CN204851831U - Closed hydraulic system and including this closed hydraulic system's machine - Google Patents
Closed hydraulic system and including this closed hydraulic system's machine Download PDFInfo
- Publication number
- CN204851831U CN204851831U CN201520628548.0U CN201520628548U CN204851831U CN 204851831 U CN204851831 U CN 204851831U CN 201520628548 U CN201520628548 U CN 201520628548U CN 204851831 U CN204851831 U CN 204851831U
- Authority
- CN
- China
- Prior art keywords
- pump
- motor
- hydraulic system
- oil
- fluid
- Prior art date
- 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.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to a closed hydraulic system, including working barrel, motor, hydraulic tank and slippage pump, the output hydraulic fluid port of working barrel with the oil inlet fluid coupling of motor, the oil inlet of working barrel with the oil return opening fluid coupling of motor, the inlet port and the hydraulic tank fluid coupling of slippage pump, the oil -out of slippage pump with the benefit hydraulic fluid port fluid coupling of working barrel, its characterized in that, the inlet port of slippage pump still with oil pipe way fluid coupling is let out to the casing of pump and motor. This closed hydraulic system lets out the return oil pressure that oil pipe way oil absorption mode of while reduces working barrel and motor casing with the slippage pump from hydraulic tank and pump, motor casing. The utility model discloses still relate to the machine including this closed hydraulic system.
Description
Technical field
The utility model relates to a kind of closed type hydraulic system, and a kind of machine comprising this closed type hydraulic system.
Background technique
Such as the machine of loader, excavator, bulldozer, grader or other type jumbo and so on is applied in every field more and more widely, such as communications and transportation, construction, mining industry, agricultural, construction industry etc.In these machines, usual use drives executive component (such as oil hydraulic cylinder, motor) to carry out various task from the hydraulic fluid of the one or more pumps on machine, and described task comprises machine walking, moved arm lifting and decline, scraper bowl and excavates and discharging etc. of tumbling.
The hydraulic system of this kind of machine generally includes open type hydraulic system and closed type hydraulic system, and wherein, in closed type hydraulic system, system oil return is not hydraulic return fuel tank, but turns back to the filler opening of oil hydraulic pump.The energy loss of closed type hydraulic system is less, and specific power is high, volume is little, and easy mounting arrangements is mainly used in the walking of machine, swirl gear.
Closed type hydraulic system is as a kind of closed oil hydraulic circuit, there is internal hydraulic pressure element (such as oil hydraulic pump and oil hydraulic motor) generation leak and cause the problem of hydraulic oil deficiency in closed cycle loop, therefore needing, slippage pump is set and carries out repairing from hydraulic oil container extraction hydraulic oil.On the other hand, the oil that the pump in system and motor leak enters pump and motor casing, and the oil in pump and motor casing will by drain line hydraulic return fuel tank.The pressure that can bear due to pump and motor casing is lower, therefore require that the return oil pressure in drain line is enough little, otherwise due to pump and motor casing pressure high and cause inputing or outputing axle outside framework oil seal place and leakage of oil problem occurs cause pump, motor early failue, reduce the working life of pump and motor.
In existing machine, in order to ensure that in equipment running process, oil temperature in hydraulic system maintains in rational scope, reduce hydraulic oil container volume simultaneously, usually on hydraulic system return line, cooler is installed, hydraulic oil is cooled, in closed type hydraulic system, the hydraulic oil cooled is pump, motor casing oil return.But cooler and longer return line likely cause the housing back pressure of pump, motor to increase.
The utility model is intended to solve the problem and/or other problem of the prior art.
Summary of the invention
On the one hand, the utility model relates to a kind of closed type hydraulic system, comprise working pump, motor, hydraulic oil container and slippage pump, the output oil port of described working pump is connected with the filler opening fluid of described motor, the filler opening of described working pump is connected with the return opening fluid of described motor, the inlet port of described slippage pump is connected with hydraulic oil container fluid, the oil outlet of described slippage pump is connected with the repairing mouth fluid of described working pump, it is characterized in that, the inlet port of described slippage pump is also connected with the case drain pipeline fluid of described pump and motor.
On the other hand, the utility model relates to a kind of machine comprising this closed type hydraulic system.
Accompanying drawing explanation
In more detail the utility model is described below with reference to schematic accompanying drawing.Accompanying drawing and corresponding embodiment are only for illustrative purposes, but not for limiting the utility model.In the accompanying drawings:
Fig. 1 is the schematic diagram of the simplification according to closed type hydraulic system of the present utility model.
Embodiment
Describe in detail below with reference to accompanying drawings according to closed type hydraulic system 100 of the present utility model.Closed type hydraulic system 100 illustrated in the accompanying drawings can be used for the traveller of the machine that wherein hydraulic component is arranged with longer distance.But should be understood that, the utility model not by the restriction of this specific embodiment, but contains all other equivalents comprising its design concept.
As shown in Figure 1, closed type hydraulic system 100 comprises working pump 12, the left motor 13 be connected with the output oil port fluid of working pump 12 by suitable valve element and right motor 14, and hydraulic oil container 20.In the illustrated embodiment, working pump 12 can be axial piston pump, and left motor 13 and right motor 14 can be radial or axial piston motor.The output oil port of working pump 12 is connected with the filler opening fluid of left motor 13 and right motor 14, and the filler opening of working pump 12 is connected with the return opening fluid of left motor 13 and right motor 14, thus forms closed hydraulic loop.
Hydraulic system 100 also comprises slippage pump 11, and the oil outlet of slippage pump 11 is connected with the repairing mouth fluid of working pump 12, for closed type hydraulic system replenisher hydraulic fluid, as hydraulic oil.
At machine run duration, the Leakage Energy of working pump and motor will enter the housing of working pump and motor.As shown in Figure 1, Leakage Energy in left motor 13 housing enters cooling unit in-line 3 by the Leakage Energy in left motor casing drain line 1, right motor 14 housing by right motor casing drain line 2, Leakage Energy in working pump 12 housing enters cooling unit in-line 3 via pump case drain line 6, and then the Leakage Energy in each drain line is pooled to cooling unit 4 to cool.In the illustrated embodiment, cooling unit can be radiator 4.The oil outlet of radiator 4 is connected to filter 8 by radiator return line 5, to filter the Leakage Energy through cooling.
The oil outlet of filter 8 is connected to the inlet port of slippage pump 11 by slippage pump inlet line 9.In addition, the inlet port of slippage pump 11 is also connected with hydraulic oil container 20 fluid by slippage pump inlet line 10, to extract hydraulic fluid from hydraulic oil container.
Visible, in closed type hydraulic system of the present utility model, slippage pump 11 respectively by pipeline 9 and 10 simultaneously from filter 8 and hydraulic oil container 20 oil suction.Due to the negative pressure that slippage pump 11 produces from filter 8 oil suction, thus effectively can reduce the return oil pressure of the case drain of working pump 12 and motor 13,14.
According in closed type hydraulic system of the present utility model, the return oil pressure of working pump and motor casing is reduced from hydraulic oil container with through supercooling and the working pump of filtration, the mode of motor casing draining oil suction simultaneously dexterously with slippage pump, reduce the leakage of oil Problem of Failure that working pump and motor shaft end sealing place cause because self housing pressure is high thus, extend the working life of working pump and motor, the flow area of housing return line can be reduced simultaneously, and then reduce the arrangement space of hydraulic pipe line.
Grader auxiliary drive is specially adapted to according to closed type hydraulic system of the present utility model.Be understandable that, in appropriate circumstances, this closed type hydraulic system also may be used for other machines.
By specific embodiment, closed type hydraulic system of the present utility model is described above.To those skilled in the art, it is evident that and can make multiple change and distortion when not departing from invention thought of the present utility model to closed type hydraulic system of the present utility model.Specification and example are only regarded as exemplary, and real scope is represented by claims and their equivalent.
Claims (6)
1. a closed type hydraulic system, comprise working pump, motor, hydraulic oil container and slippage pump, the output oil port of described working pump is connected with the filler opening fluid of described motor, the filler opening of described working pump is connected with the return opening fluid of described motor, the inlet port of described slippage pump is connected with hydraulic oil container fluid, the oil outlet of described slippage pump is connected with the repairing mouth fluid of described working pump, it is characterized in that, the inlet port of described slippage pump is also connected with the case drain pipeline fluid of described working pump and motor.
2. closed type hydraulic system according to claim 1, is characterized in that, is provided with cooling unit in the case drain pipeline of described pump and motor.
3. closed type hydraulic system according to claim 2, is characterized in that, described cooling unit is radiator.
4. the closed type hydraulic system according to any one of claim 1-3, is characterized in that, is provided with filter in the case drain pipeline of described pump and motor.
5. a machine, comprises the closed type hydraulic system according to any one of claim 1-4.
6. machine according to claim 5, is characterized in that, described machine is grader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628548.0U CN204851831U (en) | 2015-08-20 | 2015-08-20 | Closed hydraulic system and including this closed hydraulic system's machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628548.0U CN204851831U (en) | 2015-08-20 | 2015-08-20 | Closed hydraulic system and including this closed hydraulic system's machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204851831U true CN204851831U (en) | 2015-12-09 |
Family
ID=54742384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520628548.0U Active CN204851831U (en) | 2015-08-20 | 2015-08-20 | Closed hydraulic system and including this closed hydraulic system's machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204851831U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854570A (en) * | 2019-01-07 | 2019-06-07 | 苏州瑞奇安机电科技有限公司 | A kind of oil suction decompressor and oil suction depressurized system |
-
2015
- 2015-08-20 CN CN201520628548.0U patent/CN204851831U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854570A (en) * | 2019-01-07 | 2019-06-07 | 苏州瑞奇安机电科技有限公司 | A kind of oil suction decompressor and oil suction depressurized system |
| CN109854570B (en) * | 2019-01-07 | 2023-09-26 | 苏州瑞奇安机电科技有限公司 | Oil absorption pressure reducing device and oil absorption pressure reducing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206035914U (en) | Four jar synchronous hydraulic system of automobile elevator | |
| CN204851831U (en) | Closed hydraulic system and including this closed hydraulic system's machine | |
| CN201836149U (en) | Hydraulic closed loop system | |
| CN206169373U (en) | A unclamping cylinder that cools in being used for milling machine electricity main shaft cutter | |
| CN203548173U (en) | Oil replenishing and flushing device of hydraulic variable displacement piston pump | |
| CN105114380A (en) | Synchronous-control hydraulic station of oil cylinders | |
| CN202789859U (en) | Hydraulic energy-saving temperature controlling system for loader working equipment | |
| CN211009386U (en) | Open or semi-closed hydraulic circuit filtration system | |
| CN204226002U (en) | A kind of engine torque extracting machine with built-in oil leab | |
| CN204755439U (en) | Fracturing pump hydraulic system and fracturing unit truck | |
| CN103486019B (en) | Combination brake switch and proporting | |
| CN203463278U (en) | Combination valve | |
| CN204098984U (en) | Integrated oil lubricating module assembly | |
| CN204098986U (en) | Integrated type oil lubricating module assembly | |
| CN105370564A (en) | Gear pump front cover with overflow protecting function | |
| CN202577439U (en) | Secondary backpressure system of hydraulic excavator | |
| CN204755456U (en) | Hydraulic motor pressure relief device | |
| CN207378465U (en) | Rocker arm of coal mining machine lubricant passage way | |
| CN201857256U (en) | Fast oiling system for oil tank of development machine | |
| CN207315754U (en) | A kind of control pressurer system of external enclosed pump | |
| CN212838653U (en) | Negative pressure of closed pump prevents bearing seal leakage device | |
| CN201016338Y (en) | Oil pump | |
| CN204610432U (en) | A kind of oil circuit protective gear for milling digging machine | |
| CN105179103B (en) | The chain gear chamber cover plate and engine of engine | |
| CN208364536U (en) | Compressed air type hydraulic oil cooling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |