CN2129188Y - Multifunction servo-controller of gas-liquid hammer - Google Patents

Abstract

The utility model relates to a multifunction servo-controller of a gas-liquid hammer, which belongs to the operating device of a hammer in forging equipment, adopts a servo mechanism to directly control the valve core of a multifunctional slide valve. The movement position and the speed of the valve core forms a coincidence relationship with the action of an operating handle. The multifunction can be realized through the functions of the slide valve to realize the position control of a hammer head and to accurately adjust striking energy. The utility model can complete all control requirements of hammer forging, and combines striking, carrying away, emergency stop, double moulding, unloading, etc., solves the problem that the previous gas-liquid hammer adopts multiple valves and multiple oil passages to control and influence the striking frequency and the reliability, and has the advantage of flexible, convenient, and safe control.

Description

Multifunction servo-controller of gas-liquid hammer

The utility model belongs to the hydraulic control unit in the forging equipment, is used for the manipulation control of gas-liquid hammer.

In number of patent application was 87101725.3 patent application, its control system mainly adopted a servo valve as control valve, controls a fast fuel outlet valve.It can not control the quick release valve spool position, and the quick release valve inner spring easily causes system's heating, and its off-load has adopted unloader to control.

In the patent application of application number 87102940, control system has adopted the hydraulically operated valve group, its strike, carry out, in stop, off-load adopts combination hydraulic to handle cone valve control.But it has adopted a special control oil circuit to mould, so there are two handlebars in system, manipulation inconvenience.

The utility model proposes a kind of gas-liquid hammer multifunctional servo manipulation device, integrate the whole operating functions of forging hammer, solved existing air-flow and hammered the contradiction that adopts the control of many valves heavy wool road and influence striking frequency and reliability into shape.

To achieve these goals, technical solution of the present utility model is: by multifunction valve, and on its end cap fitting machine liquid servo control mechanism, directly control the spool of multifunction valve.Valve body ［ 1 ］ is loaded in the casing with hammer stem chamber ［ 10 ］, and its inside links to each other with passage.

Multifunction valve by valve body ［ 1 ］, be contained in the inner chamber of valve body ［ 1 ］, and the spool that can in inner chamber, move around ［ 2 ］, be fixed on valve body ［ 1 ］ two ends and the sealing ring ［ 12 ］ that constitutes between the inwall of end cap ［ 11 ］, end cap ［ 11 ］ and valve body ［ 1 ］ of body cavity is formed.Valve body ［ 1 ］ has been opened four hydraulic fluid port: T successively along the side of axis direction ₁, P, A, T ₂, for reducing size and increase circulation area, each hydraulic fluid port on the valve body ［ 1 ］ for the perpendicular cross section of valve body ［ 1 ］ axis on opened 4～10 equal and opposite in directions, and equally distributed oilhole.End cap ［ 11 ］ links to each other with valve body ［ 1 ］ two ends with bolt, seals by sealing ring ［ 12 ］ on valve body ［ 1 ］ inwall contact-making surface, and porose so that piston rod ［ 5 ］ passes through the end cap of installation oil cylinder at the center.Spool ［ 2 ］ is made of the shaft shoulder and separately five sections of axle shin, moves the annular seal space that valve body ［ 1 ］ end cap ［ 11 ］, sealing ring ［ 12 ］ are constituted in, and when spool ［ 2 ］ during at meta, the A mouth seals, T ₁Mouth communicates with the P mouth; When spool ［ 2 ］ during in the limit on the left position, A mouth and T ₂Communicate T ₁Communicate with the P mouth; When spool ［ 2 ］ during in the limit on the right-right-hand limit position, the P mouth communicates T with the A mouth ₁, T ₂Close.Mechanical hydraulic servo mechanism is made up of servo valve ［ 3 ］, feedback rod ［ 4 ］, piston rod ［ 5 ］, cylinder tube ［ 6 ］, oil cylinder protecgulum ［ 13 ］.The two ends of cylinder tube ［ 6 ］ are form of flanges, and the one end directly is fixed on the end cap ［ 11 ］ of valve body ［ 1 ］, and its other end is fixed with oil cylinder protecgulum ［ 13 ］, and the upper end, side of cylinder tube ［ 6 ］ has hydraulic fluid port.Be positioned at cylinder tube ［ 6 ］, the end that the middle part has a piston rod ［ 5 ］ of piston passes the end cap ［ 11 ］ of valve body ［ 1 ］, extend in the valve body ［ 1 ］, fixedly connected with spool ［ 2 ］ end face by coupling sleeve ［ 7 ］, its other end passes and stretches out oil cylinder protecgulum ［ 13 ］, and this end is connected by the end of slide hinge with feedback rod ［ 4 ］.Is connected with the spool of servo valve ［ 3 ］ with hinge on the other end of feedback rod ［ 4 ］, and the hinge center coincides with center spool, make steering force that the B point transmits have only axial and do not have warp-wise power, the generation of minimizing clamping force at the C point.Servo valve ［ 3 ］ is installed in the same vertical plane with multifunction valve, and the BC of feedback rod ［ 4 ］ and the length ratio of CD directly influence feedback ratio and amplification coefficient.The steering force of mechanical hydraulic servo mechanism transmits by the end B point of feedback rod ［ 4 ］.Like this, multifunction valve spool ［ 2 ］ is directly controlled, just can be realized the global function control of forging hammer by multifunction valve by mechanical hydraulic servo mechanism.

Suppose when spool ［ 2 ］, piston rod ［ 5 ］, servo valve ［ 3 ］ and all be in meta.When needs hit, need only handle the B point fast and move, just the spool of servo valve ［ 3 ］ moves to extreme position, makes piston rod ［ 5 ］ fast moving, thereby drives (or drive) spool ［ 2 ］ fast moving, makes tap hole T ₂Open entirely, sap cavity pressure oil leaks into fuel tank ［ 8 ］ fast under the hammer stem, and tup is finished the strike process hitting under the high speed under gravity and the epicoele gas pressure.Simultaneously, in piston rod ［ 5 ］ moving process, gradually the spool of servo valve ［ 3 ］ is driven meta again, close servo valve ［ 3 ］ valve port, make spool ［ 2 ］ be stopped at extreme position by feedback rod ［ 4 ］; When the needs tup gos up fast, need only oppositely operate the B point fast, make the spool of servo valve ［ 3 ］ move to extreme position, make piston rod ［ 5 ］ and spool ［ 2 ］ oppositely move to extreme position, open oil-in A entirely, make pressure oil P ₁Go into the A mouth from P bore valve pocket, enter hammer stem F sap cavity, realize that tup gos up.In spool ［ 2 ］ moving process, the valve port of servo valve ［ 3 ］ is to close gradually, reduces and impacts.In strike and lifting process, can make the B point get back to meta at any time, close working chamber A mouth, can realize anxious stopping.

When needs during to mould, can handle the B point, working chamber A mouth opening amount can be controlled in the position of control piston bar ［ 5 ］ and spool ［ 2 ］, tup is slowly descended, in the decline process, need only make manipulation B point get back to meta, can close the A mouth, make the tup stop motion, reach purpose mould.In like manner, control the opening amount of oil-in, just can control the rise speed of tup.

In the course of the work, the B point is handled got back to meta, can close working chamber A mouth, reach tup and be parked in desired position, thereby reach the purpose of regulated at will blow energy; When tup gos up when too high, tup is slowly descended, reduce the tup height, also can reach the requirement of regulating its blow energy.

When strike process and tup are unsettled, require system unloaded, can realize with the slide valve function of valve body ［ 1 ］ and spool ［ 2 ］, simple in structure.

Accompanying drawing is a structure installation diagram of the present utility model.

Valve core of the spool valve in the accompanying drawing ［ 2 ］ is directly controlled by mechanical hydraulic servo mechanism, and the position of spool ［ 2 ］ becomes corresponding relation with the position of handling some B with translational speed with translational speed.Therefore, the position of spool ［ 2 ］ just can be controlled in the position of B, thereby the opening amount of control valve port A has promptly been controlled the tup translational speed.Steering force is little, flexible, directly perceived.

In the accompanying drawings, ［ 1 ］ be that valve body, ［ 2 ］ are servo valve for spool, ［ 3 ］, ［ 4 ］ are that feedback rod, ［ 5 ］ are that coupling sleeve, ［ 8 ］ are that sealing ring, ［ 13 ］ be oil cylinder protecgulum ［ 13 ］ for hammer stem chamber, ［ 11 ］ for end cap, ［ 12 ］ for connecting pipe, ［ 10 ］ for fuel tank, ［ 9 ］ for piston rod, ［ 6 ］ for cylinder tube, ［ 7 ］.A is that valve body ［ 1 ］ is gone up the work accent, links to each other with sap cavity under the hammer by pipeline, and P is the oil-feed accent, F ₁Be off-load mouth, T ₂Be fast tap hole, directly communicate with fuel tank ［ 8 ］.The B point is for handling the input point of control, and the D point is the pin joint of feedback rod ［ 4 ］ piston ［ 5 ］, and the C point is the tie point of feedback rod ［ 4 ］ and servo valve ［ 3 ］.P ₁Be working connection pressure oil, P ₂Be controlled pressure oil.

Claims (3)

1, a kind of gas-liquid hammer multifunctional servo manipulation device, comprise fuel tank [8], connect oil pipe [9], hammer stem chamber [10], pressure oil P1, P2 is characterized in that this device is made up of multifunction valve and the mechanical hydraulic servo mechanism that is installed on the multifunction valve end cap, gas-liquid hammer run action is by handling mechanical hydraulic servo mechanism, make spool [2] shaft shoulder and the axle shin of the hydraulic fluid port on the valve body [1] cooperate realization, valve body [1] is loaded in the casing with the hammer stem chamber, and its inside is linked to each other by passage.

2, gas-liquid hammer multifunctional servo manipulation device according to claim 1, it is characterized in that multifunction valve is by valve body ［ 1 ］, be contained in the inner chamber of valve body ［ 1 ］, and the spool that can in inner chamber, move around ［ 2 ］, be fixed on valve body ［ 1 ］ two ends and constitute the end cap ［ 11 ］ of body cavity, the sealing ring ［ 12 ］ between end cap ［ 11 ］ and valve body ［ 1 ］ inwall is formed; Side along valve body ［ 1 ］ horizontal direction has been opened 4 hydraulic fluid port T1, P, A1, T2 successively, in the perpendicular same cross section of each hydraulic fluid port of valve body ［ 1 ］ and valve body center line, opened 4～10 equal and opposite in directions and equally distributed oilhole, spool ［ 2 ］ is made up of the shaft shoulder and alternate five sections of axle shin.

3, gas-liquid hammer multifunctional servo manipulation device according to claim 1, cylinder tube ［ 6 ］ one ends that it is characterized in that mechanical hydraulic servo mechanism are fixed on the end cap ［ 11 ］ of valve body ［ 1 ］, its other end is fixed with oil cylinder protecgulum ［ 13 ］, and the end on the side of cylinder tube ［ 6 ］ has two hydraulic fluid ports; Be positioned at cylinder tube ［ 6 ］, the end that its middle part has the piston rod ［ 5 ］ of piston passes the end cap ［ 11 ］ of valve body ［ 1 ］, extend into valve body ［ 1 ］ inside, be fixedly connected by coupling sleeve ［ 7 ］ and spool ［ 2 ］ end face, its other end stretches out oil cylinder protecgulum ［ 13 ］, this end is connected by the end of slide hinge with feedback rod ［ 4 ］, be connected with the spool of servo valve ［ 3 ］ with hinge on the other end of feedback rod ［ 4 ］, and the hinge center overlaps with center spool, the steering force of mechanical hydraulic servo mechanism transmits pressure oil P by the end B of feedback rod ［ 4 ］ ₂By servo valve ［ 3 ］, an one pressure oil output links to each other with a hydraulic fluid port of cylinder tube ［ 6 ］, and another pressure oil output links to each other with another hydraulic fluid port of cylinder tube ［ 6 ］.