US 8,100,407 B2Granted

Packing cartridges and pressure-dampening elements for plunger-type pumps

OwnerEddie N. Stanton, Michael L. Stricklandinventors

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Abstract

A package cartridge is provided for use in the maintenance of a packing bore for a plunger-type pump. According to one aspect, a packing cartridge includes: a generally-cylindrical sleeve adapted to be at least partially positioned in the packing bore, a first abutment ring positioned in the sleeve, and a second abutment ring positioned in the sleeve and co-axially spaced apart from the first abutment ring. Telescoping structures are operatively positioned between the first abutment ring and the second abutment ring. According to another aspect, a structure forming a circumferential pressure-ring groove is provided. A pressure ring is positioned in the pressure-ring groove, the pressure ring having at least one smaller external dimension than an internal dimension of the pressure-ring groove, whereby at least one clearance is provided between the pressure-ring groove and the pressure ring. These aspects can be advantageously practiced together.

Claims31

Dependent claims

A plunger pump comprising:

a packing bore for a reciprocating plunger, wherein the packing bore has a generally cylindrical interior wall and a seat and a removable gland, and;
a packing cartridge wherein the packing cartridge comprising:
a. a generally-cylindrical sleeve having an outer cylindrical profile least partially positioned in the packing bore;
b. a first abutment ring positioned in the sleeve;
c. a second abutment ring positioned in the sleeve and co-axially spaced apart from the first abutment ring;
d. telescoping structures operatively positioned between the first abutment ring and the second abutment ring to allow for squeezing of the first abutment ring and second abutment ring co-axially closer to one another while the telescoping structures are free to rotate relative to one another as the abutment rings are axially squeezed;
and
e. a retaining ring operatively positioned between the telescoping structures to retain the telescoping structures together and to allow for squeezing of the first abutment ring and second abutment ring co-axially closer to one another, wherein the telescoping structures would not be axially retained together in the absence of the removable gland and the retaining ring;
wherein the packing cartridge is positioned in the packing bore between the seat and the removable gland so that the squeezing of the first abutment ring and the second abutment ring closer together is provided by the tightening the removable gland over the packing cartridge.

6 more elements

The plunger pump comprising:

a packing bore for a reciprocating plunger, wherein the packing bore has a generally cylindrical interior wall and a seat and a removable gland, and;
a packing cartridge, wherein the packing cartridge comprises:
a. a first element comprising:
i. a first sleeve portion having a outer cylindrical profile positioned in at least a portion of the packing bore;
and
ii. a first abutment ring positioned to extend inwardly and substantially circumferentially relative to the first sleeve portion;
and
b. a second element comprising:
i. a second sleeve portion having at least a portion thereof telescopically positioned in at least a portion of the first sleeve portion;
and
ii. a second abutment ring positioned to extend inwardly and substantially circumferentially relative to the second sleeve portion;
and
c. a means for axially retaining the first and second sleeve portion together, wherein the first and second sleeve portion would not be axially retained together in the absence of the removable gland and the means for axially retaining;
wherein the first sleeve portion and the second sleeve portion and the means for axially retaining are operatively positioned between the first abutment ring and the second abutment ring to allow for squeezing of the first abutment ring and second abutment ring co-axially closer to one another while the first and second sleeve are free to rotate relative to one another as the first and second abutment ring are axially squeezed together;
and
wherein the packing cartridge is positioned in the packing bore between the seat and the removable gland so that the squeezing of the first abutment ring and the second abutment ring closer together is provided by tightening the removable gland over the packing cartridge.

13 more elements

A plunger pump comprising:

a packing bore for a reciprocating plunger, wherein the packing bore has a generally cylindrical interior wall and a seat and a removable gland, and;
a packing cartridge wherein the packing cartridge comprising:
a. a generally-cylindrical sleeve having an outer cylindrical profile least partially positioned in the packing bore;
b. a first abutment ring positioned in the sleeve;
c. a second abutment ring positioned in the sleeve and co-axially spaced apart from the first abutment ring;
d. packing positioned between the first abutment ring and the second abutment ring;
e. telescoping structures operatively positioned between the first abutment ring and the second abutment ring to allow for squeezing of the first abutment ring and second abutment ring co-axially closer to one another while the telescoping structures are free to rotate relative to one another as the abutment rings are axially squeezed;
and
f. a retaining ring operatively positioned between the telescoping structures to retain the telescoping structures together and to allow for squeezing of the first abutment ring and second abutment ring co-axially closer to one another, wherein the telescoping structures would not be axially retained together in the absence of the removable gland and the retaining ring;
wherein the packing cartridge is positioned in the packing bore between the seat and the removable gland so that the squeezing of the first abutment ring and the second abutment ring closer together is provided by the tightening the removable gland over the packing cartridge;
and
wherein the telescoping structures and the retaining ring are operative to allow the packing to be held in a pre-assembled but relaxed condition.

9 more elements

Dependencies are inferred from the claim text.