CN103786709B - A kind of hydraulic brake system is met an urgent need pumping source tank drainback voltage rise protective valve - Google Patents
A kind of hydraulic brake system is met an urgent need pumping source tank drainback voltage rise protective valve Download PDFInfo
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- CN103786709B CN103786709B CN201410035925.XA CN201410035925A CN103786709B CN 103786709 B CN103786709 B CN 103786709B CN 201410035925 A CN201410035925 A CN 201410035925A CN 103786709 B CN103786709 B CN 103786709B
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- spool
- shape circle
- pumping source
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- voltage rise
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Abstract
This patent belongs to technical field of hydraulic pressure, damage because spill pressure raises for avoiding the sealed reservoir of emergent pumping source, the invention provides a kind of hydraulic brake system to meet an urgent need pumping source tank drainback voltage rise protective valve, by the structure of spool land end face band O shape circle, after system oil return pressure is elevated to certain pressure, the O shape circle end face seal face corresponding to valve body of spool is fitted and is compressed, achieve the ne-leakage side seal that oil circuit cuts off, the no-leakage valve core radial seal that coil structures achieves oil circuit cut-out is carried out by the hole lattice of spool, thus realize when spill pressure raises the completely disconnected of rear fuel tank and oil return, protection fuel tank does not raise by spill pressure to be affected, compact conformation of the present invention, reliable operation, simple and practical.
Description
Technical field
This patent belongs to technical field of hydraulic pressure, is specifically related to a kind of hydraulic brake system and meets an urgent need pumping source tank drainback voltage rise protective valve, avoids the sealed reservoir of emergent pumping source to damage because spill pressure raises.
Background technology
Automobile hydraulic system is the same with general hydraulic efficiency pressure system, usually by fuel tank, oil pump, valve, the compositions such as pipeline, but due to space constraint, often claimed structure is compact, some for subsequent use or emergent oil sources often can only use sealed reservoir, and sealed reservoir will consider system oil return stress problems, once spill pressure exceeds the bearing capacity of sealed reservoir, fuel tank will be caused to damage, the system failure, such as some special vehicle hydraulic braking brake system fuel feeding are from driving device assembly, and when driving device assembly lifts, need the confession of hydraulic braking system, oil return is supplied with the braking of driving device assembly by quick coupling (after disconnecting automatic-sealed), oil return disconnects.After disconnection, other car upper part of hydraulic brake system just define a closed system, but hydraulic braking system also comprises brake accumulator, contain brake-pressure oil, the gap that the pressure oil of energy storage can pass through system valve (brake activation valve adopts guiding valve usually) progresses into oil return line, causes spill pressure to raise, as now system contains for subsequent use or emergent pumping source of braking, and its sealed reservoir is directly connected with system oil return, fuel tank will be caused to damage because spill pressure is too high.
Therefore, need to design a kind of hydraulic braking and to meet an urgent need pumping source tank drainback-voltage rise protective valve, make the sealed reservoir of jury pump can not be impaired because of the rising of system oil return pressure.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is to provide a kind of hydraulic brake system and meets an urgent need pumping source tank drainback voltage rise protective valve, is applied in spill pressure rising and can causes brokenly on the sealed reservoir of ring.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of hydraulic braking to meet an urgent need pumping source tank drainback voltage rise protective valve, comprise O shape circle, nut, cover plate, left spool, O shape circle trim ring, valve body, spool, back-up ring, flange, screw, spring and pressure regulation bung flange, described back-up ring interference is arranged on spool, the interference of O shape circle trim ring is arranged on left spool, and left spool flush fit is arranged on spool; Nut is screwed on spool by screw thread, fixes spacing to left spool; It is characterized in that: this protective valve also comprises O shape circle and hole lattice enclose, the assembling before left spool is installed of described O shape circle; 2 hole lattice enclose to be installed before back-up ring and nut assembling; Cover plate, flange are arranged on valve body by screw; Pressure regulation bung flange is screwed onto on flange, and spacing by screw.
Wherein, described nut, hole Ge Laiquan, left spool, O shape circle trim ring, O shape circle, spool and back-up ring form the combination valve core of described protective valve.
Wherein, the described equal diameters on combination valve core oil groove both sides or the diameter of oil inlet end are greater than the diameter of feedback end, then the static force that combination valve core is subject to is that F static state=P feedback × S feeds back end face-F spring-F friction force.
Wherein, spill pressure is applied to the left end of combination valve core by the feedback hole of described spool; when spill pressure raise the thrust formed be greater than the force of sliding friction of pre-pressure of the spring on the right side of combination valve core and combination valve core self time; oil return promotes spool and moves right; after spill pressure is elevated to setting value, fit with the corresponding end face of valve body in the right side of left spool, and the O shape circle simultaneously on combination valve core also combines with the corresponding end face of valve body; form side seal, and protective valve is after formation side seal.
(3) beneficial effect
Compared with prior art, the present invention possesses following beneficial effect:
1, hydraulic braking provided by the invention is met an urgent need pumping source tank drainback voltage rise protective valve, by the structure of spool land end face band O shape circle, after system oil return pressure is elevated to certain pressure, the O shape circle end face seal face corresponding to valve body of spool is fitted and is compressed, achieve the ne-leakage side seal that oil circuit cuts off, the no-leakage valve core radial seal that coil structures achieves oil circuit cut-out is carried out by the hole lattice of spool, thus realizing when spill pressure raises the completely disconnected of rear fuel tank and oil return, protection fuel tank does not affect by spill pressure rising;
2, compact conformation of the present invention, reliable operation, simple and practical.
Accompanying drawing explanation
Fig. 1 is that hydraulic braking provided by the invention is met an urgent need the structural representation of pumping source tank drainback voltage rise protective valve;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is that hydraulic braking provided by the invention is met an urgent need the hydraulic applications schematic diagram of pumping source tank drainback voltage rise protective valve;
Fig. 4 is the schematic diagram that hydraulic braking provided by the invention is met an urgent need in pumping source tank drainback voltage rise protective valve after spool action;
Fig. 5 is that hydraulic braking provided by the invention is met an urgent need the assembling enlarged diagram of spool in pumping source tank drainback voltage rise protective valve.
Detailed description of the invention
For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Oil return protective valve of the present invention is met an urgent need as vehicle brake hydraulic system the part of pumping source, and oil inlet is connected with total oil return of vehicle brake hydraulic system, and oil outlet is connected with the fuel tank of emergent pumping source.
As Fig. 1,2,3, shown in 4 and 5, hydraulic braking provided by the invention is met an urgent need pumping source tank drainback voltage rise protective valve, comprise O shape circle 1, nut 2, cover plate 3, left spool 5, O shape circle trim ring 6, valve body 8, spool 9, back-up ring 10, flange 11, screw 12, spring 13 and pressure regulation bung flange 14, the interference of described back-up ring 10 is arranged on spool 9, the interference of O shape circle trim ring 6 is arranged on left spool 5, and left spool 5 flush fit is arranged on spool 9; Nut 2 is screwed on spool 9 by screw thread, fixes spacing to left spool 5; This protective valve also comprises O shape circle 7 and hole lattice enclose 4, and described O shape circle 7 installs front assembling at left spool 5; 2 hole lattice enclose 4 and assemble front installation at back-up ring 10 and nut 2; Cover plate 3, flange 11 are arranged on valve body 8 by screw 12; Pressure regulation bung flange 14 is screwed onto on flange 11, and is located by screw 15.O shape is enclosed 1 pair of valve body 8 and is sealed; Cover plate 3 pairs of combination valve cores are spacing; Valve body 8 provides location and the support of oil duct and other parts of valve; Flange 11 plays spacing, positioning supports effect; Screw 12 fixations; Spring 13 is to the pressure limiting of emergent pumping source tank drainback, combination valve core return; Pressure regulation bung flange 14 realizes emergent oil sources tank drainback pressure limiting adjustment.
Wherein, the combination valve core that described nut 2, hole lattice enclose 4, left spool 5, O shape circle trim ring 6, O shape circle 7, spool 9 and back-up ring 10 form described protective valve.Nut 2 encloses 4 spacing to left spool 5, hole lattice; Hole lattice enclose 4 pairs of spool radial clearance seals, reduce the friction drag of spool, reduce the minimum voltage limiting value of protective valve; The diameter that left spool 5 makes combination valve core cross two ends, oil groove left and right meets design requirement; O shape circle trim ring 6 can not come off after ensureing O shape circle 7 assembling; O shape is enclosed 7 pairs of spools and is carried out side seal; Spool 9 forms the break-make that combination valve core realizes oil circuit; Enclose the assembling of 4 for the ease of small hole size lattice, combination valve core is by increasing back-up ring 10, and the version of nut 2 simplifies the assembling that small hole size lattice enclose.
Wherein, the described equal diameters on combination valve core oil groove both sides or the diameter of oil inlet end are greater than the diameter of feedback end, then the static force that combination valve core is subject to is that F static state=P feedback × S feeds back end face-F spring-F friction force.
Working process:
Spill pressure is applied to the left end of combination valve core by the feedback hole of described spool 9, when spill pressure raise the thrust formed be greater than the force of sliding friction of spring 13 precompressed compression on the right side of combination valve core and combination valve core self time, oil return promotes spool 9 and moves right, after spill pressure is elevated to setting value, fit with the corresponding end face of valve body 8 in the right side of left spool 5, O shape circle 7 simultaneously on combination valve core also combines with the corresponding end face of valve body 8, form side seal, and protective valve is after formation side seal, the effective active area that the corresponding combination valve core of valve oil-feed crosses the left step end face of oil groove reduces, right step end face active area is constant, combination valve core is made to add an application force to the right, poppet shaft is sealed more reliable, the side seal combined hole lattice of ne-leakage enclose 4 structures and realize no-leakage valve core radial seal, thus realize the disconnection completely when spill pressure rising rear fuel tank and oil return, and protection fuel tank does not raise by spill pressure to be affected.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. a hydraulic braking is met an urgent need pumping source tank drainback voltage rise protective valve, comprise O shape circle (1), a nut (2), cover plate (3), left spool (5), O shape circle trim ring (6), valve body (8), spool (9), back-up ring (10), flange (11), spring (13) and pressure regulation bung flange (14), described back-up ring (10) interference is arranged on spool (9), trim ring (6) interference of O shape circle is arranged on left spool (5), and left spool (5) flush fit is arranged on spool (9); Nut (2) is screwed on spool (9) by screw thread, fixing spacing to left spool (5); It is characterized in that: this hydraulic braking meet an urgent need pumping source tank drainback voltage rise protective valve also comprise the 2nd O shape circle (7) and hole lattice enclose (4), described 2nd O shape circle (7) left spool (5) install before assemble; Two hole lattice enclose (4) and install before back-up ring (10) and nut (2) assembling; Cover plate (3), flange (11) are arranged on valve body (8) by the first screw (12); Pressure regulation bung flange (14) is screwed onto on flange (11), and by the second screw (15) location.
2. hydraulic braking according to claim 1 is met an urgent need pumping source tank drainback voltage rise protective valve, it is characterized in that: described nut (2), hole lattice enclose the combination valve core that (4), left spool (5), O shape circle trim ring (6), the 2nd O shape circle (7), spool (9) and back-up ring (10) form described protective valve.
3. hydraulic braking according to claim 2 is met an urgent need pumping source tank drainback voltage rise protective valve; it is characterized in that: the described equal diameters on combination valve core oil groove both sides or the diameter of oil inlet end are greater than the diameter of feedback end, then the static force that combination valve core is subject to is that F static state=P feedback × S feeds back end face-F spring-F friction force.
4. hydraulic braking according to claim 1 is met an urgent need pumping source tank drainback voltage rise protective valve, it is characterized in that: spill pressure is applied to the left end of combination valve core by the feedback hole of described spool (9), when spill pressure raise the thrust formed be greater than the force of sliding friction of spring (13) precompressed compression on the right side of combination valve core and combination valve core self time, oil return promotes spool (9) and moves right, after spill pressure is elevated to setting value, fit with the corresponding end face of valve body (8) in the right side of left spool (5), the 2nd O shape circle (7) simultaneously on combination valve core also combines with the corresponding end face of valve body (8), form side seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035925.XA CN103786709B (en) | 2014-01-24 | 2014-01-24 | A kind of hydraulic brake system is met an urgent need pumping source tank drainback voltage rise protective valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035925.XA CN103786709B (en) | 2014-01-24 | 2014-01-24 | A kind of hydraulic brake system is met an urgent need pumping source tank drainback voltage rise protective valve |
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| Publication Number | Publication Date |
|---|---|
| CN103786709A CN103786709A (en) | 2014-05-14 |
| CN103786709B true CN103786709B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410035925.XA Active CN103786709B (en) | 2014-01-24 | 2014-01-24 | A kind of hydraulic brake system is met an urgent need pumping source tank drainback voltage rise protective valve |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0157371B1 (en) * | 1996-05-31 | 1998-10-15 | 김무 | Parking brake protection device of heavy equipment |
| CN201236854Y (en) * | 2008-05-19 | 2009-05-13 | 长治液压有限公司 | Control valve of hydraulic hammer |
| AU2009100917A4 (en) * | 2009-09-11 | 2009-10-22 | Johannes Nijhuis | TSVB (Tipper Body Hose Break Prevention System) |
| CN201786816U (en) * | 2010-09-03 | 2011-04-06 | 三一重工股份有限公司 | Protector for preventing over high oil return pressure of system casing |
| CN202011388U (en) * | 2010-12-30 | 2011-10-19 | 北京安期生技术有限公司 | Hydraulic auxiliary release type brake system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000046218A (en) * | 1998-07-31 | 2000-02-18 | Shin Caterpillar Mitsubishi Ltd | Pressure control valve |
-
2014
- 2014-01-24 CN CN201410035925.XA patent/CN103786709B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0157371B1 (en) * | 1996-05-31 | 1998-10-15 | 김무 | Parking brake protection device of heavy equipment |
| CN201236854Y (en) * | 2008-05-19 | 2009-05-13 | 长治液压有限公司 | Control valve of hydraulic hammer |
| AU2009100917A4 (en) * | 2009-09-11 | 2009-10-22 | Johannes Nijhuis | TSVB (Tipper Body Hose Break Prevention System) |
| CN201786816U (en) * | 2010-09-03 | 2011-04-06 | 三一重工股份有限公司 | Protector for preventing over high oil return pressure of system casing |
| CN202011388U (en) * | 2010-12-30 | 2011-10-19 | 北京安期生技术有限公司 | Hydraulic auxiliary release type brake system |
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| Publication number | Publication date |
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| CN103786709A (en) | 2014-05-14 |
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