CN1206452A - Hydraulic unit - Google Patents
Hydraulic unit Download PDFInfo
- Publication number
- CN1206452A CN1206452A CN 96199344 CN96199344A CN1206452A CN 1206452 A CN1206452 A CN 1206452A CN 96199344 CN96199344 CN 96199344 CN 96199344 A CN96199344 A CN 96199344A CN 1206452 A CN1206452 A CN 1206452A
- Authority
- CN
- China
- Prior art keywords
- piston
- hydraulic unit
- cylinder
- clutch release
- release slave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention relates to a hydraulic unit for feeding an object at a desired feed speed a distance in a given feed direction during a working stroke and, in a return stroke, bringing the object back to the initial position at a considerably greater return speed, comprising a double-acting working cylinder (1) with a first piston (16), the piston rod (17) of which is connected to the object which is to be moved, and a receiver cylinder (2) which is provided with a second piston (28) and designed to be filled with oil from the working cylinder during the return stroke, the first piston (16) and the second piston (28) being interconnected by a rigid connecting member (31) which forces the second piston to follow the movements of the first piston.
Description
The present invention relates to a kind of hydraulic unit, be used for during working stroke along given direction of feed with the feed speed wanted object feeding one segment distance, and in return stroke, with obvious higher return speed this object is taken back initial position, this hydraulic unit comprises a double-action clutch release slave cylinder that has first piston, its piston rod is connected in treats movable object, and a container cylinder, this container cylinder is provided with second piston and is designed to and is full of by the oil from clutch release slave cylinder during return stroke.In particular, the present invention relates to be intended to move form and be used for the so-called diffuser of the plain paper pulp of washing the fibre, the hydraulic unit of the filter screen unit of the part of the pressurization diffuser of more specifically saying so, but the present invention also can perform well in the normal pressure diffuser.
At what is called pressurization diffuser (it in cellulose industry, be used in the scrubber tower in continuous operation in the washing pulp) filter screen unit by means of a hydraulic work cylinder to-and-fro motion through pull bar.Running length is big usually to about 1m.During downward working stroke, filter screen unit is by with only just over the feeding downwards lentamente of the speed of the avale speed of cellulose pulp in tower.On the other hand, speed is very high during return stroke, usually about 1～1.5m/s.The filter screen unit that will promote during this rapid return motion may weight surpasses 10 tons and designed even bigger device.In addition, also produce frictional force between the cellulose pulp in filter screen unit and tower.Thereby in order to realize considerable merit in the very short time, the clutch release slave cylinder in the hydraulic unit and other parts must have very big size.This for example relates to and surpasses 10, the hydraulic fluid flow rate of 000l/min, and oil mass must filter during the work cycle of hydraulic unit and cool off in addition.Existing systems can not address these problems satisfactorily, and this hinders in this technical field towards increasing pressurization diffuser with this more and more development of heavy filter screen unit.
In order to satisfy above requirement, seen it at first being so-called float accumulator over nearly 15 years, be the exploitation that comprises the hydraulic unit of so-called piston container afterwards.An advantage of float accumulator is, the dynamic seal that it need not changed as the result of wearing and tearing.Yet in bigger oil mass and the occasion of long cycle time, it is so big that gas loss becomes, so that must inflate again continually.Thereby the exploitation of piston container constitutes an improvement in this field.An example of the unit of this type illustrates in SE 464 533.Replace inflation, this element has an oil hydraulic cylinder, and this oil hydraulic cylinder is the oil pressure oil sump tank.Yet this principle has a shortcoming, and promptly before next rapid return stroke began, the piston container must be fully, perhaps emptying fully at least basically.Thereby emptying time must be shorter than the shortest cycle time of diffuser.This means hydraulic oil mobile be that to have a height of flow of variation discontinuous.Except this related to the difficulty of compensator or trimmer pressure spike aspect, changes in flow rate and discontinuous working method also meaned and can't filter best and cool off.
The objective of the invention is to overcome the above problems and a kind of improved hydraulic unit is provided.Exactly, the objective of the invention is to solve in the cellulose industry problem in the pressurization diffuser, but this does not discharge the present invention and is applied to wherein may occur possibility in the other technologies field of similar problem.
These purposes and other purposes can be that this fact of feature realizes with the content of following patent claims by means of the present invention.Other features of the present invention and aspect reveal from following description to preferred embodiment.
In following description to preferred embodiment, figure with reference to the accompanying drawings, this figure schematically illustrate the hydraulic unit (hydraulic system) according to preferred embodiment.The figure of accompanying drawing is that this fact of schematic representation means, especially, it is not pro rata, and means that different pipelines may be, and reality is connected in the cylinder that forms this unit part to be different from the mode shown in the figure in some cases, and this also points out in the following description.Equipment
According to the present embodiment, hydraulic unit comprises a clutch release slave cylinder 1, a container cylinder 2, connecting tube 3 between clutch release slave cylinder 1 and container cylinder 2 and be arranged in one of them main valve 4, a high pressure accumulator 5, a pump 6 in the pipeline 7 between hydraulic oil container 8 and high pressure accumulator 5, and a cooling unit 9 and a filter 10 of being used for hydraulic oil 8 return tube 11 from container cylinder 2 to fuel tank.In return tube 11, also have an one-way valve 12, its only allows from container cylinder 2 to fuel tank 8 flow.Drain mast 13 extends to fuel tank 8 from the top of container cylinder 2.In this pipeline 13, an one-way valve 14 is arranged also.
Clutch release slave cylinder 1 is made up of the differential cylinder of the piston rod 17 that stretch out a band working piston 16 and the lower end of passing clutch release slave cylinder 1.According to preferable use, piston rod 17 is connected in the pull bar of a big filter screen unit, and this filter screen unit forms and is used for the part of in the continuous operation tower pressurization diffuser of the plain paper pulp of washing the fibre.For this reason, piston 16 and piston rod 17 can be realized downward slowly working stroke, transfer described filter screen unit, and, when arriving lower end position, realize that apace return stroke is to last initial position.Reach 1m and the total length of clutch release slave cylinder 1 therefore can be just over 1m according to the present embodiment running length.
Piston 16 in the clutch release slave cylinder 1 is divided into cavity of resorption 19 and epicoele 20 to clutch release slave cylinder.These chambeies can be by interconnecting at two end walls that are close to clutch release slave cylinder 1 or the pipeline 21 that just extends between the hydraulic fluid port therein.In pipeline 21, there is one to end and modulating valve 22.
Connecting tube 3 between clutch release slave cylinder 1 and the container cylinder 2 in an intermediate cavity 24 and container cylinder 2 one be close to or just extend between the hydraulic fluid port in the lower end wall at it.Between the epicoele 20 and intermediate cavity 24 of clutch release slave cylinder 1, a narrowing portion 25 is arranged, it is designed to be received in a taper 26 on the top side of piston 16 so that the soft braking of working piston 16 is provided during it makes progress return stroke.
Container cylinder 2 has the internal diameter littler than clutch release slave cylinder 1.The displacement piston of a piston in the container cylinder-hereinafter referred to as-marked into 28.This in a kind of original known mode, has a cylindrical recess 29 in the top side, long slightly male member 30 couplings at its diameter and this cylinder top.Drain mast 13 extends to and is opened on the lower surface of described male member 30.
According to the present invention, bar 31 shapes be rigidly connected member in clutch release slave cylinder 1 working piston 16 and the displacement piston 28 in the container cylinder 2 between extend.Its diameter is fixedly connected to two pistons 16 and 28 less than the bar 31 of the piston rod 17 of working piston, this means that the motion of working piston 16 must be delivered to displacement piston 28 in the container cylinder 2 through bar 31.Between intermediate cavity 24 (it constitutes an integral part of clutch release slave cylinder 1 according to function) and container cylinder 2, link 32 Hes are arranged, in this, a Sealing 33, the latter pressured hermetically bar 31, bar 31 can pass described Sealing 33 slips.
According to an optimum implementation, clutch release slave cylinder 1 is long-pending with the water cross section of container cylinder 2 in the zone of chamber 20 and 35, has promptly deducted the area of connecting rod 31, between ratio be about 5/4.
In the high-pressure section of this unit, a connecting tube 39 extends between the cavity of resorption 19 of high pressure accumulator 5 and clutch release slave cylinder 1, is opened on a hydraulic fluid port in the lower end wall of clutch release slave cylinder 1.Connecting tube 3 and 39 is intended under high pressure to carry very big oily flow and thereby very big size is arranged.According to this embodiment, they have the internal diameter at 100～150mm of desired use, preferably 130mm.Return tube 11, connecting tube 21 and pump line 7 should be able to come transferring oil with smaller flow and thereby can do it thinly.According to this embodiment at desired use, they have the internal diameter of 50～80mm.Drain mast 13 should be able to just be taken back waste oil fuel tank 8 and thereby can do very carefully from waste oil chamber 16.
Pump 6 comprises the pressure that is used for detecting in the high-pressure section and is used for regulating the device of this pump, like this it just can continuous operation so that in the high-pressure section that comprises high pressure accumulator 5, keep constant pressure.Thereby pump 6 continuous operation in principle, still its changes in flow rate during work cycle.The method of work of hydraulic unit
To explain the method for work of above-mentioned hydraulic unit (hydraulic system) now.Suppose that when work cycle begins working piston 16 and displacement piston 28 are in their upper end position, and supposition taper 26 is introduced into narrowing portion 25.The downward working stroke of working piston 16 and piston rod 17 is closed (this position of main valve is shown among the figure) and valve 22 by main valve 4 and is opened to given adjustment position (this position causes throttling given in the connecting tube 21) and starts.So the pressure in the epicoele 20 becomes the pressure in the as many as active chamber 19.But owing to be greater than in cavity of resorption 19, so working piston is urged downwardly in epicoele 20 in the effective work area on the working piston 16.Its feed speed depends on the adjustment of valve 22.Container chamber 35 in container cylinder 2 is by oil-filled, and oil is forced out through one-way valve 12 by return tube 11 by means of leaning on working piston 16 through the displacement piston 28 that connecting rod 31 pulls down.In this position, container cylinder 2 plays a positive displacement pump.Oil was cooled in cooling unit 9 and is filtered in filter 10 before it is introduced to fuel tank 8.Pressure in the high-pressure section is adjusted to the pressure of wanting by means of pump 6.So, working piston 16 and displacement piston 28 downwards working stroke proceed to two pistons always and arrived till their lower end position.
When working piston 16 and displacement piston 28 had arrived their lower end position, modulating valve 22 was closed and main valve 4 is opened.So the pressure in the epicoele 20 in the clutch release slave cylinder 1 reduces, cause working piston 16 upwards to be driven apace and with very big power in cavity of resorption 19 and under the effect of the high pressure in the Pressure energy accumulator 5.The reduction of pump unit 6 detected pressures and increase pump 67 upwards infeed high-pressure section by the road from fuel tank 8, that is to say the oily flow that upwards infeeds high-pressure section.Epicoele 20 from clutch release slave cylinder 1, oil flows up into container chamber 35 through narrowing portion 25, intermediate cavity 24 and connecting tube 3 with very big flow.Displacement piston 28 is connected bar 31 and upwards promotes with the speed identical with working piston 16.Yet, because container cylinder 2 has the diameter littler than clutch release slave cylinder 1, the volume of container chamber 35 not with clutch release slave cylinder 1 in chamber 20 in the same rate mutually that reduces of volume strengthen.Thereby, upwards compressed into container chamber 35 than its receptive more oil through connecting tube 3.Redundance is forced out through one-way valve 12 and cooling unit 9 and filter 10 by return tube 11.This means, both as above-mentioned downward working stroke during, during return stroke, oil is all drawn from container chamber 35 again.This means again, thereby is the comparison homogeneous by return tube 11 and the flow by cooling unit 9 and filter 10, does not have very big pressure spike.This makes cooling unit 9 and filter 10 might be determined size best and work best.
The waste oil of walking around displacement piston 28 was collected in 29 li of recesses afterwards and was extruded to fuel tank 8 through drain mast 13 when displacement piston 28 arrives its upper end positions.Meanwhile, the tapering part 26 on the working piston 16 is introduced into narrowing portion 25, and this causes braking to working piston 16 in original known mode.
So when working piston 16 arrives its upper end positions, that is to say when turning back to its initial position, main valve 4 is closed once more and modulating valve 22 is opened, and work cycle finishes and a new circulation can begin whereby.So, this hydraulic unit is worked circularly, the downward feed speed of working piston 16 is according to the wish that depends on the condition in the diffuser (not shown), adjustment by valve 22 is regulated, this diffuser is connected in piston rod, and according to described purposes, this diffuser is intended to operate by means of this hydraulic unit.
Be noted that and the invention is not restricted to described embodiment.For example, draining chamber 36 can be communicated in atmosphere on every side or be opened wide fully.Should also be noted that application of the present invention is not limited to heavy hydraulic system and very big hydraulic medium flow.For example, the present invention also can perform well in included small-sized component and be used for such flow, and promptly speed in any direction or hydraulic flow are so high, so that should use the accumulator of certain form in leading to the return tube of fuel tank.
Claims (10)
1. hydraulic unit, be used for during working stroke along given direction of feed with the feed speed wanted object feeding one segment distance, and in return stroke, with obvious higher return speed this object is taken back initial position, this hydraulic unit comprises a double-action clutch release slave cylinder (1) that has first piston (16), its piston rod (17) is connected in treats movable object, an and container cylinder (2), this container cylinder is provided with second piston (28) and is designed to and is full of by the oil from clutch release slave cylinder during return stroke, it is characterized in that, first piston (16) interconnects by the member that is rigidly connected (31) with second piston (28), and this connector element forces second piston to follow the motion of first piston.
2. according to the hydraulic unit described in the claim 1, it is characterized in that connecting tube (3) between the opposed facing chamber (20,35) of clutch release slave cylinder (1) and container cylinder (2) and the stop valve (4) in described connecting tube (3).
3. according to the hydraulic unit described in claim 1 or 2, it is characterized in that the container cylinder has the cross section littler than clutch release slave cylinder.
4. according to the hydraulic unit described in the claim 1～3 any one, it is characterized in that a return tube (11) that is used for hydraulic oil extends from the container cylinder.
5. according to the hydraulic unit described in the claim 4, it is characterized in that at least one belongs to device type of device, that be used for handling hydraulic oil (9,10) that comprises cooling unit and filtrating equipment and is configured in the described return tube (11).
6. according to the hydraulic unit described in the claim 1～5 any one, it is characterized in that a high pressure accumulator (5) is connected in that chamber (19) back to container cylinder (2) in the clutch release slave cylinder (1).
7. according to the hydraulic unit described in the claim 1～6 any one, it is characterized in that, a pump-unit (6) is designed to work all the time in the work cycle of hydraulic unit, so that keep the pressure of expection in the high-pressure section that comprises high pressure accumulator (5) of this unit.
8. according to the hydraulic unit described among the claim 1-7 any one, it is characterized in that a configuration connecting tube (21) between two chambeies (19,20) of clutch release slave cylinder (1), and be that one of configuration ends and modulating valve (22) in this connecting tube (21).
9. according to the hydraulic unit described in the claim 1～8 any one, it is characterized in that, clutch release slave cylinder (1) and the opposed facing chamber (20 of container cylinder (2) at described all cylinders, ratio between the water cross section in zone 35) is long-pending is at least 1.1, maximum 2.0, preferably at least 1.15 and maximum 1.5, preferably about 1.25.
10. according to the hydraulic unit described in the claim 1～8 any one, it is characterized in that the piston rod of clutch release slave cylinder (17) is connected in a filter screen unit in the diffuser that is used for the plain paper pulp of washing the fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96199344 CN1206452A (en) | 1995-12-29 | 1996-12-16 | Hydraulic unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE95046959 | 1995-12-29 | ||
| CN 96199344 CN1206452A (en) | 1995-12-29 | 1996-12-16 | Hydraulic unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1206452A true CN1206452A (en) | 1999-01-27 |
Family
ID=5129438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96199344 Pending CN1206452A (en) | 1995-12-29 | 1996-12-16 | Hydraulic unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472005A (en) * | 2009-08-25 | 2012-05-23 | 美佐纸业股份有限公司 | Arrangement and method for washing cellulose pulp |
| CN102734240A (en) * | 2012-06-26 | 2012-10-17 | 张家港市华舜机械制造有限公司 | Oil circuit system of main oil cylinder of tube bending machine |
-
1996
- 1996-12-16 CN CN 96199344 patent/CN1206452A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472005A (en) * | 2009-08-25 | 2012-05-23 | 美佐纸业股份有限公司 | Arrangement and method for washing cellulose pulp |
| CN102734240A (en) * | 2012-06-26 | 2012-10-17 | 张家港市华舜机械制造有限公司 | Oil circuit system of main oil cylinder of tube bending machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4490096A (en) | Pump system for liquid/solid materials with balanced output | |
| CN101253335B (en) | Oil circuit for controlling a double-action hydraulic drive cylinder | |
| JPH0627521B2 (en) | Control device for double-acting hydraulic cylinder unit | |
| WO1993018306A3 (en) | Hydraulic oil well pump drive system | |
| CA2559602A1 (en) | Innerscoping hydraulic system | |
| CN201043539Y (en) | Hexahedral pressing machine hydraulic control apparatus for differential oil supply in heating and pressure maintaining direction | |
| CN106460810A (en) | Hydraulically driven bellows pump | |
| CA2024432C (en) | Means for receiving and subsequently emptying hydraulic fluid from a hydraulic system | |
| CN101275592A (en) | Hydropneumatic pressure transmission device | |
| EP0868612B1 (en) | Hydraulic unit | |
| GB1565879A (en) | High pressure piston pumps | |
| CN1206452A (en) | Hydraulic unit | |
| CN109626509B (en) | Membrane method seawater desalination energy recovery device and energy lift pump integrated system | |
| CN101205954B (en) | Device and method for actuating a clutch | |
| CN1959129A (en) | Apparatus for pressurizing gas, liquid | |
| CN105927495A (en) | Constant-flowing filling pump for glue used for producing anchoring agent | |
| RU2056550C1 (en) | Hydraulic drive | |
| EP0333264B1 (en) | Power converter for driving a hydraulic submerged tool | |
| CN107725502A (en) | A kind of garbage compression station hydraulic unloading buffer unit | |
| US4455828A (en) | Hydraulic power unit | |
| CN100484597C (en) | Heating and pressure-maintaining direction unisotonic oil-supplying hydraulic controlling system for hexahedral top pressing machine | |
| CN215927957U (en) | Automatic change hydraulic system for waste paper baling press fast or slow | |
| SU1587211A1 (en) | Hydraulic system of power support unit | |
| CN113775580A (en) | Automatic change hydraulic system for waste paper baling press fast or slow | |
| SU1464968A1 (en) | Timber loading control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |