JP6706335B2 - Compressor - Google Patents

Description

The present invention relates to a compressor, and more particularly to a compressor having a vibration isolation structure.

As a technique capable of reducing vibration and noise of a compressor, there is, for example, one described in Patent Document 1. Patent Document 1 is an oil-cooled screw compressor in which a compressor body and an electric motor 11 are coaxially connected in a horizontal direct coupling structure, and an oil separation container is arranged below the compressor body. A structure in which an oil separation container and legs extending vertically from the electric motor support them, and a vibration-proof rubber is arranged between the bottom of the oil separator machine, the end of the leg opposite to the electric motor, and the gantry. Is disclosed.

JP, 2007-92702, A

The oil-cooled screw compressor of Patent Document 1 has a structure in which a compressor body, an electric motor, and an oil separation container are combined into a T-shaped or inverted L-shaped structure, and has a relatively low center of gravity and is horizontally balanced as a structure. Since the load is large, it is possible to reduce vibration and reduce noise by arranging the vibration damping material only in the lower part of the united structure.

Here, in the case of a structure in which the center of gravity becomes higher or becomes higher in the vertical direction, there is a possibility that vibration cannot be sufficiently suppressed only by the lower portion or the bottom portion.

A technique for suppressing vibration isolation of a compressor having a structure in which a balanced load is dispersed in a higher center of gravity or a vertical method is desired.

In order to solve the above-mentioned subject, the composition described in a claim is applied, for example. That a compressor body having a rotor, a motor for driving the compressor main body, a compressor and a gas-liquid separator for separating gas and liquid from the compressed gas, wherein the compressor Body exhales, the rotor And a shaft of the electric motor are arranged in the vertical direction, and the electric motor, the compressor body and the gas-liquid separator are arranged in this order in the vertical direction from above, and a compressor unit below the gas-liquid separator. A first anti-vibration material that is disposed between the lower support and the lower support to support the compressor, and a second vibration isolation material that is disposed between the upper side of the electric motor and the upper support to support the compressor unit. possess the anti-vibration member, said lower support is a base for mounting the compressor unit, the upper support is supported by the plurality of frames extending in the vertical direction from said base, said motor Is a panel arranged in the horizontal direction above, the bracket above the electric motor has a plurality of extending portions extending in the vertical direction, the panel, a plurality of arm portions extending toward the extending portion. The second vibration isolator is arranged between the tip of the arm portion and the side surface of the extending portion .

According to the present invention, in the compressor unit in which the axial direction is the vertical direction, and the electric motor, the compressor body, and the gas-liquid separator are arranged from above, a vibration damping material is provided above and below the compressor unit and connected to the support. Thereby, the vibration propagating from the compressor unit to the support can be reduced, and the vibration and noise of the compressor can be suppressed.
Other problems, configurations, operations and effects of the present invention will be apparent from the following description.

It is a fragmentary sectional view at the time of observing the package type oil-cooled compressor concerning the example of the present invention from the side. It is a fragmentary sectional view at the time of observing the package type oil cooling type compressor concerning the example of the present invention from the front. It is a schematic diagram which shows the structure of a soundproof cover and the bracket vicinity of an electric motor at the time of observing the package type oil-cooled compressor which concerns on the Example of this invention from the upper side or the front. It is a schematic diagram which shows the structure of a package type oil-cooled compressor when the A-A' cross section of FIG. 1 is observed from the upper part. It is a fragmentary sectional view at the time of observing the package type oil cooling type compressor by other examples from the side.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. In addition, in each drawing, the same or corresponding members are denoted by the same reference numerals, and redundant description will be appropriately omitted.

FIG. 1 is a side view schematically showing the configuration of a package type oil-cooled air compressor 200 (hereinafter, may be simply referred to as “compressor 200”) according to an embodiment to which the present invention is applied. FIG. 2 is a diagram schematically showing the configuration of the compressor 200 from the front. For the sake of convenience, FIG. 1 shows only a part of the frame 61 and parts of the soundproof covers 63 and 64 in a cross section of the compressor package part, and FIG. 2 shows a cross section of the compressor package part and the compressor unit 100. To do. Further, in FIG. 2, the tooth shapes of the screw rotors 13A and 13B are drawn.

In this embodiment, an oil-cooled compressor that supplies lubricating oil to the compression working chamber to compress the air is taken as an example, but the present invention is, for example, a liquid-cooled gas that supplies other lubricating liquid such as water. It can also be applied to a compressor. Also, the gas to be compressed is not limited to air.

The package compressor 200 has a compressor package portion as a housing, and the compressor package portion is provided with a base 60 as a pedestal, and is connected to a frame 61 extending vertically from each corner of the base 60. The compressor package portion is provided with soundproof covers 62, 63, 64 made of metal panels or the like across each frame 61, and constitutes the front, left and right side surfaces, the back surface and the top surface of the compressor 200. The compressor unit 100 is supported by the base 60 on the lower side via a later-described first vibration- proof material 71, and on the soundproof cover 62 constituting the upper surface via the second vibration-proof material 72 on the upper side. It is designed to be stored inside the compressor package part.

The compressor unit 100 includes an electric motor 20, a compressor body 10, and a gas-liquid separator 30 in a vertical direction from above. The outer shells and casings of these parts are integrally connected by bolting or welding. As a result, the compressor unit 100 has a configuration that extends in the height direction rather than the width direction. In the present embodiment, the structure in which the electric motor 20, the compressor body 10 and the gas-liquid separator 30 are separable is taken as an example, but the present invention is not limited to this, and a part or all of the respective outer shells or casings. However, it may be a continuous, integrally-molded structure.

The compressor body 10 includes a twin screw rotor including a male rotor 13A and a female rotor 13B that mesh with each other. The male and female rotors 13A and 13B are arranged with the vertical direction as the axial direction. Both ends of the rotor shafts of the male and female rotors 13A and 13B are supported by bearings 15A, 15B, 16A and 16C. Further, the compressor body 10 is provided with a suction side casing 12 having a flange-like function for connecting to the casing 11 and the casing of the electric motor 20, and the male and female rotors 13A and 13 and respective bearings are housed therein. It has become.

The electric motor 20 is arranged such that the axial direction is the vertical direction, and the shaft 22 and the shaft portion of the male rotor 13A are directly connected. The electric motor 20 receives power supply and functions as a drive source for the compressor body 10. In this embodiment, a radial type magnet motor is applied, but an axial gap type or an induction motor may be used.

The gas-liquid separator 30 has a substantially cylindrical main body 31 and a substantially cup-shaped oil casing 38 connected to the lower opening of the main body 31. The main body portion 31 has a swirl flow passage 32 on the inner peripheral side of the compressor main body 10. The swirl flow path 32 has a shape along the inner circumference of the main body portion 31, and the compressed mixed air discharged from the compressor main body 10 is swirl-separated so that oil and compressed air are separated. There is. The separated oil is stored in an oil reservoir 39 inside the oil casing 38, and is collected outside the gas-liquid separator 30 by, for example, an oil recovery mechanism (not shown). On the other hand, the separated compressed air circulates to the outside of the compressor unit 100 from the lower opening of the inner cylinder arranged further inside than the inner circumference of the main body 31 and reaches the user side via various filters, coolers, and the like. It is being supplied.

The following vibrations occur in the compressor 200 having the above configuration.
The compressor 200 compresses air by meshing between the male rotor 13A and the female rotor 13B, and pressure pulsation occurs in the air in the middle of this compression, whereby the male rotor 13A and the female rotor 13B are vibrated. Further, since the male rotor 13A and the female rotor 13B have an unbalanced amount which is a rotational unbalanced amount, the unbalanced force is generated and vibrated by the rotation. When the rotor is vibrated, the vibration of the rotor causes the outer portion of the compressor body 10 such as the casing 11 to vibrate in the plane through the bearing. Further, this vibration may be propagated to the base 60, which is the support of the compressor unit 100, the frame 61, and the soundproof covers 62, 63, and 64, and the noise value of the vibration propagating portion may increase.

When the rotor is vibrated in the above vibration mode, the vibration of the rotor acts as an exciting force to vibrate the compressor unit 100 in the rigid body mode, and in particular, the lower part of the compressor unit 100 is used as a fulcrum and the upper part is When vibrating in the horizontal direction (X direction, Y direction), a device (not shown) connected to the compressor unit 100 may be vibrated to increase the vibration value and noise value of the entire compressor 200. is there.

With respect to such vibration, the present embodiment is characterized in that the first vibration isolator 71 and the second vibration isolator 72 are arranged above and below the compressor unit 100.

FIG. 3A shows a horizontal cross section of the soundproof cover 64 and the bracket 25 of the electric motor 20 when viewed from above. The bracket 25 has a plurality of (four in this embodiment) stays 75 on the upper surface side. The stay 75 is made of, for example, an L-shaped metal plate member, and is configured such that one surface is fixed to the bracket 25 by welding, bolting, or the like, and the other surface extends upward or vertically upward. The stays 75 are arranged at four equal angles around the axis of the electric motor 20. The stay 75 may be integrally molded with the bracket 25. Soundproof cover 64 has an arm portion 65 that extends horizontally towards the four sides respectively pressurized et nearest the stay 75.

FIG. 3B shows an enlarged view around the soundproof cover 64 and the bracket 25 when observed from the side. The tip of each arm 65 in the extending direction is bent in the vertical direction and is connected to the vertically extending surface of the stay 75 via the second vibration isolator 72.

The second vibration isolator 72 is made of an elastic body and is arranged from the vicinity of the center of the stay 75 in the extending direction to the tip side. In the present embodiment, rubber is applied as the second vibration isolator 72, but the present invention is not limited to this, and various springs, polymers, or other members having a damper action may be applied. The second vibration isolator 72 has a cylindrical shape and is sandwiched between the arm portion 65 and the stay 75 in a direction in which the height direction (extending direction of the cylinder) is horizontal. In particular, one of the features of this embodiment is that the height dimension is large (the diameter dimension is small) with respect to the aspect ratio (height dimension/diameter dimension) of the second vibration damping material 72 having a cylindrical shape. The height direction of the next rigidity small relatively second vibration-proof material 72 by diameter becomes small, the generated horizontal Direction of the compressor unit 100 vibration Ingredient propagating to the mating member second proof The vibration material 72 can absorb and insulate more. Further, it is possible to suppress the vibration of the compressor unit by setting the rigidity of the second vibration isolator 72 in the vibration isolating direction to a certain value and providing the rigidity to some extent.

In the present embodiment, since the compressor unit 100 has a vertically long structure in which the electric motor 20 having a relatively large mass is arranged above, the compressor unit 100 is supported on the upper side to stabilize the compressor unit 100. Can support. Since the second vibration isolator 72 is configured to easily absorb and insulate the horizontal vibration component, the propagation of vibration to the compressor unit 100 and the package portion is reduced.

FIG. 4 schematically shows a cross section of the compressor 200 as seen from above along the line AA′ shown in FIG. 1. A plurality of the first vibration damping materials 71 are arranged between the bottom surface of the oil casing 38 and the base 60. In this embodiment, four first vibration isolator 71 are arranged at an equal angle from the center of the bottom surface of the oil casing 38 in the radial direction. The first vibration- proof material 71 is made of rubber as an elastic body similarly to the second vibration- proof material 72, but a polymer or another member having a damper action can also be applied.

Four first vibration isolating member 71 has the same cylindrical shape as the second vibration-proof material 72, unlike the second vibration-proof material 72, toward the height direction (stretching direction of the tube) in the vertical direction Deploy. This is because the first vibration isolator 71 supports almost all the load of the compressor unit 100, and thus mainly absorbs and insulates the vibration component in the vertical direction.

As described above, according to this embodiment, the vibration isolating direction of the first vibration isolator 71 is the axial direction of the male rotor 13A, that is, the direction vertical to the ground (Z direction in FIGS. 1 and 2), and the second vibration isolator The vibration isolation direction of 72 is vertical to the axis of the male rotor 13A, that is, horizontal (with respect to the X and Y directions in FIGS. 1 and 2) with respect to the ground. It is possible to absorb and insulate with the vibration damping material according to the generated vibration in the direction, and it is possible to reduce the vibration of the compressor unit 100 and the compressor 200 propagating from now on.

Further, in the present embodiment, since the vibration isolator is arranged in the electric motor 20 and the gas-liquid separator 30 whose vibration value tends to be lower than that of the compressor body 10, the vibration propagation to the support is greatly reduced. effective.

Although the embodiments of the present invention have been described above, the present invention is not limited to the various examples described above, and other configurations can be applied without departing from the spirit of the present invention.

For example, although an example in which a cylindrical rubber member is applied as the first vibration isolator 71 and the second vibration isolator 72 has been described, for example, one or both of the vibration isolator is a sphere or a cone (a truncated cone is It may be configured to have a three-dimensional shape or the like, or a combination thereof, and to have a vibration isolation direction in three axis directions of a horizontal direction (X axis, Y axis) and a vertical direction (Z axis).

Further, in the present embodiment, the first vibration- proof material 71 and the second vibration- proof material 72 are made of rubber and have the same shape and size, but the same number is arranged. However, the shapes, sizes, and the numbers of installation are different. It may be. For example, the size and the number may be changed according to the relationship with the horizontal center of gravity position of the compressor unit 100, or the position to be arranged in the horizontal direction may be changed. As an example, a vibration isolator having a large size may be arranged on the upper surface of the bracket 25 or the bottom of the oil reservoir 39 on the side closer to the center of gravity in the horizontal direction, or the number of arrangements may be increased.

Further, in the present embodiment, the soundproof cover 64 and its arm portion 65, which form a part of the package portion, are used as the support of the compressor unit 100, but the arm portion 65 may extend from the frame 61. Good.

Further, for example, as shown in FIG. 5, the fan device 80 and the fan cover portion 81 that covers the fan device 80 are disposed above the soundproof cover 64, and the fan device 80 and the fan cover portion 81 are disposed on the upper surface of the soundproof cover 64 so as to overlap with the projection surface of the compressor unit 100. A configuration may be used in which a wind hole 82 is provided. In this case, the soundproof cover 64 not only serves as a support for the compressor unit 100, but also has a function of directing cooling air from below to above.

10... Compressor body, 11... Casing, 12... Suction side casing, 13A... Male rotor, 13B... Female rotor, 15A... Suction side bearing, 15B... Suction side bearing, 16A... Discharge side bearing, 16B... Discharge side Bearings, 20... Electric motors, 25... End brackets, 30... Gas-liquid separators, 31... Main body part, 32... Swirling flow paths, 38... Oil casings, 39... Oil sump parts, 60... Bases, 61... Frames, 62... 63, 64... Soundproof cover, 65... Arm portion, 71... First vibration damping material, 72... Second vibration damping material, 75... Stay, 80... Fan device, 81... Fan cover portion, 82... Hole portion, 100... Compressor unit, 200... Package type oil-cooled air compressor

Claims (11)

A compressor body having a rotor, a motor for driving the compressor main body, a compressor and a gas-liquid separator for separating gas and liquid from the compressed gas, wherein the compressor Body spit,
A shaft of the rotor and a shaft of the electric motor are arranged in a vertical direction, and a compressor unit in which the electric motor, the compressor body and the gas-liquid separator are arranged in the vertical direction from above,
A first vibration isolator that supports the compressor by being disposed between the lower portion of the gas-liquid separator and the lower support;
Possess the above said electric motor, and a second vibration isolating member disposed between the upper support for supporting the compressor unit,
The lower support is a base for mounting the compressor unit,
The upper support is a panel which is supported by a plurality of frames extending in the vertical direction from the base and which is arranged horizontally above the electric motor,
The bracket above the electric motor has a plurality of extending portions extending in the vertical direction,
The panel has a plurality of arm portions extending toward the extending portion,
The compressor in which the second vibration isolator is disposed between the tip of the arm portion and the side surface of the extending portion . The compressor according to claim 1, wherein
The first vibration isolator has a vertical vibration isolation direction,
A compressor in which the second vibration isolator has a horizontal vibration isolation direction. The compressor according to claim 1, wherein
A compressor in which an upper bracket of the electric motor is supported by the upper support via the second vibration isolator. The compressor according to claim 1, wherein
A compressor in which a bottom surface of the gas-liquid separator is connected to the lower support through the first vibration isolator. The compressor according to claim 1, wherein
A compressor in which the first vibration isolator and the second vibration isolator are elastic bodies made of any member of rubber, spring, or polymer. The compressor according to claim 1, wherein
At least one of the first vibration isolator and the second vibration isolator has a columnar shape, and a radial dimension thereof is smaller than a height dimension thereof. The compressor according to claim 1, wherein
A compressor in which at least one of the first vibration isolator and the second vibration isolator has a shape of a sphere, a cone, or a frustum. The compressor according to claim 1, wherein
A compressor in which the rotor is a screw rotor. The compressor according to claim 8,
A compressor having a plurality of the screw rotors and including at least one male rotor and one female rotor. The compressor according to claim 1, wherein
The compressor unit,
A compressor in which the casing of the electric motor, the casing of the compressor body, and the outer shell of the gas-liquid separator are integrally connected. The compressor according to claim 1, wherein
A compressor in which the compressor unit has a vertical height greater than a horizontal width.

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