CN207500214U - A kind of milling machine job control hydraulic system - Google Patents
A kind of milling machine job control hydraulic system Download PDFInfo
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- CN207500214U CN207500214U CN201721640261.5U CN201721640261U CN207500214U CN 207500214 U CN207500214 U CN 207500214U CN 201721640261 U CN201721640261 U CN 201721640261U CN 207500214 U CN207500214 U CN 207500214U
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Abstract
A kind of milling machine job control hydraulic system, including control valve group, hydraulic clutch, accumulator, tensioning hydro-cylinder, hydraulic oil container, system dynamic fuel tank, driving belt, tension pulley, control switch and fluid pressure line, it is characterized in that the control valve group is electrically connected with control switch, the P mouths of the control valve group connect system dynamic fuel tank by fluid pressure line, the T mouths of the control valve group are connected by fluid pressure line with hydraulic oil container, the A mouths of the control valve group are connected by fluid pressure line with hydraulic clutch, the B mouths of the control valve group are connected by fluid pressure line with the rodless cavity of accumulator and tensioning hydro-cylinder；The beneficial effects of the utility model are：Two-bit triplet solenoid directional control valve and one-way throttle valve I, one-way throttle valve II are employed, simple in structure, control is easy to operate, and product improves the efficiency and stability of hydraulic control system, effectively reduce failure rate convenient for manufacture and repair.
Description
Technical field
The utility model is related to technical field of hydraulic pressure more particularly to a kind of hydraulic systems for controlling milling machine work.
Background technology
Milling machine belongs to maintenance of surface construction equipment, is widely used in each grade bitumen road of highway, municipal traffic
The faces such as face, the airfield runway and port and pier layer large clearing of disease and the plucking of overburden operation and cement pavement are existing
Indispensable large-scale maintenance of surface equipment in generation ripe maintenance of surface construction technology.
The equipment of milling machine includes milling storehouse and milling and planing drum, and the power transmission mode of milling and planing drum is broadly divided into mechanical skin
V belt translation, hydraulic drive, three kinds of chain drive, wherein machinery belt transmission are wide due to transmission efficiency, strong shock resistance
General application.The shortcomings that milling machine belt transmission, is, when equipment brings into operation, it is possible to occur belt cunning because of relaxing for belt
The situation of dynamic operation causes the heel and toe wear of driving belt and belt wheel, even occurs the feelings of grouped belt tear when serious
Condition.
To overcome the above disadvantages, the structure of machinery belt transmission generally use hydraulic clutch+hydraulic pressure belt tension,
Hydraulic principle figure is shown in attached drawing 1.The patent of invention of the patent No. 201210351546.2 discloses a kind of use controller and controls
The control method of the hydraulic system of the machine driven system of milling machine, control logic are：During startup, belt is first tensioned, delay one
Clutch is opened after fixing time, driving belt accesses the power of engine, is not in above-mentioned ask since belt is preferentially tensioned
Topic；During stopping, clutch first stops, and engine is separated with belt, and belt stops tensioning after a certain period of time for delay, also avoids
Problem is stated, this process is realized by controller.However, this design has the following disadvantages：The use of controller causes electrically
The complexity of circuit increases, and increases the failure rate and unstability of system.
Invention content
To solve the above-mentioned problems, the utility model provides a kind of milling machine job control hydraulic system, and purpose exists
In providing a kind of simple, control mode for being conveniently operated, can effectively reduce failure rate, improve stability.
To achieve the above object, milling machine job control hydraulic system provided by the utility model is realized in：Institute
Milling machine job control hydraulic system is stated, including control valve group, hydraulic clutch, accumulator, tensioning hydro-cylinder, hydraulic oil container, is
System power fuel tank, driving belt, tension pulley, control switch and fluid pressure line.
The control valve group is electrically connected with control switch, and the P mouths of the control valve group connect system by fluid pressure line and move
Power fuel tank, the T mouths of the control valve group are connected by fluid pressure line with hydraulic oil container, and the A mouths of the control valve group pass through liquid
Pressure pipe road is connected with hydraulic clutch, and the B mouths of the control valve group pass through the nothing of fluid pressure line and accumulator and tensioning hydro-cylinder
Rod cavity is connected；The rod chamber of tensioning hydro-cylinder is connected with hydraulic oil container, and the telescopic end of the telescopic rod of tensioning hydro-cylinder is provided with skin
Belt tensioner pulley, tension pulley are contacted with driving belt with roll mode.
The control valve group includes pressure reducing valve, two-bit triplet solenoid directional control valve, one-way throttle valve I, one-way throttle valve II；Two
The interface I of position three-way solenoid valve is connected by fluid pressure line with the T mouths of control valve group, two-bit triplet solenoid directional control valve
Interface II is connected by fluid pressure line with pressure reducing valve, the interface III of two-bit triplet solenoid directional control valve and one-way throttle valve I, unidirectional
Throttle valve II is connected；Pressure reducing valve respectively with the P of control valve group mouths, the T mouths of control valve group and two-bit triplet solenoid directional control valve phase
Connection；One-way throttle valve I is connected with the B mouths of control valve group, and one-way throttle valve II is connected with the A mouths of control valve group.
The two-bit triplet solenoid directional control valve control switch electrical connection.
The two-bit triplet solenoid directional control valve is connected by fluid pressure line with one-way throttle valve I and one-way throttle valve II respectively
It connects.
The beneficial effects of the utility model are：Employ two-bit triplet solenoid directional control valve and one-way throttle valve I, one-way throttle
Valve II, simple in structure, control is easy to operate, and product improves the efficiency and stabilization of hydraulic control system convenient for manufacture and repair
Property, effectively reduce failure rate.
Description of the drawings
The utility model is described in further detail below in conjunction with attached drawing.
Attached drawing 1 is prior art control hydraulic system principle figure；
Attached drawing 2 is the utility model structure diagram；
In attached drawing：1st, control valve group, 1.1, pressure reducing valve, 1.2, two-bit triplet reversal valve, 1.3, one-way throttle valve I, 1.4,
One-way throttle valve II, 2, hydraulic clutch, 3, accumulator, 4, tensioning hydro-cylinder, 5, hydraulic oil container.
Specific embodiment
In order to enable those skilled in the art to better understand the technical solutions of the present invention, below in conjunction with the accompanying drawings 2 and tool
Body embodiment is further described the utility model.It is it should be pointed out that suitable to the description of concrete structure and description in this part
Sequence is only the explanation to specific embodiment, is not construed as having any restrictions effect to the scope of protection of the utility model.
As shown in Figure 2, the milling machine job control hydraulic system, including control valve group 1, hydraulic clutch 2, accumulation of energy
Device 3, tensioning hydro-cylinder 4, hydraulic oil container 5, system dynamic fuel tank, driving belt, tension pulley, control switch and fluid pressure line,
It is characterized in that the control valve group 1 is electrically connected with control switch, the P mouths of the control valve group 1 connect system by fluid pressure line
Power fuel tank, the T mouths of the control valve group 1 are connected by fluid pressure line with hydraulic oil container 5, and the A mouths of the control valve group 1 are logical
It crosses fluid pressure line with hydraulic clutch 2 to be connected, the B mouths of the control valve group 1 pass through fluid pressure line and accumulator 3 and tensioning oil
The rodless cavity of cylinder 4 is connected；The rod chamber of tensioning hydro-cylinder 4 is connected with hydraulic oil container 5, and the telescopic rod of tensioning hydro-cylinder 4 stretches
End is provided with tension pulley, and tension pulley is contacted with driving belt with roll mode.
The control valve group 1 includes pressure reducing valve 1.1, two-bit triplet solenoid directional control valve 1.2, one-way throttle valve I 1.3, unidirectional
Throttle valve II 1.4；The interface I of two-bit triplet solenoid directional control valve 1.2 is connected by fluid pressure line with the T mouths of control valve group 1, and two
The interface II of position three-way solenoid valve 1.2 is connected by fluid pressure line with pressure reducing valve 1.1, two-bit triplet solenoid directional control valve
1.2 interface III is connected with one-way throttle valve I 1.3, one-way throttle valve II 1.4；The P with control valve group 1 respectively of pressure reducing valve 1.1
Mouthful, the T mouths of control valve group 1 are connected with two-bit triplet solenoid directional control valve 1.2；One-way throttle valve I 1.3 and the B mouths of control valve group 1
It is connected, one-way throttle valve II 1.4 is connected with the A mouths of control valve group 1.
The two-bit triplet solenoid directional control valve 1.2 is electrically connected with control switch.
The two-bit triplet solenoid directional control valve 1.2 by fluid pressure line respectively with one-way throttle valve I 1.3 and one-way throttle valve
II 1.4 are connected.
The specification size of one-way throttle valve restriction in the control valve group, depending on system pipeline latus rectum and length, sheet
Utility model does not limit.
During milling machine operation, the power switch of milling and planing drum is opened, the two-bit triplet solenoid directional control valve 1.2 of control valve group obtains
Electricity, system pressure oil enter pressure reducing valve 1.1 by the P mouths of control valve group 1, and the pressure oil after decompression is changed by two-bit triplet electromagnetism
Reach one-way throttle valve I 1.3 and one-way throttle valve II 1.4 to valve 1.2, because of the damping characteristic of one-way throttle valve throttle orifice, make oil
Liquid preferentially enters the rodless cavity of belt tension oil cylinder 4 by one-way throttle valve I 1.3, and the rod chamber fluid of belt tension oil cylinder 4 returns
To hydraulic oil container 5, driving belt is tensioned by the tension pulley of 4 telescopic rod telescopic end of tensioning hydro-cylinder；After belt tension, hydraulic pressure
Oil enters hydraulic clutch 2 by one-way throttle valve II 1.4 again, and hydraulic clutch 2 is made to be combined with engine, and milling and planing drum access is dynamic
Power, equipment start milling and plane operation.The accumulator 3 that 4 rodless cavity of tensioning hydro-cylinder connects is generates when 4 pressurize of tensioning hydro-cylinder and absorption work
Compression shock, maintain the pre-set constant pressure of belt tension.
When milling machine stops operation, the power switch of milling and planing drum is closed, two-bit triplet solenoid directional control valve 1.2 powers off, hydraulic pressure
Pressure oil in clutch 2 preferentially flows to hydraulic oil container 5, hydraulic clutch and engine by II 1.4 off-load of one-way throttle valve
Separation, cuts off the input power of milling and planing drum；Then the pressure oil in belt tension oil cylinder 4 and accumulator 3 passes through one-way throttle
I 1.3 pressure release of valve, tensioning hydro-cylinder 4 bounce back, and the tension pulley recycling of telescopic rod telescopic end, tightening belt returns back to relaxed state.
The utility model milling machine job control hydraulic system, it is simple in structure, control it is easy to operate, product convenient for manufacture and
Repair, improves the efficiency and stability of hydraulic control system, effectively reduces failure rate.
Claims (4)
1. a kind of milling machine job control hydraulic system, including control valve group（1）, hydraulic clutch（2）, accumulator（3）, tensioning
Oil cylinder（4）, hydraulic oil container（5）, system dynamic fuel tank, driving belt, tension pulley, control switch and fluid pressure line, it is special
Sign is the control valve group（1）It is electrically connected with control switch, the control valve group（1）P mouths system is connected by fluid pressure line
Power fuel tank, the control valve group（1）T mouths pass through fluid pressure line and hydraulic oil container（5）It is connected, the control valve group（1）
A mouths pass through fluid pressure line and hydraulic clutch（2）It is connected, the control valve group（1）B mouths pass through fluid pressure line and accumulation of energy
Device（3）And tensioning hydro-cylinder（4）Rodless cavity be connected；Tensioning hydro-cylinder（4）Rod chamber and hydraulic oil container（5）It is connected, is tensioned
Oil cylinder（4）The telescopic end of telescopic rod be provided with tension pulley, tension pulley is contacted with driving belt with roll mode.
2. milling machine job control hydraulic system according to claim 1, it is characterised in that the control valve group（1）Including
Pressure reducing valve（1.1）, two-bit triplet solenoid directional control valve（1.2）, one-way throttle valve I（1.3）, one-way throttle valve II（1.4）；Two three
Electric change valve（1.2）Interface I and control valve group（1）T mouths be connected, two-bit triplet solenoid directional control valve（1.2）Connect
Mouth II and pressure reducing valve（1.1）It is connected, two-bit triplet solenoid directional control valve（1.2）Interface III and one-way throttle valve I（1.3）, it is single
To throttle valve II（1.4）It is connected；Pressure reducing valve（1.1）Respectively with control valve group（1）P mouths, control valve group（1）T mouths and two
Position three-way solenoid valve（1.2）It is connected；One-way throttle valve I（1.3）With control valve group（1）B mouths be connected, one-way throttle
Valve II（1.4）With control valve group（1）A mouths be connected.
3. milling machine job control hydraulic system according to claim 2, it is characterised in that the two-bit triplet electromagnetism changes
To valve（1.2）It is electrically connected with control switch.
4. milling machine job control hydraulic system according to claim 3, it is characterised in that the two-bit triplet electromagnetism changes
To valve（1.2）By fluid pressure line respectively with pressure reducing valve（1.1）, control valve group（1）T mouths, one-way throttle valve I（1.3）And list
To throttle valve II（1.4）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721640261.5U CN207500214U (en) | 2017-11-30 | 2017-11-30 | A kind of milling machine job control hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721640261.5U CN207500214U (en) | 2017-11-30 | 2017-11-30 | A kind of milling machine job control hydraulic system |
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| Publication Number | Publication Date |
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| CN207500214U true CN207500214U (en) | 2018-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721640261.5U Active CN207500214U (en) | 2017-11-30 | 2017-11-30 | A kind of milling machine job control hydraulic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458365A (en) * | 2018-12-24 | 2019-03-12 | 江苏徐工工程机械研究院有限公司 | Construction machinery hydraulic system and engineering machinery |
| CN118066264A (en) * | 2024-04-19 | 2024-05-24 | 山推(德州)工程机械有限公司 | Control method and control system for driving tension of working rotor belt of pavement cold recycling machine |
-
2017
- 2017-11-30 CN CN201721640261.5U patent/CN207500214U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458365A (en) * | 2018-12-24 | 2019-03-12 | 江苏徐工工程机械研究院有限公司 | Construction machinery hydraulic system and engineering machinery |
| CN109458365B (en) * | 2018-12-24 | 2024-02-02 | 江苏徐工工程机械研究院有限公司 | Engineering machinery hydraulic system and engineering machinery |
| CN118066264A (en) * | 2024-04-19 | 2024-05-24 | 山推(德州)工程机械有限公司 | Control method and control system for driving tension of working rotor belt of pavement cold recycling machine |
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