42results about How to "Avoid big shocks" patented technology

The invention discloses a load-sensitive electro-hydraulic proportional multi-way valve and belongs to the technical field of multi-way valves. The load-sensitive electro-hydraulic proportional multi-way valve comprises a first tandem and a second tandem. The first tandem is composed of a safety valve (1), a first pilot electro-hydraulic proportional relief valve (2), a second pilot electro-hydraulic proportional relief valve (5), a first load-sensitive pressure compensation valve (3), a first hydraulic reversing master valve (4) and an overload makeup valve (14). The second tandem is composed of a third pilot electro-hydraulic proportional relief valve (6), a fourth pilot electro-hydraulic proportional relief valve (9), a second hydraulic reversing master valve (11), a floating valve (12) and an LS (load-sensitive) shuttle valve (13). The load-sensitive electro-hydraulic proportional multi-way valve is capable of simultaneously receiving single or multiple control command signals to respectively control output oil circuits of the multi-way valve and is easy for remote control and complex compound action of multiple actuators, energy resources are saved, and environment pollution is reduced.

The invention provides a liquid cooling self-excitation type eddy current retarder with a salient pole structure, belonging to the field of automobile braking. The liquid cooling self-excitation type eddy current retarder comprises a retarder rotor (9), a retarder stator (5), a retarder coil (8), a retarder generator and a control module, wherein the retarder rotor (9) is a tooth-shaped rotary plate; the axial half-section of the tooth-shaped rotary plate is a reverse h shape; two bulges at the both sides of a dentate disc are two salient poles of the retarder rotor (9); the retarder rotor (9) is connected with a transmission shaft (13); the inner circle of the retarder stator (5) and the outer circle of the retarder rotor (9) are coaxial; and the retarder coil (8) is an individual coil, is mounted between the two salient poles of the retarder rotor (9), and is fixedly connected with the retarder stator (5). According to the liquid cooling self-excitation type eddy current retarder provided by the invention, the electric energy is saved and the large impact to an automobile storage battery when the retarder is started is avoided by using a self-generating manner; and the coil is sleeved in the middle of a rotor disc by using the individual coil which is wound in a concentrated manner, so that the winding, the installation and the control of the coil can be simplified.

The invention relates to a load-sensitive electric proportional multi-loop valve. The load-sensitive electric proportional multi-loop valve aims to enable all loops to work with different loads, save energy and reduce environmental pollution. According to the technical scheme, the load-sensitive electric proportional multi-loop valve comprises a main oil path, a raising loop, an inclined joint, an attachment joint, a logical direction valve, a two-way solenoid valve, a proportional electric overflow valve and a two-way hydraulic control reversing valve, the main oil path is communicated with two gear pumps P1, P2, the raising loop is connected to the main oil path through an electronic proportional pressure compensation flow control valve, the inclined joint and the attachment joint are connected to the main oil path through an electronic proportional pressure compensation flow control valve, the logical direction valve is connected to the main oil path, the two-way solenoid valve and the proportional electric overflow valve are connected to an oil inlet of the logical direction valve, and the two-way hydraulic control reversing valve is used for controlling whether the gear pump P2 supplies oil to the main oil path or not. The load-sensitive electric proportional multi-loop valve is applied to the technical field of hydraulic system control valves of 5-10t forklifts.

The invention discloses a crushing device of a garbage classification system, and belongs to the technical field of garbage disposal devices. The crushing device of the garbage classification system comprises a supporting mounting frame and a linkage mechanism. The supporting mounting frame comprises supporting legs, a horizontal mounting frame is fixedly connected to the supporting legs, a firstconnecting frame and a second connecting frame are fixedly connected to the horizontal mounting frame, and a mounting groove is further formed in the middle of the horizontal mounting frame. A garbagecrushing mechanism and a driving mechanism are connected to the first connecting frame and the second connecting frame, the linkage mechanism is connected with the driving mechanism, the lower end ofthe linkage mechanism is connected with a conveying mechanism, the conveying mechanism is installed on the horizontal mounting frame, and a collecting box is arranged below the conveying mechanism. The crushing device effectively solves the problems that the output torque of an existing designed motor is small and the motor is not qualified for garbage crushing, easy to damage and too monotonousin structure and function.

The invention provides a demountable tanker truck and a hydraulic system thereof. The hydraulic system comprises a hydraulic pump, wherein the hydraulic pump supplies oil to a main oil cylinder and a moving oil cylinder through a multi-way valve, the multi-way valve at least comprises a main oil cylinder reversing valve and a moving oil cylinder reversing valve, and the hydraulic system also comprises a first position detection device and/or a second position detection device. The moving state of the main oil cylinder can be controlled according to the first position detection device, and the moving state of the moving oil cylinder can be controlled according to the second position detection device. The synchronism of the operation process of the main oil cylinder can also be ensured, and in addition, the protection on a main oil path can also be realized. The demountable tanker truck and the hydraulic system thereof have the advantages that misoperation can be reduced, the synchronism is high, the anti-impact performance is good, and the like.

The invention relates to a deceleration test tower of a speed limiter. The deceleration test tower comprises a steel structure rack (3), a speed limiter fixing unit arranged at the top of the steel structure rack (3) and used for installing a to-be-tested speed limiter (2), a tensioning wheel component arranged at the bottom of the steel structure rack (3), and a guide rail (4) vertically arrangedup and down along the steel structure rack (3); a counterweight frame (6) is arranged on the guide rail (4), an upper portion of the counterweight frame (6) is connected with a steel wire rope (5), the steel wire rope (5) sequentially bypasses a rope sheave and the tensioning wheel component of the to-be-tested speed limiter (2), and a tail end of the steel wire rope (5) is connected to a lower portion of the counterweight frame (6) to form a closed loop; a buffer mechanism (7) is arranged at the bottom of the guide rail (4), the to-be-tested speed limiter is connected with a data acquisitionunit, the counterweight frame (6) is released to fall from a high position to drive the steel wire rope (5) to move, thereby completing a deceleration test of the to-be-tested speed limiter (2). Thetest equipment is high in test precision and safe in test process.

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.

Disclosed is a tracked vehicle direction control valve comprises a main control valve, a valve handle is arranged at the lower end of the main control valve, a long guide rod is arranged on one side of the valve handle, a fixing disc is arranged at the upper end of the long guide rod, a reversing plate is arranged at the lower end of the fixing disc, and a rotating shaft is arranged at the lower end of the reversing plate. By arrangement of the multi-connecting-rod control mechanism, people can control the vehicle running at a high speed conveniently, huge impact caused by sudden acceleration and deceleration is avoided, the service life of the motor is prolonged, the personal safety of a user is protected, operation difficulty is lowered, and operation comfort is improved; by means of the multi-connecting-rod control mechanism, a user can control left and right running of the tracked vehicle with one hand, operation is easy, and the tracked vehicle can be applied to an open system and a closed system and can be used by people conveniently.

The invention provides a fan linkage stop device. The fan linkage stop device comprises a brake fixed plate, a linkage transmission mechanism fixed base, a stop driving mechanism, a linkage transmission mechanism, a mechanical braking mechanism and a variable pitch braking mechanism, wherein the mechanical braking mechanism and the variable pitch braking mechanism are linked by the linkage transmission mechanism; the mechanical braking mechanism is configured to start mechanical braking for a generator main shaft when the variable pitch braking mechanism finishes variable pitch braking for fan blades, so that the working conditions of the fan blades can be firstly changed through pitch change, the capacity of an impeller capturing wind energy is reduced, and the rotating speed and energy of the impeller are effectively reduced; then, the mechanical braking mechanism is used for braking to effectively prevent higher impact in the fan stop process and overcome the excessive heating and wearing problem in braking; and the whole set of linkage stop device is safer and more stable, so that the whole unit is higher in reliability.

The invention discloses a hydraulic system and method for composite action control of a loading machine. The first hydraulic pump sucks oil from the hydraulic oil tank and is connected with the first control valve, and the first control valve is connected with the movable arm oil cylinder; a second hydraulic pump sucks oil from the hydraulic oil tank and is connected with a third control valve, and the third control valve is connected with a steering gear and a fourth control valve; the steering gear is connected with the right steering oil cylinder and the left steering oil cylinder; the fourth control valve is connected with the second control valve and the first control valve. The second control valve is connected with the tipping bucket oil cylinder; the third control valve preferentially supplies oil to the steering gear, and redundant flow is supplied to the fourth control valve; the fourth control valve preferentially supplies oil to the second control valve, and redundant flow is supplied to the first control valve. Composite action of the movable arm oil cylinder and the tipping bucket oil cylinder is achieved, the two molecular systems can be independently controlled, operation controllability is higher, the pressure and the operation speed of the two molecular systems can be independently set, and overlarge impact during unloading is avoided.

The invention discloses multi-position wafer edge polishing equipment. The multi-position wafer edge polishing equipment structurally comprises a fixed rod, two polishing systems, hydraulic cylindersand a machine body. The two polishing systems are arranged on the top end face of the machine body. The hydraulic cylinders are arranged over the corresponding polishing systems. The hydraulic cylinders are in mechanical connection with the corresponding polishing systems. The fixed rod is arranged at the topmost end of the machine body. Each polishing system comprises an air inlet, a main rod, afolding tube, a fixed disk and an operating platform. The operating platforms are fixed to the locations over the machine body. The fixed disks are arranged over the corresponding operating platforms.Through cooperation of the hydraulic cylinders, the main rods and the fixed disks, the multi-position wafer edge polishing equipment fixes wafers through hold-down of the hydraulic cylinders to prevent the wafers from sliding relatively in the fixing process. The multi-position wafer edge polishing equipment adsorbs the wafers in an air extraction mode through cooperation of the fixed disks, theair inlets and the like, sucks and adsorbs the interiors and exteriors of the wafers simultaneously through suction inner rings and suction outer rings to guarantee that adsorption force to the wafersis uniform and the wafers cannot be broken in half from the middles.

The invention discloses a construction method for reducing energy consumption of a wound-rotor motor. The method comprises the following steps: first of all, short-connecting a rotor of the wound rotor motor with three lead-out wires connected with a collector ring through a short circuit board; and then additionally installing a control system between a starting power source and a constructed wound rotor motor. The application rate of the motor is improved, production safety can be guaranteed, the electricity consumption cost is greatly decreased, safe and stable operation of a power plant is ensured, the cost is not high, and manufacturing and maintenance are convenient.

The invention relates to a discharge nozzle of a stone hoist, and belongs to the technical field of machinery. The discharge nozzle comprises a discharge nozzle enclosing plate. A steel angle flange is arranged at the front end of the discharge nozzle enclosing plate, and a plurality of steel angles are arranged on the lower end surface of the discharge nozzle enclosing plate. The discharge nozzle of the stone hoist has the advantages that stone which is thrown into the discharge nozzle by a hopper can be cushioned by the steel angles, so that shortcomings of high impact on enclosing plates at the bottoms of existing discharge nozzles due to direct discharging modes and easiness in perforating the steel plates due to long-term usage can be overcome, the enclosing plate at the bottom of the discharge nozzle can be effectively protected, and the service life of equipment can be prolonged.

According to a carbon tank electromagnetic valve opening control method, after it is judged that a carbon tank electromagnetic valve meets the enabled opening condition, the carbon tank electromagnetic valve is opened according to the target opening degree and the initial opening speed determined by the current working condition, and a real-time fuel oil adjusting coefficient is obtained from a system, specifically, if the current fuel oil adjusting coefficient is smaller than a first set value, the carbon tank electromagnetic valve is kept in the current opening degree until the fuel oil adjusting coefficient is equal to a second set value, if the current fuel oil adjusting coefficient is larger than the second set value, the opening degree and the opening speed of the carbon tank electromagnetic valve are corrected till the set target opening degree is achieved, and the fuel oil adjusting coefficient is a calculated value of the system for correcting the fuel injection quantity and controlling the target excess air coefficient at a theoretical value. According to the method, the concentration of carbon tank mixed gas is judged by utilizing a fuel oil correction coefficient for the first time, so that the opening speed and the target opening degree of the carbon tank electromagnetic valve are controlled, large impact of the the thick mixed gas from a carbon tank on the air-fuel ratio can be effectively avoided, and the problems of vehicle flameout and the like are avoided.