KR19990020681U - Vibration Reduced Compressor Rotor - Google Patents

Abstract

The present invention relates to a vibration reduction compressor rotor, and in particular, in the upper part of the rotor in which a plurality of iron pieces are stacked between the upper end ring and the lower end ring, the iron pieces are laminated in such a manner that the long holes formed on the outer circumference are inclined to the right or left side, As the lattice is inclined in a direction corresponding to the inclination direction of the long holes stacked on the upper side, the thrust generated from the iron pieces stacked on the upper side and the thrust generated from the iron pieces stacked on the lower side may be offset. Therefore, it is possible to prevent the vibration of the rotor due to the thrust generated during rotation.

Description

A rotor of the compressor to reduce its vibration

The present invention relates to a rotor (Rotor) of the compressor, and more particularly to a vibration reduction compressor rotor that cancels the thrust generated during the rotation of the rotor coupled to the rotary shaft of the compressor to prevent the vibration of the rotor due to the thrust.

In general, a compressor is a device that raises the pressure and temperature to a saturation pressure corresponding to the condensation temperature so that the low-temperature and low-pressure refrigerant gas evaporated in the evaporator can be easily condensed and liquefied in the condenser.

Such compressors include a reciprocating compressor that compresses refrigerant gas by using a reciprocating motion of a piston, a rotary compressor that rotates a compressor in a cylinder and compresses refrigerant gas, and converts velocity energy into pressure energy by using a centrifugal force of an impeller. There is a turbo compressor for compressing.

2 is a side cross-sectional view showing a hermetic reciprocating compressor as an example of a compressor, in which a compression mechanism 120 constituting the compressor 110 and a driving motor 130 are formed of an upper case 141 and a lower case 142. The compression mechanism 120 and the driving motor 130 are coupled to each other by the frame 160 and the case 141 and 142 through four compression springs 150 or leaf springs for soundproofing and dustproofing. ) Is suspended or supported.

That is, a cylinder block 121 having a piston 122 for compressing the refrigerant gas is reciprocally installed on the upper portion of the frame 160, and the refrigerant sucked through the suction muffler on one side of the cylinder block 121. A suction and discharge valve assembly 125 for supplying gas into the cylinder block 121 and supplying the refrigerant gas compressed in the cylinder block 121 to the discharge muffler is mounted.

The suction and discharge valve assembly 125 is composed of a flapper or lead-type thin plate structure which is generally elastic for miniaturization, and is opened and closed passively according to the pressure difference generated by the reciprocating motion of the piston. The refrigerant gas is sucked into the cylinder block 121 or discharged from the cylinder block 121.

On the other hand, the drive motor 130 is composed of a stator 131 is fixed to the lower portion of the frame 160, and the rotor 132 which is a rotor that rotates with a predetermined gap with the stator 131, The rotor 132 is rotatably supported by the frame 160.

In addition, the rotary shaft 133 is coupled to the center of the rotor 132, the rotary shaft 133 is a lubricant stored in the lower portion of the case 142 for smooth operation of the compression mechanism 120 and the drive motor 130. A lubricating oil supply groove 136 for supplying a lubrication part is formed.

An eccentric shaft 134 is formed at an end of the rotating shaft 133 to protrude upward of the frame 160, and the eccentric shaft 134 is coupled to the piston 122 through the rod 135 and the bearing. Therefore, the piston 122 reciprocates by the amount of rotation of the eccentric shaft 134 to compress the refrigerant gas.

That is, when the rotation shaft 133 is rotated by the drive motor 130 mounted to the lower portion of the frame 160, the eccentric shaft 134 is rotated in conjunction with this. Therefore, the piston 122 reciprocates by the amount of eccentric rotation of the eccentric shaft 134. In other words, when the piston 122 in the cylinder block 121 reverses, the refrigerant gas of low temperature and low pressure is sucked into the cylinder block 121 from the external evaporator through the suction pipe and the suction muffler.

On the other hand, when the piston 122 is advanced, the refrigerant gas of high temperature and high pressure is discharged from the inside of the cylinder block 121 to the condenser through the discharge muffler and the discharge pipe. At this time, the suction muffler and the discharge muffler fill the refrigerant gas therein to reduce noise due to pulsation of pressure generated during suction and discharge of the refrigerant gas.

3 is an enlarged perspective view of the rotor illustrated in FIG. 2, and FIG. 4 is a perspective view illustrating the iron piece illustrated in FIG. 3.

As shown in the figure, the rotor 132 has a structure in which a plurality of iron pieces 138 are stacked between the upper end ring 135 and the lower end ring 136 made of aluminum, and the upper and lower end rings 135 and 136. In the center of the) and the iron piece 138, the coupling hole 139 is formed so that the rotation shaft 133 can be inserted and fixed.

On the other hand, a balance weight 134 is mounted on the upper end of the upper end ring 135 to prevent the rotating rotor 132 from being biased, and the lower end ring 136 is biased when pressed into the rotating shaft 133. The support piece 137 is formed at the lower end ring 136 corresponding to the portion where the balance weight 134 is mounted in order to prevent the damage.

In addition, a plurality of long holes 139a are formed at the outer circumference of the iron piece 138 stacked between the upper end ring 135 and the lower end ring 136 to reduce vibrations generated when the rotor 132 is rotated. 5, the iron pieces 138 are stacked to be inclined toward one side, that is, to the right or left side, as shown in FIG. 5.

However, in the case of laminating the long holes of the iron pieces inclined to one side as described above, the thrust force F of the rotor in which the force F _h acting in the rotational direction and the force F _v acting in the vertical direction is equal to the lower diagonal of the rotating shaft. The rotor vibrates as it acts in the direction or upward diagonal direction.

The present invention has been devised to solve the above problems, to provide a vibration reduction compressor rotor that prevents the vibration of the rotor due to the thrust by canceling the thrust generated during the rotation of the rotor coupled to the rotary shaft of the compressor The purpose.

In order to achieve the above object, the present invention, in the compressor rotor in which a plurality of iron pieces are laminated between the upper end ring and the lower end ring, the long hole formed on the outer periphery in the upper portion of the rotor inclined to the right or left to stack the iron pieces In the lower part, the iron pieces are laminated in such a manner that the long holes are inclined in a direction corresponding to the inclined direction of the long holes stacked on the upper part.

1 is a view showing a rotor according to the present invention,

Figure 2 is a side cross-sectional view showing a typical reciprocating compressor,

3 is an enlarged perspective view of the rotor shown in FIG. 2;

4 is a perspective view showing the iron piece shown in FIG.

5 is a view showing a state in which the iron pieces of FIG. 4 are stacked.

Explanation of symbols for main parts of the drawings

10: rotor 11: upper end ring

12: balance weight 13: lower end ring

14: support 20: rotating shaft

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

1 is a view showing a rotor according to the present invention, a plurality of iron pieces are stacked between the upper end ring 11 and the lower end ring 13, a plurality of long holes along the outer periphery as described above Is formed, and the coupling hole into which the rotating shaft 20 is inserted and fixed is formed in the center.

On the other hand, the balance weight 12 is mounted on the upper end of the upper end ring 11 to prevent the bias of the rotor 10 during rotation, and the lower end ring 13 is biased when press-fitted to the rotating shaft 20 In order to prevent that, the support piece 14 is formed in the lower end ring 13 corresponding to the portion where the balance weight 12 is mounted.

In the upper portion of the rotor 10, the long holes formed on the outer periphery of the rotor 10 are inclined to the right or left side, and the lower pieces are stacked to the long holes inclined in the direction corresponding to the inclination direction of the long holes stacked on the upper side.

Therefore, the thrust F ₁ combined with the force F _h1 acting in the direction of rotation generated from the iron pieces stacked on the upper part and the force F _v1 acting in the vertical direction when the rotor rotates is generated from the iron pieces stacked on the lower part. Since the thrust F ₂ combined with the force F _h2 acting in the rotational direction and the force F _v acting in the vertical direction cancel each other, the rotor 10 does not vibrate during rotation.

As described above, according to the present invention, as the long holes of the iron pieces stacked on the upper part and the long holes of the iron pieces stacked on the lower part are inclined in a direction corresponding to each other, the thrust generated from the iron pieces stacked on the upper part during the rotation of the rotor and the lower parts are laminated. The thrust generated from the scrap iron can be offset. Therefore, it is possible to prevent the vibration of the rotor due to the thrust generated during rotation.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined only by the appended utility model registration claims.

Claims (1)

In the compressor rotor, in which a plurality of iron pieces are stacked between the upper end ring 11 and the lower end ring 13, in the upper part of the rotor, the long holes formed on the outer circumference are inclined to the right or left side, and the lower pieces are stacked on the upper part. The vibration reduction compressor rotor, characterized in that the lamination of the iron pieces are inclined in the direction corresponding to the inclined direction of the laminated long hole.