55 results about "Thin walled cylinder" patented technology

The invention relates to the technical field of anti-deformation machining of thin-walled cylinders, and discloses an intelligent anti-deformation machining device for a thin-walled cylinder and a using method of the intelligent anti-deformation machining device. The device comprises a base, a supporting mechanism, a clamping height adjusting mechanism, a self-adaptive clamping mechanism and a positioning clamping head, the clamping height adjusting mechanism is arranged on the base, the supporting mechanism is arranged on the periphery of the clamping height adjusting mechanism, and the self-adaptive clamping mechanism is arranged on the clamping height adjusting mechanism and located above the supporting mechanism. A positioning clamping head is arranged on the self-adaptive clamping mechanism, and a displacement sensor and a pressure sensor are arranged on the self-adaptive clamping mechanism and the positioning clamping head respectively; according to the using method, the height of the self-adaptive clamping mechanism is adjusted through the clamping height adjusting mechanism, the thin-walled cylinder is fixed through the self-adaptive clamping mechanism and the positioning clamping head, and deformation and clamping force of the thin-walled cylinder are detected through the displacement sensor and the pressure sensor respectively. Deformation of the thin-walled cylinder in machining is effectively prevented.

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 belongs to the technical field of gearbox production, and particularly relates to a thin-wall cylinder tapping device and method in a planetary structure gearbox. The thin-walled cylinder workpiece tapping device is reasonable in structural design and mainly comprises a platform, a rotary bearing, a positioning mechanism, a support, a first push rod, a movable frame, a vertical linear guide rail pair and a tapping mechanism, the positioning mechanism is used for adsorbing and locking a thin-walled cylinder workpiece, and the rotary bearing is used for driving the positioning mechanism and the thin-walled cylinder workpiece to rotate in the circumferential direction; the distance between the tapping mechanism and the thin-walled cylinder workpiece is adjusted through the first push rod, the height position of the tapping mechanism is adjusted through the vertical linear guide rail pair, and the tapping requirements of different positions of a cylinder part in the thin-walled cylinder workpiece are met in this way. And meanwhile, an anti-deformation suction cup is additionally arranged in the punching mechanism and can adsorb and lock the peripheral part of the punching part in advance before punching, so that when the punching die head carries out punching operation, the peripheral part cannot be deformed.

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 invention provides a turning machining method for a thin-wall disc part, the thin-wall disc part is composed of a cylinder and an annular disc body which are integrally formed, the annular disc body is located in the axial middle of the cylinder, and the machining method comprises the steps that S1, a primary blank is roughly turned; s2, parts are clamped, specifically, the lengthened part of the primary blank is clamped through a stepped mandrel; and S3, the part is subjected to finish turning and cut off. The method is ingenious in design, low in cost, simple in process, convenient to operate, low in requirement for skills of operators and stable in machining quality; a thin-wall cylinder of the thin-wall disc part is not subjected to clamping force generated by clamping of the chuck, and part deformation caused by uneven stress is effectively avoided; the used clamp is easy to manufacture and low in cost, the matched turning method is convenient to operate, the dimensional tolerance of machined parts is stable, and the technical requirements can be guaranteed; the device is suitable for turning of all thin-wall disc parts of similar structures, and the sizes of the stepped mandrel and tool accessories can be adjusted according to different boundary dimensions of the parts.

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 invention discloses a safety evaluation method and equipment for a steel welded vertical atmospheric storage tank, a medium and a product, and relates to the technical field of safety evaluation of atmospheric storage tanks. Determining the stress state of the defect according to the defect of the atmospheric storage tank; according to the stress state of the defect and the material performance data of the atmospheric storage tank, a load ratio is obtained through calculation; calculating a stress intensity factor according to the stress state of the defect; calculating to obtain a fracture ratio according to the stress intensity factor; and generating an evaluation result according to the load ratio, the stress intensity factor and the fracture ratio. According to the method, the safety of the vertical atmospheric storage tank under the condition that weld defects exist can be scientifically evaluated, the situation that the thin-wall cylindrical structure deforms due to local stress caused by weld repair is avoided, and reliable guarantee is provided for safe operation of the vertical atmospheric storage tank.

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.

A turning method for a thin-walled cylinder with reinforcing ribs on an inner molded surface is suitable for turning the thin-walled cylinder with the reinforcing rib structure on the inner wall, the ratio of the diameter to the wall thickness larger than 200 and the length-diameter ratio larger than 2, and has the advantages of being simple in tool, reasonable in design, easy to operate and low in cost. Compared with a traditional turning method using a horizontal lathe and an inner supporting tool, the turning method has the advantages that the percent of pass of the products can be increased by more than 40%, the diameter dimensional tolerance of the products is controlled to be within 0.15 from 0.3, the wall thickness dimensional tolerance is controlled to be within 0.2 from 0.3, and the uniformity of the wall thickness of the products is improved. In conclusion, the method is convenient, reasonable in design, low in implementation cost, capable of being effectively applied to machining of the thin-wall metal cylinder with the reinforcing rib structure on the inner molded surface, easy to operate, high in practicability, good in anti-deformation effect, capable of effectively improving the product percent of pass, good in use effect and convenient to apply and popularize.

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 utility model provides a large-slenderness-ratio ultrahigh-strength steel thin-wall cylinder thrust device which comprises a thin-wall cylinder. One ends of the two sections of thin-wall cylinders are connected with the front butt joint flange and the rear butt joint flange respectively, the other ends of the two sections of thin-wall cylinders are provided with the front adapter disc and the rear adapter disc respectively, the rocket sled tackle is further installed on the outer wall of the end provided with the front adapter disc, and butt joint grooves are machined in the inner walls of the front adapter disc and the rear adapter disc respectively. A plurality of bolt holes are annularly distributed in the outer wall of the butt-joint groove, and the butt-joint groove is formed in the tail end of the thin-wall cylinder and fixed through hexagon socket screws. A thin-wall structure is adopted, so that the weight is light; the front and rear adapter plates can be quickly positioned and butted with the product; and by utilizing the butt flange, not only can large impact load in the launching test process be borne, but also the structure is simple and the processing is easy.

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.