JP2020041501A - Cylinder type air compressor - Google Patents

Abstract

To provide a cylinder type air compressor capable of eliminating noise pollution in the neighborhood and extracting clean compressed air with a small amount of energy.SOLUTION: A cylinder type air compressor comprises a compressor body 10 that compresses introduced outside air and sends it to an air tank 30, and a hydraulic circuit 20 that generates a flow rate and a pressure in oil stored in an oil tank 23 by turning an oil pump 22 using a motor 21 as a power source. The compressor body 10 has an air cylinder 12 arranged around an oil cylinder 11 that is operated by the hydraulic pressure from the hydraulic circuit 20, and generates compressed air by linking the movement of the air cylinder 12 with the reciprocating stroke of the oil cylinder 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cylinder-type air compressor that can remove noise pollution to a neighborhood, save energy, and extract clean compressed air.

  Conventionally, a reciprocating reciprocating type and a rotary twin screw type have been known as compressors for producing compressed air. The existing reciprocating type has a disadvantage in that vibration and noise are large because the compression is performed by changing the space volume of the compression chamber by the action of the piston reciprocating inside the cylinder. In addition, the existing twin-screw type is manufactured using high-precision and advanced technology, so there is a problem that maintenance is important due to the precision of the mechanism and running costs are high.

On the other hand, in recent years, large-sized machine tools, molding devices, assembling devices, etc., utilize both characteristics of hydraulic pressure, which is an incompressible fluid, and air, which is a compressible fluid, to operate both a hydraulic operating portion and a pneumatic operating portion. The one that incorporates it is considered. However, even in such a device or system that shares hydraulic pressure and pneumatic pressure, the hydraulic mechanism and the pneumatic mechanism are generally provided as independent systems.
Based on such a technical background, for the purpose of increasing the energy efficiency for operating the hydraulic and pneumatic mechanisms, for example, the following prior arts have been proposed.

  Japanese Patent Application Laid-Open No. 2001-317664 (Patent Document 1) has an object to provide an air compression device that creates a compressed air source of a pneumatic mechanism by using the remaining force on the hydraulic mechanism side in a device that shares hydraulic pressure and air pressure. An air tank that stores compressed air to be sent to a compressed air use site, a compressor body that compresses introduced outside air and sends it to the air tank, a hydraulic motor that drives the compressor body, An "air compression device" has been proposed which comprises a hydraulic unit that supplies hydraulic oil to the hydraulic motor to operate the motor.

Japanese Patent Application Laid-Open No. 7-35101 (Patent Document 2) discloses a hydraulic and pneumatic composite in which a single motor drives a hydraulic supply source and an air pressure supply unit to improve economical efficiency and reliability. For the purpose of providing a supply unit, a main body including a hydraulic tank and a pneumatic accumulator, a single motor fixed to the main body, and a fixed motor provided to the main body, connected to an output shaft of the motor. A hydraulic pump driven by a hydraulic pump drive shaft, and a compressor fixed to the main body and driven by a compressor drive shaft connected to an output shaft of the motor. An "oil-pneumatic combined supply unit" has been proposed.

JP 2001-31764 A JP-A-7-35101

  The present invention has been developed by the inventor of the present application, and by introducing an original structure that operates the oil cylinder by oil pressure and simultaneously operates the air cylinder, large vibration and noise are not generated, and energy efficiency is improved. An object of the present invention is to provide a cylinder-type air compressor that can take out high-pressure, clean compressed air.

  In order to solve the above-mentioned problem, the invention according to claim 1 stores a compressor body that compresses introduced outside air and sends the compressed air to an air tank, and that is stored in the oil tank by rotating an oil pump using a motor as a power source. A hydraulic circuit for creating a flow rate and a pressure in the oil, the compressor body is provided with an air cylinder around an oil cylinder operated by the hydraulic pressure of the hydraulic circuit, and the reciprocating stroke of the oil cylinder It is characterized by producing compressed air by interlocking the movement of the air cylinder.

  According to a second aspect of the present invention, the oil cylinder according to the first aspect is provided at a center of an operating portion of the compressor body, and one or more air cylinders are provided around the oil cylinder. Are arranged.

  According to a third aspect of the present invention, there is provided a first aspect in which an air filter is connected to two places communicating with the rod side and the piston side of the air cylinder according to the first or second aspect to suck outside air into the cylinder. A check valve and a second check valve for discharging the compressed air in the cylinder to the air tank are provided, and when the rod side of the air cylinder is compressed, the inside of the piston side sucks air through the first check valve at the same time. When the compressed air inside the rod side is sent to the air tank through the second check valve, while compressing the piston side of the air cylinder, the rod side inside sucks air through the first check valve and at the same time as the piston side inside. Compressed air is sent to the air tank through the second check valve. .

  According to a fourth aspect of the present invention, when the operation of the oil cylinder and the air cylinder according to the third aspect is stopped, the stop position of the piston that slides in the cylinder is set to the upper end side or the lower end side of the cylinder. It is characterized by controlling.

As described above, according to the present invention, the following special effects can be obtained by adopting a simple structure in which the oil cylinder is operated by the oil pressure and the air cylinder is interlocked at the same time.
(1) Low noise, low vibration, and noise can be reduced to 1/20, and can be used in houses.
・ Night driving is also possible depending on the area.
(2) Electricity is expected to be 1/10 or less due to energy consumption and simple structure.
(3) It can be easily created from small-scale system to large-scale system. It can be made from a small, lightweight and compact system type.
・ Adjustment of air flow rate is easy by increasing or decreasing the number of air cylinders.
・ It can be inserted into the existing equipment piping.
(4) Clean compressed air and oil-less means that clean compressed air can be supplied and can be used in medical and food-related applications.
(5) Long life and no equipment consumption, maintenance frequency can be reduced, and long life cost can be reduced.
Until now, the piston was operated at high speed for air compression. As the air is compressed at high speed, it gradually becomes hot. Next, when the compressor was stopped, the heated air was suddenly cooled and water droplets were generated, and gradually accumulated in the compressor. . In the present invention, since the air is hardly heated by compressing slowly without operating at a high speed, the wear is expected to be minimized, so that a long life can be expected.

It is an example of the fluid circuit diagram of the cylinder type air compressor concerning the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows (a) shortened state and (b) expanded 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. It is sectional drawing (xx, yy, zz) of the cylinder type air compressor shown in FIG. It is sectional drawing (a) which shows other embodiment, (b).

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, each configuration of the cylinder type air compressor according to the present invention is not limited to the following embodiments, and can be appropriately changed depending on the use situation.

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

  As shown in FIGS. 1 to 4, the compressor main body 10 includes an oil cylinder 11 installed at the center of the operating part, and four air cylinders 12 around the oil cylinder 11. The lower and upper ends of the oil cylinder 11 are fixed to the bottom plate 113 and the top plate 114, and the lower and upper ends of the air cylinder 12 are fixed to the bottom plate 123 and the top plate 114. For this reason, as shown in FIG. 2, the movement of the air cylinder 12 is linked to the reciprocating stroke of the oil cylinder 11 to produce compressed air and send it to the air tank 30. In the conventional reciprocating type, pressure is applied only in one direction. However, 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 pressure can be applied in two directions, and the compression efficiency is good and the crank is internally provided. Since no screws or screws are used, the only source of noise is the motor noise, and no loud vibrations or noises are generated.

  The number of air cylinders 12 arranged around the oil cylinder 11 is not limited to the four types shown in the figure, and one or a plurality of types can be selected according to usage conditions. The type may be changed to three types shown in a), eight types shown in FIG. The strong force of the oil cylinder 11 can move up to 10 to 20 air cylinders of the same size of the oil cylinder 11 at the same time. In addition, it is possible to produce quiet, large-volume compressed air by smooth vertical movement.

As shown in FIG. 1, first check valves 13 a and 13 b connected to an air filter 15 and sucking outside air into the cylinder and compression inside the cylinder are connected to two places communicating with the rod 121 and the piston 122 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 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. Can be On the other hand, when the piston 122 side of the air cylinder 12 is compressed, the inside of the rod 121 sucks air through the first check valve 13b, and at the same time, the compressed air inside the piston 122 flows through the second check valve 14a. Sent to

  Further, by providing the position of the pistons 112 and 122 sliding in the cylinder or a pressure detecting means (not shown), when the operation of the oil cylinder 11 and the air cylinder 12 is stopped, the oil cylinder 11 and the air cylinder 12 stop at the upper end side or the lower end side. A configuration for controlling the position may be added.

According to the present invention, the adjustment of the air flow rate is facilitated by increasing or decreasing the number of air cylinders, and can be inserted into the compressor piping of the existing equipment, and the air tank can be used as it is. In addition, since it has a simple structure, mass production is easy. Furthermore, since it is oil-less, it can supply clean compressed air and can be used for medical and food-related applications.

10 Compressor 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 (4)

Equipped with a compressor body that compresses the introduced outside air and sends it to the air tank, and a hydraulic circuit that creates a flow rate and pressure in the oil stored in the oil tank by turning the oil pump using the motor as a power source,
The compressor body is provided with an air cylinder around an oil cylinder that is operated by the oil pressure of the hydraulic circuit. Characteristic cylinder type air compressor. The cylinder according to claim 1, wherein the oil cylinder is installed at a center of an operating part of the compressor body, and one or more air cylinders are arranged around the oil cylinder. Type air compressor. A first check valve connected to an air filter and sucking outside air into the cylinder and a second check valve discharging compressed air in the cylinder to the air tank are provided at two places communicating with the rod side and the piston side of the air cylinder. ,
When the rod side of the air cylinder is compressed, the inside of the piston side sucks air through the first check valve, and at the same time, the compressed air inside the rod side is sent to the air tank through the second check valve. 2. When the piston side is compressed, the inside of the rod side sucks air through the first check valve and the compressed air inside the piston side is sent to the air tank through the second check valve. Or the cylinder type air compressor according to claim 2. The cylinder type air compressor according to claim 3, wherein when the operation of the oil cylinder and the air cylinder is stopped, a stop position of a piston that slides in the cylinder is controlled to an upper end side or a lower end side of the cylinder. .