30results about How to "Improve unit performance" patented technology

The invention discloses a double-rotor rolling-piston-type expansion engine for a cold water machine set. The expansion engine has a horizontal-type structure and is formed by connecting two cylinders in series; front and rear end covers of cylinder bodies, the cylinder bodies, a two-cylinder gas connecting channel, an oil return chamber and other parts which are sequentially sealed and connected by bolts; cranks are embedded into bearings of the front and the rear end covers of the second cylinder body; a lubricating oil pump is arranged at the outer side of the front end cover of the first cylinder body, and an outlet of the oil pump is connected with an oil supply channel; return oil returns a lubricating oil chamber from the oil return chamber through an oil return channel; the outer end of a crankshaft is nested with a balance weight; and the crankshaft and a flange connected with a motor have the same axle center. The double-rotor rolling-piston-type expansion engine omits a suction control device of a single-stage rolling-piston-type expansion engine, directly utilizes a first cylinder to control suction capacity, adjusts the inner diameter size dimension of two cylinders so as to meet different expansion ratio, and realizes the design with high expansion ratio. By adopting the expansion engine to replace a throttle valve, the expansion work can be easily recovered, the refrigerating output is obviously increased by the cold water machine set, and the performance is stable and reliable.