CN103334975B - A kind of press charging device of multiple flow passages complex controll - Google Patents
A kind of press charging device of multiple flow passages complex controll Download PDFInfo
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- CN103334975B CN103334975B CN201310242722.3A CN201310242722A CN103334975B CN 103334975 B CN103334975 B CN 103334975B CN 201310242722 A CN201310242722 A CN 201310242722A CN 103334975 B CN103334975 B CN 103334975B
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Abstract
The press charging device of a kind of multiple flow passages complex controll of the present invention, its structure outline is, comprise spool, valve body and composite oil cylinder, wherein valve body is arranged in valve pocket, outer topping up passage is spaced apart between valve body and valve pocket outer wall, valve shut on valve body lives this passage, spool is arranged on valve inner, the valve body of spool lower end has the center flow channels of through hole shape, the valve body of spool periphery has poroid drainage channel, composite oil cylinder has a plurality of chamber, wherein two ends are respectively rod chamber and lower rod chamber, upper piston rod and the valve body of upper rod chamber are connected, lower piston rod and the spool of lower rod chamber are connected, through the driving of composite oil cylinder lower piston rod, spool lifts, central passage and drainage channel circulate and form internal-filling liquid passage, through the driving of composite oil cylinder lower piston rod, valve body moves down, valve open, outer topping up passage is opened.Advantage of the present invention is that system works is more rapid, and avoid off-load and impact, stability is strong, Security is high.
Description
Technical field
The present invention relates to the charging device of hydraulic system of press, particularly relates to a kind of press charging device of multiple flow passages complex controll.
Background technique
In great tonnage hydraulic machine, charging device (especially liquid-filling valve) is one of core parts ensureing efficient compacting and high yield.When moved cross beam fast downlink, the oil in low pressure topping up case flows rapidly into master cylinder through this device; When moved cross beam quick return, after the high pressure oil release in main oil cylinder piston chamber, enter low pressure topping up case fast through this device.The F.F. of master cylinder, pressurize, the action such as release and backhaul all must have charging device to participate in, therefore the structure of charging device and flow channel shape control and backhaul high stability important in inhibiting fast to the idle running improving press, and directly have influence on the key technical indexes of hydraulic press.
The design of current charging device, mainly launches round enhancing reliability and efficient stable feed flow two aspect.In reliability enhancing, split-type design mainly through charging device improves interchangeability to simplify dismounting and maintenance (as referenced patent 200710009554.8), or preferred charging device mounting point is to avoid high stress concentrations region (as referenced patent 201220448669.3).In efficient stable feed flow, match mainly through the external frame of charging device upper end and topping up case Internal periphery and form guide channel to promote topping up speed (as referenced patent WO02062545A1), or add damping hole (as referenced patent 200520069161.2) in charging device inside and realize master cylinder high pressure oil to the single-stage guide release in topping up tank drainback process, instantaneous high pressure when opening to avoid charging device impacts.Existing Patent design contributes to reducing valve body to be destroyed and strengthens the Rapid Stability of feed flow, but there are following some shortcomings, and main manifestations is:
1) lifting of topping up speed runs into bottleneck.Topping up speed directly affects the movement velocity of master cylinder and the net cycle time of press, is one of key factor determining press (especially the little fireballing ceramic press of stroke) working efficiency.Current topping up spool promotes flow velocity mainly through external frame design, and as adopted the diversion Design of mushroom-shaped cone valve structure and spool face, this mode is existing defects in large discharge topping up.For large discharge press, the size of topping up spool often increases with the rising of flow, and large size spool but becomes the major obstacle intercepted in fluid flowing, and the further lifting of topping up speed encounters bottleneck.
2) stability of high-voltage oil cylinder quick return process is not enough.In master cylinder backhaul, for avoiding charging device to open the oily thump brought of instantaneous pressure, often utilizing external a series of off-load element master cylinder pressure to be reduced to safety value and opening topping up spool again.This mode increases cost and system complex, under high pressure opens will bring serious destruction if automatically controlled error causes charging device.The pilot valve (as referenced patent 200520069161.2) of band damping hole is added in charging device inside, avoid the adverse effect that the additional release stage brings, improve the rapidity of master cylinder backhaul, but there is the problems such as pressure unloading poor controllability, release stability is not enough.
Summary of the invention
The object of the invention is to provide a kind of press charging device being realized the multiple flow passages complex controll of topping up and fast and stable backhaul fast under large discharge by the three-dimensional multiple flow passages topping up of large size, a further object of the present invention is the backhaul being made high-voltage oil cylinder fast and stable more by multistage oil return damping structure, thus is particularly useful for the compacting operating mode of high-pressure high-flow.
The object of the invention is to be realized by following approach.
A kind of press charging device of multiple flow passages complex controll, the charging device arranged between topping up case and master cylinder, its composition main points are: charging device comprises spool, valve body and composite oil cylinder, wherein valve body is arranged in valve pocket, outer topping up passage is spaced apart between valve body and valve pocket outer wall, valve shut on valve body lives this passage, spool is arranged on valve inner, the valve body of spool lower end has the center flow channels of through hole shape, the valve body of spool periphery has poroid drainage channel, composite oil cylinder has a plurality of chamber, wherein two ends are respectively rod chamber and lower rod chamber, upper piston rod and the valve body of upper rod chamber are connected, lower piston rod and the spool of lower rod chamber are connected, by the driving of composite oil cylinder lower piston rod, spool lifts, central passage and drainage channel circulate and form internal-filling liquid passage, by the driving of composite oil cylinder upper piston rod, valve body moves down, valve open, outer topping up passage is opened.
Like this, on the basis of the outer topping up passage of routine, increase internal-filling liquid passage, two topping up passage order are opened, the corresponding sectional area reducing each topping up passage simultaneously, make the sectional area of single topping up passage less, and sectional area after the superposition of two topping up passages is comparatively large, realizes topping up and fast and stable backhaul fast under large discharge.This has liquid handling capability more efficiently than traditional single channel topping up pattern.
Object of the present invention can also be realized by following approach.
Composite oil cylinder has three chambeies, wherein go up rod chamber to be connected with the first pipeline A with lower rod chamber simultaneously, middle rodless cavity is connected with the second pipeline B, when master cylinder needs topping up, by external selector valve action, make high-voltage oil liquid enter upper rod chamber and lower rod chamber via the first pipeline A, the liquid in middle rodless cavity is then outwards exported by the second pipeline B.
The sectional area of internal-filling liquid passage is less than the sectional area of outer topping up passage.
Spool lower surface has stair-stepping spool ladder surface, this ladder is plural level ladder, the drainage channel periphery of valve body has stair-stepping valve body ladder surface, between spool side direction ladder surface and valve body side direction ladder surface, there is gap, a plurality of side direction slit-shaped of this plural level ladder pluralize an oil return damping, wherein the oil return damping of the top is the first oil return damping and down sequence successively, and the vertical ladder surface of spool is sat and is combined on the corresponding vertical ladder surface of valve body.
Like this, form multistage oil return damping by the coupling of spool ladder surface and valve body ladder surface, the gap thickness that wherein the two cooperation is formed is
δ 1,
δ 2,
δ 3, the chinky altitude formed between two ladder surface two vertical surface
d 1,
d 2,
d 3Enter oral fluid to flow through these dampings and form out oral fluid stream, and finally enter topping up case.In fact this chinky altitude is exactly the length in gap.The gap of the top is the first chinky altitude
d 1,down the second chinky altitude successively respectively
d 2, the 3rd chinky altitude
d 3.corresponding gap thickness is also followed successively by the first gap thickness
δ 1, the second gap thickness
δ 2, and the 3rd gap thickness
δ 3.
Enter oral fluid stream and go out the multistage oil return damping between oral fluid stream, can be understood as and be in series by multiple liquid resistances such as the first liquid resistance, the second liquid resistance and the 3rd liquid resistances.Because gap causes resistance large when fluid flows through this region, namely play the effect of liquid resistance.
In concrete enforcement, between two vertical surface, form the height in gap
d 1,
d 2,
d 3numerical value choose very crucial, preferably the first chinky altitude
d 1< second chinky altitude
d 2< the 3rd chinky altitude
d 3.
These liquid resistance reduces gradually with spool moves.Time initial, be in three grades of liquid resistances or multistage liquid resistance stage, spool greatly and is slowly opened because promoting resistance, and the pressure in master cylinder constantly declines.Move with on spool, chinky altitude
d i reducing gradually, being greater than when spool moving distance
d 1time, the first liquid resistance was lost efficacy, and entered the twin-stage liquid resistance stage; Be greater than when spool moving distance
d 2, the second liquid resistance was lost efficacy, and enter the single-stage liquid resistance stage, spool promotes rapidly.The further lifting of final spool causes the 3rd liquid resistance to be lost efficacy, therefore master cylinder internal pressure effectively discharges, enter the aneroid resistance stage, this impels the fluid promotion valve body entering rod chamber to move downward, and master cylinder inner fluid enters topping up case by inside and outside passage rapidly.Thus, by multistage oil return damping, the master cylinder motion state of the initial stage that achieves multistage release, later stage quick return controls.
Being preferably as follows further ladder surface:
The ladder of spool ladder surface and valve body ladder surface is 1 ~ 10 grade.
The thickness in gap
δsize be 0.2 ~ 8mm.
Have valve core through hole between spool upper surface and lower surface, valve core through hole is communicated with spool epicoele and center flow channels, and the area of spool epicoele is greater than the area of center flow channels.
Cavity on spool upper end portion and valve pocket between roof is spool epicoele.
Under the steady state that master cylinder does not move, master cylinder is connected with spool epicoele by valve core through hole, and the pressure of the two is
p 2.Area due to spool epicoele is greater than the area of center flow channels, and total force downwards and spool 7 is closed.And easily control spool epicoele and center flow channels difference in areas, correspond that to promote the power that spool moves upward then less, only need overcome the pressure product in spool epicoele and center flow channels difference in areas and master cylinder.By the input pressure of reasonable set first pipeline A mouth, can ensure that spool is static and spool moves upward.
The aperture of valve core through hole is 1 ~ 20mm.
Damping hole can be set in valve core through hole.
Hydraulic control 2/2-way valve is provided with in spool, the left position spring chamber that its runner connects connects drainage channel, the right position control chamber that its runner disconnects connects center flow channels, during topping up, because hydraulic control 2/2-way valve both sides control chamber is low pressure, then this valve is in left position and on-state under spring force, and now spool epicoele is communicated with center flow channels, suppress the pressure that spool moves to discharge rapidly in spool epicoele, spool is opened rapider; Need in off-load backhaul at master cylinder, because master cylinder exists high pressure, hydraulic control 2/2-way valve is in right position and off state under high voltage control effect, and now this runner is inoperative.
In the inoperative situation of above-mentioned this runner of hydraulic control 2/2-way valve, realize stablizing by means of only valve core through hole and damping hole during guarantee release and unload pressure-controlled.This preferred version, can ensure that topping up operating mode spool is opened fast simultaneously, and the release of release backhaul stable conditions.
Spool epicoele is connected with a kind of relief valve.
Like this, without the need to the safety valve of external large discharge, when system pressure is excessive, this relief valve can play safety protection effect, thus strengthens reliability and the Security of technical solution of the present invention.
Composite oil cylinder is fixed in the frame that topping up case is inner or press is outside.
The isolation zone of through hole column is provided with in the middle rodless cavity of composite oil cylinder.
In sum, the present invention compared to existing technology tool have the following advantages:
1) by the three-dimensional flow passage structure of large size, the bottleneck that topping up speed promotes is broken through.Utilize the composite oil cylinder of charging device and the design of internal structure, realize valve core inside and outside three-dimensional feed flow, broken away from tradition and only utilized the flow of outside runner topping up to limit to, be particularly useful for the quick topping up under super-flow and large scale spool.
2) possess multistage oil return damping structure, high-voltage oil cylinder backhaul fast and good stability.By arranging the Multi-stage damping of optimization in oil-returning structure, the high pressure in backhaul in master cylinder being stablized and discharges fast.The program is because making system works more rapid without the need to external off-load, avoid off-load and impact, system is succinct, stability is strong, Security is high.
Accompanying drawing explanation
Fig. 1 is the rough schematic view that the press charging device of a kind of multiple flow passages complex controll of the present invention assembles mutually with press.
Fig. 2 is the schematic diagram of the press charging device internal structure of a kind of multiple flow passages complex controll described in preferred embodiment.
Fig. 3 is the press charging device that the characterizes a kind of multiple flow passages complex controll of the present invention schematic diagram in topping up state.
The position relationship of spool and valve body when Fig. 4 is the press charging device master cylinder release characterizing a kind of multiple flow passages complex controll of the present invention.
Fig. 5 is the A direction view in Fig. 4.
Fig. 6 is that liquid when characterizing master cylinder release between valve body ladder surface and spool ladder surface hinders distribution schematic diagram.
Fig. 7 is the schematic diagram of change procedure step by step of liquid resistance when characterizing master cylinder release.
Fig. 8 is the hydrovalve connection diagram of the press charging device of a kind of multiple flow passages complex controll described in preferred embodiment.
In figure: 1, hydraulic press, 2, topping up case, 3, charging device, 4, master cylinder, 5, master cylinder piston, 6, composite oil cylinder, 6A, upper rod chamber, 6B, middle rodless cavity, 6C, lower rod chamber, 6D, upper piston rod, 6E, lower piston rod, 6F, isolation zone, 7, spool, 7A, through hole, 7B, damping hole, 7C, spool ladder surface, 8, valve body, 8A, drainage channel, 8B, center flow channels, 8C, valve body ladder surface, 9, spool epicoele, 10, main oil gallery, 11, internal-filling liquid passage, 12, outer topping up passage, 13, enter oral fluid stream, 14, go out oral fluid stream, 15, first liquid resistance, 16, second liquid resistance, 17, 3rd liquid resistance, 18, three grades of liquid resistances, 19, twin-stage liquid hinders, 20, single-stage liquid hinders, 21, aneroid hinders, 22, hydraulic control 2/2-way valve, 23, relief valve.
Embodiment
Most preferred embodiment:
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described.
The assembling of charging device in hydraulic press of embodiment of the present invention is schematically illustrated with reference to Fig. 1, Fig. 1.The charging device 3 arranged between topping up case 2 and master cylinder 4, can use, and play a significant role in master cylinder topping up and backhaul two main operating modes in equipment such as hydraulic press 1 grade.In filling process, charging device 3 moves downward, and falls with master cylinder 4, and the liquid in topping up case 2 enters master cylinder 4 via the charging device 3 opened fast.Need after completing suppression process to carry out master cylinder 4 backhaul, the high pressure in master cylinder 4 first sheds by this process need, opens charging device 3 subsequently and is back in topping up case 2 by its inner fluid rapidly by master cylinder 4 is up.
The schematic diagram of charging device 3 internal structure of embodiment of the present invention is schematically illustrated with reference to Fig. 2, Fig. 2.
Charging device 3 comprises spool 7, valve body 8 and composite oil cylinder 6, wherein: it is inner that spool 7 is arranged on valve body 8, the valve body 8 of spool 7 lower end has the center flow channels 8B of through hole shape, the valve body 8 of spool 7 periphery has poroid drainage channel 8A; Composite oil cylinder 6 is made up of 3 ~ 5 chambeies, and centre is middle rodless cavity 6B, and two ends are that upper piston rod 6D and the valve body 8 of upper rod chamber 6A and lower rod chamber 6C, upper rod chamber 6A is connected, and lower piston rod 6E and the spool 7 of lower rod chamber 6C are connected.It is inner that composite oil cylinder 6 is fixed on topping up case 2.The isolation zone 6F of through hole column is provided with, to avoid the collision of upper piston rod 6D and lower piston rod 6E in the middle rodless cavity 6B of composite oil cylinder 6.
Spool 7 lower surface has stair-stepping spool ladder surface 7C, and the drainage channel 8A periphery of valve body 8 has stair-stepping valve body ladder surface 8C.
The ladder of spool ladder surface 7C and valve body ladder surface 8C is 3 grades.
When spool ladder surface 7C and valve body ladder surface 8C cooperatively interacts, there is gap between corresponding stepped surfaces, the thickness in gap
δsize be 0.2 ~ 8mm.
Have valve core through hole 7A between spool 7 upper surface and lower surface, valve core through hole 7A is communicated with spool epicoele 9 and center flow channels 8B, and the area of spool epicoele 9 is greater than the area of center flow channels 8B.The aperture of valve core through hole 7A is 1 ~ 20mm.Valve core through hole 7A inside is provided with damping hole 7B.
Under the steady state that master cylinder does not move, master cylinder 4 by through hole 7A and on damping hole 7B be connected with spool epicoele 9, the pressure of the two is
p 2.Area due to spool epicoele 9 is greater than the area of center flow channels 8B, and total force downwards and spool 7 is closed.
The schematic diagram of three-dimensional filling process is characterized with reference to Fig. 3, Fig. 3.Composite oil cylinder 6 has three chambeies, and wherein go up rod chamber 6A and be connected with the first pipeline A with lower rod chamber 6C simultaneously, middle rodless cavity 6B is connected with the second pipeline B.When master cylinder 4 needs topping up, by external selector valve action, make high-voltage oil liquid enter upper rod chamber 6A and lower rod chamber 6C via the first pipeline A, the liquid in middle rodless cavity 6B is then outwards exported by the second pipeline B.In enforcement, the cylinder body of composite oil cylinder 6 is fixed in topping up case 2, therefore the fluid entering upper rod chamber 6A by the first pipeline A promotes upper piston rod 6D and moves downward, the valve body 8 be fixed together with it also moves downward thereupon, and this impels the liquid in topping up case 2 to flow to master cylinder 4 through outer topping up passage 12.Meanwhile, under the first pipeline A enters fluid, the fluid of rod chamber 6C promotes lower piston rod 6E and the spool 7 that is connected moves upward.What spool 7 moved upward and moves downward with valve body 8 synchronously carries out, make to form internal-filling liquid passage 11 rapidly between spool 7 and valve body 8, the internal-filling liquid runner 11 of valve core inside and center flow channels 8B define a brand-new topping up runner, and this has liquid handling capability more efficiently than traditional single channel topping up pattern.
With reference to Fig. 4, Fig. 5, the position relationship of spool and valve body when Fig. 4 and Fig. 5 characterizes master cylinder release.After hydraulic press completes predetermined work, need the upwards backhaul carrying out master cylinder after being shed by the high pressure in master cylinder 4 again.Similar with filling process, to the pipeline A oil-feed of composite oil cylinder 6, need be formed thus and impel two-part thrust of spool 7 moving and moving down with valve body 8 during master cylinder 4 release.Now, be in high pressure conditions in master cylinder 4, spool 8 makes it close by the effect of master cylinder 4 inner high voltage oil, and this power is larger; Correspond that to promote the power that moves upward of spool 7 then less, only need overcome the pressure product in spool epicoele 9 and center flow channels 8B difference in areas and master cylinder 2.By the input pressure of reasonable set first pipeline A mouth, can ensure that spool 8 is static and spool 7 moves upward.
For realizing stable off-load fast, stair-stepping spool ladder surface 7C being set at the lower surface of spool 7, and valve body ladder surface 8C is set at valve body 8 corresponding position with matching.Form multistage oil return damping by the coupling of spool ladder surface 7C and valve body ladder surface 8C, the gap thickness that wherein the two cooperation is formed is
δ 1,
δ 2,
δ 3, the chinky altitude that two ladder surfaces are formed
d 1,
d 2,
d 3Enter oral fluid stream 13 and form out oral fluid stream 14 through these dampings, and finally enter topping up case 2.
With reference to Fig. 6, Fig. 7, liquid resistance of the present invention and change procedure thereof during the sign master cylinder release of Fig. 6 ~ 7.Enter oral fluid stream 13 and go out the multistage oil return damping between oral fluid stream 14, can be understood as and be in series by multiple liquid resistances such as the first liquid resistance 15, second liquid resistance 16 and the 3rd liquid resistances 17.For the 3rd liquid resistance 17, form small gap between the vertical surface of spool 7 and valve body 8, when fluid flows through this region, resistance is large, namely plays the effect of liquid resistance.
In concrete enforcement, between two vertical surface, form the height in gap
d 1,
d 2,
d 3numerical value choose very crucial, preferably
d 1<
d 2<
d 3, as shown in Figure 6, the resistance of these liquid reduces gradually with spool 7 moves in the multistage liquid resistance of formation.Time initial, be in three grades of liquid and hindered for 18 stages, spool 7 greatly and is slowly opened because promoting resistance, and the pressure in master cylinder 4 constantly declines.Move with on spool 7, chinky altitude
d i reduce gradually,
i=1,2,3 ...Be greater than when spool 7 moves distance
d 1time, the first liquid resistance 15 was lost efficacy, and entered bipolar liquid and hindered for 19 stages; Be greater than when spool 7 moves distance
d 2, the second liquid resistance 16 was lost efficacy, and enter one pole liquid and hindered for 20 stages, spool promotes rapidly.The further lifting of final spool 7 causes the 3rd liquid resistance 17 to be lost efficacy, therefore master cylinder 4 internal pressure effectively discharges, enter aneroid and hindered for 21 stages, this impels the fluid promotion valve body 8 entering rod chamber 6A to move downward, and master cylinder 4 inner fluid enters topping up case 2 by inside and outside passage rapidly.Thus, by multistage oil return damping, the master cylinder motion state of the initial stage that achieves multistage release, later stage quick return controls.
With reference to Fig. 8, be provided with hydraulic control 2/2-way valve 22 in spool 7, a chamber of hydraulic control 2/2-way valve 22 meets drainage channel 8A, and another chamber meets center flow channels 8B.Relief valve 23 is connected with the spool epicoele 9 of valve body 8 Inner Constitution above spool 7.
In order to strengthen the rapidity of fluid flowing further, can increase a hydraulic control 2/2-way valve 22 in spool 7, the left position spring chamber that its runner connects meets drainage channel 8A, and the right position control chamber that its runner disconnects meets center flow channels 8B.During topping up, because hydraulic control 2/2-way valve 22 both sides control chamber is low pressure, then this valve is in left position and on-state under spring force, and now spool epicoele 9 is communicated with center flow channels 8B, suppress the pressure that spool 7 moves to discharge rapidly in spool epicoele 9, spool is opened rapider.Need in off-load backhaul at master cylinder 4, because master cylinder exists high pressure, 2/2-way valve 22 is in right position and off state under high voltage control effect, and now this runner is inoperative, unloads pressure-controlled when ensureing release by means of only damping hole 7B realization is stable.This preferred embodiment, can ensure that topping up operating mode spool 7 is opened fast simultaneously, and the release of release backhaul stable conditions.Except connecing hydraulic control 2/2-way valve 22; for strengthening reliability and the Security of work, a relief valve 23 can be connected at spool epicoele 9, playing safety protection effect when system pressure is excessive; without the need to the safety valve of external large discharge, adaptability of the present invention can be strengthened further.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (14)
1. the press charging device of a multiple flow passages complex controll, the charging device arranged between topping up case and master cylinder, it is characterized in that, charging device comprises spool, valve body and composite oil cylinder, wherein valve body is arranged in valve pocket, outer topping up passage is spaced apart between valve body and valve pocket outer wall, valve shut on valve body lives this passage, spool is arranged on valve inner, the valve body of spool lower end has the center flow channels of through hole shape, the valve body of spool periphery has poroid drainage channel, composite oil cylinder has a plurality of chamber, wherein two ends are respectively rod chamber and lower rod chamber, upper piston rod and the valve body of upper rod chamber are connected, lower piston rod and the spool of lower rod chamber are connected, by the driving of composite oil cylinder lower piston rod, spool lifts, central passage and drainage channel circulate and form internal-filling liquid passage, by the driving of composite oil cylinder upper piston rod, valve body moves down, valve open, outer topping up passage is opened.
2. the press charging device of a kind of multiple flow passages complex controll according to claim 1, it is characterized in that, composite oil cylinder has three chambeies, wherein go up rod chamber to be connected with the first pipeline A with lower rod chamber simultaneously, middle rodless cavity is connected with the second pipeline B, when master cylinder needs topping up, by external selector valve action, make high-voltage oil liquid enter upper rod chamber and lower rod chamber via the first pipeline A, the liquid in middle rodless cavity is then outwards exported by the second pipeline B.
3. the press charging device of a kind of multiple flow passages complex controll according to claim 1, is characterized in that, the sectional area of internal-filling liquid passage is less than the sectional area of outer topping up passage.
4. the press charging device of a kind of multiple flow passages complex controll according to claim 1, it is characterized in that, spool lower surface has stair-stepping spool ladder surface, this ladder is plural level ladder, the drainage channel periphery of valve body has stair-stepping valve body ladder surface, between spool side direction ladder surface and valve body side direction ladder surface, there is gap, a plurality of side direction slit-shaped of this plural level ladder pluralize an oil return damping, wherein the oil return damping of the top is the first oil return damping and down sequence successively, and the vertical ladder surface of spool is sat and is combined on the corresponding vertical ladder surface of valve body.
5. the press charging device of a kind of multiple flow passages complex controll according to claim 4, is characterized in that, the ladder of spool ladder surface and valve body ladder surface is 1 ~ 10 grade, and the gap of the top is the first chinky altitude
d 1, be down the second chinky altitude respectively successively
d 2, the 3rd chinky altitude
d 3, corresponding gap thickness is also followed successively by the first gap thickness
δ 1, the second gap thickness
δ 2, and the 3rd gap thickness
δ 3, wherein the first chinky altitude
d 1value maximum, gradually reduce thereafter, the value of the chinky altitude of afterbody is minimum.
6. the press charging device of a kind of multiple flow passages complex controll according to claim 5, is characterized in that, the ladder of spool ladder surface and valve body ladder surface is 3 grades, the first chinky altitude
d 1< second chinky altitude
d 2< the 3rd chinky altitude
d 3.
7. the press charging device of a kind of multiple flow passages complex controll according to claim 5, is characterized in that, the thickness in gap
δsize be 0.2 ~ 8mm.
8. the press charging device of a kind of multiple flow passages complex controll according to claim 1, it is characterized in that, have valve core through hole between spool upper surface and lower surface, valve core through hole is communicated with spool epicoele and center flow channels, and the area of spool epicoele is greater than the area of center flow channels.
9. the press charging device of a kind of multiple flow passages complex controll according to claim 8, is characterized in that, the aperture of valve core through hole is 1 ~ 20mm.
10. the press charging device of a kind of multiple flow passages complex controll according to claim 8 or claim 9, is characterized in that, can arrange damping hole in valve core through hole.
The press charging device of 11. a kind of multiple flow passages complex controll according to claim 1, it is characterized in that, hydraulic control 2/2-way valve is provided with in spool, the left position spring chamber that its runner connects connects drainage channel, the right position control chamber that its runner disconnects connects center flow channels, during topping up, because hydraulic control 2/2-way valve both sides control chamber is low pressure, then this valve is in left position and on-state under spring force, now spool epicoele is communicated with center flow channels, suppress the pressure that spool moves to discharge rapidly in spool epicoele, spool is opened rapider; Need in off-load backhaul at master cylinder, because master cylinder exists high pressure, hydraulic control 2/2-way valve is in right position and off state under high voltage control effect, and now this runner is inoperative.
The press charging device of 12. a kind of multiple flow passages complex controll according to claim 1, it is characterized in that, spool epicoele is connected with a kind of relief valve.
The press charging device of 13. a kind of multiple flow passages complex controll according to claim 1, is characterized in that, composite oil cylinder is fixed in the frame that topping up case is inner or press is outside.
The press charging device of 14. a kind of multiple flow passages complex controll according to claim 2, is characterized in that, be provided with the isolation zone of through hole column in the middle rodless cavity of composite oil cylinder.
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| CN108407049B (en) * | 2018-06-01 | 2023-09-01 | 江西海源复合材料科技股份有限公司 | Upper beam structure of winding hydraulic machine |
| US11199268B2 (en) * | 2019-11-21 | 2021-12-14 | Ckd Corporation | Fluid control valve |
| CN112060670B (en) * | 2020-08-13 | 2022-05-24 | 山东森特克液压有限公司 | Flow and pressure control device of hydraulic machine |
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| GB1351278A (en) * | 1972-02-10 | 1974-04-24 | Schuler Gmbh L | Overload protection for presses |
| CN2188474Y (en) * | 1994-01-08 | 1995-02-01 | 福州海源石材机械有限公司 | Hydraulic amplifier for presser |
| CN102518623A (en) * | 2011-12-01 | 2012-06-27 | 南京埃尔法电液技术有限公司 | Plug-in mounting type charging valve |
| CN202946469U (en) * | 2012-12-08 | 2013-05-22 | 宁波佳比佳工贸有限公司 | Vibration attenuating and silencing prefill valve |
| CN203321920U (en) * | 2013-06-18 | 2013-12-04 | 福建海源自动化机械股份有限公司 | Multi-flow passage compound controlled press liquid filling device |
-
2013
- 2013-06-18 CN CN201310242722.3A patent/CN103334975B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1351278A (en) * | 1972-02-10 | 1974-04-24 | Schuler Gmbh L | Overload protection for presses |
| CN2188474Y (en) * | 1994-01-08 | 1995-02-01 | 福州海源石材机械有限公司 | Hydraulic amplifier for presser |
| CN102518623A (en) * | 2011-12-01 | 2012-06-27 | 南京埃尔法电液技术有限公司 | Plug-in mounting type charging valve |
| CN202946469U (en) * | 2012-12-08 | 2013-05-22 | 宁波佳比佳工贸有限公司 | Vibration attenuating and silencing prefill valve |
| CN203321920U (en) * | 2013-06-18 | 2013-12-04 | 福建海源自动化机械股份有限公司 | Multi-flow passage compound controlled press liquid filling device |
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| Publication number | Publication date |
|---|---|
| CN103334975A (en) | 2013-10-02 |
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