High-pressure gear pump

Claim 2

A high-pressure gear pump with pressure compensation in the axial and radial direction, comprising in combination: a rigid housing, at least two meshing gears rotating inside said housing, at least one of said gears including a shaft extending from both sides of said gear in the form of a trunnion, bearing means for each one of said trunnions, said bearing means being yieldingly connected to said rigid housing, so that the axis of said bearing means is forcibly deflectable within the elastic limits of the connection.

Claim 3

A high-pressure gear pump with pressure compensation in the axial and radial direction, comprising in combination: a rigid housing, at least two meshing gears rotating inside said housing, at least one of said gears including a shaft extending from both sides of said gear in the form of a trunnion, bearing means for each one of said trunnions, said bearing means being yieldingly connected to said rigid housing, so that the axis of said bearing means is forcibly deflectable within the elastic limits of the connection, said rigid housing further comprising at least one side cover having a rigid main body, and wherein said bearing means has the form of a bearing block, said bearing block being a part of said cover and yieldingly connected to its main body.

Claim 4

A high-pressure gear pump with pressure compensation in the axial and radial direction, comprising in combination: a rigid housing, at least two meshing gears rotating inside said housing, at least one of said gears including a shaft extending from both sides of said gear in the form of a trunnion, bearing means for each one of said trunnions, said bearing means being yieldingly connected to said rigid housing, so that the axis of said bearing means is forcibly deflectable within the elastic limits of the connection, said rigid housing further comprising at least one side cover having a rigid main body, and wherein said bearing means has the form of a bearing block, said bearing block being a part of said cover and yieldingly connected to its main body.

Claim 5

A high-pressure gear pump as claimed in claim 2, wherein said bearing block is connected to the main body of said side cover by a resiliently yielding riblike flange extending radially from said bearing block, and said riblike flange faces axially the pressure side of the pump.

Claim 6

A high-pressure gear pump as claimed in claim 3, wherein said riblike flange extends radially between said bearing block and the main body of said end cover, so that it faces axially both the pressure side and the admission side of the pump; the portion of said flange facing the pressure side representing a comparatively thick wall, and the portion facing the admission side representing a comparatively thin wall.

Claim 7

A high-pressure gear pump as claimed in claim 2, wherein said bearing block is longitudinally split by the provision of a slot extending from the gear-facing side of the block over at least a substantial portion of its axial length, thereby defining two bearing halves; and wherein at least one of said bearing halves is yieldingly connected to the main body of said side cover by a riblike flange extending radially from said bearing half at the side facing away from the gears, and said yielding takes place at least partially in that axial portion of said bearing half which defines the transition between it and said flange.

Claim 8

A high-pressure gear pump as claimed in claim 5, wherein said yieldingly connected bearing half carries the radial bearing load resulting on its side from the operating pressure; and whErein said transition between the flange and the bearing half has the shape of a ring section.

Claim 9

A high-pressure gear pump as claimed in claim 6, wherein the dimensions of said yielding connection and of said transition are selected so that the deflection of said bearing half corresponds substantially to the deflection of the trunnion journaled therein, when both are subjected to the operational load.