CN107228061B

CN107228061B - Air compressor of body cooling integration

Info

Publication number: CN107228061B
Application number: CN201710559732.8A
Authority: CN
Inventors: 李�浩; 戴国俊; 尚巧兰; 陶娟; 章丽红; 李林静
Original assignee: Jiangsu Hengda Power Technology Development Co ltd
Current assignee: Jiangsu Hengda Power Technology Development Co ltd
Priority date: 2017-07-11
Filing date: 2017-07-11
Publication date: 2020-04-21
Anticipated expiration: 2037-07-11
Also published as: CN107228061A

Abstract

The invention discloses an air compressor integrating machine body cooling. The pipeline of compressed air is arranged in the cylinder, the cylinder cover and the crankcase of the air compressor, wherein the cold water cavity is arranged in the cylinder and the cylinder cover, and the cold water cavity and the pipeline of the compressed air are integrally designed, so that the compressed air is cooled by the water cooling of the cylinder and the cylinder cover body, the whole mechanism is very compact in design, the disordered pipeline connection outside the box body is avoided, the installation and the maintenance are convenient, and the whole volume of the compressor is greatly reduced.

Description

Air compressor of body cooling integration

Technical Field

The invention relates to an air compressor, in particular to a piston type air compressor.

Background

The piston type air compressor drives a piston to reciprocate in an air cylinder through a crankshaft connecting rod to realize air compression. In a general piston type air compressor, when a piston is close to the axle center of a crankshaft, an air cylinder sucks air from the outside; when the piston is far away from the axle center of the crankshaft, the air in the cylinder is compressed. An important problem with such air compressors is that the piston is stressed a lot when the cylinder is inhaling and when the air is compressing, resulting in large vibrations. And such air compressors typically require staged compression due to their nature. The staged compression can reduce the exhaust temperature, save the compression work, improve the volume efficiency and increase the exhaust volume of the compressed gas. In addition, in the air compressor for the ship, the space of the ship is limited, so the volume requirement of the air compressor can be more compact.

Disclosure of Invention

The problems to be solved by the invention are as follows:

1. when the air cylinder inhales air and the air is compressed, the stress of the piston is greatly different, and the vibration is large.

2. The volume of the air compressor is more compact.

In order to solve the problems, the invention adopts the following scheme:

a body cooling integrated air compressor comprises a cylinder, a piston, a crankcase and a cylinder cover; the cylinder is arranged above the crankcase and is internally provided with a piston cavity; the cylinder cover is arranged on the cylinder and used for sealing the piston cavity; the piston is arranged in the piston cavity; the piston is connected with a crankshaft arranged on the crankcase through a connecting rod; the cooling water cooling device is characterized in that a first cooling water cavity and a plurality of cooling pipes are arranged between the outer wall of the cylinder and the wall of a piston cavity in the cylinder; the first cold water cavity is arranged in a ring piston cavity; the radiating pipe is vertically arranged and penetrates through the first cold water cavity; the top ends of the radiating pipes are communicated with the piston cavity through a top cover air passage in the cylinder cover.

Further, a second cold water cavity is arranged between the outer wall of the top cover air passage and the outer wall of the cylinder cover.

Further, a first combined air valve is arranged between the top of the piston cavity and the cylinder cover; the center of the cylinder cover is provided with a vertical air inlet passage which is communicated up and down; the air inlet channel is a cylindrical air channel, and the edge of the bottom of the air inlet channel is provided with an annular first sealing mechanism which is sealed with the first combined air valve, so that the air inlet of the first combined air valve is connected with the air inlet channel; the first air outlet is annular along the outer edge of the first sealing mechanism; the first air outlet is communicated with the top cover air passage, so that the air outlet of the first combined air valve is communicated with the top cover air passage through the first air outlet; the outer edge of the first air outlet is a sealing panel which is sealed with the top opening of the piston cavity; the sealing panel is annular, and the inner diameter of the sealing panel is matched with the diameter of the opening at the top of the piston cavity; the outer side of the sealing panel is provided with an arc-shaped connecting air port; the connecting air port is communicated with the top cover air passage; the top ends of the radiating pipes are opposite to the connecting air ports, so that the radiating pipes are communicated with the top cover air passage through the connecting air ports and further communicated with the air outlet of the first combined air valve; a partition plate is arranged above the top cover air passage; a second cold water cavity is arranged above the clapboard.

Further, the top surface of the cylinder is provided with a first water outlet communicated with the first cold water cavity; a second water inlet communicated with the second cold water cavity is formed in the bottom surface of the cylinder cover; the second water inlet is opposite to the first water outlet so that the second cold water cavity is communicated with the first cold water cavity; and a second water outlet communicated with the second cold water cavity is formed in the side surface of the cylinder cover.

Furthermore, the structure that intake duct, top cap air flue, second cold water chamber, first mechanism, first gas outlet, connection gas port, baffle, sealed panel, second delivery port and second water inlet on the cylinder head constitute is formed by whole casting.

Further, a cylinder ring channel is arranged on the bottom surface of the cylinder, which is used for sealing the crankcase; the cylinder ring is arranged around the opening at the bottom of the piston cavity; the bottom end opening of the radiating pipe is arranged in the cylinder ring channel and is communicated with the radiating pipe and the cylinder ring channel; the crankcase is provided with an axle box ring channel on the top surface for sealing with the cylinder; the top of the axle box loop is provided with an annular opening matched with the cylinder loop, so that the axle box loop is communicated with the cylinder loop; a water collecting tank is arranged on the side edge of the crankcase; a water collecting channel which is inclined downwards is arranged on the side of the crankcase, which is provided with the water collecting tank; the top of the water collecting channel is communicated with the axle box loop channel, and the bottom of the water collecting channel is communicated with the water collecting tank; a transition air passage is arranged laterally on the cylinder; the transition air passage is obliquely arranged on the cylinder, and the bottom of the transition air passage is communicated with the cylinder loop.

Further, an inner cone part with a larger upper opening and a smaller lower opening is arranged on the inner wall of the piston cavity, so that the piston cavity is divided into a compression cavity and a guide cavity; wherein the compression chamber is located above the guide chamber and has a diameter greater than that of the guide chamber; the outer side of the plug wall of the piston is provided with an outer cone part with the same slope as that of the inner cone part, so that the piston is divided into an upper plug part and a lower plug part; wherein the upper plug portion is located above the lower plug portion and has a diameter greater than that of the lower plug portion; the diameter of the upper plug part is matched with that of the compression cavity, so that the upper plug part and the cavity wall of the compression cavity can be sealed; the diameter of the lower plug part is matched with that of the guide cavity, so that the lower plug part and the cavity wall of the guide cavity can be sealed; go up stopper portion and be located the compression chamber, the lower extreme of lower stopper portion is located the direction intracavity for the compression chamber is cut apart into two compression chambers: a first compression chamber and a second compression chamber; the first compression cavity is surrounded by the top surface of the upper plug part, the cavity wall of the compression cavity and the cylinder cover at the top, and air inlet and air outlet are realized through a first combined air valve arranged between the top of the compression cavity and the cylinder cover; the second compression cavity is surrounded by the cavity wall of the compression cavity, the cylindrical surface of the lower plug part, the external cone part and the internal cone part, and air inlet and air outlet are realized through a second combined air valve arranged at a lateral air port arranged at the internal cone part of the piston cavity; the first compression chamber and the second compression chamber are cascaded.

Further, an inner cone part with a larger upper opening and a smaller lower opening is arranged on the inner wall of the piston cavity, so that the piston cavity is divided into a compression cavity and a guide cavity; wherein the compression chamber is located above the guide chamber and has a diameter greater than that of the guide chamber; the outer side of the plug wall of the piston is provided with an outer cone part with the same slope as that of the inner cone part, so that the piston is divided into an upper plug part and a lower plug part; wherein the upper plug portion is located above the lower plug portion and has a diameter greater than that of the lower plug portion; the diameter of the upper plug part is matched with that of the compression cavity, so that the upper plug part and the cavity wall of the compression cavity can be sealed; the diameter of the lower plug part is matched with that of the guide cavity, so that the lower plug part and the cavity wall of the guide cavity can be sealed; go up stopper portion and be located the compression chamber, the lower extreme of lower stopper portion is located the direction intracavity for the compression chamber is cut apart into two compression chambers: a first compression chamber and a second compression chamber; the first compression cavity is surrounded by the top surface of the upper plug part, the cavity wall of the compression cavity and the cylinder cover at the top, and air inlet and air outlet are realized through a first combined air valve arranged between the top of the compression cavity and the cylinder cover; the second compression cavity is surrounded by the cavity wall of the compression cavity, the cylindrical surface of the lower plug part, the external cone part and the internal cone part, and air inlet and air outlet are realized through a second combined air valve arranged at a lateral air port arranged at the internal cone part of the piston cavity; the first compression cavity and the second compression cavity are in cascade connection; the transition air passage is arranged on the side of the cylinder provided with the second combined air valve; a side cover is arranged on the outer side of the cylinder; and a side cover channel communicated with the air inlet of the second combined air valve and the transition air passage is arranged in the side cover.

Further, an interface cavity is arranged on the outer side of the lateral air port of the air cylinder; a second air valve cavity for mounting a second combined air valve is arranged between the lateral air port and the interface cavity; a second air outlet is arranged on the side edge of the joint cavity; the side cover is arranged on the outer side of the connecting cavity; the side cover is provided with a sealing sleeve; the sealing sleeve is provided with a second air inlet channel communicated with the side cover channel; the sealing sleeve is provided with a second sealing mechanism facing the lateral air port; the side cover channel is communicated with the transition air channel through a side channel opening at the bottom.

Furthermore, an inclined air outlet channel is also arranged in the outer wall of the air cylinder; the air outlet channel is positioned outside the first cold water cavity; one end of the air outlet channel is connected with a second air outlet; the other end is connected with the air outlet.

The invention has the following technical effects:

1. according to the invention, through the arrangement of the single-cylinder single-piston two-stage compression cavity, when the piston is close to the axis of the crankshaft, the first-stage compression cavity sucks air, and the second-stage compression cavity compresses; when the piston is far away from the axis of the crankshaft, the first-stage compression cavity compresses air, and the second-stage compression cavity sucks air, so that the piston is stressed relatively uniformly in the reciprocating motion process, vibration is reduced, and compression work is saved.

2. The components cooled by compressed air are directly integrated into the cylinder and the cylinder cover, and the pipeline connected between the two stages of compression cavities is also integrated into the cylinder and the cylinder cover, so that the air compressor does not need to be provided with an additional cooling mechanism, and the whole volume is reduced.

3. The pipeline is integrated in the cylinder and the cylinder cover, so that the disordered connection of external pipelines is avoided, and the air compressor is convenient to install and maintain.

4. The design of large-space air passages among two-stage compression cavities such as a plurality of radiating pipes, an air cylinder ring passage, a transition air passage and the like enables the air compressor to have a built-in buffering function.

5. The piston cavity is designed to be surrounded by the cold water cavity, so that the piston cavity can be cooled by the cold water cavity.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a vertical section of the cylinder.

Fig. 3 is a schematic view of the cylinder taken horizontally along the center line of the lateral opening.

Fig. 4 is a schematic view of the piston structure.

Fig. 5, 6, 7, 8, 9, and 10 are schematic structural views of the cylinder head. Wherein figure 5 is a top plan view. Fig. 6 is a bottom view from below. Fig. 7 is a view taken vertically along the X-axis in fig. 5. Fig. 8 is a view taken vertically along the Y-axis in fig. 5. Fig. 9 is a view taken horizontally along line L1 in fig. 8. Fig. 10 is a view taken horizontally along line L2 in fig. 8.

Fig. 11 is a schematic view of a vertical section of the crankcase.

Fig. 12 is a schematic structural view of a vertical section of the side cover.

Detailed Description

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

As shown in fig. 1 to 12, an air compressor includes a cylinder 1, a piston 2, a crankcase 3, a cylinder head 4, and a side cover 6. The air compressor is a single-cylinder single-piston two-stage air compressor and is also an air compressor with integrated machine body cooling. Specifically, the piston 2 is installed in the piston cavity 11 of the cylinder 1, and divides the piston cavity 11 of the cylinder 1 into two stages of compression cavities, and the two stages of compression cavities are cascaded to form a two-stage air compressor. The compressed air pipelines cascaded between the two stages of compression chambers are connected through pipelines and air passages arranged in the cylinder cover 4, the cylinder 1 and the crankcase 3. All be provided with the cold water chamber in cylinder 1 and the cylinder cap 4, thereby realize the air compressor of organism cooling integration through the cooling water chamber to the cooling of compressed air in pipeline and the air flue.

As shown in fig. 1, 2, and 3, the cylinder 1 is mounted above the crankcase 3, and a piston chamber 11 is provided therein. The piston chamber 11 is arranged vertically. The top of the piston chamber 11 is provided with a first gas valve chamber 114 and the bottom is provided with a connecting rod opening 115. The cylinder head 4 is mounted on the cylinder 1 for sealing the piston chamber 11. A first combined air valve 51 is arranged in a first air valve cavity 114 where the cylinder 1 is connected with the cylinder head 4. The piston 2 is mounted in the piston chamber 11. The piston 2 is connected to a connecting rod 39. The connecting rod 39 passes through a connecting rod opening 115 at the bottom of the piston chamber 11 and is connected to a crankshaft 38 mounted on the crankcase 3. The crankshaft 38 thus rotated lifts and lowers the piston 2 via the connecting rod 39. An inner tapered portion 113 having a larger upper opening and a smaller lower opening is provided on the inner wall of the piston chamber 11, so that the piston chamber 11 is divided into a compression chamber 111 and a guide chamber 112. Compression chamber 111 and guide chamber 112 are each cylindrical in configuration and inner cone 113 is a conical in configuration, wherein compression chamber 111 is located above guide chamber 112 and has a diameter greater than the diameter of guide chamber 112. The side of internal taper 113 is provided with a lateral opening 116 that communicates piston chamber 11 with the outside.

As shown in fig. 4, the plunger wall outer side of the piston 2 is provided with an outer tapered portion 21 having the same slope as the inner tapered portion 113, so that the piston 2 is divided into an upper plug portion 22 and a lower plug portion 23. The upper plug portion 22 and the lower plug portion 23 are both cylindrical structures, and the external taper portion 21 is a tapered structure, in which the upper plug portion 22 is located above the lower plug portion 23, and has a diameter larger than that of the lower plug portion 23. The diameter of the upper plug portion 22 matches the diameter of the compression chamber 111, so that the upper plug portion 22 can seal with the chamber wall of the compression chamber 111. The diameter of the lower plug portion 23 matches the diameter of the guide cavity 112, so that the lower plug portion 23 can seal with the cavity wall of the guide cavity 112.

The upper plug portion 22 is located in the compression chamber 111, and the lower end of the lower plug portion 23 is located in the guide chamber 112, so that the compression chamber 111 is divided into two compression chambers: a first compression chamber and a second compression chamber. The first compression chamber is surrounded by the top surface of the upper plug portion 22, the chamber wall of the compression chamber 111, and the cylinder head 4 at the top, and the air intake and air exhaust are realized by the first combined air valve 51 installed between the top of the compression chamber 111 and the cylinder head 4. That is, the first compression chamber is actually an area surrounded by the top surface 24 of the piston 2, the chamber wall of the compression chamber 111, and the bottom of the first combined air valve 51. The second compression chamber is surrounded by the chamber wall of the compression chamber 111, the cylindrical surface of the lower plug portion 23 of the piston 2, the external tapered portion 21 of the piston 2, and the internal tapered portion 113 of the piston chamber 11. The second compression chamber is a parallelogram-shaped body of revolution which surrounds the lower plug 23 of the piston 2 in structural terms. The first compression chamber and the second compression chamber are divided by the seal between the upper plug part 22 of the piston 2 and the chamber wall of the compression chamber 111; the second compression chamber is divided from the rod opening 115 by a seal between the lower end of the lower plug 23 of the piston 2 and the guide chamber 112. The sealing between the upper plug part 22 and the cavity wall of the compression cavity 111 is realized by a first annular sealing mechanism 221 arranged on the upper plug part 22; sealing between the lower end of the lower plug portion 23 and the guide chamber 112 is achieved by a second annular sealing mechanism 231 mounted on the lower end of the lower plug portion 23. The first annular sealing mechanism 221 and the second annular sealing mechanism 231 are each composed of a seal ring and a scraper ring. The first compression chamber realizes air inlet and air outlet through a first combined air valve 51 arranged at the top of the first compression chamber. The second compression chamber is charged and discharged through the side ports 116 provided in the inner cone 113 of the piston chamber 11. Since the inner cone 113 of the piston chamber 11 is located at the bottom of the second compression chamber, the side ports 116 are provided at the bottom of the second compression chamber. A second combined air valve 52 is arranged outside the lateral air port 116. That is, the air inlet and outlet of the side air port 116 are controlled by the second combined air valve 52. The first combined air valve 51 and the second combined air valve 52 are composed of two integrated check valves, which are familiar to those skilled in the art and will not be described in detail herein.

A first cold water cavity 12 and a plurality of radiating pipes 13 are arranged between the outer wall of the cylinder 1 and the wall of the piston cavity 11 in the cylinder 1. A first cold water chamber 12 is provided around the piston chamber 11. Reference numerals 12_ a, 12_ b and 12_ c in fig. 2 are all part of the first cold water chamber 12 and are communicated with each other. The radiating pipe 13 is vertically installed between the outer wall of the cylinder 1 and the piston cavity 11 in the cylinder 1, the top end of the radiating pipe is installed on the top surface of the cylinder 1, the bottom end of the radiating pipe is installed on the bottom surface of the cylinder 1 and is communicated with the cylinder loop 14, and the middle of the radiating pipe passes through the first cold water cavity 12. The radiating pipe 13 is provided therein with a spiral sheet 131 for enhancing a radiating effect. The top side of the cylinder 1 is sealed to the cylinder head 4 and the bottom side is sealed to the crankcase 3. The cylinder ring 14 is provided on the bottom surface of the cylinder 1 and opens toward the crankcase 3. The cylinder 1 is laterally provided with a transition air passage 141. The transition air passage 141 is used for communicating the air inlet of the cylinder ring passage 14 with the air inlet of the second combined air valve 52. The transition air passage 141 is obliquely arranged on the cylinder 1, the bottom of the transition air passage is communicated with the cylinder loop 14, and the transition air passage is arranged on the side direction of the cylinder 1 provided with the second combined air valve 52. That is, the transition duct 141 is co-directional with the side port 116. The top of the transition duct 141 is provided with a lateral transition opening 142.

The cylinder ring tracks 14 match the pedestal ring tracks 32 on the crankcase 3. As shown in fig. 1 and 11, a pedestal ring 32 is provided on the top of the crankcase 3. In this embodiment, the crankcase 3 is a case with five openings. The five openings are respectively: two opposed shaft bore openings 33, a right side opening 311, a left side opening 312, and a top piston opening 331. Two shaft hole openings 33 are used for installing a bearing seat of the crankshaft 38, the right and left

side openings

311 and 312 are respectively used for installing and debugging and maintaining the internal structure of the crankcase 3, and the piston opening 331 at the top is used for communicating with the piston cavity 11 of the cylinder 1 so that the connecting rod 39 can be connected with the piston 2 and the crankshaft 38. Both right and left

openings

311, 312 are sealed by a cover plate, wherein the cover plate of the right opening 311 is the water collection tank 34. That is, the water collection tank 34 integrates a cover function to seal the right opening 311. The pedestal ring 32 surrounds the top piston opening 331. The pedestal ring 32 has an annular opening 322 at the top that matches the cylinder ring 14 to allow the pedestal ring 32 and cylinder ring 14 to communicate. The annular opening 322 is provided on the top surface of the crankcase 3. The top surface of the crankcase 3 is sealed with the bottom surface of the cylinder 1. The top side of the crankcase 3 is provided with a water collecting passage 321 inclined downward. The water collecting passage 321 communicates with the axle box passage 32 and the water collecting tank 34. That is, the water collection passage 321 is provided in the side of the crankcase 3 where the water collection tank 34 is provided.

The cylinder ring 14 at the bottom of the cylinder 1 and the pedestal ring 32 at the top of the crankcase 3 form an annular and sealed cavity. The annular and sealed cavity serves to buffer the compressed air and to collect condensed water generated in the compressed air after the cooling pipe 13 is cooled. The compressed air is cooled by the heat dissipating pipe 13 to generate condensed water, and the condensed water generated by the cooling of the compressed air naturally flows into the axle box loop 32 and then flows into the water collecting tank 34 through the water collecting channel 321. The compressed air flows from the heat pipe 13 into the annular and sealed cavity formed by the cylinder ring 14 at the bottom of the cylinder 1 and the axle box ring 32 at the top of the crankcase 3, and then flows to the inlet of the second combined air valve 52 through the transition air passage 141.

The top end of the heat radiation pipe 13 is communicated with the air outlet of the first combined air valve 51 through a top cover air passage 42 arranged in the cylinder cover 4. The cylinder head 4 is a square body having a top surface 49 and a bottom surface 48, as shown in fig. 1, 5, 6, 7, 8, 9, and 10. The center of the cylinder head 4 is provided with an intake passage 41 that is vertical and penetrates up and down. The air inlet 41 is a cylindrical air passage, and the bottom edge is provided with a first sealing mechanism 411 which is annular and is sealed with the first combined air valve 51. The first sealing mechanism 411 is abutted against the first combined air valve 51, divides an air inlet and an air outlet of the first combined air valve 51, and connects the air inlet of the first combined air valve 51 with the air inlet 41. Along the outer edge of the first sealing mechanism 411 is a ring-shaped first air outlet 421. The air outlet of the first combined air valve 51 is positioned in the first air outlet 421. The first air outlet 421 is communicated with the top cover air passage 42, so that the air outlet of the first combined air valve 51 is communicated with the top cover air passage 42 through the first air outlet 421. The outer edge of the first outlet 421 is a sealing panel 429 which seals the top opening of the piston chamber 11. The sealing panel 429 is annular with an inner diameter matching the diameter of the top opening of the piston chamber 11. The outside of the sealing panel 429 is provided with an arcuate connecting air port 422. The connecting air port 422 communicates with the cap air passage 42. The top end of the heat dissipation pipe 13 faces the connection air port 422, so that the heat dissipation pipe 13 is communicated with the top cover air passage 42 through the connection air port 422 and further communicated with the air outlet of the first combined air valve 51. Above the top cover air passage 42 is a partition 423. Above the partition 423 is a second cold water chamber 43. That is, a second cold water chamber 43 is provided between the outer wall of the head cover air passage 42 and the outer wall of the cylinder head 4, and the head cover air passage 42 and the second cold water chamber 43 are partitioned by a partition plate 423. The first seal mechanism 411, the first air outlet 421, the seal panel 429 and the connecting air port 422 are all located on the bottom surface 48 of the cylinder head 4.

The communication between the transition air passage 141 and the air inlet of the second combined air valve 52 is realized by the side cover 6. As shown in fig. 1, 2, and 3, the side port 116 of the cylinder 1 is provided with an interface cavity 16 on the outer side. A second air valve chamber 161 for installing the second combined air valve 52 is arranged between the lateral air port 116 and the interface chamber 16. The interface chamber 16 is opened at the front and provided with a second air outlet 162 at the side. An inclined air outlet channel 15 is arranged in the outer wall of the cylinder 1. The outlet channel 15 is located outside the first cold water chamber 12. One end of the air outlet channel 15 is connected with the second air outlet 162. And the other end is connected with the air outlet 151. The slant of the air outlet channel 15 means that the end of the air outlet channel 15 connected with the second air outlet 162 is slightly higher than the end connected with the air outlet 151, and the height difference between the two ends is not more than 2 cm. The side cover 6 is installed outside the cylinder 1, is positioned outside the second combined air valve 52 and the interface cavity 16, and seals the interface cavity 16. As shown in fig. 12, the side cover 6 includes a cover body, a side cover passage 61 provided in the cover body, a sealing sleeve 62 attached to the cover body, and a safety air valve 64 attached to the top end of the side cover passage 61. The sealing sleeve 62 is a tubular body and has a second air inlet 621 therein. The second intake duct 621 communicates with the side cover passage 61. The side duct opening 611 at the bottom of the side cover channel 61 is sealed off from the transition opening 142 at the top of the transition duct 141, so that the side cover channel 61 communicates with the transition duct 141. The edge of the sealing sleeve 62 facing the second combined air valve 52 is provided with a second sealing mechanism 622. The second sealing mechanism 622 is inserted into the interface cavity 16 and abuts against the second combined air valve 52 to divide the interface cavity 16 and isolate the air inlet and the air outlet of the second combined air valve 52, so that the air inlet of the second combined air valve 52 is located in the second air inlet channel 621, the air inlet of the second combined air valve 52 is communicated with the second air inlet channel 621, and the air outlet of the second combined air valve 52 is communicated with the second air outlet 162 through the interface cavity 16. The sealing cover 62 is a fitting attached to the lid body of the side cover 6. The sealing sleeve 62 is provided with an annular clamping protrusion 623 on the outer wall close to the second sealing mechanism 622. A butterfly elastic washer 63 is installed between the latch 623 and the cover body of the side cover 6. The second sealing mechanism 622 of the sealing sleeve 62 can be tightly pressed against the second combined air valve 52 when the side cover 6 is mounted outside the interface cavity 16 by the elasticity of the butterfly-shaped elastic washer 63.

The two-stage compression working principle of the air compressor of the embodiment is as follows: firstly, outside air enters an air inlet channel 41 in the cylinder cover 4 through a filter arranged above the top of the cylinder cover 4, then enters a first compression cavity through an air inlet of a first combined air valve 51, and is compressed by the motion of a piston 2 to complete first-stage compression; the compressed air of the first stage of compression enters the top cover air passage 42 through the air outlet of the first combined air valve 51 and the first air outlet 421 on the cylinder cover 4; the compressed air in the top cover air passage 42 enters the radiating pipe 13 through the connecting air port 422 for cooling and radiating; the condensed water generated after cooling and heat dissipation flows into the water collection tank 34 through the axle box loop 32 and the water collection channel 321; the cooled and radiated compressed air enters the side cover channel 61 in the side cover 6 through the transition air channel 141, and then enters a second compression cavity from the side air port 116 through the second air inlet channel 621 and the air inlet of the second combined air valve 52; the second stage of compression is completed after the piston 2 moves and compresses; the compressed air after the second stage of compression enters the connecting cavity 16 through the lateral air port 116 via the air outlet of the second combined air valve 52, then enters the air outlet channel 15 through the second air outlet 162 on the connecting cavity 16, and finally is exhausted from the air outlet 151, so that the two-stage compression is realized through the cascade connection between the first compression cavity and the second compression cavity. When the piston 2 moves upwards, the first compression cavity compresses air, and the second compression cavity sucks air; when the piston 2 moves downwards, the first compression chamber sucks air and the second compression chamber compresses air.

In this embodiment, the first cold water chamber 12 in the cylinder 1 is communicated with the second cold water chamber 43 in the cylinder cover 4, and the first cold water chamber 12 is communicated with the second cold water chamber 43 through the internal passages of the cylinder 1 and the cylinder cover 4. Specifically, the top surface of the cylinder 1 is provided with a first water outlet 121 communicated with the first cold water chamber 12. A second water inlet 432 communicated with the second cold water chamber 43 is provided on the bottom surface of the cylinder head 4. The second water inlet 432 is opposite to the first water outlet 121 so that the second cold water chamber 43 communicates with the first cold water chamber 12. In this embodiment, the number of the second water inlets 432 and the number of the first water outlets 121 are three, and the two water inlets and the two water outlets are distributed. A communicating flange is arranged between the second water inlet 432 and the first water outlet 121. A first water inlet communicated with the first cold water chamber 12 is formed below the side surface of the first cold water chamber 12, and a second water outlet 431 communicated with the second cold water chamber 43 is formed on the side surface of the cylinder cover 4. Therefore, cooling water enters the first cold water chamber 12 through a first water inlet arranged below the side surface of the first cold water chamber 12, the cooling water in the first cold water chamber 12 enters the second cold water chamber 43 in the cylinder head 4 through the first water outlet 121 and the second water inlet 432, and finally flows out of the second water outlet 431, so that the flow of the cooling water of the first cold water chamber 12 and the second cold water chamber 43 is completed.

In addition, an outer wall opening 122 is opened on the outer wall of the first cold water chamber 12 of the cylinder 1 on the side where the radiating pipe 13 is installed, and the outer wall opening 122 is used for maintaining the radiating pipe 13 in the first cold water chamber 12. In operation, the outer wall opening 122 is sealed by the cover plate.

In this embodiment, the structure formed by the air inlet 41, the top cover air passage 42, the second cold water cavity 43, the first sealing mechanism 411, the first air outlet 421, the connecting air port 422, the partition plate 423, the sealing panel 429, the connecting air port 422, the second water outlet 431 and the second water inlet 432 on the cylinder head 4 is formed by integral casting. The structure formed by the piston cavity 11, the first water inlet, the first cold water cavity 12, the first water outlet 121, the outer wall opening 122, the cylinder ring channel 14, the transition air channel 141, the lateral air port 116, the air outlet channel 15 and the interface cavity 16 on the cylinder 1 is formed by integral casting. The five-sided opening of the crankcase 3 and the mechanism consisting of the pedestal ring 32 and the water collecting passage 321 are integrally cast.

Since piston air compression is a pulsed air bleed, buffering to slow the pulse is required. In this embodiment, the top cover air passage 42, the cylinder ring passage 14 at the bottom of the cylinder 1, the axle box ring passage 32 at the top of the crankcase 3, the transition air passage 141, the water collecting passage 321, and the water collecting tank 34 all have large space capacity, and can play a role in buffering. In addition, the radiating pipe adopts a plurality of designs so as to play a role of buffering.

Claims

1. A machine body cooling integrated air compressor comprises a cylinder (1), a piston (2), a crankcase (3) and a cylinder cover (4); the cylinder (1) is arranged above the crankcase (3) and is internally provided with a piston cavity (11); the cylinder cover (4) is arranged on the cylinder (1) and used for sealing the piston cavity (11); the piston (2) is arranged in the piston cavity (11); the piston (2) is connected with a crankshaft (38) arranged on the crankcase (3) through a connecting rod (39); the cooling water device is characterized in that a first cooling water cavity (12) and a plurality of radiating pipes (13) are arranged between the outer wall of the cylinder (1) and the wall of a piston cavity (11) in the cylinder (1); the first cold water cavity (12) is arranged around the piston cavity (11); the radiating pipe (13) is vertically arranged and passes through the first cold water cavity (12); the top ends of the radiating pipes (13) are communicated with the piston cavity (11) through a top cover air passage (42) in the cylinder cover (4); a cylinder ring channel (14) is arranged on the bottom surface of the cylinder (1) which is used for being sealed with the crankcase (3); the cylinder ring channel (14) is arranged around the opening at the bottom of the piston cavity (11); the bottom end opening of the radiating pipe (13) is arranged in the cylinder ring channel (14) and is communicated with the radiating pipe (13) and the cylinder ring channel (14); an axle box ring channel (32) is arranged on the top surface of the crankcase (3) which is used for sealing with the cylinder (1); the top of the axle box ring road (32) is provided with an annular opening matched with the cylinder ring road (14) so that the axle box ring road (32) is communicated with the cylinder ring road (14); a water collecting tank (34) is arranged on the side edge of the crankcase (3); a water collecting channel (321) which is inclined downwards is arranged on the side of the crankcase (3) provided with the water collecting tank (34); the top of the water collecting channel (321) is communicated with the axle box ring channel (32), and the bottom is communicated with the water collecting tank (34); a transition air passage (141) is arranged on the side of the cylinder (1); the transition air passage (141) is obliquely arranged on the cylinder (1), and the bottom of the transition air passage is communicated with the cylinder ring passage (14).

2. A block-cooling integrated air compressor according to claim 1, wherein a second cold water chamber (43) is provided between the outer wall of the head cover air passage (42) and the outer wall of the cylinder head (4).

3. A body-cooling integrated air compressor according to claim 2, wherein a first combined air valve (51) is installed between the top of the piston chamber (11) and the cylinder head (4); an air inlet channel (41) which is vertical and is penetrated up and down is arranged at the center of the cylinder cover (4); the air inlet channel (41) is a cylindrical air channel, and the edge of the bottom of the air inlet channel is provided with an annular first sealing mechanism (411) which is sealed with the first combined air valve (51), so that the air inlet of the first combined air valve (51) is connected with the air inlet channel (41); a first air outlet (421) which is annular along the outer edge of the first sealing mechanism (411); the first air outlet (421) is communicated with the top cover air passage (42), so that the air outlet of the first combined air valve (51) is communicated with the top cover air passage (42) through the first air outlet (421); the outer edge of the first air outlet (421) is a sealing panel (429) which is sealed with the top opening of the piston cavity (11); the sealing panel (429) is annular, and the inner diameter of the sealing panel is matched with the diameter of the top opening of the piston cavity (11); the outer side of the sealing panel (429) is provided with an arc connecting air port (422); the connecting air port (422) is communicated with the top cover air passage (42); the top end of the radiating pipe (13) is opposite to the connecting air port (422), so that the radiating pipe (13) is communicated with the top cover air passage (42) through the connecting air port (422) and further communicated with the air outlet of the first combined air valve (51); a partition plate (423) is arranged above the top cover air passage (42); a second cold water chamber (43) is arranged above the partition plate (423).

4. A body-cooling integrated air compressor according to claim 3, wherein the top surface of the cylinder (1) is provided with a first water outlet (121) communicated with the first cold water chamber (12); a second water inlet (432) communicated with the second cold water cavity (43) is formed in the bottom surface of the cylinder cover (4); the second water inlet (432) is opposite to the first water outlet (121) so that the second cold water cavity (43) is communicated with the first cold water cavity (12); a second water outlet (431) communicated with the second cold water cavity (43) is arranged on the side surface of the cylinder cover (4).

5. A machine body cooling integrated air compressor as claimed in claim 4, characterized in that the structure consisting of the inlet duct (41), the head cover air passage (42), the second cold water chamber (43), the first sealing mechanism (411), the first air outlet (421), the connecting air port (422), the partition plate (423), the sealing panel (429), the second water outlet (431) and the second water inlet (432) on the cylinder head (4) is formed by integral casting.