JP2000265956A - Rotor of motor for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost by forming a balancer of a board and integrally attaching the balancer and a plate to a rotor in the rotor for a motor for a compressor provided with the plate preventing oil from discharged from a discharge pipe and the balancer for balancing the rotation. SOLUTION: A rotation compressor element 10 stored in the bottom of a closed container 1 is provided with a pair of top/bottom cylinders 12A, 12B arranged across a partition plate 11, and eccentric rollers 13A, 13B eccentrically rotating by fittedly inserting and interlocked with bottom eccentric parts 21A, 21B of a crankshaft 21 rotated by a motor element 20. The motor element 20 comprises a stator 22 stored in and fixed to the top in the closed container 1, and a rotor 31 internally inserted in the stator so as to freely rotate and having a permanent magnet embedded therein. In this case, the rotor 31 is so constituted that a laminated iron core 32, end rings 35, 36, a balancer 50A, and a plate 51 are integrated together by inserting a rivet in an insertion hole and calking its top/bottom both ends.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a compressor motor.

[0002]

2. Description of the Related Art Conventionally, as a rotor for a compressor motor of this type, there is one disclosed in Japanese Patent Application Laid-Open No. 9-151850. This publication discloses an example in which a rotor of a DC motor is used for a refrigerant compressor.

[0003] In such a rotor, the rotational balance may be poor. In such a case, a balancer formed by a die is attached to the rotor.

[0004]

In the rotor to which the above-described balancer is attached, if the accuracy of the balancer formed by the mold is to be increased, the manufacturing cost is increased, and the accuracy is slightly reduced. In such a case, the rotation may be out of balance, the rotation may not be smooth, and there is a possibility that the meaning of attaching the balancer may be lost.

The present invention provides a rotor for a compressor motor which is inexpensive to manufacture.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a compressor having a plate for preventing oil from being discharged from a discharge pipe and a balancer mounted for balancing rotation. In the rotor of the electric motor, the balancer is formed of a plate material, and the balancer and the plate are integrally attached to the rotor.

Further, the balancer is formed by stamping a plate material.

Further, a plurality of balancers having different areas formed by punching the plate material are used side by side, or a plurality of balancers are used in an overlapping manner.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 show a first embodiment of a hermetic rotary compressor according to the present invention, and FIG. 6 shows a first embodiment.

As shown in FIG. 1, reference numeral 1 denotes a closed container,
The closed container 1 includes a cylindrical body 2 having a bottom and a body 2
And an end case 3 which covers and closes the upper end opening 2a of the lubricating oil O.
Is an oil sump 4 in which oil is stored.

A rotary compression element 10 of, for example, a two-cylinder type is accommodated in the lower part of the closed container 1. 12A, 12B and lower eccentric portions 21A, 21B of a crankshaft 21 provided in the compression chambers P1, P2 of the cylinders 12A, 12B and driven to rotate by an electric element (DC motor) 20, which will be described later. Eccentric roller 1 that is eccentrically rotated with a 180 ° phase relationship
Upper and lower bearing members 1A, 13B and upper and lower end surfaces of the respective cylinders 12A, 12B which are fastened and fixed by bolts 15A, 15B, respectively, and which support the crankshaft 21.
4A and 14B.

Further, the respective cylinders 12A, 12B
Are formed with suction passages 16A and 16B for the refrigerant gas communicating with the compression chambers P1 and P2, respectively. These suction passages 16A and 16B are provided on the lower side surface of the body 2 of the closed container 1. They are connected to the provided refrigerant gas suction pipes 5A and 5B, respectively.

Further, the upper and lower bearing members 14A, 14A
B includes cups 17A, 17 forming muffler chambers for reducing noise due to pressure pulsation of the refrigerant gas during operation.
B are fitted respectively, and a discharge port 18A communicating with the low-pressure side space 1A in the closed container 1 is provided in the upper cup 17A, and the discharge port 18A is connected to the first compression chamber P1 through the discharge port 18A. The compressed refrigerant gas is discharged into the low-pressure side space 1 </ b> A in the closed container 1.

On the other hand, the lower cup 1 is provided on the outer peripheral edge side of the cylinders 12A and 12B and the lower bearing member 14B.
Discharge passage 18B communicating with the muffler chamber formed by 7B
The discharge passage 18B communicates with the low-pressure side space 1A in the closed vessel 1 through a communication pipe 6 provided on the outside of the closed vessel 1, and the second compression chamber P2 The compressed refrigerant gas is discharged into the low-pressure side space 1A in the closed vessel 1.

That is, the rotary compression element 10 passes through the refrigerant gas suction pipes 5A and 5B from the refrigerant gas suction pipes 5A and 5B through the suction passages 16A and 16B by the eccentric rotation of the eccentric rollers 13A and 13B by the rotation drive of the crankshaft 21 of the electric element 20. And compresses the refrigerant gas sucked into the compression chambers P1 and P2 of the cylinders 12A and 12B, discharges the compressed high-pressure refrigerant gas into the closed casing 1, and simultaneously rotates the rotor 31 of the electric element 20. The air is discharged from the discharge pipe 7 provided in the end case 3 forming the top of the closed vessel 1 to the outside of the body through the refrigerant passage hole 38 and the air gap E provided in the airtight container 1, or the passage 25, and is connected to the discharge pipe 7. The liquid is discharged to a refrigeration unit circuit (not shown).

An electric element 20 for driving a crankshaft 21 interlocked with the rotary compression element 10 includes a stator 22 housed and fixed in the upper part of the closed casing 1 and is rotatable by the stator 22. And a rotor 31 having a permanent magnet (not shown) embedded therein, and an upper portion of the crankshaft 21 fixed to a central shaft portion of the rotor 31 in a press-fit state. And the stator 22 comprises:
A laminated iron core 23 made of a laminate of thin iron plates formed by punching a silicon steel plate into a substantially annular shape and forming a slot in the inner periphery thereof.
And a fixed winding 24 wound in a plurality of layers on the laminated iron core 23 while being shifted in the circumferential direction by a predetermined angle difference. 2
5 is cut along the vertical direction, and a passage through which the refrigerant gas and the mist-like lubricating oil can pass is formed between the vertical groove 25 and the inner peripheral side surface of the closed container 1. ing.

On the other hand, as shown in FIGS. 2 to 5, the rotor 31 includes a cylindrical laminated iron core 32 in which a permanent magnet 60 made of a laminated body of silicon steel sheets is embedded, and a laminated iron core 32.
An insertion hole 33 through which the crankshaft 21 is inserted and fixed in a press-fit state, and a rod-shaped fixing member 34 such as a rivet formed through the outer periphery of the insertion hole 33.
And end plates 35, 36 in the form of flat disks disposed on the upper and lower end surfaces of the laminated iron core 32, a balancer 50, a plate 51, a magnet 52, and an oil discharge hole 53. Incidentally, 61 is a through hole.

The laminated iron core 32, the disc-shaped end rings 35 and 36, the balancer 50, and the plate 51 are inserted, for example, with rivets 34 as fixing members through insertion holes, and the upper and lower ends thereof are connected. By crimping and crushing deformation, they are assembled and connected to each other, thereby preventing a permanent magnet (not shown) embedded in the laminated iron core 32 from jumping out when the rotor 31 rotates. In addition, the rivet 37 is formed in a tubular structure having a hollow portion 38, and the hollow portion 38 serves as a refrigerant passage hole through which the refrigerant gas and the mist-like lubricating oil can pass.

Further, between the inner peripheral side surface of the laminated iron core 23 of the stator 22 and the outer peripheral side surface of the laminated iron core 32 of the rotor 31, a delicate passage of refrigerant gas and mist-like lubricating oil is possible. A large air gap E is formed.

The balancer and the plate are manufactured by stamping a plate material, and the balancer is manufactured from, for example, brass. As the shape of the balancer 50, there are shapes indicated by 50A, 50B, and 50C.

The balancer 50A replaces the portion 50M with the portion 50M.
By making the area larger than N, the center of gravity is positioned on the portion 50M side, and since the 50A is formed integrally, it does not come apart and the assembling workability is good.

The balancer 50B has two parts 50X, 50
Y, and has a shape that allows various changes in balance by changing the size of the four portions 50X and 50Y.

The balancer 50C is composed of portions 50Z, 50Z, and the portion 50Z may be considered to be integrally formed with the portion 50X.

FIG. 5 is a side view showing a state where the plate 51 and the balancers 50A and 50B are overlapped.

In the rotor configured as described above, since the balancer is formed of a plate material and is attached to the rotor integrally with the plate, it is not necessary to separately attach the plate to a bearing or the like, thereby reducing the manufacturing cost. Can be done. Further, since the balancer is formed by stamping a plate material, it is easy to manufacture the balancer, and it is not necessary to use an expensive material such as a mold.

Further, when a plurality of balancers are used side by side (see balancers 50B and 50C), the portions 50X, 50X
By changing the area of 50Y and 50Z, fine balance adjustment is possible.

During operation of the compressor, the plate 51 disperses the mist-like lubricating oil in the refrigerant gas radially by centrifugal force and adheres to the surroundings, so that the refrigerant gas and the mist-like lubrication oil are dispersed. It has the function of separating oil.

Next, a second embodiment will be described. First
The difference from the embodiment is that a plurality of balancers are stacked.

The balancer 50D includes plates 50F and 50F.
G, and the balancer E includes a balancer 50G and a balancer (part) 50Y.

As described above, when a plurality of balancers are stacked, the weight balance is largely decentered at the rotor portion, so that the entire rotation balance when the balancer is coupled to the rotary compression element 10 can be obtained. And so on.

[0031]

As described above, according to the first aspect of the present invention, in the rotor, the balancer is formed of a plate material and is attached to the rotor integrally with the plate. There is no need to attach to bearings, etc.
Manufacturing costs can be reduced.

According to the second aspect of the present invention,
Since the balancer is formed by stamping a plate material, it is easy to manufacture the balancer, and it is not necessary to use an expensive thing such as a mold, and an inexpensive rotor can be provided.

Further, when a plurality of balancers are arranged and used as in the third aspect of the present invention, fine balance adjustment can be performed by changing the area of the balancers.

According to the fourth aspect of the present invention, a plurality of balancers are overlapped, and the weight balance is largely eccentric at the rotor portion, so that the entire structure when the rotary compression element is connected is obtained. There is an effect that the rotation balance can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a compressor using a rotor of the present invention.

FIG. 2 is a plan view of the rotor of the present invention as viewed from above.

FIG. 3 is a longitudinal sectional view of the rotor.

FIG. 4 is a bottom view of the rotor viewed from below.

FIG. 5 is an explanatory view showing a first embodiment of the rotor.

FIG. 6 is an explanatory view showing a second embodiment of the rotor.

[Explanation of symbols]

51 plate 31 rotor 50A, 50B, 50C, 50F, 50G, 50Y
Balancer

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Keishiro Igarashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masaaki Takezawa 2-chome Keihanhondori, Moriguchi-shi, Osaka No.5-5 Sanyo Electric Co., Ltd. F term (reference) 3H003 AA05 AB04 AC03 BB00 CE03 CF05 3H029 AA04 AA09 AA13 AA21 AB03 BB05 BB31 CC07 CC27 CC30 CC42 5H615 AA01 BB01 BB04 BB07 BB14 BB17 PP54 SS03 SS05 SS20 SS

Claims (4)

[Claims] 1. A compressor motor rotor comprising: a plate for preventing oil discharge from a discharge pipe; and a balancer mounted for balancing rotation.
A rotor for a compressor motor, wherein the balancer is formed of a plate material, and the balancer and the plate are integrally mounted on the rotor. 2. The compressor motor rotor according to claim 1, wherein the balancer is formed by stamping a plate material. 3. A rotor for a compressor motor according to claim 1, wherein a plurality of balancers having different areas formed by stamping said plate material are used. 4. The balancer according to claim 1, wherein a plurality of balancers formed by stamping said plate material are used.
The rotor of the electric motor for a compressor according to claim 1.