摘要:
A shaft can include a first portion comprising a first material having first material properties, a disconnect portion comprising at least some of a second material having second material properties, and a third portion comprising a third material having third material properties. The disconnect portion can be positioned between the first portion and the third portion, the three material properties being configured such that the first portion is physically disconnected from the third portion in response to failure of the disconnect portion under at least one of a mechanical load and/or an electrical load and/or thermal load.
摘要:
A vehicular propeller shaft is configured to transmit a rotational force output from a drive force source to drive wheels. The vehicular propeller shaft includes a stepped pipe-shaped member including a compressive load weakest part with respect to an axial compressive load of the vehicular propeller shaft and a torsional load weakest part with respect to a torsional load around an axis of the vehicular propeller shaft. The compressive load weakest part and the torsional load weakest part are positioned apart from each other in a radial direction of the stepped pipe-shaped member.
摘要:
A bearing component including a body of composite material having a surface configured as a bearing surface, the composite material including a plurality of round particles bound by a braze material, each of the plurality of round particles comprising a round outer layer encapsulating a wear resistant element.
摘要:
A method is disclosed of manufacture of a component (9) with an internal groove (2,3) comprising: providing a tubular first part (1) with an external groove, bonding or forming a second part (8) on the first part to at least partly cover the external groove, and removing material from the first part to open the external groove to an interior cavity of the component.
摘要:
In a mud-lubricated bearing assembly for a downhole motor, a mechanical seal is provided between the mandrel and the lower end of the bearing housing to prevent discharge of drilling fluid (mud) from the bearing assembly into the wellbore annulus. The mechanical seal is effected by mating wear-resistant annular contact surfaces provided on the mandrel and the bearing housing, with biasing means preferably being provided to keep the contact surfaces in sealing engagement during both on-bottom and off-bottom operational modes. The diverted drilling fluid passing through the bearings is redirected into the bore of the mandrel via ports through the mandrel wall to rejoin the main flow to the drill bit, such that substantially all of the drilling fluid flows through the bit.
摘要:
Various embodiments relate to polycrystalline diamond (“PCD”) bearing pads having first and second bearing pad portions that exhibit different wear rates, and bearing assemblies and apparatuses (e.g., thrust-bearing apparatuses and radial bearing apparatuses) that utilize such PCD bearing pads. In an embodiment, a PCD bearing pad for use in a bearing assembly of a subterranean drilling system includes a PCD bearing pad body including a plurality of directly-bonded together diamond grains. The PCD bearing pad body further includes a first bearing pad portion exhibiting a first wear resistance, and a second bearing pad portion exhibiting a second wear resistance greater than the first wear resistance.
摘要:
An auto-unlock assembly for a tubular lock has a rotating pipe, a rotating mount, a positioning board, a rotating spindle, a limiting mount, an retaining board and a limiting spring. The rotating pipe has a through hole. The rotating mount is connected to the rotating pipe and has two connecting wings. The positioning board is mounted in the rotating mount and has a body and two positioning wings. The rotating spindle is rotatably mounted through the rotating pipe and the positioning board via the rotating mount and has two protruding blocks. The limiting mount is mounted around the rotating spindle and has an acting face, a limiting recess and two mounting recesses. The retaining board is mounted around the rotating spindle, abuts the limiting mount and has a base and two protruding lugs. The limiting spring is mounted around the rotating spindle and abuts the retaining board.
摘要:
A flat blade for a transmission input shaft includes a substantially rectangular body portion for insertion in a center bore of the input shaft and at least one radial blade segment extending from the body portion. The radial blade segment is arranged for assembly proximate a distal end of the input shaft and for extending radially beyond the center bore. In an example embodiment, the radial blade segment is substantially rectangular in shape. In an example embodiment, the radial blade segment is a pair of radial blade segments extending in opposing directions. In an example embodiment, the body portion is arranged for press-fitting into the center bore.
摘要:
A device for detecting pressure and/or temperature changes in a fluid-channel and method thereof are disclosed. The device includes a main duct with an inlet and an outlet, a branch ductwork with a first branch end branching off the main duct downwards the inlet and with a second branch end discharging into the main duct upwards the outlet, and at least one dead-end channel with a first end that branches off the branch ductwork and a second closed end. The dead-end channel is adapted to trap a gas bubble within the dead-end channel when the device is primed or filled with a liquid fluid, wherein the gas bubble changes its size or position if a change in pressure or temperature occurs in the device.
摘要:
A locking paddle handle assembly for closures has a housing with a paddle handle pivotally mounted therein, a latch which latches and unlatches the closure upon rotation of the paddle handle, and a exterior key lock with a movable member that shifts between locked and unlocked positions. A deadbolt lock selectively engages the closure frame in the locked position to positively retain the closure closed. The deadbolt lock is operably connected with the movable key lock member, such that movement of the latter between the latched and unlatched positions contemporaneously shifts the deadbolt lock between the locked and unlocked positions. A remotely operable controller is operably connected with the deadbolt lock to power shift the same between the locked and unlocked positions from a remote location.