4results about How to "Improve flow coefficient" patented technology

The utility model provides a stop valve, and belongs to the technical field of stop valves. The problems that in the prior art, a valve clack is unstable in installation and poor in flow guiding effect are solved. The valve comprises a valve body, a valve clack body, a sealing cover and a valve rod, the outer portion of the valve body is in a symmetrical oval shape, an inlet flange and an outlet flange are formed on the two sides of the valve body respectively, a connecting flange is formed at the upper end of the valve body, a flow guide body is formed in the valve body, and a through installation circulation hole is formed in the middle of the flow guide body. An upper partition arm and a lower partition arm are formed at the upper and lower diagonal angles of the flow guide body respectively, an upper flow guide channel and a lower flow guide channel are formed between the upper partition arm and the valve cavity and between the lower partition arm and the valve cavity respectively, the sealing cover is fixedly connected with the connecting flange, the valve clack body is fixedly connected with the end of the valve rod, the valve rod penetrates through the sealing cover, and the valve clack body is installed in the installation circulation hole. And a wear-resistant bushing is fixedly sleeved outside the valve clack body. The flow guide device has the advantages of stable structure and good flow guide effect.

This utility model discloses a cylinder head intake manifold, an engine, and a vehicle, relating to the field of engine technology. The cylinder head intake manifold is located inside the cylinder head of the engine and is used to connect to the engine cylinders. The cylinder head intake manifold includes two independently configured intake passages. Each intake passage has a valve guide mounting hole corresponding to it. Each valve guide mounting hole extends from the top of the cylinder head through the end of the corresponding intake passage and connects to the corresponding cylinder. An intake valve guide for installing a valve is fixedly connected to the upper part of each valve guide mounting hole. The end of each intake valve guide does not protrude into the corresponding intake passage. The centerline of each valve guide mounting hole is inclined at 1.5° towards the inlet side of the intake passage. This utility model improves the structure of the cylinder head intake manifold, preventing the end of the intake valve guide from protruding into the intake passage and solving the problem in the prior art where the end of the engine intake valve guide protruding into the intake passage disrupts the intake airflow.

The utility model discloses an ultra-large current rectifying device, which belongs to the technical field of power electronics and comprises a plurality of rectifier bridge arms and water-cooled busbars, the rectifier bridge arms and the water-cooled busbars are mounted on an inner frame of a rectifier cabinet, each rectifier bridge arm comprises a diode and a press-fitting structure, the diameter of a tube core of each diode is four inches, and the diameter of the press-fitting structure is four inches. The direct-current wire outlet ends of each rectifier bridge arm are symmetrically arranged at the upper end and the lower end of the rectifier bridge arm, and the current path lengths of the parallel branches are equal. According to the utility model, the current sharing capability, the heat dissipation efficiency and the long-term operation stability of the rectifying device are improved.