CN2541651Y - Hydraulic appts. composed of constant-current network and switching hydraulic source - Google Patents
Hydraulic appts. composed of constant-current network and switching hydraulic source Download PDFInfo
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- CN2541651Y CN2541651Y CN 02217543 CN02217543U CN2541651Y CN 2541651 Y CN2541651 Y CN 2541651Y CN 02217543 CN02217543 CN 02217543 CN 02217543 U CN02217543 U CN 02217543U CN 2541651 Y CN2541651 Y CN 2541651Y
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- hydraulic
- switch
- hydraulic source
- switch hydraulic
- source
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Abstract
The utility model discloses a hydraulic device composed of a constant-current network and switch hydraulic sources. After the oil inlet ports and the oil return ports of a plurality of switch hydraulic sources are mutually connected in series, the oil inlet port of the first switch hydraulic source is connected with a P port at the output end of a quantitative hydraulic pump, the oil return port of the nth switch hydraulic source is connected with a T port at the input end of the quantitative hydraulic pump, and load oil ports of nth switch hydraulic sources are connected with the corresponding oil return port respectively through a corresponding executor. The output flow of each switch hydraulic source can be controlled by adjusting the duty ratio of the switch hydraulic source. The pressure difference between the two input ends of the switch hydraulic source is determined by the load driven by the output end. The output pressure of the hydraulic pump is equivalent to the sum of the pressure differences at the input end of each switch hydraulic source. The utility model omits a current limiting element and a controller of a secondary adjusting return circuit in a secondary adjusting hydraulic device of the traditional constant pressure network, and a volume-adjustable hydraulic pump and an accumulator are replaced by the quantitative hydraulic pump, so that the cost of the device is greatly reduced, and the overall efficiency of the hydraulic device is enhanced.
Description
Technical field
The utility model relates to the fluid pressure actuating device.
Background technique
Hydraulic transmission is divided into two big classes: throttling transmission device and volume transmission device.The former responds soon, can carry out advantages such as micrometeor adjusting, but efficient is low, can only be used for low power occasion.Therefore the volume transmission device has the high advantage of efficient, although speed of response is slower, can satisfy most of industrial application requirements, in becoming, the leading role of high-power hydraulic transmission.
Three phases has roughly been experienced in the development of volume transmission device: enclosed volume transmission device, power adaptive device and level pressure network secondary controlling device.
Enclosed volume transmission device does not have restriction loss at main line, and efficient is very high, and passes through the use of slippage pump, safety valve, oil-changing valve, can allow higher revolution speed, and the fuel tank volume is little, is easy to realize overload protection and oily temperature control.But this class device is not suitable for single pump multi executors device.
The power adaptive device is controlled by a power pump.Constant pressure by the maintenance load-sensitive valve is that principle is regulated the constant voltage pump delivery, reaches the purpose that the constant current amount is regulated.Not only avoid spill losses, and be applicable to the multi-load operating mode that drives in parallel.But this class device still has additional restriction loss at main pipe, and the delivery pressure of pump only adapts with maximum load, and under the operating mode of the bigger load parallel connection of a plurality of variations, efficient significantly reduces.
Level pressure network secondary controlling device is German scholar proposition at the beginning of the eighties, this device is made up of a plurality of variable hydraulic motor and accumulators that are connected in the level pressure network, does not have restriction loss on main line basically, can realize the recovery of braking energy, high energy utilization rate is arranged, and heating seldom.Its structure as shown in Figure 1.But this class matching requirements pump and motor all can be realized variable, and cost is higher, and still have current limiting element and controller on the loop, and a spot of restriction loss is arranged.
Summary of the invention
The utility model purpose is the hydraulic pressure installation that a kind of constant-current network of design and switch hydraulic source are formed, and replaces traditional level pressure network secondary regulation hydraulic device, significantly reduces installation cost, improves the overall efficiency of device.
The technical solution adopted in the utility model is as follows: it comprises n switch hydraulic source, quantitative hydraulic pump, and the filler opening of n switch hydraulic source is with after return opening is connected mutually, the oil-feed A of its first switch hydraulic source
1Be connected with the output terminal P mouth of quantitative hydraulic pump, and the return opening B of n switch hydraulic source
nBe connected the load hydraulic fluid port C of n switch hydraulic source with the input end T mouth of quantitative hydraulic pump
1～C
nRespectively through separately final controlling element b
1～b
nWith oil return B separately
1～B
nConnect.
The switch hydraulic source of said mutual series connection is that booster type switch hydraulic source series connection or the switch hydraulic source series connection of decompression and flow increasing type or booster type and decompression and flow increasing type switch hydraulic source combined serial form.
Wherein, the flow of constant-current network is exported by quantitative hydraulic pump, uses for each switch hydraulic source.Each switch hydraulic source all has high-speed switch valve, can be by its output flow is controlled in the adjusting of dutycycle under fixed switching frequency.The inlet port of each switch hydraulic source output terminal and output terminal and the input end of directly receiving quantitative hydraulic pump after oil drain out is connected mutually.Pressure reduction between switch hydraulic source two output terminals is by load that its output terminal drove decision, the delivery pressure of oil hydraulic pump then equal each switch hydraulic source two input end pressure reduction and.
The useful effect that the utlity model has is: because this hydraulic pressure installation has been cancelled the current limiting element and the controller of secondary regulating loop in traditional level pressure network secondary regulation hydraulic device, replaced volume adjustable hydraulic pump with quantitative hydraulic pump, replaced variable hydraulic motor with switch hydraulic source, significantly reduce installation cost, improve the overall efficiency of hydraulic pressure installation, reach optimum energy-saving effect.
Description of drawings
Fig. 1 is traditional level pressure network secondary regulation hydraulic apparatus structure schematic diagram;
Fig. 2 is the hydraulic device structure schematic diagram of being made up of constant-current network and switch hydraulic source of the present utility model;
Fig. 3 is the specific embodiment of the utility model schematic diagram.
Embodiment
Working procedure: quantitative hydraulic pump is fixed value (as 100l/min) to the flow of constant-current network output, delivery pressure then equal automatically each switch hydraulic source two input end pressure reduction and, can be protected by the built-in safety valve valve of metering pump during overload.
The overcurrent flow Q of each switch hydraulic source input end
iBe equal to the fuel supply flow rate of metering pump.If select for use the flow pattern switch hydraulic source falls, then its output flow Q
i' with dutycycle D
MiBe directly proportional:
Q′＝D
miQ
i
The pressure difference Δ p of two input ends
iBy induced pressure p
i' decision:
Δp
i＝D
mip
i′
If select up-flow type switch hydraulic source for use, its output flow Q then
i' with dutycycle D
MiBe directly proportional:
The pressure difference Δ p of two input ends
iBy induced pressure p
i' decision:
Subscript i in the formula represents i switch hydraulic source.
The delivery pressure of quantitative hydraulic pump is each switch hydraulic source output pressure differential deltap p
iAnd:
Can get thus, because the input flow rate of each switch hydraulic source is a definite value, when required output flow increases, corresponding dutycycle should change, brought the pressure difference between switch hydraulic source two input ends to increase thus, quantitative hydraulic pump will be exported bigger pressure to guarantee the normal operation of device, reach optimum energy-saving effect.
According to the difference of switch hydraulic source function, can be divided into and fall two kinds of flow pattern switch hydraulic source and up-flow type switch hydraulic sources, the booster type switch hydraulic source that falls flow pattern and claimant application is identical; The decompression and flow increasing type switch hydraulic source of up-flow type and claimant's application is identical.Can be October 10 calendar year 2001 referring to the applying date, application number be 01264886.8, and name is called " hydraulic pressure installation that is made of hydraulic bus and switch hydraulic source ".
Specific embodiment: in large-scale engineering machineries such as hydraulic shovel, can adopt the quantitative hydraulic pump fuel feeding of one group of big flow, the a plurality of switch hydraulic sources of tandem drive, realize the driving of its traveller, swirl gear, actuator, dipper mechanism and shovel mechanism respectively, guarantee the harmony of each actuator motions, and reach optimum working efficiency.
After among Fig. 3 being the output terminal P mouth serial connection booster type switch hydraulic source and decompression and flow increasing type switch hydraulic source of quantitative hydraulic pump 1, connect the output terminal T mouth of quantitative hydraulic pump 1, guarantee the harmony of actuator 2 and 3 motions of dipper mechanism, and reach optimum working efficiency.
Claims (2)
1. the hydraulic pressure installation of forming by constant-current network and switch hydraulic source, it is characterized in that: it comprises n switch hydraulic source, quantitative hydraulic pump (2), the filler opening of n switch hydraulic source is with after return opening is connected mutually, its first switch hydraulic source (a
1) oil-feed A
1Be connected with the output terminal P mouth of quantitative hydraulic pump (1), and n switch hydraulic source (a
n) return opening B
nBe connected the load hydraulic fluid port C1～C of n switch hydraulic source with the input end T mouth of quantitative hydraulic pump
nRespectively through separately final controlling element b
1～b
nWith oil return B separately
1～B
nConnect.
2. the hydraulic pressure installation of being made up of constant-current network and switch hydraulic source according to claim 1 is characterized in that: the switch hydraulic source of said mutual series connection is that booster type switch hydraulic source series connection or the switch hydraulic source series connection of decompression and flow increasing type or booster type and decompression and flow increasing type switch hydraulic source combined serial form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217543 CN2541651Y (en) | 2002-05-17 | 2002-05-17 | Hydraulic appts. composed of constant-current network and switching hydraulic source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217543 CN2541651Y (en) | 2002-05-17 | 2002-05-17 | Hydraulic appts. composed of constant-current network and switching hydraulic source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2541651Y true CN2541651Y (en) | 2003-03-26 |
Family
ID=33696336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02217543 Expired - Fee Related CN2541651Y (en) | 2002-05-17 | 2002-05-17 | Hydraulic appts. composed of constant-current network and switching hydraulic source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2541651Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533859A (en) * | 2014-11-14 | 2015-04-22 | 燕山大学 | Hydraulic system design method based on multisource network |
-
2002
- 2002-05-17 CN CN 02217543 patent/CN2541651Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533859A (en) * | 2014-11-14 | 2015-04-22 | 燕山大学 | Hydraulic system design method based on multisource network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |