CN204042110U - For the flow control valve of hydraulic system - Google Patents

Abstract

The utility model relates to a kind of flow control valve for hydraulic system, comprises housing, it is characterized in that: in housing, be provided with spool, spool excircle has V-shaped flow groove, and along media flow direction, the section area of V-shaped flow groove increases gradually; Be provided with metal seat, spool is fixed in metal seat; Housing internal fixtion has valve seat, has endoporus in valve seat, and spool front end is goed deep in endoporus; Flow-rate adjustment spring is had between valve seat and metal seat.The beneficial effects of the utility model are: under the working environment that hydraulic system pressure constantly changes, this valve member can when not by when other auxiliary devices by experiencing the uninterrupted of system pressure change automatic regulating system medium, make stability of flow within the specific limits, the structure of pure machinery is compared to electronic structure, have more simple and reliable, non-maintaining, the advantage of energy long-term stable operation.

Description

For the flow control valve of hydraulic system

Technical field

The utility model relates to a kind of flow control valve for hydraulic system.

Background technique

Flow control valve in hydraulic system is that the local resistance produced by the choke area between regulating spool and valve body and this area carrys out regime flow, and then controls a class valve member of executive component (oil hydraulic cylinder or oil hydraulic motor) movement velocity.Its regulating and controlling mode is divided into manual tune and automatically regulates: the flow rate control valve structure of manual tune is simple, reliably and flow control Be very effective, but should not frequent operation, is applicable to the hydraulic system not requiring flow frequent variations; The flow control valve of automatic adjustment is then the change utilizing the various information (sensor or other modes obtain the change etc. of system pressure, flow, temperature) obtained from system to control valve member choke area or inlet outlet pressure differential, reaches the object of regulable control flow.

Summary of the invention

The purpose of this utility model be to provide a kind of can the flow control valve of automatic stabilisation rate-of flow under conditions of differential pressure to make up the deficiency of prior art.This valve member is applicable to hydraulic system, and size pressure range that is little, lightweight, that be suitable for is large, and discharge stability is better.

The utility model is the technological scheme realizing object:

For the flow control valve of hydraulic system, comprise housing, it is characterized in that:

In housing, be provided with spool, spool excircle have V-shaped flow groove, and along media flow direction, the section area of V-shaped flow groove increases gradually;

Be provided with metal seat, spool is fixed in metal seat;

Housing internal fixtion has valve seat, has endoporus in valve seat, and spool front end is goed deep in endoporus;

Flow-rate adjustment spring is had between valve seat and metal seat.

Further optimization, along media flow direction, the degree of depth of V-shaped flow groove increases gradually.

The beneficial effects of the utility model are: under the working environment that hydraulic system pressure constantly changes, this valve member can when not by when other auxiliary devices by experiencing the uninterrupted of system pressure change automatic regulating system medium, make stability of flow within the specific limits, the structure of pure machinery is compared to electronic structure, have more simple and reliable, non-maintaining, the advantage of energy long-term stable operation.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the schematic three dimensional views of spool.

Fig. 3 is the schematic three dimensional views of metal seat.

Fig. 4 is the combination schematic diagram of spool and metal seat.

Fig. 5 is the sectional drawing of Fig. 4.

Embodiment

embodiment:

In the drawings, 1 for adjustment pad, 2 be valve seat, 3 for Flow-rate adjustment spring, 4 be housing,

5 be spool, 6 be metal seat, 7 for V-shaped flow groove, 8 be endoporus, and 9 is import, and 10 is valve port.

Medium, by the end of the import 9 in metal seat 6 back end circumference and V-shaped flow groove 7, enters the inner chamber of housing 4, then by the front end of V-shaped flow groove 7, enters endoporus 8, flow out from outlet.

Because the front end of spool 5 is deep in endoporus 8, so V-shaped flow groove 7 and endoporus 8 define a valve port 10, and this valve port 10 determines the flow of rear end, our designing points is also aimed at this point.

At ordinary times, metal seat 6 and spool 5 are subject to the active force to the right of Flow-rate adjustment spring 3.Simultaneously, the rear end end face of metal seat 6 is also subject to the hydraulic coupling left of medium, when this hydraulic coupling is enough large, metal seat 6 and spool 5 can be promoted to left movement (overcoming the elastic force of Flow-rate adjustment spring 3) in the endoporus 8 of base 2, the movement travel of spool 5 by Flow-rate adjustment spring 3 elastic force and act on hydraulic coupling in metal seat 6 make a concerted effort decide.

After spool 5 is moved to the left, the length entering endoporus 8 increases, and because V-shaped flow groove 7 cross section of fluid channel area design is for increase gradually along media flow direction, so valve port 10 reduces, makes flow be reduced to setting value.

When the inlet flow rate of medium reduces, hydraulic coupling reduces, and so Flow-rate adjustment spring 3 can order about spool 5 and moves right, and valve port 10 increases, and flow increases to setting value.

So how the inlet flow rate regardless of medium changes, rate of discharge is all the time in the scope of a setting.

In addition, in order to make the amplitude of variation in V-shaped flow road 7 better, the degree of depth of V-shaped flow groove 7 increases along media flow direction by gradually.

Claims (2)

1. for the flow control valve of hydraulic system, comprise housing, it is characterized in that:

In housing, be provided with spool, spool excircle have V-shaped flow groove, and along media flow direction, the section area of V-shaped flow groove increases gradually;

Be provided with metal seat, spool is fixed in metal seat;

Housing internal fixtion has valve seat, has endoporus in valve seat, and spool front end is goed deep in endoporus;

Flow-rate adjustment spring is had between valve seat and metal seat.

2. the flow control valve for hydraulic system according to claim 1, is characterized in that: the degree of depth of V-shaped flow groove increases gradually.