CN114634739A - Preparation method of coating of male and female rotors of screw compressor - Google Patents
Preparation method of coating of male and female rotors of screw compressor Download PDFInfo
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- CN114634739A CN114634739A CN202210428094.7A CN202210428094A CN114634739A CN 114634739 A CN114634739 A CN 114634739A CN 202210428094 A CN202210428094 A CN 202210428094A CN 114634739 A CN114634739 A CN 114634739A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000000576 coating method Methods 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 34
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 24
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 24
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 24
- 239000003085 diluting agent Substances 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 16
- 239000010439 graphite Substances 0.000 claims abstract description 16
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims description 73
- 238000001035 drying Methods 0.000 claims description 60
- 239000000843 powder Substances 0.000 claims description 40
- 238000005245 sintering Methods 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 30
- 238000004140 cleaning Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 238000012216 screening Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 18
- 239000010687 lubricating oil Substances 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 abstract description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
- B05D7/534—Base coat plus clear coat type the first layer being let to dry at least partially before applying the second layer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a preparation method of a coating of a male rotor and a female rotor of a screw compressor, wherein the coating comprises 40-50 parts of polytetrafluoroethylene, 15-20 parts of polytetrafluoroethylene, 10-15 parts of graphite, 10-15 parts of polytetrafluoroethylene, 5-10 parts of an adhesion agent, 8-12 parts of a leveling agent and 20-30 parts of a diluent. According to the invention, through the matched use of tetrafluoroethylene, molybdenum disulfide, silicon carbide, graphite, an adhesion agent, a leveling agent and a diluent, the wear-resistant, high-temperature-resistant and self-lubricating male and female rotor coating can be prepared, so that the service life of the male and female rotor coating is longer, and the problem that the service life of the male and female rotors of the screw compressor is shorter due to the fact that the male and female rotors are easily deformed at high temperature and damaged by friction because of mutual extrusion and friction in the mutual rotating process because the existing male and female rotor coating does not have the wear-resistant, high-temperature-resistant and self-lubricating functions when in use is solved.
Description
Technical Field
The invention relates to the technical field of screw compressors, in particular to a preparation method of a coating of a male rotor and a female rotor of a screw compressor.
Background
Helical-lobe compressor, also called helical-lobe compressor, including screw air compressor and screw rod technology compressor, the screw rod machine is positive displacement double screw oil injection compressor, generally be box sled dress structure, in order to protect the negative and positive rotor of screw rod compressor, need be at negative and positive rotor surface spraying protective coating, current negative and positive rotor coating is when using, it does not possess wear-resisting, high temperature resistant and from taking lubricating function, make negative and positive rotor because mutual extrusion and friction at the in-process of rotation, the condition that high temperature deformation and friction damage very easily appear, thereby lead to screw compressor negative and positive rotor to appear the short problem of life, bring huge economic loss for the user.
Disclosure of Invention
The invention aims to provide a preparation method of a coating of a male rotor and a female rotor of a screw compressor, which has the advantages of wear resistance, high temperature resistance and self-lubricating function, and solves the problem that the service life of the male rotor and the female rotor of the screw compressor is short due to the fact that the male rotor and the female rotor are easily deformed at high temperature and damaged by friction because the male rotor and the female rotor are extruded and rubbed with each other in the mutual rotating process because the existing coating of the male rotor and the female rotor does not have the functions of wear resistance, high temperature resistance and self-lubricating function when in use.
In order to achieve the purpose, the invention provides the following technical scheme: the coating comprises 40-50 parts of polytetrafluoroethylene, 15-20 parts of polytetrafluoroethylene, 10-15 parts of graphite, 10-15 parts of polytetrafluoroethylene, 5-10 parts of an adhesion agent, 8-12 parts of a leveling agent and 20-30 parts of a diluent.
Preferably, the preparation method of the coating of the male and female rotors of the screw compressor comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying and uniformly stirring a mixture by using the dryer;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is made into powder in a powder making machine again;
d: placing the powder raw material obtained in the step C) in a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a test frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
H) the method comprises the following steps Transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine provided in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering to form a first coating on the surface of the rotor;
I) the method comprises the following steps And D) transferring the female rotor and the male rotor in the step H) to a spraying position, spraying the surfaces of the female rotor and the male rotor for the second time at a spraying speed of 10cm/s, naturally drying after spraying, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the temperature for 1H at 350 ℃, and naturally cooling the rotor to room temperature after sintering to form a second coating on the surface of the rotor.
Preferably, in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 75-80 ℃, and in the step C), the mesh number of the screen in the screening machine is 1300 meshes.
Preferably, in the steps F) and G), the organic solvent, the cleaning liquid and the clear water flow over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 75-80 ℃.
Preferably, in the step F), the meshing gap between the female rotor and the male rotor is 0.05mm-0.08mm, and in the meshing test process, the male rotor needs to rotate in a forward and reverse direction, and the number of rotation turns is greater than 20.
Preferably, the thickness of the coating after the two spraying in the step H) and the step I) is 0.03mm-0.06mm, the air pressure of the two spraying in the step H) and the step I) is 0.8MPA-1MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the matched use of tetrafluoroethylene, molybdenum disulfide, silicon carbide, graphite, an adhesion agent, a leveling agent and a diluent, the wear-resistant, high-temperature-resistant and self-lubricating male and female rotor coating can be prepared, so that the service life of the male and female rotor coating is longer, the problem that the service life of the male and female rotors of the screw compressor is shorter due to the fact that the male and female rotors are easily deformed at high temperature and damaged by friction in the mutual rotating process because the male and female rotors do not have the wear-resistant, high-temperature-resistant and self-lubricating functions when the existing male and female rotor coating is used is solved, and the screw compressor male and female rotors are worthy of popularization.
Detailed Description
A coating for a male and female rotor of a screw compressor comprises 40-50 parts of polytetrafluoroethylene, 15-20 parts of molybdenum disulfide, 10-15 parts of graphite, 10-15 parts of polytetrafluoroethylene, 5-10 parts of an adhesion agent, 8-12 parts of a leveling agent and 20-30 parts of a diluent;
a preparation method of a coating of a male rotor and a female rotor of a screw compressor comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying and uniformly stirring a mixture by using the dryer;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is made into powder in a powder making machine again;
d: placing the powder raw material obtained in the step C) into a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a test frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
H) the method comprises the following steps Transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine provided in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering to form a first coating on the surface of the rotor;
I) transferring the female rotor and the male rotor in the step H) to a spraying position, spraying the surfaces of the female rotor and the male rotor for the second time at a spraying speed of 10cm/s, naturally drying after spraying, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the temperature for 1H at 350 ℃, and naturally cooling the rotor to room temperature after sintering to form a second coating on the surface of the rotor;
in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 75-80 ℃, and in the step C), the mesh number of a screen in the screening machine is 1300 meshes;
in the steps F) and G), the organic solvent, the cleaning liquid and the clear water are all over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 75-80 ℃;
in the step F), the meshing gap between the female rotor and the male rotor is 0.05mm-0.08mm, the male rotor needs to rotate in a positive and negative rotation mode in the meshing test process, and the number of rotation turns is more than 20;
the thickness of the coating after two spraying in the step H) and the step I) is 0.03mm-0.06mm, the air pressure of the two spraying in the step H) and the step I) is 0.8MPA-1MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
The first embodiment is as follows:
a coating for a male rotor and a female rotor of a screw compressor comprises 40 parts of silicon carbide, 15 parts of polytetrafluoroethylene, 10 parts of graphite, 10 parts of polytetrafluoroethylene, 5 parts of an adhesion agent, 8 parts of a leveling agent and 20 parts of a diluent;
a preparation method of a coating of a male rotor and a female rotor of a screw compressor comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying the mixture by using the dryer and uniformly stirring;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is made into powder in a powder making machine again;
d: placing the powder raw material obtained in the step C) in a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a testing frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, then transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
H) the method comprises the following steps Transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace from room temperature to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to room temperature after the sintering to form a first coating on the surface of the rotor;
I) transferring the female rotor and the male rotor in the step H) to a spraying position, spraying the surfaces of the female rotor and the male rotor for the second time at a spraying speed of 10cm/s, naturally drying after spraying, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the temperature for 1H at 350 ℃, and naturally cooling the rotor to room temperature after sintering to form a second coating on the surface of the rotor;
in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 75 ℃, and in the step C), the mesh number of a screen in the screening machine is 1300 meshes;
in the steps F) and G), the organic solvent, the cleaning liquid and the clear water are all over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 75 ℃;
in the step F), the meshing gap between the female rotor and the male rotor is 0.05mm, the male rotor needs to rotate in a positive and negative rotation mode in the meshing test process, and the number of rotation turns is more than 20;
the thickness of the coating after two spraying in the step H) and the step I) is 0.03mm, the air pressure of the two spraying in the step H) and the step I) is 0.8MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
Example two:
a coating for male and female rotors of a screw compressor comprises 45 parts of polytetrafluoroethylene, 17 parts of polytetrafluoroethylene, 12 parts of graphite, 12 parts of polytetrafluoroethylene, 7 parts of an adhesion agent, 10 parts of a leveling agent and 25 parts of a diluent;
a preparation method of a coating of a male rotor and a female rotor of a screw compressor comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying the mixture by using the dryer and uniformly stirring;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is milled in a milling machine again;
d: placing the powder raw material obtained in the step C) in a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a testing frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, then transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
H) the method comprises the following steps Transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine provided in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering to form a first coating on the surface of the rotor;
I) transferring the female rotor and the male rotor in the step H) to a spraying position, spraying the surfaces of the female rotor and the male rotor for the second time at a spraying speed of 10cm/s, naturally drying after spraying, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the temperature for 1H at 350 ℃, and naturally cooling the rotor to room temperature after sintering to form a second coating on the surface of the rotor;
in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 77 ℃, and in the step C), the mesh number of a screen in the screening machine is 1300 meshes;
in the steps F) and G), the organic solvent, the cleaning liquid and the clear water are all over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 77 ℃;
in the step F), the meshing gap between the female rotor and the male rotor is 0.065mm, the male rotor needs to rotate in a positive and negative rotation mode in the meshing test process, and the number of rotation turns is more than 20;
the thickness of the coating after two spraying in the step H) and the step I) is 0.045mm, the air pressure of the two spraying in the step H) and the step I) is 0.9MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
Example three:
a coating for a male rotor and a female rotor of a screw compressor comprises 50 parts of polytetrafluoroethylene, 20 parts of molybdenum disulfide, 15 parts of graphite, 15 parts of polytetrafluoroethylene, 10 parts of an adhesion agent, 12 parts of a leveling agent and 30 parts of a diluent;
a preparation method of a coating of a male rotor and a female rotor of a screw compressor comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying the mixture by using the dryer and uniformly stirring;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is made into powder in a powder making machine again;
d: placing the powder raw material obtained in the step C) in a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a test frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
H) the method comprises the following steps Transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine provided in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering to form a first coating on the surface of the rotor;
I) transferring the female rotor and the male rotor in the step H) to a spraying position, spraying the surfaces of the female rotor and the male rotor for the second time at a spraying speed of 10cm/s, naturally drying after spraying, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the temperature for 1H at 350 ℃, and naturally cooling the rotor to room temperature after sintering to form a second coating on the surface of the rotor;
in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 80 ℃, and in the step C), the mesh number of a screen in the screening machine is 1300 meshes;
in the steps F) and G), the organic solvent, the cleaning liquid and the clear water are all over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 80 ℃;
in the step F), the meshing gap between the female rotor and the male rotor is 0.08mm, the male rotor needs to rotate in a positive and negative rotation mode in the meshing test process, and the number of rotation turns is more than 20;
the thickness of the coating after two spraying in the step H) and the step I) is 0.06mm, the air pressure of the two spraying in the step H) and the step I) is 1MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
In summary, the following steps: according to the preparation method of the screw compressor male and female rotor coating, the tetrafluoroethylene, the molybdenum disulfide, the silicon carbide, the graphite, the adhesion agent, the leveling agent and the diluent are used in a matched mode, so that the problem that when the existing male and female rotor coating is used, the male and female rotors are extremely prone to high-temperature deformation and friction damage due to mutual extrusion and friction in the mutual rotating process because the existing male and female rotor coating does not have the functions of wear resistance, high temperature resistance and self-lubricating is solved, and the service life of the male and female rotors of the screw compressor is shortened.
Claims (6)
1. The utility model provides a helical-lobe compressor negative and positive rotor coating which characterized in that: the coating comprises 40-50 parts of polytetrafluoroethylene, 15-20 parts of polytetrafluoroethylene, 10-15 parts of graphite, 10-15 parts of polytetrafluoroethylene, 5-10 parts of an adhesion agent, 8-12 parts of a leveling agent and 20-30 parts of a diluent.
2. The method for preparing the coating of the male and female rotors of the screw compressor according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
a: adding polytetrafluoroethylene, molybdenum disulfide, silicon carbide and graphite into a rotary dryer one by one, drying the mixture by using the dryer and uniformly stirring;
b: pouring the mixture obtained in the step A) into a powder making machine to obtain a powdery mixture;
c: screening the powdery particles obtained in the step B) in a screening machine, wherein the screened qualified powder raw materials are reserved, and the mixture powder with larger particles is made into powder in a powder making machine again;
d: placing the powder raw material obtained in the step C) in a mixer, then adding the adhesion agent, the flatting agent and the diluent one by one, and stirring after the addition is finished so as to fully fuse the adhesion agent, the flatting agent and the diluent with the powder raw material;
e: injecting the mixture obtained in the step D) into a material tank of a spraying machine;
f: taking a pair of female rotor and male rotor of a screw compressor, firstly coating a layer of lubricating oil on the surfaces of the female rotor and the male rotor, placing the female rotor and the male rotor on a testing frame, carrying out meshing trial assembly, transferring the female rotor and the male rotor into an ultrasonic cleaner containing an organic solvent after testing, removing the lubricating oil attached to the surfaces of the female rotor and the male rotor, then transferring the female rotor and the male rotor into the ultrasonic cleaner containing a cleaning solution, removing residual impurities on the surfaces of the female rotor and the male rotor, and transferring the female rotor and the male rotor into a drying furnace for drying treatment;
g: transferring the female rotor and the male rotor in the step F) into an ultrasonic cleaner filled with distilled water for thorough cleaning, transferring the cleaned female rotor and the cleaned male rotor into a dryer, drying and naturally cooling;
transferring the female rotor and the male rotor in the step G) to a spraying position, performing primary spraying on the surfaces of the female rotor and the male rotor by using the spraying machine provided in the step E), wherein the spraying speed is 5cm/s, naturally drying after the spraying is completed, transferring the female rotor and the male rotor into a sintering furnace, heating the temperature of the sintering furnace to 350 ℃ within 20min, preserving the temperature for 1h at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering to form a first coating on the surface of the rotor;
and D) transferring the female rotor and the male rotor in the step H) to a spraying position, carrying out secondary spraying on the surfaces of the female rotor and the male rotor, wherein the spraying speed is 10cm/s, naturally drying after the spraying is finished, transferring the female rotor and the male rotor into a sintering furnace, raising the temperature of the sintering process from room temperature to 350 ℃ within 20min, preserving the heat for 1H at 350 ℃, and naturally cooling the rotor to normal temperature after the sintering so as to form a second coating on the surfaces of the rotors.
3. The method for preparing the coating of the male and female rotors of the screw compressor according to claim 2, wherein the method comprises the following steps: in the step A), the drying time of the rotary dryer is 15 minutes, the drying temperature is 75-80 ℃, and in the step C), the mesh number of the screen in the screening machine is 1300 meshes.
4. The method for preparing the coating of the male and female rotors of the screw compressor according to claim 2, wherein the method comprises the following steps: in the steps F) and G), the organic solvent, the cleaning liquid and the clear water are all over the female rotor and the male rotor, the cleaning time of the ultrasonic cleaner is 10 minutes, the drying time is 15 minutes, and the drying temperature is 75-80 ℃.
5. The method for preparing the coating of the male and female rotors of the screw compressor according to claim 2, wherein the method comprises the following steps: in the step F), the meshing gap between the female rotor and the male rotor is 0.05-0.08 mm, the male rotor needs to rotate positively and negatively in the meshing test process, and the number of rotation turns is more than 20.
6. The method for preparing the coating of the male and female rotors of the screw compressor according to claim 2, wherein the method comprises the following steps: the thickness of the coating after the two-time spraying in the step H) and the step I) is 0.03-0.06 mm, the air pressure of the two-time spraying in the step H) and the step I) is 0.8-1 MPA, and the distance between the spray head and the female rotor and the male rotor is 25cm.
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| CN104893450A (en) * | 2015-06-08 | 2015-09-09 | 烟台大丰轴瓦有限责任公司 | Bearing bush coating material and spraying technique thereof |
| CN112555155A (en) * | 2020-12-08 | 2021-03-26 | 合肥墨研涡旋科技有限公司 | Self-lubricating wear-resistant gasket for electric scroll compressor and preparation method thereof |
| CN113980544A (en) * | 2021-09-17 | 2022-01-28 | 格力电器（武汉）有限公司 | Screw compressor rotor composite coating, preparation method thereof and screw compressor |
| CN114011684A (en) * | 2021-09-17 | 2022-02-08 | 珠海格力电器股份有限公司 | Preparation method of wear-resistant coating of screw compressor and screw compressor |
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2022
- 2022-04-22 CN CN202210428094.7A patent/CN114634739A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104893450A (en) * | 2015-06-08 | 2015-09-09 | 烟台大丰轴瓦有限责任公司 | Bearing bush coating material and spraying technique thereof |
| CN112555155A (en) * | 2020-12-08 | 2021-03-26 | 合肥墨研涡旋科技有限公司 | Self-lubricating wear-resistant gasket for electric scroll compressor and preparation method thereof |
| CN113980544A (en) * | 2021-09-17 | 2022-01-28 | 格力电器（武汉）有限公司 | Screw compressor rotor composite coating, preparation method thereof and screw compressor |
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Application publication date: 20220617 |