JPS6315829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The disclosed technology belongs to the technical field of pump devices that reciprocate a magnetic piston using electromagnetic force.

<Summary of the gist> The present invention relates to a pump device in which a piston moves forward and backward through a seal inside a cylinder, and output from the operation of the piston is taken out from at least one end of the cylinder. In particular, the piston is magnetized with different polarities on both sides thereof, and a pair or a group of pairs of electromagnets or excitation coils are disposed at both ends of the outer axial direction of the cylinder, so that the magnetized piston is magnetized with different polarities. This invention relates to a pump device that applies excitation that alternately repulses and attracts the piston, and also forms irregularities on the circumferential surface of the piston and magnetically fills them with magnetic oil as a seal.

<Prior art> As is well known, piston-type pump devices are often used. For example, in air pump devices such as piston-type air compressors, the crank mechanism of a cycle prime mover such as another motor is used. A reciprocating rod is connected via.

<Problems to be Solved by the Invention> However, in conventional pump devices of this type, there is a drawback that a complicated mechanism must be used for the rod seal, and the sliding surface between the piston and cylinder also has a mechanical mechanism such as a piston ring. Seals had to be used, which had the disadvantage of being abrasive, gas leaks were unavoidable, maintenance had to be carried out repeatedly, and costs were high.

At present, there is a technology that enables reciprocating motion by itself rather than obtaining reciprocating motion from other cycle prime movers such as motors via crank mechanisms and rods, for example, in Japanese Utility Model Publication No. 39-13285. Publication No. 49-116510, Japanese Patent Application Publication No. 47-1988
There are also technologies such as an electromagnetic actuator disclosed in Publication No. 20537 and the like.

Among these, the actuator disclosed in Japanese Utility Model Publication No. 39-13285 is equipped with a pair of windings wound in opposite directions in an outer frame, and each winding is connected to the collector of a transistor in a push-pull type semiconductor switching circuit. A permanent magnet is loosely inserted into the winding and held movably in the outer frame via the mandrel, and an external signal device is connected to the drive transistor device to receive an external signal. The electrodes formed at both ends of the winding are appropriately changed under the control of the device, thereby causing the permanent magnet to reciprocate.

Furthermore, in the actuator disclosed in Japanese Utility Model Application Publication No. 49-116510, a piston rod is loosely inserted into a cylindrical electromagnet fixed in a cylinder, and the piston rod is inserted at a predetermined interval into a portion on the piston rod that sandwiches the cylindrical electromagnet. A piston consisting of a pair of permanent magnets with pole faces facing each other is disposed, and the piston rod is reciprocated by alternating the magnetic poles of the electromagnets. A modified throttle valve is provided, and the reciprocating speed of the piston rod is controlled by adjusting the throttle of the variable throttle valve. A pair of electromagnets are installed so that their poles face each other, a permanent magnet is provided between the electromagnets, and a shaft supporting the permanent magnets passes through the electromagnets, and the magnetic poles of both electromagnets are alternately changed. A permanent magnet and a shaft are moved back and forth, and power is extracted from the shaft.

However, these actuators simply utilize the repulsion and attraction of electromagnets and permanent magnets to extract power in the reciprocating direction, so they are particularly susceptible to wear and sealing when the piston moves inside the cylinder. Although this is not a problem, if the principles of these actuators are used in pump devices, the sliding surfaces of the cylinder and piston must have a structure with excellent wear resistance and sealing properties, and the design of such devices must be It was hoped that he would come out.

The purpose of this invention is to solve the problems of the pump device based on the above-mentioned prior art.The purpose of this invention is to solve the problems of the pump device based on the above-mentioned prior art. In addition, the sliding surfaces of the cylinder and piston have a structure with excellent wear resistance and sealing properties, improving work efficiency and durability, and making use of power technology in the machinery industry. The purpose is to provide an excellent pump device that will benefit the field.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the present invention, which is summarized in the above-mentioned claims in accordance with the above-mentioned object, is such that the piston housed in the cylinder has different front and rear surfaces. The magnetic disc plate is magnetized to form a pole, and the non-magnetic disc plate has a slightly smaller outer diameter than the magnetic disc plate. The concave groove on the outer periphery of the plate is filled with magnetic oil as a seal, and the magnetic oil is magnetized to the magnetic disk plates on both the front and rear sides of the non-magnetic disk plate, ensuring that the outer periphery of the piston is magnetized even when used over time. In this state, the piston is actuated by excitation bodies such as electromagnets and excitation coils, which are installed on both sides of the outer axial direction of the cylinder so that the excitation can be changed freely. A technical measure is taken in which suction and repulsion are performed in the reciprocating direction, and this action causes fluid to be pumped from the cylinder section on at least one side of the piston via a check valve or the like.

<Example> Next, an example of this invention will be described below based on FIGS. 1 and 2.

In the embodiment shown in FIGS. 1 and 2, 1 is an air compressor as a pump device, and a non-magnetic cylinder 2, which is sealed except for the suction and exhaust system, has a pair of air intake ports 3, 3 on both side walls. and elastic springs 6, 6 for plates 5, 5 having external air holes 4, 4.
The check valves 7, 7 are energized by the suction port 3, so that the check valves 7, 7 can freely open and close the suction ports 3, 3.

Also, air exhaust ports 8, 8 are provided on both side walls of the cylinder 2.
Plate 1 which is opened and has inner air holes 9, 9
0 and 10 are provided with check valves 12 and 12 facing through elastic springs 11 and 11,
Furthermore, the check valves 12, 12 are connected to the discharge port 1.
3 and 13 can be opened and closed freely.

The discharge ports 13, 13 are connected to pipes 14, 1
It is connected to the reserve tank 15 via 4.

A piston 16 is installed in the cylinder 2 so that it can move forward and backward, and the cylinder 2 and the piston 1
Magnetic oil 17 is interposed between 6 and 6 as a sealing fluid that also serves as lubrication.

The magnetic oil 17 is made of, for example, colloidalized magnetite or the like in cylinder oil or the like in the form of ultrafine powder, and has good fluidity and strong non-separability.

On the other hand, as shown in FIG. 2, the piston 16 is a magnetic disk whose outer diameter is slightly smaller than the inner diameter of the cylinder 2, and whose front and back surfaces are strongly magnetized with N and S poles at least at the periphery thereof. plate 18,
18... and thin non-magnetic disk plates 18', 18'... made of a non-magnetic material and having an outer diameter smaller than that of the plate 18, are alternately integrated with bolts 19, so that the circumferential surface is doubled. The magnetic oil 17 is filled into the concave and concave grooves to form different poles N and S on both end faces, and the magnetic oil 17 is used as a lubricant and a sealing material to be applied to the cylinder 2 as described above. The interior is designed to slide freely.

Therefore, the magnetic oil 17 is
With regard to the sealing performance of the piston 16, the magnetic disk plate 1 is attached to the multi-stage uneven portion 20 of the piston 16.
It is restrained by the magnetic pole attraction force of 8, 18..., and is magnetically attached so that it does not easily peel off, and is reliably maintained.In addition, the wear resistance of the cylinder 2 and piston 16 is determined by the physical properties of the oil content. This ensures smooth relative sliding between the two.

On the other hand, at both ends of the outer axial direction of the cylinder 2, an electromagnet as an excitation body or excitation coils 21 and 22 are installed as close as possible to the cylinder 2,
The electromagnetic coil is energized by alternately switching the switches 24 and 24' at the oscillation frequency of the oscillation circuit to the terminals A and B through the terminal C connected to the power source 23, thereby adjusting the polarity N and S of both sides of the piston 16. It is connected to the electromagnetic control device 25 so that attraction and repulsion are reversed and repeated.

In the above configuration, the piston 16 moves to the left side as shown by the solid arrow, for example, by a push-pull action,
Therefore, negative pressure is generated in the right chamber 26, the check valve 8 is pushed by the elastic spring 11, closing the discharge port 13, and the check valve 7 moves against the elasticity of the elastic spring 6, thereby opening the air intake port. 3. Inhale outside air.

On the other hand, the outside air previously stored in the left chamber 27 acts to close the air intake port 3 by the check valve 7 pushed by the spring 6, and is discharged from the pipe 14 by opening the discharge port 13 of the check valve 8. , are pumped and stored in the reserve tank 15.

During this time, leakage of compressed air from the left chamber 27 to the right chamber 26 is reliably sealed by the magnetic oil 17, and peeling of the magnetic oil 17 is prevented by strong magnetic attachment to the uneven portion 20 of the piston 16. Nevertheless, the sliding friction of the piston 16 is reduced, allowing the piston 16 to slide smoothly within the cylinder 2.

When the piston 16 reaches the installation position of the electromagnet or exciting coil 21, the electromagnetic control device 2
By switching the switches 24 and 24' of No. 5, the polarities of the electromagnetic coils 21 and 22 are reversed, or the other coil 22 is energized, so that the attraction and repulsion to the piston 16 is reversed, and as a result, the piston 16 begins to shift to the right, the left and right check valves 7 and 8 open and close in the opposite direction, and the inlet 3 enters the left ventricle 27.
Outside air is taken in from the right chamber 26 , and the intake air from the right chamber 26 is discharged from the discharge port 13 and stored in the reserve tank 15 from the pipe 14 .

In this way, compressed air is stored in the reserve tank 15 by the reciprocating operation.

Further, the embodiment shown in FIG. 3 is an embodiment as a driving force source actuator 1', and the cylinders 2 and 2' are integrally connected by a bulkhead 28, with the driving actuator 1' on the left side and the compressed air source on the right side. The compressor actuator 1'' is connected to both pistons 16 and 16' by a rod 30 that slides on a guide bearing 29 of the bulkhead 28, and both pistons 16 and 16' are connected to the second
The cylinders 2 and 2' are provided with magnetic oil 17 as shown in the figure.
It is made to slide with a magnetic seal.

Therefore, the cylinder 2 of the drive actuator 1'
Electromagnetic coils 21 and 22 are arranged on the outside of both ends and connected to the electromagnetic control device as described above, and on the outside of the compressor actuator 1'' there is an intake check valve 7 and a reserve tank 1 as in the previous embodiment.
A discharge check valve 8 connected to the discharge valve 5 by a pipe 14 is provided.

Note that 31 and 31 are ventilation holes.

In this embodiment as well, the drive actuator 1'
By mutually converting the polarity or excitation of the electromagnetic coils 21 and 22, the piston 16 is attracted and repelled and moves left and right, and the piston 16' sucks in and compresses outside air, and stores the pressure in the reserve tank 15.

Therefore, similarly, no mechanical drive is applied from outside the system, and work is extracted from the piston 16.

It goes without saying that the embodiments of the present invention are not limited to the above-mentioned two embodiments, and various other embodiments can be adopted.

<Effects of the Invention> As described above, according to the present invention, at least the periphery of the front and rear surfaces of the piston, which is composed of magnetic disk plates sandwiching a non-magnetic disk plate that moves forward and backward through a seal, has magnetic polarity. Therefore, by alternately changing the polarity to different polarities on the outside of both axial ends of the cylinder, or by providing excitation bodies such as electromagnets and excitation coils whose excitation is alternately switched, the piston basically The excitation body receives a synergistic effect of attraction and repulsion, allowing the cylinder to move forward and backward in strokes from side to side, eliminating the need to take in external power via a crank mechanism or rod outside the cylinder, and as a result, The excellent effects of eliminating the risk of fluid leakage, eliminating the risk of power loss due to rod seals, and increasing the power efficiency are achieved.

Furthermore, magnetic disk plates whose peripheral edges are magnetized at least and non-magnetic disk plates whose outer diameter is slightly smaller than the magnetic disk plates are arranged alternately so that the front and rear surfaces of the piston housed in the cylinder have different polarities. The magnetic oil acts as a seal, and the grooves on the outer peripheries of the magnetic disk plate and non-magnetic disk plate are filled with magnetic oil as a seal. The concave groove on the outer periphery of the piston formed by the plate is now strongly magnetically attracted to the piston, ensuring that the seal between the cylinder and piston is always maintained even over time, and the oil content of the magnetic oil is maintained. This has the excellent effect of maintaining the wear prevention effect of the cylinder and piston.

In addition, by arranging the excitation body that operates the piston at both ends of the outer axial direction of the cylinder, the effective volume of the cylinder chamber that pumps fluid is not narrowed, and interference with the reciprocating piston is avoided. This has the effect of making quiet and efficient fluid pressure transfer possible.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a schematic sectional view of one embodiment, FIG. 2 is a schematic sectional view of a magnetic fluid seal, and FIG. 3 is a schematic sectional view of another embodiment. . 2... Cylinder (part), 17... Seal (magnetic oil), 16... Piston, 1, 1'... Pump device, 21, 21'... Exciter.

Claims (1)

[Claims] 1. In a pump device that has a piston that moves forward and backward through a seal inside the cylinder and that outputs output from a cylinder portion on at least one side of the piston, the piston has front and back surfaces of different polarities. magnetic disk plates whose peripheral edges are magnetized and non-magnetic disk plates whose outer diameter is slightly smaller than the magnetic disk plates are alternately arranged and bonded to each other, and the outer peripheries of the magnetic disk plates and the non-magnetic disk plates are A pump device characterized in that a concave groove portion of the cylinder is filled with magnetic oil as a seal, and excitation bodies capable of excitation conversion are disposed at both ends of the outer axial direction of the cylinder.