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The PDF document may at the WAP end of browsing experience poor.Suggest that you first select the TXT, or download the source files to this machine view.Hydraulic and pneumatic technology electronic teaching plan unit fifth hydraulic components and hydraulic basic circuit [] learning requirements and methods Adidas Jeremy Scott Teddy Bear of the hydraulic system, hydraulic control valves used to control the flow pressure, and the direction, to guarantee the implementation of components according to the design requirements for the job.Through the learning, students are required to master the various common valve working principle, structural features, and application of graphic symbol; master the basic hydraulic circuit of the type, composition, working principle and application.Learning, should grasp the essence of the problem, focus on in-depth understanding and grasp of the principle of work; through the graphic control, physical disassembly, loop test and other means to strengthen the understanding and application of.[]: 1 key emphasis and difficulty of reversing valve works, graphic symbol; reversing valve 2 the median function; 3 pressure working principle, application characteristics; graphic symbols, 4 flow valve adjustment principle, graphic symbols, application characteristics; 5 common basic circuit analysis and application.Difficulty: 1 median function; 2 pressure valve working principle; 3 graphic symbols; 4 basic circuit analysis, circuit function characteristics.[] [16 hours recommended class assignments completed comprehensive training [] all the learning content] 1 http://www.jeremyscottnew.com/ knowledge pointsA 1 one-way valve and reversing valve (1) check valves directional control valve and direction control basic loop check valve is used to control the hydraulic system flow direction.1) general check valves check valve's role is only allows fluid flow along one direction, reverse liquid flow is cut Adidas Jeremy Scott Panda Bear off.It requires a positive fluid flow out of the pressure loss of small, reverse liquid flow is cut off when the good sealing performance.35 hydraulic and pneumatic technology electronic teaching plan (a) tube type ordinary one-way valve (b) type ordinary one-way valve (c) 2) graphical symbols for hydraulic control one-way valve -- when the control port K without the pressure of oil inlet, its work and a kind Jeremy Scott Adidas of ordinary one-way valve, pressure oil only from the oil inlet P1 flows to the oil outlet P2, can reverse flow.-- when the control port K with pressure oil inlet, a control piston 1 is right a cavity through the drain, under the action of hydraulic pressure piston moves to the right, to push a push rod 2 top open heart valve, the oil outlet P1 and P2 switches, oil liquid can flow from port P2 port P1.(2) reversing valve 1) reversing valve function change-over valve is the use of the heart valve and the valve body relative position change, make oil switch, cut off or change the direction of the flow of oil, so that the hydraulic actuators to start, stop or change the direction of movement.2) reversing valve classification -- according to the heart valve relative to the valve body movement is divided into slide valve and rotary valve type two.According to the change of heart valve and valve body -- the relative position between the power source category or operation mode is divided into manual, motor, electromagnetic pneumatic, hydraulic and electro-hydraulic etc..(a) manual (b) mobile (c) electromagnetic dynamic (d) spring control (E) fluid dynamic (f) hydraulic pilot control (g) electro-hydraulic control 3) reversing valve working principle of 36 hydraulic and pneumatic technology electronic teaching plan (a) (b) -- when the valves of the heart in a graph (a) position, the valve core of an annular groove on the P and B is A and T, is to the left, the piston motion.