CN206221405U - A kind of simple big flow two-stage pressure overflow control valve - Google Patents

Abstract

A kind of simple big flow two-stage pressure overflow control valve, it includes valve body and the valve element, spring base, spring, check ring, oil inlet, oil discharge outlet, overfall, control port and the connection oil duct that are arranged in valve body；The valve element and spring base are coaxially disposed with oil duct is connected, and the oil inlet, oil discharge outlet, overfall and control port constitute hydraulic pressure transfer passage through connecting oil duct connection and through connecting the valve element in oil duct, spring, spring base, check ring respectively；Control the flow of the adjustable hydraulic oil of decrement of spring；It realizes the setting of the two stage pressures defect poor so as to overcome prior art voltage stabilizing flushing effect using oil circuit control, and overall structure is scientific and reasonable, manufacture craft is simple, install and easy to operate, lightweight, internal galleries are few, flow area is big, with significant economic benefit and social benefit；It is widely used in various hydraulic systems and supports the use, and is particularly suitable for multi-clutch gear hydraulic system and supports the use.

Description

A kind of simple big flow two-stage pressure overflow control valve

Technical field

The utility model is related to the overflow control valve of multi-clutch gear, more particularly to a kind of simple big flow two Stage pressure overflow control valve.

Background technology

The Main Function of overflow control valve is the pressure of hydraulic system to be limited by overflow as a steady state value or is prevented Hydraulic system is overloaded, and its normal work to hydraulic system plays the role of irreplaceable, is very important in hydraulic system Element；Due to the operating efficiency more and more higher of gearbox, to reduce exhaust emission and oil feed pump power consumption, different gears are realized The conversion of high-low pressure, therefore requirement higher is proposed to overflow control valve；And existing overflow control valve is generally pilot-operated type Electromagnetic relief valve, but there are problems that it is following some：1. the damping hole in existing electromagnetic relief valve is often because hydraulic oil is inadequate Clean and block, cause system to go up pressure；2. existing electromagnetic relief valve due to guide's fuel feeding seldom, when the needle-valve of guide System is also resulted in when having abrasion can not go up pressure；3. existing electromagnetic relief valve complex structure, valve body control accuracy is subject to various The influence of factor, and parts are more, manufacture and maintenance cost are higher.

The content of the invention

For above-mentioned situation, the utility model purpose is to provide a kind of simple big flow two-stage pressure overflow control valve, It realizes the setting of the two stage pressures defect poor so as to overcome prior art voltage stabilizing flushing effect using oil circuit control；And Overall structure is scientific and reasonable, and manufacture craft is simple, installs and easy to operate, and lightweight, low cost, internal galleries are few, through-flow face Product is big, and wide market is easy to promote the use of.

To realize above-mentioned task, a kind of simple big flow two-stage pressure overflow controls valve, and it includes valve body and is arranged at Valve element, spring base, spring, check ring, oil inlet, oil discharge outlet, overfall, control port and connection oil duct in valve body；Institute State valve element and spring base to be coaxially disposed with oil duct is connected, the oil inlet, oil discharge outlet, overfall and control port are respectively through connection Oil duct is connected and constitutes hydraulic pressure transfer passage through connecting the valve element in oil duct, spring, spring base, check ring；Control spring The flow of the adjustable hydraulic oil of decrement.

To realize the utility model structure, effect optimization, its further step：One end of the valve element passes through spring catch Circle is connected with oil discharge outlet, oil inlet, and the other end is coaxially connected with spring base through spring.

The two ends of the valve body are provided with cover plate and sealed part is tightly connected.

Connection oil duct in the valve body is step oilhole, the oilhole miner diameter end connection oil inlet and oil discharge outlet, the oil Hole bigger diameter end connection control port.

The spring base is arranged at the bigger diameter end in connection oil duct.

The control port is used for delivery hydraulic pressure oil and push the spring seat is moved in connection oil duct bigger diameter end.

The utility model provides a kind of simple big flow two-stage pressure overflow control valve, and it includes valve body and is arranged at valve Internal valve element, spring base, spring, check ring, oil inlet, oil discharge outlet, overfall, control port and connection oil duct；It is described Valve element and spring base are coaxially disposed with oil duct is connected, and the oil inlet, oil discharge outlet, overfall and control port are respectively through connection oil Road is connected and constitutes hydraulic pressure transfer passage through connecting the valve element in oil duct, spring, spring base, check ring；Control the pressure of spring The technical scheme of the flow of the adjustable hydraulic oil of contracting amount；It realizes that the setting of two stage pressures is existing so as to overcome using oil circuit control There is the poor defect of technology voltage stabilizing flushing effect, and overall structure is scientific and reasonable, and manufacture craft is simple, installs and operation side Just, lightweight, low cost, internal galleries are few, and flow area is big, with significant economic benefit and social benefit.

The utility model beneficial effect produced compared to existing technology：

Ith, the utility model realizes the setting of two stage pressures using oil circuit control, and one can only be set up compared to general overflow valve Its voltage stabilizing flushing effect of individual pressure is good, and control accuracy is high, and operating cost is low；

IIth, the utility model may be contained within valve body using hydraulic pressure transfer passage, be conducive to integrated machine-shaping, make Process is simple is convenient, and equipment making and maintenance cost are low；

IIIth, the utility model overall structure is scientific and reasonable, and manufacture craft is simple, installs and easy to operate, lightweight, cost Low, internal galleries are few, and flow area is big, with significant economic benefit and social benefit.

The utility model is widely used in various hydraulic systems and supports the use, and is particularly suitable for multi-clutch gear hydraulic pressure System support is used.

Below with reference to figure, the utility model is described in further detail.

Brief description of the drawings

The accompanying drawing for constituting the part of the application is used for providing being further understood to of the present utility model, of the present utility model Schematic description and description is used to explain the utility model, does not constitute to improper restriction of the present utility model.

Fig. 1 is overall structure diagram of the present utility model.

In figure：1- valve bodies, 2- spring bases, 3- springs, 4- check rings, 5- valve elements, 6- seals, 7- cover plates, P- oil-feeds Mouthful, T- oil discharge outlets, L- overfalls, K- control ports.

Specific embodiment

Referring to the drawings, the utility model is realized in：A kind of simple big flow two-stage pressure overflow control valve, it is wrapped Valve element 5, spring base 2, spring 3, check ring 4, oil inlet P, oil discharge outlet T, the overflow for including valve body 1 and being arranged in valve body 1 Mouth L, control port K and connection oil duct；The valve element 5 and spring base 2 are coaxially disposed with oil duct is connected, the oil inlet P, oil extraction Mouthful T, overfall L and control port K respectively through connect oil duct connection and through connect the valve element 5 in oil duct, spring 3, spring base 2, Check ring 4 constitutes hydraulic pressure transfer passage；Control the flow of the adjustable hydraulic oil of decrement of spring 3.

As shown in figure 1, one end of valve element 5 is connected through check ring 4 with oil discharge outlet T, oil inlet P in the utility model, The other end is coaxially connected with spring base 2 through spring 3, and the valve element 5 uses cylinder or circle with the connection end of oil discharge outlet T, oil inlet P Cone structure；The two ends of the valve body 1 are provided with cover plate 7 and sealed part 6 is tightly connected, and the connection oil duct in the valve body 1 is platform Stepwise oilhole, oilhole miner diameter end connection oil inlet P and oil discharge outlet T, oilhole bigger diameter end connection control port K；The spring Seat 2 is arranged at the bigger diameter end in connection oil duct, and the control port K is used for delivery hydraulic pressure oil and push the spring seat 2 is in connection oil Moved in road bigger diameter end.

With reference to accompanying drawing, operation principle of the present utility model is：When low pressure clutch works, hydraulic fluid oil enters from oil inlet P Enter, act on valve element 5, overcome spring force to be moved to the left valve element 5, then valve port is opened, hydraulic fluid oil is flow to from oil discharge outlet T Lubrication；When high pressure clutch works, hydraulic fluid oil enters from control port K, and acting on spring base 2 makes it move right, due to The position-limiting action of check ring 4, increases the decrement of spring 3, so as to increase the Opening pressure of valve port, while hydraulic fluid oil is from entering Hydraulic fluid port P enters, and acts on valve element 5, makes valve element 5 overcome the spring force after supercharging to be moved to the left, and then valve port is opened, and makes hydraulic fluid Oil flow to lubrication from oil discharge outlet T；By control port K so as to realize the setting of two stage pressures.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations；It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (6)

1. a kind of simple big flow two-stage pressure overflow control valve, it is characterised in that including valve body (1) and be arranged at valve body (1) Interior valve element (5), spring base (2), spring (3), check ring (4), oil inlet, oil discharge outlet, overfall, control port and connection Oil duct；The valve element (5) and spring base (2) be connected oil duct and be coaxially disposed, the oil inlet, oil discharge outlet, overfall and control Hydraulic fluid port is connected and through connecting valve element (5), spring (3), spring base (2), check ring (4) structure in oil duct through connecting oil duct respectively Into hydraulic pressure transfer passage；The flow of the adjustable hydraulic oil of the decrement of control spring (3).

2. a kind of simple big flow two-stage pressure overflow according to claim 1 controls valve, it is characterised in that the valve element (5) one end is connected through check ring (4) with oil discharge outlet, oil inlet, and the other end connects through spring (3) is coaxial with spring base (2) Connect.

3. a kind of simple big flow two-stage pressure overflow according to claim 1 controls valve, it is characterised in that the valve body (1) two ends are provided with cover plate (7) and sealed part (6) is tightly connected.

4. a kind of simple big flow two-stage pressure overflow according to claim 2 controls valve, it is characterised in that the valve body (1) the connection oil duct in is step oilhole, the oilhole miner diameter end connection oil inlet and oil discharge outlet, oilhole bigger diameter end connection control Liquefaction mouthful.

5. a kind of simple big flow two-stage pressure overflow according to claim 4 controls valve, it is characterised in that the spring Seat (2) is arranged at the bigger diameter end in connection oil duct.

6. a kind of simple big flow two-stage pressure overflow according to claim 5 controls valve, it is characterised in that the control Hydraulic fluid port is used for delivery hydraulic pressure oil and push the spring seat (2) is moved in connection oil duct bigger diameter end.