JP2002295371A - Gas compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas compressor reduced in outward propagation of mechanical vibration generated from the compressor. SOLUTION: A viscous elastic retention member 21 is interlaid between the outer peripheral surface of a compressor body 7 and the inner peripheral surface of a housing 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas compressor for sucking and compressing gas by mechanical movement.

[0002]

2. Description of the Related Art As a gas compressor for sucking and compressing a gas by mechanical movement, for example, there is a vane type gas compressor used for a car air conditioner or the like.

Referring to FIG. 3, an outline of a vane type gas compressor will be described. A cylinder chamber 4 is formed by being surrounded by a cylinder block 1, side blocks 2, 3, and is disposed in the cylinder chamber 4. A compressor body 7 is composed of a rotor 5, a vane 6, etc., which can radially protrude and retract around the rotor 5, and the vane 6 rotates with the cylinder chamber 4 as the rotor 5 rotates.
The compression chamber formed by dividing and contracting and expanding repeatedly,
Inhale and compress gas.

The compressor body 7 includes a rear housing 8,
It is surrounded by a housing 10 composed of a front housing 9 and is isolated and sealed from the outside. Compressor body 7
Are directly fitted into the housing 10 and come into contact with each other,
Moreover, the cylinder block 1, the front side block 2, and the front housing 9 are fastened together by several fastening flange bolts 11 and are firmly fixed to each other.

[0005] Reference numeral 12 denotes a discharge port provided in the rear housing 8, through which the gas compressed in the compression chamber is discharged to the outside.
Although not shown, the front housing 9 includes
A suction port is provided, and gas is sucked from the outside into the compression chamber via the suction port.

Further, 13 is a bolt for fastening the rear housing 8 and the front housing 9 and 14 is a rotor 5
The shaft 14 is rotatably held by bearings 15 and 16, and its end is connected to an electromagnetic clutch 17.
Connected to the driven side. A pulley 18 is provided on the driving side of the electromagnetic clutch 17.
Rotational power is transmitted to the motor 8 from an external engine or the like, and the rotor 5 is rotated via the electromagnetic clutch 17.

[0007] Although not shown, the gas compressor includes a well-known mounting means in the housing 10 and is mounted on an external support such as an engine frame.

In the conventional gas compressor described above, the compressor body 7 and the housing 10 come into direct contact with each other and are integrally fastened together by the fastening flange bolts 11. Vane 6 in compressor body 7
Vibration caused by sliding of the sliding contact portion with other parts and other mechanical movements propagates from the housing 10 to the outside through the mounting means or the discharge port and the suction port, and in some cases, the gas compressor is mounted. Vibration was amplified by an external support or the like, and the gas compressor was a source of vibration and noise.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a gas compressor in which the propagation of mechanical vibration generated from the gas compressor to the outside is reduced.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a compressor body for sucking and compressing a gas by mechanical movement, a compressor body hermetically sealed therein, and a compressor body. A housing including a suction port for taking in the gas to be taken in from the outside, a discharge port for discharging the compressed gas to the outside, and mounting means for mounting the gas to the external support; and between the compressor body and the housing. And a viscoelastic holding member made of a viscoelastic material interposed therebetween.

In the above invention, if the viscoelastic holding member is interposed between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing, the compressor main body is reliably held particularly in the radial direction.

In the above invention, the viscoelastic holding member may be press-fitted between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing, or the outer peripheral surface of the compressor main body or the inner peripheral surface of the housing may be tapered. If the viscoelastic holding member is crushed and press-fitted by this taper, the axial holding of the compressor body is also ensured.

In the above invention, if the viscoelastic holding member is interposed between the end face of the compressor main body and the end face of the housing, the compressor main body is securely held particularly in the axial direction.

A first member constituting the compressor body;
For example, a flange portion of the rear housing, a second member,
For example, the flanges of the front housing may be abutted, and these flanges may be surrounded by the viscoelastic holding member.

In the case of a gas compressor having a rotor in the compressor body, if the rotor and the viscoelastic holding member are arranged concentrically, the vibration component in the rotor rotation direction is well absorbed.

[0016]

Embodiments of the present invention will be described below.
This will be described with reference to FIGS.

[First Embodiment] FIG. 1 is a longitudinal sectional view of a gas compressor showing a first embodiment of the present invention.
1, the same parts as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, the inner peripheral surface 8a of the rear housing 8 is tapered so that the front housing 9 is slightly wider. On the other hand, the outer peripheral surface 1a of the cylinder block 1 of the compressor main body opposed thereto is a cylindrical surface, and a wedge-shaped circle is formed between the inner peripheral surface 8a of the rear housing and the outer peripheral surface 1a of the cylinder block. Ring space 2
0 is formed.

An annular viscoelastic holding member 21 made of a nitrile rubber, which is a viscoelastic material, is provided on the outer periphery of the cylinder block 1.
Adhesive. The outer diameter of the viscoelastic holding member 21 is slightly larger than that of the annular space 20. The cross-sectional shape of the viscoelastic holding member 21 may be either tapered or rectangular in accordance with the annular space 20, but has a squeeze.

When assembling the gas compressor, the compressor body 7
Of the viscoelastic holding member 21 by applying pressure to the rear housing 8.
And insert it. By this press-fitting, the viscoelastic holding member 2
1 is elastically deformed, fits in the annular space 20, and is interposed between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing to elastically connect the compressor main body 7 and the rear housing 8 to each other. Fix it.

After that, the front housing 9 is
By fixing to the rear housing 8 by 3, the axial position of the compressor body 7 is defined.

An end surface 9a of the front housing 9 and an end surface 2a of the front side block 2 which is in contact with the end surface 9a,
The inner peripheral surface 9b on the front housing side of the rear housing 8 and the outer peripheral surface 2b of the front side block 2 in contact with the inner peripheral surface 9b are in a frictional contact state in which the O-ring 22 is elastically deformed and sandwiched.

The outer peripheral surface 3a of the rear side block 3
And the inner peripheral surface 9 of the rear housing 8 in contact with the outer peripheral surface 3a.
a is in a frictional contact state in which the O-ring 23 is elastically deformed and sandwiched.

By such elastic fixing, the compressor main body 7 is firmly held in the housing 10, and furthermore, the housing 10 and the compressor main body 7 do not come into direct contact with each other, so that the compressor main body 7 for suction compression is used. The vibration generated by the mechanical movement is transmitted to the housing 10 via the viscoelastic holding member 21, and the vibration is absorbed by the damper function of the viscoelastic holding member 21, and the vibration transmitted to the housing 10 is greatly reduced. You.

In this embodiment, the rotor 5 and the viscoelastic holding member 21 are both arranged concentrically about the center axis of the shaft 14. Therefore, the viscoelastic holding member 21 efficiently absorbs the vibration component in the rotation direction of the rotor 5. Further, when the rotor lock occurs due to the seizure of the compressor body or the like, the connection between the viscoelastic holding member 21 and the outer peripheral surface 1a of the compressor main body 7 or the inner peripheral surface 8a of the housing 10 is limited only by the frictional force. The shaft 14,
The rotational force of the rotor 5 causes the friction coupling portions (1a, 8a) of the viscoelastic holding member 21 to slide, and the entire compressor body rotates.
Thereby, more serious accidents such as engine stop can be avoided.

In the first embodiment, the annular space 20 into which the viscoelastic holding member 21 is inserted has a wedge-shaped cross section by tapering the outer peripheral surface of the compressor main body 7, or the outer peripheral surface of the compressor main body 7 is It is also possible to form a wedge-shaped cross-section by tapering the inner peripheral surface of both of them. Further, if the squeezing is slightly reduced, any of the inner and outer peripheral surfaces can be formed into a cylindrical annular cross section having a rectangular cross section.

Alternatively, a viscoelastic material may be poured into the annular space 20 without being pressed into the viscoelastic holding member 21 and adhered to the outer peripheral surface of the compressor body 7 and the inner peripheral surface of the housing 10 to be formed. It may be.

[Second Embodiment] FIG. 2 is a longitudinal sectional view of a gas compressor according to a second embodiment of the present invention.
2, the same parts as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 2, a flange portion 24 is formed on the front side block 2 side of the cylinder block 1 (first member) constituting the compressor body 7. Further, a flange portion 25 is formed on the cylinder block 1 side of the front side block 2 (second member) so as to face the flange portion 24.

The flange portions 24 and 25 are butted against each other, and a ring (viscoelastic holding member) 26 made of fluororesin rubber and having a U-shaped cross section is fitted around the flange portions 24 and 25. The cylinder block 1 and the front side block 2 are fixed by screws (not shown).

The viscoelastic holding member 2 of the rear housing 8
The inner peripheral surface 8c facing 6 forms a step with a diameter slightly larger than that of the viscoelastic holding member 26.

When assembling the gas compressor, the compressor body 7
Is pushed into the rear housing 8, and the outer periphery of the viscoelastic holding member 26 is elastically deformed and inserted. By this press-fitting, the compressor body 7 and the rear housing 8 are elastically fixed in the radial direction by being interposed between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing.

After that, the front housing 9 is
3, the end portions 2 of the viscoelastic holding member 26 are located between the end surfaces of the flange portions 24, 25 of the compressor body and the end surfaces 8d, 9a of the housing 10.
6a and 26b are interposed. Thus, the viscoelastic holding member 26 elastically fixes the compressor body 7 and the housing 10 in the axial direction, and defines the position in the axial direction.

The outer peripheral surface 3a of the rear side block 3 and the inner peripheral surface 8a of the rear housing 8 in contact with the outer peripheral surface 3a
The O-ring 23 is in a frictional contact state by being elastically deformed and sandwiched.

By such elastic fixing, the compressor main body 7 is firmly held in the housing 10, and furthermore, the housing 10 and the compressor main body 7 do not come into direct contact with each other, so that the compressor main body 7 for the suction compression is used. The vibration generated by the mechanical motion is transmitted to the housing 10 via the viscoelastic holding member 26, and the vibration is absorbed by the damper function of the viscoelastic holding member 26, and the vibration transmitted to the housing 10 is greatly reduced. You.

In this embodiment, both the rotor 5 and the viscoelastic holding member 26 are arranged concentrically about the center axis of the shaft 14. Therefore, the viscoelastic holding member 26 efficiently absorbs the vibration component in the rotation direction of the rotor 5. Further, in the case where the rotor lock occurs due to the seizure of the compressor body or the like, the connection between the viscoelastic holding member 26 and the outer peripheral surface 1a of the compressor main body 7 or the inner peripheral surface 8a of the housing 10 is limited only by the frictional force. The shaft 14,
The rotational force of the rotor 5 causes the friction coupling portions (1a, 8a) of the viscoelastic holding member 26 to slide, and the entire compressor body rotates.
Thereby, more serious accidents such as engine stop can be avoided.

Vibration components in the radial direction of the compressor body 7 and in the rotation direction of the rotor 5 are well absorbed by the viscoelastic holding member 26 as in the first embodiment. The axial vibration component is
Since the damper action of both end portions 26a and 26b of the viscoelastic holding member 26 works, the absorption is more improved than in the first embodiment.

The mounting position of the viscoelastic holding member according to the present invention is not limited to the above-described embodiment as long as it is between the compressor main body and the housing, and can be appropriately selected. Also, the viscoelastic holding members can be arranged dispersedly like the outer peripheral surface of the cylinder block, the end surface of the front side block, and the end surface of the rear side block.

As the viscoelastic material of the viscoelastic holding member in the present invention, a viscoelastic material having excellent durability such as hydrogenated nitrile rubber, silicon rubber, ethylene propylene rubber, chloroprene, etc., in addition to nitrile rubber and fluororesin rubber, may be used. Can be used.

[0040]

As described above in detail, according to the present invention, since the viscoelastic holding member is interposed between the compressor main body and the housing, the housing and the compressor main body do not directly contact with each other, and the suction compression is performed. Generated by the mechanical movement of the compressor body for the transmission is transmitted to the housing via the viscoelastic holding member. Therefore, the vibration is absorbed by the damper function of the viscoelastic holding member, the vibration transmitted to the housing side is greatly reduced, and the vibration and noise in the gas compressor mounting environment are significantly reduced.

Further, if the viscoelastic holding member is interposed between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing, the compressor main body can be reliably held in the radial direction in addition to vibration absorption. When the viscoelastic holding member is press-fitted between the outer peripheral surface of the compressor main body and the inner peripheral surface of the housing, or further, when the outer peripheral surface of the compressor main body or the inner peripheral surface of the housing is press-fitted, the above-described vibration absorption is achieved. The effect becomes more pronounced.

Further, if the viscoelastic holding member is interposed between the end face of the compressor main body and the end face of the housing, in addition to vibration absorption, the holding of the compressor main body in the axial direction is ensured.

When the flange of the first member and the flange of the second member constituting the compressor main body are abutted with each other and these flanges are surrounded by the viscoelastic holding member,
The compressor body is securely held in the housing via the viscoelastic holding member in both the radial direction and the axial direction, and has excellent impact resistance.

When the rotor of the compressor body and the viscoelastic holding member are arranged concentrically, the viscoelastic holding member efficiently absorbs the vibration component in the rotation direction of the rotor. Further, in the case of a rotor lock due to seizure or the like, since the connection between the viscoelastic holding member and the outer peripheral surface of the compressor body or the inner peripheral surface of the housing is based only on the frictional force, the viscoelastic holding is performed by the rotational force of the rotor. The frictional joint of the member slips, the whole compressor body rotates,
Secondary troubles such as engine stop can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a conventional gas compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder block (1st member) 1a Outer peripheral surface of a Linda block 2 Front side block (2nd member) 3 Rear side block 4 Cylinder chamber 5 Rotor 6 Vane 7 Compressor body 8 Rear housing 8a Rear housing inner peripheral surface 9 Front housing DESCRIPTION OF SYMBOLS 10 Housing 11 Fastening flange bolt 12 Discharge port 20 Wedge-shaped annular space 21 Viscoelastic holding member 24 Flange part 25 Flange part 26 Viscoelastic holding member

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Okiwa Kuwahara 4-3-1, Yashiki, Narashino City, Chiba Prefecture Seiko Seiki Co., Ltd. F-term (reference) 3H003 AA05 AC03 BA02 BA08 CD01 CE01 3H029 AA05 AB03 BB21 CC02 CC09 CC28 CC38 3H040 AA09 BB11 CC10 CC16 DD01 DD02 DD36

Claims (7)

[Claims] A compressor body for sucking and compressing a gas by mechanical movement, a suction port for sealing the compressor body inside, and for taking in the gas sucked by the compressor body from the outside;
A housing having a discharge port for discharging the compressed gas to the outside, and a mounting means for mounting the compressed gas to an external support; and a viscoelastic material made of a viscoelastic material interposed between the compressor body and the housing. A gas compressor comprising a holding member. 2. The gas compressor according to claim 1, wherein the viscoelastic holding member is interposed between an outer peripheral surface of the compressor body and an inner peripheral surface of the housing. 3. The gas compressor according to claim 2, wherein the viscoelastic holding member is press-fitted between an outer peripheral surface of the compressor body and an inner peripheral surface of the housing. 4. The compressor according to claim 3, wherein the outer peripheral surface of the compressor body or the inner peripheral surface of the housing into which the viscoelastic holding member is press-fitted is tapered, and the viscoelastic holding member is crushed and press-fitted by the taper. Gas compressor. 5. The gas compressor according to claim 1, wherein the viscoelastic holding member is interposed between an end face of the compressor body and an end face of the housing. 6. The gas compression apparatus according to claim 1, wherein a flange portion of the first member and a flange portion of the second member constituting the compressor body abut against each other, and these flanges are surrounded by the viscoelastic holding member. Machine. 7. The gas compressor according to claim 1, further comprising a rotor provided on the compressor body, wherein the rotor and the viscoelastic holding member are arranged concentrically.