KR20050012009A - Oil supply apparatus for enclosed compressor - Google Patents

Abstract

PURPOSE: An oil feed device of a closed compressor is provided to store the constant amount of oil on the outer peripheral surface of a blade unit all the time and to prevent the performance reduction of a compressor caused by the loss of friction by lubricating the inner peripheral surface of a cylinder and the outer peripheral surface of the blade unit in driving the compressor. CONSTITUTION: A closed compressor comprises a cylinder assembly having a predetermined inner space, plural vane slots communicating with the inner space, and plural discharge ports formed at the side of the vane slot to communicate with the inner space; a rotary shaft having a blade unit(13) for dividing the inner space of the cylinder assembly into plural closed spaces and moving fluid in each closed space with rotating relatively; and a plurality of vanes inserted into the vane slot of the cylinder assembly to contact with both upper and lower sides of the blade unit and reciprocated axially along the shape of the blade unit to compress the fluid in each closed space. An oil feed device for the closed compressor is composed of an oil hole(11a) bored axially through the rotary shaft; at least one oil passage(13a) for communicating from the middle side of the oil hole to the outer peripheral surface of the blade unit; and an oil storage groove(13b) recessed at the constant depth on the outer peripheral surface of the blade unit to communicate with the end of the oil passage.

Description

OIL SUPPLY APPARATUS FOR ENCLOSED COMPRESSOR}

The present invention relates to a hermetic compressor for dividing the inner space of the cylinder into a plurality of hermetic spaces. In particular, the oil of the hermetic compressor to lubricate the sliding part with the cylinder by forming an oil receiving groove communicating with the oil hole on the outer peripheral surface of the blade portion. It relates to a supply device.

In general, a vane compressor (hereinafter, referred to as a hermetic compressor) compresses a vane to a rotating body and rotates the rotating body in a state in which an inner space of the cylinder is partitioned into a suction area and a compression area. In order to continuously change the fluid to suck and discharge.

In such a hermetic compressor, a blade unit is disposed on a rotating shaft to divide an inner space of a cylinder into a plurality of sealed spaces, and a vane is formed in each sealed space to form a plurality of compressed spaces.

1 is a longitudinal sectional view showing an example of a conventional hermetic compressor.

As shown in the drawing, a conventional hermetic compressor includes an electric mechanism part including a stator Ms and a rotor Mr installed to generate power in the inner upper portion of the casing 1, and a rotor (Mr) under the electric mechanism part. It is composed of a compressor mechanism which is installed to suck and discharge the fluid by connecting to the

The compression mechanism has an internal space (V) for sucking and compressing refrigerant gas, and the cylinder (2) is fixed to the lower half of the casing (1) and the upper and lower surfaces of the cylinder (2), respectively, to form a cylinder assembly together. An upper bearing plate 3A and a lower bearing plate 3B and a blade portion 4B are provided to partition the inner space V of the cylinder assembly into a plurality of sealed spaces S1 and S2. To each side of the rotating shaft 4 and the blade portion 4B of the rotating shaft 4 to deliver the compressor to the compression mechanism, and the respective spaces S1 and S2 during the rotation of the rotating shaft 4 are suction and compression regions. First vane 5A and second vane 5B, which are variable in the first direction, first spring assembly 6A and second spring assembly 6B for elastically supporting each vane 5A, 5B, and an upper bearing plate. Compression is provided on the outer surface of 3A and lower bearing plate 3B and discharged in each space S1 and S2. And an upper muffler (7A) and a lower muffler (7B) for attenuating the discharge noise of the switch.

The cylinder 2 is formed in an annular shape such that its inner circumferential surface has a smooth smooth surface, and communicates with the gas suction pipe SP on one side to form one inlet port 2a in collective communication with the respective closed spaces S1 and S2. Doing.

The upper bearing plate 3A and the lower bearing plate 3B are formed in a disk shape to cover the upper and lower surfaces of the cylinder 2, and the vane slit 3a to insert the vanes 5A and 5B on one side thereof. Discharge openings 3b and 3b are formed on one side of the circumferential direction of the vane slit 3a and 3a and communicate with each space independently.

The rotating shaft 4 is coupled to the rotor Mr of the electric mechanism to transmit power by passing through the upper bearing plate 3A and the lower bearing plate 3B, and a radius at the lower half of the shaft portion 4A. The bearing portion 4B for slidingly supporting the thrust bearing surfaces of the upper bearing plate 3A and the lower bearing plate 3B and the outer circumferential surface of the bearing portion 4B. It consists of the blade part 4C which divides V into the 1st space S1 and the 2nd space S2.

The shaft portion 4A has an oil hole 4a formed therein in the axial direction, and an oil feeder 4b is provided at the lower end of the oil hole 4a so that oil in the casing 1 can be easily sucked. Equipped.

The bearing part 4B forms the both bearing surface F which contact | connects the upper and lower bearing plates 3A and 3B to a smooth smooth surface.

The blade portion 4C is formed in a disk shape in planar projection such that the outer circumferential surface is in sliding contact with the inner circumferential surface of the cylinder 2, and both sides are formed in a sinusoidal cam surface having the same thickness from the inner circumferential surface to the outer circumferential surface when the side surface is deployed.

The conventional hermetic compressor as described above operates as follows.

That is, when the rotor (Mr) is rotated by applying power to the electric mechanism, the rotary shaft 4 coupled to the rotor (Mr) rotates in either direction, the blade portion 4C of the rotary shaft 4 up and down The vanes 5A and 5B in contact with the side surfaces reciprocate in the opposite directions up and down along the height of the blade portion 4C while varying the volume of the first space S1 and the second space S2 of the cylinder 2. do. Accordingly, the new refrigerant gas is continuously sucked into the first space S1 and the second space S2 through the suction pipe SP, and the refrigerant gas is gradually compressed with the rotation of the rotary shaft 4, and then the blade portion ( A series of processes are alternately discharged through each discharge port (not shown) from the moment when both convex surfaces of 4C) reach the discharge start point and pass through the discharge port (not shown) of each bearing plate 3A, 3B. Repeat.

At this time, while the rotating shaft 4 rotates, the oil feeder 4b sucks oil from the casing 1, and this oil is sucked up to the upper end of the rotating shaft 4 along the oil hole 4a, and part of it is scattered from the upper end. The driving motor was cooled or lubricated by flowing into the sliding part, while part of the driving motor was led along the oil path (not shown) penetrating to the outer circumferential surface of the rotating shaft 4 in the middle of the oil hole 4a to lubricate the sliding part.

However, in the conventional hermetic compressor as described above, although the outer circumferential surface of the blade portion 4C is in contact with the inner circumferential surface of the cylinder 2 and performs a relative rotational movement, the supply of oil is less severe to the outer circumferential surface of the blade portion 4C. Of course, even if a small amount of diarrhea, even if a frictional loss caused it can not be stored, especially in the initial start-up caused a problem of dry wear due to lack of oil.

In addition, oil was not stored between the bearing portion of the rotating shaft 4 and the thrust bearing surface of each bearing plate 3A, 3B in contact with it, and there was also a risk of dry wear due to oil shortage during initial startup.

The present invention has been made in view of the problems of the conventional vane compressor as described above, and to provide an oil supply device of the hermetic compressor to guide the oil to the outer peripheral surface of the blade portion and to store the induced oil. There is this.

Another object of the present invention is to provide an oil supply device of a hermetic compressor that can supply and store oil between a bearing portion of a rotating shaft and a thrust bearing surface of each bearing plate in contact with the rotating shaft.

1 is a longitudinal sectional view showing a part of a conventional hermetic compressor,

Figure 2 is a schematic view showing a cross section of a rotating shaft in a conventional hermetic compressor,

3 is a longitudinal sectional view showing a part of the hermetic compressor of the present invention;

Figure 4 is a perspective view of a rotating shaft in the present invention hermetic compressor,

Figure 5 is a schematic view showing a cross section of the rotating shaft in the present invention hermetic compressor,

Figure 6 is a schematic view showing the main portion of the compression mechanism including a rotating shaft in the hermetic compressor of the present invention.

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

2: cylinder 3A, 3B: bearing plate

10: shaft 11: shaft portion

11a: oil hole 11b: oil feeder

12: bearing part 12a: oil storage groove

13 blade portion 13a: oil path

13b: Oil storage groove

In order to achieve the object of the present invention, a cylinder assembly having a predetermined inner space and through the plurality of vane slots communicating with the inner space and forming a plurality of discharge ports communicating with the inner space on one side of the vane slot; The inner space of the cylinder assembly is partitioned into a plurality of sealed spaces and rotated relative to each other to move the fluid in each sealed space while rotating, and inserted into the vane slot of the cylinder assembly to contact the upper and lower sides of the blade portion In the hermetic compressor including a plurality of vanes for compressing the fluid in each closed space while reciprocating in the axial direction along the shape of the blade, the oil hole penetrating in the axial direction of the rotating shaft, the blade in the middle of the oil hole At least one oil passage communicating with the outer peripheral surface of the It provides a hermetic compressor oil supply unit which comprises an oil storage groove which is formed to be figures in combination with a predetermined depth in the outer circumferential surface of the blade portion so as to communicate with the end of the flow path.

The present invention also provides an oil supply device for a hermetic compressor, wherein an annular or arc-shaped oil storage groove is formed on a bearing surface which is in contact with the cylinder assembly in the thrust direction or on the thrust bearing surface of the cylinder assembly opposite thereto.

EMBODIMENT OF THE INVENTION Hereinafter, the dead volume reduction apparatus of the hermetic compressor by this invention is demonstrated in detail based on one Example shown in an accompanying drawing.

Figure 3 is a longitudinal sectional view showing a part of the hermetic compressor of the present invention, Figure 4 is a perspective view showing a rotating shaft of the present invention hermetic compressor, Figure 5 is a schematic view showing a rotating shaft in the hermetic compressor of the present invention, Figure 6 is the present invention It is a schematic diagram which shows the main part of a compression mechanism part including a rotating shaft in a hermetic compressor.

As shown in the figure, the compression mechanism of the hermetic compressor according to the present invention includes a cylinder 2 fixedly installed inside the casing 1, and fixedly installed on both upper and lower sides of the cylinder 2. The upper bearing plate 3A and the lower bearing plate 3B, which together form a cylinder assembly, are rotatably installed in the cylinder assembly, and the inner space V of the cylinder assembly is enclosed in the first space S1 and the first space. It is inserted into the bearing plate (3A) (3B) so as to be in pressure contact with the rotary shaft 10 having the blade portion 13 to partition into two spaces (S2) and the upper and lower sides of the blade portion 13 of the rotary shaft (10) The first vane 5A and the second vane 5B block the movement of the refrigerant gas.

The cylinder 2 is formed in an annular shape, and one suction port (unsigned) is formed at one side thereof so as to communicate with both spaces S1 and S2 together.

The upper bearing plate 3A and the lower bearing plate 3B are formed in a disk shape so as to cover the upper and lower surfaces of the cylinder 2, and at one side thereof, a vane slit to insert the vanes 5A and 5B. ) And a discharge port (not shown) communicating independently with each space on one circumferential side of the vane slit.

Here, as shown in FIG. 7, the thrust bearing surface F of the rotating shaft 10 in contact with the thrust bearing surface of the upper bearing plate 3A or the thrust bearing surface F of the lower bearing plate 3B respectively flows in between them. An oil storage groove 12a of an annular shape or an arc shape may be formed to store oil.

Rotating shaft 10 is coupled to the rotor (Mr) of the transmission mechanism to transmit power through the upper bearing plate (3A) and lower bearing plate (3B) and a radius in the lower half of the shaft portion (11) The bearing portion 12 which is extended in the direction to slide on the thrust bearing surfaces of the upper bearing plate 3A and the lower bearing plate 3B, and the outer circumferential surface of the bearing portion 12 to form an inner space of the cylinder assembly. It consists of the blade part 13 which divides V into the 1st space S1 and the 2nd space S2.

The shaft portion 11 penetrates axially therein to form an oil hole 11a for guiding the oil of the casing 1 to the upper end, and the oil of the casing 1 is formed at the lower end of the oil hole 11a. Install the oil feeder 11b to suck in.

In the middle of the oil hole 11a, a plurality of oil passages 13a (in the drawing, approximately 90 ° angle) are radially formed so as to face the outer circumferential surface of the blade portion 13, and the oil passage 13a At the end, the oil storage groove 13b to be described later is formed to be negatively shaped to a predetermined depth so as to store the oil supplied through the oil passage 13a.

The bearing portion 12 is formed in a substantially flat smooth surface of the bearing surface (F) in contact with the upper bearing plate (3A) and the lower bearing plate (3B), the middle of the bearing surface (F) as shown in Figure 7 To a depth, the negative paper may form an oil storage groove 12a.

The blade portion 13 is formed in a disk shape in planar projection so that the outer circumferential surface is in sliding contact with the inner circumferential surface of the cylinder 2, and both sides are formed in a sinusoidal cam surface having the same thickness from the inner circumferential surface to the outer circumferential surface when the side surface is deployed.

In addition, the outer circumferential surface of the blade portion 13 forms an oil storage groove 13b with a predetermined depth so as to communicate with the oil flow passage 13a as described above, and the oil storage groove 13b is a compressor as shown in FIG. It is preferable to form a tapered cross-sectional shape so as to become wider inward so that a certain amount of oil can be stored even at the stop.

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

Effects of the present invention hermetic compressor as described above are as follows.

That is, when the rotary shaft 10 is rotated by applying power to the electric mechanism, the blade portion 13 of the rotary shaft 10 is rotated in the inner space (V) of the cylinder 2, the first through the inlet 2a The refrigerant gas is alternately sucked into the space S1 and the second space S2, and the refrigerant gas moves along the blade portion 13 while the rotating shaft 10 continuously rotates, and then each vane 5A ( While being compressed by 5B, they are alternately discharged through discharge ports (not shown) of the respective spaces S1 and S2.

At this time, when the rotating shaft 10 rotates, the oil feeder 11b attached to the lower end of the oil hole 11a rotates together, sucks oil from the casing 1, and sucks up to the upper end of the oil hole 11a. The blade cools the driving motor or lubricates the sliding portion while scattering in all directions from the top of the oil hole 11a, while a portion of the blade is sucked along the oil hole 11a and communicated with the blade portion 13 through the oil channel 13a. To the outer circumferential surface of. The oil is filled in the oil storage groove 13b formed at the end of the oil passage 13a and lubricates between the outer circumferential surface of the blade portion 13 and the inner circumferential surface of the cylinder 2 in contact with the first space S1. In accordance with the pressure difference between the second space (S2), the refrigerant gas also serves as a sealing material to block leakage between the stationary.

In addition, a part of the oil drawn up through the oil hole 11a is guided to the outer circumferential surface of the shaft portion 11 through another oil flow path (not shown), and the oil is opposed to the bearing surface F of the rotating shaft 10 or opposite thereto. Lubricates the sliding portion between the rotating shaft 10 and each bearing plate 3A, 3B while being filled in the oil storage groove 12a provided in the thrust bearing surface F of each bearing plate 3A, 3B. .

On the other hand, even when the compressor is stopped, each oil storage groove (12a, 13b) is filled with a certain amount of oil and supplied when the compressor is restarted to prevent the dry wear of each sliding portion in advance. In this case, as the oil storage grooves 12a and 13b are formed to be wider inward, the oil storage grooves 12a and 13b can be stored more and can supply oil smoothly upon restart.

In this way, a certain amount of oil can be stored on the outer circumferential surface of the blade portion, the inner circumferential surface of the cylinder, and each bearing surface, thereby smoothly supplying the oil to the sliding portion during the operation of the compressor or when it is stopped and restarted, thereby improving the performance of the compressor. It can increase.

In the oil supply apparatus of the hermetic compressor according to the present invention, the oil flow passage penetrates to the outer circumferential surface of the blade portion so as to communicate with the oil hole of the rotating shaft, and an oil storage groove is formed on the outer circumferential surface of the blade portion so that a certain amount of oil is always on the outer circumferential surface of the blade portion. After storage, the compressor may be lubricated between the inner circumferential surface of the cylinder and the outer circumferential surface of the blade to prevent the deterioration of the compressor due to friction loss.

Claims (3)

A cylinder assembly having a predetermined inner space therethrough and having a plurality of vane slots communicating with the inner space and forming a plurality of discharge ports communicating with the inner space at one side of the vane slot, and a plurality of inner spaces of the cylinder assembly A rotary shaft having a blade unit for moving fluid in each sealed space while partitioned into a sealed space and moving relative to the sealed space, and inserted into a vane slot of the cylinder assembly so as to contact the upper and lower sides of the blade portion, and axially along the shape of the blade portion. In a hermetic compressor including a plurality of vanes for compressing a fluid in each enclosed space while reciprocating. Oil hole penetrating in the axial direction of the rotation axis, at least one oil passage communicating with the outer peripheral surface of the blade portion in the middle of the oil hole, and the outer peripheral surface of the blade portion so as to communicate with the end of the oil passage so as to be negatively formed to a certain depth Oil supply device of a hermetic compressor, characterized in that consisting of an oil storage groove. The method of claim 1, The oil storage groove is an oil supply device of a hermetic compressor, characterized in that it is formed into an expanded cross-sectional shape toward the inside of the blade portion. The method of claim 1, An oil supply device for a hermetic compressor, characterized in that an annular or arc-shaped oil storage groove is formed on the bearing surface which is in contact with the cylinder assembly in the thrust direction or on the thrust bearing surface of the cylinder assembly opposite thereto.