176results about How to "Change gap" patented technology

The inductive position sensor includes a scale (10) with a series of conductive loops spaced out by a pitch T and a cursor (20) provided with conductors forming each a series of alternating hairpin turns spaced out by a pitch T, the inducing (21 to 23; 42, 44) and induced (31 to 33; 41, 43) cursor conductors are laid out in two separate interlaced conductor groups, coupling between inducing and induced conductors of the second group taking place only via the scale loops. Such a sensor is simple, robust, accurate, insensitive to external electromagnetic fields and tolerant of misalignment between cursor and scale.

The invention discloses a hydraulic loss testing platform and testing method of a canned motor rotor system. The platform comprises a variable frequency motor, a coupling, a canned motor, a static tube, a flow meter, a pressure sensor, a motor pallet, a circulation pipeline, a supporting bracket and a seal ring. According to the invention, a canned motor is dragged and simplified by an external variable frequency motor, thereby eliminating the canning loss of the canned motor; the pressure difference generated by an auxiliary impeller is obtained by the pressure sensor, and the flow through the middle part of the auxiliary impeller is obtained by the flow meter, thereby separating quickly the power loss of the pressure flow of the canned motor; a replaceable auxiliary impeller is mounted at the middle part of the canned motor pump rotor, so at to regulate the amount of the pressure flow; and the clearance between the rotor and the stator of the canned motor pump is changed by replacing a sleeve of the stator, and the impact of different clearances on the power loss of the pressure flow and the shear flow of the canned pump can be studied. By using the hydraulic loss testing platform and testing method provided by the invention, the hydraulic loss of the canned motor can be obtained, which provides reference for the structural parameter optimization of the canned motor.

The invention discloses a radial-clearance-adjustable permanent magnet speed regulation device. The speed regulation device is characterized by comprising a first barrel-type rotation assembly and a second barrel-type rotation assembly, wherein the first barrel-type rotation assembly and the second barrel-type rotation assembly are coaxially installed, and the outer surface of the second rotation assembly is provided with a permanent magnet or an electric conductor; the speed regulation device further comprises a push-pull sleeve connected with the permanent magnet or the electric conductor, and one end of the push-pull sleeve is connected with a clearance adjustment device. The speed regulation device is small in overall size, light in weight and large in transmission torque; a speed regulation mechanism is simple, and the radial clearance can be regulated in a labor-saving mode; the air-gap size can be changed, and also the coupling area can be changed.

In order to balance different thermal expansions caused by thermal instability, the gas turbine of the present invention has a relatively movable guide part (14/15) in the axial direction, which surrounds a funnel-shaped gas channel (7) from the outside. In order to obtain an optimum working blade tip clearance, the invention proposes that at least one funnel-shaped guide part (14/15) can be moved axially controlled by a motor. By means of this axial movement, and due to the funnel-shaped configuration of the guide part, the width of the gap between the tips of the rotor blades can be varied.

This invention relates to method for shaping the strip semi-conductive laser by using the refracting and reflecting prism stack, which is characterized by the following: (1) using one or several parallel plats to split slow axial light spot of the strip semi-conductive laser; (2) using a group of stepwise reflecting prism stacks to align the splitting spots along the fast axial for the purpose of shaping the light beam.

The invention relates to the technical field of PVC tube recycling, in particular to a PVC tube recycling pulverizer with a drying function. By adopting dual-stage pulverizing, according to first-stage pulverizing, a rotating shaft drives a spiral packaging auger to work, PVC tubes are pulverized while being conveyed, then, a pulverizing roller inside a second-stage pulverizing cylinder is adoptedfor secondary pulverizing, and the pulverizing efficiency is ensured; a storage pipe is connected to the discharging end of the primary pulverizing cylinder, a drying assembly is arranged at one sideof the storage pipe, and the preliminary pulverized PVC tubes fall into a storage tube, a fan heats air through a heating cavity and is introduced into the storage tube, and the PVC tube is dehumidified and dried; a drive motor drives a driving shaft to rotate, a driving bevel gear and a driven bevel gear act to drive the driven shaft to rotate, a connecting rod drives a push-pull rod to reciprocate, the push-pull rod periodically collides with the secondary pulverizing cylinder, PVC particles stuck to the cylinder wall are shaken down, and resides are reduced.

The invention discloses a copper strip surface degreasing device, which comprises a container containing cleaning agent. The container and a frictional cleaning device are fixed in a box body. The container is provided with a conveying device conveying the cleaning agent to the frictional cleaning device. The frictional cleaning device comprises an upper friction body and a lower friction body, between which a gap is left for the end part of a copper strip to insert. The invention can clean the greasy dirt accumulating on the surface of the copper strip thoroughly and has the advantages of clean cleaning and high efficiency.

The invention discloses an impact crusher for ore mining. The impact crusher for ore mining comprises a housing, wherein a bottom plate is fixedly connected to the lower end surface of the housing; afixing mounting plate is fixedly connected to the side end surface of the housing; a transmission wheel is rotatably connected to one side, deviated from the fixing mounting plate, of the side end surface of the housing; a conveyor belt is rotatably connected to the outer end surface of the transmission wheel; a motor is rotatably connected to the inner end surface of the conveyor belt; a detecting door is rotatably connected to one side, deviated from the transmission wheel, of the side end surface of the housing; a fixing block is fixedly connected to one side, deviated from the detecting door, of the side end surface of the housing; a feeding port is formed in the upper end surface of the housing; a conveyor belt protecting body is in sliding connection with the upper end surface of thebottom plate; a discharging port is formed in the lower end surface of the housing; a rotating shaft is fixedly connected to the side end surface of the transmission wheel. According to the impact crusher for the ore mining, the conveyor belt is mounted for protecting a crusher body; and the problem that a conveyor belt of a traditional crusher is easily damaged by ore can be solved.

The invention discloses a volute tongue. The volute tongue is characterized by comprising a supporting frame and a flexible volute tongue wall forming the outer contour of the volute tongue; the supporting frame comprises an upper supporting body, a lower supporting body and a variable-R column body, the upper supporting body and the lower supporting body are arranged at the root of the volute tongue, and the variable-R column body is arranged at the head of the volute tongue; the upper supporting body, the lower supporting body and the variable-R column body are distributed in a triangle shape; the volute tongue further comprises a driving mechanism used for driving the variable-R column body to rotate. The invention further discloses a centrifugal fan comprising the volute tongue. The volute tongue has the advantages that the flexible volute tongue wall of the volute tongue is supported on the upper supporting body, the lower supporting body and the variable-R column body distributedin the triangle shape; the upper supporting body and the lower supporting body are arranged at the root of the volute tongue; the variable-R column body is arranged at the head of the volute tongue;the driving mechanism drives the variable-R column body to rotate and can achieve variable-R adjustment of the volute tongue so as to change the gap between the volute tongue and an impeller; accordingly, the performance of the draught fan is improved or noise is reduced, and the volute tongue can better adapt to various actual working conditions.

An additional mould-locking apparatus for indirect extrusion casting features that an additional mould-locking pull rod is used between upper and lower mould seats, its one end is fixed to lower mould seat, its another end has a mould-locking gap regulating block, and a hydraulic cylinder is fixed to a connecting plate for upper mould and its seat for driving the mould-locking block in order to lock or unlock mould.

The invention relates to a metal sheet roller straightening machine and belongs to the field of metallurgical machinery. The metal sheet roller straightening machine comprises a feeding plate, an upper straightening device, a lower straightening device, a main fixing frame, a machine frame, a motor and a belt. The upper straightening device comprises an upper feeding roller, a feeding roller bearing seat, an upper straightening roller set, upper straightening roller bearing seats, an upper discharging roller, an upper discharging roller bearing seat, an upper support, a pressing plate, a bolt and an adjusting spring. The lower straightening device comprises a lower feeding roller, a lower straightening roller set, a lower discharging roller, a lower main bearing seat, a V-shaped belt wheel and a transmission set gear. The spring is adopted by the upper straightening device for providing straightening force for straightening rollers, and thus noise generated in the straightening process of the straightening machine is greatly lowered; and meanwhile, bearings of the upper straightening device adopt guiding groove structures, the height of the straightening rollers can be adjusted conveniently so that the straightening machine can adapt to straightening of metal sheets with different thicknesses, production demands are met, dismounting and mounting are easy, and maintaining is convenient. The lower straightening device mainly provides force for moving of the metal sheets and does not provide straightening force proactively.

The invention provides a novel winding machine winding method and device thereof, and relates to the technical field of winding machines. The novel winding machine winding device comprises a base, a vertical plate is welded to one side of the top of the base, a top seat is vertically welded to the top of the vertical plate, a servo motor is embedded in one side of the interior of the base, a driving end of the servo motor penetrates through the top of the base to be fixedly connected with a rotating disc, the side, close to the vertical plate, of the interior of the base is fixedly connected with a first air cylinder, the piston end of the first air cylinder is fixedly connected with a bottom plate through the base, a top plate is arranged above the bottom plate, and a winding roller is arranged between one side of the top of the bottom plate and the top plate. By means of the arranged moving mechanism, a second tensioning roller can be driven to move, so that the distance between a first tensioning roller and the second tensioning roller is changed, so that the tensioning degree of a winding film is changed, and the object is wound more tightly.

The invention discloses a novel active air foil bearing based on PZT and SMA. The novel active air foil bearing comprises a shaft sleeve, piezoelectric ceramics (PZT), a memory alloy wire mesh block (SMA block), flexible hinges, a rigid push rod, pre-pressure applying devices, a cooling pipe, a wave foil and a top foil; the PZT and the SMA block are installed in pre-machined through grooves, the corresponding pre-pressure applying devices are designed for the PZT and SMA block, the wave foil is formed by pressing an elastic material, one end of the wave foil is welded, and the other end of thewave foil is free. The top foil overlies the wave foil. Power supply signals of the PZT are controlled, the flexible hinges are coupled, PZT deformation is amplified, the wave foil is supported by the rigid push rod, the wedge-shaped space is enlarged, therefore, the crossed coupling effect is weakened, the dynamic pressure effect of the bearing is enhanced, and the rigidity characteristic of thebearing is improved; by controlling the temperature of the SMA block, the SMA block expands and contracts to generate larger structural damping, and the damping characteristic of the bearing is improved; and finally, the rigidity and damping characteristics of the bearing are actively controlled, and the stability of the system is improved.

The invention discloses a belt breakage protection device with a speed reducing function. The belt breakage protection device comprises a machine frame and a capturing mechanism. The capturing mechanism comprises an upper conveying belt capturing portion and a lower conveying belt capturing portion. The upper conveying belt capturing portion comprises a movable upper capturing part which can swing upwards under the effect of gravity and a fixed upper capturing part installed on the upper portion of the machine frame, the movable upper capturing part swings towards and moves close to the fixed upper capturing part located above the movable upper capturing part and is matched with the fixed upper capturing part to form an upper clamping gap which can be used for capturing an upper conveying belt, the fixed upper capturing part serves as an upper capturing cross beam, the upper capturing cross beam comprises a regulator used for buffering and speed reducing, and the regulator comprises a static beam, a movable beam which is located below the static beam and can move upwards under the effect of the movable upper capturing part and a damping structure arranged between the static beam and the movable beam. Through the arrangement of the regulator, a speed reducing effect can be realized for capturing of the conveying belt, impact damage to the machine frame in the capturing process is reduced, and therefore the service life of the machine frame is prolonged.

A magnesium metal thin plate manufacturing method includes at least a casting process of supplying a molten metal obtained by melting a magnesium metal to a molten metal bath, drawing out the molten metal, supplying the molten metal into the gap between a pair of casting rolls composed of at least a pair of casting upper roll and casting lower roll, applying pressure to the molten metal, and casting a plate solidified at a predetermined temperature and having a predetermined thickness, and a rolling process of rolling the cast plate by means of at least a pair of rolling rolls by applying pressure thereto to manufacture a magnesium metal thin plate. With the above arrangement, there can be provided a magnesium metal thin plate manufacturing method and manufacturing apparatus that can effectively manufacture a magnesium metal thin plate by plastic working without requiring a heat energy generation step again in rolling.

The invention discloses a novel active air foil bearing. The bearing comprises a shaft sleeve, the PZTs, the flexible hinges, rigid push rods, precompression exertion devices, wave foil and top foil; the shaft sleeve is machined through wire cutting, three PZT mounting through grooves circumferentially and evenly distributed, the corresponding flexible hinges and the corresponding rigid push rods are obtained, the top ends of the rigid push rods are flush with the inner cylindrical face of the shaft sleeve, the PZTs are mounted in the through grooves, the corresponding precompression exertion devices are designed for the PZTs, the wave foil is formed by pressing of elastic materials, and is arranged on the shaft sleeve and the inner cylindrical faces of the rigid push rods, one end of the wave foil is welded to the inner round face of the shaft sleeve, and the other end of the wave foil is free. The top foil is arranged on the wave foil in a covering manner. Through control over power supply signals of the PZTs, the PZTs mechanically deform, the flexible hinges are enlarged to deform, and are supported through the rigid push rods to be attached to the wave foil on the push rods and the inner wall of the shaft sleeve, a gap between a bearing and a supporting rotor is changed, the wedge space is increased, the crossed coupling effect is weakened, the bearing dynamic pressure effect is enhanced, the rigid characteristic of the bearing is improved, and finally the aims of actively controlling the rigidity characteristics of the bearing and improving the stability of the bearing are achieved.

The invention discloses an intelligent support sliding bearing device with adjustable clearance and a clearance adjustment method. The intelligent support sliding bearing device comprises a support sliding bearing, an inclined block is arranged under the support sliding bearing, a guide rail is arranged under the inclined block, the bottom surface of the inclined block is matched with the guide rail in a sliding mode, the inclined block moves in the axial direction of the guide rail, the top surface of the inclined block is an inclined plane with a taper of 1 to 125, a pushing mechanism is arranged at one end of the inclined block, the other end of the inclined block is connected with a reset spring, and a vertical displacement sensor and a horizontal displacement sensor are respectively used for detecting the vertical radial displacement and the horizontal radial displacement of a rotor; the vertical displacement sensor and the horizontal displacement sensor are connected with the input end of a monitoring controller, and the output end of the controller is further connected with the control signal input end of a servo motor; when the rotor vibration is too large, signals collected by the sensors are sent to the controller, the controller controls the servo motor to make a certain action, and the clearance between the bearing and the shaft neck is changed, so that the elliptical bearing play a role, the rotor amplitude is reduced, and the whole system has a good effect of vibration reduction and suppression.

The invention discloses a hydrodynamic journal bearing which comprises a main shaft, a shaft sleeve, a bearing outer shell and two sealing end covers. A plurality of oil cavities are evenly distributed in the inner wall of the shaft sleeve, the main shaft is arranged in the middle of the shaft sleeve in a penetrating mode, the bearing outer shell is arranged on the outer side of the shaft sleeve in a sleeving mode, a working cavity is formed between the bearing outer shell and the shaft sleeve, a driving disc is arranged in the working cavity, a plurality of driving blocks are arranged on one side of the driving disc in a sliding mode, and an adjusting plate is arranged at the end, penetrating through a preformed hole in the shaft sleeve, of each driving block. According to the hydrodynamic journal bearing provided by the invention, the pressure of compressed air injected into air holes is adjusted. The driving disc can be controlled to reciprocate in the horizontal direction, so that all the driving blocks are driven to synchronously contract inwards or expand outwards in the direction perpendicular to the main shaft, the adjusting plate is driven to reciprocate, a gap between each oil cavity and the main shaft is changed, the thickness of an oil film is adjusted, the machining requirements of different products are met, the machining precision is improved, and the service life is prolonged.

The invention relates to an adjustable type spraying device which comprises a body, a rotating body, a spray conversion body and a water outlet body. The body is provided with a water inlet end and a water outlet end which communicates with the water inlet end. The rotating body is arranged on the top of the water outlet end, and the rotating body can generate repeated axial displacement with the water outlet end of the body. The spray conversion body and the water outlet body which cannot rotate relative to the rotating body are sequentially arranged on the top of the opening end of the rotating body from interior to exterior in a clearance manner. Multiple flow passing holes are formed in the spray conversion body, and the end face of the side, facing the water outlet body, of the spray conversion body is provided with multiple protruding water baffles. The water baffles can exactly penetrate in a water outlet in the water outlet body. According to the spraying device, the rotating body is driven to rotate so that the axial displacement of the rotating body is changed, meanwhile, the axial displacement of the spray conversion body is driven, finally, the flow passing area of the water outlet in the water outlet body is changed, the spraying angle between water flow and the water baffles is changed, and flow control and spraying area adjustment are achieved.

The invention provides an electromagnet test bench and a detection platform. After an electromagnet is fixed on a carrying platform of the electromagnet test bench, a hydraulic cylinder in the electromagnet test bench can move up and down to drive a guide plate to move vertically so as to change the gap between the electromagnet and the guide plate, so that the static characteristics of the electromagnet are tested. Compared with the related technology not being capable of detecting the own static characteristics of the electromagnet effectively, the electromagnet test bench is able to detectthe static characteristic of the electromagnet to realize test process automation. The electromagnet test bench has characteristics of great convenient in testing, high test accuracy, and comprehensive test items.

An electric water pump is disclosed having a motor with an axially moveable rotor unit. A rotary pump member is fixed for axial movement with the rotor unit to vary its position within a pump chamber so as to vary the flow rate through the pump chamber.

The invention discloses a belt-broken protective device with a deceleration function. The belt-broken protective device comprises a rack and a capturing mechanism. The capturing mechanism comprises an upper conveyor belt capturing part and a lower conveyor belt capturing part. The upper conveyor belt capturing part comprises a movable upper capturing branch part which can swing upwards under the action of the gravity and a static upper capturing branch part arranged on the upper portion of the rack. The movable upper capturing branch part swings towards and near the static upper capturing branch part which is located above the movable upper capturing branch part, and an upper portion clamping gap is formed by the match of the movable upper capturing branch part and the static upper capturing branch part and is capable of capturing an upper conveyor belt. The static upper capturing branch part is an upper portion capturing beam, and the upper portion capturing beam comprises a regulator for buffering and decelerating. The regulator comprises a static beam, a movable beam and a damping structure, wherein the movable beam locates below the static beam and is capable of moving upwards under the action of the upper capturing movable branch part, and the damping structure is used for supplying resistance for the upward movement of the movable beam. The regulator is arranged to supply a deceleration effect on capturing a conveyor belt, so that the impact and damage on the rack during a capturing process are reduced, and the service life of the rack is prolonged.