KR100492614B1 - Oil feeder for reciprocating compressor - Google Patents

Abstract

The present invention relates to a lubricating oil supply device for a reciprocating compressor, and the present invention has a casing filled with lubricating oil on its bottom surface and a reciprocating motor in which the mover linearly reciprocates, and a piston coupled to the mover of the reciprocating motor includes: The compressor main body compresses the refrigerant gas while linearly reciprocating in the cylinder, and is arranged to be immersed in the casing lubricating oil by opening in a direction coinciding with the vibration direction of the compressor main body. A lubricating oil suction pipe which forms a flow path resistance part and vibrates with the compressor main body while sucking the lubricating oil of the casing, and a lubricating oil guide part which communicates the lubricating oil suction pipe between the cylinder and the piston of the compressor main body, simplifying the configuration of the lubricating oil supply device. Reduce the number and simplify assembly W it is possible to increase the productivity of the reciprocating compressor. Further, by opening both ends of the lubricating oil suction pipe and forming a flow path resistance portion at both ends, the lubricating oil can be remarkably increased by allowing the lubricating oil to be sucked twice each time the lubricating oil suction pipe is reciprocated once.

Description

Lubricant supply device for reciprocating compressors {OIL FEEDER FOR RECIPROCATING COMPRESSOR}

The present invention relates to a lubricating oil supply device for pumping and supplying lubricating oil in a reciprocating compressor. More particularly, the present invention relates to a lubricating oil supplying device of a reciprocating compressor that enables pumping using the inertial force of the lubricating oil.

In general, a reciprocating compressor suctions and compresses gas while the piston moves linearly. Such a reciprocating compressor converts the rotational motion of the drive motor into a reciprocating motion of the piston and sucks and compresses the gas. There is a method of inhaling and compressing gas by reciprocating the piston while reciprocating.

1 is a longitudinal sectional view showing an example of a conventional reciprocating compressor belonging to the latter, as shown in the conventional reciprocating compressor is filled with a certain amount of lubricating oil on the bottom surface and the gas suction pipe (SP) and gas discharge pipe (DP) communication; A casing 10 to be installed, a frame unit 20 elastically installed in the casing 10, and a reciprocating motor in which the mover 33 reciprocates linearly by being fixed to the frame unit 20 ( 30, a compression unit 40 coupled to the mover 33 of the reciprocating motor 30 and supported by the frame unit 20, and the mover 33 of the reciprocating motor 30. To a resonant spring unit 50 that elastically supports in a direction to induce a resonant motion, and a lube oil supply unit 60 mounted on the frame unit 20 to pump the lubricant oil of the casing 10 to the sliding portion of the compression unit 40. It consists.

The frame unit 20 supports the compression unit 40 and the front frame 21 supporting the front side of the reciprocating motor 30 and the rear side of the reciprocating motor 30 by being coupled to the front frame 21. Intermediate frame 22 for supporting the, and the rear frame 23 is coupled to the intermediate frame 22 to support the resonant spring unit.

The reciprocating motor 30 has an outer stator 31 installed between the front frame 21 and the intermediate frame 22 and a cylinder fixed to the front frame 21 by being coupled to the outer stator 31 at a predetermined interval ( The inner stator 32 is inserted into and installed in 41, and the movable part 33 is installed between the outer stator 31 and the inner stator 32 to reciprocate in a straight line.

The compression unit 40 is coupled to the cylinder 41 fixedly installed at the front frame 21 and the mover 33 of the reciprocating motor 30 to reciprocate in the compression space P of the cylinder 41. A suction valve 43 for limiting suction of refrigerant gas while opening and closing the suction flow path F of the piston 42 and the piston 42, and the discharge side of the cylinder 41. And a discharge valve assembly 44 mounted on the discharge space to limit the discharge of the compressed gas while opening and closing the compression space P.

The resonant spring unit 50 includes a front resonant spring 51 for supporting the front side of the connecting part, and a rear resonant spring for supporting the rear side of the connecting part, centering on the connecting part of the mover 33 and the piston 42. It consists of 52.

The lubricating oil supply unit 60 is mounted on the lower half of the frame unit 20 and vibrates with the frame unit 20 to pump the lubricating oil of the casing 10 and the lubricating oil pumping unit 61. It consists of a lubricating oil supply passage 62 formed in the frame unit 20 so as to communicate the outlet side of the compression unit 40.

Lubricating oil pumping part 61 is a lubricant cylinder 61A to be mounted on the outer peripheral surface of the lower half of the front frame 21 as shown in Figs. 2A and 2B, and a lubricant suction cover 61B to be mounted on both front and rear sides of the lubricant cylinder 61A. And a lubricating oil discharge cover 61C, a lubricating oil piston 61D which is slidably inserted into the lubricating oil cylinder 61A, penetrates the lubricating oil hole h therein, and pumps the lubricating oil, and the lubricating oil piston 61D. Lubricating oil springs 61E and 61E that elastically support both ends, and a lubricant suction valve 61F and a lubricant discharge valve mounted between the front frame 21 and the lubricant discharge cover 61C to restrict the suction and discharge of the lubricant. It consists of (61G)

In the figure, reference numeral 61H denotes a lubricating oil suction pipe.

The conventional reciprocating compressor as described above operates as follows.

That is, when a flux is formed between the outer stator 31 and the inner stator 32 by applying power to the reciprocating motor 30, the gap between the outer stator 31 and the inner stator 32 is formed. As the placed mover 33 moves in the direction of the flux, the reciprocating motion is continuously reciprocated by the resonant spring unit 50, and together with the piston 42 reciprocating in the cylinder 41, the compression space P ), The refrigerant gas is sucked and compressed into the compression space, and then discharged. During this process, the lubricant pumping unit 61 vibrates with the frame unit 20 while pumping and compressing the lubricant inside the casing 10. After the supply to the unit 40 is repeated a series of steps to recover to the casing.

First, as shown in FIG. 2A, when the lubricant cylinder 61A moves in the direction "A" of the figure, the lubricant piston 22 moves in the opposite direction with respect to the lubricant cylinder 21, and thus the front volume of the lubricant piston 61D. As the pressure widens, the lubricant suction valve 61F opens and the lubricant discharge valve 61G opens, so that the new lubricant oil of the casing 10 opens the lubricant hole h of the lubricant suction pipe 61H and the lubricant piston 61D. It fills in the front side of the said lubricating oil cylinder 61A via.

Next, as shown in FIG. 2B, when the lubricant cylinder 61A moves in the direction “B” of the drawing, the lubricant piston 61D moves in the opposite direction with respect to the lubricant cylinder 61A, and the lubricant suction valve 61F is closed and the lubricant oil. The discharge valve 61G opens and pushes out the front lubricant of the lubricant cylinder 61A, which passes through the lubricant discharge valve 61G and passes through the lubricant oil supply passage 62 of the compression unit 40. It was supplied to the sliding portion between the cylinder 41 and the piston 42.

However, in the lubricating oil supply device of the conventional reciprocating compressor as described above, the lubricating oil pumping unit 61 has a number of parts and a complicated structure, which makes assembly difficult, low productivity, and excessive manufacturing cost.

In addition, since one side of the lubricating oil cylinder 61A is configured as the suction side and the other side as the discharge side, the lubricating oil is pumped only once each time the reciprocating vibration of the frame unit 20 is performed.

The present invention has been made in view of the above problems of the lubricating oil supply device of the conventional reciprocating compressor, and provides a lubricating oil supply device of the reciprocating compressor that can increase the productivity and reduce the manufacturing cost by simplifying the structure of the lubricating oil pumping unit. There is an object of the present invention.

Another object of the present invention is to provide a lubricating oil supply device of a reciprocating compressor capable of pumping lubricating oil at least once each time the frame unit reciprocates once.

In order to achieve the object of the present invention, a piston having a casing filled with lubricating oil and a reciprocating motor in which the mover reciprocates in a straight line, and a piston coupled to the mover of the reciprocating motor is reciprocated in a straight line inside the cylinder. Compressor body for compressing the refrigerant gas and opening in the direction corresponding to the vibration direction of the compressor body to be immersed in the lubricating oil of the casing, but at least one end of the flow path resistance portion is formed narrower toward the inside of the compressor Provided is a lubricating oil supply device for a reciprocating compressor including a lubricating oil suction pipe that vibrates with the main body and sucks lubricating oil of the casing, and a lubricating oil guide portion communicating an intermediate portion of the lubricating oil suction pipe between the cylinder and the piston of the compressor main body.

EMBODIMENT OF THE INVENTION Hereinafter, the lubricating oil supply apparatus of the reciprocating compressor by this invention is demonstrated in detail based on one Example shown in an accompanying drawing.

Figure 3 is a longitudinal cross-sectional view showing an example of the reciprocating compressor of the present invention, Figure 4 is a perspective view showing the lubricating oil supply device of the present invention, Figures 5a and 5b is a longitudinal sectional view showing the operation of the lubricating oil supply device of the present invention. .

As shown in the drawing, the reciprocating compressor including the lubricating oil supply device according to the present invention includes a casing 10 filled with a predetermined amount of lubricating oil, a frame unit 20 elastically installed in the casing 10, and A reciprocating motor 30 fixed to the frame unit 20, a compression unit 40 for compressing refrigerant gas while reciprocating together with the reciprocating motor 30, and a resonant motion of the compression unit 40. It comprises a resonant spring unit (50) for holding a and a lubricating oil supply unit (100) attached to the frame unit 20 to suck the lubricant of the casing (10) into the sliding portion of the compression unit (40).

The frame unit 20 supports the cylinder 41 of the compression unit 40 and supports the front frame 21 supporting the front side of the reciprocating motor 30 and the rear side of the reciprocating motor 30. The intermediate frame 22 is coupled to the front frame 21 by the support, and the rear frame 23 is coupled to the intermediate frame 22 to support the resonance spring unit 50.

The reciprocating motor 130 has an outer stator 131 and an inner stator 132 fixed to the front frame 21 and the intermediate frame 23 with a predetermined gap therebetween, and an outer stator 31 and an inner stator 32. It consists of a movable element 33 interposed so as to make a linear reciprocating motion therebetween.

As described above, the compression unit 40 is inserted into the cylinder 41 fixed to the front frame 21 and slides into the cylinder 41 and coupled to the mover 33 of the reciprocating motor 30. The piston 42 reciprocating together, the suction valve 43 attached to the front end surface of the piston 42 to open and close the suction flow path F, and the discharge side of the cylinder 41 to discharge the compressed gas. It consists of a discharge valve assembly (44) to adjust.

The resonant spring unit 50 includes a front resonant spring 51 for supporting the front side of the connecting part, and a rear resonant spring for supporting the rear side of the connecting part, centering on the connecting part of the mover 33 and the piston 42. Consists of 52.

The lubricating oil supply unit 100 is mounted on the lower half of the frame unit 20 and vibrates with the frame unit 20 to suck the lubricating oil of the casing 10, and the lubricating oil suction unit 110. It consists of a lubricating oil supply passage portion 120 for supplying the lubricating oil sucked in to the sliding portion of the compression unit 40.

The lubricating oil suction part 110 is provided at both inlet sides of the lubricating oil suction pipe 111 formed by opening both ends in the vibration direction of the piston (front and rear linear direction in the drawing), as shown in FIG. Lubricant guide pipes (112A) and (112B) forming a flow path of the lubricating oil and at the same time forming a flow resistance, and a lubricating oil connecting pipe (113) connecting the intermediate portion of the lubricating oil suction pipe (111) to the lubricating oil supply passage (120). .

The lubricating oil suction pipe 111 is provided in a hollow cylindrical shape having the same diameter and forms a lubricating oil discharge hole 111a communicating with the lubricating oil connecting pipe 113 above the middle portion thereof.

The lubricant guide pipes 112A and 112B are formed in a truncated cone shape so as to become narrower from both ends of the lubricant suction pipe 111 toward the inside, thereby forming lubricant suction holes 112a and 112b at their inner ends, respectively. The lubricant guide pipes 112A and 112B are preferably post-assembled by welding or the like. However, in some cases, the lubricant guide pipes 112A and 112B may be formed by bending both ends of the lubricant suction pipe 111 to a predetermined depth inward.

The length of the lubricant guide pipes 112A and 112B is preferably shorter than the length from the end of the lubricant suction pipe 111 to the lubricant discharge hole 111a.

On the other hand, although not shown in the drawings, the lubricating oil supply passage part 120 is formed to extend to the lower end in the front frame 21 and the lubricating oil discharge hole 111a of the lubricating oil suction pipe 111 described above is provided. You can also connect directly. In addition, in order to allow more lubricating oil sucked into the lubricating oil suction pipe 111 to be supplied to the lubricating oil supply passage part 120, the lubricating oil blocking part 114 is disposed at a predetermined height in the middle of the inner circumferential surface of the lubricating oil suction pipe 111. It may be formed to protrude. In this case, the lubricating oil suction pipe 111 is preferably assembled after the left and right separately around the lubricating oil blocking unit 114.

Also, as shown in FIG. 7, the lubricant suction holes 112a and 112b of the lubricant guide tube 112 can be blocked while moving in the direction opposite to the vibration direction of the compression unit 40 inside the lubricant suction pipe 111. A spherical or piston shaped lubricant valve 115 may be added.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

The lubricating oil supply device of the reciprocating compressor of the present invention as described above has the following effects.

That is, when a flux is formed between the outer stator 31 and the inner stator 32 by applying power to the reciprocating motor 30, the mover 33 moves along the direction of the flux and the resonance spring unit ( 50) continuously reciprocating, and with the piston 42 reciprocating in the cylinder 41, the refrigerant gas is sucked and compressed into the compression space (P) and discharged, in the process of the compressor main body Lubricating oil of the casing 10 is sucked through the lubricating oil suction unit 110 which vibrates together and supplied to the sliding portion between the cylinder 41 and the piston 42 along the lubricating oil supply passage 120 and then back to the casing 10. Repeat the series of steps to recover.

Looking at the process of supplying the lubricant in more detail as follows.

First, as shown in FIG. 5A, when the lubricating oil suction pipe 111 moves in the direction "A" of the drawing, the lubricating oil of the casing 10 passes through the lubricating oil suction pipe 112 through the lubricating oil suction hole 112a of the lubricating oil guide pipe 112B. 111 flows inward, and this lubricant is partially out of the lubricant suction pipe 111 again through the lubricant suction hole 112b of the rear lubricant guide pipe 112B as the rear side of the lubricant suction pipe 111 is opened. While exiting, a part is caught between the lubricant suction pipe 111 and the lubricant guide pipe 112B while being flowed back, and is sucked into the lubricant supply flow path 120 through the lubricant connection pipe 113, and the lubricant is supplied to the lubricant supply flow path ( Along the 120 is supplied to the sliding portion between the cylinder 41 and the piston 42.

Next, as shown in FIG. 5B, when the lubricant suction pipe 111 moves in the direction “B” of the drawing, the lubricant oil of the casing 10 passes through the lubricant suction hole 112b of the rear side of the lubricant guide pipe 111. 111 flows inward, and this lubricant is partially out of the lubricant suction pipe 111 again through the lubricant suction hole 112a of the front lubricant guide pipe 112A as the front side of the lubricant suction pipe 111 is opened. While exiting, a part is caught between the lubricating oil suction pipe 111 and the lubricating oil guide pipe 112A and flows back into the lubricating oil supply passage 120 through the lubricating oil connecting pipe 113, and the lubricating oil is supplied to the lubricating oil supply passage ( Along the 120 is supplied to the sliding portion between the cylinder 41 and the piston 42.

At this time, when the lubricant blocking portion 114 is provided in the middle of the inner circumferential surface of the lubricant suction pipe 111 as shown in FIG. 6, or when the lubricant valve 115 is provided as shown in FIG. 7, one side lubricant suction holes 112a and 112b are provided. The suction amount of the lubricating oil can be increased by blocking a considerable amount of the lubricating oil suctioned from the) side and going to the other side so that the lubricating oil is immediately supplied to the sliding portion between the cylinder 41 and the piston 42 through the lubricating oil supply passage 120. .

In this way, it is possible to simplify the configuration of the lubricating oil supply device to reduce the number of parts, thereby simplifying the assembly work while increasing the productivity of the reciprocating compressor.

In addition, by opening both ends of the lubricant suction pipe but forming the flow path resistance parts in opposite directions to each other, the lubricant supply can be significantly increased by sucking the lubricant along the vibration direction each time the lubricant suction pipe oscillates once. .

The lubricating oil supply device of the reciprocating compressor according to the present invention is configured to open the both ends of the lubricating oil suction pipe, but to form a flow path resistance portion narrowing toward both ends inward so as to be sucked by the inertia of the lubricating oil, thereby simplifying the configuration of the lubricating oil supply device. This reduces the number of parts and simplifies assembly, thereby increasing the productivity of the reciprocating compressor.

Further, by opening both ends of the lubricating oil suction pipe and forming a flow path resistance portion at both ends, the lubricating oil can be remarkably increased by allowing the lubricating oil to be sucked twice each time the lubricating oil suction pipe is reciprocated once.

1 is a longitudinal sectional view showing an example of a conventional reciprocating compressor;

Figure 2a and 2b is a longitudinal sectional view showing the operation for the conventional lubricating oil supply device,

3 is a longitudinal sectional view showing an example of the reciprocating compressor of the present invention;

Figure 4 is a perspective view of the present invention lubricating oil supply broken

Figures 5a and 5b is a longitudinal sectional view showing the operation of the lubricating oil supply device of the present invention,

6 and 7 are schematic diagrams each showing a modified example of the lubricating oil supply device of the present invention.

** Description of symbols for the main parts of the drawing **

21: front frame 41: cylinder

42: piston 110: lubricating oil suction part

111: lube oil suction pipe 111a: lube oil discharge hole

112A, 112B: Lube oil guide tube 112a, 112b: Lube oil suction hole

113: lubricating oil connector 120: lubricating oil supply passage

Claims (4)

Casing filled with lubricant on the bottom, A compressor main body having a reciprocating motor in which the mover reciprocates in a straight line and the piston coupled to the mover of the reciprocating motor compresses the refrigerant gas while reciprocating in a straight line in the cylinder; Arranged so as to be immersed in the lubricating oil of the casing opening in the direction corresponding to the vibration direction of the compressor main body to form a flow path resistance portion that narrows at least one end inward to vibrate with the compressor main body while sucking the lubricating oil of the casing Lubricant suction pipe, A lubricating oil supply device of a reciprocating compressor including a lubricating oil guide portion communicating a lubricating oil suction pipe between a cylinder and a piston of the compressor main body. The method of claim 1, A flow path resistance part is a lubricating oil supply device for a reciprocating compressor, characterized in that the truncated cone-shaped tubular shape is manufactured after the assembly. The method of claim 1, The flow path resistance portion is formed by bending at least one end of the lubricating oil suction pipe inwardly. The method according to any one of claims 1 to 3, A lubricating oil supply device of a reciprocating compressor, characterized in that the inner peripheral surface of the lubricating oil suction pipe is formed to protrude a lubricating oil blocking portion for blocking the lubricating oil and leading to the lubricating oil guide portion.