JP2019044607A - Compression device - Google Patents

Abstract

To suppress vibration propagation from a compressor body to a tank during operation while reducing an installation area in a compression device that is constituted of the compressor body, an electric motor and the tank.SOLUTION: A compression device 1 includes: a first pedestal 7; a second pedestal 5 provided on the first pedestal; a compressor body 3 provided on the second pedestal; an electric motor 4 provided on the second pedestal and driving the compressor body; and a tank 6 connected to the compressor body. Components of the compression device are juxtaposed on the first pedestal in the order of the compressor body, the electric motor and the tank.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure of a compression device.

  Conventionally, in a compression device that compresses a fluid, for example, a compressor main body and an electric motor for driving the compressor main body are arranged on a tank, thereby reducing the installation area as a whole product and improving the portability. Are known.

  However, when the compressor main body generates a large vibration during operation, the vibration load is directly transmitted to the tank in the method in which the device is arranged on the tank. This vibration load may repeatedly cause stress in each part of the tank, which is a pressure vessel, and may cause a problem related to reliability such as leakage of internal fluid due to fatigue failure. In particular, the vibration is extremely large in the case of a reciprocating compressor, and the above problem is remarkable.

  On the other hand, for example, as disclosed in Patent Document 1, a configuration in which a compressor main body and an electric motor are arranged on a pedestal and a tank is arranged at an isolated position different from the compressor main body is known.

JP 2006-220123 A

  The configuration disclosed in Patent Document 1 greatly increases the installation area of the entire compression device depending on the location of the tank, and the compressor and the tank cannot be designed and managed as an integrated compression device. However, it is not considered that it is difficult to ensure reliability.

  The present invention has been made in view of the above points, and an object of the present invention is to reduce the installation area and reduce the installation area from a compressor main body to a tank during operation in a compression apparatus including a compressor main body, an electric motor, and a tank. It is to suppress vibration propagation.

  In view of the above-described background art, the present invention is, as an example, a first pedestal, a second pedestal provided on the first pedestal, a compressor main body provided on the second pedestal, and a second A compression device comprising a motor provided on a pedestal for driving a compressor main body and a tank connected to the compressor main body, wherein the component of the compression device is a compressor main body on the first pedestal, The electric motor and the tank are arranged side by side in this order.

  ADVANTAGE OF THE INVENTION According to this invention, in the compression apparatus which consists of a compressor main body, an electric motor, and a tank, it becomes possible to suppress the vibration propagation to the tank from the compressor main body at the time of operation, reducing an installation area.

1 is a schematic configuration diagram of a compression device in Embodiment 1. FIG. 1 is an internal configuration diagram of a compressor body in Embodiment 1. FIG. It is a schematic block diagram of the compression apparatus in Example 2. FIG. 6 is a schematic configuration diagram of a compression device according to a third embodiment. It is another schematic block diagram of the compression apparatus in Example 3. FIG. 10 is still another schematic configuration diagram of a compression device according to Embodiment 3. FIG. 10 is a schematic configuration diagram of a compression device according to a fourth embodiment. It is the block diagram which looked at the 1st base in Example 5 from the back surface. FIG. 10 is a schematic configuration diagram of a compressor unit according to a sixth embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a compression device 1 in the present embodiment. In FIG. 1, a compressor 1 includes a compressor main body 3, an electric motor 4 that drives the compressor, a second pedestal 5 in which the compressor main body 3 and the electric motor 4 are arranged at the upper part, and a first pedestal in which these are arranged at the upper part. 7 and a tank 6 disposed on the first pedestal 7. Among these, the compressor unit 2 is a structure including the compressor body 3, the electric motor 4, and the second pedestal 5.

  The discharge port of the compressor body 3 is connected to the tank 6 via a discharge pipe 8. The compressor body 3 compresses a fluid, and in this embodiment, a reciprocating compressor will be described.

  FIG. 2 is an internal configuration diagram of the compressor body 3. In FIG. 2, the compressor body 3 rotates to the center of the crank chamber 31, one cylinder 32 protruding from the crank chamber 31 in the vertical direction, a cylinder head 33 that closes the upper portion of the cylinder 32, and the center of the crank chamber 31. And a crankshaft 34 supported in a possible manner. When the crankshaft 34 in the crank chamber 31 rotates, the compressor body 3 reciprocates in the vertical direction in the piston 32, and as a result, sucks and compresses fluid from the outside of the cylinder. Discharge.

  In FIG. 1 and FIG. 2, for simplicity of explanation, the shape of the compressor body is a one-cylinder one-stage compressor having only one pair of piston 35 and cylinder 32. A compressor having a plurality of pistons 35 and cylinders 32 radially may be used.

  The compressor body 3 is fixed to the upper surface of the second pedestal 5 with the crankshaft 34 disposed in parallel with the rotating shaft of the electric motor 4. The compressor pulley 36 is attached to the crankshaft 34, and the electric motor is attached to the electric motor shaft. A pulley 37 is fixed. The compressor pulley 36 attached to the compressor main body 3 has blades, and the cooling air is generated toward the compressor main body 3 along with the rotation of the compressor pulley 36 to promote heat dissipation of the compressor main body 3.

  A power transmission belt 38 for power transmission is wound around the compressor pulley 36 and the motor pulley 37. Thereby, according to rotation of the electric motor 4, the crankshaft 34 of the compressor main body 3 is rotationally driven through the electric motor pulley 37, the transmission belt 38, and the compressor pulley 36, and the compressor main body 3 compresses the fluid.

  Here, since the compressor main body 3 compresses the fluid by the vertical movement of the piston 35, in principle, the compressor body 3 generates vibration. This vibration vibrates the second pedestal 5 through the compressor body 3 and the bolts that fix the compressor body 3. The energy of this vibration increases as the capacity of the compressor, the output of the motor, the pressure and flow rate of the fluid to be handled increase, and repeatedly applies loads to each part of the structure that fixes the compressor body, causing fatigue failure. It may cause malfunctions. In particular, in the case of a tank that is a pressure vessel, if a fatigue failure occurs, a serious accident may occur due to leakage of the internal fluid. For this reason, securing the strength reliability of the tank against the excitation force of the reciprocating compressor is a top priority for the compressor manufacturer.

  Therefore, in this embodiment, as shown in FIG. 1, the compressor body 3 and the electric motor 4 are arranged on the second pedestal 5, and the second pedestal 5 and the tank 6 are juxtaposed on the first pedestal 7. Provided. That is, the compressor body 3, the electric motor 4, and the tank 6 are juxtaposed on the first pedestal 7. Reference numeral 9 denotes a bolt, and the tank 6 is fixed to the first pedestal 7 by the bolt 9.

  In this way, the vibration propagation from the compressor body 3 to the tank 6 is suppressed by arranging the tank 6 apart from the second pedestal 5 on which the compressor body 3 and the electric motor 4 that are the excitation sources are mounted. In addition, strength reliability can be ensured.

  Further, by completing the compressor unit 2 on the second pedestal 5, the compressor unit 2 can be removed as a unit when changing to a tank specification with a different volume or when only the compressor unit 2 is replaced. This makes it possible to facilitate individual maintenance and maintenance work.

  In order to improve workability at this time, if the second pedestal 5 is provided with a hole 10 through which a forklift claw can be inserted or a crane rope can be passed, the portability can be further improved. .

  In addition, in the present embodiment, the compressor unit 2 and the tank 6 are integrated by the first pedestal 7, thereby improving the portability of the product as a whole, and the integrated design management of the compressor body 3 and the tank 6 is performed. This has the advantage that it can be made easier and legal compliance can be facilitated.

  Therefore, according to the present embodiment, in the compression device including the compressor main body, the electric motor, and the tank, it is possible to suppress vibration propagation from the compressor main body to the tank during operation while reducing the installation area.

  In the present embodiment, in addition to the first embodiment, a configuration capable of simultaneously ensuring the strength reliability of the discharge pipe 8 connecting the compressor body 3 and the tank 6 will be described. FIG. 3 is a schematic configuration diagram of the compression device in the present embodiment.

  In the configuration in the first embodiment, the discharge pipe 8 directly connects the compressor body 3 and the tank 6. In this case, there is an advantage in that the discharge can be reduced by the amount of the simple structure, and the cost can be suppressed. However, on the other hand, there is a concern that the displacement difference may be discharged and concentrated on the piping 8 when the tank 6 that is set apart from the vibration of the compressor body 3 vibrates at a different phase. Such relative displacement at both ends of the pipe becomes a repeated load on the pipe fixing portion, which causes serious problems such as fatigue cracks and internal fluid leakage.

  Therefore, in this embodiment, as shown in FIG. 3, the relay joint 11 is provided on the second pedestal 5, and the compressor body 3 and the tank 6 are connected by the discharge pipes 8a and 8b.

  When configured in this manner, the relay joint 11 has a small vibration amplitude and a close vibration phase with respect to the vibration direction 26 of the compressor body 3, and therefore, the displacement difference between both ends of the discharge pipe 8a can be reduced. Strength reliability can be ensured. In addition, by connecting the relay joint 11 and the tank 6 with small vibration, not only can the displacement difference between the both ends of the discharge pipe 8b with respect to the vibration direction 25 of the tank 6 be reduced, but also to the tank 6. It is possible to further suppress the vibration propagation.

  In addition, the position where the relay joint 11 is provided at this time may be on the first pedestal 7 in addition to the second pedestal 5. However, when the second pedestal 5 is provided, the compressor unit 2 can be detached from the first pedestal 7 simply by removing the discharge pipe 8b from the tank 6, so that maintenance and maintenance workability can be facilitated. I can plan.

  In the present embodiment, in addition to the above-described embodiment, a description will be given of a configuration that can reduce the installation area of the entire product even when the compressor body 3 is a multi-cylinder reciprocating compressor having two or more cylinders.

  In the configuration of the second embodiment, when the compressor body 3 is, for example, a two-cylinder reciprocating compressor, there is a problem that the installation area of the entire product is greatly increased depending on the cylinder arrangement. For example, when the compressor main body 3 is a cylinder with two cylinders arranged horizontally, the distance between the compressor main body 3 and the electric motor 4 is sufficiently secured in consideration of disassembly workability when the cylinder on the electric motor 4 side is inspected and maintained. There is a need to. For this reason, the width dimension of the compressor unit 2 and the whole compression apparatus 1 will be expanded as a cylinder becomes long.

  Regarding the above problem, for example, when the pressure handled by the compressor body 3 is high or when a two-stage cylinder configuration is adopted for the cylinder on the motor 4 side in order to prevent leakage due to blow-by of the compressed fluid, the installation area The impact on the environment is even greater and more serious.

  FIG. 4 is a schematic configuration diagram of a compression device in the present embodiment. In this embodiment, as shown in FIG. 4, the compressor body 3 is a V-type two-cylinder reciprocating compressor having a phase angle of 90 degrees, for example, and the electric motor 4 is arranged in the space below the cylinder on the electric motor 4 side. . That is, the electric motor 4 is disposed at the lower part in the vertical direction of the cylinder closest to the electric motor 4 of the compressor body 3. With this configuration, the installation area can be reduced regardless of the cylinder length of the compressor body 3.

  FIG. 5 shows a schematic configuration diagram of another compression apparatus according to this embodiment. As shown in FIG. 5, when the compressor body 3 is a V-type two-cylinder reciprocating compressor and the multi-stage boosting type reciprocating compressor in which both side cylinders have a two-stage cylinder configuration, By arranging the cylinders so as to face the electric motor side, the installation area can be similarly reduced.

  Further, as shown in FIG. 6, even when the compressor body 3 is a V-type two-cylinder reciprocating compressor and the one-side cylinder has a two-stage cylinder configuration, as in the case of FIG. It is possible to reduce the installation area in the same manner by arranging so as to face the motor side.

  In the present embodiment, in addition to the above-described embodiment, for example, when the compressor body 3 is a booster compressor that sucks compressed fluid and further boosts and discharges the compressed fluid, the suction flow path control on the suction side of the compressor body 3 is performed. A configuration that can reduce the product installation area even when devices are arranged will be described. FIG. 7 is a schematic configuration diagram of the compression device 1 in the present embodiment. 7A is a side view, and FIG. 7B is a front view.

  When the compressor main body 3 is used as a booster compressor, in order to reduce the load at the start-up and to prevent deterioration of the purity and dew point of the suction fluid, the suction flow path is generally linked with the start / stop of the compressor. It is necessary to provide a suction flow path control device having a valve for switching. For this reason, in FIG. 7, a suction flow path control device 15 including a suction pipe 16 and a three-way valve (not shown), a pressure reducing valve, a solenoid valve, a filter, an orifice, and the like is connected to the suction port of the compressor body 3. Has been. In FIG. 7, the inlet of the suction flow path control device 15 also serves as a connection port for connecting a pipe for fluid sucked by the booster compressor when the compressor is installed at the customer.

  The suction flow path control device 15 can be arranged at any location of the compression device 1 depending on the shape of the suction pipe 16. Since the repeated load of the suction pipe 16 increases due to the vibration of the machine body 3, it is necessary to determine the arrangement location in consideration of the vibration state.

  Therefore, in this embodiment, as shown in FIG. 7, the suction flow path control device 15 is disposed on the second pedestal 5 on the opposite side of the electric motor 4 with respect to the compressor body 3. By arranging in this way, the relative displacement between the compressor body 3 and the suction flow path control device 15 can be suppressed, and the vibration load on the suction pipe 16 can be reduced. Further, even if the compressor body 3 is a two-cylinder reciprocating compressor, as shown in the figure, for example, a V-type two-cylinder reciprocating compressor having a phase angle of 90 degrees is used, and the lower part of the cylinder opposite to the electric motor 4 is used. Is provided with a suction flow path control device 15. That is, the suction flow path control device 15 is disposed at the lower part in the vertical direction of the cylinder closest to the suction flow path control device 15 of the compressor body 3. This makes it possible to reduce the product installation area.

  In consideration of the installation workability of the compressor 1, it is desirable that the pipe connection portion at the customer in the suction flow path control device 15 is directed to the front of the compressor. Further, the compressor main body 3 becomes high temperature around the discharge side of the cylinder head 33 by the compression heat generated by compressing the fluid during the operation. For this reason, in consideration of safety for customers, it is desirable to provide the discharge side of the cylinder head 33 on the compressor pulley side of the compressor body 3. For this reason, the suction pipe 16 connecting the suction flow path control device 15 and the compressor body 3 has a Z shape as shown in FIG. 7, thereby improving the productivity and assembly workability of the pipe itself. Thus, the suction flow path control device 15 can be arranged.

  By the way, the suction flow path control device 15 becomes difficult to assemble the component device and attach it to the second pedestal 5 depending on the device configuration and the size and angle of the cylinder of the compressor body 3. In this case, as shown in FIG. 7, the suction flow path control device 15 is fixed to the pedestal plate 23, and each component device is separately assembled so as to be fixed on the second pedestal 5 in a pre-assembled state. In addition, the maintenance and inspection workability can be improved.

  In this embodiment, a configuration capable of further reducing the vibration of the tank 6 in addition to the above embodiment will be described.

  In the embodiments described above, the tank 6 has been arranged to stand vertically on the first pedestal 7. Although such an installation method is very effective in terms of reducing the product installation area, the fixed state tends to be unstable because the position of the center of gravity of the tank 6 is high. Therefore, for example, when the vibration of the compressor body 3 propagates to the tank 6 through the second pedestal 5 and the first pedestal 7, the tank 6 is in contact with the first pedestal 7 as indicated by an arrow 25 in FIG. 3. A vibration that shakes the head may occur while deforming the vicinity of the joint. Such vibration becomes a repeated load on the fixed portion of the tank 6 and the discharge pipe 8b.

  As a countermeasure against this vibration, it is effective to increase the rigidity in the vicinity of the joint portion between the first pedestal 7 and the tank 6.

  FIG. 8 is a configuration diagram of the first pedestal 7 in this embodiment as viewed from the back side. As shown in FIG. 8, the first pedestal 7 for fixing the tank 6 is configured by a box shape formed by bending a steel plate with the installation surface open, and the tank 6 is attached to the back surface of the tank 6 on the back surface of the tank 6. Two reinforcing plates 7a and 7b are provided so as to cross and intersect the leg flange surface 6a. In FIG. 8, the two reinforcing plates 7a and 7b are shown as L-shaped steel plates. By comprising in this way, it becomes possible to comprise 1st base 7 itself cheaply, reducing the deformation | transformation of the 1st base 7 which causes the vibration which the tank 6 shakes a head.

  At this time, it is effective to arrange the bolt 9 for fixing the tank 6 on the first base 7 in the vicinity of the reinforcing plates 7a and 7b. For example, when the reinforcing plates 7a and 7b are L-shaped or U-shaped steel plates, a vibration reduction effect can be expected by providing the reinforcing plate so as to penetrate the contact surface of the first pedestal 7.

  In this embodiment, in addition to the above embodiment, a configuration capable of further reducing vibration and noise of the compressor body will be described.

  FIG. 9 is a schematic configuration diagram of a compressor unit in the present embodiment. 9A is a front view, FIG. 9B is a bottom view of the second pedestal 5 viewed from the bottom, and FIG. 9C is a side view of the second pedestal 5 viewed from the side.

  As shown in FIG. 9, the structure of the 2nd base 5 can be comprised cheaply by setting it as the structure which bent the steel plate into the U-shape. However, with a simple U-shaped steel plate, vibrations that cause the U-shaped cross section to deform as indicated by the dotted line in FIG. For this reason, rigidity is increased by adopting a configuration in which the reinforcing plates 5a and 5b are attached. The reinforcing plates 5a and 5b may be L-shaped steel plates. Further, regarding the arrangement of the reinforcing plates 5a and 5b, it is effective to match the center of gravity of the compressor body 3 and the electric motor 4 in order to suppress the vibration of the entire second pedestal. That is, the reinforcing plates 5a and 5b that cross the U-shape are provided at positions corresponding to the lower portion of the fixing portion of the compressor body 3 to the second pedestal 5 and the fixing portion of the electric motor 4 to the second pedestal 5.

  However, this alone causes the compressor body 3 to vibrate in the direction of rotation as indicated by the arrow 26 with the reinforcing plate 5a as a fulcrum. Further, noise radiated from the lower portion of the compressor body 3 during operation reverberates in the space 5d in the second pedestal, and is emitted from the open portion on the side surface, thereby deteriorating the operation sound of the compressor 1. There is a problem.

  Therefore, as shown in FIG. 9, a reinforcing plate 5 c that crosses the compressor body side end surface of the second pedestal is added, and 5 a, 5 b, and 5 c are fixed to the first pedestal 7. By comprising in this way, it becomes possible to reduce a vibration because the reinforcement board 5c resists the vibration of the direction which the compressor main body 3 rotates centering on the reinforcement board 5a. At the same time, it is possible to prevent the operating noise that has reverberated in the space 5d in the second pedestal from being radiated from the side surface of the second pedestal 5, thereby reducing the noise.

  Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. Moreover, it is not necessarily limited to what has all the structures demonstrated. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1: compression device, 2: compressor unit, 3: compressor body, 4: electric motor, 5: second pedestal, 5a, 5b, 5c: reinforcing plate, 5d: space in second pedestal, 6: tank, 6a : Leg flange surface, 7: first pedestal, 7a, 7b: reinforcing plate, 8, 8a, 8b: discharge pipe, 9: bolt, 10: hole, 11: relay joint, 15: suction flow path control device, 16 : Suction pipe, 23: base plate, 25: tank vibration direction, 26: compressor body vibration direction, 31: crank chamber, 32: cylinder, 33: cylinder head, 34: crankshaft, 35: piston, 36: compressor Pulley, 37: Electric motor pulley, 38: Transmission belt

Claims (9)

The first pedestal,
A second pedestal provided on the first pedestal;
A compressor body provided on the second pedestal;
An electric motor provided on the second pedestal for driving the compressor body;
A compression device comprising a tank connected to the compressor body,
The components of the compression device are juxtaposed in the order of the compressor body, the electric motor, and the tank on the first pedestal. The compression device according to claim 1,
The compressor main body is a reciprocating compressor. The compression device according to claim 1 or 2,
The compressor body is a multi-cylinder reciprocating compressor having two or more cylinders,
The said motor is arrange | positioned at the perpendicular direction lower part of the cylinder nearest to the said motor of the said compressor main body, The compression apparatus characterized by the above-mentioned. The compression device according to claim 3,
The compressor body is a V-type two-cylinder reciprocating compressor having two cylinders, and both cylinders have a two-stage cylinder configuration,
A compression device, wherein a cylinder on one side of the compressor body is arranged to face the electric motor side. The compression device according to claim 3,
The compressor body is a V-type two-cylinder reciprocating compressor having two cylinders, and one side cylinder has a two-stage cylinder configuration,
2. A compressor according to claim 1, wherein a cylinder having the two-stage cylinder configuration of the compressor body is disposed so as to face the electric motor side. The compression device according to any one of claims 1 to 5,
The compressor body and the tank are connected by piping,
The pipe is routed through a relay joint provided on the first pedestal or the second pedestal. The compression device according to any one of claims 1 to 6,
The compressor body is a booster compressor that sucks and pressurizes a temporarily compressed fluid,
The suction port of the compressor main body is provided with a suction flow path control device that switches the suction flow path of the compressor main body in conjunction with the operation and stop of the electric motor.
The compressor is characterized in that the suction flow path control device is arranged at a lower part in the vertical direction of the cylinder closest to the suction flow path control device of the compressor body. The compression device according to any one of claims 1 to 7,
The first pedestal has a box shape formed by bending a steel plate,
A compression device, wherein a reinforcing plate is provided on a back surface of a joint portion of the first pedestal with the tank so as to cross and intersect a position corresponding to a lower portion of the joint surface with the tank. The compression device according to any one of claims 1 to 7,
The second pedestal is a U-shaped shape formed by bending a steel plate,
The back surface of the second pedestal includes a position corresponding to a lower portion of the fixing portion of the compressor body to the second pedestal and a fixing portion of the electric motor to the second pedestal, and the compressor of the second pedestal. A compression apparatus comprising a reinforcing plate that crosses the U-shape on a side end surface of a main body.

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