GB1401374A - Apparatus for damping the pressure increase of hydrostatic drives - Google Patents

Apparatus for damping the pressure increase of hydrostatic drives

Info

Publication number
GB1401374A
GB1401374A GB686173A GB686173A GB1401374A GB 1401374 A GB1401374 A GB 1401374A GB 686173 A GB686173 A GB 686173A GB 686173 A GB686173 A GB 686173A GB 1401374 A GB1401374 A GB 1401374A
Authority
GB
United Kingdom
Prior art keywords
pump
oil
valve
line
servomotor
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.)
Expired
Application number
GB686173A
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.)
Putzmeister Interholding GmbH
Original Assignee
Putzmeister Interholding 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 Putzmeister Interholding GmbH filed Critical Putzmeister Interholding GmbH
Publication of GB1401374A publication Critical patent/GB1401374A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/433—Pump capacity control by fluid pressure control means
    • 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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4183—Preventing or reducing vibrations or noise, e.g. avoiding cavitations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/465—Automatic regulation in accordance with output requirements for achieving a target input speed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Fluid Gearings (AREA)
  • Control Of Transmission Device (AREA)

Abstract

1401374 Fluid-pressure servomotor systems PUTZMEISTER-INTERHOLDING GmbH 12 Feb 1973 [22 Feb 1972] 6861/73 Heading G3P [Also in Division F2] A hydraulic transmission system comprising a swash-plate pump 1 connected to a motor through high and low pressure oil lines 2, 3 includes a pilot valve 10 controlling a swash-plate adjusting servomotor 8, and a piston and cylinder device 13 in the positioning linkage of valve 10, device 13 being connected to low pressure oil line 3 via non-return valve 16. Thus a sudden drop in pressure in line 3 as a result of increased load on the motor causes valve 16 to open and oil to flow under the action of spring 17 from device 13 into line 3 to prevent cavitation in pump 1. Oil also flows to line 3 from servomotor 8 via valve 18. Simultaneously output of pump 1 is reduced by the resulting adjustment of the swash-plate. In the arrangement shown the position of the piston within device 13 is controlled by oil pressure from an auxiliary pump 14 driven at the same speed as pump 1 and which is also connected to line 3 via valve 16, a regulation throttle 15 being provided. Device 13 may include a manual adjusting lever. A boost pump 5 is connected to lines 2, 3 via non-return valves 7 and also supplies control oil to servomotor 8. The latter includes a feedback link 20.
GB686173A 1972-02-22 1973-02-12 Apparatus for damping the pressure increase of hydrostatic drives Expired GB1401374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2208172A DE2208172C3 (en) 1972-02-22 1972-02-22 Device for damping the load-related pressure increase in hydrostatic drives

Publications (1)

Publication Number Publication Date
GB1401374A true GB1401374A (en) 1975-07-16

Family

ID=5836660

Family Applications (1)

Application Number Title Priority Date Filing Date
GB686173A Expired GB1401374A (en) 1972-02-22 1973-02-12 Apparatus for damping the pressure increase of hydrostatic drives

Country Status (15)

Country Link
US (1) US3854847A (en)
JP (1) JPS589301B2 (en)
AR (1) AR198072A1 (en)
AU (1) AU5230473A (en)
BR (1) BR7301293D0 (en)
CA (1) CA983815A (en)
CH (1) CH561869A5 (en)
CS (1) CS170452B2 (en)
DE (1) DE2208172C3 (en)
ES (1) ES411597A1 (en)
FR (1) FR2173565A5 (en)
GB (1) GB1401374A (en)
IT (1) IT977429B (en)
SU (1) SU466678A3 (en)
ZA (1) ZA731047B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050318A2 (en) * 1980-10-17 1982-04-28 Hitachi Construction Machinery Co., Ltd. Control method and control system for hydrostatic drive system
CN103557197A (en) * 2013-11-21 2014-02-05 无锡市蓝力机床有限公司 Oil quick-returning-discharging circuit for oil cylinder of hydraulic machine
CN112901339A (en) * 2021-01-15 2021-06-04 河北工业大学 Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017219A (en) * 1975-12-22 1977-04-12 Abex Corporation Control system for variable displacement pumps
JPS5387401U (en) * 1976-12-20 1978-07-18
US4373865A (en) * 1981-02-10 1983-02-15 Tadeusz Budzich Reciprocating controls of a hydraulically driven piston gas compressor
US4527393A (en) * 1981-09-02 1985-07-09 General Signal Corporation Control device for a hydrostatic transmission
US4434616A (en) * 1981-10-23 1984-03-06 Fmc Corporation Hydraulic winch speed control with pressure-responsive override
DE3143539A1 (en) * 1981-11-03 1983-05-11 Linde Ag, 6200 Wiesbaden CONTROL DEVICE FOR A CONTINUOUSLY ADJUSTABLE, PREFERABLY HYDROSTATIC GEARBOX
US4483663A (en) * 1982-08-23 1984-11-20 Sundstrand Corporation Output speed droop compensating pump control
DE3340332C2 (en) * 1983-11-08 1988-11-10 Hydromatik GmbH, 7915 Elchingen Power control device for a hydrostatic drive with flow rate adjustment
DE3436960A1 (en) * 1984-10-09 1986-04-17 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München SERVICE BRAKE FOR A TRUCK OR OMNIBUS
US5205201A (en) * 1991-08-19 1993-04-27 Sauer, Inc. Displacement control valve
DE10219849B4 (en) 2002-05-03 2004-03-25 Brueninghaus Hydromatik Gmbh Hydraulic motor unit
CN104728094B (en) * 2013-12-19 2016-06-08 北汽福田汽车股份有限公司 A kind of power transfer system and the concrete conveyer with described system
DE102014206460B3 (en) 2014-04-03 2015-07-23 Danfoss Power Solutions Gmbh & Co. Ohg Switchable hydrostatic adjusting device and associated control piston
CN106640576B (en) * 2016-12-09 2019-01-15 柳州职业技术学院 A kind of unload-type independent variable radial plunger pump
CN109899333B (en) * 2019-03-29 2020-06-02 潍柴动力股份有限公司 Valve block, hydraulic control system and vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1590694A (en) * 1968-09-20 1970-04-20
US3543508A (en) * 1968-10-16 1970-12-01 Hyster Co Hydrostatic transmission with pressure control
US3660975A (en) * 1970-09-17 1972-05-09 Lucas Industries Ltd Hydrostatic transmission systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050318A2 (en) * 1980-10-17 1982-04-28 Hitachi Construction Machinery Co., Ltd. Control method and control system for hydrostatic drive system
EP0050318A3 (en) * 1980-10-17 1983-03-16 Hitachi Construction Machinery Co., Ltd. Control method and control system for hydrostatic drive system
CN103557197A (en) * 2013-11-21 2014-02-05 无锡市蓝力机床有限公司 Oil quick-returning-discharging circuit for oil cylinder of hydraulic machine
CN103557197B (en) * 2013-11-21 2015-11-11 无锡市蓝力机床有限公司 Oil quick-returning-disccircuit circuit for oil cylinder of hydraulic machine
CN112901339A (en) * 2021-01-15 2021-06-04 河北工业大学 Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof
CN112901339B (en) * 2021-01-15 2022-04-26 河北工业大学 Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof

Also Published As

Publication number Publication date
DE2208172A1 (en) 1973-09-06
AR198072A1 (en) 1974-05-31
ES411597A1 (en) 1976-01-01
FR2173565A5 (en) 1973-10-05
AU5230473A (en) 1974-08-22
US3854847A (en) 1974-12-17
DE2208172B2 (en) 1973-12-13
CS170452B2 (en) 1976-08-27
BR7301293D0 (en) 1974-05-16
CH561869A5 (en) 1975-05-15
SU466678A3 (en) 1975-04-05
ZA731047B (en) 1973-11-28
CA983815A (en) 1976-02-17
DE2208172C3 (en) 1974-07-11
IT977429B (en) 1974-09-10
JPS589301B2 (en) 1983-02-19
JPS48103961A (en) 1973-12-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee