21 results about "Thin walled cylinder" patented technology

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.

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 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.

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 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.

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.

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.

A thin-walled cylinder pressure sensor based on distributed optical fiber strain measurement is characterized in that one end of a sensing sleeve is a closed end, the middle of the sensing sleeve is a thin-walled sensing section, the other end of the sensing sleeve is a connecting end, the connecting end of the sensing sleeve is connected with a connector, and an axial through hole is machined in the center of the connector and communicated with a cavity of the sensing sleeve; and a single-mode optical fiber is wound on the thin-wall sensing section of the sensing sleeve. The optical fiber and the thin-walled cylinder structure are combined, global continuous strain monitoring is carried out on the outer wall of the sensing sleeve, strain distribution complete information of the whole cylinder wall is obtained, the limitation of traditional sensor point type measurement is broken through, the situation that key pressure change areas are omitted due to limited measurement points is avoided, pressure field distribution data can be synchronously obtained, and the measurement accuracy is improved. And a brand new technical path is provided for accurate analysis and fault pre-judgment in a complex pressure environment.

The invention provides a high-heat-capacity aluminum shell design applied to small lead type and ox horn type aluminum electrolytic capacitors, and the capacitor solves the problems of fixed supporting and efficient heat conduction of an internal core package by adopting the high-heat-capacity aluminum shell, so that the performance, the service life and the reliability of the capacitor are improved. According to the technical scheme, a uniform thin-wall cylinder and an X-Y-shaped groove carved in the bottom of the uniform thin-wall cylinder serve as a pressure relief valve, an aluminum shell for simply wrapping a core cladding is redesigned into an aluminum shell which has the effects of positioning, pushing, supporting and conducting heat on the core cladding in a cavity and is additionally provided with a pressure relief valve mechanism and is of a space three-dimensional frame structure, and the pressure relief valve mechanism is arranged on the aluminum shell. Wherein the thermal capacity value of the aluminum shell structure mass has great influence on the heat conduction efficiency, and the aluminum shell can change the thermal capacity to help the heat of the core package to be efficiently conducted and dissipated to the outside of the aluminum shell.

This invention provides an embedded cylindrical tube honeycomb sandwich panel, its molding method, and its application. The embedded cylindrical tube honeycomb sandwich panel includes an upper panel and a lower panel. Multiple honeycomb cores are longitudinally arranged between the upper and lower panels. Each honeycomb core includes a honeycomb and a thin-walled cylinder. The top of the thin-walled cylinder is longitudinally positioned on the bottom surface of the upper panel, and the bottom of the honeycomb is longitudinally positioned on the top surface of the lower panel. The thin-walled cylinder is inserted into the honeycomb, and its outer wall is tangent to the inner wall of the honeycomb, reducing the gap between the thin-walled cylinder and the honeycomb to provide synergistic impact resistance. This invention also provides a molding method for the embedded cylindrical tube honeycomb sandwich panel and its application in a near-field explosion finite element simulation model. This invention uses the honeycomb embedded cylindrical tube structure in the core material design of the sandwich panel, combining the synergistic effect of the sandwich structure panels to improve the structure's protective characteristics under blast shock waves.

The invention relates to the technical field of pressure measurement, in particular to an internal pressure non-contact measurement method and device for a thin-walled cylindrical pressure vessel, and the method comprises the steps: setting axial strain measurement points in the circumferential direction of the outer wall of the pressure vessel; synchronously acquiring a real-time axial strain measurement value generated at each axial strain measurement point due to the change of the internal pressure of the container; calculating a distribution consistency index for representing the strain consistency of each current measurement point; according to the distribution consistency index, selecting a pressure calculation strategy adaptive to the current strain distribution state, and calculating to obtain an internal pressure estimation value of the pressure vessel based on the real-time axial strain measurement value; according to the method, discrete strain gauge measuring points are regarded as sparse sampling of a continuous strain field, the uniformity of the strain field is evaluated by analyzing the data consistency of the sampling points, and an optimal pressure resolving strategy is intelligently selected accordingly; and meanwhile, an environmental parameter monitoring and model self-learning mechanism is introduced to dynamically compensate interference, so that high-precision and high-reliability non-contact measurement is realized.