JPH09170555A - Air compression unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent noise from taking place on the basis of vibration from scattering outside by making vibrationproof support for a motor and an air compressor by means of an air spring in which compressed air is charged in the case of an air compression unit provided with an oil cooling type air compressor driven by a motor, an oil separator and a return oil circuit. SOLUTION: When an oil cooling type air compressor 1 is driven by a motor 28, air is sucked in the compressor 1 to be compressed and the resultant compressed air is introduced in an oil separator by passing an ejection pie. In the case of such an air compression unit, an air spring 40 is arranged between a stand 30 on which the motor 28 and the air compressor 1 are mounted and the bottom plate 46 of a housing. And compressed air ejected from the air compressor 1 is introduced in this air spring 40 and the compressed air stored in the air spring 40 is supplied to consumers. In this way, by giving vibrationproof support to the motor 28 and the air compressor by means of the air spring 40, noise can be prevented from scattering around.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air compression unit having an air compressor driven by a motor.

[0002]

2. Description of the Related Art A system diagram of a conventional air compression unit of this type is shown in FIG. Motor of oil-cooled air compressor 1
When driven by 28, air is sucked into the compressor 1 through the air filter 2, the check valve 3, and the suction pipe 4 and compressed.
The compressed air discharged from the compressor 1 is introduced into the oil separator 6 through the discharge pipe 5, and is diverted inside to separate most of the oil contained in the compressed air.

Next, the compressed air separates the oil remaining in the cylindrical oil separator element 7 in the process of flowing from the outside to the inside, and then the check valve 8, the flexible hose 9 and the opening / closing. It is supplied to the customer through the operation valve 10.

The oil separated from the compressed air by the oil separator 6 drops and is temporarily stored in the lower part thereof. And
This oil O is extracted from the bottom of the oil separator 6 by the oil return pipe 11, enters the oil cooler 13 via the flexible hose 12, is cooled by the outside air blown by the fan 29, and then is flexible hose. 14, the temperature control valve 15, the oil filter 16, the electromagnetic on-off valve 17, and the orifice 18, and enters the suction pipe 4, and is sucked into the compressor 1 along with the air flowing therein.

The oil separated from the compressed air by the oil separator element 7 collects in the oil pan 7A, passes through the suction pipe 19, the check valve 20 and the capillary tube 21, and then the suction pipe 4
The air is introduced into the compressor 1 and is sucked into the compressor 1 along with the air flowing therein.

When the temperature of the oil passing through the temperature control valve 15 falls below a predetermined value, the temperature control valve 15 is opened, which causes the oil return pipe.
The oil from 11 is guided to the oil filter 16 through the bypass pipe 22 and the temperature control valve 15. In addition, 23 is an air vent pipe, and this air vent pipe 23 has a safety valve 24, a pressure switch 25, a pressure gauge 26,
An electromagnetic opening / closing valve 27 is provided.

The above-mentioned components and pipes are installed in a housing 30 as shown in FIG. In FIG. 3, 37 is an air inlet, 38 is an air outlet, and 39 is an electrical equipment box.

As shown in FIG. 4, the motor 28 is fastened to a pedestal 30 by bolts 35, and a plurality of bolts 32 erected on the pedestal 30 are attached to a mounting base 34 of the air compressor 1 by nuts 33, 36.
Has been concluded by

A belt 31 is wound between the pulley 28A of the motor 28 and the pulley 1A of the air compressor 1, and the air compressor 1 is driven by the motor 28 via the pulley 28A, the belt 31 and the pulley 1A. It has become.

[0010]

In the above conventional air compression unit, the motor 28 and the air compressor 1 vibrate during operation, and the vibration is transmitted to the housing 30 to dissipate noise based on the vibration. There was a problem of being done.

[0011]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above-mentioned problems, and its gist is to provide an oil-cooled air compressor driven by a motor and this air compressor. In an air compression unit comprising an oil separator for separating oil in compressed air compressed by a compressor and an oil return circuit for returning the oil separated by the oil separator to the suction side of the air compressor, the motor and An air compression unit is characterized in that the air compressor is vibration-isolated and supported by an air spring filled with compressed air obtained by the air compressor.

Another feature is that the air spring is also used as an air tank for storing compressed air.

[0013]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the invention is shown in FIG. An air spring 40 is arranged between a pedestal 30 on which the motor 28 and the air compressor 1 are installed and a bottom plate 46 of the housing 30.

Compressed air discharged from the air compressor 1 is introduced into the air spring 40 and a check valve interposed therein.
The compressed air introduced via 41 and stored in the air spring 40 is supplied to the demand destination via the air supply pipe 45 and the pressure adjusting valve 42 interposed therein. The other configuration is the same as that of the conventional one shown in FIGS. 2 to 4, and the corresponding members are denoted by the same reference numerals and description thereof will be omitted.

Since the motor 28 and the air compressor 1 are vibration-isolated and supported by the air spring 40, it is possible to prevent the vibrations of the motor 28 and the air compressor 1 from being transmitted to the housing 30. , It can prevent the noise from radiating to the surroundings. Further, since the air spring 40 also serves as an air tank, it is possible to save space.

In the above embodiment, the compressed air discharged from the air compressor 1 is directly introduced into the air spring 40, but the compressed air in the oil separator 6 can be introduced and the air The compressed air in the spring 40 can also be supplied to the customer through the oil separator 6. With this configuration, the oil separator 6 can be downsized.

[0017]

According to the present invention, since the motor and the air compressor are vibration-isolated and supported by the air spring, the spring constant of the air spring can be arbitrarily adjusted. Therefore, the noise due to the vibration of the motor and the air compressor can be adjusted. Can be prevented from being emitted to the outside.

Further, since the air spring is filled with compressed air obtained by the air compressor, the air spring can be easily filled with compressed air and the air spring can also serve as an air tank. Can be effectively utilized.

[Brief description of the drawings]

1 shows an embodiment of the present invention, (A) is a front view showing a support structure for a motor and an air compressor, and (B) is a side view.

FIG. 2 is a system diagram of a conventional air compression unit.

FIG. 3 is a partially cutaway view of a conventional air compression unit, (A) is a front view, (B) is a plan view, and (C) is a side view.

4A and 4B show installed states of a motor and an air compressor in a conventional air compression unit, where FIG. 4A is a front view and FIG. 4B is a side view.

[Explanation of symbols]

 28 Motor 1 Air compressor 30 Stand 40 Air spring

Claims (2)

[Claims] 1. An oil-cooled air compressor driven by a motor, an oil separator for separating oil in compressed air compressed by the air compressor, and the oil separated by the oil separator for the air An air compression unit having an oil return circuit for returning to the suction side of the compressor, characterized in that the motor and the air compressor are vibration-isolated and supported by an air spring filled with compressed air obtained by the air compressor. Air compression unit to. 2. The air compression unit according to claim 1, wherein the air spring is also used as an air tank for storing compressed air.