4results about How to "Guaranteed structural accuracy" patented technology

The utility model relates to valve machining technical field, especially a new type valve cover. Including base, annular pipe, reinforcing surface, fixed ring and annular groove, the annular groove sets up in the base body center position, two fixed ring respectively set up on the base body, and two fixed ring respectively are close to base body both ends setting, the annular pipe sets up in the base upward operation surface. Including raw material detection, heating and material preparation, making embryo and forging, intermediate detection, trimming and shaping, cooling and cutting, welding and processing, final detection, cleaning and polishing, equipment maintenance, the utility model has the beneficial effect that: through the close connection of annular pipe and annular groove, the sealing performance of valve cover is promoted, effectively prevents medium leakage, through strict raw material detection and each link quality detection, can effectively improve the quality of valve cover, enhances its sealing property and pressure resistance, reduces the occurrence of product failure and leakage problem.

This invention discloses a microchannel heat exchanger driven by an electrohydrodynamic (EHD) pump, characterized by comprising an EHD pump unit and a microchannel heat exchange unit; the EHD pump unit includes a pair of emitter / receiver electrodes, alternately arranged along the flow direction at the bottom of the microchannel, and several EHD pump units are connected in series to form a multi-stage electrode array; the microchannel heat exchange unit includes a jet port and an array-arranged microchannel; the dielectric liquid generated by the EHD pump is directly sprayed into the microchannel heat exchange region through the jet port; the EHD pump unit and the microchannel heat exchange unit are integrated in the same substrate, so that the electrode arrangement area and the heat exchange channel area form a continuous flow path.

The application relates to a multi-chassis adaptive modular adapter chassis and a use method thereof. Since the number of two longitudinal beams is fixed, and various sizes of cross bars and girder connecting structures are arranged, when different chassis are responded to, only the corresponding size of the cross bar and the girder connecting structure need to be replaced, the integral replacement is not needed, the cross bar and the girder connecting structure are regarded as replaceable modules, the dependence degree of platform superstructure and the chassis is reduced, the independence of the chassis is improved, the design response speed of the multi-chassis demand is improved, meanwhile, the overall structural precision of the device can be better ensured, the adaptive efficiency of the platform superstructure and the chassis is improved, the chassis adaptive cost is reduced, and the problem that the platform superstructure and the chassis cannot be one-to-one matched during product development due to different customer group demands and repeated design is solved.

The utility model provides a bicycle lifting seat tube, including outer tube, inner tube, bush, sealing assembly and buffer ring. Inner tube can move up and down in the outer tube, and bush is equipped between inner and outer tube, and top end has upper abutting part. Sealing assembly is equipped between inner and outer tube, has annular inner ring shoulder, effectively blocks liquid and solid material to enter seat tube inside, keeps clean. Buffer ring is equipped between sealing assembly inner ring shoulder and bush upper abutting part, absorbs impact and vibration in the process of lifting, reduces the wear and tear between inner tube and bush, disperses reaction force, reduces stress concentration, improves durability and impact resistance, and keeps stable cooperation, avoids shaking and abnormal sound, ensures that lifting is smooth and comfortable. The utility model effectively solves the problems, such as seat tube subsidence, shaking, abnormal sound and wear and tear, improves stability and durability, and improves riding experience.