36results about How to "Smooth shutdown" patented technology

The invention discloses a halt control method and system of a hybrid power vehicle. The halt control method comprises the steps of: judging a reversal-preventing control entry condition; if according with the reversal-preventing control entry condition, controlling an engine to prevent from reversing, wherein the control step comprises the procedures of detecting in real time to obtain an engine rotating speed signal of reflecting a rotating speed of an engine; comparing the rotating speed signal of the engine with a preset ideal rotating speed of the engine to obtain a rotating speed difference; calculating the rotating speed difference through a PID controller to obtain a theoretical target motor output torque, calculating according to the theoretical target motor output torque to obtain an actual target motor output torque needing being implemented by a motor, sending a command for implementing the actual target motor output torque to the motor; and implementing the actual target motor output torque by the motor, and acting the torque implemented by the motor to the engine. Therefore, the reversal of the engine before automatic halt can be prevented.

The invention discloses an automatic halt control method and system for a hybrid power vehicle. The control method comprises the following steps: judging whether a system conforms to a condition for entering an automatic halt working condition; if so, performing a step of stopping supplying oil to an engine; and after oil is stopped to supply to the engine, immediately performing the following control steps of protecting the engine from inversion: detecting and obtaining an engine revolving speed signal which reflects the engine revolving speed in real time, according to the engine revolving speed signal, calculating to obtain a practical target motor output torque which needs to be implemented by the motor, sending a command for implementing the practical target motor output torque to the motor, implementing the practical target motor output torque by the motor according to the command, and acting the torque implemented by the motor to the engine, thus the engine is protected from inversion before automatic halt.

The invention discloses a constant voltage frequency ratio control system of a multi-motor driving belt conveyor, wherein each motor is controlled through an independent frequency converter, a primary frequency converter and each secondary frequency converter are connected through a communication line, and each frequency converter can detect active current. Startup procedures of a constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step a is that startup signals are received and broadcasted; a step b is that the multi-motor driving belt conveyor is started in a constant voltage frequency ratio control mode; a step c is that the secondary frequency converters are in operation; a step d is that whether the active current is in an allowed range is detected; and a step e is that frequency of each secondary frequency converter is adjusted. Operation procedures of the constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step g is that operation frequency and the active current are broadcasted; a step h is that the active current is judged; and a step i is that the frequency is adjusted. Shutdown procedures of the constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step j is that shutdown signals are received and broadcasted, and a step k is that the multi-motor driving belt conveyor is stopped in the constant voltage frequency ratio control mode. Through the constant voltage frequency ratio control system and the constant voltage frequency ratio control method of the multi-motor driving belt conveyor, all the motors basically have the same output torque, and therefore the problem that the motors are at the same rotating speed but have different output torque due to the facts that rotary drums are different in size and the sizes of belt wrap angles are not constant is solved, and the multi-motor driving belt conveyor is enabled to be started and stopped stably and can operate with high efficiency.

The invention discloses a safe elevator open-loop control machine. The safe elevator open-loop control machine comprises an elevator driving motor, an elevator frequency converter, an elevator controller, an emergency power supply system and a fire-fighting monitoring system, wherein the elevator frequency converter is electrically connected with the elevator driving motor; a signal output end ofthe elevator controller is connected with a signal input end of the elevator frequency converter; a signal output end of the fire-fighting monitoring system is connected with a signal input end of theelevator controller; the fire-fighting monitoring system comprises a temperature sensor, a smoke sensor and an air quality monitor; the emergency power supply system comprises a power switch contactor and an emergency power supply; the emergency power supply is electrically connected with the power switch contactor; and a signal output end of the power switch contactor is connected with a signalinput end of the elevator frequency converter.

The invention provides a shunt down method of a fixed bed Fischer-Tropsch synthesis process. The shunt down method comprises the following steps: when a device is shunted down after a fixed bed Fischer-Tropsch synthesis reaction is finished, firstly, maintaining the temperature of a catalyst bed layer to be unchanged; leading nitrogen from the inlet of a reactor, and simultaneously, cutting off raw material gas for feeding; maintaining the amount of a circulating gas to be unchanged; after replacing to the required condition, gradually reducing the pressure of a reactor, and then gradually reducing the temperature of the catalyst bed layer; and when the temperature of the bed layer is reduced to less than100 DEG C, gradually completing shunt down. Compared with the prior art, by using themethod in the invention, the side influence to the catalyst bed layer in the shunt down process is reduced while stable shunt down is achieved, thereby proving a good guarantee for subsequent reworking and catalyst unloading.

A damper opening and closing angle varying mechanism of a hinge comprises a blocking element, a connection element and a lever element which are in hinge fit with one another. A damper is arranged between the blocking element and the connection element. One end of the damper is rotationally arranged on the blocking element, and the other end of the damper abuts against the connection element. The connection element, the lever element and the damper are linked with one other relative to the blocking element when the hinge is opened or closed. When the hinge is closed by at least one certain angle, the lever element acts on the damper and drives the damper to slide on the connection element in a limited mode, the damper is compressed and generates damping force, and thus, damped closing of the hinge is achieved. Through the structure improvement, the damper opening and closing angle varying mechanism of the hinge has the characteristics that the structure is simple and reasonable, safety and reliability are achieved, production and implementation are easy, adjustment is fast, operation is convenient, the service life is long, practicability is high, and the opening and closing process is labor-saving, smooth, small in collision and low in noise.

The invention discloses a hydraulic energy storage type wind generation set. The hydraulic energy storage type wind generation set at least comprises a power source set, a power generation set and anenergy storage set; the power source set comprises a wind wheel, a gear ring in transmission fit with the wind wheel, a plurality of planet wheels engaged with the gear ring and constant-pressure variable hydraulic pumps with the power input ends in transmission fit with the planet wheels; clutches are arranged between the constant-pressure variable hydraulic pumps and the planet wheels, the powergeneration set comprises a plurality of hydraulic motors and power generators, and the power generators are matched with the rated power of the hydraulic motors and are driven by the hydraulic motors; and the energy storage set is used for storing energy when the clutches are closed but no power generation demand exists, and energy is released to drive the power generation set to generate power when the clutches are disconnected. According to the hydraulic energy storage type wind generation set, the number of the constant-pressure variable hydraulic pumps can be selected through connected ordisconnected of the clutches, the number of the constant-pressure variable hydraulic pumps is adaptively matched and operated according to the magnitude of wind power, the adaptability of the generator power and the wind wheel power is high, it is effectively guaranteed that the hydraulic power is matched with the generator power, and the wind energy utilization rate and the power generation quality are improved.

The invention discloses an automatic control system of plastic drainage board inserting equipment. The automatic control system comprises an electric control system and a mechanical transmission system. The electric control system comprises a master controller, a programmable logic controller and a rotary encoder. The mechanical transmission system comprises a motor, a speed reducer, a clutch and a brake. The master controller controls the programmable logic controller. The rotary encoder is connected with a winding drum of a winch. The output end of the rotary encoder is connected with the input end of the programmable logic controller. The programmable logic controller controls the motor which is connected with the clutch through the speed reducer. The programmable logic controller controls engaging or disengaging of the clutch. The programmable logic controller controls releasing or using of the brake. The automatic control system has the advantages of being simple in structure, convenient to use and maintain, stable in running and stopping, quick in action response and good in operability, safety and adaptability, and meanwhile the working efficiency and the construction quality of the plastic drainage board inserting equipment can be effectively improved.

The invention discloses a constant voltage frequency ratio control system of a multi-motor driving belt conveyor, wherein each motor is controlled through an independent frequency converter, a primary frequency converter and each secondary frequency converter are connected through a communication line, and each frequency converter can detect active current. Startup procedures of a constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step a is that startup signals are received and broadcasted; a step b is that the multi-motor driving belt conveyor is started in a constant voltage frequency ratio control mode; a step c is that the secondary frequency converters are in operation; a step d is that whether the active current is in an allowed range is detected; and a step e is that frequency of each secondary frequency converter is adjusted. Operation procedures of the constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step g is that operation frequency and the active current are broadcasted; a step h is that the active current is judged; and a step i is that the frequency is adjusted. Shutdown procedures of the constant voltage frequency ratio control method of the multi-motor driving belt conveyor include multiple steps, wherein a step j is that shutdown signals are received and broadcasted, and a step k is that the multi-motor driving belt conveyor is stopped in the constant voltage frequency ratio control mode. Through the constant voltage frequency ratio control system and the constant voltage frequency ratio control method of the multi-motor driving belt conveyor, all the motors basically have the same output torque, and therefore the problem that the motors are at the same rotating speed but have different output torque due to the facts that rotary drums are different in size and the sizes of belt wrap angles are not constant is solved, and the multi-motor driving belt conveyor is enabled to be started and stopped stably and can operate with high efficiency.

An integrated optimization mechanism for damping a hinge comprises a retaining element, a first connection arm element and a second collection arm element all of which are in hinged fit. A damper is arranged between the retaining element and the first connection arm element, one end of the damper is rotationally arranged on the retaining element, and the other end of the damper slides on the first connection arm element in a limiting manner, the second connection arm element is provided with an action part, and when the hinge is opened or closed, the first connection arm element, the second connection arm element and the damper are linked relative to the retaining element. When the hinge at least is closed by a certain angle, the second connection arm element acts on the damper through the action part and drives the damper to slide on the first connection arm element in a limiting manner, and the damper is compressed and produces damping force so that damping closing of the hinge can be achieved. The integrated optimization mechanism has the beneficial effects that the structure is simple and reasonable, safety and reliability are achieved, production and achievement are easy, adjusting is quick, operation is convenient, the service life is long, and in the opening and closing process, labor is saved, smoothness is achieved, collision is small and noise is low, and practicality is high.

The invention discloses a halt control method and system of a hybrid power vehicle. The halt control method comprises the steps of: judging a reversal-preventing control entry condition; if according with the reversal-preventing control entry condition, controlling an engine to prevent from reversing, wherein the control step comprises the procedures of detecting in real time to obtain an engine rotating speed signal of reflecting a rotating speed of an engine; comparing the rotating speed signal of the engine with a preset ideal rotating speed of the engine to obtain a rotating speed difference; calculating the rotating speed difference through a PID controller to obtain a theoretical target motor output torque, calculating according to the theoretical target motor output torque to obtain an actual target motor output torque needing being implemented by a motor, sending a command for implementing the actual target motor output torque to the motor; and implementing the actual target motor output torque by the motor, and acting the torque implemented by the motor to the engine. Therefore, the reversal of the engine before automatic halt can be prevented.

The invention provides a generator one-key start-stop control system, which includes a one-key signal input circuit, a temperature acquisition circuit, a rotating speed acquisition circuit, a controller U1 and a start-stop execution circuit. The input end of the one-key signal input circuit is connected with a Bluetooth receiving module and a start button, and used for receiving a Bluetooth start-stop signal or a key start-stop signal and inputting the signals to the controller U1; the input end of the temperature acquisition circuit is connected with a temperature sensor, and used for receiving a temperature signal of an engine of a generator detected by the temperature sensor and transmitting the signal to the controller U1; the input end of the rotating speed acquisition circuit is connected to a three-phase power line of the generator, and used for collecting the rotating speed of the engine and outputting the rotating speed to the controller U1; the controller U1 is used for receiving the start-stop signal output by the one-key signal input circuit, receiving the temperature and rotating speed signals, and controlling the start-stop execution circuit according to the temperature and speed signals; and the start-stop execution circuit is used for receiving a control signal output by the controller U1 to perform the start-stop action. According to the generator one-key start-stop control system, a key or Bluetooth mode is used for starting or stopping the engine of the generator, so as to convenient to control; and furthermore, stability of the whole generator one-key start-stop control system is good, and stability of the starting and stopping processes of the engine of the generator can be ensured.

The invention discloses a method for establishing a halt instruction curve of a host computer of a centrifugal dynamic flight simulator. The method comprises the following steps of: establishing an initial curve, wherein a rotating speed of the hose computer before the starting of the halting moment is indicated by a first segment, a target halting rotating speed after the ending of the halting moment is indicated by a third segment and an oblique line segment connected between the first segment and the third segment is arranged as a second segment; redefining the three segments and adding or reducing two segments at corners; and correcting the initial curve, thereby acquiring an optimized halt instruction curve. The method disclosed by the invention is suitable for the centrifugal dynamic flight simulator, can be utilized to stably and quickly halt at any moment and under any states and can be used for effectively solving the problems of vibration and shocking of the host computer in the halting process of the centrifugal dynamic flight simulator so as to guarantee the safety of the pilot.

The invention relates to a synchronously following type aircraft forced landing platform, which is auxiliary equipment for forced landing due to the failure of an aircraft landing gear. The synchronously following type aircraft forced landing platform can move ahead on a runway at the speed which is equal to the horizontal instant speed of a forced landing aircraft which is about to land to synchronously follow the forced landing aircraft to move, so that the forced landing aircraft can land on the forced landing platform safely with zero impulse force in a horizontal direction. The forced landing platform can also carry the forced landing aircraft to reduce the speed by braking on the runway to consume the kinetic energy of the forced landing aircraft, so that the safe aircraft brake is realized; and a buffering retardant layer is arranged on the platform, so that the comprehensive impact force generated when the forced landing aircraft lands on the platform is buffered to prevent the aircraft belly from being damaged due to deformation, and the frictional force between the aircraft and the platform is increased to prevent the aircraft from generating sliding movement on the platform due to inertia when the aircraft is decelerated on the runway of the platform, and thus the safety of the integral forced landing process is ensured.

The invention discloses a variable damper which comprises a baseboard, an isolation spring, a damping cylinder, a damper regulator, damping medium, a piston, a sealing ring and a top board; the isolation spring is fixedly arranged between the baseboard and the top board; the damping cylinder is arranged on the baseboard and filled with damping medium; the piston is arranged in the damping cylinder; the sealing ring is arranged at the opening of the damping cylinder and seals the gap between the piston and the damping cylinder; the extending end of the piston is fixedly connected with the top board; the lateral side of the damping cylinder is provided with a pipeline; and the damper regulator is arranged at the middle of the pipeline. The damping effect of the inventive variable damper is variable and can be meticulously and continuously regulated, thus satisfying requirements of various occasions with frequent vibration working condition variation.