6results about How to "Good oil return effect" patented technology

The present application relates to a kind of oil and fat compositions, the composition contains melanoidin and oil and fat component, the content of melanoidin is 50-1000ppm, preferably 100-1000ppm, relative to the total weight of oil and fat composition;The weight average molecular weight (Mw) of the melanoidin is ≤7kDa, preferably 3k-7kDa;The solid fat content of the oil and fat composition is 16-20% at 20 ℃, preferably 16.5-18%.The oil and fat composition containing melanoidin of the present application can improve the oil penetration and oil return of Chinese style center point, so that the snack becomes more oily, crisp.

The application belongs to the field of aero-engines, and particularly relates to a high sealing reliability aero-engine lubricating oil ventilation system. The thickness of the front and middle oil return stage rotors in the oil return pump set is increased, the oil return capacity of the front and middle oil return stages is increased, the oil return effect of the bearing cavity is improved, and oil leakage is avoided. Controllable ventilation electromagnetic valves are arranged in the ventilation pipelines of the front and middle bearing cavities. When the engine is at a low speed, the front and middle cavities are closed for ventilation. Under the suction of the oil return pump set, the cavity pressure of the front and middle cavities is reduced, the sealing pressure difference is increased, the sealing reliability is improved, and oil leakage of the front and middle cavities is avoided.

The utility model relates to the technical field of compressor precision manufacturing, in particular to a high manganese steel oil baffle seat which comprises an oil baffle seat body, a mounting hole is formed in the middle of the oil baffle seat body, a plurality of connecting columns are annularly arranged on the oil baffle seat body, connecting holes are formed in the connecting columns, and the outer sides of the connecting columns are in a step shape. An oil collecting mechanism is arranged on the surface of the oil baffle seat body, and leaked lubricating oil is collected and flows back through the oil collecting mechanism. The lubricating oil collecting mechanism is arranged to collect lubricating oil and throw the lubricating oil inwards in the flowing direction, so that the lubricating oil flows back and is reused, consumption of the lubricating oil is reduced, the using effect of the lubricating oil is improved, and resources are effectively saved.

The six-groove valve sleeve of the steering engine comprises a cylindrical main body, and a central through hole is formed in the center of the main body in a penetrating mode. A plurality of fin grooves are embedded in the outer wall of the main body, a plurality of frosted grooves are embedded in the inner wall of the main body, and an oil inlet hole penetrates through the outer wall of the main body; six oil grooves which are circumferentially and uniformly distributed are embedded in the inner wall of the main body, oil holes which penetrate through the main body are formed in the oil grooves, and annular grooves are embedded in the outer wall of the main body corresponding to the oil holes; an oil return groove is embedded in the inner edge of the top end of the body and internally provided with an oil return through hole penetrating through the body. On the basis of the fin grooves, heat dissipation can be conducted on the valve sleeve and the valve body, and the situation that due to long-time work, oil liquid temperature rise is caused, and the lubricating performance is affected is avoided; the frosted groove is formed, the oil storage effect is better, and the lubricating effect between the valve sleeve and the valve body is improved; and through the oil guide structure that six oil grooves are matched with a plurality of through grooves, the oil return effect is better, and reliability is high.

The invention discloses a control method of a heat pump system, the heat pump system and a storage medium. The heat pump system comprises a refrigerant main path and a refrigerant branch path, the refrigerant main path comprises a compressor, an indoor unit, an outdoor heat exchanger and a reversing assembly, the refrigerant branch path comprises an energy storage device and a first control valve, one end of the refrigerant branch path communicates with an exhaust port of the compressor, and a pipeline between the indoor unit and the outdoor heat exchanger communicates with the other end of the refrigerant branch path; the method comprises the steps that when the heat pump system is in an oil return mode, a first control valve is controlled to be opened, and a reversing assembly is controlled to operate, so that an outdoor heat exchanger communicates with an exhaust port of a compressor, and an indoor unit communicates with an air return port of the compressor; the supercooling degree of the energy storage device is obtained; and the opening degree of the first control valve is controlled according to the supercooling degree, so that compressor oil in the refrigerant branch flows back to the compressor. The oil return effect of the pipeline where the energy storage device is located is improved, and the compressor is prevented from being damaged due to oil shortage.

The utility model relates to refrigeration equipment technical field especially relates to a kind of high-efficiency shell and tube heat exchanger and refrigerant distribution structure, comprising: heat exchange tube bundle in shell body;Pipe plate that closed shell body end portion;Pipe box is connected to pipe plate, and pipe box is equipped with refrigerant liquid interface;One distribution plate and secondary distribution plate are arranged in pipe box;Primary distribution plate is fixed in the inner end portion of refrigerant liquid interface;Secondary distribution plate covers the tube mouth of heat exchange tube bundle.The scheme has the advantages of improving refrigerant distribution uniformity, avoiding phase separation phenomenon, improving heat exchange efficiency and solving compressor oil return problem.