KR100550764B1 - Oil valve assembly of reciprocating compressor - Google Patents

Abstract

The present invention relates to a reciprocating compressor in which a piston sucks and compresses a refrigerant into a compression space while linearly reciprocating inside a cylinder, and then discharges the oil. The oil supply amount is installed on an oil passage for supplying oil between the piston and the cylinder. It relates to an oil supply valve assembly of the reciprocating compressor to adjust the pressure.

The oil supply valve assembly of the reciprocating compressor according to the present invention is an assembly consisting of an oil valve, an oil seat, and an oil cover. The oil valve has an elastic member formed at a circumferential part of the oil valve in such a way that the suction valve and the discharge valve can be opened and closed. Since it is formed to be coated, a separate gasket to prevent leakage of oil is not included, so the number of parts is reduced, and thus, the fastening force and the sealing effect may be improved.

Reciprocating compressor, shell, cylinder, piston, oil supply device, oil supply valve assembly, oil valve, oil seat, oil cover

Description

Oil supply valve assembly for reciprocating compressor {OIL VALVE ASSEMBLY OF RECIPROCATING COMPRESSOR}             

1 is a side cross-sectional view showing a typical reciprocating compressor,

Figure 2 is a side sectional view showing an oil supply device of a reciprocating compressor according to the prior art,

3 is an exploded perspective view showing an oil supply valve of a reciprocating compressor according to the prior art,

4 is a side sectional view showing an oil supply device of a reciprocating compressor according to the present invention;

5 is an exploded perspective view showing an oil supply valve of the reciprocating compressor according to the present invention.

<Explanation of symbols on main parts of the drawings>

62: oil cylinder 64: oil supply passage

66: mass member 68a, 68b: spring

70: oil supply valve assembly 72: oil valve

74: elastic member 76: oil sheet

78: oil cover

The present invention relates to a reciprocating compressor in which a piston sucks and compresses a refrigerant into a compression space while linearly reciprocating inside a cylinder, and then discharges the oil. The oil supply amount is installed on an oil passage for supplying oil between the piston and the cylinder. It relates to an oil supply valve assembly of the reciprocating compressor to adjust the pressure.

In general, a compressor is a mechanical device that increases pressure by receiving power from a power generator such as an electric motor or a turbine to compress air, refrigerant, or various other working gases. It is widely used throughout.

These compressors are classified into a reciprocating compressor which compresses the refrigerant while linearly reciprocating the inside of the cylinder by forming a compression space in which the working gas is absorbed and discharged between the piston and the cylinder. And a rotary compressor for compressing the refrigerant while the roller is eccentrically rotated along the inner wall of the cylinder to form a compression space in which the working gas is sucked and discharged between the eccentrically rotating roller and the cylinder. As a scroll compressor that compresses the refrigerant while the rotating scroll rotates along the fixed scroll to form a compression space in which the working gas is absorbed and discharged between the orbiting scroll and the fixed scroll. Divided.

Recently, among the reciprocating compressors, in particular, the piston is directly connected to the reciprocating linear motion drive motor, so that there is no mechanical loss due to the motion conversion to improve the compression efficiency as well as a simple linear compressor has been developed a lot.

1 is a side cross-sectional view showing a typical reciprocating compressor, Figure 2 is a side sectional view showing an oil supply device of a reciprocating compressor according to the prior art, Figure 3 is an oil supply valve of the reciprocating compressor according to the prior art The exploded perspective view shown.

A typical reciprocating compressor compresses a working fluid such as a refrigerant while the piston reciprocates linearly in a cylinder. FIG. 1 relates to a linear compressor among reciprocating compressors. And a shell (Shell: 2) provided with an outlet pipe (2b) connected thereto, a cylinder (Cylinder: 4) installed inside the shell (2), and a compression space (P) while reciprocating linear motion inside the cylinder (4). A piston (Piston: 6) for sucking and compressing the refrigerant, and being discharged to be fixed to the outside of the cylinder (4), the driving means (10) for reciprocating linear movement of the piston (6), and the compression space ( It is installed at one end of the piston (6) forming the P), the suction valve 22 for sucking the refrigerant into the compression space (P), and one end of the cylinder (4) forming the compression space (P) The refrigerant from the compressed space (P) And a discharge valve assembly 24 for ejecting.

Here, the cylinder 4 is formed in a hollow shape so that the piston 6 can reciprocate linearly therein, and one end of the discharge valve assembly 24 is installed.

Next, the piston 6 has a refrigerant passage 6a formed at the center of the piston 6 so as to allow the refrigerant flowing from the inlet pipe 2a to flow therein, and is inserted into the cylinder 4 to form a compression space P at one side. The suction valve 22 is installed to open and close the refrigerant passage 6a at one end of the compression space P, and the other end is provided by restoring springs 8a and 8b provided in the axial direction. It is elastically supported by the cylinder 4 and a separate support frame 26, respectively.

Next, the driving means 10 is installed to be fixed to the outside of the cylinder 4, a cylindrical inner stator 12 having a plurality of laminations 12a laminated in the circumferential direction, and the inner stator 12. The outer outer stater 14 and the inner stator 12 and the outer stator 14 provided with a predetermined interval on the outer side and having a plurality of laminations 14b laminated on the outer side of the coil 14a in the circumferential direction. The permanent magnet 16 is installed in the space between the (6) and at the same time is connected to the other end of the piston (6) by the mounting member (15).

At this time, the inner stator 12 and the outer stator 14 are installed to be fixed by the frame 18 on the outside of the cylinder 4, the permanent magnet 16 is the mounting member 15 and the piston ( 6) together with the reciprocating linear motion is installed.

Next, the suction valve 22 is formed in a thin plate shape so that the center portion is partially cut to open and close the refrigerant passage 6a at one end side of the piston 6, and one side is at one end of the piston 6. It is installed to be fixed by a screw on.

Next, the discharge valve assembly 24 has a discharge cover 24a installed to form a discharge space O at one end of the cylinder 4 and a discharge installed to open and close one end of the cylinder 4. And a valve spring 24c for providing an elastic force in the axial direction between the valve 24b and the discharge cover 24a and the discharge valve 24b.

At this time, a curved loop pipe 28 is installed between one side of the discharge cover 24a and the outlet pipe 2b to guide the compressed refrigerant to be discharged to the outside as well as the cylinder 4. The vibrations caused by the interaction of the piston 6 and the driving means 10 buffer the transmission of the entire shell 2.

In addition, an oil supply device 30 is installed at the lower side of the frame 18 to supply oil stored in the lower portion of the inner side of the shell 2 between the piston 6 and the cylinder 4. The cylinder 4 is cooled while preventing friction and wear between the cylinder and the cylinder 4.

As described above, the cylinder 4, the piston 4, the driving means 10 and the oil supply device 30 and the like are connected to each other to form an assembly, which is a support spring 29 in the shell (2) It is installed to be supported by a shock absorber such as.

In particular, the conventional oil supply device 30 will be described in more detail with reference to FIG. 2. The oil cylinder 32 communicates with the oil under the shell 2, and oil from the oil cylinder 32. ) And a reciprocating motion between the piston 6 and the cylinder 4 in the oil cylinder 32 and the oil supply passage 34 formed inside the frame 18 for feeding between the piston 6 and the piston 6. A mass member 36 which is moved by an inertial force, a pair of springs 38a and 38b which elastically support both sides of the mass member 36 in the oil cylinder 32, the oil cylinder 32 and oil supply The oil supply valve assembly 40 is installed between the flow path 34 so that oil is supplied by the pressure difference.

Here, the oil cylinder 32 is installed so that one end is fitted into the pressing groove (18h) formed on one side of the frame 18, the pair of springs (38a, 38b) are both sides of the mass member (36) And it is installed to elastically support the indentation groove (18h) and the support end (18a) protruding in a position opposite to the indentation groove (18h), the oil supply valve assembly 40 is the other of the frame 18 It is fixedly installed to be in communication with the oil cylinder 32 and the oil supply passage 34 on the side.

Specifically, the oil supply valve assembly 40 will be described with reference to Figure 3, the oil suction valve 42a is installed on the other side of the frame 18 to suck oil and the oil discharge valve for discharging oil ( Gasket (42) is provided between the plate-shaped oil valve (42) is formed to open and close, the other side of the frame 18 and the circumference of the oil valve 42 to prevent the leakage of oil (gasket) 44 and the oil seat (Oil seat: 46) and the oil cover (Oil cover: 48) are installed so as to overlap each of the outside of the oil valve 42 to form a storage space for temporarily storing oil Is done.

As described above, the oil supply valve assembly 40 has the gasket 44, the oil valve 42, the oil seat 46, and the oil cover 48 sequentially stacked, and then the gasket 44 has the frame 18. The oil supply valve assembly 40 is fixed to the other side of the frame 18 by assembling the screw S in a state of being in close contact with the other side of the).

Of course, the oil suction valve 42a and the oil discharge valve 42b are positioned to communicate with the storage space, and the oil suction valve 42a and the oil discharge valve 42b are the oil cylinder 32 and the storage space. The oil suction passage 34 is opened and closed according to the internal pressure of each oil so that a predetermined amount of oil is supplied.

However, since the oil supply valve assembly of the reciprocating compressor according to the prior art is composed of a gasket 44, an oil valve 42, an oil seat 46, and an oil cover 48, the gasket is not cumbersome to assemble because of a large number of parts. Since the 44 is formed in the shape of a rubber sheet formed to be positioned only at the circumferential portion of the oil valve 42, the fastening force is applied even if the oil supply valve assembly 40 is assembled to the frame 18 with the screw S. (44) As the compressor is operated as it is dispersed as a whole, the tightening force is weakened, so that a space may be generated between the gasket 44 and the frame 18, and thus oil may leak.

The present invention has been made to solve the above problems of the prior art, and an object thereof is to provide an oil supply valve assembly of a reciprocating compressor that can reduce the number of parts.

In addition, an object of the present invention is to provide an oil supply valve assembly of a reciprocating compressor that can prevent the leakage of oil by increasing the tightening force of the fastening portion.

The oil supply valve assembly of the reciprocating compressor according to the present invention for solving the above problems is installed on one side of the assembly consisting of a cylinder, a piston, a driving means in the shell and the oil cylinder in communication with the oil storage unit for storing oil; An oil supply passage for supplying oil from the oil cylinder between the cylinder and the piston, a mass member moving inside the oil cylinder by an inertia force for reciprocating motion between the piston and the cylinder, and both sides of the mass member A pair of springs elastically supported therein and a reciprocating oil supply valve assembly installed between the oil cylinder and the oil supply passage to supply a predetermined amount of oil by the pressure difference between the oil cylinder and the oil supply passage. In the oil supply device of the compressor, the oil supply valve The assembly has a suction valve for sucking oil from the oil cylinder and a discharge valve for discharging oil into the oil supply passage so as to be opened and closed at the center thereof, and an elastic member is coated on one side of the oil cylinder and the oil supply passage. A seat-shaped oil valve fixed to the seat, one side of the oil valve is installed in contact with the other surface of the oil valve (sheet-shaped oil seat with a plurality of storage holes formed), and the oil One surface is installed in contact with the other surface of the sheet is characterized in that consisting of a sheet-shaped oil cover (Oil cover) formed with a plurality of storage grooves to form a storage space for temporarily storing the oil between the storage hole and the storage hole. It is done.

In the present invention, the oil cylinder and the oil supply passage is in communication with one side of the frame is inserted into the cylinder, the oil supply valve assembly is characterized in that it is installed on the other side of the frame.

In the present invention, the oil valve is formed with a groove to protrude toward the frame side to the circumferential portion to which the elastic member is attached to prevent the leakage of oil, the oil valve and the oil seat and the oil cover is preferably laminated. .

In the present invention, the elastic member is more preferably rubber.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a side sectional view showing an oil supply device of the reciprocating compressor according to the present invention, Figure 5 is an exploded perspective view showing an oil supply valve of the reciprocating compressor according to the present invention.

The oil supply device of the reciprocating compressor according to the present invention is a cylindrical oil cylinder 62 through which the oil stored in the inner bottom surface of the shell (not shown) flows through the suction pipe 62a as shown in FIG. 4. And an oil supply passage 64 installed to communicate with the oil cylinder 62 to supply oil from the oil cylinder 62 between the pistons reciprocating inside the cylinder, and the piston inside the oil cylinder 62. A mass member 66 reciprocating linearly by the inertial force of the reciprocating motion between the cylinder and the cylinder, and a pair of springs 68a and 68b that elastically support both sides of the mass member 66 in the oil cylinder 62. And an oil supply valve assembly 70 installed between the oil cylinder 62 and the oil supply passage 64 to supply oil by a pressure difference.

Of course, in the shell, an assembly consisting of a piston, a cylinder, a driving means, and a frame 58 installed to support one end surface of the driving means on the outside of the cylinder is installed so as to buffer and support the oil under the shell. An oil supply device configured as described above to be supplied between the piston and the cylinder is installed below the assembly.

Here, the oil cylinder 62 is installed so that one end is fitted into the ring-shaped indentation groove (58h) formed on one side of the frame 58, the suction pipe (62a) is connected to the lower side and stored in the inner bottom surface of the shell The oil is introduced into the oil cylinder 62, and a portion of the frame 58 in which the oil cylinder 62 is installed is formed to penetrate to the other side so that oil can pass therethrough.

Next, the oil supply passage 64 is formed to be connected between the cylinder and the piston inside the frame 58 so as to penetrate the other side of the frame 58 or to penetrate the other side of the frame 58. One side of the frame 58 may be installed as a separate member.

Of course, the frame 58 is formed so as to communicate with the oil cylinder 62 and the oil supply passage (64).

Next, the mass member 66 is installed to reciprocate in the axial direction of the oil cylinder 62. As the mass member 66 reciprocates linearly in the oil cylinder 62, the oil cylinder (66) As the pressure inside changes, oil flows into the oil cylinder 66 through the suction pipe 62a.

Next, the pair of springs 68s and 68b are installed to be elastically supported at both ends of the mass member 66, respectively, and one spring 68a is provided at one end of the mass member 66 and the press-in groove 58h. ) And the other spring 68b is elastically supported by the other end of the mass member 66 and the support end 58a formed to protrude below the frame 58.

At this time, a hole (h) is formed inside the press-in groove (58h) so that oil can communicate, the hole (h) has a diameter smaller than the diameter of the spring (68a) to the spring (68a) Support it.

Next, the suction valve assembly 70 is fixedly installed on the other side of the frame 58 so as to communicate with the oil cylinder 62 and the oil supply passage 64. Specifically, referring to FIG. The oil suction valve 72a for sucking the oil and the oil discharge valve 72b for discharging the oil are formed to be opened and closed at the center and the plate-shaped oil valve coated with the elastic member 74 in the circumferential portion thereof. And an oil seat (Oil seat: 76) and an oil cover (Oil cover: 78) which are installed to overlap each other on the outside of the oil valve 72 to form a storage space in which oil can be temporarily stored.

In particular, the oil valve 72 is formed in a metal plate shape and is formed so that the oil suction valve 72a and the oil discharge valve 72b are partially cut in the front and rear directions, respectively, in the lower and upper centers thereof. 58, an elastic member 74 is coated on the circumferential portions of the oil suction valve 72a and the oil discharge valve 72b, and the frame 58 is coated on the portion where the elastic member 74 is coated. Grooves 74a are formed to protrude to one surface in contact with each other.

At this time, the elastic member 74 is a member having an elastic force of a predetermined size or more, rubber may be applied.

Next, the valve seat 76 is formed in a metal plate shape, and is formed to be blocked by the first suction storage hole 76ih and the suction oil valve 72a formed to communicate with the oil cylinder 62 at the lower side. A second suction storage hole 76ih 'is formed, and a discharge storage hole 76oh is formed to be in communication with the oil supply passage 64 and to be blocked by the discharge oil valve 72b. .

Of course, the oil valve 72 also allows the hole 72h to be formed in communication with the first suction storage hole 76ih of the valve seat.

Next, when the valve cover 78 is stacked on the valve seat 76, the suction storage groove 78ih is formed at the portion where the first and second suction storage holes 76ih and 76ih 'are positioned, and the discharge is performed. The discharge storage grooves 78oh are formed to be partitioned with each other at a portion where the storage hole 76oh is located, and the suction storage groove 78ih and the discharge storage groove 78oh are opposite to the surface contacting the valve seat 76. It is formed so as to protrude.

The oil supply valve assembly 70 configured as described above has the oil valve 72, the oil seat 76, and the oil cover 78 sequentially stacked, and then the elastic member 74 at the oil valve 72. Is attached to the frame 58 through the oil valve 72, the oil seat 76, the oil cover 78 in a state where the surface is in close contact with the other side of the frame 58.

In this case, since the groove 74a is formed to protrude toward the frame 58 at the portion where the elastic member 74 is attached, the oil valve 72 concentrates the fastening force of the screw on the groove 74a. Since the groove 74a is fixed to be in close contact with the frame 58, leakage of oil may be prevented.

As described above, the operation state of the oil supply device in which the oil supply valve assembly 70 is assembled to communicate with the oil cylinder 62 and the oil supply flow path 64 is reciprocated in the cylinder by the driving means. The mass member 66 moves inside the oil cylinder 62 by the inertial force generated by the linear movement, and the mass member 66 is installed so that both sides are supported by a pair of springs 68a and 68b. As a result, the mass member 66 reciprocates linearly in the oil cylinder 62. As the mass member 66 reciprocates linearly in the oil cylinder 62, the inside of the oil cylinder 62. At the same time the volume is variable and the pressure is variable.

At this time, when the pressure of one side of the oil cylinder 62 connected to the suction pipe 62a is reduced while the mass member 66 is reciprocated linearly, the oil is sucked through the suction pipe 62a, and the suction pipe 62a is provided. When the pressure of one side of the oil cylinder 62 connected to the pressure increases, the oil inside the oil cylinder 62 flows into the oil supply valve assembly 70 in a predetermined amount.

Of course, when the pressure of one side of the oil cylinder 62 increases, the oil supply valve assembly 70 also opens the suction valve 72a toward the storage space as the pressure of the storage space decreases. Oil flows into the storage space, and the oil in the storage space is also opened toward the oil supply passage 64 as the oil discharge valve 72b is opened by the pressure difference between the storage space and the oil supply passage 64. Inflow.

The oil introduced into the oil supply passage 64 is supplied between the piston and the cylinder along the oil supply passage 64 by a capillary phenomenon, thereby preventing friction and wear between the piston and the cylinder. Allow the cylinder to cool.

The oil supply valve assembly of the reciprocating compressor according to the present invention constituted as described above has the advantage that the number of parts can be easily reduced because the elastic member is coated with the oil valve, the oil seat, and the oil cover to be stacked. have.

In addition, since the oil supply valve assembly of the reciprocating compressor according to the present invention allows the groove to be formed on the oil valve coated with the elastic member, the oil valve, the oil seat, and the oil cover are laminated to the screw assembly so that the screw tightening force of the groove is Supported by the not only can increase the tightening force but also has the advantage of preventing the leakage of oil even after the operation time.

Claims (4)

An oil cylinder installed at one side of the assembly including a cylinder, a piston, and a driving means in the shell to communicate with an oil storage unit for storing oil; An oil supply passage for supplying oil from the oil cylinder between the cylinder and the piston; A mass member moving inside the oil cylinder by an inertia force for reciprocating motion between the piston and the cylinder; A pair of springs elastically supporting both sides of the mass member in the oil cylinder; In the oil supply device of the reciprocating compressor comprising an oil supply valve assembly which is installed between the oil cylinder and the oil supply passage to supply a predetermined amount of oil by the pressure difference between the oil cylinder and the oil supply passage, The oil supply valve assembly is: An elastic member is coated on a circumference of one surface, and a suction valve for sucking oil from the oil cylinder and a discharge valve for discharging oil to the oil supply passage are formed to be opened and closed at the center thereof, and are in close contact with the oil cylinder and the oil supply passage. Seated oil valve (Sheet) oil valve (Oil valve), A seat-shaped oil seat (Oil seat) having a plurality of storage holes formed to be in contact with another surface of the oil valve, One surface is installed in contact with the other surface of the oil sheet is made of a sheet-shaped oil cover (Oil cover) formed with a plurality of storage grooves to form a storage space for temporarily storing oil between the storage hole and the Oil supply valve assembly of the reciprocating compressor, characterized in that. The method of claim 1, The oil cylinder and the oil supply passage is in communication with one side of the frame into which the cylinder is inserted, the oil supply valve assembly of the reciprocating compressor, characterized in that the oil supply valve assembly is installed on the other side of the frame. The method of claim 2, The oil valve has a groove formed to protrude to the frame side on the circumferential portion to which the elastic member is attached, and the oil valve, the oil seat and the oil cover are stacked and screw-assembled to the frame. Supply valve assembly. The method according to any one of claims 1 to 3, The oil supply valve assembly of the reciprocating compressor, characterized in that the elastic member is rubber.

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