JP6655521B2 - Liquid-cooled gas compressor - Google Patents

Description

  The present invention relates to a liquid-cooled gas compressor, and more particularly, to a liquid-cooled gas compressor having an anti-vibration structure.

  BACKGROUND ART A liquid-cooled gas compressor that supplies a liquid such as oil or water to a compression working chamber and compresses gas including air is known. In the case of a rotary liquid-cooled gas compressor, vibrations due to rotation of a compression mechanism (such as a rotor), vibrations due to pressure pulsation, and vibrations of a drive source for driving power to the rotation mechanism are generated. There is a problem such as noise caused by propagation of vibration to auxiliary equipment such as a base, a frame, a package panel, a cooler and a control board.

  Patent Literature 1 discloses a rotary compressor that is installed vertically so that a rotation axis of a motor extends along a vertical direction, and has a weight connected at one end to an airtight container housing the rotary compressor via an elastic member. And a configuration in which the vibration reduction device including the elastic body and the weight is disposed above the center of gravity of the rotary compressor. The configuration of Patent Literature 1 is configured such that the vibration reduction device absorbs vibration and suppresses occurrence of resonance with respect to resonance caused by the refrigerant pipe connected to the closed container, the weight of the compressor, the structure of the closed container, and the like. Has become. In other words, the configuration of Patent Document 1 is a technology for reducing vibration in a vertical integrated structure of a compressor and a motor. In particular, when the size of the apparatus becomes large in the vertical direction, the swing in the horizontal direction tends to increase. On the other hand, Patent Document 1 discloses a configuration in which a low-vibration device is installed above the center of gravity of the device to reduce the vibration of the refrigeration compressor.

JP 2015-203306 A

  The low-vibration device disclosed in Patent Document 1 needs to be disposed at any place outside the hermetic container that houses the compressor in order to exhibit the function of a refrigerating compressor and its vibration absorbing function. That is, there is a problem that the arrangement of the low-vibration device must be ensured in the configuration of the entire device.

  Further, when the low vibration device of Patent Document 1 is applied to a large compressor having a relatively large size and a large mass, in order to realize the function, it is necessary to have a larger size and a large mass. It cannot be said that it is a configuration. In particular, it can be said that the configuration in which the weight having a large mass is supported only by the elastic body has a problem in durability.

  Furthermore, the low-vibration device of Patent Literature 1 acts only on vibration absorption (or cancellation) of the compressor, and does not have a support function of the compressor itself.

  There is a need for a technique that more suitably suppresses compressor vibration including horizontal vibration without being restricted by the various problems described above.

  In order to solve the above-described problems, for example, a configuration described in the claims is applied. That is, a compressor main body that compresses gas, a motor that drives the compressor main body, and a gas-liquid separator that separates liquid and gas from compressed gas discharged from the compressor main body, A liquid-cooled gas compressor including a compressor unit in which the compressor body and the gas-liquid separator are integrally and vertically arranged, wherein the motor has a rigidity with respect to a horizontal vibration component of the compressor unit. The first elastic body is provided on the upper surface, and is connected to a support that supports the compressor unit via the first elastic body.

  As another configuration, a compressor body for compressing gas, an electric motor for driving the compressor body, and a gas-liquid separator for separating liquid and gas from compressed gas discharged from the compressor body, A liquid-cooled gas compressor including a compressor unit in which the compressor main body and an electric motor are integrally disposed above the gas-liquid separator, wherein the compressor main body or the electric motor is disposed in a horizontal direction of the compressor unit. A first elastic body having rigidity to a vibration component is provided on an upper surface, and the first elastic body is connected to a support supporting the compressor unit via the first elastic body.

ADVANTAGE OF THE INVENTION According to this invention, in the liquid-cooled compressor which has a compressor unit as an integral structure, there exists an effect which saves space of a compressor unit, suppressing a horizontal vibration component sufficiently. Further, according to the present invention, the effect of stabilizing the installation of the compressor unit as an integrated structure can be obtained.
Other problems, configurations, functions, and effects of the present invention will become more apparent from the following description.

1A and 1B are a top view and a side view illustrating a configuration of a compressor unit according to a first embodiment to which the present invention is applied. FIG. 4 is a top view, a side view, and a vertical cross-sectional view schematically illustrating a configuration of a first vibration isolation unit according to Embodiments 1 and 2. FIG. 3 is a top view, a side view, and a vertical cross-sectional view schematically illustrating a configuration of a second vibration isolation unit according to Embodiments 1 and 2. FIG. 1 is a side view schematically illustrating a schematic configuration of an oil-cooled air compressor according to a first embodiment. It is a top view and a side view showing a configuration of a compressor unit according to a second embodiment to which the present invention is applied.

  Hereinafter, embodiments for implementing the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration of a compressor unit 100 stored in an oil-cooled air compressor 200 according to a first embodiment to which the present invention is applied. FIG. 1A is a front view of the compressor unit 100, and FIG. 1B is a top view of the compressor unit 100 (a view of the motor 3 on the side opposite to the output side bracket).

  The compressor unit 100 includes a compressor main body 1, a gas-liquid separator 2, and a motor 3. The compressor body 1 includes screw rotors (for example, male and female twin screw rotors) as a compression mechanism, and lubricating oil is supplied to a compression working chamber formed by meshing of these rotors and a compressor body casing. Compressed air is generated together with the air sucked from the air.

  The compressed air discharged from the compressor body is swirled and separated into oil and air by the lower gas-liquid separator 2, and the separated compressed air is passed through the exhaust passage inside the gas-liquid separator 2 to the user. Supplied to the side. The separated oil is stored in the lower part of the gas-liquid separator 2 and is returned to the compressor body 1 via an oil cooler (not shown) via an oil recovery flow path (not shown).

  The motor 3 is composed of a radial or axial induction motor or magnet motor, and has a motor shaft arranged in a vertical direction, and is directly connected to a screw rotor (for example, a male rotor) in which the shaft is also arranged in a vertical direction. Is supplied. The present invention is not limited to the configuration in which the motor and the shaft of the rotor are directly connected.

  The compressor unit 100 is integrally configured from the top in the order of the electric motor 3, the compressor main body 1, and the gas-liquid separator 2, and in the present embodiment, a vertically long portion in which the height in the vertical direction is larger than the width in the horizontal direction. Is one of the features. Here, the term “integrally” refers to a case where part or all of the casing constituting the outer shell of each part is formed by integral molding, or the casing of each part is a divided structure, and these are connected by bolts or welding. Shall be included. With such a configuration, it can be said that the compressor unit 100 configures one structural body as a structural part.

  In this embodiment, an oil-cooled screw compressor is applied.However, the present invention is not limited to this, and uses another liquid such as water instead of oil. Is also good. Further, the rotor type is not limited to the screw, but may be another rotary compressor body, and the number of screw rotors is not limited to two.

  The compressor unit 100 is connected to the base 4 and the upper support 5 via the first vibration isolating unit 7 and the second vibration isolating unit 6 at two locations above and below the bottom surface of the gas-liquid separator 2 and the upper surface of the motor 3 respectively. It has become supported. The plurality of second vibration isolation units 6 are arranged on the bottom surface of the gas-liquid separator 2. In the present embodiment, the second vibration isolators are arranged at equal intervals on the outer peripheral side of the substantially circular bottom surface, but the present invention is not limited to this.

  As shown in FIG. 1B, the upper surface of the motor 3 (for example, the surface of the non-output side bracket) is connected to the upper support 5 via the first vibration isolating unit 7 at one center. Has become. More specifically, one end of the first vibration isolator 7 is connected to the upper surface of the motor 3, and the other end is connected to the upper support 5. In this embodiment, the installation position of the first vibration isolating unit 7 is set at the center of the upper surface of the motor 3, but is not limited to this, and the position of the intersection with the vertical extension line from the center of gravity of the compressor unit 100. It may be.

FIG. 2 shows a configuration of the first vibration isolation unit 7. FIG. 2A is a top view of the first vibration isolation unit 7, and FIG. 2B is a side view. FIG. 2C shows a longitudinal section taken along line PP ′ of FIG. 2A.
The first vibration isolation unit 7 includes a first elastic body 7a, a cup-shaped stay 7b, and a base stay 7c. The first elastic body 7a is made of rubber, polymer, or the like. The first elastic body 7a has a ring shape from the up-down direction and an annular shape whose vertical vertical cross section is substantially a letter "C" or a skirt shape.

The cup-shaped stay 7b is made of metal or the like, and is not limited to a material having a hardness higher than the hardness of the first elastic body 7a. The cup-type stay 7b has a cup-shaped inner periphery along the upper slope 7d of the first elastic body 7a, and is connected to the same. The cup-shaped stay 7b has a connection hole 7g that is connected to the support 5 by a bolt or the like.
The base stay 7c has a protruding portion 7f whose central portion projects annularly inclining vertically upward. The protrusion 7f has a shape along the lower slope 7e of the first elastic body, and is connected to this. The base stay 7c is fixed to the upper surface of the motor 3 by bolts or the like.

  The first elastic body 7a has effective rigidity in the XY direction (horizontal direction) and the Z direction (vertical direction) from its shape. That is, if the first elastic body 7a has a particularly effective rigidity in the vertical direction when it has a simple cylindrical shape, the rigidity direction is inclined by approximately 45 degrees as in the present embodiment, so that the effective rigidity in the horizontal direction is increased. Can also be obtained. For example, if the inclination of the first elastic body 7a is set to 45 degrees from the vertical direction or the horizontal direction, the first elastic body 7a has a characteristic that the spring constants (rigidity) in the XYZ directions are almost the same. The first elastic body 7a has a variable spring constant in the XYZ directions according to the inclination.

  Next, FIG. 3 shows a configuration of the second vibration isolation unit 6. FIG. 3A is a top view of the second vibration isolation unit 6, and FIG. 3B is a side view. FIG. 3C shows a longitudinal section taken along line QQ ′ in FIG. The second vibration isolating unit 6 includes a second elastic body 6a and upper and lower support stays 6b.

  The second elastic body 6a has a columnar shape (a column or the like) and is made of rubber, a polymer, a spring (a helical spring), or the like. The second elastic body 6a mainly has rigidity in the vertical direction. The main role of the second elastic body 6a is to prevent the vibration of the compressor unit 100 from being transmitted to the common base 4, and the eigenvalue calculation result determined from the weight of the compressor unit 100 and the number of the second elastic bodies 6a is: The rotation frequency is set to be sufficiently lower than the rotation frequency of the motor 3 or the like.

  Finally, FIG. 4 shows the overall configuration of the oil-cooled air compressor 200. The oil-cooled air compressor 200 is a so-called package-type compressor including a base 4, a frame 10 as a support pillar extending vertically from four corners thereof, a base 4 and a panel 11 which forms a housing outline over the frame 4. Constitute. The compressor unit 100 is stored in this package. The upper support 5 is supported by the frame 11 and functions as an internal partition panel together with the upper support function of the compressor unit 100. In this embodiment, the deflecting panel may also serve as a deflecting panel for guiding the cooling air from the intake opening 12 arranged below the panel to the fan device 13 arranged above by passing through the side peripheral surface of the compressor unit 100. Function. For this reason, the upper support 5 has a hole 14 for cooling air flow. When the upper support 5 is not used as a deflection panel, the upper support 5 may be configured as a plate or rod-shaped arm extending from the four frames 4 or the like. The above is the first embodiment.

  As described above, according to the first embodiment, the first vibration isolating unit 7 having rigidity in the XYZ directions is arranged at the upper part of the compressor unit, and the second vibration isolating unit 6 having rigidity particularly in the Z direction is arranged at the lower part. With this arrangement, it is possible to sufficiently suppress the vibration reduction of the horizontal vibration component that increases in the vertical direction and the vibration reduction of the vertical vibration component that increases in the vertical direction without securing an extra arrangement space.

  In addition, since the first anti-vibration unit 7 is formed of an annular body, the first anti-vibration unit 7 exerts an anti-vibration effect with respect to all of the vibrations that can occur in the horizontal direction of 360 °. It can be said that this is an efficient anti-vibration mechanism.

  Further, the first vibration isolation unit 7 is arranged at the top of the compressor unit 100. In other words, the position where the first vibration isolation unit 7 is arranged is a position where the horizontal vibration component of the compressor unit 100 can be opposed with the smallest stress. For this reason, one first vibration isolation unit 7 can exhibit the rigidity to the horizontal vibration most effectively, and even if the compressor unit 100 is enlarged (increased in mass), a sufficient effect can be expected. . It is also advantageous in terms of the number of parts.

  Although the first embodiment has been described above, the present invention is not limited to the above various examples. For example, the first anti-vibration unit 7 has a configuration in which the first elastic body 7a is sandwiched between the cup-type stay 7b and the base stay 7c, but the cup-type stay 7b and the base stay 7c are respectively connected to the upper support 5 and the electric motor. 3 as a part of the bracket, and the first elastic body 7a may be sandwiched between them.

  Further, although the first elastic body 7a is an annular body, an effect can be expected even if the annular body is a divided configuration and each of the pieces is separated at equal intervals. Similarly, when the first elastic body 7a is divided, an effect can be expected by applying a spring (such as a helical spring) instead of rubber or a polymer.

  In the first embodiment, particularly, the vertical configuration example in which the height of the compressor unit 100 is larger than the width is described. However, in the second embodiment, the compressor unit 100 is not particularly restricted by the width-to-height dimension ratio. An example in which the first vibration isolation unit is applied will be described. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description may be omitted.

  FIG. 5 shows a configuration of a compressor unit 300 according to the second embodiment. FIG. 5A is a top view, and FIG. 5B is a side view.

  The compressor unit 300 includes a compressor body 1, an electric motor 3, and a gas-liquid separator 2, and has a “T” shape or an inverted “L” shape in which these are integrally formed. More specifically, the compressor main body 1 and the electric motor 3 are arranged above the gas-liquid separator 2, and the compressor main body 1 and the electric motor 3 have their shafts arranged in a horizontal direction and are integrally connected side by side in this axial direction. Configuration. The shaft of the compressor main body 1 and the electric motor 3 will be described as a directly connected configuration, but is not limited to this, and may be configured to be connected via a gear and a gear case.

  In such a configuration, the compressor unit 300 has a larger upper mass in which the electric motor 3 and the compressor main body 1 are arranged than the lower gas-liquid separator 2. The connection between the compressor unit 300 and the base 4 uses the second vibration isolation unit 6. For the same reason as in the first embodiment.

Here, the motor 3 has a configuration in which the gas-liquid separator 2 has an overhang in the horizontal direction, and the horizontal center of gravity 8 is biased toward the motor 3 (black circles in the figure). The second embodiment is characterized in that the first vibration isolation unit 7 is disposed on the upper surface in the vertical direction of the horizontal center of gravity 8. That is, the first vibration isolating unit 7 is disposed on the compressor main body 1, the electric motor 3, or the upper surface between the two.
The first vibration isolating unit 7 is connected to the upper support 5 and the like as in the first embodiment.

  As described above, even in a configuration in which the dimensional ratio of the width and the height is not necessarily biased in the height direction as in the second embodiment, the first vibration isolation unit 7 sufficiently absorbs the vibration components in the XYZ directions. At the same time, the compressor unit 300 can be stably supported.

  DESCRIPTION OF SYMBOLS 1 ... Compressor main body, 2 ... Gas-liquid separator, 3 ... Motor, 4 ... Base, 5 ... Top support, 6 ... Second vibration isolating unit, 6a ... Second elastic body, 6b ... Support stay, 7 ... 1 Anti-vibration unit, 7a: first elastic body, 7b: cup-shaped stay, 7c: base stay, 7d: upper slope, 7e: lower slope, 7f: convex part, 8: center of gravity (horizontal direction), 10: frame , 11 panel, 12 intake opening, 13 fan unit, 14 hole

Claims (12)

A compressor body for compressing gas, a motor for driving the compressor body, a gas-liquid separator for separating liquid and gas from compressed gas discharged from the compressor body, and the motor, A liquid-cooled gas compressor including a compressor unit and a compressor unit in which the gas-liquid separator is integrally and vertically arranged,
The electric motor has a first elastic body having a rigidity with respect to a horizontal vibration component of the compressor unit on an upper surface, and is connected to a support that supports the compressor unit via the first elastic body. Oh it is,
The first elastic body is disposed on a vertical extension line of the center of gravity of the compressor unit on the upper surface of the electric motor, and has a uniform rigidity with respect to a horizontal vibration component and a vertical vibration component of the compressor unit. And
The liquid-cooling device, wherein the gas-liquid separator has a second elastic body having rigidity with respect to a vertical vibration component at a bottom portion, and is connected to a base on which the compressor unit is arranged via the second elastic body. Gas compressor. The liquid-cooled gas compressor according to claim 1,
A liquid-cooled gas compressor, wherein the first elastic body is a divided annular body in which a plurality of pieces are separated at equal intervals. A liquid-cooled gas compressor according to claim 2 ,
A liquid-cooled gas compressor, wherein each of the plurality of pieces has rigidity with respect to a horizontal vibration component and a vertical vibration component. The liquid-cooled gas compressor according to any one of claims 1 to 3 , wherein
A liquid-cooled gas compressor, wherein the compressor unit includes only one first elastic body. The liquid-cooled gas compressor according to any one of claims 1 to 4 , wherein
A liquid-cooled gas compressor having a plurality of the second elastic bodies. A compressor main body for compressing gas, an electric motor for driving the compressor main body, a gas-liquid separator for separating liquid and gas from compressed gas discharged from the compressor main body, wherein the gas-liquid separator A liquid-cooled gas compressor including a compressor unit in which the compressor body and the electric motor are integrally arranged at an upper part,
The compressor body or the electric motor,
Has a first elastic body having a rigidity against horizontal vibration component of the compressor unit to the upper surface, through the first elastic member state, and are not connected to the support for supporting the compressor unit,
The first elastic body is disposed on a vertical extension of a center of gravity of the compressor unit on the upper surface of the compressor body or the electric motor, and a first vibration component is provided for a horizontal vibration component and a vertical vibration component of the compressor unit. It has the same rigidity,
The liquid-cooling device, wherein the gas-liquid separator has a second elastic body having rigidity with respect to a vertical vibration component at a bottom portion, and is connected to a base on which the compressor unit is arranged via the second elastic body. Gas compressor. A liquid-cooled gas compressor according to claim 6 ,
A liquid-cooled gas compressor, wherein the first elastic body is a divided annular body in which a plurality of pieces are separated at equal intervals. The liquid-cooled gas compressor according to claim 7 , wherein
A liquid-cooled gas compressor, wherein each of the plurality of pieces has rigidity with respect to a horizontal vibration component and a vertical vibration component. A liquid-cooled gas compressor according to any one of claims 6 to 8 , wherein
A liquid-cooled gas compressor, wherein the compressor unit includes only one first elastic body. The liquid-cooled gas compressor according to any one of claims 6 to 9 , wherein
A liquid-cooled gas compressor having a plurality of the second elastic bodies. A liquid-cooled gas compressor according to any one of claims 6 to 10 , wherein
A liquid-cooled gas compressor in which the compressor body and the electric motor are arranged so that their axes are in a horizontal direction, and are integrally formed side by side in the axial direction. A liquid-cooled gas compressor according to any one of claims 1 to 11 , wherein
A liquid-cooled gas compressor, wherein the compressor body includes at least one screw rotor.

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