Abstract:
A rotating disc filter (10) has a plurality of sectors (20) removably mounted on drainage and support structures (14) which are fixed on a rotating hub (16). The drainage and support structure (14) has flow channels (36) and internal baffles (52, 54) which serve to trap filtrate to keep filtrate from re-wetting filter cake built up on the sectors (20) prior to removal of the filter cake from the sectors.
Abstract:
A rotating disc filter has a plurality of discs, each made of a plurality of sectors (20) removably mounted on support structures (14) which are fixed on a rotating hollow shaft (16) into core drainage channels (18) of which, the sectors drain. The drainage and support structure has flow channels (55) designed to rapidly drain filtrate and to permit filtrate split between clear and fiber bearing fractions. Rapid drainage is made possible by a novel method and device for controlling fluid transit volume within the sectors.
Abstract:
A hydrodynamic device for generating negative pressure excursions in a pulp slurry during fine screening, includes at least one half-foil member (123) disposed on a substantially cylindrical outer surface of a rotor (121). The rotor (121) is mounted within and co-axial with a substantially cylindrical screen (95) having a circumferentially continuous apertured zone to define an annular screening chamber (93) between the rotor (121) and the screen (95). The half-foil member (123) is collectively at least axially co-extensive with the apertured zone and has a leading edge which, also collectively, is inclined at a spiral angle (33) relative to the axis of the rotor (121) such that, in one embodiment, during rotation, the leading edge of the half-foil member (123) conducts large particles downwardly through the screening chamber (93). A selection of hydrodynamic foil configurations is provided in order to adapt to a wide range of pulp types and screening conditions.
Abstract:
A spacer (70) of a desired thickness sets the clearance between an end face (20) of a fluid displacement device rotor and an end plate (24) of a fluid displacement device housing. Initially the spacer (70) is located on either the end face (20) or the end plate (24). The end face (20) is then positioned adjacent said end plate (24). Next, the rotor is axially displaced relative to the housing to a desired position wherein the spacer (70) is in contact with both the end face (20) and the end plate (24). Finally, the rotor is secured in said desired position.
Abstract:
A device for cleaning and lubricating an exterior surface of an asphalt compacting machine (1) includes a support member (9) removably attached to the machine (1). Positioned on the support member (9) for easy access are a flexible scraper (101) for cleaning the drum (3) and a fluid spray system (51), for spraying and uniformly distributing a lubricating fluid onto the drum (3). Elastic spring means (10) on the support member assures positive contact between the drum (3) and the scraper (101) and between the drum (3) and the fluid distributor.
Abstract:
A fluid connection and control device for fluid machines permits fluid inlet or outlet connections without the necessity for threaded adapters. This is accomplished by a radially symmetrical body (25) having first and second ends and a central axial fluid passage (28) connecting the ends. The body is appropriately sized for the fluid channel of the fluid machine and has a provision (22) at the first end for attachment of a flexible hose (20). The second end has a provision for a fluid tight seal between the body and the fluid channel as well as a mechanism by which the body is captured within the fluid channel (15) of the fluid machine. Options are provided for incorporation of a valve mechanism (33) for controlling the fluid flow. The valve mechanism may be incorporated as an integral part of the body or as a separate modular unit (fig. 3) which is retained in the fluid channel (15) by the connector body (25). This provides the advantages of rapid assembly and avoidance of undue stresses to the fluid machine housing, and also provides flexibility of the hose directly adjacent the housing which contributes to improved maneuverability.
Abstract:
A torque transducer capable of installation in the housing (100) of a rotating machine, having a limited axial space therefor, has a disk shaped first member (14) fixed to a fixed portion of the housing. A disk shaped second member (16) has splines on its inside diameter which provide a sliding coupling with the first member. Splines on the outside diameter of the second member provide sliding connection to a floating portion (18) of an output drive train which coupling transfers reaction torque back from the output shaft (21), through the drive train, and into the second member. Shear webs are formed between the inner and outer diameters of the second member by removing some material to form torsion concentrator voids. Strain gages mounted on the shear webs and bridged with appropriate resistors provide an output signal in response to torsional strains imposed on the second disk shaped member. The output signal is routed to a calibrated signal processor and relay control unit.
Abstract:
An illustrative embodiment of the present disclosure provides hand-held power tool which includes a housing, a motor, and an output spindle. The housing supports a motor having a rotor configured to rotate when the motor is supplied with power. The output spindle protrudes from an output end of the housing, and is functionally coupled to the rotor such that the output spindle rotates in response to a rotation of the rotor. The housing also supports at least one electrical accessory that is connectable to an external power connector located on the housing.
Abstract:
A power tool is provided that, in one version, includes a front housing that supports an output drive, and a back cap located opposite the front housing. The back cap receives at least one fastener of the plurality of fasteners. A motor housing supports a motor and is located between the front housing and the back cap. The motor includes a rotor that is configured to rotate about a motor axis to drive rotation of the output drive. The fastener is disposed through the back cap, and secures to the front housing coupling the front housing, the motor housing, and the back cap together.
Abstract:
Illustrative embodiments of positive displacement pumps utilizing pressure compensating calibration, as well as related systems and methods, are disclosed. In one illustrative embodiment, a method of operating a positive displacement pump includes sensing, with a pressure sensor disposed at a fluid outlet of the positive displacement pump, a back pressure at the fluid outlet, transmitting a pressure signal associated with the sensed back pressure from the pressure sensor to a controller of the positive displacement pump, and identifying, on the controller, a volume of fluid pumped by the positive displacement pump using the pressure signal.