30results about How to "Improve the ability to resist instability" patented technology

The invention provides a crane and a super hoisting device thereof. The super hoisting device comprises a base, a guide part, an oil cylinder, masts and a connecting rod, wherein the base is connected with a crane arm of the crane; one end of the guide part is connected with the base, and the guide part comprises an accommodating cavity and guide grooves arranged at two sides of the accommodatingcavity; the oil cylinder is arranged in the accommodating cavity, and a first end of the oil cylinder is connected with the base; first ends of the masts are pivotably connected with the base; and a first end of the connecting rod is pivotably connected with the masts, and a second end of the connecting rod is pivotably connected with a second end of the oil cylinder through the guide grooves. According to the invention, the adjustment for the opening angle of the masts can be realized through the guide part and the oil cylinder arranged in the accommodating cavity of the guide part, thus theinstability-resisting capability of the crane arm is improved.

The invention provides a diaphragm opening stiffened bearing cylinder, which comprises a cylinder body and an end frame. The cylinder comprises a lattice rib and an open skin; The end frame comprisesan upper end frame part and a lower end frame part; A lattice rib is arrange on that inner side of the open skin; An upper end frame part is arrange on that top of the cylinder body; The lower end frame part is arranged at the bottom of the barrel. A circular through hole is arranged in the area corresponding to the rhombus area of the open skin, the skin material without radial support area is removed, and a part of the skin is reserved for lifting the tangential bending rigidity of the mesh rib, and the radial rigidity of the mesh rib stiffened bearing cylinder with the mesh rib with a stripsection is improved. The invention can greatly improve the anti-destabilization ability of the diaphragm opening stiffened bearing cylinder, and has strong universality.

The invention discloses a novel sealing ball valve with corrugated pipes. A valve seat assembly A and a valve seat assembly B are arranged on the two axial sides of a valve body respectively and respectively comprise a valve seat body, each valve seat body is provided with a sealing ring forming a sealing pair with a ball body, two corrugated pipes, namely the corrugated pipe I and the corrugated pipe II are installed on the outer ring of each valve seat body in a sectional mode and a sleeving mode and are welded to the two sides of a holder respectively, the other end of each corrugated pipe I is welded to the step surface on the outer ring of the corresponding valve seat body, the other end of each corrugated pipe II is welded to a valve seat check ring, the inner diameters of the corrugated pipe I and the corrugated pipe II of the valve seat assembly A are greater than the inner diameter of the sealing ring of the valve seat assembly A, the inner diameter of the corrugated pipe I of the valve seat assembly B is smaller than the inner diameter of the sealing ring of the valve seat assembly B, and the inner diameter of the corrugated pipe II of the valve seat assembly B is greater than the inner diameter of the sealing ring of the valve seat assembly B. The novel sealing ball valve has the beneficial effect of being applicable to severe working conditions, and valve seats on one side or both sides can realize the bidirectional sealing function.

The invention provides a bellow-type mixed medium vibration isolating and absorbing unit comprising a bellow. Both ends of the bellow are fixedly connected to an upper end plate and a lower end plate to form a bellow container; the bellow container is arranged in a pilot sleeve; the bottom of the bellow container is fixedly connected with the pilot sleeve; a gap is reserved between the side wall of the bellow and the side wall of the pilot sleeve; the bellow container is provided with an opening; a liquid-solid mixed medium which consists of elastic unit bodies and liquid is filled in the bellow container; the top of the pilot sleeve is fixedly connected with a limit disc for preventing the upper end plate from slipping; an upper connecting rod is connected with the upper end plate after passing through the limit disc; and a lower connecting rod is connected with the bottom of the pilot sleeve. By the scheme of the invention, the leakage problem of liquid and gas is thoroughly avoided. The mixed medium vibration isolating and absorbing unit has the advantages that the carrying capacity is high, the natural frequency is low, the structure is simple, the use and the maintenance are convenient and the vibration isolating and absorbing performance can be flexibly regulated by increasing and decreasing the number of the elastic unit bodies.

The invention relates to a method and a tool for verifying the forming quality of the glued surface of a hyperboloid variable-thickness aluminum honeycomb. Lay a lower woven cloth on the outer contour surface of the board-core verification membrane, and lay an upper woven cloth on the trailing edge strip, the first rib, the second rib and the gluing area between the beam and the upper skin, along the outer contour of the upper woven cloth Lay the upper plate-core verification film on the surface, lay a skin on the upper plate-core verification film, vacuum-package the aluminum honeycomb structure as a whole and put it into an autoclave. After a period of high temperature and pressure, open the autoclave. Take out the honeycomb structure, disassemble the upper plate-core verification film and the lower plate-core verification film; observe the compression marks on the upper plate-core verification film and the lower plate-core verification film The degree of depth is used to verify the forming quality of the bonding surface of the aluminum honeycomb, to prevent the aluminum honeycomb from slipping and damaging the skin, and to improve the matching accuracy and the comprehensiveness of the calibration.

The invention provides a transmission line urgent repair tower body which is formed by connecting modularized tower body sections end to end. Each tower body section is formed by splicing corner posts. The transmission line urgent repair tower body is characterized in that each corner post comprises two side boards, wherein an included angle is formed by the two side boards with a post body serving as an axis, bolt holes perpendicular to the post body are formed in the edge of one side board at intervals, and the bolt holes are used for connection between the corner posts. Compared with the prior art, the transmission line urgent repair tower body has the advantages that light weight and modularization are guaranteed, meanwhile the geometric dimension of an urgent repair tower is remarkably increased, the carrying capacity of the urgent repair tower is remarkably improved, the application range is obviously increased, and an effective way is provided for urgent repair of large-load and large-size structures with ultrahigh voltage and the like.

The invention discloses a non-Newtonian fluid impregnated grid reinforced hydrogen storage pressure vessel structure and technology. It includes fiber-reinforced resin-based composite materials that are prestressed and wound on the inner liner of the gas cylinder, the open end of the metal gas cylinder and the outer surface of the tail end, the reinforcement layer of the grid structure, the fiber protection layer and the anti-corrosion protection at the two ends of the head. The entire structure of the gas cylinder container is reinforced with a grid structure reinforcement layer, and the fibers used in the formation of the grid structure reinforcement layer are impregnated with non-Newtonian fluid, dried and then impregnated and wound; firstly, the casting method is used The soft grid structure molds for the cylinder body and the two ends of the head are molded separately, and then bonded to the outer surface of the gas cylinder after winding the fiber reinforced resin-based composite material by joint bonding, and then the grid structure reinforcement layer is formed. The hydrogen storage pressure vessel prepared by the invention has the characteristics of high rigidity, impact resistance, light weight and low cost.

The invention discloses an inner truss-type concrete-filled steel tube L-shaped column and a construction method thereof, wherein the inner-truss-type steel tube concrete L-shaped column comprises outsourcing steel pipes, inner filling concrete and an inner truss; the inner truss comprises T-shaped steel, The inner truss subunit welded by T-shaped steel, and the slivers of the T-shaped steel web in the T-shaped steel web and the inner truss subunit overlapped and welded along the T-shaped steel longitudinally; the T-shaped steel and the inner truss The truss sub-units are located at the corners of the quadrilateral, and the cross-section of the outsourcing steel pipe is Γ-shaped or Π-shaped, and is welded and fixed with the flange plate of the T-shaped steel. In the present invention, the inner truss is tied at the corner of the special-shaped steel pipe, thereby reducing the effective width of the steel plate, providing a fulcrum for the out-of-plane deformation of the steel plate, improving the anti-instability ability of the steel plate and improving the hoop effect of the column, so that the steel pipe The bearing capacity of concrete special-shaped columns is significantly improved.

The invention provides a device with a movable side pressure block based on rubber bladder forming and an application method thereof. The device with the movable side pressure block for a panel veneerand metal plate forming part comprises a base, a mold, a cover plate and a side pressure block. The mold is arranged on the base, the effective mold surface of the mold is consistent to the inner surface of the part, and the cover plate is arranged on the mold to cover the mold so as to clamp a panel veneer; the side pressure block comprises a side pressure block body, a supporting part and a moving part. The upper end surface of the side pressure block is used for overlapping the panel veneer, the supporting part is connected to the side pressure block, the effective molded surface of the supporting part inclines downward to the direction of a bottom plate, the shape of the effective molded surface is matched with the shape of a panel veneer boundary area, and the moving part is connected to the lower end surface of the side pressure block. In a forming process, the side pressure block moves to a direction, far away from the mold, and the panel veneer boundary area is easy to enter into a deformation state as the side pressure block moves, so that the panel veneer is easier to enter into a plastic deformation state, film pasting is facilitated, wrinkling is reduced, and the panelveneer which is formed is pasted fully by a film.

A large-angle flexible laminated single-tooth or dual-tooth shaft coupler is composed of internal central hole for shaft, screw holes, external arcs, and femal arcs for single-tooth one or the male arcs and female arcs for dual-tooth one. Its advantages are large compensating angle, high stability and long service life.

The invention provides a crane and a super hoisting device thereof. The super hoisting device comprises a base, a guide part, an oil cylinder, masts and a connecting rod, wherein the base is connected with a crane arm of the crane; one end of the guide part is connected with the base, and the guide part comprises an accommodating cavity and guide grooves arranged at two sides of the accommodatingcavity; the oil cylinder is arranged in the accommodating cavity, and a first end of the oil cylinder is connected with the base; first ends of the masts are pivotably connected with the base; and a first end of the connecting rod is pivotably connected with the masts, and a second end of the connecting rod is pivotably connected with a second end of the oil cylinder through the guide grooves. According to the invention, the adjustment for the opening angle of the masts can be realized through the guide part and the oil cylinder arranged in the accommodating cavity of the guide part, thus theinstability-resisting capability of the crane arm is improved.

The invention discloses a hydro-mechanical deep drawing forming method capable of improving surface precision of a large-scale thin-wall curved-surface part, and relates to hydro-mechanical deep drawing forming methods. The problems that the curved-surface part is prone to be locally wrinkled and the surface precision is affected in the deep drawing process are solved. Concentric circles with certain distances are carved in the upper surface of an auxiliary forming sheet, the auxiliary forming sheet and a target forming sheet are stacked on a female die, and deep drawing forming is carried out on the auxiliary forming sheet and the target forming sheet. A gap generated by resilience of the auxiliary forming sheet and resilience of the target forming sheet is utilized for separating a deep drawing piece. The diameters and the thicknesses of the concentric circles of the deep drawing piece of the auxiliary forming sheet are measured. Normal inside offsetting is carried out on a molded surface generatrix of an initial deep drawing male die at the corresponding position. Fitting is carried out on an offset point, and the surface generatrix considering deformation and thinning of the auxiliary forming sheet can be obtained. According to the fitted surface generatrix, the initial deep drawing male die is finished, and an ideal deep drawing male die surface is obtained. Deep drawing forming and separation of the auxiliary forming sheet and the target forming sheet are carried out again, and the large-scale thin-wall curved-surface part with improved surface precision can be obtained.

A large-angle flexible laminated single-tooth or dual-tooth shaft coupler is composed of internal central hole for shaft, screw holes, external arcs, and femal arcs for single-tooth one or the male arcs and female arcs for dual-tooth one. Its advantages are large compensating angle, high stability and long service life.

The invention discloses a vibration active control type axial plunger pump with a magnetic bearing, which comprises a casing, a stepped drive shaft, a swash plate, a plunger movement assembly, a cylinder body, a magnetically controlled outer ring of a radial cylinder body, a first 1, 2 Radial permanent magnetic bearings, axial positioning magnetic control bearings. The magnetically controlled outer ring of the radial cylinder body collects vibration signals in real time through a displacement sensor, and adjusts the magnetically controlled outer ring of the radial cylinder body according to the magnitude of the vibration. The first and second radial permanent magnetic bearings realize the levitation state of the stepped drive shaft through the principle of magnetic repulsion. The axial positioning magnetic control bearing regulates the electromagnetic force by controlling the magnitude of the current to ensure the axial positioning of the drive shaft. The invention proposes an active vibration control type axial piston pump with magnetic bearing and its control method, while realizing the suspension of the drive shaft, it can monitor and control the vibration of the cylinder body in real time, and reduce the vibration of the bearing and the drive shaft. The friction between them improves the dynamic stability of the cylinder block and improves the stability and reliability of the axial piston pump.