KR102056378B1 - Scroll compressor - Google Patents

Abstract

According to the present invention, a scroll compressor comprises: a first scroll; a second scroll rotated by being engaged to the first scroll to form a compression chamber between the first scroll and the second scroll; a frame fixed radially at the opposite side of the first scroll while leaving the second scroll between the frame and the first scroll to axially support the second scroll; and an Oldham ring having a ring portion formed in a ring shape and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to the frame or a key groove disposed in the second scroll to rotate the second scroll with respect to the first scroll. The key portion of the Oldham ring can be formed of the same material as the frame or the second scroll.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a compressor, and more particularly to a scroll compressor.

In the scroll type compressor, a motor of a rotating motor is installed inside a sealed casing, and a compression part consisting of a fixed scroll and a swinging scroll is installed on one side of the motor, and the motor and the compression part are connected to a rotating shaft to rotate the motor. This is delivered to the compression section. The rotational force transmitted to the compression unit makes the swing scroll pivotal to the fixed scroll to form two pairs of compression chambers, a suction chamber, an intermediate pressure chamber, and a discharge chamber. The refrigerant is sucked into both compression chambers and compressed and discharged simultaneously. That's the way.

Such a scroll compressor is provided with a rotation preventing mechanism for preventing the rotation of the rotating scroll. The anti-rotation mechanism may be an Oldham ring or a pin and ring.

The pin-and-ring method is advantageous over the Oldhamling method in that it can suppress the increase in reliability due to the durability of the anti-rotation mechanism and the weight increase of the compressor due to the anti-rotation mechanism. On the other hand, the pin-and-ring method is relatively disadvantageous in terms of assembly since a plurality of pins and rings must be installed on the turning scroll and the member in contact with each other. Therefore, researches to replace the pin-and-ring method by improving the material of Oldham ring are continuously conducted.

In particular, when the scroll compressor is applied to a vehicle air conditioning system, the old dam ring may be formed of aluminum in consideration of the weight and processability of the compressor. When aluminum is applied to the old dam ring, the weight of the old dam ring can be reduced, and workability and productivity can be increased, which is advantageous.

However, in consideration of the weight of the compressor, it is advantageous to manufacture not only the old dam ring but also the surrounding scroll wheel and main frame, or the fixed scroll made of aluminum. This is noticeably worse. Recently, a technique for improving wear reliability of the key part of Oldhamling has been introduced.

Prior art 1 (US 2017-0234313 A) is a technology that can form the ring portion and key portion of the Oldham ring differently to increase the wear resistance while reducing the weight of the Oldham ring. Prior art 2 (KR 10-1997-0021751) is a technique of surface treatment of the old dam ring to suppress the old wall ring from being welded to the swing scroll or fixed scroll.

However, in the conventional scroll compressor as described above, if the ring portion and the key portion of the Oldham ring are formed of different materials in consideration of the weight and wear reliability of the compressor, the manufacturing process is complicated because the ring portion and the key portion must be manufactured and assembled, respectively. there is a problem.

In addition, in the case of assembling the key portion by inserting the key portion, the cross-sectional area at the portion where the ring portion and the key portion are assembled is reduced, and thus the strength of the support for the key portion is weakened, which may lower the reliability of the old dam ring. In addition, play may occur at the coupling portion of the ring portion and the key portion due to a machining error or an assembly error when assembling the ring portion and the key portion, and as a result, the turning scroll may be circumferentially moved while the key portion is twisted with respect to the ring portion when the compressor is driven. have. As a result, gaps between the laps are generated, thereby increasing the compression loss, thereby degrading the compression efficiency.

In addition, when the ring portion and the key portion are heterogeneous materials, the thermal expansion coefficients of the ring portion and the key portion are different from each other, which may cause the key portion to be separated from the ring portion or to fail.

On the other hand, in the conventional scroll compressor, it is possible to form a coating layer with a lubricant on the surface of the old dam ring, which not only increases the manufacturing cost due to the formation of a separate coating layer, but also damages the old dam ring due to peeling or wear of the coating layer for a long time. Or increased frictional losses.

Prior Art 1: US published patent US 2017-0234313 A (2017.08.17) Prior Art 2: Korean Patent Publication No. 10-1997-0021751 (1997.05.28)

An object of the present invention is to provide a scroll compressor that can reduce the total weight of the compressor by lowering the weight of the old dam ring when the old dam ring is applied.

Furthermore, it is an object of the present invention to provide a scroll compressor that can form the old dam ring with the same material as the frame, the swing scroll, or the fixed scroll to which the old dam ring is coupled.

Further, it is an object of the present invention to provide a scroll compressor in which both members are formed of the same material and the old dam ring can be formed of the same material as both members to which the old dam ring is coupled.

Further, it is to provide a scroll compressor that can form the material of the ring portion and the key portion constituting the old dam ring with the same material.

In addition, another object of the present invention is to provide a scroll compressor that can improve the workability and productivity for the Oldham ring.

In addition, another object of the present invention is to suppress the occurrence of more than the allowable clearance between the key portion of the old dam ring and the frame, swing scroll, or the fixed scroll key groove coupled to the key portion of the scroll compressor can increase the compressor efficiency I'm trying to provide.

In addition, another object of the present invention is to provide a scroll compressor that can increase the reliability by securing the support strength of the key portion to the ring portion forming the old dam ring.

In addition, another object of the present invention is to provide a scroll compressor which can increase reliability by suppressing the key portion from being lost against the ring portion forming the old dam ring.

Another object of the present invention is to provide a scroll compressor which can form the ring portion and the key portion that constitute the old dam ring as a single unit.

In order to achieve the object of the invention, the first scroll; A second scroll engaged with the first scroll to pivot; And an old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll. Includes, the key portion of the Oldham ring may be provided with a scroll compressor, characterized in that formed of the same material as the second scroll.

Here, a reinforcing member made of a different material from the second scroll or the old dam ring may be provided between the key part and the key groove.

And, the reinforcing member may be inserted into the key portion to be coupled.

In addition, a separation preventing part may be formed between the reinforcing member and the member to which the reinforcing member is coupled to prevent the reinforcing member from being separated.

In addition, in order to achieve the object of the present invention, the first scroll; A second scroll engaged with the first scroll to form a compression chamber with the first scroll while pivoting; An old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll; And a reinforcing member coupled to the key part of the old dam ring and provided between the key groove of the second scroll and the key part of the old dam ring.

Here, the reinforcing member may be provided with a departure prevention portion to be inserted and fixed to the key portion.

The separation prevention part may be formed to be bent or protrude in a direction toward the key part, and the separation part may be formed in the key part so that the separation prevention part is inserted and fixed.

Here, the reinforcing member, a plurality of reinforcing surfaces facing both sides of the circumferential direction of the key portion; A connection surface facing the outer circumferential side of the key part by connecting each end of the plurality of reinforcement surfaces to each other; And a plurality of fixing surfaces that are bent toward the reinforcing surfaces facing each other at each other end of the plurality of reinforcing surfaces facing the inner circumferential side of the key portion.

In addition, a separation prevention groove having a predetermined depth in the radial direction may be formed on an inner circumferential side surface of the key part, and a separation prevention part bent toward the separation prevention groove may be formed on both fixing surfaces of the reinforcing member.

And, the inner circumferential side surface of the key portion is formed a separation prevention groove having a predetermined depth in the radial direction, the separation prevention groove is formed by opening one end in the axial direction, the both sides of the reinforcement member the separation prevention groove An anti-separation part that is bent toward may be formed.

And, the inner circumferential side of the key portion is formed a separation prevention groove having a predetermined depth in the radial direction, the separation prevention groove is formed with a locking surface in the shape blocked in the axial direction, both fixing surfaces of the reinforcing member is the separation Inserted into the prevention groove can be supported in the axial direction by the locking surface.

And, both sides of the circumferential direction of the key portion is provided with a separation preventing groove having a predetermined depth, the both sides of the reinforcing member may be formed in a projection shape so that the separation preventing portion is inserted into the separation preventing groove.

Here, the reinforcing member may be composed of a first reinforcing member provided to face the circumferential side of the key portion and a second reinforcing member provided to face the other circumferential side of the key portion.

In addition, the outer circumferential side surface and the inner circumferential side surface of the key portion are formed with a departure preventing groove having a predetermined depth in the opposite radial direction, respectively, the first reinforcing member and the second reinforcing member, respectively, facing both sides of the circumferential direction of the key portion Beam reinforcement surface, a plurality of fixing surfaces that are each bent at both ends of the reinforcement surface, it may be made of a plurality of departure prevention portion each bent toward the both departure prevention grooves in the plurality of fixing surfaces.

Here, the reinforcing member, the connection surface facing the axial one side of the key portion; And a plurality of fixing surfaces that are bent at both ends of the connection surface to face both sides of the circumferential direction of the key portion.

Here, the reinforcing member may be formed by bending a plate having rigidity to contact at least three or more surfaces of the side of the key portion.

The key part of the old dam ring may be formed of the same material as the second scroll, and the reinforcing member may be formed of a key material of the second scroll or the key part of the old dam ring.

The key ring and the ring portion may be formed of the same material.

In addition, the old dam ring may have the ring portion and the key portion formed in a single body.

In the scroll compressor according to the present invention, as the reinforcing member is provided between the key part of the old dam ring and the key groove of the frame or swing scroll or the fixed scroll into which the key part is inserted, the old dam ring is brought into direct contact with the frame or swing scroll or the fixed scroll. Can be prevented. Accordingly, the ring portion and the key portion constituting the old dam ring can be made of aluminum made of light material, thereby reducing the weight of the old dam ring and the compressor to which the old dam ring is applied.

Furthermore, the old dam ring of the scroll compressor according to the present invention may be formed of the same material as the frame, the swing scroll, or the fixed scroll to which the key part of the old dam ring is coupled, and may prevent deterioration of friction characteristics due to friction between the same materials. . Accordingly, not only can the friction between the old dam ring or the member to which the old dam ring is coupled can be suppressed, and the damage to the old dam ring or the counterpart can be suppressed, and the frictional loss can be reduced to increase the compressor efficiency.

Furthermore, the old dam ring of the scroll compressor according to the present invention may be easily manufactured by forming the ring part and the key part constituting the old dam ring as a single body. In addition, it is possible to suppress the phenomenon that the key portion of the old dam ring in the key groove of the counterpart when the compressor is driven, thereby suppressing the rotation of the turning scroll in the circumferential direction, thereby reducing the compression loss caused by the gap between the laps. In addition, the strength of the root portion of the key portion protruding from the ring portion can be secured, thereby preventing the key portion from being damaged and improving the reliability.

Furthermore, the old dam ring of the scroll compressor according to the present invention, since the ring portion and the key portion constituting the old dam ring are formed of a single body and the same material, even if the old dam ring is heated when the compressor is driven, the key portion is excessively deformed or misplaced. Can be prevented. Accordingly, it is possible to prevent the swing scroll from becoming unstable due to the Old Daming.

In addition, the scroll compressor according to the present invention is provided with a reinforcing member between the key portion of the old dam ring and the key groove of the frame or swinging scroll or the fixed scroll into which the key portion is inserted, and is separated between one end of the reinforcing member and the corresponding key portion. It is possible to fix the reinforcing member by forming a prevention portion. Accordingly, it is possible to effectively suppress the reinforcement member from being separated from the key portion and to increase the reliability.

Furthermore, projections in the reinforcing member may be provided with grooves corresponding to the key portions, respectively, to suppress separation of the reinforcing member. This simplifies the shape of the reinforcing member and the key portion to which the reinforcing member is coupled to reduce the manufacturing cost.

Furthermore, the separation prevention groove is formed in the key portion, the axial direction of the separation prevention groove may be formed in an open shape. This facilitates assembly of the reinforcing member by pushing the reinforcing member in the axial direction.

Furthermore, the separation prevention groove may be formed in the key portion, but the axial direction of the separation prevention groove may be blocked and formed in an open shape in both circumferential directions. Through this, it is not necessary to be formed by bending separate departure prevention parts at both ends of the reinforcing member can facilitate the manufacture and assembly of the reinforcing member.

Furthermore, the reinforcing member may be formed to be inserted in the axial direction. This can facilitate the assembly of the reinforcing member.

Furthermore, a plurality of reinforcing members may be formed and assembled in both circumferential directions of the key portion. As a result, assembling of the reinforcing member may be facilitated.

Furthermore, the reinforcing member may be fixed by elasticity. This can facilitate the assembly of the reinforcing member.

1 is a cross-sectional view showing the interior of an electric compressor as an example of a scroll compressor according to the present invention;
Figure 2 is a cross-sectional view showing a state in which the old dam ring is coupled between the frame and the swing scroll in the compression unit according to FIG.
3 is an exploded perspective view of the compression unit according to FIG. 2;
4 is an exploded perspective view illustrating a state in which the reinforcing member is separated from the old dam ring in the compression unit according to FIG. 3;
5 is a perspective view showing a state in which the reinforcing member is coupled to the old dam ring in FIG.
6 is a cross-sectional view showing a radially inserted state of the reinforcing member to the old dam ring in Figure 5 inserted into the key groove of the swing scroll;
Figure 7A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment,
7B is a cross-sectional view of the reinforcing member coupled to the key portion of the Oldham ring in FIG. 7A;
8A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment;
8B is a cross-sectional view of the reinforcing member coupled to the key portion of the Oldham ring in FIG. 8A;
9A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment;
9B is a cross-sectional view of the reinforcing member coupled to the key portion of the Oldham ring in FIG. 9A;
10A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment;
10B is a cross-sectional view of the reinforcing member coupled to the key portion of the Oldham ring in FIG. 10A;
11A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment;
11B is a cross-sectional view of the reinforcing member coupled to the key portion of the Oldham ring in FIG. 11A;

Hereinafter, the scroll compressor according to the present invention will be described in detail with reference to the embodiment shown in the accompanying drawings.

1 is a cross-sectional view showing the interior of the electric compressor as an example of the scroll compressor according to the present invention, Figure 2 is a cross-sectional view showing a state in which the old dam ring is coupled between the frame and the swing scroll in the compression unit according to FIG.

As shown in these figures, the scroll compressor according to the present embodiment, the compression unit for compressing the refrigerant by using the rotational force of the drive motor 103 and the drive motor 103, which is an electric drive inside the compressor casing 101. It consists of 105.

The compressor casing 101 is provided with an inlet port 111a to which the suction pipe is connected and an exhaust port 121a to which the discharge pipe is connected, and an inlet port S1 is provided at the inlet port 111a, and a discharge space S2 is provided at the exhaust port 121a. Are communicated with each other. The driving motor 103 is installed in the suction space S1, and the compressor of this embodiment forms a low pressure compressor.

The compressor casing 101 includes a main housing 110 in which the drive motor 103 is installed, and a rear housing 120 coupled to an open rear end of the main housing 110. The inner space of the main housing 110 forms the suction space S1 together with one side of the compression unit 105, and the inner space of the rear housing 120 together with the other side of the compression unit 105 discharge space ( S2) is formed. The exhaust housing 121a is formed in the rear housing 120.

The main housing 110 has a cylindrical portion 111 is formed in a cylindrical shape, the front end of the cylindrical portion 111 is formed with a sealing portion 112 which is integrally extended and closed, the front surface of the sealing portion 112 Inverter module 200 may be combined. The rear end of the cylindrical portion 111 is opened so that the rear housing 120 is sealed.

On the other hand, the inside of the main housing 110, the drive motor 103 constituting the transmission unit is pressed in and coupled. The drive motor 103 includes a stator 131 fixed inside the main housing 110 and a rotor 132 positioned inside the stator 131 and rotated by interaction with the stator 131. .

The stator 131 is fixed to the inner circumferential surface of the main housing 110 by shrinking a stator core (unsigned). The rotor 132 is coupled to the rotary shaft 133 is pressed into the inner circumferential surface of the rotor core (unsigned).

The rotating shaft 133 is coupled to the center of the rotor 132, the rear end toward the compression unit 105 is supported in a cantilevered form in the frame 140 and the fixed scroll 150 to be described later.

On the other hand, the compression unit 105 is provided between the frame 140, the fixed scroll (hereinafter referred to as the first scroll) 150, which is supported by the frame 140, and between the frame 140 and the first scroll 150 It includes a swing scroll (hereinafter referred to as a second scroll) 160 for the swing movement.

The frame 140 is coupled to the front opening end of the main housing 110, the first scroll 150 is fixedly supported on the rear surface of the frame 140, and the second scroll 160 is the first scroll 150. And is pivotally supported on the rear surface of the frame 140 to pivot between the frame 140. In addition, the second scroll 160 is eccentrically coupled to the rotating shaft 133 coupled to the rotor 132 of the drive motor 103, while the first scroll 150 rotates with respect to the first scroll 150. And two pairs of compression chambers V formed of a suction chamber, an intermediate pressure chamber, and a discharge chamber.

In addition, the frame 140 has a disk-shaped frame portion 141 is formed in a disk shape, and protrudes toward the first scroll 150 from the rear surface of the frame plate 141, the side wall of the first scroll 150 to be described later The frame sidewall portion 142 to which the addition 152 is coupled is formed.

In addition, a frame thrust surface 143 on which the second scroll 160 is mounted and supported in the axial direction is formed inside the frame side wall part 142, and is compressed in the compression chamber V at the center of the frame thrust surface 143. A portion of the refrigerant to be filled is filled with the oil to form a back pressure space 144 supporting the rear surface of the second scroll 160. Accordingly, the pressure in the back pressure space 144 forms an intermediate pressure between the pressure in the suction space S1 and the final pressure (that is, the discharge pressure) of the compression chamber V.

In the middle of the back pressure space 144, a frame shaft hole 145 through which the rotating shaft 133 penetrates is formed, and a first bearing (unsigned) is provided on the inner circumferential surface of the frame shaft hole 145. The first bearing may be made of a bush bearing, but may be made of a ball bearing in some cases. However, bush bearings are less expensive than ball bearings and are advantageous in terms of cost, and can be advantageous because they are easy to assemble and reduce weight and noise.

A second key groove 146 is formed inside the frame thrust surface 143 to slide the second key portion 176 of the Old Dam ring 170 to be described later. Two second key grooves 146 are usually formed at 180 ° intervals. The second key groove will be described later together with the reinforcing member.

Meanwhile, the first scroll 150 may be fixedly coupled to the frame 140 or press-fitted into the casing 110.

The first scroll 150 has a fixed scroll hard plate portion (hereinafter, the fixed side hard plate portion) 151 having a substantially disk shape, and the side wall portion 142 of the frame 140 is formed at an edge of the fixed side hard plate portion 151. The fixed scroll side wall portion (hereinafter referred to as a first side wall portion) 152 is formed. A fixed side wrap 153 is formed on the front surface of the fixed side plate part 151 to form a compression chamber V in engagement with the turning side wrap 162 to be described later.

A suction passage (not shown) is formed at one side of the first side wall portion 152 so that the suction space S1 and the suction chamber (not shown) are communicated with each other, and a central portion of the fixed side plate portion 151 is connected to the discharge chamber. A discharge port 155 through which the compressed refrigerant is discharged into the discharge space S2 is formed.

On the other hand, the second scroll 160 is provided between the frame (frame) and the first scroll 150, may be provided to be pivotally coupled to the rotation axis 133 eccentrically.

The second scroll 160 has a rotating scroll plate (hereinafter referred to as a rotating side plate) 161 having a substantially disk shape, and is engaged with the fixed side wrap 153 on the rear surface of the rotating side plate 161 to be compressed. The turning side wrap 162 forming a thread is formed. The pivoting wrap 162 may be formed in an involute shape together with the fixed wrap 153, but may be formed in various other shapes.

Moreover, the scroll side thrust surface 165 which forms a thrust surface together with the frame side thrust surface 143 is formed in the front surface of the turning side hard board part 161. As shown in FIG. However, since the second scroll 160 floats with respect to the frame 140 when the compressor is driven, the frame side thrust surface 143 and the scroll side thrust surface 165 are substantially in contact with each other. Rather, the frame 140 and the second scroll 160 form a thrust surface with the ring portion 171 of the Oldham ring 170 to be described later.

In addition, a first key groove 166 is formed in the middle of the scroll side thrust surface 165 in which the first key portion 175 of the Old Dam Ring 170 to be described later is inserted. Two first key grooves 166 are formed at intervals of 180 °. In the axial projection, the first keyway 166 is formed with a phase difference of about 90 ° with the second keyway 146. The first key groove will be described later together with the reinforcing member.

On the other hand, between the frame 140 and the second scroll 160, the anti-rotation mechanism for preventing the rotational movement of the second scroll 160 is installed. In some cases, the anti-rotation mechanism may be installed between the first scroll 150 and the second scroll 160. Hereinafter, a case where the anti-rotation mechanism is installed between the frame 140 and the second scroll 160 will be described as an example.

As described above, the anti-rotation mechanism may be applied to the pin-and-ring type or the all-damping type. This embodiment is for the case where the Olddaming type is applied.

The old dam ring 170 includes an annular ring portion 171 and a first key portion 175 and a second key portion 176 protruding from both sides in the axial direction of the ring portion 171. The structure of the Oldham ring will be described later together with the reinforcing member.

In the drawings, reference numeral 137 denotes a balance weight and 180 denotes a reinforcing member.

The scroll compressor according to the present embodiment as described above is operated as follows.

That is, when power is applied to the driving motor 103, the rotating shaft 133 rotates together with the rotor 132 to transmit rotational force to the second scroll 160, and the second scroll 160 is a rotating protector. Since the swinging motion by the job Oldham ring 170, the compression chamber (V) is continuously moved toward the center side is reduced in volume.

Then, the refrigerant flows into the suction space S1 through the inlet 111a, and the refrigerant introduced into the suction space S1 is a flow path or stator formed on the outer circumferential surface of the stator 131 and the inner circumferential surface of the main housing 110. Passed through the gap between the 131 and the rotor 132 is sucked into the compression chamber (V) through the suction flow path (154).

In this case, a part of the refrigerant sucked into the suction space S1 through the inlet 111a comes into contact with the sealing part 112, which is the front surface of the main housing 110, before passing through the driving motor 103. Therefore, the sealing part 112 is cooled by heat exchange with the cold suction refrigerant, thereby dissipating the inverter module 200 attached to the sealing part 112 of the main housing 110.

Meanwhile, the refrigerant sucked into the compression chamber V through the suction space S1 is compressed by the first scroll 150 and the second scroll 160 to be discharged to the discharge space S2 through the discharge port 155. The refrigerant discharged into the discharge space S2 is separated from the oil in the discharge space S2, and the refrigerant is discharged into the refrigeration cycle through the exhaust port 121a, while the oil is collected in the lower portion of the discharge space S2 and flows into the oil flow path. Through the (not shown) it is supplied to each bearing surface or to the compression chamber.

At this time, some oil is introduced between the frame 140 and the second scroll 160, and between the frame 140 or the second scroll 160 to which the old dam ring 170 and the old dam ring 170 are coupled. Lubricate.

On the other hand, such a scroll compressor is widely applied to the air conditioning system in the vehicle as well as in the building air conditioning system. Scroll compressors, like other compressors, can increase the compressor efficiency by reducing the weight of the moving member. In particular, when installed in a vehicle, it is advantageous to reduce the weight of the compressor since the weight of the entire compressor as well as the rotating member is related to the weight of the vehicle.

Accordingly, in a scroll compressor applied to a vehicle (commonly referred to as an electric scroll compressor), a casing, a frame, and a fixed scroll and a swing scroll as well as an old dam ring can be made of a lightweight material such as aluminum (aluminum alloy).

However, as described above, when the frame or the turning scroll contacting the old dam ring including the old dam ring is formed of an aluminum material, unlike cast iron, friction characteristics according to the same material may be very poor.

In view of this, the ring and key parts of the Olddam ring may be formed by assembling different materials, or the whole Olddam ring may be formed of the same material, and then the coating layer may be formed on the surface of the Olddam ring to improve friction characteristics. Can be. However, these methods had limitations in workability and reliability as described above.

Thus, the present invention is to form the entire Oldham ring made of the same material to increase the workability for the Oldham ring, while forming the frame or swing scroll to which the Oldham ring is combined with the Oldham ring and the same material, but the friction characteristics according to the same material is reduced It is intended to ensure the reliability of the compressor by preventing it from happening in advance.

3 is an exploded perspective view illustrating the compression unit according to FIG. 2, and FIG. 4 is an exploded perspective view illustrating a state in which the reinforcing member is separated from the old dam ring in the compression unit according to FIG. 3, and FIG. 5 is a reinforcement of the old dam ring in FIG. 4. 6 is a perspective view illustrating a state in which a member is coupled, and FIG. 6 is a cross-sectional view illustrating a state in which a reinforcing member is coupled to an old dam ring in FIG. 5 and inserted into a key groove of a turning scroll.

As shown in the drawing, the frame 140, the second scroll 160, and the old dam ring 170 according to the present embodiment are all formed of an aluminum material that is lighter than cast iron. The specific gravity of cast iron is about 7.85, and the specific gravity of aluminum alloy is about 2.8. Therefore, when the frame, the second scroll, and the old dam ring are all made of aluminum, the weight of the compressor can be greatly reduced.

The old dam ring 170 may include an annular ring portion 171, a first key portion 175, and a second key portion 176 protruding from both sides in the axial direction of the ring portion 171. The first key portion 175 is formed on one side in the axial direction of the ring portion 171, and the second key portion 176 is formed on the other side in the axial direction of the ring portion 171. The plurality of first key portions 175 and second key portions 176 are formed at intervals of 180 ° in the circumferential direction, respectively, so that the first key portion 175 and the second key portion 176 are mutually different in the axial projection. Are formed at 90 ° to each other.

The first key portion 175 and the second key portion 176 are each formed in a rectangular cross-sectional shape extending in the radial direction. However, in some cases, the first key portion 175 and the second key portion 176 may be formed in a shape having a square cross section or a similar length. This will be described later along with the keyway.

The ring portion 171 and the key portions 175 and 176 are formed in one piece. That is, the first key portion 175 and the second key portion 176 are integrally extended from the ring portion 171. Accordingly, the ring part 171 and the key parts 175 and 176 may be formed of the same material, that is, the entire Oldham ring is made of aluminum.

Meanwhile, a plurality of first key grooves 166 corresponding to the first key portion 175 of the old dam ring 170 is provided in the second scroll 160, and a second key portion 176 of the old dam ring 170 is provided in the frame 140. ) And a plurality of second key grooves 146 are respectively formed. The plurality of first key grooves 166 and the second key grooves 146 are respectively formed on surfaces facing each other.

The first key groove 166 of the second scroll 160 and the second key groove 146 of the frame 140 are radially compared with the first key portion 175 and the second key portion 176 of the Oldham ring 170. Is formed long enough, and is formed to have a width almost in contact with the side surfaces of the first key portion 175 and the second key portion 176 in the circumferential direction.

Accordingly, the first key portion 175 and the second key portion 176 of the old dam ring 170 have radii around the first key groove 166 of the second scroll 160 and the second key groove 166 of the frame 160. It can slide in the direction while transmitting force in the circumferential direction.

Thus, the present embodiment includes the circumferential side of the first key groove 166 and the circumferential side of the first key portion 175, the circumferential side of the second key groove 146 and the circumferential side of the second key portion 176. Between the reinforcing members 180, 180 may be inserted respectively. That is, although the reinforcing members 180 and 180 may be inserted into and fixed to the inner surfaces of the first key groove 166 and the second key groove 146, the first key portion 175 and the second key portion as in the present embodiment. It may be inserted into and fixed to an outer side of 176.

The reinforcing members 180 and 180 according to the present embodiment are made of a material having a higher rigidity than that of the second scroll 160, the frame 140, or the Oldham ring 170, that is, the second scroll 160 or the frame 140. Or it may be preferably formed of a different material with Oldham ring 170. Then, when the first key portion 175 and the second key portion 176 slides with respect to the first key groove 166 and the second key groove 146, respectively, the same key material may be blocked from being directly in contact with the key groove. have. Then, the second scroll 160, the frame 140 or the Oldham ring 170 are all made of a light material while the key groove of the second scroll 160 or the frame 140 or the key portion of the Oldham ring 170 are worn out. Can be suppressed.

Hereinafter, the reinforcing member and the key groove into which the reinforcing member is inserted will be described in detail. The first key groove, the first key portion, and the reinforcement member provided between them are the same as the second key groove, the second key portion, and the reinforcement member provided therebetween, respectively. Therefore, a description will be given focusing on the reinforcement member inserted between the first key groove and the first key portion and the first key groove and the first key portion.

Referring again to FIGS. 3 and 4, the first key portion 175 has a length in the radial direction longer than the length in the circumferential direction (or tangential direction). Here, both sides in the radial direction are defined as the outer circumferential side surface 175a and the inner circumferential side surface 175b, and both sides in the circumferential direction are defined as the sliding side surface 175c. Accordingly, the first key portion 175 according to the present embodiment has a length between the outer circumferential side surface 175a and the inner circumferential side surface 175b longer than the length between the two sliding side surfaces 175c. However, the present invention is not limited thereto, and the two lengths may be the same or vice versa.

The first key portion 175 according to the present embodiment is formed on the outer circumferential side surface 175a and both sliding side surfaces 175c in a flat plane shape, and the inner circumferential side surface 175b prevents separation of the first reinforcing member 180a to be described later. An escape preventing groove 175b1 may be formed to insert and catch the portions 185a and 185b.

The departure preventing groove 175b1 may be formed in a groove shape recessed to a predetermined depth in the center portion of the inner circumferential side surface 175b as shown in FIGS. 4 to 6. That is, the separation preventing groove 175b1 is formed lower than both sliding side surfaces 175c with respect to the separation preventing groove 175b, and is formed lower than the side of the axial side facing the ring portion 171. Accordingly, the departure preventing groove 175b1 may be formed in a shape in which both the axial side and the circumferential side are blocked.

In addition, the departure preventing groove 175b1 may be formed in a rectangular cross-sectional shape when projecting the inner circumferential surface side, and in some cases, may be formed in a circular cross-sectional shape. However, in the case of a circular cross-sectional shape, it may be advantageous when the axial width of the reinforcing member to be described later is small or when the axial width of the departure preventing part is small in the reinforcing member. In the case where the width of the reinforcing member 180 is large, the separation preventing groove 175b1 may be advantageously formed in a rectangular cross-sectional shape.

In addition, the separation prevention groove 175b1 is preferably formed such that its radial cross-sectional area is larger than the total longitudinal cross-sectional area of the separation prevention portions 185a and 185b of the reinforcing member 180 inserted into the separation prevention groove 175b1. . For example, both separation prevention portions 185a and 185b of the first reinforcing member 180a are inserted into the separation prevention groove 175b1 when viewed radially from the inner circumferential surface of FIGS. 5 and 6 and the old dam ring 170. In this case, the area of the separation preventing groove 175b1 may be wide enough to create an empty space between the two separation preventing portions 185a and 185b. Then, the empty space of the separation prevention groove 175b1 formed between both the separation prevention portions 185a and 185b acts as a kind of oil storage groove so that the oil introduced into the first key groove 166 is in the separation prevention groove 175b1. Can be soaked. Then, when the compressor is running, oil may be lubricated between the key groove and the key part due to the oil contained in the empty space of the separation preventing groove 175b1, and may store the oil when the driving is stopped.

On the other hand, the first reinforcing member 180a according to the present embodiment may be formed by bending a metal plate or by molding a polymer material. The first reinforcing member 180a is preferably formed to have a predetermined elasticity since the first reinforcing member 180a needs to be fixed in the inserted state on the outer surface of the first key portion 175. To this end, the first reinforcing member 180a may be formed to have a narrower width at the ends of the fixing surfaces 183a and 183b than at the ends of the connection surface 182, which will be described later. Then, both fixing surfaces 183a and 183b, which are opened by opening the fixing surfaces 183a and 183b to both sides and inserted into the first key portion 175, are firmly fixed to the first key portion 175 while being lifted by the restoring force. can do.

As shown in FIG. 4, the first reinforcing member 180a according to the present embodiment includes a first reinforcing surface 181a, a second reinforcing surface 181b, a connecting surface 182, and a first fixing surface 183a and a second. It may be made of a fixed surface (183b).

The first reinforcement surface 181a and the second reinforcement surface 181b are arranged to be parallel to each other in the radial direction and are formed to surround both sliding side surfaces of the first key portion 175. The connection surface 182 is formed to connect between one end of the first reinforcement surface 181a and one end of the second reinforcement surface 181b to surround the outer circumferential side surface 175a of the first key portion 175. The fixing surfaces 183a and 183b extend from the other end of the first reinforcing surface 181a and the other end of the second reinforcing surface 181b opposite to the connecting surface 182, respectively. It is formed to surround 175b.

The first reinforcing surface 181a and the second reinforcing surface 181b are formed to be flat and closely adhered to both sliding side surfaces 175c and 175c of the first key portion 175, respectively, and the outside of the first reinforcing surface 181a. The side surfaces and the outer surfaces of the second reinforcing surfaces 181b may be disposed to face each other at predetermined lubrication intervals on both circumferential inner surfaces of the first key groove 166.

As described above, the connection surface 182 may be closely coupled to the outer circumferential side surface 175a of the first key portion 175. However, in some cases, the inner circumferential side surface 175b of the first key portion 175 may be closely coupled to each other. In this case, the separation preventing groove 175b1 is formed in the outer circumferential side surface 175a of the first key portion 175.

The first fixing surface 183a is directed toward the second reinforcing surface 181b from the other end of the first reinforcing surface 181a, and the second fixing surface 183b is the first at the other end of the second reinforcing surface 181b. It is bent and formed in the direction toward the reinforcement surface 181a, respectively. The first fixing surface 183a and the second fixing surface 183b may be fixed to the inner circumferential side surface 175b of the first key part 175, respectively.

Further, at the end of the first fixing surface 183a and the end of the second fixing surface 183b, the first departure preventing portion 185a and the second departure preventing portion 185b that are bent toward the separation preventing groove 175b1 are provided. Can be bent. The first departure prevention part 185a and the second departure prevention part 185b may be inserted in both transverse directions of the departure prevention groove 175b1 and hung in the axial direction. As described above, an empty space is formed between the first departure preventing part 185a and the second separation preventing part 185b by a predetermined interval, and the empty space forms the storage groove described above.

On the other hand, as described above, the second key groove 146 may be formed in the frame 140 so that the second key portion 176 of the Olddam ring 170 is slidably inserted. The reinforcing member 180b may be coupled to the second key portion 176, the separation preventing groove may be formed in the second key portion 176, and the separation preventing portion may be formed in the reinforcing member 180b, respectively.

Referring again to FIG. 2, the second keyway 146 of the frame 140 and the second key part 176 of the old dam ring 170 also have the first key groove 166 and old dam ring of the second scroll 160 described above. It may be formed in the same shape as the first key portion 175 of (170).

However, the second key groove 146 and the second key portion 176, and the second reinforcing member 180b inserted between the second key groove 146 and the second key portion 176 may include the first key groove 166 described above. Compared with the first reinforcing member 180a inserted between the first key portion 175 and the first key groove 166 and the first key portion 175, only the inner side and the outer side thereof are reversed, and the shape thereof is same.

In addition, the shape of the second reinforcing member (180b) and the shape of the separation prevention portion, including the separation prevention groove for preventing the separation of the second reinforcing member (180b) is also the same as the above-described embodiments. Therefore, the detailed description thereof will be replaced with the description of the reinforcement member coupled to the first key portion and the first key portion.

As described above, the scroll compressor according to the present embodiment has the following effects.

That is, the first and second reinforcing members 180a and 180b are inserted between the first key groove 166 and the first key portion 175 and between the second key groove 146 and the second key portion 176, respectively. As a result, the first key portion 175 of the Oldham ring 170 is positioned in the first keyway 166 of the second scroll 160, and the second key portion 176 of the Old Damring 170 is formed in the frame 140. 2 can be blocked directly in contact with the key groove (146).

Accordingly, even if the second scroll 160, the frame 140, and the old dam ring 170 are all formed of the same material, in particular, an aluminum material having a lower hardness than cast iron, between the second wall 160 and the second scroll 160, and Deterioration of the friction characteristics between the old dam ring 170 and the frame 140 can be suppressed, thereby improving the reliability of the compressor.

In addition, since the second scroll 160, the frame 140, and the Oldham ring 170 are all made of a light aluminum material, the weight of the compressor can be reduced. The efficiency can be improved.

In addition, since the ring portion 171 and the key portions 175 and 176 of the old dam ring 170 are formed in a single body, the connection portion between the ring portion and the key portion can be sufficiently reinforced. Accordingly, the connection between the ring portion 171 and the key portions 175 and 176 can be suppressed from being damaged by force, thereby increasing the reliability of the compressor.

In addition, as the ring portion 171 and the key portions 175 and 176 of the old dam ring 170 are formed in a single body, processing errors or key portions 175 and 176 between the ring portion 171 and the key portions 175 and 176 are provided. ) Deformation can be minimized. Accordingly, it is possible to minimize the compression loss due to the separation between the lap by minimizing the twisting of the key portion in the unwanted direction in the key groove when the compressor is driven.

In addition, since it is not necessary to form a separate coating layer on the surface of the olddam ring 170, it is possible to lower the manufacturing cost for the olddam ring 170 and to suppress damage or frictional loss of the old dam ring due to peeling of the coating layer.

In addition, as described above, in the embodiment, the separation preventing groove may form a kind of storage space. Then, a certain amount of oil can be stored during operation of the compressor as well as at a stop, and the stored oil can flow between the key groove and the key portion, more precisely between the key portion and the reinforcing member to lubricate. This can suppress the wear of the key portion more effectively.

On the other hand, if there is another embodiment of the structure for fixing the reinforcing member according to the present invention.

That is, in the above-described embodiment, the departure prevention groove is formed in the axial direction, but in this embodiment, the departure prevention groove is formed in the axial direction. FIG. 7A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment, and FIG. 7B is a cross-sectional view showing the reinforcing member coupled to the key portion of the old dam ring in FIG. 7A.

As shown in the drawing, the separation preventing groove 275b1 according to the present embodiment is formed on the inner circumferential side surface 275b of the first key portion 275, but is formed to extend by a predetermined length along the axial direction on one side in the axial direction. Can be. Accordingly, the escape preventing grooves 275b1 have a closed shape on both sides of the circumferential direction, but an open shape on one side of the axial direction on the side facing the ring portion 271.

In this case, the reinforcing member 280 may be formed by extending and leaving the separation prevention parts 285a and 285b toward the connection surface 282 on both fixing surfaces 283a and 283b as described above. Other configurations for the reinforcing member 280 may be formed in the same manner as the above-described embodiment.

As described above, as the separation preventing groove 275b1 is formed in a shape in which the axial one side surface 275b2 is opened in the inner circumferential side surface 275b of the first key portion 166, the reinforcing member 280 is formed in the first key portion ( 275) can be easily assembled. That is, in the above-described embodiment, as the separation preventing groove 175b1 is formed in the circumferential direction as well as the axial direction in the inner circumferential side surface 175b of the first key portion 175, when assembling the reinforcing member 180, Since both reinforcement surfaces 181a and 181b should be inserted into the first key portion 175, it is not easy to insert the separation prevention portions 185a and 185b into the separation prevention grooves 175b1. However, when one side of the separation prevention groove 275b1 is formed in an open shape as in the present embodiment, the reinforcement member 280 can be pushed in the axial direction to assemble the separation prevention parts 285a and 285b. It can be easily assembled in the prevention groove 275b1.

On the other hand, there is another embodiment of the structure for fixing the reinforcing member according to the present invention as follows.

That is, in the above embodiments, both sides of the circumferential direction of the departure prevention groove are formed in a clogged shape, but in the present embodiment, both sides of the circumferential direction of the departure prevention groove are formed in an open shape. 8A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment, and FIG. 8B is a cross-sectional view showing the reinforcing member coupled to the key portion of the old dam ring in FIG. 8A.

As shown in the drawing, the separation preventing groove 375b1 according to the present exemplary embodiment may be formed in a blocked shape on one side in the axial direction facing the ring portion 371, and both sides in the circumferential direction may be formed in an open shape. Accordingly, the engaging surface 375b2 is formed on one side of the separation preventing groove 375b1 in the axial direction, and the reinforcing member 380 may be supported in the axial direction by the ring part 371 and the engaging surface 375b2.

In this case, unlike the above-described embodiments, the reinforcing member 380 may not have a departure preventing part. That is, as both fixing surfaces 383a and 383b of the reinforcing member 380 are inserted into and closely contacted to the separation preventing groove 375b1, the first key portion 375 may be formed even when the separation preventing portion is not formed in the reinforcing member 380. ) Can be firmly fixed to the reinforcing member (380).

As described above, when both sides of the circumferential direction of the departure prevention grooves 375b1 are formed in an open shape, it is not necessary to form a separate departure prevention part in the reinforcement member, thereby simplifying the manufacture of the reinforcement member 380, Assembly can be facilitated.

Furthermore, when the depth of the departure preventing groove 375b1 is greater than or equal to the thickness of the reinforcing member 380, the fixing surface 385b2 of the reinforcing member 380 may be completely embedded in the key portion 375. have. Accordingly, it is not necessary to reduce the length of the key portion 375 in consideration of the reinforcing member 380, and the sliding area between the key portions 375 and 376 and the key grooves 166 and 146 can be secured. 2 It may be advantageous to miniaturize the compressor by preventing the expansion of the outer diameter of the scroll or frame.

Although not shown in the drawings, other embodiments described above or embodiments described later may form grooves in the circumferential direction (lateral direction) on the inner circumferential side or the outer circumferential side of the key portion. Then, as described above, the reinforcing member may be embedded in the key portion to secure the sliding area between the key portion and the key groove without increasing the length of the key portion.

On the other hand, there is another embodiment of the structure for fixing the reinforcing member according to the present invention as follows.

That is, in the above embodiments, the fixing surfaces are provided at both ends of the reinforcing member so as to be in close contact with the inner circumferential side or the outer circumferential side of the key portion in the axial direction. To be fixed on. 9A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment, and FIG. 9B is a cross-sectional view showing the reinforcing member coupled to the key portion of the old dam ring in FIG. 9A.

As shown here, the reinforcing member 480 according to the present embodiment includes a first reinforcing surface 481a and a second reinforcing surface 481b, and a first reinforcing surface 481a and a second reinforcing surface 481b. It may be formed between the connecting surface 482 surrounding the outer peripheral side surface of the first key portion 475.

The distance between the first reinforcement surface 481a and the second reinforcement surface 481b may be narrower toward the opposite end with respect to the connection surface 482. Accordingly, when the reinforcing member 480 is inserted into the first key portion 475, the open ends of the first reinforcing surface 481a and the second reinforcing surface 481b, which are opened, are elastically restored, and the first key portion 475 It can be fixed in close contact with both sides of the circumferential direction.

In this case, in order to prevent the reinforcing member 480 from being detached, the reinforcing member 480 is provided with a departure preventing part 485a and 485b, and the first key part facing the departure preventing part 485a and 485b ( On both sliding surfaces 475a and 475b of the 475, the separation preventing grooves 475c1 and 475c1 into which the separation preventing portions 485a and 485b may be inserted may be formed.

The anti-separation portions 485a and 485b may be formed in a protrusion shape protruding toward the first key portion 475. It may be formed in a corresponding recess (recess) shape.

The departure preventing parts 485a and 485b may be formed on the first reinforcing surface 481a and the second reinforcing surface 481b, but in some cases, are formed on only one reinforcing surface or on the connection surface 482. It may be formed.

As described above, no fixing surface is formed on the reinforcing member 480, and the reinforcing member 480 is fixed to the key portion 475 only by the elasticity of the reinforcing surfaces 481a and 481b, or the reinforcing surface 481a ( In the case where the projection-shaped separation prevention portions 485a and 485b are formed in the 481b, the reinforcement member 480 and the key portion 475 can be easily manufactured and assembled. In addition, the sliding area between the key portion 475 and the key groove 166 can be secured without increasing the length of the key portion 475, which can be advantageous in miniaturizing the compressor.

On the other hand, there is another embodiment of the structure for fixing the reinforcing member according to the present invention as follows.

That is, in the above-described embodiments, one reinforcement member is inserted and coupled to one key part, but in the present embodiment, a plurality of reinforcement members are inserted and coupled to one key part. 10A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment, and FIG. 10B is a cross-sectional view showing the reinforcing member coupled to the key portion of the old dam ring in FIG. 10A.

As shown in the drawing, a plurality of reinforcing members 580 according to the present exemplary embodiment may be provided and coupled to both side surfaces of the first key part 575 in the circumferential direction. In this case, the first key portion 575 is formed in the outer circumferential side surface 575a and the inner circumferential side surface 475b, respectively, and the separation preventing grooves 575a1 and 475b1 are formed. The separation prevention parts 585a and 585a of 580 may be inserted and fixed, respectively.

The reinforcing member 580 is formed by bending the fixing surfaces 583a and 583b on both ends of the first reinforcing surface 581a or the second reinforcing surface 581b, respectively, unlike the embodiments described above. At the ends of the 583a and 583b, the separation preventing portions 585a and 585b may be bent in a radial direction in a direction facing each other toward the respective separation preventing grooves 575a1 and 575b1. The separation prevention portions 585a and 585b may be inserted into and fixed to the separation prevention grooves 575a1 and 575b1.

Here, the departure prevention grooves 575a1 and 575b1 may be formed in the middle of the outer circumferential side surface 575a and the inner circumferential side surface 575b of the first key portion 575 as in the present embodiment. Like the embodiment of 7A, it may be formed in an axially open shape. In addition, as shown in the embodiment of Fig. 9A, protrusions are formed on the reinforcing surfaces, and grooves are formed on the sliding surfaces, respectively, to prevent separation of the reinforcing members, and as shown in the embodiment of Fig. 11A to be described later, the first fixing surface 583a and The reinforcing member may be fixed to the key portion by the elasticity of the second fixing surface 583b. Since these embodiments are the same as the above-described embodiments, description thereof will be omitted.

As described above, when the reinforcing member is composed of a plurality of reinforcing members 580, the lengths of the first fixing surface 583a and the second fixing surface 583b forming the elastic surface of each reinforcing member 580 are shortened. It is possible to form the assembly easily.

In addition, the first reinforcement surface 581a and the second reinforcement surface 581b constituting the sliding surface are formed in parallel to connect between the first fixing surface 583a and the second fixing surface 583b, respectively. . Accordingly, even if a machining error of the reinforcing member 580 occurs, the first reinforcing surface 581a and the second reinforcing surface 581b are always in close contact with both sides of the circumferential direction of the first key portion 575, and thus friction with the key groove. The loss can be prevented in advance.

On the other hand, there is another embodiment of the structure for fixing the reinforcing member according to the present invention as follows.

That is, in the above-described embodiments, even when the fixing surface is excluded from the reinforcing member, the assembly direction of the reinforcing member is assembled in a radial direction, that is, the connection surface is in close contact with the outer circumferential side of the first key portion. The assembling direction of the axial direction, that is, the connecting surface is to be formed in close contact with the axial side of the first key portion. FIG. 11A is an exploded perspective view showing another embodiment of the fixing structure of the reinforcing member according to the present embodiment, and FIG. 11B is a cross-sectional view showing the reinforcing member coupled to the key portion of the old dam ring in FIG. 11A.

As shown therein, the reinforcing member 680 according to the present embodiment includes a first reinforcing surface 681a, a second reinforcing surface 681b, and a first reinforcing surface 681a and a second reinforcing surface 681b. It may be made of a connecting surface 682 for connecting.

The first reinforcement surface 681a and the second reinforcement surface 681b are tightly fixed to both sliding surfaces 675c and 675c of the first key portion 675, and the connecting surface 682 is the first key portion 675. It can be fixed in close contact with the axial side 675d of the.

Furthermore, even in this case, the first reinforcement surface 681a and the second reinforcement surface 681b which are bent and extended at both ends of the connection surface 682 may be formed to be narrower toward the opposite side of the connection surface 682. . Then, the reinforcing member 680 may be firmly fixed by the elastic force in the state of being inserted into the first key portion 675.

In addition, although not shown in the drawings, in this case, the protrusions forming the separation preventing portions (685a) and 685b are formed on the first reinforcement surface 681a and the second reinforcement surface 681b of the reinforcement member 680, respectively. On both sides of the circumferential direction of the first key portion 675 facing each of the reinforcing surfaces 681a and 681b, separation preventing grooves 675c1 and 675c1 may be formed.

As a result, the effects are similar to those of the above-described embodiment, and thus description thereof will be omitted. However, this embodiment may be easier to assemble as the insertion length is shorter than the above embodiment. In addition, as the connecting surface 682 of the reinforcing member 680 according to the present embodiment surrounds the axial side surface of the first key portion 675, it may be caused by an assembly error or may cause unstable behavior of the second scroll during operation. It is possible to suppress wear to the axial side of the key portion that may be generated.

Meanwhile, in the present embodiment, the old dam ring is provided between the frame and the turning scroll so as to slide to the frame and the second scroll, respectively. However, the old dam ring is provided on the fixed scroll between the fixed scroll and the turning scroll. It may be coupled to each of the key groove and the key groove provided in the turning scroll. Even in this case, the reinforcement member described above may be coupled to the first key portion and the second key portion of the Oldham ring, respectively.

In addition, although the foregoing embodiments have described the electric scroll compressor in which the casing is installed in the lateral direction, the same may be applied to the general scroll in which the casing is installed in the longitudinal direction.

In addition, in the above-described embodiments, the low pressure scroll compressor in which the inner space of the casing constitutes the suction space has been described, but the same may be applied to the high pressure type crawler compressor in which the inner space of the casing constitutes the discharge space.

Claims (15)

First scroll;
A second scroll engaged with the first scroll to form a compression chamber with the first scroll while pivoting;
An old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll; And
And a reinforcing member coupled to the key part of the old dam ring and provided between the key groove of the second scroll and the key part of the old dam ring.
The reinforcing member is provided with a departure prevention portion bent or protruded in the direction toward the key portion to be inserted and fixed to the key portion,
The key portion is a scroll compressor, characterized in that the separation prevention groove is formed to be inserted and fixed to the separation prevention portion. delete delete First scroll;
A second scroll engaged with the first scroll to form a compression chamber with the first scroll while pivoting;
An old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll; And
And a reinforcing member coupled to the key part of the old dam ring and provided between the key groove of the second scroll and the key part of the old dam ring.
The reinforcing member,
A plurality of reinforcing surfaces facing both circumferential sides of the key portion;
A connection surface facing the outer circumferential side of the key part by connecting each end of the plurality of reinforcement surfaces to each other; And
And a plurality of fixing surfaces that are bent toward the reinforcing surfaces facing each other at each other end of the plurality of reinforcing surfaces to face the inner circumferential side of the key portion. The method of claim 4, wherein
On the inner circumferential side of the key portion is formed a departure prevention groove having a predetermined depth in the radial direction,
Scroll fixing, characterized in that the both sides of the fixing member of the reinforcing member is formed a separation prevention portion bent toward the separation prevention groove. The method of claim 4, wherein
The inner circumferential side of the key portion is formed with a separation prevention groove having a predetermined depth in the radial direction, the separation prevention groove is formed by opening one end in the axial direction,
Scroll fixing, characterized in that the both sides of the fixing member of the reinforcing member is formed a separation prevention portion bent toward the separation prevention groove. The method of claim 4, wherein
The inner circumferential side of the key portion is formed with a separation prevention groove having a predetermined depth in the radial direction, the separation prevention groove is formed with a locking surface in the shape blocked in the axial direction,
Both fixing surfaces of the reinforcing member is inserted into the separation preventing groove is supported in the axial direction by the locking surface. The method of claim 4, wherein
On both sides of the circumferential direction of the key portion is formed a separation prevention groove having a predetermined depth,
Scroll reinforcement, characterized in that the separation prevention portion is formed in a projection shape so as to be inserted into the separation prevention groove on both reinforcement surfaces of the reinforcement member. delete First scroll;
A second scroll engaged with the first scroll to form a compression chamber with the first scroll while pivoting;
An old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll; And
And a reinforcing member coupled to the key part of the old dam ring and provided between the key groove of the second scroll and the key part of the old dam ring.
On the outer circumferential side and the inner circumferential side of the key portion, a separation prevention groove having a predetermined depth in the opposite radial direction is formed, respectively,
The reinforcing member is composed of a first reinforcing member provided to face the circumferential side of the key portion and a second reinforcing member provided to face the other circumferential side of the key portion,
The first reinforcing member and the second reinforcing member, respectively, a reinforcing surface facing both sides of the circumferential direction of the key portion, a plurality of fixing surfaces each bent at both ends of the reinforcing surface, the both sides preventing from the plurality of fixing surfaces A scroll compressor, comprising a plurality of separation prevention portions each bent toward the groove. First scroll;
A second scroll engaged with the first scroll to form a compression chamber with the first scroll while pivoting;
An old dam ring having an annular ring portion and a key portion protruding from the ring portion, wherein the key portion is slidably coupled to a key groove provided in the second scroll to pivot the second scroll with respect to the first scroll; And
And a reinforcing member coupled to the key part of the old dam ring and provided between the key groove of the second scroll and the key part of the old dam ring.
The reinforcing member,
A connection surface facing one side of the key in the axial direction; And
And a plurality of fixing surfaces that are bent at both ends of the connection surface to face both sides of the circumferential direction of the key portion. The method according to any one of claims 1, 4 to 8, 10 and 11,
And the reinforcing member is formed by bending a plate having rigidity to be in contact with at least three or more surfaces of the side surfaces of the key part. The method of claim 12,
The key part of the old dam ring is formed of the same material as the second scroll,
The reinforcement member is a scroll compressor, characterized in that the key groove of the second scroll or the key portion of the old dam ring and a different material. The method of claim 13,
The old dam ring is a scroll compressor, characterized in that the key portion and the ring portion is formed of the same material. The method of claim 14,
The old dam ring is a scroll compressor, characterized in that the ring portion and the key portion is formed in a single body.

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