Self-oscillation cleaning kettle and cleaning system for mechanical parts

Abstract

The mechanical part self-oscillation cleaning kettle comprises a bracket, a kettle cover, a kettle body, a workbench, a self-oscillation pulse jet flow assembly and a driving assembly, the kettle cover is horizontally arranged on the bracket in a sliding mode, the kettle cover movably abuts against the kettle body and is connected with the kettle body in a sealed mode, and one end of the workbench is rotationally connected with the inner side of the kettle cover through a bearing; the self-oscillation pulse jet assembly is arranged on the top of the inner side of the kettle body, and the driving assembly penetrates through the bottom of the outer side of the kettle body to be connected to the conical positioning block and drives the conical positioning block to drive the workbench to rotate. By adopting the quick-open kettle cover structure, the loading and unloading problems of long, thin and large workpieces are solved, and the operation efficiency of cleaning the kettle is improved; a low-pressure large-flow self-oscillation pulse jet flow nozzle is adopted, the flow field speed of the nozzle can reach 650 m / s, the peak value speed is far higher than the continuous jet flow stable speed, and the problem of high energy consumption of ultrahigh-pressure continuous jet flow cleaning is solved; and environmental pollution cannot be caused.

Description

Technical Field

[0001] The invention belongs to the technical field of workpiece cleaning, and in particular relates to a self-excited oscillation cleaning kettle and a cleaning system for mechanical parts. Background Art

[0002] Industrial cleaning is an essential part of mechanical processing production. At present, industrial cleaning mainly adopts aqueous solution or organic solution for cleaning. Aqueous solution cleaning requires complex formula of cleaning reagents, surfactants, etc. The workpieces after treatment are prone to rust, and the cleaning agent causes secondary pollution; organic solvents are mainly volatile solvents or halogen solvents, which cause the destruction of the ozone layer and cause serious air pollution.

[0003] In the article "Mechanism of Self-Excited Oscillating Pulse Supercritical Carbon Dioxide Jet Generation (Henan Polytechnic University, Liu Yong and others from the Provincial and Ministerial Collaborative Center for Coal Safety Production and Clean and Efficient Utilization)", a systematic analysis was conducted on the conditions for the generation of self-excited oscillating pulse supercritical carbon dioxide jets, and the difference in jet pressure under the conditions of self-excited oscillating pulse supercritical carbon dioxide jets and continuous jet conditions was compared.

[0004] Since high-pressure water jets are free jets and incompressible viscous fluids, the pressure is as high as 200MPa, and the ultra-high pressure even reaches 420MPa, so the energy consumption remains high. Compared with continuous jets, supercritical carbon dioxide (SC-CO2) self-excited oscillation jet technology has higher pulse pressure and resonance crushing effect. The peak pressure of self-excited oscillation pulse water jets is 2.5 times that of continuous water jets, and the highest peak pressure of SC-CO2 self-excited oscillation jets is 7.85 times that of water jets.

[0005] Therefore, designing a special cleaning kettle and cleaning system for cleaning mechanical parts on this basis can effectively improve the cleaning efficiency and reduce pollution to the environment. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a self-excited oscillation cleaning kettle and a cleaning system for mechanical parts in view of the deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A self-excited oscillation cleaning kettle for mechanical parts, comprising a bracket, a kettle cover, a kettle body, a workbench, a self-excited oscillation pulse jet component and a driving component. The kettle cover is horizontally slidably arranged on the bracket, the kettle cover can be moved to the kettle body and sealedly connected thereto, one end of the workbench is rotatably connected to the inner side of the kettle cover through a bearing, and the other end is pressed against the inner bottom of the kettle body through a conical positioning block, the self-excited oscillation pulse jet component is arranged on the inner top of the kettle body, and the driving component passes through the outer bottom of the kettle body and is connected to the conical positioning block and drives it to drive the workbench to rotate.

[0009] In order to better realize the present invention, further optimization is made in the above structure. The self-excited oscillation pulse jet component includes a main pipe, a hydraulic cylinder and a bracket. A plurality of nozzles are arranged at the bottom of the main pipe. The bracket is a movable four-link structure. The upper and lower fulcrums of the bracket are respectively connected to the inner top of the kettle body and the top of the main pipe, and the left and right fulcrums of the bracket are respectively connected to the two ends of the hydraulic cylinder.

[0010] In order to better realize the present invention, further optimization is made in the above structure. The upper channel, the oscillation chamber and the lower channel are connected in sequence on the nozzle. The ratio of the diameter of the lower channel to the diameter of the upper channel is in the range of 2.0-2.2, the ratio of the diameter of the oscillation chamber to the diameter of the lower channel is in the range of 7.0-8.0, the ratio of the length L of the oscillation chamber to the diameter of the oscillation chamber is in the range of 0.4-0.7, and the collision wall angle α at the bottom of the oscillation chamber is 120°.

[0011] In order to better realize the present invention, further optimization is made in the above structure, which also includes a clamp and a loading and unloading joint. The clamp is arranged at the center of the inner side of the kettle cover, the front end of the clamp is a U-shaped groove, and the rear end is a triangular groove. The loading and unloading joint is arranged at the end of the workbench through a bearing, and the end of the loading and unloading joint is a triangular structure, and the end of the loading and unloading joint passes through the U-shaped groove and reaches the triangular groove.

[0012] In order to better realize the present invention, further optimization is made in the above structure, which also includes a driving disk, the driving disk includes a cylindrical barrel and an arc-shaped head arranged on the cylindrical barrel, the conical positioning block is fixedly arranged at the inner center of the arc-shaped head, the outer wall of the cylindrical barrel is rotatably connected to the inner wall of the kettle body, and the driving assembly is connected to the inner center of the arc-shaped head on the driving disk and drives it and the conical positioning block to rotate.

[0013] In order to better realize the present invention, further optimization is made in the above structure. A U-shaped track is arranged on the inner wall of the cylindrical barrel, and a loading and unloading guide roller and a loading and unloading lifting lug are arranged on the outer ring of the workbench. The loading and unloading guide roller can be inserted into the U-shaped track and slidably connected thereto.

[0014] In order to better realize the present invention, further optimization is made in the above structure, and an organic sealing mechanism is arranged between the driving assembly and the kettle body.

[0015] In order to better realize the present invention, further optimization is made in the above structure, and the driving component is a variable frequency speed regulating motor.

[0016] A cleaning system comprises a C02 storage tank, a C02 compressor, a heater, a cooler and the above-mentioned mechanical parts self-excited oscillation cleaning kettle, the outlet of the C02 storage tank is connected to the inlet of the C02 compressor through a V1 valve, the outlet of the C02 compressor is connected to the inlet of the heater through a V3 valve, the outlet of the heater is connected to a main pipe, the inlet of the cooler is connected to the kettle body, the outlet of the cooler is connected to the inlet of the C02 storage tank through a V5 valve, the outlet of the C02 compressor is also connected to the inlet of the C02 storage tank through a V4 valve, and the outlet of the cooler is also connected to the inlet of the C02 compressor through a V2 valve.

[0017] In order to better realize the present invention, further optimization is made in the above structure, a heat exchange component is arranged between the heater and the cooler, and the heat exchange component includes a refrigerant compressor and an expansion valve arranged in parallel between the heater and the cooler.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The self-excited oscillation cleaning kettle and cleaning system for mechanical parts provided by the present invention adopt a quick-opening kettle cover structure, which solves the problem of loading and unloading long, thin and large workpieces and improves the operating efficiency of the cleaning kettle; and adopts a low-pressure and large-flow self-excited oscillation pulse jet nozzle, the nozzle flow field speed can reach 650m / s, and the peak speed far exceeds the continuous jet stable speed, which solves the problem of high energy consumption of ultra-high pressure continuous jet cleaning; carbon dioxide is used as a solvent and reaction medium, and compared with water, it can clean workpieces with complex geometric structures, operate at room temperature, do not require additional drying time, and will not cause environmental pollution; the molecules of carbon dioxide are symmetrical in structure and have very low polarity. According to the principle of like dissolves like, it can dissolve non-polar or low-polar organic matter that water cannot dissolve, and can be used as a solvent for organic reactions to dissolve fat-soluble reactants and products therein while maintaining the homogeneity of the reaction; co-solvents can also be added to carbon dioxide to increase the solubility of solutes (workpiece surface dirt) in carbon dioxide, or co-solvents can be added in a targeted manner to solve the problem of workpieces that cannot be treated by single carbon dioxide, and solve the problem of single use of water-based solvents in a single scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view of the cleaning kettle in the present invention;

[0022] Figure 2is a top view of the cleaning kettle in the present invention;

[0023] Figure 3 yes Figure 2 Sectional view of AA in the middle;

[0024] Figure 4 It is a structural schematic diagram of the workbench in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the self-excited oscillation pulse jet component in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the nozzle in the present invention;

[0027] Figure 7 Schematic diagram of the cleaning system of the present invention.

[0028] In the figure:

[0029] 1- bracket, 2- kettle cover, 3- kettle body, 4- workbench, 401- loading and unloading guide roller, 402- loading and unloading lifting ear, 5- self-excited oscillation pulse jet assembly, 501- main pipe, 502- hydraulic cylinder, 503- bracket, 504- nozzle, 5041- upper channel, 5042- oscillation chamber, 5043- lower channel, 6- driving assembly, 7- bearing, 8- conical positioning block, 9- clamp, 10- loading and unloading joint, 11- driving plate, 1101- cylindrical cylinder, 1102- arc head, 12- machine sealing mechanism, 20- C02 storage tank, 30- C02 compressor, 40- heater, 50- cleaning kettle, 60- cooler, 70- refrigerant compressor, 80- expansion valve, V1, V2, V3, V4, V5- valve. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] Reference Figure 1-6 , which is a schematic diagram of the structure of the self-excited oscillation cleaning kettle for mechanical parts of the present application, includes a bracket 1, a kettle cover 2, a kettle body 3, a workbench 4, a self-excited oscillation pulse jet component 5 and a drive component 6. The drive component 6 is used as a power source and a variable frequency speed regulating motor is selected.

[0035] The kettle cover 2 is horizontally slidably arranged on the bracket 1, and the kettle cover 2 can be moved to the kettle body 3 and sealed therewith. Figure 1 and Figure 2 As shown, the bracket 1 includes a support and two sliding rods horizontally arranged on the support, and the kettle cover 2 is connected to the two sliding rods for sliding connection therewith. During operation, the kettle cover 2 and the kettle body 3 form a closed space, and when loading and unloading the workpiece table 4, the workpiece table 4 can be pulled to move horizontally. The workpiece table 4 is a hollow circular or polygonal cylinder. If there is no special requirement, a cylindrical shape is preferred, because the cylindrical shape can form a stable incident angle with the jet generated by the self-excited oscillation nozzle 504.

[0036] One end of the workbench 4 is rotatably connected to the inner side of the kettle cover 2 through a bearing 7. The present application also includes a clamp 9 and a loading and unloading joint 10. The clamp 9 is arranged at the inner center of the kettle cover 2. The front end of the clamp 9 is a U-shaped groove, and the rear end is a triangular groove. The loading and unloading joint 10 is arranged at the end of the workbench 4 through the bearing 7. The end of the loading and unloading joint 10 is a triangular structure. The end of the loading and unloading joint 10 passes through the U-shaped groove and reaches the triangular groove. The main function of the clamp 9 is to provide positioning and traction for the workbench 4.

[0037] The other end of the workbench 4 is against the inner bottom of the kettle body 3 through the conical positioning block 8. The conical positioning block 8 provides a self-positioning center point for the workbench 4. The conical positioning block 8 selects the appropriate parameters in GB / T2203-91 "Fixed positioning pins for machine tool fixture parts and components" according to the diameter of the workbench 4. The driving component 6 passes through the outer bottom of the kettle body 3 and is connected to the conical positioning block 8 and drives it to drive the workbench 4 to rotate. A mechanical seal mechanism 12 is set between the driving component 6 and the kettle body 3. The mechanical seal mechanism 12 is a double-end mechanical seal installed on the transmission shaft of the moving component 6, withstands the pressure in the kettle body 3, reduces the friction and loss between the transmission shaft of the moving component 6 and the kettle body 3, and improves the efficiency of the equipment. The present application also includes a driving disk 11, which includes a cylindrical body 1101 and an arc-shaped head 1102 welded on the cylindrical body 1101, a conical positioning block 8 fixedly arranged at the inner center of the arc-shaped head 1102, a circumferentially rotating roller is arranged on the outer wall of the cylindrical body 1101, and is rotatably connected to the inner wall of the kettle body 3, and 4-8 groups of rollers are arranged according to the diameter of the equipment to maintain the balance stability during rotation, and the driving component 6 is connected to the inner center of the arc-shaped head 1102 on the driving disk 11 and drives it and the conical positioning block 8 to rotate.

[0038] The inner wall of the cylindrical barrel 1101 is provided with a U-shaped track, arranged horizontally at 180°. The outer ring of the workbench 4 is provided with a loading and unloading guide roller 401 and a loading and unloading lifting lug 402. The loading and unloading guide roller 401 can be inserted into the U-shaped track and slidably connected therewith, and is used to guide the workbench 4 for loading and unloading, and at the same time transmit the rotational torque of the drive disk 11 to the workbench 4. The inner wall of the kettle body 3 is also provided with a loading and unloading track, arranged horizontally at 180°, and is used for loading and unloading and moving the loading and unloading guide roller 401. The loading and unloading lifting lug 402 uses type B in GB / T 35981-2018 "Technical Specifications for Welding Lifting Lugs for Metallurgical Equipment". The external dimensions are selected according to the weight of the workbench 4 and the weight of the workpiece, and the appropriate parameters are selected in specification table 3.

[0039] The self-excited oscillation pulse jet assembly 5 is arranged at the top of the inner side of the kettle body 3. The self-excited oscillation pulse jet assembly 5 includes a main pipe 501, a hydraulic cylinder 502 and a bracket 503. The main pipe 501 is made of seamless steel pipe, and its length is determined according to the number of nozzles 504. A plurality of nozzles 504 are arranged at the bottom of the main pipe 501. When the main pipe 501 is installed, it is necessary to ensure that the incident angle of the self-excited oscillation nozzle 504 is within the range of 20°-45°. The bracket 503 is a movable four-link structure. The upper and lower fulcrums of the bracket 503 are respectively connected to the inner top of the kettle body 3 and the top of the main pipe 501. The main pipe 501 is fixed to the lower node of the nozzle bracket 503 in the vertical direction by a clamp with a lifting ear. The left and right fulcrums of the bracket 503 are respectively connected to the two ends of the hydraulic cylinder 502. The hydraulic cylinder 502 and the bracket 503 are arranged in two groups to improve the stability of the main pipe 501 when it is lifted and lowered. At the same time, the hydraulic oil circuit of the hydraulic cylinder 502 is installed in series to ensure that the push rod strokes of the two hydraulic cylinders 502 are consistent. The extension and retraction of the hydraulic cylinder 502 drives the bracket 503 to move up and down, and the self-excited oscillation pulse jet cleaning system can dynamically adjust the target distance, and can adapt to rust removal or surface cleaning of columnar workpieces with different diameters.

[0040] The nozzle 504 is connected to an upper channel 5041, an oscillation chamber 5042 and a lower channel 5043 in sequence, the ratio of the diameter of the lower channel 5043 to the diameter of the upper channel 5041 is in the range of 2.0-2.2, the ratio of the diameter of the oscillation chamber 5042 to the diameter of the lower channel 5043 is in the range of 7.0-8.0, the ratio of the length L of the oscillation chamber 5042 to the diameter of the oscillation chamber 5042 is in the range of 0.4-0.7, and the collision wall angle α at the bottom of the oscillation chamber 5042 is 120°.

[0041] Embodiment 2:

[0042] Figure 7 The schematic diagram of the cleaning system provided in the present application includes a C02 storage tank 20, a C02 compressor 30, a heater 40, a cooler 50 and the above-mentioned mechanical parts self-excited oscillation cleaning kettle, the outlet of the C02 storage tank 20 is connected to the inlet of the C02 compressor 30 through the V1 valve, the outlet of the C02 compressor 30 is connected to the inlet of the heater 40 through the V3 valve, the outlet of the heater 40 is connected to the main pipe 501, the inlet of the cooler 50 is connected to the kettle body 3, the outlet of the cooler 50 is connected to the inlet of the C02 storage tank 20 through the V5 valve, the outlet of the C02 compressor 30 is also connected to the inlet of the C02 storage tank 20 through the V4 valve, and the outlet of the cooler 50 is also connected to the inlet of the C02 compressor 30 through the V2 valve.

[0043] A heat exchange component is disposed between the heater 40 and the cooler 50 , and the heat exchange component includes a refrigerant compressor 70 and an expansion valve 80 disposed in parallel between the heater 40 and the cooler 50 .

[0044] Its working principle is:

[0045] In the normal operation state (cleaning kettle 50 is washing), valves V1, V3, and V5 are in the open state, and valves V2 and V4 are in the closed state. After the low-pressure carbon dioxide in the CO2 storage tank 20 is pressurized by the CO2 compressor 30, the high-pressure carbon dioxide is heated to the temperature set by the process by the heater 40, enters the pulse jet generator in the cleaning kettle 50, and is ejected from the nozzle 504. The high-pressure carbon dioxide is decompressed and vaporized in the cleaning kettle 50, separated from the impurities washed off the surface of the workpiece, and then enters the cooler 60, where it is cooled and liquefied, and the liquid carbon dioxide returns to the CO2 storage tank 20 for recycling. Heater 40, cooler 60, refrigerant compressor 70, expansion valve 80 form a heat exchange system. The refrigerant (refrigerant) in the system is compressed into a high-pressure liquid by refrigerant compressor 70. The high temperature generated by compression is indirectly exchanged with carbon dioxide in heater 40. The pressure of the cooled refrigerant is reduced under the flow limiting effect of expansion valve 80. The refrigerant vaporizes in cooler 60. When vaporizing, it absorbs the heat of carbon dioxide discharged from cleaning kettle 50 and enters refrigerant compressor 70. In this way, heat balance is achieved in the cycle, and no additional heat source is required. The temperature of carbon dioxide can be controlled. The operating speed of refrigerant compressor 70 and the opening of expansion valve 80 can be adjusted to control the working temperature of heater 40. After cleaning kettle 50 completes the washing task, valves V1, V3, and V5 are closed, valves V2 and V4 are opened, and CO2 compressor 30 is used to evacuate cleaning kettle 50 to recover all carbon dioxide in the system into CO2 storage tank 20.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A self-excited oscillation cleaning kettle for mechanical parts, characterized in that: The invention comprises a bracket (1), a kettle cover (2), a kettle body (3), a workbench (4), a self-excited oscillation pulse jet component (5) and a driving component (6); the kettle cover (2) is horizontally slidably arranged on the bracket (1); the kettle cover (2) can be moved to abut against the kettle body (3) and be sealed therewith; one end of the workbench (4) is rotatably connected to the inner side of the kettle cover (2) through a bearing (7); the other end abuts against the inner bottom of the kettle body (3) through a conical positioning block (8); the self-excited oscillation pulse jet component (5) is arranged on the inner top of the kettle body (3); the driving component (6) passes through the outer bottom of the kettle body (3) and is connected to the conical positioning block (8) and drives the workbench (4) to rotate.

2. A self-excited oscillation cleaning kettle for mechanical parts according to claim 1, characterized in that: The self-excited oscillation pulse jet component (5) comprises a main pipe (501), a hydraulic cylinder (502) and a bracket (503); a plurality of nozzles (504) are arranged at the bottom of the main pipe (501); the bracket (503) is a movable four-link structure; the upper and lower supporting points of the bracket (503) are respectively connected to the inner top of the kettle body (3) and the top of the main pipe (501); the left and right supporting points of the bracket (503) are respectively connected to the two ends of the hydraulic cylinder (502).

3. A self-excited oscillation cleaning kettle for mechanical parts according to claim 2, characterized in that: The nozzle (504) is connected to an upper channel (5041), an oscillation chamber (5042) and a lower channel (5043) in sequence, the ratio of the diameter of the lower channel (5043) to the diameter of the upper channel (5041) is in the range of 2.0-2.2, the ratio of the diameter of the oscillation chamber (5042) to the diameter of the lower channel (5043) is in the range of 7.0-8.0, the ratio of the length of the oscillation chamber (5042) to the diameter of the oscillation chamber (5042) is in the range of 0.4-0.7, and the collision wall angle at the bottom of the oscillation chamber (5042) is 120°.

4. The self-excited oscillation cleaning kettle for mechanical parts according to claim 1, characterized in that: It also includes a clamp (9) and a loading and unloading joint (10), wherein the clamp (9) is arranged at the inner center of the kettle cover (2), the front end of the clamp (9) is a U-shaped groove, and the rear end is a triangular groove, the loading and unloading joint (10) is arranged at the end of the workbench (4) through the bearing (7), the end of the loading and unloading joint (10) is a triangular structure, and the end of the loading and unloading joint (10) passes through the U-shaped groove and reaches the inside of the triangular groove.

5. The self-excited oscillation cleaning kettle for mechanical parts according to claim 1, characterized in that: The invention also comprises a driving disk (11), wherein the driving disk (11) comprises a cylindrical body (1101) and an arc-shaped head (1102) arranged on the cylindrical body (1101), the conical positioning block (8) is fixedly arranged at the inner center of the arc-shaped head (1102), the outer wall of the cylindrical body (1101) is rotatably connected to the inner wall of the kettle body (3), and the driving component (6) is connected to the inner center of the arc-shaped head (1102) on the driving disk (11) and drives it and the conical positioning block (8) to rotate.

6. A self-excited oscillation cleaning kettle for mechanical parts according to claim 5, characterized in that: A U-shaped track is arranged on the inner wall of the cylindrical barrel (1101), and a loading and unloading guide roller (401) and a loading and unloading lifting lug (402) are arranged on the outer ring of the workbench (4), and the loading and unloading guide roller (401) can be inserted into the U-shaped track and slidably connected thereto.

7. A self-excited oscillation cleaning kettle for mechanical parts according to claim 6, characterized in that: A sealing mechanism (12) is provided between the driving assembly (6) and the kettle body (3).

8. The self-excited oscillation cleaning kettle for mechanical parts according to claim 1, characterized in that: The driving component (6) is a variable frequency speed regulating motor.

9. A cleaning system, characterized in that: The invention comprises a CO2 storage tank (20), a CO2 compressor (30), a heater (40), a cooler (50) and a self-excited oscillation cleaning kettle for mechanical parts as described in any one of claims 1 to 8, wherein the outlet of the CO2 storage tank (20) is connected to the inlet of the CO2 compressor (30) through a V1 valve, the outlet of the CO2 compressor (30) is connected to the inlet of the heater (40) through a V3 valve, the outlet of the heater (40) is connected to the main pipe (501), the inlet of the cooler (50) is connected to the inside of the kettle body (3), the outlet of the cooler (50) is connected to the inlet of the CO2 storage tank (20) through a V5 valve, the outlet of the CO2 compressor (30) is also connected to the inlet of the CO2 storage tank (20) through a V4 valve, and the outlet of the cooler (50) is also connected to the inlet of the CO2 compressor (30) through a V2 valve.

10. A cleaning system according to claim 9, characterized in that: A heat exchange component is provided between the heater (40) and the cooler (50), and the heat exchange component comprises a refrigerant compressor (70) and an expansion valve (80) which are provided in parallel between the heater (40) and the cooler (50).

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