499results about How to "Reduce contact area" patented technology

The composite non-woven fabric comprises an upper-layer non-woven fabric body and a lower-layer non-woven fabric body, the composite non-woven fabric body is provided with a protruding area and a micro-embossment area, and protrusions of the protruding area are provided with inner spaces located between the upper-layer non-woven fabric body and the lower-layer non-woven fabric body. The micro-relief area is located on the composite part where the upper-layer non-woven fabric and the lower-layer non-woven fabric make contact with each other and provided with concave-convex textures. The concave-convex textures of the micro-embossment area of the composite non-woven fabric are achieved through mutual extrusion of the concave-convex texture structure on the composite roller and the protrusions of the embossing convex roller in the composite process, the local pressure of the composite part can be increased, firm bonding between fibers is promoted, and therefore the bonding force of the upper-layer non-woven fabric and the lower-layer non-woven fabric is improved; the production speed and efficiency are greatly improved, and the problem that the overall soft hand feeling of the composite non-woven fabric is affected due to the fact that the composite part of an existing composite non-woven fabric is stiff and hardened is effectively solved.

The invention discloses an anti-deformation high-strength inspection well prefabricating mold which comprises a base, an outer mold assembly is slidably mounted on a top plate of the base, an inner mold assembly is mounted at the position, in the center of the outer mold assembly, of the base, a demolding assembly is mounted in the inner mold assembly, sliding assemblies are mounted on the two sides of the bottom of the outer mold assembly, and sliding ways are mounted at the positions, corresponding to the sliding assemblies, of the base. The sliding assembly is slidably arranged on the slide way. Through the longitudinal reinforcing ribs and the transverse reinforcing ribs, a stable net-shaped reinforcing structure is formed, side pressure generated on the arc-shaped outer formwork in the concrete pouring process can be effectively dispersed, damage such as bending, deformation and cracking caused by uneven stress of the arc-shaped outer formwork is avoided, the structural stability and deformation resistance of the mold are remarkably improved, and the service life of the mold is prolonged. The reinforcing rib forming grooves which are perpendicularly crossed are formed in the inner side wall of the arc-shaped outer formwork, corresponding outer wall reinforcing ribs can be formed on the outer wall of the inspection well during concrete pouring, and the structural strength of the formed inspection well is effectively enhanced.

The utility model discloses a corrosion-resistant high-pressure fire extinguisher valve structure which comprises a valve body, a nozzle communicated with the inside of the valve body is arranged on the side wall of the valve body, the lower end of the valve body is detachably connected with a vertical pipe seat, a handle is arranged at the upper end of the valve body, a convex ring is arranged on the outer side wall of the valve body and located between the handle and the vertical pipe seat, and the top of the convex ring is close to the handle. The bottom of the convex ring is far away from the handle, the valve body is sleeved with an O-shaped ring, the O-shaped ring is located at the bottom of the convex ring, the part, located at the bottom of the convex ring, of the valve body is wedge-shaped and sleeved with the O-shaped ring, the inner side of the convex ring is fixedly connected with the valve body, the outer side of the convex ring is provided with a plurality of L-shaped locking blocks, and the locking blocks are evenly distributed in the circumferential direction of the convex ring. One side of the locking block is in damping sliding connection with the protruding ring in the radial direction of the protruding ring, the magnetizer and the pull ring are fixed to the other side of the locking block, the magnetizer is located on one side of the locking block and forms a U-shaped structure together with the locking block, and the pull ring is located on the other corresponding side of the locking block. The utility model has the beneficial effect that the valve body is convenient to disassemble.

This invention belongs to the field of iron and steel smelting technology, and particularly relates to a protective device and manufacturing method for a converter movable fume hood lifting lug. It includes lifting lugs and a movable fume hood. The lifting lugs are welded to the movable fume hood. A protective cover with an internal interlayer, matching the outer contour of the lifting lug, is hung on the outside of the lifting lug. The two sides of the interlayer of the protective cover are connected by ribs. Several V-shaped anchoring nails are welded to the interlayer wall of the protective cover. Refractory grout is filled into the interlayer of the protective cover. Asbestos is laid between the protective cover and the lifting lug. One end of the protective cover is welded to the movable fume hood. Several round rod hanging lugs are welded to both sides of the protective cover, and the upper ends of the round rod hanging lugs are hung on the lifting lugs. This invention isolates the lifting lug from the heat source through the protective cover, preventing the lifting lug from being burned. While the protective cover is fixed to the lifting lug and the movable fume hood, it reduces the contact area, thereby reducing heat transfer.

The utility model discloses a woven bag reversing conveying device based on a conveying belt, which comprises a conveyor, a frame body is arranged at one end of the conveyor, roller bodies are rotatably connected to two sides in the frame body, a first motor is fixed on the frame body, a power output shaft of the first motor is fixedly connected with one of the first motors, and a power output shaft of the first motor is fixedly connected with the other of the first motors. The two roller bodies are connected through a plurality of belts, one side of the frame body is rotationally connected with a rotating roller, the conveying device further comprises a second motor, the driving end of the second motor is fixedly connected with the rotating roller, and a swing downward pressing device matched with the rotating roller in position is fixed to a rack of the conveyor. The swing pressing device is used for being matched with the rotating roller to clamp the woven bag so as to convey the woven bag to the conveyor. The second motor can drive the rotating roller to rotate, after the swing pressing device is matched with the rotating roller, a woven bag can be clamped so as to be conveyed to a conveyor from a belt, and reversing operation of the belt is completed.

This utility model relates to the field of conveying device technology, specifically to a non-powered conveyor frame for rolling mill billets, including a milling mill discharge roller conveyor and a rolling mill feed roller conveyor. Multiple rollers are installed between the milling mill discharge roller conveyor and the rolling mill feed roller conveyor. Each roller has an anti-collision component installed at one end near the milling mill discharge roller conveyor, and the other end is rotatably connected to the rolling mill feed roller conveyor. An elastic reset component is installed inside each anti-collision component and between it and the roller. When the billet bends during conveying on the milling mill discharge roller conveyor, it first contacts the anti-collision component. The anti-collision component, in conjunction with the elastic reset component, pushes the bent portion of the billet back onto the milling mill discharge roller conveyor to prevent damage to the roller. Simultaneously, the roller-type conveyor frame has a smooth surface, a small contact area with the copper pipe, eliminates the need for nylon sheets or similar materials, provides minimal resistance, and can adapt to any height difference.

The utility model discloses a kind of car sunroof guide rails with buffering noise reduction structure, it is related to sunroof guide rail field, this kind of car sunroof guide rail with buffering noise reduction structure includes the guide rail main body extending along first direction, outwardly extending mounting plate is formed on the guide rail main body one side outer wall, multiple mounting holes are opened on mounting plate, for bolt connection frame, bolt is passed in mounting hole when connecting;This kind of car sunroof guide rail with buffering noise reduction structure forms three-dimensional grid structure by buffer groove and extension groove, main rubber pad absorbs vertical impact, extension rubber pad inhibits longitudinal vibration, double elastic deformation greatly reduces the area of mounting plate contact part after installation with frame, blocks vibration transmission path, rubber ring in the protruding part groove isolates bolt and mounting plate metal contact, eliminates high-frequency friction abnormal sound.

The present application relates to the technical field of agricultural product processing machinery, and discloses a layered and unfolded bearing device for high-temperature steam sterilization of organic white melon seeds, which comprises a device main body connected with a high-temperature steam supply device, and a plurality of layered bearing and conveying assemblies horizontally arranged in the device main body, the layered bearing and conveying assemblies being staggered in the vertical direction, and the discharge end of a preceding layered bearing and conveying assembly being located above the feeding end of a subsequent layered bearing and conveying assembly; the bearing and conveying assembly is provided with a gas-permeable bearing member, the gas-permeable bearing member is provided with steam-permeable holes, and the cross section of the gas-permeable bearing member is in a continuous undulating structure; and a dispersion assembly is arranged between the discharge end of the bearing and conveying assembly and the feeding end of the subsequent layered bearing and conveying assembly, and is used for dispersing the white melon seed materials falling between the layers. The present application ensures that the front and back surfaces of each white melon seed can be uniformly heated by high-temperature steam in the multi-layered and alternating conveying, eliminates the dead angle of material accumulation, and solves the problem of uneven heating caused by single-sided continuous heating.

The utility model relates to the field of LED substrate processing discloses LED substrate heat conducting silicone grease fixture, including fixed frame, the fixed frame is located the top surface of base, the inside fixed installation board of fixed frame, the top surface of installation board is equipped with two fixed holes, the inside fixed metal round plate of fixed hole, the top surface of metal round plate is equipped with a plurality of smearing holes, the top surface of base is detachably provided with the placing plate, the top surface of placing plate is equipped with two containing grooves. In the utility model, scrape the heat conducting silicone grease on the metal round plate, the heat conducting silicone grease will be filled into the inside of smearing hole, through the limitation of smearing hole inside space, can accurately control the amount of heat conducting silicone grease every time smearing, thereby ensuring the consistency of smearing thickness.

The present application relates to the technical field of edible salt, and particularly relates to a green edible salt production process. Technical problems are as follows: the existing technology causes the caking problem of edible salt in the production, transportation, storage and use process due to the zero addition of anti-caking agent. A technical solution is as follows: a green edible salt production process comprises the following steps: A: secondary cooling of finished salt before packaging; the finished salt is sent into a secondary cooler after coming out of a self-made salt device dryer, and the temperature of the finished salt is reduced to close to room temperature through circulating desalted water; B: screening of the finished salt particles cooled in step A, and selection of the oversize material with relatively large particle size and not easy to caking; C: addition of iodine agent into the finished salt cooled and screened in step B; D: storage of the finished salt in step C for a period of time before packaging; E: packaging by using a packaging material with strong blocking property and good sealing performance.

The utility model provides a flue hanging hole three-dimensional plugging device, which belongs to the technical field of building construction and comprises a pre-buried frame, a first fixing block and a second fixing block, the first fixing block and the second fixing block are arranged on the pre-buried frame, a pressing strip is arranged on the side wall of the pre-buried frame, and the first fixing block is fixedly connected to the inner wall of one side of the pre-buried frame. A first positioning groove is formed in one end of the first fixing block, and a shaft groove is formed in one side of the first fixing block. According to the embedded box, the two mutually-spliced embedded frames are combined into the whole embedded box, the contact area of the single embedded frame and concrete is reduced when the single embedded frame is subjected to mold removal, meanwhile, friction force is correspondingly reduced instead of overall large friction force, and therefore the mold removal efficiency is improved, after the embedded frame is divided into the two parts, stress is dispersed, the embedded frame can be more evenly and controllably removed, and the mold removal efficiency is improved. The damage risk of the embedded frame and the concrete structure is reduced, meanwhile, the positioning assemblies arranged between the embedded boxes can guarantee the strength of the embedded frame after assembly, later disassembly is facilitated, and the overall disassembly and assembly efficiency is improved.

In order to overcome the problems of insufficient ion conduction efficiency and interface side reaction between the existing sulfide solid electrolyte and a positive electrode, the invention provides a solid-state battery and a preparation method thereof, and the solid-state battery comprises a positive electrode plate and a negative electrode assembly which are stacked in sequence, the positive plate comprises a positive current collector and a positive material layer arranged on the surface of the positive current collector, the negative assembly comprises a negative plate, a sulfide electrolyte layer and a polymer electrolyte layer, the sulfide electrolyte layer is located on the surface of the negative plate, and the polymer electrolyte layer is located on the surface of the sulfide electrolyte layer. A corrugated groove is formed in the surface, deviating from the negative plate, of the sulfide electrolyte layer, the polymer electrolyte layer is located in the corrugated groove, and the polymer electrolyte layer abuts against the positive electrode material layer and partially permeates into the positive electrode material layer.

The utility model relates to the technical field of water and electricity construction, especially relates to a water and electricity warm reservation hole construction device, including the pouring form, the right side surface of pouring form is set up with the reserved hole, be provided with the filler piece in the reserved hole, the side of the filler piece is provided with screw thread, the surface screw thread connection of screw thread has the thread sleeve, be provided with screw rod in the thread sleeve, the surface sliding connection of screw rod has the first abutment, the left side surface of first abutment is butt joint in the right side surface of thread sleeve, the surface screw thread connection of screw rod has the nut, the left side surface of nut is butt joint in the right side surface of first abutment, the surface sliding connection of screw rod has the second abutment, the utility model discloses through.

The utility model discloses a kind of feeding and discharging mechanism of PCB detection equipment, including the conveyor belt body and material limiting assembly for PCB detection equipment;Material limiting assembly is arranged on conveyor belt body;Material limiting assembly includes the material limiting plate for limiting PCB board horizontal direction, the material limiting plate for limiting PCB board vertical direction, guide slot and guide block;Two material limiting plates are symmetrically fixed on the both sides of conveyor belt body;Several material limiting plates are linear array between two material limiting plates and are rotatably connected with two material limiting plates by rotating shaft A, and material limiting plate is contacted with PCB board;Several guide slots are linear array and are opened on the opposite surface of two material limiting plates;Two guide blocks are symmetrically fixed on the both sides of material limiting plate, and guide block and guide slot are slidingly fitted, the feeding and discharging mechanism of this PCB detection equipment, simple and reasonable structure, ingenious design, in the feeding process, not only PCB board horizontal direction can be limited, but also PCB board vertical direction can be limited, greatly reduce use cost.

The application discloses a super-hydrophobic polypropylene plastic composite material and a preparation method thereof, and relates to the technical field of high-performance polypropylene. The method comprises the following steps: dispersing and embedding hydrophobic modified nano silicon dioxide in a low-molecular-weight polymer wax matrix to prepare composite microspheres; grafting polydimethylsiloxane to polypropylene molecular chains to prepare polydimethylsiloxane grafted modified low-surface-energy master batches; performing surface hydrophobic modification treatment on natural tubular silicate minerals to prepare hydrophobic modified nanotubes; and melt blending polypropylene matrix resin, the composite microspheres, the low-surface-energy master batches, the hydrophobic modified nanotubes and processing aids, and then performing cooling solidification and molding to obtain the super-hydrophobic polypropylene composite material. The polypropylene plastic composite material prepared by the application has excellent super-hydrophobic performance.

This disclosure provides a photodetector. The detector includes a substrate and, sequentially stacked on the substrate surface, an N-type doped layer, an absorption region, a P-type doped layer, and a converging structure. The first cross-sectional area of ​​the absorption region along the direction parallel to the substrate surface is smaller than the second cross-sectional area of ​​the P-type doped layer parallel to the substrate surface; the surface of the P-type doped layer away from the absorption region is a photosensitive surface. The converging structure is used to focus incident light from the photosensitive surface to the absorption region, so that the photodetector converts the incident light into an electrical signal. This detector can simultaneously achieve high responsivity and high bandwidth.

The utility model relates to the technical field of carrier tape manufacturing, and discloses a track supporting mechanism in a COF (chip on film) carrier tape baking oven, which comprises a plurality of groups of supporting jigs uniformly distributed along the length direction of a second layer track, and the supporting jigs comprise main body bases symmetrically arranged on two sides of the track. One end of the main body base is provided with a first connecting table matched with the upper end of a track, the other end of the main body base is connected with a bearing shaft wheel used for supporting a carrier tape, the bearing shaft wheel is connected with the main body base through a second connecting table, a mounting groove is formed in the end, away from the main body base, of the second connecting table, and a plug pin is arranged in the mounting groove in a matched mode; the bearing shaft wheel is arranged on the plug pin in a sleeving mode and fixed to the second connecting table. The supporting jig is arranged on the conveying track, so that the COF carrier tape is further supported, the levelness of the carrier tape is guaranteed, and the phenomenon that the carrier tape is separated from the track due to the fact that the bending degree of the carrier tape is increased when the carrier tape passes through the second layer of the track is avoided.

The utility model discloses embroidery cloth, which relates to the field of fabrics, and is characterized in that the embroidery cloth comprises base cloth, the base cloth comprises a half-ridge weaving part and a weft plain stitch part, a groove is formed on the inner side of the base cloth, the weft plain stitch part comprises a mounting area and a breathable area, the mounting area is formed by weaving polyester dyed yarns, and reinforcing yarns are added on the mounting area; the breathable area is formed by weaving polyester yarn, and a plurality of through holes are formed in the breathable area in a weaving mode. The floating threads, located on the inner side of the base cloth, of the sewing yarn are contained in the grooves, the influence of the sewing yarn on the softness of the inner side of the base cloth is reduced, reinforcing yarn is arranged on the installation area, so that the knitting density of the installation area is high, the sewing strength of the sewing yarn can be guaranteed, through holes are formed in the breathable area, and a gap is formed between the breathable area and the skin; the breathable area is arranged, so that internal and external air can be interacted through the breathable area, the overall breathability of the base cloth is guaranteed, the polyester yarns have the characteristic of high strength, and the overall strength of the base cloth is guaranteed.

The utility model discloses a novel roll bending inner chamber filling structure relates to the field of roll -in technology, including device platform, the device platform upper surface is established with the mounting groove, the inboard of mounting groove is provided with filling assembly and pull assembly respectively, the filling assembly is including fixed base, the fixed base upper end fixedly connected with the filling groove, the filling groove lower surface fixedly connected with spring box and is provided with the through groove with spring box upper surface through -setting, the utility model discloses the filling assembly of setting, pull rod and draw a rope realize soft and hard link, thereby realize the matching of product and draw a rope, and the middle position of core mould increases a limit ring and product inner width surface effective flow contact, has reduced product and the cooperation clearance and contact area of filling, has effectively solved the problem of filling local deviation, has effectively improved the work efficiency of filling, has improved practicality.

This invention discloses a hard carbon material with ultra-high platform capacity, its preparation method, and its applications. The hard carbon material is prepared by hydrothermal reaction and high-temperature carbonization, with a particle size of 2-4 μm, a pore size of 0.4-200 nm, and a specific surface area of ​​no more than 15 m². 2 / g, with a platform capacity ratio of not less than 40%; the preparation method of hard carbon material is as follows: S1: Add surfactant to pectin aqueous solution for hydrothermal reaction, and obtain hard carbon microspheres after filtration and drying; S2: Carbonize the hard carbon microspheres of S1 at high temperature under an inert atmosphere, and obtain hard carbon material with ultra-high platform capacity after cooling. The hard carbon material of the present invention can be used as a negative electrode material for lithium-ion batteries, which can significantly improve the platform capacity ratio.

The utility model belongs to the technical field of LED lighting, specifically a kind of frameless panel lamp for label backlight, including frame, backplate, light guide plate and diffusion plate, frame is provided with two groups of relative arrangement, the side surface of two groups of frame mutually close is provided with mounting groove along the length direction of itself, the groove bottom of mounting groove is provided with light bar, backplate, light guide plate and diffusion plate are sequentially abutment settings, and backplate and diffusion plate are respectively with the two side walls of mounting groove along the length direction of itself abutment, frame is provided with inclined plane at the mounting groove slot edge, inclined plane is arranged in the side close to diffusion plate, and from the direction of mounting groove slot, the cross-sectional area of frame close to the side of mounting groove slot is less than the cross-sectional area of the side close to the groove bottom of mounting groove. The design of the present application through inclined plane reaches the effect of frameless, need not be slotted design in the side edge of diffusion plate, reduce the thickness of diffusion plate, can also enhance the luminous effect of panel lamp.

The utility model discloses a sliding structure capable of running smoothly, which belongs to the technical field of automobile accessories and comprises a sliding groove, a sliding channel arranged along the length direction of the sliding groove is arranged in the sliding groove, a sliding seat and a screw rod for driving the sliding seat to translate along the sliding channel are arranged in the sliding channel, the top surface of the sliding seat is connected with a cantilever, and the cantilever is connected with the sliding groove. A guide rail is arranged on the inner wall of the sliding groove, a groove is formed in the sliding base, and the guide rail extends into the groove. According to the sliding structure which runs smoothly, the original large cylindrical sliding contact surface is changed into a small-area contact form that the sliding chute is matched with the sliding seat, so that the friction coefficient is greatly reduced.

The invention discloses a steering wheel damping device and a steering wheel damping system, and relates to the technical field of automobile steering wheels. The steering wheel damping device comprises a guide assembly and an elastic piece. The guide assembly comprises a guide piece; the guide piece comprises an annular supporting part abutting against one end of the spring element and a plurality of guide arms which are arranged on the annular supporting part at intervals in the circumferential direction and extend into the mounting hole in the axial direction. When the steering wheel pressing castanet is in a non-stress state, at least part of the guide arms abut against the connecting piece, and elastic deformation occurs under the condition that radial driving force is applied to the guide arms. According to the embodiment, the abutting area between the inner side of the guiding piece and the connecting piece can be reduced, the collision strength between the inner side of the guiding piece and the connecting piece is relieved, and then noise is reduced.

The application discloses a high-pressure sealed electronic oil pump convenient to install and a method, which comprises an electronic oil pump body, a connecting pipe joint inserted into the top of the electronic oil pump body, and a positioning structure arranged on the top of the electronic oil pump body and located on the inner side of the connecting pipe joint. The connecting pipe joint is inserted into the top of the electronic oil pump body, and the connecting pipe joint needs to be located on the inner side of the supporting plate. Then, a user pushes a transmission plate, the transmission plate is extruded and drives a clamping plate to rotate around the pin shaft on the surface of the connecting block. When the outer side of the clamping plate is in contact with the surface of the connecting pipe joint and the connecting pipe joint is tightly extruded on the surface of the supporting plate, the effect of stably installing and fixing the connecting pipe joint is achieved. The application can improve the connection mode of the existing electronic oil pump and the hose, and assists in connecting through the plug-in mode, prevents the hose from being loosened due to vibration, and avoids oil leakage.

The invention discloses a mahjong machine tile storage assembly and a mahjong machine, the tile storage assembly comprises a tile storage base, a closed or non-closed path is formed on the tile storage base, and a bottom support is arranged on the path; a card inlet and a card outlet which are located in different positions of the path are further formed in the card storage base, the bottom support located between the card inlet and the card outlet is used for storing cards, and the bottom support is driven by the driving unit to move between the card inlet and the card outlet along the path. A path extends out of the tile storage channel, when the bottom support moves along the path, the moving bottom support can take away tile piers one by one, the tile piers are prevented from being stacked at the tile inlet, and the tile pushing pressure of an upstream stacking and pushing assembly is relieved; the tile piers and the bottom support are basically in a relatively static state, so that the movement of the bottom support is not influenced no matter the mahjong tiles are clean or stained, and resistance is not additionally increased; during mahjong tile feeding, the moving bottom support can apply thrust to the mahjong tile queue from the bottom, and mahjong tile feeding resistance of the mahjong tile feeding assembly can be reduced.

The utility model discloses an intelligent sensor's aluminium oxide base processing device related to sensor preparation technical field, and the middle part of sintering furnace inner chamber is equipped with the baffle, and the sintering furnace inner chamber is separated by left and right and is divided into a plurality of sintering cavities by the baffle, and a plurality of silicon molybdenum heating rods that are arranged on the inner wall of sintering cavity are arranged from top to bottom in the sintering cavity, and the sintering cavity is also equipped with the material frame for placing aluminium oxide base, and the material frame includes pivot, material tray, base and drive walking mechanism, and the pivot that is perpendicular to the base is rotatively driven and installed on the upper portion of base, and a plurality of material trays that are arranged along the pivot axial direction are arranged on the pivot axle body, and a plurality of installation grooves that are arranged in order and are used for vertically clamping and placing aluminium oxide base are arranged on the upper surface of material tray, and the bottom of base is equipped with drive walking mechanism, and the utility model not only can fully and evenly sinter and heat aluminium oxide base, but also can effectively reduce the deformation, warping or cracking of aluminium oxide base during the sintering process.

The utility model discloses a high sharpness injection needle, including needle tube and needle tip, the needle tip adopts three -stage tapering type multi -edge surface structure, and this three -stage tapering type multi -edge surface structure is composed of main cutting part, transition part and micro blade part, the main cutting part includes three symmetrical distribution's first inclined plane, and every first inclined plane bifurcates two second inclined planes to form transition part, and every second inclined plane bifurcates two third inclined planes to form micro blade part, the needle tip surface is equipped with a plurality of micro -groove, and the third inclined plane intersection of on micro blade part forms nanometer -class blade edge, and this blade edge edge is equipped with periodic micro sawtooth. The utility model discloses a needle tip is three -stage tapering type multi -edge surface structure, and the puncture resistance is reduced in stages, and the pain feeling is reduced, sets up micro sawtooth and can reduce the tissue contact area through " point cutting", and the local stress concentration when puncturing, and then delay passivation, sets up micro -groove and can guide the tissue fluid flow, destroys the negative pressure adsorption effect, and improves the needle insertion smoothness.

A crankshaft in the compressor comprises a long shaft part, an eccentric part and a short shaft part which are sequentially arranged in the axial direction, the shaft diameter of the long shaft part is r1, the shaft diameter of the short shaft part is r2, r1 is larger than or equal to 18 mm and smaller than or equal to 20 mm, and r2 is larger than or equal to 16 mm and smaller than or equal to 18 mm. By reducing the shaft diameters of the long and short shafts of the crankshaft, the contact area between the crankshaft and the upper and lower bearings is reduced, the contact friction between the crankshaft and the upper and lower bearings is reduced, the mechanical loss of the compressor can be reduced, the working efficiency of the compressor is improved, and the performance of the compressor is improved.

The utility model discloses a dust falling device for an organic fertilizer production workshop, which comprises a structural box, a supporting plate is arranged on one side of the structural box, two first sleeve plates are fixedly connected to one end, close to the structural box, of the bottom of the supporting plate, first guide rods are arranged on the two first sleeve plates in a penetrating manner, and the first guide rods are fixedly connected with the structural box. The top of the supporting plate is fixedly connected with two positioning rods, the top of the supporting plate is provided with a spraying mechanism, one side of the supporting plate is fixedly connected with an L-shaped plate, one side of the L-shaped plate is fixedly connected with an inserting rod, one side of the structural box is provided with a fixing plate, and the side, close to the L-shaped plate, of the fixing plate is provided with an inserting groove matched with the inserting rod. Handles are arranged on the supporting plate and the fixing plate, and a connecting rod is fixedly connected to the side, close to the structural box, of the fixing plate. The cleaning device is easy to operate, the fixing cylinder and the brush are convenient to mount and dismount, time and energy required by mounting and dismounting are reduced, and the difficulty of cleaning dust on the brush is reduced.

This invention discloses an eccentric sleeve and a scroll compressor. The eccentric sleeve includes a shaft portion and an edge portion. The edge portion includes a front end edge and a rear end edge disposed radially on the shaft portion. The edge portion is formed by the front end edge extending around the edge of the shaft portion towards the rear end edge. The front end edge and / or the rear end edge are at least partially tangential. By implementing this invention, the front end edge and rear end edge are designed with tangential structures. When the eccentric sleeve rotates, the tangential structures of the front end edge and rear end edge cause them to be tangential to the refrigerant oil. The small contact area between the front end edge and the refrigerant oil greatly reduces the agitation of the refrigerant oil, reduces the generation of eddies, lowers the compressor's power consumption, and thus improves the compressor's energy efficiency.