CN202099824U - Return oil circuit of reamer hydraulic motor of cutter suction dredger - Google Patents
Return oil circuit of reamer hydraulic motor of cutter suction dredger Download PDFInfo
- Publication number
- CN202099824U CN202099824U CN2011201674520U CN201120167452U CN202099824U CN 202099824 U CN202099824 U CN 202099824U CN 2011201674520 U CN2011201674520 U CN 2011201674520U CN 201120167452 U CN201120167452 U CN 201120167452U CN 202099824 U CN202099824 U CN 202099824U
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- China
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- oil
- hydraulic motor
- cartridge valve
- return oil
- pump
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Abstract
A return oil circuit of a reamer hydraulic motor of a cutter suction dredger can effectively reduce hydraulic impact on a return oil filter, an oil cooler and an oil pump suction flexible pipe in a reamer hydraulic system under the condition that traditional scheme functions are reserved. Circulation of the return oil circuit is formed by a cartridge valve, the return oil filter and the oil cooler which are sequentially connected in series with an oil outlet of the hydraulic motor and by the flexile pipe, an oil pump and the hydraulic motor which are sequentially connected in series with the outlet of the oil cooler. A slippage pump and a dumper are connected in parallel between an oil pump inlet and an oil tank. The return oil circuit is characterized in that a throttle plate is connected with the cartridge valve and the return oil filter in series and arranged between the cartridge valve and the return oil filter, an energy accumulator is connected with throttle plate in parallel in front of the throttle plate, and when a control oil circuit of the cartridge valve is in a working condition of digging, a controlling port of the cartridge valve is communicated with the oil tank directly and kept fully opened.
Description
Technical field
The utility model relates to Cutters for Dredgers hydraulic motor oil return line.
Background technology
Employing >=1MW high power hydraulic motor drives reamer on many cutter suntion dredgers of domestic construction in recent years, and corresponding reamer hydraulic system is an enclosed.Traditional system's design is to export the cartridge valve of connecting successively, oil return filter, oil cooler formation hydraulic motor oil return line in the motor oil return.Flow through again oil pump, motor of the oil of oil cooler outlet forms the fluid circulation, and guarantees the minimum suction pressure of oil pump by slippage pump.This design scheme is not established independent system's hydraulic oil and is filtered and cooling circuit; System equipment and layout have been simplified; But hydraulic shock very easily causes the damage of oil return filter, oil cooler and oil pump suction hose on the motor oil return line, and the employing seawater is that the oil cooler damage of cooling medium also causes serious oil pollution to the waters.
Summary of the invention
The utility model provides a kind of design scheme that is used for the high-power reamer hydraulic motor of cutter suntion dredger oil return line, is intended to keep under the condition of traditional scheme function, cuts down the hydraulic shock to oil return filter, oil cooler and oil pump suction hose effectively.
The utility model adopts cartridge valve, oil return filter, the oil cooler of being connected successively by the hydraulic motor oil-out; Oil cooler exports the flexible pipe of connecting successively, oil pump and hydraulic motor and constitutes circulation; Parallelly connected slippage pump and damping between oil pump inlet and the fuel tank is characterized in that the choke block of between cartridge valve and oil return filter, connecting, and before choke block parallelly connected accumulator; The control oil channel of cartridge valve is when dredging operating mode, and the control mouth of cartridge valve leads directly to fuel tank and maintaining valve standard-sized sheet.
The oil return line of this programme hydraulic motor is consistent with the connection of whole hydraulic system and traditional scheme; With the advantage of traditional scheme comparison be: in traditional scheme; The reamer hydraulic system is in to be stablized when dredging operating mode; Cartridge valve provides hydraulic motor required back pressure, and its value is set by the pressure regulator valve on the cartridge valve.After the pressure regulation reference point that cartridge valve is opened in the traditional scheme is valve; Can only stablize the pressure drop of cartridge valve front and back; During when the hydraulic motor fluctuation of load and in oil return line generation hydraulic shock, the force value that before cartridge valve, increases all is loaded into motor oil return line and the in-line of oil pump behind the cartridge valve.In traditional scheme, as the pressure reference point of opening of valves is changed to the fuel tank place, then the harm that causes of hydraulic shock is bigger.This programme has increased choke block, and it becomes the main damping on the hydraulic motor oil return line.It has two effects:, provide hydraulic motor required back pressure, and no longer born by cartridge valve when dredging operating mode stable; When the oil return line generation hydraulic shock of hydraulic motor, delay the release of impact energy and consume major part wherein.Choke block adopts the thin-walled borehole structure, square being directly proportional of the pressure drop on it and flow, and hydraulic shock plays a role clearly behind the reduction choke block.This programme has been set up accumulator before choke block, its main effect is the energy that absorbs hydraulic shock, and stable when dredging operating mode, the pressure on can also stable hydraulic motor return line improves the suction condition of oil pump.Because working pressure range is different, accumulator be located at before the choke block rather than after, can obviously improve the accumulation of energy effect.Cartridge valve standard-sized sheet (electromagnetic coil gets) and significantly lowered pressure drop own when dredging operating mode in this programme giving full play to the effect of choke block, and makes the back pressure of hydraulic motor unlikely too high; Cartridge valve presents bigger damping (electromagnetic coil dead electricity) when reamer braking or reverse jiggering state, and opening pressure is set by the pressure regulator valve on the cartridge valve.
Description of drawings
Fig. 1 is the reamer hydraulic system principle figure of traditional scheme;
Fig. 2 is the reamer hydraulic system principle figure of the utility model.
The specific embodiment
The utility model is at the oil-out of hydraulic motor 1 connect successively cartridge valve 2, choke block 11, oil return filter 3, oil cooler 4, parallelly connected accumulator 10 before choke block.Being connected to of hydraulic motor oil return line and whole system: connect the hydraulic motor oil-in behind oil cooler outlet series connection flexible pipe 8, the oil pump 9 and form circulating oil path, parallelly connected slippage pump 7 and the repairing oil circuit of damping 5 formations between flexible pipe and fuel tank 6 to oil pump.
Choke block adopts the thin-walled borehole structure; The size in aperture depends on that hydraulic motor is stable when dredging operating mode flow and needed back pressure, its design pressure drop should be that the motors designs back pressure deducts the design pressure drop that all the other elements on the hydraulic motor oil return line comprise pipe.Accumulator adopts gasbag-type, and preliminary filling pressure confirms by 90% of its steady operation pressure, and the design maximum working pressure confirms by withstand voltage than low value 1.3～1.5 times in oil return filter and the oil cooler, but must not be above 4 times of preliminary filling pressure; 65% of the pressure store ability confirmed when the capacity of accumulator was recommended to press absorption liquid pressure motor in-line design maximum working pressure.Valve standard-sized sheet when the control oil channel design of cartridge valve should guarantee to dredge operating mode, the opening pressure of valve is recommended as 20%～35% of system's design maximum working pressure when reamer braking or inverted plate turner condition.The computational methods of above-mentioned design can find in general hydraulic Design handbook.
Claims (1)
1. the oil return line of a cutter suntion dredger reamer hydraulic motor; Cartridge valve, oil return filter, the oil cooler of connecting successively by the hydraulic motor oil-out; Oil cooler exports the flexible pipe of connecting successively, oil pump and hydraulic motor and constitutes circulation; Parallelly connected slippage pump and damping between oil pump inlet and the fuel tank is characterized in that the choke block of between cartridge valve and oil return filter, connecting, and before choke block parallelly connected accumulator; The control oil channel of cartridge valve is when dredging operating mode, and the control mouth of cartridge valve leads directly to fuel tank and maintaining valve standard-sized sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201674520U CN202099824U (en) | 2011-05-24 | 2011-05-24 | Return oil circuit of reamer hydraulic motor of cutter suction dredger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201674520U CN202099824U (en) | 2011-05-24 | 2011-05-24 | Return oil circuit of reamer hydraulic motor of cutter suction dredger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202099824U true CN202099824U (en) | 2012-01-04 |
Family
ID=45385843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201674520U Expired - Lifetime CN202099824U (en) | 2011-05-24 | 2011-05-24 | Return oil circuit of reamer hydraulic motor of cutter suction dredger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202099824U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895856A (en) * | 2015-04-07 | 2015-09-09 | 武汉船用机械有限责任公司 | A winch large-flow valve group and a winch large-flow hydraulic system |
| CN107202042A (en) * | 2017-07-28 | 2017-09-26 | 重集团大连工程技术有限公司 | A kind of fore pump constant pressure loop for cancelling overflow valve |
| CN107327447A (en) * | 2017-07-28 | 2017-11-07 | 重集团大连工程技术有限公司 | A kind of fore pump pressure limit protective loop for being applied to cancel overflow valve |
| CN109681481A (en) * | 2019-02-01 | 2019-04-26 | 徐州重型机械有限公司 | Oil supply system, hydraulic control system and engineering machinery |
| CN111677723A (en) * | 2020-05-08 | 2020-09-18 | 中国北方车辆研究所 | Heat dissipation loop suitable for high-power movable closed hydraulic system |
-
2011
- 2011-05-24 CN CN2011201674520U patent/CN202099824U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895856A (en) * | 2015-04-07 | 2015-09-09 | 武汉船用机械有限责任公司 | A winch large-flow valve group and a winch large-flow hydraulic system |
| CN107202042A (en) * | 2017-07-28 | 2017-09-26 | 重集团大连工程技术有限公司 | A kind of fore pump constant pressure loop for cancelling overflow valve |
| CN107327447A (en) * | 2017-07-28 | 2017-11-07 | 重集团大连工程技术有限公司 | A kind of fore pump pressure limit protective loop for being applied to cancel overflow valve |
| CN109681481A (en) * | 2019-02-01 | 2019-04-26 | 徐州重型机械有限公司 | Oil supply system, hydraulic control system and engineering machinery |
| CN111677723A (en) * | 2020-05-08 | 2020-09-18 | 中国北方车辆研究所 | Heat dissipation loop suitable for high-power movable closed hydraulic system |
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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: 20120104 |
|
| CX01 | Expiry of patent term |