摘要:
A hydraulic tool includes a stator, a rotor, and a removable coating. At least one of the stator and the rotor comprises a resilient material. The removable coating has a thickness selected to compensate for expected swelling of the resilient material or an expected contraction of a clearance between the rotor and the stator based on thermal expansion. The removable coating is disposed on a surface of at least one of the rotor and the stator, and the removable coating is formulated to be removed during operation of the hydraulic tool. A method of operating a hydraulic tool includes passing a fluid through the hydraulic tool during rotation of the rotor within the stator and removing at least a portion of the removable coating responsive to rotation of the rotor within the stator as a volume of the resilient material increases responsive to contact with the fluid passing through the hydraulic fluid.
摘要:
A compressor has a housing. One or more working elements cooperate with the housing to define a compression path between suction and discharge locations. An intermediate port is located along the compression path. A branch path extends to the intermediate port. The compressor includes means for limiting pressure pulsations along the branch path.
摘要:
A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.
摘要:
A compressor has a housing. One or more working elements cooperate with the housing to define a compression path between suction and discharge locations. An intermediate port is located along the compression path. A branch path extends to the intermediate port. The compressor includes means for limiting pressure pulsations along the branch path.
摘要:
A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.
摘要:
Die Erfindung betrifft eine Rotationspumpe mit regelbarem Fördervolumen, umfassend: a) ein Gehäuse (3, 6), b) eine in dem Gehäuse (3, 6) gebildete Förderkammer mit einem Einlass (4) für ein Fluid auf einer Niederdruckseite und einem Auslass (5) für das Fluid auf einer Hochdruckseite der Pumpe, c) wenigstens einen in der Förderkammer um eine Drehachse (R 2 ) drehbaren Förderrotor (2), d) ein zu einer Stirnseite des Förderrotors (2) angeordnetes oder den Förderrotor umgeben des Stellglied (15), das für die Verstellung des Fördervolumens in dem Gehäuse (3, 6) hin und her bewegbar ist, e) wobei das Stellglied (15) in Richtung seiner Bewegbarkeit mit einer von dem Bedarf eines mit dem Fluid zu versorgenden Verbrauchers abhängigen Stellkraft beaufschlagbar ist, f) und eine in dem Gehäuse (3, 6) gebildete Laufbahn (3a), die das Stellglied (15) an einer Stellglied-Gleitfläche (15a) in einem Gleitkontakt führt, g) wobei ein Gleitmaterial, das wenigstens eines aus Laufbahn (3a) und Stellglied- Gleit fläche (15a) bildet, aus wenigstens einem aus Kunststoff, Keramik, Nitrid, einer Nickel phosphorverbindung oder einem Gleitlack besteht oder von einer DLC-Beschichtung, einer Ferroprint-Beschichtung oder einer Nano-Beschichtung gebildet wird.
摘要:
In a screw rotor (40), a first suction-side area (45) is formed in a first side wall surface (42) of a spiral groove (41). In the first side wall surface (42), a portion extending from a start point to a point until immediately before a compression chamber (23) is in a completely-closed state defines the first suction-side area (45). The first suction-side area (45) is thinner than a portion of the first side wall surface (42) other than the first suction-side area (45), and does not contact a gate (51) of a gate rotor (50).