CN103334975A - Multi-runner compound-control compressor charging device - Google Patents
Multi-runner compound-control compressor charging device Download PDFInfo
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- CN103334975A CN103334975A CN2013102427223A CN201310242722A CN103334975A CN 103334975 A CN103334975 A CN 103334975A CN 2013102427223 A CN2013102427223 A CN 2013102427223A CN 201310242722 A CN201310242722 A CN 201310242722A CN 103334975 A CN103334975 A CN 103334975A
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Abstract
The invention relates to a multi-runner compound-control compressor charging device, which is characterized by comprising a valve core, a valve body and a compound oil cylinder, wherein the valve body is installed in a valve cavity, a gap between the valve body and the outer wall of the valve cavity is an outer charging channel, and a valve on the valve body closes the channel; the valve core is installed in the valve body, and through-hole-shaped center runners are formed in the valve body of the lower end of the valve core; hole-shaped drainage channels are formed in the valve body of the periphery of the valve core; the compound oil cylinder is provided with a plurality of cavities, and the cavities at two ends are respectively an upper rod cavity and a lower rod cavity; the upper piston rod of the upper rod cavity is fixedly connected with the valve body, and the lower piston rod of the lower rod cavity is fixedly connected with the valve core; through the driving of the lower piston rod of the compound oil cylinder, the valve core is lifted up, the center runners and the drainage channels form an inner charging channel; and through the driving of the lower piston rod of the compound oil cylinder, the valve body moves down, the valve is opened, and the outer charging channel is opened. The multi-runner compound-control compressor charging device has the advantages that the system work is quicker, the unloading impact is avoided, the stability is strong, and the safety is high.
Description
Technical field
The present invention relates to the charging device of hydraulic system of press, particularly relates to the press charging device of the compound control in a kind of multithread road.
Background technique
In the large-tonnage hydraulic press, charging device (especially liquid-filling valve) is one of core parts that ensure efficient compacting and high yield.Quick when descending when moved cross beam, the oil in the low pressure topping up case flows into master cylinder fast through this device; When the moved cross beam quick return, the high pressure oil release in main oil cylinder piston chamber enters low pressure topping up case fast by this device.Actions such as the F.F. of master cylinder, pressurize, release and backhaul all must have charging device to participate in finishing, therefore the structure of charging device and flow channel shape have significance to the quick control of the idle running that improves press and backhaul high stability, and directly have influence on the key technical indexes of hydraulic press.
The design of current charging device mainly launches round strengthening reliability and efficient stable feed flow two aspects.Aspect the reliability enhancing, main split-type design by charging device improves interchangeability to simplify dismounting and maintenance (as referenced patent 200710009554.8), and perhaps preferred charging device mounting point is to avoid high stress concentrations zone (as referenced patent 201220448669.3).Aspect the efficient stable feed flow, mainly be complementary by profile in the external frame on the charging device and the topping up case and form guide channel to promote topping up speed (as referenced patent WO02062545A1), perhaps realize the single-stage guide release of master cylinder high pressure oil in the topping up tank drainback process at the inner damping hole (as referenced patent 200520069161.2) that adds of charging device, the instantaneous high pressure when avoiding charging device to open impacts.Existing patent design helps to reduce the fast and stable that valve body destroyed and strengthened feed flow, but has following some shortcomings, mainly shows as:
1) lifting of topping up speed runs into bottleneck.Topping up speed directly influences the movement velocity of master cylinder and the net cycle time of press, is one of key factor that determines press (the especially little fireballing ceramic press of stroke) working efficiency.Current topping up spool mainly promotes flow velocity by the external frame design, and as adopting the diversion Design of mushroom-shaped cone valve structure and spool face, there is defective in this mode in big flow topping up.For big flow press, the size of topping up spool is often followed the rising of flow and is increased, and the large size spool but becomes the major obstacle that obstruct is flowed at fluid, and the further lifting of topping up speed has run into bottleneck.
2) stability of high-voltage oil cylinder quick return process is not enough.In the master cylinder backhaul, open the thump that instantaneous pressure oil brings for avoiding charging device, often utilize external a series of off-load element that master cylinder pressure is reduced to safety value and open the topping up spool again.This mode increases cost and system complex, under high pressure opens and will bring serious destruction if automatically controlled error causes charging device.At the inner guide's spool (as referenced patent 200520069161.2) that adds the band damping hole of charging device, avoided adding the adverse effect that the release stage brings, promote the rapidity of master cylinder backhaul, but had problems such as pressure unloading poor controllability, release stability deficiency.
Summary of the invention
The object of the invention provides a kind of press charging device of realizing under the big flow the compound control in multithread road of topping up fast and fast and stable backhaul by the three-dimensional multithread of large size road topping up, further purpose of the present invention is to make the high-voltage oil cylinder backhaul of fast and stable more by multistage oil return damping structure, thereby is particularly useful for the compacting operating mode of high-pressure high-flow.
The objective of the invention is to realize by following approach.
The press charging device of the compound control in a kind of multithread road, the charging device that between topping up case and master cylinder, arranges, it is formed main points and is: charging device comprises spool, valve body and composite oil cylinder, wherein valve body is installed in the valve pocket, be spaced apart outer topping up passage between valve body and the valve pocket outer wall, valve on the valve body closes this passage, spool is installed in valve inner, valve body in the spool lower end has the center flow channels of through hole shape, valve body in the spool periphery has poroid drainage channel, composite oil cylinder has a plurality of chambeies, and wherein two ends are respectively rod chamber and following rod chamber, and upper piston rod and the valve body of last rod chamber are connected, lower piston rod and the spool of following rod chamber are connected, through the driving of composite oil cylinder lower piston rod, spool lifts, and central passage and drainage channel circulation form the internal-filling liquid passage, driving through the composite oil cylinder lower piston rod, valve body moves down, valve open, and outer topping up passage is opened.
Like this, on the basis of the outer topping up passage of routine, increase the internal-filling liquid passage, two topping up passages are opened one after another, the corresponding sectional area that dwindles each topping up passage of while, make that the sectional area of single topping up passage is less, and the sectional area after the stack of two topping up passages is bigger, realizes topping up and fast and stable backhaul fast under the big flow.This has liquid conveying capacity more efficiently than traditional single channel topping up pattern.
Purpose of the present invention can also realize by following approach.
Composite oil cylinder has three chambeies, wherein going up rod chamber links to each other with the first pipeline A with following rod chamber simultaneously, middle rodless cavity links to each other with the second pipeline B, when master cylinder needs topping up, by external selector valve action, make high-voltage oil liquid enter rod chamber and following rod chamber via the first pipeline A, the liquid in the 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.
The spool lower surface has stair-stepping spool ladder surface, the drainage channel periphery of valve body has stair-stepping valve body ladder surface, has the slit between spool side direction ladder surface and the valve body rank side direction tread, pluralize the oil return damping of a plurality of side direction slit-shaped of this plural number level ladder, wherein the oil return damping of the top is the first oil return damping and sequence down successively, and the vertical ladder surface of spool is sat and is combined on the corresponding vertical ladder surface of valve body.
Like this, the coupling by spool ladder surface and valve body ladder surface forms multistage oil return damping, and wherein the two cooperates the slit thickness that forms to be
δ 1,
δ 2,
δ 3, formed slit height between two ladder surfaces, two vertical surface
d 1,
d 2,
d 3Entrance liquid stream forms outlet liquid stream through these dampings, and finally enters the topping up case.In fact this slit height is exactly the length in slit.The slit of the top is the first slit height
d 1,Down be respectively the second slit height successively
d 2, the 3rd slit height
d 3.Corresponding slit thickness also is followed successively by the first slit thickness
δ 1, the second slit thickness
δ 2, and the 3rd slit thickness
δ 3.
Multistage oil return damping between entrance liquid stream and the outlet liquid stream is appreciated that into by a plurality of liquid resistances such as the resistance of first liquid, the resistance of second liquid and the 3rd liquid resistances and is in series.When fluid is flowed through this zone because slit causes resistance big, namely plays the effect of liquid resistance.
In concrete enforcement, form the height in slit between two vertical surface
d 1,
d 2,
d 3Numerical value choose very crucial, the first slit height preferably
d 1＜the second slit height
d 2＜the three slit height
d 3
The resistance of these liquid is with moving on the spool and reduce gradually.When initial, be in three grades of liquid resistances or multistage liquid resistance stage, spool is greatly slowly opened because promoting resistance, and the pressure in the master cylinder constantly descends.Follow spool on move the slit height
d i Reduce gradually, on spool, move the distance greater than
d 1The time, the resistance of first liquid was lost efficacy, and entered the twin-stage liquid resistance stage; On spool, move the distance greater than
d 2, the resistance of second liquid was lost efficacy, and entered the single-stage liquid resistance stage, and spool promotes rapidly.The further lifting of final spool causes the resistance of the 3rd liquid to be lost efficacy, therefore the master cylinder internal pressure effectively discharges, enter the aneroid resistance stage, this impels the fluid promotion valve body that enters rod chamber to move downward, and the master cylinder inner fluid enters the topping up case by inside and outside passage rapidly.Thus, by multistage oil return damping, realized the master cylinder motion state control of multistage release of initial stage, later stage quick return.
To further being preferably as follows of ladder surface:
The ladder of spool ladder surface and valve body ladder surface is 1 ~ 10 grade.
The thickness in slit
δSize be 0.2 ~ 8mm.
Have valve core through hole between spool upper surface and the 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 the valve pocket between the roof is the spool epicoele.
Under the steady state that master cylinder does not move, master cylinder links to each other with the spool epicoele by valve core through hole, and the pressure of the two is
p 2Because the area of spool epicoele is greater than the area of center flow channels, total force is downward and spool 7 is closed.And control easily spool epicoele and center flow channels difference in areas, the power that moves upward of corresponding promotion spool is then less with it, only need overcome the interior pressure product of spool epicoele and center flow channels difference in areas and master cylinder and get final product.By the input pressure of the reasonable setting first pipeline A mouth, can guarantee 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.
Be provided with hydraulic control 2/2-way valve in the spool, position, the left side 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 to be in position, a left side under the effect of spring force be on-state to this valve, and this moment, spool epicoele and center flow channels were communicated with, the pressure that suppresses in the spool epicoele to move on the spool discharges rapidly, and spool is opened rapider; Need in the off-load backhaul at master cylinder, because there is high pressure in master cylinder, hydraulic control 2/2-way valve is in right position under the high voltage control effect be off state, and this moment, this runner was inoperative.
Under the inoperative situation of above-mentioned this runner of hydraulic control 2/2-way valve, only realize the stable pressure-controlled of unloading by valve core through hole and damping hole when guaranteeing release.This preferred version can guarantee simultaneously that topping up operating mode spool opens fast, and release backhaul operating mode is stablized release.
The spool epicoele is connected with a kind of relief valve.
Like this, need not the safety valve of external big flow, this relief valve can play the safety protection effect when system pressure is excessive, thereby strengthens reliability and the Security of technical solution of the present invention.
Composite oil cylinder is fixed on the frame of topping up case inside or press outside.
Be provided with the isolation zone of through hole column in the middle rodless cavity of composite oil cylinder.
In sum, the present invention has following advantage compared to existing technology:
1) by the three-dimensional flow passage structure of large size, breaks through the bottleneck that topping up speed promotes.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 the large scale spool.
2) possesses multistage oil return damping structure, the quick and good stability of high-voltage oil cylinder backhaul.By the multistage damping of optimization is set in the oil return structure, high pressure in the master cylinder in the backhaul is stablized fast discharged.This scheme makes system works rapider because need not external off-load, has avoided the off-load impact, and system is succinct, stability is strong, safe.
Description of drawings
Fig. 1 is the rough schematic view that press charging device and the press of the compound control in a kind of multithread road of the present invention assembles mutually.
Fig. 2 is the schematic representation of the press charging device internal structure of the most preferred embodiment of the present invention compound control in described a kind of multithread road.
Fig. 3 characterizes the press charging device of the compound control in a kind of multithread road of the present invention at the schematic representation of topping up state.
Fig. 4 is the position relation of spool and valve body when characterizing the press charging device master cylinder release of the compound control in a kind of multithread road of the present invention.
Fig. 5 is that A among Fig. 4 is to view.
Liquid resistance distribution schematic diagram when Fig. 6 is the release of sign master cylinder between valve body ladder surface and the spool ladder surface.
Fig. 7 is the schematic representation of change procedure step by step of liquid resistance when characterizing the master cylinder release.
Fig. 8 is the hydrovalve connection diagram of the press charging device of the most preferred embodiment of the present invention compound control in described a kind of multithread road.
Among the figure: 1, hydraulic press, 2, the topping up case, 3, charging device, 4, master cylinder, 5, master cylinder piston, 6, composite oil cylinder, 6A, last rod chamber, 6B, middle rodless cavity, 6C, following rod chamber, 6D, upper piston rod, 6E, lower piston rod, 6F, the isolation zone, 7, spool, 7A, through hole, 7B, damping hole, 7C, the spool ladder surface, 8, valve body, 8A, drainage channel, 8B, center flow channels, 8C, the valve body ladder surface, 9, the spool epicoele, 10, main oil gallery, 11, the internal-filling liquid passage, 12, outer topping up passage, 13, entrance liquid stream, 14, outlet liquid stream, 15, the resistance of first liquid, 16, the resistance of second liquid, 17, the resistance of the 3rd liquid, 18, three grades of liquid resistances, 19, the resistance of twin-stage liquid, 20, the resistance of single-stage liquid, 21, the aneroid resistance, 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.
With reference to Fig. 1, Fig. 1 has schematically shown the assembling of charging device in hydraulic press of embodiment of the present invention.The charging device 3 that arranges between topping up case 2 and master cylinder 4 can use in hydraulic press 1 equipment such as grade, and play a significant role in master cylinder topping up and two main operating modes of backhaul.In the topping up process, charging device 3 moves downward, and follows master cylinder 4 to fall, and the liquid in the topping up case 2 enters master cylinder 4 via the charging device of opening 3 fast.Need carry out master cylinder 4 backhauls after finishing suppression process, this process need sheds the high pressure in the master cylinder 4 earlier, opens charging device 3 subsequently and rapidly its inner fluid is back in the topping up case 2 by master cylinder 4 is up.
With reference to Fig. 2, Fig. 2 has schematically shown the schematic representation of charging device 3 internal structures of embodiment of the present invention.
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 interact, there is the slit between the corresponding stepped surfaces, the thickness in slit
δSize be 0.2 ~ 8mm.
Have valve core through hole 7A between spool 7 upper surfaces and the 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 link to each other with spool epicoele 9, the pressure of the two is
p 2Because the area of spool epicoele 9 is greater than the area of center flow channels 8B, total force is downward and spool 7 is closed.
With reference to Fig. 3, Fig. 3 characterizes the schematic representation of three-dimensional topping up process.Composite oil cylinder 6 has three chambeies, wherein goes up rod chamber 6A and links to each other with the first pipeline A simultaneously with following rod chamber 6C, and middle rodless cavity 6B links to each other with the second pipeline B.When master cylinder 4 needs topping up, by external selector valve action, make high-voltage oil liquid enter rod chamber 6A and following rod chamber 6C via the first pipeline A, the liquid in the middle rodless cavity 6B is then outwards exported by the second pipeline B.The cylinder body of composite oil cylinder 6 is fixed in the topping up case 2 in the enforcement, therefore the fluid promotion upper piston rod 6D that enters rod chamber 6A by the first pipeline A moves downward, the valve body 8 that is fixed together with it also moves downward thereupon, and this impels the liquid in the topping up case 2 to flow to master cylinder 4 through outer topping up passage 12.Meanwhile, the fluid that enters rod chamber 6C under the fluid through the first pipeline A promotes lower piston rod 6E and the spool 7 that is connected moves upward.What spool 7 moved upward and valve body 8 moves downward carries out synchronously, make and form internal-filling liquid passage 11 between spool 7 and the valve body 8 rapidly, the internal-filling liquid runner 11 of valve core inside and center flow channels 8B have formed a brand-new topping up runner, and this has liquid conveying capacity more efficiently than traditional single channel topping up pattern.
With reference to Fig. 4, Fig. 5, the position of spool and valve body relation when Fig. 4 and Fig. 5 characterize the master cylinder release.After hydraulic press is finished predetermined work, carry out the upwards backhaul of master cylinder after the high pressure in the master cylinder 4 need being shed again.Similar with the topping up process, need the pipeline A oil-feed to composite oil cylinder 6 during master cylinder 4 releases, form to impel thus and move two-part thrust that moves down with valve body 8 on the spool 7.At this moment, be in high pressure conditions in the master cylinder 4, spool 8 is subjected to the effect of master cylinder 4 inner high voltages oil that it is closed, and this power is bigger; The power that moves upward of corresponding promotion spool 7 is then less with it, only need overcome spool epicoele 9 and center flow channels 8B difference in areas and master cylinder 2 interior pressure products and get final product.By the input pressure of the reasonable setting first pipeline A mouth, can guarantee that spool 8 is static and spool 7 moves upward.
For realizing stable off-load fast, at the lower surface of spool 7 stair-stepping spool ladder surface 7C is set, and at valve body 8 corresponding positions with matching valve body ladder surface 8C is set.Coupling by spool ladder surface 7C and valve body ladder surface 8C forms multistage oil return damping, and wherein the two cooperates the slit thickness that forms to be
δ 1,
δ 2,
δ 3, the formed slit of two ladder surfaces height
d 1,
d 2,
d 3Entrance liquid stream 13 forms outlet liquid stream 14 through these dampings, and finally enters topping up case 2.
With reference to Fig. 6, Fig. 7, liquid resistance of the present invention and change procedure thereof when Fig. 6 ~ 7 characterize the master cylinder release.Entrance liquid stream 13 and outlet liquid flow the multistage oil return damping between 14, are appreciated that into by a plurality of liquid resistances such as first liquid resistance, 15, second liquid resistance the 16 and the 3rd liquid resistances 17 to be in series.Hindering 17 with the 3rd liquid is example, forms small gap between the vertical surface of spool 7 and valve body 8, and resistance was big when fluid was flowed through this zone, namely plays the effect of liquid resistance.
In concrete enforcement, form the height in slit between two vertical surface
d 1,
d 2,
d 3Numerical value choose very crucial, preferably
d 1＜
d 2＜
d 3, the multistage liquid resistance of formation as shown in Figure 6, these liquid resistances are with moving on the spool 7 and reduce gradually.When initial, be in three grades of liquid and hindered for 18 stages, spool 7 is greatly slowly opened because promoting resistance, and the pressure in the master cylinder 4 constantly descends.Follow spool 7 on move the slit height
d i Reduce gradually,
i=1,2,3 ...On spool 7, move the distance greater than
d 1The time, first liquid resistance 15 was lost efficacy, and entered bipolar liquid and hindered for 19 stages; On spool 7, move the distance greater than
d 2, second liquid resistance 16 was lost efficacy, and entered one pole liquid and hindered for 20 stages, and 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 pressures effectively discharge, enter aneroid and hindered for 21 stages, this impels the fluid promotion valve body 8 that enters rod chamber 6A to move downward, and master cylinder 4 inner fluids enter topping up case 2 by inside and outside passage rapidly.Thus, by multistage oil return damping, realized the master cylinder motion state control of multistage release of initial stage, later stage quick return.
With reference to Fig. 8, be provided with hydraulic control 2/2-way valve 22 in the spool 7, a chamber of hydraulic control 2/2-way valve 22 meets drainage channel 8A, and another chamber meets center flow channels 8B.Spool 7 tops are connected relief valve 23 with the valve body 8 inner spool epicoeles 9 that constitute.
In order further to strengthen the rapidity that fluid flows, can in spool 7, increase a hydraulic control 2/2-way valve 22, position, the left side 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 chambers are low pressure, then to be in position, a left side under the effect of spring force be on-state to this valve, and this moment, spool epicoele 9 and center flow channels 8B were communicated with, the pressure that suppresses in the spool epicoele 9 to move on the spool 7 discharges rapidly, and spool is opened rapider.Need in the off-load backhaul at master cylinder 4, because there is high pressure in master cylinder, 2/2-way valve 22 is in right position under the high voltage control effect be off state, and this moment, this runner was inoperative, only realized the stable pressure-controlled of unloading by damping hole 7B when guaranteeing release.This preferred embodiment can guarantee simultaneously that topping up operating mode spool 7 opens fast, and release backhaul operating mode is stablized release.Except connecing hydraulic control 2/2-way valve 22; for strengthening reliability and the Security of work, can connect a relief valve 23 at spool epicoele 9, when system pressure is excessive, play the safety protection effect; need not the safety valve of external big flow, can further strengthen adaptability of the present invention.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (14)
1. the press charging device of the compound control in multithread road, the charging device that between topping up case and master cylinder, arranges, it is characterized in that, charging device comprises spool, valve body and composite oil cylinder, wherein valve body is installed in the valve pocket, be spaced apart outer topping up passage between valve body and the valve pocket outer wall, valve on the valve body closes this passage, spool is installed in valve inner, valve body in the spool lower end has the center flow channels of through hole shape, and the valve body in the spool periphery has poroid drainage channel, and composite oil cylinder has a plurality of chambeies, wherein two ends are respectively rod chamber and following rod chamber, upper piston rod and the valve body of last rod chamber are connected, and lower piston rod and the spool of following rod chamber are connected, through the driving of composite oil cylinder lower piston rod, spool lifts, central passage and drainage channel circulation form the internal-filling liquid passage, and through the driving of composite oil cylinder lower piston rod, valve body moves down, valve open, outer topping up passage is opened.
2. the press charging device of the compound control in a kind of multithread road according to claim 1, it is characterized in that, composite oil cylinder has three chambeies, wherein going up rod chamber links to each other with the first pipeline A with following rod chamber simultaneously, middle rodless cavity links to each other with the second pipeline B, when master cylinder needs topping up, by external selector valve action, make high-voltage oil liquid enter rod chamber and following rod chamber via the first pipeline A, the liquid in the middle rodless cavity is then outwards exported by the second pipeline B.
3. the press charging device of the compound control in a kind of multithread road 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 the compound control in a kind of multithread road according to claim 1, it is characterized in that, the spool lower surface has stair-stepping spool ladder surface, the drainage channel periphery of valve body has stair-stepping valve body ladder surface, has the slit between spool side direction ladder surface and the valve body rank side direction tread, pluralize the oil return damping of a plurality of side direction slit-shaped of this plural number level ladder, wherein the oil return damping of the top is the first oil return damping and sequence down 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 the compound control in a kind of multithread road 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 slit of the top is the first slit height
d 1, down be respectively the second slit height successively
d 2, the 3rd slit height
d 3, corresponding slit thickness also is followed successively by the first slit thickness
δ 1, the second slit thickness
δ 2, and the 3rd slit thickness
δ 3, the first slit height wherein
d 1The value maximum, reduce the value minimum of the slit height of afterbody thereafter gradually.
6. the press charging device of the compound control in a kind of multithread road according to claim 5 is characterized in that, the ladder of spool ladder surface and valve body ladder surface is 3 grades, the first slit height
d 1＜the second slit height
d 2＜the three slit height
d 3
7. the press charging device of the compound control in a kind of multithread road according to claim 5 is characterized in that, the thickness in slit
δSize be 0.2 ~ 8mm.
8. the press charging device of the compound control in a kind of multithread road according to claim 1, it is characterized in that, have valve core through hole between spool upper surface and the 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 the compound control in a kind of multithread road according to claim 8 is characterized in that, the aperture of valve core through hole is 1 ~ 20mm.
10. according to Claim 8 or the press charging device of the 9 described compound controls in a kind of multithread road, it is characterized in that, damping hole can be set in valve core through hole.
11. the press charging device of the compound control in a kind of multithread road according to claim 1, it is characterized in that, be provided with hydraulic control 2/2-way valve in the spool, position, the left side 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 to be in left side position under the effect of spring force be on-state to this valve, this moment, spool epicoele and center flow channels were communicated with, the pressure that suppresses in the spool epicoele to move on the spool discharges rapidly, and spool is opened rapider; Need in the off-load backhaul at master cylinder, because there is high pressure in master cylinder, hydraulic control 2/2-way valve is in right position under the high voltage control effect be off state, and this moment, this runner was inoperative.
12. the press charging device of the compound control in a kind of multithread road according to claim 1 is characterized in that the spool epicoele is connected with a kind of relief valve.
13. the press charging device of the compound control in a kind of multithread road according to claim 1 is characterized in that, composite oil cylinder is fixed on the frame of topping up case inside or press outside.
14. the press charging device of the compound control in a kind of multithread road according to claim 2 is characterized in that, is provided with the isolation zone of through hole column in the middle rodless cavity of composite oil cylinder.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108407049A (en) * | 2018-06-01 | 2018-08-17 | 福建海源自动化机械股份有限公司 | A kind of upper beam structure of wound form hydraulic press |
| CN112060670A (en) * | 2020-08-13 | 2020-12-11 | 邵玉刚 | Flow and pressure control device of hydraulic machine |
| CN112824721A (en) * | 2019-11-21 | 2021-05-21 | Ckd株式会社 | Fluid control valve |
| CN113237523A (en) * | 2021-05-11 | 2021-08-10 | 韩军蕊 | Water meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108407049A (en) * | 2018-06-01 | 2018-08-17 | 福建海源自动化机械股份有限公司 | A kind of upper beam structure of wound form hydraulic press |
| 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 |
| CN112824721A (en) * | 2019-11-21 | 2021-05-21 | Ckd株式会社 | Fluid control valve |
| CN112060670A (en) * | 2020-08-13 | 2020-12-11 | 邵玉刚 | Flow and pressure control device of hydraulic machine |
| CN113237523A (en) * | 2021-05-11 | 2021-08-10 | 韩军蕊 | Water meter |
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|---|---|
| CN103334975B (en) | 2015-10-28 |
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