52results about How to "Guaranteed normal start" patented technology

The invention discloses an electromagnetic switch protective structure and a mounting method thereof. The electromagnetic switch protective structure comprises an electromagnetic switch body (1), a guide cylinder (2) mounted on the electromagnetic switch body (1), and an movable iron core draw bar (3) mounted on a movable iron core end surface (8). The guide cylinder (2) is provided with a U-shaped positioning snapping groove (4), and the movable iron core draw bar (3) is provided with a positioning snapping groove (5). The electromagnetic switch protective structure also comprises a bowl-shaped rubber sealing cover (6), the bottom of the bowl-shaped rubber sealing cover (6) is provided with a central hole, the portion of the central hole is snapped inside the positioning snapping groove (5), and an opening end is mounted inside the U-shaped positioning snapping groove (4). According to the electromagnetic switch protective structure, the U-shaped positioning snapping groove and the positioning snapping groove achieve the positioning of the bowl-shaped rubber sealing cover and further achieve the sealing of the periphery of the guide cylinder to complete the protection to the movement of the movable iron core of an electromagnetic switch; meanwhile, an air exhaust device on the bowl-shaped rubber sealing cover can well release the negative pressure of the electromagnetic switch.

The invention relates to an intelligent power management system. Under the condition that an engine of a whole vehicle is not started, the aging state, the electric quantity state, the voltage state and the current state of a storage battery are recorded in real time through a storage battery sensor and sent to a power management controller, and the states of the storage battery are defined into four types of power management level signals (PMS_level) and low battery electric quantity signals (Low Power Warning) according to an algorithm of the battery management controller; then the four types of the power management level signals and the low battery electric quantity signals are sent to load controllers such as an air conditioner controller, a DVD controller and a lamplight controller through a CAN network; and all the load controllers conduct corresponding load management according to the received level signals, the state of the storage battery is monitored in real time, and therefore a user is reminded of the condition of the electric quantity of the storage battery. By the adoption of the intelligent power management system, power use classified management of loads of the whole vehicle is achieved, and the purposes of reducing the electric quantity consumption of the storage battery and prolonging the service life of the storage battery are achieved.

A position control method, position control device and electric tool with this position control device, the position control device has the general-purpose motor (13), actuating unit (20), which connected with the general-purpose motor (13) to fulfill the position switching, a pulse generator (10), for generating the variable pulse signals; processing (11) unit, for continuous collecting and processing the pulse signals and generating the relevant pulse width modulation signals; circuit (12) for connecting the processing unit and general-purpose motor, which output the pulse width modulation signal to the general-purpose motor (13), which receive and fulfill the pulse width modulation signal to drive the actuating unit (20) and fulfill the position switching, this position control device may realize the precision open-loop control of position switching in real-time.

The invention relates to a two-dimensional blade profile optimization method for a compressor considering a low Reynolds number working performance; the optimization method is characterized by comprising the following steps of: step 1: analyzing the meridional flow performance of a prototype multistage axial flow compressor at different rotating speeds; step 2: determining a key two-dimensional blade profile section to be optimized; step 3: performing parametric fitting to the key two-dimensional blade profile in step 2; step 4: analyzing the aerodynamic performance of the two-dimensional blade profile, and analyzing the aerodynamic performance of the parameterized two-dimensional blade profile to obtain the variable attack angle performance of the blade profile under a low Reynolds numberworking condition and the variable attack angle performance under a high Reynolds number working condition; and step 5: optimizing the modeling parameters of the two-dimensional blade profile, adjusting the two-dimensional modeling parameters according to the variable attack angle performance parameters of the two-dimensional blade profile obtained in step 4 at different Reynolds numbers, using agenetic algorithm to circularly iterate steps 3 and 4 until a two-dimensional blade profile design reducing loss and increasing stall margin is obtained, and then obtaining a new two-dimensional blade profile. According to the invention, the performance optimization of the two-dimensional blade profile of the axial flow compressor at different Reynolds numbers and different attack angles is realized; the designed working performance of the compressor is improved while the aerodynamic performance of the compressor at the low rotation speed working condition is improved; and the flow efficiencyis improved while the normal starting and stable working of the compressor are ensured.

The invention discloses a regulation device with a symmetric type variable structure for a supersonic inlet. The regulation device comprises a front body compression plate, a throat upper panel, a combustion chamber upper panel, regulation devices and sliding mechanisms, wherein the front body compression plate and the combustion chamber upper panel are connected with the throat upper panel through the sliding mechanisms and the regulation devices; the regulation devices are symmetrically fixed to the throat upper panel; and a plurality of sliding mechanisms are symmetrically installed on the front body compression plate and the combustion chamber upper panel respectively. According to the regulation device, through the regulation devices, the size of a compression angle of an inlet duct and the height of a throat are changed, the quality and the air flow of an airflow which enters a combustion chamber, and the inlet duct is in a better working state; when the inlet duct works at a low Mach number, the compression angle of the front body compression plate is reduced, and meanwhile, the height of the throat is increased so as to change the starting performance of the inlet duct and improve the performance of an engine; and along with increase of the Mach number, the compression angle is increased, the height of the throat is also reduced, the internal contraction ratio is increased, the static pressure at the outlet of the inlet duct is strengthened, and the overall performance of an aircraft is improved.

The invention discloses a method for cutting off and threading of strip steel, and belongs to the technical field of strip steel rolling in coupled pickling and tandem rolling. The method comprises the following steps: choosing strip steel to be halted, reducing a shunt winding cutting speed of the strip steel during shunt winding and cutting; shutting down a rolling mill after shunt cutting and shunting rolling at an outlet, reeling the cut strip steel and unreeling by using a reeling machine and lifting rolling gaps of all racks; choosing a current rack required for overhauling, withdrawing the strip steel by back running and stacking the strip steel to the front side of the current rack, and overhauling the current rack; threading the strip steel of the current rack into the current rack after the overhauling is completed, inching the current rack to thread forwards to ensure that the strip steel of the current rack returns to the position before the back running; tensioning the strip steel by using a pinch roll, pressing down the rolling gaps of all racks, and starting and rolling. According to the method, the rolling mill is started by using normal rolling strip steel instead of thick strip steel, the thickness fluctuation of the rolled steel coil is small and the thickness fluctuation part is positioned at the head of the strip steel, so that rolling wastes are reduced, and the finished product rate is increased.

An electronic thermostat with a compressor starting function, which consists of a power supply circuit [1], a single chip microcomputer [7], a compressor switch circuit [3], a compressor starting circuit [2], a temperature compensation circuit [4], a temperature adjustment circuit It is composed of detection circuit [5] and LED light group [6]. The thermostat consists of a single-chip microcomputer to form a control system. Its power supply circuit adopts capacitor step-down, and then the positive and negative half-waves are processed separately. After being rectified, filtered and stabilized, it provides power to the LED lamp group [6] used for internal lighting of the refrigeration appliance; there are two connecting wires between the compressor starting circuit [2] and the compressor [Cp], one of which is connected to the compressor starting winding [ S] connection, and the other is connected with the common end [C] of the starting winding [S] and the main winding [M] of the compressor. The thermostat uses a very simple circuit to realize the function of a traditional compressor without power consumption starter on the electronic thermostat. The circuit is simple, the cost is low, and the application range is wide.