An oil-free piston compressor

Abstract

The present invention relates to an oil-free piston compressor, comprising a double-shaft motor, a cylinder body, a shell, a cover, a valve plate, a valve sheet, screws, a cylinder head, a partition, a wind shield, a sealing ring, a compression component, a first oil seal, a fan adapter plate and a fan; the compression component comprises an eccentric disk, a ball bearing, a connecting rod, a piston pin, a piston ring, a second oil seal, a needle bearing and a piston; the present invention can continuously and quickly discharge heat from the inside while compressing air, without the need for a separate fan, is easy to use, and greatly improves the cooling effect.

Description

Technical Field

[0001] The invention relates to an oil-free piston compressor. Background Art

[0002] Piston air compressors generate heat during operation. If it is not discharged in time, it will affect normal operation. In order to ensure the cooling of the piston air compressor, a fan is usually installed separately on the outside of the piston air compressor for air cooling. This is more troublesome to use and cannot take the heat out of the piston air compressor. The cooling effect is not ideal and needs further improvement. Summary of the invention

[0003] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide an oil-free piston compressor that can continuously and quickly discharge heat from the inside while compressing air, without the need for a separate fan, easy to use, greatly improving the cooling effect, and isolating the cooling air from the compression component to avoid contamination of the air in the compression component.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: an oil-free piston compressor, including a double-shaft motor, a cylinder body, a shell, a cover, a valve plate, a valve sheet, a screw, a cylinder head, a partition, a wind shield, a sealing ring, a compression assembly, a first oil seal, a fan adapter plate and a fan, characterized in that a shell symmetrically distributed is fixed at both ends of the double-shaft motor, a cylinder body symmetrically distributed is arranged at the upper and lower ends of each of the shells, a valve plate is arranged at the outer end of each of the cylinder bodies, a cylinder head is arranged on the outer side of each of the valve plates, and two valve sheets are arranged above each of the valve plates; a compression assembly is arranged inside each of the shells; and a shell is formed on the upper and lower sides of the shell. The connecting cavities are symmetrically distributed with each other, and the lower ends of the two cylinder bodies are respectively inserted into the interior of the two connecting cavities, and a piston cavity and a heat dissipation cavity are formed inside the cylinder body, and the heat dissipation cavity is located on the outside of the piston cavity; four heat dissipation hole combinations distributed at equal angles along the circumferential direction are opened on the upper plane of the cylinder cover, and the heat dissipation cavity and the four heat dissipation hole combinations are interconnected; each of the heat dissipation hole combinations includes a first heat dissipation hole, a second heat dissipation hole, a third heat dissipation hole, a fourth heat dissipation hole and a fifth heat dissipation hole; the partition is fixed at the outer end opening of the shell, the wind shield is fixed at the inner end opening of the shell, the sealing ring is arranged between the cylinder cover and the valve plate, the cover shell is arranged between the outer ends of the heat dissipation cavities on the two cylinder bodies, and the first oil seal is embedded and fixed in the cover shell.

[0005] Preferably, the compression assembly includes an eccentric disk, a ball bearing, a connecting rod, a piston pin, a piston ring, a second oil seal, a needle bearing and a piston; the eccentric disk is sleeved and fixed on the rotating shaft of the double-output shaft motor, an eccentric shaft is formed outward on one side of the outer end of the eccentric disk, two connecting rods are sleeved on the eccentric shaft and are diagonally arranged, and a fan adapter plate is arranged on the outer end of the eccentric shaft; the piston is arranged at the other end of the connecting rod through a piston pin and is located inside the piston cavity and can move up and down along the inner wall of the piston cavity, and a piston ring is also embedded on the outer circumferential surface of the piston.

[0006] Preferably, a ball bearing is embedded and fixed at one end of the connecting rod, and the ball bearing is sleeved and connected to the eccentric shaft, so that the connecting rod can rotate around the eccentric shaft.

[0007] Preferably, a needle bearing and two second oil seals are embedded and fixed inside the other end of the connecting rod, and the two second oil seals are respectively arranged on the outside of the two ends of the needle bearing, and a piston pin is inserted and connected in the needle bearing, and the two ends of the piston pin respectively pass through the two second oil seals and are inserted and connected to the inner sides of the piston in a rotating connection.

[0008] Preferably, a first inclined cavity is opened on the upper plane of the valve plate, and a vertically distributed first air outlet hole is opened on the lower plane of the valve plate; a first air inlet hole is opened on the lower plane of the valve plate, and the upper end of the first air inlet hole is connected to the bottom surface of the first inclined cavity, and a first positioning hole is opened on the upper plane of the valve plate.

[0009] Preferably, a second air inlet hole is provided on the lower plane of the cylinder head, and the lower end of the second air inlet hole is interconnected with the upper part of the first inclined surface cavity; a second inclined surface cavity is also provided on the lower plane of the cylinder head, and the second inclined surface cavity and the first inclined surface cavity are arranged diagonally to each other, and a vertically distributed second air outlet hole is provided on the bottom surface of the second inclined surface cavity, and the lower part of the second inclined surface cavity is interconnected with the upper end of the first air outlet hole.

[0010] Preferably, a second positioning hole is opened on the lower plane of the cylinder cover, the first positioning hole is located on the inner side of the first air inlet hole, and the second positioning hole is located on the inner side of the first air outlet hole.

[0011] Preferably, the two valve plates are respectively located above the second inclined surface cavity and below the first inclined surface cavity, and a screw is fixed on the upper plane of one of the valve plates arranged under the first inclined surface cavity, and the screw is inserted into the second positioning hole; a screw is also fixed on the lower plane of one of the valve plates arranged on the second inclined surface cavity, and the screw is inserted into the first positioning hole.

[0012] Preferably, an air inlet and an air outlet are respectively opened on both sides of the upper end of the cylinder head, the lower inner wall of the air inlet is connected to the upper end of the second air inlet hole, the lower inner wall of the air outlet is connected to the upper end of the second air outlet hole, and the sealing ring is located on the outside of the first inclined surface cavity and the second inclined surface cavity.

[0013] Preferably, the outer end of the eccentric shaft is eccentrically fixed to the inner end of the fan adapter plate, and the outer end of the fan adapter plate is formed with a wheel axle outwardly, and the outer end of the wheel axle passes through the first oil seal outward and is inserted and fixed in the center of the fan; the wheel axle is concentrically arranged with the rotating shaft of the dual-output shaft motor.

[0014] Compared with the prior art, the advantages of the present invention are: the present invention can continuously and quickly discharge heat from the inside while compressing the air, without the need for a separate fan, is easy to use, greatly improves the cooling effect, and isolates the cooling air from the compression component to prevent the air in the compression component from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural diagram of the present invention;

[0016] Figure 2 It is a top view of the cylinder head of the present invention. DETAILED DESCRIPTION

[0017] like Figures 1-2As shown, an oil-free piston compressor includes a double-shaft motor 23, a cylinder body 9, a shell 1, a cover 5, a valve plate 10, a valve sheet 12, a screw 7, a cylinder head 13, a partition 6, a wind deflector 22, a sealing ring 16, a compression assembly, a first oil seal 3, a fan adapter plate 4 and a fan 2; both ends of the double-shaft motor 23 are fixed with a shell 1 that is symmetrically distributed, and the upper and lower ends of each shell 1 are provided with a cylinder body 9 that is symmetrically distributed, the outer end of each cylinder body 9 is provided with a valve plate 10, the outer side of each valve plate 10 is provided with a cylinder head 13, and the interior of each shell 1 is provided with a compression assembly; the upper and lower sides of the interior of the shell 1 are formed with a connecting cavity 10 that is symmetrically distributed. 1, the lower ends of the two cylinder bodies 9 are respectively inserted into the interior of the two connecting chambers 101, and the interior of the cylinder body 9 is formed with a piston chamber 91 and a heat dissipation chamber 92, and the heat dissipation chamber 92 is located on the outside of the piston chamber 91; the compression assembly includes an eccentric disk 21, a ball bearing 20, a connecting rod 19, a piston pin 18, a piston ring 17, a second oil seal 15, a needle bearing 14 and a piston 8; the eccentric disk 21 is sleeved and fixed on the rotating shaft of the double-output shaft motor 23, and an eccentric shaft 211 is formed outwardly on one side of the outer end of the eccentric disk 21, and two connecting rods 19 arranged diagonally to each other are sleeved on the eccentric shaft 211, and a fan adapter plate 4 is arranged on the outer end of the eccentric shaft 211; a ball bearing 20 is embedded and fixed at one end of the connecting rod 19, and the ball bearing 20 is sleeved and connected to The piston 8 is arranged on the eccentric shaft 211 so that the connecting rod 19 can rotate around the eccentric shaft 211. The piston 8 is arranged at the other end of the connecting rod 19 through the piston pin 18 and is located inside the piston cavity 91 and can move up and down along the inner wall of the piston cavity 91; a needle bearing 14 and two second oil seals 15 are embedded and fixed inside the other end of the connecting rod 19. The two second oil seals 15 are respectively arranged on the outer sides of the two ends of the needle bearing 14. The piston pin 18 is inserted and connected in the needle bearing 14. The two ends of the piston pin 18 pass through the two second oil seals 15 and are inserted and connected to the inner sides of the piston 8 in a rotating connection. A piston ring 17 is also embedded on the outer circumferential surface of the piston 8; a first inclined cavity 1001 is opened on the upper plane of the valve plate 10. A first air outlet 1003 distributed vertically is provided on the lower plane of the valve plate 10; a first air inlet 1002 is provided on the lower plane of the valve plate 10, and the upper end of the first air inlet 1002 is communicated with the bottom surface of the first inclined surface cavity 1001; a second air inlet 132 is provided on the lower plane of the cylinder head 13, and the lower end of the second air inlet 132 is communicated with the upper end of the first inclined surface cavity 1001; a second inclined surface cavity 131 is also provided on the lower plane of the cylinder head 13, and the second inclined surface cavity 131 is arranged diagonally to the first inclined surface cavity 1001, and a second air outlet 135 distributed vertically is provided on the bottom surface of the second inclined surface cavity 131, and the lower part of the second inclined surface cavity 131 is communicated with the upper end of the first air outlet 1003;A first positioning hole 1004 is formed on the upper plane of the valve plate 10, and a second positioning hole 136 is formed on the lower plane of the cylinder cover 13. The first positioning hole 1004 is located on the inner side of the first air inlet hole 1002, and the second positioning hole 136 is located on the inner side of the first air outlet hole 1003. Two valve plates 12 are provided above each valve plate 10, and the two valve plates 12 are respectively located above the second inclined surface cavity 131 and below the first inclined surface cavity 1001. A valve plate 12 provided below the first inclined surface cavity 1001 A screw 7 is fixed on the upper plane of the cylinder head 12, and the head of the screw 7 is inserted into the second positioning hole 136; a screw 7 is also fixed on the lower plane of a valve plate 12 arranged on the second inclined cavity 131, and the head of the screw 7 is inserted into the first positioning hole 1004; four heat dissipation hole combinations distributed at equal angles along the circumferential direction are opened on the upper plane of the cylinder head 13, and each heat dissipation hole combination includes a first heat dissipation hole 137, a second heat dissipation hole 138, a third heat dissipation hole 139, a fourth heat dissipation hole 1310 and a fifth heat dissipation hole 1311; the heat dissipation cavity 92 and the four heat dissipation hole combinations are interconnected; the partition plate 6 is fixed at the outer end opening of the shell 1, the wind shield plate 22 is fixed at the inner end opening of the shell 1, the sealing ring 16 is arranged between the cylinder head 13 and the valve plate 10 and is located on the outside of the first inclined cavity 1001 and the second inclined cavity 131; the cover shell 5 is arranged between the outer ends of the heat dissipation cavity 92 on the two cylinder bodies 9, and the first oil seal 3 is embedded and fixed in the cover shell 5, and the outer end of the eccentric shaft 211 is eccentrically fixed at The inner end of the fan adapter plate 4 and the outer end of the fan adapter plate 4 are formed with a wheel shaft 41 outwardly, and the outer end of the wheel shaft 41 passes through the first oil seal 3 outwardly and is inserted and fixed in the center of the fan 2; the wheel shaft 41 is concentrically arranged with the rotating shaft of the double-output shaft motor 23; the upper end of the cylinder head 13 is provided with an inlet duct 133 and an outlet duct 134 on both sides, the lower inner wall of the inlet duct 133 is connected to the upper end of the second inlet hole 132, and the lower inner wall of the outlet duct 134 is connected to the upper end of the second outlet hole 135. ;

[0018] When in use, the rotating shaft of the double-output shaft motor 23 rotates after being energized, thereby driving the eccentric disk 21 to rotate, thereby driving the eccentric shaft 211 to rotate eccentrically, and then driving the two connecting rods 19 to reciprocate, thereby driving the two pistons 8 to reciprocate. When the piston 8 moves downward, the external air enters the second air inlet 132 through the air inlet duct 133 and presses down one of the valve plates 12, so that the air enters the first air inlet 1002 through the first inclined cavity 1001, and then enters the piston cavity 91; when the piston 8 moves upward, the compressed air enters the first air outlet 1003 and pushes up the other valve plate 12, so that the air enters the second air outlet 135 through the second inclined cavity 131, and is discharged to the outside through the air outlet duct 134; the first oil seal 3 and the second oil seal 15 can prevent the oil substances in the bearing from mixing in the compressed air, ensuring that the exhaust gas is oil-free; in addition, the eccentric shaft 211 is eccentrically When rotating, it will drive the fan adapter plate 4 to rotate synchronously, and then drive the wheel shaft 41 to rotate, because the wheel shaft 41 is concentrically arranged with the rotating shaft of the dual-output shaft motor 23; therefore, the rotation of the wheel shaft 41 will drive the fan 2 to rotate with the rotating shaft of the dual-output shaft motor 23 as the axis, thereby allowing the external air to enter the heat dissipation cavity 92 through the cover shell 5, and the heat generated in the piston cavity 91 due to the movement of the piston 8 will be transferred to the heat dissipation cavity 92 through the wall of the piston cavity 91, and the external air entering the heat dissipation cavity 92 will carry the heat upward and be discharged to the outside through the combination of four heat dissipation holes, thereby achieving synchronous heat dissipation; the partition plate 6 isolates the cooling wind from the compressed air to ensure that the piston 8 and the connecting rod 19 work stably for a long time; the fan 2 ensures that the fan and the motor rotate coaxially through the fan adapter plate installed on the eccentric disk; the wind shield 22 can prevent the cooling air entering the heat dissipation cavity 92 from escaping to the outside from the rear end of the shell 1, so as to make full use of the cooling air.

[0019] The piston air compressor generates heat during operation. If it is not discharged in time, it will affect normal operation. In order to ensure the cooling of the piston air compressor, a fan is usually separately set on the outside of the piston air compressor for blowing cooling, which is more troublesome to use and cannot bring heat out from the inside of the piston air compressor. The cooling effect is not ideal. The present invention can continuously and quickly discharge heat from the inside while compressing the air, without the need for a separate fan. It is easy to use and greatly improves the cooling effect. The cooling air is isolated from the compression component to prevent the air in the compression component from being contaminated.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil-free piston compressor, comprising a double-shaft motor, a cylinder block, a housing, a cover, a valve plate, a valve sheet, screws, a cylinder head, a partition, a wind shield, a sealing ring, a compression assembly, a first oil seal, a fan adapter plate and a fan, characterized in that: Both ends of the dual-output shaft motor are fixed with a mutually symmetrically distributed shell, and the upper and lower ends of each shell are provided with a mutually symmetrically distributed cylinder body, and the outer end of each cylinder body is provided with a valve plate, and the outer side of each valve plate is provided with a cylinder cover, and the upper part of each valve plate is also provided with two valve plates; a compression assembly is provided inside each shell; a mutually symmetrically distributed connecting cavity is formed on the upper and lower sides of the interior of the shell, and the lower ends of the two cylinder bodies are respectively inserted into the interior of the two connecting cavities, and the interior of the cylinder body forms a piston cavity and A heat dissipation cavity, the heat dissipation cavity is located outside the piston cavity; the upper plane of the cylinder head is provided with four heat dissipation hole combinations distributed at equal angles along the circumferential direction, and the heat dissipation cavity and the four heat dissipation hole combinations are interconnected; each of the heat dissipation hole combinations includes a first heat dissipation hole, a second heat dissipation hole, a third heat dissipation hole, a fourth heat dissipation hole and a fifth heat dissipation hole; the partition is fixed at the outer end opening of the shell, the wind shield is fixed at the inner end opening of the shell, the sealing ring is arranged between the cylinder head and the valve plate, the cover shell is arranged between the outer ends of the heat dissipation cavities on the two cylinder bodies, and the first oil seal is embedded and fixed in the cover shell; The compression assembly includes an eccentric disk, a ball bearing, a connecting rod, a piston pin, a piston ring, a second oil seal, a needle bearing and a piston; the eccentric disk is sleeved and fixed on the rotating shaft of the double-output shaft motor, an eccentric shaft is formed outward on one side of the outer end of the eccentric disk, two connecting rods arranged diagonally to each other are sleeved on the eccentric shaft, and a fan adapter plate is arranged on the outer end of the eccentric shaft; a ball bearing is embedded and fixed at one end of the connecting rod, and the ball bearing is sleeved and connected to the eccentric shaft so that the connecting rod can rotate around the eccentric shaft; the piston is arranged at the other end of the connecting rod through the piston pin and is located inside the piston cavity and can move up and down along the inner wall of the piston cavity, and a piston ring is also embedded on the outer circumferential surface of the piston; A needle bearing and two second oil seals are embedded and fixed inside the other end of the connecting rod. The two second oil seals are respectively arranged on the outer sides of the two ends of the needle bearing. A piston pin is inserted and connected in the needle bearing. The two ends of the piston pin pass through the two second oil seals and are inserted and connected to the inner sides of the piston in a rotating connection manner. A first inclined cavity is formed on the upper plane of the valve plate, and a vertically distributed first air outlet is formed on the lower plane of the valve plate; a first air inlet is formed on the lower plane of the valve plate, and the upper end of the first air inlet is communicated with the bottom surface of the first inclined cavity, and a first positioning hole is formed on the upper plane of the valve plate; A second air inlet hole is provided on the lower plane of the cylinder head, and the lower end of the second air inlet hole is communicated with the upper end of the first inclined cavity; a second inclined cavity is also provided on the lower plane of the cylinder head, and the second inclined cavity and the first inclined cavity are arranged diagonally to each other, and a second air outlet hole distributed vertically is provided on the bottom surface of the second inclined cavity, and the lower part of the second inclined cavity is communicated with the upper end of the first air outlet hole; The outer end of the eccentric shaft is eccentrically fixed to the inner end of the fan adapter plate, and the outer end of the fan adapter plate is formed with a wheel shaft outwardly, and the outer end of the wheel shaft passes through the first oil seal outwardly and is inserted and fixed in the center of the fan; the wheel shaft is concentrically arranged with the rotating shaft of the double-output shaft motor.

2. An oil-free piston compressor according to claim 1, characterized in that: A second positioning hole is formed on the lower plane of the cylinder cover. The first positioning hole is located on the inner side of the first air inlet hole, and the second positioning hole is located on the inner side of the first air outlet hole.

3. An oil-free piston compressor according to claim 2, characterized in that: The two valve plates are respectively located above the second inclined surface cavity and below the first inclined surface cavity, and a screw is fixed on the upper plane of the valve plate located below the first inclined surface cavity, and the head of the screw is inserted into the second positioning hole; A screw is also fixed on the lower plane of the valve plate arranged above the second inclined cavity, and the head of the screw is inserted into the first positioning hole.

4. The oil-free piston compressor according to claim 1, characterized in that: An air inlet and an air outlet are respectively provided on both sides of the upper end of the cylinder cover, the lower inner wall of the air inlet is connected to the upper end of the second air inlet hole, the lower inner wall of the air outlet is connected to the upper end of the second air outlet hole, and the sealing ring is located on the outside of the first inclined cavity and the second inclined cavity.

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