KR101567087B1 - compressor - Google Patents

Abstract

The present invention relates to a compressor that compresses a refrigerant while rotating in a state in which a rotating member is suspended from a stationary member. More particularly, the present invention relates to a compressor that is installed to suspend a rotating member from a first stationary member, So that it is not only structurally stabilized but also can be easily assembled by aligning the centers of the components, and the mounting structure of the vanes can be improved to improve the lubrication performance as well as to improve the operation reliability.

A compressor, a fixed member, a rotary member, a fixed shaft, an eccentric portion, a cylinder, a rotor, a vane, a vane spring,

Description

COMPRESSOR

The present invention relates to a compressor which compresses a refrigerant while rotating in a state where the rotary member is suspended on a bearing while being suspended on a fixed member. In particular, not only the structural stability but also the assemblability can be improved and the lubrication performance and operation reliability The present invention relates to a compressor capable of increasing the temperature of the compressor.

2. Description of the Related Art Generally, a compressor is a mechanical device that receives power from an electric motor or a power generating device such as a turbine and compresses air, refrigerant or various other operating gases to increase its pressure. Or widely used throughout the industry.

Such a compressor is broadly classified into a reciprocating compressor that compresses the refrigerant while linearly reciprocating the piston inside the cylinder so as to form a compression space in which a working gas is sucked and discharged between the piston and the cylinder. A rotary compressor for compressing the working gas in a compression space formed between a roller and a cylinder to be eccentrically rotated and a rotary compressor for compressing the working gas in a compression space formed between a roller and a cylinder, And a scroll compressor that compresses the refrigerant while rotating the orbiting scroll along the fixed scroll so that a compression space in which the working gas is sucked and discharged is formed in the scroll compressor.

Reciprocating compressors have excellent mechanical efficiency, but these reciprocating movements cause severe vibration and noise problems. Because of this problem, rotary compressors have been developed due to their compactness and excellent vibration characteristics.

The rotary compressor is configured such that a motor portion and a compression mechanism portion are mounted on a drive shaft in a hermetically sealed container. The roller located around the eccentric portion of the drive shaft is located in a cylinder forming a cylindrical compression space, And extends between the compression spaces to divide the compression space into a suction region and a compression region, and the roller is positioned eccentrically in the compression space. Generally, the vane is configured to be supported by a spring on the recessed portion of the cylinder so as to press the surface of the roller, and by this vane, the compression space is divided into the suction region and the compression region as described above. The suction region gradually increases in accordance with the rotation of the drive shaft, so that the refrigerant or the working fluid is sucked into the suction region and the compressed region is gradually reduced, thereby compressing the refrigerant or the working fluid therein.

In such a conventional rotary compressor, since the motor portion and the compression mechanism portion are stacked vertically, there is a problem that the height of the compressor inevitably increases as a whole. In addition, in the conventional rotary compressor, since the weight of the motor portion and the compression mechanism portion are different from each other, a difference in inertial force is generated, and inevitably unbalance occurs on the upper and lower sides around the drive shaft. Therefore, in order to compensate for the unbalance between the motor unit and the compression mechanism unit, a weight member can be added to the weight member having a relatively small weight. However, this results in an additional load applied to the rotating member, . In addition, in the conventional rotary compressor, since the eccentric portion is formed in the drive shaft in the compression mechanism, the eccentric portion is rotated together with the rotation of the drive shaft to drive the roller outside the eccentric portion. As a result, in the eccentric rotation of the drive shaft and eccentric portion There is a problem that the vibration due to the vibration is inevitably generated. Further, in the conventional rotary compressor, the eccentric portion of the drive shaft rotates continuously and slidingly contacts the inner surface of a stationary cylinder to which the roller is fixed, and also continuously slides on the end surface of the vane, Since there is a high relative speed between the sliding contact elements, friction loss is generated. This leads to a reduction in the efficiency of the compressor. Furthermore, there is a possibility that the refrigerant leaks from the contact surface between the sliding contact vane and the roller So that the mechanical reliability is lowered.

The conventional rotary compressor has a configuration in which a drive shaft rotates inside a fixed cylinder, while in Japanese Unexamined Patent Publication Nos. 62-284985 and 64-100291, a shaft having an intake port in the axial direction and a shaft larger than the shaft A fixed shaft integrally formed with a piston eccentric in diameter and having a port communicating with a suction port of the shaft in a radial direction; A vane that is installed so as to be able to be run; A rotor rotatable about said vane; An upper bearing having a discharge port; Lower bearing; A permanent magnet having a hollow cylindrical shape having a height greater than a difference between an outer diameter and an inner diameter, the permanent magnet being fixed to the lower bearing; And a coil that is not rotated on the outer periphery of the permanent magnet. By configuring the upper and lower rotors so as to be rotatable by sequentially connecting the rotor and the lower bearing, the space between the rotor, the upper bearing and the lower bearing, And a rotary compressor.

In the rotary compressor disclosed in Japanese Unexamined Patent Publication (KOKAI), since the hollow cylindrical permanent magnet is located inside the stator, and the rotor and the compression mechanism section including the vane are located inside the permanent magnet, the motor section and the compression mechanism section It is possible to solve the problem that occurs.

However, since the rotary compressor disclosed in the above Japanese Patent Laid-open Publication No. Hei 10-24185 is resiliently supported by the rotor in which the vane rotates, and is in sliding contact with the outer surface of the eccentric portion (piston portion) There is still a problem that there is a possibility of refrigerant leakage at the contact surface between the vane and the eccentric portion which is in sliding contact as well as friction loss due to the existence of a high relative speed difference as in the rotary compressor. In addition, the rotary compressor disclosed in the above Japanese Laid-Open Patent Publications does not disclose any realizable structure for the suction and discharge flow of the operating fluid, the lubrication oil supply in the compression mechanism portion, and the mounting of the bearing member. It is not reaching to the extent possible.

Alternatively, U.S. Patent Publication No. 7,217,110 discloses a rotary compressor in which a fixed shaft and an eccentric portion are integrally formed, and a compression space is formed between an outer surface of a roller rotatably positioned in an eccentric portion and an inner surface of a rotating rotor . Here, the rotational force of the rotor is transmitted to the roller through a vane fixed to the upper and lower plates of the rotor rotating integrally with the rotor. By using the pressure inside the sealed container and the pressure difference inside the compression space, And the working fluid and the lubricating oil are introduced into the compression space through the formed longitudinal flow passage.

Therefore, the rotary compressor disclosed in the above-mentioned U.S. Patent Application Publication No. 2000-227558 also can solve the problems due to the fact that the motor unit and the compression mechanism unit are installed in the height direction in the conventional rotary compressor because the compression mechanism is formed inside the rotor. Further, unlike the Japanese Laid-Open Patent Publications, there is no difference in relative speed between the rotors, the vanes and the rollers because they rotate integrally, and there is no fear of frictional loss caused thereby.

However, since the one end of the fixed shaft is fixed to the hermetically sealed container, the other end of the fixed shaft is formed to be suspended from the hermetically sealed container while being separated from the hermetically sealed container, so that the center of the fixed shaft is assembled And is very vulnerable to lateral vibration due to inevitable eccentric rotation due to the nature of the rotary compressor. Thus, there is a problem in that it is difficult to actually manufacture the compressor and the assembling productivity is poor. In addition, since the vane is formed inwardly from the rotor and the vane groove is formed in the roller so as to guide the movement locus of the vane, the volume of the roller inevitably becomes large for forming the vane groove and a roller of a relatively large volume There is a problem that oscillation in the lateral direction is excited by eccentric rotation. However, in the case of a structure using lubricating oil, it is necessary to use lubricating oil in the inside of the sealed container and the pressure difference in the compression space, In this case, not only a lot of lubricating oil is inevitably incorporated in the working fluid but also the lubricating performance is deteriorated because the compressor can be escaped with the working fluid, because the lubricating oil is drawn into the compression space and circulated together with the working fluid.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compressor which can easily assemble components to a hermetically sealed container and improve structural safety.

It is another object of the present invention to provide a compressor that not only reduces lateral vibration due to eccentric rotation but also facilitates actual production and assembly.

Another object of the present invention is to provide a compressor capable of lowering the height even when the rotor and the cylinder are stacked.

It is also an object of the present invention to provide a compressor which can be easily lubricated by improving the mounting structure of the vane.

According to an aspect of the present invention, there is provided a compressor including: a sealed container in which a refrigerant is sucked or discharged; A stator fixed on the inner surface of the sealed container; A stationary member including a stationary shaft provided so as not to move in the hermetically sealed container and an eccentric portion formed to be eccentric to the stationary shaft; A rotor provided between the stator and the fixed member so as to rotate around the fixed member by mutual electromagnetic force with the stator; a cylinder stacked on the rotor and rotated together with the rotor and having a compression space therein; And a rotary member elastically supported on the cylinder so as to divide the compression space between the suction pocket into which the refrigerant is sucked and the compression pocket into which the refrigerant is compressed and discharged and to rotate together with the cylinder to make sliding contact with the outer surface of the eccentric portion .

Further, in the present invention, furthermore, an upper and a lower bearing cover for forming upper and lower portions of the compression space and rotating the fixing member centrally together with the rotary member, wherein the upper bearing cover connects between the rotor and the cylinder do.

Further, in the present invention, the upper bearing cover is composed of a cylinder engaging portion in which the cylinder is fastened to the inner peripheral bottom surface, and a rotor engaging portion in which the rotor is fastened to the upper surface of the outer peripheral surface of the cylinder engaging portion.

In addition, in the present invention, the cylinder coupling portion is formed so as to be stepped so that the upper surface thereof protrudes more than the rotor coupling portion so that the inner circumferential surface of the rotor can be fitted.

Further, in the present invention, it is preferable to further include a lower bearing which is formed so as to be spaced apart from a lower end of the fixing member and is fixed to a lower portion of the closed container, wherein the rotary member is rotatably supported while applying a load to the lower bearing, So that it is supported as much as possible.

Further, in the present invention, the cylinder is provided with a slot-shaped vane mounting hole extending in the radial direction and the vertical direction on the inner peripheral surface, and the vane is supported by the vane spring in a state of being inserted into the vane mounting hole .

Further, in the present invention, the cylinder is provided with a vane evacuation protrusion protruding from the cylinder outer circumferential surface, and the vane evacuation protrusion includes an opening communicating with the vane mount.

Further, in the present invention, the opening is blocked by a vane spring stopper.

Further, in the present invention, the vane spring stopper further includes a hole communicating with the oil filled in the hermetically sealed container at the center portion.

In addition, in the present invention, the fixing member may include a first fixing member including a fixing shaft having an upper end and an eccentric portion eccentric to the fixing shaft so as not to move in the hermetically sealed container, And a second fixing member installed on the lower portion of the container so as not to move. The rotary member rotates around the first fixing member and can compress and suck the refrigerant into the compression space formed in the rotary member, And is rotatably supported.

In addition, in the present invention, the rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and rotate about the fixed member by connecting the rotor and the cylinder, and the upper bearing cover surrounds the fixed shaft And an upper cover portion coupled to the cylinder to form an upper portion of the compression space, wherein an inner surface of the upper shaft portion is rotatably journalled on an outer surface of the fixed shaft, and a bottom surface of the upper cover portion rotatably supports the upper surface of the eccentric portion .

Further, in the present invention, the rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and which rotate between the rotor and the cylinder and rotate about the fixed member, and the lower bearing cover surrounds the fixed shaft And a lower cover portion coupled to the cylinder to form a lower portion of the compression space, wherein an inner surface of the lower shaft portion is rotatably journalled on an outer surface of the fixed shaft, and an upper surface of the lower cover portion is rotatably supported on a bottom surface of the eccentric portion .

Further, in the present invention, the rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and which connect the rotor and the cylinder and rotate around the fixing member, and the lower bearing cover The lower shaft portion formed to be wrapped is formed so as to extend beyond the lower end of the fixed shaft and the end portion of the lower shaft portion is rotatably supported while applying a load of the rotary member to the second fixing member.

Further, in the present invention, the second fixing member further includes a cylindrical bearing portion having a stepped portion inside, a lower end portion of the lower shaft portion is supported by a step difference of the second fixing member, and an outer surface of the lower shaft portion is journal- .

Further, in the present invention, a separate thrust bearing member is provided between the lower end of the lower shaft portion and the step of the second fixing member.

The compressor according to the present invention configured as described above is assembled so that the rotary member is suspended from the fixing member, then the fixing member is fixed to the upper bearing and the rotary member is rotatably supported on the lower bearing, and the upper and lower bearings are sealed Since the components are fixed to the container, the components can be easily assembled to the closed container so as to be assembled, thereby improving the structural safety and assemblability.

In the compressor according to the present invention, even when the eccentric portion is eccentric from the axial center of the fixed shaft, the compressor and the compressor rotate about the fixed shaft while the cylinder and the rotor rotate about the eccentric portion The eccentric rotation is not generated because the cylinder, the rotor and the vane rotate around the respective axes. As a result, not only the lateral vibration due to the eccentric rotation is reduced but also the balance weight used to reduce the vibration due to the eccentric rotation It is possible to omit it, and the efficiency can be increased.

In the compressor according to the present invention, the rotor and the cylinder are connected by the upper bearing cover so as to be laminated so that the portion where the rotor is engaged is thinner than the portion where the cylinder is coupled. The height can be reduced.

In the compressor according to the present invention, a vane spring and a vane spring are assembled to a vane mounting hole passing through the inner and outer peripheral surfaces of the cylinder, and then the vane spring supporter is fixed to the outer circumferential surface of the cylinder so as to block the vane mounting hole. There is an advantage that the lubrication performance of the vane can be improved and the operation reliability of the vane can be improved by improving the mounting structure of the vane.

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

1 to 3 are a side sectional perspective view and an exploded perspective view and a side sectional view of the compressor according to the present invention.

1 to 3, the compressor according to the present invention includes a hermetically sealed container 110, a stator 120 fixed in the hermetically sealed container 110, and a rotating electromagnetic field from the stator 120, The rotary shaft 130 is installed so as to hang on the outer circumferential surface of the rotary shaft 130. The upper and lower ends of the rotary shaft 141 are fixed to the hermetically sealed container 110 An upper bearing 150 for fixing the upper end of the fixing shaft 141 to the inside of the hermetically sealed container 110 and an upper bearing 150 for separating the lower end of the fixing shaft 141 from the lower end of the fixing shaft 141, And a lower bearing 160 fixed to the inside of the hermetically sealed container 110 so as to be rotatably supported on the hermetically sealed container 110. Here, the transmission mechanism for providing the power through the electric action includes the rotor 131 of the rotary member 130 including the stator 120, and the compression mechanism for compressing the refrigerant through the mechanical action includes the rotary member 130 (Not shown). Therefore, the overall height of the compressor can be reduced by partially stacking the transmission mechanism portion and the compression mechanism portion in the vertical direction and installing the transmission mechanism in the radial direction.

The hermetically sealed container 110 includes a cylindrical body 111, upper and lower shells 112 and 113 coupled to the upper and lower portions of the body 111, And a mounting portion 114 provided radially on the bottom surface of the mounting portion 113. Oil for lubricating the rotary member 130 and the fixing member 140 can be stored in the interior of the mounting portion 114 to an appropriate height. The center of the upper shell 112 is provided so that the fixing shaft 141 is directly exposed as an example of a suction pipe (not shown) in which the refrigerant is sucked, and a discharge tube 115, and the high pressure type or low pressure type is determined depending on whether the inside of the closed container 110 is filled with the compressed refrigerant or the refrigerant before being compressed, so that the suction pipe and the discharge pipe may be changed. In the embodiment of the present invention, the fixed shaft 141, which is a high-pressure type suction pipe, protrudes outside the hermetically sealed container 110. However, it is not necessary that the fixed shaft 141 is excessively protruded to the outside of the hermetic container 110, and it is preferable that an appropriate fixing structure is provided outside the hermetic container 110 so as to be connected to the external refrigerant pipe. In addition, the upper shell 112 is provided with a terminal 116 for supplying power to the stator 120.

The stator 120 is composed of a core and a coil that is concentratedly wound around the core, and is fixed to the inside of the body 111 of the closed container 110 by heat shrinkage. The core employed in the conventional BLDC motor has nine slots along the circumference whereas in the preferred embodiment of the present invention the diameter of the stator 120 is relatively large such that the core of the BLDC motor has twelve slots along the circumference . As the number of slots of the core increases, the number of windings of the coil increases. Therefore, in order to generate the electromagnetic force of the conventional stator 120, the height of the core may be reduced.

The rotating member 130 includes a rotor 131, a cylinder 132, a vane 133, a vane spring 134, an upper bearing cover 135, and a lower bearing cover 138. The rotor 131 is provided with a plurality of permanent magnets in the axial direction so as to rotate by the rotating electromagnetic field from the stator 120 and is provided so as to maintain a gap inside the stator 120. The cylinder 132 is formed in a cylindrical shape having a compression space therein. The cylinder 132 is provided with a vane mount 132H which is formed to be long in the radial direction so that the vane 133 and the vane spring 134 can be mounted on the inner circumferential surface. The rotor 131 and the cylinder 132 are coupled to each other such that the rotor 131 and the cylinder 132 are stacked on the upper bearing cover 135 so that the rotor 131 and the cylinder 132 integrally rotate. The vane 133 is installed such that one end thereof is supported on the outer circumferential surface of the eccentric portion 142 and the other end is elastically supported by the vane spring 134 on the vane mount 132H of the cylinder 132, (S in Fig. 4) in which the refrigerant is sucked and a compression pocket (D in Fig. 4) in which the refrigerant is compressed and discharged. The compression pocket between the compression chamber 132 and the eccentric portion 142 is divided into a suction pocket Of course, it is preferable that a lubricating structure is applied so that the vane 133 smoothly moves in the eccentric portion 142 and the vane mount 132H of the cylinder 132. [

The upper bearing cover 135 is provided so as to be in contact with the journal bearing or the thrust bearing at a portion abutting the fixing member 140 and is engaged to be coupled to stack the rotor 131 and the cylinder 132 in the vertical direction. At this time, the outer circumferential portion of the upper surface of the upper bearing cover 135 is formed so as to be stepped so that the rotor 131 can be fastened. When the rotor 131 is placed on the stepped portion on the outer circumference of the upper surface of the upper bearing cover 135 And the cylinder 132 is bolted to the center of the bottom surface of the upper bearing cover 135. The upper bearing cover 135 is provided with a discharge port (not shown) through which refrigerant compressed in the compression space can be discharged and a discharge valve 135A installed therein. In order to reduce the dead volume, the discharge port of the upper bearing cover 135 It is preferable to be located adjacent to the vane 133. [ The upper bearing cover 135 is coupled to the bottom surface of the rotor 131 and the upper surface of the cylinder 132. The lower bearing cover 135 is coupled to the bottom surface of the cylinder 131, Respectively.

The fixing member 140 includes a fixed shaft 141 provided in a cylindrical shape and a fixed shaft 141 in a radial direction of the fixed shaft 141 so as to have a cylindrical shape with a larger diameter than the cylindrical shape of the fixed shaft 141 And an eccentric portion 142 eccentrically formed on the fixed shaft 141. An oil supply passage 141A through which the oil stored in the hermetically sealed container 110 is supplied is formed in the lower portion of the fixed shaft 141. A vertical suction And the oil supply passage 141A and the vertical suction passage 141B are formed so as to be isolated from each other so that the oil can be prevented from escaping together with the refrigerant. The eccentric part 142 is formed to extend in all the radial directions of the fixed shaft 141 and extends in the radial direction of the eccentric part 142 so as to communicate with the vertical suction passage 141B of the fixed shaft 141 A horizontal suction passage 142B is provided and the vane 133 can pass along the horizontal suction passage 142B. At this time, since the upper and lower surfaces of the eccentric portion 142 abut against the upper and lower bearing covers 135 and 136 to act as a thrust surface, it is preferable that a supply passage for lubricant is formed on the upper and lower surfaces of the eccentric portion 142 And the outer circumferential surface of the eccentric portion 142 abuts against the vane 133, it is preferable that a lubricant supply passage extending to the outer circumferential surface is formed on the inner side of the eccentric portion 142.

The upper and lower bearings 150 and 160 fix the fixing shaft 141 to the hermetically sealed container 110 so as not to move, and rotatably support the rotary member 130. The upper bearing 150 is fixed to the upper shell 112 of the sealed container 110 by welding or the like after the upper portion of the fixed shaft 141 is fitted. At this time, the upper bearing 150 is formed to be smaller in the radial direction than the lower bearing 160 in order to prevent interference with the suction pipe 115 or the terminal 116 provided in the upper shell 112. Meanwhile, the lower bearing 160 is separated from the lower portion of the fixed shaft 141, the shaft portion of the lower bearing cover 136, which surrounds the lower portion of the fixed shaft 141, is rotatably supported by the thrust bearing 161, And is fixed to the side of the body 111 of the closed container 110 by heat shrinking or three-point welding. The vane 133, the upper and lower bearing covers 135 and 136, the fixed shaft 141 and the eccentric portion 142 are all cast by cast iron, and then the upper and lower bearings 150 and 160 are formed by press working. Grinding and further machining.

The upper and lower bearing covers 135 and 136 are rotatably installed on the fixing member 130 and the lower bearing 160. The upper and lower bearing covers 135 and 136 are rotatably mounted on the fixing member 140. [ More specifically, the upper bearing cover 135 includes an upper shaft portion 135a surrounding the upper portion of the fixed shaft 141 and upper cover portions 135b and 135c contacting the upper surface of the eccentric portion 142. The upper cover portion 135 135b and 135c are formed to have a relatively thick thickness to withstand the pressure of the compression space and have a cylinder mounting portion 135b to which the cylinder 132 is bolted to the bottom surface and a cylindrical mounting portion 135b having a relatively thin thickness so as to be stepped on the outer circumferential surface of the cylinder mounting portion 135b And a rotor mounting portion 135c which is bolted with the rotor 131 mounted on the upper surface thereof. A journal bearing for journaling the outer circumferential surface of the fixing shaft 142 is provided at the inner circumferential surface of the upper shaft portion 135a and a journal bearing is provided at the bottom surface of the upper cover portion 135b or 135c or the cylinder engaging portion 135b. ) Thrust bearing for supporting the upper surface thereof. The lower bearing cover 136 includes a lower shaft portion 136a surrounding the lower portion of the fixed shaft 141 and a lower cover portion 136b contacting the bottom surface of the eccentric portion 142. [ At this time, a journal bearing for supporting the outer circumferential surface of the lower portion of the lower shaft portion 136a is provided on the inner circumferential surface of the lower shaft portion 136a, and a thrust bearing for supporting the lower surface of the eccentric portion 142 is provided on the upper surface of the lower cover portion 136b . The lower bearing 160 includes a stepped cylindrical bearing portion 160a surrounding the lower shaft portion 136b and a mounting portion 160b which is extended in the radial direction of the bearing portion 160a to be welded and fixed to the inside of the sealed container 110 ). A journal bearing for supporting the outer circumferential surface of the lower shaft portion 136a is provided on the inner circumferential surface of the bearing portion 160a and a thrust bearing for supporting the lower end of the lower shaft portion 136a is provided on the stepped bottom surface of the bearing portion 160a. Or a separate plate-shaped thrust bearing 161 may be interposed therebetween.

Therefore, when the upper and lower bearing covers 135 and 136 are coupled to the rotor 131 and the cylinder 132 and the fixing member 140 in the axial direction, the bottom surface of the cylinder coupling portion 135b of the upper bearing cover 135, And the upper surface of the rotor coupling portion 135c of the upper bearing cover 135 is bolted so as to abut the upper surface of the rotor 132 and the upper surface of the rotor coupling portion 135c of the upper bearing cover 135 is engaged with the cover portion 136b are bolted together so as to abut the bottom surface of the cylinder 132. At this time, since the upper shaft portion 135a is supported by the journal bearing on the upper portion of the fixed shaft 141 and the upper cover portions 135b and 135c are supported by the upper surface of the eccentric portion 142, The lower shaft portion 136a is journaled on the lower portion of the fixed shaft 141 and the lower cover portion 136b is supported on the bottom of the eccentric portion 142, (136) is rotatably mounted on the fixing member (140). The lower bearing cover 136a of the lower bearing cover 136 is fitted to the bearing portion 160a of the lower bearing 160. Since the lower bearing cover 136 is supported by the journal surface or the thrust surface that abuts against each other, And is rotatably supported with respect to the lower bearing 160.

4 and 5 are a sectional view and a side sectional view showing a vane mounting structure of a compressor according to the present invention.

4 and 5, a vane evacuation protrusion 132A protruding from one side of the outer circumferential surface of the cylinder 132 is provided and the vane evacuation protrusion 132A is provided with a protrusion A vane mounting hole 132H penetrating radially in the outer circumferential surface of the cylinder 132 and penetrating in the axial direction is provided and the vane spring 134 is mounted on the outer circumferential surface of the cylinder 132 so as to support the vane spring 134, A spring supporter 137 is provided. One end of the vane 133 is resiliently supported by the vane spring 134 to the vane mount 132H and the other end of the vane 133 is supported on the outer circumferential surface of the eccentric portion 142. [

On the other hand, the upper and lower bearing covers 135 and 136 are bolted together in the axial direction of the cylinder 132, and the vane 133 abuts the upper and lower bearing covers 135 and 136. The upper bearing cover 135 includes the upper shaft portion 135a, the cylinder mounting portion 135b and the rotor mounting portion 135c and the upper surface of the vane 133 abuts the lower surface of the cylinder mounting portion 135b . Of course, the lower bearing cover 136 is composed of the lower shaft portion 136a and the lower cover portion 136b, and the bottom surface of the vane 133 abuts the upper surface of the lower cover portion 136b. Therefore, since the vane 133 is in contact with the vane mount 132H of the cylinder 132 on both sides and the upper and lower bearing covers 135 and 136 are in contact with the upper and lower surfaces, a lubricating structure is applied for smooth operation of the vane 133 . In the embodiment of the present invention, the vane spring supporter 137 is provided with a hole 137h through which oil can be supplied, and the oil surface of the oil stored in the sealed container 110 (shown in Fig. 1) The vane 133 which reciprocates linearly inward as the oil is automatically introduced into the vane mount 132H through the hole 137h of the vane spring supporter 137, The operation reliability can be improved.

The vane 133 thus mounted divides the compression space provided between the cylinder 132 and the eccentric portion 142 into a suction pocket S and a compression pocket D. [ The horizontal suction passage 142B of the eccentric portion 142 described above is positioned so as to communicate with the suction pocket S and the discharge port of the upper bearing cover 135 and the discharge valve 135A are positioned to communicate with the compression pocket D As described above, it is preferable to be located close to the vane 133 in order to reduce the corporeal mass.

Therefore, when the rotor 131 is rotated by the rotor system with the stator 120 (shown in Fig. 1), the cylinder 132 connected by the rotor 131 and the upper bearing cover 135 also rotates integrally. The vane 133 is elastically supported on the vane mount 132H of the cylinder 132 and is supported on the outer circumferential surface of the eccentric portion 142. The cylinder 132 rotates around the fixed shaft 141, 133 rotate about the eccentric portion 142 in sliding contact with the outer circumferential surface of the eccentric portion 142. That is, the inner circumferential surface of the cylinder 132 has a portion corresponding to the outer circumferential surface of the eccentric portion 142, and the portions corresponding to each other contact each time the cylinder 132 makes one revolution, As the pocket S gradually increases, the refrigerant or the working fluid is sucked into the suction pocket S, and at the same time, the compression pocket D is gradually reduced, and the refrigerant or the working fluid therein is compressed and then discharged.

6 is a plan view showing the operation cycle of the compression mechanism of the compressor according to the present invention.

As shown in FIG. 6, the cylinder 132 and the vane 133 are rotated to move relative to each other (a), (b), (c), and (d) Is shown in Fig. More specifically, when the cylinder 132 and the vane 133 are located at (a), the refrigerant or the working fluid is sucked into the suction pocket S, and the suction pocket S and the vane 133 are partitioned by the suction pocket S and the vane 133 Compression occurs in the compressed pocket (D). The suction pocket S is extended and the compression pocket D is reduced while the cylinder 132 and the vane 133 are rotated and the refrigerant or the working fluid is sucked into the suction pocket S, Compression continues in the compression pocket (D). When the cylinder 132 and the vane 133 reach the position (c) while rotating, they are continuously sucked into the suction pocket S, and when the pressure of the refrigerant or the working fluid in the compressed pocket D becomes equal to or higher than the set pressure, Or the working fluid is discharged through the discharge port of the upper bearing cover 135 (shown in Fig. 2) and the discharge valve 135A (shown in Fig. 2). (d), the suction and discharge of the refrigerant and the working fluid are almost completed. Of course, when the position is changed from (d) to (a), the vane 133 passes through the horizontal suction passage 142B provided in the eccentric portion 142.

In the foregoing, the present invention has been described in detail by way of examples on the basis of the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

1 is a side sectional perspective view showing an example of a compressor according to the present invention.

FIG. 2 is an exploded perspective view showing an example of a compressor according to the present invention. FIG.

3 is a side sectional view showing an example of a compressor according to the present invention.

FIGS. 4 and 5 are a plan view and a side sectional view showing a vane mounting structure of a compressor according to the present invention;

6 is a plan view showing the operation cycle of the compression mechanism in the compressor according to the present invention.

Claims (15)

A sealed container in which a refrigerant is sucked or discharged; A stator fixed on the inner surface of the sealed container; A stationary member including a stationary shaft provided so as not to move in the hermetically sealed container and an eccentric portion formed to be eccentric to the stationary shaft; And, A rotor provided between the stator and the fixed member so as to rotate around the fixed member by mutual electromagnetic force with the stator; a cylinder stacked on the rotor and rotated together with the rotor and having a compression space therein; And a rotating member formed of a vane elastically supported on the cylinder so as to divide the space into a suction pocket in which the refrigerant is sucked and a compression pocket in which the refrigerant is compressed and discharged and which rotates together with the cylinder and slides on the outer surface of the eccentric portion, Further comprising upper and lower bearing covers that form upper and lower portions of the compression space and rotate about the fixing member together with the rotary member, The upper bearing cover connects the rotor and the cylinder, Wherein the upper bearing cover comprises a cylinder engaging portion in which a cylinder is fastened to an inner peripheral bottom surface thereof and a rotor engaging portion in which a rotor is fastened to an upper surface of the outer peripheral surface of the cylinder engaging portion. delete delete The method according to claim 1, Wherein the cylinder coupling portion is formed so as to be stepped so that the upper surface thereof protrudes more than the rotor coupling portion so that the inner circumferential surface of the rotor can be fitted. The method according to claim 1 or 4, Further comprising a lower bearing which is formed to be spaced apart from a lower end of the fixing member and fixed to a lower portion of the closed container, Wherein the rotary member is rotatably supported while bearing a load on the lower bearing, and is rotatably supported by the fixing member. A sealed container in which a refrigerant is sucked or discharged; A stator fixed on the inner surface of the sealed container; A stationary member including a stationary shaft provided so as not to move in the hermetically sealed container and an eccentric portion formed to be eccentric to the stationary shaft; And, A rotor provided between the stator and the fixed member so as to rotate around the fixed member by mutual electromagnetic force with the stator; a cylinder stacked on the rotor and rotated together with the rotor and having a compression space therein; And a rotating member formed of a vane elastically supported on the cylinder so as to divide the space into a suction pocket in which the refrigerant is sucked and a compression pocket in which the refrigerant is compressed and discharged and which rotates together with the cylinder and slides on the outer surface of the eccentric portion, Further comprising a lower bearing which is formed to be spaced apart from a lower end of the fixing member and fixed to a lower portion of the closed container, Wherein the rotary member is rotatably supported while bearing a load on the lower bearing, and is rotatably supported by the fixing member. A sealed container in which a refrigerant is sucked or discharged; A stator fixed on the inner surface of the sealed container; A stationary member including a stationary shaft provided so as not to move in the hermetically sealed container and an eccentric portion formed to be eccentric to the stationary shaft; And, A rotor provided between the stator and the fixed member so as to rotate around the fixed member by mutual electromagnetic force with the stator; a cylinder stacked on the rotor and rotated together with the rotor and having a compression space therein; And a rotating member formed of a vane elastically supported on the cylinder so as to divide the space into a suction pocket in which the refrigerant is sucked and a compression pocket in which the refrigerant is compressed and discharged and which rotates together with the cylinder and slides on the outer surface of the eccentric portion, The cylinder is provided with a slot-shaped vane mounting hole extending radially and vertically in the inner peripheral surface, The vane is supported by the vane spring in a state of being inserted into the vane mount, The cylinder is provided with a vane evacuation protrusion protruding from the cylinder outer circumferential surface, And the vane evacuation protrusion includes an opening communicating with the vane mount. 8. The method of claim 7, And the opening is closed by a vane spring stopper. 9. The method of claim 8, Wherein the vane spring stopper further includes a hole communicating with the oil filled in the hermetically sealed container in the center portion thereof. The method according to claim 1 or 4, The fixing member includes a first fixing member including a fixing shaft having an upper end and an eccentric portion eccentric to the fixing shaft so as not to move in the hermetically sealed container and a second fixing member spaced apart from a lower end of the first fixing member, And a second fixing member provided so as not to contact the first fixing member, Wherein the rotary member rotates around the first fixing member and is capable of sucking and compressing the refrigerant into the compression space formed therein and is rotatably supported while applying a load to the second fixing member. 11. The method of claim 10, The rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and which rotate about the fixing member by connecting the rotor and the cylinder, The upper bearing cover includes an upper shaft portion surrounding the fixed shaft and an upper cover portion coupled with the cylinder to form an upper portion of the compression space, Wherein an inner surface of the upper shaft portion is rotatably journal-supported on an outer surface of the fixed shaft, and a bottom surface of the upper cover portion is rotatably supported on an upper surface of the eccentric portion. 11. The method of claim 10, The rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and which rotate about the fixing member by connecting the rotor and the cylinder, The lower bearing cover includes a lower shaft portion surrounding the fixed shaft and a lower cover portion coupled with the cylinder to form a lower portion of the compression space, Wherein an inner surface of the lower shaft portion is rotatably journal-supported on an outer surface of the fixed shaft, and an upper surface of the lower cover portion is rotatably supported on the bottom surface of the eccentric portion. 11. The method of claim 10, The rotating member further includes upper and lower bearing covers which form upper and lower portions of the compression space and which rotate about the fixing member by connecting the rotor and the cylinder, Characterized in that the lower bearing portion of the lower bearing cover is formed so as to extend beyond the lower end of the fixed shaft and the end portion of the lower shaft portion is rotatably supported by applying the load of the rotary member to the second holding member. . 14. The method of claim 13, The second fixing member further includes a cylindrical bearing portion having a stepped portion therein, And the lower end of the lower shaft portion is thrust-supported by the step of the second fixing member, and the outer surface of the lower shaft portion is journal-supported on the inner surface of the cylindrical bearing portion. 15. The method of claim 14, Characterized in that a separate thrust bearing member is provided between the lower end of the lower shaft part and the step of the second fastening member.

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