摘要:
An apparatus according to which a power end of a reciprocating pump assembly includes a block having bores formed therethrough, and crossheads disposed in the bores and adapted to reciprocate therein. A lubrication pump is in fluid communication with the bores. The pump is operable to pump lubrication fluid into each of the bores so that the crossheads are lubricated as they reciprocate within their respective bores. In another aspect, a power end includes a crosshead block and a power frame connected thereto, the frame including rib plates and supporting the crosshead block. In yet another aspect, a method includes casting a crosshead block; fabricating rib plates; connecting the rib plates to form a frame; and connecting the cast crosshead block to the frame. In some embodiments, the power ends may be used in oilfield operations such as, for example, the cementing, acidizing, or fracturing of a subterranean wellbore.
摘要:
A lubricator pump adjuster for use with a lubricator pump having a piston housed in a pump body and a rocker connected to the piston. The lubricator pump adjuster comprises a mounting fitting attachable to the pump body and a housing disposed on the mounting fitting. An actuator is disposed in the housing and connectable to the rocker, whereby activation of the actuator causes the rocker to move, thereby adjusting the stroke of the piston. The actuator is a rotary actuator with an output shaft. The lubricator pump adjuster includes a cam faced member attached to the output shaft, and a plunger in contact with the cam faced member that is connectable to the rocker. The cam faced member may include a spiral-ramped surface.
摘要:
An apparatus according to which a power end of a reciprocating pump assembly includes a block having bores formed therethrough, and crossheads disposed in the bores and adapted to reciprocate therein. A lubrication pump is in fluid communication with the bores. The pump is operable to pump lubrication fluid into each of the bores so that the crossheads are lubricated as they reciprocate within their respective bores. In another aspect, a power end includes a crosshead block and a power frame connected thereto, the frame including rib plates and supporting the crosshead block. In yet another aspect, a method includes casting a crosshead block; fabricating rib plates; connecting the rib plates to form a frame; and connecting the cast crosshead block to the frame. In some embodiments, the power ends may be used in oilfield operations such as, for example, the cementing, acidizing, or fracturing of a subterranean wellbore.
摘要:
An oil circulation system for a gas turbine engine includes a variable displacement scavenge pump for pumping oil, a first actuator for controlling displacement of the scavenge pump, a variable displacement pressure pump for pumping oil, a second actuator for controlling displacement of the pressure pump, and a drive shaft. Both the scavenge pump and the pressure pump are driven by the drive shaft.
摘要:
An improved lubrication system for use in connection with high pressure processing and particularly useful for LDPE processing. The lubricating system utilizes flow meters to monitor and control the supply pressure and oil flow to a machine lubrication point. Furthermore, two different types of oil may be used so as to alleviate down time and repair often associated with use of food grade oil as the lubricate for the camshaft and other working components of the lubrication system.
摘要:
A medium pump for a motor includes a pump case with a pump cylinder and a pump piston positioned displacaebly in the pump cylinder in the direction of a pump axle. The pump piston rotates about the pump axle by running off an oblique control surface and realizes axial pump movements against the pressure of a first spring. A pump lift adjusting device is removably positioned in a guide placed transversely to the pump axle and fixedly connected with the pump case.
摘要:
A lance pump, particularly for lubricant, having a fixed plunger and a pump tube reciprocable in cycles through an outward stroke and an inward stroke on each cycle on the plunger, operable to deliver metered charges of lubricant on each outward stroke as well as on each inward stroke.
摘要:
A piston-type positive-displacement liquid-metering pump with an output-control apparatus for varying the pump output volume per piston stroke by very minute amounts on a smoothly gradual and continuous basis, in which an actuator or actuation portion of the piston has an associated stop structure for limiting its allowable movement to thereby limit the output volume produced on each stroke of the piston, and an indexing member disposed in alignment with the stop structure and having a portion engageable therewith to effect the aforementioned limitation on allowable piston movement and thus define the stroke length of the piston. A continuously variable coupling is operatively disposed between the indexing member and the pump body and/or the indexing member, for changing the effective position of the stop structure relative to the pump body or indexing member and thus changing the allowable length of the piston stroke. Preferably, the stop structure comprises an abutment member such as a spring clip secured along the length of the piston, and the indexing member comprises a co-acting abutment structure disposed in a position to be contacted by the spring clip or other stop carried on the piston. The continuously variable coupling preferably comprises a threaded interconnection between the indexing member and the pump body or a coupling member carried by the body. In a particular preferred embodiment, the threaded connection just noted is implemented by cooperating structures which provide a Vernier-type readout such as that utilized in micrometers, in which an internally threaded barrel-like member has an end extremity which is movable along and relative to an underlying series of indicia, providing a desirable visual indication of the different positions of adjustment resulting from variation of the threaded engagement.
摘要:
A lubricator pump having a replaceable cylinder piston assembly is disclosed for replacement or interchangeability with cylinders having different piston sizes. The interchangeability of the cylinder piston assembly allows for different lubricant output.
摘要:
An actuation device for a tachometer adapted to transmit the revolutions of an engine crankshaft to the tachometer, wherein the oil pump of the engine is utilized as a speed reducing mechanism for transmitting the revolutions of the engine crankshaft to the tachometer after the engine speed is reduced. A cable connected at one end to the plunger of the oil pump whose speed is reduced by means of a gearing is connected at the other end to the tachometer. Thus, by utilizing the oil pump, it is possible to transmit the revolutions of the engine crankshaft to the tachometer without requiring a speed reducing mechanism provided exclusively for the tachometer.