32results about How to "Avoid compression set" patented technology

A claw teeth type electric rotary machine comprises a stator including an annular core with claws formed from a powder core and an annular coil installed inside the annular core, and a rotor rotatably positioned inside the stator. An inner edge of the annular core is provided with plural claw poles which are protruded at a predetermined interval in a circumferential direction and extended in an axial direction of the annular core so as to alternately meshes with each other. The stator comprises the annular core with claws, the annular coil, and a molded nonmagnetic potting material filled between the annular core with claws and annular coil, so that the annular core with claws and annular coil are integrated with the molded potting non-magnetic material.

The invention relates to a method for preventing a vertical shaft wellhole from being damaged by adopting a ground water injection water level stabilization method, comprising the following concrete steps: 1) analyzing the alluvium structure and water regimen, and selecting a loose aquifer of which the water level continuous descends within over three years from the alluvium as a water injection position; 2) constructing a water injection hole around the wellhole with the shape consistent with that of a long-term hydrological observation well; 3) injecting water into the water injection position by tap water or a water pump through a water injection hole; and 4) monitoring the water injection effect in the water injection process, wherein the monitoring contents comprise aquifer water level monitoring and well wall variation monitoring, and the water injection rate is adjusted based on the monitored water injection effect. The method can ensure the water levels of the wellhole and theaquifer nearby to be increased and relatively steady, reduce compression deformation and additional pressure strain on the well wall caused by loosened soil layers around the wellhole due to drop of the water level, thus preventing the well wall from being damaged. Researching from the perspective of hydrology-geological conditions of mines, in the invention, a method for fundamentally solving the problem of preventing the wellhole from being damaged is searched out based on the well wall fracture mechanism, and has obvious prevention effect, is convenient to construction, and is safe and economic.

The invention discloses a straight-column type lattice-enhanced mixed underwater sound absorption structure. The straight-column type lattice-enhanced mixed underwater sound absorption structure comprises cubic cells; a cavity and a local resonance body are arranged in each cubic cell; the cavity and the local resonance body are located in the center of each cubic cell in the horizontal direction;the local resonance body is close to the top of each cubic cell; the cavity is located at the bottom of each cubic cell of a damping layer in the vertical direction; and the cubic cells are arrayed to form the straight-column type lattice-enhanced mixed underwater sound absorption structure. The underwater sound absorption structure disclosed by the invention has excellent sound absorption performance and good water pressure resistance, and meanwhile, the lightweight design of the underwater sound absorption structure is realized; and the underwater sound absorption structure is a multifunctional integrated structure with the functions of bearing, sound absorption, sound insulation and light weight.

The invention discloses a fixture for milling a spline shaft. The fixture comprises a front tip and a rear tip, wherein the front tip is abutted against the front end of the spline shaft, the rear tip is abutted against the rear end of the spline shaft, and the outer wall of the rear tip is provided with a sliding groove; the fixture also comprises a compressing sleeve and a threaded sleeve, wherein the compressing sleeve is arranged on the outer wall of the rear tip in a sleeving manner and connected to the rear top by a flat key, the flat key is positioned in the sliding groove, the front end of the compressing sleeve is abutted against the rear end of the spline shaft, the threaded sleeve is arranged on the outer wall of the rear tip in a sleeving manner and in threaded connection with the rear tip, the threaded sleeve is positioned behind the compressing sleeve, and a compressed spring is also arranged between the threaded sleeve and the compressing sleeve and abutted against both the threaded sleeve and the compressing sleeve. The invention, overcoming the technical defect that the existing fixture for milling the spline shaft is low in machining efficiency and precision, provides the fixture for milling the spline shaft, which is high in machining efficiency and precision.

A shock absorbing apparatus includes a flexible membrane defining an accumulator cavity, and a compression assembly defining a compression cavity. The compression assembly is disposed within the flexible membrane such that viscous fluid contained within the cavities may be exchanged therebetween by a damping orifice, fluid conduit and or valve mechanism. The accumulator cavity deforms in response to the application of a transmitted impact load, and is capable of storing and releasing potential energy in response to the application and cessation of the transmitted impact load.

The invention discloses a pyramid lattice reinforced cavity type underwater sound absorption structure which comprises cells.A pyramid lattice structure is arranged in each cell; a cavity is formed inthe pyramid lattice structure; and a plurality of cell arrays are arranged to form the pyramid lattice reinforced cavity type underwater sound absorption structure. The pyramid lattice reinforced cavity type underwater sound absorption structureis excellent in sound absorption performance and good in water pressure resistance, the lightweight design of the underwater sound absorption structure isrealized meanwhile, and thepyramid lattice reinforced cavity type underwater sound absorption structure is a kind of multifunctional integrated structure with load bearing-sound absorption-lightweight.

The invention relates to the technical field of tire production equipment, in particular to a tire rubber sheet winding device and a using method thereof. The tire rubber sheet winding device comprises a winding roller connected with a first servo motor, a rubber sheet fixing assembly arranged above the winding roller, an auxiliary roller assembly and a winding roller, wherein the auxiliary roller assembly and the winding roller are arranged at the two sides of the winding roller respectively; a cloth liner is wound around the winding roller, and a rubber sheet is conveyed to the highest point of the winding roller through the auxiliary roller assembly; the rubber sheet fixing assembly comprises a lifting mechanism, the lifting mechanism is connected with a rubber belt fixing mechanism, and a rubber belt with the bonding face facing the winding roller is arranged below the rubber belt fixing mechanism; and one end of the auxiliary roller assembly is in butt joint with the rubber sheet conveying mechanism, and the other end of the auxiliary roller assembly can rotate to be close to or away from the highest point of the winding roller. According to the tire rubber sheet winding device, automatic winding operation is achieved, and the winding quality and the winding stability are improved.

The invention provides a glued laminated timber side splicing solid wood floor, and relates to the technical field of floors. The glued laminated timber side splicing solid wood floor comprises a surface layer, a substrate layer and a bottom layer from the top to the bottom in sequence; and the surface layer and the bottom layer are separately provided with mortises, the substrate layer comprisesa glued laminated timber board and side splicing wood strips arranged on two sides of the glued laminated timber board and used for clamping the glued laminated timber board, and each side splicing wood strip is provided with tenons cooperating with corresponding mortises. According to the solid wood floor provided by the invention, the glued laminated timber board is arranged between the bottom layer and a surface layer bottom plate, so that strength of the floor surface can be ensured, and the wear resistance and strength of the floor surface provided by the invention are higher than those of a floor surface of a glued laminated timber board in the prior art; at the same time, two sides of the glued laminated timber board are provided with the side splicing wood strips, the side splicingwood strips can play a supporting role, so that compression deformation of the glued laminated timber board can be prevented; and the structures of the mortises and the tenons are arranged, so that relative sliding among the layers can be avoided, deformation of the floor can be prevented, and the floor has strong deformation resistance and a stable structure.

The invention discloses hollow glass externally inlaid with thermal insulation material section. A connecting groove is formed between adjacent glass of the hollow glass and a sealant, a connecting tenon is manufactured in the middle of the external thermal insulation material section, the connecting tenon in the middle of the external thermal insulation material section is inserted into the connecting groove of the hollow glass, and the external thermal insulation material section and the hollow glass are combined together.