43results about How to "Simple and economical to operate" patented technology

The invention relates to the field of composite electroplating technology, and particularly relates to a preparation method for a nano-composite high-tin copper alloy electroplating material. The preparation method comprises the steps of adding a certain amount of Al2O3 nano powder (with average particle size of less than 100nm) into pyrophosphate electroplating copper-tin alloy plating solution, stirring bath solution by a stirrer in the preparation process, fully suspending in the plating solution to avoid the clustering of the nano powder, reducing metal ions by utilizing the electro-deposition principle, embedding nano alumina into a plating layer, to reduce holes and cracks on the surface of the plating layer. The surface of the prepared coating is compact, and the microhardness distribution is relatively even.

The invention discloses a test device for simulating the tunnel excavation process. The test device comprises a test box. A dial indicator rack is suspended on the top of the test box. An embedded body is embedded in the bottom of the test box. The test box is filled with a soil mass simulation material. The embedded body comprises a first tunnel excavation test body, a middle partition test body and a second tunnel excavation test body. The first tunnel excavation test body and the second tunnel excavation test body are of the same structure. The first tunnel excavation test body sequentially comprises a primary support simulation layer, a secondary lining simulation layer and a mountain simulation piece from outside to inside. The mountain simulation piece comprises a plurality of plates which are arranged in parallel and detachably connected. By means of the test device, ground surface deformation data can be collected, stress data of a middle partition, a primary support and a secondary lining is collected at the same time, the process of simulating mountain excavation is changed into the process of taking out the simulation piece in a layered mode piece by piece through the platy layered mountain simulation piece, detachment is convenient, and the contour left after detachment is smoother.

A filter device purifies fluids, especially fuels contaminated with organic substances. Hydroxyl radicals are formed from water molecules contained in the fluids by a separating device (10, 14, 22). The hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible and convert them into compounds such as CO2.

The invention relates to a method for puncturing an iron core by a motor wire-insertion preventing winding, which is technically characterized in that: tips around the opening of wire-insertion grooves at two end faces of the iron core are firstly shaped into rounded corners R and an insulating end plate is then bonded when stators and rotors and magnetic pole iron core of the motor are manufactured; and the winding is led out of the opening of the end plate of the iron core with a particular linear section away from the end plate when the wire insertion for stator assembly and magnetic pole assembly is implemented so as to lower the possibility of causing the opening of the insulating end plate to deformation; the method according to the invention can effectively avoid the insulating damage of the winding after the wire insertion of the motor winding and guarantee the processing quality and the reliability of stator, rotor assemblies of the motor. Such technique is simple and economical in operation, easy for popularization and application, capable of bringing a great many economic and social benefits and suitable for the manufacturing of insertion winding assemblies, such as rotor assembly and stator assembly of the motor with the insulating end plate, etc.