摘要:
In one aspect, there is provided a damper control system for a reciprocating pump assembly according to which control signals are sent to electromagnets. In another aspect, there is provided a method of dampening vibrations in a pump drivetrain according to which a beginning of torque variation is detected and at least a portion of the torque variation is negated. In another aspect, signals or data associated with pump characteristics are received from sensors, torque characteristics and damper response voltages per degree of crank angle are calculated, and control signals are sent to electromagnets. In another aspect, a damper system includes a fluid chamber configured to receive a magnetorheological fluid; a flywheel disposed at least partially within the fluid chamber and adapted to be operably coupled to a fluid pump crankshaft; and a magnetic device proximate the flywheel. The magnetic device applies a variable drag force to the flywheel.
摘要:
This invention seeks to replace traditional brakes with a safer and more economical design. The traditional design uses friction to slow a vehicle, while the proposed design uses hydraulic fluid to slow down the motion of a vehicle. The rotor blade, whose design is shown in FIG. 1B, is mounted upon the bearing and is housed with the hydraulic fluid in the housing in FIG. 1A.
摘要:
A braking arrangement for drive heads or pump heads, to be preferably used in a progressing cavity pump (PCP) system in oilfields, consisting of at least one disk moving inside a viscous fluid and facing a static disk, in which mechanical energy is transformed into heat. The viscous brake is a device acting as a function of the rotation speed, in which a higher speed generates a higher braking power caused by the increase of friction among the disks and the fluid. The arrangement may comprise more than one mobile and static disk assemblies, as well as a hollow axis instead of a solid one, to allow housing the pumping rod inside the axis, and may also comprise an anti-reverse bearing.
摘要:
A damper device includes a stator, a rotor, and a viscous fluid imparting a resistance to a rotation or a relative rotation of the rotor, and forms a braking force by the resistance. In the rotor, an annular seal portion made of soft synthetic resin is provided by integral molding. The stator includes an annular space in which the viscous fluid is filled, and a main member portion of the rotor is housed in the annular space. The annular seal portion comprises an outside annular portion provided in an outer circumferential portion of the rotor; an inside annular portion provided in an inner circumferential portion of the rotor; and a connection portion therebetween.
摘要:
A rotational speed control device maintains a shaft rotation speed. The device includes a housing containing a viscous fluid and a shaft disposed in the housing and rotatable relative to the housing. A rotor is coupled with the shaft for rotation in the viscous fluid. In one arrangement, the rotor is axially displaceable along the shaft between a low-shear position and a high-shear position. A spring mechanism is disposed in the housing and biases the rotor toward the low-shear position. In another arrangement, the rotor may be designed to cooperate with the housing or other nonrotating features within the housing to vary a shear gap according to radially expanding components of the rotor. The rotor, housing and spring mechanism can be designed to cooperate to create large changes in braking torque in response to small changes in shaft rotational speed. This allows the rotation speed to be controlled within a relatively narrow range.
摘要:
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, comprising a drive motor whose power output is controlled via an actuator such as a foot pedal or a lever; whereby in an overrun operation the acceleration of the motor vehicle is collected or detected and compared with a pre-specified acceleration value; and whereby in the non-braking mode the disconnect clutch is engaged, regardless of an initiation of a braking mode by an operator of the motor vehicle or a driver assist system and the working chamber is maintained drained when the acceleration exceeds an acceleration limit.
摘要:
A method of operating a hydraulic retarder including directing fluid from a retarder pump to the retarder when the retarder is turned on. Fluid from a main pump is directed to a torque converter, which fluid is directed to at least one of a lube operation, a tank or a cooler when the retarder is turned off. Fluid from the main pump by way of the torque converter is directed to the retarder when the retarder is on, but not filled, and to the tank or the lube operation when the retarder is filled.
摘要:
In one aspect, the present invention is directed to a vehicular brake (10) comprising: a closed-circuit tunnel (14, 62) containing hydraulic liquid (72); a mechanism (22) for moving the hydraulic liquid (72) within the closed-circuit tunnel (14, 62) together with the wheel (30) of the vehicle; and at least one faucet (24) within the closed-circuit tunnel (14, 62), for reducing the cross-section area (from A1 to A2) of the closed-circuit tunnel (14, 62) at least at one location, upon braking activity, thereby braking the vehicle wheel (30) without friction wear.
摘要:
A rotary damper comprises a casing fixable to a structure and which comprises a wall which surrounds a chamber filled with a viscous fluid and has an inner surface facing the chamber. A cover is mounted and welded on a shoulder surface of the wall of the casing in such a way as to close the chamber in a sealed manner. A rotor which is mounted rotatably on the casing and comprises a disc portion, adapted to rotate within the chamber, and has a shaft portion extending axially from the disc portion and emerging through the cover so as to be operationally associable with a movable member. The cover has peripherally a collar-like protuberance, extending along the entire perimeter of the cover and coupled to the inner surface of the wall of the casing in such a way as to oppose the infiltration of the viscous fluid between the collar-like protuberance and the inner surface of the wall.
摘要:
A system for stabilizing a water brake including at least two rotor disks, a chamber of the water brake for containing water positioned between the at least two rotor disks, a pressure measuring device for measuring a partial pressure in the chamber, and an air injection device for injecting air into the chamber to increase the partial pressure in the chamber.