CN115492743A - Box, cylinder body, air compressor and car - Google Patents

Abstract

The invention relates to the technical field of air compression, in particular to a box body, a cylinder body, an air compressor and an automobile. The box body is provided with a first channel and a first heat dissipation surface, wherein the first channel is limited in the box body, the first heat dissipation surface is a part of the outer surface of the box body, and the first heat dissipation surface covers the first channel in a semi-surrounding state; the box body is provided with an air guide channel which is communicated with the first channel in a tee-joint shape, wherein the air guide channel and the outer surface of the box body form an air guide port; the box body is provided with a first channel and a first heat dissipation surface, so that the box body guides compressed air to flow in the box body through the first channel, and the first channel is further structured; the first channel is covered with a first heat dissipation surface, the compressed air flowing through the first channel can form heat exchange with the atmosphere through the first heat dissipation surface, and the heat exchange structure formed by the first channel and the first heat dissipation surface enables the box body of the embodiment to be integrated with the heat exchange structure of the cold row in the prior art.

Description

Box, cylinder body, air compressor and car

Technical Field

The invention relates to the technical field of air compression, in particular to a box body, a cylinder body, an air compressor and an automobile.

Background

In the prior art, a patent document with the application number of 201920120642.3 is provided, wherein the patent document is named as a symmetrical two-stage compression oil-free piston air compressor; in the prior art, a motor, a crankcase, a high pressure cylinder, a low pressure cylinder and a cold row are specifically arranged; the two crank cases are respectively arranged at two axial ends of the motor, one crank case is provided with a high-pressure cylinder, the other crank case is provided with a low-pressure cylinder, the cold row is arranged on a motor shell of the motor, and the cold row is located between the high-pressure cylinder and the low-pressure cylinder.

In the prior art, on one hand, the cold discharge position is arranged on the motor casing, and occupies a certain space, so that the volume of the air compressor in the prior art is large; on the other hand, the cold row is located between the high-pressure cylinder and the low-pressure cylinder, a high-pressure air inlet pipe needs to be arranged between the high-pressure cylinder and the cold row, and a low-pressure exhaust pipe needs to be arranged between the low-pressure cylinder and the cold row, so that gaps between the cold row and the high-pressure cylinder and between the cold row and the low-pressure cylinder are small, and the heat dissipation efficiency of the cold row is low.

How to integrate the heat transfer structure that low pressure blast pipe among the prior art, cold row and high-pressure air inlet pipe constitute at the air compressor machine itself, become the technical problem that solves.

Disclosure of Invention

The invention provides a box body, a cylinder body, an air compressor and an automobile, and aims to solve the technical problem of integrating a heat exchange structure consisting of a low-pressure exhaust pipe, a cold exhaust pipe and a high-pressure air inlet pipe in the prior art into an air compressor.

In order to achieve the purpose, the invention adopts the technical scheme that:

according to one aspect of the invention, a box body is provided with a first channel and a first heat dissipation surface, wherein the first channel is limited in the box body, the first heat dissipation surface is a part of the outer surface of the box body, and the first heat dissipation surface covers the first channel in a semi-surrounding state;

the box body is provided with an air guide channel which is communicated with the first channel in a tee-joint manner, wherein the air guide channel and the outer surface of the box body form an air guide port;

when the tank body is provided with the cylinder body, the air guide port is communicated with the second air guide port of the cylinder body.

Furthermore, the box body is also provided with a second channel and a second heat dissipation surface;

the second channel is limited in the box body, the second heat dissipation surface is the outer surface of the other part of the box body, and the second heat dissipation surface covers the second channel in a semi-surrounding state;

and two ends of the second channel are respectively provided with a flow guide channel, wherein the flow guide channels and the inner surface of the box body form an opening part.

According to one aspect of the present invention, there is provided a cylinder block provided with a third passage limited inside the cylinder block and a third heat radiating surface which is a part of an outer surface of the cylinder block and covers the third passage in a semi-enclosed state; a first flow guide port and a second flow guide port are formed on the surface of the cylinder body and the third channel;

when the cylinder body is arranged on the box body, the second flow guide port is communicated with the air guide port of the box body.

Further, a direction-changing channel is arranged at the second flow guide port;

the turning channel is recessed on the surface of the cylinder body and communicated with the third channel.

According to an aspect of the present invention, there is provided an air compressor including a tank and a cylinder;

the box body is provided with a first channel and a first heat dissipation surface, wherein the first channel is limited in the box body, the first heat dissipation surface is a part of the outer surface of the box body, and the first heat dissipation surface covers the first channel in a semi-surrounding state; the box body is provided with an air guide channel which is communicated with the first channel in a tee joint shape, wherein the air guide channel and the outer surface of the box body form an air guide port;

the number of the cylinder bodies is 2, and any one cylinder body is respectively provided with a third channel and a third radiating surface, wherein the third channel is limited in the cylinder body, the third radiating surface is one part of the outer surface of the cylinder body, and the third radiating surface covers the third channel in a semi-surrounding state; a first flow guide port and a second flow guide port are formed on the surface of the cylinder body and the third channel;

when the cylinder body is arranged on the box body, the air guide port is communicated with the second air guide port.

Furthermore, the box body is also provided with a second channel and a second heat dissipation surface;

the second channel is limited in the box body, the second heat dissipation surface is the outer surface of the other part of the box body, and the second heat dissipation surface covers the second channel in a semi-surrounding state;

and two ends of the second channel are respectively provided with a flow guide channel, wherein the second channel and the inner surface of the box body form an opening.

Further, a direction-changing channel is arranged at the second flow guide port;

the direction-changing channel is recessed on the surface of the cylinder body and communicated with the third channel.

Furthermore, the box body is provided with an installation cavity, and a box sleeve, a bearing, a motor and a crankshaft are arranged in the installation cavity;

the contour of the installation cavity is mutually isolated from the contour of the first channel and the contour of the second channel respectively, and the installation cavity is communicated with the second channel through the flow guide channel;

the number of the box sleeves, the number of the bearings and the number of the crankshafts are respectively 2;

a preset space is reserved between the two box sleeves, any one box sleeve is provided with a mounting hole, and any one box sleeve forms interference fit with the box body;

the motor comprises a stator, a rotor and a motor shaft, the stator is positioned around the outside of the rotor, and the motor shaft penetrates through the rotor, wherein the stator, the rotor and the motor shaft are respectively limited between the two box sleeves;

one of the bearings is arranged in any one of the mounting holes, wherein the bearing is penetrated by the motor shaft and is in interference fit with the box sleeve;

any one of the crankshafts is arranged at any end of the motor shaft respectively, wherein an installation groove is formed in each crankshaft, an installation opening is formed between a groove cavity of each installation groove and the surface of each crankshaft, the motor shaft is inserted into the installation grooves through the installation openings, any one of the bearings is sleeved on the corresponding crankshaft at the installation openings, and the bearings are in interference fit with the corresponding crankshafts;

the material of case cover includes iron, the material of bearing includes iron.

Further, a cooling device is arranged on the box body;

the cooling device at least comprises a cooling fan, the cooling fan is located between the two cylinder bodies, the cooling fan is provided with a positive pressure end and a negative pressure end, the positive pressure end faces the high-pressure cylinder head assembly, and the negative pressure end faces the low-pressure cylinder head assembly.

According to an aspect of the invention, there is provided an automobile comprising an air compressor as described above.

The technical scheme has the following advantages or beneficial effects:

according to the air compressor provided by the invention, the box body with the first channel and the first radiating surface is arranged, so that the box body guides the compressed air to flow in the box body through the first channel, and the structure of the first channel replaces the structures of a part of low-pressure exhaust pipes, cold exhaust pipes and a part of high-pressure air inlet pipes in the prior art; the first channel is covered with a first heat dissipation surface, the compressed air flowing through the first channel can form heat exchange with the atmosphere through the first heat dissipation surface, and the heat exchange structure formed by the first channel and the first heat dissipation surface enables the box body of the embodiment to be integrated with the heat exchange structure of the cold row in the prior art.

Drawings

Fig. 1 is a sectional view of an air compressor provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a box provided in embodiment 1 of the present invention;

fig. 3 is a sectional view of an air compressor provided in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a cylinder provided in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a cylinder provided in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of an air compressor provided in embodiment 1 of the present invention;

FIG. 7 is an enlarged view of section I of FIG. 3;

fig. 8 is a schematic structural view of a valve plate and a valve plate provided in embodiment 1 of the present invention.

Detailed Description

Example 1:

in the present embodiment, referring to fig. 1 to 5, there is provided an air compressor characterized by comprising a case 1 and a cylinder 2;

the box body 1 is provided with a first channel 101 and a first heat dissipation surface 102, wherein the first channel 101 is limited in the box body 1, the first heat dissipation surface 102 is a part of the outer surface of the box body 1, and the first heat dissipation surface 102 covers the first channel 101 in a semi-surrounding state; an air guide channel 103 is arranged on the box body 1, the air guide channel 103 is communicated with the first channel 101 in a three-way manner, wherein an air guide opening 000 is formed between the air guide channel 103 and the outer surface of the box body 1;

the number of the cylinder bodies 2 is 2, each cylinder body 2 is provided with a third channel 201 and a third radiating surface 202, wherein the third channel 201 is limited in the cylinder body 2, the third radiating surface 202 is a part of the outer surface of the cylinder body 2, and the third radiating surface 202 covers the third channel 201 in a semi-surrounding state; the third channel 201 and the surface of the cylinder body 2 form a first diversion port 001 and a second diversion port 002;

when the cylinder block 2 is disposed on the tank body 1, the air guide port 000 communicates with the second air guide port 002.

In the prior art (a symmetrical two-stage compression oilless piston air compressor, patent document No. 201920120642.3), the cold row is located outside the high pressure cylinder, the low pressure cylinder, the motor and two crank cases, respectively, so that if the cold row is disposed inside one of the above parts after being modified, it only changes the position of the cold row, and the volume of the part integrated with the cold row function needs to be increased, for example: if the cold discharge function is integrated into the high-pressure cylinder, the volume of the high-pressure cylinder needs to be increased; for another example: if the cold row function is integrated inside the motor, the volume of the motor needs to be increased.

In the above prior art, from the research on the specific structure and function of the cold row, two characteristics of the cold row can be found: the first feature is that the compressed air can flow inside the cold row; the second characteristic is that the compressed air forms a heat exchange with the external atmosphere through the cold row during the flow of the compressed air inside the cold row. Correspondingly, in the prior art, the compressed air in the cold air exhaust is guided into the cold air exhaust by the low-pressure exhaust pipe, and the compressed air in the cold air exhaust is guided out of the cold air exhaust by the high-pressure intake pipe, so that it can be known that the high-pressure intake pipe and the low-pressure exhaust pipe only have functions of guiding the flow of the compressed air, and the high-pressure intake pipe and the low-pressure exhaust pipe do not have significant heat dissipation effects.

Referring to fig. 2 or 3, in the present embodiment, the first passage 101 provided in the casing 1 is located inside the casing 1, and the first passage 101 is used for the flow of the compressed air. The function of the first passage 101 for the flow of compressed air corresponds to the function of the low-pressure discharge pipe of the above-described prior art for the flow of compressed air, or corresponds to the function of the high-pressure intake pipe of the above-described prior art for the flow of compressed air, or corresponds to the function of the cold discharge pipe of the above-described prior art for the flow of compressed air.

Referring to fig. 2, in the present embodiment, the surface of the case 1 at the first passage 101 is defined as a first heat dissipation surface 102, and the first heat dissipation surface 102 covers the first passage 101 in a half-enclosed state; when the compressed air flows through the first channel 101, the compressed air in the first channel 101 exchanges heat with the atmosphere through at least the first heat dissipation surface 102; the function of the compressed air in the first channel 101 to exchange heat with the atmosphere through the first heat dissipation surface 102 is equivalent to the function of the compressed air in the prior art to exchange heat with the outside atmosphere through the cold discharge.

It should be understood that the coverage of the semi-enclosed state should be understood as: the projection of the overall contour of the first channel 101 and the overall contour of the first heat dissipation surface 102 on a certain plane has an overlap, and the distance between the inner wall of the first channel 101 and the first heat dissipation surface 102 is kept at a preset distance, for example: 1-10 mm.

The area of the first heat dissipation surface 102 will affect the heat exchange efficiency of the compressed air and the atmosphere; preferably, the surface of the case 1 at the first passage 101 is processed with a fin structure, so that the first heat radiating surface 102 presents an uneven curved surface, thereby increasing the area of the first heat radiating surface 102 and improving the heat exchange efficiency of the compressed air and the atmosphere.

In the prior art, the two crank cases are respectively connected to two axial ends of the motor, so that a detachable connecting structure is formed between the crank cases and the motor; in the above prior art, since the motor casing of the motor thereof does not have a 'channel for flowing compressed air', a person skilled in the art before seeing the present embodiment has no motivation to integrate the above prior art cold air discharging function into the motor casing of the prior art motor.

In this embodiment, the box 1 is at least used to replace the motor casing of the motor in the prior art, so that the box 1 can be designed and manufactured independently of the motor shaft, the stator, the rotor, and other parts of the motor, and the first channel 101 can be designed and manufactured on the box 1, which provides a basis for processing the first channel 101 compared with the box 1 in the prior art.

Referring to fig. 4 or 5, in the present embodiment, the cylinder block 2 is provided with a third passage 201 inside the cylinder block 2, and the third passage 201 is used at least for the flow of compressed air. The function of the third passage 201 for the flow of compressed air corresponds to that of the low-pressure discharge pipe of the above-described prior art, or corresponds to that of the high-pressure intake pipe of the above-described prior art.

It should be understood that, in the present embodiment, the cylinder block 2 is detachably provided with a cylinder cover (see fig. 1 or fig. 3), and the cylinder block 2 is further provided with a valve plate (see fig. 1 or fig. 3 or fig. 8), wherein the valve plate and the cylinder block 2 are detachably connected, or the valve plate and the cylinder block 2 are integrally formed; the cylinder cover covers the valve plate, so that an exhaust cavity or an air inlet cavity is formed between the cylinder cover and the valve plate; the valve plate is provided with a vent hole, and the vent hole is covered with a valve plate capable of being opened and closed (see fig. 8), so that compressed air in the compression cavity of the cylinder body 2 can be discharged into the exhaust cavity through the vent hole and then injected into the third channel 201 from the exhaust cavity, or compressed air in the third channel 201 is injected into the air inlet cavity, and compressed air in the air inlet cavity is injected into the compression cavity through the vent hole.

It should be understood that, in the present embodiment, a piston-link assembly (see fig. 1 or 3) is further provided, and a piston portion of the piston-link assembly is disposed in the compression chamber of the cylinder block 2; correspondingly, one end of a connecting rod part of the piston connecting rod assembly is positioned in the box body 1, and one end of the connecting rod part is connected with a crankshaft in the box body.

Referring to fig. 4 or 5, in the present embodiment, the surface of the cylinder block 2 located at the third passage 201 is defined as a third heat radiation surface 202, and the third heat radiation surface 202 covers the third passage 201 in a half-enclosed state; when the compressed air flows through the third channel 201, the compressed air in the third channel 201 exchanges heat with the atmosphere through at least the third heat dissipation surface 202; the function of the compressed air in the third channel 201 to exchange heat with the atmosphere through the third heat dissipation surface 202 is equivalent to the function of the compressed air in the prior art to exchange heat with the outside atmosphere through the cold air exhaust.

In the prior art, compressed air discharged from the low-pressure cylinder is discharged to the cold exhaust through the low-pressure exhaust pipe; in other words, the low pressure cylinder does not have a channel structure 'for circulating the compressed air in the low pressure cylinder, and on the basis, the low pressure cylinder does not have a heat exchange structure' for the compressed air and the atmosphere on the low pressure cylinder; correspondingly, the high-pressure cylinder sucks compressed air through a high-pressure air inlet pipe; in other words, the high pressure cylinder itself does not have a 'channel structure for circulating the compressed air in the high pressure cylinder', and on the basis of this, the high pressure cylinder itself does not have a 'heat exchange structure between the compressed air and the atmosphere on the high pressure cylinder'.

In the present embodiment, the cylinder 2 is provided with the third channel 201 through the third channel 201, so that the cylinder 2 has a 'channel structure for circulating the compressed air in the cylinder 2' through the third channel 201, and on this basis, a part of the outer surface of the cylinder 2 is provided with the third heat dissipation surface 202, so that the cylinder 2 has a 'heat exchange structure between the compressed air and the atmosphere on the cylinder 2' through the third channel 201 and the third heat dissipation surface 202.

The area of the third heat dissipation surface 202 will affect the heat exchange efficiency of the compressed air and the atmosphere; preferably, the surface of the cylinder body 2 at the third passage 201 is processed with a fin structure, so that the third heat radiating surface 202 presents an uneven curved surface, thereby increasing the area of the third heat radiating surface 202 and improving the heat exchange efficiency of the compressed air and the atmosphere.

In the following description, a cooling fan 7 is provided, and the cooling fan 7 can pressurize the air, so that the pressurized air rapidly flows through the surface of the third heat dissipation surface 202, thereby further improving the heat exchange efficiency between the compressed air and the atmosphere; wherein, the cylinder body 2 is provided with a heat radiating fin structure on the outer surface of the cylinder wall of the cylinder body 2 in addition to the third heat radiating surface 202, and the air pressurized by the cooling fan 7 can respectively flow through the third heat radiating surface 202 and the heat radiating fins of the cylinder wall, so that the pressurized air and the cylinder wall improve the heat exchange efficiency between the air in the compression chamber and the atmosphere.

According to the air compressor provided by the embodiment, the box body 1 with the first channel 101 and the first heat dissipation surface 102 is arranged, so that the box body 1 guides the compressed air to flow in the box body 1 through the first channel 101, and the structure of the first channel 101 replaces the structure of a part of a low-pressure exhaust pipe, a part of a cold exhaust pipe and a part of a high-pressure air inlet pipe in the prior art; the first channel 101 is covered with a first heat radiating surface 102, the compressed air flowing through the first channel 101 can form heat exchange with the atmosphere through the first heat radiating surface 102, and the heat exchange structure formed by the first channel 101 and the first heat radiating surface 102 enables the box body of the embodiment to be integrated with the heat exchange structure of the cold row in the prior art;

in addition, according to the air compressor provided by the embodiment, the cylinder body 2 having the third channel 201 and the third heat dissipation surface 202 is provided, so that the cylinder body 2 guides the compressed air to flow in the cylinder body 2 through the third channel 201, and the structure of the third channel 201 replaces the structure of a low-pressure exhaust pipe or a high-pressure intake pipe in the prior art; the third channel 201 is covered with a third heat dissipation surface 202, the compressed air flowing through the third channel 201 can form heat exchange with the atmosphere through the third heat dissipation surface 202, and the heat exchange structure formed by the third channel 201 and the third heat dissipation surface 202 changes the functions of a low-pressure exhaust pipe and a high-pressure intake pipe in the prior art, so that the cylinder body 2 in the embodiment is integrated with the heat exchange structure of a cold air exhaust in the prior art.

Therefore, the air compressor that this embodiment provided has solved how to integrate the heat transfer structure that low pressure blast pipe among the prior art, cold row and high-pressure intake pipe constitute at the technical problem of air compressor machine itself.

Further, referring to fig. 2, in the present embodiment, the box body 1 is further provided with a second channel 104 and a second heat dissipation surface 105;

the second channel 104 is limited in the box body 1, the second heat radiating surface 105 is the outer surface of the other part of the box body 1, and the second heat radiating surface 105 covers the second channel 104 in a semi-surrounding state;

two ends of the second channel 104 are respectively provided with a flow guide channel 106, wherein the flow guide channel 106 and the inner surface of the box body 1 form an opening.

In the above solution, it has been mentioned that the box 1 is provided with the motor shaft, the stator and the rotor of the motor, and the box 1 is provided with the crankshaft and other parts; these components can generate heat during operation, for example: current passes through the stator, so that the stator generates heat; therefore, during the actual operation of the air compressor provided in the present embodiment, heat accumulation may occur in the tank 1, which may cause the temperature of each component to exceed the operating temperature range.

In this embodiment, the heat exchange between the box 1 and the atmosphere is a main technical means for discharging the heat in the box 1 to the outside of the box 1.

In this embodiment, a motor (the motor does not include a motor housing) is disposed in the box body 1, so that the space in the box body 1 at two ends of the motor shaft is divided into a first space and a second space by the motor; the box body 1 is provided with a second channel 104, two ends of the second channel 104 are respectively provided with a flow guide channel 106, one flow guide channel 106 is exposed in the first space, and the other flow guide channel 106 is exposed in the second space; if the external air is first sucked into the first space, the air in the first space is sucked into the second passage 104 through the guide passage 106 exposed to the first space; the air flows in the second passage 104 so that the air in the second passage 104 absorbs the heat of the cabinet 1; the air in the second channel 104 is discharged to the second space through the guide channel 106 exposed to the second space; air in the second space is sucked into the cylinder block 2 through an air inlet passage on the piston and connecting rod assembly.

Therefore, before the air is sucked into the cylinder 2, the air flows through the second passage 104, so that the heat of the box 1 is absorbed by the air flowing through the second passage 104, forming a technical means of auxiliary heat exchange of the box 1; the tank 1 is used together with the above-mentioned auxiliary heat exchange means by direct heat exchange with the atmosphere, so that the temperature of the components inside the tank 1 is kept within a reasonable working temperature range.

Further, referring to fig. 2 or fig. 3, a diversion channel 003 is disposed at the second diversion port 002;

the turning passage 003 is recessed in the surface of the cylinder body 2, and the turning passage 003 is communicated with the third passage 201.

In this embodiment, the third channel 201 has a function of accommodating a bolt in addition to a function of circulating compressed air; specifically, the bolt penetrates through the first guide opening 001 and the second guide opening 002 of the cylinder block 2 so that the bolt can be connected to the threaded mounting hole of the tank body 1.

It should be understood that, referring to fig. 7, the bolt not only penetrates through the third channel 201 of the cylinder block 2, but also the bolt needs to penetrate through the cylinder cover, and since the exhaust chamber or the intake chamber is formed between the cylinder cover and the valve plate, the third channel 201 is communicated with the intake chamber or the exhaust chamber, which makes the diameter of the through hole in the cylinder cover, through which the bolt passes, smaller than the diameter of the third channel 003; in order to better seal the gap between the bolt and the cylinder cover, preferably, a first sealing washer is arranged between the bolt and the surface of the cylinder cover, and a second sealing washer is arranged between the bolt and the wall of the through hole of the cylinder cover, so that an ideal sealing effect is obtained by adopting the first sealing washer and the second sealing washer.

Under the condition that the turning channel 003 is not provided, if the bolt is connected to the box body 1, the threaded mounting hole on the box body 1 should be located deep in the box body 1, that is, the bolt needs to penetrate through the air guide channel 103 and the first channel 101 on the box body 1 after penetrating through the first flow guide opening 001 and the second flow guide opening 002 on the cylinder body 2, and meanwhile, compressed air is injected into the air guide channel 103 and the first channel 101 from a gap between the first flow guide opening 001 and the bolt, in this case, the thickness of the box body 1 needs to be made thicker, thereby increasing the volume of the box body 1;

on the contrary, if the screw-thread installation hole is provided on the surface of the case 1, the position of the screw-thread installation hole and the position of the air guide passage 103 conflict with each other; if the air guide channel 103 is directly modified into the threaded mounting hole, after the bolt penetrates through the first flow guide opening 001 and the second flow guide opening 002 on the cylinder body 2, although the bolt can be directly connected to the air guide channel 103 (threaded mounting hole) on the box body 1, the second flow guide opening 002 will be covered by the surface of the box body 1, so that the compressed air is retained at the intersection of the second flow guide opening 002 and the surface of the box body 1, and the compressed air is blocked by the surface of the box body 1 and the bolt and cannot be injected into the air guide channel 103 and the first channel 101.

In the present embodiment, referring to fig. 2, a threaded mounting hole 004 for attaching a bolt is provided on the surface of the case 1, specifically, the threaded mounting hole 004 is recessed toward the second passage 104 along the surface of the case 1, and the threaded mounting hole 004 may be provided as a through hole or a blind hole.

Referring to fig. 2 or 3, the screw-thread installation hole 004 is juxtaposed with the aforementioned air guide passage 103 so that the air guide passage 103 communicates with the first passage 101 through the turning passage 003 after the bolt is coupled to the screw-thread installation hole 004.

The specific shape of the diversion channel 003 is not limited in this embodiment, as long as the diversion channel 003 is communicated with the first channel 101, and the diversion channel 003 is communicated with the air guide channel 103.

Further, in the present embodiment, referring to fig. 1 to 3, the box body 1 is provided with an installation cavity 107, and the box sleeve 3, the bearing 4, the motor 5 and the crankshaft 6 are arranged in the installation cavity 107;

the outline of the mounting cavity 107 is mutually isolated from the outline of the first channel 101 and the outline of the second channel 104 respectively, and the mounting cavity 107 is communicated with the second channel 104 through the flow guide channel 106;

the number of the box sleeves 3, the number of the bearings 4 and the number of the crankshafts 6 are respectively 2;

a preset space is reserved between the two box sleeves 3, any one box sleeve 3 is provided with a mounting hole, and any one box sleeve 3 is in interference fit with the box body 1;

the motor 5 comprises a stator 501, a rotor 502 and a motor shaft 503, positioned around the outside of the rotor 502, the motor shaft 503 penetrating the rotor 502, wherein the stator 501, the rotor 502 and the motor shaft 503 are respectively confined between the two cases 3;

one of the bearings 4 is arranged in any one of the mounting holes, wherein the bearing 4 is penetrated by the motor shaft 503, and the bearing 4 is in interference fit with the box sleeve 3;

any end of the motor shaft 503 is provided with one of the crankshafts 6, wherein the crankshaft 6 is provided with an installation groove, a groove cavity of the installation groove and the surface of the crankshaft 6 form an installation opening, the motor shaft 503 is inserted into the installation groove through the installation opening, any one of the bearings 4 is sleeved on the crankshaft 6 at the installation opening, and the bearing 4 is in interference fit with the crankshaft 6;

the material of the case 3 includes iron, and the material of the bearing 4 includes iron.

Referring to fig. 2, the mounting cavity 107 penetrates through the box body 1, and a first mounting opening and a second mounting opening are formed on the surfaces of the mounting cavity 107 and the box body 1; referring to fig. 1 or fig. 3, the stator 501, the rotor 502 and the motor shaft 503 are first disposed in the mounting cavity 107 through the first mounting opening and/or the second mounting opening, and the combined structure of the stator 501, the rotor 502 and the motor shaft 503 is well known to those skilled in the art and will not be described herein again. It should be understood that, in the present embodiment, the first mounting opening and the second mounting opening of the box body 1 are respectively covered by box covers, and one of the box covers is provided with an air inlet interface.

Referring to fig. 1 or fig. 3, two bearings 4 are respectively arranged in the mounting holes of two tank sleeves 3, one bearing 4 is arranged in the mounting hole of any one tank sleeve 3, and the bearing 4 is in interference fit with the mounting hole; the two crankshafts 6 are respectively arranged on the two bearings 4, wherein any one bearing 4 is sleeved on the crankshaft 6 positioned in the mounting groove, and the bearing 4 and the crankshaft 6 form interference fit;

referring to fig. 1 or fig. 3, the combination of the first box 3, the bearing 4 and the crankshaft 6 is disposed in the mounting cavity 107 through a first mounting opening, wherein one end of a motor shaft 503 positioned in the first mounting cavity 107 is inserted into the mounting groove of the crankshaft 6, and a clearance fit is formed between the motor shaft 503 and the crankshaft 6; in order to ensure the synchronous rotation of the motor shaft 503 and the crankshaft 6 in the circumferential direction, it is preferable that the motor shaft 503 and the crankshaft 6 are respectively provided with a key groove, and a key pin is provided between the key groove of the motor shaft 503 and the key groove of the crankshaft 6, so as to ensure that the motor shaft 503 and the crankshaft 6 rotate synchronously and are not radially displaced from each other, and further, a threaded hole of the crankshaft 6 is provided on the crankshaft 6, the threaded hole of the crankshaft 6 communicates with the key groove of the crankshaft 6, and is connected with the threaded hole of the crankshaft 6 by a screw, and the screw contacts the key pin to achieve the axial positioning of the crankshaft 6 and the motor shaft 503.

It should be understood that, in other embodiments, the motor shaft 503 may also be provided with an external spline, and an internal spline is provided in the mounting groove, and the motor shaft 503 and the crankshaft 6 can also be rotated synchronously in the circumferential direction through the connection of the external spline and the internal spline; alternatively, in other embodiments, the motor shaft 503 and the crankshaft 6 may be connected by a taper sleeve structure.

Referring to fig. 1 or 3, the combination of the second case 3, the bearing 4 and the crankshaft 6 is disposed in the mounting cavity 107 through the second mounting opening, and the rest is the same as the assembly structure and the connection structure of the aforementioned combination of the first case 3, the bearing 4 and the crankshaft 6, respectively, and will not be described again.

In this embodiment, the material of the case 3 and the material of the bearing 4 are configured to be the same or similar, for example, the material of the case 3 and the material of the bearing 4 respectively include iron; the essence is as follows: the coefficient of expansion of the casing 3 and the coefficient of expansion of the bearing 4 are configured to be the same or similar.

In the prior art, the crankcase is usually supported by an aluminum alloy material, and the bearing 4 is made of steel (the steel contains iron), so that the difference between the expansion coefficient of aluminum and the expansion coefficient of the steel is large;

in this embodiment, the material of the case 3 and the material of the bearing 4 are set to be the same or similar (both contain iron), so that the expansion coefficient of the case 3 and the expansion coefficient of the bearing 4 are configured to be the same or have a relatively small difference in coefficient. Thereby avoiding the creeping phenomenon of the bearing 4 relative to the box sleeve 3 caused by the overlarge difference of the expansion coefficients of the box sleeve 3 and the bearing 4 when the air compressor is in a working state; the phenomenon of peristalsis is at least understood to be: a displacement in the circumferential direction is generated between the outer ring of the bearing 4 and the housing 3.

The box body 1 in the embodiment is made of an aluminum alloy material, and the box sleeve 3 in the embodiment comprises iron, so that a condition that the difference between the expansion coefficients of the aluminum alloy box body and the steel bearing in the prior art is large is formed between the box body 1 and the box sleeve 3; this puts higher demands on the connection between the box 1 and the box 3, such as: if a clearance fit mode is adopted between the box body 1 and the box sleeve 3, when the box body 1 and the box sleeve 3 are heated and expanded respectively, because the expansion coefficients of the box body and the box sleeve are different, and because the air compressor inevitably generates vibration in the working process or receives vibration transmitted by the practical application environment (such as vibration between an automobile and a road surface), phenomena such as loosening, separation, movement and the like of the box sleeve 3 relative to the box body 1 can occur.

Therefore, in the embodiment, the box body 1 and the box sleeve 3 are in interference fit, and when the box body 1 and the box sleeve 3 are respectively heated to expand and generate or receive vibration, the phenomena of loosening, separation, shifting and the like of the box sleeve 3 relative to the box body 1 are avoided; preferably, the case 1 and the case 3 may be positioned or fixed by a positioning pin a and/or a bolt B (see fig. 1), wherein the positioning pin a penetrates the case 1 and is inserted into the positioning hole of the case 3, and the bolt B penetrates the case 1 and is screwed into the threaded hole of the case 3; by adopting the positioning pin A and/or the bolt B, the phenomena of loosening, separation, play and the like of the box sleeve 3 relative to the box body 1 are avoided.

Further, referring to fig. 1 or fig. 3, a cooling device is disposed on the box body 1;

the cooling device at least comprises a cooling fan 7, the cooling fan 7 is positioned between the two cylinder bodies 2, the two cylinder bodies are respectively a high-pressure cylinder head and a low-pressure cylinder head, the cooling fan 7 is provided with a positive pressure end and a negative pressure end, the positive pressure end faces the high-pressure cylinder head, and the negative pressure end faces the low-pressure cylinder head.

Wherein, the cooling device is used for pressurizing air outside the air compressor, so that a high-pressure cylinder head at the positive pressure end of the cooling fan 7 exchanges heat with air at positive pressure, and a low-pressure cylinder head at the negative pressure end of the cooling fan 7 exchanges heat with air at negative pressure.

In the present embodiment, the air compressor may be configured as a vertical type air compressor, that is, the cylinder 2 is provided on the case 1 in a vertical direction; alternatively, the air compressor may be configured as a horizontal type air compressor, that is, the cylinder 2 is disposed on the case 1 in a horizontal direction, for example, a horizontal type air compressor is illustrated in fig. 6.

Referring to fig. 6, the cooling device further includes a shroud 8, and the shroud 8 covers the two cylinder heads and the cooling fan 7 in a radial direction of the cooling fan 7.

The shroud 8 can restrict the flow direction of the air in which the cooling fan 7 is left, so that the air pressurized by the cooling fan 7 can flow only in the axial direction of the cooling fan 7, but not in the radial direction of the cooling fan 7, thereby improving the heat exchange efficiency of the high-pressure cylinder head and the low-pressure cylinder head.

It should be understood that in addition to the fairings 8 on the horizontal air compressor, the fairings 8 may also be provided on the vertical air compressor; in the vertical air compressor, the cross section of the air guide sleeve 8 is configured to be 'zigzagged', and two sides of the air guide sleeve 8 are respectively detachably connected to the box body 1.

Example 2:

in the present embodiment, there is provided an automobile including the air compressor as in the foregoing embodiment 1.

The specific structure and technical effect of the air compressor in this embodiment are respectively the same as those of the air compressor in embodiment 1, and are not described herein again.

The automobiles in this embodiment include, but are not limited to: commercial vehicles and domestic vehicles; wherein, the commercial vehicle at least comprises a truck and a passenger car; the automobile comprises the following components from the perspective of a power source: fuel oil vehicles, pure electric vehicles, oil-electricity hybrid vehicles, hydrogen energy vehicles and the like.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The box body is characterized in that the box body is provided with a first channel and a first heat dissipation surface, wherein the first channel is limited in the box body, the first heat dissipation surface is one part of the outer surface of the box body, and the first heat dissipation surface covers the first channel in a semi-surrounding state;

the box body is provided with an air guide channel which is communicated with the first channel in a tee joint shape, wherein the air guide channel and the outer surface of the box body form an air guide port;

when the tank body is provided with the cylinder body, the air guide port is communicated with the second air guide port of the cylinder body.

2. The cabinet as claimed in claim 1, wherein the cabinet is further provided with a second passage and a second heat radiating surface;

the second channel is limited in the box body, the second heat dissipation surface is the outer surface of the other part of the box body, and the second heat dissipation surface covers the second channel in a semi-surrounding state;

and two ends of the second channel are respectively provided with a flow guide channel, wherein the flow guide channels and the inner surface of the box body form an opening part.

3. The cylinder body is characterized in that the cylinder body is provided with a third channel and a third radiating surface, wherein the third channel is limited in the cylinder body, the third radiating surface is a part of the outer surface of the cylinder body, and the third radiating surface covers the third channel in a semi-surrounding state; the third channel and the surface of the cylinder body form a first flow guide port and a second flow guide port;

when the cylinder body is arranged on the box body, the second flow guide port is communicated with the air guide port of the box body.

4. The cylinder body as claimed in claim 3, wherein a diversion channel is arranged at the second diversion port;

the direction-changing channel is recessed on the surface of the cylinder body and communicated with the third channel.

5. The air compressor is characterized by comprising a box body and a cylinder body;

the box body is provided with a first channel and a first heat dissipation surface, wherein the first channel is limited in the box body, the first heat dissipation surface is a part of the outer surface of the box body, and the first heat dissipation surface covers the first channel in a semi-surrounding state; the box body is provided with an air guide channel which is communicated with the first channel in a tee joint shape, wherein the air guide channel and the outer surface of the box body form an air guide port;

the number of the cylinder bodies is 2, and any one cylinder body is provided with a third channel and a third heat dissipation surface respectively, wherein the third channel is limited in the cylinder body, the third heat dissipation surface is one part of the outer surface of the cylinder body, and the third heat dissipation surface covers the third channel in a semi-surrounding state; a first flow guide port and a second flow guide port are formed on the surface of the cylinder body and the third channel;

when the cylinder body is arranged on the box body, the air guide port is communicated with the second air guide port.

6. The air compressor according to claim 5, wherein the case is further provided with a second passage and a second heat radiating surface;

the second channel is limited in the box body, the second heat dissipation surface is the outer surface of the other part of the box body, and the second heat dissipation surface covers the second channel in a semi-surrounding state;

and two ends of the second channel are respectively provided with a flow guide channel, wherein the second channel and the inner surface of the box body form an opening.

7. The air compressor as claimed in claim 5, wherein a turning passage is provided at the second flow guide port;

the direction-changing channel is recessed on the surface of the cylinder body and communicated with the third channel.

8. The air compressor as claimed in claim 6, wherein the case is provided with a mounting cavity, and a case housing, a bearing, a motor and a crankshaft are provided in the mounting cavity;

the contour of the installation cavity is mutually isolated from the contour of the first channel and the contour of the second channel respectively, and the installation cavity is communicated with the second channel through the flow guide channel;

the number of the box sleeves, the number of the bearings and the number of the crankshafts are respectively 2;

a preset distance is reserved between the two box sleeves, any one box sleeve is provided with a mounting hole, and any one box sleeve forms interference fit with the box body;

the motor comprises a stator, a rotor and a motor shaft, the stator is positioned around the outside of the rotor, and the motor shaft penetrates through the rotor, wherein the stator, the rotor and the motor shaft are respectively limited between the two box sleeves;

one of the bearings is arranged in any one of the mounting holes, wherein the bearing is penetrated by the motor shaft and is in interference fit with the box sleeve;

any end of the motor shaft is provided with one of the crankshafts respectively, wherein the crankshafts are provided with mounting grooves, mounting holes are formed in groove cavities of the mounting grooves and the surfaces of the crankshafts, the motor shaft is inserted into the mounting grooves through the mounting holes, any one of the bearings is sleeved on the crankshafts located at the mounting holes, and the bearings are in interference fit with the crankshafts;

the material of case cover includes iron, the material of bearing includes iron.

9. The air compressor according to claim 5, wherein a cooling device is provided on the case;

the cooling device at least comprises a cooling fan, the cooling fan is located between the two cylinder bodies, the cooling fan is provided with a positive pressure end and a negative pressure end, the positive pressure end faces the high-pressure cylinder head assembly, and the negative pressure end faces the low-pressure cylinder head assembly.

10. Automobile, characterized in that it comprises an air compressor according to claim 5.

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