CN211623647U

CN211623647U - Oil-free piston type compressor

Info

Publication number: CN211623647U
Application number: CN201922466391.7U
Authority: CN
Inventors: 王涛; 屠天贝
Original assignee: Zhejiang Vie Qifu Auto Parts Co ltd
Current assignee: Zhejiang Vie Qifu Auto Parts Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-02
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a compressor field specifically discloses an oil-free piston compressor. The oil-free piston type compressor comprises a base, wherein a motor and at least one group of compression assemblies are connected to the base; the cooling assembly comprises a flow guide cover and a fan arranged below the base, the flow guide cover is partially or completely arranged on the compression assembly in a covering mode in the height direction, and a cooling space is formed between the flow guide cover and the outer side wall of the cooling assembly; the base is provided with an air guide hole which corresponds to the fan and is connected with the cooling space. The oil-free piston type compressor has the advantages of compact and reasonable structure and high cooling efficiency.

Description

Oil-free piston type compressor

Technical Field

The utility model relates to a compressor field, concretely relates to oil-free piston compressor.

Background

The air compressor is a main body of an air source device, and is a device for converting mechanical energy of a prime mover (usually, an electric motor) into gas pressure energy, and is an air pressure generating device for compressing air. As is known, the temperature and pressure rise can be realized in the gas compression process, and the good temperature reduction of gas in the compression process is one of effective means for improving the compression efficiency of the compressor, so that how to reasonably set a cooling system is realized, the cooling efficiency is improved on the premise of not influencing the normal work of the compressor, and the method is a crucial research direction in the field of compressors.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an oil-free piston compressor, compact structure is reasonable, and cooling efficiency is high.

In order to solve the technical problem, the utility model provides a technical scheme as follows: an oil-free piston type compressor comprises a base, wherein a motor and at least one group of compression assemblies are connected to the base; the cooling assembly comprises a flow guide cover and a fan arranged below the base, the flow guide cover is partially or completely arranged on the compression assembly in a covering mode in the height direction, and a cooling space is formed between the flow guide cover and the outer side wall of the cooling assembly; the base is provided with an air guide hole which corresponds to the fan and is connected with the cooling space.

The air guide hole and the air guide cover jointly form an air flow passage to guide air flow to dissipate heat of the compression assembly, the air flow is concentrated in flowing, and the cooling effect is good. Meanwhile, the fan is arranged below the bottom plate, the structure is compact and attractive, and the arrangement is more reasonable. Compared with the traditional arrangement mode, the fan has less interference on the compression assembly and the motor, and is more convenient to assemble and maintain.

Preferably, a bottom plate is connected to the lower portion of the base, and an installation space for installing the fan is formed between the bottom plate and the base. The bottom plate plays the guard action to the fan, also can reduce the suction of impurity simultaneously.

Preferably, the cooling assembly comprises a cylinder and a transmission case, the guide cover covers the outer side of the transmission case, and the upper end of the cooling space is opened; the lateral wall of cylinder is equipped with the radiating part, the radiating part be equipped with along the heat dissipation through-hole of direction of height through radiating part, the lower extreme and the cooling space alignment of heat dissipation through-hole.

Preferably, the number of the compression assemblies is two, namely a first-stage compression assembly and a second-stage compression assembly, the motor is arranged between the first-stage compression assembly and the second-stage compression assembly, and the motor drives the first-stage compression assembly and the second-stage compression assembly to work simultaneously; and a primary air outlet of the primary compression component is communicated with a secondary air inlet of the secondary compression component through an air conveying pipe. The motor is located between first-stage compression assembly and the second-stage compression assembly, and the complete machine operation is more steady, and the noise is lower, shakes littleer, and appearance structure is compacter, pleasing to the eye, has also left sufficient space for the installation of intercooler simultaneously.

Preferably, the primary compression assembly comprises a primary cylinder body and a primary cylinder cover, a primary piston is arranged in the primary cylinder body, a primary air inlet valve is arranged on the primary piston, and a primary air inlet joint is arranged on the primary transmission case; the one-level cylinder body and the one-level cylinder cover between be equipped with the one-level valve plate, the one-level valve plate on be equipped with the one-level air outlet valve that corresponds with the one-level gas outlet. The first-stage compression assembly adopts a piston top air inlet structure, and the overall cooling effect is improved.

Preferably, the primary piston is provided with a primary air inlet channel communicated with the inner cavity of the transmission case and the inner cavity of the cylinder, and the primary air inlet valve comprises a primary air inlet valve plate and an air inlet limiting screw which are arranged above the piston; the first-stage valve plate is provided with a first-stage air outlet channel; the first-stage air outlet valve comprises a first-stage air outlet valve plate and a first-stage air outlet fixed-distance plate which are arranged above the first-stage valve plate; and the bottom of the first-stage valve plate is provided with an avoiding hole corresponding to the air inlet limiting screw.

Preferably, the secondary compression assembly comprises a secondary cylinder body and a secondary cylinder cover, a secondary air inlet cavity communicated with the secondary air inlet and a secondary air exhaust cavity communicated with the secondary air outlet are arranged in the secondary cylinder cover, and the secondary air inlet cavity is annularly arranged around the secondary air exhaust cavity; the cylinder body of the second stage is internally provided with a second stage piston, a second stage valve plate is arranged between the second stage cylinder body and the second stage cylinder cover, and the second stage valve plate is provided with a second stage air inlet valve corresponding to the second stage air inlet cavity and a second stage exhaust valve corresponding to the second stage exhaust cavity.

Preferably, the secondary air inlet valve is arranged below the valve plate, and the secondary air outlet valve is arranged above the valve plate.

Preferably, the secondary piston is provided with a piston ring, and the inner side of the piston ring is provided with a liner; and a guide ring is also arranged on the outer side of the secondary piston. The arrangement of the gasket and the guide ring can improve the sealing effect of the piston and the cylinder wall.

Preferably, the primary piston and the secondary piston respectively comprise piston pins, oil storage cavities are arranged in the piston pins, lubricating holes penetrating through the side walls are formed in the side walls of the oil storage cavities, and high-temperature-resistant lubricating grease is filled in the oil storage cavities. The piston is lubricated with being connected of connecting rod, improves life.

Drawings

Fig. 1 is a schematic structural view of an oil-free piston compressor of the present embodiment;

fig. 2 is an exploded view of an oil-free piston type compressor of the present embodiment;

fig. 3 is a partial sectional view of a one-stage compression assembly of the oil-free piston type compressor of the present embodiment;

fig. 4 is a partial sectional view of a two-stage compression assembly of the oil-free piston type compressor of the present embodiment;

FIG. 5 is a schematic structural diagram of a first-stage valve plate assembly in the oil-free piston compressor of the present embodiment;

fig. 6 is a schematic structural view of a primary piston in the oil-free piston compressor of the present embodiment;

FIG. 7 is a schematic structural diagram of a two-stage valve plate assembly in the oil-free piston type compressor of the embodiment;

fig. 8 is a schematic structural view of a two-stage piston in the oil-free piston compressor of the present embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in fig. 1 and 2, an oil-free piston compressor comprises a base 62, wherein a motor 3 and at least one set of compression components are connected to the base 62; the cooling assembly comprises a guide cover 51 and a fan 53 arranged below a base 62, the guide cover 51 is partially or completely covered on the compression assembly in the height direction, and a cooling space is formed between the guide cover 51 and the outer side wall of the cooling assembly; the base 62 is provided with an air guide hole 54 corresponding to the fan 53 and connected with the cooling space.

As shown in fig. 1 and 2, a bottom plate 61 is connected to a lower portion of the base 62, and an installation space for installing the fan 53 is formed between the bottom plate 61 and the base 62. The bottom plate 61 protects the blower 53 and reduces the suction of foreign substances. The cooling assembly comprises an air cylinder and a transmission case, the guide cover 51 covers the outer side of the transmission case, and the upper end of the cooling space is opened; the lateral wall of cylinder is equipped with the heat dissipation portion, the heat dissipation portion be equipped with along the heat dissipation through-hole 52 of direction of height through the heat dissipation portion, the lower extreme of heat dissipation through-hole 52 aligns with the cooling space.

As shown in fig. 1 and 2, the number of the compression assemblies is two, namely, a first-stage compression assembly 1 and a second-stage compression assembly 4, the motor 3 is arranged between the first-stage compression assembly 1 and the second-stage compression assembly 4, and the motor 3 drives the first-stage compression assembly 1 and the second-stage compression assembly 4 to work simultaneously; the first-stage air outlet of the first-stage compression component 1 is communicated with the second-stage air inlet of the second-stage compression component 4 through the air conveying pipe 2. The motor 3 is positioned between the first-stage compression assembly 1 and the second-stage compression assembly 4, the whole machine is more stable in operation, lower in noise, smaller in vibration, more compact and attractive in appearance structure, and meanwhile, enough space is reserved for installation of the intercooler. A safety valve 21 is arranged between the first-stage compression component 1 and the second-stage compression component 4. The first-stage compression assembly 1 comprises two cylinders, and the two cylinders are arranged in a V shape. The secondary transmission case 47 is connected with an exhaust pipe 43, and the exhaust pipe 43 is provided with a one-way valve 44.

As shown in fig. 1-3, the primary compression assembly includes a primary cylinder 12 and a primary cylinder cover 11, a primary piston 14 is disposed in the primary cylinder 12, a primary air inlet valve is disposed on the primary piston 14, and a primary air inlet joint 13 is disposed on the primary transmission case 16; one-level valve plate 15 is arranged between the one-level cylinder body 12 and the one-level cylinder cover 11, and one-level air outlet valves corresponding to the one-level air outlets are arranged on the one-level valve plate 15. The primary compression assembly 1 adopts a piston top air inlet structure, and the overall cooling effect is improved. As shown in fig. 6, the primary piston 14 is provided with a primary air inlet channel 143 communicating the transmission case cavity and the cylinder cavity, and the primary air inlet valve includes a primary air inlet valve plate 142 and an air inlet limit screw 141 disposed above the piston. As shown in fig. 5, the first-stage valve plate 15 is provided with a first-stage air outlet channel 151; the primary air outlet valve comprises a primary air outlet valve plate 152 and a primary air outlet fixed distance plate 153 which are arranged above the primary valve plate 15; the bottom of the first-stage valve plate is provided with an avoiding hole 154 corresponding to the air inlet limiting screw 141.

As shown in fig. 1, 2 and 4, the secondary compression assembly includes a secondary cylinder 42 and a secondary cylinder cover 41, a secondary air intake chamber communicated with the secondary air intake and a secondary air exhaust chamber communicated with the secondary air outlet are provided in the secondary cylinder cover 41, and the secondary air intake chamber is annularly arranged around the secondary air exhaust chamber. The two-stage air compressor is characterized in that a two-stage piston 46 is arranged in the two-stage cylinder body 42, a two-stage valve plate 45 is arranged between the two-stage cylinder body 42 and the two-stage cylinder cover 41, and a two-stage air inlet valve 452 corresponding to a two-stage air inlet cavity and a two-stage air outlet valve 451 corresponding to a two-stage air outlet cavity are arranged on the two-stage valve plate 45. As shown in fig. 7, the secondary intake valve 452 is disposed below the valve plate, and the secondary exhaust valve 451 is disposed above the valve plate. As shown in fig. 8, the secondary piston 46 is provided with a piston ring 462, and a gasket 461 is provided inside the piston ring 462; the secondary piston 46 is also provided with a guide ring 463 at its outer side. The provision of the packing 461 and the guide ring 463 may improve the sealing effect of the piston against the cylinder wall.

As shown in fig. 6 and 8, the primary piston 14 and the secondary piston 46 respectively comprise a piston pin 7, an oil storage chamber 72 is arranged in the piston pin 7, a lubricating hole 71 penetrating through the side wall is arranged on the side wall of the oil storage chamber 72, and high-temperature grease is filled in the oil storage chamber 72. The piston is lubricated with being connected of connecting rod, improves life.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. An oil-free piston compressor, characterized in that: the device comprises a base, wherein a motor and at least one group of compression components are connected to the base; the cooling assembly comprises a flow guide cover and a fan arranged below the base, the flow guide cover is partially or completely arranged on the compression assembly in a covering mode in the height direction, and a cooling space is formed between the flow guide cover and the outer side wall of the cooling assembly; the base is provided with an air guide hole which corresponds to the fan and is connected with the cooling space.

2. An oil-free piston compressor as claimed in claim 1, wherein: the fan is characterized in that a bottom plate is connected to the lower portion of the base, and an installation space for installing a fan is formed between the bottom plate and the base.

3. An oil-free piston compressor as claimed in claim 1, wherein: the cooling assembly comprises an air cylinder and a transmission case, the guide cover is covered on the outer side of the transmission case, and the upper end of the cooling space is opened; the lateral wall of cylinder is equipped with the radiating part, the radiating part be equipped with along the heat dissipation through-hole of direction of height through radiating part, the lower extreme and the cooling space alignment of heat dissipation through-hole.

4. An oil-free piston compressor as claimed in any one of claims 1 to 3, wherein: the number of the compression assemblies is two, namely a first-stage compression assembly and a second-stage compression assembly, the motor is arranged between the first-stage compression assembly and the second-stage compression assembly, and the motor drives the first-stage compression assembly and the second-stage compression assembly to work simultaneously; and a primary air outlet of the primary compression component is communicated with a secondary air inlet of the secondary compression component through an air conveying pipe.

5. An oil-free piston compressor as claimed in claim 4, wherein: the primary compression assembly comprises a primary cylinder body and a primary cylinder cover, a primary piston is arranged in the primary cylinder body, a primary air inlet valve is arranged on the primary piston, and a primary air inlet joint is arranged on the primary transmission case; the one-level cylinder body and the one-level cylinder cover between be equipped with the one-level valve plate, the one-level valve plate on be equipped with the one-level air outlet valve that corresponds with the one-level gas outlet.

6. An oil-free piston compressor as claimed in claim 5, wherein: the primary piston is provided with a primary air inlet channel communicated with the inner cavity of the transmission case and the inner cavity of the cylinder, and the primary air inlet valve comprises a primary air inlet valve plate and an air inlet limiting screw which are arranged above the piston;

the first-stage valve plate is provided with a first-stage air outlet channel; the first-stage air outlet valve comprises a first-stage air outlet valve plate and a first-stage air outlet fixed-distance plate which are arranged above the first-stage valve plate;

and the bottom of the first-stage valve plate is provided with an avoiding hole corresponding to the air inlet limiting screw.

7. An oil-free piston compressor as claimed in claim 5, wherein: the secondary compression assembly comprises a secondary cylinder body and a secondary cylinder cover, a secondary air inlet cavity communicated with a secondary air inlet and a secondary air exhaust cavity communicated with a secondary air outlet are arranged in the secondary cylinder cover, and the secondary air inlet cavity is annularly arranged around the secondary air exhaust cavity; the cylinder body of the second stage is internally provided with a second stage piston, a second stage valve plate is arranged between the second stage cylinder body and the second stage cylinder cover, and the second stage valve plate is provided with a second stage air inlet valve corresponding to the second stage air inlet cavity and a second stage exhaust valve corresponding to the second stage exhaust cavity.

8. An oil-free piston compressor as claimed in claim 7, wherein: the second-stage air inlet valve is arranged below the valve plate, and the second-stage exhaust valve is arranged above the valve plate.

9. An oil-free piston compressor as claimed in claim 7 or 8, wherein: the secondary piston is provided with a piston ring, and the inner side of the piston ring is provided with a liner; and a guide ring is also arranged on the outer side of the secondary piston.

10. An oil-free piston compressor as claimed in claim 7 or 8, wherein: the first-stage piston and the second-stage piston respectively comprise piston pins, oil storage cavities are arranged in the piston pins, lubricating holes penetrating through the side walls are formed in the side walls of the oil storage cavities, and high-temperature-resistant lubricating grease is filled in the oil storage cavities.