US2984965A - Drive arrangement for driving a rotatable member in short intervals at high and low speeds - Google Patents

Drive arrangement for driving a rotatable member in short intervals at high and low speeds Download PDF

Info

Publication number
US2984965A
US2984965A US671093A US67109357A US2984965A US 2984965 A US2984965 A US 2984965A US 671093 A US671093 A US 671093A US 67109357 A US67109357 A US 67109357A US 2984965 A US2984965 A US 2984965A
Authority
US
United States
Prior art keywords
driving
shaft
accumulator
motor
motor unit
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 - Lifetime
Application number
US671093A
Other languages
English (en)
Inventor
Lepoutre Raymond
Martin Georges Leandre
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.)
Raffineries & Sucreries Say So
Raffineries & Sucreries Say Ste
Original Assignee
Raffineries & Sucreries Say So
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 Raffineries & Sucreries Say So filed Critical Raffineries & Sucreries Say So
Application granted granted Critical
Publication of US2984965A publication Critical patent/US2984965A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/10—Control of the drive; Speed regulating

Definitions

  • the present invention relates to a driving arrangement for driving a rotatable member at high and low speed.
  • the arrangement according to the present invention may, for instance be applied to centrifugal driers having a hasket which is suspended on a vertical shaft and is driven by a motor.
  • the basket has to be charged and discharged at a reduced rotational speed but with a considerable driving torque, whilst the operations of bringing the basket to operational speed and braking the said basket should be carried out rapidly.
  • the currently known means for enabling these conditions to be fulfilled more or less completely are expensive and cannot be adapted to the equipment now actually in service.
  • the present invention has as its object more particularly to overcome these disadvantages and consists in adding to the usual motor a supplementary device whose power can be added to that of the normal motor.
  • this supplementary motor can also be used for braking the basket.
  • hydraulic device which is adapted to work either as a motor or as a pump, according to the needs of the user.
  • a coupling device will he provided between the usual motor and the supplementary device.
  • the basket 1 containing the material to be dried is suspended on the end of a substantially vertical shaft 2 and is arranged inside a tank 3.
  • a scraper 4 is mounted on the rod 5a of a jack 5 which is movable in a cylinder 5b.
  • a spring 50 tends to lift the jack 5, whilst a hydraulic control arrangement (not shown) is provided for moving the jack downwards.
  • the cylinder 5b is carried by a crossmember 8 which comprises a bearing 8a for the shaft 2 and which is prevented from rotating about the said shaft 2 by a stud 3a carried by the tank 3.
  • This cross-member 8 also carries a control device 9 for lifting the cone 1a when it is desired to empty the basket 1.
  • the crossmember 8, its connections with the cone 1a and the shaft 2 and its retention in position by the stud 3a have been described in detail in the French patent specification filed in the name of the present applicants on January 30, 1957, and entitled Drier of the Suspended Type.
  • the material to be dried is stored in a supply container 10, and is brought to a distributor 12 by a volumetric pump 11, for example as described in the French patent application filed on June 5, 1957, in the name of the present applicants and under the title Method of and Apparatus for Charging Driers of the Suspended Type.
  • a brake 13 controlled by any appropriate automatic or non-automatic means makes it possible to slow down Patented May 23, 1961 the rotational movement of the shaft 2 if necessary.
  • the said shaft is fast in a manner known per se with a hemispherical member 15 which bears on a dished member 15a fast with the frame of the machine, thus enabling the said shaft to oscillate about the centre of the said hemispherical member 15.
  • a dished member 1711 Fixed on the upper end of the said shaft 2 is a dished member 1711 which is driven through the intermediary of a driving member 17b by the shaft 20a of an electric motor 20.
  • the rotor of a pump-motor unit 22 is fixed on the shaft 20a.
  • the rotor of the pump-motor unit 22 can be coupled or uncoupled from the electric motor 20.
  • the admission and outlet conduits of the pump-motor unit 22 can be connected respectively by means of a distributor of known type 23, either to an accumulator 26 and to a tank 25, in the case where the unit 22 operates as a motor, or to the tank 25 and the accumulator 26 in the case where the unit 22 operates as a pump.
  • the method of operation is as follows:
  • the electric motor 20 is started up.
  • the two motors 2i) and 22 simultaneously drive the basket 1 and add their respective power to one another.
  • the basket 1 gradually reaches its operational speed.
  • the unit 22 operates as a pump and slows down the rotation of the basket 1.
  • the unit 22 When the rotational speed of the basket has slowed down sufficiently, after a short mechanical braking action if necessary, the unit 22 is re-started as a motor at a slow speed, so as to drive the basket 1 in rotational movement at a reduced speed and with a high torque. Discharging is then effected by lifting the cone 1a and starting up the scraper 4.
  • the pump-motor unit 22 is preferably of the volumetric hydraulic type, which permits:
  • the device according to the present invention can easily be mounted on an already existing apparatus.
  • a driving arrangement for rotating a rotatable memher at high and at low speed comprising, in combination, driving means for rotating said rotatable member during high speed operation and inoperative during low speed operation; a hydraulic pump-motor unit having an inlet and an outlet, and being connectible to said rotatable member for driving or retarding rotation thereof; a hydraulic accumulator; a hydraulic fluid supply; means for selectively connecting said accumulator to said inlet and said fluid supply to said outlet of said hydraulic pumpmotor unit and vice versa, whereby upon discontinuing operation of said driving means said accumulator may be connected to the outlet and said fluid supply to the inlet of said hydraulic pump-motor unit so as to cause charging of said accumulator and consequent retarding of rotation of said rotatable member, and said accumulator when charged may be connected to the inlet and said fluid supply to the outlet of said hydraulic pump-motor unit so as to cause driving of said rotatable member by said hydraulic pump-motor unit while said accumulator is discharged and coupling means for connecting and disconnecting said hydraulic pump-motor
  • a driving arrangement for a rotatable member which has to be started and stopped in short intervals and which has to be operated at high and at low speed comprising, in combination, a shaft on which the rotatable member is mounted to be rotated thereby; driving means operatively connected to said shaft for driving the same during high speed operation and inoperative during low speed operation; a hydraulic pump-motor unit having an inlet and outlet; a hydraulic accumulator; a hydraulic fluid supply; means for selectively connecting said accumulator to said inlet and said fluid supply to said outlet of said hydraulic pump-motor unit and vice versa, whereby said accumulator may be connected to said inlet and said fluid supply to said outlet so that the shaft may be driven at slow speed by said pump-motor unit when operation of said drive means is discontinued or at high speed when said drive means is operated, and upon discontinuing of operation of said drive means said accumulator maybe connected to said outlet and said fluid supply to said inlet of said hydraulic pump-motor unit so as to cause charging of said accumulator and retarding of rotation of said shaft while said hydraulic
  • a driving arrangement for a' rotatable member which has to be started and stopped in short intervals and which has to be operated at high and at low speed comprising, in combination, a vertical shaft on which the rotatable member is suspended to be rotated thereby; an electric motor having a rotor concentrically arranged with and operatively connected to said shaft for driving the same during high speed operation and inoperative during low speed operation; a hydraulic pump-motor unit arranged concentrically with said shaft above said electric motor and having an inlet and outlet; a hydraulic accumulator; a hydraulic fluid supply; means for selectively connecting said accumulator to said inlet and said fluid supply to said outlet of said hydraulic pump-motor unit and vice versa, whereby said accumulator may be 7 connected to said inlet and said fluid supply to said outlet so that the shaft may be driven at slow speed by said pump-motor unit when operation of said electric motor is discontinued or at high speedwhen said electric motor is operated, and upon discontinuing of operation of said electric motor said accumulator may be connected to said outlet and said fluid supply to

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
US671093A 1957-06-14 1957-07-10 Drive arrangement for driving a rotatable member in short intervals at high and low speeds Expired - Lifetime US2984965A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR343291X 1957-06-14

Publications (1)

Publication Number Publication Date
US2984965A true US2984965A (en) 1961-05-23

Family

ID=8892091

Family Applications (1)

Application Number Title Priority Date Filing Date
US671093A Expired - Lifetime US2984965A (en) 1957-06-14 1957-07-10 Drive arrangement for driving a rotatable member in short intervals at high and low speeds

Country Status (4)

Country Link
US (1) US2984965A (en(2012))
BE (1) BE568559A (en(2012))
CH (1) CH343291A (en(2012))
LU (1) LU36173A1 (en(2012))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141846A (en) * 1962-04-05 1964-07-21 Western States Machine Co Load control unit for cyclical centrifugal installation
US3738490A (en) * 1971-06-04 1973-06-12 Globe Union Inc Industrial-type variable-speed centrifuge
US3844949A (en) * 1972-05-19 1974-10-29 Fives Lille Cail Centrifugal drier
US20120317966A1 (en) * 2009-12-23 2012-12-20 Robert Bosch Gmbh Hydraulic arrangement

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112430A (en) * 1936-04-13 1938-03-29 American Tool & Machine Co Double drive for centrifugal separators
US2181741A (en) * 1937-10-04 1939-11-28 Gen Electric Prime mover control system
US2306625A (en) * 1942-12-29 Hydraulic centrifuge
US2554381A (en) * 1948-01-14 1951-05-22 Jr Joseph C Patterson Ship roll energy device
US2553584A (en) * 1947-12-29 1951-05-22 Hirsch Joseph Apparatus for rapidly accelerating a shaft
US2671635A (en) * 1950-05-25 1954-03-09 Baldwin Lima Hamilton Corp Reversible pump-turbine
US2687280A (en) * 1954-08-24 Pump-turbine
US2827763A (en) * 1955-05-20 1958-03-25 Jaroco Engineering Co Hydraulic system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306625A (en) * 1942-12-29 Hydraulic centrifuge
US2687280A (en) * 1954-08-24 Pump-turbine
US2112430A (en) * 1936-04-13 1938-03-29 American Tool & Machine Co Double drive for centrifugal separators
US2181741A (en) * 1937-10-04 1939-11-28 Gen Electric Prime mover control system
US2553584A (en) * 1947-12-29 1951-05-22 Hirsch Joseph Apparatus for rapidly accelerating a shaft
US2554381A (en) * 1948-01-14 1951-05-22 Jr Joseph C Patterson Ship roll energy device
US2671635A (en) * 1950-05-25 1954-03-09 Baldwin Lima Hamilton Corp Reversible pump-turbine
US2827763A (en) * 1955-05-20 1958-03-25 Jaroco Engineering Co Hydraulic system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141846A (en) * 1962-04-05 1964-07-21 Western States Machine Co Load control unit for cyclical centrifugal installation
US3738490A (en) * 1971-06-04 1973-06-12 Globe Union Inc Industrial-type variable-speed centrifuge
US3844949A (en) * 1972-05-19 1974-10-29 Fives Lille Cail Centrifugal drier
US20120317966A1 (en) * 2009-12-23 2012-12-20 Robert Bosch Gmbh Hydraulic arrangement
US9091282B2 (en) * 2009-12-23 2015-07-28 Robert Bosch Gmbh Hydraulic arrangement

Also Published As

Publication number Publication date
CH343291A (fr) 1959-12-15
BE568559A (en(2012))
LU36173A1 (en(2012))

Similar Documents

Publication Publication Date Title
US2380595A (en) Centrifugal machine and driving system therefor
US4223775A (en) Driving and braking apparatus
CN205834263U (zh) 机床刀架进给手动自动切换机构
US2984965A (en) Drive arrangement for driving a rotatable member in short intervals at high and low speeds
US3078623A (en) Finishing apparatus and method
ES272943A1 (es) Perfeccionamientos en las máquinas lavadoras y secadoras combinadas
US2667974A (en) Heavy cyclical centrifugal machine
US2752044A (en) Driving means for centrifugal machines
ES403537A1 (es) Disposicion de accionamiento para maquina lavadora.
US2080874A (en) Electrical control for centrifugal separating machines
US2148320A (en) Automatic control of centrifugal devices
US2551838A (en) Speed control system for centrifugals
US3170424A (en) Positional control systems
US2237373A (en) Reversing mechanism
US2152562A (en) Method of purging and washing solids in a centrifugal
US2731113A (en) Centrifugal braking and control apparatus
US2892520A (en) Brake mechanisms
US2081604A (en) Centrifugal circuit breaker
GB825254A (en) Improvements in or relating to methods of determining the extent to which moving containers in processing machines are filled with the material to be processed
US2642997A (en) Centrifugal machine
GB843020A (en) Improvements in or relating to centrifugal driers
US2234332A (en) Centrifugal separator
USRE17378E (en) To neg
US2974885A (en) Method of starting crushers
US2524678A (en) Suspended gyratory centrifugal