JPH0893685A - Turbo-compressor - Google Patents

Abstract

PURPOSE: To provided a compacted turbo-compressor by devising the arrangement of respective components. CONSTITUTION: In a turbo-compressor having a rotary shaft 4 disposed parallel to an output shaft 2 of a drive motor 1 through a gear 3, a first stage compressor 5 and second stage compressor 6 connected to each other on both sides of the rotary shaft 4, the first stage compressor 5 is disposed on the drive motor 1 side and the second stage compressor is disposed on the opposite side, while an intake pipe 7 and intake filter 8 of the first stage compressor 5 are disposed in parallel on the side of the drive motor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbo compressor used as a power source or a process for a factory, and more particularly to a turbo compressor which is made compact by devising the arrangement of each constituent element.

[0002]

2. Description of the Related Art As an industrial turbo compressor, a two-stage turbo compressor is known in which a fluid compressed by a first stage compressor is further compressed by a second stage compressor and then discharged. In this turbo compressor, the impeller of the first stage compressor and the impeller of the second stage compressor are connected by a rotary shaft, and the rotary shaft is rotated by a drive motor via a gear device. Specifically, the rotary shaft is arranged in parallel with the output shaft of the drive motor, the gear of the gear device is meshed with the central portion thereof, and the impeller of the second stage compressor is attached to the end portion on the drive motor side. , The impeller of the first stage compressor is attached to the opposite end.

[0003]

However, when the first-stage compressor is located on the opposite side of the drive motor in this way, the first-stage compressor is
Since the suction pipe and the suction filter connected to the stage compressor protrude to the opposite side of the drive motor, the installation area of the turbo compressor must be increased.

An object of the present invention devised in view of the above circumstances is to provide a turbo compressor which is made compact by devising the arrangement of each constituent element.

[0005]

In order to achieve the above-mentioned object, the present invention has a structure in which a rotary shaft is arranged in parallel with an output shaft of a drive motor through a gear device, and a first stage compressor is provided on both sides of the rotary shaft. In the turbo compressor in which the second stage compressor is connected to the second stage compressor, the first stage compressor is arranged on the side of the drive motor, the second stage compressor is arranged on the opposite side, and the first stage is arranged on the side of the drive motor. It consists of a compressor suction pipe and a suction filter arranged in parallel.

Below the first-stage compressor, the second-stage compressor, and the gear unit, a box-like body having a substantially rectangular parallelepiped shape whose inside is partitioned into two cooling chambers is provided, and one of the cooling chambers has a first chamber. A heat exchanger for an intercooler that cools the fluid discharged from the second-stage compressor and guides it to the second-stage compressor is provided, and the fluid discharged from the second-stage compressor is cooled and exhausted in the other cooling chamber. A heat exchanger for the outer cooler may be installed.

The heat exchanger is formed in a slender shape along the longitudinal direction of the cooling chamber, and the heat exchanger is arranged at the center of the cooling chamber to divide the cooling chamber into an inlet chamber and an outlet chamber. An elongated inlet formed along the heat exchanger may be provided at one end in the longitudinal direction, and an outlet may be provided at the other end in the longitudinal direction of the outlet chamber.

[0008]

According to the structure, the first-stage compressor is arranged on the drive motor side, the second-stage compressor is arranged on the opposite side, and the suction pipe and the suction pipe of the first-stage compressor are arranged on the side of the drive motor. Since the suction filters are arranged in parallel, the suction pipe and the suction filter do not project, and the installation area of the entire turbo compressor is substantially quadrangular and compact.

According to the above construction, the heat exchanger for the intercooler and the heat exchanger for the outer cooler are connected to the first stage compressor,
Since the second-stage compressor and the gear device are housed in a substantially rectangular parallelepiped box body provided below the gear device, the overall structure of the turbo compressor including the cooling mechanism becomes compact.

According to the construction of (1), since the inlet which is elongated along the heat exchanger is provided at one end of the inlet chamber and the outlet is provided at the other end of the outlet chamber, the inlet flows into the inlet chamber. The fluid that has passed through the heat exchanger flows approximately evenly to the outlet chamber,
It is discharged from the discharge port. Therefore, the heat exchange rate is improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of the turbo compressor, FIG. 2 is a side view, and FIG. 3 is a front view. As shown in the figure, a rotary shaft 4 is arranged in parallel to an output shaft 2 of a drive motor 1 via a gear device 3, and a first stage compressor 5 is provided at an end of the rotary shaft 4 on the drive motor 1 side. The second stage compressor 6 is provided at the opposite end. The suction pipe 7 and the suction filter 8 of the first-stage compressor 5 are arranged in parallel to the side of the drive motor 1.

The drive motor 1 is a so-called flange motor which is attached to the gear case 9 of the gear device 3 via a flange 10. The output shaft 2 of the drive motor 1 is a joint portion to the gear shaft 11 of the gear device 3 shown in FIG. They are connected via 12 via bolts and nuts. The gear shaft 11 is rotatably supported by the gear case 9 via a bearing 13, and a large-diameter gear 14 is attached to an intermediate portion thereof. Large diameter gear 1
Reference numeral 4 is in mesh with a small diameter gear 15 provided on the rotary shaft 4. By the gear device 3, the rotation of the output shaft 2 of the drive motor 1 is accelerated and transmitted to the rotary shaft 4.

The rotary shaft 4 has a small-diameter gear 1 at the center thereof.
5 is provided, and the first-stage compressor 5 is provided at the end on the drive motor 1 side.
The impeller 16 of the second stage compressor 6 is provided at the opposite end thereof. The portion between the impellers 16 and 17 and the small diameter gear 15 is supported by the gear case 9 via the bearing 18. First
The impeller 16 of the stage compressor 5 is housed in a cylindrical recess 19 formed on the side portion of the gear case 9, and the second stage compressor 6
The impeller 17 is housed in a columnar recess 20 formed on the opposite side of the gear case 9. In these recesses 19 and 20, the swirl chambers 21 and 22 and the intake passage 2 are provided.
Blocks 25 and 26 having 3 and 24 are respectively inserted, and diffusers 27 and 28 are formed between the blocks 25 and 26 and the recesses 19 and 20, respectively.

The impeller 16 of the first stage compressor 5 draws in air from the intake passage 23 and accelerates it radially outward. The accelerated air is decelerated through the diffuser 27 and the swirl chamber 21, the speed is converted into pressure, and the air is guided to the intercooler 29 shown in FIG. The air cooled by the intercooler 29 is guided to the communication passage 30 to the second stage compressor 6. The communication passage 30 is formed in a spiral shape outside the spiral chamber 22 of the second stage compressor 6 as shown in FIG.
It is partitioned by covering the recess 20 with the lid member 31.

By arranging the communication passages 30 outside the spiral chamber 22 in this manner, the communication passages 30 are covered with the lid member 3.
It is prevented from protruding outside of 1. A current plate 32 is spirally arranged between the lid member 31 and the block 26. Therefore, the air in the communication passage 30 is
And is accelerated radially outward by the impeller 17 of the second-stage compressor 6 through the intake passage 24, the speed is converted into pressure through the diffuser 28 and the spiral chamber 22, and the pressure is guided to the outer cooler 33 shown in FIG. . Then, after being cooled by the outer cooler 33, it is finally exhausted.

The gear case 9 is vertically separable into a lid portion (not shown) and a case body in the horizontal cross section shown in FIG. And the lid part that was divided and removed is
It can be attached to the case body by screwing a bolt into the bolt hole 34. Therefore, the gear shaft 11, the large diameter gear 14, the small diameter gear 15, the rotary shaft 4 and the impellers 16 and 17 can be inspected by removing the lid portion. Further, the lid member 31 and the block 26 of the second stage compressor 6 and the block 25 of the first stage compressor 5 are
Each is removed by loosening the bolt 35.

Here, when the block 25 of the first-stage compressor 5 is removed, in order to enable the block 25 to be pulled out without removing the drive motor 1, the motor mounting formed on the gear case 9 as shown in FIG. A part of the flange 36 is cut into a crescent shape to form an escape portion 37. Further, the drive motor 1 itself is also provided with an escape portion 38 corresponding to the pull-out length of the block 25 as shown in FIG.

The intake passage 23 of the first-stage compressor 5 has a structure shown in FIG.
The suction pipe 7 and the suction filter 8 are connected as shown in FIG. The suction pipe 7 and the suction filter 8 are arranged parallel to the side of the drive motor 1. The suction pipe 7 is curved in an S shape when viewed from above, and is connected to the suction filter 8 via a flange 39. Inhalation filter 8
2 has a casing 40 formed in an inverted L-shape when viewed from the side as shown in FIG. 2, and has the function of removing dust and the like from the intake air and suppressing the intake sound. In FIG. 1, 41 is an intake port of the drive motor 1 and 42 is an exhaust port of the drive motor 1.

Below the first-stage compressor 5, the second-stage compressor 6 and the gear unit 3, as shown in FIG.
The box body 4 having a substantially rectangular parallelepiped shape divided into two cooling chambers 44 and 45 (intercooler 29 side and outer cooler 33 side) by
6 is provided integrally with the gear case 9 by casting. One cooling chamber 44 is provided with a heat exchanger 47 for the intercooler 29 that cools the air discharged from the first-stage compressor 5 and guides it to the second-stage compressor 6. The other cooling chamber 45 is provided with a heat exchanger 48 for the outer cooler 33 that cools and discharges the air discharged from the second stage compressor 6.

A box 46 having a substantially rectangular parallelepiped shape having these two cooling chambers 44 and 45 is integrally cast with the gear case 9 as shown in FIGS. 1 to 3, and the first stage compressor 5,
It also serves as a support base for the second-stage compressor 6, the gear device 3, the drive motor 1, and the suction filter 8. The box 46 is
It is formed in a size that matches the projected area of the compressor 5 and the like, which has a substantially rectangular shape when viewed from above.

As shown in FIG. 5, the heat exchangers 47 and 48 are elongated along the longitudinal direction of the cooling chambers 44 and 45, and are arranged in the central portions of the cooling chambers 44 and 45 to be cooled. , 45 are divided into an inlet chamber 49 and an outlet chamber 50, respectively. An inlet 51 formed in an elongated rectangular shape along the heat exchangers 47, 48 is provided at one end of the inlet chamber 49 in the longitudinal direction, and the other end of the outlet chamber 50 in the longitudinal direction is A discharge port 52 is provided. Intercooler 2
The swirl chamber 21 of the first stage compressor 5 and the communication passage 30 of the second stage compressor 6 are connected to the inlet 51 and the outlet 52 of the cooling chamber 44 on the 9th side, respectively. On the other hand, the outer cooler 33
The swirl chamber 22 and the discharge pipe 53 of the second stage compressor 6 are connected to the introduction port 51 and the discharge port 52 of the side cooling chamber 45, respectively.

FIG. 6 shows a plan view of the cooling chamber 45 on the outer cooler 33 side. As shown in the figure, the rectangular cooling chamber 45 when viewed from above is divided into an inlet chamber 49 and an outlet chamber 50 by a heat exchanger 48 for the outer cooler 33, which is elongated. An inlet 51 formed in an elongated rectangular shape along the heat exchanger 48 is provided at one end in the longitudinal direction of the inlet chamber 49. The introduction port 51 is connected to the spiral chamber 22 of the second stage compressor 6 via a communication passage 55 whose passage cross-sectional area gradually increases as shown in FIG. On the other hand, a discharge port 52 is provided at the other end of the outlet chamber 50 in the longitudinal direction. A discharge pipe 53, which is integrally cast on the side of the box body 46, is connected to the discharge port 52. A discharge port 56 is formed at the tip of the discharge pipe 53.

The heat exchangers 47 and 48 have a plurality of fin plates 57 arranged orthogonally to the longitudinal direction thereof, and a plurality of water pipes (not shown) provided through the fin plates 57. A seal baffle 58 is provided above and below the fin plate 57, and a seal member 59 provided on the seal baffle 58. The seal baffle 58 guides the air from one side surface of the heat exchanger 47, 48 to the other side surface thereof, and the seal member 59 seals between the seal baffle 58 and the inner surfaces of the cooling chambers 44, 45 to cool the cooling chambers. The insides of 44 and 45 are divided into an inlet chamber 49 and an outlet chamber 50, respectively.

Next to the cooling chambers 44 and 45, as shown in FIG. 5, an oil storage chamber 60 integrally cast with the box body 46.
Is provided. The oil storage chamber 60 includes a gear device 3
Oil for lubricating the large-diameter gear 14, the small-diameter gear 15, the rotating shaft 4 to which the impellers 16 and 17 are attached, and the like are stored. The oil level in the oil storage chamber 60 is displayed on the oil level gauge 61 shown in FIG. 2, and the oil pressure is displayed on the manometer 62.

The oil in the oil storage chamber 60 passes through the oil pipe 63 and is directly connected to the gear shaft 11 by the main oil pump 6
4 is pumped up and guided through the oil pipe 65 to the oil cooler 66. Then, after being cooled, the oil is supplied to the bearing 18 and the like of the rotary shaft 4 through the oil pipe 67. Further, the oil supplied is collected in the oil storage chamber 60. In addition, in FIGS. 1-3, 68 is a sub oil pump. The sub oil pump 68 is driven by the dedicated motor 69 prior to the activation of the drive motor 1 that drives the main oil pump 64, and the bearing 18 of the rotary shaft 4 is previously driven.
And so on.

Further, 70 is a drain outlet of the intercooler 29, 71 is a drain outlet of the outer cooler 33, 72 is an oil supply port of the oil tank 60, 73 is an oil discharge port of the oil tank 60, 74 is cooling of the inter and the outer coolers 29, 33. A water inlet, 75 is a cooling water outlet of the inter and outer coolers 29 and 33, 76 is a cooling water inlet of the oil cooler 66, 7
7 is a cooling water outlet of the oil cooler 66, 78 is a control panel, 7
9 is a terminal box.

The operation of this embodiment having the above configuration will be described.

The first-stage compressor 5 is arranged on the side of the drive motor 1, the second-stage compressor 6 is arranged on the opposite side thereof, and the suction pipe 7 of the first-stage compressor 5 and the side of the drive motor 1 are provided. Since the suction filter 8 is arranged in parallel, the suction pipe 7 and the suction filter 8 do not project as in the conventional case, and the installation area of the entire turbo compressor becomes substantially quadrangular and compact. As a result, the installation area can be reduced by about 25% compared to the conventional one.

Also, the heat exchanger 47 for the intercooler 29
Since the heat exchanger 48 for the outer cooler 33 and the heat exchanger 48 for the outer cooler 33 are housed in a box body 46 of a substantially rectangular parallelepiped shape provided below the first stage compressor 5, the second stage compressor 6 and the gear device 3, a cooling mechanism is provided. The overall configuration of the turbo compressor including it becomes compact. That is, the box 46 is a storage box for a cooling mechanism such as the intercooler 29, and also serves as a support base for the compressor 5 and the like.

In other words, this turbo compressed air is used as a cooling mechanism in the heat exchangers 47, 4 on the first floor where the box body 46 is located.
8 is provided, and the compressors 5 and 6 as the compression mechanism and the drive motor 1 as the drive mechanism are provided in the upper portion of the second floor, and thus the turbocompressor as a whole has a two-story structure. The configuration of becomes compact.
Further, since the oil storage chamber 6 is provided in the box body 46, the entire configuration including the oil storage mechanism can be made compact.

In addition, an inlet 51 formed in an elongated rectangular shape along the heat exchangers 47, 48 is provided at one end of the inlet chamber 49 of each cooling chamber 44, 45, and an outlet is provided at the other end of the outlet chamber 50. Since 52 is provided, the air that has flowed into the inlet chamber 50 from the inlet 51 passes through the heat exchangers 47 and 48 substantially evenly, flows into the outlet chamber 50, and is discharged from the outlet 52. Therefore, the heat exchange rate is improved.

[0033]

In summary, the turbo compressor according to the present invention has the following excellent effects.

(1) According to the invention of claim 1, the first-stage compressor, the second-stage compressor, the gear device, the drive motor, the suction pipe and the suction filter of the first-stage compressor are substantially viewed from above. Since they are arranged in a rectangular shape, the installation area can be reduced.

(2) According to the invention of claim 2, the cooling mechanism is provided in the box body which is the first floor portion, and the compression mechanism and the drive mechanism thereof are arranged in the second floor portion. The configuration of the entire device as a compressor can be made compact.

(3) According to the invention of claim 3, at one end of the inlet chamber is provided an elongated inlet formed along the heat exchanger,
Since the discharge port is provided at the other end of the outlet chamber, the fluid flows through the heat exchanger substantially evenly, and the heat exchange rate can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a turbo compressor showing an embodiment of the present invention.

FIG. 2 is a side view of the turbo compressor.

FIG. 3 is a front view of the turbo compressor.

FIG. 4 is a diagram showing first and second stage compressors and a gear device.

FIG. 5 is a diagram showing a flow of pressurized air.

FIG. 6 is a diagram showing how air flows in a cooling chamber.

[Explanation of symbols]

 1 Drive Motor 2 Output Shaft 3 Gear Device 4 Rotating Shaft 5 First Stage Compressor 6 Second Stage Compressor 7 Suction Pipe 8 Suction Filter 29 Intercooler 33 Outer Cooler 44, 45 Cooling Chamber 46 Box 47, 48 Heat Exchanger 49 Inlet Room 50 Exit room 51 Inlet 52 Outlet

Claims (3)

[Claims] 1. A turbo compressor in which a rotary shaft is arranged in parallel with an output shaft of a drive motor via a gear device, and a first stage compressor and a second stage compressor are connected to both sides of the rotary shaft, The first stage compressor is arranged on the side of the drive motor, the second stage compressor is arranged on the opposite side, and the suction pipe and the suction filter of the first stage compressor are arranged in parallel on the side of the drive motor. Characteristic turbo compressor. 2. A substantially rectangular parallelepiped box body whose inside is divided into two cooling chambers is provided below the first-stage compressor, the second-stage compressor, and the gear device, and one of the cooling chambers has a box-shaped body. A heat exchanger for an intercooler that cools the fluid discharged from the first-stage compressor and guides it to the second-stage compressor is provided, and the fluid discharged from the second-stage compressor is cooled in the other cooling chamber. The turbo compressor according to claim 1, further comprising a heat exchanger for an outer cooler that exhausts the air. 3. The heat exchanger is formed to be elongated along the longitudinal direction of the cooling chamber, the heat exchanger is arranged in the center of the cooling chamber, and the cooling chamber is divided into an inlet chamber and an outlet chamber, and the inlet is provided. The turbo compressor according to claim 2, wherein an elongated inlet formed along the heat exchanger is provided at one longitudinal end of the chamber, and an outlet is provided at the other longitudinal end of the outlet chamber. .