CN106762879A - A kind of helicopter tractor wheel compresses hydraulic system - Google Patents
A kind of helicopter tractor wheel compresses hydraulic system Download PDFInfo
- Publication number
- CN106762879A CN106762879A CN201611227390.1A CN201611227390A CN106762879A CN 106762879 A CN106762879 A CN 106762879A CN 201611227390 A CN201611227390 A CN 201611227390A CN 106762879 A CN106762879 A CN 106762879A
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- China
- Prior art keywords
- pipeline
- hydraulic
- wheel
- helicopter
- way valve
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
A kind of helicopter tractor wheel compresses hydraulic system, solves and occurs wheel slippage when traction helicopter is turned or loosen；Including two hydraulic cylinders, accumulator, three-position four-way valve, hydraulic pump and liquid reserve tanks；Wherein hydraulic cylinder is divided into two cavitys by piston, the cavity that two hydraulic cylinders are provided with piston rod is interconnected by pipeline, the cavity for being not provided with piston rod is interconnected by pipeline, lead to and accumulator is connected on the pipeline for be not provided with plunger, the port of this two pipelines is connected to two interfaces of the three-position four-way valve with end；Two interfaces of the three-position four-way valve other end are connected with the pipeline for leading to liquid reserve tank, wherein a pipeline is provided with hydraulic pump；The invention has the advantages that reliability is high, operate the pinch roller frame easy to maintenance, that make tractor can freely to be stretched with the swing of helicopter front-wheel, while can be to wheel offer constant pressure.
Description
Technical field
The present invention relates to a kind of helicopter tractor, more particularly to a kind of helicopter tractor wheel compresses hydraulic system.
Background technology
At present, when helicopter tractor draws to helicopter, helicopter is it some times happens that turning, helicopter front-wheel
A deflection angle will be produced, it is necessary to helicopter tractor clamping lifting device is provided with the safeguard measure for adapting to front wheel nutation angle,
Slipped or loosening so as to avoid the occurrence of wheel.The country is existing more using stub nutation type, and this kind of measure can allow to clamp lifting device
Deflected in low-angle, but it is larger to the abrasion of elevating ram, easily cause elevating ram leakage of oil.
The content of the invention
In order to solve problem above, a kind of reliability of present invention offer is high, it is easy to maintenance to operate, can provide permanent to wheel
The helicopter tractor wheel of constant-pressure compresses hydraulic system.
Helicopter tractor wheel of the present invention compresses hydraulic system, including two hydraulic cylinders, accumulator, 3-position 4-ways
Valve, hydraulic pump and liquid reserve tank；Wherein hydraulic cylinder is divided into two cavitys by piston, and the cavity that two hydraulic cylinders are provided with piston rod passes through
Pipeline is interconnected, and the cavity for being not provided with piston rod is interconnected by pipeline, is led on the pipeline for being not provided with plunger
Connection accumulator, the port of this two pipelines is connected to two interfaces of the three-position four-way valve with end；Three-position four-way valve is another
Two interfaces at end are connected with the pipeline for leading to liquid reserve tank, wherein a pipeline is provided with hydraulic pump.
During work, the three-position four-way valve has three positions, and three-position four-way valve first is in first position, and hydraulic pump is from storage
Extract liquid medium in liquid case out, the cavity of non-piston rod is not provided with by three-position four-way valve input hydraulic cylinder, with liquid medium
Input hydraulic cylinder, constantly promotes hydraulic cylinder piston and piston rod to stretch out, so as to hold wheel tightly；When the pressure to wheel reach it is specified
During pressure, by three-position four-way valve switch between middle position, i.e. liquid reserve tank and hydraulic cylinder pipeline cut-out, hydraulic cylinder, accumulator and
A closed-loop path is formed between three-position four-way valve, hydraulic system pressure is balanced, and helicopter is straight-line travelling；When helicopter is turned
When, hydraulic cylinder is subject to the reaction force of wheel to exceed the rated pressure that accumulator is provided, and hydraulic cylinder shrinks, and unnecessary liquid is situated between
Matter is compressed in accumulator, and media interior pressure rises, until the rated pressure that accumulator is provided is equal to the reaction of wheel
Power, now hydraulic cylinder stopping is shunk；When helicopter returns to straight-line travelling from turning, hydraulic cylinder is subject to the reaction force of wheel to subtract
Small, now pressure medium starts to reduce in system, and accumulator discharges liquid medium to hydraulic cylinder, and hydraulic cylinder stretches out, until accumulation of energy
The reaction force that the rated pressure that device is provided is equal to；When drawing after hours, three-position four-way valve is in the 3rd position, hydraulic pump
The cavity that liquid medium is provided with piston rod by three-position four-way valve input hydraulic cylinder, hydraulic cylinder piston rod contracting are pumped out from liquid reserve tank
Return, unclamp wheel.
Helicopter tractor wheel of the present invention compresses hydraulic system, can freely be stretched with the swing of helicopter front-wheel
Contracting, in whole process, wheel can be subject to lasting, constant pressure, and the lateral attitude that inclined front-wheel can keep fixed is moved, because
This is not in that wheel slips or loosen phenomenon.
Further, a pipeline for leading to liquid reserve tank, the pipeline are connected between the three-position four-way valve and liquid reserve tank
It is provided with overflow valve.When the medium in liquid reserve tank is constantly excessive to the thrust that wheel is formed into hydraulic cylinder, overflow valve is beaten
Open, medium flows back to hydraulic oil container, protection wheel prevents from being subject to crushing.The pressure size of regulation relief valve, can adjust clamping frame to machine
The thrust of wheel.
Further, the hydraulic cylinder is oil cylinder, and the liquid reserve tank is fuel tank.
Further, the hydraulic pump of stating is for gear pump.
Brief description of the drawings
Fig. 1 is the structure chart that helicopter tractor wheel of the present invention compresses hydraulic system.
Each piece number explanation in figure：
1- gear pumps；2- overflow valves；3- three-position four-way valves；4- accumulators；5- compressed oil cylinders；6- hydraulic oil containers；7- pipelines A；8-
Pipeline B；9- pipelines C；10- pipelines D；11- chambers A；12- chambers B.
Specific embodiment
Hydraulic system is compressed with reference to Fig. 1 to helicopter tractor wheel of the present invention to describe in further detail.
As shown in figure 1, helicopter tractor wheel of the present invention compresses hydraulic system, including two compressed oil cylinders 5, storages
Energy device 4, three-position four-way valve 3, gear pump 1 and hydraulic oil container 6 and overflow valve 2.
The compressed oil cylinder 5 is divided into two cavitys by piston --- chamber A11 and chamber B12, piston rod, chamber are provided with the A11 of chamber
Piston rod is not provided with B12, as shown in Figure 1.
It is interconnected by pipeline A7 between two chamber A11 of compressed oil cylinder 5, is interconnected by pipeline B8 phases between the B12 of chamber
It is logical, accumulator 4 is connected on pipeline B8.
The port of pipeline A7 and pipeline B8 is connected to two interfaces of the three-position four-way valve with end；Three-position four-way valve is another
Two interfaces difference connecting line C9 and pipeline D10 at end, pipeline C9 is connected with hydraulic oil container 6, pipeline D10 and hydraulic oil container 6
Between be connected with hydraulic oil container 6 after combination gear pump 1 and overflow valve 2.
When helicopter straight-line travelling is drawn, three-position four-way valve 3 is in middle position, and now pipeline A and pipeline B passes through three four
Port valve 3 is connected, so that three-position four-way valve 3, accumulator 4 and compressed oil cylinder 5 constitute a loop for closure, when helicopter is turned
When, compressed oil cylinder 5 is subject to the reaction force of wheel to exceed the rated pressure that accumulator 4 is provided, and compressed oil cylinder 5 shrinks, and chamber A increases
Greatly, chamber B reduces, and the fluid in the B of chamber is compressed in accumulator 4, and fluid internal pressure rises, until the volume that accumulator 4 is provided
Constant-pressure is equal to the reaction force of wheel, and now the space of chamber A stops change, and compressed oil cylinder 5 stops shrinking.
When helicopter returns to straight-line travelling from turning, compressed oil cylinder 5 is subject to the reaction force of wheel to reduce, now system
Internal oil liquid pressure starts to reduce, and the release pressure oil liquid of accumulator 4 enters chamber B, and chamber B increases, chamber A reduce, and compressed oil cylinder 5 is stretched
Go out, until the rated pressure that 4 accumulators are provided is equal to the reaction force of wheel, oil system balance, compressed oil cylinder 5 stops stretching
Go out.In whole process, wheel can be subject to lasting pressure.
Control three-position four-way valve 3 arrives left position, and pipeline D10 and pipeline A7 is connected, and pipeline B8 and pipeline C9 is connected, hydraulic oil container
Oil in 6 is pumped into the A of chamber by gear pump 1, and compressed oil cylinder 5 withdraws, and wheel is released.
Control three-position four-way valve 3 arrives right position, and pipeline D10 and pipeline B8 is connected, and pipeline A7 and pipeline C9 is connected, hydraulic oil container
Oil in 6 is pumped into the B of chamber by gear pump 1, and compressed oil cylinder 5 stretches out, and wheel is gradually held tightly.When thrust is excessive, overflow
Valve 2 is opened, and fluid flows back to hydraulic oil container 6, protects wheel, prevents from being subject to crushing.
As described above, plan content given in conjunction with the accompanying drawings and embodiments, can derive similar technical scheme.But
Every content without departing from inventive technique scheme, any simply repaiies according to what technical spirit of the invention was made to above example
Change, equivalent variations and modification, still fall within the range of technical solution of the present invention.
Claims (5)
1. a kind of helicopter tractor wheel compresses hydraulic system, it is characterised in that：Including two hydraulic cylinders, accumulator, three
Four-way valve, hydraulic pump and liquid reserve tank；Wherein hydraulic cylinder is divided into two cavitys by piston, and two hydraulic cylinders are provided with the cavity of piston rod
It is interconnected by pipeline, the cavity for being not provided with piston rod is interconnected by pipeline, leads to the pipe for being not provided with plunger
Accumulator is connected on road, the port of this two pipelines is connected to two interfaces of the three-position four-way valve with end；Three-position four-way valve
Two interfaces of the other end are connected with the pipeline for leading to liquid reserve tank, wherein a pipeline is provided with hydraulic pump.
2. helicopter tractor wheel compresses hydraulic system according to claim 1, it is characterised in that：In the 3-position 4-way
A pipeline for leading to liquid reserve tank is connected between valve and liquid reserve tank, the pipeline is provided with overflow valve.
3. helicopter tractor wheel compresses hydraulic system according to claim 1, it is characterised in that：The hydraulic cylinder is oil
Cylinder, the liquid reserve tank is fuel tank.
4. helicopter tractor wheel compresses hydraulic system according to claim 1, it is characterised in that：The hydraulic cylinder is oil
Cylinder, the liquid reserve tank is fuel tank.
5. hydraulic system is compressed according to any helicopter tractor wheel of Claims 1-4, it is characterised in that：It is described to state
Hydraulic pump is gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227390.1A CN106762879A (en) | 2016-12-27 | 2016-12-27 | A kind of helicopter tractor wheel compresses hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227390.1A CN106762879A (en) | 2016-12-27 | 2016-12-27 | A kind of helicopter tractor wheel compresses hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762879A true CN106762879A (en) | 2017-05-31 |
Family
ID=58921876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611227390.1A Pending CN106762879A (en) | 2016-12-27 | 2016-12-27 | A kind of helicopter tractor wheel compresses hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106762879A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504140A (en) * | 2017-09-15 | 2017-12-22 | 广西柳工机械股份有限公司 | Rotating tensioning device for transmission chain and land leveller tandem-driving bogie |
| CN108488136A (en) * | 2018-02-12 | 2018-09-04 | 中国北方车辆研究所 | A kind of track takeup |
| CN114087238A (en) * | 2021-11-04 | 2022-02-25 | 武汉工程大学 | Hydraulic control system and control method of intelligent traction robot of airplane |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128409A (en) * | 1994-09-08 | 1996-05-21 | Shinmeiwa Auto Eng Kk | Synchronizing device of hydraulic cylinder |
| JP2002144943A (en) * | 2000-11-14 | 2002-05-22 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronous device of gate lifter |
| JP2002364604A (en) * | 2001-06-08 | 2002-12-18 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronization device of gate lifter provided with gate sinking prevention mechanism |
| CN201354777Y (en) * | 2009-02-18 | 2009-12-02 | 宁波凯荣船用机械有限公司 | Davit hydraulic structure |
| CN104235092A (en) * | 2014-09-18 | 2014-12-24 | 芜湖高昌液压机电技术有限公司 | Unilateral throttling synchronism loop of dual-column gantry lifting machine |
| CN204664017U (en) * | 2015-04-20 | 2015-09-23 | 谭建忠 | Synchronous compression pressurize continued compensation and relief circuit |
| CN206360947U (en) * | 2016-12-27 | 2017-07-28 | 青岛中汽特种汽车有限公司 | A kind of helicopter tractor wheel compresses hydraulic system |
-
2016
- 2016-12-27 CN CN201611227390.1A patent/CN106762879A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128409A (en) * | 1994-09-08 | 1996-05-21 | Shinmeiwa Auto Eng Kk | Synchronizing device of hydraulic cylinder |
| JP2002144943A (en) * | 2000-11-14 | 2002-05-22 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronous device of gate lifter |
| JP2002364604A (en) * | 2001-06-08 | 2002-12-18 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronization device of gate lifter provided with gate sinking prevention mechanism |
| CN201354777Y (en) * | 2009-02-18 | 2009-12-02 | 宁波凯荣船用机械有限公司 | Davit hydraulic structure |
| CN104235092A (en) * | 2014-09-18 | 2014-12-24 | 芜湖高昌液压机电技术有限公司 | Unilateral throttling synchronism loop of dual-column gantry lifting machine |
| CN204664017U (en) * | 2015-04-20 | 2015-09-23 | 谭建忠 | Synchronous compression pressurize continued compensation and relief circuit |
| CN206360947U (en) * | 2016-12-27 | 2017-07-28 | 青岛中汽特种汽车有限公司 | A kind of helicopter tractor wheel compresses hydraulic system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504140A (en) * | 2017-09-15 | 2017-12-22 | 广西柳工机械股份有限公司 | Rotating tensioning device for transmission chain and land leveller tandem-driving bogie |
| CN108488136A (en) * | 2018-02-12 | 2018-09-04 | 中国北方车辆研究所 | A kind of track takeup |
| CN114087238A (en) * | 2021-11-04 | 2022-02-25 | 武汉工程大学 | Hydraulic control system and control method of intelligent traction robot of airplane |
| CN114352590A (en) * | 2022-01-13 | 2022-04-15 | 四川鼎鸿智电装备科技有限公司 | Double-cylinder hydraulic mechanism and pressure equipment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |