JPS58119982A - Regulator for variable-capacity type pump - Google Patents
Regulator for variable-capacity type pumpInfo
- Publication number
- JPS58119982A JPS58119982A JP57234866A JP23486682A JPS58119982A JP S58119982 A JPS58119982 A JP S58119982A JP 57234866 A JP57234866 A JP 57234866A JP 23486682 A JP23486682 A JP 23486682A JP S58119982 A JPS58119982 A JP S58119982A
- Authority
- JP
- Japan
- Prior art keywords
- displacement pump
- pump
- load
- variable displacement
- pressure
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims description 53
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発ＢＡｔ）分野〕 □
本発明は、負荷への送給量を調節する九め圧力調節ａｔ
たは流量調節器によって作動ｌｉ＃を調節できる形式の
可変容量形ポンプの調節装置に関する０
〔従来技術〕
圧力調節器の圧力が、バネによって設定される運転圧に
達しない＠り、可変容量形ポンプの作動部材は系の圧力
を受けるので、可変容量形ポンプは、最大押し除は容積
に調節される。圧力が設定値に達すると、ピストンが圧
力調節器内を移動し、その結果、可変容量形ポンプの作
動部材は低圧を受ける。この場合、可変容量形ポンプの
固定子リングは、ゼロ位置の方向へ移動することになり
、送給量は、設足せる運転圧が保持されるような数値に
調節される。[Detailed description of the invention] [Bat) field] □ The present invention is a ninth pressure adjustment at which adjusts the amount of feed to a load.
[Prior art] When the pressure of a pressure regulator does not reach the operating pressure set by a spring, a variable displacement pump is used. In variable displacement pumps, the maximum displacement is adjusted to the volume because the actuating members of the pump are subject to system pressure. When the pressure reaches the set value, the piston moves within the pressure regulator, so that the actuating member of the variable displacement pump experiences a low pressure. In this case, the stator ring of the variable displacement pump will move in the direction of the zero position, and the feed rate will be adjusted to a value such that the available operating pressure is maintained.
負荷に１って液体が引出されず、従って、圧力が最大値
に達すると、可変容量形ポンプは、送給量ゼ纂に調節さ
れる。これは、運転圧が保持され、漏れ油量のみが補給
される、いわゆる、ゼロストローク範囲である。可変容
量形ポンプは、ゼロストローク位置においても作動する
が、所要の駆動電力が比較的大きい。When no liquid is drawn off under load and the pressure has therefore reached a maximum value, the variable displacement pump is adjusted to the delivery peak. This is the so-called zero stroke range in which the operating pressure is maintained and only the amount of leaked oil is replenished. Variable displacement pumps operate in a zero stroke position, but require relatively high drive power.
本発明の目的は、負荷への送給量を極めて少い蓋に調節
した場合、可変容量形ポンプを含む油圧系の消費電力を
減少することにある。An object of the present invention is to reduce the power consumption of a hydraulic system including a variable displacement pump when the amount of feed to a load is adjusted to an extremely small amount.
［発明の構成利点］
この目的は、冒頭に述べた種類の調節装置において、本
発明にもとづき、小容量の定容量形ポンプを可変容量形
ポンプに並＾に設け、送給量が所定値を下回′ｌ）た場
合、可変容量形ポンプを負荷から切離してタンクにＷ！
絖し、同時に、定容量影ポンプを負荷に接続して運転圧
を保持するととによって、達成される。[Configuration Advantages of the Invention] The object is to provide, according to the invention, a small-capacity constant-displacement pump in parallel with a variable-displacement pump in a regulating device of the type mentioned at the outset, so that the delivery amount does not exceed a predetermined value. If the value is below 1), disconnect the variable displacement pump from the load and place it in the tank.
This is achieved by simultaneously connecting a constant volume shadow pump to the load and maintaining the operating pressure.
従って、可変容量形ポンプと定審量潜ポンプ線、可変容
量形ポンプが、特性−線の切換点火では負荷に接続され
、次いで、送給量が所定値を下回つ九場合、即ち、上記
ポンプがゼロストローク範囲で作動する場合は圧損なく
タンクに接続されるよう、切換えられる。Therefore, when the variable displacement pump and the fixed displacement submersible pump line, the variable displacement pump is connected to the load at the switching ignition of the characteristic line, and then the delivery amount is less than the predetermined value, i.e., the above-mentioned When the pump operates in the zero stroke range, it is switched so that it is connected to the tank without pressure loss.
定容量形ポンプは、可変容量形ポンプよりも出力が小さ
い。双方のポンプＯ出力比は、１５よｐも大きくて！ｈ
工い。即ち、定容量形ポンプの駆動出力と、タンクに接
続した状態の可変容量形ポンプの絞夕損失との和は、可
変容量形ポンプのゼロス）Ｅｌ−り出力の数分のＩＫす
ぎない。Fixed displacement pumps have a lower output than variable displacement pumps. The O output ratio of both pumps is as much as 15p! h
Work. That is, the sum of the driving output of the constant displacement pump and the throttling loss of the variable displacement pump connected to the tank is only a few times the IK of the zero output of the variable displacement pump.
切換点に達し、可変容量形ポンプがタンクに接続される
と、系が不安定となることはない。何故ならば、定容量
形ポンプのみが作動し、上記ポンプは、更に、運転圧を
調節、保持するリリーフ弁によって保饅されるからであ
る。Once the switching point is reached and the variable displacement pump is connected to the tank, the system will not become unstable. This is because only fixed-displacement pumps are activated, which are additionally maintained by a relief valve that regulates and maintains the operating pressure.
本発明の実施例は、従属特許結末範囲に示しである。Embodiments of the invention are illustrated in the dependent patent results.
特許請求の範囲第２項にもとづき、可変容量形ポンプの
切換点は、送給量測定装置および調節自任の基準電圧に
依存するので、送給量が特定値を下回ると、ポンプの高
圧回路の方向制御弁がトリガされ、可変容量形ポンプか
ら定容量形ポンプへあるいは定容量形ポンプから可変容
量形ポンプへ切換えられる。Based on claim 2, the switching point of the variable displacement pump depends on the feed rate measuring device and the self-adjustable reference voltage, so that when the feed rate falls below a certain value, the high-pressure circuit of the pump is activated. A directional control valve is triggered to switch from a variable displacement pump to a constant displacement pump or from a constant displacement pump to a variable displacement pump.
特許請求の範屈第３項にもとづき、可変容量形ポンプが
負荷に接続されている限り、定容量形ポンプはタンクに
接続される。According to claim 3, the constant displacement pump is connected to the tank as long as the variable displacement pump is connected to the load.
本発明の実施例を、図面を参照して以下に説明する。Embodiments of the invention will be described below with reference to the drawings.
縞１図に、公知の可変容量形ポンプ１０を示した。上記
ポンプの固定子リング（図示してない）は、圧力調節器
１５の図示の調節位置では、ポンプ高圧回路２０の系圧
力を受ける２／）のピストン１１．１２の間に固定され
る。FIG. 1 shows a known variable displacement pump 10. In the illustrated adjustment position of the pressure regulator 15, the stator ring (not shown) of the pump is fixed between the pistons 11.12 of the pump high-pressure circuit 20 (2/) which receives the system pressure.
負荷によって液体が引出されず、従って、圧力が最高値
に違すると、可変容量形ポンプの送給量はほぼゼロに調
節され、圧力（ゼロストレーク圧と呼ぶ）が保持される
。If no liquid is drawn by the load and therefore the pressure is different from the maximum value, the delivery of the variable displacement pump is regulated to approximately zero and the pressure (referred to as zero strake pressure) is maintained.
ポンプ高圧回路２Ｑのゼロストローク圧は、圧力調節器
１５のバネ１４によって所菫値に設定できる。バネ１４
は、まず、圧力調節器１５のピストンを圧力調節ｂｃ）
図示の切換位置に対応する出力位置に保持し、ポンプ高
圧回路２０は、ピストン１２の背後のスペースに接続さ
れる。かくして可変容量形ポンプの固定子リングは、最
大送給容積に設定される。The zero stroke pressure of the pump high pressure circuit 2Q can be set to a desired value by the spring 14 of the pressure regulator 15. spring 14
First, the piston of the pressure regulator 15 is pressure adjusted bc)
Maintained in the output position corresponding to the switching position shown, the pump high-pressure circuit 20 is connected to the space behind the piston 12. The stator ring of the variable displacement pump is thus set to maximum delivery volume.
送給流れは、ポンプ高圧−路２０、方向制御弁２１およ
び送給量測定装置２２を経て負荷２３に達する。The feed stream reaches the load 23 via the pump high pressure line 20, the directional control valve 21 and the feed rate measuring device 22.
圧力が、バネ１４によって設定した数値に達すると、圧
力調節器１５のピストンが移動し、かくして、圧力調節
器１５は、ピストン１２の背後のスペースが低圧に調節
される調節位置に達する０かくして、ピストン１１が、
固定子リングをシフトシ、ポンプＦｉ！定せるゼロスト
ローク圧を保持するのに必要な量のみを負荷に送る。第
２図に特性曲線を示した０
負荷が必要とする送給蓋が極めて少ない場合は、ｏＪ変
谷量形ポンプはゼロストローク範Ｈに達するが、ポンプ
の駆動電力は、なお、比較的大きい０可変ｙＴｊｋ形ポ
ンプ１０よりも出力が小さい定容量形ポンプへの切換は
、コンパレータ２５において送給量測定装置２２の実電
圧を目ｔａｔ圧２４と比較し、上記コンパレータの出力
電圧に工ってドライバ回路２６を賦活し、上記回路に工
って方向制御弁２１を切換えることによって行う。When the pressure reaches the value set by the spring 14, the piston of the pressure regulator 15 moves and thus reaches the regulating position in which the space behind the piston 12 is regulated to a low pressure. The piston 11 is
Shift the stator ring, pump Fi! Only the amount necessary to maintain the specified zero stroke pressure is sent to the load. The characteristic curve is shown in Figure 2.0 If the load requires very few feed caps, the oJ variable displacement pump reaches the zero stroke range H, but the driving power of the pump is still relatively large. To switch to a constant displacement pump with a smaller output than the variable yTjk pump 10, the comparator 25 compares the actual voltage of the feed amount measuring device 22 with the target tat pressure 24, and adjusts the output voltage of the comparator. This is done by activating the driver circuit 26 and modifying the circuit described above to switch the directional control valve 21.
方向側（財）弁２１が切換えられると、可変容量形ポン
プ１０がタンクに接続され、一方、定容量形ポンプ３０
が一定の送給流れを負荷に送る。この場合、生ずる絞り
ロスは極めて小さい。When the direction valve 21 is switched, the variable displacement pump 10 is connected to the tank, while the fixed displacement pump 30 is connected to the tank.
delivers a constant feed flow to the load. In this case, the squeezing losses that occur are extremely small.
定容量形ポンプ３０と方向制御弁２１との関の路には、
運転圧に設定されておや、定容量形ポンプの送給流れＯ
過剰をタンクに排出するリリーフ弁３２が設けである。In the passage between the constant displacement pump 30 and the directional control valve 21,
When the operating pressure is set, the supply flow of the fixed displacement pump is O.
A relief valve 32 is provided to drain excess into a tank.
第２図に示し九如く、可変容量形ポンプ１０を切離し、
定容量形ポンプｓｒＡを簑絖する切換点紘、時点３８に
ある０この場合、双方の運転方式において同一の最大圧
が得られるよう、リリーフ弁３２紘、圧力調節弁１５と
正ＩＮＫ同一の圧力に設定する０
第２図の破線に示しえ如く、リリーフ弁３２は、負荷２
ｓＫ必要な別の運転圧に設定することもで自、従って、
双方の圧力、Ｐｍ１ｎ（リリーフ弁の最小圧）とＰｍａ
ｘ （定容量形ポンプの最大許容圧）との間には、特性
曲線図が得られる。As shown in FIG. 2, the variable displacement pump 10 is separated,
The switching point for the constant displacement pump srA is at time 38. In this case, in order to obtain the same maximum pressure in both operating modes, the relief valve 32, the pressure regulating valve 15 and the positive INK are set at the same pressure. The relief valve 32 is set to 0 as shown by the broken line in FIG.
sK can also be set to a different operating pressure as required; therefore,
Both pressures, Pm1n (minimum pressure of the relief valve) and Pma
x (maximum allowable pressure of a constant displacement pump), a characteristic curve diagram is obtained.
リリーフ弁３２を、例えば、弁１５よりも小さい数値（
圧力）に設定すれば、方向制御弁２１が切換えられ九場
合、即ち、過給量が所定値を下回った場合、負荷の圧力
は、リリーフ弁２１に設定した圧力値に達するにすぎな
い。従って、方向制御弁２１の切換時、圧力は上記数値
に降下すゐＯで、可変容量形ポンプ１０は何等の影響も
受けない。方向制御弁２１のこの別の切換位置では、可
変容量形ポンプは、圧損なく最大量をタンクへ送る。For example, set the relief valve 32 to a value smaller than that of the valve 15 (
pressure), the load pressure only reaches the pressure value set in the relief valve 21 when the directional control valve 21 is switched, that is, when the supercharging amount falls below a predetermined value. Therefore, when the directional control valve 21 is switched, the pressure drops to the above value by 0, and the variable displacement pump 10 is not affected in any way. In this further switching position of the directional control valve 21, the variable displacement pump delivers the maximum amount to the tank without pressure loss.
可変容量ポンプの調節のため、図示の圧力調節器１５の
代わりに流量調節器または出力調節器を設けることもで
きる。For regulating the variable displacement pump, instead of the illustrated pressure regulator 15, a flow regulator or a power regulator can also be provided.
第１図は、調節装置の第１実施例の回路図、第２図は、
第１図の調節装置の特性曲線を示す図面である０
１０・・・・可変容量形ポンプ、１５・−・―圧力調節
器、２１＠・・・方向制御弁、２３・・・・負荷、３０
・・・争定容量形ポンプ。
代理人山川政樹（ほか１名）FIG. 1 is a circuit diagram of a first embodiment of the adjusting device; FIG.
1 is a drawing showing characteristic curves of the regulating device of FIG. 1. 30
...Conflict displacement pump. Agent Masaki Yamakawa (and 1 other person)
Claims (1)
流量調節器によって作動部材を調節できる形式の可変容
量形ポンプの調節装置において、小容量の定容量形ポン
プ（３０）が、可変容量形ポンプ（１０）に並列に設け
てあり、送給量が所定値を下回ると、可変容量形ポンプ
が、負荷（２３）から切離されてタンクに接続され、同
時に、定容量形ポンプが負荷に接続されることを特徴と
する調節装置。 Ｑ）送給量測定装置（２２）が、ポンプの高圧回路（２
０）に設けてあり、上記測定装置の出方信号は、コンパ
レータ（２５）において、調節自在の基準信号と比較さ
れ、上記コンパレータの出力信号は、送給量測定装置と
可変容量形ポンプとの間に設けてあって、定容量形ポン
プ（３０）をポンプの高圧回路に接続すると同時に可変
容量形ポンプをタンクＫＩＩ続する方向制御弁（２１、
２１０）をトリガすることを特徴とする特許請求の範囲
第１項記載の調節装置。 （萄方向調御弁（２１）が、１つの切換位置では、可変
容量形ポンプ（１０）を負荷に接続し且つｔ九定容量形
ポンプ（３０）をタンクにＩＩ！ｌ！シ、別の切換位置
で紘、可賓客量形ポンプをタンクＫＩＩＩ絖し且つま九
定容量形ポンプを負荷にｌＩ絖することを特徴とする特
許請求の範囲第１項または第２項記載の調節装置。(1) In a variable displacement pump adjustment device of the type in which the operating member can be adjusted by a rounding pressure regulator and a flow rate regulator to adjust the amount of feed to the load, a small-capacity fixed displacement pump (30) , is provided in parallel with the variable displacement pump (10), and when the feed rate falls below a predetermined value, the variable displacement pump is disconnected from the load (23) and connected to the tank, and at the same time, the fixed displacement pump is disconnected from the load (23) and connected to the tank. A regulating device characterized in that a pump is connected to a load. Q) The feed rate measuring device (22) is connected to the high pressure circuit (22) of the pump.
0), the output signal of the measuring device is compared with a freely adjustable reference signal in a comparator (25), and the output signal of the comparator is the output signal of the feed rate measuring device and the variable displacement pump. A directional control valve (21,
210). Adjustment device according to claim 1, characterized in that it triggers the adjustment device 210). (In one switching position, the directional control valve (21) connects the variable displacement pump (10) to the load and connects the constant displacement pump (30) to the tank. 3. The adjusting device according to claim 1 or 2, wherein in the switching position, the variable capacity pump is connected to the tank KIII, and the constant displacement pump is connected to the load.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE32001266 | 1982-01-05 | ||
| DE19823200126 DE3200126A1 (en) | 1982-01-05 | 1982-01-05 | Control device for a variable displacement pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58119982A true JPS58119982A (en) | 1983-07-16 |
| JPH0319396B2 JPH0319396B2 (en) | 1991-03-14 |
Family
ID=6152633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57234866A Granted JPS58119982A (en) | 1982-01-05 | 1982-12-28 | Regulator for variable-capacity type pump |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS58119982A (en) |
| DE (1) | DE3200126A1 (en) |
| IT (1) | IT1155229B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157027A (en) * | 2006-11-27 | 2008-07-10 | Nachi Fujikoshi Corp | Electromagnetic pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3347015A1 (en) * | 1983-12-24 | 1985-07-04 | Alfred Teves Gmbh, 6000 Frankfurt | PRESSURE CONTROL DEVICE FOR A HYDRAULIC PUMP, IN PARTICULAR A LEAF CELL PUMP |
| DE3708940A1 (en) * | 1987-03-20 | 1988-10-06 | Ruthmann Anton Gmbh & Co | Hydraulic drive for aerial lift devices (cherry pickers) or the like |
| DE3807510A1 (en) * | 1988-03-08 | 1989-09-21 | Joachim Friedrich Knauer | Device for pumping against a growing counterpressure |
| DE4108915C2 (en) * | 1991-03-19 | 2002-08-01 | Bosch Gmbh Robert | Hydraulic device for supplying pressure medium to a privileged primary load circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2413295B2 (en) * | 1974-03-20 | 1978-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | CONTROL DEVICE FOR AN ADJUSTABLE PUMP |
| DE3016609A1 (en) * | 1980-04-30 | 1981-11-05 | G.L. Rexroth Gmbh, 8770 Lohr | Radial vane type pump - has throughput controlled by positioning valve energised by signal from discharge flow meter |
-
1982
- 1982-01-05 DE DE19823200126 patent/DE3200126A1/en active Granted
- 1982-12-28 JP JP57234866A patent/JPS58119982A/en active Granted
- 1982-12-31 IT IT25091/82A patent/IT1155229B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157027A (en) * | 2006-11-27 | 2008-07-10 | Nachi Fujikoshi Corp | Electromagnetic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8225091A0 (en) | 1982-12-31 |
| DE3200126C2 (en) | 1988-06-01 |
| DE3200126A1 (en) | 1983-07-14 |
| JPH0319396B2 (en) | 1991-03-14 |
| IT1155229B (en) | 1987-01-21 |
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