3 results about "Friction loss" patented technology

The invention discloses a compressor and an air conditioning system. The compressor comprises a pump body and a crankshaft having an eccentric part, wherein the pump body comprises: a gas cylinder, wherein the gas cylinder has a gas cylinder chamber and a blade groove positioned on the inner circumferential surface of the gas cylinder chamber; an upper cylinder cover and a lower cylinder cover forclosing the gas cylinder chamber; a first piston and a second piston positioned in the gas cylinder chamber, wherein the first piston is sleeved outside the second piston, the first piston and the second piston can slide opposite to each other, the second piston sleeve is sleeved outside the eccentric part of the crankshaft, and the second piston and the eccentric part of the crankshaft can slideopposite to each other; and a blade, wherein the blade projects out from the blade groove into the gas cylinder chamber, forms butt joint with the first piston, and separates the gas cylinder chamberinto a high pressure side and a low pressure side. With the compressor of the present invention, the friction loss between the piston and the eccentric part of the crankshaft can be reduced so as toimprove the mechanical efficiency of the compressor.

The invention relates to an anti-wear mixed flow water turbine capable of adapting to high head, high rotation speed and high sand content. The anti-wear mixed flow water turbine comprises a volute, afixed guide vane, a movable guide vane, a rotating wheel and a draft pipe. The movable guide vane molded lines are symmetrical two cubic curve assembly, which makes the velocity in the guide vane area and the resistance loss in the flow passage smaller and the flow more smoothly, and effectively reduces the wear of sediment to the guide vane outlet area; and the newly designed long and short vanerotating wheel can better match the flow field and the structural strength of the rotating wheel, and significantly reduce the wear of sediment to the outlet side of the rotating wheel. The thickness change rule of rotating wheel diameter, vane wrap setting angle, vane inlet angle and the vane from inlet to the outlet can be designed newly through the long and short vane rotating wheel, so thatthe flow field can be matched better, the structural strength of the rotating wheel is better, and the wear of the sediment to the outlet side of the rotating wheel.

The invention discloses an experimental system for measuring friction loss of high-pressure fluid in a rotor-static gap and a working method of the experimental system, and belongs to the technical field of turbomachinery design and analysis. Compared with a conventional friction loss measurement method, the influence of bearing friction loss and graphite ring sealing device friction loss in the experiment table main body device on measurement of the friction loss of the fluid in the rotating and static gap is eliminated, and the measurement precision of fluid friction is greatly improved. Meanwhile, when the friction loss of the bearing and the friction loss of the graphite ring sealing device are measured, the fluid pressure in the rotor-static gap is fully reduced to reduce the influence of the fluid friction loss, and the measurement precision is improved. By improving the shaft end sealing technology, the friction loss of the high-pressure and high-density supercritical fluid in the rotor-static gap is measured. According to the method, high-precision measurement of the friction loss of the high-pressure fluid in the rotor-static gap is realized, and the method can be used for checking a numerical simulation method and a friction loss prediction model.