104results about How to "Avoid overload damage" patented technology

The invention discloses a full-trailer braking system and a braking method thereof. The full-trailer braking system comprises a braking air supply pipeline, a traveling braking control pipeline, a parking braking control pipeline, an ABS system and a pipeline connecting all parts. The braking air supply pipeline is connected with a braking air supply pipeline of a tractor to provide pressure air for the full-trailer braking system. The traveling braking control pipeline is connected with a traveling braking control pipeline of the tractor to provide control pressure for traveling braking of a full-trailer. The parking braking control pipeline is connected with a parking braking control pipeline of the tractor to provide the control pressure for parking braking of the full-trailer. The full-trailer braking system can be directly operated by a driver in a cab; meanwhile, the full-trailer braking system has the ABS anti-lock function and has a self-adaptive ability to different suspension loads and braking force.

The invention discloses a wheel type conveying line which comprises a rack. Multiple rows of eccentric rotating wheels are arranged on the rack in an equal height manner. The axes of all the eccentricrotating wheels are parallel to one another and are parallel to the horizontal plane. Each eccentric rotating wheel is arranged on an installing frame located on the rack in the manner of rotating around the axis of the eccentric rotating wheel. The eccentric rotating wheels on each row are attached to a driving roller, the driving roller makes contact with the lower semicircle of each eccentricrotating wheel, the driving roller is affected by upward elastic force, and thus the eccentric rotating wheels are attached to the driving roller in a self-adapting manner, or the driving roller makescontact with the upper semicircle of each eccentric rotating wheel, the eccentric rotating wheels are affected by the upward elastic force, and the eccentric rotating wheels are attached to the driving roller in a self-adapting manner. The driving roller rotates under the driving of a first power source, and the eccentric rotating wheels are driven to rotate through friction force. According to the wheel type conveying line, the design of the scheme is elaborate, the eccentric rotating wheels or the driving roller are affected by the upward elastic force, thus the eccentric rotating wheels always keep being attached to the driving roller, after abrasion is caused or when the installing position precision is poor, self-adaptive adjusting is achieved, rotating between the eccentric rotatingwheels and the driving roller is effectively ensured, and the conveying stability is improved.

The invention discloses an overlapping quantity pneumatic measuring device and method of a large-flow electro-hydraulic servo valve. The overlapping quantity pneumatic measuring device is mainly composed of a valve seat pressing air cylinder, a differential pressure type flow meter, a tension pressure sensor, an electric translation table, a valve sleeve push-out air cylinder, a valve sleeve ejector rod, an air distribution seat, an auxiliary ejector rod, a sliding valve assembly, a guide seat, a valve seat pressing rotating air cylinder, a displacement sensor, a displacement sensor horizontalmoving air cylinder, a sliding block guide rail, a valve element clamping air cylinder and the like; According to the method, an overlapping quantity pneumatic comprehensive measuring method of a pressure type measuring gas path and a flow type measuring gas path is mainly adopted. The overlapping quantity pneumatic measuring device has the advantages that under the premise that the overlapping quantity measuring precision and repeated precision requirements of the large-flow electro-hydraulic servo valve are met, the overlapping quantity measurement of large-flow sliding valve pairs with various size specifications can be achieved, the measuring automation degree and the testing efficiency are greatly improved, and the skill requirements of operating workers are reduced.

The invention discloses a material rubbing and squeezing smashing mechanical device which comprises an upper device shell, a middle device shell and a lower device shell. A smashing motor is arranged on the upper portion of the upper device shell and matched with a rotating shaft. An ash damper is arranged in the upper device shell. The rotating shaft is matched with a connector through a telescopic rod which is sleeved with a spring. The end of the connector is connected with a rotating pulverizing disc. One side of the middle device shell is connected with a controller through a connecting frame, and the other side of the middle device shell is connected with a feeding pipeline. A feeding device is arranged at the end of the feeding pipeline and communicates with a feeding hopper. One side of the lower device shell is provided with a material clearing motor and a discharge port, and the material clearing motor is matched with a material clearing shovel through a transmission device. When the material rubbing and squeezing smashing mechanical device is used, materials can be smashed under the combined action of downward pressure and rubbing force, the smashing intensity is high, and the smashing effect is good; and in addition, the material clearing device is arranged, so that material clearing is convenient and rapid, and working efficiency is high.

The invention discloses a system and a method for controlling a climb form platform. The climb form platform control system comprises a central processing machine, an intelligent sub control machine and sensors. The sensor is installed on each elevator site of the climb form platform and is connected with the intelligent sub control machine of the elevator site; the intelligent sub control machine is connected separately with the elevator device on the corresponding elevator site and the central processing machine. The inventive control method comprises performing promotion of the climb form platform and operation intelligent control via the climb form platform control system, preventing the damage of elevator overload on the elevator site and improving the safety and mechanism automatic level of promoting the climb form platform.

The invention discloses a fork lowering device and a fork descent method of electric forklift. Real-time height of fork in the process of descending can be checked by using a height measurement module. Height value of a fork can be read by using a digital CPU. The digital CPU can also work out speed and accelerate speed of the fork, when the fork is moving. A servo motor and a stepper motor can be driven to move by a pulsing signal which is sent after being processed by the digital CPU. The digital CPU can further control opening size of an oil return port which is on a controlling valve. The digital CPU can make opening size of an oil return port which is on a valve of a hoist cylinder be changed in correspondence with falling head of the fork, and make descent speed of the fork be changed from fast to slow, which belongs to infinite speed mode. The digital CPU can ensure that the speed of the fork can be as fast as possible when the fork is needed to move fast and vice versa. The digital CPU can ensure that fast speed, stability and safety can all be achieved in the process of descending and that impact on a portal frame and overload damage of internal module in a door frame descending device, which are caused by fast speed in the process of descending, can be avoided. A pressure pickup can check load gravity of the fork. The digital CPU can further optimize falling accelerated speed of the fork.

The invention belongs to the field of a tool rest for a numerically-controlled machine tool, and in particular relates to a single-servo power tool rest. In the invention, a tool disk and a power tool are driven by the same servo motor, and the power switchover problem of the tool rest is solved by a sliding gear clutch, wherein, the servo motor is connected with a power input shaft through a moment limiter, the tool disk is transposed through secondary gear transmission, and the power tool is driven by tertiary gear transmission; and the working conditions of the clutch, a triple fluted discand the power tool are controlled by a hydraulic system. Compared with the common servo power tool rest, the single-servo power tool rest has the advantages of low cost, light weight, small volume and the like, and adds an overload protection function.

The invention relates to an inner closed type radial flux magnetic transmission mechanism for an underwater direct-driven propeller. According to the inner closed type radial flux magnetic transmission mechanism for the underwater direct-driven propeller provided by the invention, the opening end of the inner circumference surface of an outer rotor iron core (1) is equipped with multiple dovetail slots II (12) along a radial direction; the multiple dovetail slots II (12) are evenly distributed along the inner circumference surface of the outer rotor iron core (1); a piece of outer rotor magnetic steel (2) is matched and fixed in each dovetail slot II (12); an inner rotor end plate (10) is annularly sleeved on the prime motor rotation shaft (9) of the propeller and is fixedly connected with the outer end of an inner rotor magnet yoke (5); an outer rotor end plate (8) is fixedly connected with the outer end of the outer rotor iron core (1); the opening end of an isolation sleeve (3) is equipped with a connection flange plate (16); and the connection flange plate (16) of the isolation sleeve (3) and a propeller end plate (7) are in sealed connection. The mechanism provided by the invention is applied in the underwater direct-driven propeller.

The invention provides a protective circuit of a power amplifier tube, a method of the power amplifier tube and the power amplifier tube. The protective circuit of the power amplifier tube comprises the power amplifier tube, an input end of the power amplifier tube is connected with an input end of a radio-frequency signal, a drain electrode or a collector of the power amplifier tube is connected with a first power supply (VDD) end, and an grid electrode or a base of the power amplifier tube is connected with a second power supply (VGC) end. The protective circuit of the power amplifier tube further comprises a transient current detector and a controller, wherein the transient current detector is located between the drain electrode or the collector of the power amplifier tube and a direct current power supply end and is used for detecting in real-time the current when the power amplifier tube works, and the controller is connected with the transient current detector and is used for cutting off the radio-frequency signal which is input into the power amplifier tube or controlling the cutting-off of the power amplifier tube when the current detected by the transient current detector is larger than a preset limit value. The protective circuit of the power amplifier tube, the method of the power amplifier tube and the power amplifier tube can avoid injury caused by overload of the power amplifier tube.

The invention discloses a device capable of automatically adjusting the rigidity of a flexible blade of a wind turbine. The device aims at mainly solving the technical problems of easy fatigue and damage and the like in the existing flexible blade. The device is charachterized in that the two ends of an extension spring (8) and a compression spring (9) are respectively connected with a front-end fixed block (5) and a moving inertial block (4) embedded in a linear guide rail (10); one end of each steel wire rope (6) is connected with the inertial block (4); the steel wire rope (6) bypasses a fixed pulley (3) fixed on a supporting block (2), and then penetrates through the front-end fixed block (5) to be connected with a tail-end fixed block (7); two steel wire ropes (6) are symmetrically distributed at the two sides of the inertial block (4). The device disclosed by the invention has the advantages that the structure is simple, the manufacture and the maintenance are convenient, the rigidity of the flexible blade of the wind turbine can be automatically adjusted along with the change of wind speed. In addition, the device has the advantage of expanding the wind-speed range for operation of the wind turbine, and is mainly used for the field of blades of wind-power generation equipment.

The invention relates to a roller pelletizer for sludge ceramsite granulation and belongs to the technical field of pelletizing equipment. In order to solve the problems of low efficiency and high energy consumption at present, the invention provides the roller pelletizer for sludge ceramsite granulation. The roller pelletizer comprises a frame, a driving mechanism, a driving roller and a driven roller, wherein the driving roller is arranged on the frame in a rotatable form through a first rotating shaft; the driven roller is arranged on the frame in the rotatable form through a second rotating shaft; the driving roller and the driven roller are horizontally arranged; a plurality of through holes are formed along the circumferential directions of the roller walls of the driving roller andthe driven roller; the driving mechanism is capable of driving the first rotating shaft to drive the driving roller to rotate; a flywheel is fixed on the second rotating shaft of the driven roller; the flywheel is located on the outer side of the driven roller. The through holes and the flywheel are arranged, so that the overload damage of the power source, such as a motor, in the driving mechanism can be avoided, the energy-saving effect can be achieved, the sludge ceramsite can be prevented from attaching to the through holes, the pelletizing efficiency is increased and the performance of quickly pelletizing can be realized.

The invention provides a forklift fork arm with a weighing function. The forklift fork arm comprises two strip-shaped inserting teeth, two fixed columns, a connecting cross beam, two strip-shaped bearing plates and a data collection box. A power module, a controller, an A/D collection module and a wireless transmitting module are arranged in the data collection box. By means of the forklift fork arm, the strip-shaped bearing plates are firstly in contact with the lower portion of a cargo support, pressure sensors collect pressure data, the pressure data are collected by the A/D collection module and provided for the controller, the controller calculates the cargo overall weight according to the collected data, and the cargo overall weight is compared with a set weight threshold value; andif the weight is larger than the set weight threshold value, alarm information and weighing data are transmitted through the wireless transmitting module, and therefore overload damage of the forkliftfork arm is effectively avoided.

The invention relates to the automobile spare tire external support field, particularly to a spare tire protection and lifting fixing device. The spare tire protection and lifting fixing device comprises a mounting support assembly, a transmission mechanism assembly, a pallet assembly and a steel wire rope. The mounting support assembly comprises a large support, a small support and a transmission pipe, wherein the large support and the small support are fixedly connected to an automobile body and fixedly connected through the transmission pipe; the transmission mechanism assembly is fixedly mounted on the large support, a main shaft in the transmission mechanism assembly is drivingly connected with a transmission disk which is connected with an inner gear disk through gear transmission, and the outside of the inner gear disk is provided with a wire slot; and one end of the steel wire rope is connected with the pallet assembly, the other end of the steel wire rope penetrates through the transmission pipe and is connected with the wire slot of the inner gear disk in a winding mode, and the disk piece of the inner gear disk is provided with lightening holes. According to the spare tire protection and lifting fixing device, the transmission mechanism is reasonable, the weight of moving parts can be lightened through the lightening holes, and labor-saving operation and smooth and stable transmission are achieved.

The invention discloses a dynamoelectric linear actuator with a sealing and lubricating, shock-absorbing and overload protection structure. The dynamoelectric linear actuator comprises a motor, a sliding sleeve, a screw rod and a threaded sleeve matched with the screw rod; a rubber buffer cushion is arranged between the sliding sleeve and the end plane of the threaded sleeve; and an electric cylinder also comprises a corrugated extension tube, a pull pressure sensor and a controller. According to the dynamoelectric linear actuator, the screw rod is sealed through the corrugated extension tube, so that the problem that the screw rod is rusted and damaged due to the contact between steam and the screw rod can be avoided; by setting the rubber buffer cushion between the sliding sleeve and the threaded sleeve, the axial impact force on a thread pair of a screw rod mechanism can be buffered so as to avoid the damage of the thread pair caused by the axial impact force; and by setting the pull pressure sensor in the end part of the sliding sleeve, when the pull pressure sensor detects that the load of the electric cylinder is increased to the ultimate load, the controller controls the motor to stop working so as to perform the overload protection on the electric cylinder to avoid the overload damage of the electric cylinder and to prolong the service life of the electric cylinder.

The invention relates to a current limiting power amplification driving circuit for power line carrier communication, which is used for realizing power amplification of a power line carrier sending signal and is coupled to a power line. The current limiting power amplification driving circuit is characterized by comprising a current limiting block input circuit, a first-stage bias amplifying circuit, a second-stage current limiting amplifying circuit, a third-stage power driving circuit, a feedback circuit and a power line carrier signal coupling circuit. The current limiting block input circuit in the circuit realizes current limiting protection over the power amplifier current input stage; the base voltage lower limit of a triode Q4 in the third-stage power driving circuit is improved by the second-stage current limiting amplifying circuit, and the maximum base current of the triode Q4 is limited, so that the power amplifier circuit is prevented from entering a working dead zone where the Q4 is connected all the time; the second-stage current limiting amplifying circuit has a current limiting effect on the third-stage power driving circuit, so that the triode therein is prevented from being damaged due to overload; and the circuit is suitable for a variable carrier load impedance condition in an actual application field.

The invention discloses a wall repainting device for indoor decoration. The wall repainting device for indoor decoration comprises a main storage shell; a bottom mounting base plate is arranged on theside surface of the main storage shell; and the main storage shell and the bottom mounting base plate adopt an integrated structure. Pressure is applied to liquid painting coating by air pressure with controllability, so that the liquid coating is ejected from a high-pressure ejecting gun, the ejected mist-shaped whitewash can cover the wall surface rapidly, the labor intensity is reduced and thewhitewash efficiency is improved; furthermore, the device is provided with a control mechanism for preventing the air pressure intensity from being too high, so that the non-uniform ejecting phenomenon caused by too high injected air pressure can be effectively avoided; in addition, the device is provided with a control mechanism for preventing overload of an electromotor and can effectively prevent the phenomenon that the electromotor is overloaded and damaged caused by too high air pressure; and the device is provided with a middle clamping and inlaying mechanism, can realize butt joint effect and can guarantee that air leakage of a butt joint part is avoided, so that injection of raw materials and cleaning of the internal parts of parts are realized and the practicability is high.

The invention discloses white smoke removal equipment for flue gas from an exhaust chimney of a chemical plant. The white smoke removal equipment structurally comprises a suction fan, a flue gas treatment device, a flue gas white smoke removal machine body, a flue gas inlet, a drain outlet and supporting legs, wherein the suction fan is mounted at the inner top of the flue gas white smoke removalmachine body; and the flue gas treatment device connected with the flue gas white smoke removal machine body is arranged below the suction fan. Compared with the prior art, the invention has the following beneficial effects: water and particles can be quickly separated, so cyclic utilization of water and collection of particles are facilitated; a shaking head moves up and down, so up-and-down shaking of filter screen is realized, and thus, the filter screen can be effectively prevented from being blocked, timely drainage of water is realized, flowing of water is prevented, and particles can slide down from high potential to low potential and are discharged from the drain outlet; and by additionally arranging a flue gas uniform-dispersing plate, flue gas can uniformly ascend and diffuse, the phenomenon that a water uniform-spraying device is blocked due to accumulation of the flue gas at one position is avoided, particles can uniformly fall onto the high-strength filter screen, the phenomenon that the filter screen is overloaded and damaged due to concentrated falling of the particles fall onto a certain position of the filter screen is avoided, and the filter screen is further prevented from being blocked.

A high-pressure filtering station solves the problems that replacement of a filter element or maintenance of a control valve is difficult under a main body in a filter cartridge or the control valve of a traditional high-pressure filtering station and that high-pressure liquid is fully filled with a combined surface and jets outwards if the sealing between the control valve and the main body is failed. The high-pressure filtering station is characterized in that the filter cartridge is arranged above the main body; the control valve is arranged on the lateral surface of the main body; a liquid inlet trench though hole, a liquid outlet trench through hole, a sewage discharging trench through hole, an annular unloading groove and a linear unloading groove are formed in a valve body of the control valve by processing; a liquid inlet hole, a liquid outlet hole, a sewage discharging hole, a control valve liquid inlet trench through hole, a control valve liquid outlet trench through hole and a control valve sewage discharging trench through hole are formed in the main body by processing; and spare parts arranged in the valve body of the control valve can temporarily form an integrally-inserted valve core. The high-pressure filtering station has the beneficial effects that the replacement of the filter element or the maintenance of the control valve is easily realized; the phenomenon that a large amount of liquid is sprayed due to the fact that a sealing element is damaged is avoided; the liquid passes through a large channel; the flowing resistance of fluid is reduced; and the problem that the liquid in a main liquid supply pipeline flows outwards due to the fact that a work surface stops pumping is solved.

The invention discloses a train dead-hooking treatment system and method. The train comprises a plurality of heavy train sets. The train dead-hooking treatment system comprises a train dead-hooking alarming device and a control device, wherein the train dead-hooking alarming device is used for sending signals which express a dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets; the control device is connected with the train dead-hooking alarming device, and is used for receiving the signals which express the dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets, and controlling a positioning car to stop in the condition that the signals which express the dead-hook phenomenon between the adjacent two heavy train sets in the plurality of heavy train sets are received; and the positioning car is used for drawing and positioning the heavy train sets. With the adoption of the dead-hooking treatment system and the train dead-hooking treatment method, not only can the defects in the prior art of components damaged by overloading and train off-the-road and turnover phenomena be avoided, but also the huge impact brought about by scram of each component in a high-speed operation state can be avoided, the security of equipment can be ensured, and the fault treatment efficiency further can be improved.