CN2586839Y

CN2586839Y - High-precision flow distributing and collecting valve

Info

Publication number: CN2586839Y
Application number: CN 02280612
Authority: CN
Inventors: 袁德江
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-18
Filing date: 2002-10-18
Publication date: 2003-11-19
Anticipated expiration: 2012-10-18

Abstract

The utility model relates to a high-precision flow dividing and combining valve, which belongs to the technical field of hydraulic synchronous control elements. The utility model is characterized in that a lever which can be swung is fixed on the central position of a variable valve sleeve group, the S end of the lever is hinged on the central position of a push-pull valve spool, and two cylinder bodies of the push-pull valve spool are respectively communicated with two oil paths; an upper cover of a valve spool of a one-time throttling fixed-difference reducing valve is buckled with the upper valve spool and connected with the upper valve spool through a key shaft, and springs are arranged in the upper cover of the valve spool and the upper valve spool; the upper end of a push rod is contacted with the bottom end surface of the upper valve spool, the bottom end surface of the upper valve spool is an inclined end surface, and an intersection angle between the inclined end surface and the transverse section is 5 DEG to 40 DEG. The utility model has the advantages that the working flow rate which can be five times of the minimum working flow rate has a large adaptation range; a synchronous error (namely, a fixed error) can be slightly regulated, which facilitates users; dynamic response is increased by three to five times compared with the existing dynamic response.

Description

Highi degree of accuracy is divided combiner valve

Technical field:

The utility model belongs to Hydraulic Synchronizing control unit technical field, relates to a kind of improvement of synchronous valve.

Background technique:

At present, the synchronization control element of executive component has synchronous pump, divides afflux (synchronous valve) and synchronized cylinder three classes by textural classification in the hydraulic system, wherein simple with the synchronous valve structure, it is the most convenient to use, but the ubiquity synchronization error is adjusted inconvenience, synchronization accuracy low (3%--5%), the raising of its error adjustment and precision are the unfavorable factors of its widespread usage of restriction.

Summary of the invention:

Technical problem to be solved in the utility model is:

Provide a kind of synchronization accuracy high highi degree of accuracy branch combiner valve.

The technical solution of the utility model is:

Be fixed with the lever that can swing on variable valve pocket group switching centre position, the S end of lever is hinged on the center portion of push-and-pull spool, and two cylinder bodies at push-and-pull spool place communicate with two oil circuits respectively; The spool loam cake of a throttling Fixed differential reducing valve and upper valve core fasten, and by the connection of key axle, in spool loam cake and the upper valve core spring is arranged, push rod and lower valve core are connected and fixed, the push rod upper end contacts with the bottom end of upper valve core, the bottom end of upper valve core is an angled end-face, and the angle of angled end-face and transverse section is 5-40 °

The beneficial effects of the utility model are: the flow accommodation of work is big, can reach 5 times to minimum working flow; Synchronization error (being fixed error) can be finely tuned, and makes things convenient for the user; Dynamic response has improved 3-5 doubly than existing.

Description of drawings:

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is the A-A sectional view of Fixed differential reducing valve of the present utility model;

Wherein: the 1st, shell, the 2nd, variable valve pocket group, the 3rd, lever, the 4th, push-and-pull spool, the 5th, oil circuit, the 6th, spool loam cake, the 7th, upper valve core, the 8th, push rod, the 9th, lower valve core, the 10th, valve opening, the 11st, spring, the 12nd, key axle, PA are that oil circuit A advances or outlet, PB are that oil circuit B advances or exports.

Embodiment:

This valve is divided into once fixed poor throttling part and secondary variable restrictor part, once fixed poor throttling part is made up of spool loam cake, upper valve core, push rod, lower valve core, spring, once fixed poor throttling part is divided into the micro-adjusting mechanism and the Fixed differential reducing valve of a restriction again, secondary variable restrictor part is made up of variable valve pocket group, lever, push-and-pull spool, and secondary variable restrictor part can be divided into variable valve pocket group and lever enlarger again.As shown in Figure 1.

Fixed differential reducing valve is that guarantee can both be for secondary spool two ends provide fixing pressure reduction under the situation of the indefinite flow of input, and micro-adjusting mechanism is that the spool by angled end-face rotates the machining error of adjusting a throttle orifice.

The variable valve pocket of second throttle is synchronous (difference of dividing afflux) when adjusting the executive component load and changing, leverage is the ability that overcomes adjustment (moving) resistance according to the amplification principle raising secondary spool of lever, and amplification multiple is exactly the multiple that synchronization accuracy improves.

The working procedure of this valve is:

When pressure oil is entered by the P mouth, be divided into two by a restriction, pressure reduces a fixed value Δ P, enter the secondary valve pocket by the two ends oil duct, the commutation core separates to two ends, makes the secondary spool be in the branch stream mode, the pressure influence that the lever spool also bears the two ends oil duct simultaneously.When input flow rate increased, a throttle orifice pressure drop improved; Make on the spring pressurized and move, open a big choke area, pressure is constant again, and when input flow rate reduced, spring moved down on Δ P value, reduced orifice size one time.When two choke areas are inconsistent, rotate one time spool, make two choke areas identical.Oil is divided into two through a restriction, enter the secondary valve pocket by oil duct, enter executive component from PA, PB mouth, when the rising of PB mouth pressure (being that this executive component load value improves), pressure oil rises second throttle valve pocket right end chamber chamber pressure thereupon and the secondary spool is moved left, close PB second throttle mouth, open big PA second throttle open area, makes left chamber's pressure equal right chamber pressure, this moment, PA mouth and PB mouth flow equated, reached synchronous purpose.Simultaneously want overcome friction in the secondary spool moving process, the resistances such as power that surge, because that secondary spool end hydraulic pressure is adjusted power is limited, and the moving resistance of actual spool adjusts power much larger than spool, improved the response capability of varying load value (being centering capacity).During afflux work, job order is opposite, and principle is identical.

Claims

1, a kind of highi degree of accuracy is divided combiner valve, form by shell, variable valve pocket group, spool loam cake, upper valve core, spring, oil circuit, it is characterized in that: on variable valve pocket group switching centre position, be fixed with the lever that to swing, the S end of lever is hinged on the center portion of push-and-pull spool, and two cylinder bodies at push-and-pull spool place communicate with two oil circuits respectively; The spool loam cake of a throttling Fixed differential reducing valve and upper valve core fasten, and by the connection of key axle, in spool loam cake and the upper valve core spring is arranged, push rod and lower valve core are connected and fixed, the push rod upper end contacts with the bottom end of upper valve core, the bottom end of upper valve core is an angled end-face, and the angle of angled end-face and transverse section is 5-40 °.