig. 1, the present invention also proposes a compressor comprising: at least two cylinders 4 provided with working chambers 1, rollers 5 which are the same as the working chambers 1 in number and are arranged in the working chambers 1 in one-to-one correspondence, the multi-cylinder pump body structure and sliding sheets arranged in the cylinders 4, and eccentric cams 21 are arranged in the rollers 5. In a preferred embodiment, the compressor is a refrigeration compressor.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (11)
1. A multi-cylinder pump body structure comprising: a plurality of working chambers (1) and a plurality of crankshafts (2), wherein each crankshaft (2) is provided with at least one eccentric cam (21), each eccentric cam (21) is provided with one working chamber (1), and the working chamber (1) has a working volume;
When more than one eccentric cam (21) is arranged on a single crankshaft (2), the ratio of the minimum working volume to the maximum working volume in a working cavity (1) arranged on the crankshaft (2) is more than or equal to 0.1;
The ratio of the minimum working volume to the maximum working volume in all working chambers (1) is smaller than 0.1, and the working chamber in which the minimum working volume is located and the working chamber in which the maximum working volume is located are arranged on different crankshafts (2).
2. The multi-cylinder pump body structure according to claim 1, wherein two adjacent crankshafts (2) are joined and fixed by a connecting structure.
3. The multi-cylinder pump structure according to claim 2, characterized in that the connecting structure comprises a coupling (3).
4. A multi-cylinder pump body structure as claimed in claim 3, wherein the two crankshafts connected by the coupling (3) are a first crankshaft (2 a) and a second crankshaft (2 b), one end of the coupling (3) is provided with a first accommodating hole (31), the other end is provided with a second accommodating hole (32), the end part of the first crankshaft (2 a) is fixed in the first accommodating hole (31), and the end part of the second crankshaft (2 b) is fixed in the second accommodating hole (32).
5. The multi-cylinder pump body structure according to claim 4, wherein an outer diameter of an end portion of the first crankshaft (2 a) is larger than the first accommodation hole (31), an outer diameter of an end portion of the second crankshaft (2 b) is larger than the second accommodation hole (32), and the coupling (3) fixedly connects the first crankshaft (2 a) and the second crankshaft (2 b) through a shrink-fit process.
6. A multi-cylinder pump structure according to any one of claims 1 to 5, characterized in that at most two eccentric cams (21) are provided on each crankshaft (2).
7. The multi-cylinder pump structure according to any one of claims 1 to 5, characterized in that when more than one eccentric cam (21) is provided on the crankshaft (2), the ratio of the minimum working volume to the maximum working volume in all working chambers (1) provided on the crankshaft (2) is 0.5 or more.
8. A compressor, comprising: the multi-cylinder pump body structure of any one of claims 1 to 7.
9. The compressor as set forth in claim 8, further comprising: the multiple cylinders (4) provided with the working cavities (1) and rollers (5) which are the same as the working cavities (1) in number and are arranged in the working cavities (1) in a one-to-one correspondence mode, and the eccentric cams (21) are arranged in the rollers (5).
10. A compressor according to claim 9, characterized in that the working volume is the remaining volume between the working chamber (1) and the rollers (5) inside it.
11. The compressor of claim 8, wherein the compressor is a refrigeration compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983628.6A CN109026692B (en) | 2018-08-27 | 2018-08-27 | Multi-cylinder pump body structure and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983628.6A CN109026692B (en) | 2018-08-27 | 2018-08-27 | Multi-cylinder pump body structure and compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109026692A CN109026692A (en) | 2018-12-18 |
| CN109026692B true CN109026692B (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810983628.6A Active CN109026692B (en) | 2018-08-27 | 2018-08-27 | Multi-cylinder pump body structure and compressor |
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| Country | Link |
|---|---|
| CN (1) | CN109026692B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0932773A (en) * | 1995-07-17 | 1997-02-04 | Mitsubishi Electric Corp | Bearing aligning method and bearing aligning device |
| CN101688537A (en) * | 2008-05-08 | 2010-03-31 | 松下电器产业株式会社 | Fluid machine |
| CN106704188A (en) * | 2017-02-24 | 2017-05-24 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration system having same |
| CN107191373A (en) * | 2017-07-31 | 2017-09-22 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigerating plant |
| CN208651155U (en) * | 2018-08-27 | 2019-03-26 | 珠海凌达压缩机有限公司 | A kind of multi-cylinder pump body structure and compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953545B (en) * | 2014-04-10 | 2016-01-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner |
-
2018
- 2018-08-27 CN CN201810983628.6A patent/CN109026692B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0932773A (en) * | 1995-07-17 | 1997-02-04 | Mitsubishi Electric Corp | Bearing aligning method and bearing aligning device |
| CN101688537A (en) * | 2008-05-08 | 2010-03-31 | 松下电器产业株式会社 | Fluid machine |
| CN106704188A (en) * | 2017-02-24 | 2017-05-24 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration system having same |
| CN107191373A (en) * | 2017-07-31 | 2017-09-22 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigerating plant |
| CN208651155U (en) * | 2018-08-27 | 2019-03-26 | 珠海凌达压缩机有限公司 | A kind of multi-cylinder pump body structure and compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109026692A (en) | 2018-12-18 |
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