JPH0968180A - Gas compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas compressor of small size and light weight which prevents a noise when it is operated. SOLUTION: A thick part 18 as a sound shield means is provided not in a whole part of a casing 1 but in only a part. The thick part 18 is formed in a position opposed to the peripheral surface of a cylinder 6 and constituted to interrupt an operating sound caused by compressing action in a compression mechanism part 3. A shape of the thick part 18 and its thickness are determined by considering interruption of a vane sliding sound, high pressure refrigerant gas delivering sound, or the like to outside the casing and prevention of vibration of the casing 1 due to these sounds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and lightweight vane rotary type gas compressor which prevents noise during operation.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a gas compressor of this type has a structure in which an opening end 1a of a casing 1 is closed by a front head 2 and a compression mechanism portion 3 is housed in the casing 1. ing.

The compression mechanism section 3 includes a front side block 4
And a rear side block 5, there is a cylinder 6 having a substantially elliptic cylindrical shape on the inner circumference, and a rotor 8 is rotatably provided horizontally in a cylinder chamber 7 formed by the side blocks 4, 5 and the cylinder 6.

As shown in FIG. 3, the rotor 8 is formed with slit-shaped vane grooves 9, 9 ... In the radial direction, and the vanes 10, 9 ... The vanes 10, 10, ... Are urged toward the inner wall of the cylinder 6 by the centrifugal force and the hydraulic pressure at the bottom of the vane groove when the rotor 8 rotates.

Front and rear side blocks 4,
5, the small chambers in the cylinder chamber 7 partitioned by the cylinder 6, the rotor 8, the vanes 10, 10 ...
The rotation of the rotor 8 repeatedly changes the size of the volume.

When the volume of the compression chambers 11, 11, ...
Due to such a volume change, the refrigerant gas is sucked from the intake chamber 12 inside the front head into the cylinder chamber 7 side through the suction passage (not shown) of the front side block 4, and the refrigerant gas is compressed in the cylinder chamber 7. Is done.

The high-pressure refrigerant gas after compression is discharged from the discharge port 1
3, 13 and the discharge valves 14, 14 to discharge into the gaps 15 and 15 between the cylinder outer periphery and the casing inner wall, and from there through the discharge communication path (not shown) of the rear side block 5 and the oil separator 16 to the discharge chamber. To 17.

[0008]

However, in such a conventional gas compressor, since the casing 1 is provided with a substantially uniform and thin wall thickness from the viewpoint of downsizing and weight reduction, it is difficult to operate during its operation. Sounds generated inside the casing, for example, sliding noises of vanes 10, 10, ..., High-pressure refrigerant gas discharge noises, vibration noises of the casing 1 due to these noises, and other operation noises due to the compression operation in the compression mechanism section 3 are emitted As a result, there are problems such as leakage to the outside of the casing and noise.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a small-sized and lightweight gas compressor which prevents noise during operation.

[0010]

In order to achieve the above object, the invention according to claim 1 comprises a casing in which a compression mechanism portion for compressing a refrigerant gas is housed. A cylinder having a substantially elliptic cylindrical shape on the inner periphery provided between a pair of side blocks, a rotor rotatably mounted horizontally in a cylinder chamber formed by the both side blocks and the cylinder, and a vane groove provided in the rotor. And a vane slidably attached to the cylinder, and by the rotation of the rotor, sucks the refrigerant gas from the intake chamber into the cylinder chamber,
In a gas compressor that compresses this in a cylinder chamber and discharges the compressed high-pressure refrigerant gas to the discharge chamber side, an operation sound based on the compression operation in the compression mechanism section is generated in a part of the casing. It is characterized in that a sound insulating means for shutting off is provided.

According to a second aspect of the present invention, the sound insulation means is composed of a thick portion having a thick part of the casing, and the thick portion is formed at a position facing the peripheral surface of the cylinder. Characterize.

According to the present invention, the noise generated inside the casing during operation, such as the sliding noise of the vanes and the discharge noise of the high-pressure refrigerant gas, caused by the compression operation of the compression mechanism, is blocked by the sound insulating means, and the outside of the casing. The noise due to the leakage of the operation sound is prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a gas compressor according to the present invention will be described in detail with reference to FIG.

A basic structure of a gas compressor, for example, a compression mechanism 3 is housed in a casing 1. The compression mechanism 3 includes front and rear side blocks 4, 5, and a cylinder 6.
The cylinder chamber 7 formed by
The rotor 8 is horizontally rotatably installed inside the rotor 8.
The vane grooves 9, 9 ...
Is manually mounted, and when the rotor 8 rotates, the refrigerant gas is sucked into the cylinder chamber 7 from the intake chamber 12, and the refrigerant gas is compressed in the cylinder chamber 7.
Since the compressed high-pressure refrigerant gas is discharged into the discharge chamber 17 through the gap 15 between the cylinder outer circumference and the casing inner wall, etc., it is the same as the conventional one.
The detailed description is omitted.

As shown in FIG. 1, this gas compressor has a thick portion 18 as a sound insulating means in a part of the casing 1, and the thick portion 18 forms a part of the casing 1 in a thick wall. ing.

The compression mechanism portion 3 determines the position and shape of the thick portion 18 and the thickness of the thick portion 18.
It is determined from the relationship with the operation sound based on the compression operation in.

When the operation of the gas compressor is started, the vane 1
A sliding sound of 0, 10, ..., A discharge sound of high-pressure refrigerant gas, and the like are generated inside the casing 1. However, all of these sounds are operation sounds based on the compression operation in the compression mechanism section 3, and the compression mechanism section. Since 3 is the sound source, in order to effectively block the operation sound at the position closest to the compression mechanism portion 3 of the sound source, the thick portion 18 as described above is provided at a position facing the peripheral surface of the cylinder 6. It is formed and is provided to have a length substantially equal to the length from one end surface to the other end surface of the cylinder 6.

The thickness of the thick portion 18 is such that the vanes 10, 10 ...
It is determined not only to prevent the sliding sound of the above and the discharge sound of the high-pressure refrigerant gas from leaking to the outside of the casing, but also to prevent the vibration of the casing 1 due to these sounds.

That is, the thickness of the thick portion 18 is equal to the vane 1
It is possible to prevent leakage of sliding noises such as 0, 10 ... and high-pressure refrigerant gas from leaking to the outside of the casing, and to prevent the casing 1 from vibrating due to these noises.

The shape of the thick-walled portion 18 is also determined in consideration of the cutoff property of the sound generated inside the casing and the prevention of the vibration of the casing 1 due to the internally generated sound, similarly to the method of determining the thickness as described above. To be done. As the shape of the thick portion 18, for example, a ring-shaped surface having a curved surface or a ring-shaped surface having irregularities can be considered.

In the gas compressor of this embodiment, a thick wall portion 18 is formed in a portion of the casing 1 so as to have a thick wall.
And the thick portion 18 is provided in the cylinder 6
It is formed at a position facing the peripheral surface of. Therefore, the sound generated inside the casing during the operation of the compressor, for example, the sliding sound of the vanes 10, 10, the discharge sound of the high-pressure refrigerant gas, etc., is blocked by the thick portion 18 before leaking to the outside of the casing, and this kind of sound is generated. Noise due to leakage is reduced as much as possible, and operation is quiet. Further, since the thick-walled portion 18 is provided only on a part of the casing 1 rather than the entire casing 1, the entire casing does not increase in size, and the device itself is small and lightweight.

[0022]

In the gas compressor according to the present invention,
As described above, a part of the casing is provided with sound insulation means for cutting off the operation noise due to the compression operation in the compression mechanism section. Therefore, noise generated inside the casing during operation of the compressor, for example, sliding noise of vanes, discharge noise of high-pressure refrigerant gas, etc., is blocked by the sound insulating means before leaking to the outside of the casing, and noise of this kind is prevented. It is possible to do quiet driving. Further, since the sound insulation means is provided only on a part of the casing rather than the whole, it is suitable for reducing the size and weight of the device without increasing the size of the entire casing.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of a gas compressor according to the present invention.

FIG. 2 is a cross-sectional view of a conventional gas compressor.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 1 Casing 3 Compression Mechanism 4 Front Side Block 5 Rear Side Block 6 Cylinder 8 Rotor 9 Vane 18 Thick Part (Sound Insulation Means)

Claims (2)

[Claims] 1. A compression mechanism part for compressing a refrigerant gas is housed in a casing, wherein the compression mechanism part is a cylinder having an inner peripheral substantially elliptical cylinder provided between a pair of side blocks. The rotor rotatably laterally installed in a cylinder chamber formed by the both side blocks and the cylinder, and a vane slidably mounted in a vane groove provided in the rotor, ,
In a gas compressor, the refrigerant gas is sucked from the intake chamber into the cylinder chamber, compressed in the cylinder chamber, and the compressed high-pressure refrigerant gas is discharged to the discharge chamber side. A gas compressor provided with a sound insulation means for cutting off an operation sound due to a compression operation in a mechanical section. 2. The sound insulation means comprises a thick portion having a thick part of the casing, and the thick portion is formed at a position facing the peripheral surface of the cylinder. 1. The gas compressor according to 1.