JP6715499B2 - Cylinder type air compressor - Google Patents

Description

The present invention relates to a cylinder-type air compressor that eliminates noise pollution in the vicinity, saves energy, and can take out clean compressed air.

Conventionally, reciprocating reciprocating type and rotating twin screw type compressors are known as compressors for producing compressed air. The existing reciprocating type is disadvantageous in that vibration and noise are large because compression is performed by changing the space volume of the compression chamber by the action of the piston that reciprocates inside the cylinder. Further, the existing twin screw type is manufactured with high precision and high technology, so maintenance is important due to the precision of the mechanism, and running costs are high.

On the other hand, in recent large-scale machine tools, molding equipment, assembly equipment, etc., both the hydraulic operating portion and the pneumatic operating portion are utilized by utilizing the respective characteristics of hydraulic pressure which is an incompressible fluid and air which is a compressible fluid. Incorporation is considered. However, even in such an apparatus or system that shares hydraulic pressure and pneumatic pressure, the hydraulic mechanism and the pneumatic mechanism are generally installed as independent systems.
Based on such a technical background, for example, the following prior arts have been proposed for the purpose of increasing energy efficiency for operating the hydraulic and pneumatic mechanisms.

Japanese Unexamined Patent Publication No. 2001-3174464 (Patent Document 1) aims to provide an air compression device that creates a compressed air source for an air pressure mechanism by utilizing the remaining power on the hydraulic pressure mechanism side in a device that shares hydraulic pressure and air pressure. As an air tank for storing compressed air to be sent to a compressed air use site, a compressor body that compresses the introduced outside air and sends it to the air tank, a hydraulic motor that drives the compressor body, and a hydraulic pressure An "air compression device" has been proposed which comprises a hydraulic unit that supplies hydraulic oil to the hydraulic motor to operate the motor.

Further, Japanese Patent Laid-Open No. 7-35101 (Patent Document 2) discloses a hydraulic/pneumatic composite in which a single motor is used to drive a hydraulic pressure supply source and an air pressure supply source to improve the economy and reliability. For the purpose of providing a supply unit, a main body provided with a hydraulic tank and a pneumatic accumulator, a single motor fixedly provided on the main body, and fixedly provided on the main body, and connected to an output shaft of the motor. A hydraulic pump driven by a hydraulic pump drive shaft, and a compressor driven by a compressor drive shaft fixed to the main body and connected to the output shaft of the motor. A "hydraulic pneumatic combined supply unit" has been proposed.

JP 2001-317464 A JP, 7-35101, A

The present invention has been earnestly developed by the inventor of the present application, and by introducing a unique structure in which an oil cylinder is operated by hydraulic pressure and at the same time an air cylinder is interlocked, large vibration and noise are not generated, and energy efficiency is improved. The purpose is to provide a cylinder type air compressor that can raise compressed air cleanly.

In order to solve the above problems, the invention according to claim 1 stores a compressor body that compresses the introduced outside air and sends it to an air tank, and an oil pump that is driven by a motor as a power source and stored in the oil tank. And a hydraulic circuit for producing a flow rate and a pressure in the oil, the compressor main body, an air cylinder is arranged around an oil cylinder operated by the hydraulic pressure by the hydraulic circuit, the oil cylinder and the air cylinder The lower end and the upper end are fixed to the bottom plate and the top plate, the oil cylinder is installed in the center of the working part of the compressor body, and a plurality of the air cylinders are arranged around the oil cylinder. by interlocking the movement of the air cylinder into a reciprocating stroke to leave make compressed air, first check valve for sucking external air is connected to the air filter in the cylinder in two places communicating with the rod side and the piston side of the air cylinder And a second check valve for discharging the compressed air in the cylinder to the air tank is provided, and when the rod side of the air cylinder is compressed, the piston side inside sucks air through the first check valve and at the same time the rod side When the compressed air inside is sent to the air tank through the second check valve, while compressing the piston side of the air cylinder, the inside of the rod side sucks air through the first check valve and at the same time compresses the inside of the piston side. The air is sent to the air tank through the second check valve .

Further, the invention according to claim 2 is a piston which slides in the cylinder by providing a piston position or pressure detection means when the operation of the oil cylinder and the air cylinder according to claim 1 is stopped. The stop position is controlled to the upper end side or the lower end side of the cylinder.

As described above, according to the present invention, by adopting a simple structure in which the oil cylinder is operated by hydraulic pressure and at the same time, the air cylinder is interlocked, the following special effects are exhibited.
(1) Low noise, low vibration, noise can be reduced to 1/20 and it can be used in a house.
・Driving at night is possible depending on the area.
(2) Energy consumption ・Electricity is expected to be less than 1/10 due to the simple structure.
(3) Easy to create from small-scale system to large-scale system ・ It is possible to produce from compact, lightweight, and compact system types, and the shape can be adapted to the space so that it can be easily placed in various fields.
-It is easy to adjust the air flow rate by increasing or decreasing the number of air cylinders.
・It is possible to interrupt the piping of existing equipment.
(4) Since clean compressed air and oil are not used, clean compressed air can be supplied and it can be used in medical and food related fields.
(5) Long service life, no equipment consumption, less maintenance frequency, and longer service cost.
Until now, pistons have been operated at high speed for air compression. When air is compressed at high speed, it gradually becomes hot. Next, when the compressor is stopped, the heated air is cooled rapidly and water droplets are generated, which gradually accumulates in the compressor so that water must be drained regularly, parts wear quickly, and regular maintenance is required. .. According to the present invention, since the air is less likely to be heated and the wear of the parts is minimized by compressing slowly without operating at high speed, a long life can be expected.

1 is an example of a fluid circuit diagram of a cylinder type air compressor according to the present invention. It is a front view which shows (a) the shortened state and (b) the extended state in 1st embodiment of the cylinder type air compressor concerning this invention. It is a top view of the cylinder type air compressor shown in FIG. FIG. 3 is a cross-sectional view (xx, yy, zz) of the cylinder type air compressor shown in FIG. 2. It is sectional drawing (a) (b) which shows other embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that each configuration of the cylinder type air compressor according to the present invention is not limited to the following examples, and can be appropriately changed depending on the usage situation.

As shown in FIG. 1, the cylinder type air compressor according to the present invention includes a compressor body 10 and a hydraulic circuit 20.
The hydraulic circuit 20 uses the motor 21 as a power source to rotate the oil pump 22 to generate a flow rate and pressure in the oil stored in the oil tank 23, and operate the solenoid valve 24 to switch the flow path.
The oil flowing out from the solenoid A enters the rod 111 side of the oil cylinder 11 and the oil cylinder 11 is shortened. The oil flowing out from the solenoid B enters the oil cylinder 11 on the piston 112 side, and the oil cylinder 11 becomes longer. (See Fig. 2, arrow indicates reciprocating stroke)

As shown in FIG. 1 to FIG. 4, the compressor body 10 includes an oil cylinder 11 installed at the center of the moving part, and four air cylinders 12 arranged around the oil cylinder 11. The lower end and the upper end of the oil cylinder 11 are fixed to the bottom plate 113 and the top plate 114, and the lower end and the upper end of the air cylinder 12 are fixed to the bottom plate 123 and the top plate 114. Therefore, as shown in FIG. 2, the reciprocating stroke of the oil cylinder 11 is interlocked with the movement of the air cylinder 12 to generate compressed air, which is sent to the air tank 30. In the conventional reciprocating type, the pressure is applied only in one direction, but in the present invention, the air cylinder 12 itself is moved up and down at the same time as the oil cylinder 11, so that the pressure can be applied in two directions, the compression efficiency is good, and the internal crank Since no motor or screw is used, the only source of noise is the motor noise, and no significant vibration or noise is generated, making it possible to use it at night.

The number of the air cylinders 12 arranged around the oil cylinder 11 is not limited to the four types shown in the figure, and one type or a plurality of types can be selected according to the usage situation. It may be changed to the three types shown in a) or the eight types shown in FIG. Note that the powerful force of the oil cylinder 11 can simultaneously move up and down 10 to 20 air cylinders of the same size as the oil cylinder 11. In addition, the smooth vertical movement makes it possible to produce quiet, large-capacity compressed air.

As shown in FIG. 1, the first check valves 13a and 13b for connecting the air filter 15 and sucking the outside air into the cylinder and the compression in the cylinder are connected to two places communicating with the rod 121 side and the piston 122 side of the air cylinder 12. Second check valves 14a and 14b for discharging air to the air tank are provided.
When the rod 121 side of the air cylinder 12 is compressed, the inside of the piston 122 side sucks air through the first check valve 13a, and at the same time the compressed air inside the rod 121 side is sent to the air tank 30 through the second check valve 14b. To be On the other hand, when the piston 122 side of the air cylinder 12 is being compressed, the inside of the rod 121 side sucks air through the first check valve 13b, and at the same time the compressed air inside the piston 122 side passes through the second check valve 14a and the air tank 30. Sent to.

Further, by providing the position of the pistons 112 and 122 sliding in the cylinder or pressure detection means (not shown), when stopping the operation of the oil cylinder 11 and the air cylinder 12, the operation is stopped at the upper end side or the lower end side of the cylinder. You may add the structure which controls a position.

In the present invention, it is easy to adjust the air flow rate by increasing or decreasing the number of air cylinders, and it is possible to interrupt the pipe of the compressor of the existing equipment, and the air tank can be used as it is. Moreover, since the structure is simple, mass production is easy. Furthermore, since it is oilless, it can supply clean compressed air and can be used in medical and food related fields.

10 Compressor Main Body 11 Oil Cylinder 111 Rod 112 Piston 113 Bottom Plate 114 Top Plate 12 Air Cylinder 121 Rod 122 Piston 123 Bottom Plate 13a, 13b First Check Valve 14a, 14b Second Check Valve 15 Air Filter 20 Hydraulic Circuit 21 Motor 22 Oil Pump 23 Oil Tank 24 Solenoid Valve 30 Air Tank

Claims (2)

The compressor body includes a compressor body that compresses the introduced outside air and sends it to the air tank, and a hydraulic circuit that uses an electric motor as a power source to rotate an oil pump to generate a flow rate and a pressure in the oil stored in the oil tank. Has an air cylinder arranged around an oil cylinder operated by hydraulic pressure by the hydraulic circuit, the lower and upper ends of the oil cylinder and the air cylinder are fixed to a bottom plate and a top plate, and the oil cylinder is compressed by the compression cylinder. machine is installed in the operation portion center of the body, wherein the air cylinder a plurality of around oil cylinder is arranged, Shi exits make compressed air in conjunction with the movement of the air cylinder into a reciprocating stroke of the oil cylinder , A first check valve connected to an air filter and connected to an air filter at two locations communicating with the rod side and the piston side of the air cylinder, and a second check valve for discharging compressed air in the cylinder to an air tank When the rod side of the air cylinder is being compressed, the piston side inside sucks air through the first check valve and at the same time the compressed air inside the rod side is sent through the second check valve to the air tank. When the piston side of the air cylinder is compressed, the rod side inside sucks air through the first check valve and at the same time the compressed air inside the piston side is sent to the air tank through the second check valve. Type air compressor. When stopping the operation of the oil cylinder and the air cylinder, the stop position of the piston that slides in the cylinder is controlled to the upper end side or the lower end side of the cylinder by providing a piston position or pressure detection means. The cylinder type air compressor according to claim 1.