Controller for varying flow rate from fixed displacement pump

摘要

A controller for varying flow rate of a fluid from a fixed displacement pump is provided. The controller includes a pump speed control gear set, a ratio control pump, and a relief valve. The pump speed control gear set includes a sun gear configured to be driven by a prime mover, a planet carrier including one or more planet gears meshed with the sun gear, and a ring gear meshed with the planet gears. The ring gear is configured to connect to an input shaft of the fixed displacement pump. The ratio control pump includes a stationary body, and a rotor coupled to the planet carrier of the pump speed control gear set. The rotor is configured to co-act with the body to pump fluid. The relief valve is connected to the ratio control pump and configured to restrict fluid egress from the ratio control pump.

主权项

1. A controller for varying flow rate of a fixed displacement pump, the controller comprising:
a pump speed control gear set including at least:
a sun gear configured to be driven by a prime mover;a planet carrier including one or more planet gears meshed with the sun gear; anda ring gear meshed with the planet gears and configured to connect to an input shaft of the fixed displacement pump; and a ratio control pump including:
a stationary body; anda rotor coupled to the planet carrier of the displacement control gear set and configured to co-act with the body to pump fluid; anda relief valve connected to the ratio control pump and configured to restrict fluid egress from the ratio control pump.