13results about How to "Good centering effect" patented technology

The invention discloses a controllable reaming casing centralizer for a well and a related method. The casing centralizer comprises a centralizer body, a binding rope and a locking device, the centralizer body comprises a first shroud ring, a second shroud ring, a first bow piece and a plurality of second bow pieces; the first bow piece and the second bow pieces are evenly distributed between the first hoop ring and the second hoop ring in the circumferential direction. The middle portions of the first bow piece and the second bow pieces are bent inwards to form bent portions, the locking device is fixed to the inner side of the first bow piece, the binding rope penetrates through the locking device, a through hole is formed in the middle of the first bow piece, and the binding rope penetrates out of the inner side of the first bow piece through the through hole and is bound to the bent portions of the first bow piece and the second bow pieces. The locking device can be unlocked so as to release the binding rope; the casing centralizer improves the centering effect and the well cementation quality of a reaming section casing, solves the problem that a pipe string is difficult to descend, and is simple in structure, low in machining cost, convenient to popularize and apply on a large scale and beneficial to improving economic benefits.

The present invention discloses a multi-drive ultra-thin speaker, comprising a housing, a diaphragm connected and fixed to the housing, and at least two independent drive units, the drive unit comprising a voice coil unit and a magnetic circuit unit arranged corresponding to the voice coil unit, the housing comprising at least two mounting holes arranged side by side, the magnetic circuit unit being arranged in the mounting holes correspondingly, the voice coil unit being further connected and fixed with a centering support plate, the end of the centering support plate away from the voice coil unit being fixed to the housing, and a sound outlet hole for sound emission being arranged on the side wall of the housing. The multi-drive ultra-thin speaker of the present invention has a simple structure, high space utilization, a large effective radiation area, and good acoustic performance.

The present invention belongs to the technical field of gas turbines, and specifically relates to a semi-open centrifugal impeller with splitter blades, including a hub, main blades, and splitter blades. The hub is convex, and a concave arc-shaped transition section is provided on the hub. The main blades and splitter blades are evenly distributed on the arc-shaped transition section and are reinforced and connected to the hub through the blade root fillet. The rear end face of the hub is arc-shaped, and the dynamic balance counterweight hole and the dynamic balance deweighting belt are respectively arranged on the upper and lower end faces of the hub, and the dynamic balance effect is good. The present invention adopts the main blades and splitter blades to be evenly distributed alternately on the arc-shaped hub, and the structural strength is high. The main blades and splitter blades can pressurize the incoming gas in turn, and the total gas pressure efficiency is high, the pressure ratio is high, and the uniformity of airflow pressure is good, which ensures that the impeller can rotate stably at high speed, the vibration of the impeller is reduced, the centering ability of the impeller is enhanced, the noise is reduced, the durability is enhanced, and a relatively long and stable service life is guaranteed.

This invention discloses an integrated multi-nozzle air-assisted 3D printing nozzle, comprising an upper horizontal plate, a lower horizontal plate, m material feed cylinders, and a heating element, where m is 3-100. The upper horizontal plate is located above the lower horizontal plate, and the two together form an air chamber. An air inlet is provided on the air chamber. The top wall of the air chamber has m material feed cylinder channels, and the bottom wall has m gas channels. The m material feed cylinder channels and m gas channels are all vertically arranged and simultaneously connected to the air chamber. The m material feed cylinders are vertically arranged, and each material feed cylinder has a discharge port at its lower end. The m material feed cylinder channels, m gas channels, and m material feed cylinders correspond one-to-one. The top of the i-th material feed cylinder is located within and sealed to the i-th material feed cylinder channel, and its bottom is located within the i-th gas channel, with a gap between them for gas passage, i = 1, 2, ..., m. This invention has a simple structure and effectively solves the problems of existing technologies that cannot achieve multi-nozzle printing and simultaneous air-assisted 3D printing of multiple materials and colors.

The utility model discloses a centering shockproof sleeve of a grinding machine, which relates to the technical field of grinding machine equipment and comprises a cross beam, a through hole is arranged at the top of the cross beam, a shock-absorbing seat is inserted in the through hole, a bearing seat is inserted in an axis hole of the shock-absorbing seat, and a spacer bush is movably mounted in an axis hole of the bearing seat. A sliding bearing is movably installed at the top end of the spacer bush and fixedly connected with a bearing seat, an end cover is movably installed at the top of the bearing seat, a flange seat is fixedly connected to the top of the end cover, and an air cylinder is fixedly installed at the top of the flange seat. By the adoption of the structure, the shock absorption seat is inserted into the through hole and buffers part of vibration generated by operation of the air cylinder, so that abrasion generated by the lifting shaft and components such as a sliding bearing in the lifting process is reduced, the purposes of shock absorption, buffering and abrasion reduction are achieved, vibration generated by operation of the air cylinder is reduced, and the service life of the lifting shaft is prolonged. And meanwhile, the abrasion of parts is reduced.

The utility model relates to the technical field of lens processing, and provides a lens marking tool, which comprises a base body and at least two clamping assemblies, and is characterized in that the base body is provided with a mounting part for fixing a lens; the clamping assemblies are uniformly arranged on the base body at intervals around the mounting part, each clamping assembly comprises a clamping head and a driving part, the clamping heads are connected with the driving parts, the driving parts are used for driving the clamping heads to be close to or away from the mounting part, the clamping heads are suitable for being in surface contact with the side wall surface of the lens, and the driving parts are used for driving the clamping heads to be close to or away from the mounting part. And the lens is fixed on the mounting part. The lens marking tool provided by the utility model is used for solving the defect that the contact area between the clamping groove and the lens is small in the prior art, and the chuck is arranged to be in surface contact with the side wall surface of the lens, so that the stress concentration between the chuck and the lens can be reduced, and the lens is prevented from being damaged due to non-uniform stress; and the yield of the lenses in the marking process is improved.

The utility model discloses a wet-type electric axle adopting key positioning, which comprises a brake shell fixed on one side of a motor and a hub assembly fixed on the outer side of the brake shell, an output shaft is arranged in the brake shell, the output shaft is movably connected to the middle part of a parking brake shell through a bearing, and the hub assembly is connected with the brake shell through a bearing. The outer end of the output shaft extends into a shell of the hub assembly, a sun wheel shaft is arranged in the middle of the shell of the hub assembly, a driven gear is inserted into the inner end of the sun wheel shaft in a sleeved mode, the driven gear and the sun wheel shaft are connected, positioned and fixed through a flat key, and the outer side wall of the sleeve body portion of the driven gear is movably connected into the parking brake shell through a bearing. The driven gear and the sun gear shaft are connected through the flat keys, meanwhile, the planetary gear ring and the shell are connected through the first flat keys, the centering effect is improved, and operation is more stable.

The utility model relates to the technical field of target material production, and discloses a plane target material fixing device of a single-line cutting machine, which comprises a support plate, the inner wall of the support plate is provided with a sliding chute, the upper surface of the support plate is connected with a clamping shell in a sliding manner, the inner wall of the clamping shell is provided with a starting plug, the inner wall of the starting plug is connected with a clamping rod in a sliding manner, and the clamping rod is connected with the sliding chute. Springs are fixedly connected to the bottom ends of the clamping rods, a driving plate is slidably connected to the inner wall of the supporting plate, the lower surface of the clamping shell is fixedly connected to the top end of the driving plate, the outer wall of the driving plate is slidably connected to the inner wall of the sliding groove, and a driving assembly is arranged on the upper surface of the operation table. According to the clamping device, the driving plate drives the clamping shell to slide on the upper surface of the supporting plate, the clamping rod slides on the inner wall of the starting plug and can be rapidly fixed through the spring, the problem that an object is damaged is solved through the rubber foot pad, and the clamping and fixing force can be improved and reduced through pressurization and decompression through the air pipe connector.

The utility model discloses an ups power supply detection device, and relates to the technical field of power supply endurance detection, the ups power supply detection device comprises a detection frame and a housing fixedly installed in the middle of the bottom of an inner cavity of the detection frame, the top of the housing is provided with sliding blocks close to four sides, and the bottoms of the sliding blocks are jointly provided with a moving assembly. A clamping assembly is installed on the inner side of each sliding block, when the UPS power supply detection equipment is used, the UPS power supply main body can be clamped and positioned through the arrangement of the clamping assemblies, the UPS power supply main body can be protected through the arrangement of a reset spring and a soft cushion, the stability during detection is improved, and the detection efficiency is improved. And in addition, power can be provided for movement of the clamping plate through arrangement of a moving assembly, the clamping work can be conveniently carried out, meanwhile, the centering effect can be achieved, the problem that the detection work is carried out due to the fact that a worker is not placed in the center is solved, and the using effect of the device is improved.

The application discloses a casing centralizer for controllable reaming well and a related method. The casing centralizer comprises a centralizer body, a binding rope and a locking device. The centralizer body comprises a first hoop ring, a second hoop ring, a first bow piece and a plurality of second bow pieces. The first bow piece and the plurality of second bow pieces are uniformly distributed between the first hoop ring and the second hoop ring in a circumferential direction. The middle part of the first bow piece and the second bow piece is inwardly bent to form a bent part. The locking device is fixed to the inner side of the first bow piece. The binding rope passes through the locking device. The middle part of the first bow piece is provided with a through hole. The binding rope passes through the through hole from the inner side of the first bow piece and is bound to the bent part of the first bow piece and the plurality of second bow pieces. The locking device can be unlocked to release the binding rope. The casing centralizer improves the centering effect of the casing in the reaming section and the cementing quality, solves the problem of difficult pipe string running in, has a simple structure, low processing cost, is convenient for large-scale popularization and application, and is favorable for improving economic benefits.

The utility model provides a tire centering device which comprises a conveying belt arranged on a machine frame, the conveying belt comprises a row of conveying rollers, a centering assembly is arranged on the machine frame, the centering assembly comprises two roller sets which are symmetrically arranged with the center line of the conveying belt as the center, each roller set comprises two supports which are arranged in a splayed mode, and the two supports are arranged on the machine frame. A row of vertically-arranged rollers are arranged on the support, supporting rods which penetrate through a gap between the conveying rollers and extend to the position below the conveying rollers are arranged on the support, a moving rod is connected between the lower ends of the two supporting rods in the same roller set, and driving assemblies used for driving the two roller sets to be close to or away from each other synchronously are arranged on the two moving rods. According to the centering device for the tires, the two splayed roller sets are symmetrically arranged on the conveying belt, the tires on the conveying belt are centered by synchronously moving the two roller sets to the center position, the centering device can adapt to tires of various specifications, and the centering device is convenient and fast to use and good in centering effect.

The invention discloses a conveying line for sliding rail machining, and relates to the technical field of sliding rail machining and transportation, the conveying line comprises an unloading frame and further comprises an auxiliary unloading device, a saw cutting machine is arranged on the left side of the unloading frame, a 48-section forming machine is arranged on the left side of the saw cutting machine, a first speed measurement induction frame is arranged on the left side of the 48-section forming machine, and a second speed measurement induction frame is arranged on the right side of the first speed measurement induction frame. A punching machine is arranged on the left side of the first speed measurement induction frame, a servo feeder is arranged on the surface of the punching machine, a punching machine guide frame is arranged on the surface of the punching machine, a second speed measurement induction frame is arranged on the left side of the punching machine, and a connecting block moves in the direction away from an extrusion rod to drive a push plate to move in the direction close to a guide rail. The push plate moves in the direction close to the guide rail, makes contact with the guide rail and conducts extrusion centering on the guide rail, it can be guaranteed that the guide rail is always kept in the center position of the conveying belt in the conveying process through extrusion centering, and therefore the discharging precision of workpieces is improved, and the accuracy of subsequent discharging is guaranteed.

The invention discloses packaging equipment capable of rapidly replacing a roll film, and relates to the technical field of packaging equipment, the packaging equipment comprises a film releasing device, a V-shaped shaping device and a packaging host, a driving motor drives rotating rings on the two sides to rotate oppositely through a bevel gear and a transmission thread, so that driving side pressing rollers on the two sides are synchronously folded towards the middle and are matched with the upper contour of a transition section; inconsistency caused by respective left and right adjustment is reduced, and the centering and adjusting efficiency of the bending surface is improved. And the upper partial pressure roller and the lower partial pressure roller vertically clamp and roll a triangular surface and form rolling support, so that a film is stressed more uniformly at a transition section, feeding is more stable, and deviation and broken line drift caused by local tension fluctuation are reduced. The driving side pressing roller is attached to the inner side of the bent face, the driven side pressing roller is attached to the outer side of the bent face, symmetrical rolling limiting and rolling clamping are formed on the bent faces on the two sides, springback, wrinkling and edge warping of the bent faces are restrained, and the convergence trend and forming consistency of the bent faces are enhanced.