CN210460976U - Oil-free piston type compressor with two-stage compression - Google Patents

Oil-free piston type compressor with two-stage compression Download PDF

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Publication number
CN210460976U
CN210460976U CN201921102449.3U CN201921102449U CN210460976U CN 210460976 U CN210460976 U CN 210460976U CN 201921102449 U CN201921102449 U CN 201921102449U CN 210460976 U CN210460976 U CN 210460976U
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stage
cylinder
compression
stage compression
exhaust
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陈文金
王卜
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Naili Compresser Co ltd
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Naili Compresser Co ltd
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Abstract

The utility model discloses an oil-free piston compressor of second grade compression, including the mount pad, fix the crankcase on the mount pad, fix on the mount pad and be located the motor of crankcase one side, fixed connection just is located the bent axle of crankcase in the motor power shaft, fixes one-level cylinder and the second grade cylinder on the crankcase respectively, rotates one-level piston and the second grade piston of connection on the bent axle through the connecting rod respectively, and the one-level cylinder cap and the second grade cylinder cap of closing in one-level cylinder and second grade cylinder upper end are sealed to the difference to and arrange the gas pipeline on the mount pad. The utility model has reasonable design of gas pipeline and good interstage cooling effect; the two-stage compression is adopted, the stress of the structural part of the air compressor is reduced, the service life of the air compressor is prolonged, the single-stage compression power is reduced by the two-stage progressive compression, and the interstage cooling structure is arranged for cooling, so that the heat generated by the compressed air of the air compressor is reduced.

Description

Oil-free piston type compressor with two-stage compression
Technical Field
The utility model relates to an oil-free piston compressor of second grade compression belongs to compressor equipment technical field.
Background
An air compressor, i.e., an air compressor, is a device for compressing gas. Air compressors are classified into two types, namely speed type and volume type, and the volume type air compressors include reciprocating type (such as piston type) and rotary type (such as sliding vane type, screw type and rotor type). Most air compressors are of the reciprocating piston type, rotating blades (vanes) or rotating screws. The piston compressor is a positive displacement compressor, the compression element of which is a piston reciprocating in the cylinder of the piston air compressor. And can be divided into an oil-lubricated air compressor and an oil-free lubricated air compressor according to the lubrication mode.
The oily piston air compressor that uses in current new forms of energy field is one-level (compression) air compressor machine mainly, and one-level (compression) air compressor machine built-in area is big, when reaching required compressed gas pressure, and not only the working stroke is long, and the pressure height in the air compressor machine moreover to following problem appears:
1. the stress of the air compressor is in direct proportion to the working pressure and the diameter of the piston, the stress of structural parts can be increased in proportion by increasing the air quantity of the air compressor or increasing the working pressure, the service life of the air compressor can be shortened after the structural parts such as the bearing, the bearing bush and the like exceed the range of the bearing force, or the weight of the air compressor with the same specification is increased greatly for increasing the strength.
2. The primary compression air compressor can generate heat when compressing air, and the larger the pressure ratio is, the more the generated heat is, and the higher the exhaust temperature is. The abrasion of piston rings and pistons is aggravated at high temperature, and the service life of the whole machine is shortened.
Aiming at the problems, the application of the secondary air compressor in the field of new energy buses is more and more extensive, and the secondary compression can reach a larger pressure ratio and can be more suitable for the development in the field. The second-stage compression is to connect the first-stage compression cavity and the second-stage compression cavity in series, and pressurize the air step by step to finally reach the required pressure. Natural air enters the first-stage compression cavity through the air filter, gas is compressed to interstage pressure, and after certain temperature reduction measures are taken, the part of compressed gas enters the second-stage compression cavity to be compressed for the second time to be compressed to the final exhaust pressure, so that the whole compression process is completed. The advantages of the (multi) two-stage compression are: 1. the work is saved, and the interstage cooling is adopted, so that the gas temperature is reduced, the volume of the compressed gas is reduced, and the compression work of the next stage is reduced; 2. reducing the discharge temperature limits the discharge temperature by limiting the various pressure ratios since the discharge temperature of the various compressors is limited and the discharge temperature is proportional to the [ 1-n)/n ] of the pressure ratio. 3. When the first-stage compression is performed, the volumetric efficiency is reduced to 0 after the pressure ratio reaches a certain value, and therefore the volumetric efficiency of the compressor can be improved through the second-stage compression. 4. The gas acting force is uniform and reduced, and the gas acting force can be reduced to 50% of that of the first-stage compression after the higher pressure ratio is divided into the second-stage compression (equal pressure ratio). )
However, the existing secondary air compressor has the following problems: an oil cooling structure is adopted, the oil path structure is complex, the precision of required parts is high, the production cost is high, and the maintenance is inconvenient; and the cooling effect of the air cooling structure is poor, and most interstage compressed air is not provided with a reasonable cooling structure, so that the problem of poor interstage cooling effect is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a through the free heat dissipation of interstage cooling tube, effectively reduce the compressed second grade's of interstage compressed gas temperature oil-free piston compressor.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a two-stage compression oil-free piston compressor comprises a mounting seat, a motor fixed on the mounting seat, a crankcase body fixed on the motor and positioned on two sides of the motor, a crankshaft fixedly connected to a power shaft of the motor and positioned in the crankcase body, a first-stage cylinder barrel and a second-stage cylinder barrel respectively fixed on the crankcase body, a first-stage piston and a second-stage piston respectively connected to the crankshaft in a rotating mode through connecting rods, a first-stage cylinder cover and a second-stage cylinder cover respectively covering the upper ends of the first-stage cylinder barrel and the second-stage cylinder barrel in a sealing mode, and a gas pipeline arranged on; the first-stage piston reciprocates in the first-stage cylinder barrel to perform first-stage compression on gas, and the second-stage piston reciprocates in the second-stage cylinder barrel to perform second-stage compression on gas.
As a further improvement, be provided with the carminative one-level valve plate of confession one-level compressed gas between one-level cylinder and the one-level cylinder cap, be provided with the carminative second grade valve plate of confession second grade compressed gas between second grade cylinder and the second grade cylinder cap.
As a further improvement of the utility model, the port of the crankcase body is fixedly connected with the crankcase cover, and a sealed space is formed inside the crankcase body;
and the first-stage piston is provided with a gas inlet valve for allowing gas in the crankshaft box to enter the first-stage cylinder barrel, and the second-stage piston is provided with a first-stage compressed gas inlet valve for allowing first-stage compressed gas to enter the second-stage cylinder barrel.
As a further improvement of the utility model, the crankcase body outside fixedly connected with wind scooper.
As a further improvement, the gas pipeline includes that fixed mounting just is located the tee bend piece of crankcase one side on the mount pad, and fixed mounting just is located the reposition of redundant personnel part of crankcase opposite side on the mount pad, connects two intake pipes on two ports of tee bend piece, and the one-level compressed gas vent of one-level cylinder cap and the interstage cooling pipeline a between the reposition of redundant personnel part are connected respectively at both ends, and the interstage cooling pipe c between reposition of redundant personnel part and the second grade cylinder is connected respectively at both ends to and connect the blast pipe on the second grade cylinder gas vent.
As a further improvement, the upper port of the three-way piece is an air inlet, and the other end of the air inlet pipe is communicated with the sealing space in the crankcase.
As a further improvement of the utility model, the reposition of redundant personnel part includes the reposition of redundant personnel body of bottom fixed connection on the mount pad, is located the cavity of reposition of redundant personnel internal portion, fixes the cavity and separates for the exhaust cavity on upper portion and the division board of the reposition of redundant personnel cavity of lower part, set up the reposition of redundant personnel through-hole that is used for communicateing interstage cooling pipeline at reposition of redundant personnel cavity lateral part, set up the exhaust through-hole that is used for communicateing the blast pipe at the exhaust cavity lateral part and set up the gas vent in the exhaust.
As a further improvement of the utility model, the number of the primary cylinder barrels is two, namely a primary compression cylinder a and a primary compression cylinder b;
the two secondary cylinder barrels are respectively a secondary compression cylinder c and a secondary compression cylinder d;
the two first-stage cylinder barrels and the two second-stage cylinder barrels are respectively located on two sides of the crankcase body.
As a further improvement of the utility model, the two air inlet pipes respectively comprise a first air inlet branch pipe communicated between one port of the three-way piece and the air inlet of the first-stage compression cylinder a and a second air inlet branch pipe communicated between the other port of the three-way piece and the air inlet of the first-stage compression cylinder b;
the interstage cooling pipeline a is communicated between the flow dividing chamber and an exhaust port of the first-stage compression cylinder a, and the interstage cooling pipe c is communicated between the flow dividing chamber and an intake port of the second-stage compression cylinder c;
an interstage cooling pipeline b is connected between the flow dividing chamber and an exhaust port of the first-stage compression cylinder b, and an interstage cooling pipeline d is connected between the flow dividing chamber and an air inlet of the second-stage compression cylinder d.
As a further improvement, the second grade compression cylinder c gas vent and second grade compression cylinder d gas vent are through two blast pipes intercommunication exhaust cavity.
Compared with the prior art, the utility model discloses the beneficial effect who gains as follows:
the utility model has reasonable design of gas pipeline and good interstage cooling effect; the two-stage progressive compression reduces the single-stage compression power, and an interstage cooling structure is arranged for cooling, so that the exhaust temperature of the air compressor is reduced; clean air of this during operation gets into the sealed crankcase body in both sides at first through the intake pipe, gaseous admission valve through setting up at the piston top gets into one-level compression chamber, gaseous getting into interstage cooling pipeline after the one-level compression, interstage cooling pipeline coils and sets up in the organism outside, one-level compressed gas is in the cooling pipeline in-process through the stage, the heat of one-level compressed gas dispels the heat to the air naturally, thereby reduce the temperature of one-level compressed gas, realize interstage cooling, then get into the second grade compression chamber, discharge through the exhaust pipe after the second grade compression. The complete machine is installed on the base, and fan and bumper shock absorber are installed simultaneously to this base, and the fan is used for the cooling to the cylinder cap, and the bumper shock absorber is used for vibration/noise reduction.
Drawings
FIG. 1 is a schematic view of an axial measurement structure in one direction of the present invention;
FIG. 2 is a schematic view of an axial measurement structure in another direction of the present invention;
fig. 3 is a schematic structural view of the power mechanism of the present invention;
FIG. 4 is a schematic sectional view taken along the line A of FIG. 3;
FIG. 5 is a schematic view of the internal structure of the flow distribution member of the present invention;
fig. 6 is a schematic block diagram of the gas flow direction of the present invention.
In the drawings:
the engine comprises a mounting base 1, a crankcase body 2, a crankcase cover 3, a wind scooper 4, a crankshaft 5, a motor 6, a fan 7, a connecting rod 8, a two-stage piston 9, a two-stage cylinder 10, a two-stage valve body 11, a two-stage cylinder cover 12, a one-stage piston 13, a one-stage cylinder 14, a one-stage valve plate 15, a one-stage cylinder cover 16, an air inlet 17, a first air inlet branch pipe 181, a second air inlet straight pipe 182, an interstage cooling pipe 19, an interstage cooling pipe 20, an exhaust pipe 21, an exhaust port 22, a flow dividing component 23, a partition plate 24, a fixed base 25 and a.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in the attached figures 1-6, a two-stage compression oil-free piston compressor comprises a mounting seat 1, a motor 6 fixed on the mounting seat 1, a crankcase 2 fixed on the motor 6 and positioned at two sides of the motor 6, a crankshaft 5 fixedly connected to a power shaft of the motor 6 and positioned in the crankcase 2, a first-stage cylinder 14 and a second-stage cylinder 10 respectively fixed on the crankcase 2, a first-stage piston 13 and a second-stage piston 9 respectively rotatably connected to the crankshaft 5 through a connecting rod 8, a first-stage cylinder cover 16 and a second-stage cylinder cover 12 respectively hermetically covered at the upper ends of the first-stage cylinder 14 and the second-stage cylinder 10, and a gas pipeline arranged on the mounting seat 1; the primary piston 13 reciprocates in the primary cylinder 14 to perform primary compression on the gas, and the secondary piston 9 reciprocates in the secondary cylinder 10 to perform secondary compression on the gas.
A first-stage valve plate 15 for exhausting first-stage compressed gas is arranged between the first-stage cylinder barrel 14 and the first-stage cylinder cover 16, and a second-stage valve plate 11 for exhausting second-stage compressed gas is arranged between the second-stage cylinder barrel 10 and the second-stage cylinder cover 12.
The port of the crankcase body 2 is fixedly connected with a crankcase cover 3, and a sealed space is formed inside the crankcase body 3;
the first-stage piston 13 is provided with a gas inlet valve for gas in the crankcase body 2 to enter the first-stage cylinder 14, and the second-stage piston 9 is provided with a first-stage compressed gas inlet valve for first-stage compressed gas to enter the second-stage cylinder 10.
And an air guide cover 4 is fixedly connected to the outer side of the crankcase body 2.
The gas pipeline comprises a three-way part 26 which is fixedly arranged on the mounting seat 1 and is positioned on one side of the crankcase body 2, a flow dividing part 23 which is fixedly arranged on the mounting seat 1 and is positioned on the other side of the crankcase body 2, two gas inlet pipes 18 which are connected to two ports of the three-way part 26, an interstage cooling pipeline a19 which is connected to two ends of the interstage cooling pipeline between a first-stage compressed gas exhaust port of the first-stage cylinder cover 16 and the flow dividing part 23, an interstage cooling pipe c20 which is connected to two ends of the interstage cooling pipeline between the flow dividing part 23 and the second-stage cylinder 10, and an exhaust.
The upper end of the three-way member 26 is an air inlet 17, and the other end of the air inlet pipe 18 communicates with a sealed space in the crankcase body 2.
The flow dividing component 23 comprises a flow dividing body 25, the bottom of which is fixedly connected to the mounting seat 1, a cavity positioned in the flow dividing body 25, a partition plate 24 fixed in the cavity and dividing the cavity into an upper exhaust chamber and a lower flow dividing chamber, a flow dividing through hole formed in the side part of the flow dividing chamber and used for communicating with an interstage cooling pipeline, an exhaust through hole formed in the side part of the exhaust chamber and used for communicating with an exhaust pipe 21, and an exhaust port 22 formed in the upper end of the exhaust chamber.
The flow dividing component integrates the interstage cooling pipeline and the exhaust port, so that the overall structure of the equipment is compact, the problem of mutual interference of pipeline arrangement is reduced, the pipeline arrangement is more tidy and concise, and the identification and the maintenance operation are facilitated.
The number of the first-stage cylinder barrels 14 is two, and the first-stage cylinder barrels are respectively a first-stage compression cylinder a and a first-stage compression cylinder b;
the two secondary cylinder barrels 10 are respectively a secondary compression cylinder c and a secondary compression cylinder d;
the two first-stage cylinders 14 and the two second-stage cylinders 10 are respectively located on both sides of the crankcase body 2.
The two air inlet pipes 18 respectively comprise a first air inlet branch pipe communicated between one port of the three-way piece 26 and an air inlet of the first-stage compression cylinder a, and a second air inlet branch pipe communicated between the other port of the three-way piece 26 and an air inlet of the first-stage compression cylinder b;
the interstage cooling pipeline a19 is communicated between the flow dividing chamber and the exhaust port of the first-stage compression cylinder a, and the interstage cooling pipe c20 is communicated between the flow dividing chamber and the intake port of the second-stage compression cylinder c;
an interstage cooling pipeline b is connected between the flow dividing chamber and an exhaust port of the first-stage compression cylinder b, and an interstage cooling pipeline d is connected between the flow dividing chamber and an air inlet of the second-stage compression cylinder d.
And the exhaust port of the second-stage compression cylinder c and the exhaust port of the second-stage compression cylinder d are communicated with an exhaust chamber through two exhaust pipes 21.
The working process of the utility model is as follows:
the motor 6 drives the crankshaft 5 to rotate after starting, through the transmission of the connecting rod 8, the first-stage piston and the second-stage piston do reciprocating motion, the working volume formed by the inner wall of the cylinder barrel, the valve plate and the top surface of the piston can change periodically, when the first-stage piston and the second-stage piston start to move from the cylinder cover side, the working volume in the cylinder barrel is gradually increased, at the moment, the gas is sucked through the gas valve at the side with increased volume due to the reduction of the air pressure, the gas pushes away the gas inlet valve along the gas inlet pipe to enter the cylinder barrel, and the gas inlet valve is closed until; when the piston moves reversely, the working volume in the cylinder barrel is reduced, the gas pressure is increased, when the pressure in the cylinder barrel reaches and is slightly higher than the exhaust pressure, the exhaust valve is opened, the gas is exhausted, and until the piston moves to the limit position, the exhaust valve is closed.
The utility model discloses gas flow direction process when carrying out gas compression is as follows:
when the engine works, clean air enters the tee joint piece 26 from the air inlet 17, enters the crankcase body 2 with two sealed sides through the first air inlet branch pipe and the second air inlet branch pipe which are connected to two ports of the tee joint piece 26, and then enters a first-stage compression cavity in the first-stage compression cylinder a and the first-stage compression cylinder b from an air inlet valve at the top of the first-stage piston 13 when the first-stage piston 13 corresponding to the first-stage compression cylinder a and the first-stage compression cylinder b respectively starts to move from the side of a first-stage cylinder cover; the gas after the first-stage compression of the first-stage compression cylinder a and the first-stage compression cylinder b converges in a shunting cavity of the shunting part through an interstage cooling pipe a and an interstage cooling pipe b respectively, and the heat of the first-stage compression gas is dissipated into the air when the first-stage compression gas passes through the interstage cooling pipe a and the interstage cooling pipe b; the first-stage compressed gas in the shunting chamber respectively enters a second-stage compression cylinder c and a second-stage compression cylinder d through an interstage cooling pipe c and an interstage cooling pipe d, and the heat of the first-stage compressed gas is radiated into the air again when the first-stage compressed gas passes through the interstage cooling pipe c and the interstage cooling pipe d; the gas after the second-stage compression of second-stage compression cylinder c and first-stage compression cylinder d converges to the exhaust chamber through exhaust pipe 21, and then is discharged through exhaust pipe 21, and the compressed gas discharged from exhaust pipe 21 is connected to the gas pipeline.
The utility model has reasonable design of gas pipeline and good interstage cooling effect; the two-stage compression is adopted, so that the stress of the structural part of the air compressor is reduced, the service life of the air compressor is prolonged, the two-stage progressive compression reduces the single-stage compression power, and the exhaust temperature of the air compressor is reduced; clean air of this during operation gets into the sealed crankcase body in both sides at first through the intake pipe, gaseous admission valve through setting up at the piston top gets into one-level compression chamber, gaseous getting into interstage cooling pipeline after the one-level compression, interstage cooling pipeline coils and sets up in the organism outside, one-level compressed gas is in the cooling pipeline in-process through the stage, the heat of one-level compressed gas dispels the heat to the air naturally, thereby reduce the temperature of one-level compressed gas, realize interstage cooling, then get into the second grade compression chamber, discharge through the exhaust pipe after the second grade compression. The complete machine is installed on the base, and fan and bumper shock absorber are installed simultaneously to this base, and the fan is used for the cooling to the cylinder cap, and the bumper shock absorber is used for vibration/noise reduction.
The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.

Claims (10)

1. The utility model provides an oil-free piston compressor of two-stage compression which characterized in that: the device comprises a mounting seat (1), a motor (6) fixed on the mounting seat (1), a crankcase body (2) fixed on the motor (6) and positioned at two sides of the motor (6), a crankshaft (5) fixedly connected to a power shaft of the motor (6) and positioned in the crankcase body (2), a first-stage cylinder barrel (14) and a second-stage cylinder barrel (10) respectively fixed on the crankcase body (2), a first-stage piston (13) and a second-stage piston (9) respectively connected to the crankshaft (5) in a rotating manner through a connecting rod (8), a first-stage cylinder cover (16) and a second-stage cylinder cover (12) respectively covered on the upper ends of the first-stage cylinder barrel (14) and the second-stage cylinder barrel (10) in a sealing manner, and a gas pipeline arranged on; the primary piston (13) reciprocates in the primary cylinder barrel (14) to perform primary compression on gas, and the secondary piston (9) reciprocates in the secondary cylinder barrel (10) to perform secondary compression on gas.
2. An oil-free piston compressor of two-stage compression as claimed in claim 1, wherein: a first-stage valve plate (15) for exhausting first-stage compressed gas is arranged between the first-stage cylinder barrel (14) and the first-stage cylinder cover (16), and a second-stage valve plate (11) for exhausting second-stage compressed gas is arranged between the second-stage cylinder barrel (10) and the second-stage cylinder cover (12).
3. An oil-free piston compressor of two-stage compression as claimed in claim 2, wherein: the port of the crankcase body (2) is fixedly connected with a crankcase cover (3), and a sealed space is formed inside the crankcase body (2);
the gas inlet valve for the gas in the crankcase body (2) to enter the first-stage cylinder barrel (14) is arranged on the first-stage piston (13), and the first-stage compressed gas inlet valve for the first-stage compressed gas to enter the second-stage cylinder barrel (10) is arranged on the second-stage piston (9).
4. An oil-free piston compressor of two-stage compression as claimed in claim 3, wherein: and an air guide cover (4) is fixedly connected to the outer side of the crankcase body (2).
5. An oil-free piston compressor of two-stage compression as claimed in claim 4, wherein: the gas pipeline comprises a three-way part (26) which is fixedly installed on the installation seat (1) and located on one side of the crankcase body (2), a shunt part (23) which is fixedly installed on the installation seat (1) and located on the other side of the crankcase body (2), two gas inlet pipes (18) which are connected to two ports of the three-way part (26), an interstage cooling pipeline a (19) which is connected to two ends of the interstage cooling pipeline between a first-stage compressed gas exhaust port of a first-stage cylinder cover (16) and the shunt part (23), an interstage cooling pipe c (20) which is connected to two ends of the interstage cooling pipe between the shunt part (23) and the second-stage cylinder barrel (10), and an exhaust pipe (21) which is.
6. An oil-free piston compressor of two-stage compression as claimed in claim 5, wherein: the upper end opening of the three-way piece (26) is an air inlet (17), and the other end of the air inlet pipe (18) is communicated with a sealed space in the crankcase body (2).
7. An oil-free piston compressor of two-stage compression as claimed in claim 6, wherein: the flow dividing component (23) comprises a flow dividing body (25) with the bottom fixedly connected to the mounting seat (1), a cavity located inside the flow dividing body (25), a partition plate (24) fixed in the cavity and used for dividing the cavity into an upper exhaust chamber and a lower flow dividing chamber, flow dividing through holes formed in the side portions of the flow dividing chambers and used for communicating the interstage cooling pipelines, exhaust through holes formed in the side portions of the exhaust chambers and used for communicating the exhaust pipes (21), and exhaust ports (22) formed in the upper ends of the exhaust chambers.
8. An oil-free piston compressor of two-stage compression as claimed in claim 7, wherein: the number of the first-stage cylinder barrels (14) is two, and the first-stage cylinder barrels are respectively a first-stage compression cylinder a and a first-stage compression cylinder b;
the two secondary cylinder barrels (10) are respectively a secondary compression cylinder c and a secondary compression cylinder d;
the two first-stage cylinder barrels (14) and the two second-stage cylinder barrels (10) are respectively positioned on two sides of the crankcase body (2).
9. An oil-free piston compressor of two-stage compression as claimed in claim 8, wherein: the two air inlet pipes (18) respectively comprise a first air inlet branch pipe communicated between one port of the three-way piece (26) and an air inlet of the first-stage compression cylinder a and a second air inlet branch pipe communicated between the other port of the three-way piece (26) and an air inlet of the first-stage compression cylinder b;
the interstage cooling pipeline a (19) is communicated between the flow dividing chamber and the exhaust port of the first-stage compression cylinder a, and the interstage cooling pipe c (20) is communicated between the flow dividing chamber and the intake port of the second-stage compression cylinder c;
an interstage cooling pipeline b is connected between the flow dividing chamber and an exhaust port of the first-stage compression cylinder b, and an interstage cooling pipeline d is connected between the flow dividing chamber and an air inlet of the second-stage compression cylinder d.
10. An oil-free piston compressor of two-stage compression as claimed in claim 9, wherein: and the exhaust port of the second-stage compression cylinder c and the exhaust port of the second-stage compression cylinder d are communicated with an exhaust chamber through two exhaust pipes (21).
CN201921102449.3U 2019-07-15 2019-07-15 Oil-free piston type compressor with two-stage compression Active CN210460976U (en)

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Application Number Priority Date Filing Date Title
CN201921102449.3U CN210460976U (en) 2019-07-15 2019-07-15 Oil-free piston type compressor with two-stage compression

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111828285A (en) * 2020-07-02 2020-10-27 北京建筑大学 Air compressor machine organism, cooling air pipe and air compressor machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111828285A (en) * 2020-07-02 2020-10-27 北京建筑大学 Air compressor machine organism, cooling air pipe and air compressor machine
CN111828285B (en) * 2020-07-02 2021-01-08 北京建筑大学 Air compressor machine organism, cooling air pipe and air compressor machine

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