초록 ▼

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,

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.

대표청구항 ▼

1. 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 cylindrica

1. 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; ande. 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. 2. The plunger according to claim 1, wherein the telescoping structures have at least sufficient overlapping travel to allow for the expected crushing of packing during the operation of a plunger though the packing cartridge. 3. The plunger pump according to claim 1, further comprising: a spring operatively positioned between the first abutment ring and the second abutment ring. 4. The plunger pump according to claim 3, wherein the telescoping structures have at least sufficient overlapping travel to help maintain the first abutment ring and second abutment ring in substantial co-axial alignment while the spring is anywhere between a substantially relaxed condition and a substantially compressed condition. 5. The plunger pump according to claim 1, wherein the sleeve further comprises a first portion and a second sleeve portion, and wherein the telescoping structures are part the first and second sleeve portions. 6. The plunger pump according to claim 5, wherein the first sleeve portion is positioned in at least a portion of the packing bore; and the second sleeve portion has at least a portion thereof telescopically positioned in at least a portion of the first sleeve portion. 7. The plunger pump according to claim 5, wherein the first abutment ring is operatively connected to the first sleeve portion and the second abutment ring is operatively connected to the second sleeve portion. 8. The plunger pump according to claim 5, wherein the first abutment ring is integrally formed with the first sleeve portion and the second abutment ring is integrally formed with the second sleeve portion. 9. The plunger pump according to claim 5, further comprising a spacer ring operatively positioned to cover the overlapping travel of the telescoping structures between the first and second sleeve portions, wherein the spacer ring is positioned to help prevent seepage of fluid into any clearances between the first sleeve portion and the second sleeve portion 10. The plunger pump according to claim 1, wherein the telescoping structures are a part of the sleeve and one of the first and second abutment rings. 11. The plunger pump according to claim 10, wherein the other one of the first and second abutment rings is integrally formed with the sleeve. 12. The plunger pump according to claim 1, wherein the retaining ring comprises a resilient ring adapted to be positioned in a groove in one of the telescoping structures, whereby the resilient ring frictionally engages the other telescoping structure to resist separation of the telescoping structures. 13. A plunger pump according to claim 1, further comprising: packing positioned between the first abutment ring and the second abutment ring. 14. The plunger pump according to claim 13, wherein the packing further comprising a plurality of packing elements. 15. The plunger pump according to claim 14, wherein at least one packing spacer is positioned between any two of the plurality of packing elements. 16. The plunger pump according to claim 1, wherein the telescoping structures and the retaining ring are operative to allow a packing to be held in a pre-assembled but relaxed conditioned. 17. 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; andii. a first abutment ring positioned to extend inwardly and substantially circumferentially relative to the first sleeve portion; andb. 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; andii. a second abutment ring positioned to extend inwardly and substantially circumferentially relative to the second sleeve portion; andc. 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; andwherein 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. 18. The plunger pump according to claim 17, further comprising a spacer ring operatively positioned to cover the overlapping travel of the first and second sleeve portions wherein the spacer ring is positioned to help prevent seepage of fluid into any clearance between the first sleeve portion and the second sleeve portion. 19. The packing cartridge according to claim 17, further comprising: a spring operatively positioned between the first abutment ring and the second abutment ring. 20. The plunger pump according to claim 19, wherein the telescoping first and second sleeve portions have at least sufficient overlapping travel to help maintain the first abutment ring and second abutment ring in substantial co-axial alignment while the spring is anywhere between a substantially relaxed condition and a substantially compressed condition. 21. A plunger pump according to claim 17, further comprising: packing positioned between the first abutment ring and the second abutment ring. 22. The plunger pump according to claim 21, wherein the packing further comprising a plurality of packing elements. 23. The plunger pump according to claim 22, wherein at least one packing spacer is positioned between any two of the plurality of packing elements. 24. The plunger pump according to claim 17, wherein the first abutment ring is integrally formed with the first sleeve portion and the second abutment ring is integrally formed with the second sleeve portion. 25. The plunger pump according to claim 17, wherein the means for axially retaining comprises: a. a retaining groove and an interference surface cooperatively positioned between the first and second sleeve portions; andb. a resilient ring positioned in the retaining groove for frictionally engaging the interference surface, whereby when the resilient ring in the retaining groove is moved axially against the interference surface, the resilient ring frictionally engages the interference surface and resists separation of the first and second sleeve portions. 26. The plunger pump according to claim 17, wherein the first and second sleeve portions and the means for axially retaining are operative to allow a packing to be held in a pre-assembled but relaxed condition. 27. 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; andf. 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; andwherein the telescoping structures and the retaining ring are operative to allow the packing to be held in a pre-assembled but relaxed condition. 28. The plunger pump according to claim 27, further comprising: a spring operatively positioned between the first abutment ring and the second abutment ring. 29. The plunger pump according to claim 28, wherein the telescoping structures have at least sufficient overlapping travel to help maintain the first abutment ring and second abutment ring in substantial co-axial alignment while the spring is anywhere between a substantially relaxed condition and a substantially compressed condition. 30. The plunger pump according to claim 29, wherein the sleeve further comprises a first sleeve portion and a second sleeve portion, and wherein the telescoping structures are a part of the first and second sleeve portion. 31. The plunger pump according to claim 30, further comprising a spacer ring operatively positioned to cover the overlapping travel of the telescoping structures between the first and second sleeve portions, wherein the spacer ring is positioned to help prevent seepage of fluid into any clearances between the first sleeve portion and the second sleeve portion.