CN216044239U - Four-cylinder air compressor - Google Patents

Abstract

The utility model discloses a four-cylinder air compressor, comprising: the fan is arranged at one end of the crankcase and used for driving air around the crankcase to flow, the 4 air compression assemblies are arranged around the axis of the crankcase, and the projections of the 4 air compression assemblies in the axis direction of the crankcase are not overlapped; the surfaces of the fan, crankcase and 4 air compressor components together define a plenum passage. In this scheme, 4 air compression subassemblies are in crankcase axis direction, and the projection is not overlapped in the direction that the cooling air flows promptly, and 4 air compression subassemblies all can fully carry out the heat exchange with the cooling air, and the cooling air of this scheme is more abundant with the heat exchange on air compression subassembly surface promptly, and the cooling effect of this scheme is better.

Description

Four-cylinder air compressor

Technical Field

The utility model relates to the technical field of air compressors, in particular to a four-cylinder air compressor.

Background

In order to improve the working efficiency of the air compressor, the four-cylinder air compressor is more and more widely applied.

Four cylinder air compressors set up four air compression subassemblies on the crankcase usually, and four air compression subassemblies are continuous do work in the use and produce the heat, if the heat dissipation is untimely, then it is very likely to influence cylinder normal work and life.

Patent document [ CN201520679652.2] proposes a four-cylinder air compressor and a heat dissipation structure in the four-cylinder air compressor, in the technical scheme, four cylinders, that is, four air compression assemblies, are designed on the air compressor, fans are respectively installed at two ends of a motor shaft, and the fans drive surrounding air to flow after being started, so that cooling air can be formed along the axial direction of the motor shaft; however, the projections of the four air compression assemblies in the axial direction of the motor shaft are partially overlapped, which results in that the heat exchange effect of the four air compression assemblies and the cooling air is not ideal.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the four-cylinder air compressor which can exchange heat with cooling air more fully.

The utility model is realized by the following technical scheme:

a four-cylinder air compressor comprising: the fan is arranged at one end of the crankcase and used for driving air around the crankcase to flow, the 4 air compression assemblies are arranged around the axis of the crankcase, and the projections of the 4 air compression assemblies along the axis direction of the crankcase are not overlapped; the surfaces of the fan, crankcase and 4 air compressor components together define a plenum passage.

Furthermore, the cooling device is further included, and the fan is arranged between the cooling device and the crankcase; the cooling device is communicated with the air compression assembly through a plurality of pipelines, and the pipelines are arranged outside the rotating outline of the fan.

Further, the cooling device comprises an intercooler and an aftercooler, and the intercooler is connected with the aftercooler; the 4 air compression assemblies comprise 3 primary compression assemblies and 1 secondary compression assembly, one end of the intercooler is respectively communicated with the 3 primary compression assemblies, and the other end of the intercooler is communicated with the secondary compression assemblies; the aftercooler is communicated with the second-stage compression assembly.

Furthermore, a crankshaft is arranged in the crankcase, each air compression assembly comprises an air cylinder, a piston and a connecting rod, one end of the connecting rod is movably connected with the piston, and the other end of the connecting rod is movably connected with the crankshaft; the crankshaft drives the piston to move through the connecting rod, the piston is arranged in the cylinder, and the piston is in sliding contact with the inner wall of the cylinder.

Further, still include the motor, the motor sets up in another tip of crankcase, and the motor is used for driving the bent axle rotation.

Compared with the prior art, the utility model has the advantages that:

1. in the prior art, the wind direction of cooling wind is parallel to the axis direction of a crankcase, and the projection parts of 4 air compression assemblies in the axis direction of the crankcase are overlapped, so that the partial structure of the air compression assemblies cannot fully exchange heat with the cooling wind, and the wind cooling effect of the air compression assemblies is not ideal; in this scheme, 4 air compression subassemblies are in crankcase axis direction, and the projection is not overlapped in the direction that cooling air flows promptly, but circulation cooling air in the pressure boost passageway, 4 air compression subassemblies all can fully carry out the heat exchange with the cooling air, and the cooling air of this scheme is more abundant with the heat exchange on air compression subassembly surface promptly, and the cooling effect of this scheme is better.

2. The fan of this scheme sets up between cooling device and crankcase, and the fan starts the operation, and the fan can drive the air flow around the cooling device to also can accelerate the heat exchange rate between cooling device and its surrounding air, and then play good radiating effect to cooling device.

3. In the scheme, 3 primary compression assemblies are communicated with an intercooler, and a secondary compression assembly is arranged between the intercooler and an aftercooler and is respectively communicated with the intercooler and the aftercooler; the compressed air generated by the first-stage compression assembly is gathered in the intercooler, cooled by the intercooler and then flows to the second-stage compression assembly; compressed air generated after the compression of the second-stage compression assembly is cooled by the aftercooler, so that the temperature of finally formed compressed air is reduced, and the compressed air is convenient to store.

4. This scheme is equipped with the bent axle, drives 4 compression assembly motion through 1 bent axle.

Drawings

FIG. 1 is a schematic view of the overall structure of a four-cylinder air compressor of the present invention;

FIG. 2 is an angled partial cross-sectional view of FIG. 1;

FIG. 3 is a cross-sectional view at another angle from FIG. 1;

FIG. 4 is a schematic view of the internal structure of the area A in FIG. 2;

FIG. 5 is a schematic structural diagram of the connection relationship between the connecting rod, the piston, the cylinder and the crankshaft;

fig. 6 is a schematic structural diagram of the flywheel coupling.

11-13-a first-stage compression assembly, 14-a second-stage compression assembly, 16-a crankcase, 17-a cooling device, 171-an intercooler, 172-an aftercooler, 18-a front flange, 19-a fan, 20-a crankshaft, 21-a flywheel coupling, 211-a counterweight flange, 22-a motor, 23-a cylinder, 24-a piston, 25-a connecting rod and 26-a bearing.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 to 3, a four-cylinder air compressor includes: the air compressor comprises a fan 19, a crankcase 16 and 4 air compression assemblies, wherein the fan 19 is arranged at one end of the crankcase 16, the fan 19 is used for driving air around the crankcase 16 to flow, the 4 air compression assemblies are arranged around the axis of the crankcase 16, and the projections of the 4 air compression assemblies along the axis direction of the crankcase do not overlap; the fan 19, the surface of the crankcase 16 and the surfaces of the 4 air compressor packages together define a plenum passage.

Specifically, a fan 19 is arranged at one end of the crankcase 16, the fan 19 is used for driving air in the supercharging channel to flow, the flowing air forms cooling air, and the direction of the cooling air is directed to the crankcase 16 by the fan 19; 4 air compressor modules are arranged around the axis of the crankcase 16, and cooling air can exchange heat with the air compressor modules. Preferably, the weight of the 4 air compressor packages is the same.

In the prior art, the wind direction of cooling wind is parallel to the axial direction of a crank case 16, and the projection parts of 4 air compression assemblies in the axial direction of the crank case 16 are overlapped, so that when the cooling wind blows towards the 4 air compression assemblies, only 2 air compression assemblies can fully exchange heat with the cooling wind, and the other 2 air compression assemblies can only exchange heat with the cooling wind through the side surfaces of the air compression assemblies, but the front surfaces of the air compression assemblies cannot fully exchange heat with the cooling wind, so that the wind cooling effect of the air compression assemblies is not ideal; in the scheme, the projections of the 4 air compression assemblies in the flowing direction of cooling air are not overlapped, the cooling air generated by the fan can blow to the front and the side of any air compression assembly, under the condition that the pressure of the cooling air in the scheme is consistent with that of the cooling air in the prior art, the 4 air compression assemblies in the scheme can fully exchange heat with the cooling air generated by the same fan, only two air compression assemblies in a comparison file form sufficient heat exchange with the cooling air generated by one fan, and in terms of changing the angle, the cooling air generated by one fan in the scheme can take away more heat on the surfaces of the 4 air compression assemblies, so that the cooling effect of the scheme is better. In addition, in the prior art, because the air cooling effect is not ideal, a plurality of heat dissipation holes and ventilation holes need to be arranged on the outer wall of the crankcase 16; in this scheme, because 4 air compression assembly's the mode of arranging for 4 air compression assemblies can fully carry out the heat exchange with the cooling air, in the course of working of crankcase 16, can omit and set up louvre and ventilation hole, and the structure of this scheme is simpler, has reduced the processing technology degree of difficulty. Finally, in the prior art, 4 air compression assemblies are arranged on one side of the axis of the crankcase 16 and are concentrated, the scheme can cause the integral gravity center of the air compressor to shift towards the air compression assemblies, and the air compressor is easy to vibrate in the operation process; in this scheme, 4 air compression subassemblies are for crankcase 16 and are the central angle of same grade and arrange for the holistic center of air compressor machine is 16 axis coincidence with the crankcase basically, makes the organism more stable, is favorable to reducing vibrations.

With further reference to fig. 2, a cooling device 17 is included, and a fan 19 is disposed between the cooling device 17 and the crankcase 16; the cooling device 17 communicates with the air compression assembly via a number of ducts, which are arranged outside the rotational contour of the fan 19.

Specifically, the cooling device further comprises a front flange 18, the front flange 18 is arranged between the cooling device 17 and the crankcase 16, a fan 19 is arranged in the contour limited by the front flange 18, and one side of the cooling device 17 is detachably connected with one end of the front flange 18; the main shaft of the fan 19 is connected with the crankshaft 20, a plurality of blades are circumferentially arranged on the main shaft of the fan 19, and the crankshaft 20 can drive the main shaft of the fan 19 to rotate, so that the blades rotate, and cooling air is formed. The fan 19 of the scheme is arranged between the cooling device 17 and the crankcase 16, and when the fan 19 is started, the air around the cooling device 17 can be driven to flow, so that the heat exchange rate between the cooling device 17 and the air around the cooling device can be accelerated, and a good heat dissipation effect is further achieved on the cooling device 17.

With further reference to fig. 2 and 3, the cooling device 17 includes an intercooler 171 and an aftercooler 172, the intercooler 171 and the aftercooler 172 are connected, and preferably, the intercooler 171 and the aftercooler 172 are connected together by welding; the 4 air compression assemblies comprise 3 first-stage compression assemblies (11-13) and 1 second-stage compression assembly 14, one end of the intercooler 171 is communicated with the 3 first-stage compression assemblies (11-13) respectively, and the other end of the intercooler 171 is communicated with the second-stage compression assembly 14; the aftercooler 172 is in communication with the secondary compression assembly 14.

Specifically, 3 primary compression assemblies (11-13) are respectively communicated with the intercooler 171, and the secondary compression assembly 14 is arranged between the intercooler 171 and the aftercooler 172 and is respectively communicated with the intercooler 171 and the aftercooler 172; the 3 first-stage compression assemblies (11-13) can compress sucked gas, and it is noted that the 3 first-stage compression assemblies (11-13) do not compress simultaneously; the generated compressed air can be converged in the intercooler 171, the intercooler 171 can cool the gas compressed by 3 first-stage compression assemblies (11-13) for the first time, the compressed gas cooled by the intercooler 171 flows to the second-stage compression assembly 14, the second-stage compression assembly 14 compresses the compressed gas for the second time, and due to the arrangement of the intercooler 171, the situation that the compressed gas flowing into the second-stage compression assembly 14 is overheated is avoided, so that the compression efficiency of the second-stage compression assembly 14 is increased; after second compression is carried out to gas by second compression subassembly 14, compressed gas flows into aftercooler 172, and aftercooler 172 cools off the gas through second compression, and aftercooler 172 still is linked together with the gas vent, and the secondary compressed gas that cools off through aftercooler 172 is discharged and is stored from the gas vent, because the setting of aftercooler 172 for finally form compressed air temperature reduces, is convenient for collect and save.

Further, in this scheme, cooling device 17 has integrated intercooler 171 and aftercooler 172, intercooler 171 and aftercooler 172 fixed connection together install in one side of crankcase 16, avoided among the prior art, intercooler 171 and aftercooler 172 occupy a large amount of installation space respectively, and in this scheme, cooling device 17 has integrated intercooler 171 and aftercooler 172, and intercooler 171 and aftercooler 172 connect, have effectively reduced the installation space of intercooler 171 and aftercooler 172. Preferably, the shells of the intercooler 171 and the aftercooler 172 are regular rectangular parallelepiped structures; of course, in other alternative embodiments, the housings of the intercooler 171 and the aftercooler 172 may have other cubic structures. Preferably, the intercooler 171 and the aftercooler 172 are each a fin cooler, and patent document [ CN106918253A ] discloses the internal structure and the operation principle of such a fin cooler; of course, the intercooler 171 and the aftercooler 172 in this embodiment may also be other cooler structures in the prior art, which are not described herein again.

With further reference to fig. 3-5, a crankshaft 20 is disposed in the crankcase 16, each air compression assembly includes a cylinder 23, a piston 24 and a connecting rod 25, one end of the connecting rod 25 is movably connected with the piston 24, and the other end of the connecting rod 25 is movably connected with the crankshaft 20; the crankshaft 20 drives a piston 24 to move through a connecting rod 25, the piston 24 is disposed in the cylinder 23, and the piston 24 is in sliding contact with the inner wall of the cylinder 23.

Specifically, the projections of the 4 air compression assemblies along the axial direction of the crankcase 16 do not overlap, and preferably, the 4 air compression assemblies are arranged around the axial line of the crankcase 16 at equal central angles; simultaneously, the connecting rod 25 of every air compression subassembly all with bent axle 20 swing joint, this makes the bent axle rotatory in-process, and at every instant, all there are two air compression subassemblies simultaneously for the state of breathing in, and two air compression subassemblies are compression state simultaneously, and in fig. 5, the dotted line is the rotatory motion trail of bent axle 20, in this scheme, drives 4 piston link assembly motion simultaneously through 1 bent axle.

Further, the engine further comprises a motor 22, the motor 22 is disposed at the other end of the crankcase 16, and the motor 22 is used for driving the crankshaft 20 to rotate.

Specifically, referring to fig. 4, the crankshaft assembly further includes a flywheel coupling 21 and a bearing 26, the flywheel coupling 21 is sleeved on the outer side of the crankshaft 20, the bearing 26 is sleeved on the outer side of the flywheel coupling 21, the coupling 21 and the bearing 26 both abut against one side end face of the crankshaft 20, in process machining, the bearing 26 can be pressed and mounted to a preset bearing position of the crankcase 16 along the axial direction of the crankcase 16, after the press mounting of the bearing 26 is completed, an outer ring of the bearing 26 is in interference fit with an inner ring of the bearing position, then the crankshaft 20 is placed in an inner ring of the bearing 26, the axis of the crankshaft 20 is overlapped with the axis of the bearing 26 by using a tool, since the outer diameter of the crankshaft 20 is smaller than the diameter of the inner ring of the bearing 26, at this time, a first gap can be limited to be formed between the outer ring of the crankshaft 20 and the inner ring of the bearing 26, then the flywheel coupling 21 is pressed and mounted in the first gap, after the press mounting of the flywheel coupling 21 is completed, the inner ring of the flywheel coupling 21 is in interference fit with the outer ring of the crankshaft 20, the outer ring of the flywheel coupling 21 is in interference fit with the inner ring of the bearing 26. Thus, the axial installation space of the coupling 21 and the bearing 26 is effectively shortened in the axial direction of the crankshaft 20, and the installation position of the coupling 21 and the bearing 26 is more compact.

With further reference to fig. 2, 5 and 6, a counterweight convex edge 211 is arranged on the circumference of the flywheel coupling 21, the counterweight convex edge 211 integrally extends along the axis direction of the flywheel coupling 21 from one side of the flywheel coupling 21, and the arrangement of the counterweight convex edge 211 can increase the rotational inertia of the flywheel coupling 21 in the movement process, so that the rotation of the flywheel coupling 21 is more stable, and the vibration of the whole machine is reduced. An output shaft of the motor 22 is connected to the flywheel coupling 21, and when the motor 22 is started, the output shaft of the motor 22 can drive the crankshaft 20 to rotate through the flywheel coupling 21.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (5)

1. A four-cylinder air compressor comprising: the air compressor comprises a fan (19), a crankcase (16) and 4 air compression assemblies, wherein the fan (19) is arranged at one end of the crankcase (16), and the fan (19) is used for driving air around the crankcase (16) to flow, and is characterized in that the 4 air compression assemblies are arranged around the axis of the crankcase (16), and the projections of the 4 air compression assemblies along the axis direction of the crankcase (16) are not overlapped; the fan (19), the surface of the crankcase (16) and the surfaces of the 4 air compression assemblies together define a plenum passage.

2. The four-cylinder air compressor according to claim 1, characterized by further comprising a cooling device (17), wherein the fan (19) is disposed between the cooling device (17) and the crankcase (16); the cooling device (17) is communicated with the air compression assembly through a plurality of pipelines, and the pipelines are arranged outside the rotating contour of the fan (19).

3. The four-cylinder air compressor according to claim 2, wherein the cooling device (17) includes an intercooler (171) and an aftercooler (172), the intercooler (171) being connected to the aftercooler (172); the 4 air compression assemblies comprise 3 first-stage compression assemblies (11-13) and 1 second-stage compression assembly (14), one end of the intercooler (171) is communicated with the 3 first-stage compression assemblies (11-13) respectively, and the other end of the intercooler (171) is communicated with the second-stage compression assembly (14); the aftercooler (172) is in communication with the secondary compression assembly (14).

4. The four-cylinder air compressor as claimed in claim 3, wherein a crankshaft (20) is provided in the crankcase (16), each air compression assembly includes a cylinder (23), a piston (24) and a connecting rod (25), one end of the connecting rod (25) is movably connected with the piston (24), and the other end of the connecting rod (25) is movably connected with the crankshaft (20); the crankshaft (20) drives the piston (24) to move through the connecting rod (25), the piston (24) is arranged in the cylinder (23), and the piston (24) is in sliding contact with the inner wall of the cylinder (23).

5. The four-cylinder air compressor of claim 4, further comprising a motor (22), wherein the motor (22) is disposed at the other end of the crankcase (16), and the motor (22) is used for driving the crankshaft (20) to rotate.

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