CN215058016U

CN215058016U - End-cooled oil-free piston type air compressor

Info

Publication number: CN215058016U
Application number: CN202120926102.1U
Authority: CN
Inventors: 屠天贝; 祝培军; 傅春均
Original assignee: Zhejiang Vie Qifu Auto Parts Co ltd
Current assignee: Zhejiang Vie Qifu Auto Parts Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-12-07
Anticipated expiration: 2031-04-30

Abstract

The utility model relates to a compressor specifically discloses a tip refrigerated does not have oily piston air compressor machine. An oil-free piston type air compressor with a cooled end part comprises a motor and a machine body, wherein the machine body comprises a main shaft box and a cylinder body, a crankshaft is arranged in the main shaft box, and the motor is connected with one end of the crankshaft and drives the crankshaft to rotate; the cooling assembly comprises an impeller and an air guide cover, and the impeller is arranged at one end of the spindle box, which is far away from the motor; the impeller is connected with the crankshaft and synchronously rotates; the wind guide cover is arranged to cover the spindle box, and a wind guide channel is formed between the inner wall of the wind guide cover and the outer wall of the spindle box; the air guide cover is also provided with an air inlet corresponding to the impeller and an air outlet corresponding to the cylinder body, and the air inlet and the air outlet are respectively communicated with the air guide channel.

Description

End-cooled oil-free piston type air compressor

Technical Field

The utility model relates to a compressor, concretely relates to tip refrigerated does not have oily piston air compressor machine.

Background

An electric gas compressor is a main body of a gas source device, and is a device for converting mechanical energy of a prime mover (usually, an electric motor) into gas pressure energy, and is a gas pressure generating device for compressing gas. When the gas is compressed, the volume of the gas decreases, the pressure increases, and the temperature increases. The temperature rise during compression is an important factor limiting the mechanical efficiency of the compressor, which is therefore usually provided with a cooling system.

The conventional cooling system is air-cooled, that is, an external fan is used to drive ambient air to flow to the compressor and take away heat, so as to achieve the purpose of cooling. Common air-cooled compressor generally sets up the fan in the organism below in the existing market to drive air and follow up the motion and cool off the organism. This kind of mode not only needs to improve the organism and reserves sufficient installation space for the fan, still needs additionally to set up the power supply for the motor, has certain limitation in the use.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a tip refrigerated does not have oily piston air compressor machine, under the prerequisite of guaranteeing the cooling effect, overall structure is simplified to the rational arrangement cooling module, improves space utilization.

In order to solve the technical problem, the utility model provides a technical scheme as follows: an oil-free piston type air compressor with a cooled end part comprises a motor and a machine body, wherein the machine body comprises a main shaft box and a cylinder body, a crankshaft is arranged in the main shaft box, and the motor is connected with one end of the crankshaft and drives the crankshaft to rotate; the cooling assembly comprises an impeller and an air guide cover, and the impeller is arranged at one end of the spindle box, which is far away from the motor; the impeller is connected with the crankshaft and synchronously rotates; the wind guide cover is arranged to cover the spindle box, and a wind guide channel is formed between the inner wall of the wind guide cover and the outer wall of the spindle box; the air guide cover is also provided with an air inlet corresponding to the impeller and an air outlet corresponding to the cylinder body, and the air inlet and the air outlet are respectively communicated with the air guide channel.

The impeller is connected with the crankshaft and directly rotates along with the crankshaft, so that an additional power source is not needed, the overall structure is simplified, and the space utilization rate is improved. Meanwhile, the impeller and the crankshaft rotate synchronously, namely the cooling assembly and the compressor work synchronously, so that the risk of insufficient cooling caused by faults of the cooling assembly is reduced, and the stable work of the compressor is ensured. The air guide cover is arranged to guide cooling air flow to flow out from the air outlet through the air guide channel, so that the spindle box and the cylinder body are sequentially cooled, and the cooling effect is good.

Preferably, the wind scooper is provided with a protective net for covering the wind inlet.

Preferably, the outer wall of the cylinder body is provided with a heat dissipation channel which penetrates through the whole cylinder body along the height direction of the cylinder body, the air outlet is arranged towards the heat dissipation channel, and the heat dissipation channel plays a role in heat transfer and drainage.

Preferably, the crankshaft is connected with the impeller through a coupling.

Preferably, the coupling comprises a first coupling element and a second coupling element, and the first coupling element and the second coupling element are separately arranged and detachably connected; the crankshaft comprises an eccentric section for mounting a connecting rod, a connecting hole is arranged on the first coupling element, and the axis of the connecting hole is parallel to and does not coincide with the axis of the supporting shaft; the second coupling element is provided with a support shaft, and the support shaft is rotatably and movably connected with the spindle box; the eccentric section of the crankshaft is connected with the connecting hole, and the impeller is connected with the supporting shaft and synchronously rotates.

The connection between a connecting rod and a crankshaft in a piston structure is always an assembly difficulty, and the existing assembly modes mainly comprise two modes, namely, the first mode is that the end part of the connecting rod is arranged into a split mode and is used for being connected with the crankshaft; and the other type is that the size of the connecting hole on the connecting rod is set to be larger. However, assembly in any form is relatively auxiliary, and certain restrictions are imposed on the strength design of the connecting rod and the crankshaft.

And in this application, directly be connected with eccentric section through first shaft coupling component, the connecting rod can directly overlap and establish on eccentric section, and the assembly degree of difficulty reduces, has also reduced the restriction to connecting rod and bent axle intensity design simultaneously. During assembly, the axis of the support shaft on the second coupling element is required to be coincident with the rotation center line of the crankshaft, and the eccentric distance of the connecting hole relative to the axis of the support shaft is equal to the distance between the eccentric section and the rotation center line of the crankshaft. The matching first coupling element can be exchanged for compressors of different piston strokes.

Preferably, the first coupling element and the second coupling element are both in a strip shape; one of the first coupling element and the second coupling element is provided with an insertion groove along the length direction, and the other part or the whole is inserted into the insertion groove and is in interference fit with the insertion groove, so that the assembly is simple and convenient.

Preferably, at least one side wall of the insertion groove is layered with a plurality of clamping sections along the length direction, the adjacent two clamping sections are arranged in a disconnected mode, the side wall of the insertion groove is arranged in a segmented mode, and during insertion assembly, each clamping section is independently stressed and deformed, so that the resistance of the first coupling element and the second coupling element during insertion assembly can be reduced.

Preferably, a positioning assembly is further arranged between the first coupling element and the second coupling element, the positioning assembly comprises a positioning pin and a positioning shaft hole which are matched with each other, one of the positioning pin and the positioning shaft hole is arranged on the first coupling element, and the other one of the positioning pin and the positioning shaft hole is arranged on the second coupling element. The positioning assembly plays a role in auxiliary positioning and improving the assembly precision.

Preferably, the number of the machine bodies is two; the motor is arranged between the two machine bodies and is respectively connected with the crankshafts in the two machine bodies.

Preferably, two cylinder bodies are arranged on each spindle box and distributed in a V shape.

Drawings

Fig. 1 is a schematic structural view of an oil-free piston type air compressor with end cooling according to the embodiment;

fig. 2 is a partial sectional view of an end-cooled oil-free piston type air compressor of the present embodiment;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is an exploded view of a connecting structure of a crankshaft and an impeller in the oil-free piston type air compressor with end cooling according to the embodiment;

fig. 5 is a schematic structural view of a second coupling member in the end-cooled oil-free piston type air compressor of the present embodiment.

Detailed Description

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

Examples

As shown in fig. 1 and 2, an end-cooled oil-free piston type air compressor includes a motor 1 and a machine body 2, wherein the machine body 2 includes a main spindle box 21 and a cylinder body 22, a crankshaft 211 is disposed in the main spindle box 21, and the motor 1 is connected with one end of the crankshaft 211 and drives the crankshaft 211 to rotate. The outer wall of the cylinder 22 is provided with a heat dissipation channel 221 which penetrates through the whole cylinder 22 along the height direction of the cylinder 22. The number of the machine bodies 2 is preferably two; the motor 1 is arranged between the two machine bodies 2 and is respectively connected with the crankshafts 211 in the two machine bodies 2. Each spindle box 21 is provided with two cylinder bodies 22, and the two cylinder bodies 22 are distributed in a V shape.

As shown in fig. 2 and 3, the electric spindle further comprises a cooling assembly, wherein the cooling assembly comprises an impeller 4 and a wind scooper 3, and the impeller 4 is arranged at one end of the spindle box 21 far away from the motor 1. The impeller 4 is connected with the crankshaft 211 and rotates synchronously. The wind guide cover 3 is arranged to cover the spindle box 21, and a wind guide channel 33 is formed between the inner wall of the wind guide cover 3 and the outer wall of the spindle box 21. The air guiding cover 3 is further provided with an air inlet 32 corresponding to the impeller 4 and an air outlet 31 corresponding to the cylinder body 22, and the air inlet 32 and the air outlet 31 are respectively communicated with an air guiding channel 33. The air outlet 31 is disposed toward the heat dissipation channel 221, and the air guiding cover 3 is provided with a protective net covering the air inlet 32.

Impeller 4 is connected with bent axle 211 to directly rotate along with bent axle 211, need not additionally to set up the power supply, simplified overall structure, improved space utilization. Meanwhile, the impeller 4 and the crankshaft 211 synchronously rotate, namely the cooling assembly and the compressor synchronously work, so that the risk of insufficient cooling caused by faults of the cooling assembly is reduced, and the stable work of the compressor is ensured. The air guide cover 3 guides the cooling air flow to flow out from the air outlet through the air guide channel 33, and cools the headstock 21 and the cylinder 22 in sequence, so that the cooling effect is good.

As shown in fig. 2 to 5, the crankshaft 211 is connected to the impeller 4 by a coupling 5. The coupling 5 comprises a first coupling element 51 and a second coupling element 52, wherein the first coupling element 51 and the second coupling element 52 are arranged separately and detachably connected. The crankshaft 211 comprises an eccentric section 212 for mounting a connecting rod, and a supporting section connected with the motor 1, wherein the supporting section is rotatably and movably connected with the main spindle box 21. The first coupling element 51 is provided with a connecting hole 512, the axis of the connecting hole 512 is parallel to and does not coincide with the axis of the support shaft 521, and the eccentric section 212 of the crankshaft 211 is connected with the connecting hole 512, preferably by a screw. The second coupling element 52 is provided with a support shaft 521, the support shaft 521 is rotatably and movably connected with the main spindle box 21, and the impeller 4 is connected with the support shaft 521 and synchronously rotates.

Through the direct connection with eccentric section 212 of first shaft coupling component 51, the connecting rod can directly overlap and establish on eccentric section 212, and the assembly degree of difficulty reduces, has also reduced the restriction to connecting rod and bent axle intensity design simultaneously. During assembly, it is necessary to ensure that the axis of the support shaft 521 on the second coupling member 52 coincides with the rotation center line of the crankshaft, and the eccentric distance of the connecting hole 512 relative to the axis of the support shaft 521 is equal to the distance between the eccentric section 212 and the rotation center line of the crankshaft. The matching first coupling element 51 can be exchanged for compressors of different piston strokes.

As shown in fig. 2 to 5, the first coupling element 51 and the second coupling element 52 are both in a long strip shape, one of the first coupling element 51 and the second coupling element 52 is provided with an insertion groove 523 along a length direction, and the other one of the first coupling element 51 and the second coupling element 52 is partially or wholly inserted into the insertion groove 523 and is in interference fit with the insertion groove 523, so that the assembly is simple and convenient.

As shown in fig. 5, at least one side wall of the insertion groove 523 is layered with a plurality of clamping segments 522 along the length direction, two adjacent clamping segments 522 are arranged in a disconnected manner, the side wall of the insertion groove 523 is arranged in a segmented manner, and each clamping segment 522 is separately stressed and deformed during insertion assembly, so that the resistance of the first coupling element 51 during insertion assembly with the second coupling element 52 can be reduced.

As shown in fig. 4 and 5, a positioning assembly is further disposed between the first coupling element 51 and the second coupling element 52, the positioning assembly includes a positioning pin 511 and a positioning shaft hole 524, which are mutually matched, one of the positioning pin 511 and the positioning shaft hole 524 is disposed on the first coupling element 51, and the other is disposed on the second coupling element 52. The positioning assembly plays a role in auxiliary positioning and improving the assembly precision.

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

Claims

1. An oil-free piston type air compressor with a cooled end part comprises a motor and a machine body, wherein the machine body comprises a main shaft box and a cylinder body, a crankshaft is arranged in the main shaft box, and the motor is connected with one end of the crankshaft and drives the crankshaft to rotate; the method is characterized in that:

the cooling assembly comprises an impeller and an air guide cover, and the impeller is arranged at one end of the spindle box, which is far away from the motor; the impeller is connected with the crankshaft and synchronously rotates; the wind guide cover is arranged to cover the spindle box, and a wind guide channel is formed between the inner wall of the wind guide cover and the outer wall of the spindle box; the air guide cover is also provided with an air inlet corresponding to the impeller and an air outlet corresponding to the cylinder body, and the air inlet and the air outlet are respectively communicated with the air guide channel.

2. An oil-free piston type air compressor as claimed in claim 1, wherein: the wind scooper is provided with a protective net for covering the air inlet.

3. An oil-free piston type air compressor as claimed in claim 1, wherein: the outer wall of the cylinder body is provided with a heat dissipation channel which penetrates through the whole cylinder body along the height direction of the cylinder body, and the air outlet is arranged towards the heat dissipation channel.

4. An oil-free piston type air compressor as claimed in any one of claims 1 to 3, wherein: the crankshaft is connected with the impeller through a coupling.

5. An oil-free piston type air compressor as claimed in claim 4, wherein: the coupler comprises a first coupling element and a second coupling element, wherein the first coupling element and the second coupling element are separately arranged and detachably connected;

the crankshaft comprises an eccentric section for mounting a connecting rod, a connecting hole is arranged on the first coupling element, and the axis of the connecting hole is parallel to and does not coincide with the axis of the supporting shaft; the second coupling element is provided with a support shaft, and the support shaft is rotatably and movably connected with the spindle box; the eccentric section of the crankshaft is connected with the connecting hole, and the impeller is connected with the supporting shaft and synchronously rotates.

6. An oil-free piston type air compressor as claimed in claim 5, wherein: the first coupling element and the second coupling element are both in a strip shape; one of the first coupling element and the second coupling element is provided with an insertion groove along the length direction, and the other coupling element is partially or integrally inserted into the insertion groove.

7. An oil-free piston type air compressor as claimed in claim 6, wherein: at least one side wall of the insertion groove is layered with a plurality of clamping sections along the length direction, and the adjacent two clamping sections are disconnected.

8. An oil-free piston type air compressor as claimed in claim 5, wherein: still be equipped with locating component between first coupling component and the second coupling component, locating component including the locating pin post and the location shaft hole of mutually supporting, locating pin post and location shaft hole one of them set up on first coupling component, another setting is on the second coupling component.

9. An oil-free piston type air compressor as claimed in any one of claims 1 to 3, and 5 to 8, wherein: the number of the machine bodies is two; the motor is arranged between the two machine bodies and is respectively connected with the crankshafts in the two machine bodies.

10. An oil-free piston type air compressor as claimed in claim 9, wherein: each spindle box is provided with two cylinder bodies which are distributed in a V shape.