US 5,924,853 A · High pressure pump

Abstract

A high pressure fluid pump 10 supplies fluids to a water blasting or cutting gun 14. The pump 10 is preferably of the in-line type, wherein both an inlet check valve 60 and a discharge check valve 62 move linearly along the axis 40 of the plunger 30 during a complete pumping cycle. A plurality of compression rods 42 are spaced circumferentially about a plunger housing 24, and press the plunger housing into sealing engagement with a suction valve seat 56, press the suction valve seat into sealing engagement with a pump discharge housing 36, press the pump discharge housing into sealing engagement with a discharge end plate 38. Seal ring 66 is provided for sealing between a front planar face 114 of the suction valve seat and a rear planar face 112 of the plunger housing. A weep path 116 extends radially outward from the seal ring 66 to release fluids which pass by the compressible seal ring. Plunger housing 24 is provided with a uniform diameter bore 106 extending axially between the plunger seal 54 and the rear planar face 112. A selected bearing material bushing 82 is provided within the plunger housing 24, and a high temperature seal ring 80 is spaced radially outward from a front portion of the bushing to prevent the bushing from becoming seized to the plunger housing. One or more rod front ends 140 may be interconnected with a corresponding compression rod 42 for attaching a support rod 46 thereto during a pump service operation. An alignment connector 28 structurally interconnects a pump rod 26 and a plunger 30, and further reduces the time and expense of pump maintenance.

Claims31

Dependent claims

A high pressure fluid pump, comprising:

a suction valve seat including a fluid inlet and a fluid outlet;
a plunger housing defining a cylindrical plunger chamber therein having a central axis:
a plunger linearly moveable within the plunger chamber along the central axis during stroking of the pump;
an inlet check valve for passing fluids from the fluid inlet to the plunger chamber and for preventing fluids from passing from the plunger chamber to the fluid inlet, the inlet check valve being axially moveable along the central axis for sealing engagement with the suction valve seat;
a discharge check valve for passing fluids from the plunger chamber and for preventing high pressure fluid downstream from the discharge check valve from returning to the plunger chamber, the discharge check valve being axially moveable along the central axis;
a discharge housing having a pump discharge flow line therein for receiving high pressure fluid passed by the discharge check valve from the pump chamber;
a plunger seal for sealing between the plunger housing and the plunger;
a stop sleeve positioned within the plunger chamber and in engagement with the suction valve seat;
a packing ring positioned within the plunger chamber for compressing the plunger seal;
and
a biasing member positioned within the plunger chamber for acting between the stop sleeve and the packing ring to exert an axially compressive force on the plunger seal through the packing ring.

8 more elements

A high pressure fluid pump, comprising:

a plunger housing defining a cylindrical plunger chamber therein having a central axis;
a plunger linearly moveable within the plunger chamber along the central axis during stroking of the pump;
an inlet check valve for passing fluids to the plunger chamber and for preventing fluids from passing from the plunger chamber to a pump inlet;
a discharge check valve for passing fluids from the plunger chamber and for preventing high pressure fluid downstream from the discharge check valve from returning to the plunger chamber;
a plunger seal for sealing between the plunger housing and the plunger;
a bushing positioned at least partially within the plunger chamber and fabricated from a selected bearing material, the bushing having a radially inner bore for guiding engagement with the linearly movable plunger and a front portion extending axially toward the plunger seal;
and
a sleeve ring positioned within the plunger chamber and fabricated from a selected high temperature resistant material, the sleeve ring being spaced radially between the front portion of the bushing and the plunger housing, thereby reducing the likelihood of the bushing becoming seized to the plunger housing.

5 more elements

A high pressure fluid pump, further comprising:

a suction valve seat including a fluid inlet and a fluid outlet;
a plunger housing defining a cylindrical plunger chamber therein having a central axis;
a plunger linearly moveable within the plunger chamber along the central axis during stroking of the pump;
an inlet check valve for passing fluids from the fluid inlet to the plunger chamber and for preventing fluids from passing from the plunger chamber to the fluid inlet, the inlet check valve being axially moveable along the central axis for sealing engagement with the suction valve seat;
a discharge check valve for passing fluids from the plunger chamber and for preventing high pressure fluid downstream from the discharge check valve from returning to the plunger chamber, the discharge check valve being axially moveable along the central axis;
a discharge housing having a pump discharge flow line therein for receiving high pressure fluid passed by the discharge check valve from the pump chamber;
a front plunger seal for sealing between the plunger housing and the plunger;
a rear suction valve seat seal for sealing between the plunger housing and the suction valve seat;
and
the plunger chamber within the plunger housing having a uniform diameter bore extending axially from the front plunger seal to the rear suction valve seat seal.

7 more elements

A high pressure fluid pump, further comprising:

a plunger housing defining a cylindrical plunger chamber therein having a central axis, the plunger housing having a rear planar face;
a plunger linearly moveable within the plunger chamber along the central axis during stroking of the pump;
a suction valve seat including a fluid inlet and a fluid outlet, the suction valve seat being in sealed engagement with the rear planar face of the plunger housing;
an inlet check valve for passing fluids from the fluid inlet to the plunger chamber and for preventing fluids from passing from the plunger chamber to the fluid inlet;
a discharge check valve for passing fluids from the plunger chamber and for preventing high pressure fluid downstream from the discharge check valve from returning to the plunger chamber;
a plunger seal for sealing between the plunger housing and the plunger;
and
the plunger chamber within the plunger housing having a uniform diameter bore extending axially from the plunger seal to the rear planar face of the plunger housing in sealed engagement with suction valve seat.

5 more elements

Dependencies are inferred from the claim text.

High pressure pump

Life of this patent

High pressure pump

Life of this patent

Abstract

Claims31