Oil supply device for air compressor

Abstract

The present invention relates to the technical field of air compressors, and in particular to an oil supply device for an air compressor, comprising an oil tank, an oil pump, an oil filter device and a cooler installed on the air compressor, the oil filter device comprising a reversing seat, a first installation cavity and a second installation cavity being arranged in the reversing seat, an oil inlet pipe being coaxially arranged at one end of the first installation cavity, an oil outlet pipe being coaxially arranged at one end of the second installation cavity, auxiliary oil outlets being arranged on both sides of the first installation cavity, and auxiliary oil inlets being arranged on both sides of the second installation cavity, the oil filter device also comprises a main oil filter and an auxiliary oil filter, the main oil filter and the auxiliary oil filter are respectively connected with the auxiliary oil outlet and the auxiliary oil inlet located on the same side of the reversing seat; the oil inlet pipe and the oil outlet pipe are both provided with connecting pipes extending radially along their own axes, and the reversing seat is provided with a driving unit. The technical solution rotates the oil inlet pipe and the oil outlet pipe in the reversing seat through the driving unit to change the flow direction of the lubricating oil, thereby realizing the replacement of the filter element in the main oil filter without stopping the machine.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, and in particular to an oil supply device for an air compressor. Background Art

[0002] An air compressor is a device used to compress gas. Most air compressors are reciprocating piston type, with rotating blades or rotating screws. The oil supply device of an air compressor usually includes an oil tank, an oil pump, an oil filter and an oil cooler. The main function of the oil supply device is to provide sufficient lubricating oil for the various lubricating parts of the air compressor to reduce friction, reduce wear, protect machine parts, extend the service life of the equipment, and ensure efficient operation of the equipment. The oil circuit system of the air compressor is used to ensure that the lubricating parts of the air compressor are well lubricated. During use, the oil in the oil circuit system will carry the debris generated by the wear of various parts and move in the oil circuit.

[0003] The prior art usually uses an oil filter to filter the lubricating oil in the oil circuit. The oil filter filters out solid impurities and debris in the lubricating oil and accumulates them in the filter element. The staff is required to replace the filter element regularly, but the machine needs to be shut down when replacing the filter element to avoid debris moving in the oil circuit system during the replacement process and causing wear to the air compressor parts. The shutdown will have a moving impact on the use of the equipment. Summary of the invention

[0004] In view of the above problems, it is necessary to provide an air compressor oil supply device to address the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: an oil supply device for an air compressor, comprising an oil tank installed on the air compressor, an oil pump, an oil filter device and a cooler, the oil filter device comprising a reversing seat, a first mounting cavity and a second mounting cavity are arranged in the reversing seat, the axes of the first mounting cavity and the second mounting cavity are parallel, an oil inlet pipe is coaxially arranged at one end of the first mounting cavity, the oil inlet pipe is connected to a main oil inlet port arranged on the first mounting cavity, an oil outlet pipe is coaxially arranged at one end of the second mounting cavity, the oil outlet pipe is connected to a main oil outlet port at one end of the second mounting cavity; auxiliary oil outlet ports extending radially along the first mounting cavity are arranged on both sides of the first mounting cavity, and auxiliary oil outlet ports extending radially along the first mounting cavity are arranged on both sides of the second mounting cavity. A secondary oil inlet is provided which extends radially along the second installation cavity. The oil filtering device also includes a main oil filter and a secondary oil filter, which are respectively connected with the secondary oil outlet and the secondary oil inlet which are located on the same side of the reversing seat; the oil inlet pipe and the oil outlet pipe are both provided with connecting pipes which extend radially along their own axes; the reversing seat is provided with a driving unit which drives the oil inlet pipe and the oil outlet pipe to rotate around their own axes, and the driving unit makes the connecting pipes of the oil inlet pipe and the oil outlet pipe respectively connect with different secondary oil outlets and the secondary oil inlet; a pressure relief chamber is provided at one end of the oil inlet pipe and the oil outlet pipe which is away from the main oil inlet and the main oil outlet, and a pressure relief valve core is provided in the pressure relief chamber for reducing the oil pressure in the oil inlet pipe and the oil outlet pipe.

[0006] Preferably, a closed cover is installed on the connecting pipe of the oil inlet pipe and the oil outlet pipe, the curvature of the opening side of the closed cover is the same as the curvature of the first mounting cavity and the second mounting cavity, and the opening side of the closed cover fits the inner wall of the reversing seat; the first mounting cavity and the second mounting cavity of the reversing seat are both provided with a limiting ring rail surrounding the inner wall thereof, the closed cover is located in the limiting ring rail for limited movement, and the outer wall of the closed cover fits the inner wall of the limiting ring rail; the reversing seat is provided with a limiting strip at the connection between the first mounting cavity and the second mounting cavity, the limiting strip extends along the axis of the reversing seat, and when one side of the closed cover fits the limiting strip, the auxiliary oil outlet of the first mounting cavity and the auxiliary oil inlet of the second mounting cavity are located in the opening of the closed cover.

[0007] Preferably, a sealing block for sealing the pressure relief chamber is provided in the oil inlet pipe and the oil outlet pipe, and a first spring is provided in the pressure relief chamber. The first spring elastically connects the pressure relief valve core and the sealing block, and the elastic force of the first spring causes the pressure relief valve core to move away from one side of the sealing block.

[0008] Preferably, at least two guide blocks are arranged in the reversing seat, and the oil inlet pipe and the oil outlet pipe are inserted in the guide blocks; the outer walls of the oil inlet pipe and the oil outlet pipe are provided with surrounding annular grooves, and an annular clamping strip inserted in the annular grooves is arranged in the guide block.

[0009] Preferably, the drive unit includes meshing gears coaxially installed on the outside of the oil inlet pipe and the oil outlet pipe, and the meshing gears on the oil inlet pipe and the oil outlet pipe are meshingly connected; the drive unit also includes a turntable coaxially installed on the end of the oil inlet pipe away from the second installation cavity, and a locking unit for locking the rotation state of the turntable and the position of the pressure relief valve core in the blocking block is provided at the end of the reversing seat close to the turntable.

[0010] Preferably, the locking unit includes a movable seat, on which are provided two top columns, the axes of the top columns are respectively in the same straight line with the axes of the oil inlet pipe and the oil outlet pipe, and guide holes are provided at the axes of the blocking blocks that block the oil inlet pipe and the oil outlet pipe, and the top columns extend through the guide holes to fit the pressure relief valve core in the pressure relief chamber; two side slots symmetrical about the center of a circle are provided on the circumference of the turntable, and the connecting lines of the side slots are perpendicular to the axis of the connecting pipe, and an insert block with the same cross-sectional shape and size as the side slot is provided on the movable seat, and when the movable seat fits the reversing seat, the insert block is inserted into the side slot on the turntable close to one end of the movable seat.

[0011] Preferably, side slide grooves are provided on both sides of the movable seat, positioning blocks are slidably installed in the side slide grooves, and a plurality of second springs are provided in the side slide grooves. The second springs are elastically connected to the positioning blocks, and the elastic force of the second springs causes the positioning blocks to move to the outside of the movable seat and protrude from the side walls of the movable seat; the locking unit also includes two fixed blocks fixedly installed on the outside of the reversing seat, and a positioning socket is provided on one side of the fixed block that is in contact with the movable seat, and the positioning block is inserted in the positioning socket to fix the position of the movable seat.

[0012] Preferably, a limiting head is coaxially arranged at one end of the top column located inside the blocking block, and the outer diameter of the limiting head is larger than the diameters of the top column and the guide hole.

[0013] Preferably, a surrounding limiting ring is arranged outside the oil inlet pipe and the oil outlet pipe, and the meshing gear is installed in the limiting ring.

[0014] Preferably, a handle is provided on the turntable, and the handle is located on one side of the axis of the turntable.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, the oil filter device in the present invention comprises a reversing seat and a main oil filter and a sub-oil filter arranged on both sides of the reversing seat. The lubricating oil only passes through one of the main oil filter and the sub-oil filter. The staff can rotate the oil inlet pipe and the oil outlet pipe in the reversing seat through a driving unit. The connecting pipes on the oil inlet pipe and the oil outlet pipe are rotated to the sub-oil outlet and the sub-oil inlet on the other side of the reversing seat connected to the sub-oil filter to change the flow direction of the lubricating oil. The sub-oil filter keeps the oil circuit system unobstructed, so that the staff can replace the filter element in the main oil filter without stopping the machine.

[0017] Secondly, in the present invention, the presence of the pressure relief chamber and the pressure relief valve core in the oil inlet pipe ensures that when the staff switches the main oil filter and the auxiliary oil filter, the pressure in the oil circuit system will not damage the oil inlet pipe in a blocked state, thereby increasing the service life of the equipment.

[0018] Thirdly, a closing cover is installed on the connecting pipe in the present invention, and the opening side of the closing cover has the same curvature as the inner wall of the first installation cavity, so the opening side of the closing cover remains in contact with the inner wall of the first installation cavity. When the oil inlet pipe rotates, the connecting pipe drives the closing cover to move, and the opening side of the closing cover is blocked by the first installation cavity, so the lubricating oil will not leak.

[0019] Fourthly, the locking unit in the present invention can simultaneously lock the rotation state of the turntable and the position of the pressure relief valve core in the blocking block, thereby ensuring that during normal operation, the positions of the connecting pipes on the oil inlet pipe and the oil outlet pipe are fixed, and the position of the pressure relief valve core in the oil inlet pipe is fixed, maintaining the volume of the oil inlet pipe for the flow of lubricating oil, and ensuring that the lubricating oil flows to the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of an oil supply device for an air compressor;

[0021] Figure 2 It is a three-dimensional oil filter device of an air compressor oil supply device in the first working state. Figure 1 ;

[0022] Figure 3It is a three-dimensional oil filter device of an air compressor oil supply device in the first working state. Figure 2 ;

[0023] Figure 4 The present invention is a front view of an oil filter device of an air compressor oil supply device in a first working state;

[0024] Figure 5 yes Figure 4 A cross-sectional view at AA of FIG.

[0025] Figure 6 The invention is a side view of an oil filter device of an oil supply device of an air compressor in a first working state;

[0026] Figure 7 yes Figure 6 A cross-sectional view of the section at BB;

[0027] Figure 8 It is a three-dimensional diagram of an oil filter device of an air compressor oil supply device in a second working state;

[0028] Fig. 9 yes Figure 8 A partial enlarged view of point C;

[0029] Fig.10 It is a front view of an oil filter device of an air compressor oil supply device in a second working state;

[0030] Fig.11 yes Fig.10 Cross-sectional view at DD of FIG.

[0031] Fig.12 The three-dimensional structure of the oil filter device of the air compressor oil supply device Figure 1 ;

[0032] Fig.13 The three-dimensional structure of the oil filter device of the air compressor oil supply device Figure 2 .

[0033] The numbers in the figure are: 1, oil tank; 11, oil pump; 12, cooler; 2, oil filter device; 21, reversing seat; 211, first installation cavity; 212, second installation cavity; 213, main oil inlet; 214, main oil outlet; 215, auxiliary oil outlet; 216, auxiliary oil inlet; 217, limit ring rail; 218, limit strip; 22, oil inlet pipe; 221, connecting pipe; 222, pressure relief cavity; 223, closing cover; 224, blocking block; 225, first spring; 226, annular groove; 227, limit ring ; 228, guide hole; 23, oil outlet pipe; 24, main oil filter; 25, auxiliary oil filter; 26, pressure relief valve core; 27, drive unit; 271, meshing gear; 272, turntable; 273, side slot; 274, handle; 28, guide block; 281, annular clamping strip; 29, locking unit; 291, moving seat; 292, top column; 293, plug block; 294, side slide groove; 295, positioning plug block; 296, second spring; 297, fixing block; 298, positioning socket; 299, limit head. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Reference Figures 1 to 13 :

[0036] An air compressor oil supply device includes an oil tank 1 installed on the air compressor, an oil pump 11, an oil filter device 2 and a cooler 12, the oil filter device 2 includes a reversing seat 21, a first installation cavity 211 and a second installation cavity 212 are arranged in the reversing seat 21, and the axes of the first installation cavity 211 and the second installation cavity 212 are parallel (such as Figure 5 As shown in the figure, an oil inlet pipe 22 is coaxially arranged at one end of the first installation cavity 211, and the oil inlet pipe 22 is connected to a main oil inlet 213 arranged on the first installation cavity 211; an oil outlet pipe 23 is coaxially arranged at one end of the second installation cavity 212, and the oil outlet pipe 23 is connected to a main oil outlet 214 at one end of the second installation cavity 212; auxiliary oil outlets 215 (as shown in the figure) extending radially along the first installation cavity 211 are arranged on both sides of the first installation cavity 211 Figure 7As shown in the figure, the second installation cavity 212 is provided with auxiliary oil inlets 216 extending radially along the second installation cavity 212 on both sides, and the oil filter device 2 also includes a main oil filter 24 and an auxiliary oil filter 25, which are respectively connected to the auxiliary oil outlet 215 and the auxiliary oil inlet 216 located on the same side of the reversing seat 21; the oil inlet pipe 22 and the oil outlet pipe 23 are both provided with a connecting pipe 221 extending radially along their own axis, and the reversing seat 21 is provided with a driving The oil inlet pipe 22 and the oil outlet pipe 23 are driven by a driving unit 27 that rotates around their own axes, and the driving unit 27 makes the connecting pipes 221 of the oil inlet pipe 22 and the oil outlet pipe 23 respectively connect to different auxiliary oil outlets 215 and auxiliary oil inlets 216; the oil inlet pipe 22 and the oil outlet pipe 23 are provided with a pressure relief chamber 222 at one end away from the main oil inlet port 213 and the main oil outlet port 214, and the pressure relief valve core 26 for reducing the oil pressure in the oil inlet pipe 22 and the oil outlet pipe 23 is provided in the pressure relief chamber 222.

[0037] The oil supply device in the present application transports the lubricating oil in the oil tank 1 to various components of the air compressor through the oil pump 11. The oil filter device 2 is connected to the lubricating oil flowing into the cooler 12, and filters the impurities and debris contained therein. The lubricating oil cooled by the cooler 12 flows back to the oil tank 1 for recycling. The oil filter device 2 in this embodiment includes a reversing seat 21 and a main oil filter 24 and a secondary oil filter 25 arranged on both sides of the reversing seat 21. The lubricating oil with impurities enters the oil inlet pipe 22 from the main oil inlet 213 on the reversing seat 21, and enters the secondary oil outlet 215 on one side of the reversing seat 21 through the connecting pipe 221 of the oil inlet pipe 22, and then enters the input end of the main oil filter 24 connected to the secondary oil outlet 215. The main oil filter 24 filters the lubricating oil. Impurities, the filtered lubricating oil enters the secondary oil inlet 216 on one side of the reversing seat 21 from the output end of the main oil filter 24, and then enters the connecting pipe 221 of the oil outlet pipe 23 connected to the secondary oil inlet 216, and then is discharged to the main oil outlet 214 through the oil outlet pipe 23, enters the cooler 12 for cooling, and then circulates. After long-term use, there are a lot of impurities in the filter element in the main oil filter 24, which needs to be replaced. The staff only needs to rotate the oil inlet pipe 22 and the oil outlet pipe 23 in the reversing seat 21 through the driving unit 27, and rotate the connecting pipe 221 on the oil inlet pipe 22 and the oil outlet pipe 23 to the secondary oil outlet 215 and the secondary oil inlet 216 connected to the secondary oil filter 25 on the other side of the reversing seat 21. The secondary oil filter 25 keeps the oil system unobstructed. , so that the staff can replace the filter element in the main oil filter 24 without stopping the machine. When the oil inlet pipe 22 and the oil outlet pipe 23 are connected to the auxiliary oil filter 25, the lubricating oil in the oil circuit system still enters the auxiliary oil filter 25 through the oil inlet pipe 22, and is then discharged through the oil outlet pipe 23. The flow direction of the lubricating oil will not change, so the impurities originally remaining in the oil inlet pipe 22 will not flow back into the oil circuit system. The oil inlet pipe 22 in this embodiment is coaxially arranged in the first installation cavity 211 of the reversing seat 21, and the oil outlet pipe 23 is coaxially arranged in the second installation cavity 212 of the reversing seat 21. When the oil inlet pipe 22 and the oil outlet pipe 23 rotate around their own axes, the connecting pipe 221 moves in contact with the inner wall of the first installation cavity 211 or the second installation cavity 212. During the process, the connecting pipe 221 is kept blocked until the connecting pipe 221 is connected with the auxiliary oil outlet 215 or the auxiliary oil inlet 216 on the other side. Since the lubricating oil in the oil circuit system continues to enter the oil inlet pipe 22 through the main oil inlet 213 of the reversing seat 21, the oil pressure in the oil inlet pipe 22 increases. In order to prevent the oil pressure increase in the oil inlet pipe 22 from damaging the oil inlet pipe 22, a pressure relief chamber 222 is further provided in the oil inlet pipe 22. When the connecting pipe 221 is blocked and the oil pressure in the oil inlet pipe 22 increases, the pressure relief valve core 26 moves in the pressure relief chamber 222 to increase the volume in the oil inlet pipe 22 and thereby reduce the pressure in the oil inlet pipe 22. When the connecting pipe 221 is connected with the auxiliary oil outlet 215 on the other side, the pressure in the oil inlet pipe 22 is reduced, and the pressure relief valve core 26 can be reset.In this embodiment, the pressure relief chamber 222 and the pressure relief valve core 26 in the oil inlet pipe 22 ensure that when the staff switches the main oil filter 24 and the auxiliary oil filter 25, the pressure in the oil circuit system will not damage the oil inlet pipe 22 in the blocked state, thereby improving the service life of the equipment.

[0038] In order to ensure that the lubricating oil does not leak through the connecting pipe 221 during the movement of the connecting pipe 221, the following features are specifically set:

[0039] A closed cover 223 is installed on the connecting pipe 221 of the oil inlet pipe 22 and the oil outlet pipe 23. The curvature of the opening side of the closed cover 223 is the same as that of the first installation cavity 211 and the second installation cavity 212, and the opening side of the closed cover 223 fits the inner wall of the reversing seat 21; the first installation cavity 211 and the second installation cavity 212 of the reversing seat 21 are both provided with a limiting ring rail 217 surrounding the inner wall thereof, the closed cover 223 is located in the limiting ring rail 217 for limited movement, and the outer wall of the closed cover 223 fits the inner wall of the limiting ring rail 217; the reversing seat 21 is provided with a limiting strip 218 at the connection between the first installation cavity 211 and the second installation cavity 212, and the limiting strip 218 extends along the axis of the reversing seat 21, and when one side of the closed cover 223 fits the limiting strip 218, the auxiliary oil outlet 215 of the first installation cavity 211 and the auxiliary oil inlet 216 of the second installation cavity 212 are located in the opening of the closed cover 223.

[0040] The auxiliary oil outlets 215 in this embodiment are arranged on both sides of the first installation cavity 211 and the axes of the two auxiliary oil outlets 215 are kept on the same straight line. Similarly, the axes of the auxiliary oil inlets 216 on both sides of the second installation cavity 212 are also on the same straight line. Taking the oil inlet pipe 22 in the first installation cavity 211 as an example, the oil inlet pipe 22 located on the axis of the first installation cavity 211 can be rotated to move the connecting pipe 221 radially extending from the oil inlet pipe 22 to a position on the same straight line with the auxiliary oil outlets 215, so as to achieve separate communication with the auxiliary oil outlets 215 on both sides. Since the inner wall of the first installation cavity 211 is arc-shaped, a sealing cover 223 is installed on the connecting pipe 221 in this embodiment to seal The opening side of the cover 223 has the same curvature as the inner wall of the first installation cavity 211, so the opening side of the closed cover 223 remains in contact with the inner wall of the first installation cavity 211. When the oil inlet pipe 22 rotates, the connecting pipe 221 drives the closed cover 223 to move, and the opening side of the closed cover 223 is blocked by the first installation cavity 211, and the lubricating oil will not leak. When the connecting pipe 221 rotates to a position that is in the same straight line as the auxiliary oil outlet 215 on the other side, the auxiliary oil outlet 215 is located on the inner side of the opening of the closed cover 223, so the lubricating oil can flow to the input end of the auxiliary oil filter 25 through the auxiliary oil outlet 215. Similarly, the oil outlet pipe 23 is the same in the second installation cavity 212. When the closed cover 223 moves, the limiting ring rail 217 in the first installation cavity 211 and the second installation cavity 212 stabilizes the moving path of the closed cover 223. A limiting strip 218 is provided at the connection between the first installation cavity 211 and the second installation cavity 212. The limiting strip 218 is used to limit the moving range of the closed cover 223 in the first installation cavity 211 and the second installation cavity 212. When one side of the closed cover 223 is in contact with the limiting strip 218, the auxiliary oil outlet 215 or the auxiliary oil inlet 216 must be located in the opening of the closed cover 223, so that the staff can judge whether the lubricating oil enters the auxiliary oil filter 25 outside the reversing seat 21.

[0041] In order to achieve the purpose of pressure relief valve core 26 to relieve pressure when the pressure in oil inlet pipe 22 increases, the following features are specifically set:

[0042] A blocking block 224 for blocking the pressure relief chamber 222 is arranged in the oil inlet pipe 22 and the oil outlet pipe 23. A first spring 225 is arranged in the pressure relief chamber 222. The first spring 225 elastically connects the pressure relief valve core 26 and the blocking block 224. The elastic force of the first spring 225 causes the pressure relief valve core 26 to move away from the side of the blocking block 224.

[0043] In this embodiment, one end of the pressure relief chamber 222 of the oil inlet pipe 22 and the oil outlet pipe 23 is blocked by the blocking block 224, and a sealed space is formed between the pressure relief valve core 26 and the blocking block 224. The first spring 225 is located in the space and exerts elastic force to move the pressure relief valve core 26 away from the blocking block 224. A limit groove can be provided in the oil inlet pipe 22 to limit the maximum distance between the pressure relief valve core 26 and the blocking block 224. Under normal working conditions, the lubricating oil is located in the oil inlet pipe 22 and flows toward the connecting pipe 221. When the connecting pipe 221 is blocked and the oil pressure in the oil inlet pipe 22 increases, the pressure relief valve core 26 compresses the first spring 225 under the action of pressure and moves toward the side of the blocking block 224, thereby increasing the space for storing the lubricating oil in the oil inlet pipe 22, thereby reducing the oil pressure in the oil inlet pipe 22.

[0044] In order to prevent the oil inlet pipe 22 from moving in the first installation cavity 211 due to the thrust of the lubricating oil on the oil inlet pipe 22 when the oil pressure in the oil inlet pipe 22 increases, the following features are specifically provided:

[0045] At least two guide blocks 28 are arranged in the reversing seat 21, and the oil inlet pipe 22 and the oil outlet pipe 23 are inserted in the guide blocks 28; the outer walls of the oil inlet pipe 22 and the oil outlet pipe 23 are provided with a surrounding annular groove 226, and the guide block 28 is provided with an annular clamping strip 281 (such as Fig.12 as shown).

[0046] The oil inlet pipe 22 and the oil outlet pipe 23 in this embodiment are inserted into the guide block 28 provided in the reversing seat 21 to keep the axes of the oil inlet pipe 22 and the oil outlet pipe 23 in the same straight line with the axes of the first mounting cavity 211 and the second mounting cavity 212, respectively, and the annular clamping strip 281 on the guide block 28 is clamped in the annular clamping groove 226 on the outer wall of the oil inlet pipe 22 and the oil outlet pipe 23, thereby preventing the oil inlet pipe 22 and the oil outlet pipe 23 from moving along their own axis direction due to external force.

[0047] In order to solve the problem of how to simultaneously control the oil inlet pipe 22 and the oil outlet pipe 23 to rotate, the following features are specifically set:

[0048] The driving unit 27 includes a meshing gear 271 coaxially installed on the outside of the oil inlet pipe 22 and the oil outlet pipe 23, and the meshing gears 271 on the oil inlet pipe 22 and the oil outlet pipe 23 are meshingly connected; the driving unit 27 also includes a turntable 272 coaxially installed on the end of the oil inlet pipe 22 away from the second installation cavity 212, and a locking unit 29 is provided at the end of the reversing seat 21 close to the turntable 272 for locking the rotation state of the turntable 272 and the position of the pressure relief valve core 26 in the blocking block 224.

[0049] In this embodiment, meshing gears 271 are installed on the outside of the oil inlet pipe 22 and the oil outlet pipe 23. The two meshing gears 271 are meshed and connected. Therefore, when the staff rotates the turntable 272 at one end of the oil inlet pipe 22, the oil outlet pipe 23 can be driven to rotate in the opposite direction synchronously. The connecting pipe 221 on the oil inlet pipe 22 and the oil outlet pipe 23 is located on the outside and moves in the opposite direction without collision. When the oil inlet pipe 22 and the oil outlet pipe 23 are rotated to adjust the position of the connecting pipe 221, the locking unit 29 can lock the turntable 272, thereby realizing the angle locking of the oil inlet pipe 22 and the oil outlet pipe 23.

[0050] In order to achieve the purpose that the locking unit 29 can simultaneously lock the rotation state of the rotating disk 272 and the position of the pressure relief valve core 26 in the blocking block 224, the following features are specifically set:

[0051] The locking unit 29 includes a movable seat 291, on which two top posts 292 (such as Fig. 9 As shown in the figure, the axis of the top column 292 is in the same straight line as the axis of the oil inlet pipe 22 and the oil outlet pipe 23, respectively. A guide hole 228 is provided at the axis of the blocking block 224 that blocks the oil inlet pipe 22 and the oil outlet pipe 23. The top column 292 passes through the guide hole 228 and extends to the pressure relief chamber 222 to fit the pressure relief valve core 26; the circumferential side of the rotating disk 272 is provided with two side slots 273 symmetrical about the center of the circle, and the connecting line of the side slots 273 is perpendicular to the axis of the connecting pipe 221 (as shown in the figure). Fig.11 and Fig.12 As shown in the figure, the movable seat 291 is provided with an insert block 293 having the same cross-sectional shape and size as the side slot 273. When the movable seat 291 is fitted with the reversing seat 21, the insert block 293 is inserted into the side slot 273 on the turntable 272 near one end of the movable seat 291.

[0052] Side sliding grooves 294 are provided on both sides of the movable seat 291, and positioning blocks 295 are slidably installed in the side sliding grooves 294. A plurality of second springs 296 are provided in the side sliding grooves 294. The second springs 296 are elastically connected to the positioning blocks 295. The elastic force of the second springs 296 causes the positioning blocks 295 to move to the outside of the movable seat 291 and protrude from the side wall of the movable seat 291; the locking unit 29 also includes two fixed blocks 297 fixedly installed on the outside of the reversing seat 21, and a positioning socket 298 is provided on the side of the fixed block 297 that is in contact with the movable seat 291, and the positioning block 295 is inserted in the positioning socket 298 to fix the position of the movable seat 291.

[0053] The locking unit 29 in this embodiment is located on one side of the turntable 272. The turntable 272 is provided with two side slots 273 symmetrically centered on the circle. The insert block 293 provided on the movable seat 291 of the locking unit 29 can be inserted into the side slot 273 to limit the rotation of the turntable 272. When the turntable 272 rotates 180 degrees, the connecting pipe 221 on the oil inlet pipe 22 and the oil outlet pipe 23 is just moved from the auxiliary oil outlet 215 and the auxiliary oil inlet 216 on one side to the auxiliary oil outlet 215 and the auxiliary oil inlet 216 on the other side. The closing cover 223 on the connecting pipe 221 fits the limit strip 218 to show the rotation of the oil inlet pipe 22 and the oil outlet pipe 23, and also facilitates the alignment of the side slot 273 with the insert block 293 on the movable seat 291. When the insert block 293 is inserted into the side slot 273 of the turntable 272, the movable seat 291 fits on the reversing seat 21 At this time, the top column 292 on the movable seat 291 passes through the guide hole 228 of the blocking block 224 and enters the pressure relief chamber 222, and abuts the pressure relief valve core 26, restricting the pressure relief valve core 26 from approaching the blocking block 224, thereby ensuring that during normal operation, the pressure relief valve core 26 is fixed in the oil inlet pipe 22, maintaining the volume of the oil inlet pipe 22 for the flow of lubricating oil, and ensuring that the lubricating oil flows to the connecting pipe 221. When it is necessary to rotate the oil inlet pipe 22 and the oil outlet pipe 23, the staff can move the movable seat 291 along the axial direction of the top column 292. During the movement of the movable seat 291, the plug block 293 disengages from the side slot 273 of the turntable 272, so that the turntable 272 can rotate to drive the oil inlet pipe 22 and the oil outlet pipe 23 to rotate. At the same time, the top column 292 also disengages from the pressure relief valve core 26, which facilitates the pressure relief valve core 26 to relieve the pressure in the oil inlet pipe 22. When the oil inlet pipe 22 rotates one hundred and eighty degrees, the movable seat 291 is reset. At this time, the positioning blocks 295 on both sides of the movable seat 291 are inserted into the positioning holes 298 of the fixed block 297 under the elastic force of the second spring 296 in the side slide groove 294, limiting the movement of the movable seat 291 in the axial direction of the top column 292, thereby locking the position of the movable seat 291. The turntable 272 cannot rotate because the blocks 293 are inserted in the side slots 273, thereby maintaining the stable operation of the oil filter device 2.

[0054] In order to solve the problem of how to prevent the top column 292 from being separated from the pressure relief chamber 222 when the movable seat 291 moves, the following features are specifically provided:

[0055] A limiting head 299 is coaxially arranged at one end of the top column 292 located inside the blocking block 224 , and the outer diameter of the limiting head 299 is larger than the diameters of the top column 292 and the guide hole 228 .

[0056] In this embodiment, a thread can be set on the top column 292, and the limit head 299 can be a nut. The limit head 299 is located in the pressure relief chamber 222 and cannot pass through the first spring 225 on the blocking block 224, so as to keep one end of the top column 292 always located in the pressure relief chamber 222 to prevent the moving seat 291 from separating from the reversing seat 21.

[0057] In order to solve the problem of how to keep the meshing connection state of the meshing gears 271 on the oil inlet pipe 22 and the oil outlet pipe 23 stable during rotation, the following features are specifically set:

[0058] A surrounding limiting ring 227 is arranged outside the oil inlet pipe 22 and the oil outlet pipe 23 , and the meshing gear 271 is installed in the limiting ring 227 .

[0059] The meshing gear 271 in this embodiment is installed in the limiting ring 227 outside the oil inlet pipe 22 and the oil outlet pipe 23. The limiting ring 227 limits the movement of the meshing gear 271 along the axial direction to maintain the stability of the meshing connection state of the two meshing gears 271.

[0060] In order to solve the problem of how to conveniently rotate the turntable 272, the following features are specifically set:

[0061] A handle 274 is provided on the turntable 272 , and the handle 274 is located on one side of the axis of the turntable 272 .

[0062] In this embodiment, the staff can hold the handle 274 on the turntable 272 to drive the turntable 272 to rotate. The handle 274 is located on one side of the axis of the turntable 272 to avoid contact with the top column 292 during the rotation.

[0063] Working principle: The oil supply device transports the lubricating oil in the oil tank 1 to various components of the air compressor through the oil pump 11, and the oil filter device 2 is connected to the lubricating oil flowing into the cooler 12, and filters the impurities and debris contained therein. The lubricating oil cooled by the cooler 12 flows back to the oil tank 1 for recycling. The coolant with impurities enters the oil inlet pipe 22 from the main oil inlet port 213 on the reversing seat 21, and enters the auxiliary oil outlet port 215 on one side of the reversing seat 21 through the connecting pipe 221 of the oil inlet pipe 22, and then enters the input end of the main oil filter 24 connected to the auxiliary oil outlet port 215. The main oil filter 24 filters the impurities in the lubricating oil, and the filtered lubricating oil is discharged from the output of the main oil filter 24. The oil end enters the secondary oil inlet 216 on one side of the reversing seat 21, and then enters the connecting pipe 221 of the oil outlet pipe 23 connected to the secondary oil inlet 216. When replacing the filter element in the main oil filter 24, the staff rotates the oil inlet pipe 22 and the oil outlet pipe 23 in the reversing seat 21 through the driving unit 27. At this time, the pressure relief valve core 26 relieves the oil pressure of the oil inlet pipe 22, and the connecting pipe 221 on the oil inlet pipe 22 and the oil outlet pipe 23 rotates to the secondary oil outlet 215 and the secondary oil inlet 216 on the other side of the reversing seat 21 connected to the secondary oil filter 25. The lubricating oil with impurities enters the secondary oil filter 25 for filtration, and the staff can replace the filter element in the main oil filter 24 without stopping the machine.

Claims

1. An oil supply device for an air compressor, comprising an oil tank (1) mounted on the air compressor, an oil pump (11), an oil filter device (2) and a cooler (12), characterized in that: The oil filter device (2) comprises a reversing seat (21), wherein a first installation cavity (211) and a second installation cavity (212) are arranged in the reversing seat (21), wherein the axes of the first installation cavity (211) and the second installation cavity (212) are parallel, an oil inlet pipe (22) is coaxially arranged at one end of the first installation cavity (211), the oil inlet pipe (22) is connected to a main oil inlet port (213) arranged on the first installation cavity (211), and an oil outlet pipe (23) is coaxially arranged at one end of the second installation cavity (212), the oil outlet pipe (23) is connected to a main oil outlet port (214) at one end of the second installation cavity (212); Auxiliary oil outlets (215) extending radially along the first installation cavity (211) are arranged on both sides of the first installation cavity (211); auxiliary oil inlets (216) extending radially along the second installation cavity (212) are arranged on both sides of the second installation cavity (212); the oil filter device (2) further comprises a main oil filter (24) and an auxiliary oil filter (25); the main oil filter (24) and the auxiliary oil filter (25) are respectively connected to the auxiliary oil outlet (215) and the auxiliary oil inlet (216) located on the same side of the reversing seat (21); The oil inlet pipe (22) and the oil outlet pipe (23) are both provided with a connecting pipe (221) extending radially along their own axes. The reversing seat (21) is provided with a driving unit (27) for driving the oil inlet pipe (22) and the oil outlet pipe (23) to rotate around their own axes. The driving unit (27) enables the connecting pipes (221) of the oil inlet pipe (22) and the oil outlet pipe (23) to respectively connect to different auxiliary oil outlets (215) and auxiliary oil inlets (216). A pressure relief chamber (222) is provided at one end of the oil inlet pipe (22) and the oil outlet pipe (23) away from the main oil inlet port (213) and the main oil outlet port (214), and a pressure relief valve core (26) is provided in the pressure relief chamber (222) for reducing the oil pressure in the oil inlet pipe (22) and the oil outlet pipe (23); A closing cover (223) is installed on the connecting pipe (221) of the oil inlet pipe (22) and the oil outlet pipe (23); the curvature of the opening side of the closing cover (223) is the same as the curvature of the first installation cavity (211) and the second installation cavity (212); and the opening side of the closing cover (223) fits the inner wall of the reversing seat (21); The first installation cavity (211) and the second installation cavity (212) of the reversing seat (21) are both provided with a limiting ring rail (217) surrounding the inner wall thereof, the closing cover (223) is located in the limiting ring rail (217) for limited movement, and the outer wall of the closing cover (223) fits the inner wall of the limiting ring rail (217); The reversing seat (21) is provided with a limit strip (218) at the connection between the first installation cavity (211) and the second installation cavity (212), the limit strip (218) extending along the axis of the reversing seat (21), and when one side of the closing cover (223) is in contact with the limit strip (218), the auxiliary oil outlet (215) of the first installation cavity (211) and the auxiliary oil inlet (216) of the second installation cavity (212) are located in the opening of the closing cover (223); A blocking block (224) for blocking the pressure relief chamber (222) is arranged in the oil inlet pipe (22) and the oil outlet pipe (23); a first spring (225) is arranged in the pressure relief chamber (222); the first spring (225) elastically connects the pressure relief valve core (26) and the blocking block (224); the elastic force of the first spring (225) causes the pressure relief valve core (26) to move away from one side of the blocking block (224).

2. The air compressor oil supply device according to claim 1, characterized in that: At least two guide blocks (28) are arranged in the reversing seat (21), and the oil inlet pipe (22) and the oil outlet pipe (23) are inserted into the guide blocks (28); The outer walls of the oil inlet pipe (22) and the oil outlet pipe (23) are provided with surrounding annular clamping grooves (226), and the guide block (28) is provided with an annular clamping strip (281) inserted into the annular clamping grooves (226).

3. The oil supply device for an air compressor according to claim 1, characterized in that: The driving unit (27) comprises a meshing gear (271) coaxially mounted on the outside of the oil inlet pipe (22) and the oil outlet pipe (23), and the meshing gear (271) on the oil inlet pipe (22) and the oil outlet pipe (23) are meshingly connected; The drive unit (27) further comprises a rotating disk (272) coaxially mounted on an end of the oil inlet pipe (22) away from the second mounting chamber (212); and a locking unit (29) for locking the rotation state of the rotating disk (272) and the position of the pressure relief valve core (26) in the blocking block (224) is provided on an end of the reversing seat (21) close to the rotating disk (272).

4. The oil supply device for an air compressor according to claim 3, characterized in that: The locking unit (29) comprises a movable seat (291), on which two top columns (292) are arranged, the axes of the top columns (292) being respectively on the same straight line as the axes of the oil inlet pipe (22) and the oil outlet pipe (23), a guide hole (228) being arranged at the axis of a blocking block (224) for blocking the oil inlet pipe (22) and the oil outlet pipe (23), and the top columns (292) passing through the guide holes (228) extend to the inside of the blocking block (224) to fit the pressure relief valve core (26); The rotating disk (272) is provided with two side slots (273) symmetrical about the center of the circle on the circumference thereof, the connecting line of the side slots (273) being perpendicular to the axis of the connecting pipe (221), the meshing gear (271) is provided with an insert block (293) having the same cross-sectional shape and size as the side slots (273), and when the meshing gear (271) is fitted with the reversing seat (21), the insert block (293) is inserted into the side slot (273) on the rotating disk (272) close to one end of the moving seat (291).

5. The oil supply device for an air compressor according to claim 4, characterized in that: Side sliding grooves (294) are provided on both sides of the movable seat (291), and positioning blocks (295) are slidably installed in the side sliding grooves (294). A plurality of second springs (296) are provided in the side sliding grooves (294), and the second springs (296) are elastically connected to the positioning blocks (295). The elastic force of the second springs (296) causes the positioning blocks (295) to move outside the movable seat (291) and protrude from the side wall of the movable seat (291); The locking unit (29) further comprises two fixed blocks (297) fixedly mounted on the outside of the reversing seat (21); a positioning plug hole (298) is provided on one side of the fixed block (297) that is in contact with the movable seat (291); and the positioning plug block (295) is inserted into the positioning plug hole (298) to fix the position of the movable seat (291).

6. The oil supply device for an air compressor according to claim 5, characterized in that: A limiting head (299) is coaxially arranged at one end of the top column (292) located inside the blocking block (224); the outer diameter of the limiting head (299) is larger than the diameters of the top column (292) and the guide hole (228).

7. The oil supply device for an air compressor according to claim 3, characterized in that: A surrounding limiting ring (227) is arranged outside the oil inlet pipe (22) and the oil outlet pipe (23), and the meshing gear (271) is installed inside the limiting ring (227).

8. The oil supply device for an air compressor according to claim 3, characterized in that: A handle (274) is provided on the rotating disk (272), and the handle (274) is located on one side of the axis of the rotating disk (272).

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