초록

A vane pump and a process for operating it in which an eccentric ring against which the vanes ride is shifted in response to a temperature sensing element which bears upon the ring against the force of a spring acting thereon counter to the temperature sensing element.

대표청구항 ▼

[ We claim:] [1.] A controllable lubricant vane pump, comprising:a housing;a rotor rotatable in said housing about an axis and provided with pumping vanes extending from the rotor;an eccentric ring surrounding said rotor and against which said vanes ride, said ring having on one side a pivot with an

[ We claim:] [1.] A controllable lubricant vane pump, comprising:a housing;a rotor rotatable in said housing about an axis and provided with pumping vanes extending from the rotor;an eccentric ring surrounding said rotor and against which said vanes ride, said ring having on one side a pivot with an axis parallel to the axis of said rotor and on an opposite side, a projection extending from said ring;a first spring in said housing braced against said projection and a piston in said housing bearing against said projection against a force of said first spring; anda regulating device acting upon said ring against the force of said first spring, said regulating device comprising:a wedge linearly guided in said housing and bearing on said ring between said pivot and said projection against the force of said first spring,a second spring braced in said housing and bearing upon said wedge to urge said wedge between said housing and said ring in a direction wherein said wedge presses said ring against a force of said first spring to reduce eccentricity of said ring relative to said rotor, anda thermally sensitive element interposed between said wedge and said housing and expanding with increasing temperature to displace said wedge against a force of said second spring so that with decreasing temperature said ring is displaced about said axis of said pivot further against the force of said first spring.