GB190620645A - Improvements in Fluid Pressure Pump Governors. - Google Patents

Abstract

20,645. Turner, W. V. Sept. 21, 1905, [date applied for under Patents Act, 1901]. Governing or controlling pumps.-In a pump governor, the pressure in the fluid reservoir opens a pilot valve carried by an adjustable diaphragm and causes the movement of a piston valve admitting fluid from the reservoir to the underside of a spring- pressed piston, which is thereby raised to break the electric driving-circuit of the pump. Fig. 1 shows the piston valve 24, the pistons 23, 22 of which have leakage holes or grooves. A pipe 16 supplies fluid from the reservoir to the space 19, and also to one side of a diaphragm 32 adjusted by means of a nut 39. The motion of the diaphragm 32, when the pressure in the reservoir reaches the maximum, opens a pilot valve 35 and so opens the space 20 to the atmosphere. The piston valve then moves to the left and admits fluid from the reservoir through a passage 26 to the space below the piston 7. This separates the contacts 10, 12 and stops the pump. A similar arrangement is provided to close the circuit again when the reservoir pressure falls to a minimum. When this happens, a diaphragm 38 opens a valve 43, and puts the space 21 in communication with the atmosphere. The piston valve then moves to the right, into the position shown, the passage 26 is connected to the atmosphere through a port 27, and the piston 7 is pushed down by its spring, bringing the pump into action again. The governor may be employed with other than electric driving- means and may operate such as clutches, valves, or belt forks. A slightly modified construction of the piston valve 24 is described and illustrated, designed to facilitate the prompt action of the piston 7. A modified construction of governor has a third diaphragm and pilot valve, and is applicable to the case of a common pipe line supplied by a number of pumps each with its reservoir. The additional diaphragm is exposed to the pressure in the pipe line, which is cut off by a check valve from the reservoir, and in a manner similar to that above described causes each pump to come into action when any one pump does so.