CN102913382B - A kind of High-reliability hydraulic motor - Google Patents
A kind of High-reliability hydraulic motor Download PDFInfo
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- CN102913382B CN102913382B CN201210429519.2A CN201210429519A CN102913382B CN 102913382 B CN102913382 B CN 102913382B CN 201210429519 A CN201210429519 A CN 201210429519A CN 102913382 B CN102913382 B CN 102913382B
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Abstract
The present invention proposes a kind of High-reliability hydraulic motor, comprise motor end cap and motor casing, motor end cap is arranged on motor casing, motor end cap is provided with hydraulic fluid port A, hydraulic fluid port B, repairing mouth T, reveal hydraulic fluid port dr, first hydraulic fluid port, second hydraulic fluid port, 3rd hydraulic fluid port, 4th hydraulic fluid port, motor casing is provided with the 5th hydraulic fluid port, 6th hydraulic fluid port, also comprise relief valve device A, relief valve device B, damping device and Fill valve device A, Fill valve device B and the braking force control system be arranged on motor casing, relief valve device A, relief valve device B, damping device and Fill valve device A, Fill valve device B and braking force control system communicate with the hydraulic fluid port on motor casing and end cap respectively.Structure of the present invention is simple, oil circuit simplifies, and volume is little, weight saving, and greatly reduces oil circuit and lose and the working efficiency that improve motor, meets the strict demand of modern project machinery hydraulic system to oil hydraulic motor performance, volume and weight thus.
Description
Technical field
The present invention relates to a kind of inclined disc type hydraulic plunger motor, particularly relate to a kind of oil hydraulic motor driving digger revolving used.
Background technique
Oil hydraulic motor is a kind of hydraulic element that fluid pressure can be converted into mechanical energy, the oil hydraulic motor of existing driving digger revolving, because inertia load is larger, normal existence revolution is waved, oil circuit safety valve reliability is not high, heating is serious, special operation condition time oil duct easily produce the problems such as vacuum, these problems have impact on the functional reliability of oil hydraulic motor greatly, and drive the problems such as the oil hydraulic motor place oil-way system ubiquity integration of digger revolving is not high, complex structure, volume are large and heavy at present.
Summary of the invention
Object of the present invention proposes a kind of High-reliability hydraulic motor exactly, the present invention is the function modules such as Fill valve device, relief valve device, delay braking control gear at original oil hydraulic motor basis upper set, effective prevention and the various problems limited in existing driving hydraulic shovel rotary system existing for oil hydraulic motor, thus improve the functional reliability of oil hydraulic motor in this system.The present invention can while high reliability function in realization, integration and optimization process has been carried out to structure, thus achieve the feature that structure is simple, oil circuit simplifies, therefore while realizing volume reduction, weight loss effect, greatly reduce oil circuit to lose and the working efficiency that improve motor, meet the strict demand of modern project machinery hydraulic system to oil hydraulic motor performance, volume and weight thus.
Technical solution of the present invention:
A kind of High-reliability hydraulic motor, comprise motor end cap and motor casing, described motor end cap is arranged on motor casing, and its special way is:
Described motor end cap is provided with hydraulic fluid port A, hydraulic fluid port B, repairing mouth T, reveals hydraulic fluid port dr, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port, relief valve device A, relief valve device B, damping device and Fill valve device A and Fill valve device B, described motor casing is provided with the 5th hydraulic fluid port, the 6th hydraulic fluid port and braking force control system
Described hydraulic fluid port A is communicated with the entrance of relief valve device A, described hydraulic fluid port B is communicated with the entrance of relief valve device B, described repairing mouth T, the equal connected tank of leakage hydraulic fluid port dr, and hydraulic fluid port A is communicated with repairing mouth T by Fill valve device A, hydraulic fluid port B is communicated with repairing mouth T by Fill valve device B
Described first hydraulic fluid port and the second hydraulic fluid port communicate with hydraulic fluid port A, and described 3rd hydraulic fluid port and the 4th hydraulic fluid port communicate with hydraulic fluid port B, and four actuator ports of described damping device communicate with the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port respectively,
Described 5th hydraulic fluid port and the 6th hydraulic fluid port communicate with two actuator ports of motor braking force control system respectively.
Above-mentioned relief valve device A comprises main valve housing 103, is fixed on the valve seat 101 of main valve housing 103 one end, the main valve plug 102 be arranged in main valve housing 103, be sleeved on spring 104 on main valve plug 102 and middle valve pocket 106 and be fixed on the screw plug 112 of middle valve pocket 106 one end
In the spring chamber 128 that described spring 104 is formed between main valve housing 103 and main valve plug 102, one end of described spring 104 is fixed on main valve plug 102, and described spring 104 the other end acts on middle valve pocket 106 by pad 105,
Described main valve housing 103 is provided with control oil and imports and exports 121, one end of described control oil import and export 121 is communicated with fuel tank, and the described the other end controlling oil import and export 121 is communicated with spring chamber 128,
Be provided with oil channel hole 120 in described main valve plug, described main valve plug 102 contacts with valve seat 101 linear sealing, and described middle valve pocket 106 is fixedly connected with main valve housing 103,
Also comprise damper assembly, spool 109 and valve core housing 110,
Described damper assembly is arranged in main valve plug 102, described damper assembly comprises the damping plug mounting hole be arranged in main valve plug 102 and the damping plug be fixed in damping plug mounting hole, one end of described damping plug mounting hole is towards valve seat 101, the other end of described damping plug mounting hole is towards oil channel hole 120, described damping plug is provided with damping hole, described damping hole is towards oil channel hole 120
Described spool 109 is arranged between main valve plug 102 and middle valve pocket 106 and its one end and is sleeved on main valve plug 102 and contacts the other end with pad 105 and contact with screw plug 112, described spool 109 comprises large footpath section successively from pad 105 place, transition shoulder and path section, the inwall of described large footpath section matches with main valve plug 102, the outer wall of described large footpath section matches with middle valve pocket 106, described large footpath section is connected by transition shoulder with path section, the joint of described large footpath section and transition shoulder is provided with oilhole ag117, the joint of described path section and transition shoulder is provided with oilhole af116, described screw plug 112 is provided with oil pocket ac113 with the contacting point of path section, step hole 118 is provided with in described spool 109, the large end of described step hole 118 matches with main valve plug 102 and is communicated with oilhole ag117 with oil channel hole 120 respectively, the small end of described step hole is communicated with oilhole af116,
Described valve core housing 110 is sleeved on the path section of spool 109 and contacts with transition shoulder, described valve core housing 110 matches with the path section of spool 109, described valve core housing 110 is provided with the oilhole ad114 communicated and oilhole ap132, and the other end of described oilhole ad114 is communicated with oil pocket ac113
Described middle valve pocket 106 is provided with oilhole ai119, oilhole ao129, gap 130, circular groove 131 and the oilhole ae115 be communicated with successively, the other end of described oilhole ai119 is communicated with spring chamber 128, the other end of described oilhole ae115 is communicated with oilhole ap132
Described relief valve device A is identical with relief valve device B structure,
The outlet oilhole am123 of described relief valve device A is all communicated with repairing mouth T with the outlet oilhole am123 of described relief valve device B.
Above-mentioned relief valve device A also comprises filter screen a126, filter screen fixed hole is also provided with in described main valve plug 102, described filter screen fixed hole is arranged between damping plug mounting hole and valve seat 101, the diameter of described filter screen a126 is greater than the aperture of damping plug mounting hole, and it is interior and vertical with damping hole that described filter screen a126 is fixed on filter screen fixed hole.
Said motor braking force control system comprises control unit, the control spool 209 that described control unit comprises control valve housing 208 and is arranged in control valve housing 208, and one end of described control valve housing 208 is fixed on motor casing 218, also comprises time delay assembly,
Described time delay assembly comprises time delay spool 215, damping plug 214 and spring zg216, it is interior and parallel with control spool 209 that described time delay spool 215 is arranged on control valve housing 208, from one end of motor casing, spring mounting hole and damping plug mounting hole is disposed with in described time delay spool 215, the aperture of described spring mounting hole is greater than the aperture of damping plug mounting hole, described spring zg216 is arranged in spring mounting hole, one end of described spring zg216 is fixed on motor casing, described damping plug 214 is fixed in damping plug mounting hole, described damping plug 214 is provided with damping hole,
The oilhole za217 of described motor braking force control system communicates with the 5th hydraulic fluid port, and the oilhole zh204 of described motor braking force control system communicates with the 6th hydraulic fluid port.
Said motor braking force control system also comprises filter screen z212, filter screen fixed hole is also provided with in described time delay spool 215, described filter screen fixed hole is arranged between damping plug mounting hole and control valve housing 208, the diameter of described filter screen z212 is greater than the aperture of damping plug mounting hole, and it is interior and vertical with damping hole that described filter screen z212 is fixed on filter screen fixed hole.
The above-mentioned damping device preventing motor inertia from reversing and swinging, described damping device comprises anti-reverse valve body and is arranged on anti-reverse rotary valve A315 on anti-reverse valve body and reverses valve B327, described anti-reverse valve body is provided with oilhole fq324, oilhole fo321, oilhole fl318, oilhole fi314, oil duct fh313 and oil duct fn320, described oilhole fq324, oilhole fo321 all communicate with motor hydraulic fluid port A, described oilhole fl318 and oilhole fi314 all communicates with motor hydraulic fluid port B, described oil duct fh313 communicates with oilhole fi314, described oil duct fn320 communicates with oilhole fo321
Described anti-reverse rotary valve A315 is identical with reverse valve B327 structure, comprises valve pocket 305, the spring fg312 be successively set in valve pocket 305, spool 325, steel ball 308, piston sleeve 303 and plug screw 301,
One end of described spring fg312 is fixed on anti-reverse valve body, its the other end is fixed on spool 325, steel ball installation cavity is provided with between described spool 325 and piston sleeve 303, described steel ball 308 is arranged in steel ball installation cavity, piston 302 and oil duct fb is provided with in described piston sleeve 303, one end of described steel ball installation cavity communicates with the spool oil duct 311 be arranged in spool 325 and steel ball 308 can sealed valve core oil duct 311, the other end of described steel ball installation cavity communicates with oil duct fb306, the centerline parallel of described oil duct fb306 steel ball installation cavity and not overlapping, the other end of described oil duct fb306 communicates with one end of piston 302, the other end of described piston 302 acts on plug screw 301, described piston 302 matches with piston sleeve 303,
Match with valve pocket 305 in one end of described piston sleeve 303, spring eye is provided with between the other end of described piston sleeve 303 and valve pocket 305, described spring fa304 is arranged in spring eye, one end of described spring fa304 acts on valve pocket 305, the other end of described spring fa304 acts on piston sleeve 303, and described spool 325, valve pocket 305 and piston sleeve 303 surround oil pocket fe310, and described valve pocket 305 is provided with circular groove, described circular groove communicates with oilhole fq324
Described valve pocket 305 is provided with oil duct fc307, oil duct fd309 and damping hole 322, one end of described oil duct fc307 communicates with oil duct fd309, the other end of described oil duct fc307 is communicated with spring eye, one end of described oil duct fd309 communicates with oil pocket fe310, the other end of described oil duct fd309 communicates with circular groove, damping oil pocket 323 is provided with between described spool 325 and valve pocket 305, described oil duct fh313 is communicated with damping oil pocket 323 by damping hole 322, described valve pocket 305 is provided with place and the end face seal of anti-reverse valve body of circular groove, described oil duct fh313 communicates with spool oil duct 311,
The oilhole 318 of described anti-reverse rotary valve B315 communicates with the circular groove of anti-reverse rotary valve A315, and the spool oil duct 311 of anti-reverse rotary valve A315 communicates with oil duct fn320, and described oil duct fn320 is communicated by the damping oil pocket 323 of damping hole 322 with anti-reverse rotary valve A315,
Described oilhole fo321 communicates with the first hydraulic fluid port, and described oilhole fq324 communicates with the second hydraulic fluid port, and described oilhole fl318 communicates with the 3rd oilhole, and described oilhole fi314 communicates with the 4th hydraulic fluid port.
Above-mentioned Fill valve device comprises oil recharging valve core 9, Fill valve spring 10 and Fill valve screw plug 11, and described Fill valve spring 10 is arranged in oil recharging valve core 9, and one end of described Fill valve spring 10 is fixed on oil recharging valve core, and the other end acts on Fill valve screw plug 11.
The advantage that the present invention has:
1, reliability is high.The present invention is the function modules such as Fill valve device, relief valve device, delay braking control gear at original oil hydraulic motor upper set, effective prevention and the various problems limited in existing driving hydraulic shovel rotary system existing for oil hydraulic motor, thus improve the functional reliability of oil hydraulic motor in this system.
2, integration is high, and efficiency is high.The present invention can while high reliability function in realization, integration and optimization process has been carried out to structure, thus achieve the feature that structure is simple, oil circuit simplifies, thus while achieving volume reduction, weight loss effect, greatly reduce oil circuit and lose and the working efficiency that improve motor.
3, relief valve device of the present invention, the basis of traditional direct-power safety valve structure adds damper assembly, introduce pressure balance principle, effectively improve the use pressure of direct-power safety valve, traditional Pilot operated safety valve of contrast uniform pressure flow grade, owing to there is no the double-valve structure of traditional Pilot operated safety valve, after operating principle more not having pilot valve open in advance to make the pressure release of main valve Seal cage, the loaded down with trivial details action that safety valve main valve plug is opened again, so have, operating principle is simple, reaction velocity fast and the advantage of portable construction.In addition; relief valve device adds spool 109 and valve core housing 110; structure can make the cracking pressure of this valve have individual uphill process gradually as shown in Figure 3; pressure rise curve as shown in Figure 4; therefore when its safety valve as protection oil hydraulic motor; the oil liquid pressure that can effectively reduce when oil hydraulic motor starts and brakes impacts, and which thereby enhances the operation comfort driving digger revolving oil hydraulic motor.
4, delay braking control gear of the present invention adds time delay device on the basis of motor braking force control system, thus achieves after oil hydraulic motor rotates stopping and entering braking state again.Add the motor braking force control system after time delay device, can realize entering braking state again after oil hydraulic motor rotates stopping, thus avoid when movable friction plate and static friction sheet exist very large pressure between and produce kinetic friction, this kinetic friction can cause very large wearing and tearing heating even directly to cause damage to oil hydraulic motor and braking force control system thereof, therefore delay braking control gear of the present invention substantially increases working life and the functional reliability of motor and braking force control system thereof.
5, damping device of the present invention, the oil liquid pressure that can reduce when oil hydraulic motor is switched to braking state by working state impacts, prevent from motor from producing to reverse and dancing, the functional reliability of effective raising oil hydraulic motor, in addition, buffer unit structure is simply compact, easy to connect, only 4 of a damping device actuator port need be connected with corresponding motor oil inlet and outlet.
Accompanying drawing explanation
Fig. 1 is the structure diagram of High-reliability hydraulic motor;
The structure diagram of Fig. 2 height integrated hydraulic motor;
Fig. 3 is the structure diagram of the high reliability direct-power safety valve device of band fluid pressure balance principle;
The cracking pressure figure of the high reliability direct-power safety valve device of Fig. 4 band fluid pressure balance principle;
Fig. 5 is the structure diagram of motor braking force control system;
Fig. 6 is the structure diagram of the motor braking force control system adding time delay assembly;
Fig. 7 is the buffer unit structure sketch preventing motor inertia from reversing and swinging;
Fig. 8 is the damping device interface schema preventing motor inertia from reversing and swinging;
Wherein reference character is: 1-motor spindle, 2-motor casing, 3-relief valve device B, 4-leaks hydraulic fluid port dr, 5-repairing mouth T, 6-anti-reverse damping device, 7-motor end cap, 8-delay braking control gear, 9-oil recharging valve core, 10-Fill valve spring, 11-Fill valve screw plug, 12-first hydraulic fluid port, 13-second hydraulic fluid port, 14-the 3rd hydraulic fluid port, 15-the 4th hydraulic fluid port, 16-the 5th hydraulic fluid port, 17-the 6th hydraulic fluid port, 18-relief valve device A, 19-Fill valve device B, 20-Fill valve device A, 101-valve seat, 102-main valve plug, 103-main valve housing, 104-spring, 105-pad, valve pocket in 106-, 107-oil pocket aa, 108-oil pocket ab, 109-spool, 110-valve core housing, 111-locking nut, 112-screw plug, 113-oil pocket ac, 114-oilhole ad, 115-oilhole ae, 116-oilhole af, 117-oilhole ag, 118-oil pocket ah, 119-oilhole ai, 120-oil channel hole aj, 121-oilhole ak, 122-damping hole a, 123-oilhole am, 124-oilhole an, 125-resilient key a, 126-filter screen a, 127-damping plug, 128-spring chamber, 129-oilhole ao, 130-gap, 131-circular groove, 132-oilhole ap, 201-movable friction plate, 202-static friction sheet, 203-brake piston Seal cage, 204-oilhole za, 205-grease chamber zb, 206-spring zc, 207-oilhole zd, 208-control valve housing, 209-controls spool, 210-oilhole ze, 211-grease chamber zf, 212-filter screen z, 213-resilient key z, 214-damping plug, 215-time delay spool, 216-spring zg, 217-oilhole zh, 218-motor casing, 219-brake piston, 220-motor cover plate, 221-brake spring, 222-cylinder body, 223-oil groove zi, 301-plug screw, 302-piston, 303-piston sleeve, 304-spring fa, 305-valve pocket, 306-oil duct fb, 307-oil duct fc, 308-steel ball, 309-oil duct fd, 310-oil pocket fe, 311-spool oil duct, 312-spring fg, 313-oil duct fh, 314-oilhole fi, 315-check valve A, 316-oil pocket fj, 317-oil duct fk, 318-oilhole fl, 319-oil duct fm, 320-oil duct fn, 321-oilhole fo, 322-damping hole, 323-damping oil pocket, 324-oilhole fq, 325-spool, 326-oil pocket fr, 327-check valve B, 328-spring eye, 329-steel ball installation cavity, 330-circular groove,
Embodiment
As Fig. 1, shown in Fig. 2, a kind of High-reliability hydraulic motor, comprises motor end cap and motor casing, and described motor end cap is arranged on motor casing, motor end cap is provided with hydraulic fluid port A, hydraulic fluid port B, repairing mouth T, reveal hydraulic fluid port dr, first hydraulic fluid port, second hydraulic fluid port, 3rd hydraulic fluid port, 4th hydraulic fluid port, relief valve device A, relief valve device B, damping device and Fill valve device A and Fill valve device B, motor casing is provided with the 5th hydraulic fluid port, 6th hydraulic fluid port and braking force control system, hydraulic fluid port A is communicated with the entrance of relief valve device A, and hydraulic fluid port B is communicated with the entrance of relief valve device B, repairing mouth T, reveal the equal connected tank of hydraulic fluid port dr, hydraulic fluid port A is communicated with repairing mouth T by Fill valve device A, hydraulic fluid port B is communicated with repairing mouth T by Fill valve device B, first hydraulic fluid port and the second hydraulic fluid port communicate with hydraulic fluid port A, 3rd hydraulic fluid port and the 4th hydraulic fluid port communicate with hydraulic fluid port B, four actuator ports of damping device respectively with the first hydraulic fluid port, second hydraulic fluid port, 3rd hydraulic fluid port and the 4th hydraulic fluid port communicate, and the 5th hydraulic fluid port and the 6th hydraulic fluid port communicate with two actuator ports of motor braking force control system respectively.
Working principle of the present invention:
First safety valve is added: hydraulic oil is entrance by the oilhole an of valve seat 101, now action of hydraulic force pushes away left to the right-hand member conical surface of main valve plug 102, the section hydraulic oil of main valve plug right-hand member enters oilhole aj through filter screen 126, damping hole 122a, enter oil pocket ah again, hydraulic oil to the left side formation hydraulic thrust to the right of main valve plug 102, so just introduces the hydraulic balance principle of similar Pilot operated safety valve in ah chamber (Seal cage).Difference is that traditional Pilot operated safety valve pushes the active area of main valve plug open for fluid, be less than the active area that its Seal cage inner fluid makes main valve plug close, therefore no matter oil liquid pressure has much, tradition Pilot operated safety valve can only after its pilot valve be opened, after pressure in main valve Seal cage is reduced, main valve plug just can be pushed and produce opening degree, and cracking pressure depends on the cracking pressure of pilot valve, and the high reliability direct-power safety valve device of this band fluid pressure balance principle of the present invention, the active area of main valve plug is pushed open for fluid, be greater than the active area that its Seal cage (ah chamber) fluid makes main valve plug close, therefore when pressure is large to a certain extent, when hydraulic coupling is left enough to the spring force overcoming spring 104, main valve plug directly will be pushed and produce opening degree, make fluid can by oilhole an, opening between main valve plug 102 and valve seat 101, oilhole 123 enters oil duct and flows back to fuel tank, cracking pressure depends on the difference in areas of two acting surfaces and the impacting force of spring.
Shown in Fig. 3; the cracking pressure of this valve can be made to have individual uphill process gradually; therefore when its safety valve as protection oil hydraulic motor, compression shock when oil hydraulic motor starts and brakes can be effectively reduced, improve the operation comfort of construction machinery hydraulic system.Specific implementation process is as described below: when oil hydraulic motor starts, the cracking pressure of this valve is determined by the initial spring force of spring 104, when the hydraulic action of fluid is greater than the initial spring force of spring 104, main valve plug 102 is opened, and a part of fluid can be entered oil duct and be flowed back to fuel tank by oilhole an, the opening between main valve plug 102 and valve seat 101, oilhole 123, along with pressure oil enters oil pocket ah through damping hole 122a, form the hydraulic thrust that main valve plug 102 is closed, fluid pressure balance principle is set up thus, therefore cracking pressure straight line rises, along with the rising of oil pocket ah pressure, fluid enters oil pocket aa through oil-through hole ag and forms hydraulic thrust left to spool 109, simultaneously fluid enters oil pocket ab through oil-through hole af and forms hydraulic thrust to the right to spool 109, because thrust area is to the right greater than thrust area left, therefore when pressure increase is to when can overcome the spring force of spring 104, spool 109 can move right further Compress Spring 104, the cracking pressure of this valve is made to increase gradually, fluid now in oil pocket aa enters oil pocket ah by oilhole ag, because spool 109 moves right, volume change forms greatly vacuum to oil pocket ac, fluid passes through oilhole ak from fuel tank, spring chamber 128, oilhole ai, oilhole ao, gap 130, circular groove 131, oilhole ae, oilhole ap, oilhole ad enter oil pocket ac carry out fluid supplement, until spool 109 moves to stroke terminal and middle valve pocket 106 end face is fitted, the cracking pressure of this valve reaches the highest, its pressure rise curve as shown in Figure 4, when motor is braked, when oil circuit pressure reduces, spool 109 is moved to the left under the effect of spring 104, fluid in oil pocket ab enters oil pocket ah by oilhole af, oil pocket aa forms vacuum because volume becomes large, fluid in oil pocket ah by oilhole ag enter oil pocket aa carry out fluid supplement, fluid in oil pocket ac is entered oil duct flowed back to fuel tank by oilhole ad, oilhole ap, oilhole ae, circular groove 131, gap 130, oilhole ao, oilhole ai, spring chamber 128, oilhole ak, and whole process gentle transition effectively prevent compression shock.
In addition, the high reliability direct-power safety valve of the fluid pressure balance of band shown in Fig. 3 principle is compared with traditional Pilot operated safety valve, also overcome the drawback of a traditional type, that be exactly traditional type safety valve damping hole because of aperture too little, work under the bad working environments of engineering machinery very easily blocked, if damping hole is blocked, fluid pressure balance principle just no longer exists, and then the cracking pressure of relief valve can reduce greatly, make hydraulic system cannot set up required pressure because of safety valve operational failure, and then cause complete machine cisco unity malfunction, such as oil hydraulic motor is because of situations such as adynamia stop operating.So before the damping hole 122a of the high reliability direct-power safety valve of this band fluid pressure balance principle, the present invention with the addition of accurate filter screen device, as shown in Figure 3, front end filter screen 126a and resilient key 125a being arranged on main valve plug 102 constitutes accurate filter screen device.This accurate filter screen device compact structure, additional size can not be increased, and fluid is before entering damping hole 122a, it must be the accurate filter screen device of 0.02mm by filter precision, therefore effectively can ensure that fluid can not block damping hole 122a (diameter is 0.35mm), thus substantially increase the functional reliability of this band fluid pressure balance principle direct-power safety valve; In addition, damping hole 122a is arranged on damping plug 127 by the present invention, substantially improve the technology capability of this aperture, avoid the easily broken problem of drill bit during processing damping hole, and also substantially improve the maintainability of high reliability direct-power safety valve at this place of this band fluid pressure balance principle, once accurate filter screen and damping hole blocking, only need be taken off cleaning or be changed, and do not worry injury or change main valve plug 2.
The control for brake principle of first illustratively this oil hydraulic motor, under original state, control spool 209 under the effect of spring zc, be in left position state, now oilhole zd and oilhole za conducting and grease chamber zf and oilhole ze closes, make the fluid in brake piston Seal cage 203, oilhole zh can be passed through, oilhole ze, grease chamber zb, oilhole zd, oilhole za, oil groove zi enters in motor casing 218, and then flow back to fuel tank by motor casing leakage hydraulic fluid port dr, so now brake piston 219, be depressed under the effect of brake spring 221, make together with movable friction plate 201 is pasted in tightly with static friction sheet 202, can not relatively rotate, external tooth due to static friction sheet 202 is embedded in the groove of motor casing 218, so static friction sheet 202 also just can not have rotated after motor casing 218 is fixing, and then movable friction plate 201 can not rotate, again because the internal tooth of movable friction plate 201 is embedded in the groove of cylinder body 222, so cylinder body 222 can not drive motor spindle have rotated, thus achieve the braking state of oil hydraulic motor, when hydraulic fluid port SH imports pressure oil, control spool 209 is subject to the effect of hydraulic coupling in left side under, overcoming spring zc active force left moves right when being in right position, grease chamber zf and oilhole ze conducting oilhole zd and oilhole za closes, the pressure oil in hydraulic fluid port PG can be made, by grease chamber zf, oilhole ze, oilhole zh enters in brake piston Seal cage 203, so brake piston 219 overcomes the spring force of brake spring 221 and upwards lifts under the effect of hydraulic coupling, now movable friction plate 201 and static friction sheet 202 no longer compress sturdy, therefore cylinder body 222 is under the effect of hydraulic coupling, can rotate together with movable friction plate 201, and then drive motor spindle 1 to rotate by spline joint, thus achieve the brake release state of a control of oil hydraulic motor.
Due to the break-make control mode of said method above; cause oil hydraulic motor and enter braking state very soon after control for brake valve events; and oil hydraulic motor can also have being rotated further among a small circle because of the effect of inertia load usually; kinetic friction is produced when causing movable friction plate 201 and static friction sheet 202 to there is very large pressure between; this kinetic friction can cause very large wearing and tearing heating even directly to cause damage to oil hydraulic motor and braking force control system thereof, the operating life of extreme influence oil hydraulic motor and braking force control system thereof and functional reliability.In order to avoid producing this kinetic friction made a very bad impression, the present invention with the addition of time delay assembly on the basis of existing brake control valve.When the pressure oil of SH mouth cuts off, control spool 209 under the effect of spring zc, get back to left position state, now oilhole zd and oilhole za conducting and grease chamber f and oilhole ze closes, make the fluid in brake piston Seal cage 203, oilhole zh can be passed through, oilhole ze, time delay assembly, grease chamber zb, oilhole zd, oilhole za, oil groove zi enters motor casing, and then flow back to fuel tank by motor casing Leak hole, so now brake piston 219, be depressed under the effect of brake spring 221 spring force, make together with movable friction plate 201 is pasted in tightly with static friction sheet 202, can not relatively rotate, thus realize braking.But because the fluid in now brake piston Seal cage flows back in the process of fuel tank, time delay assembly will be passed through, and the damping hole on time delay assembly can limit flow when fluid flows back to fuel tank effectively, simultaneously because the damping function of damping hole can make to produce certain pressure reduction before and after it, when this pressure reduction large to a certain extent time time delay spool 215 can be made to overcome spring zg active force move right, thus turn down the opening degree of even closing grease chamber zb to oilhole za, until after the spring force of pressure reduction before and after damping hole and spring zg balances each other, fluid in grease chamber zb could flow to oilhole za gradually, again through oil groove zi, motor casing 218 flows back to fuel tank, so in certain pressure range (3.4 ~ 5Mpa), time delay assembly can realize delay effect effectively.Through verification experimental verification of the present invention, this time delay assembly can delay braking about process 4s, kinetic friction phenomenon after can effectively preventing oil hydraulic motor friction plate in braking process from compressing, effectively improves operating life and the functional reliability of oil hydraulic motor and braking force control system thereof.
Also add anti-reverse damping device, compression shock when oil hydraulic motor is switched to braking state by working state can be reduced, prevent motor from producing and reverse and dancing, effectively improve the functional reliability of oil hydraulic motor.Anti-reverse buffer unit structure is simply compact, easy to connect, only need will prevent 4 actuator ports (as shown in Figure 8) of motor inertia reverse and oscillation damping means, connect with corresponding motor oil inlet and outlet, namely make oilhole fo and oilhole fq communicate with motor hydraulic fluid port A, oilhole fi and oilhole fl communicates with motor hydraulic fluid port B.
Anti-reverse rotary valve is when meta state, piston sleeve 303 is in left position and withstands piston 302 under the effect of spring fa4, spool 325 is also in left position and withstands piston sleeve 303 under the effect of spring fg312, when motor be in high-pressure work state anti-time reverse valve A and anti-reverse rotary valve B be meta state, now piston sleeve 303 remains with spool 325 and contacts, and enters low pressure oil way without high pressure oil through anti-reverse rotary valve.When when oil hydraulic motor is filler opening by motor hydraulic fluid port A, working state that motor hydraulic fluid port B is oil outlet is switched to braking halted state, the oil inlet and outlet of motor is all cut off by control spool, but the effect of inertia due to load can make oil hydraulic motor be rotated further, and then the oil channel sealing chamber of connecting fluid pressure motor oil inlet and outlet can produce pressure change, namely the oil channel sealing chamber of original connecting motor hydraulic fluid port A becomes low pressure seal chamber because volume increases, and the oil channel sealing chamber of original connecting motor hydraulic fluid port B becomes high-pressure sealing chamber because volume reduces, the working state of anti-reverse rotary valve B is: partial high pressure oil is through oil-through hole fi, oil duct fh, spool oil duct, steel ball 308, oil duct fb enters oil pocket fr, the spring force that high pressure oil effect makes piston sleeve 303 overcome spring fa moves right, and then the spring force that spool 325 overcomes spring fg under the effect of piston sleeve 303 moves right, whole process piston sleeve 303 remains with spool 325 and contacts, enter the oil circuit at motor hydraulic fluid port A place through anti-reverse rotary valve B from motor hydraulic fluid port B without high pressure oil, when motor inertia rotates by when stopping, pressure in oil pocket fr declines gradually, thus piston sleeve 303 is moved to the left under the spring-force driven dual of spring fa, spool 325 is moved to the left under the effect of spring fg, due to the damping function of damping hole 322, mobile the mobile of opposing pistons cover 303 of spool 325 produces time-lag action, therefore spool 325 and piston sleeve 303 no longer keep in touch and produce opening, make motor hydraulic fluid port B place oil circuit, by oilhole fi, oil duct fh, spool oil duct, the opening of spool 325 and piston sleeve 303, oil duct fd, circular groove 330, oilhole fq communicates with motor hydraulic fluid port A place oil circuit, thus the pressure achieving high low pressure Seal cage is consistent rapidly, the pressure imbalance state causing oil hydraulic motor to produce due to inertia load is eliminated, thus solve the reverse and dancing that motor produces due to inertia load.In like manner, when when motor hydraulic fluid port B is filler opening, motor hydraulic fluid port A is oil outlet, generation effect when anti-reverse rotary valve A can switch in working order, the pressure imbalance state making inertia load that motor is produced is eliminated, thus solves reverse and dancing that motor produces due to inertia load.
When the oil circuit at motor hydraulic fluid port A place occurs vacuum due to special operation condition, the fluid in fuel tank can make Fill valve device A action by repairing mouth T, and the spring force namely overcoming Fill valve spring 10 promotes oil recharging valve core 9, enters hydraulic fluid port A place oil circuit and carries out repairing; When the oil circuit at motor hydraulic fluid port B place occurs vacuum due to special operation condition, the fluid in fuel tank can make Fill valve device B action by repairing mouth T, and the spring force namely overcoming Fill valve spring 10 promotes oil recharging valve core 9, enters hydraulic fluid port A place oil circuit and carries out repairing.
Claims (7)
1. a High-reliability hydraulic motor, comprises motor end cap and motor casing, and described motor end cap is arranged on motor casing, it is characterized in that:
Described motor end cap is provided with hydraulic fluid port A, hydraulic fluid port B, repairing mouth T, reveals hydraulic fluid port dr, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port, relief valve device A, relief valve device B, damping device and Fill valve device A and Fill valve device B, described motor casing is provided with the 5th hydraulic fluid port, the 6th hydraulic fluid port and motor braking force control system
Described hydraulic fluid port A is communicated with the entrance of relief valve device A, described hydraulic fluid port B is communicated with the entrance of relief valve device B, described repairing mouth T, the equal connected tank of leakage hydraulic fluid port dr, and hydraulic fluid port A is communicated with repairing mouth T by Fill valve device A, hydraulic fluid port B is communicated with repairing mouth T by Fill valve device B
Described first hydraulic fluid port and the second hydraulic fluid port communicate with hydraulic fluid port A, and described 3rd hydraulic fluid port and the 4th hydraulic fluid port communicate with hydraulic fluid port B, and four actuator ports of described damping device communicate with the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port respectively,
Described 5th hydraulic fluid port and the 6th hydraulic fluid port communicate with two actuator ports of motor braking force control system respectively.
2. High-reliability hydraulic motor according to claim 1, described relief valve device A comprises main valve housing (103), is fixed on the valve seat (101) of main valve housing (103) one end, the main valve plug (102) be arranged in main valve housing (103), be sleeved on spring (104) on main valve plug (102) and middle valve pocket (106) and be fixed on the screw plug (112) of middle valve pocket (106) one end
Described spring (104) is positioned at the spring chamber (128) formed between main valve housing (103) and main valve plug (102), one end of described spring (104) is fixed on main valve plug (102), described spring (104) the other end is acted on middle valve pocket (106) by pad (105)
Described main valve housing (103) is provided with and controls oil import and export (121), described one end controlling oil import and export (121) is communicated with fuel tank, the described the other end controlling oil import and export (121) is communicated with spring chamber (128)
Be provided with oil channel hole (120) in described main valve plug, described main valve plug (102) contacts with valve seat (101) linear sealing, and described middle valve pocket (106) is fixedly connected with main valve housing (103),
Also comprise damper assembly, spool (109) and valve core housing (110),
Described damper assembly is arranged in main valve plug (102), described damper assembly comprises the damping plug mounting hole be arranged in main valve plug (102) and the damping plug be fixed in damping plug mounting hole, one end of described damping plug mounting hole is towards valve seat (101), the other end of described damping plug mounting hole is towards oil channel hole (120), described damping plug is provided with damping hole, described damping hole is towards oil channel hole (120)
Described spool (109) is arranged between main valve plug (102) and middle valve pocket (106) and its one end, and to be sleeved on main valve plug (102) upper and contact with pad (105), the other end contacts with screw plug (112), described spool (109) comprises large footpath section successively from pad (105) place, transition shoulder and path section, the inwall of described large footpath section matches with main valve plug (102), the outer wall of described large footpath section matches with middle valve pocket (106), described large footpath section is connected by transition shoulder with path section, the joint of described large footpath section and transition shoulder is provided with oilhole ag (117), the joint of described path section and transition shoulder is provided with oilhole af (116), described screw plug (112) is provided with oil pocket ac (113) with the contacting point of path section, step hole (118) is provided with in described spool (109), the large end of described step hole (118) matches with main valve plug (102) and is communicated with oilhole ag (117) with oil channel hole (120) respectively, the small end of described step hole is communicated with oilhole af (116),
Described valve core housing (110) is sleeved on the path section of spool (109) and contacts with transition shoulder, described valve core housing (110) matches with the path section of spool (109), described valve core housing (110) is provided with the oilhole ad (114) and oilhole ap (132) that communicate, the other end of described oilhole ad (114) is communicated with oil pocket ac (113)
Described middle valve pocket (106) is provided with the oilhole ai (119), oilhole ao (129), gap (130), circular groove (131) and the oilhole ae (115) that are communicated with successively, the other end of described oilhole ai (119) is communicated with spring chamber (128), the other end of described oilhole ae (115) is communicated with oilhole ap (132)
Described relief valve device A is identical with relief valve device B structure,
The outlet oilhole am (123) of described relief valve device A is all communicated with repairing mouth T with the outlet oilhole am (123) of described relief valve device B.
3. High-reliability hydraulic motor according to claim 2, it is characterized in that: described relief valve device A also comprises filter screen a (126), described main valve plug is also provided with filter screen fixed hole in (102), described filter screen fixed hole is arranged between damping plug mounting hole and valve seat (101), the diameter of described filter screen a (126) is greater than the aperture of damping plug mounting hole, and it is interior and vertical with damping hole that described filter screen a (126) is fixed on filter screen fixed hole.
4. High-reliability hydraulic motor according to claim 1, it is characterized in that: described motor braking force control system comprises control unit, described control unit comprises control valve housing (208) and is arranged on the control spool (209) in control valve housing (208), one end of described control valve housing (208) is fixed on motor casing (218), also comprise time delay assembly
Described time delay assembly comprises time delay spool (215), damping plug (214) and spring zg (216), it is interior and parallel with control spool (209) that described time delay spool (215) is arranged on control valve housing (208), from one end of motor casing, spring mounting hole and damping plug mounting hole is disposed with in described time delay spool (215), the aperture of described spring mounting hole is greater than the aperture of damping plug mounting hole, described spring zg (216) is arranged in spring mounting hole, one end of described spring zg (216) is fixed on motor casing, described damping plug (214) is fixed in damping plug mounting hole, (214) are provided with damping hole to described damping plug,
The oilhole za (217) of described motor braking force control system communicates with the 5th hydraulic fluid port, and the oilhole zh (204) of described motor braking force control system communicates with the 6th hydraulic fluid port.
5. High-reliability hydraulic motor according to claim 4, it is characterized in that: described motor braking force control system also comprises filter screen z (212), filter screen fixed hole is also provided with in described time delay spool (215), described filter screen fixed hole is arranged between damping plug mounting hole and control valve housing (208), the diameter of described filter screen z (212) is greater than the aperture of damping plug mounting hole, and it is interior and vertical with damping hole that described filter screen z (212) is fixed on filter screen fixed hole.
6. High-reliability hydraulic motor according to claim 1, it is characterized in that: described damping device comprises anti-reverse valve body and the anti-reverse rotary valve A (315) that is arranged on anti-reverse valve body and reverse valve B (327), described anti-reverse valve body is provided with oilhole fq (324), oilhole fo (321), oilhole fl (318), oilhole fi (314), oil duct fh (313) and oil duct fn (320), described oilhole fq (324), oilhole fo (321) all communicates with motor hydraulic fluid port A, described oilhole fl (318) and oilhole fi (314) all communicate with motor hydraulic fluid port B, described oil duct fh (313) communicates with oilhole fi (314), described oil duct fn (320) communicates with oilhole fo (321),
Described anti-reverse rotary valve A (315) is identical with reverse valve B (327) structure, comprise valve pocket (305), the spring fg (312) be successively set in valve pocket (305), spool (325), steel ball (308), piston sleeve (303) and plug screw (301)
One end of described spring fg (312) is fixed on anti-reverse valve body, its the other end is fixed on spool (325), steel ball installation cavity is provided with between described spool (325) and piston sleeve (303), described steel ball (308) is arranged in steel ball installation cavity, piston (302) and oil duct fb is provided with in described piston sleeve (303), one end of described steel ball installation cavity communicates with the spool oil duct (311) be arranged in spool (325) and steel ball (308) can sealed valve core oil duct (311), the other end of described steel ball installation cavity communicates with oil duct fb (306), the centerline parallel of described oil duct fb (306) and steel ball installation cavity and not overlapping, the other end of described oil duct fb (306) communicates with one end of piston (302), the other end of described piston (302) acts on plug screw (301), described piston (302) matches with piston sleeve (303),
Match with valve pocket (305) in one end of described piston sleeve (303), spring eye is provided with between the other end of described piston sleeve (303) and valve pocket (305), described spring fa (304) is arranged in spring eye, one end of described spring fa (304) acts on valve pocket (305), the other end of described spring fa (304) acts on piston sleeve (303), described spool (325), valve pocket (305) and piston sleeve (303) surround oil pocket fe (310), (305) are provided with circular groove to described valve pocket, described circular groove communicates with oilhole fq (324),
Described valve pocket (305) is provided with oil duct fc (307), oil duct fd (309) and damping hole (322), one end of described oil duct fc (307) communicates with oil duct fd (309), the other end of described oil duct fc (307) is communicated with spring eye, one end of described oil duct fd (309) communicates with oil pocket fe (310), the other end of described oil duct fd (309) communicates with circular groove, damping oil pocket (323) is provided with between described spool (325) and valve pocket (305), described oil duct fh (313) is communicated with damping oil pocket (323) by damping hole (322), described valve pocket (305) is provided with place and the end face seal of anti-reverse valve body of circular groove, described oil duct fh (313) communicates with spool oil duct (311),
The oilhole fl (318) of described anti-reverse rotary valve B (327) communicates with the circular groove of anti-reverse rotary valve A (315), the spool oil duct (311) of anti-reverse rotary valve A (315) communicates with oil duct fn (320), described oil duct fn (320) is communicated by the damping oil pocket (323) of damping hole (322) with anti-reverse rotary valve A (315)
Described oilhole fo (321) communicates with the first hydraulic fluid port, and described oilhole fq (324) communicates with the second hydraulic fluid port, and described oilhole fl (318) communicates with the 3rd oilhole, and described oilhole fi (314) communicates with the 4th hydraulic fluid port.
7. High-reliability hydraulic motor according to claim 1, it is characterized in that: described Fill valve device comprises oil recharging valve core (9), Fill valve spring (10) and Fill valve screw plug (11), described Fill valve spring (10) is arranged in oil recharging valve core (9), one end of described Fill valve spring (10) is fixed on oil recharging valve core, and the other end acts on Fill valve screw plug (11).
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| US9908515B2 (en) * | 2015-06-29 | 2018-03-06 | Deere & Company | Drive assembly with multi-function actuator for motor and brake control |
| CN105909585B (en) * | 2016-03-03 | 2018-04-27 | 杭州力龙液压有限公司 | One kind prevents oscillatory valve |
| CN108035925A (en) * | 2017-12-04 | 2018-05-15 | 陕西航天动力高科技股份有限公司 | A kind of high reliability buffering throttling oil cylinder connection valve block assembly |
| CN109899332B (en) * | 2019-04-12 | 2020-05-08 | 江苏汇智高端工程机械创新中心有限公司 | Walking motor time-delay brake valve and walking motor |
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| JP2000130403A (en) * | 1998-10-27 | 2000-05-12 | Toshiba Mach Co Ltd | Hydraulic motor device having relief valve |
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| CN2711433Y (en) * | 2004-07-16 | 2005-07-20 | 胡世璇 | Integration of control component and hydraulic motor in oil distributor |
| CN101421511A (en) * | 2006-04-12 | 2009-04-29 | 科默工业股份公司 | Hydraulic motor with axial pistons |
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