Valve seat assembly having mating surfaces with a reverse taper angle

Patent metadata

Field	Value
Publication number	US-11566713-B2
Application number	US-202117226964-A
Country	US
Kind code	B2
Filing date	Apr 9, 2021
Priority date	Apr 9, 2021
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A valve seat assembly includes a body having an insert pocket with an axially extending inner surface and a radially extending bottom surface. The valve seat further includes an insert disposed within the insert pocket of the body. The insert includes an axially extending outer surface and a radially extending bottom surface for mating with the axially extending inner surface and a radially extending bottom surface of the insert pocket of the body. The axially extending inner surface of the body is formed with a non-zero reverse taper angle, A4, for securing the insert within the insert pocket of the body. The axially extending outer surface of the insert is formed with a reverse taper angle, A5, equal to or greater than zero degrees. A valve assembly includes a valve and the valve seat assembly in reciprocating contact with the valve.

First claim

What is claimed is:

1. A valve seat assembly for a valve assembly, comprising:
a body including an insert pocket comprising an axially extending inner surface and a radially extending bottom surface; and
an insert disposed within the insert pocket of the body, the insert including an axially extending outer surface and a radially extending bottom surface for mating with the axially extending inner surface and the radially extending bottom surface of the body,
wherein the axially extending inner surface of the body, when viewed in cross-section, is formed with a non-zero reverse taper angle, A 4 , for securing the insert within the insert pocket of the body wherein the axially extending outer surface of the insert, when viewed in cross-section, is formed with a non-zero reverse taper angle, A 5 , and
wherein the non-zero reverse taper angle, A 4 , of the body is greater than the reverse taper angle, A 5 , of the insert.

2. The valve seat assembly of claim 1 ,
wherein the body further comprises an outer surface, an inner surface, and a frustoconical mating surface formed at an angle, A 3 , which respect to a plane substantially perpendicular to the central, longitudinal axis, C L , of the valve seat assembly,
wherein the insert further comprises a frustoconical mating surface formed at an angle, A 3 , which respect to a plane substantially perpendicular to the central, longitudinal axis, C L , of the valve seat assembly.

3. The valve seat assembly of claim 2 , wherein an outer surface of the body is formed with a taper angle, A 1 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

4. The valve seat assembly of claim 1 , wherein the body comprises a first portion and a second portion.

5. The valve seat assembly of claim 4 , wherein the first portion has a first outer diameter, D 1 , wherein the second portion has a second outer diameter, D 2 , and wherein the first outer diameter, D 1 , is greater in magnitude the second outer diameter, D 2 .

6. The valve seat assembly of claim 4 , wherein the body further comprises a shoulder proximate the first portion.

7. The valve seat assembly of claim 6 , wherein the body of the valve seat assembly further comprises an undercut proximate the shoulder.

8. The valve seat assembly of claim 7 , wherein the undercut is formed at an angle, A 2 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

9. The valve seat assembly of claim 7 , wherein the undercut comprises a chamfered surface formed at an angle, A 2 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

10. A valve assembly, comprising:
a valve; and
a valve seat assembly in reciprocating contact with the valve, the valve seat assembly comprising:
a body including an insert pocket comprising an axially extending inner surface and a radially extending bottom surface; and
an insert disposed within the insert pocket of the body, the insert including an axially extending outer surface and a radially extending bottom surface for mating with the axially extending inner surface and the radially extending bottom surface of the body,

wherein the axially extending inner surface of the body, when viewed in cross-section, is formed with a non-zero reverse taper angle, A 4 , for securing the insert within the insert pocket of the body wherein the axially extending outer surface of the insert, when viewed in cross-section, is formed with a non-zero reverse taper angle, A 5 , and
wherein the reverse taper angle, A 4 , of the body is greater than the reverse taper angle, A 5 , of the insert.

11. The valve assembly of claim 10 , wherein the valve further comprises a head including a frustoconical valve mating surface, and leg members extending from the head.

12. The valve assembly of claim 11 ,
wherein the body further comprises an outer surface, an inner surface, and a frustoconical mating surface formed at an angle, A 3 , which respect to a plane substantially perpendicular to the central, longitudinal axis, C L , of the valve seat assembly,
wherein the insert further comprises a frustoconical mating surface formed at an angle, A 3 , which respect to a plane substantially perpendicular to the central, longitudinal axis, C L , of the valve seat assembly, and
wherein the frustoconical mating surface of the body and the frustoconical mating surface of the insert cooperate with the frustoconical valve mating surface of the valve when the valve seat assembly is brought into a mating relationship with the valve.

13. The valve assembly of claim 12 , wherein an outer surface of the body is formed with a taper angle, A 1 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

14. The valve assembly of claim 10 , wherein the body comprises a first portion and a second portion.

15. The valve assembly of claim 14 , wherein the first portion has a first outer diameter, D 1 , wherein the second portion has a second outer diameter, D 2 , and wherein the first outer diameter, D 1 , is greater in magnitude the second outer diameter, D 2 .

16. The valve assembly of claim 14 , wherein the body further comprises a shoulder proximate the first portion.

17. The valve assembly of claim 16 , wherein the body of the valve seat assembly further comprises an undercut proximate the shoulder.

18. The valve assembly of claim 17 , wherein the undercut is formed at an angle, A 2 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

19. The valve assembly of claim 17 , wherein the undercut comprises a chamfered surface formed at an angle, A 2 , with respect to the central, longitudinal axis, C L , of the valve seat assembly.

Assignees

• Kennametal Inc

Inventors

• Poremski Jacob
• Bartkowiak Carrie
• Brosnahan John
• Long Ii Thomas J

Classifications

• F16K3/12 Primary

  with wedge-shaped arrangements of sealing faces · CPC title

• F16K1/42 Primary

  Valve seats (for double-seat valves F16K1/44) · CPC title

• F16K1/465

  to the valve seats · CPC title

• F15B13/021 Primary

  Valves for interconnecting the fluid chambers of an actuator · CPC title

• F16K3/30

  Details · CPC title