31results about How to "Balance radial force" patented technology

A wind turbine includes a rotary shaft having an axis of rotation, a plurality of turbine blades supported for rotary motion by the shaft, and a plurality of magnets supported by and spaced outwardly from the rotary shaft. The blades are mounted to the shaft by a mount that is radially inward of the magnets wherein the magnets have an annular velocity of at least the annular velocity of the blades. The turbine also includes a conductive coil, which is located outwardly from the magnets and the blades, wherein the coil surrounds the magnets and the blades and which is sufficiently close to the magnets such that rotary movement of the magnets induces current flow in the coil.

The invention relates to a method for optimizing a dummy plate of a double-volute type double-suction pump and a product produced with the same. The method comprises the following steps of: respectively carrying out three-dimensional modeling and grid dividing by selecting the double-volute type double-suction pump formed by a plurality of starting positions and stopping positions of the dummy plate; guiding the divided grid model into ANSYS-CFX software to carry out numerical simulation to obtain a flux-lift and flux-efficiency curve graph of the double-volute type double-suction pump and a single-volute pump and a flux-dependent impeller radial force distribution graph under each starting position and each stopping position; by analyzing the curved graph and the distribution graph, selecting the starting position and the stopping position which correspond to the curve representing the minimum impeller radial force as the starting position and the stopping position of the dummy plateof the double-volute type double-suction pump correspondingly, wherein the curve representing the minimum impeller radial force is one curve of all flux-lift and flux-efficiency curves of the double-volute type double-suction pump, which is very similar to a flux-lift and flux-efficiency curve of the single-volute pump; and adopting arc transition between the starting position and the stopping position, wherein the curvilinear equation for the arc transition is a log spiral equation, thus the optimization is finished.

A flow modulation valve has a slidably translating hollow armature with at least one energizable coil wound around and fixably attached to the hollow armature. The energizable coil or coils are influenced by at least one permanent magnet surrounding the hollow armature and supported by an outer casing. Lorentz forces on the energizable coils which are translated to the hollow armature, increase or decrease the flow area to provide flow throttling action. The extent of hollow armature translation depends on the value of current supplied and the direction of translation depends on the direction of current flow. The compact nature of the flow modulation valve combined with the high forces afforded by the actuator design provide a flow modulation valve which is highly responsive to high-rate input control signals.

Present invention relates to dredge pump for sewage treatment, especially a vertical type disintegrable self-suction dredge pump. It features designing impeller as wide-open type structure for increasing pump ability and raising engine efficiency, said wide-open type impeller combined with blade effectively balancing axial force and radial force, topping mechanism set in pump body effectively disintegrating blocky-shaped particle and long fiber substance, setting exhaust valve on pump outlet for exhausting out vapour generated in separating vapour and liquid, setting solenoid valve on pump body suction inlet for preventing siphon affect sucking up water in pump body. Said invention has reasonable structure, compactness, reliable operation, combining disintegrating, exhausting, siphon prevention, and pumping function, and can be widely used in sewage treatment, sewage transference containing easy disintegrating solid particles and long fiber, and ship.

The invention relates to an easily controlling hydraulic corner self-servo valve which is characterized in that a blade (15) is arranged on the outer wall of a hollow column body (35) of a valve body (7); the initial assembly position of the blade (15) is in axis symmetric arrangement with that of a fixed baffle block (5); a valve sleeve (8) is arranged in a the hollow column body (35), and a valve core (8) is arranged in a small hollow circle (34) of the valve body (7); a high pressure oil inlet P and a low pressure oil outlet T of a left end cover (1) are respectively communicated with high and low pressure outer oil annular slots (31 and 28) of the valve body (7) correspondingly through high and low pressure oil channels (2 and 17) of a cylinder body (6); high and low pressure inner oil annular slots (32 and 30) of the valve body (7) are correspondingly communicated with core body high and low pressure oil annular slots (39 and 40) of the valve core (9); and core body high and low pressure oil channels (38 and 41) enter a first working chamber and a and second working chamber correspondingly through upper and lower semi-circle oil annular slots (36 and 37) of the valve sleeve (8). According to the invention, the easily controlling hydraulic corner self-servo valve has the characteristics that the preparation is convenient, the radial force and the axial force subjected by the valve core are both balanced, the resistance of the valve core is low, the dynamic characteristics are good, and the servo blind area is small.

The invention discloses a boric acid delivery pump for a nuclear power station. A volute chamber has a double volute structure, so that radial force generated during the operation of an impeller is effectively balanced; a pump cover seal has a single-end-face containerization type mechanical seal structure, is convenient to assemble, disassemble and maintain and can effectively prevent media fromleaking outwards; a bearing oil seal has a labyrinth seal structure, so that an ideal sealing effect is achieved; a cooling cavity on a pump cover is eliminated, and the axial length of the pump cover is shortened, so that the integral pump set has a compact structure, and the space for installation and maintenance is effectively reduced; a sealing structure formed by combining a pump seal with an impeller seal is changed into a single pump body sealing structure, so that the delivery pump has a simple and reliable structure and is convenient to mount and maintain; and a supporting rib plate is arranged on a bearing bracket, so that the stability of the pump set is improved.

The invention relates to a co-rotating twin-screw transmission device using an oil motor, which belongs to the field of plasticizing extrusion molding. The two output gear shafts of the present invention are horizontally and parallelly arranged in the center of the transmission box body, and the transmission gears on it are arranged in a front and rear misalignment, and the front ends of the two output gear shafts are used as the drive shafts of the twin screws; Two transition gear shafts are respectively arranged on both sides, and each transition gear shaft is fixed with two front and rear transmission gears. The last two transmission gears of the transition gear shaft are engaged with the transmission gears of the other output gear shaft at the same time; the two input gear shafts drive the two transition gear shafts respectively through the oil motor; the present invention enables the twin screws to rotate in the same direction, In addition, the torque received by the output bearing is greatly improved, and the radial force of the output shaft is balanced.

A helical double-arc gear hydraulic gear pump supported by axial and radial static pressure. The hydraulic gear pump includes a pump body, a driving gear shaft and a driven gear shaft; The end cover, the driving gear shaft and the driven gear shaft are all supported in the pump body through radial hydrostatic bearings; the axial force bearing ends of the driving gear shaft and driven gear shaft are all installed on the rear end cover through thrust sliding bearings , the other end of the driving gear shaft protrudes from the front end cover. In the gear pump, the floating sleeve and the journal of the gear shaft form a radial static pressure sliding bearing, and the thrust sliding bearing and the end face of the gear shaft form a thrust static pressure sliding bearing. The static pressure formed by the floating sleeve and the thrust sliding bearing The pressure sliding bearing supports the gear shaft and bears the radial force and axial force of the gear shaft. The friction surface is mainly lubricated by hydrostatic pressure, which can not only balance the axial force and radial force of the gear shaft, but also significantly reduce friction power consumption and The wear of the contact surface prolongs the service life of the gear pump.

The invention discloses a method for self-balancing radial force of a single-blade centrifugal pump, comprising the following steps: S1. According to CFD numerical simulation, a method of eccentricity of the rotation center of the impeller is used to improve the symmetry of the circumferential distribution of the flow field in the single-blade centrifugal pump, At the same time, the size and position of the eccentricity of the rotation center of the impeller determined based on CFD numerical simulation and experimental measurement; S2, combined with CFD numerical simulation and experimental measurement to determine the position of the center of gravity and the required centrifugal force, according to the calculated centrifugal force, use the center of gravity Off-centre of rotation produces a suitable centrifugal force, which is used to balance the radial forces. The method of the invention balances the radial force generated when the pump is running, and improves the running stability and reliability of the pump; the method is fast and convenient, can greatly reduce the time consumed in the processing of the impeller counterweight, and improve the counterweight efficiency.