CN102601674A - Power-off protection loop for static pressure workbench - Google Patents
Power-off protection loop for static pressure workbench Download PDFInfo
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- CN102601674A CN102601674A CN2012100784452A CN201210078445A CN102601674A CN 102601674 A CN102601674 A CN 102601674A CN 2012100784452 A CN2012100784452 A CN 2012100784452A CN 201210078445 A CN201210078445 A CN 201210078445A CN 102601674 A CN102601674 A CN 102601674A
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Abstract
The invention discloses a power-off protection loop for a static pressure workbench. The power-off protection loop comprises an oil absorption filter, a hydraulic pump, a one-way valve, a speed regulating valve and a gear oil distributor that are connected with one another in sequence, wherein the other end of the oil absorption filter is communicated with an oil tank, an energy accumulator filled with static pressure oil with the pressure being higher than the load pressure of the workbench is connected between the one-way valve and the speed regulating valve in parallel, and over-flow valve playing a role of high-pressure protection is connected between the hydraulic pump and the one-way valve. Therefore, according to the power-off protection loop for the static pressure workbench, the power-off protection for the constant-flow static pressure workbench of a heavy type vertical lathe is realized by only the simpler loop, and constant-flow static pressure oil can be continuously supplied for the static pressure workbench.
Description
Technical field
The present invention relates to hydraulic circuit, relate in particular to a kind of power-off protection loop of static pressure workbench.
Background technology
At present, the hydrostatic slideway of heavy vertical lathe adopts quantitative fuel feeding mostly.Heavy vertical lathe load is big, rotating speed is high; Outage is afterwards because effect of inertia; Workbench is taken a very long time and just can be stopped the rotation; Want to realize power-off protection to constant current static pressure workbench, just need system cut-off stop the rotation to workbench during this period of time in continue the static pressure oil that input has load pressure for workbench.Chinese patent CN2476672Y discloses a kind of capacity increasing device that is used for the hydraulic system accumulator; This patent has been installed a plug-in two logical pressure-reducing valves at the pressure hydraulic fluid port; The hydraulic oil of constant pressure is provided for system; Can apply to the power-off protection loop of constant pressure type hydrostatic slideway, but can not satisfy the demand of the quantitative fuel feeding of heavy vertical lathe constant current static pressure workbench, can not realize power-off protection constant current static pressure workbench.
Summary of the invention
Problem to above-mentioned existence; The power-off protection loop that the purpose of this invention is to provide a kind of static pressure workbench; Realized the quantitative fuel feeding of hydraulic system to constant current static pressure workbench; Also can for constant current static pressure workbench cut off the power supply stop the rotation to workbench during this period of time in continue the static pressure oil that input has load pressure, thereby realized power-off protection to constant current static pressure workbench.
The objective of the invention is to realize through following technical proposals:
A kind of power-off protection loop of static pressure workbench; Wherein, comprise the oil suction filter, hydraulic pump; Check valve; Flow speed control valve and gear separator, said oil suction filter, said hydraulic pump, said check valve, said flow speed control valve and said gear separator are connected successively, and the other end of said oil suction filter communicates with fuel tank; Be parallel with the accumulator that stores the static pressure oil that is higher than the workbench load pressure between said check valve and the said flow speed control valve, be parallel with the overflow valve of high voltage protective effect between said hydraulic pump and the said check valve.
In most preferred embodiment of the present invention, the pressure of said accumulator pressure store oil is identical with the pressure that said hydraulic pump is set up.
In most preferred embodiment of the present invention, said flow speed control valve is in series by uniform-pressure-drop valve and choke valve.
In most preferred embodiment of the present invention, said accumulator is the inflatable accumulator.
In most preferred embodiment of the present invention, said hydraulic pump is unidirectional volume adjustable hydraulic pump.
Compared with present technology, beneficial effect of the present invention is:
Just realized the power-off protection of heavy vertical lathe constant current static pressure workbench with fairly simple loop, and can continue to provide constant flow rate static pressure oil for the static pressure workbench.
Description of drawings
Fig. 1 is the structural representation in the power-off protection loop of static pressure workbench of the present invention;
Fig. 2 is the structural representation of the flow speed control valve in the power-off protection loop of static pressure workbench of the present invention.
The specific embodiment
Below in conjunction with schematic diagram and concrete operations embodiment the present invention is described further.
Fig. 1 shows the structural representation of most preferred embodiment in the power-off protection loop of static pressure workbench of the present invention; As shown in Figure 1, the power-off protection loop of static pressure workbench of the present invention comprises oil suction filter 1, hydraulic pump 2; Check valve 4; Flow speed control valve 5 and gear separator 7, oil suction filter 1, hydraulic pump 2, check valve 4, flow speed control valve 5 and gear separator 7 are connected successively, and the other end of oil suction filter 1 communicates with fuel tank 0; Be parallel with the accumulator 6 that is used to store the static pressure oil that is higher than the workbench load pressure between check valve 4 and the flow speed control valve 5, be parallel with the overflow valve 3 of high voltage protective effect between hydraulic pump 2 and the check valve 4.
Continuation is referring to shown in Figure 1, and when operate as normal, pressure oil directly gets into hydraulic pump 2 behind oil suction filter 1, and the flow speed control valve 5 of flowing through again behind the check valve 4 of flowing through gets into gear separator 7 after the decompression of process flow speed control valve and the regime flow effect.Overflow valve 3 of parallel connection plays the high voltage protective effect between hydraulic pump 2 and check valve 4; Accumulator 6 of parallel connection between check valve 4 and flow speed control valve 5; Accumulator 6 is used to store the static pressure oil that is higher than the workbench load pressure, and the pressure of accumulator 6 pressure stores oil is identical with the pressure that hydraulic pump 2 is set up.
As shown in Figure 2, flow speed control valve 5 is to be connected in series by uniform-pressure-drop valve 51 and choke valve 52.
Behind system cut-off, pressure oil flows out from accumulator 6, gets into gear separator 7 after the decompression of process flow speed control valve 5 and the regime flow effect, thereby plays the effect of power-off protection.The effect of the check valve 4 of this moment is to prevent that pressure oil is back to fuel tank.
Under the situation that does not add flow speed control valve 5 and accumulator 6, if the outage phenomenon, hydraulic pump 2 meeting fuel cut-offs do not have pressure oil input static pressure oil pocket, and the static pressure workbench are rotated further owing to inertia, and workbench will be ground wound because of producing dry friction like this.
If parallelly connected accumulator 6 in oil circuit only, the oil in reserve hydraulic coupling of accumulator 6 is identical with load pressure, behind system cut-off; Fluid can not be imported the static pressure oil pocket because of insufficient pressure; Thus it is clear that,, still do not have the effect of power-off protection if only in the loop, add accumulator 6.
If existing flow speed control valve 5 has accumulator 6 again, setting p1 as shown in Figure 2, p2, three pressure spots of p3, p1＞p2＞p3 wherein, p1 is the oil in reserve pressure pressure of accumulator, p3 is a load pressure.Pressure oil p1 through the valve port of uniform-pressure-drop valve 51, flows out through choke valve 52 valve ports earlier then.Choke valve import and export pressure oil p2, p3 are caused the two ends of uniform-pressure-drop valve spool through the valve body internal channel.In system, the load of constant current static pressure workbench changes, and just p3 changes; (p2-p3) spring force with uniform-pressure-drop valve 51 compares; Because of the pressure compensation effect of uniform-pressure-drop valve 51 valve ports, like this, even under the situation that p3 changes; Make that (p2-p3) is constant, the stability of flow of the flow speed control valve 5 of promptly flowing through.Because there are pressure reduction in p1 and p3, accumulator 6 plays auxiliary power source after outage, through having the static pressure oil of load pressure behind the flow speed control valve 5 for the lasting input of workbench, not ground wound during the rotation of protection workbench at fluid.When p1 drops to when equating with p3, accumulator 6 stops to be constant current static pressure workbench fuel feeding that the pressure reduction of p1 and p3 is big more, can make the dischargeable capacity of accumulator 6 big more.
Accumulator volume checking in the practical application:
By existing heavy vertical lathe static pressure workbench hydraulic parameter commonly used; The required flow Q=60L/min of hydrostatic slideway; If pump discharge pressure P1=6.5Mpa, P3=2.5MPa (P3 is a maximum load pressure, be certain among a small circle in dynamic change; Get P3 according to empirical value here and be 2.5MPa to the maximum), the brake time after the outage is 10S.
The dischargeable capacity Vx=Qt=60 of accumulator 6 * 10/60=10L then, P3=2.5Mpa, the blowing pressure P0=accumulator volumetric efficiency * P3 of accumulator 6 leather bags, the accumulator volumetric efficiency gets 0.8 here.
So volume of accumulator 6
Result of calculation is 23L, is the accumulator of 25L so can select nominal volume.
To sum up, the power-off protection of heavy vertical lathe constant current static pressure workbench has just been realized with fairly simple loop in the power-off protection loop of static pressure workbench of the present invention, and can continue to provide constant flow rate static pressure oil for the static pressure workbench.
More than specific embodiment of the present invention is described in detail, but the present invention is not restricted to the specific embodiment of above description, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (5)
1. the power-off protection loop of a static pressure workbench; It is characterized in that; Comprise oil suction filter (1); Hydraulic pump (2), check valve (4), flow speed control valve (5) and gear separator (7); Said oil suction filter (1), said hydraulic pump (2), said check valve (4), said flow speed control valve (5) and said gear separator (7) are connected successively; The other end of said oil suction filter (1) communicates with fuel tank (0), is parallel with the accumulator (6) that stores the static pressure oil that is higher than the workbench load pressure between said check valve (4) and the said flow speed control valve (5), has been parallel with the overflow valve (3) of high voltage protective effect between said hydraulic pump (2) and the said check valve (4).
2. the power-off protection loop of static pressure workbench as claimed in claim 1 is characterized in that, the pressure of said accumulator (6) pressure store oil is identical with the pressure that said hydraulic pump (2) is set up.
3. the power-off protection loop of static pressure workbench as claimed in claim 1 is characterized in that, said flow speed control valve (5) is in series by uniform-pressure-drop valve (51) and choke valve (52).
4. the power-off protection loop of static pressure workbench as claimed in claim 1 is characterized in that, said accumulator (6) is the inflatable accumulator.
5. the power-off protection loop of static pressure workbench as claimed in claim 1 is characterized in that, said hydraulic pump (2) is unidirectional volume adjustable hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100784452A CN102601674A (en) | 2012-03-22 | 2012-03-22 | Power-off protection loop for static pressure workbench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100784452A CN102601674A (en) | 2012-03-22 | 2012-03-22 | Power-off protection loop for static pressure workbench |
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| CN2012100784452A Pending CN102601674A (en) | 2012-03-22 | 2012-03-22 | Power-off protection loop for static pressure workbench |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358995A (en) * | 2014-09-26 | 2015-02-18 | 洛阳中重自动化工程有限责任公司 | Emergency oil supply hydraulic station for large-scale mill |
| CN105215692A (en) * | 2015-11-09 | 2016-01-06 | 深圳市金汇丰精密机械有限公司 | One can bear eccentric load static pressure rotary worktable and method of controlling rotation thereof |
| CN116160261A (en) * | 2023-04-21 | 2023-05-26 | 江苏领臣精密机械有限公司 | Protection mechanism of hydrostatic guideway |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866641A (en) * | 1981-10-13 | 1983-04-20 | Nachi Fujikoshi Corp | Fine feed device of spindle in machine tool |
| CN2426562Y (en) * | 2000-05-26 | 2001-04-11 | 攀钢集团矿业公司 | Static-pressure bearing lubricating device |
| CN2476672Y (en) * | 2001-03-30 | 2002-02-13 | 沈阳液压件厂 | Volume increasing device of accumulator in hydraulic system |
| CN101475130A (en) * | 2009-01-22 | 2009-07-08 | 重庆键英液压机电有限公司 | Hydraulic time-delay double-stage braking hoister hydraulic station |
| CN201461392U (en) * | 2009-06-09 | 2010-05-12 | 上海海事大学 | Two-way double-acting blade pump |
| CN201534283U (en) * | 2009-11-24 | 2010-07-28 | 天津市精诚机床制造有限公司 | Hydrostatic rail hydraulic system for revolving workbench of heavy numerical control cylindrical gear milling machine |
| CN101900163A (en) * | 2010-07-14 | 2010-12-01 | 武汉重型机床集团有限公司 | Frequency-conversion constant-current hydrostatic bearing |
| CN102108834A (en) * | 2009-12-24 | 2011-06-29 | 深圳市普隆重工有限公司 | Rock drilling machine |
-
2012
- 2012-03-22 CN CN2012100784452A patent/CN102601674A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866641A (en) * | 1981-10-13 | 1983-04-20 | Nachi Fujikoshi Corp | Fine feed device of spindle in machine tool |
| CN2426562Y (en) * | 2000-05-26 | 2001-04-11 | 攀钢集团矿业公司 | Static-pressure bearing lubricating device |
| CN2476672Y (en) * | 2001-03-30 | 2002-02-13 | 沈阳液压件厂 | Volume increasing device of accumulator in hydraulic system |
| CN101475130A (en) * | 2009-01-22 | 2009-07-08 | 重庆键英液压机电有限公司 | Hydraulic time-delay double-stage braking hoister hydraulic station |
| CN201461392U (en) * | 2009-06-09 | 2010-05-12 | 上海海事大学 | Two-way double-acting blade pump |
| CN201534283U (en) * | 2009-11-24 | 2010-07-28 | 天津市精诚机床制造有限公司 | Hydrostatic rail hydraulic system for revolving workbench of heavy numerical control cylindrical gear milling machine |
| CN102108834A (en) * | 2009-12-24 | 2011-06-29 | 深圳市普隆重工有限公司 | Rock drilling machine |
| CN101900163A (en) * | 2010-07-14 | 2010-12-01 | 武汉重型机床集团有限公司 | Frequency-conversion constant-current hydrostatic bearing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358995A (en) * | 2014-09-26 | 2015-02-18 | 洛阳中重自动化工程有限责任公司 | Emergency oil supply hydraulic station for large-scale mill |
| CN105215692A (en) * | 2015-11-09 | 2016-01-06 | 深圳市金汇丰精密机械有限公司 | One can bear eccentric load static pressure rotary worktable and method of controlling rotation thereof |
| CN116160261A (en) * | 2023-04-21 | 2023-05-26 | 江苏领臣精密机械有限公司 | Protection mechanism of hydrostatic guideway |
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Application publication date: 20120725 |