Dustproof structure of oilless air compressor crankcase

Abstract

The utility model provides a dustproof structure of an oilless air compressor crankcase, and belongs to the technical field of air compressors. The problem that parts in a crankcase of an existing air compressor are prone to damage is solved. The dustproof structure of the oilless air compressor crankcase comprises the crankcase, a heat dissipation fan blade and an outer port of the crankcase, a fan cover covering the outer port is arranged on the crankcase, the heat dissipation fan blade is arranged on the inner side of the fan cover, a filter piece is arranged on the front side or the rear side of the heat dissipation fan blade, and after the heat dissipation fan blade rotates, the filter piece is arranged on the outer port of the crankcase. Cooling air flows through the filter and then is blown into the crankcase by the heat dissipation fan blades, or the cooling air flows into the crankcase after being blown to the filter by the heat dissipation fan blades. According to the structure, attached dust or dust and other impurities are remarkably reduced through filtered cooling air, so that the cooling air blown to parts in the crankcase is pure and does not damage the parts, and the service life of the parts is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air compressor technical field, especially a dustproof structure of oil -free air compressor crankcase. BACKGROUND

[0002] Air compressor is a kind of equipment that can compress gas, and can be divided into oil-free air compressor and oil lubrication air compressor according to lubrication mode, with the development of air compressor field, oil-free air compressor will be more and more valued in the industry. The existing oil-free air compressor generally includes crankcase, the outer port of crankcase is provided with a fan cover, the crankcase is provided with a cooling fan blade, the cooling fan blade, the crankcase is further provided with a main shaft and a connecting rod, the connecting rod is arranged on the eccentric wheel of the main shaft through the bearing sleeve, the main shaft rotates and drives the cooling fan blade to rotate, the cooling fan blade rotates and makes the external air enter the crankcase through the fan cover, and then blows on the bearing and connecting rod and other parts, to cool the parts in the crankcase.

[0003] The existing air compressor has the following defects in the way of cooling the parts in the crankcase: the external air is mixed with dust or dust, especially in the use environment of poor air environment, the dust or dust in the air is very much, after the external air directly enters the inside of the crankcase, the dust or dust is adsorbed on the shaft, eccentric wheel, connecting rod and bearing and other parts, so that these parts are easy to wear or damage, and the service life of these parts is reduced. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned problems existing in the prior art, and provides a dustproof structure of oil-free air compressor crankcase, and the technical problem to be solved by the utility model is how to solve the problem that the internal parts of the crankcase of the existing air compressor are easy to damage.

[0005] The utility model can be realized by the following technical schemes:

[0006] A dustproof structure of oil-free air compressor crankcase, including crankcase and cooling fan blade, the outer port of crankcase, the crankcase is provided with the fan cover covering the outer port, the cooling fan blade is arranged on the inner side of fan cover, characterized by, the front side or back side of cooling fan blade is provided with filter sheet, when cooling fan blade rotates, cooling wind flows through filter sheet and is blown to the inside of crankcase by cooling fan blade or cooling wind is blown to filter sheet by cooling fan blade and then enters the inside of crankcase.

[0007] After the air compressor works, the cooling fan blades rotate, and the external air flows through the fan cover and the filter piece, or the external air flows through the filter piece and the fan cover into the crankcase, or the external air flows through the fan cover and is blown by the cooling fan blades to the filter piece and then enters the crankcase; the air entering the crankcase is filtered by the filter piece, and the filter piece filters out dust and other impurities in the gas, and the filtered cooling air blows on the main shaft, connecting rod, eccentric wheel and bearing and other parts in the crankcase, and the filtered cooling air significantly reduces the attached dust and other impurities, so that the cooling air blown on the parts in the crankcase is relatively pure and will not damage the parts, prolonging the service life of the parts. In addition, in order to increase the air intake per unit time, a larger cooling fan blade can be designed to ensure better cooling effect on the parts in the crankcase.

[0008] In the dustproof structure of the crankcase of the oil-free air compressor, the fan cover comprises an outer fan cover and an inner fan cover, and the filter piece is arranged between the outer fan cover and the inner fan cover, and the outer fan cover and the inner fan cover clamp and position the filter piece. In this structure, the filter piece is arranged between the outer fan cover and the inner fan cover, and after the cooling fan blades rotate, the external air first flows through the outer fan cover, then flows through the filter piece, and finally flows through the inner fan cover into the crankcase, and then is blown by the cooling fan blades to the parts in the crankcase for cooling and temperature reduction.

[0009] In the dustproof structure of the crankcase of the oil-free air compressor, an inner air inlet hole is formed in the fan cover, the filter piece is arranged on the side wall of the fan cover, and the filter piece covers the position of the inner air inlet hole. The filter piece is fixed on the side wall of the fan cover, facilitating the installation of the filter piece.

[0010] In the dustproof structure of the crankcase of the oil-free air compressor, the filter piece is arranged on the outer side wall of the fan cover. When the inner cooling fan blades rotate, the external air first flows through the filter piece and then enters the crankcase through the inner air inlet hole. The filter piece is arranged on the outer side of the crankcase, facilitating the disassembly and replacement of the filter piece.

[0011] In the dustproof structure of the crankcase of the oil-free air compressor, the outer side wall of the fan cover has a mounting groove recessed inward, the inner air inlet hole is formed on the bottom surface of the mounting groove, and the filter piece is embedded in the mounting groove. The embedded design of the filter piece reduces the size of the air compressor in the axial direction.

[0012] In the dustproof structure of the crankcase of the oil-free air compressor, the grid support plate is arranged in the crankcase, the grid support plate is located at the inner side of the heat dissipation fan blade, and the filter disc is fixed on the grid support plate. The filter disc is fixed on the grid support plate, and the grid support plate supports and positions the filter disc. After the heat dissipation fan blade rotates, external air flows into the crankcase through the fan cover, and then the cooling air is blown to the filter disc by the heat dissipation fan blade. The cooling air flows through the filter disc and the grid support plate and enters the inside of the crankcase.

[0013] In the dustproof structure of the crankcase of the oil-free air compressor, the heat dissipation fan blade comprises an inner heat dissipation fan blade and an outer axial flow fan blade arranged along the periphery of the inner heat dissipation fan blade, and the outer axial flow fan blade is fixed on the inner heat dissipation fan blade. The outer side wall of the crankcase has two or more cylinder seats, each cylinder seat is provided with a cylinder assembly, the axial projection of the outer axial flow fan blade at least partially coincides with the cylinder seat or the cylinder assembly, and the outer axial flow fan blade can blow air towards the cylinder seat. The inner heat dissipation fan blade and the outer axial flow fan blade rotate synchronously, the inner heat dissipation fan blade dissipates heat and cools the parts in the crankcase, and the cooling air formed after the rotation of the outer axial flow fan blade is directly blown on the cylinder assembly, thereby simultaneously dissipating heat and cooling the cylinder assemblies on each cylinder seat, and improving the heat dissipation and cooling effect of each cylinder assembly.

[0014] In the dustproof structure of the crankcase of the oil-free air compressor, the inner air inlet hole has a plurality of inner air inlet holes, and all the inner air inlet holes are arranged at positions corresponding to the inner heat dissipation fan blade. The position of the inner air inlet hole facilitates air intake.

[0015] In the dustproof structure of the crankcase of the oil-free air compressor, the outer axial flow fan blade is located in the fan cover, and the outer air inlet hole is arranged on the outer side wall of the fan cover corresponding to the position of the outer axial flow fan blade. The outer air inlet hole is used for air intake of the outer axial flow fan blade, the fan cover guides the flow direction of the cooling air, thereby ensuring that the cooling air is blown on the cylinder assembly to the greatest extent, and further improving the heat dissipation and cooling effect of the cylinder assembly.

[0016] In the dustproof structure of the crankcase of the oil-free air compressor, the outer air inlet hole has a plurality of outer air inlet holes, and all the outer air inlet holes are arranged in a ring shape. This structure is conducive to air intake after the rotation of the outer axial flow fan blade, and has good air intake effect.

[0017] Compared with the prior art, the dustproof structure of the oil-free air compressor crankcase has the following advantages: after the inner heat dissipation fan blade of the structure rotates, the air on the outer air baffle of the air baffle, the filter piece or the filter piece, and the inner air inlet hole enter the crankcase, the air entering the crankcase is filtered by the filter piece, the filter piece filters out dust or dust and other impurities in the gas, and the filtered cooling air blows on the main shaft, connecting rod, eccentric wheel and bearing and other parts in the crankcase, so that the parts in the crankcase are cooled and cooled, and the filtered cooling air significantly reduces the dust and other impurities, so that the cooling air blown on the parts in the crankcase is relatively pure, and damage to the parts is avoided, and the service life of the parts is prolonged. In addition, in order to improve the air inlet amount per unit time, the size of the inner heat dissipation fan blade can be designed to be larger, so that the cooling effect of the parts in the crankcase is better. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the explosion structure schematic diagram of the utility model embodiment 1.

[0019] Figure 2 is the cross section structure schematic diagram of the utility model embodiment 2.

[0020] Figure 3 is the three-dimensional structure schematic diagram of the air baffle of the utility model embodiment 2.

[0021] Figure 4 is the local three-dimensional structure schematic diagram of the utility model embodiment 2.

[0022] Figure 5 is the cross section structure schematic diagram of the utility model embodiment 3.

[0023] In the drawing, 1, crankcase; 100, cylinder base; 2, heat dissipation fan blade; 3, outer port; 4, air baffle; 40, inner air inlet hole; 41, mounting groove; 42, outer air inlet hole; 43, outer air baffle; 44, inner air baffle; 5, filter piece; 6, outer axial flow fan blade; 7, cylinder assembly; 8, inner heat dissipation fan blade; 9, grid support plate. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the utility model and is further described in conjunction with the drawings, but the utility model is not limited to these embodiments.

[0025] Embodiment 1

[0026] As Figure 1As shown, the dustproof structure of the crankcase of this oil-free air compressor includes a crankcase 1 and a cooling fan 2. The crankcase 1 has an outer port 3, and a fan shroud 4 covering the outer port 3. The cooling fan 2 is disposed inside the fan shroud 4, and a filter 5 is disposed behind the cooling fan 2. In this embodiment, the fan shroud 4 includes an outer fan shroud 43 and an inner fan shroud 44. The filter 5 is disposed between the outer fan shroud 43 and the inner fan shroud 44, and the outer fan shroud 43 and the inner fan shroud 44 clamp and position the filter 5. When the cooling fan 2 rotates, the cooling air flows sequentially through the outer fan shroud 43, the filter 5, and the inner fan shroud 44 before being blown into the crankcase by the cooling fan 2.

[0027] Example 2

[0028] like Figure 2 , Figure 3 and Figure 4 As shown, the dustproof structure of the crankcase of this oil-free air compressor includes a crankcase 1 and a cooling fan 2. The cooling fan 2 includes an inner cooling fan 8 and an outer axial flow fan 6 arranged radially around the inner cooling fan 8. The inner cooling fan 8 can be an axial flow fan or a centrifugal fan. The air compressor includes a main shaft that extends into the crankcase, and the inner cooling fan 8 is sleeved on the main shaft. The crankcase 1 has an outer port 3, and a fan cover 4 that covers the outer port 3. The inner cooling fan 8 is disposed inside the fan cover 4, and the fan cover 4 has an inner air inlet 40. In this embodiment, there are several inner air inlets 40, and all inner air inlets 40 are located at the positions corresponding to the inner cooling fan 8. The filter 5 is disposed on the outer wall of the fan shroud 4, covering the position of the inner air inlet 40. In this embodiment, the outer wall of the fan shroud 4 has an inwardly recessed mounting groove 41, and the inner air inlet 40 is opened on the bottom surface of the mounting groove 41. The filter 5 is embedded in the mounting groove 41. When the inner cooling fan blade 8 rotates, the outside air flows through the filter 5 and the inner air inlet 40 in sequence into the crankcase 1. After the air compressor starts working, the internal cooling fan 2 rotates, and outside air flows sequentially through the filter 5 and the internal air inlet 40 into the crankcase 1. The air entering the crankcase 1 is filtered by the filter 5, which removes dust and other impurities. The filtered cooling air is then blown onto components inside the crankcase 1, such as the main shaft, connecting rod, eccentric wheel, and bearings, to dissipate heat and cool them. The filtered cooling air significantly reduces the amount of dust and other impurities, resulting in cleaner cooling air that won't damage the components and extends their service life. Furthermore, to increase the airflow per unit time, a larger internal cooling fan 8 can be designed to ensure better cooling of the components inside the crankcase 1.

[0029] like Figure 2 and Figure 4As shown, the inner heat dissipation fan blade 8 is provided with an outer axial flow fan blade 6 along the radial periphery, and the outer axial flow fan blade 6 is fixed on the inner heat dissipation fan blade 8; the outer side wall of the crankcase 1 has two or more than two cylinder blocks 100, and each cylinder block is provided with a cylinder assembly 7, and the axial projection of the outer axial flow fan blade 6 along the crankcase 1 at least partially coincides with the cylinder block 100 or the cylinder assembly 7, and the outer axial flow fan blade 6 can blow air to the cylinder block 100. The inner heat dissipation fan blade 8 and the outer axial flow fan blade 6 rotate synchronously, the inner heat dissipation fan blade 8 cools the parts inside the crankcase 1, and the cooling air formed after the rotation of the outer axial flow fan blade 6 directly blows on the cylinder assembly 7, simultaneously cools the cylinder assembly 7 on each cylinder block 100, and improves the cooling effect of each cylinder assembly 7.

[0030] As shown in the figure, Figure 2 The outer axial flow fan blade 6 is located in the fan cover 4, and the outer side wall of the fan cover 4 is provided with an outer air inlet hole 42 corresponding to the position of the outer axial flow fan blade 6. In this embodiment, the outer air inlet hole 42 has a plurality of outer air inlet holes 42, and all the outer air inlet holes 42 are annularly distributed. The outer air inlet hole 42 is used for the air inlet of the outer axial flow fan blade 6, and the fan cover 4 plays a guiding role in the flow direction of the cooling air, so as to maximize the guarantee of the cooling air blowing on the cylinder assembly 7, and further improve the cooling effect of the cylinder assembly 7.

[0031] Embodiment 3

[0032] As shown in the figure, Figure 5 In this embodiment, a grid support plate 9 is arranged in the crankcase 1, and the grid support plate 9 is located on the inner side of the heat dissipation fan blade 2, and the filter piece 5 is fixed on the grid support plate 9. This structure fixes the filter piece 5 on the grid support plate 9, and the grid support plate 9 supports and positions the filter piece 5. After the heat dissipation fan blade 2 rotates, the external air first flows through the fan cover 4 into the crankcase 1, and then the cooling air is blown to the filter piece 5 by the heat dissipation fan blade 2. The cooling air flows through the filter piece 5 and the grid support plate 9 and enters the inside of the crankcase 1.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A dustproof structure of an oil-free air compressor crankcase, comprising a crankcase (1) and a heat dissipation fan blade (2), an outer port (3) of the crankcase (1), a fan cover (4) on the crankcase (1) covering the outer port (3), and the heat dissipation fan blade (2) being arranged on the inner side of the fan cover (4), characterized in that, The front side or the back side of the heat dissipation fan blade (2) is provided with a filter sheet (5), when the heat dissipation fan blade (2) rotates, the cooling air flows through the filter sheet and is blown to the inside of the crankcase by the heat dissipation fan blade (2), or the cooling air is blown to the filter sheet (5) by the heat dissipation fan blade (2) and then enters the inside of the crankcase (1).

2. The dustproof structure of the crankcase of the oil-free air compressor according to claim 1, characterized in that, The air baffle (4) comprises an outer air baffle (43) and an inner air baffle (44), the filter sheet is arranged between the outer air baffle (43) and the inner air baffle (44), and the outer air baffle (43) and the inner air baffle (44) clamp and position the filter sheet (5).

3. The dustproof structure of the crankcase of the oil-free air compressor according to claim 1, characterized in that, The air baffle (4) is provided with an inner air inlet hole (40), the filter sheet (5) is arranged on the side wall of the air baffle (4), and the filter sheet (5) covers the position of the inner air inlet hole (40).

4. The dustproof structure of the crankcase of the oil-free air compressor according to claim 3, characterized in that, The filter sheet (5) is arranged on the outer side wall of the air baffle (4).

5. The dustproof structure of the crankcase of the oil-free air compressor according to claim 4, characterized in that, The outer side wall of the air baffle (4) has a mounting groove (41) recessed towards the inside, the inner air inlet hole (40) is arranged on the bottom surface of the mounting groove (41), and the filter sheet (5) is embedded in the mounting groove (41).

6. The dustproof structure of the crankcase of the oil-free air compressor according to claim 1, characterized in that, The crankcase (1) is provided with a grid support plate (9), the grid support plate (9) is located on the inner side of the heat dissipation fan blade (2), and the filter sheet (5) is fixed on the grid support plate (9).

7. The dustproof structure of the crankcase of the oil-free air compressor according to claim 1, characterized in that, The heat dissipation fan blade (2) comprises an inner heat dissipation fan blade (8) and an outer axial flow fan blade (6) arranged along the periphery of the inner heat dissipation fan blade (8), the outer axial flow fan blade (6) is fixed on the inner heat dissipation fan blade (8), the outer side wall of the crankcase (1) has two or more cylinder seats (100), each cylinder seat is provided with a cylinder assembly (7), the axial projection of the outer axial flow fan blade (6) at least partially coincides with the cylinder seat (100) or the cylinder assembly (7), and the outer axial flow fan blade (6) can blow air towards the cylinder seat (100).

8. The dustproof structure of the crankcase of the oil-free air compressor according to claim 7, characterized in that, The air baffle (4) is provided with an inner air inlet hole (40), and the inner air inlet hole (40) has a plurality of inner air inlet holes (40), all the inner air inlet holes (40) are arranged at positions corresponding to the inner heat dissipation fan blade (8).

9. The dustproof structure of the crankcase of the oil-free air compressor according to claim 7, characterized in that, The outer axial flow fan blade (6) is located in the air baffle (4), and the outer side wall of the air baffle (4) is provided with an outer air inlet hole (42) corresponding to the position of the outer axial flow fan blade (6).

10. The dustproof structure of the crankcase of the oil-free air compressor according to claim 8, characterized in that, The outer air inlet hole (42) has a plurality of outer air inlet holes (42), and all the outer air inlet holes (42) are distributed in a ring shape.

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