JPH1162817A - Boosting supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a plunger piston and a connecting rod by a simple constitution, facilitate the manufacturing and maintenance inspection and make the plunger piston and the connecting rod difficult to be broken by performing the engagement of the plunger piston and the connecting rod by expulsion force acting in the direction excluding the plunger piston from the inside of a cylinder. SOLUTION: In a compression coil spring 9, one end is supported by the side end face of a connecting rod 3 of a cylinder 1 and the other end is supported by an annular swelling part of a plunger piston 2 which normally projects from the cylinder 1, the inside diameter is larger than that of the cylinder 1 and the outside diameter is larger than the inside diameter of a cylindrical guide 8. The side end face of the annular swelling part of the plunger piston 2 situated at the connecting rod 3 is formed into a rounded convex face. Therefore, the plunger piston 2 and the connecting rod 3 engaged via repulsive force of the compression coil spring 9 do not separate even if the connecting rod 3 receive force from a crank and performs a reciprocating operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor and a pump for compressing a gas to obtain a high-pressure gas and for discharging a liquid at a high pressure.

[0002]

2. Description of the Related Art As an apparatus of this type, for example, as shown in FIG. 4, an elongated cylindrical plunger piston 2 is inserted into a cylinder 1 from one end thereof so as to advance and retreat, and this plunger piston 2 is not shown. When the connecting rod 3 that reciprocates under the force of the crank and pushes the cylinder 1 into the cylinder 1, the suction valve 4 opens to compress the gas in the compression chamber 6 that has been sucked, and the pressurized gas is discharged to the discharge valve 5.
When the connecting rod 3 receives the force from the crank and retreats, and the force from the connecting rod 3 stops acting on the plunger piston 2, the suction valve 4 opens, and the pressure of the gas flowing from the opening causes the suction valve 4 to open. A free-piston type booster supply device 50 that operates in a direction in which a plunger piston 2 is pushed out of a cylinder 1 is known.

Reference numeral 7 denotes a guide ring made of, for example, ethylene tetrafluoride (PTFE), which is mounted on the outer peripheral surface of the connecting rod 3. Reference numeral 8 denotes an aluminum or steel material including the cylinder 1, the plunger piston 2, the connecting rod 3, and the like. It is a cylindrical guide made of.

[0004] The booster supply device 50 having this configuration has a feature that the configuration is simple. However, due to the relationship between the internal pressure of the compression chamber 6 and the stop angle of the crank for reciprocating the connecting rod 3, the plunger piston is driven. The connecting rod 2 may be separated from the connecting rod 3.

When the apparatus is started in this state, there is a danger that the connecting rod 3 collides with the plunger piston 2 during the compression stroke, causing a violent noise or damaging the members.

Further, even when the plunger piston 2 and the connecting rod 3 are stopped in contact with each other, when the starting operation starts from the retreat of the connecting rod 3, the plunger piston 2 and the connecting rod 3 are once separated from each other and then subjected to a compression stroke. Colliding with each other, causing the aforementioned problems such as noise.

Further, when compressing gas, there is a concern that resonance occurs due to the spring effect of the compressed gas, generating noise and damaging the cylinder 1, the plunger piston 2, and the like.

On the other hand, a device in which the plunger piston 2 and the connecting rod 3 are connected via a bearing member 10 as shown in FIG. 5 so that no side pressure acts on the plunger piston 2 is disclosed in, for example, US Pat. No. 5,033,940. Proposed.

According to this configuration, since there is no collision between the plunger piston 2 and the connecting rod 3, a strong collision sound is generated, parts are easily damaged, and resonance occurs in the case of gas compression. The problem that has been a problem with the free-piston type booster has been solved. However, due to the complicated structure, not only the number of parts increases, the price increases, but also the durability decreases. There was also.

[0010]

Therefore, it is necessary to connect the plunger piston and the connecting rod with a simple structure, to facilitate manufacture and maintenance and to prevent breakage.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and comprises a cylinder, a plunger piston inserted in the cylinder,
In a pressurized supply device formed with a connecting rod that engages with a plunger piston and reciprocates the plunger piston, the engagement between the plunger piston and the connecting rod is shifted in a direction that removes the plunger piston from the cylinder. The first one which is performed by the acting repulsive force
A booster supply device having the configuration of

[0012] In the boosting supply device of the first configuration,
A step-up supply device having a second configuration in which one end is locked to the cylinder side and the other end is applied with a repulsive force by a compression coil spring locked to the plunger piston side;

In a pressurized supply apparatus for pressurizing a required fluid in multiple stages by interlocking a plurality of reciprocating compression sections, at least one of the reciprocating compression sections uses the first or second configuration of the pressurized supply apparatus. By providing the multi-stage boosting supply device described above, the problem of the related art is solved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In these figures, the same reference numerals are given to the parts having the same functions as those described in FIGS. 4 and 5 for easy understanding.

In FIG. 1, reference numeral 9 denotes one end of the cylinder 1 which is supported by an end face on the connecting rod 3 side of the cylinder 1 and the other end of which is supported by an annular bulging portion of a plunger piston 2 which always projects from the cylinder 1. Is a compression coil spring whose outer diameter is larger than the inner diameter of the cylindrical guide 8. The end face of the plunger piston 2 on the side of the annular bulging portion facing the connecting rod 3 is formed as a rounded convex surface.

For this reason, the plunger piston 2 and the connecting rod 3 can contact each other at an arbitrary angle between the center portions of the opposing surfaces, and the plunger piston 2 pushed into the cylinder 1 by the connecting rod 3 In the direction in which the cylinder 1 extends, and smoothly enters the cylinder 1 while exerting a uniform force on the inner surface of the cylinder 1, so that the sliding resistance is reduced to the same level as the free piston.

The repulsive force of the compression coil spring 9 is such that the plunger piston 2 does not separate even when the connecting rod 3 reciprocates, that is, the inertia of the plunger piston 2 and the sliding resistance between the cylinder 1 and the piston. Increase the strength.

Therefore, the booster 5 according to the present invention
At 0, even if the connecting rod 3 reciprocates under the force of the crank, the engaged plunger piston 2 and the connecting rod 3 do not separate from each other via the elastic force of the compression coil spring 9.

Therefore, regardless of the stop angle of the crank,
Also, when the connecting rod 3 is started in the retreating direction, the plunger piston 2 and the connecting rod 3 do not separate from each other, so that no collision sound is generated at the time of starting.

FIG. 2 shows four reciprocating compression units 101 and 100 disclosed in, for example, Japanese Patent Application Laid-Open No. 7-139462.
102, 103 and 104 are arranged so as to reciprocate on orthogonal shafts 105 and 106. For example, when a low-pressure natural gas of about 0.2 to 0.3 MPa is supplied from a city gas pipe or the like, a reciprocating compression unit is provided. 1 shows a cross-section of a multi-stage pressurizing supply device 100 that sequentially increases the pressure from 101. For example, the final stage reciprocating compression unit 104 that pressurizes and discharges to about 20 MPa is configured by the pressurizing supply device 50. is there. In the drawings, reference numeral 107 denotes a crank chamber, and 108 denotes a crank shaft.

In the multi-stage pressurizing and supplying apparatus 100 having this structure, the final reciprocating compression section for obtaining the highest pressure is constituted by the pressurizing and supplying apparatus 50 having the above-mentioned simple mechanism, so that manufacture and maintenance and inspection can be easily performed. Not only that, it was harder to break and durability was improved.

Since the present invention is not limited to the above embodiment, various modifications can be made without departing from the spirit of the present invention.

For example, the end surface of the connecting rod 3 is formed as a rounded convex surface.

Further, instead of the compression coil spring, it is possible to use the repulsive force of a magnet. For example, as shown in FIG. 3, a magnet 11 having the same polarity may be fixed to the end of the cylinder 1 and the plunger piston 2.

[0025]

As described above, according to the present invention, since the plunger piston and the connecting rod are engaged via the compression coil spring, even when stopped, the connecting rod starts in the retreating direction. Also in the above, since the plunger piston and the connecting rod do not separate, there is no collision. Therefore, noise can be reduced, and the durability of the member is improved.

Further, since the mechanism is simple, not only the manufacturing is easy, but also the maintenance and inspection can be easily performed, and the device exhibits excellent durability as a high-pressure specification device.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a boosting supply device according to the present invention.

FIG. 2 is an explanatory diagram of a multi-stage boost supply device according to the present invention.

FIG. 3 is an explanatory view of a modified embodiment of the boosting supply device according to the present invention.

FIG. 4 is an explanatory diagram of a conventional technique.

FIG. 5 is an explanatory diagram of another conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Plunger piston 3 Connecting rod 4 Suction valve 5 Discharge valve 6 Compression chamber 7 Guide ring 8 Cylindrical guide 9 Compression coil spring 11 Magnet 50 Booster supply unit 100 Multistage booster supply unit 101 Reciprocating compression unit 102 Reciprocating compression unit 103 Reciprocating compression Part 104 Reciprocating compression part 105 Shaft 106 Shaft 107 Crank chamber 108 Crankshaft

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F04B 35/01 F04B 35/00 101A F16C 7/02 F16J 1/10

Claims (4)

[Claims] 1. A pressurizing supply device comprising a cylinder, a plunger piston inserted into the cylinder, and a connecting rod engaged with the plunger piston to reciprocately drive the plunger piston. A pressurizing supply device, wherein the engagement between the piston and the connecting rod is performed by a repulsive force acting in a direction for removing the plunger piston from the inside of the cylinder. 2. The booster supply device according to claim 1, wherein an expulsion force is applied by a compression coil spring having one end locked to the cylinder and the other end locked to the plunger piston. 3. The step-up supply device according to claim 1, wherein a repulsion force is applied by a magnet fixed to the cylinder side and a magnet fixed to the plunger piston side. 4. A pressurized supply device for pressurizing a required fluid in multiple stages by interlocking a plurality of reciprocating compression units, wherein at least one of the reciprocating compression units includes the pressurized supply device according to any one of claims 1 to 3. A multi-stage pressurized supply device characterized by being used.