CN110107473B

CN110107473B - Oil-free piston type air compressor for new energy vehicle

Info

Publication number: CN110107473B
Application number: CN201910289633.1A
Authority: CN
Inventors: 邬泽强; 王少鹏; 方优正; 章胡杰
Original assignee: Zhejiang Keli Vehicle Control System Co Ltd
Current assignee: Zhejiang Keli Vehicle Control System Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2021-06-18
Anticipated expiration: 2039-04-11
Also published as: CN110107473A

Abstract

The invention relates to the technical field of air compressors, and discloses an oil-free piston type air compressor for a new energy vehicle, which comprises a crankcase, a cylinder body and a cylinder head assembly, wherein a piston cylinder is arranged in the cylinder body, the cylinder body is arranged above the crankcase and is connected with the crankcase, the cylinder head assembly is arranged above the cylinder body and is connected with the cylinder body, a low-pressure heat exchanger connected with the crankcase is arranged on the front side of the cylinder body, a manifold block connected with the cylinder body is arranged at the right end of the cylinder body, the manifold block and the low-pressure heat exchanger are connected through a first water inlet pipe, a first water outlet is arranged at the left end of the low-pressure heat exchanger; the rear side of the cylinder body is provided with a high-pressure heat exchanger connected with the crankcase, the manifold block is connected with the high-pressure heat exchanger through a second water inlet pipe, the left end of the high-pressure heat exchanger is provided with a second water outlet, and the second water outlet is connected with the cylinder head assembly through a second water drain pipe. The invention adopts a water-cooling and air-cooling double-acting cooling mode, so that the cooling is sufficient and the effect is better.

Description

Oil-free piston type air compressor for new energy vehicle

Technical Field

The invention relates to the technical field of air compressors, in particular to an oil-free piston type air compressor for a new energy vehicle.

Background

The oil-free piston type air compressor for the new energy vehicle mainly comprises a crankcase, a cylinder body, a cylinder head, a motor, a crankshaft, a connecting rod, a piston, a cooling fan and other parts, and most of the existing oil-free piston type air compressors adopt a single-stage compression mode which is high in energy consumption and low in gas pressure; in addition, the existing oil-free piston type air compressors all adopt fans to perform forced air cooling heat dissipation, the heat dissipation effect is poor mainly by means of convection conduction heat dissipation, the heat exchange efficiency is low, the heat of internal moving parts such as a cylinder body, a cylinder head, particularly a connecting rod, a piston and the like of the air compressor is accumulated for a long time, the temperature cannot be quickly and effectively reduced, the service life of parts with relative friction motion such as the inner wall of the cylinder body, a piston ring, a bearing and the like is obviously reduced, and even bearing lubricating grease is ineffective and lost due to high temperature; secondly, the cooling effect of the windward side and the leeward side is different due to the cooling mode of the cooling fan, so that the cylinder body is deformed, and the friction is increased; in addition, the mounting environment of the air compressor inevitably has foreign matters such as dust, silt, water and the like, which easily causes the blockage of a fan, greatly reduces the blast volume, leads the cooling effect to become worse and worse, and finally influences the product performance, thus leading the service life to be shortened, the Chinese invention patent application (application number: 201610588870.4) discloses a piston type oilless air compressor for a two-stage compression vehicle, which comprises a motor, a filtering structure, a flywheel shaft, a low-pressure piston cylinder, a high-pressure piston cylinder, a low-pressure piston connecting rod component, a high-pressure piston connecting rod component, a low-pressure gas outlet valve plate component, a high-pressure gas outlet valve plate component, an inter; the low-pressure piston cylinder and the high-pressure piston cylinder are in horizontally opposite structures, and main parts of the engine body, such as the piston cylinder, the exhaust valve plate, the cylinder cover and the like, are cooled in a fan forced cooling mode. The cooling mode of the fan has the problem of insufficient cooling capacity, and inevitably has large difference of cooling effect between the windward side and the leeward side, which can seriously cause the inconsistent deformation of the machine body due to thermal expansion, influence the performance stability of the whole machine and shorten the service life. In addition, the inner part is not sufficient, heat is accumulated continuously to cause early wear of a piston ring and a guide sleeve, and bearing lubricating grease on a crankshaft connecting rod assembly is lost and loses efficacy to cause early wear of a bearing; compressed gas is cooled by a flat tube aluminum fin cold discharge cooler, so that the heat dissipation capacity is limited, and in addition, due to the high air flow rate, the compressed gas cannot be effectively dissipated in a short time, and the exhaust temperature is still high; in addition, an intercooler is arranged between the low-pressure piston cylinder and the high-pressure piston cylinder, when gas is cooled in the intercooler, water vapor in compressed air meets condensation and is collected in a radiator to form water drops, namely, an interstage cooling water separation phenomenon, and once condensed water enters the high-pressure piston cylinder, parts such as a cylinder wall, a piston and the like are seriously damaged.

Disclosure of Invention

Aiming at the defects of low efficiency, high energy consumption, high use and maintenance cost and short service life in the prior art, the invention provides the oil-free piston type air compressor for the new energy vehicle, which has high efficiency, low energy consumption, low use and maintenance cost and long service life.

In order to solve the technical problem, the invention is solved by the following technical scheme:

the oil-free piston type air compressor for the new energy vehicle comprises a crankcase, a cylinder body and a cylinder head assembly, wherein a piston cylinder is arranged in the cylinder body, the cylinder body is arranged above the crankcase and is connected with the crankcase, the cylinder head assembly is arranged above the cylinder body and is connected with the cylinder body, a low-pressure heat exchanger connected with the crankcase is arranged on the front side of the cylinder body, a manifold block connected with the cylinder body is arranged at the right end of the cylinder body, the manifold block and the low-pressure heat exchanger are connected through a first water inlet pipe, a first water outlet is arranged at the left end of the low-pressure heat exchanger, and the first water outlet; the rear side of the cylinder body is provided with a high-pressure heat exchanger connected with a crankcase, the manifold block and the high-pressure heat exchanger are connected through a second water inlet pipe, the left end of the high-pressure heat exchanger is provided with a second water outlet, the second water outlet is connected with the cylinder head assembly through a second water outlet pipe, a crankshaft main body connected with the crankcase is arranged in the crankcase, the crankshaft main body comprises a crankshaft disc and a shaft neck connected with the crankshaft disc, the shaft neck comprises a low-pressure shaft neck connected with a low-pressure piston and a high-pressure shaft neck connected with a high-pressure piston, the low-pressure shaft neck and the high-pressure shaft neck are respectively arranged on two sides of the crankshaft disc, the low-pressure shaft neck and the. Cooling water is divided into three paths in the manifold block, wherein one path enters the machine body from the side surface of the cylinder body, and the cooling water circularly cools the crank case, the cylinder body and the cylinder head assembly and then flows into the cylinder head assembly; the second path enters the low-pressure heat exchanger through the first water inlet pipe, and the cooling water of the second path rapidly cools the low-pressure compressed air and then flows into the cylinder head assembly through the first water discharge pipe; the third path enters the high-pressure heat exchanger through a second water inlet pipe, and the cooling water in the third path rapidly cools the high-pressure compressed air and then flows into the cylinder head assembly through a second water discharge pipe; this cooling system cooling efficiency is high, the radiating rate is fast, can effectively protect the key component of air compressor machine and prolong its life-span, low pressure axle journal and high-pressure axle journal symmetry are established at the both ends of the same diameter of reel, the tip and the reel of low pressure axle journal are connected, the balancing piece is installed to the tip of high pressure axle journal, the assembly is accomplished the back, make up through reel and remove the heavy, the focus of this technique is located the central axis of reel, can realize that this technique accurate dynamic balance after the assembly is accomplished matches, when the high-speed rotation of bent axle main part, its rotatory moment of inertia is close to zero, and certain inertia has, can make the air compressor machine have good acceleration performance under the unable condition of configurating the flywheel of air compressor machine.

Preferably, the cylinder head assembly comprises a cylinder cover connected with the cylinder body and a cylinder cover plate arranged above the cylinder cover, the cylinder cover plate is connected with the cylinder cover through screws, the cylinder cover is provided with a first water inlet connected with a first water drainage pipe and a second water inlet connected with a second water drainage pipe, an inner cavity which is sunken from top to bottom is arranged in the cylinder cover, the inner cavity and the cylinder cover plate form a cooling water cavity, the first water inlet and the second water inlet are respectively communicated with the cooling water cavity, a first water drainage port communicated with the first water inlet is arranged on the front side of the cylinder cover, and a second water drainage port communicated with the second water inlet is arranged on the rear side of the cylinder cover. When cooling water is collected in the cooling water cavity, a surrounding noise reduction water band is formed in the cylinder head assembly, so that the noise intensity of an exhaust noise source can be effectively absorbed and reduced, and the effects of noise reduction and noise reduction are achieved.

Preferably, a cylinder body water inlet communicated with the manifold block is formed in the right end of the cylinder body, the cylinder body comprises a cylinder body outer wall and a cylinder body inner wall which are sequentially arranged from outside to inside, the cylinder body is formed by surrounding the cylinder body outer wall, the piston cylinder is formed by surrounding the cylinder body inner wall, a water channel outer wall is arranged between the cylinder body outer wall and the cylinder body inner wall, a cooling water channel is formed between the cylinder body inner wall and the water channel outer wall, the cooling water channel is annularly arranged on the outer side of the piston cylinder along the cylinder body inner wall, a water channel reinforcing rib is arranged in the cooling water channel, and. The upper end of crankcase is equipped with the water course with piston cylinder complex, the water course is established in the below of cooling water course and is communicated with each other with the cooling water course, encircle the structural style who sets up the cooling water course at the piston cylinder outer wall, cooling water flows in the cooling water course and forms a cooling water jacket, utilize water-cooling heat exchange efficiency height, cool off rapid advantage can fully cool off the cylinder body, the water course strengthening rib increases the joint strength of cylinder body inner wall and water course outer wall, make the cylinder body still can normally work after can bearing great vibration, the life of extension cylinder body and the working strength of reinforcing cylinder body.

Preferably, the water channel reinforcing ribs comprise a first water channel reinforcing rib and a second water channel reinforcing rib, the upper end portion of the first water channel reinforcing rib is flush with the upper end of the inner wall of the cylinder body and the upper end of the outer wall of the water channel, the upper end portion of the second water channel reinforcing rib is lower than the upper end portion of the first water channel reinforcing rib, a top horizontal flow channel is arranged between the upper end of the outer wall of the water channel and the upper end of the inner wall of the cylinder body, and the top horizontal flow channel is arranged above the second water channel. The difference in height of first water course strengthening rib and second water course strengthening rib forms top horizontal flow channel, and the cooling water is in top horizontal flow channel, adjusts the velocity of flow of cooling water at top horizontal flow channel through first water course strengthening rib, prolongs the contact time of cooling water and cylinder body inner wall, improves the efficiency of cooling water heat exchange.

Preferably, the lower end parts of the water channel reinforcing ribs are flush, the lower end parts of the water channel reinforcing ribs are higher than the upper end parts of the water channel outer walls, bottom horizontal flow channels are arranged between the lower ends of the water channel outer walls and the lower ends of the cylinder body inner walls, the bottom horizontal flow channels are arranged below the water channel reinforcing ribs, the first water channel reinforcing ribs are uniformly distributed on the outer side of the piston cylinder, and the second water channel reinforcing ribs are arranged between the first water channel reinforcing ribs. Form the cooling chamber between each water course strengthening rib, the cooling water gets into the back from the water inlet and flows to each cooling intracavity through bottom horizontal runner, bottom horizontal runner has played the effect of homodisperse cooling water, form cooling jacket in cooling water piston cylinder periphery, make the cooling water can carry out the whole cooling to the piston cylinder, strengthen radiating effect, the piston cylinder includes big piston cylinder and little piston cylinder, the water course strengthening rib respectively with the structure looks adaptation of big piston cylinder and little piston cylinder, improve the utilization ratio of cooling water.

As preferred, be connected through the strengthening rib between water course outer wall and the cylinder body outer wall, strengthening rib, water course outer wall, cylinder body outer wall surround and form the sound insulation chamber, are equipped with the mount of being connected with the cylinder body in the sound insulation chamber, and the lower tip in mount flushes with the lower tip in sound insulation chamber, and the upper end of mount is established at the sound insulation intracavity, and the mount includes cylinder and the splice bar of being connected with the cylinder periphery, and the cylinder passes through the splice bar and is connected with the cylinder body, and the installation through-hole has been seted up. The periphery of the cooling water channel is provided with the sound insulation cavity, noise generated in the working process of the piston, the air inlet valve and the air outlet valve is effectively isolated and reduced by the sound insulation cavity, the working noise of the whole machine is obviously reduced, the connecting strength of the outer wall of the cylinder body and the outer wall of the water channel is enhanced through the fixing frame, the hollow cylinder and the connecting rib stroke of the fixing frame reduce noise transmission and vibration transmission carriers, and therefore the stability of the cylinder body in working is enhanced.

Preferably, the upper end of the crankcase is provided with a strip-shaped air inlet which is arranged from front to back, an air inlet joint connected with the crankcase is arranged above the strip-shaped air inlet, two sides of the upper end of the crankcase are provided with two air inlet channels which are arranged in parallel, the air inlet channels are transversely arranged from left to right, the left end part of each air inlet channel is communicated with the strip-shaped air inlet, the right side of the crankcase is provided with an air filter assembly connected with the crankcase, the air filter assembly comprises an air filter shell and an air filter element arranged in the inner cavity of the air filter shell, the two sides of the upper end of the air filter shell are provided with air filter inlets communicated with the right end of the air inlet channels, the air filter inlets are communicated with the inner cavity of the air filter. The intake air after external primary air filter primary filtration is inhaled through the air inlet joint, get into built-in air filter subassembly through crankcase upper portion both sides inlet channel and carry out the fine filtration at last, the air after the fine filtration gets into the crankcase, ensure to admit air clean, simultaneously carry out effective cooling to moving part and bearing in the air filter subassembly, the air filter subassembly is capacious, high filtering accuracy, dust and particle in can more effectual filtering intake as third level filter equipment, avoid causing wearing and tearing to moving part and bearing because of the impurity entering box in admitting air, can effectively prolong the complete machine life-span, the crankcase adopts two parallel inlet channel, the noise of admitting air has effectively been reduced, also conveniently simultaneously cools off the crankcase through admitting air.

Preferably, a low-pressure piston which moves up and down in the piston cylinder is arranged in the piston cylinder, a vent hole is formed in the top of the low-pressure piston, an air inlet valve plate which covers the vent hole is arranged above the vent hole, a pressing elastic sheet which is pressed on the air inlet valve plate is arranged above the air inlet valve plate, and the pressing elastic sheet is fixedly connected with the top of the low-pressure piston through a stop bolt. The air inlet valve block is provided with an air inlet elastic sheet covering the air vent, after fine filtration of the air filter component, air pushes the air inlet elastic sheet on the air inlet valve block through the low-pressure piston to enter the low-pressure cylinder of the piston cylinder, and on the whole air inlet passage, sucked air effectively cools the moving part and the bearing flowing through one by one, so that the service life of the moving part and the bearing is prolonged, and the working stability of the moving part and the bearing is improved.

Preferably, a valve plate is arranged between the cylinder cover and the cylinder body, a low-pressure valve plate and a high-pressure valve plate are arranged on the valve plate, the low-pressure valve plate and the high-pressure valve plate are arranged above the piston cylinder in a matched manner, four low-pressure exhaust holes are uniformly distributed and arranged in a square manner, a high-pressure exhaust hole is arranged on the high-pressure valve plate, a low-pressure exhaust valve plate fixedly connected with the low-pressure valve plate is arranged on the upper end face of the low-pressure valve plate, the low-pressure exhaust valve plate covers the low-pressure exhaust holes, a high-pressure exhaust valve plate fixedly connected with the high-pressure valve plate is arranged on the upper end face of the high-pressure valve plate, a first high-pressure air inlet cavity sunken from top to bottom and a high-pressure air inlet at the bottom of the first high-pressure air inlet cavity are also arranged on, the high-pressure air inlet valve plate covers the lower part of the high-pressure air inlet. The low-pressure exhaust valve plate, the high-pressure exhaust valve plate and the high-pressure air inlet valve plate are all fixed on the valve plate through rivets, and the fixing mode is simple in mechanism, firm and reliable, capable of preventing loosening, smaller in installation space and easier to realize automatic press mounting; the low-pressure piston moves upwards in the piston cylinder to compress air in a low-pressure piston cylinder in the piston cylinder, the low-pressure compressed air pushes away a low-pressure exhaust valve plate on the low-pressure valve plate after reaching exhaust pressure and enters a low-pressure heat exchanger through a cylinder cover, the low-pressure compressed air after being cooled pushes away a high-pressure intake valve plate downwards through a first high-pressure intake cavity through the cylinder cover and enters a high-pressure piston cylinder in the piston cylinder, the high-pressure piston moves upwards in the high-pressure piston cylinder to compress sucked compressed air from the low-pressure cylinder to the exhaust pressure, and after the high-pressure piston moves to an upper stop point, gas in the cylinder is compressed into high-pressure compressed air to push away the high-pressure exhaust valve plate and then enters the high-.

Preferably, a low-pressure exhaust cavity, a high-pressure exhaust cavity and a second high-pressure air inlet cavity are arranged on the cylinder cover from bottom to top, the low-pressure exhaust cavity is arranged above the low-pressure exhaust valve plate, the high-pressure exhaust cavity is arranged above the high-pressure exhaust valve plate, the second high-pressure air inlet cavity is arranged above the first high-pressure air inlet cavity and is communicated with the first high-pressure air inlet cavity, a low-pressure exhaust channel communicated with the low-pressure exhaust cavity is arranged at the front end of the cylinder cover, the low-pressure exhaust channel is connected with the upper end of the right side of the low-pressure heat exchanger through a low-pressure cylinder exhaust pipe, a high-pressure air inlet channel communicated with the second high-pressure air inlet cavity is arranged at the right end of the cylinder cover, the high-pressure air inlet channel is connected with the lower end of the right side of the low-, the lower end on the right side of the high-pressure heat exchanger is provided with an exhaust port. The low-pressure compressed air pushes away the low-pressure air exhaust valve plates on the low-pressure valve plate after reaching the air exhaust pressure and then enters a low-pressure heat exchanger for cooling through a low-pressure air exhaust cavity, a low-pressure air exhaust channel and a low-pressure cylinder air exhaust pipe in sequence, the low-pressure compressed air after being cooled sequentially passes through a high-pressure cylinder air inlet pipe, a high-pressure air inlet channel, a second high-pressure air inlet cavity and a first high-pressure air inlet cavity and pushes away the high-pressure air inlet valve plates downwards to enter a high-pressure piston cylinder in a piston cylinder, after the high-pressure piston moves to an upper dead point, gas in the cylinder is compressed into high-pressure compressed air to push away the high-pressure air exhaust valve plates, then the high-pressure air exhaust channel and the high-pressure.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the novel straight-line double-cylinder two-stage compression structure is a water-cooling and air-cooling double-loop cooling complete machine, and a novel crankcase, a cylinder body, a cylinder cover, a valve plate, an air inlet structure, a combined crankshaft, an integral connecting rod, an air inlet and outlet valve, an interstage heat exchanger and a final cooling heat exchanger are designed; the novel 'complete machine water cooling and compressed gas two-stage water cooling' cooling system is adopted, air cooling assistance of an air inlet structure is matched, the cooling effect is excellent, local high temperature cannot occur in the working process, and the exhaust temperature is lower, so that the service life of a piston ring is prolonged, and the lubricating grease amount in a bearing can be ensured to be in the optimal lubricating state all the time; the novel crankcase is adopted, the crankcase is provided with an internal air inlet channel, air inlet noise is effectively reduced, a unique piston cylinder structure is adopted, the piston cylinder is provided with an encircling cooling water channel and an independent sound insulation cavity, noise is reduced while effective cooling is carried out on the whole engine, a built-in air filter with larger capacity is integrated, and air inlet cleanness is ensured.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic view of a first perspective structure of the cylinder head.

Fig. 4 is a second perspective view of the cylinder head.

Fig. 5 is a schematic top view of the valve plate.

Fig. 6 is a schematic view of the valve plate in a bottom view.

Fig. 7 is a schematic top view of the cylinder.

Fig. 8 is a schematic view of the structure of the cylinder from below.

Fig. 9 is a first perspective view of the cylinder.

Fig. 10 is a second perspective view of the cylinder.

Fig. 11 is a third perspective view of the cylinder.

Fig. 12 is a schematic perspective view of the low pressure piston.

Fig. 13 is a perspective view of the crankcase.

Fig. 14 is a perspective view of the air filter assembly.

FIG. 15 is a schematic view of the internal structure of the crankcase and cylinder block

Fig. 16 is a partially enlarged view of a portion M in fig. 14.

Fig. 17 is a partially enlarged view of the portion N in fig. 14.

Fig. 18 is a partially enlarged view of a portion O in fig. 14.

Fig. 19 is a partially enlarged view of a portion P in fig. 14.

Fig. 20 is a partially enlarged view of a portion I in fig. 14.

Fig. 21 is a schematic structural view of the crankshaft main body.

Fig. 22 is a schematic structural view of the hub.

Fig. 23 is a schematic structural view of the weight.

Fig. 24 is a schematic view of an assembled structure of the hub and the left roller bearing.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-crankcase, 2-cylinder, 3-cylinder head component, 4-piston cylinder, 5-low pressure heat exchanger, 6-manifold block, 7-first water inlet pipe, 8-first water outlet, 9-first water outlet pipe, 10-high pressure heat exchanger, 11-second water inlet pipe, 12-second water outlet, 13-second water outlet pipe, 14-cylinder cover, 15-cylinder cover plate, 16-screw, 17-first water inlet, 18-second water inlet, 19-inner chamber, 20-cooling water chamber, 21-first water outlet, 22-second water outlet, 23-bar air inlet, 24-air inlet joint, 25-air inlet channel, 26-air filter component, 27-air filter shell, 28-air filter core, 29-air filter air inlet, 30-air filter air outlet, 31-cylinder water inlet, 32-cylinder outer wall, 33-cylinder inner wall, 34-water channel outer wall, 35-cooling water channel, 36-water channel reinforcing rib, 33-water channel reinforcing rib, and piston cylinder head component, 37-top horizontal flow passage, 38-bottom horizontal flow passage, 39-reinforcing rib, 40-sound insulation cavity, 41-fixing frame, 42-cylinder, 43-connecting rib, 44-installation through hole, 45-low pressure piston, 46-vent hole, 47-air inlet valve plate, 48-pressing elastic sheet, 49-valve plate, 50-low pressure valve plate, 51-high pressure valve plate, 52-low pressure exhaust hole, 53-high pressure exhaust hole, 54-low pressure exhaust valve plate, 55-high pressure exhaust valve plate, 56-first high pressure air inlet cavity, 57-high pressure air inlet hole, 58-low pressure exhaust cavity, 59-high pressure exhaust cavity, 60-second high pressure air inlet cavity, 61-low pressure exhaust channel, 62-high pressure exhaust channel, 63-exhaust hole, 64-first water channel reinforcing rib, 65-second water channel reinforcing rib, 66-high pressure air inlet valve plate, 67-high pressure air inlet channel, 68-low pressure cylinder exhaust pipe, 69-high pressure cylinder air inlet pipe, 70-high pressure cylinder exhaust pipe, 71-water inlet, 72-water channel, 73-high pressure piston, 74-crankshaft body, 75-crank disk, 76-journal, 77-low pressure journal, 78-high pressure journal, 79-first roller bearing seat, 80-shaft disk, 81-first threaded hole, 82-first bolt, 83-first bolt head, 84-bolt hole, 85-lock washer, 86-shaft disk mounting seat, 87-first deep groove ball bearing seat, 88-first step surface, 89-mounting hole, 90-second deep groove ball bearing seat, 91-second step surface, 92-balance block, 93-second threaded hole, 94-second bolt, 95-circular mounting seat, 96-flat washer, 97-connecting part, 98-fan-balance part, 99-second bolt head, 100-through hole, 101-upper groove, 102-lower groove, 103-balance weight hole, 104-second roller bearing, 105-left roller bearing, 106-mounting groove, 107-first supporting sleeve, 108-first gland, 109-first sealing groove, 110-first sealing ring, 111-second sealing groove, 112-second sealing ring, 113-low pressure connecting rod, 114-first deep groove ball bearing, 115-first cover plate, 116-first screw, 117-first adjusting ring, 118-high pressure connecting rod, 119-second deep groove ball bearing, 120-second cover plate, 121-second screw, 122-second adjusting ring, 123-right roller bearing, 124-second supporting sleeve, 125-third sealing groove, 126-third sealing ring, 127-second gland, 128-fourth sealing groove, 129-fourth sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

An oil-free piston type air compressor for a new energy vehicle is shown in fig. 1 to 24 and comprises a crankcase 1, a cylinder body 2 and a cylinder head assembly 3, wherein a piston cylinder 4 is arranged in the cylinder body 2, the cylinder body 2 is arranged above the crankcase 1 and connected with the crankcase 1, the cylinder head assembly 3 is arranged above the cylinder body 2 and connected with the cylinder body 2, a low-pressure heat exchanger 5 connected with the crankcase 1 is arranged on the front side of the cylinder body 2, a manifold block 6 connected with the cylinder body 2 is arranged at the right end of the cylinder body 2, the manifold block 6 is connected with the low-pressure heat exchanger 5 through a first water inlet pipe 7, a first water outlet 8 is arranged at the right end of the low-pressure heat exchanger 5, and the first water outlet 8 is; the rear side of the cylinder body 2 is provided with a high-pressure heat exchanger 10 connected with the crankcase 1, the manifold block 6 is connected with the high-pressure heat exchanger 10 through a second water inlet pipe 11, the rear end of the high-pressure heat exchanger 10 is provided with a second water outlet 12, and the second water outlet 12 is connected with the cylinder head assembly 3 through a second water drain pipe 13. A water inlet 71 is arranged on the rear end face of the manifold block 6, cooling water of a main path water cooling system enters the manifold block 6 through the water inlet 71, the cooling water is divided into three paths in the manifold block 6, one path enters the machine body from the side face of the cylinder body 2, and the cooling water circularly cools the crank case 1, the cylinder body 2 and the cylinder head assembly 3 and then flows into the cylinder head assembly 3; the second path enters the low-pressure heat exchanger 5 through a first water inlet pipe 7, and the cooling water rapidly cools the low-pressure compressed air and then flows into the cylinder head assembly 3 through a first water outlet pipe 9; the third path enters the high-pressure heat exchanger 10 through a second water inlet pipe 11, and the cooling water in the third path rapidly cools the high-pressure compressed air and then flows into the cylinder head assembly 3 through a second water discharge pipe 13; the cooling system is high in cooling efficiency and high in heat dissipation speed, and can effectively protect key parts of the air compressor and prolong the service life of the key parts.

The cylinder head assembly 3 comprises a cylinder cover 14 connected with the cylinder body 2 and a cylinder cover plate 15 arranged above the cylinder cover 14, the cylinder cover plate 15 is connected with the cylinder cover 14 through screws 16, the cylinder cover 14 is provided with a first water inlet 17 connected with the first water discharge pipe 9 and a second water inlet 18 connected with the second water discharge pipe 13, an inner cavity 19 which is sunken from top to bottom is arranged in the cylinder cover 14, the inner cavity 19 and the cylinder cover plate 15 form a cooling water cavity 20, the cooling water cavity 20 is respectively communicated with the first water inlet 17 and the second water inlet 18, a first water discharge port 21 communicated with the first water inlet 17 is arranged on the front side of the cylinder cover 14, and a second water discharge port 22 communicated with the second water inlet 18 is arranged on the rear side of the cylinder cover 14. When the cooling water is collected in the cooling water cavity 20, a surrounding noise reduction water band is formed in the cylinder head assembly 3, so that the noise intensity of an exhaust noise source can be effectively absorbed and reduced, and the effects of noise reduction and noise reduction are achieved.

The right end of cylinder body 2 is equipped with cylinder body water inlet 31 that communicates with each other with manifold block 6, cylinder body 2 includes cylinder body outer wall 32 and cylinder body inner wall 33 that sets gradually from outer to inner, cylinder body 2 is enclosed by cylinder body outer wall 32 and is formed, piston cylinder 4 is enclosed by cylinder body inner wall 33 and is formed, be equipped with water course outer wall 34 between cylinder body outer wall 32 and the cylinder body inner wall 33, form cooling water course 35 between cylinder body inner wall 33 and the water course outer wall 34, cooling water course 35 sets up the outside at piston cylinder 4 along cylinder body inner wall 33 annular, be equipped with water course strengthening rib 36 in the cooling water course 35, the both sides of water course strengthening rib 36 are connected with cylinder body inner. The upper end of the crankcase 1 is provided with a water channel 72 matched with the piston cylinder 4, the water channel 72 is arranged below the cooling water channel 35 and communicated with the cooling water channel 35, the outer wall of the piston cylinder 4 is surrounded by the structure type of the cooling water channel 35, cooling water flows in the cooling water channel 35 to form a cooling water jacket, the cylinder body can be fully cooled by utilizing the advantages of high water-cooling heat exchange efficiency and rapid cooling, the water channel reinforcing ribs 36 increase the connection strength of the inner wall 33 of the cylinder body and the outer wall 34 of the water channel, the cylinder body 2 can still normally work after being subjected to large vibration, the service life of the cylinder body 2 is prolonged, and the working strength of the cylinder body 2 is enhanced.

The water channel reinforcing ribs 36 include a first water channel reinforcing rib 64 and a second water channel reinforcing rib 65, the upper end portion of the first water channel reinforcing rib 64 is flush with the upper end of the cylinder body inner wall 33 and the upper end of the water channel outer wall 34, the upper end portion of the second water channel reinforcing rib 65 is lower than the upper end portion of the first water channel reinforcing rib 64, a top horizontal flow channel 37 is arranged between the upper end of the water channel outer wall 34 and the upper end of the cylinder body inner wall 33, and the top horizontal flow channel 37 is arranged above the second water channel reinforcing rib 65. The height difference between the first water channel reinforcing ribs 64 and the second water channel reinforcing ribs 65 forms the top horizontal flow channel 37, the flow speed of the cooling water in the top horizontal flow channel 37 is adjusted through the first water channel reinforcing ribs 64 in the top horizontal flow channel 37, the contact time of the cooling water and the inner wall 33 of the cylinder body is prolonged, and the heat exchange efficiency of the cooling water is improved.

The lower end portions of the water channel reinforcing ribs 36 are flush, the lower end portions of the water channel reinforcing ribs 36 are higher than the upper end portions of the water channel outer walls 34, bottom horizontal flow channels 38 are arranged between the lower ends of the water channel outer walls 34 and the lower ends of the cylinder body inner walls 33, the bottom horizontal flow channels 38 are arranged below the water channel reinforcing ribs 36, the first water channel reinforcing ribs 64 are uniformly distributed on the outer side of the piston cylinder 4, and the second water channel reinforcing ribs 65 are arranged between the first water channel reinforcing ribs 64. Form the cooling chamber between each water course strengthening rib 36, the cooling water gets into the back from water inlet 31 and flows to each cooling intracavity through bottom horizontal runner 38, bottom horizontal runner 38 has played the effect of homodisperse cooling water, form cooling jacket at cooling water piston cylinder 4 periphery, make the cooling water can carry out the body cooling to piston cylinder 4, strengthen radiating effect, piston cylinder 4 includes big piston cylinder and little piston cylinder, water course strengthening rib 36 respectively with the structure looks adaptation of big piston cylinder and little piston cylinder, improve the utilization ratio of cooling water.

During operation, after cooling water entered the cooling water course 35 through water inlet 31, earlier along the horizontal runner 38 of bottom around the water course outer wall 34 from little piston cylinder flow direction big piston cylinder, after the horizontal runner 38 of bottom was full of the cooling water, the cooling water evenly rises along a plurality of cooling chamber inner walls in step, heat exchange is carried out between the outer wall of the ascending in-process of cooling water and piston cylinder 4, take away the heat that the compression process produced rapidly, make piston cylinder 4, the piston, piston ring operating temperature remain in lower scope all the time, the exhaust temperature that the temperature reduction of piston cylinder 4 can make compressed air is also lower, the wearing and tearing speed of piston ring correspondingly also can descend by a wide margin, play the effect of extension piston ring life-span.

Example 2

Oil-free piston type air compressor for new energy vehicle, as shown in fig. 1 to fig. 24, on the basis of embodiment 1, be connected through strengthening rib 39 between water course outer wall 34 and the cylinder body outer wall 32, strengthening rib 39, water course outer wall 34, cylinder body outer wall 32 surround and form sound insulation chamber 40, be equipped with the mount 41 of being connected with cylinder body 2 in the sound insulation chamber 40, the lower tip of mount 41 flushes with the lower tip in sound insulation chamber 40, the upper end of mount 41 is established in sound insulation chamber 40, mount 41 includes cylinder 42 and the peripheral splice bar 43 of being connected with cylinder 42, cylinder 42 is connected with cylinder body 2 through splice bar 43, installation through-hole 44 has been seted up at the middle part of cylinder 42. The sound insulation cavity 40 is arranged at the periphery of the cooling water channel 35, noise generated by the piston, the air inlet valve and the air outlet valve in the working process is effectively isolated and reduced by the sound insulation cavity 40, the working noise of the whole machine is obviously reduced, the connecting strength of the cylinder outer wall 32 and the water channel outer wall 34 is enhanced through the fixing frame 41, the stroke of the fixing frame 41 is formed by the hollow cylinder 42 and the connecting rib 43, the noise transmission and vibration transmission carriers are reduced, and therefore the stability of the cylinder body 2 in working is enhanced.

Example 3

As shown in fig. 1 to 24, on the basis of embodiment 2, a strip-shaped air inlet 23 is arranged at the upper end of a crankcase 1 from front to back, an air inlet joint 24 connected with the crankcase 1 is arranged above the strip-shaped air inlet 23, two parallel air inlet passages 25 are arranged on two sides of the upper end of the crankcase 1, the air inlet passages 25 are transversely arranged from left to right, the left end of each air inlet passage 25 is communicated with the strip-shaped air inlet 23, an air filter assembly 26 connected with the crankcase 1 is arranged on the right side of the crankcase 1, the air filter assembly 26 comprises an air filter housing 27 and an air filter element 28 arranged in an inner cavity of the air filter housing 27, air filter air inlets 29 communicated with the right end of the air inlet passages 25 are arranged on two sides of the upper end of the air filter housing 27, the air filter air inlets 29 are communicated with the inner cavity of the air filter housing 27, an air filter inlet 30 is arranged in the middle of the air filter element 28. The air inlet gas after the external primary air filter primary filtration is sucked through the air inlet connector 24, the air inlet gas enters the built-in air filter assembly 26 through the air inlet channels 25 on the two sides of the upper portion of the crankcase 1 to be finally filtered, the air after the fine filtration enters the crankcase 1 to ensure the cleanness of the air inlet, meanwhile, the moving part and the bearing in the air filter assembly 26 are effectively cooled, the air filter assembly 26 is large in capacity and high in filtering precision, dust and particles in the air inlet can be more effectively filtered as a third-stage filtering device, the situation that the moving part and the bearing are abraded due to the fact that impurities in the air inlet enter the crankcase is avoided, the service life of the whole engine can be effectively prolonged, the crankcase is provided with the two parallel air inlet channels 25, the air inlet noise is effectively reduced, and meanwhile.

The piston cylinder 4 is internally provided with a low-pressure piston 45 which moves up and down in the piston cylinder 4, the top of the low-pressure piston 45 is provided with a vent hole 46, an air inlet valve plate 47 which covers the vent hole 46 is arranged above the vent hole 46, a pressing elastic sheet 48 which is pressed on the air inlet valve plate 47 is arranged above the air inlet valve plate 47, and the pressing elastic sheet 48 is fixedly connected with the top of the low-pressure piston 45 through a stop bolt. The air inlet valve plate 47 is provided with an air inlet elastic sheet covering the vent hole 46, after fine filtration by the air filter assembly 26, air is pushed by the low-pressure piston 45 to open the air inlet elastic sheet on the air inlet valve plate 47 to enter the low-pressure cylinder of the piston cylinder 4, the sucked air effectively cools the moving parts and the bearing which flow through one by one on the whole air inlet passage, the compression elastic sheet 48 is in a cross shape, the elasticity of the air inlet elastic sheet on the air inlet valve plate 47 is ensured while the air inlet valve plate 47 is compressed, the air inlet valve plate 47 on the low-pressure piston 45 is fixed in a combined fixing mode of a corrosion-resistant stop bolt and a looseness-proof washer, multiple protection is realized, the fastening bolt is ensured not to loosen due to high-speed reciprocating motion or vibration of the piston, and the possibility of faults such as clamping stagnation or cylinder collision caused by falling of.

A valve plate 49 is arranged between the cylinder cover 14 and the cylinder body 2, the valve plate 49 is connected between the cylinder cover 14 and the cylinder body 2 through a connecting bolt, the connecting bolt penetrates through the cylinder cover 14 and the valve plate 49 and is connected with the cylinder body 2, a low-pressure valve plate 50 and a high-pressure valve plate 51 are arranged on the valve plate 49, the low-pressure valve plate 50 and the high-pressure valve plate 51 are arranged above the piston cylinder 4 in a matching manner, four low-pressure exhaust holes 52 which are uniformly distributed in a square manner are arranged on the low-pressure valve plate 50, high-pressure exhaust holes 53 are arranged on the high-pressure valve plate 51, a low-pressure exhaust valve plate 54 fixedly connected with the low-pressure valve plate 50 is arranged on the upper end face of the low-pressure valve plate 50, the low-pressure exhaust valve plate 54 covers the upper part of the low-pressure exhaust holes 52, a high-pressure exhaust valve plate 55 fixedly connected with the high-pressure valve, the high-pressure air inlet hole 57 and the first high-pressure air inlet cavity 56 are both arranged on the right side of the high-pressure air outlet hole 53, the lower end face of the high-pressure valve plate 51 is provided with a high-pressure air inlet valve plate 66 fixedly connected with the high-pressure valve plate 51, and the high-pressure air inlet valve plate 66 covers the lower part of the high-pressure air inlet hole 57. The low-pressure exhaust valve plate 54, the high-pressure exhaust valve plate 55 and the high-pressure intake valve plate 66 are all fixed on the valve plate 49 through rivets, and the fixing mode mechanism is simple, firm and reliable, can prevent loosening, has smaller installation space and is easier to realize automatic press mounting; the low-pressure piston 45 moves upwards in the piston cylinder 4 to compress air in a low-pressure piston cylinder in the piston cylinder 4, the low-pressure compressed air pushes away a low-pressure exhaust valve plate 54 on a low-pressure valve plate 50 after reaching exhaust pressure and enters a low-pressure heat exchanger 5 through a cylinder cover 14 to be cooled, the low-pressure compressed air pushes away a high-pressure intake valve plate 66 downwards through a first high-pressure intake cavity 56 through the cylinder cover 14 after being cooled and enters a high-pressure piston cylinder in the piston cylinder 4, the high-pressure piston 73 moves upwards in the high-pressure piston cylinder to compress sucked compressed air from the low-pressure cylinder to exhaust pressure, and after the high-pressure piston 73 moves to an upper stop point, the gas in the cylinder is compressed into high-pressure compressed air to push away a high-pressure exhaust valve plate 55 and then enters the high-pressure heat.

A low-pressure exhaust cavity 58, a high-pressure exhaust cavity 59 and a second high-pressure air inlet cavity 60 which are concave from bottom to top are arranged on the cylinder cover 14, the low-pressure exhaust cavity 58 is arranged above the low-pressure exhaust valve plate 54, the high-pressure exhaust cavity 59 is arranged above the high-pressure exhaust valve plate 55, the second high-pressure air inlet cavity 60 is arranged above the first high-pressure air inlet cavity 56 and communicated with the first high-pressure air inlet cavity 56, a low-pressure exhaust channel 61 communicated with the low-pressure exhaust cavity 58 is arranged at the front end of the cylinder cover 14, the low-pressure exhaust channel 61 is connected with the upper end of the right side of the low-pressure heat exchanger 5 through a low-pressure exhaust pipe 68, a high-pressure air inlet channel 67 communicated with the second high-pressure air inlet cavity 60 is arranged at the right end of the cylinder cover 14, the high-pressure air inlet channel 67 is connected with the lower end of the right side of the low-pressure heat exchanger 5 through a high, the right lower end of the high pressure heat exchanger 10 is provided with an exhaust port 63. The low-pressure compressed air reaches the exhaust pressure, then pushes away the low-pressure exhaust valve plates 54 on the low-pressure valve plate 50, enters the low-pressure heat exchanger 5 through the low-pressure exhaust cavity 58, the low-pressure exhaust channel 61 and the low-pressure cylinder exhaust pipe 68 in sequence for cooling, the low-pressure compressed air pushes away the high-pressure intake valve plates 66 downwards through the high-pressure cylinder intake pipe 69, the high-pressure intake channel 67, the second high-pressure intake cavity 60 and the first high-pressure intake cavity 56 in sequence after cooling, enters the high-pressure piston cylinder in the piston cylinder 4, the high-pressure piston 73 moves to the top dead center, the gas in the cylinder is compressed into high-pressure compressed air to push away the high-pressure exhaust valve plates 55, then enters the high-pressure heat exchanger 10 through the high-pressure exhaust cavity 59, the high-pressure exhaust channel 62 and the high-pressure. The low-pressure heat exchanger 5 and the high-pressure heat exchanger 10 are both shell-and-tube coolers, namely shell-and-tube structures formed by welding a thin-shell box structure and a plurality of rows of bent pipes, cooling liquid is continuously injected into the thin-shell box, high-temperature gas is introduced into the bent pipes, and heat is transferred to the cooling liquid through the pipe walls of the bent pipes.

The whole machine of the technology adopts a water cooling and air cooling double-acting cooling mode, so that the machine is fully cooled, the effect is better, the working temperature is low, the performance is stable and reliable, the machine can continuously run for a long time, and the service life is longer; the cylinder body 2 adopts a multi-layer multi-cavity structure, and is combined with a cylinder cover water cavity structure to form a silencing cavity, so that noise generated in the air valve compression process is effectively isolated and reduced, and the effect of low noise and silence is achieved.

Example 4

As shown in fig. 1 to 24, on the basis of embodiment 3, the oil-free piston type air compressor for a new energy vehicle includes a crankshaft main body 74, where the crankshaft main body 74 includes a crank disk 75 and a journal 76 connected to the crank disk 75, the journal 76 includes a low-pressure journal 77 connected to the low-pressure piston 45 and a high-pressure journal 78 connected to the high-pressure piston 73, the low-pressure journal 77 and the high-pressure journal 78 are respectively disposed on two sides of the crank disk 75, the low-pressure journal 77 and the high-pressure journal 78 are respectively eccentrically disposed on two sides of the crank disk 75, and the low-pressure journal 77 and the high-pressure journal 78 are arranged in parallel. The both ends at the same diameter of reel 80 are established to low pressure axle journal 77 and high pressure axle journal 78 symmetry, the tip and the reel 80 of low pressure axle journal 77 are connected, balancing piece 92 is installed to the tip of high pressure axle journal 78, after the assembly is accomplished, make up through reel 80 and crankshaft disk 75 and remove the heavy, the focus of this technique is located the central axis of crankshaft disk 75, can realize the accurate dynamic balance matching of this technique after the assembly is accomplished, when crankshaft main part 74 rotates at a high speed, its rotatory inertia moment approaches to zero, and certain inertia has, can make the air compressor machine have good acceleration performance under the condition that the air compressor machine can't dispose the flywheel.

The right side of the crank disk 75 is provided with a first roller bearing seat 79 concentrically disposed with the crank disk 75, the cylindrical diameter of the crank disk 75 is larger than that of the first roller bearing seat 79, and a low pressure journal 77 is connected with the first roller bearing seat 79 and eccentrically disposed on the first roller bearing seat 79. The right roller bearing 123 is conveniently arranged on the first roller bearing seat 79, so that the crank disk 75 is arranged in the crank case 1 through the right roller bearing 123, the internal structure is more compact, and the installation space is saved.

The end of the low-pressure journal 77 is provided with a shaft disc 80 connected with the low-pressure journal 77, the shaft disc 80 is sleeved on the low-pressure journal 77, a first threaded hole 81 is formed in the low-pressure journal 77, the shaft disc 80 is screwed in the first threaded hole 81 through a first bolt 82 and is connected with the low-pressure journal 77, a bolt hole 84 matched with a first bolt head 83 of the first bolt 82 is formed in the shaft disc 80, a check washer 85 used for preventing the first bolt 82 from loosening is arranged in the bolt hole 84, the check washer 85 is sleeved on the first bolt 82, and the check washer 85 is tightly pressed in the bolt hole 84 through the first bolt head 83. The shaft disc 80 is connected with the low-pressure journal 77 through the first bolt 82, and the looseness of the shaft disc 80 and the low-pressure journal 77 when the shaft disc 80 rotates is prevented through the anti-loose washer 85, so that the mounting stability of the shaft disc 80 and the crankshaft main body 74 is improved. The shaft disc 80 is a disc part with a driven claw of the coupler, the disc part simultaneously has the function of a flywheel and stores inertia potential energy, so that the air compressor is more stable in operation, the shaft disc 80 is provided with a counterweight hole 103 for counterweight, and the combined crankshaft is adjusted to the optimal balance state by increasing and decreasing materials in the counterweight holes 103 at different positions.

The end of the high-pressure journal 78 is provided with a balance weight 92 sleeved on the high-pressure journal 78, a second threaded hole 93 is formed in the high-pressure journal 78, the balance weight 92 is screwed in the second threaded hole 93 through a second bolt 94 and connected with the high-pressure journal 78, the end of the high-pressure journal 78 is provided with a circular mounting seat 95 matched with the balance weight 92, the diameter of a cylinder of the circular mounting seat 95 is smaller than that of the cylinder of the high-pressure journal 78, the second bolt 94 is sleeved with a flat washer 96, the flat washer 96 is arranged between a second bolt head 99 of the second bolt 94 and the circular mounting seat 95, and the balance weight 92 is fixed between the end of the high-pressure journal 78 and. The balance weight 92 is arranged at the end part of the high-pressure shaft neck 78 to balance the gravity center of the technology, and the balance weight 92 is arranged at the end part of the high-pressure shaft neck 78 through the circular mounting seat 95, so that the connection structure is simplified, and the connection stability is ensured.

Example 5

As shown in fig. 1 to 24, on the basis of embodiment 4 and on the basis of embodiment 1, a shaft disc mounting seat 86 and a first deep groove ball bearing seat 87 are arranged on the outer wall of a low-pressure journal 77, the shaft disc mounting seat 86 is arranged on the left side of the first deep groove ball bearing seat 87, a first step surface 88 is arranged between the shaft disc mounting seat 86 and the first deep groove ball bearing seat 87, a mounting hole 89 is arranged at the right end of a shaft disc 80, the shaft disc mounting seat 86 is arranged in the mounting hole 89 and abuts against the shaft disc 80, and the right end of the shaft disc 80 abuts against the first step surface 88; a second deep groove ball bearing seat 90 is arranged on the high-pressure journal 78, and a second step surface 91 is arranged on the left side of the second deep groove ball bearing seat 90. The shaft disc mounting seat 86 of the low-pressure shaft neck 77 is arranged in the mounting hole 89 and the shaft disc 80, the first deep groove ball bearing seat 87 is used for mounting the first deep groove ball bearing 114, the first deep groove ball bearing 114 is fixed on the low-pressure shaft neck 77 through the first step surface 88, and the second step surface 91 is used for fixing the position of the second deep groove ball bearing 119, so that the stability of parts is improved, the internal structure is more compact, and the mounting space is reduced.

Example 6

Oil-free piston type air compressor for new energy vehicle, as shown in fig. 1 to 24, on the basis of embodiment 5, on the basis of embodiment 2, balancing piece 92 includes connecting portion 97 and fan-shaped balancing portion 98, the upper end of connecting portion 97 is connected with the middle part of fan-shaped balancing portion 98 lower extreme and is connected and with connecting portion 97 formula structure as an organic whole, connecting portion 97 is last to be seted up with through-hole 100 of circular mount pad 95 adaptation, upward sunken upper groove 101 has been seted up to the upper end of through-hole 100, downward sunken lower groove 102 has been seted up to the upper end of circular mount pad 95, upper groove 101 and lower groove 102 cooperation form the key slot hole. The fan-shaped balance part 98 is connected with the high-pressure shaft neck 78 through the connecting part 97, the center of gravity of the technology during operation is balanced through the fan-shaped balance part 98, the positions of the balance weight 92 and the high-pressure shaft neck 78 are fixed by the positioning keys arranged in the key groove 29, the balance weight 92 and the high-pressure shaft neck 78 are prevented from rotating relatively, the stability of the balance weight 92 during operation is improved, and the shaft disc 80, the crankshaft main body 74 and the balance weight 92 jointly form a combined crankshaft which can effectively eliminate the rotating inertia moment after optimized design, so that the optimal balance effect is achieved.

The right side of reel 80 is equipped with second roller bearing seat 104, the cylinder diameter of second roller bearing seat 104 is less than the cylinder diameter of reel 80, the cover is equipped with left roller bearing 105 on the second roller bearing seat 104, be equipped with the mounting groove 106 with left roller bearing 105 adaptation in the crankcase 1, left roller bearing 105's right side is equipped with the first supporting sleeve 107 that offsets with left roller bearing 105 right side, first supporting sleeve 107 offsets with left roller bearing 105's right side, the cover is equipped with the first gland 108 that offsets with left roller bearing 105 left side on the reel 80. The left roller bearing 105 is fixed by the first support sleeve 107 and the first gland 108, and the axial movement of the left roller bearing 105 is prevented and the loss of bearing grease is prevented.

The inner wall of the first gland 108 is provided with a first sealing groove 109, a first sealing ring 110 matched with the first sealing groove 109 is arranged in the first sealing groove 109, and the first sealing ring 110 is sleeved on the shaft disc 80; a second sealing groove 111 is formed in the outer wall of the first supporting sleeve 107, a second sealing ring 112 matched with the second sealing groove 111 is arranged in the second sealing groove 111, and the second sealing ring 112 is arranged between the first supporting sleeve 107 and the crankcase 1. The two sides of the left roller bearing 105 are sealed by the first sealing ring 110 and the second sealing ring 112, so that contaminants are prevented from entering the left roller bearing 105 to contaminate the grease, and the grease in the left roller bearing 105 is further prevented from running off.

A low-pressure piston 45 and a high-pressure piston 73 are arranged in the cylinder body 2, a low-pressure connecting rod 113 connected with the low-pressure piston 45 is sleeved on a low-pressure journal 77, a first deep groove ball bearing 114 sleeved on the low-pressure journal 77 is arranged in the low-pressure connecting rod 113, the first deep groove ball bearing 114 is arranged on a first deep groove ball bearing seat 87, a first cover plate 115 sleeved on the low-pressure journal 77 is arranged on the left side of the low-pressure journal 77, the right side of the first cover plate 115 abuts against the low-pressure connecting rod 113, the left side of the first cover plate 115 abuts against the right end of the shaft disc 80, the first cover plate 115 is fixedly connected with the low-pressure connecting rod 113 through a first screw 116, and first adjusting collars 117 sleeved on the low-; the high-pressure journal 78 is sleeved with a high-pressure connecting rod 118 connected with the high-pressure piston 73, a second deep groove ball bearing 119 sleeved on the high-pressure connecting rod 118 is arranged in the high-pressure connecting rod 118, the second deep groove ball bearing 119 is arranged on the second deep groove ball bearing seat 90, the left side of the second deep groove ball bearing 119 abuts against the second step surface 91, a second cover plate 120 sleeved on the high-pressure journal 78 is arranged on the right side of the high-pressure connecting rod 118, the second cover plate 120 abuts against the right side of the high-pressure connecting rod 118, the second cover plate 120 is fixedly connected with the high-pressure connecting rod 118 through a second screw 121, and second adjusting collars 122 sleeved on the high-pressure journal 78 are arranged on two sides of the second. The first deep groove ball bearing 114 is pressed in the low-pressure connecting rod 113 through a first cover plate 115, the second deep groove ball bearing 119 is pressed in the high-pressure connecting rod 118 through a second cover plate 120, the low-pressure connecting rod 113 and the high-pressure connecting rod 118 are both of an integral structure, the bearing holes of the low-pressure connecting rod 113 and the high-pressure connecting rod 118 are both of a step type, the first deep groove ball bearing 114 and the second deep groove ball bearing 119 can be effectively prevented from loosening, the roundness of the first deep groove ball bearing 114 and the second deep groove ball bearing 119 is guaranteed to the maximum extent, the radial deformation of the first deep groove ball bearing 114 and the second deep groove ball bearing is prevented, the first adjusting ring sleeve 117 and the second adjusting ring sleeve 122 are respectively used for adjusting the axial positions of the first deep groove ball bearing 114 and the second deep groove ball bearing 119, the low-pressure connecting rod 113 and the high-pressure connecting rod 118 are enabled to move up and down on the central axis of the piston hole of the cylinder body all the time, the first cover plate 115, prevent that bearing grease from revealing and outside dust from getting into, low pressure connecting rod 113 and high pressure connecting rod 118 are monolithic structure, have inhomogeneous force when avoiding traditional sectioning connecting rod to press from both sides tightly and cause the defect that the bearing warp.

The right roller bearing 123 is sleeved on the first roller bearing seat 79, a second support sleeve 124 sleeved on the first roller bearing seat 79 is arranged on the left side of the right roller bearing 123, a third seal groove 125 is formed in the outer wall of the second support sleeve 124, a third seal ring 126 matched with the third seal groove 125 is arranged in the third seal groove 125, the third seal ring 126 is arranged between the second support sleeve 124 and the crankcase 1, a second gland 127 is arranged on the right side of the right roller bearing 123, a fourth seal groove 128 is formed in the inner wall of the second gland 127, a fourth seal ring 129 matched with the fourth seal groove 128 is arranged in the fourth seal groove 128, and the fourth seal ring 129 is arranged between the second gland 127 and the crankshaft disk 75. The right roller bearing 123 is axially fixed by the second support sleeve 124 and the second gland 127 to prevent the right roller bearing 123 from axially moving, and the third sealing ring 126 and the fourth sealing ring 129 seal two sides of the right roller bearing 123 to prevent contaminants from entering the right roller bearing 123 and further prevent the grease in the right roller bearing 123 from being lost.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. Oil-free piston air compressor machine for new energy automobile, including crankcase (1), cylinder body (2), cylinder head subassembly (3), be equipped with piston cylinder (4) in cylinder body (2), cylinder body (2) are established in the top of crankcase (1) and are connected with crankcase (1), and cylinder head subassembly (3) are established in the top of cylinder body (2) and are connected its characterized in that with cylinder body (2): the front side of the cylinder body (2) is provided with a low-pressure heat exchanger (5) connected with the crankcase (1), the right end of the cylinder body (2) is provided with a manifold block (6) connected with the cylinder body (2), the manifold block (6) is connected with the low-pressure heat exchanger (5) through a first water inlet pipe (7), the left end of the low-pressure heat exchanger (5) is provided with a first water outlet (8), and the first water outlet (8) is connected with the cylinder head assembly (3) through a first water drain pipe (9); the rear side of the cylinder body (2) is provided with a high-pressure heat exchanger (10) connected with the crankcase (1), the manifold block (6) and the high-pressure heat exchanger (10) are connected through a second water inlet pipe (11), the left end of the high-pressure heat exchanger (10) is provided with a second water outlet (12), the second water outlet (12) is connected with the cylinder head component (3) through a second water outlet pipe (13), a low-pressure piston (45) moving up and down in the piston cylinder (4) is arranged in the piston cylinder (4), the top of the low-pressure piston (45) is provided with a vent hole (46), an air inlet valve plate (47) covering the vent hole (46) is arranged above the vent hole (46), a pressing elastic sheet (48) pressed on the air inlet valve plate (47) is arranged above the air inlet valve plate (47), the pressing elastic sheet (48) is fixedly connected with the top of the low-pressure piston (45) through a stop bolt, a crankshaft, the crankshaft main body (74) comprises a crankshaft disk (75) and a journal (76) connected with the crankshaft disk (75), the journal (76) comprises a low-pressure journal (77) connected with a low-pressure piston (45) and a high-pressure journal (78) connected with a high-pressure piston (73), the low-pressure journal (77) and the high-pressure journal (78) are respectively arranged on two sides of the crankshaft disk (75), the low-pressure journal (77) and the high-pressure journal (78) are respectively eccentrically arranged on two sides of the crankshaft disk (75), the low-pressure journal (77) and the high-pressure journal (78) are arranged in parallel, a shaft disk (80) connected with the low-pressure journal (77) is arranged at the end of the low-pressure journal (77), and a balance block (92) sleeved on the high-pressure journal (78) is arranged at the.

2. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 1, wherein: the cylinder head assembly (3) comprises a cylinder cover (14) connected with the cylinder body (2) and a cylinder cover plate (15) arranged above the cylinder cover (14), the cylinder cover plate (15) is connected with the cylinder cover (14) through screws (16), the cylinder cover (14) is provided with a first water inlet (17) connected with a first water discharge pipe (9) and a second water inlet (18) connected with a second water discharge pipe (13), an inner cavity (19) which is sunken from top to bottom is formed in the cylinder cover (14), the inner cavity (19) and the cylinder cover plate (15) form a cooling water cavity (20), the first water inlet (17) and the second water inlet (18) are respectively communicated with the cooling water cavity (20), a first water discharge port (21) communicated with the first water inlet (17) is arranged on the front side of the cylinder cover (14), and a second water discharge port (22) communicated with the second water inlet (18) is arranged on the rear side of the cylinder cover (14).

3. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 1, wherein: the right-hand member of cylinder body (2) is equipped with communicating cylinder body water inlet (31) with manifold block (6), cylinder body (2) are including cylinder body outer wall (32) and cylinder body inner wall (33) that set gradually from outer to interior, cylinder body (2) surround by cylinder body outer wall (32) and form, piston cylinder (4) surround by cylinder body inner wall (33) and form, be equipped with water course outer wall (34) between cylinder body outer wall (32) and cylinder body inner wall (33), form cooling water course (35) between cylinder body inner wall (33) and water course outer wall (34), cooling water course (35) set up the outside at piston cylinder (4) along cylinder body inner wall (33) annular, be equipped with water course strengthening rib (36) in cooling water course (35), the both sides of water course strengthening rib (36) are connected with cylinder body inner wall (33) and water course outer wall (34.

4. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 3, wherein: the water channel reinforcing ribs (36) comprise first water channel reinforcing ribs (64) and second water channel reinforcing ribs (65), the upper end portions of the first water channel reinforcing ribs (64) are flush with the upper end of the cylinder body inner wall (33) and the upper end of the water channel outer wall (34), the upper end portions of the second water channel reinforcing ribs (65) are lower than the upper end portions of the first water channel reinforcing ribs (64), top horizontal flow channels (37) are arranged between the upper end of the water channel outer wall (34) and the upper end of the cylinder body inner wall (33), and the top horizontal flow channels (37) are arranged above the second water channel reinforcing ribs (65).

5. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 4, wherein: the lower tip of water course strengthening rib (36) all flushes, and the lower tip of water course strengthening rib (36) is higher than the upper end of water course outer wall (34), is equipped with bottom horizontal runner (38) between the lower extreme of water course outer wall (34) and cylinder body inner wall (33), and bottom horizontal runner (38) are established in the below of water course strengthening rib (36), and first water course strengthening rib (64) equipartition is established in the piston cylinder (4) outside, and second water course strengthening rib (65) are established between first water course strengthening rib (64).

6. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 3, wherein: be connected through strengthening rib (39) between water course outer wall (34) and cylinder body outer wall (32), strengthening rib (39), water course outer wall (34), cylinder body outer wall (32) surround and form sound insulation chamber (40), be equipped with mount (41) of being connected with cylinder body (2) in sound insulation chamber (40), the lower tip of mount (41) flushes with the lower tip in sound insulation chamber (40), the upper end of mount (41) is established in sound insulation chamber (40), mount (41) include cylinder (42) and with cylinder (42) peripheral connecting rib (43) of being connected, cylinder (42) are connected with cylinder body (2) through connecting rib (43), installation through-hole (44) have been seted up at the middle part of cylinder (42).

7. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 1, wherein: the air filter comprises a crankcase (1), a strip-shaped air inlet (23) arranged from front to back is arranged at the upper end of the crankcase (1), an air inlet joint (24) connected with the crankcase (1) is arranged above the strip-shaped air inlet (23), two parallel air inlet channels (25) are arranged on two sides of the upper end of the crankcase (1), the air inlet channels (25) are transversely arranged from left to right, the left end part of each air inlet channel (25) is communicated with the strip-shaped air inlet (23), an air filter assembly (26) connected with the crankcase (1) is arranged on the right side of the crankcase (1), the air filter assembly (26) comprises an air filter shell (27) and an air filter element (28) arranged in an inner cavity of the air filter shell (27), air filter air inlets (29) communicated with the right end of the air inlet channels (25) are arranged on two sides of the upper end of the air filter shell (27), the air filter air inlets (29) are communicated with the, the air filter air port (30) communicates with the interior of the crankcase (1).

8. The oil-free piston type air compressor for the new energy vehicle as claimed in claim 2, wherein: a valve plate (49) is arranged between the cylinder cover (14) and the cylinder body (2), a low-pressure valve plate (50) and a high-pressure valve plate (51) are arranged on the valve plate (49), the low-pressure valve plate (50) and the high-pressure valve plate (51) are arranged above the piston cylinder (4) in a matched mode, four low-pressure exhaust holes (52) which are evenly distributed in a square mode are formed in the low-pressure valve plate (50), high-pressure exhaust holes (53) are formed in the high-pressure valve plate (51), a low-pressure exhaust valve plate (54) fixedly connected with the low-pressure valve plate (50) is arranged on the upper end face of the low-pressure valve plate (50), the low-pressure exhaust valve plate (54) covers the upper portion of the low-pressure exhaust holes (52), a high-pressure exhaust valve plate (55) fixedly connected with the high-pressure valve plate (51) is arranged on the upper end face of the high-pressure valve plate (51), the high-pressure exhaust valve plate (51 57) The high-pressure air inlet hole (57) and the first high-pressure air inlet cavity (56) are arranged on the right side of the high-pressure air outlet hole (53), a high-pressure air inlet valve plate (66) fixedly connected with the high-pressure valve plate (51) is arranged on the lower end face of the high-pressure valve plate (51), and the high-pressure air inlet valve plate (66) covers the lower portion of the high-pressure air inlet hole (57).

9. The oil-free piston type air compressor for the new energy vehicle of claim 8, characterized in that: a low-pressure exhaust cavity (58), a high-pressure exhaust cavity (59) and a second high-pressure air inlet cavity (60) which are concave from bottom to top are arranged on the cylinder cover (14), the low-pressure exhaust cavity (58) is arranged above the low-pressure exhaust valve plate (54), the high-pressure exhaust cavity (59) is arranged above the high-pressure exhaust valve plate (55), the second high-pressure air inlet cavity (60) is arranged above the first high-pressure air inlet cavity (56) and communicated with the first high-pressure air inlet cavity (56), a low-pressure exhaust channel (61) communicated with the low-pressure exhaust cavity (58) is arranged at the front end of the cylinder cover (14), the low-pressure exhaust channel (61) is connected with the upper end of the right side of the low-pressure heat exchanger (5) through a low-pressure cylinder exhaust pipe (68), a high-pressure air inlet channel (67) communicated with the second high-pressure air inlet cavity (60) is arranged at the right end of the cylinder cover (14), and, the rear end of the cylinder cover (14) is provided with a high-pressure exhaust channel (62) communicated with the high-pressure exhaust cavity (59), the high-pressure exhaust channel (62) is connected with the upper end of the right side of the high-pressure heat exchanger (10) through a high-pressure cylinder exhaust pipe (70), and the lower end of the right side of the high-pressure heat exchanger (10) is provided with an exhaust port (63).