JPH03175166A - Air-cooled package shape screw compressor - Google Patents

Abstract

PURPOSE:To reduce noise, by providing within a package a partition plate between a cooler and a compressor, a motor, and fitting a both-suction fan casing to this partition plate, and sucking through respective suction openings air for cooling the cooler and air for ventilating the compressor and the motor, and simultaneously conducting exhaust. CONSTITUTION:A partition plate 7 is provided within a sound-proof cover 6, and the inside of the cover 6 is separated into an A chamber and a B chamber, and an absorption opening D is provided on the side surface of the A chamber, and a cooler 2 is arranged. Meanwhile, parts such as a compressor 3, a motor 4, an oil separator 5 are arranged at the B chamber, and an air-suction opening E is provided in the cover 6. A both-suction fan casing 8 that is also used as an exhaust duct, is fitted to the partition plate 7, and one suction opening is opened at the A chamber and the other suction opening is opened at the B chamber. Impellers 9, 10 are fixed at a fan motor 11. Cooler cooling air cools a cooler through the air-suction opening D of the A chamber and is discharged to the outside of a package by means of a cooling fan 9, and on the other hand, compressor and motor ventilation air ventilates the B chamber by making entry through the air-suction opening E of the B chamber and is discharged to the outside of the package by means of a cooling fan 10, respec tively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air-cooled package screw compressor suitable for reducing the noise of a compressor unit and downsizing a cooler.

[Conventional technology]

In conventional devices of this type, for example, as shown in Figure 4.24 in Chapter 4 of Nippon Kogyo Shuppan's ``Pumps and Compressors'', cooling air that enters the package from the package intake port is passed through the compressor and motor. After ventilation, the cooler is cooled and exhausted by a fan.

[Problem to be solved by the invention]

In a package with a conventional structure, the ventilation inside the package and the air for cooling the cooler are the same, so the package opening for air intake is large in order to take in the large amount of air necessary for cooling the cooler. There is a drawback that the noise of the compressor leaks outside through this opening. For this reason, it was necessary to provide a complicated soundproof plate at the package opening for air intake. Furthermore, the heat generated by the compressor and motor heats the cooling air before it reaches the cooler, so it is necessary to increase the capacity of the cooler in anticipation of this temperature rise.

The present invention aims to reduce noise by separating the cooler cooling air from the compressor and motor ventilation air, thereby reducing the opening through which compressor noise leaks, eliminating the temperature rise of the cooler cooling air, and improving efficiency. The inside of the mouth is designed to provide good cooling and reduce the size of the cooler.

(Means for solving the problem) In order to achieve the above objective, a partition plate is provided between the cooler and the compressor/motor in the package, and a double suction fan is attached to this partition plate, and each suction port is This is achieved by creating a structure in which air for cooling the cooler and air for ventilation from the compressor/motor are taken in and exhausted at the same time.

[Effect]

The inside of the package is divided into cooler, compressor, and motor sides, with cooling air and ventilation air flowing to each side.

Therefore, the temperature of the cooler cooling air does not rise due to heat generated by the compressor/motor, and efficient cooling can be achieved. On the other hand, since the amount of air for ventilation of the compressor and motor may be small, even if the air intake port for this purpose is made small, it will not create a large resistance, so the opening can be made smaller than before and noise leakage can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Cooler 2 on common base l. Compressor 3. Motor 4. This is a package type screw compressor in which compressor unit components such as an oil separator 5 are arranged and surrounded by a soundproof cover 6 forming a package, and the parts are arranged as follows.

A partition plate 7 is provided inside the soundproof cover 6, and the inside of the soundproof cover 6 is
The chamber is separated into a chamber and a chamber B, and a suction opening is provided on the side of the chamber A, and a cooler 2 is placed therein. On the other hand, in room B there is a compressor 3. Motor 4. Parts such as an oil separator 5 are arranged, and an intake port E is provided in the soundproof cover 6.

A dual suction fan casing 8 which also serves as an exhaust duct is attached to the partition plate 7, with one suction port opening into the A chamber and the other suction port opening into the B chamber.

The impellers 9 and 10 are fixed to the fan motor ↓1, and the fan motor 11 is fixed to the common base 1 by a support stand 12.

Impeller9. The blade width of motor 0 is determined according to the amount of air handled, and the main plates are connected to each other and fixed to motor 1 with a common boss.

The cooler cooling air cools the cooler from the intake port of the A room and is exhausted outside the package by the cooling fan 9.

On the other hand, air for compressor/motor ventilation enters from the intake port E of the B room, ventilates the B room, and is exhausted outside the package by the cooling fan 10.

〔Effect of the invention〕

The present invention has the following effects.

(+) Since the opening of the package surrounding the compressor, which is a source of noise, can be made smaller, noise can be easily reduced.

(2) Since there is no rise in temperature of the cooler cooling air, temperature efficiency can be improved and the cooler can be made smaller.

(3) Since the cooler is not placed deep inside the package, dirt and dust in the cooler cooling air can be easily cleaned.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a front view of the same.

Claims (1)

[Claims] 1. In an air-cooled packaged screw compressor that includes a compressor, a motor, an oil separator, a cooler, a cooling fan, a common base, and a package that covers these,
A partition plate is provided inside the package to divide the inside of the package into two parts.
Divided into two rooms, the cooler is placed in one room, and the compressor and motor are placed in the other room.The air for cooling the cooler and air for ventilation of the compressor and motor are supplied by dual suction fans attached to the partition plate. An air-cooled screw compressor characterized by a structure in which suction is taken into the package separately and discharged at the same time.