JP5209337B2 - Method for processing contact portion between valve plate of reciprocating compressor and suction valve and / or discharge valve, and reciprocating compressor - Google Patents

Description

The present invention relates to a method for processing a contact portion between a valve plate of a reciprocating compressor and a suction valve and / or a discharge valve, and a reciprocating compressor.

A cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, a suction valve as a reed valve for opening and closing the suction hole, and opening and closing the discharge hole The valve of a reciprocating compressor comprising a discharge valve that is a reed valve, a suction chamber that communicates with a cylinder bore via a suction hole and a suction valve, and a discharge chamber that communicates with a cylinder bore via a discharge valve and a discharge hole A processing method for preventing sticking of a contact portion between a plate and a suction valve and / or a discharge valve, the suction plate surrounding portion of the contact surface of the valve plate with the suction valve and / or the discharge valve of the valve plate Patent Document 1 discloses a processing method characterized in that the peripheral portion of the discharge hole on the contact surface with the surface is melted and scattered by laser processing, and the non-laser processing portion is projected from the laser processing portion.
The processing method of Patent Document 1 has advantages in that the processing medium does not remain and the protrusion can be made with high accuracy, compared to the conventional processing method in which the protrusion is formed by shot blasting.
JP2007-064196

The processing method of Patent Document 1 has a problem that precision machining is required and productivity is poor because a part of the valve plate is melted and scattered to form protrusions.
The present invention has been made in view of the above problems, and includes a cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, and a suction hole. A suction valve that is a reed valve that opens and closes, a discharge valve that is a reed valve that opens and closes a discharge hole, a suction chamber that communicates with the cylinder bore via the suction hole and the suction valve, and a cylinder bore that passes through the discharge valve and the discharge hole A processing method for preventing sticking of a contact portion between a valve plate and a suction valve and / or a discharge valve of a reciprocating compressor provided with a discharge chamber communicating with the valve, produced in comparison with the method of Patent Document 1 It aims at providing the processing method with good property.

In order to solve the above-described problems, in the present invention, a cylinder bore, a piston inserted into the cylinder bore so as to be reciprocally movable, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, and a suction hole are opened and closed. A suction valve as a reed valve, a discharge valve as a reed valve for opening and closing the discharge hole, a suction chamber communicating with the cylinder bore via the suction hole and the suction valve, and a cylinder bore via the discharge valve and the discharge hole. A processing method for preventing sticking of a contact portion between a valve plate and a suction valve and / or a discharge valve of a reciprocating compressor provided with a communicating discharge chamber, the contact surface of the valve plate with the suction valve The portion near the suction hole and / or the portion near the discharge hole of the contact surface of the valve plate with the discharge valve are quenched without melting by laser processing, and then the contact surface of the valve plate with the suction valve and / or Polish and quench the contact surface of the valve plate with the discharge valve To provide a processing method for causing a projection of the section from unquenched portions.
In the present invention, a cylinder bore, a piston inserted into the cylinder bore so as to be capable of reciprocating, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, and a suction valve that is a reed valve that opens and closes the suction hole A reciprocating valve including a discharge valve that is a reed valve that opens and closes the discharge hole, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole A processing method for preventing sticking of a contact portion between a valve plate and a suction valve and / or a discharge valve of a dynamic compressor, which faces a portion near a suction hole on a contact surface of the valve plate with the suction valve Laser processing of the part of the contact surface with the valve plate of the suction valve and / or the part of the contact surface with the valve plate of the discharge valve facing the vicinity of the discharge hole of the contact surface of the valve plate with the discharge valve Quenching without melting, and then with the valve plate of the suction valve To provide a processing method for causing a projection of the portion hardened by polishing the contact surface of the valve plate of the contact surface and / or the discharge valve from unquenched portions.
In the present invention, a part of the valve plate, the suction valve or the discharge valve is quenched without being melted by laser processing, and then the valve plate, the suction valve or the discharge valve is polished to form a projection. Productivity is better than when a part is melted and scattered to form protrusions.

The vicinity of the suction hole includes a continuous annular region surrounding the suction hole, an intermittent annular region surrounding the suction hole, a continuous arc region along a part of the suction hole periphery, and an intermittent arc shape along a part of the suction hole periphery. The region may be any of a continuous linear region close to the periphery of the discharge hole and an intermittent linear region close to the periphery of the suction hole. The vicinity of the discharge hole surrounds the continuous annular region surrounding the discharge hole and the discharge hole. Intermittent annular region, continuous arc-shaped region along a part of the periphery of the discharge hole, intermittent arc-shaped region along a part of the periphery of the discharge hole, continuous linear region close to the periphery of the discharge hole, close to the periphery of the discharge hole Any of the intermittent linear regions may be used.

The reciprocating compressor includes a plurality of cylinder bores disposed on the same circumference at intervals in the circumferential direction, and a plurality of suction holes disposed on the same circumference at intervals in the circumferential direction. And a plurality of discharge holes disposed on the same circumference at intervals in the circumferential direction, all of the plurality of suction holes on the contact surface of the valve plate with the suction valve intersect. The interrupted annular region and / or the interrupted annular region intersecting all of the plurality of discharge holes on the contact surface of the valve plate with the discharge valve are quenched without melting by laser processing, or the valve plate A continuous annular region adjacent to all of the plurality of suction holes on the contact surface with the suction valve and / or continuous adjacent to all of the plurality of discharge holes on the contact surface of the valve plate with the discharge valve The annular region is quenched by laser processing without melting, and then the valve plate is polished It may be projections quenching part from unquenched part Te. Since laser processing can be performed in one pass, productivity is improved.

If the width of the protrusion is too narrow, the protrusion will wear early, and if the width of the protrusion is too wide, the valve will stick to the protrusion. The width of the protrusion is preferably 0.1 mm to 2 mm.
If the protrusion is too low, the protrusion will be worn early, and if the protrusion is too high, the valve closing may be poor. The height of the protrusion is preferably 0.01 mm to 0.5 mm.
If the surface roughness of the protrusion is large, a gap is formed between the protrusion and the valve or valve plate that contacts the protrusion, and leakage occurs during compression or suction, resulting in a reduction in compression efficiency. Therefore, the surface roughness of the protrusion is desirably smaller than the surface roughness of the non-quenched portion which is a flat portion, and is preferably Rz10 or less.

If the difference between the hardness of the hardened part by laser processing and the hardness of the non-hardened part is small, protrusions cannot be formed even if polished. It is preferable that the hardness of the quenched portion is HV100 or more higher than the hardness of the non-quenched portion.
Since the carbon dioxide laser can obtain a high output, it is suitable for quenching.

In the present invention, a part of the valve plate, the suction valve, or the discharge valve is quenched without being melted by laser processing, and then polished to form a protrusion, so that productivity is good.

A method for processing a contact portion between a valve plate and a suction valve and / or a discharge valve of a reciprocating compressor according to an embodiment of the present invention will be described.

As shown in FIG. 1, the variable capacity swash plate compressor 1 includes a cylinder block 2 having a cylinder bore 2 a having a circular cross section, a front head 4 that forms a crank chamber 3 in cooperation with the cylinder block 2, and a crank chamber 3. The rotary shaft 5 is rotatably supported by the cylinder block 2 and the front head 4 and has one end penetrating the front head 4 and extending out of the compressor. In cooperation with the cylinder block 2, the swash plate 6 that is rotationally driven by the rotary shaft 5, the piston 7 that is inserted into the cylinder bore 2 a and engages with the swash plate 6 and reciprocates as the swash plate 6 rotates. And a cylinder head 9 having an annular cavity-like suction chamber 9a and a circular cavity-like discharge chamber 9b sandwiched between the valve plate 8 in which a suction hole 8a and a discharge hole 8b are formed. Bro 2 and the valve plate 8 are fixed by being sandwiched between the valve plate 8 and the other end portion of the intake valve 10a. The valve retainer 11 and the valve plate 8 have one end portion disposed in the discharge chamber 9b. And a discharge valve 10b which is a reed valve that opens and closes the discharge hole 8b.
A plurality of cylinder bores 2a are arranged on the same circumference at intervals in the circumferential direction, and a plurality of suction holes 8a are arranged on the same circumference at intervals in the circumferential direction. A plurality of discharge holes 8b are arranged on the same circumference with a gap therebetween.
The suction chamber 9a communicates with an evaporator of an automobile air conditioner (not shown) via a suction port 9a ', and communicates with the cylinder bore 2a via a suction hole 8a and a suction valve 10a.
The discharge chamber 9b communicates with a condenser of an automobile air conditioner (not shown) via a discharge port 9b ', and communicates with the cylinder bore 2a via a discharge valve 10b and a discharge hole 8b.
On the end face of the cylinder block 2 on the valve plate 8 side, an opening restriction recess 2b that restricts the opening of the intake valve 10a is formed.

As shown in FIG. 2A, a portion of the iron valve plate 8 in contact with the suction valve 10a in the vicinity of the suction hole 8a, more specifically, a continuous annular region R1 surrounding the suction hole 8a, It quenches without being melted by gas laser processing, and then the contact surface of the valve plate 8 with the suction valve 10a is polished so that the quenched portion protrudes from the non-quenched portion, and the discharge valve 10b of the valve plate 8 A portion in the vicinity of the discharge hole 8b on the contact surface, more specifically, a continuous annular region R1 ′ surrounding the discharge 8b is quenched without melting by carbon dioxide laser processing, and then the discharge valve 10b of the valve plate 8 The hardened part is protruded from the non-hardened part by polishing the contact surface.
The quenching may be made into a large number of spots using a thin laser beam with a narrow focus, or may be made into a strip using a thick laser beam with a small focus.
As shown in FIG. 3, the width of the protrusion is set to 0.1 mm to 2 mm, and the height of the protrusion is set to 0.01 mm to 0.5 mm. The surface roughness of the protrusions is set to Rz10 or less, and the hardness of the quenched portion is set to be HV100 or more higher than the hardness of the non-quenched portion.

In the variable capacity swash plate compressor 1, the rotating shaft 5 is rotationally driven by an automobile engine (not shown), the swash plate 6 rotates with the rotation of the rotating shaft 5, and the piston 7 reciprocates. As the piston 7 is reciprocated, the refrigerant gas returned from the evaporator of the air conditioner flows into the cylinder bore 2a through the suction port 9a ', the suction chamber 9a, the suction hole 8a, and the suction valve 10a, and in the cylinder bore 2a. Compressed and flows out to the condenser of the air conditioner through the discharge hole 8b, the discharge valve 10b, the discharge chamber 9b, and the discharge port 9b ′.

In the variable capacity swash plate compressor 1, the suction surface of the valve plate 8 with the suction valve 10a and the vicinity of the suction hole 8a and the contact surface of the valve plate 8 with the discharge valve 10b and the vicinity of the discharge hole 8b are provided. Since the protrusion is formed, sticking of the suction valve 10a and the discharge valve 10b to the valve plate 8 due to the adhesive force of the lubricating oil contained in the refrigerant gas is suppressed, and the intake valve 10a and the discharge valve 10b are opened. The intake valve due to a severe collision between the tip of the intake valve 10a and the opening restriction surface of the opening restriction concave portion 2b, a severe collision between the discharge valve 10b and the valve retainer 11, etc., which is suppressed due to the delay in valve opening. 10a and discharge valve 10b are prevented from being damaged and no noise is generated.
In the variable capacity swash plate compressor 1, since a part of the valve plate 8 is quenched without being melted by laser processing, and then the valve plate 8 is polished to form protrusions, the productivity of protrusion formation is high. good.
If the width of the protrusion is too narrow, the protrusion will wear early, and if the width of the protrusion is too wide, the valve will stick to the protrusion. The width of the protrusion is preferably 0.1 mm to 2 mm.
If the protrusion is too low, the protrusion will be worn out early, and if the protrusion is too high, the valve closing may be poor. The height of the protrusion is preferably 0.01 mm to 0.5 mm.
When the surface roughness of the protrusion is large, a gap is formed between the protrusion and the suction valve 10a and the discharge valve 10b that are in contact with the protrusion, and leakage occurs during compression or suction, resulting in a reduction in compression efficiency. Therefore, the surface roughness of the protrusion is desirably smaller than the surface roughness of the non-quenched portion which is a flat portion, and is preferably Rz10 or less.
If the difference between the hardness of the quenched portion and the hardness of the non-quenched portion is small, protrusions cannot be formed even if polished. It is preferable that the hardness of the quenched portion is HV100 or more higher than the hardness of the non-quenched portion.
Since the carbon dioxide laser can obtain a high output, it is suitable for quenching.

The vicinity of the suction hole to be quenched is along the annular regions R2 and R3 that are intermittently surrounding the suction hole 8a shown in FIGS. 2B and 2C, and part of the periphery of the suction hole 8a shown in FIG. A continuous arcuate region R4, an interrupted arcuate region R5 along a part of the periphery of the suction hole 8a shown in FIG. 2 (e), a continuous single piece adjacent to the periphery of the suction hole 8a shown in FIGS. 2 (f) and (g), or Either a plurality of linear regions R6 or R7, or an intermittent single or a plurality of linear regions adjacent to the periphery of the suction hole 8a may be used.
The portions near the discharge holes to be quenched are intermittent annular regions R2 ′ and R3 ′ surrounding the discharge holes 8b shown in FIGS. 2B and 2C, and a part of the periphery of the discharge holes 8b shown in FIG. A continuous arcuate region R4 ′ along the periphery of the discharge hole 8b shown in FIG. 2E, an intermittent arcuate region R5 ′ along a part of the periphery of the discharge hole 8b, and the periphery of the discharge hole 8b shown in FIGS. Any one of the continuous single or plural linear regions R6 ′ or R7 ′ and the intermittent single or plural linear regions adjacent to the periphery of the discharge hole 8b may be used.

As shown in FIGS. 4 (a) and 4 (b), the single or a plurality of intermittent annular regions R8 or R9 intersecting all of the plurality of suction holes 8a on the contact surface of the valve plate 8 with the suction valve 10a. And a single or a plurality of intermittent annular regions R8 ′, R9 ′ intersecting all of the plurality of discharge holes 8b on the contact surface of the valve plate 8 with the discharge valve 10b are melted by carbon dioxide laser processing. Quenching may be performed, and then the valve plate 8 may be polished to protrude the quenched portion from the non-quenched portion.
As shown in FIG. 4 (c), a continuous annular region R10 on the contact surface of the valve plate 8 with the suction valve 10a, close to all of the plurality of suction holes 8a, and the discharge valve 10b of the valve plate 8 The continuous annular region R10 ′ adjacent to all of the plurality of discharge holes 8b on the contact surface is quenched without being melted by carbon dioxide laser processing, and then the valve plate 8 is polished to form a quenched portion. You may make it protrude from a non-hardening part.
The quenching may be made into a large number of spots using a thin laser beam with a narrow focus, or may be made into a strip using a thick laser beam with a small focus.
In the case of FIGS. 4A and 4C, laser processing can be performed in one pass, and in the case of FIG. 4B, laser processing can be performed in a small number of passes, so that productivity is improved.

In the above embodiment, the protrusion is formed on the contact surface of the valve plate 8 with the suction valve 10a and the contact surface of the discharge valve 10b. However, the contact surface of the valve plate 8 with the suction valve 10a or the discharge valve 10b. A protrusion may be formed on either one of the contact surfaces.
In the above embodiment, the protrusions are formed on the valve plate 8. However, the protrusions in FIGS. 2A to 2G are formed using the same processing method as that used when forming the valve plate 8 on the intake valve 10a and Alternatively, the discharge valve 10b may be formed.

The present invention is widely applicable to various reciprocating compressors including a swash plate compressor and a swing plate compressor.

It is sectional drawing of the variable capacity | capacitance swash plate type compressor in which the processing method which concerns on the Example of this invention was used. It is a top view of the contact part of a valve plate, a suction valve, and a discharge valve which shows a processing method concerning an example of the present invention. It is sectional drawing of the contact part of the valve plate which shows the processing method which concerns on the Example of this invention, a suction valve, and a discharge valve. It is a top view of the contact part of a valve plate, a suction valve, and a discharge valve which shows a processing method concerning an example of the present invention.

1 Variable capacity swash plate compressor
2 Cylinder block
2a Cylinder bore
2b Opening restriction recess
3 Crank chamber
4 Front head
5 Rotating shaft
6 Swash plate
7 Piston
8 Valve plate
8a Suction hole
8b Discharge hole
9 Cylinder head
9a Inhalation chamber
9b Discharge chamber
10a Suction valve
10b Discharge valve
11 Valve retainer
R1, R1 'continuous annular region
R2, R3, R2 ', R3' intermittent annular region
R4, R4 'continuous arcuate region
R5, R5 'Intermittent arcuate region
R6, R7, R6 ', R7' Continuous linear region
R8, R9, R8 ', R9' Intermittent annular region
R10, R10 'continuous annular region

Claims (17)

A cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, a suction valve as a reed valve for opening and closing the suction hole, and opening and closing the discharge hole The valve of a reciprocating compressor comprising a discharge valve that is a reed valve, a suction chamber that communicates with a cylinder bore via a suction hole and a suction valve, and a discharge chamber that communicates with a cylinder bore via a discharge valve and a discharge hole A processing method for preventing sticking of a contact portion between a plate and a suction valve and / or a discharge valve, wherein the portion of the valve plate in contact with the suction valve in the vicinity of the suction hole and / or the discharge valve of the valve plate The portion near the discharge hole of the contact surface with the nozzle is quenched without melting by laser processing, and then the contact surface of the valve plate with the suction valve and / or the contact surface of the valve plate with the discharge valve is polished. The hardened part protrudes from the non-hardened part Processing method for. A cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, a suction valve as a reed valve for opening and closing the suction hole, and opening and closing the discharge hole The valve of a reciprocating compressor comprising a discharge valve that is a reed valve, a suction chamber that communicates with a cylinder bore via a suction hole and a suction valve, and a discharge chamber that communicates with a cylinder bore via a discharge valve and a discharge hole A processing method for preventing sticking of a contact portion between a plate and a suction valve and / or a discharge valve, the valve plate of the suction valve facing a portion near the suction hole of the contact surface of the valve plate with the suction valve The portion of the contact surface with the valve plate of the discharge valve facing the portion near the discharge hole of the contact surface with the discharge valve of the valve plate and / or the contact surface with the discharge valve of the valve plate is baked without melting by laser processing. And then the contact surface with the valve plate of the suction valve and / or the discharge valve By polishing the contact surface of the valve plate, a processing method for causing a projection of the quenching unit from unquenched portions. The processing method according to claim 1 or 2, wherein the portion near the suction hole is a continuous annular region surrounding the suction hole, and the portion near the discharge hole is a continuous annular region surrounding the discharge hole. The processing method according to claim 1, wherein the vicinity of the suction hole is an intermittent annular region surrounding the suction hole, and the vicinity of the discharge hole is an intermittent annular region surrounding the discharge hole. 3. The vicinity of the suction hole is a continuous arcuate region along a part of the periphery of the suction hole, and the vicinity of the discharge hole is a continuous arcuate region along a part of the periphery of the discharge hole. The processing method described. The vicinity of the suction hole is an intermittent arc-shaped region along a part of the periphery of the suction hole, and the vicinity of the discharge hole is an intermittent arc-shaped region along a part of the periphery of the discharge hole. The processing method described. The vicinity of the suction hole is a continuous linear region close to the periphery of the suction hole, and the vicinity of the discharge hole is a continuous linear region close to the periphery of the discharge hole. Processing method. The vicinity of the suction hole is an intermittent linear region close to the periphery of the suction hole, and the vicinity of the discharge hole is an intermittent linear region close to the periphery of the discharge hole. Processing method. A cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, a suction valve as a reed valve for opening and closing the suction hole, and opening and closing the discharge hole A discharge valve that is a reed valve, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole. A plurality of cylinder bores are disposed on the same circumference and spaced apart from each other in the circumferential direction, and a plurality of suction holes are disposed on the same circumference and spaced from each other in the circumferential direction on the same circumference. A processing method for preventing sticking of a contact portion between a valve plate and a suction valve and / or a discharge valve of a reciprocating compressor provided with a plurality of discharge holes, comprising: Intermittently intersecting all of the plurality of suction holes of the contact surface The annular annular region and / or the intermittent annular region intersecting all of the plurality of discharge holes on the contact surface of the valve plate with the discharge valve is quenched without being melted by laser processing, and then the valve plate suction valve And / or the contact surface of the valve plate with the discharge valve is polished to cause the hardened portion to protrude from the non-hardened portion. A cylinder bore, a piston inserted into the cylinder bore so as to be able to reciprocate, a valve plate formed with a suction hole and a discharge hole communicating with the cylinder bore, a suction valve as a reed valve for opening and closing the suction hole, and opening and closing the discharge hole A discharge valve that is a reed valve, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole. A plurality of cylinder bores are disposed on the same circumference and spaced apart from each other in the circumferential direction, and a plurality of suction holes are disposed on the same circumference and spaced from each other in the circumferential direction on the same circumference. A processing method for preventing sticking of a contact portion between a valve plate and a suction valve and / or a discharge valve of a reciprocating compressor provided with a plurality of discharge holes, comprising: A continuous adjacent to all of the plurality of suction holes of the contact surface An annular region and / or a continuous annular region adjacent to all of the plurality of discharge holes on the contact surface of the valve plate with the discharge valve is quenched without melting by laser processing, and then the valve plate suction valve And / or the contact surface of the valve plate with the discharge valve is polished to cause the hardened portion to protrude from the non-hardened portion. The processing method according to any one of claims 1 to 10, wherein the width of the protrusion is 0.1 mm to 2 mm. The processing method according to claim 1, wherein the height of the protrusion is 0.01 mm to 0.5 mm. The processing method according to claim 1, wherein the surface roughness of the protrusion is smaller than the surface roughness of a portion excluding the protrusion. The processing method according to claim 13, wherein the surface roughness of the protrusion is Rz10 or less. The processing method according to any one of claims 1, 2, 9, and 10, wherein the hardness of the quenched portion is HV100 or more higher than the hardness of the non-quenched portion. The processing method according to any one of claims 1, 2, 9, 10, and 15, wherein laser processing is performed using a carbon dioxide gas laser. A reciprocating compressor, wherein a contact portion between a valve plate and a suction valve and / or a discharge valve is processed by the processing method according to any one of claims 1 to 16.

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