JP2005140018A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor provided with a plurality of cylinder bores, a piston reciprocating and moving in the cylinder bores, a valve plate forming a plurality of discharge holes for leading compressed fluid in the cylinder bore to the outside, a plurality of discharge valves like belt plates opening and closing the plurality of discharge holes, and a plurality of retainers for regulating opening of the plurality of discharge valves to allow the retainer to cooperate with the valve plate to nip, hold, and fix a basic part of the discharge valve, allow deformation outside a face in a section where it opposes to the discharge hole in a tip part of the discharge valve, and prevent vibration of specific frequency caused by vibration of the discharge valve from becoming conspicuous. <P>SOLUTION: This compressor is provided with the plurality of cylinder bores, the piston reciprocating and moving in the cylinder bores, the valve plate forming the plurality of discharge holes for leading compressed fluid in the cylinder bore to the outside, the plurality of discharge valves like belt plates opening and closing the plurality of discharge holes, and the plurality of retainers for regulating opening of the plurality of discharge valves. The retainer cooperates with the valve plate to nip, hold, and fix a basic part of the discharge valve and allows deformation outside the face in the section where it opposes to the discharge hole of the discharge valve. A plane shape of the section where deformation of the discharge valve outside the face is possible differs depending on discharge valves or a group of the plurality of discharge valves. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plates that open and close the plurality of discharge holes. And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, the retainer sandwiching and fixing the base of the discharge valve in cooperation with the valve plate and facing the discharge hole of the discharge valve The present invention relates to a compressor configured to allow out-of-plane deformation.

A plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plate-like discharge valves that open and close the plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate, and also deforms the portion facing the discharge hole of the discharge valve. A compressor configured to allow the above is disclosed in Patent Document 1 and the like.
In the conventional compressor disclosed in Patent Document 1 and the like, the planar shape of the part that can be deformed out of plane of the discharge valve is the same for all the discharge valves, and the shape and dimensions of the discharge holes are the same for all the discharge holes. It is.
Japanese Utility Model Hei 5-73276

In the conventional compressor disclosed in Patent Document 1 or the like, the tip of the part that can be deformed out of plane of the discharge valve is in contact with the retainer for opening degree regulation after being separated from the valve plate. The vibration characteristics and the external force characteristics applied to the part by the high pressure gas discharged from the discharge hole are the same for all the discharge valves. Therefore, the part vibrates at the same frequency, and the vibration and gas pulsation of the frequency become remarkable. There is a problem of adversely affecting nearby devices.

The present invention has been made in view of the above problems, and includes a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate in which a plurality of discharge holes that guide the compressed fluid in the cylinder bore are formed, and a plurality of A plurality of strip plate-like discharge valves for opening and closing the discharge holes and a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate In addition, the compressor is configured to allow out-of-plane deformation of a portion facing the discharge hole at the tip of the discharge valve, and vibration at a specific frequency and gas pulsation become remarkable due to vibration of the discharge valve. An object of the present invention is to provide a compressor in which the above is prevented.

In order to solve the above-described problems, in the present invention, a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate in which a plurality of discharge holes that guide the compressed fluid in the cylinder bore are formed, and a plurality of A plurality of strip plate-like discharge valves for opening and closing the discharge holes and a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer cooperates with the valve plate to clamp and fix the base of the discharge valve. Compression that allows out-of-plane deformation of a portion facing the discharge hole of the discharge valve, and that the planar shape of the out-of-plane deformable portion of the discharge valve is different for each discharge valve or for each group of a plurality of discharge valves Provide a machine.
In the present invention, a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of ports that open and close the plurality of discharge holes It has a strip-shaped discharge valve and a plurality of retainers that regulate the opening degree of the plurality of discharge valves. The retainer cooperates with the valve plate to clamp and fix the base of the discharge valve and to face the discharge hole of the discharge valve. There is provided a compressor characterized by allowing out-of-plane deformation of a part to be performed and having a cross-sectional shape of a part of the discharge valve that can be deformed out-of-plane differ for each discharge valve or for each group of a plurality of discharge valves.
In the compressor according to the present invention, since the planar shape or the cross-sectional shape of the part that can be deformed out of plane of the discharge valve differs for each discharge valve or for each group of the plurality of discharge valves, the tip of the part is the valve plate. The vibration characteristics of the part, such as the natural frequency and the vibration mode, until it comes into contact with the retainer for restricting the opening after being separated from the valve differ for each discharge valve or for each group of a plurality of discharge valves, and are remarkable for the part. The frequency of vibration that appears in the valve differs for each discharge valve or for each group of a plurality of discharge valves. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve.

In the present invention, a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of bands that open and close the plurality of discharge holes A plate-like discharge valve and a plurality of retainers for regulating the opening degree of the plurality of discharge valves are provided. The retainer cooperates with the valve plate to sandwich and fix the base of the discharge valve and to face the discharge hole of the discharge valve. Provided is a compressor characterized by allowing out-of-plane deformation of a part and having different shapes and / or dimensions of discharge holes for each discharge hole or for each group of a plurality of discharge holes.
In the compressor according to the present invention, since the shape and / or size of the discharge hole is different for each discharge valve or for each group of a plurality of discharge valves, the tip of the part of the discharge valve that can be deformed out of plane is away from the valve plate. The flow state of the discharge gas in the vicinity of the part and the frequency of the fluctuating external force applied to the part by the discharge gas in the vicinity of the part until the contact with the retainer for opening degree control after the separation is made for each discharge hole or a plurality of discharge holes. The frequency of the vibration that is remarkably expressed in the part differs for each group, and differs for each ejection hole or each group of a plurality of ejection holes. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve.

In the present invention, a plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of bands that open and close the plurality of discharge holes A plate-like discharge valve and a plurality of retainers for regulating the opening degree of the plurality of discharge valves are provided. The retainer cooperates with the valve plate to sandwich and fix the base of the discharge valve and to face the discharge hole of the discharge valve. Allowing out-of-plane deformation of the part, and the relative position in the longitudinal direction of the discharge valve between the tip of the part that can be deformed out-of-plane and the discharge hole is different for each discharge valve or for each group of a plurality of discharge valves. A compressor is provided.
In the compressor according to the present invention, since the relative position in the longitudinal direction of the discharge valve between the discharge valve tip and the discharge hole is different for each discharge valve or for each group of a plurality of discharge valves, the discharge valve can be deformed out of plane. The flow state of the discharge gas in the vicinity of the part and the frequency of the fluctuating external force applied to the part by the discharge valve in the vicinity of the part until the tip of the part is separated from the valve plate and contacts the retainer for opening degree regulation is the discharge valve. The frequency of the vibration that is remarkably expressed in the part differs for each discharge valve or for each group of the plurality of discharge valves. As a result, it is possible to prevent the vibration at a specific frequency from becoming noticeable due to the vibration of the discharge valve.

In the compressor according to the present invention, the planar shape or the cross-sectional shape of the part that can be deformed out of the plane of the discharge valve differs for each discharge valve or for each group of a plurality of discharge valves, so The vibration characteristics of the part, such as the natural frequency and the vibration mode, until the contact with the retainer for opening degree regulation after the separation is different for each discharge valve or for each group of a plurality of discharge valves, and are prominent in the part. The frequency of the vibration to be generated is different for each discharge valve or for each group of a plurality of discharge valves. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve.

  A swash plate compressor according to an embodiment of the present invention will be described.

As shown in FIGS. 1 and 2, a front housing 2 and a cylinder head 3 are disposed so as to cover both ends of a columnar cylinder block 1. A crank chamber 4 is formed inside the front housing 2, and a plurality of cylinder bores 5 are formed inside the cylinder block 1 at intervals in the circumferential direction. A swash plate 6 is disposed in the crank chamber 4. A drive shaft 7 is inserted through the center of the swash plate 6. The drive shaft 7 is rotatably supported by the front housing 2 and the cylinder block 1 via a bearing (not shown).
A rotor 8 is fixed to the drive shaft 7. The rotor 8 is supported by the front housing 2 via a thrust bearing 9.
The swash plate 6 is connected to the rotor 8 via the link mechanism 10 so as to be capable of varying the tilt angle with respect to the drive shaft 7 and not to rotate relative to the rotor 8 around the drive shaft 7.

  A piston 12 is engaged with the swash plate 6 via a shoe 11. The piston 12 extends in parallel with the drive shaft 7 and is inserted into the cylinder bore 5 so as to be slidable back and forth.

A suction chamber 13 and a discharge chamber 14 are defined inside the cylinder head 3. A suction port 3 a formed in the cylinder head 3 communicates with the suction chamber 13. A discharge port (not shown) formed in the cylinder head 3 communicates with the discharge chamber 14.
A gasket 15 and a valve plate 16 are disposed between the cylinder block 1 and the cylinder head 3. The valve plate 16 is formed with a circular suction hole 16 a that communicates with the cylinder bore 5 and the suction chamber 13, and a circular discharge hole 16 b that communicates with the cylinder bore 5 and the discharge chamber 14. The valve plate 15 is equipped with a suction valve 17 that opens and closes the suction hole 16a on the side away from the suction chamber 13, and a discharge valve 18 that opens and closes the discharge hole 16b on the discharge chamber 14 side. The suction valve 17 and the discharge valve 18 are configured as strip-type reed valves that open and close the suction hole 16a and the discharge hole 16b by elastically deforming in the out-of-plane direction due to a pressure difference between the inside and the outside.

A retainer 19 that faces the valve plate 16 with the discharge valve 18 interposed therebetween and restricts the opening degree of the discharge valve 18 is disposed in the discharge chamber 14. The retainer 19 is bolted to the cylinder block 1. The retainer 19 cooperates with the valve plate 16 to clamp and fix the base portion of the partial discharge valve 18 and allows an out-of-plane deformation of a portion facing the discharge hole 16 b of the discharge valve 18.
The planar shape of the out-of-plane deformable portion of the discharge valve 18 is set to be wide for the predetermined number of discharge valves 18 and narrow for the remaining discharge valves 18. The diameter of the discharge hole 16b is set to the same value in all the discharge holes 16b.

The operation of the swash plate compressor according to this embodiment will be described below.
The drive shaft 7 is rotationally driven by an external drive source (not shown), and the swash plate 6 rotates as the drive shaft 7 rotates. As the swash plate 6 rotates, the piston 12 reciprocates in the cylinder bore 5. As the piston 12 reciprocates, the refrigerant gas flowing from the external refrigeration circuit through the suction port 3 a into the suction chamber 13 is sucked into the bore 5 through the suction hole 16 a and is compressed in the bore 5. The refrigerant gas pressure in the bore 5 rises, the tip of the part that can be deformed out of plane of the discharge valve 18 is separated from the valve plate 16, and the discharge hole 16b is opened. The opening degree of the discharge valve 18 is regulated when the tip of the part contacts the retainer 19. The pressurized refrigerant gas in the bore 5 is guided to a part of the discharge valve 18 that is deformed out of plane and discharged into the discharge chamber 14, and flows out from the discharge chamber 14 to an external refrigeration circuit through a discharge port (not shown).

In the swash plate compressor according to the present embodiment, the planar shape of the portion of the discharge valve 18 that can be deformed out of plane is set to be wide for the predetermined number of discharge valves 18 and narrow for the remaining discharge valves 18. Since the planar shape of the part is different for each group of the plurality of discharge valves 18, the natural frequency and vibration until the tip of the part comes into contact with the retainer 19 for opening degree regulation after being separated from the valve plate 16. The vibration characteristics of the part such as the mode are different for each group of the plurality of discharge valves 18, and the frequency of vibration that is remarkably generated in the part is different for each group of the plurality of discharge valves 18. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.
The planar shape of the out-of-plane deformable portion of the discharge valve 18 may be different for every three or more groups.
It is not necessary for the formation of the group to have regularity such as forming one group with the discharge valves 18 picked up every other group and forming another group with the remaining discharge valves 18.
The planar shape of the entire portion of the discharge valve 18 that can be deformed out of plane may be made different, or, for example, only the planar shape of the tip portion of the portion may be made different, or only the planar shape in the vicinity of the fixed end may be made different.

The planar shape of the out-of-plane deformable portion of the discharge valve 18 may be different for each discharge valve 18.
Since the planar shape of the portion of the discharge valve 18 that can be deformed out of plane differs from one discharge valve 18 to another, it is inherent until the tip of the portion contacts the retainer 19 for regulating the opening after the tip of the portion is separated from the valve plate 16. The vibration characteristics of the part, such as the frequency and the vibration mode, are different for each discharge valve 18, and the frequency of vibration that is remarkably generated in the part is different for each discharge valve 18. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.

Instead of making the planar shape of the out-of-plane deformable portion of the discharge valve 18 different for each discharge valve 18 or for each group of a plurality of discharge valves 18, as shown in FIG. The cross-sectional shape of the possible portion may be different for each discharge valve 18 or for each group of the plurality of discharge valves 18.
Since the cross-sectional shape of the portion of the discharge valve 18 that can be deformed out of plane differs for each discharge valve 18 or for each group of the plurality of discharge valves 18, it is used for opening degree regulation after the tip of the portion is separated from the valve plate 16. The vibration characteristics of the part such as the natural frequency and the vibration mode until contacting the retainer 19 are different for each discharge valve 18 or each group of the plurality of discharge valves 18, and the frequency of vibration that is remarkably expressed in the part. Is different for each discharge valve 18 or for each group of a plurality of discharge valves 18. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.
The longitudinal cross-sectional shape of the portion of the discharge valve 18 that can be deformed out of the plane may be different for each discharge valve 18 or for each group of the plurality of discharge valves 18.
The cross-sectional shape of the entire portion of the discharge valve 18 that can be deformed out of plane may be made different, or, for example, only the cross-sectional shape of the tip portion of the portion may be made different, or only the cross-sectional shape in the vicinity of the fixed end may be made different.
There is no need to have regularity in the formation of groups.

Instead of changing the planar shape of the out-of-plane deformable portion of the discharge valve 18 for each discharge valve 18 or for each group of the plurality of discharge valves 18, as shown in FIG. The planar shape of the possible portions may be the same for all the discharge valves 18, and the diameter of the discharge holes 16 b may be set large for the predetermined number of discharge holes 16 b and small for the remaining discharge holes 16 b.
Since the dimension of the discharge hole 16b differs for each group of the plurality of discharge holes 16b, the tip of the part that can be deformed out of plane of the discharge valve 18 is in contact with the retainer 19 for opening degree regulation after being separated from the valve plate 16. In the meantime, the flow state of the discharge gas in the vicinity of the part, and hence the frequency of the variable external force applied to the part differs for each group of the plurality of discharge holes 16b, and the frequency of the vibration that appears remarkably in the part is the plurality of discharge holes. Different for each group of 16b. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.
The diameter of the discharge hole 16b may be different for every three or more groups.
The diameter of the discharge hole 16b may be different for each discharge hole 16b.
The shape of the discharge hole 16b is not limited to a circle. For example, the dimensions of the elliptical discharge holes may be different.
There is no need to have regularity in the formation of groups.

The shape of the discharge holes 16b may be different for each of the discharge holes 16b or for each group of the plurality of discharge holes 16b, for example, a circle, an ellipse, or a heart shape.
Since the shape of the discharge hole 16b is different for each discharge hole 16b or for each group of the plurality of discharge holes 16b, the retainer for restricting the degree of opening after the tip of the part that can be deformed out of plane of the discharge valve 18 is separated from the valve plate 16 The flow state of the discharge gas in the vicinity of the part and the frequency of the fluctuating external force applied to the part are different for each of the plurality of discharge hole 16b groups until the contact with the part 19, and the frequency of the vibration that is remarkably expressed in the part Is different for each group of the plurality of discharge holes 16b. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.
There is no need to have regularity in the formation of groups.

Instead of making the planar shape of the out-of-plane deformable portion of the discharge valve 18 different for each discharge valve 18 or for each group of the plurality of discharge valves 18, as shown in FIG. The relative position in the longitudinal direction of the discharge valve 18 between the tip of the possible portion and the discharge hole 16 b may be different for each discharge valve 18 or for a group of a plurality of discharge valves 18.
Since the relative position in the longitudinal direction of the discharge valve 18 between the tip of the discharge valve 18 that can be deformed out of the plane and the discharge hole 16b is different for each discharge valve 18 or for each group of the plurality of discharge valves 18, the tip of the portion The flow state of the discharge gas in the vicinity of the portion of the discharge valve 18 and the fluctuating external force applied to the portion of the discharge valve 18 until the valve contacts the retainer for regulating the opening after being separated from the valve plate 16. Is different for each discharge valve 18 or for each group of a plurality of discharge valves 18, and the frequency of vibration that is noticeably generated in the portion of the discharge valve 18 is for each discharge valve 18 or for each group of a plurality of discharge valves 18. Different. As a result, it is possible to prevent a specific frequency vibration and gas pulsation from becoming prominent due to the vibration of the discharge valve 18.
There is no need to have regularity in the formation of groups.

  The present invention is not limited to a swash plate compressor, and includes a plurality of cylinder bores, a piston reciprocatingly moved in the cylinder bore, a valve plate having a plurality of discharge holes for guiding compressed fluid in the cylinder bore to the outside, and a plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer cooperates with the valve plate to sandwich and fix the base of the discharge valve and discharge valve The present invention can be applied to various reciprocating compressors configured to allow out-of-plane deformation of a portion facing the discharge hole.

It is sectional drawing of the swash plate type compressor which concerns on 1st Example of this invention. It is an II-II arrow line view of FIG. It is a fragmentary sectional view of the swash plate type compressor which concerns on 2nd Example of this invention. It is a figure equivalent to FIG. 2 of the swash plate type compressor which concerns on 3rd Example of this invention. It is a figure equivalent to FIG. 2 of the swash plate type compressor which concerns on 4th Example of this invention.

Explanation of symbols

1 Cylinder Block 2 Housing 3 Cylinder Head 4 Crank Chamber 5 Cylinder Bore 6 Swash Plate 12 Piston 13 Suction Chamber 14 Discharge Chamber 16 Valve Plate 16a Suction Hole 16b Discharge Hole 18 Discharge Valve 19 Retainer

Claims (4)

A plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plate-like discharge valves that open and close the plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate, and also deforms the portion facing the discharge hole of the discharge valve. The compressor is characterized in that the planar shape of the portion of the discharge valve that can be deformed out of plane is different for each discharge valve or for each group of a plurality of discharge valves. A plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plate-like discharge valves that open and close the plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate, and also deforms the portion facing the discharge hole of the discharge valve. And the cross-sectional shape of the portion of the discharge valve that can be deformed out of the plane is different for each discharge valve or for each group of a plurality of discharge valves. A plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plate-like discharge valves that open and close the plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate, and also deforms the portion facing the discharge hole of the discharge valve. The compressor is characterized in that the shape and / or size of the discharge hole is different for each discharge hole or for each group of a plurality of discharge holes. A plurality of cylinder bores, a piston that reciprocates in the cylinder bore, a valve plate having a plurality of discharge holes that guide the compressed fluid in the cylinder bore to the outside, and a plurality of strip plate-like discharge valves that open and close the plurality of discharge holes And a plurality of retainers for regulating the opening degree of the plurality of discharge valves, and the retainer clamps and fixes the base of the discharge valve in cooperation with the valve plate, and also deforms the portion facing the discharge hole of the discharge valve. And the relative position in the longitudinal direction of the discharge valve between the tip of the discharge valve that can be deformed out of the plane and the discharge hole is different for each discharge valve or for each group of a plurality of discharge valves. .

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