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1. 发明专利

JPS61104177A Matching controller for plurality of variable-capacity pumps 失效
标题翻译：匹配控制器的可变容量泵的多样性
公开(公告)号：JPS61104177A
公开(公告)日：1986-05-22
申请号：JP22457884
申请日：1984-10-25
申请人： Kawasaki Heavy Ind Ltd
发明人： KAWABATA SACHIO , NAKAGAWA MASAYA
IPC分类号： F04B49/00 , F04B49/08 , G05D16/00
摘要： PURPOSE: To make servo valves compact and simple and simplify piping, by connecting the discharge ports of variable-capacity pumps to the servo valves through check valves, respectively, and connecting the downstream sides of the check valves to each other.
CONSTITUTION: The discharge ports of variable-capacity pumps 1, 1' are con nected to servo valves 8, 8' respectively for the pumps, through check valves 14, 14' which block a fluid from flowing back to the discharge ports. The down stream sides of the check valves 14, 14' are connected to each other through a pipe 17. As a result, each of the servo valves 8, 8' does not need a stepped pilot piston, and does need only one pressure chamber, regardless of the number of the pumps to be matched with each other. The servo valves are thus made compact and simple. Since the number of external pipes for connecting the pressure chambers of the servo valves is only equal to that of the pumps, piping is simplified.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过分别通过止回阀将可变容量泵的排出口连接到伺服阀，并将止回阀的下游侧相互连接，使伺服阀紧凑简单，简化管路。构成：可变容量泵1,1'的排放口分别连接到用于泵的伺服阀8,8'，通过阻止流体回流到排出口的止回阀14,14'。止回阀14,14'的下游侧通过管道17彼此连接。结果，每个伺服阀8,8'不需要阶梯式先导活塞，并且仅需要一个压力室，而不管彼此匹配的泵的数量。因此，伺服阀紧凑且简单。由于用于连接伺服阀的压力室的外部管道的数量仅等于泵的管道数量，所以管道简化。

2. 发明专利

JPS58110881A DEVICE FOR CONTROLLING VARIABLE CAPACITY PUMP 失效
公开(公告)号：JPS58110881A
公开(公告)日：1983-07-01
申请号：JP20906281
申请日：1981-12-25
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO , SATOU MASANOBU , OOHASHI MASAO , SAKAMOTO HIROKATSU
IPC分类号： F04B49/00 , F04B49/08
摘要： PURPOSE:To enable to use a prime mover in the full capacity thereof by a method wherein the discharging amount of the variable capacity pump is controlled in constant in accordance with the variation of the discharging pressure of the pump by the control device in which two sets of chokes and a reducing valve are combined. CONSTITUTION:When the discharging pressure Pd is increased, a pressure acting on the protuberance 44a of the first piston of the reducing valve 22 and the same acting on the spool 55 of the second choke 24 are increased, therefore, the spools 22, 55 are moved to the right. When the opening area of the second choke 24 is increased, the fluidic pressure of fourth path 37 is reduced and the pressure Pi acting on the first piston 44 of the reducing valve 22 is decreased. Accordingly, the piston 16 is moved to the right, a tilting lever 19 is moved to the direction reducing the titled angle thereof and the discharging amount of the variable capacity pump 1 is reduced, therefore, the discharging amount is controlled at constant value and the prime mover may be used in the full capacity thereof.

3. 发明专利

JPS58101277A CONTROL UNIT FOR VARIABLE DISPLACEMENT PUMP 失效
公开(公告)号：JPS58101277A
公开(公告)日：1983-06-16
申请号：JP19766381
申请日：1981-12-10
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO , SATOU MASANOBU , OOHASHI MASAO
IPC分类号： F04B49/00 , F04B49/22
摘要： PURPOSE:To make motor output usable for hydraulic pressure without wastage, by controlling a pump with not only a signal of discharge pressure but also a step piston inducting a signal of discharge flow. CONSTITUTION:In accordance with variations in the discharge pressure of a first main pump 11, the pressure difference in front and in the rear of a first throttle valve 24 is controlled and then a servo valve 14 is controlled by pressure at the downstream of the first throttle valve 24. According to this case, the opening area of a second throttle valve 25 is controlled by the discharge pressure of the first main pump 11. In this control unit 26, discharge flow is controlled so as to become adjusted to the preset, specified horsepower in accordance with variations in the discharge pressure of the first main pump 11, and the setting horsepower value of said first main pump is changed with the opening area of the first throttle valve 24 changed. That is to say, with the first throttle valve 24 displaced by a piston 19 of a control unit 20, horsepower limitation excellent in a degree of approximation can be achieved.

4. 发明专利

JP2000097147A AXIAL PISTON PUMP 失效
公开(公告)号：JP2000097147A
公开(公告)日：2000-04-04
申请号：JP2774799
申请日：1999-02-04
申请人： KAWASAKI HEAVY IND LTD
发明人： UMEDA TOKIHIKO , KAWABATA SACHIO , MATSUDA NORIHIDE , SAKAI RYUJI
IPC分类号： F04B27/08 , F04B1/20 , F04B1/22 , F04B53/00
摘要： PROBLEM TO BE SOLVED: To reduce higher harmonic waves from the noise produced from the whole plurality of piston chambers by not only smoothing the pressure fluctuation curve in the individual piston chamber but also adjusting mutual step-up and step-down pressure timing in a plurality of piston chambers. SOLUTION: This axial piston pump is composed so that, when pressure in a certain piston chamber reaches the pressure in discharge port T, openings of other piston chambers start to lie on top of the other openings L2, and when pressure in a certain piston chamber reaches the pressure in a suction port S, openings of other piston chambers start to lie on top of the other openings L1.

5. 发明专利

JPH10274166A CONTROL DEVICE FOR VARIABLE VOLUME TYPE PUMP 失效
公开(公告)号：JPH10274166A
公开(公告)日：1998-10-13
申请号：JP8115197
申请日：1997-03-31
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO , MATSUDA NORIHIDE , SAKAI RYUJI
IPC分类号： F04B49/00 , F04B49/06 , F04B49/08
摘要： PROBLEM TO BE SOLVED: To provide a control device for a variable volume pump to precisely control a relief amount from an electromagnetic relief valve during control of a pressure to a value lower than a specified value. SOLUTION: A control device for a variable volume type pump to change a delivery flow rate of working oil by changing a variable element comprises a first feedback circuit 24 to control a pressure of working oil from a variable volume type pump: a second feedback circuit 24a; and a switch control means 88. A first feedback circuit 24 comprises a first pressure detecting means to detect a working pressure; a second pressure detecting means to detect the vent pressure of an electromagnetic relief valve; and a differential pressure computing circuit 122 to compute a differential pressure between the detecting pressures of first and second pressure detecting means. The switch control means 88 performs switch control such that a relief flow rate of working oil is decreased by utilizing a differential signal from the differential pressure computing circuit 122 when the detecting pressure of the first pressure detecting means is higher than a target pressure.

6. 发明专利

JPH0318040B2 失效
公开(公告)号：JPH0318040B2
公开(公告)日：1991-03-11
申请号：JP20906281
申请日：1981-12-25
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO , SATO MASANOBU , OOHASHI MASAO , SAKAMOTO HIROKATSU
IPC分类号： F04B49/00 , F04B49/08

7. 发明专利

JPS58163803A HYDRAULIC PRESSURE CONTROL DEVICE 失效
公开(公告)号：JPS58163803A
公开(公告)日：1983-09-28
申请号：JP4701682
申请日：1982-03-23
申请人： KAWASAKI HEAVY IND LTD
发明人： OOHASHI MASAO , KAWABATA SACHIO
IPC分类号： E02F9/22 , F15B11/17
摘要： PURPOSE:To prevent a time delay when a slant angle of a pump is increased, by disposing a constant differential pressure regulator communicating with a tank in one system and also disposing a shuttle valve connected to the regulator of a pump in the most downstream side of a pilot pressure-selection shuttle valve in another system. CONSTITUTION:A shuttle valve 80 is connected to a secondary port of shuttle valves 70, 75 connected to pressure regulators (49,50), (55,56) of a pilot valve 21 for joining in one hydraulic pressure control system, and is also connected to pump regulators 47, 48 in another control system through a constant differential pressure regulator 81. In said regulator 81, the secondary side port 93 communicates with a tank 68 when the primary side pressure is below the set pressure, while it shuts out this communication when the pressure exceeds the set pressure. Thus, a time delay during increasing the slant angle of a pump can be prevented.

8. 发明专利

JPS5898684A CONTROL DEVICE FOR VARIABLE CAPACITY PUMP 失效
公开(公告)号：JPS5898684A
公开(公告)日：1983-06-11
申请号：JP19559181
申请日：1981-12-07
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO
IPC分类号： F04B49/00 , F04B49/08
摘要： PURPOSE:To utilize a given horse power fully and efficiently by a method wherein the discharging pressure of another pump is acted on a relief valve as a pilot pressure. CONSTITUTION:When the discharging pressure of first main pump is introduced into a pilot chamber 50 and the same of the second main pump is introduced into another pilot chamber 52, a stepped piston 25 is pushed toward the right. At the same time, the pilot pressure is acting on a box hole 42 and the discharging pressure of the second main pump is acting on an annular recess 44, therefore, the stepped plunger 41 is pushed toward the right. Another stepped plunger 47 is abutting against a piston 48 for the relief valve and, whereby, the piston 48 is seated on a valve seat 37 and closes a flow path between a control flow path 19 and a tank. The position of a spring washer 49 is set by the same of the stepped piston 25.

9. 发明专利

JPH08303342A INCLINED SHAFT TYPE AXIAL PISTON MACHINE 失效
公开(公告)号：JPH08303342A
公开(公告)日：1996-11-19
申请号：JP10979795
申请日：1995-05-08
申请人： KAWASAKI HEAVY IND LTD
发明人： UMEDA TOKIHIKO , KAWABATA SACHIO , TSUNODA YOSHIHIRO
IPC分类号： F04B1/24
摘要： PURPOSE: To improve displacement efficiency by reducing the number of stocks using a displacement variable pump having one kind of structure and making intensive a number of sizes by means of a manual adjustment and a dead volume between a piston and a cylinder hole during the low inclined rotation of a cylinder block. CONSTITUTION: In a valve plate spherically brought into contact with the end of the cylinder head side of a cylinder block, a projecting circular arc surface is formed in a side opposite the cylinder block and supported in the recessed circular arc surface of a cover fixed to a housing. The center axial line 44 of this projecting circular arc surface includes the axial line 13 of a rotary shaft and the axial line 15 of a cylinder block 11, and within one plane in which an incline rotation angle is changed, this is decided in a position shifted from the axial line of the rotary shaft in the inclined rotational direction of the cylinder block. The tip part 52 of a screw rod 51 is brought into contact with the inclined rotational direction downstream side end of the valve plate and the valve plate is positioned and adjusted.

10. 发明专利

JPH08284840A CONTROLLER OF VARIABLE DISPLACEMENT PUMP 失效
公开(公告)号：JPH08284840A
公开(公告)日：1996-10-29
申请号：JP8294795
申请日：1995-04-07
申请人： KAWASAKI HEAVY IND LTD
发明人： KAWABATA SACHIO , UMEDA TOKIHIKO , MATSUDA NORIHIDE
IPC分类号： F04B49/06
摘要： PURPOSE: To hold the extent of discharge pressure in a pump stably and constantly irrespective of the flow rate by controlling the pressure of hydraulic fluid from this variable displacement pump with an electromagnetic relief valve, and also controlling this relief valve by means of a first negative feedback circuit. CONSTITUTION: A relief flow rate of hydraulic fluid by a pressure override characteristic in an electromagnetic relief valve 6 becomes smaller and thereby in order to make it become staying in and around the target pressure value in the vicinity of cracking pressure in this relief valve 6, a pressure compensating signal in a first negative feedback circuit 24 is deducted from a detecting flow signal of the hydraulic fluid fed from a pump 1, operating the value through subtraction or the like, and this operated result is imparted, as an input signal, to a second negative feedback circuit 24, varying those of variable elements including a swash plate or the like and controlling the flow rate, whereby it is used a new target quantity value. With this constitution, in this pressure control operating oil of the pump 1, such a possibility that relief flow out of the electromagnetic relief valve 6 might be turned to a large value is prevented, and also any wasteful flow rate is reducible as small as possible.

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