GB1509991A - Hydraulic system for operation of a winch - Google Patents

Hydraulic system for operation of a winch

Info

Publication number
GB1509991A
GB1509991A GB6074/75A GB607475A GB1509991A GB 1509991 A GB1509991 A GB 1509991A GB 6074/75 A GB6074/75 A GB 6074/75A GB 607475 A GB607475 A GB 607475A GB 1509991 A GB1509991 A GB 1509991A
Authority
GB
United Kingdom
Prior art keywords
valve
motors
pressure
maximum
return line
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
GB6074/75A
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.)
BERGENS MEK VERKSTED
Original Assignee
BERGENS MEK VERKSTED
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 BERGENS MEK VERKSTED filed Critical BERGENS MEK VERKSTED
Publication of GB1509991A publication Critical patent/GB1509991A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

1509991 Hydrostatic transmission control BERGENS MEKANISKE VERKSTEDER AS 13 Feb 1975 [21 Feb 1974] 6074/75 Heading F2W In a hydrostatic transmission for a winch wherein a pair of fixed displacement pumps 1a, 1b delivers through a reversing and throttle valve 3 to four dual capacity motors 2a, 2b, 2c, 2d connected in parallel and driving a common output shaft 37, valves 21a, 21b, 21c, 21d selectively connect the motors to the pumps and selectively determine the capacity of at least one of the motors to provide eight speed ratios. A pressure reducing valve 4 controlled in response to pump delivery pressure throttles the return line when the motors tend to overrun the pumps during load lowering. The braking effect on the motors is limited by a by-pass valve 6 controlled by pilot valves 7, 8 and 9. The pressure in the line having the higher pressure is transmitted through a shuttle valve 35 to the valves 6, 7. When the pressure exceeds a predetermined maximum value the valve 7 opens and permits the valve 6 to open and thus limit the pressure to the predetermined value for maximum driving torque as maximum braking. The valve 8 is responsive to return line pressure and opens when the latter exceed a predetermined value lower than the maximum predetermined value. When the valve 8 is open the valve 6 limits the overrun braking. When the valve 9 is open the valve 6 opens to permit unrestricted overrun of the motors. If during load lowering the output shaft speed exceeds 140 r.p.m. a pulse generator 30, 31 energizes a relay 32 to actuate a signal 34 and if the speed exceeds 150 r.p.m. the relay actuates a valve 33 to disconnected the return line pressure from the valve 8 which closes and thereafter maximum braking inder the control of the valve 7 is applied to the motors. When the reversing valve 3 is moved to its central neutral position the return line pressure is disconnected from the valve 8 which closes for maximum braking of the motors.
GB6074/75A 1974-02-21 1975-02-13 Hydraulic system for operation of a winch Expired GB1509991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO740589A NO154491B (en) 1974-02-21 1974-02-21 HYDRAULIC SYSTEM FOR OPERATING A WINCH.

Publications (1)

Publication Number Publication Date
GB1509991A true GB1509991A (en) 1978-05-10

Family

ID=19881465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6074/75A Expired GB1509991A (en) 1974-02-21 1975-02-13 Hydraulic system for operation of a winch

Country Status (12)

Country Link
JP (1) JPS50118449A (en)
CA (1) CA1032444A (en)
DE (1) DE2507029C3 (en)
DK (1) DK63375A (en)
ES (1) ES434911A1 (en)
FI (1) FI65973C (en)
FR (1) FR2261970B1 (en)
GB (1) GB1509991A (en)
IT (1) IT1031958B (en)
NL (1) NL7502007A (en)
NO (1) NO154491B (en)
SE (1) SE400265B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146101A (en) * 1983-07-20 1985-04-11 Joseph Henry Sparkes Variable speed/torque hydraulic transmission system
CN102748333A (en) * 2012-07-06 2012-10-24 上海中联重科桩工机械有限公司 Hydraulic motor control system and full-hydraulic walking type pile driving frame
CN106155126A (en) * 2015-04-14 2016-11-23 常州市汇丰船舶附件制造有限公司 Gases at high pressure integrated form pressure-reduction module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136855A (en) * 1976-12-03 1979-01-30 The Manitowoc Company Inc. Hoist drum drive control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518512Y2 (en) * 1971-08-09 1976-03-06

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146101A (en) * 1983-07-20 1985-04-11 Joseph Henry Sparkes Variable speed/torque hydraulic transmission system
CN102748333A (en) * 2012-07-06 2012-10-24 上海中联重科桩工机械有限公司 Hydraulic motor control system and full-hydraulic walking type pile driving frame
CN102748333B (en) * 2012-07-06 2015-04-29 上海中联重科桩工机械有限公司 Hydraulic motor control system and full-hydraulic walking type pile driving frame
CN106155126A (en) * 2015-04-14 2016-11-23 常州市汇丰船舶附件制造有限公司 Gases at high pressure integrated form pressure-reduction module
CN106155126B (en) * 2015-04-14 2022-09-23 常州市汇丰船舶附件制造有限公司 High-pressure gas integrated pressure reduction module

Also Published As

Publication number Publication date
NL7502007A (en) 1975-08-25
DK63375A (en) 1975-10-27
FR2261970B1 (en) 1978-12-29
FI750474A (en) 1975-08-22
NO154491B (en) 1986-06-23
DE2507029A1 (en) 1975-09-04
CA1032444A (en) 1978-06-06
FI65973B (en) 1984-04-30
DE2507029B2 (en) 1979-05-31
FR2261970A1 (en) 1975-09-19
DE2507029C3 (en) 1980-01-31
ES434911A1 (en) 1976-12-16
SE7501876L (en) 1975-08-22
FI65973C (en) 1984-08-10
NO740589L (en) 1975-08-22
SE400265B (en) 1978-03-20
JPS50118449A (en) 1975-09-17
IT1031958B (en) 1979-05-10

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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