1055results about How to "Guaranteed parallelism" patented technology

The invention relates to a railless sliding door. The door comprises a door body, a hollow bottom beam and a support roller component, wherein the support roller component comprises a bracket and an upper roller and a lower roller which are arranged on the bracket in a rotating mode; the upper roller and the lower roller are accommodated in the bottom beam; an upper working surface and a lower working surface are arranged in the bottom beam; the outer circumferential surface of the upper roller is in rolling friction contact with the upper working surface; the outer circumferential surface of the lower roller is in rolling friction contact with the lower working surface; the upper working surface comprises an upper horizontal surface positioned on the middle part, an upper left inclined surface positioned at the left end and an upper right inclined surface positioned at the right end; the lower working surface comprises a lower horizontal surface positioned on the middle part, a lower left inclined surface positioned at the left end and a lower right inclined surface positioned at the right end; the upper left inclined surface and the lower right inclined surface are gradually inclined leftwards from top to bottom; and the upper right inclined surface and the lower left inclined surface are gradually inclined rightwards from top to bottom. The parallelism of the upper working surface and the lower working surface of the railless sliding door can be ensured, and the stable operation of the door body is ensured.

The invention relates to the technical field of equipment calibration and discloses a sliding device and car calibration equipment. The sliding device comprises a guide rail, a plate body, a first sliding part and a second sliding part, wherein the guide rail comprises a first surface and a second surface which are perpendicular to each other, the first surface is provided with a first sliding groove, the second surface is provided with a second sliding groove, and the first sliding groove is parallel to the second sliding groove; and the first sliding part and the second sliding part are installed on the plate body, the first sliding part is movably installed in the first sliding groove, and the second sliding part is movably installed in the second sliding groove, so that the plate bodycan slide along the guide rail. By means of the technical scheme, the depth of parallelism of the plate body and the guide rail can be guaranteed, and thus the sliding device still can smoothly slideeven if the device bears large loads.

The invention discloses a dynamic verification and soft handover method for the online state entering of a power grid model, which belongs to the technical field of power grid model management of a power system. The method is characterized in that: the updated data of the power grid model in a scheduling system may not directly enter an online state in an operation system, and can be downloaded into a real-time database of the operation system only after static model verification and dynamic model verification; when the verified model enters the online state, only incremental model data is downloaded by adopting a real-time database row-level dynamic downloading technology, thereby realizing the seamless soft handover of the power grid model; and a model returning mechanism is provided, and the by-the-user verification and enabling of the model is supported, so the parallelism of operations of a plurality of users is ensured, and the consistency of the data of the model is also ensured. By the method provided by the invention, the accuracy of the model can be maximally ensured, the model is ensured not to influence the real-time operation system in the online state entering process to realize disturbance-free online state entering, and the operation reliability and continuity of an online system are ensured.