CN110541061B - Piston machining method and rotary compressor machining method - Google Patents
Piston machining method and rotary compressor machining method Download PDFInfo
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- CN110541061B CN110541061B CN201910147993.8A CN201910147993A CN110541061B CN 110541061 B CN110541061 B CN 110541061B CN 201910147993 A CN201910147993 A CN 201910147993A CN 110541061 B CN110541061 B CN 110541061B
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- 238000000034 method Methods 0.000 title claims description 27
- 238000003754 machining Methods 0.000 title claims description 7
- 238000003672 processing method Methods 0.000 claims abstract description 14
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims abstract description 9
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- 238000005121 nitriding Methods 0.000 claims description 14
- 239000003507 refrigerant Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910000727 Fe4N Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 241001085205 Prenanthella exigua Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/21—Manufacture essentially without removing material by casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
Abstract
The invention provides a piston processing method and a rotary compressor processing method, relating to the technical field of heating equipment processing, wherein the piston processing method comprises the steps of quenching, deep cooling and tempering a piston; the tempering temperature range is 200-300 ℃, and the heat preservation time range is 100-200 minutes. The piston processing method provided by the invention alleviates the technical problem that the piston and the sliding sheet are easy to wear mutually in the related technology.
Description
Technical Field
The invention relates to the technical field of heating equipment processing, in particular to a piston processing method and a rotary compressor processing method.
Background
The rotary compressor has advantages of high efficiency, compact structure, small volume and light weight, and thus is widely used. The piston and the sliding vane are two important elements in the rotary compressor. In the working process of the rotary compressor, the slip sheet is in close contact with the peripheral surface of the piston to form a dynamic seal, and the piston and the slip sheet work under the conditions of high pressure and high-speed impact of a cold medium all the year round and are easy to wear.
In recent years, the rotary compressor is required to achieve a large capacity and a high speed, and the contact condition between the piston and the sliding vane becomes more severe; in addition, according to the requirement of environmental protection, the new refrigerant is used instead of the traditional R22 refrigerant, and the pressure in the rotary compressor using the new refrigerant is larger, so that the contact area and the mutual action between the sliding sheet and the piston are increased, and the piston and the sliding sheet are easier to generate mutual abrasion.
Disclosure of Invention
The invention provides a piston processing method for relieving the technical problem that pistons and sliding sheets are easy to wear mutually in the related art.
The piston produced by the piston processing method provided by the invention is used for a compressor, the compressor also comprises a slide sheet matched with the piston, and the piston processing method provided by the invention comprises the following steps:
quenching, subzero treatment and tempering are carried out on the piston;
the tempering temperature range is 200-300 ℃, and the heat preservation time range is 100-200 minutes.
Further, the hardness of the piston is processed to HRC50-HRC66 through quenching, cryogenic treatment and tempering treatment.
The second aspect of the present invention provides a method for processing a rotary compressor, so as to alleviate the technical problem in the related art that the piston and the sliding vane are prone to wear each other.
The processing method of the rotary compressor provided by the invention comprises the step of executing the processing method of the piston on the piston.
Further, performing nitridation treatment on the slide sheet to form a nitrided white-bright layer on the surface of the slide sheet;
and grinding and processing the first end face of the sliding sheet after the nitriding treatment, which is matched with the piston, by reserving the white bright layer.
Further, the roughness of the first end face is processed to rz0.1 to rz2.0.
Further, the method comprises the following steps: and grinding and polishing the surface of the sliding sheet after the nitriding treatment except the first end face to remove the white bright layer.
Further, the nitriding treatment of the sliding piece comprises gas nitriding treatment.
Further, the piston is made of bearing steel GCr15, and the sliding piece is made of stainless steel 11Cr 17.
Further, the sliding piece and the piston are assembled.
Further, the rotary compressor uses one of R22, R410A and R32 as a refrigerant.
The hardness of the peripheral surface of the piston and the first end surface of the sliding sheet, which is in contact with the piston, produced by the processing method of the rotary compressor provided by the invention is high, so that the wear resistance of the piston and the sliding sheet is improved; the surface roughness value of the first end surface is low, and when the piston rotates relative to the sliding sheet, the friction force between the circumferential surface of the piston and the first end surface is reduced, so that the mutual abrasion between the piston and the sliding sheet is reduced, and the service life of the piston and the sliding sheet is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an electron microscope photograph of a first end surface before being ground in a method for processing a rotary compressor according to an embodiment of the present invention, the photograph being magnified 1000 times;
fig. 2 is an electron microscope photograph of the first end surface at 1000 times magnification after the first end surface is ground in the method for processing a rotary compressor according to the embodiment of the present invention;
fig. 3 is an electron micrograph of a first end surface magnified 3000 times before grinding the first end surface in the method for processing a rotary compressor according to an embodiment of the present invention;
fig. 4 is an electron microscope photograph of the first end surface magnified 3000 times after the first end surface is ground in the method for processing a rotary compressor according to the embodiment of the present invention;
FIG. 5 is a schematic axial cross-sectional view of a rotary compressor manufactured by the method for manufacturing a rotary compressor according to an embodiment of the present invention;
FIG. 6 is a schematic radial cross-sectional view of a rotary compressor manufactured by the method for manufacturing a rotary compressor according to an embodiment of the present invention;
figure 7 is a graph of wear runs for a comparative experiment.
Icon: 100-a housing; 110-a discharge pipe; 120-a main bearing; 130-secondary bearing; 210-a cylinder; 211-suction inlet; 212-spit-out incision; 213-a suction tube; 220-a piston; 230-a slider; 241-a suction chamber; 242-a compression chamber; 250-a coil spring; 260-a guide groove; 310-a motor; 311-a stator; 312-a rotor; 320-a crankshaft; 330-eccentric portion.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The piston machining method provided by the embodiment of the invention comprises the steps of quenching, cryogenic treatment and tempering the piston 220. Specifically, embodiments of the processing of the piston 220 include:
first embodiment
Selecting a bearing steel GCr15 steel pipe as a production raw material of the piston 220, cutting the steel pipe into the piston 220, and grinding two end faces and the peripheral surface of the piston 220; heating and insulating the piston 220, and then rapidly cooling the heated piston 220; and (3) carrying out cryogenic treatment on the cooled piston 220, and finally carrying out heat preservation treatment on the piston 220 subjected to cryogenic treatment for 200 minutes at the temperature of 200 ℃, wherein the hardness range of the piston 220 subjected to heat treatment is HRC50-HRC 66.
Second embodiment
The operation is different from the first embodiment in that the piston 220 after the cryogenic treatment is finally subjected to the heat preservation treatment for 100 minutes in the environment of 300 ℃, and the hardness of the piston 220 after the heat treatment ranges from HRC50 to HRC 66.
Third embodiment
The operation is different from the first embodiment in that the piston 220 after the cryogenic treatment is finally subjected to the heat preservation treatment at the temperature of 220 ℃ for 170 minutes, and the hardness of the piston 220 after the heat treatment ranges from HRC50 to HRC 66.
Fourth embodiment
The operation is different from the first embodiment in that the piston 220 after the cryogenic treatment is finally subjected to the heat preservation treatment for 150 minutes in the environment of 240 ℃, and the hardness of the piston 220 after the heat treatment ranges from HRC50 to HRC 66.
Fifth embodiment
The operation is different from the first embodiment in that the piston 220 after the cryogenic treatment is finally subjected to the heat preservation treatment for 130 minutes in the environment of 260 ℃, and the hardness of the piston 220 after the heat treatment ranges from HRC50 to HRC 66.
Sixth embodiment
The operation is different from the first embodiment in that the piston 220 after the cryogenic treatment is finally subjected to the heat preservation treatment for 110 minutes in the environment of 280 ℃, and the hardness of the piston 220 after the heat treatment ranges from HRC50 to HRC 66.
A second aspect of the embodiments of the present invention provides a method for processing a rotary compressor, so as to alleviate a technical problem in the related art that a piston and a sliding vane are easily worn away from each other.
The method for processing the rotary compressor provided by the embodiment of the invention comprises the step of executing the above method for processing the piston 220.
The method for processing the rotary compressor provided by the embodiment of the invention comprises the steps of carrying out nitridation treatment on the sliding sheet 230 so as to form a nitrided white-bright layer on the surface of the sliding sheet 230; the first end surface of the sliding piece 230 after the nitriding process, which is engaged with the piston 220, is subjected to a polishing process for retaining a white layer. The method specifically comprises the following steps:
first embodiment
A stainless steel 11Cr17 plate is selected as a production raw material of the sliding sheet 230, and the plate is cut into the shape of the sliding sheet 230; rough grinding two large end faces and a plurality of side faces of the slide sheet 230 formed by cutting; opening the die to punch on the sliding sheet 230, and performing heat treatment operation on the punched sliding sheet 230 to improve the strength of the sliding sheet 230; then, the end face and the side face of the slip sheet 230 are finely ground, and the edge of the slip sheet 230 is chamfered; nitriding the surface of the sliding sheet 230 in a gas nitriding manner to form a nitrided white-bright layer on the surface of the sliding sheet 230, grinding the first end face of the nitrided sliding sheet 230, processing the roughness of the first end face to Rz2.0, and reserving the nitrided white-bright layer of the first end face; specifically, the first end face is an end face of the sliding vane 230 in the rotary compressor, which is in contact with the outer circumferential surface of the piston 220; and then, grinding and grinding the end faces except the first end face of the sliding sheet 230 to remove the nitrided white bright layer on the surface except the first end face, so that the influence of the nitrided white bright layer on the flatness of other surfaces of the sliding sheet 230 is avoided, and the matching precision of the sliding sheet 230 and the cylinder 210 is improved.
Second embodiment
The difference from the first embodiment is that the first end face of the nitrided slider 230 is polished to a roughness rz0.1 and the nitrided white layer of the first end face is left.
Third embodiment
The difference from the first embodiment is that the first end face of the nitrided slider 230 is polished to a roughness rz1.2 and the nitrided white layer of the first end face is left.
After the sliding sheet 230 is nitrided, the outer surface of the sliding sheet 230 forms a compound layer with the thickness of about 10 microns or less, the compound layer is a composite nitride layer of iron, chromium and the like with the same crystal structure with gamma' -Fe4N or epsilon-Fe 2-3N, the composite nitride layer has high hardness and can reach HV1200, and therefore the wear resistance of the sliding sheet 230 is improved.
As shown in fig. 1 and 3, before the first end surface of the vane 230 is polished, the surface of the nitrided bright white layer formed by nitriding on the first end surface has projected crystal grains, and the first end surface is made to have a concave-convex shape. As shown in fig. 2 and 4, after the first end surface of the sliding piece 230 is polished, most of the crystal grains on the first end surface are removed, the surface becomes flat, and the first end surface is made planar, thereby reducing the mutual abrasion between the first end surface and the outer peripheral surface of the piston 220.
The piston 220 and the sliding vane 230 produced by the above method are assembled to complete the assembly of the rotary compressor, and one of R22, R410A and R32 is added to the rotary compressor as a refrigerant.
The piston 220 produced by the processing method of the rotary compressor provided by the embodiment of the invention has high hardness, the first end surface of the sliding sheet 230, which is in contact with the piston 220, has high hardness and low surface roughness value, and the wear resistance of the piston 220 and the sliding sheet 230 is improved; when the piston 220 rotates relative to the sliding vane 230, the friction between the circumferential surface of the piston 220 and the first end surface is reduced, thereby reducing the mutual abrasion between the piston 220 and the sliding vane 230 and prolonging the service life of the piston 220 and the sliding vane 230.
The rotary compressor produced by the embodiment of the invention can use R22, R410A, R32 or CO2 as a refrigerant. The device specifically comprises a shell 100, a compression mechanism and a driving mechanism, wherein the driving mechanism and the compression mechanism are both arranged in the shell 100, and the upper end of the shell 100 is provided with a discharge pipe 110 communicated with the interior of the shell 100.
Specifically, the compression mechanism includes a cylinder 210, a piston 220, and a sliding vane 230, as shown in fig. 6, the cylinder 210 is provided with a receiving cavity having a circular cross section, and the diameter of the receiving cavity is larger than the diameter of the outer circumferential surface of the piston 220. Piston 220 locates and holds the intracavity, and the periphery wall and the lateral wall butt that holds the chamber, the axis of piston 220 is parallel with the axis that holds the chamber. The side wall of the receiving chamber is provided with a guide groove 260 for placing the slide 230, and an opening of the guide groove 260 is opposite to the circumferential surface of the piston 220. The slide plate 230 is disposed along a radial cross section of the cylinder 210, a lower end of the slide plate 230 is located in the receiving cavity and abuts against a circumferential surface of the piston 220, and an upper end surface of the slide plate 230 is located in the guide groove 260. The coil spring 250 in a compressed state is located between the upper end of the slide plate 230 and the bottom wall of the guide groove 260 and is in contact with the upper end of the slide plate 230 and the bottom wall of the guide groove 260, respectively, and the slide plate 230 tends to press the outer peripheral surface of the piston 220 by the restoring force of the coil spring 250. The piston 220 is matched with the vane 230 to divide the accommodating cavity into a suction chamber 241 and a compression chamber 242, a suction port 211 communicated with the suction chamber 241 and a discharge notch 212 communicated with the compression chamber 242 are arranged on the side wall of the cylinder 210, and a suction pipe 213 for communicating the suction port 211 and the outside of the housing 100 is arranged at the suction port 211.
As shown in fig. 5, the driving mechanism includes a motor 310, a crankshaft 320 and an eccentric portion 330, the motor 310 is in transmission connection with the crankshaft 320, the crankshaft 320 is in transmission connection with the eccentric portion 330, and the piston 220 is fixedly sleeved on the outer periphery of the eccentric portion 330. Specifically, the motor 310 includes a stator 311 and a rotor 312, and the stator 311 is fixedly connected to the inner wall of the housing 100. Rotor 312 is positioned within stator 311 and is drivingly connected to crankshaft 320. The upper end of the crankshaft 320 shown in fig. 5 is fixedly connected to the rotor 312, the lower end is located in the accommodating cavity of the cylinder 210, and the axis of the crankshaft 320 coincides with the axis of the accommodating cavity. The eccentric part 330 is located in the containing cavity and fixed on the periphery of the crankshaft 320, the radial section of the eccentric part 330 is circular, and the axis of the eccentric part 330 is staggered with the axis of the crankshaft 320. The piston 220 is fixedly sleeved on the periphery of the eccentric part 330, and the axis of the piston 220 is coincident with the axis of the eccentric part 330. The main bearing 120 is disposed above the cylinder 210, the sub bearing 130 is disposed below the cylinder 210, both the main bearing 120 and the sub bearing 130 are fixedly mounted in the casing 100 and are sleeved on the periphery of the crankshaft 320, and the main bearing 120 and the sub bearing 130 cooperate to support the crankshaft 320, so that the crankshaft 320 can rotate around the axis of the crankshaft 320 in the casing 100.
During the operation of the rotary compressor, the motor 310 drives the crankshaft 320 to drive the eccentric portion 330 and the piston 220 to rotate around the axis of the crankshaft 320, the external low-temperature and low-pressure refrigerant gas enters the suction chamber 241 through the suction pipe 213 and the suction port 211, the refrigerant enters the compression chamber 242 along with the rotation of the piston 220 and is compressed, the temperature and the pressure of the refrigerant gas are increased during the compression process, and finally the refrigerant gas enters the shell 100 through the discharge notch 212 to provide power for the refrigeration cycle.
The rotary compressor produced in the embodiment of the present invention and the rotary compressor produced in the prior art were subjected to a piston and vane wear comparison experiment, and the specific types of the rotary compressors were selected as shown in the following table.
Three different rotary compressors were operated using the same refrigerant, and the specific operation results are shown in the following table.
Fig. 7 is a graph illustrating the abrasion operation of a comparative experiment, and it can be seen from the results of the comparative experiment that the abrasion resistance of the piston 220 and the sliding vane 230 of the rotary compressor produced according to the embodiment of the present invention is improved higher than that of the prior art, the abrasion of the piston 220 and the sliding vane 230 of the rotary compressor is reduced, and the service life of the rotary compressor is extended.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for processing a rotary compressor, wherein the compressor comprises a piston and a slip sheet matched with the piston, and the method is characterized by comprising the following steps:
the piston is made of bearing steel GCr15, and the slide sheet is made of stainless steel 11Cr 17;
quenching, subzero treatment and tempering are carried out on the piston;
the tempering temperature range is 200-300 ℃, and the heat preservation time range is 100-200 minutes; processing the hardness of the piston to HRC50-HRC66 through quenching, cryogenic treatment and tempering treatment;
nitriding the slip sheet to form a nitrided white bright layer on the surface of the slip sheet, wherein the nitrided white bright layer is a composite nitride layer of iron and chromium with the same crystal structure as gamma' -Fe4N or epsilon-Fe 2-3N;
and grinding the first end face of the sliding piece, which is in contact with the outer peripheral face of the piston after the nitriding treatment, to retain the white bright layer, and grinding the surface of the sliding piece, except the first end face, after the nitriding treatment, to remove the white bright layer.
2. The rotary compressor machining method according to claim 1, wherein the roughness of the first end face is machined to rz0.1-rz2.0.
3. The rotary compressor machining method of claim 1 or 2, wherein nitriding the vane comprises gas nitriding.
4. The rotary compressor machine method of claim 1, wherein the vane and the piston are assembled.
5. The method as claimed in claim 1, wherein the rotary compressor uses any one of R22, R410A and R32 as a refrigerant.
6. A rotary compressor, characterized in that the rotary compressor is manufactured by the rotary compressor processing method of any one of claims 1 to 5, and comprises a piston and a slide sheet matched with the piston, the piston is made of bearing steel GCr15, and the hardness of the piston is HRC50-HRC 66;
the sliding piece is made of stainless steel 11Cr17, the sliding piece is subjected to gas nitriding treatment, grinding and grinding, a white bright layer is reserved on a first end face, in contact with the piston, of the sliding piece, the roughness of the first end face is Rz0.1-Rz2.0, and the white bright layer is not reserved on the surface except the first end face.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147993.8A CN110541061B (en) | 2019-02-27 | 2019-02-27 | Piston machining method and rotary compressor machining method |
| PCT/CN2020/076883 WO2020173474A1 (en) | 2019-02-27 | 2020-02-27 | Processing method of piston and processing method of rotary compressor |
| KR1020217028157A KR102619760B1 (en) | 2019-02-27 | 2020-02-27 | Piston processing method and rotary compressor processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147993.8A CN110541061B (en) | 2019-02-27 | 2019-02-27 | Piston machining method and rotary compressor machining method |
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| Publication Number | Publication Date |
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| CN110541061A CN110541061A (en) | 2019-12-06 |
| CN110541061B true CN110541061B (en) | 2021-04-27 |
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| CN201910147993.8A Active CN110541061B (en) | 2019-02-27 | 2019-02-27 | Piston machining method and rotary compressor machining method |
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| KR (1) | KR102619760B1 (en) |
| CN (1) | CN110541061B (en) |
| WO (1) | WO2020173474A1 (en) |
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|---|---|---|---|---|
| CN110541061B (en) * | 2019-02-27 | 2021-04-27 | 中国宁波国际合作有限责任公司 | Piston machining method and rotary compressor machining method |
| CN112160906B (en) * | 2020-09-14 | 2022-08-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Friction pair structure, design method and compressor |
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| JPH07317677A (en) * | 1994-05-26 | 1995-12-05 | Daikin Ind Ltd | Rotary compressor |
| US6030416A (en) * | 1998-02-13 | 2000-02-29 | Pharmacia & Upjohn Ab | Medical implants of stretch-crystallizable elastomers and methods of implantation |
| CN101000054B (en) * | 2006-12-19 | 2013-03-27 | 广东美芝制冷设备有限公司 | Rotating type compressor sliding vane controlling apparatus and controlling method and application thereof |
| CN103898399B (en) * | 2014-04-15 | 2016-04-27 | 松下·万宝(广州)压缩机有限公司 | A kind of high abrasion resisting material and manufacture method thereof and application |
| CN106181271A (en) * | 2016-06-30 | 2016-12-07 | 宁波甬微集团有限公司 | Refrigeration compressor rolling piston manufacture method and rolling piston thereof |
| CN206738167U (en) * | 2017-04-28 | 2017-12-12 | 广东美芝制冷设备有限公司 | Rotary compressor and its pump housing |
| CN206770201U (en) * | 2017-05-31 | 2017-12-19 | 广东美芝制冷设备有限公司 | Rotary compressor |
| CN107401505A (en) * | 2017-08-30 | 2017-11-28 | 广东美芝制冷设备有限公司 | Rotary compressor friction pair and compressor |
| CN110541061B (en) * | 2019-02-27 | 2021-04-27 | 中国宁波国际合作有限责任公司 | Piston machining method and rotary compressor machining method |
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| CN110541061A (en) | 2019-12-06 |
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