3 results about "Reverse effect" patented technology

The shield tunneling machine dual-slurry injection anti-reverse structure provided by this invention includes a diversion block fixed inside the rear shield shell plate. The diversion block has a flow channel connecting liquid hole A and liquid pipe B. By making the flow channel pass through both ends of the diversion block along its length, the flow channel includes coaxially arranged inlet and outlet sections, as well as multiple annular flow channels connected in series between the inlet and outlet sections. Each annular flow channel includes an inclined section and a semi-annular section bypassing both ends of the inclined section. The inclined sections of adjacent annular flow channels have opposite inclination directions, and the semi-annular sections of adjacent annular flow channels are located on both sides of the axis of the inlet section, making the semi-annular sections teardrop-shaped. This allows the flow channel to form a Tesla flow channel with anti-reverse function, thus taking into account both diversion and anti-reverse functions. The structure is simple, has low manufacturing cost, high structural strength, can resist the impact of propulsion cylinder support shoes, is easy to disassemble and assemble, and has stronger buffering effect of anti-reverse effect, which can reduce the probability of blockage. After blockage, multiple methods can be used to clear it, and the handling flexibility is better.

The application discloses a kind of with anti-reverse H bridge drive circuit, including power supply positive pole VDD and power supply negative pole GND, anti-reverse, control level conversion and dead zone control circuit, transistor NM5 and H bridge drive circuit, power supply positive pole VDD directly to anti-reverse, control level conversion and dead zone control circuit power supply, and it is powered to H bridge drive circuit by the transistor NM5 of anti-reverse effect, can prevent power voltage reverse connection, avoid reverse connection misoperation burn chip, while anti-reverse circuit is realized using N type MOS tube, compared with P type MOS tube realization has smaller on-resistance, also saves chip area.

The utility model relates to a kind of anti-reverse impeller, including impeller connecting part, flow limiting panel and more than one arc-shaped guiding water leaf panel. Impeller connecting part has mounting hole, can be installed on arbitrary shaft;Flow limiting panel is set on impeller connecting part;Arc-shaped guiding water leaf panel is vertically installed on flow limiting panel, and it is circumferentially distributed. Flow limiting panel is respectively provided with notch on the two sides of each arc-shaped guiding water leaf panel, to improve the elasticity of flow limiting panel. Compared with prior art, the utility model optimizes notch position, retains the connecting structure of the bottom of guide vane, improves the overall strength and impact resistance of guide vane, thereby improves anti-reverse effect and service life.