33results about How to "Eliminate stuck phenomenon" patented technology

The invention discloses a general satellite sun wing expanding frame automatically adjusting levelness. The general satellite sun wing expanding frame automatically adjusting levelness is composed of a mechanical system and a control system. The mechanical system mainly comprises two upper guide rails, two driving mechanisms, a main beam, a hinged telescopic mechanism and a rigid connection telescopic mechanism. The mechanical system of the sun wing expanding frame is fixed to opposite brackets arranged on the two sides of an infrastructure, and the two upper guide rails are welded to the brackets. The upper guide rails are connected with the main beam. The main beam is driven by the driving mechanisms to move on the upper guide rails, and then the whole system can move in the appointed area. According to the general satellite sun wing expanding frame automatically adjusting levelness, a contact gap and unnecessary constraint are eliminated, a lifting mechanism ascends and descends freely, the clamping phenomenon in the lifting process is eliminated, swinging of a platform is eliminated, the leveling effect and stability of the system are guaranteed, the position of the expanding frame is changed freely, and the expanding frame ascends and descends freely in the height direction, and the accurate and automatic adjustment of 0.04 mm/m of the levelness of the guide rails is achieved.

The invention relates to an inner-outer-pressure balanced waterproof car electric horn. The electric horn comprises a horn rear cover assembly, a coil assembly, a connector assembly and a contact plate assembly, wherein the horn rear cover assembly comprises a rear cover shell, an iron core, a pressure balance hole and a plugging hole, the pressure balance hole and the plugging hole are arranged on a soleplate of the rear cover shell, the coil assembly is sleeved on the iron core in the middle of the horn rear cover assembly, the connector assembly is installed on the soleplate of the horn rear cover assembly, the contact plate assembly is arranged above the coil assembly and fixed on the rear cover shell of the horn rear cover assembly, the inner side surface of the pressure balance hole is provided with a waterproof breathing film, so that not only can the balance of the pressure inside and outside the horn be solved, but also the waterproof problem of the horn can be solved, the damage of water on the internal circuit can be avoided, the service life of the entire horn is longer, and the reliability is higher.

The invention discloses a flexible linear motor double-drive gantry platform. The flexible linear motor double-drive gantry platform comprises a base, longitudinal linear motors are fixedly connectedto the left side and the right side of the top end of the base correspondingly, connecting plates are fixedly connected to the top ends of the two longitudinal linear motors, sliding grooves are formed in the top ends of the left sides of the connecting plates, supports are arranged on the top ends of the connecting plates, pulleys are arranged on the bottoms of the front ends of the supports, thepulleys are movably connected with the supports, the pulleys are clamped with sliding grooves in a sliding manner, straight cylinders are fixedly connected to the front end and the rear end of the inner portion of the right side of each support, and straight rods are inserted in the straight cylinders. According to the flexible linear motor double-drive gantry platform, the phenomenon that due tomachining and mounting, the large parallelism error between the longitudinal linear motors on the two sides is caused, and structure interior inner stress is caused is effectively removed, through changing of rotation of a transverse cross beam relative to the transverse direction, the platform can well adapt to desynchrony of the longitudinal linear motors, and the aim of removing clamping caused by desynchrony of driving of the longitudinal motors on the two sides can be achieved.

The invention discloses an orthogonal magnetic circuit radial-axial-integrated magnetic bearing based on a symmetrical self-lubricating flexible backup bearing structure. A radial magnetic bearing coil of the orthogonal magnetic circuit radial-axial-integrated magnetic bearing is mounted on a stator tooth set of a stator iron core; two radial rigid magnetic-conductive rings are mounted at an outerdisc of the stator iron core so as to prevent the short circuit problem of permanent magnetic circuits, wherein a certain gap exists between the two radial rigid magnetic-conductive rings; an axial magnetic bearing coil is located at a thrust disc of a rotor shaft and mounted in a cavity formed by the two magnetic-conductive rings; graphite rings and backup bearing skeletons which achieve the axial self-lubricating effect are arranged on the two sides of the thrust disc correspondingly; and a radial backup bearing skeleton and a graphite internal convex ring are arranged in an inner ring cavity of a radial flexible magnetic conductive ring for achieving the radial self-lubricating effect. By adopting the technical means that axial and radial electromagnetic circuits are combined into a whole, and a radial magnetic bearing and a backup bearing are combined into a whole, the technical problem that traditional magnetic bearings are low in coaxiality is solved.

The invention relates to a low-load type cut-off butterfly valve, in particular to a low-load cut-off butterfly valve which is developed for working conditions that the nominal pressure is low and cutting off is required, and belongs to the field of fluid control valves. A valve plate is mounted in a valve body; the valve body comprises sleeves provided with stuffing boxes, a stuffing component is arranged in each stuffing box, filler pressure plates are arranged on the outer side of the stuffing components, and the filler pressure plates are fixed at the end parts of a first sleeve and a second sleeve through screw rods and lock nuts; a first shaft hole and a second shaft hole are formed on the valve body, wherein the first shaft hole and the second shaft hole penetrate the first sleeve and the second sleeve respectively, a valve rod is arranged in the first shaft hole, and a driven shaft is arranged in the second shaft hole; a valve seat is arranged in the inner chamber of the valve body; the upper end and the lower end of the valve plate are in rotational connection with the valve rod and the driven shaft respectively; the valve seat is embedded in the inner chamber of the valve body to form a certain angle; the valve plate is an integral part with a triple eccentric structure; and when at open and middle positions, the valve seat is not in contact with the valve plate and dose not interfere with the valve plate.

The invention discloses an orthogonal magnetic circuit radial magnetic suspension bearing based on a symmetric self-lubricating flexible auxiliary bearing structure. A rotor shaft (6) of the magneticsuspension bearing is sleeved with a rotor core (7), and the rotor core (7) is located on a stator tooth set (8A) of a stator core (8). A coil is mounted on the stator tooth set (8A) of the stator core (8), and two radial rigid magnetic conducting rings are mounted on an outer disc of the stator core (8). A certain clearance exists between the two radial rigid magnetic conducting rings in the axial direction to prevent the short circuit of a permanent magnetic circuit. A graphite inward protruding ring cooperates with a radial auxiliary bearing framework, is arranged in an inner ring cavity ofa radial flexible magnetic conducting ring and is compressed by a radial bearing check ring, and the graphite inner ring is prevented from axially sliding. A permanent magnet is mounted between the radial rigid magnetic conducting rings and the radial flexible magnetic conducting ring. The magnetic suspension bearing is divided into two parts in bilateral symmetry around the stator core in the axial direction, the design method that a radial magnetic bearing and an auxiliary bearing are combined into a whole is adopted, and the technical problem that the coaxiality of a traditional magnetic bearing and auxiliary bearing is low is solved.

The invention provides a lens displacement adaptive device, which comprises a sliding shaft fixing base, a sliding bracket, a first sliding shaft, a second sliding shaft and a driving mechanism. The two opposite ends of the sliding shaft fixing base are provided with a first groove and a first groove respectively. Thus, when the sliding bracket slides in the X direction, by means of a gap betweenthe first groove and the first sliding shaft in the Z direction, and a gap between the second groove and the second sliding shaft in the Y direction, a purpose of adjusting the displacement in the three directions of X, Y, and Z is achieved, and the machining deviation and the assembly deviation between components are absorbed so that the sliding bracket slides smoothly on the sliding shaft and agood adjustment effect is achieved. The invention also provides a projection device including the lens displacement adaptive device.

The invention discloses a telescopic lead inserting device for an automatic molding machine for double-bang fireworks. The telescopic lead inserting device is characterized by comprising a lead inserting base, lead inserting tubes, a lead cutting board, a lead cutting form board, lead feeding wheels, a lead feeding guide wheel, a movable board and lead inserting stroke shafts, wherein the lead cutting board and the lead cutting form board are oppositely arranged at one end of the lead inserting base; the multiple lead inserting tubes are arranged on the lead cutting form board side by side respectively, the multiple lead feeding wheels correspond to the lead inserting tubes respectively and are arranged in the lead inserting base, the lead feeding guide wheel is arranged on one side of each lead feeding wheel, the lead inserting base is connected with the movable board, the movable board is arranged on the lead inserting stroke shafts in a sliding sleeve manner and is connected with a lead inserting stroke driving mechanism for driving, the lead cutting board is connected with a lead cutting driving mechanism for driving, the lead feeding wheels are connected with a lead feeding driving mechanism, the movable board moves the lead inserting base to a lead inserting station, and leads are conveyed to a barrel of the double-bang fireworks through the lead inserting tubes under the matching of the lead feeding guide wheel and the lead feeding wheels. The telescopic lead inserting device has the advantages of being high in lead inserting speed, high in production efficiency and unified in product specification, guaranteeing overall quality of products and the like.

The invention relates to the technical field of steam turbine valves, and discloses a valve jamming prevention assembly for fault maintenance of a steam turbine valve. The valve jamming prevention assembly comprises a jamming prevention plate, wherein a valve port is formed in the center of the inner side of the jamming prevention plate; a pneumatic wheel is fixedly connected to the outer side of the valve port; and a connecting block is movably connected to the outer side of the pneumatic wheel. According to the valve jamming prevention assembly for fault maintenance of the steam turbine valve, an elastic column is electrified to move through electric energy converted from kinetic energy of gas, the elastic column drives a movable folding rod to move, the movable folding rod drives a transverse toothed plate to transversely reciprocate at the top of a bevel gear, a negative pressure pushing bin drives descaling liquid in an inner liquid bin to be sucked into the negative pressure pushing bin, an inclined piston pushes the descaling liquid to be discharged into an atomization rod, the atomized descaling liquid is in contact with dirt in the valve through flowing of the gas, and then the dirt in the valve is eliminated, so that the jamming phenomenon of the valve is eliminated.

An antiseize fuel gas control valve for a waste mine gas use unit comprises a fuel gas control valve body, a bearing block hole, a valve rod and a bearing cap, wherein the bearing valve body is provided with a bearing block hole, and a bearing is mounted in the bearing block hole. The valve rod is nested in the bearing hole and is located on two sides of the valve body. A fuel gas valve plate and a clamping groove of an electrical contact of a contact motor outside the valve rod are fixed to be connected, and the opening and closing of the valve plate for 0-90 degrees is realized by a control system module. The bearing cap is mounted outside the bearing block, lubricating grease can be added, it is ensured that the valve rod rotates flexibly without seizing, corrosion and dust entering are prevented, regular maintenance is convenient, burning loss of an electrical control module and a motor is prevented, the service life is prolonged, and operation and maintenance costs are reduced.

The invention relates to the technical field of material crushing and discloses a steel bar crushing method and steel bar crushing equipment adopting the crushing method. The steel bar crushing equipment comprises a pair of rotating cutter shafts and a main shearing cutter seat, wherein the pair of the rotating cutter shafts are correspondingly arranged on two sides of the main shearing cutter seat. Cutter heads are arranged on the rotating cutter shafts, shearing cutter teeth are arranged on the cutter heads, a shearing groove penetrating up and down is formed in the main shearing cutter seat, and the two sides of the tooth width and the tooth top of each shearing cutter tooth are correspondingly matched with the two sides and the groove bottom of the shearing groove. A steel bar is thrown downward from the upper part of the main shearing cutter seat, so that the steel bar falls between the pair of rotating cutter shafts. The rotating cutter shafts rotate, the shearing cutter teeth onthe rotating cutter shafts hook the steel bar, and the steel bar is pressed down to the upper plane of the main shearing cutter seat. The rotating cutter shafts continue to rotate to press and shearthe steel bar located at the groove in the main shearing cutter seat. The steel bar crushing method and the steel bar crushing equipment realize the automation of steel bar crushing and further improve the efficiency and quality of steel bar crushing.

The invention discloses a self-positioning type pour plug. The self-positioning type pour plug comprises a pour plug plate, pour plug bodies and bolts. The pour plug plate is provided with a plurality of first holes, and the first ends of the bolts penetrate through the first holes and are connected with the pour plug bodies. The aperture of the first holes is 0.1-0.5 mm larger than the diameter of rod parts of the bolts. A movable clearance is reserved between each pour plug body and the pour plug plate. The pour plug bodies can be in clearance fit with material cups on molds. The self-positioning type pour plug can effectively prevent the phenomenon that the pour plug bodies get stuck, thereby being beneficial for improving production efficiency.

The present invention provides a pulverizer for pulverizing an object with a pulverizing blade, the pulverizer comprising: a drive motor for driving the forward and reverse rotation of the pulverizing blade; an inverter for controlling the rotational speed and rotational direction of the drive motor by changing frequency; and a control processor which is used for controlling the frequency converter. The control processor repeats the following overload relieving processing: in the process of enabling the driving motor to rotate forwards at the forward rotation frequency through the frequency converter, the control processor detects that the driving current value of the frequency converter is greater than a preset overload current value and continues for a preset time, and then the overload relieving processing is performed, the frequency converter stops the driving motor, after the driving motor stops for a preset time, the frequency converter enables the driving motor to rotate reversely for a certain time at a reverse rotation frequency and then stops the driving motor, and after the driving motor stops for a preset time, the frequency converter enables the driving motor to rotate forwards at a forward rotation frequency. By adopting the pulverizer, the pulverizing efficiency can be prevented from being influenced by repeated occurrence of a phenomenon that the object to be pulverized is clamped, and the service life of the driving motor can be prolonged.