CN103629094A - Pump device - Google Patents
Pump device Download PDFInfo
- Publication number
- CN103629094A CN103629094A CN201210375263.1A CN201210375263A CN103629094A CN 103629094 A CN103629094 A CN 103629094A CN 201210375263 A CN201210375263 A CN 201210375263A CN 103629094 A CN103629094 A CN 103629094A
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- Prior art keywords
- pump
- rotating speed
- unit
- metering pump
- drive unit
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- Control Of Positive-Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a pump device. Preferably, the pump device is a constant pressure system and comprises a plurality of fixed displacement pumps in parallel, and the fixed displacement pumps are all driven by a rotating speed changeable driving device. Each fixed displacement pump is provided with an auxiliary working pipeline, a distribution valve is arranged in each auxiliary working pipeline, and conveying volume flow of the auxiliary fixed displacement pumps can be led out from grooves through the distribution valves. The working pipelines are combined in a public high-pressure pipeline of the pump device. According to the pump device, the distribution valves, used for removing activation or invaliding connection or used for carrying out activating or connecting, of the belonging fixed displacement pumps can be switched on or switched off or operated by depending on respective threshold rotating speed of the speed changeable driving device. Preferably, the operation is achieved through a regulating loop. Therefore, the pump device can be driven in a rotating speed changeable mode in a wide rotating speed band to a large extent.
Description
Technical field
The present invention relates to a kind of pump-unit and for the method for bootup window.
Background technique
The shortcoming of this pump-unit is, it is for supplying with two pressure spaces that are oppositely arranged to load.
Summary of the invention
Task of the present invention is on the other hand, and a kind of pump-unit is provided, and it can be supplied with and use for a plurality of and different loads.
This task by have claim 1 feature pump-unit and by solving according to the method for the bootup window of claim 9 or 10.
Pump-unit of the present invention has the metering pump of a plurality of parallel connections, and they are driven by the drive unit of a variable speed jointly.Each metering pump has the service line of subordinate, and a distributing valve is set respectively in it, and the delivered volume that can derive the metering pump of subordinate to liquid bath by it flows.Service line connects in public high voltage interface of pump-unit or the public high pressure line of the bar of injection pump device.According to the present invention, can depend on the threshold value rotating speed of the drive unit of variable speed, switch or operation activate or outstanding effect is connected or for the distributing valve of the metering pump under activating or connecting for removing.Provide thus and can take the pump-unit that high flexibility supplies with as a plurality of different loads.
Favourable structure in addition of the present invention illustrates in the dependent claims.
Particularly preferably pump-unit is constant-voltage system, in its high pressure line, under the different rotating speed of the drive unit of variable speed, also can produce and keep constant working pressure.This uses regulating loop to realize, and it has pressure transducer, by this pressure transducer, can determine the induced pressure in public high pressure line.Can the connected distributing valve of switch by this regulating loop.Thus can be by this pump-unit with constant power or torque with the load of variable speed operation hydraulic pressure.
Preferably the drive unit of variable speed is motor, and wherein, the rotating speed of motor can be adjusted by regulating loop by frequency variator.
In this part thing, can in operation with closed ring (closed regulating circuit), provide a speed probe on motor, it is connected with regulating circuit.
Or can move in open loop and in (regulating circuit of unlatching), in frequency variator, build equivalent circuit or rotating speed model according to a low modification of cost.
Preferably metering pump uses Coupler to be coupled each other and/or with the drive unit of variable speed by axle.The single metering pump of Static adjust also so entirely.
When metering pump has different specified delivered volume, produce the different combinatory possibility of metering pump, make it possible to have the rotating speed band of further restriction drive unit.Here can design the metering pump with minimum specified delivered volume keeps operation with the leakage of the load that compensates pump-unit of the present invention or supply with thus for the zero stroke operation of load and/or for pressure.
When distributing valve is connected with liquid Cao by a public liquid bath pipeline that returns to guiding, can in this liquid bath pipeline, cooler and/or filter be set.
A kind of preferred expansion Bonding pressure storage on public high pressure line at pump-unit of the present invention.
Here particularly preferably be an adjustable throttling one-way valve is set between pressure reservoir and high pressure line.It can be as damping member effect together with pressure reservoir.
Of the present invention have step for improving according to the method for the volume flow of the public high pressure line of the pump-unit one of the claims Suo Shu:
-special the rotating speed that improves constantly the drive unit of variable speed;
-distributing valve by belonging to metering pump by-preferably adjustable-threshold value rotating speed activates or connects one of them metering pump; With
-special the rotating speed that improves constantly the drive unit of variable speed.
Realize thus a kind of method for process pump device, the drive unit of its variable speed can move to a great extent on wide rotating speed band.
In the step of centre " activating or connect one of them metering pump " can-special jumpily-reduce the rotating speed of the device of variable speed.Can compensate thus the volume flow that the jump type in theory in high pressure line rises.
Correspondingly, of the present invention have step for reducing according to the method for the volume flow of the public high pressure line of the pump-unit one of the claims Suo Shu:
-special the rotating speed that reduces constantly the drive unit of variable speed;
-distributing valve by belonging to metering pump by-preferably adjustable-threshold value rotating speed is removed and is activated or one of them metering pump of invalid connection; With
-special the rotating speed that reduces constantly the drive unit of variable speed.
Realize thus a kind of method for process pump device, the drive unit of its variable speed can move to a great extent on wide rotating speed band.
In the step of " remove activate or one of them metering pump of invalid connection " of centre can-special jumpily-improve the rotating speed of the device of variable speed.Can compensate thus the volume flow that the jump type in theory in high pressure line reduces.
In two kinds of methods, particularly preferably, for example, while activating or connecting one of them metering pump for example, with threshold value rotating speed (500 revs/min) lower when higher threshold value rotating speed (1500 revs/min), remove and activate or the identical metering pump of invalid connection.Produce thus the rotating speed band with wide hysteresis.
Accompanying drawing explanation
Describe with reference to the accompanying drawings one embodiment of the present of invention below in detail.In accompanying drawing:
Fig. 1 is illustrated in the embodiment of the pump-unit of the present invention in the situation of maximum volume stream demand of load,
Fig. 2 is illustrated in zero stroke operation or pressure keeps operating according to the embodiment of Fig. 1.
Embodiment
Fig. 1 is illustrated in one in the situation that the maximum volume of the load 1 connecting on pump-unit flows embodiment of pump-unit of the present invention of demand, and it is constructed as constant-voltage system.This pump-unit has three metering pump P1, P2, P3 in parallel.They arrange in open loop, and have respectively service line 2,4,6.Service line 2,4,6 is injected a public high pressure line 8, by it, gives load 1 supply pump pressure.
Three metering pumps can have different specified delivered volume, below this option, distinguish large metering pump P3, middle metering pump P2 and little metering pump P1.Little metering pump P1 is that zero stroke operation or pressure keep driving design.
Distributing valve 10,12,14 is set respectively in service line 2,4,6.Each distributing valve 10,12,14 is as 3/2 valve constitution, and has two switching position, thereby wherein by the switching position each metering pump P1, P2, the P3 representing in Fig. 1, is connected with load 1 with high pressure line 8.At each second switch position of distributing valve 10,12,14 relevant metering pump P1, P2, P3, by ballast line 16,18,20 separately, to liquid bath T, unload.Ballast line 16,18,20 is injected a public connecting line 21 for this reason, in the latter's injection liquid barrel line 22.Liquid bath pipeline 22 is connected load 1 with liquid bath T.
Arrange one by the one-way valve 24 of spring pretension connecting line 21 is interior, thereby its direction of opening is orientated towards liquid bath T towards liquid bath pipeline 22 from ballast line 16,18,20.
In one section of the liquid bath pipeline 22 arranging, arrange one by the one-way valve 26 of spring pre-tightening between load 1 and the decanting point of connecting line 21, its direction of opening is orientated towards liquid bath T from load 1.
In one section of the liquid bath pipeline 22 arranging, a filter 28 and a cooler 30 are set between the decanting point of connecting line 21 and liquid bath T.By them, the pressure medium not only refluxing from load 1 but also the pressure medium refluxing towards liquid bath T by their ballast line 16,18,20 from pump P1, P2, P3 are all filtered with cooling.
On high pressure line 8, by controlling pipeline 32, connect a pressure transducer 34, it is connected to pump-unit control unit 38 of the present invention by signaling line 36.Each distributing valve 10,12,14 is moved or switch by control unit 38 by an electric lead 54,56,58.In addition control unit 38 regulates the rotating speed of motor 40 by (end represents an in detail) frequency variator, and the latter is connected with large proportional valve P3 by live axle 42.Large proportional valve P3 is coupled with middle proportional valve P2 by coupling shaft 44, and it is coupled with little proportional valve P1 by coupling shaft 46.A coupling device 48,50,52 is respectively provided in axle 42,44,46, by them, can be separated from each other or de-coupling equipment 40, P1, P2, P3.
These metering pumps needn't connect by coupling device, and they also can be connected to each other directly and form multistage pump.
On high pressure line 8, pass through throttling one-way valve 60 Bonding pressure storagies 62.Thereby pressure reservoir 62 can be passed through larger unlatching cross section to high pressure line 8 to load 1 delivery pressure medium, and the unlatching cross section of effect is less and adjustable during stuffing pressure storage 62.
When load 1 needs maximum volume flow, distributing valve 10,12,14 is connected on by control unit 38 switching position representing in Fig. 1, makes the delivered volume stream of all three metering pump P1, P2, P3 be transported to load 1 by public high pressure line 8.
Fig. 2 is illustrated in zero stroke operation or pressure keeps in service according to the embodiment of the pump-unit of the present invention of Fig. 1.Here and two distributing valves 12,14 of large metering pump P2, P3 by control unit 38, change like this, thereby make their delivered volume separately flow the ballast line 18,20 by separately and towards liquid bath T, transport towards liquid bath pipeline 22 by connecting line 21.
In a kind of special design of above-described embodiment, motor 40 can drive with the rotating speed of 3000 revs/min all metering pump P1, P2, P3 under the running state shown in Fig. 1, and rotating speed is 200 revs/min under the running state shown in Fig. 2.The (not shown) method of operation below between two kinds of running statees that represent at Fig. 1 and 2 is possible.
-large metering pump P3 and middle metering pump P2 carry to load 1;
-large metering pump P3 and little metering pump P1 carry to load 1;
-middle metering pump P2 and little metering pump P1 carry to load 1;
-only large metering pump P3 carries to load 1; With
-only middle metering pump P2 carries to load 1.
Thereby public delivered volume stream can change towards load 1 in high pressure line 8 " wide " thus.
The following describes the second embodiment of pump-unit of the present invention: in zero stroke 10ccm pump in order under the constant voltage at 100 bar with 2 liters/min of leakage balances that keep loads 1.Here the rotating speed of motor 40 is about 200 revs/min.Demand by 10ccm pump and " 100 bar constant voltage " does not require motor 40 to have the torque of 15.9Nm during considering efficiency.
In the situation that load 1 is required to the maximum volume stream of 90 liters/min, for this reason further will be from conversion 20ccm pump the rotating speed of 1500 revs/min for example.Therefore when the rotating speed of 1500 revs/min, carry the volume flow of 45 liters/min.Thereby motor 40 accelerates until 3000 revs/min of volume flows that reach needed 90 liters/min.To 1500 revs/min, requiring the torque of motor 40 is 15.9Nm, so this can accelerate very fast.When passing through at 1500 revs/min, changing-over distributing valve is connected after 20ccm pump, and the torque that requires motor 40 is 47.7Nm.Switching wave is rotating speed, and it is from frequency variator, and the latter has the current actual speed of motor 40 at any time.Motor 40 continues to accelerate until 3000 revs/min as far as possible in overload region.It is possible using motor 40 and this overload of frequency variator.
In deferring procedure, need only two constant pressure valve P1 and P2 and in system, activate just conveying, until again reach a threshold value rotating speed.This threshold value rotating speed needs not to be and connects the identical rotating speed (how being significantly less than for example 500 revs/min) of process for distributing valve.By two constant pressure valve P1 and P2, participate in deferring procedure, on motor 40, produce a higher countertorque, so it is than being slowed down quickly when only a metering pump shows countertorque.
Disclose a kind of pump-unit, preferably as constant-voltage system, there is the metering pump of a plurality of parallel connections, they jointly by a variable speed driving dress mouse drive.Each metering pump has the service line of subordinate, and a distributing valve is set respectively in it, and the delivered volume that can derive the metering pump of subordinate to liquid bath by it flows.In a public high pressure line of service line injection pump device.According to the present invention, can depend on the corresponding threshold value rotating speed of the drive unit of variable speed, switch or operation distributing valve activate or invalid connection or for the metering pump under activating or connecting for removing.This preferably realizes by a regulating loop.Providing thus can pump-unit, moves to a great extent in wide rotating speed band its variable speed.
Reference numerals list
1 load
2,4,6 service line
8 high pressure lines
10,12,14 distributing valves
16,18,20 ballast line
21 connecting lines
22 liquid bath pipelines
24,26 one-way valves
28 filters
30 coolers
32 control pipeline
34 pressure transducers
36 signaling lines
38 control units
40 motor
42 live axles
44,46 coupling shafts
48,50,52 Couplers
54,56,58 electric leads
60 throttling one-way valves
62 pressure reservoir
The little constant pressure valve of P1
Constant pressure valve in P2
The large constant pressure valve of P3
T liquid bath
Claims (11)
1. there are a plurality of metering pump (P1, P2, P3) pump-unit, they are driven by the drive unit (40) of a variable speed jointly, each metering pump (P1 wherein, P2, P3) there is service line (2, 4, 6), distributing valve (10 is set respectively in it, 12, 14), by this distributing valve, can derive to liquid bath (T) metering pump (P1 of subordinate, P2, P3) delivered volume stream, wherein wall scroll service line (2, 4, 6) be connected on public high voltage interface or inject in public high pressure line (8), it is characterized in that, the threshold value rotating speed conversion assignments valve (10 that can depend on the drive unit (40) of variable speed, 12, 14).
2. pump-unit according to claim 1, wherein, when the different rotating speed of the drive unit of the inherent variable speed of high pressure line (8), can produce constant working pressure, wherein pump-unit has regulating loop (34,38), the latter has pressure transducer (34), by it, can determine the induced pressure in high pressure line (8), wherein, can conversion assignments valve (10,12,14) by regulating loop (34,38).
3. pump-unit according to claim 2, wherein, the drive unit of variable speed is motor (40), and it is connected with regulating loop (34,38), and the rotating speed of motor (40) can be adjusted by regulating loop (34,38) by frequency variator.
4. according to the pump-unit one of the claims Suo Shu, wherein, metering pump (P1, P2, P3) uses Coupler (48,50,52) to be coupled each other or with the drive unit (40) of variable speed by axle (42,44,46).
5. according to the pump-unit one of the claims Suo Shu, wherein, metering pump (P1, P2, P3) has different specified delivered volume.
6. according to the pump-unit one of the claims Suo Shu, wherein, distributing valve (10,12,14) is connected with liquid bath (T) by public liquid bath pipeline (22), and cooler (30) or filter (28) are set in liquid bath pipeline (22).
7. according to the pump-unit one of the claims Suo Shu, wherein, at high pressure line (8), go up Bonding pressure storage (62).
8. pump-unit according to claim 7 arranges adjustable throttling one-way valve (60) between pressure reservoir (62) and high pressure line (8).
9. for improving according to the method for the volume flow of the high pressure line of the pump-unit one of the claims Suo Shu (8), there is step:
The rotating speed of the drive unit (40) of-raising variable speed;
-by belonging to the distributing valve (10,12,14) of metering pump (P1, P2, P3), by threshold value rotating speed, activate or connect one of them metering pump (P1, P2, P3); With
The rotating speed of the drive unit (40) of-raising variable speed.
10. for reducing, according to the method for the volume flow of the high pressure line of the pump-unit one of claim 1 to 8 Suo Shu (8), there is step:
-reduce the rotating speed of the drive unit (40) of variable speed;
-by belonging to the distributing valve (10,12,14) of metering pump (P1, P2, P3), by threshold value rotating speed, remove and activate or one of them metering pump of invalid connection (P1, P2, P3); With
-reduce the rotating speed of the drive unit (40) of variable speed.
11. according to the method described in claim 9 or 10, wherein, when first threshold rotating speed, activate or connect one of them metering pump (P1, P2) and activate or the identical metering pump (P1, P2) of invalid connection with removing when the Second Threshold rotating speed, wherein first threshold rotating speed is greater than Second Threshold rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375263.1A CN103629094B (en) | 2012-08-24 | 2012-08-24 | Pump installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210375263.1A CN103629094B (en) | 2012-08-24 | 2012-08-24 | Pump installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103629094A true CN103629094A (en) | 2014-03-12 |
| CN103629094B CN103629094B (en) | 2016-12-21 |
Family
ID=50210473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210375263.1A Expired - Fee Related CN103629094B (en) | 2012-08-24 | 2012-08-24 | Pump installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103629094B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3727633A1 (en) * | 1987-08-19 | 1989-03-02 | Manfred Rattunde | Cone pulley transmission with controlled quantity of pressure medium |
| US4848790A (en) * | 1987-04-06 | 1989-07-18 | Nissan Motor Company, Limited | Hydraulic pressure supply system variable of pressure supply rate depending upon driving condition of automotive vehicle |
| EP1065386A2 (en) * | 1999-07-02 | 2001-01-03 | Still Gmbh | Hydraulic circuit for a materials handling vehicle |
| CN1659380A (en) * | 2002-06-11 | 2005-08-24 | 大金工业株式会社 | Pump unit |
| CN101929492A (en) * | 2009-06-20 | 2010-12-29 | 罗伯特.博世有限公司 | Be used to control the device of equipment with oil hydraulic circuit |
-
2012
- 2012-08-24 CN CN201210375263.1A patent/CN103629094B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4848790A (en) * | 1987-04-06 | 1989-07-18 | Nissan Motor Company, Limited | Hydraulic pressure supply system variable of pressure supply rate depending upon driving condition of automotive vehicle |
| DE3727633A1 (en) * | 1987-08-19 | 1989-03-02 | Manfred Rattunde | Cone pulley transmission with controlled quantity of pressure medium |
| EP1065386A2 (en) * | 1999-07-02 | 2001-01-03 | Still Gmbh | Hydraulic circuit for a materials handling vehicle |
| CN1659380A (en) * | 2002-06-11 | 2005-08-24 | 大金工业株式会社 | Pump unit |
| CN101929492A (en) * | 2009-06-20 | 2010-12-29 | 罗伯特.博世有限公司 | Be used to control the device of equipment with oil hydraulic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103629094B (en) | 2016-12-21 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |