CN207406580U - The radiator oil return control system of oil cylinder - Google Patents
The radiator oil return control system of oil cylinder Download PDFInfo
- Publication number
- CN207406580U CN207406580U CN201721521147.0U CN201721521147U CN207406580U CN 207406580 U CN207406580 U CN 207406580U CN 201721521147 U CN201721521147 U CN 201721521147U CN 207406580 U CN207406580 U CN 207406580U
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- oil
- radiator
- control
- spool
- valve seat
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- 239000003921 oil Substances 0.000 claims abstract description 246
- 239000002828 fuel tank Substances 0.000 claims abstract description 17
- 239000010727 cylinder oil Substances 0.000 claims abstract description 4
- -1 hydraulic pump Substances 0.000 claims abstract 2
- 239000012530 fluid Substances 0.000 claims description 15
- 230000017525 heat dissipation Effects 0.000 abstract description 8
- 230000017105 transposition Effects 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a kind of radiator oil return control system of oil cylinder, including fuel tank, hydraulic pump, oil cylinder, the hand-operated direction valve being connected between hydraulic pump and oil cylinder, the radiator being connected on oil cylinder oil return line, radiating control valve is further included, the radiating control valve includes control valve seat and control spool；The control valve seat is equipped with oil inlet, left oil outlet and right oil outlet, and the oil return of the oil cylinder connects the oil inlet, and the left oil outlet and right oil outlet take back fuel tank, and the radiator is arranged between the left oil outlet and fuel tank.The utility model connects radiator and fuel tank respectively by two oil outlets of radiating control valve, when the return flow into oil inlet is small, radiator heat-dissipation can all be flow to, when big into return flow, control spool can move transposition, make the oil return of entrance that two-way be divided to flow out so that the oil return into radiator will not greatly be damaged due to flow large impact, extend the service life of radiator.
Description
Technical field
The utility model is related to piling machinery hydraulic system technical fields, and in particular to a kind of radiator oil return control of oil cylinder
System processed.
Background technology
All using executive component of the oil cylinder as groundwork mechanism, piling machinery is typically all many piling machinerys at present
The design of high-power and big flow, in this hydraulic system, it is assumed that pumpage is constant, and oil cylinder size cavity area is than to be common
Approximation 2:1.When oil cylinder is failure to actuate, oil return oil mass is the metered flow of pump；When the big chamber oil inlet of oil cylinder, small chamber oil return, system
Return flow is the 1/2 of pump metered flow；When the small chamber oil inlet of oil cylinder, big chamber oil return, the return flow of system is pump metered flow
2 times.In such systems if radiator is connected in oil return, because the variation of flow system flow is very big, not only radiator needs
The radiator that metered flow is system maximum stream flow is selected, and because changes in flow rate scope is big, impact is big, and radiator is easy to damage
It is bad.Solution common at present is to increase the heat dissipation that a hydraulic circuit is individually used for radiator, this set hydraulic circuit is general
Including pump group and associated ping, and additional consumption system power is needed, cost is higher.
The patent document of Application No. 201420268960.1 discloses a kind of for no-dig technique horizontal directional drill Oil cylinder
The hydraulic system of radiator protection, this system includes fuel tank, return filter, cooler, accumulator and check valve, with main valve
The cooler of oil return circuit connection is connected by filter with fuel tank, and external accumulator and check valve on oil return circuit, it is
Radiator is solved since return filter blocking causes pressure rise so as to which what is be easily damaged asks by accumulator and check valve
Topic is different from the application.
Utility model content
The main purpose of the utility model is to provide a kind of radiator oil return control system of oil cylinder, it is intended to solve existing
Big return flow during the big chamber oil return of oil cylinder all be easy to cause the problem of radiator damages by radiator.
To achieve the above object, the utility model proposes a kind of radiator oil return control system of oil cylinder, including fuel tank, liquid
Press pump, oil cylinder, the hand-operated direction valve being connected between hydraulic pump and oil cylinder, the radiator being connected on oil cylinder oil return line, also
Including radiating control valve, the radiating control valve includes control valve seat and control spool；The control valve seat is equipped with oil inlet, a left side
Oil outlet and right oil outlet, the oil return of the oil cylinder connect the oil inlet, and the left oil outlet and right oil outlet take back fuel tank,
The radiator is arranged between the left oil outlet and fuel tank；The left end of the control spool is equipped with resetting spring, when into institute
When stating the control shortage of oil in radiating control valve to overcome the frictional resistance of the spring force of the resetting spring and control spool, institute
It states control spool and is in right position, the oil inlet is only turned on the left oil outlet, the control in the entrance radiating control valve
When liquefaction can overcome the spring force of the resetting spring and control the frictional resistance of spool, the control spool is in left position,
The oil inlet turns on simultaneously with left oil outlet and right oil outlet.
Further, the valve seat annular that the control valve seat inner wall is provided between left oil outlet and right oil outlet is recessed
Slot, the oil inlet connect the valve seat annular groove, and the control valve outer core is formed with the left annular groove of spool, way station
The right annular groove of shoulder, spool；When the control spool is in right position, the oil inlet is recessed via the valve seat annular successively
The left annular groove of slot, spool is turned on left oil outlet；When the control spool is in left position, the oil inlet passes through successively all the way
The valve seat annular groove, the left annular groove of spool are turned on left oil outlet, and another way is successively through the valve seat annular groove, valve
The right annular groove of seat is turned on right oil outlet.
Further, the control valve seat has left end cap, and the resetting spring is arranged on the control spool and left end cap
Between.
Further, the left end cap is equipped with the adjusting screw for connecting the resetting spring.
Further, the oil cylinder is single lever-type two-way ram cylinder, including big chamber and small chamber.
Further, the hand-operated direction valve is three six-way transfer valves, and Median Function is arranged to：Middle position oil inlet P 1
Middle position oil outlet P2 is connected, drive hydraulic fluid port P3, the first actuator port A, the second actuator port B and returns hydraulic fluid port O disconnections, the first work
Hydraulic fluid port A and the second actuator port B connects the big chamber of the oil cylinder and small chamber respectively, and middle position oil outlet P2 connects institute with hydraulic fluid port O is returned
State the oil inlet of radiating control valve.
Further, the control valve seat has right end cap, and the control spool right end is equipped with right shoulder, the right shoulder
Right chamber is formed between right end cap, the right end cap is equipped with control mouth, and the control is connected from the oil return of the small chamber of the oil cylinder
Mouthful.
Compared with prior art, the advantageous effect of technical solutions of the utility model：
First, the utility model is directed to oil cylinder size chamber oil return principle, sets a radiating control valve, which is set
Two oil outlets connect radiator and fuel tank respectively, when the return flow into oil inlet is small, can all flow to radiator
Heat dissipation, when big into return flow, control spool can move transposition, make the oil return of entrance that two-way be divided to flow out so that enter
The oil return of radiator will not greatly be damaged due to flow large impact, extend the service life of radiator, and then ensure that whole
A hydraulic system is reliable and stable.
2nd, the utility model radiating control valve arrangement is simple, and the opening that right oil outlet can be also adjusted by adjusting screw is big
It is small, it is simple and practical, and the flexibility and reliability that works.
3rd, the utility model radiating control valve right end is additionally provided with to connect the control mouth of small chamber oil return, big chamber oil inlet,
The hydraulic oil entered during small chamber oil return by control mouth in radiating control valve cannot promote control spool, and oil return all passes through heat dissipation
Device in small chamber oil inlet, big chamber oil return, promotes control spool entering the hydraulic oil in radiating control valve by control mouth, dissipates
Heat control valve (HCV) can control the flow into radiator by adjusting screw.
4th, the heat dissipation of radiator, Huo Zhexian are individually used for by addition increasing a hydraulic circuit compared to existing
Some distributes oil cylinder oil return by complicated hydraulic circuit, and the utility model need to only increase a radiating control valve, and hydraulic pressure returns
Road is simple, radiator still can directly welding system oil return, simplify hydraulic system, reduce system power, reduce cost.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to the structure shown in these attached drawings.
Fig. 1 is the hydraulic schematic diagram of the radiator oil return control system for the oil cylinder that one embodiment of the utility model proposes；
Fig. 2 changes to hydraulic pressure original during left position for the middle control spool of the radiator oil return control system of Fig. 1 oil cylinders proposed
Reason figure.
The drawing reference numeral explanation of the utility model：
| Label | Title | Label | Title |
| 1 | Fuel tank | 623 | The right annular groove of spool |
| 2 | Hydraulic pump | 624 | Right shoulder |
| 3 | Hand-operated direction valve | 63 | Resetting spring |
| 4 | Oil cylinder | 64 | Adjusting screw |
| 41 | Big chamber | P1 | Middle position oil inlet |
| 42 | Small chamber | P2 | Middle position oil outlet |
| 5 | Radiator | P3 | Drive hydraulic fluid port |
| 6 | Radiating control valve | A | First working hole |
| 61 | Control valve seat | B | Second working hole |
| 611 | Valve seat annular groove | O | Return hydraulic fluid port |
| 612 | Control mouth | T | Oil inlet |
| 62 | Control spool | T1 | Left oil outlet |
| 621 | The left annular groove of spool | T2 | Right oil outlet |
| 622 | Intermediate shoulder |
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that described embodiment is only the part of the embodiment rather than whole of the utility model
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each component etc., such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, it and cannot be managed in the utility model such as relating to the description of " first ", " second " etc. is only used for description purpose
It solves to indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Define as a result, " the
One ", at least one this feature can be expressed or be implicitly included to the feature of " second ".It is " more in the description of the utility model
It is a " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " connection ", " fixation " etc. should do broad sense reason
Solution, for example, " fixation " can be fixedly connected or be detachably connected or integrally；It can be mechanical connection, also may be used
Be electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements
Or the interaction relationship of two elements, unless otherwise restricted clearly.It for the ordinary skill in the art, can be with
Concrete meaning of the above-mentioned term in the utility model is understood as the case may be.
In addition, the technical solution between each embodiment of the utility model can be combined with each other, but must be with ability
Domain those of ordinary skill can be implemented as basis, will be understood that when the combination appearance of technical solution is conflicting or can not realize
The combination of this technical solution is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of radiator oil return control systems of oil cylinder.
It refer to Fig. 1, the radiator oil return control system of oil cylinder, including fuel tank 1, hydraulic pump 2, hand-operated direction valve 3, oil cylinder
4th, radiator 5, radiating control valve 6.
Manually reversal valve 3 connects the oil cylinder 4 to the output oil port of the hydraulic pump 2, and the oil cylinder 4 is double for single lever-type
Piston cylinder is acted on, both ends can be passed through pressure oil or oil return, and to realize bidirectional-movement, rodless cavity is big chamber 41, has bar
Chamber is small chamber 42, and since rodless cavity effective active area is more than the effective active area of rod chamber, the oil return of small chamber 42 is slow,
Recirculating oil quantity is few.
Specifically, the hand-operated direction valve 3 is three six-way transfer valves, and Median Function is arranged to：Middle position oil inlet P 1
Middle position oil outlet P2 is connected, drive hydraulic fluid port P3, the first actuator port A, the second actuator port B and returns hydraulic fluid port O disconnections, it is upper under
Median function is respectively chiasma type conducting and through-type conducting.Two actuator ports connect the big chamber 41 of the oil cylinder 4 and small respectively
Chamber 42.Bottom is commutated to by operating the hand-operated direction valve 3 as a result, the oil cylinder 4 is big chamber oil inlet, is operated described manual
Reversal valve changes 3 to upper, and the oil cylinder 4 is small chamber oil inlet.
The radiating control valve 6 includes control valve seat 61, control spool 62, resetting spring 63 and adjusting screw 64.It is described
61 inner wall of control valve seat is provided with left oil outlet T1, valve seat annular groove 611, right oil outlet T2, the valve seat successively from left to right
Oil inlet T is equipped at annular groove 611；The left annular groove of spool is sequentially formed with from left to right on control 62 outer wall of spool
621st, intermediate shoulder 622, the right annular groove 623 of spool, right shoulder 624.The right side of the right shoulder 624 and the control valve seat 61
Right chamber is formed between end cap, the control mouth 612 that oil connects the right chamber is opened on the right end cap of the control valve seat 61.The small chamber
Oil return connect the control mouth 612.
When the control spool 62 is in right position, intermediate 622 right hand edge of shoulder is located at the valve seat annular groove
On the right side of 611 right hand edges, the annular groove 621 left with spool of valve seat annular groove 611 turns on, i.e. oil inlet T and left oil outlet
T1 is turned on；The annular groove 623 right with spool of valve seat annular groove 611 disconnects, i.e. oil inlet T is not led with right oil outlet T2
It is logical.When the control spool 62 is in left position, intermediate 622 left and right edges of shoulder are located at the valve seat annular groove 611
Between left and right edges, the valve seat annular groove 611 and the left annular groove 621 of spool and the right annular groove 623 of spool all turn on,
That is oil inlet T is turned on simultaneously with left oil outlet T1 and right oil outlet T2.
Also, the control spool 62 is resetted by the resetting spring 63, and the resetting spring 63 is arranged on described
Between the left end cap of control valve seat 61 and control spool 62.The tool of resetting spring 63 is there are one spring force, into the control valve seat
Hydraulic oil applies right end cap there are one oil pressure in 61 valve chambers, is less than the resetting spring 63 when entering oil pressure in valve chamber
During the frictional resistance of spring force and control spool, the control spool 62 is in right position；It is more than institute when entering oil pressure in valve chamber
When stating the spring force of resetting spring 63 and controlling the frictional resistance of spool, the control spool 62 is driven to move to left, i.e., described heat dissipation
Control valve 6 when being less than certain value into hydraulic fluid pressure, all through the first oil return inlet T 1 discharge by oil return, into hydraulic oil pressure
When power is more than certain value, oil return just divides two-way to be discharged respectively from the first oil return inlet T 1 and the second oil return inlet T 2.
Wherein, the two actuator port A/B connections oil cylinders 4 of the hand-operated direction valve 3, in the hand-operated direction valve 3
The position oil outlet P2 and oil inlet T for returning the hydraulic fluid port O connections radiating control valve 6, the i.e. oil return of oil cylinder 4 enter the radiating control
The oil inlet T of valve 6.The radiator 5 is located on the flowline of the left oil outlet T1, the flowline of the right oil outlet T2
Road directly takes back fuel tank 1, and thus the radiating control valve 6 is allocated back to oil circuit footpath according to the size of 4 oil return of oil cylinder, and then adjusts
Section enters the ratio of oil return in radiator 5, so as to fulfill the protection to radiator 5.
The control method of the radiator oil return control system of the oil cylinder is specially：
First, as shown in Figure 1, starting the hydraulic pump 2, operation hand-operated direction valve 3 commutates to bottom, at this time the oil cylinder 4
For the state of the small chamber oil return of big chamber oil inlet, the frictional resistance of the spring force and control spool that design the resetting spring 63 is more than back
Oil pocket hydraulic oil acts on the power on 62 right side of control spool.The control spool 62 is in the effect of the resetting spring 63
Under, positioned at right position.Small 42 oil return of chamber of oil cylinder is few, the hydraulic oil come at this time from oil inlet T, can all be controlled by the heat dissipation
First oil return inlet T 1 of valve 6 processed flows to the radiator 5, then flows back to fuel tank 1 by radiator 5.
2nd, as shown in Fig. 2, starting the hydraulic pump 2, operation hand-operated direction valve 3 is to upper, and the oil cylinder 4 is small at this time
The state of the big chamber oil return of chamber oil inlet, the control spool 62 overcome the reset bullet under the pressure effect of small 42 hydraulic oil of chamber
The spring force of spring 63 moves to left position to the left, and big 41 oil return of chamber of oil cylinder is big, and an oil return part is passed through the radiating control at this time
First oil return inlet T 1 of valve 6 is back to radiator 5, and another part passes through 2 oil return box 1 of the second oil return inlet T.
So that when being more than certain value into the hydraulic fluid pressure in the radiating control valve 6, just pass through the control
The mobile reduction of spool 62 processed is into hydraulic-oil quantity in the radiator 5, to protect radiator 5.The adjusting screw 64 is used
The maximum displacement being located in the limitation control spool 62 in the control valve seat 61, by adjusting the adjusting screw 64, also
The ratio from the left oil outlet T1 and right oil outlet T2 outflow hydraulic oil can be controlled.
The control of the utility model by the use of hydraulic oil source as the control spool 62 of the small chamber 42 of oil cylinder is oily, it is assumed that hydraulic pressure
The discharge capacity of pump 2 is constant, and 4 size cavity area of oil cylinder is than for common approximation 2:1, when 41 oil inlet of big chamber of oil cylinder 4, small chamber 42 returns
Oil is at this time the 1/2 of 2 oil drain quantity of hydraulic pump to the recirculating oil quantity of oil inlet T, and the pressure of the small chamber of oil cylinder is return pressure, pressure compared with
Low, control spool 62 is located at 61 right position of control valve seat under spring force, all passes through heat dissipation by T1 from the oil inlet of oil inlet T
Device 5.It is at this time 2 times of hydraulic pump oil drain quantity to the recirculating oil quantity of oil inlet T when small 42 oil inlet of chamber of oil cylinder 4, the small chamber 42 of oil cylinder
Pressure for operating pressure, control spool 62 will act in operating pressure and be moved to 61 left position of control valve seat, from oil inlet T's
Oil inlet is partly into left oil outlet T1 again by radiator 5, another part by the direct oil return boxes 1 of right oil outlet T2, by
This can control the maximum oil drain quantity by radiator 5 not allow radiator 5 perishable within pump oil drain quantity.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model
Conversion or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (7)
1. a kind of radiator oil return control system of oil cylinder, including fuel tank, hydraulic pump, oil cylinder, be connected to hydraulic pump and oil cylinder it
Between hand-operated direction valve, the radiator that is connected on oil cylinder oil return line, which is characterized in that further include radiating control valve, it is described
Radiating control valve includes control valve seat and control spool；The control valve seat is equipped with oil inlet, left oil outlet and right oil outlet, institute
The oil return for stating oil cylinder connects the oil inlet, and the left oil outlet and right oil outlet take back fuel tank, and the radiator is arranged on described
Between left oil outlet and fuel tank；
The left end of the control spool is equipped with resetting spring, when the control shortage of oil in the entrance radiating control valve is to overcome
State resetting spring spring force and control spool frictional resistance when, the control spool is in right position, the oil inlet only with
The left oil outlet conducting, when the spring force that the resetting spring can be overcome into the control oil in the radiating control valve and
When controlling the frictional resistance of spool, the control spool be in left position, the oil inlet and meanwhile with left oil outlet and right oil outlet
Conducting.
2. the radiator oil return control system of oil cylinder as described in claim 1, which is characterized in that the control valve seat inner wall is opened
There is the valve seat annular groove between left oil outlet and right oil outlet, the oil inlet connects the valve seat annular groove, institute
It states control valve outer core and is formed with the left annular groove of spool, intermediate shoulder, the right annular groove of spool；
When the control spool is in right position, the oil inlet is recessed via the valve seat annular groove, the left annular of spool successively
Slot is turned on left oil outlet；
When the control spool is in left position, the oil inlet is all the way successively through the valve seat annular groove, the left annular of spool
Groove is turned on left oil outlet, and another way turns on successively through the valve seat annular groove, the right annular groove of valve seat with right oil outlet.
3. the radiator oil return control system of oil cylinder as described in claim 1, which is characterized in that the control valve seat has a left side
End cap, the resetting spring are arranged between the control spool and left end cap.
4. the radiator oil return control system of oil cylinder as claimed in claim 3, which is characterized in that the left end cap is equipped with connection
The adjusting screw of the resetting spring.
5. the radiator oil return control system of oil cylinder as described in claim 1, which is characterized in that the oil cylinder is double for single lever-type
Piston cylinder is acted on, including big chamber and small chamber.
6. the radiator oil return control system of oil cylinder as claimed in claim 5, which is characterized in that the hand-operated direction valve is three
Position six-way transfer valve, Median Function are arranged to：Middle position oil inlet P 1 connects middle position oil outlet P2, driving hydraulic fluid port P3, the first work
Make hydraulic fluid port A, the second actuator port B and return hydraulic fluid port O disconnections, the first actuator port A and the second actuator port B connect the oil respectively
The big chamber and small chamber of cylinder, middle position oil outlet P2 connect the oil inlet of the radiating control valve with hydraulic fluid port O is returned.
7. the radiator oil return control system of oil cylinder as claimed in claim 5, which is characterized in that the control valve seat has the right side
End cap, the control spool right end are equipped with right shoulder, right chamber are formed between the right shoulder and right end cap, is set on the right end cap
There is control mouth, the control mouth is connected from the oil return of the small chamber of the oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721521147.0U CN207406580U (en) | 2017-11-15 | 2017-11-15 | The radiator oil return control system of oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721521147.0U CN207406580U (en) | 2017-11-15 | 2017-11-15 | The radiator oil return control system of oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207406580U true CN207406580U (en) | 2018-05-25 |
Family
ID=62319384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721521147.0U Active CN207406580U (en) | 2017-11-15 | 2017-11-15 | The radiator oil return control system of oil cylinder |
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| Country | Link |
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| CN (1) | CN207406580U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725538A (en) * | 2017-11-15 | 2018-02-23 | 恒天九五重工有限公司 | The radiator oil return control system and its control method of oil cylinder |
-
2017
- 2017-11-15 CN CN201721521147.0U patent/CN207406580U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725538A (en) * | 2017-11-15 | 2018-02-23 | 恒天九五重工有限公司 | The radiator oil return control system and its control method of oil cylinder |
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