39results about How to "Increase peripheral speed" patented technology

The invention relates to an embedded micro streamline axial flow blood pump, which can be used for assisting blood circulation of failed heart. The blood pump comprises a pump body arranged in a sleeve body and a driving device arranged outside the pump body, wherein the pump body comprises the sleeve body, a front guide vane, a rotor and a back guide vane; the hubs of the front guide vane, a rotor and the back guide vane are designed integrally in an integral streamline form; and the front half part of the rotor is provided with an inductive blade. The blood pump can reduce the on-way pressure loss of the blood in the flow channel of the blood pump, improve efficiency and reduce hemolysis; and can promote the circumferential speed of the blood after entering into a rotor area due to the inductive blade arranged on the front half part of the rotor, and avoids the occurrence of vacuole phenomenon.

In order to improve a flatness of a work in single wafer type double-side polishing in which one wafer is polished with one carrier, a carrier larger in diameter than upper and lower surface plates that rotate is inserted between the surface plates, and a wafer smaller in diameter than the surface plates is held with the carrier. The carrier is rotated by plural eccentric gears that mesh with external gear teeth formed on the outer peripheral surface of the carrier at plural positions along a circumferential direction thereof and revolve around positions spaced from the centers as centers in synchronism with each other or one another at the plural positions of meshing. The carrier rotates about its center and moves circularly around the center of the surface plates spaced from the center thereof. The upper surface plate is reciprocated in a direction perpendicular to the central axis when required. Geometrical motion loci of points on the wafer are complex and peripheral speeds alter to large extents to thereby enhance equalization of peripheral speeds of points on the wafer to a higher level to thereby improve a flatness.

The invention relates to a split blade hydraulic-magnetic transmission well hole cleaning tool, which consists of a flow tube casing, a rotating magnetic core, an upper gauge protection body and a rotating blade, wherein the gauge protection body is arranged in a position, near the external screw thread part, of the outer wall of the flow tube casing, the outer wall of the flow tube casing is also provided with a position limiting ring, the upper gauge protection body is arranged at one side of the position limiting ring, the rotating magnetic core is integrally formed by a rotating tube and a rotating shaft, a transition connecting section of the rotating tube and the rotating shaft is provided with a drilling fluid hole, a hydraulic conversion device is fixedly arranged outside the rotating shaft, permanent magnets are uniformly distributed on the outer wall of the rotating tube, the two adjacent permanent magnets have the opposite magnetic pole directions, a rotating magnetic core is arranged in the flow tube casing, permanent magnets are uniformly distributed on the inner wall of the rotating blade tube body, and the two adjacent permanent magnets have the opposite magnetic pole directions; the hydraulic conversion device is a double-layer tubular body, and an axial pressure difference blade is arranged between the two layers of tubes; the rotating blade is split and dismountable. The split blade hydraulic-magnetic transmission well hole cleaning tool has the advantages that through the hydraulic-magnet coupling transmission, the limitation by the condition whether a drill rod rotates or not is avoided, the hydraulic-magnetic coupling transmission is realized under the condition of drilling fluid circulation, and the well hole cleaning efficiency is improved.

The invention relates to a sulfur tail gas super-gravity desulfurization device and process thereof. The sulfur tail gas super-gravity desulfurization device comprises an alkali liquid storage tank and a super-gravity machine; the device utilizes alkali liquid to desulfurize sulfur tail gas, and a unique super-gravity machine structure is provided; in the structure, a hollow rotary shaft with a fluid channel is formed in a shell in a manner of penetrating through the middle axis of the shell, and a sleeve with a gas channel function sleeves the hollow rotary shaft; meanwhile, a rotary channel, which is communicated with a filling region and is provided with a spiral channel, is also formed on the basis; fluid passes through the hollow rotary shaft and then self rotation of the fluid is realized through the rotary channel, and then the fluid enters the filling region; the liquid is crushed and torn into small liquid drops under the action of a centrifugal force of liquid and is in sufficient contact with liquid reverse-flow small bubbles, and a phase interface, which is rapidly updated, is provided; crushing and tearing mixing of the fluid and gas is further realized by utilizing the self-rotation under a rotary state; the sufficient degree of gas-liquid contact is improved, and furthermore, the better sulfur tail gas desulfurization effect is obtained.

Described is a method for operating a positioning vehicle for positioning a test probe in defined intervals along a travel line, as well as to a positioning vehicle for carrying out the method. The positioning vehicle contains a traveling vehicle base part with a guide device and with a test probe carrier guided by this guide device in a guide. The guiding has a first reversal point and a second reversal point. The guide device comprises guide means in order on displacing the vehicle base part to guide the test probe carrier in the travel direction up to the first reversal point after it has reached the second reversal point, and in order to lead back the test probe carrier opposite to the travel direction up to the second reversal point after it has reached the first reversal point. In the phase of the return, the test probe carrier relative to the vehicle base part has the negative speed of the vehicle base part. Described is also a device which permits in particular objects having large surfaces to be scanned with little effort.

The invention discloses an air inlet ventilation structure used for an aircraft auxiliary power system. The structure comprises an aircraft auxiliary power system cabin (1) and an air inlet channel (2) which is formed in the aircraft auxiliary power system cabin. An auxiliary power system body (3) is arranged in the aircraft auxiliary power system cabin and communicates with the air inlet channel. A closed type annular guide channel (5) is formed in the inner wall of the aircraft auxiliary power system cabin. A cat ear air inlet (4) is formed in the aircraft auxiliary power system cabin and communicates with the guide channel. Diversion spray nozzles (6) are arranged in the positions, perpendicular to the aircraft auxiliary power system cabin, of the guide channel, are located at the side, close to the auxiliary power system body, of the guide channel, and communicate with the guide channel. According to the air inlet ventilation structure provided by the invention, a single cooling air inlet is changed into a plurality of cooling air inlets based on a prior air inlet ventilation structure, and flowing and heat exchanging in the auxiliary power cabin are optimized.

The invention relates to a method for controlling a wheel rotational speed of a wheel of a drivable axle of a two-track vehicle having two drivable axles and a corresponding vehicle, wherein the vehicle has a first drive motor for driving the first axle, a second drive motor for driving the second axle, a device for sensing driving state variables, and a control device. The method comprises the following steps: determining an actual rotational speed of the first axle, determining a target rotational speed for the second axle in dependence on the actual rotational speed of the first axle, and controlling the second drive motor in such a way that the determined target rotational speed is set at the second axle. In order to determine the target rotational speed, a synchronous target rotational speed at which the same wheel circumferential velocity is set at at least one wheel of the second axle as at the wheels of the first axle is determined in dependence on the actual rotational speed of the first axle. The target rotational speed for the second axle is then determined in dependence on the determined synchronous target rotational speed.

The invention relates to an integral vane hydraulic-magnetic driving borehole cleaning tool. The integral vane hydraulic-magnetic driving borehole cleaning tool consists of a flow barrel shell, a rotary magnetic core, an upper gauge protection body and a rotary vane, wherein the outer wall of the flow barrel shell is provided with a lower gauge protection body and a spacing ring; the upper gauge protection body is installed on one side of the spacing ring; the rotary magnetic core is integrally formed by a drum and a spindle; a transition connection section of the drum and the spindle is provided with drilling fluid holes; a hydraulic conversion device is fixedly arranged out of the spindle; the outer wall of the drum is evenly provided with permanent magnets; every two adjacent permanent magnets have opposite magnetic pole directions; the rotary magnetic core is installed in the flow barrel shell; the rotary vane sleeves the flow barrel shell; the outer wall of the flow barrel shell is also provided with a bearing raceway which corresponds to a bearing raceway of the rotary vane; a rolling body is installed in the bearing raceways; the outer wall of the flow barrel shell is also provided with a seal groove; the rotary blade is integrated; the inner wall of a drum body of the rotary blade is evenly provided with the permanent magnets; every two adjacent permanent magnets of the rotary blade have the opposite magnetic pole directions; the outer wall of the rotary vane is also provided with a storage oil sealing and compensating system. The integral vane hydraulic-magnetic driving borehole cleaning tool is free from the limitation whether a drill pipe rotates or not through hydraulic-magnetic coupling driving, and therefore, borehole cleaning efficiency can be drastically improved.

In the present invention, a plurality of protrusions (152) are formed by being arranged at intervals of 0.3-2.6 mm in the circumferential direction, on seal lips (151) of seal members (150). An oil passage (170), which interconnects a bearing inner space (160) and the outside and through which it is impossible for foreign matters of a prescribed particle size to pass, is generated between a seal sliding surface (112) sliding in the circumferential direction with respect to the protrusions (152), and the seal lips (151). Accompanying the rotation of a bearing, due to a wedge effect when the protrusions (152) draw lubricating oil into the oil passage (170) between themselves and the seal sliding surface (112), formation of an oil film is promoted between the seal lips (151) and the seal sliding surface (112), resulting in a fluid lubrication state.

The invention relates to a supergravity oxidation machine, a sulfur recovery tail gas treatment device and a process. The supergravity oxidation machine is characterized in that a hollow rotating shaft with a fluid channel is arranged on the central axis of a shell and penetrates through the shell, and a sleeve with a gas channel function sleeves the hollow rotating shaft; meanwhile, a rotating channel which is communicated with the packing area and is provided with a spiral channel is formed on the basis, self-spinning entering of fluid is achieved after the fluid passes through the hollow rotating shaft and then passes through the rotating channel, and the circumferential speed is increased under the rotating acting force, the shearing force and the self-spinning acting force of the fluid at the moment when the fluid enters the packing area; and the generated centrifugal force pushes the fluid to the outer edge, and the gas with oxidizing capacity is crushed, torn and mixed in the filler area, so that the gas-liquid contact sufficiency is improved, and a very good liquid oxidizing effect is obtained. In addition, the sulfur recovery tail gas treatment device and process can effectively reduce the sulfur content in the acid gas.

The invention discloses a radial flow type rotating mechanical impeller. The radial flow type rotating mechanical impeller comprises an impeller body, and a plurality of main blades and a plurality ofedge blades are arranged on the back surface of the impeller body. The main blades are uniformly distributed on the back surface of the impeller body in the peripheral direction of the impeller body,and the main blades are arranged in a protruding mode. The edge blades are uniformly arranged between the inlet sections of the adjacent main blades in the peripheral direction, and the edge blades are arranged in a protruding mode. According to the radial flow type rotating mechanical impeller, the blade consistency in an area with a larger radius on the back portion of the impeller body is significantly increased, meanwhile, the increase of the blade consistency of an area with a smaller radius is avoided, so that the circumferential velocity increases rapidly after leakage fluid enters a back clearance of the impeller body, the circumferential velocity of the leakage fluid further increases with the decrease of the radius under the drive of the blades on the back portion of the impeller body, the pressure is reduced at the same time, the reduction of fluid pressure in the area with the larger radius facilitates the reduction of the axial force on the back portion of the impeller body, and the axial force of the impeller body is balanced.

The invention relates to a filling device (1) for a packaging machine and to a packaging machine having a filling device that includes a filling channel (2) and a controllable channel closure (3) in order to control the flow through the filling channel of a bulk material (5) to be filled into a valve sack (4). The channel closure comprises a pivotable closure element (6) which is arranged within the filling channel and the pivot axis (7) of which extends transversely with respect to the filling channel in such a way that, when closed, the channel closure completely closes the filling channel and, when fully open, completely opens the filling cross section.

The invention relates to a method and a device for melt-blowing, forming and plaiting finite fibres to produce a fibrous nonwoven. Here, the fibre streams which are produced by a melt-blowing die and a hot air flow are blown into a forming gap of a forming element, wherein the fibres are joined together within the forming gap to produce a fibre composite. In order to influence the filling and the forming of the fibres within the forming gap directly below the melt-blowing die, according to the invention the fibres are freely guided substantially vertically from the melt-blowing die as far as the forming gap via an adjustable blowing section, wherein the adjustability of the blowing section lies in the range from 100 mm to 2000 mm. In this way, both very fine fibres and coarse fibres can advantageously be formed to produce a loose fibre composite.

Disclosed are a method and a device for continuously winding up several threads to bobbins. According to the invention, the bobbins are simultaneously retained and wound on two driven bobbin spindles (7.1, 7.2). Each of the bobbin spindles (7.1, 7.2) is disposed on two rotatably mounted bobbin revolvers (10.1, 10.2) which are provided with two additional driven bobbin spindles (11.1, 11.2) for taking over the threads and continuing the winding process. During the winding process, the threads are fed to the bobbins by means of two pressing rollers (6.1, 6.2) which are allocated to the bobbin spindles and rest against the circumference of the bobbins. In order to ensure that all threads are pulled as uniformly as possible off a device that is mounted upstream when changing bobbins on both bobbin spindles (11.1, 11.2), the pressing rollers (6.1, 6.2) are driven at a thread-guiding circumferential speed which is greater than the circumferential speed of the bobbins of both bobbin spindles (11.1, 11.2) when changing the bobbin spindle. To this avail, both pressing rollers (6.1, 6.2) are driven by a joint roller drive unit which is connected to a control device (21) that controls the rotary drive of the bobbin revolvers (10.1, 10.2).

The invention discloses a labyrinth seal for optimizing the dynamic characteristics of a rotor based on inter-tooth anti-rotation plates. The labyrinth seal comprises a sealing stator and a sealing rotor, and a plurality of groups of anti-rotation plate structures are arranged on the wall surface of the sealing stator and located between sealing teeth. Each group of anti-rotation plate structures are evenly distributed in a circumferential direction and deflect in a reverse rotation direction on the meridian plane, so that an airflow can flow to the downstream in the reverse rotation direction through flow guiding of the anti-rotation plate structures. Meanwhile, sealing gaps of upstream sealing teeth and/or downstream sealing teeth adjacent to the anti-rotation plate structures can be changed, so that a radial height of an inter-tooth jet flow is increased. A circumferential rotational flow generated by inlet pre-rotation and rotor rotation in the seal has a great promotion effect on tangential airflow exciting force generated by cross stiffness in a same direction as rotation, and rotor instability can be caused. The labyrinth seal disclosed by the invention can achieve the purposes of weakening the circumferential rotational flow in a sealing cavity, weakening the cross stiffness and enhancing the sealing stability and can well meet the dynamic characteristic requirement of the labyrinth seal rotor so as to improve the turbine operation stability.

Methods for making hydrodynamic bearing devices are provided. The method can effectively increase the peripheral speed when grinding the axial element which is the structural element of the hydrodynamic bearing device, and can prevent centrifugal rotation to improve grinding efficiency and work efficiency, and improve product quality at the same time. An axial member serving as a structural member of a hydrodynamic bearing device is supported at both ends in surface contact using a pair of plate members while rotating the axial member about its axis. The peripheral surface of the axial portion of the axial member is ground on a grinding stone while supporting the peripheral surface of the axial portion with a supporting member. Furthermore, the plate member which is in surface contact with the flange portion of the axial member is formed with at least one turned-out portion in a predetermined area of ​​the center of rotation of the contact surface thereof. In addition, the contact portion of the plate member with the flange portion is elastically supported by an elastic member.