Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Patent
1982-01-13
1985-12-24
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
With condition responsive control of pump fluid valve
60419, 60648, 417 28, 417 41, 417 46, 417 63, F04B 4900
Patent
active
045603235
DESCRIPTION:
BRIEF SUMMARY
This invention relates to apparatus for controlling the flow of a fluid and in particular to apparatus employing a positive displacement device for controlling the flow of a fluid.
By the term "positive displacement device" we mean a device having an inlet and an outlet and at least one movable member which moves to displace fluid, the arrangement being such that the amount of fluid displaced is proportional to the amount by which the member is moved and that when the member is held stationary, substantially no fluid flows from the inlet to the outlet.
According to the present invention, there is provided apparatus for controlling flow of a fluid, including two positive displacement devices through which the fluid passes, and means for applying power to at least one of the positive displacement devices to drive the fluid through the apparatus.
Advantageously the two positive displacement devices are linked together. In that case the means for applying power can be dispensed with and at least one of the devices can be driven by fluid pressure.
With these arrangements, it is possible to control the pressures at input to and output from both of the devices by controlling the speeds at which the devices operate.
Desirably therefore the apparatus includes control means for controlling the speeds at which the devices operate. The control means may comprise a motor coupled to at least one of the devices.
According to the present invention, there is provided apparatus for controlling flow of a fluid including two positive displacement devices of which one is a motor arranged to be driven by the fluid and the other is a pump arranged to drive the fluid, and means to control the speed of at least one of the positive displacement devices so as to control the flow of fluid through the apparatus.
With this arrangement, it is possible to control the pressures at input to and output from the apparatus be variation of the speeds at which the positive displacement devices operate.
There is also provided according to the present invention apparatus for controlling flow of a fluid including two positive displacement devices of which one is a motor arranged to be driven by the fluid and the other is a pump arranged to drive the fluid, and a source of power arranged to be applied to at least one of the positive displacement devices.
Alternatively, the positive displacement devices may both be pumps. Or the positive displacement devices may both be motors. In that case it may be possible to dispense with the source of power.
In one arrangement, the incoming fluid flows first to the motor and then to the pump.
Alternatively, the arrangement is such that the incoming fluid flows first to the pump and then to the motor. With this arrangement the apparatus can be used to pump fluid to a height against gravity, e.g. to the top of a hill or high building. Also, the apparatus can receive fluid from a height and can reduce the pressure imposed on the fluid by gravity.
Advantageously means are provided for detecting the amount of movement performed by the movable member of at least one of the positive displacement devices.
With this arrangement the volume of fluid passing through the said one positive displacement device can be metered.
Conveniently means are provided for measuring fluid temperatures at inlet to and outlet from the apparatus.
With this arrangement the amount of heat taken from the fluid can be measured.
Desirably the apparatus includes means for detecting a leak of fluid from the apparatus. Preferably there are means for locking the apparatus stationary in case of such a leak. Preferably there are also means for preventing fluid from entering or leaving the apparatus in case of such a leak.
Advantageously means are included for limiting the maximum speed at which at least one of the positive displacement devices can operate.
Conveniently, the arrangement is such that the movable members of the positive displacement devices operate at a single, constant speed and control of fluid passing through the apparatus is achieved
REFERENCES:
patent: 1015464 (1912-01-01), Wilkins
patent: 1353216 (1920-09-01), Carlson
patent: 1972571 (1934-09-01), Musil
patent: 2208157 (1940-07-01), Grutzner
patent: 2888810 (1959-06-01), Hann
patent: 2932257 (1960-04-01), Lupin
patent: 3054263 (1962-09-01), Budzich et al.
patent: 3365133 (1968-01-01), Norton et al.
patent: 3589839 (1968-02-01), Johnson
patent: 3851661 (1974-12-01), Fernandez
patent: 4013385 (1977-03-01), Peterson
patent: 4021149 (1977-05-01), Rutenberg et al.
patent: 4221543 (1980-09-01), Cosentino
patent: 4336001 (1982-06-01), Andrew et al.
"Gasoline Alley" Comic, The Washington Post, Sep. 7, 1930.
European Search Report, EP 81 30 2107; The Hagus, 05-08-1981.
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