EP1458979B1

EP1458979B1 - Vane of compressor

Info

Publication number: EP1458979B1
Application number: EP02793520A
Authority: EP
Inventors: Chang-Soo Seokbong-Maeul Daedong LEE
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2001-12-28
Filing date: 2002-12-26
Publication date: 2008-06-04
Anticipated expiration: 2022-12-26
Also published as: BR0207684A; WO2003056181A1; KR20030057030A; EP1458979A1; BR0207684B1; JP3955848B2; AU2002359038A1; JP2005513354A; ES2307814T3; KR100438959B1

Description

TECHNICAL FIELD

The present invention relates to a vane of a compressor and particularly, to a vane of a compressor, capable of improving vibration absorption and abrasion proof and reducing weight.

BACKGROUND ART

Generally, a compressor is an instrument for compressing gas such as refrigerant and the like. The compressor generally is classified into a rotary compressor, reciprocating compressor and a scroll compressor according to the gas compression method.
Such compressor composes a refrigerating cycle device which is mounted in a refrigerator or air conditioner and it forms a hermetic system.
Figures 1 and 2 show an embodiment of the compressor. As shown in the drawing, in the hermetic compressor, a rotation shaft 30 coupled with a rotor 21 of a driving motor 20 rotates when the driving unit 20 mounted in the hermetic housing 10 is driven.
As the rotation shaft 30 rotates, the eccentric portion 31 of the rotation shaft 30 eccentrically rotates in the compression space P of a cylinder 40, which is positioned at the lower side of the driving motor 20.
As the eccentric portion 31 of the rotation shaft 30 rotates in the compression space P of the cylinder 40, a side of a rolling piston 50 coupled with the eccentric portion 31 is linearly contacted on the inner wall of the compression space P of the cylinder 40.
The other side of the rolling piston 50 performs a circular movement in the compression space P of the cylinder 40 being also linearly contacted on a vane 60 which is coupled with a vane slot 41 formed at one side of the cylinder 40 slidably.
As the rolling piston 50 performs a circular movement in the compression space P of the cylinder 40, the compression space P of the cylinder 40 divided by the vane 60 is converted into a suction region (a) and a compression region (b), and the refrigerant gas is sucked through a suction port 42 positioned in the cylinder 40, and then compressed and discharged through a discharge port 43 positioned in the cylinder 40.
The compression refrigerant gas discharged through the discharge port 43 is discharged to the inside of the hermetic housing 10 through a discharge through hole 71 formed in an upper bearing plate 70 among the upper bearing plate 70 and a lower bearing plate 80, which are respectively covered and coupled with the both sides of the cylinder 40.
The refrigerant gas of high temperature and high pressure which is discharged into the hermetic housing 10 is discharged through a discharge tube 11 coupled with the upper portion of the hermetic housing 10.
At this time, as the compression space P of the cylinder 40 is converted into the suction region (a) and the compression region (b), the discharge through hole 71 is opened and closed by operating an opening/closing means 90 coupled with the upper portion of the upper bearing plate 70 together.
Reference numeral 12 designates a suction tube, 13 designates a coupling bolt, 22 designates a stator and 100 designates a muffler.
On the other hand, as shown in Figure 3, the vane 60 which is inserted in the vane slot 41 of the cylinder 40 and performs a linear reciprocating movement being linearly contacted on the rolling piston 50 is formed in a square shape, and a side of the vane 60 is composed of a curved surface 61 having a predetermined curvature.
The vane 60 has a curved surface 61 which is inserted in the vane slot 41 of the cylinder 40 to be contacted on the rolling piston 50, and the opposed curved surface of the vane 60 is elastically supported by a spring S. The curved surface is abutted on the rolling piston 50, and as the rotation shaft 30 rotates, the compression space P of the cylinder 40 is divided into the suction region (a) and compression region (b).
In addition, the vane 60 is manufactured by high speed lathe turning steel of a predetermined shape.
Also, the vane 60 performs a linear reciprocating movement in the vane slot 41 of the cylinder 40 receiving a pressure in the side direction by pressure difference of the suction region (a) and compression region (b) of the cylinder 40 and a certain force is applied to the curved surface 61 as the surface is elastically contacted on the rolling piston 50.
However, in the structure and shape of the vane 60, since the material is made of high speed steel, the curved surface 61 of the vane 60 was linearly contacted on the rolling piston 50, much abrasion between the cylinder 40 and rolling piston 50 in the process of linear reciprocating movement in the vane slot 41 of the cylinder 40 was generated, and much friction noise was generated. Also, the movement was blunted since the weight of the vane 60 was heavy, and consumption of input energy was increased.
It is also known from document EP 715079 a refrigerating apparatus which uses a lubricating oil composition as refrigerator oil and comprises a sealed electric driving compressor whose sliding members are made of a material selected from iron type materials, composite materials of aluminum and carbon, iron type materials surface-treated with chromium nitride and ceramic materials.
Document US 4669963 discloses a rotary piston vacuum pump having a rotor eccentrically disposed in a cylinder and mounted therein for revolution in rolling contact with the cylindrical inner peripehral surface of the cylinder so that a crescent-shaped space is defined between the rotor and the cylinder and moved around the axis of the cylinder. A vane is radially reciprocally mounted in a vane chamber having an inner end open to the cylindrical inner peripheral surface of the cylinder. The vane has an inner end in sliding contact with the outer peripheral surface of the rotor to divide the crescent-shaped space into a suction chamber in communication with a suction port and a discharge port to be communicated with a discharge port having an inner end open in a wall of an outer part of the vane chamber.

DISCLOSURE OF THE INVENTION

Therefore, it is an object of the present invention to provide a vane of a compressor, capable of improving vibration absorption and abrasion proof and reducing weight.
To achieve these objects, there is provided a vane of a compressor, as described in claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a longitudinal sectional view showing an embodiment of a conventional compressor;
Figure 2 is a plane sectional view showing an embodiment of the conventional compressor;
Figure 3 is a perspective view showing a vane of the conventional compressor;
Figure 4 is a longitudinal sectional view showing a compressor including a vane for the compressor in accordance with the present invention;
Figure 5 is a plane sectional view showing the compressor including the vane for the compressor in accordance with the present invention;
Figure 6 is a perspective view showing another embodiment of the vane for the compressor in accordance with the present invention;
Figure 7 is a perspective view showing another embodiment of another embodiment of the vane for the compressor in accordance with the present invention;
Figure 8 is a perspective view showing another embodiment of another embodiment of the vane for the compressor in accordance with the present invention;
Figure 9 is a perspective view showing another embodiment of another embodiment of the vane for the compressor in accordance with the present invention;
Figure 10 is a perspective view showing another embodiment of another embodiment of the vane for the compressor in accordance with the present invention; and
Figure 11 is a perspective view showing another embodiment of another embodiment of the vane for the compressor in accordance with the present invention.

MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS

Hereinafter, the vane of the compressor in accordance with the present invention will be described with reference to the accompanied drawings.
Figures 4 and 5 show a compressor in which the embodiment of the vane for the compressor in accordance with the present invention. As shown in the drawings, the compressor includes a hermetic housing 10, a driving motor which is composed of a stator 22 mounted in the hermetic housing 10 and a rotor 21 which is inserted in the stator 22, a rotation shaft 30 which has a eccentric portion 31 therein and is compressed and inserted in the inner diameter of the rotor 3, a cylinder 40 in which a through hole is formed, which is fixed and coupled with the hermetic housing 10 by having a compression space P in which gas is sucked and compressed and an eccentric portion 31 of the rotation shaft 30 is inserted, an upper bearing plate 70 and a lower bearing plate 80 which are respectively positioned in the upper and lower portions of the cylinder 40 to seal the compression space P of the cylinder 40 for supporting the rotation shaft 30, a plurality of combining bolts 13 for combining the upper bearing plate 70 and a lower bearing plate 80 together with the cylinder 40, a rolling piston which is inserted in the eccentric portion 31 of the rotation shaft 30 and revolves in the compression space P of the cylinder 40 according to rotation of the rotation shaft 30, a vane 120 which is inserted in the vane slot 41 formed in the cylinder 40 so that it can perform a linear reciprocating movement and has an end portion which is linearly contacted on the circumferential surface of the rolling piston 50 to converting the compression space P of the cylinder 40 into a suction region (a) and compression space (b) according to rotation of the rotation shaft 30.
Reference numeral 11 in the drawings, designates a discharge tube, 12 designates a suction tube, 42 designates a suction port, 71 designates a discharge port, 90 designates a discharge hole, 100 designates an opening/closing means, and S designates a spring.
As shown in Figure 5, the vane 120 is formed to have a thickness corresponding to the width of the vane slot 41 and square shape, and the vane 120 includes a vane preform 121 in which a curved surface C formed to have a curvature so that a side is linearly contacted on the outer surface of the rolling piston 50 is positioned, and fiber 122 which is inserted inside the vane preform 121, for strengthening performance of the vane preform 121.
The vane preform 121 is made of carbon materials and the fiber 121 is formed by arranging a plurality of fiber wires in the wire shape having a predetermined length in the same direction as the movement direction of the vane preform 121 in a row.
That is, the vane preform 121 is formed by inserting a plurality of fiber wires in the linear direction of the movement of the vane preform 121 or by arranging the plurality of the fiber wires.
As another embodiment of the fiber 122, as shown in Figure 6, the fiber 122 is formed as a fiber net of a net shape and the fiber net is inserted to be arranged on a curved surface same as the curved surface of the vane preform 121.
That is, the fiber net having an area corresponding to the area of the vane preform 121 is inserted in the vane preform 121.
As another embodiment of the fiber 122, as shown in Figure 7, a plurality of first fiber wires f1 in the wire shape having a predetermined length are arranged in the movement direction of the vane preform 121 in a row, and second fiber wires having a predetermined length are radially arranged along a circumferential direction in the curved surface region of the inner part of the curved surface C of the vane preform 121.
As another embodiment of the present invention, as shown in Figure 8, the vane preform 221 is made of graphite materials, and the fiber 122 is formed by arranging a plurality of fiber wires in the wire shape having a predetermined length in the movement direction of the vane preform 121 in a row.
That is, the vane preform 221 is formed by inserting a plurality of fiber wires in the linear direction of the movement of the vane preform 221 or by arranging the plurality of the fiber wires.
As still another embodiment of the present invention, as shown in Figure 9, the fiber is formed as a fiber net in the net shape and the plurality of fiber nets are inserted on the same surface as that of the vane preform 221.
That is, the fiber net having an area corresponding to the area of the vane preform 221 is inserted in the vane preform 221.
As another embodiment of the fiber 122, as shown in Figure 10, a plurality of first fiber wires f1 in the wire shape having a predetermined length are arranged in the movement direction of the vane preform 221 in a row, and second fiber wires having a predetermined length are radially arranged along a circumferential direction in the curved surface region of the inner part of the curved surface C of the vane preform 221.
As still another embodiment of the present invention, as shown in Figure 11, the vane preform 321 is made of aluminum alloy.
As still another embodiment of the present invention, the vane preforms 121, 221 and 321 can be made of resin materials, such as PEEK, polyamide, carbon, epoxy and the like.
As a method for manufacturing the vane 120 which is composed of the vane preform 121 and fiber 122, there is a method of manufacturing the vane 120 by forming a fiber mold with fiber wire or fiber net which form fiber 122 inside a mold which can make a shape of the vane preform 121, and then solidifying by pouring the melted vane preform 121 into the mold.
The vane 120 composed of the vane preform 121 and fiber 122 is inserted in the vane slot 41 of the cylinder 40 so that the curved surface C is contacted on the circumferential surface of the rolling piston 50, and the vane 120 inserted in the vane slot 41 of the cylinder 40 is elastically supported by the spring S.
Hereinafter, the operational effect of the vane for the compressor in accordance with the present invention will be described.
Firstly, in the operation of the compressor, when the rotation shaft 30 rotates as a driving force of the driving motor is transmitted to the rotation shaft 30, the rolling piston 50 which is coupled with the eccentric portion 31 of the rotation shaft revolves on the basis of the center of the shaft in the compression space P of the cylinder under the condition that it is contacted on the vane 120.
As the rolling piston 50 revolves, the volume of the compression space P of the cylinder 40 is changed by a linear reciprocating movement of the vane 120. That is, as the compression space P is converted into a suction region (a) and compression region (b), refrigerant gas of low temperature and pressure is sucked to the compression space P of the cylinder 40 through the suction tube 12 and suction port 42, is compressed, discharged through the discharge port 43 and discharge hole 71, and then discharged to the outside of the hermetic housing 10 through the discharge tube 11.
In the above process, the vane 120 performs a linear reciprocating movement receiving a pressure in the side _direction by pressure difference between the suction region (a) and compression region (b) of the compression space P, and the curved surface C of the vane 120 is contacted on the circumferential surface of the rolling piston 50 being elastically supported by the spring S.
Under the above condition, the vane 120 is composed of vane preforms 121, 221 and 321 and fiber 122, reduces abrasion amount among the vane and parts which perform relative motion with the vane 120, and minimizes vibration generation by friction contact.
That is, in case the vane preform 121, 221 and 321 of the vane 120 is made of carbon or graphite, the carbon and graphite gains self-lubrication, and vibration generated when the vane 120 and the parts which perform relative motion perform sliding movement by the fiber 122 inserted in the vane preforms 121, 221 and 321 made of carbon or graphite can be reduced.
As the fiber 122 is arranged in the vane preforms 121, 221 and 321 in the same direction as that of the movement direction of the vane 120 and inserted, or it can be inserted in a net shape, thus to effectively supporting a force generated by compression difference between the suction region (a) and compression region (b) of the compression space P of the cylinder 40.
Also, in case the vane preforms 121, 221 and 321 of the vane 120 is made of resin or aluminum alloy, the plasticity is improved and molding of the vane 120 is eased. In addition, the weight becomes lighter and the movement can be done smoothly.
Also, the vibration which is generated according to movement of the vane 120 by the fiber 122 inserted in the vane preforms 121, 221 and 321 made of resin or aluminum alloy can be effectively absorbed and the structural strength can be increased.
In the present invention, the vane of the compression is inserted in the vane slot of the cylinder and performs a linear reciprocating movement as the rolling piston revolves. Accordingly, abrasion resistance and vibration absorbency of the vane for diving the compression space of the cylinder into the suction region and compression region can be improved. Therefore, damage of the vane and parts which perform relative motion with the vane can be prevented and reliability can be increased by reducing vibration noise. Also, as the weight can be lightened, linear movement can be smoothly performed and input power source can be reduced.

Claims

A vane of a compressor, comprising:
a vane preform (121) which is inserted in a vane slot (41) of a cylinder (40) having a compression space (P) therein, has a predetermined thickness and area to divide the cylinder compression space into a suction region (a) and a compression region (b), and has a side linearly contacted on a rolling piston (50), performing a linear reciprocating movement according to rotation of the rolling piston (50), being linearly contacted on the rolling piston (50) which is positioned in the compression space of the cylinder (40);
characterized in that further comprises fiber (122) which are inserted inside the vane preform (121) and formed in the same direction as the movement direction of the vane (121).
The vane of claim 1, wherein the fiber (122) is formed by arranging a purality of fiber wires in a row in the same direction as that of the vane preform (121).