47 results about "Thin walled cylinder" patented technology

The invention discloses a method for calculating stress and deformation of a roller carrier supporting thin-walled cylinder under the action of dead weight, which comprises the following specific steps of: S1, calculating the bending moment and deflection of a cylinder body in the longitudinal direction by adopting an overhanging beam model in the longitudinal direction, and determining the optimal position of the roller carrier in the longitudinal direction according to the maximum bending moment minimization and the maximum deflection minimization of a beam; s2, transversely utilizing symmetry to establish a semicircular curved beam model, and calculating bending moment and displacement in a transverse plane of the cylinder by adopting a Temosinke beam theory; s3, calculating the maximum stress in the cylindrical surface according to the in-surface bending moment, and determining the optimal half wrap angle required by the strength; and S4, calculating the ovality and root-mean-square roundness of the curved beam according to the displacement, and determining the optimal half wrap angle required by deformation. According to the method, the maximum stress and the deformation shape of the thin-walled cylinder are accurately predicted, and the optimal wrap angles of the roller carrier under the strength requirement and the deformation requirement can be determined to be 67.4 degrees and 90 degrees respectively, so that the optimal wrap angle is suggested to be between 67.4 degrees and 90 degrees in engineering.

The invention discloses a rock dynamic pressure-torsion experimental device and method based on a Hopkinson pressure bar, and belongs to the technical field of rock mechanics dynamic testing. The device mainly comprises a split Hopkinson pressure bar system and a spiral conversion mechanism, wherein the spiral conversion mechanism consists of a spiral (4) and a screw sleeve (5) which are meshed with each other; the screw (4) is fixedly connected with the incident rod (2), the screw sleeve (5) is fixedly connected with one end of a cylindrical rock sample (6), and the other end of the sample is fixedly connected with the transmission rod (7). The core is that the lead angle of the screw pair is greater than the equivalent friction angle of the screw pair under the impact load, so that the screw pair is ensured to be non-self-locked; and the sample (6) is of a hollow thin-wall cylinder structure. The method comprises the following steps: driving the spiral (4) to advance by utilizing axial stress waves generated by the split Hopkinson pressure bar, and driving the hollow sample to rotate by the screw sleeve in a forced constraint state, so as to synchronously apply dynamic axial compression and torsional shear combined load.

The present application provides a continuous scanning laser Doppler vibration test method for the outer surface of a thin-walled casing. Firstly, the continuous scanning vibration test is performed on the outer surface of the thin-walled casing, and the vibration time-domain signals of the outer surface of the thin-walled casing are collected. Then, the vibration displacement amplitude of the outer surface of the thin-walled casing is obtained by processing the tested time-domain signals through a band-pass filter and a Hilbert transform. Next, the laser continuous scanning path point coordinate model of the variable cross-section outer surface of the thin-walled casing is established, and the laser continuous scanning path point coordinates of the outer surface of the thin-walled casing at the missing hole are deleted by comparing with the coordinate model of the UG of the thin-walled casing. The vibration displacement amplitude based on the laser continuous scanning path point coordinates is obtained. The continuous scanning modal shape of the planar expansion of the outer surface of the thin-walled casing is obtained. Finally, the three-dimensional continuous scanning modal shape of the outer surface of the thin-walled casing is obtained through a coordinate conversion formula. Compared with the traditional test method for the outer surface of a thin-walled cylinder, the test efficiency is greatly improved, and the range of the test structure is expanded.

The invention discloses a thin-walled cylinder creep buckling experiment device and method under the high-temperature external pressure condition, and belongs to the technical field of structural deformation measurement under the high-temperature environment. The device comprises a heating furnace, a displacement measuring body and an external pressure testing body, the heating furnace is used for providing a stable high-temperature environment for the sample; the external pressure test body is arranged in the heating furnace and comprises an external pressure cylinder body serving as a sample and an internal pressure cylinder body arranged on the outer side of the external pressure cylinder body in a sleeving manner, a pressurizing chamber is formed between the two cylinder bodies, and an external pressure load is applied to the external pressure cylinder body by pressurizing the interior of the pressurizing chamber; the displacement measuring body is connected with the external pressure testing body through a connecting piece and is used for sensing and recording the circumferential deformation displacement of the sample under high-temperature external pressure in real time. According to the invention, the infinitesimal displacement of the sample is amplified through lever-molybdenum wire transmission, so that real-time continuous monitoring of external pressure creep buckling in a high-temperature sealed environment is realized; accurate and stable load is ensured based on the arrangement of the double-layer cylinder and the gas circuit; the whole structure is modularized, convenient to disassemble and assemble and suitable for high-temperature equipment experiments in the fields of nuclear energy, chemical engineering and the like.

The utility model relates to the technical field of ocean engineering discloses an anti-ice device suitable for offshore floating photovoltaic support structure, including steel pipe, and fixed in rigid energy -absorbing buffer layer and the floating combination that can slide along steel pipe of steel pipe, and the floating combination is constituted by wedge-shaped anti-ice block and floater, between rigid energy -absorbing buffer layer and wedge-shaped anti-ice block, buffer rubber pad and giant spring are sequentially connected in series, and are guided through thin -walled cylinder. The utility model solves the problem that the existing device cannot adapt to the tide level and the problem of insufficient buffering. It drives the wedge-shaped anti-ice block to float with the tide level through the floater, and changes the damage mode of ice by using the wedge-shaped structure, at the same time, stably dissipates the impact energy through the multistage buffer system, greatly improves the safety and reliability of photovoltaic support structure in the ice area.

The invention discloses an internal expansion type numerical control lathe fixture for a thin-walled cylinder workpiece. The internal expansion type numerical control lathe fixture comprises a chuck body, a fixture body, a positioning cover, an expansion sleeve, a locking block and a locking wrench, the other end of the chuck body is connected with the clamp body; the positioning cover is connected with the clamp body, and the outer surface of the positioning cover makes contact with the outer surface of a workpiece to achieve workpiece positioning. The expansion sleeve is in conical fit with the clamp body, and the expansion sleeve expands to enable the outer surface of the expansion sleeve to make contact with a workpiece so as to abut against and clamp the workpiece; the locking block is connected with the expansion sleeve, the locking block is in threaded connection with the clamp body, and the expansion sleeve is controlled to be expanded and shrunk through rotation of the locking block; and the locking wrench is connected with the locking block. The expansion sleeve is matched with the conical surface of the clamp body, expansion of the expansion sleeve is controlled through threaded connection of the locking block, the thin-wall cylindrical workpiece is clamped by the expansion sleeve, the deformation of the part is reduced, the form and location tolerance of the part is guaranteed, the problem of machining vibration of the thin-wall workpiece is solved, and the machining efficiency and the machining quality of the part are greatly improved.

The invention discloses a rod force sensor protection structure and an installation method thereof. The rod force sensor protection structure comprises a thin-wall cylindrical structure with a sensitive measurement circuit. The thin-wall cylindrical structure is covered with an outer shell. An elastic locking ring sleeves the thin-wall cylindrical structure and is close to the sensitive measuring circuit, and the elastic locking ring is provided with an opening along the axial direction; the outer shell is provided with an inner conical surface F; the elastic locking ring is provided with an outer conical surface matched with the inner conical surface F of the outer shell and an inner cylindrical surface E matched with the thin-wall cylindrical structure; the outer shell is in threaded connection with a fine thread locking nut, the fine thread locking nut abuts against the elastic locking ring, so that the outer conical surface of the elastic locking ring is matched with the inner conical surface F of the outer shell, the inner cylindrical surface E of the elastic locking ring is matched with the outer cylindrical surface of the thin-wall cylindrical structure, and the protection structure is fixed to the thin-wall cylindrical structure. Reliable protection of the sensitive measurement circuit of the rod force sensor is realized.

The application discloses a calculation method of stress and deformation of a thin-walled cylinder under self-weight of a roller support, and specific steps include the following: S1, a cantilever model is used to calculate the bending moment and deflection of the cylinder in the longitudinal direction, and the optimal position of the roller support in the longitudinal direction is determined according to the maximum bending moment minimization and the maximum deflection minimization; S2, a half-circular curved beam model is established by using symmetry, and the bending moment and displacement of the cylinder in the transverse direction are calculated by using the Timoshenko beam theory; S3, the maximum stress of the cylinder in the transverse direction is calculated according to the bending moment, and the optimal half-enclosure angle required by the strength is determined; and S4, the ellipticity and root mean square roundness of the curved beam are calculated according to the displacement, and the optimal half-enclosure angle required by the deformation is determined. The application can accurately predict the maximum stress and deformation shape of the thin-walled cylinder, and can determine that the optimal enclosure angles of the roller support under the strength requirement and the deformation requirement are 67.4 DEG and 90 DEG respectively, and therefore, the optimal enclosure angle in engineering is recommended to be between 67.4 DEG and 90 DEG.

The invention discloses a thin-walled cylinder part turn-milling combined machining clamp with a zero-point positioning function, which comprises a clamp body used for mounting a cylinder part, an upper connecting disc arranged at the upper end of the clamp body, and a lower connecting disc arranged at the lower end of the clamp body; the zero-point positioning blind rivets are arranged on the upper connecting disc and the lower connecting disc and used for being connected with a machine tool spindle; and the plug pins are arranged on the upper connecting disc and the lower connecting disc and used for transmitting the torque of the main shaft. An end face positioning block is arranged on the clamp body, and a locking mechanism is arranged at the upper end of the end face positioning block. A plurality of auxiliary supporting mechanisms are arranged on the clamp body. The end face positioning block is matched with the locking mechanism capable of adjusting the locking force, and reliable axial clamping of the workpiece is achieved. The auxiliary supporting mechanism achieves radial supporting. The zero-point positioning blind rivet is arranged, the zero-point positioning blind rivet and a machine tool spindle can be rapidly and accurately connected and positioned, the installation and adjustment time of the clamp is shortened, the production efficiency is improved, and the consistency of multiple clamping and the machining precision are guaranteed.

This invention discloses an automatic welding fixture and welding method for thin-walled cylindrical circumferential welds. A drive mechanism rotates a drive disc, and a guide sliding structure causes several tensioning components to radially expand relative to the rotating disc assembly and press against the joint between the upper and lower thin-walled cylinders. Then, a first and a second rotary pressing cylinder press down on the flanges of the upper and lower thin-walled cylinders respectively. Simultaneously, a venting plate is directly integrated onto the outer wall of the arc-shaped outer support of the tensioning components. The venting plate is used to purge the joint between the upper and lower thin-walled cylinders with protective gas. This method offers high processing accuracy, convenient operation, and improves processing efficiency and structural compactness.

The utility model belongs to the technical field of thin-wall cylinder machining, and discloses a thin-wall cylinder machining tool and equipment, the thin-wall cylinder machining tool comprises a first cylinder, a second cylinder and a locking piece, the first cylinder is used for stretching into a cylinder body to be machined from one opening of the cylinder body to be machined, and the peripheral surface of the first cylinder is attached to the inner wall of the cylinder body to be machined; the second cylinder is used for stretching into the cylinder from the other opening of the cylinder to be machined, the peripheral face of the second cylinder is attached to the inner wall of the cylinder to be machined, a first protruding edge is arranged on the periphery of the first cylinder, a second protruding edge is annularly arranged on the periphery of the second cylinder, and the first protruding edge and the second annular protruding edge abut against one end, opposite to the first protruding edge, of the cylinder to be machined. The locking piece can lock the first cylinder and the second cylinder in the axial direction. According to the thin-wall cylinder machining tool, a cylinder to be machined can be supported in the radial direction and the axial direction, radial and axial deformation of the cylinder to be machined during machining is avoided, and the machining precision of the finally-machined thin-wall cylinder meets the use requirement.

The invention discloses a solid engine shell strength evaluation method, and belongs to the technical field of material strength simulation. Comprising the following steps of establishing a two-dimensional finite element model of an engine, calculating stress and strain of the engine through a constitutive equation and a damage failure equation of a shell, testing a temperature monitoring point on the shell, making a pressure intensity time-history curve and a temperature time-history curve, and checking the strength of the shell. A two-dimensional finite element model of the engine is established through finite elements, a combustion regression layer on the inner surface of a propellant serves as a source item, temperature loads and pressure loads are applied, and the combustion working process of the engine is simulated; a constitutive equation and a damage failure equation of the shell are used for calculating plastic stress and strain of the shell, strength simulation is conducted on the shell in the working process of the engine according to an actually-measured pressure intensity curve, the pressure intensity and temperature response characteristics of the engine shell in the high-temperature environment, the normal-temperature environment and the low-temperature environment are obtained, and through finite element analysis and thin-wall cylinder strength checking, the strength of the shell is obtained. And judging whether the shell meets the strength requirement during the working period of the engine.

The invention discloses a method for simultaneously measuring viscosity and density of trace liquid. Liquid circulates in the thin-wall cylinder resonator, the electromagnetic transducer is attached to the thin-wall cylinder resonator, the thin-wall cylinder resonator is excited through a coil to generate ultrasonic guided waves, an attenuation signal is received, a dimensionless time domain attenuation coefficient and resonance frequency of the attenuation signal are extracted, and the resonance frequency of the thin-wall cylinder resonator is calculated. And in combination with the established model of the relationship between the liquid viscosity and density parameters and the time domain attenuation and the resonant frequency, synchronous and simultaneous decoupling of the liquid viscosity and density parameters is realized. The method overcomes the limitation that the viscosity and the density are difficult to measure synchronously, the operation is complicated, the environmental requirement is high, and the guided wave resonance sensor is difficult to distinguish the two parameters, and is rapid, convenient and suitable for online monitoring measurement.

The utility model discloses a universal auxiliary clamp for turning a thin-wall cylindrical workpiece. A pushing body is arranged in a base body; the radial supporting and distance adjusting assemblies are arranged on the base body, the radial supporting and distance adjusting assemblies are in contact fit with the pushing body, and the three sets of radial supporting and distance adjusting assemblies are evenly distributed in the circumferential direction of the base body; the workpiece clamping assemblies are arranged on the radial supporting and distance adjusting assemblies, and each radial supporting and distance adjusting assembly is provided with one workpiece clamping assembly. Every three sets of radial supporting and distance adjusting assemblies form a group, the lengths of the radial supporting rods in the three sets of radial supporting and distance adjusting assemblies in the same group are the same, and the lengths of the radial supporting rods in the radial supporting and distance adjusting assemblies in different groups are different; the pushing body locking and limiting assembly is arranged between the pushing body and the base body. The thin-wall cylindrical workpiece auxiliary clamp can adapt to thin-wall cylindrical workpieces of different sizes and specifications, the number of auxiliary clamps is reduced, the outer circle face and the inner hole face of the workpiece can be machined only through one-time clamping, the machining efficiency is improved, introduction of form and position errors is avoided, and the workpiece machining precision is improved.

This invention provides a testing device and method for thin-walled cylindrical products in the field of rocket tube section testing technology. The device includes a frame, a guide wheel mechanism, a motor-driven wheel mechanism, and an electrical control system. The invention uses four motor-driven wheel mechanisms located at the four corners of the frame. Each wheel has a long groove. The thin-walled cylindrical product to be tested is placed in these grooves. A T-slot is provided on a rectangular hollow steel section. The electrical control system remotely controls the testing device to move along the T-slots to the testing position. Then, the motor is remotely controlled to drive the wheels to rotate, thereby rotating the product axially and aligning the tested portion with the testing instrument. This significantly reduces manual operation and improves testing efficiency and operational safety.

The invention belongs to the field of machining, particularly relates to a cutter structure and a cutter system for turning a cylinder, and aims to solve the problem that the machining quality is poor when an existing cutter structure is used for machining a thin-walled cylinder. The cutter structure for turning the cylinder comprises a cutter sleeve and a cutter handle, wherein the cutter handle is inserted into the cutter sleeve and is detachably connected with the cutter sleeve; the cutter sleeve is installed on a lathe saddle. The blade is installed on the cutter handle. According to the cutter structure for turning the cylinder, the extension length of the cutter handle is adjustable through the inserting connection mode and the detachable connection mode of the cutter handle and the cutter sleeve, so that the cutter handle is matched with the length of the cylinder, an overlong cantilever is avoided during machining, and then the stability during cutting is guaranteed; the plunger pump part replacement frequency increase caused by machining surface roughness increase is avoided, and meanwhile the service life of a cutter is prevented from being shortened. And moreover, the detachable connection can replace the cutter handles with different sizes, so that the cutter handle with a large cross section area is selected as far as possible to improve the rigidity, reduce the vibration and improve the machining quality.

The invention discloses an inner wall circumferential reinforcing structure for a thin-walled cylinder, and belongs to the technical field of cylinder manufacturing. The problems that according to an annular supporting structure in an existing thin-wall cylinder, welding points are concentrated, and the requirement for installation precision is high are solved. The reinforcing ring comprises an inner reinforcing ring body and an outer reinforcing ring body located on the outer side of the inner reinforcing ring body, the inner reinforcing ring body and the outer reinforcing ring body are each of a regular polygon structure and are arranged in a staggered mode in the circumferential direction, all corner points of the inner reinforcing ring body are fixedly connected with the middle sections of all edges of the outer reinforcing ring body correspondingly, and all corner points of the outer reinforcing ring body are fixedly connected with the inner wall of the thin-wall cylinder body. The arch effect and the triangle stability principle are fully utilized, an integral annular reinforcing structure formed by combining N arches and triangles is formed on the inner wall of the thin-wall cylinder, when the thin-wall cylinder bears internal pressure or external pressure, the thin-wall cylinder can be effectively prevented from deforming, and the method is particularly suitable for large-diameter thin-wall cylinders.

The application belongs to the technical field of pressure measurement, and relates to a high-precision high-pressure fiber grating pressure sensor, the main structure of which comprises an outer cylinder sleeved outside a thin-walled cylinder and a pi-phase shift grating arranged on the thin-walled cylinder, the improved sensitive structure thin-walled cylinder is used as a pressure conversion element, the outer cylinder is used as a protection structure, the pi-phase shift grating adopting laser sweep frequency technology and cross-correlation algorithm as an interrogation system is used as a pressure sensing element, the wide measurement range and high sensitivity requirements of deep-sea pressure measurement are met, the structure is more reasonable, has high portability, practicality and flexibility, can be expanded for multi-parameter measurement and multipoint measurement, and is particularly suitable for pressure measurement occasions requiring a large range and high precision, such as seawater depth measurement and oil and gas pipeline measurement, while meeting the wide measurement range and high resolution requirements of deep-sea pressure measurement, the fiber grating pressure sensor is easy to integrate, has strong expandability, is small in size, good in linearity, low in cost and good in stability.

The invention discloses a supercritical CO2 circulating pump driven by a shielding motor. The supercritical CO2 circulating pump comprises a rear cover, a motor shell, a motor stator, a positioning baffle semicircular ring, a double-boss sleeve, a shielding sleeve, a sealing shell, a pump head, a rotor shaft, a motor rotor, a shaft sleeve, an auxiliary impeller, a labyrinth sealing semicircular outer sleeve, a main impeller, a bolt, a sealing ring and the like. The auxiliary impeller is additionally arranged and connected with the cooling heat exchanger through a pipeline, the CO2 temperature of the motor shell is reduced, meanwhile, a labyrinth sealing structure is adopted, mutual diffusion between high-temperature CO2 of a pump head cavity and low-temperature CO2 of the motor shell is reduced, and normal operation of the motor is guaranteed. Besides, the shielding sleeve is a metal corrugated thin-wall cylinder, shielding sleeve damage caused by thermal stress and pressure disturbance can be reduced, meanwhile, a positioning baffle semicircular ring is additionally arranged, the corrugated pipe can be changed in the area not between the motor stator and the motor rotor, it is guaranteed that gaps between the motor stator and the shielding sleeve and between the motor rotor and the shielding sleeve are not changed, and friction damage is prevented.

The present invention discloses a tail gas treatment device for epitaxial equipment, comprising: an air intake interface, an exhaust pipe, a cooling component, a gas-solid separation component, a purge component, and an exhaust interface, wherein the two ends of the exhaust pipe are respectively sealed to connect the air intake interface and the exhaust interface to realize exhaust gas transportation, the cooling component surrounds the outside of the exhaust pipe and is used to realize exhaust cooling in the exhaust pipe, the gas-solid separation component is nested inside the exhaust pipe, and the gas-solid separation component includes a plurality of thin-walled cylinders nested in sequence, the purge component is sealed through the cooling component and communicates with the vent on the inside of the exhaust pipe, and purge gas is provided by the purge component to realize gas-solid separation of the exhaust flowing through the exhaust pipe. The present invention has the advantages of compact structure, simple operation, significant separation effect, and low cost of use, solves the problems of shortened life of vacuum components and high maintenance cost of exhaust caused by process exhaust, and improves the productivity and operational stability of epitaxial equipment.

The invention provides a preparation process of a high-manganese aluminum bronze flange forging for a marine environment. The preparation process comprises the following steps: S1, taking a thin-wall cylindrical high-manganese aluminum bronze casting as a to-be-forged part; s2, the to-be-forged part is placed in a forging die, the outer side wall of a cylinder of the to-be-forged part abuts against the die, and a first-stage forging procedure is carried out till the inner diameter of the to-be-forged part is forged to a first target size; and S3, the to-be-forged part is placed in a forging die, the inner side wall of a cylinder of the to-be-forged part abuts against the die, a second-stage forging procedure is carried out till the outer diameter of the to-be-forged part is forged to a second target size, and the high-manganese aluminum bronze flange forging finished product is manufactured. According to the method, the thin-wall cylindrical casting is subjected to graded forging, so that the density of the forging and the uniformity of a metallographic structure are improved, the mechanical property and the safety performance of a flange product are ensured, and meanwhile, the forging efficiency is also improved.

An automatic conveying device is arranged on the front portion of the thin-wall cylinder seam welding equipment, and an automatic welding machine is arranged on the rear portion of the thin-wall cylinder seam welding equipment. The automatic conveying device is provided with an automatic feeding and discharging mechanism and a welding detection device. A welding station is arranged at the intersection of the automatic conveying device and the automatic welding machine; welding wheel devices are arranged on the two sides of the welding station respectively, and the automatic welding machine is provided with a welding pressurizing device connected with the welding wheel devices, a welding rotation driving device and a welding wheel correcting device matched with welding wheels. The two welding wheel devices are located on the two sides of the welding station. The welding wheel device is provided with a welding wheel capable of freely rotating; the welding wheel correcting device comprises a correcting turning tool, a turning tool rest and a correcting servo motor. The correction servo motor is a torque feedback motor, and the pressurization servo motor and the correction servo motor are connected into the same control system. According to the utility model, through fewer detection elements, the automatic welding and correction operation of equipment can be realized, and the requirement of efficient seam welding operation can be met.

This invention relates to the field of welding equipment technology, and provides a welding device for thin-walled cylindrical parts, solving the technical problems of end-heat deformation and coaxiality during welding of a pair of thin-walled cylindrical parts. The welding device for thin-walled cylindrical parts is characterized by comprising: a welding support device, a welding roller rotating device, and a welding robotic arm; the welding support device is used to internally support the welding ends of two thin-walled cylindrical parts; two welding roller rotating devices are provided, each supporting one thin-walled cylindrical part, and the two welding roller rotating devices are driven synchronously; the welding robotic arm performs the welding operation through an end effector.

The invention relates to a design method for integrally forming a spinning blank of a thin-wall cylindrical part with a conical section joint, which aims at integrally spinning and forming a complex thin-wall cylindrical part with the conical section joint. On the basis of the shearing spinning sine law and the plastic forming isovolumetric deformation principle, full-size chain design and optimization of the integrally-formed thin-walled cylindrical part spinning blank with the conical section connector are completed, and integrated precise spinning forming machining of the thin-walled cylindrical part with the conical section connector and a complex structure can be efficiently and conveniently achieved through the blank. The defects that in the prior art, machining precision is poor, welding defect risks exist, the period is long and cost is high are overcome, and the problems that when the spinning roller rotates, concave-convex edges are generated on a blank, and reverse extrusion is generated are effectively solved. According to the method, the shearing spinning sine law and the metal plastic deformation isovolumetric flow principle are ingeniously applied, so that the conical section of the product can be formed in a spinning mode at a time, and the high precision of the product size and the consistency of the wall thickness and the diameter are perfectly guaranteed.

The invention relates to a force, heat and deformation online measurement test device for cutting machining of thin-walled cylinder parts and a use method, and relates to the technical field of machining, the output end of a machine tool is connected with a cutter through a main shaft, a workpiece is placed on a clamping mechanism to be clamped, and the cutter is driven by the main shaft of the machine tool to rotate for cutting machining; the force measuring device is arranged on the machine tool platform and used for measuring cutting force in the machining process. The line laser device measures machining deformation; the image acquisition device observes the material removal process in the machining process; the moving device comprises a rotary platform, the rotary platform is arranged on the force measuring device and used for bearing a workpiece, and the rotary platform rotates to drive the workpiece to rotate so as to complete feeding movement. The position of the cutter is not changed, the problem that a cutting point continuously changes during machining is solved by rotating the thin-walled cylinder workpiece through the rotary table, the cutting force in a machining area can be measured in the whole process through the device and the method, and obtained data can be directly used without being processed.

A shaping and repairing device suitable for a thin-wall cylinder part on an aviation aircraft is provided with a workpiece clamping mechanism, a shaping and repairing executing mechanism and a rotating power input mechanism. The workpiece clamping mechanism comprises a base support, a fixing sleeve, clamping jaws, positioning sleeves and limiting pins, the fixing sleeve is installed on the base support, the two ends of the fixing sleeve are sleeved with the positioning sleeves, the clamping jaws are installed on the two end faces of the fixing sleeve, and the limiting pins matched with the clamping jaws are installed on the end faces of the outer sides of the positioning sleeves; the shaping and repairing executing mechanism is provided with a roller assembly, a roller support and an adjusting screw rod, the roller support comprises two parts which are symmetrically arranged, the roller assembly is assembled in the roller support, and the adjusting screw rod is installed between the two parts of the roller support; the rotary power input mechanism is provided with a stress application rod and two sets of roller shafts, and the two ends of each roller shaft are assembled with the corresponding roller assembly and the stress application rod respectively. The problem that the surface of a cylinder body is uneven after the thin-walled cylinder part is shaped and repaired is solved, and the working efficiency is improved.

The invention discloses an armature jet flow deflection plate assembly and an applied electro-hydraulic servo valve, and belongs to the technical field of electro-hydraulic servo valves. The damper comprises an armature deflection plate assembly and a first-stage seat assembly, a traditional thin-wall cylinder spring tube is replaced with a spring beam of an n-shaped structure, return oil is sealed through a sealing ring, and magnetorheological fluid and a driver are installed on the spring beam to adjust rigidity. The spring tube solves the problems that a traditional spring tube is poor in vibration resistance, high in machining difficulty and non-adjustable in rigidity, the vibration resistance value can reach 100 G or above, the machining cost is reduced, the spring tube is suitable for flow servo valves of different specifications, the influence of a sealing ring on armature displacement hysteresis is eliminated through the structural design, and the zero-position stability is improved.

The utility model discloses a positioning machining device suitable for thin -walled cylinder class spare, the utility model relates to mechanical engineering and manufacturing technical field, scheme includes: a positioning machining device suitable for thin -walled cylinder class spare, include: base, support subassembly, support subassembly installs on the base, and support subassembly is used for providing support to thin -walled cylinder class spare, peripheral location subassembly, peripheral location subassembly installs on the base, and peripheral location subassembly arranges along the outside of support subassembly, inner support location subassembly, inner support location subassembly installs on the base, and inner support location subassembly arranges along the inside of support subassembly, wherein, peripheral location subassembly and inner support location subassembly form the opposite positioning constraint in the same radial position of thin -walled cylinder class spare, to realize the positioning clamping of cooperation, can improve the positioning mode to thin -walled cylinder class spare through the inside and outside cooperative support structure, and reduce the deformation risk that the outer wall pressurization leads to.

The invention relates to a tappet sleeve of a high-flow electric unit pump, which comprises a sleeve main body, a sleeve main body and a sleeve main body, the oil inlet ring groove is arranged around the outer circle of the sleeve main body, is positioned at one end, provided with the tappet body roller, of the sleeve main body, and is used for receiving pressure oil from a pump box lubricating oil inlet; the symmetrical oil inlet holes are two radial holes formed in the sleeve main body, one end of each radial hole is communicated with the oil inlet ring groove, and the other end of each radial hole is communicated with an annular gap formed between the sleeve main body and the tappet body; the oil drainage groove is formed below the radial hole in the axial direction of the sleeve body and used for communicating the annular gap with a cam shaft cavity in the lower portion of the sleeve body. Through the tappet sleeve, the lubricating mode and the lubricating structure of the tappet body assembly of the electronic unit pump are improved, and the effect of improving the reliability of the electronic unit pump is achieved.