54 results about "Radial position" patented technology

The embodiment of the invention discloses a multi-sensor monitoring and compensating method for machining deformation of a large annular part. According to the embodiment of the invention, the feed-forward compensation amount can be generated on the basis of the predicted radial deformation amount of the stress abrupt change area in the surface radial deformation appearing time when the large annular part is machined, and then the feedback compensation amount is generated according to the deviation between the expected machining contour and the actual radial position data of the large annular part; and generating a total compensation amount according to the feedback compensation amount and the feed-forward compensation amount, and adjusting the motion trail of a cutter on the machine tool according to the total compensation amount, and the expected machining contour, the shape tolerance and the position tolerance of the large annular piece. Therefore, according to the embodiment of the invention, deformation caused by stress release can be compensated in real time in the machining process of the large annular part, and the compensation efficiency is improved.

A method includes: deriving a first absolute motion of the first optical sensor based on radial positions, azimuthal positions, radial distances, and radial velocities of points in a first cluster of points representing a first static reference surface in a first frame captured by the first optical sensor; deriving a second absolute motion of the second optical sensor based on radial positions, azimuthal positions, radial distances, and radial velocities of points in a first cluster of points representing a first static reference surface in a second frame captured by the second optical sensor; calculating a rotational offset between the first optical sensor and the second optical sensor based on the first absolute motion and the second absolute motion; and aligning a third frame captured by the first optical sensor with a fourth frame captured by the second optical sensor based on the rotational offset. a

A method includes: deriving a first absolute motion of the first optical sensor based on radial positions, azimuthal positions, radial distances, and radial velocities of points in a first cluster of points representing a first static reference surface in a first frame captured by the first optical sensor; deriving a second absolute motion of the second optical sensor based on radial positions, azimuthal positions, radial distances, and radial velocities of points in a first cluster of points representing a first static reference surface in a second frame captured by the second optical sensor; calculating a rotational offset between the first optical sensor and the second optical sensor based on the first absolute motion and the second absolute motion; and aligning a third frame captured by the first optical sensor with a fourth frame captured by the second optical sensor based on the rotational offset.

The utility model belongs to the technical field of aerospace, and particularly relates to a pipeline positioning device which comprises a bottom plate. The supporting plate extends upwards in the direction intersecting with the bottom plate; the first radial positioning clamping seat is provided with a first support for bearing parts of the first radial positioning clamping seat and a positioning pin arranged on the first support so as to position a pipe fitting; the second radial positioning clamping seat is arranged on the bottom plate and is provided with a second support for bearing parts of the second radial positioning clamping seat and a clamping block for bearing the corrugated pipe so as to position the corrugated pipe; the end positioning assemblies are arranged at the positions corresponding to the pipeline opening and comprise the first end positioning assembly and the second end positioning assembly, the first end positioning assembly and the second end positioning assembly are arranged at different heights, the end positioning assemblies are at least partially inserted into the corresponding ends of the pipeline, and each end positioning assembly comprises a support with a sliding block arranged on the bottom face; the positioning core is fixedly connected to the support and connected with the end face of the pipeline flange in an abutting mode. And the convenience of positioning operation in the splicing operation of the multiple pipe fittings or splicing and welding among the multiple pipe fittings is improved.

This application relates to a satellite orbit prediction method. The method includes: constructing an expression for the gravitational force acting on the satellite based on its mass and distance from Earth; constructing a differential equation for the satellite's acceleration based on Newton's second law and the expression for the gravitational force; solving the differential equation based on the conservative force field characteristics of mechanics, calculating the gravitational potential energy function and its derivative with respect to time; transforming the derivative expression based on the mechanical conservation law that the sum of the derivatives of kinetic energy and gravitational potential energy with respect to time is zero, to obtain the derivative expression for acceleration; converting the time relationship in the derivative expression of acceleration to a radial position relationship based on the principle of conservation of angular momentum; integrating the radial position relationship to obtain the satellite's orbit equation. This method enables satellite orbit prediction.

The application provides a turbine rotor wax mold splicing tool and relates to the technical field of investment casting.The first clamping protrusion and the second clamping protrusion are arranged on the top surface of the blade positioning disc in a radial direction, the first clamping protrusion and the second clamping protrusion are respectively provided with a first V-shaped clamping groove and a second V-shaped clamping groove, and the first V-shaped clamping groove and the second V-shaped clamping groove are respectively used for supporting the near-root cross section of the unit blade and the near-tip cross section of the unit blade.The V-shaped clamping groove structure can hold the blade and is not easy to slide, and is more firm.The blade mounting angle positioning pin is used for supporting the blade body and the blade basin of the unit blade, and the unit blade is positioned in the axial direction and the angular direction.The edge plate parting surface of the unit blade is located on the side surface of the radial positioning disc, the contact area is large, the positioning is more reliable, the blade mounting angle positioning pin can move in the vertical direction, is suitable for unit blades with different blade mounting angles, the radial positioning disc can move in the vertical direction, and is suitable for unit blades with different radial dimensions.

The utility model relates to the technical field of bearing detection tools, in particular to a radial displacement detection device for a conical bearing retainer, which comprises an annular mold with an inner cavity profiled to an inner cavity of a bearing outer ring, the large opening end of the inner cavity of the annular mold faces upwards, a measuring groove is arranged at one side part of the annular mold, and a mounting piece for fixedly mounting a dial indicator is arranged on the outer side of the measuring groove; conical positioning blocks coaxial with the annular mold are arranged above the annular mold at intervals, and the small head ends of the conical positioning blocks face downwards; the driving device is used for driving the conical positioning block to move in the axial direction; according to the utility model, the structure is simple, the radial positions of the annular die and the conical positioning block are relatively fixed, and the radial displacement of the precise tapered roller bearing retainer can be directly judged quickly and accurately according to the variable quantity displayed on the dial indicator; and the accuracy and the measurement efficiency of the displacement of the assembly retainer in the precise tapered roller bearing are effectively improved.

The invention relates to a reed pipe potting module and a potting assembly method.The potting module comprises a reed pipe, an inner bag, a module pipe, a signal pipe and a self-locking nut, the reed pipe is arranged in an inner cavity of the inner bag, the inner bag is coaxially arranged in the module pipe and sealed through potting glue, the module pipe and the signal pipe are coaxially arranged and connected through threads, and the self-locking nut is arranged in the inner cavity of the inner bag; the signal pipe is coaxially arranged in the sensor inner pipe; the module pipe is rotated to drive the reed pipe to move in the axial direction so as to achieve position adjustment of the reed pipe, and the module pipe and the signal pipe are locked through a self-locking nut. According to the invention, the reed pipe is coaxially wrapped in the inner bag, and the coaxial assembly structure of the module pipe and the signal pipe is combined with the coaxial positioning of the signal pipe in the sensor inner pipe, so that the radial position deviation of the reed pipe after encapsulation is avoided. Meanwhile, continuous adjustment of the axial position of the reed pipe is achieved by rotating the module pipe. In addition, the reed switch is integrally wrapped in the inner bag, so that the risk that the glass tube is crushed in the filling and sealing process is reduced.

The invention discloses a progressive adjustment blade-replaceable multi-cutting-edge guide bar reamer, which belongs to the technical field of reamers and comprises a reamer body, a reamer handle and a modular connecting structure between the reamer body and the reamer handle. A plurality of elastic adjustable cutter clamps are evenly distributed on the periphery of the reamer body, and each cutter clamp is divided into a fixing portion and an adjusting portion through an adjusting elastic groove area and provided with an adjusting jackscrew and a pre-tightening screw. The tail end of the adjusting jackscrew abuts against the bottom of the adjusting groove to provide outward ejection force, the head of the pre-tightening screw presses the inner side of the adjusting part to provide inward locking force, and gradual and gapless fine adjustment of the radial position of the blade is achieved through cooperation of the two. And a standardized replaceable blade with an extremely narrow margin is mounted on the tool holder. And a guide strip subjected to accurate grinding is embedded on the cutter body, is used as a zero reference for blade adjustment, and also plays a role in supporting and guiding. The reamer body and the reamer handle are in double-sided positioning connection through a 1: 10 short cone. High-precision large-diameter hole machining is achieved, tool cost is reduced, efficiency is improved, and the high-precision large-diameter hole machining device has the advantages of being convenient to adjust, long in service life and high in universality.

The utility model discloses a positioning device for a Hall electric thruster magnetic induction intensity test probe, which comprises a positioning main body, a fixed clamping block assembly and a measurement positioning plug block, the fixed clamping block assembly comprises a fixed main body and a sliding clamping block, the fixed main body is arranged on the front end surface of the positioning main body, and the sliding clamping block is arranged on the front end surface of the positioning main body. The fixing body is provided with a movable sliding groove and a sliding clamping block, one end of the sliding clamping block is connected with the movable sliding groove through a spring, a plurality of positioning holes are formed in the front end face of the positioning body, the positioning holes and the fixing body are arranged in a staggered mode, and measurement positioning plug blocks are installed in the positioning holes. According to the utility model, the device and a product are fixed through the device fixing fixture block, the measurement positioning plug blocks of the rectangular holes with different thicknesses and depths are embedded into the positioning holes of the positioning main body to determine the test points of different axial positions of the fixed radial positions, and the magnetic field intensity measurement handheld gauss meter probe goes deep into the rectangular holes. The magnetic field intensity of a specific position can be obtained, and the uniformity of circumferential magnetic field intensity distribution can be obtained.

The application provides a convex closed wave spring and a preparation method thereof. The spring sheet of the convex closed wave spring is in a closed circular shape and has a plurality of wave crests and troughs connected in sequence, and a spherical convex structure is further arranged on the wave crest and trough. The preparation method of the convex closed wave spring comprises the following steps: a) material selection and preparation, b) blanking, c) cutting, d) wave forming, e) boss forming, f) turning inner and outer circles, and g) aging and shaping. The application adopts linear cutting or laser cutting for blanking, reserves a shrinkage allowance for subsequent forming, ensures compensation of the diameter size of the inner and outer circles, forms the wave shape and the convex structure in two steps through a mold, ensures the radial position accuracy of the bulge, avoids changes of the convex position caused by the material flowing to the radial center direction when the convex size is formed into a wave shape, and avoids cracking phenomena at the convex position, shrinkage defects and bulge deviation phenomena near the convex position caused by poor material fluidity.

Clamping unit (50), in particular for a gripping device (10) or for a linear unit, with a clamping element (52) for fixing the clamping unit (50) against a guide (12), wherein an actuating element (56) is provided which can be actuated in a base housing (54) along a longitudinal axis (58) and which is coupled to the clamping element (52) in such a way that the axial movement of the actuating element (56) along a longitudinal axis is reduced into an axial movement of the clamping element (52) along the longitudinal axis, wherein the actuating element (56) has at least one wedge surface (70) extending obliquely to the longitudinal axis, wherein at least one actuating body (72) cooperating with the wedge surface (70) is provided, which changes its radial position during an axial movement of the actuating element (56) and thereby actuates the clamping element (52) via a deflection mechanism, and wherein the clamping element (52) has a wedge surface (70) extending obliquely to the longitudinal axis (58),The inclined surface (74) has an acute angle (α) between the wedge surface (70) and the actuating body (72) such that the clamping element (52) is moved axially when the actuating body (72) moves radially.

The application belongs to the field of engine assembly detection, and specifically discloses a positioning tool for measuring the radial clearance of a rotatable blade and a use method, which comprises: an adapter plate, a connecting hole and two positioning pins; one end of the adapter plate is connected with the outer wall of an air inlet casing through the connecting hole, and the two positioning pins are respectively connected with the middle part of the adapter plate; the bottom ends of the two positioning pins are respectively in contact with the rear end face of the air inlet casing. The positioning tool is used to realize the angular positioning of the blade, thereby determining the radial position of the blade, completing the accurate measurement of the radial clearance of the rotatable blade when rotating to two limit angles, facilitating on-site detection, avoiding rework, greatly improving the assembly quality and efficiency of the rotatable blade, avoiding the problems of blade damage, casing scratch and deformation of the linkage ring caused by the counter torque generated by the blade in severe cases.

The utility model provides a bearing measuring instrument with adjusting function belongs to precision measurement technical field, including measuring instrument body and measuring claw, the outside of measuring instrument body is provided with adjusting mechanism and dismounting mechanism, first electric push rod fixed mounting is in the outside one side of measuring instrument body. The utility model discloses the dismounting mechanism of setting, realized the fastening installation of the measuring claw and the magnetic block of the threaded head of tightening state, then convenient to the measuring claw dismounting replacement, and the smooth movement of the measuring claw of the magnetic attraction board and the magnetic block of magnetism connection state can assist installation state, the threaded head of tightening state is realized the fastening installation of the measuring claw and the magnetic block through the magnetic block of setting adjusting mechanism, and then convenient to the radial position of the measuring claw adjustment, the radial movement of the measuring claw of installation state on the magnetic attraction board surface is realized through the magnetic block of setting first adjusting rod and slide, and then convenient to the radial position of the measuring claw adjustment, the axial movement of the measuring claw of installation state on the magnetic attraction board surface is realized through the magnetic block of setting second adjusting frame and slide, and then convenient to the axial position of the measuring claw adjustment.

The utility model discloses a kind of oil seal cover side hole precision positioning stamping device, including workbench, positioning mechanism being set on workbench and the stamping mechanism being located just above positioning mechanism, the positioning mechanism includes main positioning seat, a pair of V-shaped groove positioning block for clamping from both sides and accurately positioning the radial position of oil seal cover and axial positioning baffle for limiting the axial displacement of oil seal cover, the main positioning seat is fixedly installed on the upper surface of workbench, the V-shaped groove positioning block is symmetrically set in the both sides of main positioning seat and fixed on workbench, the axial positioning baffle is set in the side rear of main positioning seat and fixed on workbench.This oil seal cover side hole precision positioning stamping device solves the accurate positioning problem of cylindrical workpiece side hole machining through multiple positioning systems, combined with floating guide stamping mechanism and automatic auxiliary function, high-precision, high-efficiency, high-reliability and low-maintenance cost side hole stamping machining are realized.

To provide a fixed constant velocity universal joint that reduces the cost of machining the track groove on the outer joint member, improves machining quality, and reduces weight. [Solution] In a fixed constant velocity universal joint comprising an outer joint member 2, an inner joint member, a plurality of balls, and a retainer having pockets for housing the balls, the ball trajectory centerline of the track groove of the inner joint member is formed in mirror image symmetry with the pair of ball trajectory centerlines X of the outer joint member 2, with reference to a plane perpendicular to the axis that includes the joint center O when the operating angle is 0°, and the track groove 7 of the outer joint member 2 is formed in the range necessary for ball assembly from the axial position at the maximum operating angle, and a relief portion Tr is formed in the range of the track groove 7 between the radial position Sr leaving the ball contact point C and the spherical inner surface 6, and the radial dimension E is larger than the radial dimension of a chamfered portion Tc of substantially constant width provided in substantially the entire axial area between the spherical inner surface 6 and the track groove 7 of the outer joint member 2.

The invention relates to the technical field of bearing pre-tightening force loading, and discloses an angular contact bearing pre-tightening force and pre-tightening interval measuring device and method.The measuring device comprises a support, a positioning assembly, a force applying assembly and a measurer, the support comprises a plurality of clamping rods distributed on the support in the circumferential direction, and angular contact bearing placement positions are formed between the opposite ends of the clamping rods; wherein each clamping rod is adjustable along the radial position of the angular contact bearing, the force application assembly comprises a pressure plate, a pressure rod and a plurality of pressure columns, each pressure column can abut against the same end face of an inner ring of the angular contact bearing, a pressure sensor is arranged on the pressure plate, and the pressure rod is movably arranged on the support along the axial direction of the angular contact bearing and is in compression joint with the pressure sensor. The measurer is arranged on the support and used for measuring the end face height of an outer ring of the angular contact bearing and the end face height of an inner ring of the angular contact bearing. The pre-tightening force of any design parameter is converted into the corresponding pre-tightening interval under non-actual assembly, and the pre-tightening interval is used for the actual assembly link.

The utility model belongs to the technical field of inner container probe installation, and discloses a welding positioning device which comprises a base, a rotating piece, a first fixing piece and a length adjusting piece. The rotating piece is rotationally matched with the rotating groove; the first fixing piece is used for fixing the rotating piece after the rotating piece rotates in place; the length adjusting part is arranged on the rotating part, the extending length of the length adjusting part relative to the rotating part can be adjusted, and a positioning hole is formed in the tail end of the length adjusting part. Firstly, the base is connected to a container opening flange plate, then the rotating piece is rotated to determine the position of the inductive probe installation piece in the circumferential direction, and after the rotating piece rotates in place, the first fixing piece is adopted to fix the rotating piece; and then the extending length of the length adjusting piece relative to the rotating piece is adjusted to determine the position of the inductive probe mounting piece in the radial direction, and after the length adjusting piece is adjusted in place, the area corresponding to the positioning hole is the welding area of the inductive probe mounting piece. The positioning operation is simple, and the positioning is accurate.

Methods, systems, and devices for manufacturing a wearable ring device are described. The manufacturing assembly may rotate, by a rotational component, an inner housing member of the wearable ring device to a radial orientation based on an optical alignment process. A positioning component of the manufacturing assembly may insert and align an optical component of a flexible circuit assembly into at least one aperture of the inner housing member by moving the flexible circuit assembly from a first position adjacent to the inner housing member to a second position on the inner housing member. The manufacturing assembly may secure one or more edges of the flexible circuit assembly onto the inner housing member using a plurality of arms of the positioning component and apply, by an automatic adhesive dispensing device of the manufacturing assembly, a polymeric material to adhere the flexible circuit assembly to the inner housing member.

The invention relates to the technical field of pipeline detection, and discloses a thermal power plant boiler furnace heating surface foreign matter detection device and a detection method thereof.The thermal power plant boiler furnace heating surface foreign matter detection device comprises a substrate and a detection pipeline installed on the surface of the substrate, and a header is arranged at the tail end of the detection pipeline. According to the invention, the ejector rod is pulled, the ejector rod drives the swing rod to rotate, and the swing rod drives the ultrasonic transducer to flexibly rotate around the positioning seat, so that the accurate adjustment of the injection angle is realized; meanwhile, the positioning column can rotate under the action of the ejector rod to drive the ultrasonic transducer to adjust the radial position in the detection pipeline so as to meet the detection requirements of pipelines with different diameters; angle adjustment and radial position adjustment are matched with each other, and multiple multi-angle detection operations are combined, so that each area in the pipeline can be scanned and detected in all directions, a blind area caused by single-angle detection is eliminated, and the problems that a traditional ball passing test is fuzzy in judgment, easy to clamp a ball and poor in detection accuracy are solved. A sight glass inspection method is difficult to pass through in a complex pipeline and is easy to block, and the detection accuracy is improved.

The invention discloses a coaxial drilling clamp for a composite material and a metal pipe fitting and a drilling method. A positioning bottom plate in the clamp is mounted in the middle of a base, and the positioning bottom plate is positioned and placed on the outer wall surface of the composite material pipe fitting through a first-level height boss; the outer wall face of the extending end of the metal pipe fitting arranged in the composite pipe fitting body in a sleeved mode is positioned and placed through the second-level height boss, and a limiting structure is arranged at the end, located on the second-level height boss, of the positioning bottom plate and used for limiting the axial and radial positions of the metal pipe fitting; the cushion block is arranged at the bottom of the other end of the composite pipe; the two drill plates are fixedly installed on the base through the supporting plates, coaxial tool bush installation holes are formed in the corresponding positions of the positioning plates, and the first drill plate is used for limiting the axial position and the radial position of the composite pipe fitting. And tool bushes are pressed in the tool bush mounting holes in the positioning plates, so that the drilling tool penetrates through the two coaxial tool bush mounting holes in the two positioning plates, and coaxial drilling of the composite pipe fitting and the metal pipe fitting is implemented.

Washer arrangement comprising a pressure washer (1, 100) and a plate (2, 201); wherein the pressure washer (1, 100) has a substantially annular shape and comprises a washer body (112) and two or more positioning clips (111) projecting radially inward from an inner circumference of the washer body (112), wherein at least one side of the positioning clip has a positioning projection (1111) projecting in a circumferential direction, and the positioning projection (1111) defines a radial positioning section (1114) of the pressure washer (1, 100); wherein the plate (2, 201) has a substantially annular shape, with an inner circumferential section of the plate (2, 201) being provided with two or more positioning notches (211);an edge of at least one side of the positioning notch (211) is provided in the circumferential direction with a positioning groove (212) and the positioning groove (212) defines a radial positioning section (2121) of the plate (2, 201); and wherein the pressure disc (1, 100) is mounted on an end face of the plate (2, 201) and the positioning clamp (111) extends into the positioning notch (211) in a mounted state and the radial positioning section (1114) of the pressure disc (1, 100) and the radial positioning section (2121) of the plate (2, 201) are in contact with each other or are facing each other with a small interval, thereby defining a radial position of the pressure disc (1, 100) relative to the plate (2, 201).

The invention provides a beam assembling tool and a photo-thermal collector assembling device.The beam assembling tool comprises a fixing support and adjusting assemblies, the adjusting assemblies comprise the first adjusting assembly, the second adjusting assembly and the third adjusting assembly, the first adjusting assembly is movably connected with the fixing support in the vertical direction of the fixing support, and the second adjusting assembly is movably connected with the third adjusting assembly in the vertical direction of the fixing support; the second adjusting assembly is movably connected with the first adjusting assembly in the length direction of the first adjusting assembly, and the third adjusting assemblies are located at the two ends of the fixing support and movably connected with the first adjusting assembly in the length direction of the fixing support. The radial position, the axial position and the total length of the cross beam are limited by adjusting the first adjusting assembly, the second adjusting assembly and the third adjusting assembly, so that the positions of all joints of the cross beam are kept consistent, all the joints do not need to be manually positioned during assembling, the cross beam is assembled in an auxiliary mode according to the cross beam assembling tool, the assembling steps are simple and convenient, and the assembling efficiency is improved. Time and labor are saved, the assembling efficiency is high, the assembling precision is improved, and the rework rate of a beam finished product is reduced.

The invention discloses a core adjusting structure and a core adjusting jig. The core adjusting structure comprises a core adjusting lens, a lens outer frame and a core adjusting base. The lens outer frame is used for fixedly mounting the core adjusting lens and is provided with a core adjusting bayonet protruding out of the outer side wall of the lens outer frame; the core adjusting base is used for installing a lens outer frame, the core adjusting base is provided with a core adjusting groove corresponding to the core adjusting bayonet, and when the lens outer frame is installed on the core adjusting base, the core adjusting bayonet is located in the core adjusting groove and extends out of the core adjusting base; an external core adjusting jig can adjust the radial position of the lens outer frame on the core adjusting base by clamping the core adjusting bayonet extending out of the core adjusting groove; the core adjusting base further comprises a glue dispensing groove which is used for receiving glue and fixing the lens outer frame. An external core adjusting jig clamps the core adjusting bayonet and adjusts the position of the lens outer frame in the radial direction of the core adjusting base, so that the imaging quality of the lens can be improved, and the manufacturing cost of the core adjusting structure can be reduced.

The invention belongs to the technical field of installation and debugging of nuclear power station water pump oil seals, and particularly relates to a universal oil seal running-in tool and method for a water pump. The method comprises the following steps: heating a moving ring seat to 100 DEG C, carrying out hot charging on a transmission shaft to be matched with an oil seal, cooling to room temperature, mounting the oil seal on the moving ring seat, rotating a moving ring along with the transmission shaft, taking a static ring as a stable sealing reference, mounting two dial gauges, enabling gauge hands to be respectively vertical to the axial and radial positions of the oil seal and touch the end surface of the oil seal, and turning the transmission shaft; data of the dial indicator are recorded, it is ensured that the levelness and the coaxiality do not exceed 0.04 mm, the bearing is heated to 100 DEG C, then the bearing is subjected to hot charging to be matched with the position, matched with the bearing, of the transmission shaft and cooled to the room temperature, and the conical shaft and the conical hole of the positioning column are subjected to conical face matching. The oil leakage defect after the oil seal is installed can be effectively overcome, the oil seal adjusting frequency is reduced, the main line construction period is shortened, the overhaul work quality and work efficiency are greatly improved, and the running-in work before the new oil seal is installed becomes reliable and efficient.

The invention belongs to the technical field of assembly, and discloses a positioning system and an assembly method for a pressure-resistant cabin and a frame of an underwater vehicle, and a cabin mounting interface and a positioning piece mounting interface which are arranged at the front part of the frame of the underwater vehicle provide a foundation for positioning of the pressure-resistant cabin; a cabin body support at the rear part of the pressure-resistant cabin body is connected with a cabin body mounting interface of the frame, so that the axial fixation of the pressure-resistant cabin body is realized; the installation tool is connected with the first tool connector in the front of the pressure-resistant cabin, reliable connection points or bearing positions are provided for hoisting or lifting of the large pressure-resistant cabin, and carrying and preliminary positioning in the assembling process are greatly facilitated; the multiple positioning assemblies are connected with the positioning piece installation connectors of the frame, the radial positions of the parts, supporting the pressure-resistant cabin, of the positioning assemblies can be adjusted, and therefore accurate radial supporting and positioning of the pressure-resistant cabin are achieved. The problems that in the prior art, when a large pressure-resistant cabin is assembled, positioning precision is low, operation is complex, and consumed time is long are effectively solved.

This drive transmission device (100) comprises a planetary gear mechanism (5), and a case (6) that accommodates the planetary gear mechanism (5). The planetary gear mechanism (5) is provided with an internal ring gear (53). Formed at an inner surface (61) of the case (6) are a rotation restriction part (65) that restricts the relative rotation of the ring gear (53), and a radial positioning part (66) that positions the ring gear (53) in the radial direction R. Formed at an outer peripheral surface of the ring gear (53) are an engagement part (535) that engages with the rotation restriction part (65), and a fitting part (536) that fits in the radial positioning part (66). The engagement part (535) and the fitting part (536) are disposed at different positions in the axial direction (L).

The utility model provides a circular push-pull self-locking connector, which is used for signal transmission and comprises a plug and a socket. A first semicircular boss is arranged on the outer circumference of the front end of the shell of the plug, and a second semicircular boss is correspondingly arranged on the inner circumference of the front end of the shell of the socket, so that radial positioning fit is formed; the outer circumference of the housing of the plug is provided with an axial clamping groove, and the inner wall of the housing of the socket is provided with an elastic clamping block, thereby forming an axial clamping dual-positioning structure. According to the circular push-pull self-locking connector provided by the invention, through a unique dual-positioning structure, the anti-loosening capability of the connector in complex environments such as vibration and the like is greatly improved, and high-quality stable transmission of signals can be effectively realized.

The invention provides a three-dimensional flow guide structure, design method and system for a fan-shaped blade grid test of turbine blades, and the method comprises the steps: obtaining inlet airflow angles of a plurality of radial cross sections of a test blade, determining a plurality of fairing flow guide curves, constructing a fairing three-dimensional curved surface, and obtaining a fairing flow guide curve; three-dimensional curved surface sectors are constructed on the basis of the multiple smooth three-dimensional curved surfaces which are arranged in the circumferential direction; judging whether the three-dimensional flow field of the three-dimensional curved surface sector meets the inlet airflow angle requirement of the test blade or not; if yes, completing the design; if not, the parameters are adjusted until the requirements are met, and the design is completed; according to the method, the three-dimensional flow field is formed by designing and constructing the three-dimensional curved surface sector, so that the outlet airflow angle of the three-dimensional flow guide structure meets the requirement of the whole inlet airflow angle of the test blade, the theoretical state of the test blade can be simulated on the total radial position of the test blade, and the effectiveness and the utilization rate of the test result are improved.