Mechanically or hybrid mounted valve seat
A valve seat for use within a hydraulic fracturing pump includes a first portion including a strike face for interacting with a reciprocating component associated with the valve seat. The valve seat also includes a second portion having a recess to receive at least a portion of the first portion, the first portion being coupled to the second portion using a hybrid joining method that includes both a mechanical fastener to secure the first portion to the second portion and a joining process to secure the first portion to the second portion.
1. A valve seat for use within a hydraulic fracturing pump, the valve seat comprising:
a first portion including:
a strike face for interacting with a reciprocating component associated with the valve seat; and
a first bore extending axially through the first portion;
a second portion including:
a recess in which at least a portion of the first portion is received;
a second bore extending axially through the second portion and substantially aligned with the first bore; and
an aperture extending from a circumference of the second portion to the recess; and
a mechanical fastener extending through the aperture and at least partially into the first portion thereby to prevent any axial movement of the first portion relative to the second portion in a first axial direction and a second axial direction opposite the first axial direction,
the first portion being coupled to the second portion via the mechanical fastener and via one or more of a press fit, a thermal shrink fit, brazing, welding, fusing, or cementing via adhesive.
2. The valve seat of claim 1 , wherein the mechanical fastener includes a threaded fastener that is threadably engaged with the first portion.
3. The valve seat of claim 1 , wherein the first portion comprises a first material, and the second portion comprises a second material different than the first material.
4. The valve seat of claim 3 , wherein the first material comprises carbide, and the second material comprises steel.
5. The valve seat of claim 1 , wherein the aperture is arranged in a radial configuration extending toward an axis of the second portion.
6. The valve seat of claim 1 , wherein the aperture comprises a plurality of apertures at different circumferential positions around the first portion, and the mechanical fastener comprises a plurality of mechanical fasteners each received in one of the plurality of apertures.
7. The valve seat of claim 1 , wherein the first portion includes a surface area, and the strike face has a surface area less than the surface area of the first portion.
8. The valve seat of claim 1 , wherein the first portion does not fully cover the second portion.
9. The valve seat of claim 1 , wherein the recess of the second portion comprises one or more of a sloped region, a transition, or a planar region.
10. The valve seat of claim 9 , wherein the recess of the second portion comprises a transition, and the aperture extends through the transition.
11. The valve seat of claim 1 , further comprising one of a plug or a seal received in the aperture and covering the mechanical fastener.
12. The valve seat of claim 1 , wherein the second portion includes a shoulder, and the first portion covers the shoulder.
13. The valve seat of claim 1 , wherein the second portion includes a shoulder, and the first portion does not cover the shoulder.
14. The valve seat of claim 1 , wherein the second portion includes a shoulder, and the shoulder is sloped toward the second bore.
15. The valve seat of claim 1 , wherein the first portion has a thickness, and the thickness of the first portion varies from an outer diameter of the first portion toward the first bore.
16. The valve seat of claim 1 , wherein the second portion has an outer diameter and at least partially defines a recessed portion, the recessed portion having a cross-section including:
a sloped region extending radially inward from the outer diameter; and
a transition portion extending from the sloped region and parallel to the first axial direction, the aperture extending into the transition portion.
17. A valve assembly, comprising:
a valve member configured to reciprocate within a bore; and
a valve seat having a strike face, the strike face positioned to contact the valve member, the valve seat comprising:
a first portion including:
at least a portion of the strike face; and
a first bore extending axially through the first portion;
a second portion including:
a recess in which at least a portion of the first portion is received;
a second bore extending axially through the second portion and substantially aligned with the first bore; and
an aperture extending from a circumference of the second portion to the recess; and
a mechanical fastener extending through the aperture and at least partially into the first portion thereby to prevent any axial movement of the first portion relative to the second portion in a first axial direction and a second axial direction opposite the first axial direction,
the first portion being coupled to the second portion via the mechanical fastener and via one or more of a press fit, a thermal shrink fit, brazing, welding, fusing, or cementing via adhesive.
18. The valve assembly of claim 17 , wherein the first portion comprises a first material, and the second portion comprises a second material, and wherein the first material comprises carbide and the second material comprises steel.
19. The valve assembly of claim 17 , wherein the aperture is arranged in a radial configuration extending toward an axis of the second portion.
20. The valve assembly of claim 17 , wherein:
the first bore and the second bore are aligned along a central axis, and wherein the first portion fully covers the second portion when the first portion of the valve seat is viewed from a side of the valve assembly opposite the second portion relative to the first portion and in a direction along the central axis.
21. The valve assembly of claim 17 , wherein the mechanical fastener includes a threaded fastener that is threadably engaged with the first portion.
22. The valve assembly of claim 17 , wherein the aperture comprises a plurality of apertures at different circumferential positions around the first portion, and the mechanical fastener comprises a plurality of mechanical fasteners each received in one of the plurality of apertures.
23. The valve assembly of claim 17 , wherein the first portion includes a surface area, and the strike face has a surface area less than the surface area of the first portion.
24. The valve assembly of claim 17 , wherein the first portion does not fully cover the second portion.
25. The valve assembly of claim 17 , wherein the recess of the second portion comprises one or more of a sloped region, a transition, or a planar region.
26. The valve assembly of claim 25 , wherein the recess of the second portion comprises a transition, and the aperture extends through the transition.
27. The valve assembly of claim 17 , further comprising one of a plug or a seal received in the aperture and covering the mechanical fastener.
28. The valve assembly of claim 17 , wherein the second portion includes a shoulder, and the first portion covers the shoulder.
29. The valve assembly of claim 17 , wherein the second portion includes a shoulder, and the first portion does not cover the shoulder.
30. The valve assembly of claim 17 , wherein the second portion includes a shoulder, and the shoulder is sloped toward the second bore.
31. The valve assembly of claim 17 , wherein the first portion has a thickness, and the thickness of the first portion varies from an outer diameter of the first portion toward the first bore.
32. The valve assembly of claim 17 , wherein the second portion has an outer diameter and at least partially defines a recessed portion, the recessed portion having a cross-section including:
a sloped region extending radially inward from the outer diameter; and
a transition portion extending from the sloped region and parallel to the first axial direction, the aperture extending into the transition portion.