CN202125481U - Circuit used to quickly replace contaminated oil in master cylinder of servo system - Google Patents
Circuit used to quickly replace contaminated oil in master cylinder of servo system Download PDFInfo
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- CN202125481U CN202125481U CN2011200116599U CN201120011659U CN202125481U CN 202125481 U CN202125481 U CN 202125481U CN 2011200116599 U CN2011200116599 U CN 2011200116599U CN 201120011659 U CN201120011659 U CN 201120011659U CN 202125481 U CN202125481 U CN 202125481U
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- oil cylinder
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Abstract
The utility model is a circuit used to quickly replace contaminated oil in master cylinder of servo system. The utility model adopts the principle of series connection of two cylinders in the prior hydraulic control circuit. Due to the features that a retrieving cylinder is a two-way cylinder which is controlled by a large flow direction valve, and the rod chamber of the retrieving cylinder is connected with the oil chamber of a single-way piston servo adjusting cylinder in series, when contaminated oil needs to be replaced, a new large diameter circuit providing the single-way piston servo adjusting cylinder with clean oil can be formed by communicating the oil entrance of the rod chamber of the retrieving cylinder with the oil entrance of the rodless chamber through a bypass circuit. The contaminated oil in the single-way piston servo adjusting cylinder returns back to the cylinder through control valves and filters under the action of a balancing cylinder. The piston of the single-way piston servo adjusting cylinder can cause multiple fro movements to accomplish multiple feeding and returning cycles by controlling control valves, which can replace oil in the single-way piston servo adjusting cylinder in a short time to meet the cleanliness requirement.
Description
Technical field
The utility model relates to a kind of hydraulic servo adjust system of cross-roll straightening machine, particularly relates to replacing the loop that the servo-system master cylinder pollutes fluid in a kind of cross-roll straightening machine fast.
Background technique
Cross-roll straightening machine is a kind of finishing equipment of metallurgical machinery, and its roll gap has the function that definite value is made a concession stroke.Wherein the adjustment of the roll gap between roll surface is that servo apply hydraulic pressure oil cylinder and a yielding oil cylinder are realized as assembly up and down.
In system with the yielding of roll gap definite value; Because of servo adjustment oil cylinder is a tandem arrangement with the oil circuit of making a concession oil cylinder; The long-term frequent movement of making a concession oil cylinder can quicken cylinder seal wearing and tearing at the volley, and particle that is come off by wearing and tearing and the pollutant in the hydraulic system can accumulate in the servo adjustment cylinder body; Cause cylinder body inner fluid cleanliness to be reduced to undesirable gradually; And these contaminated fluid can be through servovalve in the process of carrying out servo adjustment, thus servovalve or Proportional valve action malfunctioning at random when causing work, and then influence the control accuracy and the performance of servo-system.And accumulate in the pollutant in the servovalve oil-feed oil circuit, thereby intractable when causing fault to take place because oil cylinder and the residing specific position of valve group make that during operation qualified fluid can't arrive the position of valve group all the time in the loop.
Hydraulic pipe line according to the routine layout; Only considered normal job requirement; If pollution fluid that will servo-cylinder is inner all displacement makes it reach the required precision of system; Need to adopt the complicated method time long,, can only come handling failure through changing Proportional valve sometimes in servovalve or the stuck back of Proportional valve even can't replace with cost.So not only improve the maintenance cost of equipment, also influenced the performance and the online assignment rate of main frame.
This shows that the hydraulic servo adjust system of above-mentioned existing cross-roll straightening machine obviously still has inconvenience and defective, and demands urgently further improving in structure and use.In order to solve the problem of above-mentioned existence, how to found the loop that a kind of quick displacement servo-system master cylinder of new structure pollutes fluid, real be the problem of one of present equipment development producer and main research and development problem of applying unit and needs solution.
Summary of the invention
The purpose of the utility model is; Overcome the defective of the hydraulic servo adjust system existence of existing cross-roll straightening machine; And the loop that the quick displacement servo-system master cylinder that a kind of new structure is provided pollutes fluid, technical problem to be solved is to make it can replace the inner pollution fluid of servo-cylinder simply, easily, and gets final product the operation reliably and with long-term of support equipment through daily plant maintenance; The reliability of raising equipment is very suitable for practicality.
The purpose of the utility model and to solve its technical problem be that technological scheme below adopting realizes.The loop that a kind of quick displacement servo-system master cylinder that proposes according to the utility model pollutes fluid; It comprises: one makes a concession oil cylinder; This yielding oil cylinder comprises rod chamber and rodless cavity, and wherein this rod chamber and this rodless cavity have a rod chamber filler opening and a rodless cavity filler opening respectively; One control valve group, this this rodless cavity filler opening of making a concession oil cylinder is connected with an oil feed line and a fuel tank through this control valve group; The servo adjustment oil cylinder of one single-action plunger piston, its oil pocket is in series through this rod chamber filler opening and this rod chamber, and is connected with this fuel tank behind filter through this control valve group; And two balancing cylinders, its piston rod links together through the plunger of an actuator and the servo adjustment oil cylinder of this single-action plunger piston, and the rod chamber of these two balancing cylinders also is connected with this oil feed line through this control valve group simultaneously; Wherein, between the rod chamber filler opening of this yielding oil cylinder and this rodless cavity filler opening, be provided with a bypass oil circuit, this bleed off circuit is provided with an Electric Actuated Stop Valves.
The purpose of the utility model and solve its technical problem and can also adopt following technical measures to come further to realize.
Aforesaid quick displacement servo-system master cylinder pollutes the loop of fluid, and wherein said rodless cavity filler opening is to be connected with this oil feed line and this fuel tank through one in this control valve group big direction of the traffic valve.
Aforesaid quick displacement servo-system master cylinder pollutes the loop of fluid, and wherein said balancing cylinder is an one-way cylinder.
Aforesaid quick displacement servo-system master cylinder pollutes the loop of fluid, and this rod chamber filler opening and this rodless cavity filler opening of wherein said yielding oil cylinder are a tee union.
The utility model compared with prior art has tangible advantage and beneficial effect.Know via above; In order to achieve the above object; The loop that the quick displacement servo-system master cylinder that the utility model provides pollutes fluid; It is the principle of utilizing two oil cylinder series connection in the existing hydraulic control circuit; By making a concession oil cylinder is a two-way cylinder and the characteristic that is in series by the oil pocket of the rod chamber of a big direction of the traffic valve control action and this oil cylinder and the servo adjustment oil cylinder of single-action plunger piston; During pollution fluid in the servo adjustment oil cylinder of needs displacements single-action plunger piston oil pocket, the rod chamber filler opening of making a concession oil cylinder is communicated with new big latus rectum oil circuit of formation with the rodless cavity filler opening by bleed off circuit, the fluid of cleaning is provided in the oil pocket of the servo adjustment oil cylinder of single-action plunger piston through this oil circuit.Pollution fluid in the servo adjustment oil cylinder of the single-action plunger piston oil pocket is then being got back in the fuel tank behind control valve group and filter by oil return circuit under the effect of balancing cylinder.Control control valve group makes the plunger of the servo adjustment oil cylinder of single-action plunger piston carry out repeatedly back and forth movement; Thereby accomplish the repeatedly oil-feed and the oil return action of the servo adjustment oil cylinder of single-action plunger piston oil pocket; Through after repeatedly oil-feed and the oil return actuation cycle, can be to meet the fluid that cleanliness requires with the contaminated oil fluid exchange that accumulates in the servo adjustment cylinder block of single-action plunger piston in the short period of time.
By technique scheme; The loop that a kind of quick displacement servo-system master cylinder of the utility model pollutes fluid has advantage and beneficial effect at least: the utility model is under the constant prerequisite of the structure that keeps existing hydraulic system and function; Only need a bleed off circuit periodic maintenance very easily be set on the loop of making a concession oil cylinder and handle Proportional valve or the servovalve fault that hydraulic oil pollution caused; Shorten the time of plant maintenance and the time of handling failure greatly, improved reliability and operating rate that equipment uses.
In sum, the utility model has obvious improvement technically, and has tangible good effect, really is the new design of a novelty, progress, practicality.
Above-mentioned explanation only is the general introduction of the utility model technological scheme; In order more to know the technological means of understanding the utility model; And can implement according to the content of specification, and for let the above-mentioned of the utility model with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is that the quick displacement servo-system master cylinder of the utility model pollutes the schematic representation in the loop of fluid.
Fig. 2 is the yielding oil cylinder of the utility model and the generalized section of bleed off circuit thereof.
Fig. 3 is the equivalent oil circuit schematic representation of bleed off circuit of the yielding oil cylinder of the utility model.
1: make a concession oil cylinder 2: the control valve group
3: oil circuit 4: the servo adjustment oil cylinder of single-acting
5: balancing cylinder 6: actuator
7: piston and piston rod 8: rod chamber hydraulic fluid port
9: Electric Actuated Stop Valves 10: the rodless cavity hydraulic fluid port
11: make a concession cylinder block 12: rod chamber
13: rodless cavity 14: bleed off circuit
P: oil-feed oil circuit T: oil return circuit
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked; Below in conjunction with accompanying drawing and preferred embodiment; A kind of quick displacement servo-system master cylinder that proposes according to the utility model is polluted its embodiment of loop, structure, characteristic and the effect thereof of fluid, specify as after.
Aforementioned and other technology contents, characteristics and the effect of relevant the utility model can clearly appear in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation through embodiment; When can being to reach technological means that predetermined purpose takes and effect to obtain one more deeply and concrete understanding to the utility model; Yet the appended graphic usefulness that only provides reference and explanation is not to be used for the utility model is limited.
See also Fig. 1 and shown in Figure 2, Fig. 1 is that the quick displacement servo-system master cylinder of the utility model pollutes the schematic representation in the loop of fluid.Fig. 2 is the yielding oil cylinder of the utility model and the generalized section of bleed off circuit thereof.The utility model is a kind of loop that can replace servo adjustment oil cylinder internal contamination fluid fast in the cross-roll straightening machine, and it mainly constitutes by making a concession the servo adjustment oil cylinder of oil cylinder 1, control valve group 2, single-action plunger piston 4, balancing cylinder 5, actuator 6 and Electric Actuated Stop Valves 9.
The yielding oil cylinder 1 of the utility model is a two-way cylinder; Comprise rod chamber 12 and rodless cavity 13; Wherein rodless cavity filler opening 10 is connected with the oil feed line and the fuel tank of hydraulic system through control valve group 2; Rod chamber filler opening 8 is communicated with the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger piston, and the rod chamber 12 of yielding oil cylinder 1 and the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger piston are in series.Between rod chamber filler opening 8 and rodless cavity filler opening 10, be provided with bleed off circuit 14, as shown in Figure 2, so the rod chamber filler opening 8 of the yielding oil cylinder 1 of the utility model is a tee union with rodless cavity filler opening 10.Electric Actuated Stop Valves 9 is arranged on the bleed off circuit 14.When proper functioning, Electric Actuated Stop Valves 9 is in cut-off state.When needs displacement fluid, connect Electric Actuated Stop Valves 9, the rod chamber filler opening 8 of making a concession oil cylinder 1 is communicated with rodless cavity filler opening 10 constitutes a new big latus rectum oil circuit, the oil-feed oil circuit P during as displacement fluid.Make a concession two oil pockets of oil cylinder 1 this moment; Be that rod chamber 12 is communicated with through bleed off circuit 14 with rodless cavity 13; Owing to exist difference in areas between the effective active area of rod chamber piston and the effective active area of rodless cavity piston; Under the effect of the difference that acts on the active force on the piston, it is motionless that piston and piston rod 7 will remain on extended position this moment.
The oil pocket of the servo adjustment oil cylinder 4 of above-mentioned single-action plunger piston also is connected with the fuel tank of hydraulic system behind filter through control valve group 2, constitutes oil return circuit T.The plunger of the servo adjustment oil cylinder 4 of single-action plunger piston links together through the piston rod of actuator 6 and two balancing cylinders 5 simultaneously.And these two balancing cylinders 5 are one-way cylinder, and its rod chamber is an oil pocket, and this oil pocket is connected with the oil feed line of hydraulic system through control valve group 2.
When the adjustment roll gap; Make a concession the lifting action of oil cylinder 1 through 2 controls of control valve group; Make the servo adjustment oil cylinder 4 of single-action plunger piston and make a concession oil circuit oil-feed and the oil return that oil cylinder 1 is connected and constituted, accomplish the adjustment function and yielding function of the servo adjustment oil cylinder 4 of single-action plunger piston.Wherein making a concession oil cylinder 1 is by one in the control valve group 2 big direction of the traffic valve control action.
Seeing also shown in Figure 3ly, is the equivalent oil circuit schematic representation of bleed off circuit of the yielding oil cylinder of the utility model.By understanding the utility model among the figure clearly in the working principle of making a concession after oil cylinder 1 is set up bleed off circuit 14.In the utility model; By the bleed off circuit 14 of making a concession oil cylinder 1; Because the servo adjustment oil cylinder 4 of single-action plunger piston is the opposite also one-way cylinders of coordination of two force directions with balancing cylinder 5; In the process of displacement fluid, balancing cylinder 5 feeds pressure oil all the time, makes balancing cylinder 5 have lifting force to exist all the time through actuator's servo adjustment oil cylinder 4 of 6 pairs of single-action plunger pistons.When control valve group 2 is made a concession the lifting action of oil cylinder 1 through former control loop control; Because oil-feed and oil return function that the control valve group 2 of oil cylinder 1 has control fluid are made a concession in control; And the latus rectum of the directional control valve of control oil-feed and oil return is bigger in the control valve group 2, and the flow that passes through is also very big.After the Electric Actuated Stop Valves on the bleed off circuit 14 of making a concession oil cylinder 19 is connected; When press at operating table depress action command fast after; Control valve group 2 is connected oil-feed oil circuit P and oil feed line; Because at the effective active area of the rodless cavity piston of making a concession oil cylinder 1 effective active area greater than the rod chamber piston; Make piston and the piston rod 7 of making a concession oil cylinder 1 be in the state of stretching out all the time; And the cleaning fluid in the oil feed line also no longer get into to be made a concession in the cylinder body 11 of oil cylinder 1, but gets in the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger pistons through bleed off circuit 14, this moment because the active force that the plunger of the servo adjustment oil cylinder 4 of single-action plunger piston stretches out greater than the castering action power of compensating cylinder 5; So the plunger of the servo adjustment oil cylinder 4 of single-action plunger piston stretches out, clean fluid is entered into the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger piston through control valve group 2 and bleed off circuit 14 by fuel tank.
When press quick yielding action command at operating table after; Control valve group 2 is connected oil return circuit T and fuel tank; Because making a concession the pressure difference of piston position in the oil cylinder 1 does not still change; So it is motionless that piston and piston rod 7 still remain on the state of stretching out; This moment is because the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger piston passes through control valve group 2 and oil return circuit T is communicated with fuel tank; Make the pressure in servo adjustment oil cylinder 4 oil pockets of single-action plunger piston reduce, the active force of the hydraulic oil that the plunger of the servo adjustment oil cylinder 4 of single-action plunger piston this moment is suffered is much smaller than the lifting force of compensating cylinder 5, thereby the plunger that the servo adjustment oil cylinder 4 of single-action plunger piston is stretched out turns back in the oil cylinder 4; The fluid that has pollutant is pushed back in the fuel tank behind control valve group 2 and filter through oil return circuit T, accomplish the oil-feed and the oil return actuation cycle of the servo adjustment oil cylinder 4 of single-action plunger piston.
So make after the servo adjustment oil cylinder 4 of single-action plunger piston carries out repeatedly the do action near total travel; Fluid clean in the fuel tank is entered in the oil pocket of the servo adjustment oil cylinder 4 of single-action plunger piston; And the cleanliness that makes final residual fluid in servo adjustment oil cylinder 4 oil pockets of single-action plunger piston is brought up to the desired cleanliness of servovalve of the servo adjustment oil cylinder 4 of coincidence control single-action plunger piston, thus the proper functioning of the system of assurance.
The function of the pollution fluid that the described displacement servo-cylinder of the utility model is inner is carried out just debugging and equipment operation initial stage in hydraulic system, has extraordinary effect.Can avoid not possessing at present the defective that the machine of this function is only just handled when akinesia, be on the time of operation or on to the performance impact of valve member, all be minimum.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Though the utility model discloses as above with preferred embodiment, yet be not that any professional and technical personnel of being familiar with is not in breaking away from the utility model technological scheme scope in order to qualification the utility model; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from the utility model technological scheme, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of the utility model technological scheme according to the technical spirit of the utility model.
Claims (4)
1. replace the loop that the servo-system master cylinder pollutes fluid fast for one kind, it comprises:
One makes a concession oil cylinder, and this yielding oil cylinder comprises rod chamber and rodless cavity, and wherein this rod chamber and this rodless cavity have a rod chamber filler opening and a rodless cavity filler opening respectively;
One control valve group, this this rodless cavity filler opening of making a concession oil cylinder is connected with an oil feed line and a fuel tank through this control valve group;
The servo adjustment oil cylinder of one single-action plunger piston, its oil pocket is in series through this rod chamber filler opening and this rod chamber, and is connected with this fuel tank behind filter through this control valve group; And
Two balancing cylinders, its piston rod links together through the plunger of an actuator and the servo adjustment oil cylinder of this single-action plunger piston, and the rod chamber of these two balancing cylinders also is connected with this oil feed line through this control valve group simultaneously;
It is characterized in that,
Between the rod chamber filler opening of this yielding oil cylinder and this rodless cavity filler opening, be provided with a bypass oil circuit, this bleed off circuit is provided with an Electric Actuated Stop Valves.
2. quick displacement servo-system master cylinder according to claim 1 pollutes the loop of fluid, it is characterized in that wherein said rodless cavity filler opening is to be connected with this oil feed line and this fuel tank through one in this control valve group big direction of the traffic valve.
3. quick displacement servo-system master cylinder according to claim 1 pollutes the loop of fluid, it is characterized in that wherein said balancing cylinder is an one-way cylinder.
4. quick displacement servo-system master cylinder according to claim 1 pollutes the loop of fluid, it is characterized in that this rod chamber filler opening of wherein said yielding oil cylinder and this rodless cavity filler opening are a tee union.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200116599U CN202125481U (en) | 2011-01-11 | 2011-01-11 | Circuit used to quickly replace contaminated oil in master cylinder of servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200116599U CN202125481U (en) | 2011-01-11 | 2011-01-11 | Circuit used to quickly replace contaminated oil in master cylinder of servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125481U true CN202125481U (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200116599U Expired - Lifetime CN202125481U (en) | 2011-01-11 | 2011-01-11 | Circuit used to quickly replace contaminated oil in master cylinder of servo system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125481U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452962A (en) * | 2013-09-11 | 2013-12-18 | 冯广建 | Controller for transforming start-up sequentially |
| CN105041768A (en) * | 2015-08-27 | 2015-11-11 | 三一重型装备有限公司 | Mine hydraulic cylinder capable of achieving hydraulic medium replacement under pressure |
| CN109185268A (en) * | 2018-11-13 | 2019-01-11 | 中国重型机械研究院股份公司 | A kind of stopper servo hydraulic cylinder |
-
2011
- 2011-01-11 CN CN2011200116599U patent/CN202125481U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452962A (en) * | 2013-09-11 | 2013-12-18 | 冯广建 | Controller for transforming start-up sequentially |
| CN105041768A (en) * | 2015-08-27 | 2015-11-11 | 三一重型装备有限公司 | Mine hydraulic cylinder capable of achieving hydraulic medium replacement under pressure |
| CN105041768B (en) * | 2015-08-27 | 2017-06-16 | 三一重型装备有限公司 | A kind of mining hydraulic medium displacement hydraulic cylinder with pressure |
| CN109185268A (en) * | 2018-11-13 | 2019-01-11 | 中国重型机械研究院股份公司 | A kind of stopper servo hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |
|
| CX01 | Expiry of patent term |