JPH05202911A - Warming up of pressure media in hydraulic circuit and its device - Google Patents

Warming up of pressure media in hydraulic circuit and its device

Info

Publication number
JPH05202911A
JPH05202911A JP4285846A JP28584692A JPH05202911A JP H05202911 A JPH05202911 A JP H05202911A JP 4285846 A JP4285846 A JP 4285846A JP 28584692 A JP28584692 A JP 28584692A JP H05202911 A JPH05202911 A JP H05202911A
Authority
JP
Japan
Prior art keywords
pressure
pipe
pump
signal
valve
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.)
Pending
Application number
JP4285846A
Other languages
Japanese (ja)
Inventor
Walter Kropp
クロップ ヴァルター
Herbert Oswald
オスヴァルト ヘルベルト
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of JPH05202911A publication Critical patent/JPH05202911A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0427—Heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/045—Compensating for variations in viscosity or temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6343—Electronic controllers using input signals representing a temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/66—Temperature control methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/851—Control during special operating conditions during starting

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

PURPOSE: To simplify a warming up process of a building machine with a hydraulic pressure circuit to enable the warming up automatically without participating in an operator. CONSTITUTION: The temperature of a pressure medium is continuously measured by a temperature sensor 17 and is reported to a warm-up adjuster 18 with a comparator storing the temperature limit. During the temperature has not reached the critical temperature, an escape valve is retained at the original position and the pressure supplied by an auxiliary constant volume type pump 13 is transmitted as a third signal to a desired flow rate regulator 6. When the temperature reached the critical temperature, the escape valve is switched to a connection position by the adjuster 18 and the transmission of the third signal is stopped.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、液圧回路内の圧力媒体
をウォームアップする方法、それも、圧力が形成され、
特定圧力に達すると、圧力媒体が、より低い圧力レベル
にもたらされる形式のものに関する。本発明は、また、
前記ウォームアップに適する装置に関するものである。FIELD OF THE INVENTION The present invention relates to a method for warming up a pressure medium in a hydraulic circuit, in which a pressure is created,
When a certain pressure is reached, the pressure medium is of the type brought to a lower pressure level. The present invention also provides
The present invention relates to a device suitable for the warm-up.

【０００２】[0002]

【従来の技術】液圧回路を有する実用車、たとえば建設
機械、特に掘削機は、作業開始前にウォームアップを行
なって、摩耗を僅かに抑えねばならない。その場合、ウ
ォームアップ処置は、大抵液圧エネルギーの消費器を起
動することによって行なわれる。消費器はそのさい制動
される。消費器へ通じる管内に生じる圧力が圧力制限弁
により減圧され、そのさい圧力制限弁から噴出する圧力
媒体が加熱される。ウォームアップの状態は、もっぱら
運転者により規定される。ウォームアップ過程は運転者
により任意に制御されるからである。2. Description of the Related Art A utility vehicle having a hydraulic circuit, for example, a construction machine, particularly an excavator, must be warmed up before starting work to slightly suppress wear. In that case, the warm-up procedure is usually performed by activating a consumer of hydraulic energy. The consumer is then braked. The pressure generated in the pipe leading to the consumer is reduced by the pressure limiting valve, and the pressure medium ejected from the pressure limiting valve is heated. The warm-up state is defined solely by the driver. This is because the warm-up process is arbitrarily controlled by the driver.

【０００３】[0003]

【発明が解決しようとする課題】本発明の根底をなす課
題は、ウォームアップ過程を簡単化することにある。The problem underlying the present invention is to simplify the warm-up process.

【０００４】[0004]

【課題を解決するための手段】この課題は、本発明によ
れば、次のようにすることにより解決された。すなわ
ち、液圧回路内の圧力媒体及び又は構成部品のうちの少
なくとも１つの部品の温度を継続的に測定し、限界温度
に達するまでウォームアップ過程が、強制的に続けられ
るようにするのである。このウォームアップ過程は、し
たがって、冷え過ぎた機械の場合にも自動的に行なわ
れ、運転者には消費器の操作による煩わしいウォームア
ップ処置が要求されることはない。なぜなら、機械の始
動を除いて運転者はウォームアップ過程に介入する必要
はないからである。加えて、作業開始時には機械が既に
使用温度、もしくは少なくとも、摩耗が低減される温度
に確実に達しているようにされている。According to the present invention, this problem has been solved by the following. That is, the temperature of the pressure medium and / or at least one of the components in the hydraulic circuit is continuously measured, and the warm-up process is forced to continue until the limit temperature is reached. This warm-up process is therefore carried out automatically even in the case of machines that are too cold and the driver is not required to carry out a troublesome warm-up procedure by operating the consumer. This is because the driver does not have to intervene in the warm-up process except for starting the machine. In addition, it is ensured that at the start of work the machine has already reached the operating temperature, or at least the temperature at which wear is reduced.

【０００５】特に有利には、次のような形式の方法、す
なわち、静液圧式可変容量形ポンプの供給量が所要流量
調整器により調整され、供給圧力に依存する第１信号と
消費器圧力に依存する第２信号が所要流量調整器に送ら
れる形式の方法の場合に、第２信号と等方向に作用する
第３の信号が限界温度に達するまで所要流量調整器に送
られるようにし、かつまた可変容量形ポンプを行程容積
増大の方向へ調節するようにする。このようにして、既
に液圧回路内に存在する構成部品をウォームアップに利
用するのである。Particularly advantageously, the feed rate of the hydrostatic variable displacement pump is regulated by the required flow regulator and is dependent on the feed pressure as a first signal and the consumer pressure. In the case of a method in which a second dependent signal is sent to the required flow regulator, a third signal acting in the same direction as the second signal is sent to the required flow regulator until a limit temperature is reached, and Further, the variable displacement pump is adjusted in the direction of increasing the stroke volume. In this way, the components already present in the hydraulic circuit are used for warming up.

【０００６】本発明の更に別の構成によれば、液圧回路
が、ウォームアップの間には部分負荷のもとで使用さ
れ、それにより出来るだけ穏やかなウォームアップが達
成される。According to a further development of the invention, the hydraulic circuit is used under partial load during warm-up, so that a warm-up as gentle as possible is achieved.

【０００７】本発明による方法の場合、大抵は液圧ポン
プが内燃機関により駆動されるので、内燃機関は、液圧
回路の全負荷時に予定されている使用回転数よりも低回
転数で作動するようにするのが有利である。そうするこ
とで、未だ冷えている内燃機関の摩耗が低減される。こ
の構成の場合には、更に、内燃機関の回転数を温度上昇
につれて高めて、ウォームアップ過程を加速するように
する。In the case of the method according to the invention, the hydraulic pump is usually driven by the internal combustion engine, so that the internal combustion engine operates at a rotational speed lower than the intended rotational speed at full load of the hydraulic circuit. It is advantageous to do so. By doing so, the wear of the still cold internal combustion engine is reduced. In the case of this configuration, the rotational speed of the internal combustion engine is further increased as the temperature rises so as to accelerate the warm-up process.

【０００８】本発明の方法を実施するため、次の形式の
装置の場合、つまり、液圧回路が、静液圧式可変容量形
ポンプと、このポンプに接続された少なくとも１つの消
費器と、所要流量調整器とを有しており、この調整器を
前記ポンプの供給圧力に依存する第１信号と、消費器の
圧力に依存する第２信号とによって制御可能である形式
の装置の場合に、本発明によれば、ウォームアップ調整
器が、所要流量調整器と作用接続されており、またウォ
ームアップ調整器には、入口側に液圧回路内の圧力媒体
及び又は構成部品の少なくとも１つの温度を測定する温
度センサが接続され、かつまた限界温度値を記憶する比
較装置が備えられており、しかも限界温度以下では所要
流量調整器に対し第３信号が可変容量形ポンプの行程容
積増加方向に作用するようにされている。In order to carry out the method of the invention, in the case of a device of the following type: a hydraulic circuit, a hydrostatic variable displacement pump and at least one consumer connected to this pump are required. A flow regulator, which regulator is controllable by a first signal dependent on the supply pressure of the pump and a second signal dependent on the pressure of the consumer, According to the invention, a warm-up regulator is operatively connected to the required flow regulator, and the warm-up regulator has, on the inlet side, the temperature of at least one of the pressure medium and / or the components in the hydraulic circuit. A temperature sensor for measuring the temperature is connected, and a comparator for storing the limit temperature value is also provided. Moreover, below the limit temperature, the third signal is transmitted to the required flow rate regulator in the direction of increasing the stroke volume of the variable displacement pump. Action I have been to so that.

【０００９】本発明の装置の別の有利な構成によれば、
補助定容量形ポンプに消費器を制御する制御器が接続さ
れている場合に、このポンプの供給管の途中に配置さ
れ、限界温度到達時にばね力に抗して初期位置から接続
位置へ切換可能な逃し弁の作用接続が形成され、この逃
し弁がウォームアップ調整器により接続位置方向に負荷
される。その場合、逃し弁の初期位置では、前記ポンプ
との制御器の接続が遮断され、かつ所要流量調整器が、
第３信号が案内される信号管と接続される。また、逃し
弁の接続位置では、前記ポンプが制御器と接続され、信
号管が中断される。限界温度に未だ達しない間は、ウォ
ームアップ調整器は受動的であるから、逃し弁はその初
期位置に留まるため、信号管内と所要流量調整器のとこ
ろには、可変容量形ポンプの行程容積増大方向に作用す
る第３信号が発生する。同時に消費器の任意の起動が阻
止されることにより、消費器の偶然的な運動が確実に防
止される。限界温度に達すると、直ちにウォームアップ
調整器から逃し弁へ伝えられる信号によって、逃し弁が
初期位置から接続位置へ切換えられ、それによって所要
流量調整器への第３信号の伝達が遮断される。それに続
いて可変容量形ポンプが再び最低行程容積へ切換えられ
る。補助定容量形ポンプからの供給圧力を制御器に負荷
することにより消費器を任意に起動することが、再び可
能となる。According to another advantageous configuration of the device according to the invention,
When a controller for controlling the consumer is connected to the auxiliary constant displacement pump, it is placed in the middle of the supply pipe of this pump and can switch from the initial position to the connection position against the spring force when the limit temperature is reached. A working connection of the relief valve is formed, which is loaded by the warm-up regulator in the direction of the connection position. In that case, in the initial position of the relief valve, the connection of the controller with the pump is cut off, and the required flow rate regulator is
The third signal is connected to the signal pipe to be guided. Further, at the connection position of the relief valve, the pump is connected to the controller and the signal pipe is interrupted. Since the warm-up regulator remains passive while the limit temperature is not yet reached, the relief valve remains in its initial position, increasing the stroke volume of the variable displacement pump in the signal pipe and at the required flow regulator. A directional third signal is generated. At the same time, blocking any activation of the consumer ensures that accidental movement of the consumer is prevented. As soon as the limit temperature is reached, the signal transmitted from the warm-up regulator to the relief valve causes the relief valve to switch from the initial position to the connected position, which interrupts the transmission of the third signal to the required flow regulator. The variable displacement pump is then switched back to the minimum stroke volume. It is again possible to optionally activate the consumer by loading the controller with the supply pressure from the auxiliary constant displacement pump.

【００１０】第１の変化形によれば、逃し弁の初期位置
で補助定容量形のポンプの供給管がシャトル弁の第１の
入口に接続されるようにするのが有利である。シャトル
弁の第２の入口は、その場合、消費器の圧力を負荷可能
の管に接続され、シャトル弁の出口は、可変容量形ポン
プの供給量増加方向に作用する所要流量調整器制御面に
接続されるようにする。ウォームアップの間、所要流量
調整器に作用する第３信号は、したがって、補助定容量
形ポンプの供給流ないし供給圧力によって提供され、通
常の作業運転時に消費器圧力を負荷可能のロード・セン
シング管内へ供給される。これによって所要流量調整器
のロード・センシング側は、可変容量形ポンプの供給量
増加方向に負荷される。According to the first variant, it is advantageous if in the initial position of the relief valve the feed pipe of the auxiliary constant displacement pump is connected to the first inlet of the shuttle valve. The second inlet of the shuttle valve is then connected to a pipe capable of loading the pressure of the consumer, and the outlet of the shuttle valve is connected to the required flow regulator control surface acting in the direction of increasing the feed rate of the variable displacement pump. To be connected. During warm-up, the third signal acting on the required flow regulator is therefore provided by the feed or pressure of the auxiliary constant displacement pump in a load-sensing pipe that can load the consumer pressure during normal work operation. Is supplied to. As a result, the load sensing side of the required flow rate regulator is loaded in the direction of increasing the supply amount of the variable displacement pump.

【００１１】この第１変化形の代りに、第２変化形にし
たがって次のようにすることも可能である。すなわち、
所要流量調整器が、可変容量形ポンプの供給量増加方向
に付加的に作用する制御面を有し、この制御面へ逃し弁
と接続される信号管が通じるようにし、この信号管が、
逃し弁の初期位置では補助定容量ポンプの供給管と、ま
た接続位置では排出管と接続されるようにするのであ
る。この場合も、要するに、補助定容量形のポンプの供
給圧力が、第３信号として利用され、ウォームアップ過
程の間に特別な信号管を介して所要流量調整器へ供給さ
れる。Instead of the first variation, it is also possible to perform the following according to the second variation. That is,
The required flow rate regulator has a control surface that acts additionally in the direction of increasing the supply amount of the variable displacement pump, and a signal tube connected to the relief valve communicates with this control surface, and the signal tube,
The relief valve is connected to the supply pipe of the auxiliary constant-volume pump at the initial position and to the discharge pipe at the connection position. Also in this case, in short, the supply pressure of the auxiliary constant displacement pump is used as the third signal and is supplied to the required flow regulator via a special signal tube during the warm-up process.

【００１２】最後は第３の変化形であるが、この場合に
は、逃し弁の初期位置では信号管が、可変容量形ポンプ
の供給圧を案内する管と、逃し弁の接続位置では消費器
圧力を案内する管と接続される。信号管は、したがって
常時使用される。すなわち、ウォームアップ時には、高
圧回路から取出される第３信号を案内するために、また
機械の通常の作業運転時には、ロード・センシング信号
を案内するために、使用される。Finally, in the third variation, in this case, a signal pipe is provided at the initial position of the relief valve, a pipe for guiding the supply pressure of the variable displacement pump and a consumer at the connection position of the relief valve. It is connected to a pipe that guides pressure. The signal tube is therefore always used. That is, it is used during warm-up to guide the third signal taken from the high-voltage circuit and during normal machine operation of the machine to guide the load-sensing signal.

【００１３】これら３種の変化形を有利に更に構成し、
可変容量形ポンプの、供給圧力を負荷可能な管の途中に
圧力制限弁を配置した場合に、次のようにすることを提
案する。すなわち、前記圧力制限弁に対して、第１の絞
りを間そうした上で第２の圧力制限弁を並列配置するの
である。そのさい第１の圧力制限弁が負荷除去接続部を
有するようにし、この接続部が、第２の圧力制限弁の負
荷接続部と接続されるようにする。更にまた負荷除去接
続部からは逃し弁へ通じる管が分岐するようにし、この
管の途中に第２の絞りを設け、かつこの管が、逃し弁の
初期位置では排出管と接続され、接続位置では遮断され
るようにする。可変容量形ポンプの行程容積増大の結
果、その供給管内に生じる圧力は、２つの圧力制限弁の
特別な配置の結果、作業運転時に許容される最大の、第
１圧力制限弁により設定される圧力以下の値に制限され
る。Advantageously further comprising these three variants,
It is proposed to do the following when a pressure limiting valve is placed in the middle of a pipe of a variable displacement pump capable of loading the supply pressure. That is, the second pressure limiting valve is arranged in parallel with the pressure limiting valve with the first throttle interposed. The first pressure limiting valve then has a load removal connection, which is connected to the load connection of the second pressure limiting valve. Furthermore, a pipe leading to the relief valve is branched from the load removal connection, a second throttle is provided in the middle of this pipe, and this pipe is connected to the discharge pipe at the initial position of the relief valve, and the connection position Let's block it. As a result of the increased displacement volume of the variable displacement pump, the pressure generated in its supply pipe is the maximum pressure set by the first pressure limiting valve during working operation, as a result of the special arrangement of the two pressure limiting valves. Limited to the following values:

【００１４】前述の変化形のどれが用いられるにせよ、
次のようにするのが有利である。すなわち、２つのイン
プットを有する加算器を比較装置に後置するようにし、
加算器の一方のインプットに比較装置のアウトプット
を、また他方のインプットには任意に操作可能のオンオ
フ・スイッチを接続しておくようにする。したがって、
ウォームアップ段階の終了後に消費器を制御器を介して
起動するために逃し弁をカットインするには、前記オン
オフ・スイッチを操作する必要がある。なぜなら、加算
器の出力信号を生じさせるには、第１の入力信号を加算
器のところに発生させる限界温度に達せねばならないだ
けではなく、第２のインプットのところにも信号、すな
わちオンオフ・スイッチのカットイン信号を生じさせね
ばならない。Whichever of the above variants is used,
It is advantageous to do the following: That is, an adder having two inputs is placed after the comparator,
An output of the comparator is connected to one input of the adder, and an arbitrarily operable on / off switch is connected to the other input. Therefore,
To cut in the relief valve to activate the consumer via the controller after the end of the warm-up phase, it is necessary to operate the on / off switch. This is because not only the limit temperature at which the first input signal is generated at the adder must be reached in order to produce the output signal of the adder, but also at the second input there is a signal, an on / off switch. Must produce a cut-in signal of.

【００１５】[0015]

【実施例】本発明のそのほかの利点及び詳細を図示の実
施例について説明する。Further advantages and details of the invention will be explained with reference to the exemplary embodiments shown.

【００１６】図１には、内燃機関１により駆動され、供
給管３を有する静液圧式可変容量形ポンプ２が示されて
いる。供給管３には、液圧エネルギーの複数消費器（図
示せず）が弁装置４を介して接続されている。これら消
費器とは、たとえば油圧式掘削機に通常備えられている
消費器、たとえば回転装置の駆動部、トラベルモータ、
ブーム用シリンダ、ショベル用シリンダ等である。弁装
置４は、ロード・センシング管５に接続され、この管５
内には作業運転中には消費器の１つのところに発生する
最高圧力が案内され、この最高圧力は、可変容量形ポン
プ２の供給量調整のために用いられる。この目的のた
め、公知の形式で所要流量調整器６が備えられている。
調整器６は、供給管３から分岐する管７の途中に接続さ
れている。管７はポンプ２の調節シリンダ８に通じてい
る。調整器６は、作業運転時にはポンプ２の供給圧（第
１信号）と最高消費器圧力（第２信号）とにより制御さ
れる。供給管３及びロード・センシング管５とには、圧
力制限弁９，１０により安全措置が講じられている。弁
装置４の起動は制御器１１を介して行なわれる。制御器
１１は、同じく内燃機関１により駆動される補助定容量
形ポンプ１３の供給管１２への接続用に備えられてい
る。FIG. 1 shows a hydrostatic variable displacement pump 2 driven by an internal combustion engine 1 and having a supply pipe 3. Plural consumers of hydraulic energy (not shown) are connected to the supply pipe 3 via a valve device 4. These consumers are, for example, the ones usually provided in hydraulic excavators, such as the drive unit of a rotating device, the travel motor,
Boom cylinders, shovel cylinders, etc. The valve device 4 is connected to a load sensing pipe 5, which pipe 5
During work operation, the maximum pressure generated at one of the consumers is guided, and this maximum pressure is used for adjusting the feed rate of the variable displacement pump 2. For this purpose, the required flow regulator 6 is provided in a known manner.
The regulator 6 is connected in the middle of a pipe 7 branched from the supply pipe 3. The pipe 7 leads to an adjusting cylinder 8 of the pump 2. The regulator 6 is controlled by the supply pressure of the pump 2 (first signal) and the maximum consumer pressure (second signal) during work operation. Safety measures are taken for the supply pipe 3 and the load sensing pipe 5 by pressure limiting valves 9 and 10. The activation of the valve device 4 is carried out via the controller 11. The controller 11 is provided for connecting the auxiliary constant displacement pump 13 that is also driven by the internal combustion engine 1 to the supply pipe 12.

【００１７】内燃機関１の始動後、ポンプ２は最低供給
量に調節される。なぜなら、消費器の非操作時には供給
管３と管７との内部の供給圧力は、図の右方向へ所要流
量調整器を移動させ、それによって調節シリンダ８内の
圧力媒体が、シリンダ内の調節ピストンの両側に作用す
ることになり、面積比の結果、ピストンはポンプ２を最
低供給量に調節した場合に相応する位置に移動するから
である。圧力媒体、ひいては液圧構成部品をウォームア
ップするためには、従来の技術では、消費器の１つを起
動して、これを固定ないしは制動しておき、それによっ
て所要流量調整器６には供給圧力のほかに消費器圧力も
作用し、ポンプ２の供給量は、供給管３内の圧力上昇の
結果、圧力制限弁９が開弁し、貯蔵容器内の圧力媒体が
同時加熱されて噴射されるまで増加せしめられる。After starting the internal combustion engine 1, the pump 2 is adjusted to the minimum supply. Because, when the consumer is not in operation, the supply pressure inside the supply pipe 3 and the pipe 7 moves the required flow rate regulator to the right in the figure, whereby the pressure medium in the adjusting cylinder 8 is adjusted in the cylinder. This is because it acts on both sides of the piston, and as a result of the area ratio, the piston moves to the corresponding position when the pump 2 is adjusted to the minimum feed rate. In order to warm up the pressure medium, and thus the hydraulic component, in the prior art, one of the consumers is activated and fixed or braked so that the required flow regulator 6 is supplied. In addition to the pressure, the consumer pressure also acts, and the supply amount of the pump 2 is increased by the pressure increase in the supply pipe 3, the pressure limiting valve 9 is opened, and the pressure medium in the storage container is simultaneously heated and injected. Can be increased until

【００１８】本発明によれば、その場合、補助定容量形
ポンプ１３の供給管１２の途中に２ポート２位置方向制
御弁として構成された逃し弁１４を配置し、この逃し弁
を電磁式に操作可能にしておく。逃し弁１４は、その初
期位置方向へばね負荷されており、その初期位置では、
制御器１１へのポンプ１３の供給管１２の接続を遮断さ
せる。制御器１１の入口接続部は、その代り無圧貯蔵容
器と接続される。同時に、供給管１２は信号管１５に接
続され、この信号管１５は、シャトル弁１６の第１の入
口と接続されている。シャトル弁１６は、その出口と第
２の入口がロード・センシング管５に接続されている。According to the invention, in this case, a relief valve 14 configured as a 2-port 2-position directional control valve is arranged in the supply pipe 12 of the auxiliary constant displacement pump 13 and this relief valve is electromagnetically operated. Keep it operable. The relief valve 14 is spring-loaded toward its initial position, and in its initial position,
The connection of the supply pipe 12 of the pump 13 to the controller 11 is cut off. The inlet connection of the controller 11 is instead connected to a pressureless storage container. At the same time, the supply pipe 12 is connected to a signal pipe 15, which is connected to the first inlet of the shuttle valve 16. The shuttle valve 16 has its outlet and second inlet connected to the load sensing pipe 5.

【００１９】温度センサ１７は、たとえば貯蔵容器内の
圧力媒体温度を測定できるように配置しておく。温度セ
ンサ１７は、ウォームアップ調整器１８に接続され、こ
の調整器は、出口側が逃し弁１４と接続され、出力信号
に接した場合には、逃し弁を接続位置、すなわち、ポン
プ１３の供給管１２が制御器１１に接続され、信号管１
５が無圧貯蔵容器に接続される接続位置の方向へ負荷す
るのである。ウォームアップ調整器１８は比較装置１９
を有し、この装置１９には温度センサ１７が接続され、
かつ限界温度値が記憶されている。比較装置１９の出口
は、加算器２０のインプットと接続され、加算器２０の
他方のインプットはエネルギー供給管２１に接続されて
いる。この供給管２１は、バッテリ２２に通じており、
更に供給管２１の途中には運転者が操作するオンオフ・
スイッチ２３が設けられている。また、加算器には演算
増幅器２４が後置されている。The temperature sensor 17 is arranged so that the temperature of the pressure medium in the storage container can be measured, for example. The temperature sensor 17 is connected to a warm-up regulator 18, which on the outlet side is connected to the relief valve 14 and when the output signal is contacted, the relief valve is in the connection position, that is, the supply pipe of the pump 13. 12 is connected to the controller 11, and the signal tube 1
5 is loaded in the direction of the connection position where it is connected to the pressureless storage container. The warm-up adjuster 18 is a comparison device 19
And a temperature sensor 17 is connected to the device 19,
And the limit temperature value is stored. The outlet of the comparison device 19 is connected to the input of the adder 20, and the other input of the adder 20 is connected to the energy supply pipe 21. This supply pipe 21 communicates with a battery 22,
In the middle of the supply pipe 21, an on / off switch operated by the driver
A switch 23 is provided. Further, an operational amplifier 24 is provided after the adder.

【００２０】以上説明した装置の作用形式は次の通りで
ある。The mode of operation of the apparatus described above is as follows.

【００２１】ウォームアップ過程の開始時に温度センサ
１７により測定された圧力媒体温度は、比較装置１９内
で限界温度値と比較され、機械が冷えている場合は、限
界温度に未到達であることが確認される。したがって、
比較装置１９からは信号が発せられないか、ないしはレ
ベル０の信号が加算器２０へ伝えられる。The pressure medium temperature measured by the temperature sensor 17 at the start of the warm-up process is compared with a limit temperature value in the comparison device 19, and if the machine is cold, the limit temperature may not be reached. It is confirmed. Therefore,
No signal is output from the comparator 19 or a level 0 signal is transmitted to the adder 20.

【００２２】この結果、加算器２０からも信号は先へ伝
えられないので、逃し弁１４は負荷されず、ばね負荷さ
れた初期位置に留まる。このためポンプ１３の供給管１
２（ポンプ１３の供給圧力は、このためウォームアップ
時にのみ作用する第３信号を形成する）は信号管５と接
続される。この結果、所要流量調整器６は、供給管１
２、信号管１５、シャトル弁１６、シャトル弁と調整器
６のばね側との間の、ロード・センシング管５の分岐管
５′を介して、ポンプ１３の供給圧を負荷されるので、
ポンプ２は供給量増大の方向へ調節される。これにより
圧力媒体は、供給管３の途中の圧力制限弁９を介して無
圧力の貯蔵容器へ噴射され、そのさいに加熱される。ポ
ンプ１３の供給圧による制御器１１の負荷は、シャトル
弁１４が初期位置にあるため阻止される。As a result, no signal is transmitted further from the adder 20, so that the relief valve 14 is not loaded and remains in the spring-loaded initial position. Therefore, the supply pipe 1 of the pump 13
2 (the supply pressure of the pump 13 thus forms a third signal which acts only during warm-up) is connected to the signal tube 5. As a result, the required flow rate adjuster 6 is
2, because the supply pressure of the pump 13 is loaded through the signal pipe 15, the shuttle valve 16, and the branch pipe 5 ′ of the load sensing pipe 5 between the shuttle valve and the spring side of the regulator 6,
The pump 2 is adjusted in the direction of increasing the supply amount. As a result, the pressure medium is injected into the pressureless storage container via the pressure limiting valve 9 in the middle of the supply pipe 3, and is heated at that time. The load on the controller 11 due to the supply pressure of the pump 13 is blocked because the shuttle valve 14 is in the initial position.

【００２３】限界温度に達すると、直ちにウォームアッ
プ調整器１８の比較装置１９が加算器２０へ信号を発す
る。オンオフ・スイッチ２３を運転者が入れるようにさ
れている場合には、加算器２０の第２の入口へも信号が
送られ、この結果、ウォームアップ調整器１８は、出力
信号を逃し弁１４へ送り、逃し弁１４は接続位置へ切換
えられる。信号管１５は、したがって、貯蔵容器と、供
給管１３は制御器と、それぞれ接続される。シャトル弁
１６は、その結果、所要流量調整器６へ消費器圧力を先
へ伝達可能な位置へ、妨げられることなく切換えられ
る。As soon as the limit temperature is reached, the comparator device 19 of the warm-up regulator 18 signals the adder 20. If the driver turns on the on / off switch 23, a signal is also sent to the second inlet of the adder 20, so that the warm-up regulator 18 sends the output signal to the relief valve 14. The feed and relief valve 14 is switched to the connected position. The signal tube 15 is thus connected to the storage container and the supply tube 13 to the controller, respectively. The shuttle valve 16 is consequently uninhibitedly switched to a position in which the consumer pressure can be forwarded to the required flow regulator 6.

【００２４】本発明の構成によれば、温度センサ１７は
付加的に調整器、すなわち演算増幅器２４へ接続されて
いる。調整器２４は内燃機関１の回転数に影響を与える
ために備えられている。これにより、機械の作業運転時
に、通常、ほぼ一定の使用回転数を有する内燃機関１
は、ウォームアップ段階には使用回転数より低い回転数
で作動することにより、冷間状態での摩耗が低減する。
加えて、ウォームアップの間、圧力媒体の温度の上昇に
つれて、調整器２４により内燃機関１の回転数を段階的
に、もしくは無段階的に上昇させ、ウォームアップ過程
を加速することも可能である。According to the arrangement of the invention, the temperature sensor 17 is additionally connected to a regulator, ie an operational amplifier 24. The regulator 24 is provided to influence the rotational speed of the internal combustion engine 1. As a result, during the working operation of the machine, the internal combustion engine 1 that normally has a substantially constant operating speed is used.
In the warm-up stage, the motor operates at a rotational speed lower than the rotational speed used, so that wear in the cold state is reduced.
In addition, during the warm-up, as the temperature of the pressure medium rises, it is also possible to increase the rotational speed of the internal combustion engine 1 stepwise or steplessly by the regulator 24 to accelerate the warm-up process. ..

【００２５】図２以下の各図の各部品には、図１の場合
と等しい符号を用いてある。図２の変化形では、所要流
量調整器６に、ポンプ２の行程容積増大方向に作用する
付加的な制御面が設けられ、信号管１５ａがこの制御面
へ通じている。信号管１５ａは、逃し弁１４ａの初期位
置でポンプ１３の供給管１２と接続されている。逃し弁
１４ａの接続位置では、信号管１５ａが無圧力の貯蔵容
器に接続され、供給管１２が制御器１１（図示せず）に
接続されている。ロード・センシング管５は、常時、調
整器６と接続されている。The same reference numerals as in FIG. 1 are used for the respective parts in FIG. 2 and subsequent figures. In the variant of FIG. 2, the required flow regulator 6 is provided with an additional control surface acting in the direction of increasing the stroke volume of the pump 2 and the signal tube 15a leads to this control surface. The signal pipe 15a is connected to the supply pipe 12 of the pump 13 at the initial position of the relief valve 14a. At the connection position of the relief valve 14a, the signal pipe 15a is connected to a pressureless storage container, and the supply pipe 12 is connected to a controller 11 (not shown). The load sensing pipe 5 is always connected to the regulator 6.

【００２６】図３の変化形では、図１及び図２の場合と
は異なり、３ポート２位置方向制御弁として構成された
逃し弁１４ｂが備えられ、この弁に、付加的に別の、ポ
ンプ２の供給管３から分岐した管２５が通じている。管
２５は、逃し弁１４ｂの初期位置では分岐管５′と接続
され、分岐管５′は、ポンプ２の行程容積増大方向に作
用する、所要流量調整器６の制御面に開口し、逃し弁１
４ｂの接続位置では、ロード・センシング管５と接続さ
れている。調整器６のロード・センシング側（ばね側）
にウォームアップ時に作用を与えることは、低圧区域で
作業するポンプ１３からではなく、高圧区域で作業する
ポンプ２によって行なわれる。The variant of FIG. 3 differs from the cases of FIGS. 1 and 2 in that it is provided with a relief valve 14b configured as a three-port two-position directional control valve, which additionally comprises another pump. A pipe 25 branched from the second supply pipe 3 communicates. The pipe 25 is connected to the branch pipe 5'in the initial position of the relief valve 14b, and the branch pipe 5'opens in the control surface of the required flow rate regulator 6 which acts in the direction of increasing the stroke volume of the pump 2 to release the relief valve. 1
It is connected to the load sensing pipe 5 at the connection position 4b. Adjuster 6 load sensing side (spring side)
The warming-up action is carried out not by the pump 13 working in the low-pressure area but by the pump 2 working in the high-pressure area.

【００２７】図４の変化形の場合、図１及び図２の場合
のように、ポンプ１３の供給管１２が、ウォームアップ
時に作用する第３信号を得るために設けられている。こ
の場合、逃し弁１４ｄは、同じく３ポート２位置方向制
御弁として構成され、別の機能を引受けることができ
る。ウォームアップ時にポンプ２の供給管３内に発生す
る供給圧が、通常の作業運転に定められている最大値に
達しないように、供給管３に接続された圧力制限弁９
に、第１絞り２６を間そうの上で第２の圧力制限弁２７
が並列接続されている。この弁は、図４に示されている
ように、有利には調節可能に構成されている。第２の圧
力制限弁２７の負荷接続部は、第１の弁９の負荷除去接
続部と接続されている。加えて、第２の弁２７の負荷接
続部からは管２８が分岐し、管２８は、第２の絞り２９
を間そうした上で逃し弁１４ｃへ通じている。逃し弁１
４ｃの初期位置では、ロード・センシング管５が中断さ
れる。分岐管５′はポンプ１３の供給管１２へ接続され
ている。管２８は、図２には示されていない制御器２２
の入口同様、無圧力の貯蔵容器に接続されている。圧力
制限弁９，２７及び絞り２６，２９の配置により、逃し
弁１４ｃの初期位置では、ポンプ２の供給管３内の圧力
は、通常、圧力制限弁９により設定される最大値より低
い値に制限される。その場合、双方の制限弁９，２７が
作用する。逃し弁１４ｃの接続位置では、これに反し、
管２８が遮断されるので、圧力制限弁９のみが作用す
る。In the variant of FIG. 4, as in the case of FIGS. 1 and 2, the supply pipe 12 of the pump 13 is provided to obtain a third signal which acts during warm-up. In this case, the relief valve 14d is also configured as a 3-port 2-position directional control valve and can assume another function. The pressure limiting valve 9 connected to the supply pipe 3 prevents the supply pressure generated in the supply pipe 3 of the pump 2 during warm-up from reaching the maximum value set for normal work operation.
The second pressure limiting valve 27 on the first throttle 26.
Are connected in parallel. This valve is preferably of adjustable construction, as shown in FIG. The load connection of the second pressure limiting valve 27 is connected to the load removal connection of the first valve 9. In addition, a pipe 28 branches off from the load connection of the second valve 27, which is connected to the second throttle 29.
And then leads to the relief valve 14c. Relief valve 1
At the initial position of 4c, the load sensing tube 5 is interrupted. The branch pipe 5 ′ is connected to the supply pipe 12 of the pump 13. Tube 28 is a controller 22 not shown in FIG.
Like the inlet, it is connected to a pressureless storage container. Due to the arrangement of the pressure limiting valves 9 and 27 and the throttles 26 and 29, the pressure in the supply pipe 3 of the pump 2 is usually lower than the maximum value set by the pressure limiting valve 9 at the initial position of the relief valve 14c. Limited. In that case, both restriction valves 9 and 27 operate. Contrary to this, at the connection position of the relief valve 14c,
Since the pipe 28 is blocked, only the pressure limiting valve 9 operates.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の方法を実施する装置例の第１変化形の
液圧回路図。FIG. 1 is a first modified hydraulic circuit diagram of an example of an apparatus for carrying out the method of the present invention.

【図２】第２変化形の液圧回路図で、図１の部分図。FIG. 2 is a second variation type hydraulic circuit diagram, which is a partial view of FIG. 1;

【図３】第３変化形の液圧回路図で図２同様の部分図。3 is a partial view similar to FIG. 2, showing a third variation of the hydraulic circuit diagram.

【図４】第４変化形の液圧回路図で、図２同様の部分
図。FIG. 4 is a fourth variation type hydraulic circuit diagram, which is a partial view similar to FIG. 2;

【符号の説明】[Explanation of symbols]

１ 内燃機関、 ２ 可変容量形ポンプ、 ３ 供給
管、 ４ 弁装置、 ５ロード・センシング管、 ６
所要流量調整器、 ８ 調節シリンダ、 ９，１０ 圧
力制限弁、 １１ 制御器、 １３ 補助定量形ポン
プ、 １４ 逃し弁、 １６ シャトル弁、 １７ 温
度センサ、 １８ ウォームアップ調整器、 １９ 比
較装置、 ２０ 加算器、 ２１ エネルギー供給管、
２２ バッテリ、 ２３ オンオフ・スイッチ、 ２
４ 演算増幅器、 ２７ 第２圧力制限弁、 ２６，２
９ 絞り1 internal combustion engine, 2 variable displacement pump, 3 supply pipe, 4 valve device, 5 load sensing pipe, 6
Required flow rate regulator, 8 adjusting cylinder, 9,10 Pressure limiting valve, 11 Controller, 13 Auxiliary metering pump, 14 Relief valve, 16 Shuttle valve, 17 Temperature sensor, 18 Warm-up regulator, 19 Comparison device, 20 Addition Vessel, 21 energy supply pipe,
22 battery, 23 on / off switch, 2
4 operational amplifier, 27 2nd pressure limiting valve, 26, 2
9 aperture

Claims (12)

【特許請求の範囲】[Claims] 【請求項１】 液圧回路内の圧力媒体をウォームアップ
する方法であって、圧力が形成され、特定圧力レベルに
達した場合に、圧力媒体が、少なくとも１つの圧力制御
弁を介して、より低い圧力レベルに引下げられる形式の
ものにおいて、圧力媒体及び又は構成部品の少なくとも
１つの、液圧回路内での温度が継続的に測定され、かつ
ウォームアップ措置が、限界温度に達するまで強制的に
行なわれることを特徴とする、液圧回路内の圧力媒体を
ウォームアップする方法。1. A method for warming up a pressure medium in a hydraulic circuit, wherein the pressure medium is passed through at least one pressure control valve when the pressure builds up and reaches a certain pressure level. In the form of being lowered to a low pressure level, the temperature of the pressure medium and / or of at least one of the components in the hydraulic circuit is continuously measured and the warm-up measures are forced until the limit temperature is reached. A method of warming up a pressure medium in a hydraulic circuit, which is performed. 【請求項２】 静液圧式可変容量形ポンプの供給量が、
所要流量調整器により規制され、供給圧力に応じて第１
の信号が、また消費器の圧力に応じて第２の信号が、所
要流量調整器（６）に送られ、更に、限界温度に達する
まで、第３の、第２信号と等方向に作用する信号が所要
流量調整器に送られ、可変容量形ポンプ（２）が、行程
容積増加の方向に調節されることを特徴とする、請求項
１記載の方法。2. The supply amount of the hydrostatic variable displacement pump is
It is regulated by the required flow rate regulator, and the first
, And a second signal depending on the pressure of the consumer are sent to the required flow regulator (6) and then act in the same direction as the third and second signals until the limit temperature is reached. 2. The method according to claim 1, characterized in that a signal is sent to the required flow regulator and the variable displacement pump (2) is adjusted in the direction of the stroke volume increase. 【請求項３】 液圧回路が、ウォームアップの間は部分
負荷使用されることを特徴とする、請求項１又は２記載
の方法。3. Method according to claim 1, characterized in that the hydraulic circuit is used part-load during warm-up. 【請求項４】 液圧ポンプが内燃機関（１）により駆動
され、この内燃機関（１）が、液圧回路の全負荷時に予
定された使用回転数に比して、より低い回転数で使用さ
れることを特徴とする、請求項１から３までのいずれか
１項記載の方法。4. The hydraulic pump is driven by an internal combustion engine (1), which is used at a lower rotational speed than the intended rotational speed when the hydraulic circuit is fully loaded. Method according to any one of claims 1 to 3, characterized in that it is performed. 【請求項５】 温度上昇につれて内燃機関（１）の回転
数が増加することを特徴とする、請求項４記載の方法。5. A method according to claim 4, characterized in that the rotational speed of the internal combustion engine (1) increases with increasing temperature. 【請求項６】 液圧回路内の圧力媒体をウォームアップ
する装置であって、液圧回路が、静液圧式の可変容量形
ポンプと、このポンプに接続された少なくとも１つの消
費器と、所要流量調整器を有し、この調整器が、前記ポ
ンプの供給圧に応じて発せられる第１の信号と、消費器
圧力に応じて発せられる第２信号とにより制御される形
式のものにおいて、ウォームアップ調整器（１８）が、
所要流量調整器（６）と作用接続されており、また調整
器（１８）には、入口側に圧力媒体及び又は構成部品の
少なくとも１つの、液圧回路内での温度を測定する温度
センサ（１７）が接続され、かつ限界温度値を記憶させ
た比較装置（１９）が備えられており、しかも、限界温
度以下では所要流量調整器（６）に対して第３の信号が
可変容量形ポンプ（２）の行程容積拡張の方向に作用す
ることを特徴とする、液圧回路内の圧力媒体をウォーム
アップする装置。6. A device for warming up a pressure medium in a hydraulic circuit, the hydraulic circuit comprising: a hydrostatic variable displacement pump; and at least one consumer connected to the pump. A worm of the type having a flow regulator, the regulator being controlled by a first signal emitted in response to a supply pressure of the pump and a second signal emitted in response to a consumer pressure. Up adjuster (18)
A temperature sensor (operatively connected to the required flow regulator (6) and to the regulator (18) for measuring the temperature in the hydraulic circuit of at least one of the pressure medium and / or the component on the inlet side ( 17) is connected, and a comparison device (19) for storing a limit temperature value is provided, and when the temperature is equal to or lower than the limit temperature, the third signal to the required flow rate regulator (6) is a variable displacement pump. (2) A device for warming up a pressure medium in a hydraulic circuit, which operates in the direction of expansion of the stroke volume. 【請求項７】 補助定容量形ポンプに、消費器を制御す
る制御器が接続されており、このポンプ（１３）の供給
管（１２）の途中に配置され、限界温度到達時にばね力
に抗して初期位置から接続位置へ切換可能な逃し弁（１
４，１４ａ，１４ｂ，１４ｃ）の作用接続が形成され、
これらの逃し弁を、ウォームアップ調整器（１８）によ
り接続位置方向へ負荷可能であり、そのさい逃し弁（１
４，１４ａ，１４ｂ，１４ｃ）の初期位置ではポンプ
（１３）と制御器（１１）との接続が中断され、第３信
号が案内される信号管（１５，５′，１５ａ）と所要流
量調整器（６）との接続が形成され、更に逃し弁（１
４，１４ａ，１４ｂ，１４ｃ）の接続位置ではポンプ
（１３）が制御器（１１）と接続され、信号管（１５，
５′，１５ａ）が遮断されることを特徴とする、請求項
６記載の装置。7. A controller for controlling a consumer is connected to the auxiliary constant displacement pump, which is arranged in the middle of a supply pipe (12) of the pump (13) and resists a spring force when a limit temperature is reached. Then, the relief valve (1
4, 14a, 14b, 14c) are formed,
These relief valves can be loaded toward the connecting position by a warm-up regulator (18), and the relief valves (1
4, 14a, 14b, 14c), the connection between the pump (13) and the controller (11) is interrupted in the initial position, and the signal pipe (15, 5 ', 15a) through which the third signal is guided and the required flow rate adjustment A connection is made with the device (6) and the relief valve (1
4, 14a, 14b, 14c), the pump (13) is connected to the controller (11), and the signal pipe (15,
7. Device according to claim 6, characterized in that 5 ', 15a) is interrupted. 【請求項８】 逃し弁（１４）の初期位置では定容量形
ポンプ（１３）の供給管（１２）がシャトル弁（１６）
の第１入口と接続されており、シャトル弁の第２入口
が、消費器圧力が負荷される管（５）に接続されてお
り、更にシャトル弁の出口が、可変容量形ポンプ（２）
の供給量増加方向に作用する、所要流量調整器(６)の制
御面と接続されていることを特徴とする、請求項７記載
の装置。8. In the initial position of the relief valve (14), the supply pipe (12) of the constant displacement pump (13) is a shuttle valve (16).
Connected to the first inlet of the shuttle valve, the second inlet of the shuttle valve is connected to the pipe (5) loaded with the consumer pressure, and the outlet of the shuttle valve is connected to the variable displacement pump (2).
8. Device according to claim 7, characterized in that it is connected to the control surface of the required flow regulator (6) which acts in the direction of increasing the supply of. 【請求項９】 所要流量調整器（６）が、可変流量形ポ
ンプ（２）の供給量増加方向に作用する付加的な制御面
を有し、この制御面へは逃し弁（１４ａ）と接続された
信号管（１５ａ）が通じており、この信号管が、逃し弁
（１４ａ）の初期位置ではポンプ（１３）の供給管（１
２）と接続され、逃し弁（１４ａ）の接続位置では排出
管と接続されることを特徴とする、請求項７記載の装
置。9. The required flow regulator (6) has an additional control surface acting in the direction of increasing the supply of the variable flow pump (2), to which the relief valve (14a) is connected. The signal pipe (15a) connected to the pump is connected to the supply pipe (1) of the pump (13) at the initial position of the relief valve (14a).
Device according to claim 7, characterized in that it is connected to 2) and to the discharge pipe at the connection position of the relief valve (14a). 【請求項１０】 逃し弁（１４ｂ）の初期位置では、信
号管（５′）が、ポンプ（２）の供給圧を案内する管と
接続され、逃し弁（１４ｂ）の接続位置では消費器圧力
を案内する管（５）と接続されることを特徴とする、請
求項７記載の装置。10. In the initial position of the relief valve (14b), the signal pipe (5 ') is connected with a pipe for guiding the supply pressure of the pump (2), and in the connection position of the relief valve (14b) the consumer pressure is connected. Device according to claim 7, characterized in that it is connected with a tube (5) for guiding the. 【請求項１１】 ポンプ（２）の供給圧を負荷される管
の途中に圧力制限弁（９）が配置されており、この圧力
制限弁（９）には、第１の絞り（２６）を間そうの上で
第２の圧力制限弁（２７）が並列接続されており、その
さい第１の圧力制限弁（９）が負荷除去接続部を有し、
この接続部が第２圧力制限弁（２７）の負荷接続部と接
続されており、かつ負荷除去接続部からは逃し弁（１４
ｃ）へ通じる管（２８）が分岐しており、この管（２
８）の途中には第２の絞り（２９）が配置され、かつ管
（２８）が逃し弁（１４ｃ）の初期位置では排出管と接
続され、逃し弁（１４ｃ）の接続位置では遮断されるこ
とを特徴とする、請求項８から１１までのいずれか１項
記載の装置。11. A pressure limiting valve (9) is arranged in the middle of a pipe to which a supply pressure of a pump (2) is loaded, and the pressure limiting valve (9) is provided with a first throttle (26). A second pressure limiting valve (27) is connected in parallel above the spacer, the first pressure limiting valve (9) then having a load removal connection,
This connection is connected to the load connection of the second pressure limiting valve (27), and the relief valve (14
The pipe (28) leading to c) is branched, and this pipe (2)
A second throttle (29) is arranged in the middle of 8), and the pipe (28) is connected to the discharge pipe at the initial position of the relief valve (14c) and is blocked at the connection position of the relief valve (14c). Device according to any one of claims 8 to 11, characterized in that 【請求項１２】 比較装置（１９）には２つのインプッ
トを有する加算素子（２０）が後置され、その一方のイ
ンプットには比較装置のアウトプットが、他方のインプ
ットには任意に操作可能のオンオフ・スイッチ（２３）
が接続されていることを特徴とする、請求項７から１１
までのいずれか１項記載の装置。12. The comparator device (19) is followed by a summing element (20) having two inputs, one input of which is the output of the comparator device and the other of which is arbitrarily operable. On-off switch (23)
Are connected to each other.
The apparatus according to claim 1.
JP4285846A 1991-10-23 1992-10-23 Warming up of pressure media in hydraulic circuit and its device Pending JPH05202911A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4135016.2 1991-10-23
DE4135016A DE4135016A1 (en) 1991-10-23 1991-10-23 Heating system for pressure medium in hydraulic circuit - uses continuous measurement of temp. of pressure medium and/or part of circuit

Publications (1)

Publication Number Publication Date
JPH05202911A true JPH05202911A (en) 1993-08-10

Family

ID=6443271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4285846A Pending JPH05202911A (en) 1991-10-23 1992-10-23 Warming up of pressure media in hydraulic circuit and its device

Country Status (2)

Country Link
JP (1) JPH05202911A (en)
DE (1) DE4135016A1 (en)

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DE4431951A1 (en) * 1994-09-08 1996-03-14 Same Spa Hydraulic system
US5666807A (en) * 1995-12-13 1997-09-16 Caterpillar Inc. Oil processor circuit
US7614223B2 (en) 2007-03-30 2009-11-10 Clark Equipment Company Method for operating a multiple speed hydraulic motor
FR2929240B1 (en) * 2008-03-25 2010-06-18 Airbus France SYSTEM AND METHOD FOR HEATING THE HYDRAULIC FLUID OF AN AIRCRAFT
JP5586543B2 (en) * 2011-09-08 2014-09-10 株式会社クボタ Working machine hydraulic system
CN103089757B (en) * 2013-01-29 2015-03-18 三一汽车制造有限公司 Closed hydraulic loop hot oil displacement system and concrete pumping device
NL2017106B1 (en) * 2016-07-05 2017-06-13 Fugro N V Unmanned underwater vehicle and method for controlling hydraulic system
RU2767256C1 (en) * 2020-10-07 2022-03-17 Публичное акционерное общество "Уральский завод тяжелого машиностроения" Hydraulic system with the hydraulic motor heating function

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WO2010025354A2 (en) * 2008-08-29 2010-03-04 Caterpillar Inc. Machine control system having hydraulic warmup procedure
WO2010025354A3 (en) * 2008-08-29 2010-06-03 Caterpillar Inc. Machine control system having hydraulic warmup procedure
US8234860B2 (en) 2008-08-29 2012-08-07 Caterpillar Inc. Machine control system having hydraulic warmup procedure
JP2015190581A (en) * 2014-03-28 2015-11-02 株式会社クボタ Hydraulic system of work machine
US9803333B2 (en) 2014-03-28 2017-10-31 Kubota Corporation Hydraulic system for working machine

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