JPS6018632Y2 - hermetic compressor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hermetic compressor in which an integral combination of an upper electric motor and a lower compression mechanism is installed in a hermetic container.

Hermetic compressors have a noise-reducing muffler installed above the motor because it is easiest to create play space above the motor.

However, the upper area of this electric motor is the only adjustment point for alignment between the stator and rotor when the electric motor is installed in a container, so it is not possible to install the above-mentioned muffler at this point. There was a problem in installing the electric motor according to regulations, which resulted in extremely frequent customers.

The present invention was devised in view of the above points, and the muffler is divided into parts, and the long arc-shaped holes formed in the muffler are also used as adjustment peepholes for gas flow. By passing a series of mounting bolts through the stator, the motor can be easily installed without impairing the function of the muffler, and the annular air formed between the stator and rotor of the motor can be easily installed. The object of the present invention is to provide a hermetic compressor whose gap can be adjusted without eccentricity.

The technical means of the present invention to solve this technical problem is to mount the stator of the electric motor on the block of the compression mechanism, ground the plurality of legs hanging from the periphery of the base on the stator, and A plurality of bolts are screwed into the block through the stator from above the legs to connect the base, stator, and block together, while also connecting the stator and the rotor therein. An appropriate number of arc-shaped elongated holes are formed in the base to face the annular air gap formed therebetween, and a chamber communicating with the elongated holes is formed in a cover removably provided on the base. The muffler is made into a muffler, and the chamber and the cylinder formed in the block are connected via a connecting pipe.

According to this technical means, when the cover that is removably attached to the base is removed from the base, the air gap can be visually observed through the circular arc-shaped hole formed in the base, so that the compressor can be assembled easily. At times, the air gap can be adjusted without eccentricity.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a compressor in which an integral combination of an upper electric motor 2 and a lower compression mechanism 3 is supported in a sealed container 1 by appropriate springs (not shown).

The compression mechanism 3 has a crank chamber 8 formed within a block 7 formed by fixing a lower bearing 5 to the lower surface of a crankcase 4 with an appropriate number of bolts 6, and an upper portion of the upper portion of the block 7. The bearing 9 and the lower bearing 5 support an electric shaft (hereinafter referred to as the crankshaft 10), and the crankshaft 10
The piston 12 supported on the crank pin 11 in
It is configured to be slidably supported by a cylinder 13 formed in the block 7.

On the other hand, the electric motor 2 includes a stator 37 mounted on the block 7 of the compression mechanism 3 and fixed with bolts 36;
The crankshaft 10 is fixed to the center of the rotor 38.

Further, an intake muffler 42 consisting of a lower base 40 and an upper cover 41 is installed above the electric motor 2.

As shown in FIG. 2, the base 40 has four legs 43, 43, 43, 43 formed on the periphery of a circular plate, and bolts 36 inserted into the ground plane of each leg 43... is screwed into the block 7 through the stator 37 of the electric motor, and a plurality of circular arc-shaped elongated holes 46, 46 are formed facing the annular air gap 45 between the stator 37 and the rotor 38. ing.

On the other hand, the cover 41 has a crater-like depression 47 in the center, and the periphery of the depression 47 swells like an atoll. The elongated hole 46 is formed inside the cover 41.
, 46, and the other end of the connecting pipe 50, one end of which is fixed to the chamber 49, is connected to the cylinder 13.
It is connected to the head cover 51 at.

The illustrated embodiment is distantly related to that described above, and the operation will be explained below.

When the crankshaft 10 is rotated by the electric motor 2 and the piston 12 is reciprocated within the cylinder 13, the suction pipe 52
The gas sucked into the container 1 from above is sucked into the chamber 49 through the long holes 46, 46 of the upper suction muffler 42, and then sucked into the cylinder 13 via the connecting pipe 50 and the head cover 51, where it is compressed. The gas is discharged from the discharge pipe 53 to the outside of the container 1.

In this case, the suction muffler 42 exhibits a muffling function by attenuating the compression and suction sounds reversely transmitted from the head cover 51 through the connecting pipe 50.

In the illustrated embodiment, the muffler 42 is used for suction, but if the interior of the container 1 is of a high-pressure dome type, it is of course easy to use the muffler 42 for discharge.

As described in detail above, the present invention has the block 7 of the compression mechanism 3.
The stator 37 of the electric motor 2 is mounted on top of the stator 37, and a plurality of legs 43 hanging from the periphery of the base 40 are grounded on the stator 37, and the stator is mounted from above the legs 43. A plurality of bolts 36 pass through 37 and are inserted into the block 7.
... to connect the base 40, stator 37, and block 7 together, while the stator 3
An appropriate number of arcuate long holes 46, 4 facing the annular air gap 45 formed between the rotor 7 and the rotor 38 therein.
6 is formed on the penis 40. Therefore, when assembling the electric motor 2 on the upper part of the compression mechanism 3, the rotor 38 is first fixed to the electric motor 10, and then the stator is attached around the rotor 38. 37, place the base 40 thereon, and tighten the bolts 36 while looking through the long holes 46, 46 so that the annular air gap 45 between the stator 37 and the rotor 38 is maintained uniformly. can be tightened.

Normally, in order to prevent the air gap 45 from being eccentric, the stator 37 would have to be fixed independently to the block 7, and then the stator 37 and the muffler 42 would have to be fixed with another bolt, but in this application, the stator 37 is fixed to the block 7. Since the stator 37 and the base 40 can be fixed at the same time with the bolts 36, the number of processing and assembly steps can be reduced, and the air gap 45 can also be adjusted.Furthermore, by finally fixing the cover 41 to the base 40, the muffler can be fixed. can be configured.

Therefore, it is possible to reduce the number of man-hours required for processing and assembling this type of compressor without impairing the motor function or noise reduction function.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view of the main part of FIG. 1. 2...Electric motor, 3...Compression mechanism, 7.
...Block, 10...Electric shaft, 13.
・=・・・Cylinder, 36・・・・Bolt, 37・
...Stator, 38...Rotor, 40...
...Base, 41...Cover, 42...
...muffler, 43...legs, 45...
・Air gap, 46... Long hole, 49...
...Chamber, 50...Connecting pipe.

Claims (1)

[Scope of utility model registration request] The stator 37 of the electric motor 2 is mounted on the block 7 of the compression mechanism 3, and a plurality of legs 43 hanging from the periphery of the base 40 are grounded on the stator 37, and these legs 43
While screwing a plurality of bolts 36 into the block 7 from above through the stator 37 to connect the base 4.0, stator 37, and block 7 together, An appropriate number of arc-shaped elongated holes 46, 46 are formed in the base 40 to face the annular air gap 45 formed between the stator 37 and the rotor 38 therein. A cover 4 that is removably attached to the
1, a chamber 49 that communicates with the elongated holes 46, 46 is formed to form a muffler, and the chamber 49 and the cylinder 13 formed in the block 7 are connected via a connecting pipe 50. Machine.