31results about How to "Solve brake problems" patented technology

The invention discloses a slipping slot type cross transfer device for assisting hoisting of a large-size box girder, which comprises two parallel cross transfer tracks, two supporting devices, two slipping slot type cross transfer girders, two pushing type lifting jacks and a lifting jack pump station, wherein the two slipping slot type cross transfer girders are respectively assembled on the two cross transfer tracks, the slipping slot type cross transfer girders and the cross transfer tracks are matched by slide slots / guide rails, and the matched positions are provided with pin holes at equal intervals and fixed by pin shafts; the two supporting devices are spanned on the two cross transfer girders and positioned on both sides of the two slipping slot type cross transfer girders; the two lifting jacks are connected with the other side of one of the supporting devices; each supporting device comprises a slipping base spanned on the two cross transfer tracks, longitudinal supporting girders are fixedly arranged on the slipping bases and arranged in parallel; and the top of the slipping slot type cross transfer device is provided with a fixed structure for stopping the movement of a transportation truck. The slipping slot type cross transfer device solves the cross transfer problem of large-size prefabricated box girders, and reduces the construction cost of girder installation engineering by about 5%-10%.

A running driver mechanism for the caterpillar belt type robot able to autonomously turn over is composed of main body and symmetrical left and right caterpillar belt units which consists of active wheel with brush-less motor having external rotor in it, driven wheel, caterpillar belt, and wobble wheel coaxial with said brush-less motor and with tension roller, supporting block, wobble arm, supporting arm and drive wheel.

The invention discloses a full-automatic multi-level linkage binding machine and a control method thereof. The technical problems that working procedures of an existing binding machine are linked up incoherently and the working efficiency is low due to semi-automation are solved. The following technical scheme is adopted: a linkage telescopic shifting type electroconductive rubber component, a linkage type cutting mechanism, a linkage telescopic type riveting mechanism and the working position switching of a linkage type working position switching mechanism are all controlled by lifting of an upper pressing mechanism in the vertical direction; a lower pressing mechanism controls a linkage type lower pressing braking and releasing mechanism through a pressing and driving mechanism so as to separate from or reunite with a workbench. The key to the invention is as follows: a plurality of linkage mechanisms are arranged in the binding machine, besides, orderly work is achieved through a control circuit with management software; and the device space is greatly reduced, and the working efficiency is improved.

The invention relates to the field of transmission control, in particular to an AMT intermediate shaft brake pneumatic control method based on a dual PWM valve. The method comprises the following steps of determining intermediate shaft reduction speed difference control target value; determining intermediate shaft reduction speed rate control target value; determining intermediate shaft reductionspeed rate control tolerance value; determining action time value for preliminarily building brake capacity; starting a brake command, and executing a preliminary brake capacity building stage; executing an intermediate shaft brake capacity fine adjustment stage, and carrying out intermediate shaft brake capacity fine adjustment; decontrolling the intermediate shaft brake capacity; judging whetherthe current intermediate shaft rotating speed is not higher than the intermediate shaft rotating speed control target value or not, and if not, finishing the intermediate shaft brake control process,and finishing intermediate shaft brake; and if the current intermediate shaft rotating speed is higher than the intermediate shaft rotating speed control target value, executing the intermediate shaft reduction speed micro control stage until the intermediate shaft brake is finished. The problems of over brake and in-advance decontrolling in the prior art can be solved.

The invention discloses braking equipment for a generator, which comprises a controller and a braking system, wherein the controller is used for monitoring the working state of a power converter for transforming the original electrical energy output by the generator into the electrical energy meeting the quality requirements of power transmission and distribution for an electrical network. The braking equipment for the generator is characterized in that when the power converter normally works, the braking system is controlled by the controller to cut off a braking resistor; and when the power converter is abnormal, the braking system is controlled by the controller to switch in the braking resistor and disconnect the power converter and the generator.

The invention belongs to the technical field of mechanical engineering and discloses an installing technology of a brake pulley of a double tilting angle compensation coupling; the invention essentially comprises the coupling and the brake pulley, the brake pulley is installed on a hub which is arranged on a half coupling at one side of two couplings with double tilting angle compensation function. When the brake pulley brakes, the technology can ensure that the radial compensation function of the coupling is not restricted. The technology has reasonable mechanism principle and simple processing, can greatly improve the stressing state of the equipment coupled, the coupling and a brake, prolong the service life of equipment and improve the reliability as well, thus the new installing technology of the brake pulley on the coupling has high popularization value.

The invention provides a braking device for a permanent-magnet direct-driving roller. The braking device for the permanent-magnet direct-driving roller comprises large gears fixedly installed on the roller and small gears meshing with the large gears, a rotation shaft is fixedly connected to the small gears, and brakes are arranged on the rotation shaft. The roller is driven by a belt to achieve transmission to drive the small gears to rotate, low-speed transmission is changed into high-speed transmission, the brakes and backstops are installed on the high-speed shaft, and the braking problemof the permanent-magnet direct-driving roller is effectively solved.

The invention discloses a mining underground anti-tilt thermal insulation dining car which is used for solving the problems that the existing dining car does not have the anti-tilt function, thereby being not applicable to mine shaft transportation and being easy to cause the spill of foods. The mining underground anti-tilt thermal insulation dining car comprises a car body and wheels, wherein a thermal insulation chamber and a chamber cover are arranged in the car body, the thermal insulation chamber consists of an outer chamber and an inner chamber which have the same radian along the travelling direction of the car body, and the outer chamber is fixedly connected with the car body; two inner chamber door shafts are arranged in the middle positions of the top of the inner chamber, the inner chamber door shafts have elasticity, two ends of each inner chamber door shaft are fixed on the car body and can rotate, and the inner chamber is suspended on the inner chamber door shafts; and a certain gap is arranged between the inner chamber and the outer chamber, a brake shoe is arranged on the outer side of the inner chamber, and a fixing bolt and a fixing screw cap are arranged in the positions which correspond to the brake shoe at the bottom of the outer chamber. The mining underground anti-tilt thermal insulation dining car can effectively solve the tilt problem of the transportation of the dining car in a mine tunnel, play the roles of anti-tilt and brake, greatly facilitate the underground food transportation and have great market potential.

The invention discloses an emergency braking system for a harvester. The emergency braking system for the harvester comprises a hydraulic pump. The hydraulic pump is connected with an oil supplementing pump, and an inclined disc of the hydraulic pump is connected with a hydraulic pump servo cylinder. The oil supplementing pump is connected with an oil inlet of a hydraulic pump servo proportion valve through an oil path. An oil tank is connected with an oil outlet of the hydraulic pump servo proportion valve through an oil path. A first cavity of the hydraulic cylinder servo cylinder is connected with a first work oil port of the hydraulic pump servo proportion valve through a third oil path, and a second cavity of the hydraulic cylinder servo cylinder is connected with a second work oil port of the hydraulic pump servo proportion valve through a fourth oil path. The emergency braking system further comprises a two-position two-way electromagnetic valve, a work oil port of the two-position two-way electromagnetic valve is connected with the first cavity of the hydraulic pump servo cylinder through a first oil path, a work oil port on the opposite side of the two-position two-way electromagnetic valve is connected with the second cavity of the hydraulic pump servo cylinder through a second oil path, and the two-position two-way electromagnetic valve is electrically connected with an electric control system. The emergency braking system guarantees that the harvester can still be reliably braked and automatically controlled when the harvester has a circuit fault, so that the operation safety of the harvester is improved.

The invention provides a photoelectricity and CT (Computed Tomography) mixed differential protection system and method for an isolation transformer. The system comprises a primary-side unit, the isolation transformer, a secondary-side unit, a secondary protection system, a system incoming line, a system outgoing line and a circuit breaker, wherein the system incoming line and the system outgoing line are respectively connected to a primary side and a secondary side of the isolation transformer through the primary-side unit and the secondary-side unit; the primary-side unit and the secondary-side unit are respectively connected with the secondary protection system; the circuit breaker is positioned between the system incoming line and the primary-side unit. According to the photoelectricity and CT mixed differential protection system and the method for the isolation transformer, provided by the invention, the system is compact in structure, high in anti-jamming capability and high in reliability; differential protection is braked by accurately judging excitation surge current of the transformer; the application range covers all differential protection systems of the transformer.

The invention discloses an elevator counterweight frame to solve the problem about brake of the elevator counterweight frame in the radiating and emergency situations. The elevator counterweight framecomprises a frame body and a counterweight block; the frame body is provided with a guide shoe, a braking component and a guide rail; the braking component comprises a semiconductor chilling plate, aheat absorbing sheet and a phase change layer connected with the semiconductor chilling plate and the heat absorbing sheet; the braking component is arranged on the side, close to the guide rail, ofthe guide shoe; the heat absorbing sheet is arranged on the side, close to the guide rail, of the braking component; one end of the semiconductor chilling plate is arranged in the phase change layer;and the other end of the semiconductor chilling plate is electrically connected with a control circuit. Through the specially made braking component, the elevator counterweight frame realizes the radiating effect while realizing braking to improve the elevator safety.

The invention discloses a mining underground anti-tilt thermal insulation dining car which is used for solving the problems that the existing dining car does not have the anti-tilt function, thereby being not applicable to mine shaft transportation and being easy to cause the spill of foods. The mining underground anti-tilt thermal insulation dining car comprises a car body and wheels, wherein a thermal insulation chamber and a chamber cover are arranged in the car body, the thermal insulation chamber consists of an outer chamber and an inner chamber which have the same radian along the travelling direction of the car body, and the outer chamber is fixedly connected with the car body; two inner chamber door shafts are arranged in the middle positions of the top of the inner chamber, the inner chamber door shafts have elasticity, two ends of each inner chamber door shaft are fixed on the car body and can rotate, and the inner chamber is suspended on the inner chamber door shafts; and acertain gap is arranged between the inner chamber and the outer chamber, a brake shoe is arranged on the outer side of the inner chamber, and a fixing bolt and a fixing screw cap are arranged in the positions which correspond to the brake shoe at the bottom of the outer chamber. The mining underground anti-tilt thermal insulation dining car can effectively solve the tilt problem of the transportation of the dining car in a mine tunnel, play the roles of anti-tilt and brake, greatly facilitate the underground food transportation and have great market potential.

The invention relates to a brake device capable of safety protection in the technical field of engineering machinery, in particular to an anti-slip safe brake applied to an operating mechanism of a window cleaning machine. The anti-slip safe brake comprises a power-driven push rod, a bearing shaft, a locating baffle sleeve, a bearing wheel, a locating jack screw, an eccentric wheel, a thrust spring, a horizontal guide wheel, a frame body, a friction brake block and disk springs, wherein the power-driven push rod is fixed on the frame body; a power-driven push rod head props against the bearing shaft; the locating baffle sleeve is sleeved on the bearing shaft; the bearing wheel is connected to the locating baffle sleeve; the locating jack screw is fixed on the frame body; the head of the locating jack screw props against a gap of the eccentric wheel; the thrust spring is sleeved on the friction brake block; one end of the thrust spring jacks up the frame body and the other end of the thrust spring jacks up the eccentric wheel; the horizontal guide wheel is fixed on the friction brake block; the friction brake block is connected to the frame body; and the disk springs are connected in grooves at the two ends of the frame body and are fixed by eyelet bolts. The anti-slip safe brake has reliable self-locking performance and high sensitivity and can be used for effectively solving the problem of braking of the window cleaning machine during running.

The invention relates to the field of transmission control, in particular to an AMT intermediate shaft brake pneumatic control method based on a double PWM valve, which comprises the steps of: determining an intermediate shaft deceleration speed difference control target value; determining an intermediate shaft deceleration rate control target value; Determine the control tolerance value of the deceleration rate of the intermediate shaft; determine the action time value for the initial establishment of the braking capacity; start the braking command, enter the preliminary braking capacity establishment stage; enter the intermediate shaft braking capacity fine-tuning stage, carry out the intermediate shaft braking capacity Fine-tuning; the braking capacity of the intermediate shaft is released from control; it is judged whether the current intermediate shaft speed is not higher than the target value of the intermediate shaft speed control, if not higher, the intermediate shaft braking control process is over, and the intermediate shaft braking is completed; When the shaft speed is higher than the control target value of the intermediate shaft speed, the intermediate shaft deceleration micro-control stage is performed until the intermediate shaft braking is completed. The invention can overcome the problems of over-braking and early-release braking in the prior art.

The invention relates to the field of engineering machinery, in particular to a composite braking system. The composite braking system comprises a seat, wherein the seat is fixedly connected with a gearbox main body; an end of a transmission shaft extends out of a shell of the gearbox main body and is fixedly connected with an output flange; the transmission shaft is connected with the outer end of the output flange in a fastened manner through a connecting bolt; the inner end of the output flange is in sleeve connection to the outer side wall of the transmission shaft; a main cavity is formedbetween the shell of the gearbox main body and the transmission shaft; the transmission shaft in the main cavity is fixedly connected with a bidirectional piston; an oil cylinder body of which the rear section inner side wall is matched with the outer side wall of the bidirectional piston is arranged in the main cavity and positioned on the outer side of the bidirectional piston; the inner end ofthe oil cylinder body is fixedly connected with the gearbox main body; and a buffering auxiliary device is arranged between the seat and the bidirectional piston. The composite braking system is reasonable in structural design; on the basis of reduction of the manufacturing cost, vehicle emergency braking, parking braking, running braking and micro-motion functions are fulfilled; and when the composite braking system is used, the safety factor is high.

The invention discloses a wheeled hydraulic well drilling machine used in the petroleum and natural gas industry, which is suitable for operations such as salvaging oil, water and gas wells, inspecting pumps and testing oil. The invention includes an engine, a cab, an operating room, a hydraulic oil tank and an operating system, a traveling part and an operating part, the traveling part has a chassis, a front drive axle and a rear drive axle; the working part has a crown block, a derrick and a hydraulic lifting control system, The derrick is lifted by a hydraulic control cylinder. The hydraulic transmission system transmits the power of the engine to the gearbox, and the gearbox transmits the power to the walking part and the working power transmission mechanism respectively. The hydraulic transmission system has a hydraulic pump, a main valve block and a hydraulic motor. The engine drives the hydraulic pump to transmit high-pressure oil to the hydraulic motor through the main valve block, and the hydraulic motor is connected to the gearbox. The transmission structure is simplified, and the gear box has fewer gears and is easy to manufacture. Using hydrostatic drive technology and its own mast type derrick, it shortens the preparation time for operation.

The present invention provides a net-casting large-scale ship model brake device. The device comprises a deceleration net, a cable, a hoist and an emitter. The net-casting large-scale ship model brakedevice is inspired by a brake umbrella employed when an airplane is landing, and is a simple and practical hydrodynamic guidance device. The emitter is arranged at the middle portion and installed ona ship model tail deck, the deceleration net is casted into water at a certain angle, and netting is filled with sea water to generate resistance to allow the ship model to be decelerated and braked;and the hoist returns the deceleration net after the ship model stops motion, and the emitter is reinstalled into the ship model for usage for the next time. The net-casting large-scale ship model brake device is simple in structure, convenient to operate and high in performance cost ratio, and effectively solves the brake problem of a large-scale ship model self-propulsion test under an actual sea condition.

The invention belongs to the spacecraft structure dynamic test technical field and relates to a spacecraft explosion separation guiding type safety recovery test device. The spacecraft explosion separation guiding type safety recovery test device is characterized in that the spacecraft explosion separation guiding type safety recovery test device comprises an aircraft main bundling device connecting section and main bundling devices; the upper part of the aircraft main bundling device connecting section is connected with a boundary simulation device through a cabin section change-over connection tool; one end of each main bundling device is in bundling connection with a spacecraft, and the other end of the corresponding main bundling device is connected with the upper part of a guiding type recovery device; the lower part of the guiding type recovery device is fixed onto the ground through hinges; a sensor is installed in the aircraft main bundling device connecting section; the sensor is connected with a test system; buffering recovery pads are laid on the ground; and after a test is started, the main bundling devices are unlocked and separated, and the separated main bundling devices and the guiding type recovery device rotate along the hinges.

A method for brkaing ship by rudder features that the rudder installed at stern is controlled to make it perpendicular to water stream, so generating huge braking resistance to quickly decelerate it.

The invention relates to the technical field of coal mine fully-mechanized coal mining conveyor driving systems, in particular to a full-automatic chain tightening permanent magnet driving system which comprises a permanent magnet semi-direct-drive motor and a full-automatic chain tightening system. The full-automatic chain tightening system comprises a motor chain tightening speed reducer, an electro-hydraulic control system, a connecting cover and an output gear. The full-automatic chain tightening system is arranged on the tail portion of the permanent magnet semi-direct-drive motor and occupies a small space, meshing and disengaging of the idle wheel of the motor chain tightening speed reducer and the output gear on the tail portion of the motor can be automatically achieved by operating the electro-hydraulic control system, a conveyor chain is automatically tightened after meshing, and braking is conducted after tightening reaches a program set value. According to the full-automatic chain tightening permanent magnet driving system of the invention, the problem that a permanent magnet drive conveyor cannot tighten a chain and brake at present is solved, so that a permanent magnet semi-direct drive system can be reliably applied to the conveyor.

The invention discloses a slipping slot type cross transfer device for assisting hoisting of a large-size box girder, which comprises two parallel cross transfer tracks, two supporting devices, two slipping slot type cross transfer girders, two pushing type lifting jacks and a lifting jack pump station, wherein the two slipping slot type cross transfer girders are respectively assembled on the two cross transfer tracks, the slipping slot type cross transfer girders and the cross transfer tracks are matched by slide slots / guide rails, and the matched positions are provided with pin holes at equal intervals and fixed by pin shafts; the two supporting devices are spanned on the two cross transfer girders and positioned on both sides of the two slipping slot type cross transfer girders; the two lifting jacks are connected with the other side of one of the supporting devices; each supporting device comprises a slipping base spanned on the two cross transfer tracks, longitudinal supporting girders are fixedly arranged on the slipping bases and arranged in parallel; and the top of the slipping slot type cross transfer device is provided with a fixed structure for stopping the movement of a transportation truck. The slipping slot type cross transfer device solves the cross transfer problem of large-size prefabricated box girders, and reduces the construction cost of girder installation engineering by about 5%-10%.

The invention discloses a braking device and method of a mechanically driven road roller. An air pocket is manipulated by a braking pedal to convey air to an air booster pump; when a piston of the airbooster pump is under the air pressure, braking fluid is pushed into a brake for braking; an air booster pump input pressure signal collected by an air pressure sensor is transmitted to an ECU controller; and the ECU controller controls an engine to lower the output torque according to the pressure signal transmitted by the air pressure sensor, thus the braking torque of the brake is larger thanthe output torque of the engine, and the engine is subjected to flameout braking. The braking problem of the mechanically driven road roller can be solved, during braking, a driver only needs to treadthe braking pedal and does not need to tread a clutch pedal simultaneously, then quick braking can be achieved, and the braking time and the braking distance are shortened.

The invention provides a momentum and energy absorption device shared by rubber and daub. The device comprises an actuating device, a guide device and a buffer device, wherein the actuating device impacts the buffer device through the guide device, the buffer device is internally provided with daub, the buffer device absorbs kinetic energy of the actuating device through the daub, and the actuating device absorbs the kinetic energy through the daub for braking; and through holes are formed in the side wall of the buffer device, and the daub absorbs the kinetic energy and then is discharged through the through holes. For the device, the braking problem of the actuating device in an ejection test is effectively solved through the buffering and guiding design of the daub -rubber pad, and during the period, all parts are not damaged by rubbing, and can be quickly reset and reused.

The invention discloses a large vertical axis wind power system. A turbine is an ultra-large unit with the power being 10 MW stage or above, a main blade is formed by compositing a two-blade dual-arm Darrieus blade body, a Savonius blade body, air balls and the like of a supporting blade, the air balls solve the problem in aerodynamics brake, a permanent magnet direct drive is adopted in an electric generator, a magnetic suspension spring structure without an extra magnet is adopted in the whole shaft system, and the large vertical axis wind power system is a wind turbine generator set which is highest in structural strength, highest in power generation efficiency, best in safety and widest in industrial coverage in the world at present.

The invention discloses the ultra-large type vertical axis wind turbine electromechanical technology. A turbine is an ultra-large type unit of the 10MW level or more. From the perspective of structural mechanics, two-blade single arm Aerogenerator X design of the Arup company in the England is improved to double-triangle connecting design of two-blade double arms. The system has the strongest structural stiffness and strength in large type machines all the world, so that the unit output power is improved; meanwhile the aerodynamic braking problem is solved, and a direct drive type electric generator of an open type new structure is obtained, so that the wind turbine electromechanical system becomes a wind turbine generator set integrated with the latest technology at home and abroad, the largest output power and the highest industrialization implementation degree.

The invention provides a photoelectric CT mixed isolation transformer differential protection system and method. The system includes a primary side unit, an isolation transformer, a secondary side unit, a secondary protection system, a system incoming line, a system outgoing line, and a circuit breaker; the system incoming line and the system outgoing line are respectively connected to the primary side and secondary side of the isolation transformer through the primary side unit and the secondary side unit. Both the primary side unit and the secondary side unit are connected to the secondary protection system, and the circuit breaker is located at the and primary side unit. The invention provides a photoelectric CT hybrid isolation transformer differential protection system and method. The system has compact structure, strong anti-interference ability, and high reliability. It can accurately judge the excitation inrush current of the transformer to brake the differential protection, and the application range covers All transformer differential protection systems.