CN209855985U - Two-stage compressor - Google Patents
Two-stage compressor Download PDFInfo
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- CN209855985U CN209855985U CN201920483675.4U CN201920483675U CN209855985U CN 209855985 U CN209855985 U CN 209855985U CN 201920483675 U CN201920483675 U CN 201920483675U CN 209855985 U CN209855985 U CN 209855985U
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Abstract
The utility model discloses a two-stage compressor, which comprises a first-stage compressor for compressing gas once and a second-stage compressor connected with the first-stage compressor and used for compressing the gas compressed by the first-stage compressor for the second time; the cooling device is used for cooling the primary compressor and the secondary compressor; the first-stage compressor is a swing type low-pressure cylinder, and the second-stage compressor is a piston type high-pressure cylinder. The utility model provides a when compressor satisfies exhaust pressure and discharge capacity, reduced the cost of compressor and improved the work system of compressor.
Description
Technical Field
The utility model relates to a compressor field, in particular to two-stage compressor.
Background
The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is widely applied to industry and vehicle production and manufacturing at present.
The ratio of the exhaust pressure to the intake pressure of the compressor is a pressure ratio, and the pressure ratio of a single-stage compressor is usually small and the discharge capacity is small, so that the requirements of many industrial occasions cannot be met; the single-stage compressor with larger pressure ratio has lower working efficiency and the temperature of the piston part is easy to be overhigh in the compression working process, thereby influencing the normal work and the service life; many occasions adopt multistage compressor to improve work efficiency, reduce exhaust temperature, it is a multistage piston compressor to be more common at present, each compression stage all adopts piston compressor, the exhaust pressure is higher, the discharge capacity can satisfy the demand of most industry occasions, but piston compressor has the guide ring and connects the bearing of piston pin, the cost of these parts is than higher, still need use high temperature resistant grease to lubricate for manufacturing cost and running cost are higher.
Therefore, how to reduce the cost of the compressor while maintaining the discharge pressure of the compressor becomes a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two-stage compressor, this two-stage compressor manufacturing cost and use cost are lower.
In order to achieve the above object, the present invention provides a two-stage compressor, which comprises a first-stage compressor for compressing gas once and a second-stage compressor connected to the first-stage compressor for compressing gas compressed by the first-stage compressor twice; the cooling device is used for cooling the primary compressor and the secondary compressor;
the first-stage compressor is a swing type low-pressure cylinder, and the second-stage compressor is a piston type high-pressure cylinder.
Preferably, the low-pressure air outlet of the primary compressor is connected with the high-pressure air inlet of the secondary compressor through a cooling pipeline, and the cooling device is arranged among the primary compressor, the secondary compressor and the cooling pipeline so as to realize that the cooling device cools the primary compressor, the secondary compressor and the cooling pipeline.
Preferably, the cooling device is a cooling fan, and the cooling fan is multiple and the air outlets of the cooling fan are respectively arranged towards the primary compressor, the secondary compressor and the cooling pipeline.
Preferably, the compressor further comprises a first eccentric wheel arranged between the two primary compressors and used for driving the two primary compressors, and a second eccentric wheel arranged between the other primary compressor and one secondary compressor and used for driving the other primary compressor and one secondary compressor;
the first eccentric wheel and the second eccentric wheel are used for being connected with power equipment to drive the first-stage compressor and the second-stage compressor to compress gas.
Preferably, the air purifier further comprises a filter arranged at the air inlet, and the filter is arranged between the air inlet and the low-pressure air inlet.
Preferably, the primary compressor comprises a low-pressure connecting rod assembly connected to the first eccentric wheel or the second eccentric wheel, and the low-pressure connecting rod assembly is further connected to a low-pressure air inlet valve plate and a low-pressure air outlet valve plate for respectively controlling air inlet and air outlet of the primary compressor.
Preferably, the secondary compressor comprises a high-pressure connecting rod assembly connected to the second eccentric wheel, and the high-pressure connecting rod assembly is further connected with a high-pressure air inlet valve plate and a high-pressure air outlet valve plate which are used for respectively controlling air inlet and air outlet of the secondary compressor.
Compared with the prior art, the two-stage compressor provided by the utility model comprises a first-stage compressor for compressing gas for the first time, a second-stage compressor which is connected with the first-stage compressor and is used for compressing the gas compressed by the first-stage compressor for the second time, and a cooling device for cooling the first-stage compressor and the second-stage compressor; wherein, the first-stage compressor adopts a swing type low pressure cylinder, and the second-stage compressor adopts a piston type high pressure cylinder; the gas pressure can reach 0.3-0.4 MPa after being compressed by the swinging type low-pressure cylinder, the gas pressure can reach 1.2MPa after being compressed by the piston type high-pressure cylinder, the first-stage piston cylinder adopts the swinging type low-pressure cylinder, the piston is driven to move by eccentric swinging of a leather cup connected with the connecting rod assembly, the gas compression is realized, compared with the common piston type low-pressure cylinder, a guide ring is omitted, a high-pressure piston pin and a needle bearing are connected, the use amount of high-temperature-resistant grease is reduced, the manufacturing and using cost of the second-stage compression cylinder is greatly reduced, meanwhile, a two-stage compressor is adopted instead of more stages, the structure is relatively simpler, the oil cooling of the high-temperature-resistant grease is replaced for the first-stage compressor and the second-stage compressor through cooling devices such as fans, the use amount.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a two-stage compressor according to an embodiment of the present invention.
Wherein:
1-a first-stage compressor, 2-a second-stage compressor, 3-an air inlet, 4-a low-pressure air inlet, 5-a shell, 6-a filter, 7-an air inlet diaphragm, 8-a low-pressure air outlet, 9-a bearing, 10-a first eccentric wheel, 11-a low-pressure connecting rod assembly, 12-a low-pressure air inlet valve plate, 13-a low-pressure air outlet valve plate, 14-a low-pressure stroke limiting plate, 15-a cooling device, 16-a high-pressure air inlet, 17-an air outlet, 18-a high-pressure stroke limiting plate, 19-a high-pressure air outlet valve plate, 20-a high-pressure air inlet valve plate, 21-a high-pressure piston assembly, 22-a high-pressure piston pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a two-stage compressor according to an embodiment of the present invention.
The utility model provides a secondary compressor 2 is including being used for gas to carry out the one-level compressor 1 of once compressing and connecting one-level compressor 1, being used for carrying out secondary compressor 2 of secondary compression to the gas after 1 compressions of one-level compressor, through the two-stage compression, has reduced the pressure ratio of arbitrary single stage compressor to reduce exhaust temperature, satisfied the demand of most of industry occasions, improved mechanical efficiency. The first-stage compressor 1 specifically adopts a swing type low-pressure cylinder, the second-stage compressor 2 adopts a piston type high-pressure cylinder, and the cooling device 15 is used for cooling the first-stage compressor 1 and the second-stage compressor 2. The swing of the swing type low-pressure cylinder omits a guide ring and a piston pin compared with the piston type low-pressure cylinder swing, and a needle bearing 9 for connecting the piston pin is connected, so that high-temperature-resistant grease is reduced, and the low-pressure cylinder swing is a relatively high-cost accessory. But the primary compressor 1 and the secondary compressor 2 are cooled through the oscillating type leather cup sealing and the cooling device 15, so that the exhaust temperature is reduced, the compression efficiency is improved, and the cost of the compressor is reduced.
The gas pressure can reach 0.3-0.4 MPa after being compressed by the swing type low pressure cylinder, and can reach 1.2MPa after being compressed by the piston type high pressure cylinder, so that the requirements of most industrial occasions are met, and meanwhile, the cost of the compressor is reduced by adopting the swing type low pressure cylinder. The concrete prior art that can refer to of formula low pressure jar and piston high pressure jar sways, the utility model discloses a core lies in that the compressor design is two-stage compressor and the type and the overall arrangement of reasonable compressor at different levels that set up, cools off the compressor at different levels through cooling device 15, improves compressor reliability, life, reduces the manufacturing and the use cost of compressor.
The structure of the two-stage compressor provided by the utility model is shown in figure 1, the two-stage compressor is a four-cylinder two-stage compressor, comprising three first-stage compressors 1 and a second-stage compressor 2, the four compressors are arranged symmetrically in pairs; the two-two symmetrical arrangement is as follows: two first-stage compressors 1 are oppositely arranged by a low-pressure air inlet 4, the other first-stage compressor 1 and the second-stage compressor 2 are symmetrically arranged with the two first-stage compressors 1, and the four compressors form a rectangle and are arranged at four corners of the rectangle; still including the cooling tube who connects low pressure gas outlet 8 and high pressure air inlet 16, cooling device 15 sets up between primary compressor 1, secondary compressor 2 and cooling tube to the realization reduces exhaust temperature to the cooling of three, improves the whole life of compressor, reduces the use of high temperature resistant grease, reduces use cost.
The first-stage compressor 1 is also called a low-pressure compressor and employs a swing type low-pressure cylinder, and the second-stage compressor 2 is also called a high-pressure compressor and employs a piston type high-pressure cylinder. The low pressure and the high pressure are relative concepts, and no specific numerical value is specified; the discharge pressure of the first-stage compressor 1 that primarily compresses gas is lower than the discharge pressure of the second-stage compressor 2 that secondarily compresses gas, and therefore, the compressor is called a low-pressure compressor.
The utility model provides a in a specific embodiment, cooling device 15 specifically is cooling fan, and cooling fan is a plurality of, and a plurality of cooling fan's air outlet is towards one-level compressor 1, secondary compressor 2 and cooling tube respectively to the realization is to the cooling of three, has effectively reduced exhaust temperature, has improved two-stage compressor's compression efficiency and life, has reduced the use cost of compressor.
A first eccentric wheel 10 for driving the two first compressors to move is arranged between the two primary compressors 1 which are oppositely arranged at the low-pressure air inlets 4, a second eccentric wheel 24 for driving the two first compressors is arranged between the other primary compressor 1 and the other secondary compressor 2, and the first eccentric wheel 10 and the second eccentric wheel 24 are connected with power equipment to drive the first compressor 1 and the second compressor 2 to work so as to compress air.
In order to ensure the air inlet quality, impurities in the first-stage compressor 1 and the second-stage compressor 2 are reduced, and therefore abrasion of pistons is reduced, the air inlet 3 of the two-stage compressor is further provided with the filter 6, the filter 6 is specifically arranged between the air inlet 3 and the low-pressure air inlet 4, and the air inlet diaphragm 7 is further arranged behind the filter 6, so that the quality of gas entering the first-stage compressor 1, namely the low-pressure compressor, is ensured, and the impurities are prevented from entering the air cylinder. The low-pressure air inlets 4 of the two primary compressors 1 which are arranged opposite to the low-pressure air inlet 4 are directly connected with the air inlet 3 through the shell 5, and the low-pressure air inlet 4 of the other primary compressor 1 is connected with the air inlet 3 through the first cooling pipeline to realize air inlet; the low-pressure air outlet 8 is connected with a high-pressure air inlet 16 of the secondary compressor 2 through a second cooling pipeline, and is discharged out of the four-cylinder two-stage compressor through an air outlet 17 after being compressed by the secondary compressor 2.
The above-mentioned first-stage compressor 1 specifically includes the low-pressure connecting rod assembly 11 connected to the first eccentric wheel 10 or the second eccentric wheel 24, wherein the low-pressure connecting rod assembly 11 of the first-stage compressor 1 that two low-pressure air inlets 4 set up relatively connects first eccentric wheel 10, the low-pressure connecting rod assembly 11 of another first-stage compressor 1 connects the second eccentric wheel 24, the low-pressure connecting rod assembly 11 is used for controlling low-pressure air inlet valve block 12 and low-pressure air outlet valve respectively and realizes the air intake of first-stage compressor 1 and the exhaust after the compression. Specifically, when the low-pressure connecting rod assembly 11 and related components thereof move downwards, the low-pressure air inlet valve plate 12 is opened, and air flow enters a cavity of the primary compressor 1 through the air inlet filter 6 and the low-pressure air inlet 4; when the low-pressure connecting rod assembly 11 and related components move upwards, the leather cup moves along with the low-pressure connecting rod assembly 11 to keep the sealing of the piston, the piston moves downwards to compress gas, the low-pressure gas outlet valve piece 13 is opened, and the gas is discharged out of the primary compressor 1.
The secondary compressor 2 specifically comprises a high-pressure connecting rod assembly 23 connected with the second eccentric wheel, and the high-pressure connecting rod assembly 23 is used for respectively controlling the high-pressure air inlet valve plate 20 and the high-pressure air outlet valve to realize air inlet and air exhaust after compression of the secondary compressor 2. Specifically, under the driving of the second eccentric wheel, when the high-pressure connecting rod assembly 23 and the related components thereof move downwards, the high-pressure air inlet valve plate 20 is opened, and the air flow enters the cavity of the secondary compressor 2 through the cooling pipeline from the low-pressure air outlet, because the high-pressure air inlet valve plate 20 and the high-pressure air outlet valve plate 19 are both arranged above and below the valve plate of the shell 5 component, when the high-pressure connecting rod assembly 23 and the related components thereof move downwards, the high-pressure piston assembly 21 is driven to move downwards, and the high-pressure air inlet valve plate 20 is opened, and the air. When the high-pressure connecting rod assembly and related parts move upwards, the piston assembly is driven to move upwards, and the high-pressure air outlet valve plate 19 is opened to finish secondary compression of air and is discharged out of the two-stage compressor through the air outlet 17. As shown in fig. 1, the direction of the arrow in the cooling duct indicates the flow direction of the compressed gas, and the arrow at the cooling device 15 indicates the direction of the cooling wind.
The primary compressor 1 is further provided with a low pressure stroke limiting plate 14 for limiting the movement stroke of the low pressure connecting rod assembly 11, and the secondary compressor 2 is provided with a high pressure stroke limiting plate 18 for limiting the movement stroke of the high pressure connecting rod assembly 23. The first eccentric wheel 10 and the second eccentric wheel, the low-pressure connecting rod assembly 11 and the high-pressure connecting rod assembly 23 are arranged in the two-stage compressor through a certain bearing 9, the low-pressure piston cylinder is connected with the low-pressure connecting rod assembly 11 through a leather cup, the high-pressure piston cylinder is connected with the high-pressure piston cylinder through a high-pressure piston pin 22, and the prior art can be referred to in other specific structures.
The two-stage compressor 2 provided by the utility model sets the compressor as a two-stage compressor, and selects the swing type low pressure cylinder as the one-stage compressor 1, the swing type low pressure cylinder adopts the leather cup sealing to drive the movement of the low pressure piston, thereby reducing the expensive parts such as a piston ring and a needle bearing 9, and reducing the cost of the one-stage compressor 1 and the whole two-stage compressor; the cooling pipeline is arranged between the two primary compressors 1 and the two secondary compressors 2, and the cooling device 15 is used for cooling the primary compressors 1, the secondary compressors 2 and the cooling pipeline, so that the exhaust temperature is reduced, and the compression efficiency is improved; on the other hand, the use of high-temperature resistant grease is reduced, so that the use cost of the two-stage compressor is reduced.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The above is to the two-stage compressor provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A two-stage compressor is characterized by comprising a first-stage compressor (1) for compressing gas for the first time and a second-stage compressor (2) which is connected with the first-stage compressor (1) and is used for compressing the gas compressed by the first-stage compressor (1) for the second time; further comprising cooling means (15) to cool said primary compressor (1) and said secondary compressor (2);
the primary compressor (1) is a swing type low-pressure cylinder, and the secondary compressor (2) is a piston type high-pressure cylinder.
2. A two-stage compressor according to claim 1, characterised in that the low-pressure outlet (8) of the one-stage compressor (1) and the high-pressure inlet (16) of the two-stage compressor (2) are connected by a cooling duct, the cooling device (15) being arranged between the one-stage compressor (1), the two-stage compressor (2) and the cooling duct to effect cooling of the three by the cooling device (15).
3. A two-stage compressor according to claim 2, characterised in that the cooling device (15) is a cooling fan which is plural and the outlet vents of which are arranged towards the primary compressor (1), the secondary compressor (2) and the cooling duct, respectively.
4. A two-stage compressor according to claim 3, characterized in that there are three of said one-stage compressors (1) and one of said two-stage compressors (2); the three first-stage compressors (1) and the two second-stage compressor (2) are arranged in pairwise symmetry.
5. A two-stage compressor according to claim 4, characterized by further comprising a first eccentric (10) arranged between two of said one-stage compressors (1) for driving two of said one-stage compressors (1) and a second eccentric (24) arranged between the other one-stage compressor (1) and one of said two-stage compressors (2) for driving the other one-stage compressor (1) and one of said two-stage compressors (2);
the first eccentric wheel (10) and the second eccentric wheel (24) are used for connecting power equipment to drive the primary compressor (1) and the secondary compressor (2) to compress gas.
6. A two-stage compressor according to claim 5, further comprising a filter (6) provided at the inlet (3), the filter (6) being provided between the inlet (3) and the low pressure inlet (4).
7. A two-stage compressor according to claim 6, characterized in that the one-stage compressor (1) comprises a low-pressure connecting-rod assembly (11) connected to the first eccentric (10) or the second eccentric (24), the low-pressure connecting-rod assembly (11) being further connected to a low-pressure inlet valve plate (12) and a low-pressure outlet valve plate (13) for controlling the inlet and outlet, respectively, of the one-stage compressor (1).
8. A two-stage compressor according to claim 6, characterized in that the two-stage compressor (2) comprises a high-pressure connecting-rod assembly (23) connected to the second eccentric (24), the high-pressure connecting-rod assembly (23) being further connected to a high-pressure inlet valve plate (20) and a high-pressure outlet valve plate (19) for controlling the inlet and outlet, respectively, of the two-stage compressor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920483675.4U CN209855985U (en) | 2019-04-10 | 2019-04-10 | Two-stage compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920483675.4U CN209855985U (en) | 2019-04-10 | 2019-04-10 | Two-stage compressor |
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| CN209855985U true CN209855985U (en) | 2019-12-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882375A (en) * | 2019-04-10 | 2019-06-14 | 浙江北上新能源科技股份有限公司 | A kind of two-stage compressor |
| US11906188B2 (en) | 2022-03-11 | 2024-02-20 | Johnson Controls Tyco IP Holdings LLP | Energy efficient heat pump systems and methods |
-
2019
- 2019-04-10 CN CN201920483675.4U patent/CN209855985U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882375A (en) * | 2019-04-10 | 2019-06-14 | 浙江北上新能源科技股份有限公司 | A kind of two-stage compressor |
| US11906188B2 (en) | 2022-03-11 | 2024-02-20 | Johnson Controls Tyco IP Holdings LLP | Energy efficient heat pump systems and methods |
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