CN201068906Y

CN201068906Y - Swivel plate type hydraulic change-over valve

Info

Publication number: CN201068906Y
Application number: CNU2007200350547U
Authority: CN
Inventors: 蔡民健
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-12
Filing date: 2007-03-12
Publication date: 2008-06-04
Anticipated expiration: 2017-03-12

Abstract

The utility model relates to a carousel hydraulic reversing valve, which consists of a valve body, a discal valve core and an end cover. The valve body is provided with an inlet hole. The discal valve core is provided with through inlet holes in axle direction and U-shaped backflow holes, and one through inlet hole and one U-shaped backflow holes become a pair, and the valve core is provided with one pair or a plurality of pairs. The end cover is provided with inlet holes, backflow holes and central overflow holes, the positions of which are the same as that on the valve core. When the pressure fluid enters into a valve cavity, a motor drives the valve core to rotate, the inlet holes on the valve core are jointed with the inlet holes on the end cover; the U-shaped backflow holes on the valve core are jointed with the backflow holes and the inlet holes on the end cover; and the central end of the U-shaped backflow holes are always jointed with the central overflow holes. The pressure fluid enters into the A cavity of the oil cylinder by the jointed inlet holes to drive the piston to move to the B cavity, and fluid in the B cavity flows back to the original place. the process is repeated again and again, every time hole pairs are coincident, a pulse is generated. The frequency of the pulse can be speeded up by increasing the number of the hole pairs or by speeding up the rotating, and the amplitude of the pulse can be increased by widening hole diameters or by extending the coinciding time of the hole pairs.

Description

The rotation plate type hydraulicdirectional control valve

Technical field:

The utility model relates to a kind of hydraulic control valve; Particularly may command liquid stream makes it to produce the rotation plate type hydraulicdirectional control valve of regular pulse.

Background technique:

The vibration source of general vibrating machine mainly is by the eccentric shaft rotation, produces uneven centrifugal force and makes it to produce exciting.Electric and magnetic oscillation is then by the electromagnetic field generation exciting that changes.Both subject matter is that energy consumption is big, cost is high, and rapid wear of vibration exciter own and safety coefficient are low.

Summary of the invention:

The purpose of this utility model provides a kind of low energy consumption, high efficiency, safe and reliable rotation plate type hydraulicdirectional control valve can produce impulse oscillation by the hydraulic system of its control, and can frequency modulation, amplitude modulation.This impulse oscillation can be the impulse oscillation of balance, also can be unbalanced impulse oscillation.Equalizing pulse when vibration executive component does not move, and executive component can be stretched or contract mobile during uneven impulse oscillation.

The utility model rotation plate type hydraulicdirectional control valve is characterized in that forming by valve body, plate-like spool with respect to the end cap of plate-like spool.One ostium is arranged on the valve body, be furnished with axially straight-through flow-in hole and U type return port on the plate-like spool, a straight-through flow-in hole and a U type return port are a pair of.Have one or more pairs ofly on the plate-like spool, one of them clear opening is a flow-in hole, and another U-shaped hole is a return port, U-shaped hole one end and straight-through flow-in hole symmetry, and the other end is at the plate-like center spool.Be furnished with flow-in hole, return port and center overflow hole with plate-like spool same position on the end cap, its center hole is an overflow hole, two first for advancing return port, one is back into discharge orifice.Plate-like spool and end-cover axle are to docking, and it is right to form slide-valve, both relative rotary motion.When pressure fluid enters valve pocket by the ostium on the valve body, motor drives the rotation of plate-like spool, straight-through flow-in hole on the spool docks with the return port coincidence of advancing on the end cap, overlapping back into discharge orifice on U type return port and the end cap docked, and the center-side in U-shaped hole is in all the time with center overflow hole on the end cap and overlaps mated condition.At this moment pressure flow overlaps the flow-in hole of butt joint and the A chamber that external pipeline enters executive component (oil cylinder) by two, promoting piston moves to the B chamber, liquid stream in the B chamber then is extruded, and is back to the seedbed by external pipeline and two return port and center overflow holes that overlap butt joint.The spool rotation goes round and begins again, and the hole once just produces pulsatile once to every coincidence.By increasing the right quantity in hole or accelerating the spool rotating speed pulse frequency is accelerated.By adding large aperture or elongated pore to then increasing pulse amplitude the time of coincidence.

Adopt the hydraulic system of the rotation plate type hydraulicdirectional control valve of said structure, can produce the impulse oscillation source of frequency-adjustable amplitude modulation.This valve need to be specially adapted to the work system of the high strong vibration of high frequency, also is applicable to the work system that needs vibration feed and vibration to shrink back, and also is applicable to the work system of low frequency reciprocating action.

Description of drawings:

Figure (1) is the B-B sectional drawing of the utility model rotation plate type hydraulicdirectional control valve.

Figure (2) is the front view of the utility model rotation plate type hydraulicdirectional control valve end cap.

Figure (3) is the front view of the utility model rotation plate type valve core of hydraulic reversing valve.

As shown in the figure, this valve is made up of valve body 1, plate-like spool 2 and end cap 3, have on the valve body and have axially straight-through flow-in hole 6 and U-shaped hole 10 and 10 ' on ostium 4, the plate-like spool, have on the end cap with the plate-like spool on same position advance return port 5, back into discharge orifice 9 center overflow holes 7, also have valve pocket 11 and live axle 8.

Embodiment:

In the present embodiment, when external pressure fluid entered valve pocket 11 by ostium 4, external motor driven plate-like spool 2 began rotation; Go to shown in figure (1) that the straight-through flow-in hole 6 on the spool docks with return port 5 coincidences of advancing on the end cap during position; Overlapping back into discharge orifice 9 on the U type return port 10 on the spool and the end cap docked; And U type return port 10 ' is in all the time with center overflow hole 7 on the end cap and overlaps mated condition.At this moment whole system is in open-circuit condition.Pressure flow is by straight-through flow-in hole 6, advance return port 5 and external pipeline and enter executive component (oil cylinder) A chamber, promote piston and move to the B chamber, the fluid in the B chamber enters back into discharge orifice 9 by external pipeline, U type return port 10 is back to the seedbed by U type return port 10 ' and center overflow hole 7 again.When plate-like spool 2 continues to rotate to an angle, all valve openings that overlap butt joint break away from mutually.This moment, whole system was in closed circuit state.Executive component just is in halted state.When plate-like spool 2 rotated to and spends with the relative position 180 of opening a way last time, whole system was in open-circuit condition again, different is this moment straight-through flow-in hole 6 with dock back into discharge orifice 9 coincidences.U type return port 10 docks with advancing return port 5 coincidences, and so current open circuit is just in time opposite with the flow direction of the pressure flow that open circuit forms last time, so the moving direction of executive component is also opposite with last time.One week of plate-like spool revolution (oil cylinder) just produces a to-and-fro motion like this.Because the fluid that enters in the oil pocket 11 has certain pressure,, can solve sealing problem like this and can compensate the gap that forms by wearing and tearing again automatically so can promote plate-like spool clip end lid.By adjusting the flow of stream, the flow that enters executive component (oil cylinder) A, B, chamber is changed, issuable is equalizing pulse, piston does not move at initial point.Also issuable is uneven impulse oscillation, and piston will move to the little side of flow.

Claims

1. the rotation plate type hydraulicdirectional control valve is characterized in that being made up of valve body, plate-like spool and end cap, be furnished with axially straight-through flow-in hole and U type return port on the plate-like spool, a straight-through flow-in hole and a U type return port are a pair of, have one or more pairs of on the spool, be furnished with flow-in hole, return port and center overflow hole on the end cap with plate-like spool same position, plate-like spool and end-cover axle are to docking, and it is right to form slide-valve, both relative rotary motion.