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

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 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 invention discloses a braking control method, a control system and a vehicle for an unmanned vehicle. The braking control method comprises the following steps: acquiring vehicle condition and road condition information of the vehicle; acquiring a brake pressure distribution model; The pressure distribution model determines the first brake pressure and the second brake pressure; drives the front axle brake device to brake the front wheels according to the first brake pressure, and drives the rear axle brake device to brake the front wheels according to the second brake pressure Rear wheel brake control. The brake control method provided by the embodiment of the present invention can customize the brake pressure distribution of the front axle and the rear axle according to the vehicle condition and road condition information, which solves the problem of unreasonable brake pressure configuration and avoids brake nodding and In the event of a rollover accident, it ensures a stable braking posture of the vehicle body, which helps to prolong the service life of the vehicle's braking device. In addition, it can solve the braking problem under some extreme working conditions, which is conducive to improving braking reliability and driving safety.

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 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 relates to an electro-hydraulic braking system, which includes a brake pedal and a first brake master cylinder connected with the brake pedal, and is characterized in that it also includes a motor, a push rod, a second brake master cylinder, and an ECU control unit , the motor is connected to the second brake master cylinder through the control push rod, and the ECU control unit receives the brake signal from the brake pedal to control the motor to act. The invention uses a linear motor to drive the piston movement of the brake master cylinder to achieve the purpose of braking, retains the traditional vacuum booster hydraulic brake system, cancels the vacuum booster, and changes the double cylinder brake master cylinder into a single cylinder, so that it is not affected. Serving the limitation of vacuum, it can be used in modern pure electric vehicles, requiring very little manpower, reducing manpower fatigue and improving driver safety.

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.

In order to solve the problem of heat dissipation of the counterweight frame and braking in emergency situations, the present invention designs an elevator counterweight frame, which includes a frame body and a counterweight block. The frame body is provided with guide shoes, brake parts and guide rails. sheet, heat absorbing sheet and the phase change layer connecting them, and the braking component is arranged on the side of the guide shoe close to the guide rail. The heat absorbing sheet is arranged on the side of the brake component close to the guide rail. One end of the semiconductor refrigerating sheet is arranged in the phase change layer, and the other end of the semiconductor refrigerating sheet is electrically connected with the control circuit. The invention realizes the braking while taking into account the heat dissipation effect through the special brake parts, and improves the safety of the elevator.