CN87104576A

CN87104576A - Multi-cavity isopiestically sealed cylinder with suspended piston

Info

Publication number: CN87104576A
Application number: CN 87104576
Authority: CN
Inventors: 邓真根
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-06-29
Filing date: 1987-06-29
Publication date: 1988-04-13

Abstract

The invention discloses a kind of means of press seals cylinders such as multi-cavity that utilize pressure that piston is suspended.It utilizes the pressure and the sealed tire of flowing medium pressure work system itself that clutch release slave cylinder is sealed, and piston is suspended, thereby can eliminate the seepage of sealing in theory fully, and the power consumption of eliminating the friction between piston guide material and the casing wall and producing therefrom, problems such as heating and wearing and tearing, compared with the prior art, applicability height of the present invention, long service life, with low cost, using scope is wide.

Description

The present invention relates to a kind of liquid, gas or liquid gas mixture flowing medium pressure working cylinder, particularly adopt pressure-tight multi-cavity isopiestically sealed cylinder with suspended piston, belong to liquid, pressure technology field.

Liquid, cylinder in existing liquid, the pressure technology all are to adopt V-arrangement or the sealing of X-shaped rubber seal between its inboard wall of cylinder block and the outside piston cylinder.And all be to adopt the O-ring seals sealing between cylinder cap hole wall and piston rod outer surface, the elasticity of this dependence material, the non-pressure sealing of the method implementation of staying quantity of material is given in employing, its seal degree will be subjected to the influence of following various factors: 1, material gives the allowance size, 2, elastic properties of materials is subjected to the etch of flowing medium and aging in time, 3, inboard wall of cylinder block tolerance of size and form and position tolerance or the like, the leakage problems of flowing medium never has fine solution.

Simultaneously the to-and-fro motion of piston in cylinder body is liner material and cylinder cap hole wall neck bush guiding by section surface in the piston in the prior art, so can produce inevitably shortcoming such as friction, wasted work, heating.

The objective of the invention is at prior art be not the principle of taking to utilize the pressure of flowing medium pressure system itself, design a kind of dependence structural feature and carry out pressure-tight flowing medium cylinder, and piston is suspended in cylinder by wiper seal.

The implementation of the object of the invention is: in the piston body that has bullport and circular groove (1), install safety check (2) and working seal tire (3), the two ends of the cylinder body (4) that closely contacts with working seal tire (3) also have guide hole and circular groove, and safety check (5) and working seal tire (6) are equipped with in the inside.The number of working seal tire is n.(n is a natural number)

When the form of cylinder is that piston rod formula and pressure flow moving medium turnover cylinder are to finish by the endoporus at piston rod (1) two ends, enter pressure medium behind piston rod (1) endoporus so through bullport toward check valve (2) and safety check (5), after pushing safety check (2) and safety check (5) open, pressure medium flows into sealed tire (3) and sealed tire (6), after the flowing medium in sealed tire (3) and the sealed tire (6) is full of and has certain pressure, the active chamber of cylinder is just opened, at this moment flowing medium cylinder just has the sealed tire (3) that is connected with active chamber, three chambeies such as sealed tire (6) high-pressure working chamber simultaneously are to utilize means of press seals such as the pressure of native system carries out, according to the Bath principle as can be known, the pressure of flowing medium equates in these three chambeies, the place that needs in the cylinder to seal all obtains wiper seal, and the pressure in the Seal cage increases simultaneously with the increase of the pressure in the active chamber.When active chamber increases to the limit, makeshift valve in the pressure system of flowing medium has played effect, flowing medium will inject the endoporus of the other end of piston (1), original flowing medium goes out from the former orifice flow that enters in the cylinder, at this moment safety check (2) and safety check (5) that former sealed tire (3) and sealed tire (6) are preceding work, thereby make the pressure in its chamber of continuation maintenance, two chambeies such as sealed tire (3) and sealed tire (6).The flowing medium that enters the other end at first promotes another group safety check (2) and safety check (5) and flows into another and organize sealed tire (3) and sealed tire (6).Like this, when treating the pressure rise in three new chambeies, the synergy in four wiper seal chambeies has produced new effect; They press to piston with circumferential well-distributed pressure together, and piston is suspended in cylinder.

If the pressure flow moving medium is the guide hole turnover cylinder through the cylinder body two ends, can obtains the wiper seal cylinder equally by above-mentioned similar structure, and the cylinder inner carrier is suspended.

When the form of cylinder is plunger type, no matter cylinder body is the amputation formula or holds back formula, according to the principle of the pressure of taking to utilize flowing medium pressure system itself, designs corresponding structure, still can obtain the wiper seal cylinder, and make the suspension type of force plunger in the cylinder.

In a word, so long as the cylinder in the flowing medium pressure work system suspends no matter its structure how, can realize sealing of three cavity pressures and pressure, the flowing medium that flows into simultaneously in the cylinder can be liquid, gas or liquid gas mixture.

Fig. 1 is the schematic representation from the piston rod formula cylinder of piston two ends bullport turnover flowing pressure medium;

Fig. 2 is the schematic representation from the piston rod formula cylinder of cylinder body two ends bullport turnover flowing pressure medium;

Fig. 3 is a plunger type cylinder schematic representation.

In Fig. 1 and Fig. 2, (1) is piston, and (2) are safety check, and (3) are sealed tires, and (4) are cylinder bodies, and (5) are safety check, and (6) are sealed tires.

In Fig. 3, (1) is plunger, and (2) are safety check, and (3) are sealed tires, and (4) are cylinder bodies, and (5) are safety check, and (6) are sealed tires.

Advantage of the present invention is:

1, the applicability height of product: the means of press seals such as three chambeies can guarantee ne-leakage theoretically; Life-span is long, and piston suspends and to have eliminated friction and consequent energy consumption, heating and the wearing and tearing of piston guide part and the inside wall of cylinder in the prior art fully;

2, the manufacturing cost of product is low than prior art, because the piston that suspends is to the required precision reduction of inboard wall of cylinder block;

3, the scope of application of product is wider. Prior art be widely used in digging, smelting, forging and pressing, lathe, ships, aircraft, automobile, chemical industry, handling machinery, food processing etc. each Industry.

The number that the present invention can increase annular seal space makes product develop in high-strength high pressure direction, can also reduce the number (reduce to the annular seal space that is connected with working chamber and only have) of annular seal space, make product accurately, future development flexibly, thereby make product spread all over all industry.

Claims

1, a kind of flowing medium pressure system clutch release slave cylinder that constitutes by cylinder body (4) and piston (1), the isobaric cylinder with suspended in n chamber particularly, it is characterized in that having two ends to have the bullport of symmetry and the piston body (1) of circular groove, safety check (2) and sealed tire (3) are housed in the piston body (1).The two ends of cylinder body (4) have the bullport and the circular groove of symmetry, and safety check (5) and sealed tire (6) are equipped with in cylinder body (4) the inside.

2, by the described multi-cavity isopiestically sealed cylinder with suspended piston of claim 1, the number that it is characterized in that the working seal tire is n, and n is a natural number.

3,, it is characterized in that the flowing medium that flows in the cylinder can be liquid, gas or liquid gas mixture by the described multi-cavity isopiestically sealed cylinder with suspended piston of claim 1.

4,, it is characterized in that high-pressure working chamber is to utilize means of press seals such as the pressure of this work system carries out by the described multi-cavity isopiestically sealed cylinder with suspended piston of claim 1.