CN202326493U

CN202326493U - Oil supplementation buffer valve

Info

Publication number: CN202326493U
Application number: CN201120460766XU
Authority: CN
Inventors: 王华忠; 王华良; 杨军
Original assignee: XIANGYANG ZHONGLIANG ENGINEERING MACHINERY CO LTD
Current assignee: XIANGYANG ZHONGLIANG ENGINEERING MACHINERY CO LTD
Priority date: 2011-11-19
Filing date: 2011-11-19
Publication date: 2012-07-11
Anticipated expiration: 2021-11-19

Abstract

The utility model discloses an oil supplementation buffer valve which is mainly used for a full-hydraulic backhoe loader. The valve is characterized in that a left end cover and a right end cover are arranged at two ends of a cylinder; a piston is arranged in the middle of the cylinder; a left spring and a right spring are arranged between the left end cover and the piston and between the right end cover and the piston respectively; a gland is arranged on the end face of the left end cover; a sealing gasket is arranged between the left end cover and the cylinder; a combined sealing gasket and a supporting ring are arranged between the piston and the cylinder; a traveling buffer oil supplementation valve is arranged between a gear pump and a manual reversing valve; pressure of hydraulic oil in a high-pressure cavity is absorbed according to relative change of the volumes of accommodating cavities, and oil is supplemented to an absorption cavity; and the springs in the two accommodating cavities can absorb inertial kinetic energy of a vehicle and hydraulic impact of a hydraulic system. The oil supplementation buffer valve has a simple structure, is easy to manufacture and low in cost and has an obvious buffer oil supplementation effect; a phenomenon of fore-and-aft shake caused by starting-stopping and stopping-starting of equipment can be avoided effectively; and phenomena of breakage of a half shaft, tooth impact of a differential mechanism gear, breakage of an output shaft of a traveling hydraulic motor, reduction of climbing capacity, powerless traveling and the like are avoided.

Description

The repairing trimmer valve

Technical field

The utility model relates to the hydraulic control valve technical field, is a kind of repairing trimmer valve that is used on the hydraulic excavating loader specifically.

Background technique

Oil hydraulic motor is a kind of liquid can be converted into the device of mechanical energy, and it is that the pressure oil that utilizes oil hydraulic pump to pump makes hydraulic motor output shaft rotation and then driving wheel forward-reverse.In order to make driving have the self-actuating brake function, the control unit of this hydraulic moving motor has been selected the hand-operated direction valve of meta self-locking function for use.As shown in Figure 3: as selector valve to be in when upper when moving hand-operated direction valve 14; Get into the left chamber of hydraulic moving motor 15 from the hydraulic oil of gear pump 12 outputs; And flow back to hydraulic oil container 11 through oil return filter cleaner 13 from right chamber, this moment, hydraulic moving motor 15 powered vehicle that turns clockwise was retreated; When moving hand-operated direction valve 14 selector valve is in when the next; To get into the right chamber of hydraulic moving motor 15 from the hydraulic oil of gear pump 12 outputs; And flowing back to hydraulic oil container 11 through oil return filter cleaner 13 from left chamber, hydraulic moving motor 15 was rotated counterclockwise powered vehicle and advanced this moment; When moving hand-operated direction valve 14 and make selector valve be in meta, will directly flow back to hydraulic oil container 11 from the hydraulic oil of gear pump 12 outputs, this moment, hydraulic moving motor 15 did not both have the oil-feed can not oil return, and vehicle stops.If vehicle excessive velocities from the state of rest to the motion state will make entire equipment shake; If same vehicle also can make equipment that violent front and back shake takes place under action of inertia from the unexpected convert to static state of motion state.

In the real work; All-hydraulic backhoe type loader-digger adopts the fluid motor-driven walking; Equipment whole vehicle body when starting--stop, stopping---startup is shaken before and after all can taking place; Shake before and after the entire equipment meeting when the oil circuit of walking oil hydraulic motor is turned off; The front and back shake also can take place because of starting suddenly in equipment when oil circuit is connected simultaneously, and the phenomenon that semiaxis fractures, differential gear is beaten tooth often takes place, and hydraulic motor output shaft fractures with walking, grade ability descends, walking is unable.Main cause is that motor can stop operating after the oil circuit of oil hydraulic motor was cut off, but because the effect of inertia of equipment makes traveller that the kinetic energy of a preshoot arranged, when this kinetic energy can not get discharging, will the weak element of whole traveller be damaged.

Because the hydraulic moving motor has bigger output torque; If the moment excessive velocities starting will inevitably be brought no small impact to equipment; When stopping Parking because the stall of hydraulic moving motor, but the kinetic energy of vehicle its preshoot under effect of inertia will finally be delivered on the output shaft of hydraulic moving motor through drive part.The parts the weakest according to wooden barrel effect drive part will be damaged; All can receive from unexpected startup from the semiaxis of ransaxle, differential gear, hydraulic moving motor output shaft to the oil hydraulic motor internal gear and stop the impact of Parking suddenly.

As shown in Figure 4, unexpected switch operation itself damages also can for the hydraulic pressure running motor.When hand-operated direction valve commutates to meta suddenly; The oil circuit of hydraulic moving motor is completely severed; The hydraulic moving motor will stop operating; But the gear that will drive the hydraulic moving motor from the inertia kinetic energy of vehicle by force rotates, this moment the oil suction chamber 17 of hydraulic moving motor will form a vacuum (because of oil-feed by by), will form partial high pressure (oil circuit can't be discharged by fluid) and go out oil pocket 18.This vacuum just is called on hydraulic pressure inhales sky, and it can produce cavitation phenomenon, and the seriously wearing and tearing of aggravation oil hydraulic motor of cavitation erosion cause the reduction of hydraulic moving moyor, and the internal leakage aggravation finally can make the walking of hydraulic moving motor unable; Simultaneously the partial high pressure of fuel-displaced side can be destroyed the sealing configuration of hydraulic moving motor, and its result also is the internal leakage of aggravation hydraulic moving motor, the car load grade ability is descended, walking is unable even can't walk.

Summary of the invention

The deficiency of shake before and after the entire equipment meeting when being turned off for overcoming oil circuit that existing oil hydraulic motor hydraulic control system caused,

The goal of the invention of the utility model is to provide a kind of repairing trimmer valve, realizing vehicle launch, the buffering that stops, and carry out the purpose that repairing, release hydraulic moving motor go out the high pressure of oil pocket can for the oil suction chamber of hydraulic pressure running motor.

For realizing above-mentioned purpose; Left end cap, right end cap are equipped with in the two ends of the cylinder barrel of the utility model, and the middle part of cylinder barrel is provided with piston, and left spring is contained between left end cap and the piston; Right spring is contained between right end cap and the piston; The end face of left end cap is equipped with gland, between left end cap and the cylinder barrel seal ring is housed, and combined seal ring and support ring are housed between piston and the cylinder barrel.

The utility model comprises the cavity volume that two volumes change relatively, and the centre separates with piston, and Sealing is housed on the piston, prevents two chamber hydraulic oil intercommunications, and in two airtight cavitys, has respectively adorned a spring.Walking slow supply oil valve is contained between gear pump and hand-operated direction valve; Can absorb the pressure of hyperbaric chamber hydraulic oil through the relative variation of cavity volume and give and inhale the cavity repairing, the spring in two cavity volumes can absorb from the inertia kinetic energy of vehicle with from the hydraulic shock of hydraulic system.

The utility model is compared with prior art, and is simple in structure, makes easily, and with low cost, the slow supply oil effect is obvious,

The front and back shake that the equipment that can effectively prevent is produced when starting--stop, stopping---startup; Stop phenomenons such as semiaxis fractures, differential gear is beaten tooth and the walking hydraulic motor output shaft fractures, grade ability descends, walking is unable, be highly suitable for all-hydraulic backhoe type loader-digger.

Description of drawings

Fig. 1 is the structural representation sketch of the utility model;

Fig. 2 is the application simplified schematic diagram of the utility model;

Fig. 3 uses simplified schematic diagram for existing technology;

Fig. 4 is that the hydraulic moving motor 15 of Fig. 3 is inhaled empty schematic representation.

Embodiment

As shown in Figure 1; Left end cap 2, right end cap 10 are equipped with in the two ends of the cylinder barrel 5 of the utility model, and the middle part of cylinder barrel 5 is provided with piston 6, and left spring 4 is contained between left end cap 2 and the piston 6; Right spring 9 is contained between right end cap 10 and the piston 6; The end face of left end cap 2 is equipped with gland 1, between left end cap 2 and the cylinder barrel 5 seal ring 3 is housed, and combined seal ring 7 and support ring 8 are housed between piston 6 and the cylinder barrel 5.

As shown in Figure 2, the utility model walking slow supply oil valve 16 is connected in parallel between hydraulic moving motor 15 and the hand-operated direction valve 14.

When moving hand-operated direction valve 14 selector valve is in when upper; To get into the left chamber of hydraulic moving motor 15 from the hydraulic oil of gear pump 12 outputs; And flow out from the right chamber of hydraulic moving motor 15 and get back to hydraulic oil container 11; Meanwhile; Charge into fluid also can for the left chamber of repairing trimmer valve 16 from the pressure oil that hand-operated direction valve 14 flows out, because this process will overcome the spring force in repairing trimmer valve 16 right chambeies the pressure of the pressure oil that gets into hydraulic moving motor 15 left chambeies temporarily decayed, vehicle launch will become steady because of this delaying in a flash; Make selector valve be in that the startup of vehicle also can become very steady when the next with moving hand-operated direction valve 14; When moving hand-operated direction valve 14 and make selector valve be in meta; The oil circuit of hydraulic moving motor 15 is cut off; Equipment can produce the kinetic energy of a preshoot because of effect of inertia; This kinetic energy finally is delivered on the output shaft of hydraulic moving motor 15 through driving mechanism, and at this moment the oil suction chamber 17 of hydraulic moving motor 15 needs repairing, needs to discharge and go out the high pressure that oil pocket 18 forms.Because two cavity volumes of the utility model repairing trimmer valve 16 communicate with the turnover oil pocket of hydraulic moving motor 15 respectively.Slow supply oil valve 16 inner pistons 6 move so the pressure oil that goes out oil pocket 18 of hydraulic moving motor 15 can promote to walk; The fluid that this process just in time is full of repairing trimmer valve 16 in advance enters the oil suction chamber 17 of hydraulic moving motor 15, has avoided the hydraulic moving motor to produce and has inhaled sky; Again because repairing trimmer valve 16 has adopted the design of symplex structure; So no matter vehicle advances stop or retreating stopping; The utility model repairing trimmer valve 16 can both discharge the pressure of hyperbaric chamber, gives simultaneously and inhales the cavity repairing, prevents that hydraulic moving motor 15 from producing cavitation erosion because of inhaling sky; Finally play protection hydraulic moving motor 15, and prolonged the effect in 15 working lifes of hydraulic moving motor.Above-mentioned just one fills a process of putting will absorb because of the inertia kinetic energy that stops Parking from vehicle fully, thereby also avoid the twisting off of axle half shafts, differential mechanism to beat tooth, and phenomenon such as the walking hydraulic motor output shaft fractures, grade ability descends, walking is unable.

Claims

1. repairing trimmer valve; It is characterized in that: left end cap (2), right end cap (10) are equipped with in the two ends of cylinder barrel (5); The middle part of cylinder barrel (5) is provided with piston (6); Left spring (4) is contained between left end cap (2) and the piston (6), and right spring (9) is contained between right end cap (10) and the piston (6).

2. repairing trimmer valve according to claim 1 is characterized in that: the end face of left end cap (2) is equipped with gland (1).

3. repairing trimmer valve according to claim 1 is characterized in that: between left end cap (2) and the cylinder barrel (5) seal ring (3) is housed.

4. repairing trimmer valve according to claim 1 is characterized in that: combined seal ring (7) and support ring (8) are housed between piston (6) and the cylinder barrel (5).