CN103797965A - Stepless speed change hydraulic circuit of threshing cylinder of combine harvester - Google Patents
Stepless speed change hydraulic circuit of threshing cylinder of combine harvester Download PDFInfo
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- CN103797965A CN103797965A CN201410037138.9A CN201410037138A CN103797965A CN 103797965 A CN103797965 A CN 103797965A CN 201410037138 A CN201410037138 A CN 201410037138A CN 103797965 A CN103797965 A CN 103797965A
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Abstract
The invention discloses a stepless speed change hydraulic circuit of a threshing cylinder of a combine harvester. The stepless speed change hydraulic circuit comprises an oil tank, a hydraulic pump, a one-way valve, an overflow valve, a reversing valve, a hydraulic control one-way valve, a one-way throttle valve and a stepless speed change oil cylinder which are in matched connection through hydraulic pipelines. The reversing valve is a three-position six-way valve, an oil inlet of the reversing valve is communicated with the hydraulic pump, the hydraulic pump is communicated with the oil tank, an oil outlet of the reversing valve is communicated with the oil tank, a working oil port of the reversing valve is communicated with the hydraulic control one-way valve, the hydraulic control one-way valve and the stepless speed change oil cylinder are in series connection through the one-way throttle valve, and the overflow valve and the reversing valve are in parallel connection. The hydraulic circuit is simple in structure and high in practicality, the stepless speed change hydraulic cylinder is a single-acting oil cylinder, and thus oil taking, oil returning and pressure maintaining of a closed oil cavity can be achieved.
Description
Technical field
The present invention relates to a kind of hydraulic circuit, relate in particular to a kind of combine cylinder stepless speed changing hydraulic loop.
Background technology
Combine harvester header feeding is of short duration, and feed quantity is not easy direct measurement, at present the more stable threshing cylinder load secondary indication of conventional duty.Threshing cylinder load adopts the rotating speed of cylinder, moment of torsion and the cylinder power of drum shaft to represent conventionally, combined harvester all adopts adjustment drum rotation speed to reach the object of controlling feed quantity mostly at present, although drum rotation speed is more easily measured, but when threshing cylinder is worked under underload state, when threshing cylinder load increases, start function to respond in 0.4s, now threshing cylinder angular speed can automatically restore to original angular speed at short notice.Threshing cylinder moment of torsion is difficult for measurement but can be corresponding one by one with cylinder load, and threshing cylinder moment of torsion can represent with the oil pressure of threshing cylinder stepless speed variator system.Prerequisite is to be that hydraulic system is controlled by mechanical control break by threshing cylinder rotating speed, and therefore the present invention has designed the hydraulic circuit that drives threshing cylinder stepless speed variator system.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of combine cylinder stepless speed changing hydraulic loop, for driving threshing cylinder stepless speed variator system.
To achieve these goals, the technical solution used in the present invention is: a kind of combine cylinder stepless speed changing hydraulic loop, comprise the fuel tank being connected by fluid pressure line, hydraulic pump, check valve, overflow valve, reversal valve, hydraulic control one-way valve, the infinitely variable speeds oil cylinder of one-way throttle valve and cylinder, reversal valve is three six-way valves, the oil-in of reversal valve is communicated with hydraulic pump, hydraulic pump is communicated with fuel tank, the oil-out of reversal valve is communicated with fuel tank, the actuator port of reversal valve is communicated with hydraulic control one-way valve, hydraulic control one-way valve is connected with infinitely variable speeds oil cylinder by one-way throttle valve, overflow valve is in parallel with reversal valve.
The beneficial effect that the present invention brings is: system forms simple, practical, and stepless speed changing hydraulic oil cylinder is one-way cylinder, and oil-feed, oil return and the pressure that can realize oil closed cavity keep.This system is by driving threshing cylinder stepless speed variator system, and then realization represents threshing cylinder moment of torsion by oil pressure.
Accompanying drawing explanation
Fig. 1 is the circuit diagram in threshing cylinder stepless speed changing hydraulic loop.
Wherein, 1. reversal valve, 2. hydraulic control one-way valve, 3. one-way throttle valve, 4. infinitely variable speeds oil cylinder, 5. overflow valve, 6. fuel tank, 7. hydraulic pump, 8. check valve.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of combine cylinder stepless speed changing hydraulic loop, comprise the fuel tank 6 being connected by fluid pressure line, hydraulic pump 7, check valve 8, overflow valve 5, reversal valve 1, hydraulic control one-way valve 2, the infinitely variable speeds oil cylinder 4 of one-way throttle valve 3 and cylinder, described reversal valve 1 is three six-way valves, the oil-in of reversal valve 1 is communicated with hydraulic pump 7, hydraulic pump 7 is communicated with fuel tank 6, the oil-out of reversal valve 1 is communicated with fuel tank 6, the actuator port of reversal valve 1 is communicated with hydraulic control one-way valve 2, hydraulic control one-way valve 2 is connected with infinitely variable speeds oil cylinder 4 by one-way throttle valve 3, overflow valve 5 is in parallel with reversal valve 1.
In conjunction with the hydraulic circuit on combined harvester, the infinitely variable speeds oil cylinder of this threshing cylinder hydraulic stepless speed change hydraulic circuit is one-way cylinder, and oil-feed and oil return line are a hydraulic fluid port.Reversal valve 1 in the time of meta, the direct oil return case 6 of hydraulic oil, native system unloading.Oil in infinitely variable speeds oil cylinder 4 is also closed in oil cylinder, due to the pressure maintaining effect of hydraulic control one-way valve 2, can keep infinitely variable speeds oil cylinder 4 motionless, and threshing cylinder keeps constant rotational speed.In the time that manual three six-way transfer valves 1 are operated in left position, hydraulic oil is opened hydraulic control one-way valve 2,, is promoted hydraulic jack and moves to the steady fuel feeding of infinitely variable speeds oil cylinder 4 by one-way throttle valve 3, reduces gearratio.In the time that reversal valve 1 is worked right position, pressure oil is opened hydraulic control one-way valve 2 as guide oil, and in infinitely variable speeds oil cylinder 4, pressure oil is connected by the check valve in one-way throttle valve 3 and fuel tank 6, under belt tension effect, the fluid of infinitely variable speeds oil cylinder 4 flows back to fuel tank 6, increases gearratio.When threshing cylinder stepless speed changing mechanism is arranged in rotating shaft, conventionally utilize swivel joint isolation rotating shaft and outside oil circuit.
Claims (1)
1. a combine cylinder stepless speed changing hydraulic loop, it is characterized in that: comprise the fuel tank (6) being connected by fluid pressure line, hydraulic pump (7), check valve (8), overflow valve (5), reversal valve (1), hydraulic control one-way valve (2), the infinitely variable speeds oil cylinder (4) of one-way throttle valve (3) and cylinder, described reversal valve (1) is three six-way valves, the oil-in of reversal valve (1) is communicated with hydraulic pump (7), hydraulic pump (7) is communicated with fuel tank (6), the oil-out of reversal valve (1) is communicated with fuel tank (6), the actuator port of reversal valve (1) is communicated with hydraulic control one-way valve (2), hydraulic control one-way valve (2) is connected with infinitely variable speeds oil cylinder (4) by one-way throttle valve (3), overflow valve (5) is in parallel with reversal valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037138.9A CN103797965A (en) | 2014-01-26 | 2014-01-26 | Stepless speed change hydraulic circuit of threshing cylinder of combine harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410037138.9A CN103797965A (en) | 2014-01-26 | 2014-01-26 | Stepless speed change hydraulic circuit of threshing cylinder of combine harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103797965A true CN103797965A (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410037138.9A Pending CN103797965A (en) | 2014-01-26 | 2014-01-26 | Stepless speed change hydraulic circuit of threshing cylinder of combine harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103797965A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131266A (en) * | 2017-06-30 | 2017-09-05 | 洛阳慕畅传动科技有限公司 | A kind of automatically tensioning type PTO |
| CN109548465A (en) * | 2019-01-11 | 2019-04-02 | 雷沃重工股份有限公司 | The autocontrol method and control system and cropper of a kind of roller variable speed |
| CN112189455A (en) * | 2020-09-30 | 2021-01-08 | 江苏大学 | Self-locking hydraulic variable-diameter threshing cylinder and combine harvester |
| CN112239164A (en) * | 2020-10-15 | 2021-01-19 | 徐州重型机械有限公司 | Rotary control valve, rotary hydraulic system and engineering machinery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102668806A (en) * | 2012-06-01 | 2012-09-19 | 江苏大学 | Manual-automatic integrated hydraulic stepless speed regulation actuating mechanism of combine harvester |
| CN203723068U (en) * | 2014-01-26 | 2014-07-23 | 洛阳理工学院 | Continuously variable transmission hydraulic circuit for threshing drum of combine harvester |
-
2014
- 2014-01-26 CN CN201410037138.9A patent/CN103797965A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102668806A (en) * | 2012-06-01 | 2012-09-19 | 江苏大学 | Manual-automatic integrated hydraulic stepless speed regulation actuating mechanism of combine harvester |
| CN203723068U (en) * | 2014-01-26 | 2014-07-23 | 洛阳理工学院 | Continuously variable transmission hydraulic circuit for threshing drum of combine harvester |
Non-Patent Citations (1)
| Title |
|---|
| 卢文涛等: "谷物联合收获机喂入量建模与试验", 《农业机械学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131266A (en) * | 2017-06-30 | 2017-09-05 | 洛阳慕畅传动科技有限公司 | A kind of automatically tensioning type PTO |
| CN109548465A (en) * | 2019-01-11 | 2019-04-02 | 雷沃重工股份有限公司 | The autocontrol method and control system and cropper of a kind of roller variable speed |
| CN109548465B (en) * | 2019-01-11 | 2021-06-29 | 潍柴雷沃重工股份有限公司 | Automatic control method and system for stepless speed change of roller and harvester |
| CN112189455A (en) * | 2020-09-30 | 2021-01-08 | 江苏大学 | Self-locking hydraulic variable-diameter threshing cylinder and combine harvester |
| CN112189455B (en) * | 2020-09-30 | 2021-08-03 | 江苏大学 | Self-locking hydraulic variable-diameter threshing cylinder and combine harvester |
| CN112239164A (en) * | 2020-10-15 | 2021-01-19 | 徐州重型机械有限公司 | Rotary control valve, rotary hydraulic system and engineering machinery |
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Application publication date: 20140521 |