12 results about "Elliptical cylinder" patented technology

This invention discloses an ellipticity standard component and measurement method for measuring the quality of duct bending deformation. The standard component includes several grooves cut from top to bottom on the surface of a cylindrical body. The cross-sections at the groove locations are elliptical, and the ellipticity of each elliptical cross-section is unequal. Each elliptical cross-section and the groove wall along the central axis constitute several elliptical cylinder standard components. A coordinate measuring machine (CMM) is used to calibrate the standard component: First, coordinate points are collected on the outer cylindrical surface of the standard component, and the central axis is fitted to obtain it. Then, coordinate points are collected on the elliptical cylinder surface of the standard component and projected onto a plane with the central axis as the normal vector, and the geometric parameters of the elliptical cylinder are fitted to obtain it. Finally, the ellipticity corresponding to each elliptical cylinder is calculated, completing the fabrication of the ellipticity standard component. This invention establishes a standard for the detection and evaluation of ellipticity after duct bending deformation and proposes a method for measuring ellipticity using a coordinate measuring machine, which has good versatility and high accuracy.

The present application relates to a kind of easy to dismantle buckle, including buckle body, elliptic cylinder is arranged above the bottom surface of buckle body, mounting hole is arranged in the bottom surface of buckle body and goes into the lower end of elliptic cylinder, the upper end of elliptic cylinder is not connected with buckle body, and recessed hole is arranged on the upper end surface of elliptic cylinder, and opposite clamping teeth are arranged on the side wall of recessed hole;Through hole is arranged at the corresponding place of buckle body and recessed hole.This technical solution realizes the fixation of four-way pipeline by four groups of opening and closing devices, and the disassembly between each pipeline is not affected by each other, can be independently operated, and the convenience and versatility are better.The present application realizes the fixation of four pipelines in limited space and designs the locking mechanism that is easy to disassemble, realizes the maximization of function and space utilization.The present application has mounting hole, sets up damping pad inside, and sets up shock pad outside, effectively improves the reliability and quietness after fixing.

The utility model relates to the technical field of tubular aerators, in particular to a tubular aerator membrane which comprises a membrane arranged on a pipeline aeration opening, the membrane comprises an inner layer, a bearing layer, an outer layer and a protective layer which are sequentially arranged from inside to outside, the membrane is of a hollow structure, and the front portion and the rear portion of the membrane are of an oval cylinder structure with openings. The opposite edges of the two sides of the membrane are each of a U-shaped structure. And the mounting and dismounting mechanism is fixedly arranged at the end part of the pipeline aeration opening and is detachably assembled with the membrane. Through the supporting function of the inner layer, the strength support of the bearing layer, the wear resistance of the outer layer and the bacteriostatic protection function of the protective layer, the effectiveness of the membrane in various application scenes is ensured, and the functions of all the layers supplement each other, so that the membrane can show excellent performance in actual use; and the membrane at the aeration port of the pipeline can be conveniently mounted and dismounted, and can be replaced or cleaned at any time, so that the service life of the membrane can be prolonged, and the maintenance is simple.

The inner pipe arm lifting device comprises a fixing support and a driving mechanism fixedly connected with the interior of the fixing support, the upper end of the driving mechanism is fixedly connected with a running mechanism, and a self-adaptive mechanism is arranged on the outer side of the upper end of the running mechanism. A lifting platform is fixedly mounted at the upper end of the running mechanism, an elliptical cylinder and a cylinder are arranged on the upper side of the fixed support, and the cylinder is arranged in the elliptical cylinder in a sleeving manner; by arranging the stepping motor, accurate position control can be realized by utilizing the open-loop control characteristic of the stepping motor, the high transmission precision of the ball screw and the displacement encoder, so that high-precision positioning is realized, and the internal space of the circular tube is fully utilized through direct contact between the guide ball on the disc and the inner wall of the circular tube; extra external fixed guide rails are not needed, so that the overall structure is very compact, and the effects of compact structure and high space utilization rate are achieved.

The application discloses a local elliptic cylinder magnet magnetic field calculation method and system based on an equivalent magnetic charge method, establishes a local elliptic cylinder magnet magnetic field mathematical model, sets parameters of the local elliptic cylinder magnet, brings the parameters of the local elliptic cylinder magnet into the local elliptic cylinder magnet magnetic field mathematical model, solves the model, and obtains the magnetic field of the local elliptic cylinder magnet. The application can accurately and quickly calculate the space magnetic field of the local elliptic cylinder magnet magnetized in any direction in the xoy plane, is helpful for subsequent accurate solution of the magnetic field gradient, control of the space magnetic force, and analysis of the dynamic movement of the magnetic beads.

The invention discloses a circular and elliptic composite configuration double cyclone matched with a cyclone trapped vortex combustion chamber. The circular and elliptic composite configuration double cyclone comprises an inner cylinder, a middle cylinder, an outer cylinder, a venturi tube, N1 first blades and N2 second blades, the inner cylinder is a solid cylinder, the middle cylinder is a hollow cylinder, and the outer fixed cylinder is a hollow elliptic cylinder; the N1 first blades are uniformly arranged between the outer cylinder and the middle cylinder in the circumferential direction, and the N2 second blades are uniformly arranged between the inner cylinder and the middle cylinder in the circumferential direction, so that the inner cylinder, the middle cylinder and the outer cylinder are coaxially arranged from inside to outside; and the upstream of the venturi tube is coaxially and fixedly connected with the downstream of the middle cylinder, and the venturi tube is used for promoting crushing and atomization of fuel oil. According to the invention, gas is swirled through the first-stage circular swirler to generate an on-duty stable backflow area so as to ensure the stability of on-duty flames; meanwhile, through the two-stage oval swirler, high-speed rotating jet flow is generated in a main combustion area of the head of the combustion chamber, oil and gas mixing is promoted, and the structure of the novel trapped vortex combustion chamber is matched with that of the novel trapped vortex combustion chamber on the basis of guaranteeing flame stability.

The application discloses a borehole wall roughness measurement system and method. The method comprises the following steps: creating a general elliptic cylindrical surface fitting equation, and creating a fitting reference surface according to the general elliptic cylindrical surface fitting equation; configuring the fitting reference surface in a borehole wall coordinate system; expanding the borehole wall coordinate system along the fitting reference surface to obtain an expanded plane of the fitting reference surface; obtaining a plurality of axial sampling lines parallel to a borehole axis of the expanded plane; obtaining borehole axial profile lines corresponding to the axial sampling lines; and obtaining axial roughness evaluation parameters of the borehole axial profile lines.

The clamp spring auxiliary installation device comprises a workbench, a clamp spring containing table is arranged on the workbench and installed on a supporting table through a sliding sleeve, a round clamp spring groove is horizontally formed in the upper surface of the end of the clamp spring containing table, and a workpiece hole is formed in the bottom of the clamp spring groove; a through hole is also formed in the supporting table, a vertical groove is formed in the end of the clamping spring containing table, and the vertical groove communicates with the clamping spring groove; a driving assembly is further arranged on the workbench, an inner supporting assembly is arranged on the driving assembly, the inner supporting assembly is arranged at the end, close to the clamping spring groove, of the clamping spring containing table, the inner supporting assembly comprises a vertically-arranged driving plate, and an elliptic cylinder is arranged at the end, close to the vertical groove, of the driving plate; the axis of the elliptic cylinder is parallel to the plane of the driving plate, and a limiting plate is arranged at the top of the elliptic cylinder. The problems that the expansion process of the clamp spring cannot be accurately controlled, the clamp spring is easy to pop out or deform, and the fatigue strength is high are solved.

The application discloses a tunnel excavation face limit support force calculation method based on a whole analysis method, and comprises the following steps: step 1: a limit support force calculation model of an excavation face is proposed based on the whole analysis method; step 2: according to the theoretical model, a calculation formula of the limit support force of a shield excavation face is derived; and step 3: a corresponding loose zone model of a shield tunnel damage is proposed, wherein the model comprises a shallow-buried shield tunnel damage model and a deep-buried shield tunnel damage model. The whole analysis method is applied to the excavation face stability problem, and a calculation model of the excavation face stability is established. According to the tunnel deep and shallow burying, an elliptic cylinder-type general arch model considering the soil arching effect is established. The limit support force obtained by the application presents a consistent development trend with the numerical simulation and the existing theoretical results. In addition, the calculation time of the analytical solution is far less than the calculation time of the numerical simulation, and a new idea is provided for the design of the limit support force of the excavation face.

The invention discloses a supporting device of an elliptic cylinder radar, and relates to the technical field of radar structures. The supporting device comprises a radar body, the radar body sequentially comprises a radar rear boundary, a radar rear end, a radar front end, an antenna part and a radar front boundary from back to front, and the two sides of the radar front end and the two sides of the radar rear end are fixedly provided with a first supporting frame and a second supporting frame through fixing bolts; and two groups of limiting and leveling pieces are arranged between the first supporting frame and the second supporting frame which are arranged on the same side. The radar main body is effectively supported through the first supporting frame and the second supporting frame, the connecting stability of the first supporting frame and the second supporting frame is further improved in cooperation with the limiting leveling piece, the stability requirement of the radar main body in the three-axis six-direction direction can be met, stable supporting guarantee can be provided in the radar main body transferring process, and the stability of the radar main body is improved. And the structure is convenient to adjust, the radar main body can be tested without disassembly, and both the transfer efficiency and the test efficiency are considered.

The invention relates to the technical field of vibration control, and discloses a metal rubber vibration isolator with unequal rigidity in the radial direction and a design method thereof.The metal rubber vibration isolator with the unequal rigidity in the radial direction is formed by using a mandrel as a supporting body and using a metal rubber net backing ring as an elastic bearing element of the vibration isolator. The metal rubber vibration isolator can achieve three-direction vibration reduction in the space in the working process. The core shaft adopts an elliptic cylinder with an elliptic cross section, the inner diameter of the metal rubber net backing ring is equal to the diameter of a short shaft of the elliptic cylinder, the long shaft of the elliptic cylinder is used for prepressing the inner wall of the metal rubber net backing ring in the radial direction, the compression amount of the metal rubber net backing ring in different radial directions is changed, and a structure with unequal radial rigidity is formed; the metal rubber vibration isolator has different rigidities in the radial direction of the mandrel, so that the metal rubber vibration isolator can realize vibration isolation of different frequencies in different radial directions, and the problem of different vibration reduction and isolation frequencies in different radial directions is solved.

The utility model relates to the technical field of blasting equipment provides a kind of energy-gathering explosive tube, comprising: elliptical cylinder pipe body, two energy-gathering grooves are structured on the outer circumferential wall of elliptical cylinder pipe body, energy-gathering groove extends along the length direction of elliptical cylinder pipe body, one of energy-gathering groove is located at the long axis of elliptical cylinder pipe body one end, another energy-gathering groove is located at the long axis of elliptical cylinder pipe body other end.The energy-gathering explosive tube of the utility model, by setting elliptical cylinder pipe body, and setting one energy-gathering groove at the both ends of the long axis of elliptical cylinder pipe body, after inserting elliptical cylinder pipe body in blast hole, only need to aim energy-gathering groove at the direction of rock mass needing to be destroyed, most of the blasting energy can be guided to energy-gathering groove position, so as to make the rock mass of corresponding position crack, realize directional fracture, improve blasting efficiency, improve blasting effect, effectively solve the problem that the blasting energy produced by the blasting device in the prior art is not concentrated, and the blasting effect is poor.