3results about How to "Reduce heat rate" patented technology

The invention provides a polishing solution and a surface post-treatment method of a semiconductor structural member. The polishing solution is prepared from the following raw materials in percentage by volume: 1-15 parts of diamond micro powder, 30-50 parts of animal fat, 0.5-1 part of potassium hydroxide, 0.5-3.5 parts of polyethylene glycol and 50-70 parts of water. The surface post-processing method comprises the following steps that a profiling tool groove is customized according to the size of a semiconductor structural part to be processed, and the profiling tool groove is installed on a carrying table; a semiconductor structural part to be machined is adsorbed and placed on the profiling tool groove, and then polishing liquid is added into the profiling tool groove; and a polishing head is installed, and the semiconductor structural part to be machined is automatically polished. In the grinding process, the efficiency is considered while the grinding head and the to-be-machined semiconductor structural part (workpiece) are lubricated, the heating probability of the contact face between the grinding head and the workpiece is reduced to the minimum under the action of the grinding liquid, meanwhile, the service life of the grinding water solution is prolonged, and the problem of wastewater pollution discharge is completely eradicated.

The utility model discloses a kind of multi-grade adjustment rotary switches, including base, shell cover, rotating handle and contact assembly, rotating handle rotationally arranged between base and shell cover, and drive rod extending along its radial direction is provided;Contact assembly includes the multiple elastic structure's moving contact bridge of the shaft center of rotating handle as center annularly arranged in installation cavity, and multiple static contact pieces are arranged in base and respectively opposite multiple moving contact bridges, multiple moving contact bridges are connected and respectively located on the movement path of drive rod, drive rod respectively drives multiple moving contact bridges and multiple static contact pieces contact in rotating handle rotating process, by the mechanism of the wheel contact formed by drive rod and multiple moving contact bridges, operation pressure is significantly dispersed, avoid single moving contact bridge sustained stress, greatly reduce the mechanical load and fatigue degree of moving contact bridge, reduce the probability of heating, reduce wear and risk of fusion welding, extend mechanical service life.

The utility model discloses a steam turbine high pressure cylinder rear shaft seal body and contain the shaft seal body's axle end seal structure, wherein, steam turbine high pressure cylinder rear shaft seal body includes the shaft seal main part, the annular seal key of section is L type, steam turbine high pressure cylinder rear axle end seal structure includes end take steam seal body, and rear shaft seal body, and the inner wall of end take steam seal body, and every circle steam seal block installation groove all have inserted steam seal block, form SSR chamber between second compartment and steam cylinder body, and form CF chamber between end take steam seal body, shaft seal main part, rotor axle and steam cylinder body. Advantage: the utility model sets up two independent chambers of SSR chamber and CF chamber, effectively reduces the pressure that end take steam seal body suffered, and steam leakage amount is reduced greatly, breaks through the steam leakage bottleneck of traditional single chamber design, and L type seal's metal face contact is matched with steam cylinder body seal groove, can adapt to steam cylinder body thermal deformation, maintains the stability of sealed clearance, avoids the clearance increase due to deformation.