KR100597299B1 - Oil pumping apparatus of reciprocating compressor - Google Patents

Abstract

The present invention relates to an oil supply apparatus of a reciprocating compressor in which oil is supplied between a piston and a cylinder in a reciprocating compressor for discharging and then compressing a refrigerant into a compression space while the piston is linearly reciprocating in a cylinder. In particular, the present invention relates to an oil supply device for a reciprocating compressor that can easily process and assemble components.

The oil supply device of the reciprocating compressor according to the present invention includes an oil supply flow path, an oil cylinder, a mass member, and a pair of springs, but the cross-sectional area of the oil cylinder in an open portion of the frame to which the oil cylinder is connected. The support member is formed to be large and has a hole formed therein so that oil can pass therethrough, and the oil cylinder and the frame are integrated because the mass member is installed to be elastically supported to the support member by the spring inside the oil cylinder. Not only is it easy to process, but the assembly time can be shortened by not having to assemble the oil cylinder to the frame separately.

Reciprocating compressors, cylinders, pistons, oil supply units, frames, oil cylinders

Description

Oil supply device of reciprocating compressor {OIL PUMPING APPARATUS 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 a side sectional view showing a first embodiment of an oil supply device of a reciprocating compressor according to the present invention;

Figure 4 is a side sectional view showing a second embodiment of the oil supply device of the reciprocating compressor according to the present invention.

<Explanation of symbols on main parts of the drawings>

48A: first frame 48B: second frame

48a: support end 48h: seating groove

52: oil cylinder 54: oil supply passage

56 mass member 58a, 58b spring

60: oil supply valve assembly 70: support member

70h: hall

The present invention relates to an oil supply apparatus of a reciprocating compressor in which oil is supplied between a piston and a cylinder in a reciprocating compressor for discharging and then compressing a refrigerant into a compression space while the piston is linearly reciprocating in a cylinder. In particular, the present invention relates to an oil supply device for a reciprocating compressor that can easily process and assemble components.

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 the piston reciprocates linearly inside 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.

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.

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.

On the other hand, the lower side of the frame 18, as shown in Figure 2 is an oil supply device 30 for supplying the oil stored in the inner bottom of the shell (2) between the piston (6) and the cylinder (4) Installed to prevent friction and abrasion between the piston 6 and the cylinder 4 while allowing the cylinder 4 to cool.

In detail, the oil supply device 30 supplies an oil cylinder 32 communicating with oil under the shell 2 and oil from the oil cylinder 32 between the cylinder 4 and the piston 6. The mass member 36 which is moved by the inertia force for the reciprocating motion between the piston 6 and the cylinder 4 inside the oil cylinder 32 and the oil supply passage 34 formed inside the frame 18 to And a pair of springs 38a and 38b for elastically supporting both sides of the mass member 36 in the oil cylinder 32, and between the oil cylinder 32 and the oil supply passage 34. It consists of an oil supply valve assembly 40 for supplying oil by the pressure difference.

Here, the oil cylinder 32 has a cylindrical shape so that one end is inserted into the press-fit groove 18h formed on one side of the frame 18, and the pair of springs 38a and 38b are formed by the mass member ( 36 is installed to be elastically supported at both sides of the press-in groove 18h and the support end 18a protruding at a position opposite to the press-in groove 18h, and the oil supply valve assembly 40 is formed in the frame ( On the other side of 18) is fixedly installed so as to communicate with the oil cylinder 32 and the oil supply passage 34.

At this time, the frame 18 supports one end of the cylinder 4 and the inner stator 12 and has a first frame 18A having an inner portion of the oil supply passage 34 formed therein, and the outer stator ( 14 is supported so as to maintain a predetermined gap with the inner stator 12, and is divided into a second frame 18B in which the oil cylinder 32 is installed at the lower side thereof, and is installed to be assembled with each other.

The oil supply device 30 assembled as described above is connected to the piston 6 by an inertial force generated as the piston 6 is driven by the driving means 10 and reciprocally linearly moved inside the cylinder 4. The oil is supplied between the cylinders 4, which prevents friction and wear between the piston 6 and the cylinders 4 and cools the cylinders 4.

However, since the oil supply device as described above is installed so that one end of the oil cylinder 32 is press-fitted into the press-in groove 18h of the frame, the oil supply device is inserted into the press-in groove 18h of the oil cylinder 32 and the frame during assembly. Since the deformation or damage may occur, the oil cylinder 32 and the first frame 18A may be integrally processed to reduce the deformation or damage of such components.

At this time, the oil cylinder 32 is integrally injection-molded in the first frame 18A, and a hole is machined in the oil cylinder 32, and then the oil cylinder (3) is formed in the first frame 18A. A hole smaller than the hole of the oil cylinder 32 may be penetrated so that the spring 38a can be supported in a direction opposite to the portion connected to the 32.

However, as described above, the oil supply device of the reciprocating compressor according to the related art forms the oil cylinder 32 and the frame 18A integrally, and the spring 38a is elastically supported inside the oil cylinder 32. In the case where the hole is stepped or polished inside the step, precision machining is required, which causes difficulty in processing and increases production costs as the number of machining increases.

The present invention has been made in order to solve the above problems of the prior art, the oil cylinder and the frame is integrally formed, as well as to support the spring installed inside the oil cylinder without any additional precision processing to increase the production cost It is an object of the present invention to provide an oil supply device for a reciprocating compressor that can be reduced.

The oil supply device of the reciprocating compressor according to the present invention for solving the above problems is provided with a cylinder, a piston, a driving means, an oil supply device is connected to the inside of the shell and the piston inside the cylinder as the driving means is operated. In the reciprocating compressor to compress the refrigerant while reciprocating linear movement, the oil supply device is operated by the inertial force generated during the reciprocating linear movement of the piston so that the oil is supplied between the cylinder and the piston, the oil supply device is oil One end of the supply passage, an oil cylinder which is inserted into the cylinder and integrally formed on one side of the frame supporting one end of the driving means to supply oil to the oil supply passage, and one end of the oil cylinder opened to the other side of the frame. And larger than the cross-sectional area of the oil cylinder to prevent A support member having a hole formed therein so as to allow oil to pass therethrough, 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 being supported by the support end of the oil cylinder and the Characterized in that consisting of a pair of springs elastically supported on the support member.

In the present invention, the support member is preferably a plate formed in the hole formed in the center smaller than the diameter of the spring.

At this time, the support member is located on the other side of the frame in communication with one end of the oil cylinder, the oil supply valve assembly is installed to communicate with the oil supply passage and the oil cylinder on the outside of the support member to open and close the oil supply operation Is preferably fixed to the frame.

In addition, a mounting groove formed on the other side of the frame connected to one end of the oil cylinder is larger than the cross-sectional area of the oil cylinder is formed, it is more preferable that the support member is seated in the mounting groove.

At this time, the support member is seated in the seating groove, the oil supply valve assembly which is installed to communicate with the oil supply passage and the oil cylinder on the outside of the support member to open and close the oil supply is preferably fixed to the frame. Do.

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

3 and 4 are side cross-sectional views showing the first and second embodiments of the oil supply device of the reciprocating compressor according to the present invention.

The first embodiment of the oil supply device of the reciprocating compressor according to the present invention is also similar to the oil supply device of the conventional reciprocating compressor, and the cylinder 4, the piston 6, the driving means 10 inside the shell 2. It is installed to be fixed to the lower side of the assembly, specifically, as shown in Figure 3 is installed in the frame (48A, 48B) is installed so as to support the one end of the drive means 10 at the same time the cylinder 4 is penetrated A cylindrical oil cylinder 52 which is formed integrally and flows oil stored in the inner bottom surface of the shell 2 by a pressure difference, and oil is transferred from the oil cylinder 52 to the cylinder 4 and the piston 6. Reciprocating by the inertia force for the reciprocating motion between the cylinder 4 and the piston 6 in the oil cylinder 52 and the oil supply passage 54 installed to communicate with the oil cylinder 52 for supplying between Linear movement A mass member 56, a pair of springs 58a and 58b elastically supporting both sides of the mass member 56 in the oil cylinder 52, the oil cylinder 52 and the oil supply passage 54 It is provided between the oil supply valve assembly 60 is installed between the oil is supplied by the pressure difference.

In this case, reference numerals not shown will be described with reference to FIG. 1.

Here, the frames 48A and 48B support one end of the cylinder 4 and the inner stator 12 and the first frame 48A having an inner portion of the oil supply passage 54 formed therein, and the outer The stator 14 is divided into a second frame 48B for supporting a predetermined gap with the inner stator 12 and installed to be assembled with each other.

At this time, the oil cylinder 52 is integrally formed under the first frame 48A. One end of the oil cylinder 52 is connected to the first frame 48A so that a hole having a predetermined diameter penetrates therein. In addition, the opening portion of the first frame 48A is formed to be larger than the cross-sectional area of the oil cylinder 52 so as to block one end of the oil cylinder 52 and to allow oil to pass therethrough. 70h) is installed to fix the plate-shaped support member 70, and when the second frame 48B is assembled to the first frame 48A below the second frame 48B, the oil cylinder ( A support end 48a which is positioned at a predetermined distance from the other end of the 52 is formed.

Next, the oil supply passage 54 may be formed to penetrate inside the first frame 48A, or a separate member may be installed, and the cylinder 4 may be formed from the oil cylinder 4. It is installed in communication therebetween so that oil is supplied between the pistons 6.

Next, the mass member 56 is a member having a predetermined mass, one end of which is elastically supported by the pair of springs 58a and 58b and the other end of which is supported by the support end 48a. It is installed to be elastically supported.

Next, the pair of springs (58a, 58b) is a kind of coil spring that elastically supports the mass member 56, one spring (58a) between one end of the mass member 56 and the support member 70 The other spring 58b is installed to be elastically supported between the other end of the mass member 56 and the support end 48a.

Next, the oil supply valve assembly 60 is installed on a surface (opposite surface) opposite to one surface in which the oil cylinder 52 is integrally formed in the first frame 48A. The opposite surface is installed to communicate with the hole communicating with the oil cylinder 52 and the end of the oil supply passage 54 to adjust the supply amount of oil.

In this case, the oil supply valve assembly 60 is tightly fixed to the first frame 48A to prevent oil from leaking from the oil cylinder 52 and the oil supply passage 54, and the gasket. An oil suction valve (not shown) closely fixed to the rear surface of the oil cylinder (52) and an oil discharge valve (not shown) for discharging oil into the oil supply passage (54) are formed. An oil seat sequentially stacked on the valve 64 and the rear surface of the oil valve 64 to form a storage space in which oil sucked through the oil suction valve is temporarily stored before being discharged through the oil discharge valve ( 66) and an oil cover 68, and thus the gasket 62, the oil valve 64, the oil seat 66, and the oil cover 68 are sequentially stacked on the first frame 48B. Assemble by screw (S) together with support member (70) The.

Of course, the support member 70 is installed between the first frame 48A and the oil supply valve assembly 60, and the hole 70h of the support member and the oil suction valve are provided to supply oil. It is preferable to be installed so as to communicate with, and when the support member 70 is installed to block the oil supply passage 54 it is to form a hole in communication with the oil discharge valve and the oil supply passage 54 separately. desirable.

On the other hand, the second embodiment of the oil supply device of the reciprocating compressor according to the present invention is also configured as in the first embodiment, so that the support member 70 can be seated on the first frame 48A. A seating groove 48h is formed on an opposite surface of the first frame 48A, and the oil supply valve assembly 60 is configured to cover the support member 70 on the outside of the seating groove 48h. Screw (S) is assembled to 48A).

Here, since the support member 70 is formed larger than the hole of the oil cylinder 52, the seating groove 48h is also formed larger than the hole of the oil cylinder 52, the plate in the center A hole 70 is formed to communicate with the oil cylinder 52 and the oil suction valve.

Of course, when the support member 70 is seated in the seating groove 48h of the first frame, the opposing surfaces of the support member 70 and the first frame 48A form the same plane so as to form the oil supply valve assembly. 60 covers the support member 70 and is screwed to the opposite surface of the first frame 48A.

Looking at the assembly process of the oil supply device of the reciprocating compressor according to the present invention configured as described above, the cylinder 52 and the inner stator () is assembled to the first frame 48A, the first frame 48A The mass member 56 is fitted inside the oil cylinder 52 integrally formed at the lower side of the oil cylinder 52, and a pair of springs 58a and 58b are fitted to both sides of the mass member 56. Then, the first frame 48A The support member 70 and the oil supply valve assembly 60 are screw-assembled in a portion communicating with the spring) so that one spring 58a is elastically supported between the mass member 56 and the support member 70. .

In addition, after the outer stator 14 is assembled to the second frame 48B, the assembly of the second frame 48B is assembled to the assembly of the first frame 48A, and the inner stator 12 And the outer stator 14 are assembled to maintain a predetermined interval, and the other spring 58b is elastically supported on the support end 48a formed on the lower side of the second frame 48B.

In this case, referring to a process in which the first frame 48A and the oil cylinder 52 are integrally formed, the oil cylinder 52 is integrally injection molded in the first frame 48A, and the oil cylinder 52 is formed. A hole having a predetermined diameter to penetrate the first frame 48A, and then open an open surface of the first frame 48A to elastically support the spring 58a installed therein. A separate support member 70 is installed to be fixed together with the oil supply valve assembly 60.

Therefore, since the first frame 48A and the oil cylinder 52 are integrally formed, it is possible to prevent breakage and deformation occurring during the assembling process separately, thereby increasing the reliability of the product, as well as the first frame 48A. ) And the oil cylinder 52, because only a single drilling process is required, not only the processing is easy but also the number of times of processing can be reduced, thereby reducing the production cost.

Meanwhile, the first frame 48A and the oil cylinder 52 are integrally formed, and a hole having a constant diameter is drilled inside the oil cylinder 52, and then the open portion of the first frame 48A is formed. The support member 70 is formed in the seating groove 48h so as to process the seating groove 48h having a diameter larger than that of the hole of the oil cylinder 52 and elastically support the spring 58a installed therein. It is fixedly installed by the oil supply valve assembly 60 to be seated.

At this time, since the seating groove 48h in the first frame 48A and the oil cylinder 52 is processed to have a larger diameter than the hole of the oil cylinder, it is easy to process the support member 70. The size of the product can be reduced because it is installed to be seated inside the first frame 48A.

Since the oil supply device of the reciprocating compressor according to the present invention configured as described above is provided with an oil cylinder and a frame integrally, a support member for preventing oil from passing through one end of the oil cylinder communicating with the frame is installed. It can reduce the damage and deformation of parts generated during the oil cylinder and frame assembly process, thereby increasing the reliability of the product and reducing the production cost because the spring installed inside the oil cylinder is supported by the support member without any additional precision processing. There is an advantage to this.

Claims (5)

A cylinder, a piston, a driving means, a first frame and a second frame for supporting the driving means, and an oil supply device are connected and installed in the shell, so that the piston reciprocates linearly in the cylinder as the driving means is operated. In the reciprocating compressor to compress the refrigerant, the oil supply device is operated by the inertial force generated during the reciprocating linear motion of the piston so that the oil is supplied between the cylinder and the piston, The oil supply device and the oil supply passage, An oil cylinder in which the cylinder is inserted and integrally formed in a first frame supporting one end of the driving means to supply oil to the oil supply passage, and both ends of which are open; Located at one end of the oil cylinder, the support member is formed to be larger than the cross-sectional area of the oil cylinder to block one end of the open oil cylinder and the hole is formed so that the oil can pass through the center, A support end provided at a second frame and spaced apart from the other end of the oil cylinder; A mass member moving inside the oil cylinder by an inertial force for reciprocating motion between the piston and the cylinder; Oil supply device of the reciprocating compressor comprising a pair of springs elastically supporting both sides of the mass member to the support end and the support member. The method of claim 1, The support member is an oil supply device of the reciprocating compressor, characterized in that the hole formed in the center is a plate formed smaller than the diameter of the spring. The method according to claim 1 or 2, The support member is located on the other side of the frame in communication with one end of the oil cylinder, the oil supply valve assembly is installed to communicate with the oil supply passage and the oil cylinder on the outside of the support member to open and close the oil supply operation Oil supply device of the reciprocating compressor, characterized in that fixed to the frame. The method of claim 1, Oiling device of the reciprocating compressor, characterized in that the mounting groove formed on the other side of the frame connected to one end of the oil cylinder is formed larger than the cross-sectional area of the oil cylinder, the support member is seated in the mounting groove. The method of claim 4, wherein The support member is seated in the seating groove, the oil supply valve assembly is installed on the outside of the support member in communication with the oil supply passage and the oil cylinder to open and close the oil supply valve is fixed to the frame Oil supply device of the reciprocating compressor.

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