FIELD: engines and pumps.
SUBSTANCE: invention relates to ship building and can be used in structures of ship propellers. A propulsion-steering column includes a column base, a spindle, a drive shaft that is located inside the spindle, a column turning mechanism, an angular gearbox, a streamlined nacelle fixed on the spindle and closing the angular gearbox. A screw propeller and a screw shaft are located inside the housing of the nacelle that adjoins the hub of the screw propeller and transmits torque moment to it. The hub is installed through bearings on the nacelle housing and provided with an end transmitting element. The transmitting element is attached both to the hub of the screw propeller and to the screw shaft.
EFFECT: improving operating reliability of a propulsion-steering column and simplifying replacement of a screw shaft.
4 cl, 2 dwg
The invention relates to shipbuilding and can be used in the construction of marine propellers, including vessel propulsion and steering columns (DRC).
Known screw propeller comprising a hub, on the outer surface of which is mounted the blades, and the propeller shaft connecting the propeller to the ship's engine (see V. P. Orekhov, B. C. Murugov "propellers controllable pitch", VINITI, Moscow, 1961, p. 53). The disadvantage of the screw propeller is the impossibility of its use in vessel propulsion and steering systems.
Closest to the claimed invention by the technical essence and the achieved result is a vessel propulsion and steering column that contains the column base, shaft, drive shaft, located inside the shaft, the steering column, the angular gear, a streamlined nacelle, mounted on the shaft and right angle gearbox, propeller and propeller shaft disposed within the housing of the nacelle adjacent to the propeller hub and sending her torque (see E. P. Lebedev, etc. "Means of active management of ships", ed. "Shipbuilding", Leningrad, 1969, p. 177, 185). The disadvantage of this DRC is the lack of reliability and the difficulty of replacement of the propeller. The fact that the blades of the propeller in the process of his work is exposed to different� unplanned factors: floating logs in the water, ice etc All they put extra force on the blades of the propeller and through them on the shaft of the screw, which is connected with a drive mechanism. Particularly acute problem when the shaft is connected to bevel gear reducer. Additional force leads to rapid wear of gears and decrease the operating life of the vessel propulsion and steering column. In addition, breakage of the blades of the propeller or loss of the screw causes the need for its replacement, which could only be exercised when setting the vessel to the dock, which is very expensive and time consuming.
The purpose of the present invention is to enhance reliability of operation of vessel propulsion and steering column and simplify replacement of the propeller.
This object is achieved in that in the known vessel propulsion and steering column that contains the column base, shaft, drive shaft, located inside the shaft, the steering column, the angular gear, a streamlined nacelle, mounted on the shaft and right angle gearbox, propeller and propeller shaft disposed within the housing of the nacelle adjacent to the propeller hub and sending her torque, it hub mounted through bearings on the housing of the nacelle end and provided with a transmitting element, bonded as with the hub and propeller shaft. End PE�edushi element can be formed as gear couplings, and between it and the end of the shaft can accommodate a damping device, wherein the outer perimeter of the hub is a continuation of the outer perimeter of the housing of the nacelle. In the proposed design of the DRC are virtually eliminated axial load on the propeller shaft. When an unplanned force action on the blades of the propeller, or on the hub, or at the transmitting end the last element is shifted along the propeller shaft, not passing it axial load. When the propeller shaft is already not impact further on the drive mechanism and the bearings in which it rotates. End, the transmitting element may be formed in various constructive versions, however, the most optimal is a toothed coupling, which transmits only the torque from the propeller shaft to the hub. When the axial displacement of the coupling she slips on the gear set, not rendering on the propeller shaft. Introduction to the design of the proposed propulsion damping device between the end of the propeller shaft and the transmitting end element absorbs vibration from propeller to propeller shaft and further to the drive mechanism, which also reduces their wear. To minimize the hydraulic resistance of the nacelle when the vessel is important to eliminate all projecting parts and recesses on the outer surface. Therefore, the outer perimeter of the hub is� a continuation of the outer perimeter of the housing of the nacelle. The proposed construction of screw propeller and allows to solve one more important problem: the relatively easy replacement of the propeller. To replace it only enough to dismantle end-transmitting element, which connects with the shaft slidably or with the clearance, and then remove the hub with blades. All can be done in terms of navigation of the vessel without installing it to the dock.
The proposed design vessel propulsion and steering column are shown in Fig.1 and 2, where Fig.1 shows a General view of the DRC, and Fig.2 - the host of the hub of the propeller on a streamlined gondola. In the figures the following expressions are used:
1 - column base;
2 - baller;
3 - drive shaft;
4 - steering column;
5 - angular reducer;
6 - streamlined nacelle;
7 - the platter;
8 - blade propeller;
9 - the hub of the propeller;
10 - place the sealing vane;
11 - the bearings of the hub;
12 - end transmitting element;
13 - shaft propeller;
14 - damping device;
15 - the case of the nacelle;
16 - the outer perimeter of the hub;
17 - perimeter enclosure of the nacelle;
18 - lubricating channels.
Vessel propulsion and steering column (Fig. 1) from the base of the stock 1 and 2, in which is located a vertical drive shaft 3 connected to the angular gear 5. Last�th is located inside a streamlined nacelle 6, where is the propeller shaft 13 connected with the propeller 7. The steering column 4 provides the rotation range of 360 degrees and locks the shaft 2 by means of the support disk 7.
The propeller (Fig. 2) includes a hub 9, on the outer surface of which is fixed to the blade 8 in the field of seal 10. The hub 9 are mounted through bearings 11 on the housing of the nacelle 15. Lubrication of the bearings 11 is made through the lubricating channels 18. The connection of the hub 9 with the shaft 13 of the propeller is carried out through the end, the transmitting element 12. In this case, it is made in the form of a gear coupling. Between the end of the shaft 13 of the propeller and shaft, the transmitting element 12 is located damping device 14. The hub 9 is mounted on the housing 15 of the nacelle so that the outer perimeter 16 of the hub was a continuation of the outer rim 17 of the hull of the gondola.
The proposed device operates as follows. Torque from a drive motor (not shown in the figures) is transmitted to the drive shaft 3, the angular gear 5 and the shaft 13 of the propeller. Further, the torque is transmitted to the transmitting end element 12 and then to the hub 9, which leads to the rotation of the blades 8 of the propeller and the creation of the stop. In off-design mode effects on the propeller and shaft, the transmitting element 12 additional efforts it is not vozdeistvuya shaft 13 of the propeller, thanks to the moving end of the transmitting element 12 along the shaft 13 via the gear set inside this element. Thus, the shaft 13 does not operate off-design axial load, which allows to increase the reliability of operation of the screw propeller or, ceteris paribus, to reduce the diameter of the shaft and to reduce the weight of the screw propeller. It should be noted that without off-design loads of the proposed technical solution eliminates the weight load on the propeller shaft. In this case, acts on the shaft but the torque and weight of the propeller does not affect the shaft and the housing of the nacelle, which provides a favorable mode of operation of the propeller shaft 13.
The placement of the hub on the housing of the nacelle allows you to provide a relatively simple and Assembly-disassembly of the propeller with the purpose of its replacement without installing the vessel in dock, which reduces the cost of operation of vessel propulsion and steering column and vessel in General.
1. Vessel propulsion and steering column that contains the column base, shaft, drive shaft, located inside the shaft, the steering column, the angular gear, a streamlined nacelle, mounted on the shaft and right angle gearbox, propeller and propeller shaft located inside the housing of the nacelle adjacent to the propeller hub and sending her torque, characterized in that the hub set h�rubber bearings on the housing of the nacelle end and provided with a transmitting element, bonded both with the propeller hub and the propeller shaft.
2. Vessel propulsion and steering column according to claim 1, characterized in that the end, the transmitting element is designed as gear couplings, transmitting only torque.
3. Vessel propulsion and steering column according to claim 1, characterized in that between the transmitting end member and the end of the shaft is placed a damping device.
4. Vessel propulsion and steering column to claim 1, characterized in that the outer perimeter of the hub is a continuation of the outer perimeter of the housing of the nacelle.
SUBSTANCE: invention relates to ship building, particularly, to outboard propulsors. Proposed arrangement comprises the following components: thermal engine, first shaft, variator, second shaft coupled with screw propeller and control system. Variator incorporates unipolar generator fitted on first shaft and electrically connected with unipolar generator fitted on second shaft. Said shaft have no mechanical engagement and support first and second rpm transducers. Control system is connected with thermal engine rpm control unit, rpm transducers and excitation windings of unipolar motor and unipolar generator.
EFFECT: higher reliability, decreased weight and overall dimensions, lower level of interferences at power conversion.
7 cl, 3 dwg
SUBSTANCE: invention relates to ship building and may be used in auxiliary propeller structures. auxiliary propulsion system of waterborne vehicle consist of propeller, system of its extension from waterborne vehicle body and shield-recess which is provided with additional extension system kinematically connected with this shield and located inside waterborne vehicle body.
EFFECT: implementation of invention permits to lower hydraulic resistance of auxiliary propulsion system and to increase its overall thrust.
SUBSTANCE: propeller screw assembly comprises two propeller screws running in opposite directions. One propeller screw features smaller diameter but runs at higher angular velocity and has larger number of blades.
EFFECT: higher efficiency, lower noise.
FIELD: water transport facilities.
SUBSTANCE: proposed sea-going ice-breaking transport vessel has hull with keel, forecastle with deck house, fore pointed extremity, aft convex cochleariform lines, aft deck and propulsion-and-steering gears. Hull is additionally provided with flat bulb considerably projecting beyond fore perpendicular. Fore lines are made with U-shaped frames over entire height of side including forecastle superstructure with streamlined deck house; keel is rising in sternpost area; when it is stowed, its lower aft wedge-shaped edge projects beyond sternpost line. Aft cochleariform lines form section of deck which is oval in plan with transom inclined at angle of 45 deg. In underwater portion, lines smoothly change into side bulges-sponsons provided with passageways with longitudinal slots in their bottom part for motion of propulsion-and-steering gears over them. Side bulges-sponsons terminate in falling-out side on external side and falling-home side in their fore part so that line of maximum breadths in this area directed upward and sternward should cross the waterline at angle of 3-6 deg. Extreme breadth of hull over bulges-sponsons in the waterline area exceeds midship breadth. Bottom part of passageway has horizontal or slightly deadrise surface in cross-sections which passes to stern at angle of 1-3 deg. relative to waterline and extends to deck at angle of 45 deg. On both sides of its oval section made in form of shoulder perpendicular to hull CL. Propulsion-and-steering gear includes two all-moving struts with nacelles located in aft section of ship, motors in nacelles for rotating the propellers and load-bearing service lines running to struts from power module of vessel. Struts with nacelles are located on both parts of stern in bulges-sponsons. Each strut with nacelle has streamlined guide stud in form of spherical segment with base directed upward which is equipped with circular thrust sliding bearing over its perimeter; each strut has vertical shaft which is coaxial with segment and is rotated by motor in radial-thrust bearing of carriage located in passageway of bulge-sponson and driven by means of load-bearing service lines on four bevel gear wheels connected in pairs by means of transversal hydraulic cylinders of carriage and driven by hydraulic motors built in them; hydraulic motors are thrown into engagement with inclined toothed racks laid on either side from slot in bottom part of passageway. Width of this slot is equal to diameter of vertical shaft.
EFFECT: enhanced ice passability of vessel.
3 cl, 7 dwg
SUBSTANCE: propeller contains flat surface (13.2) which passes along blade rear surface (13) and has width equal to 1/3 of blade width (13), rear radiused surface (13.1) which crosses the flat surface (13.2) and has radius R which is equal to 2/3 of rear surface width thus complementing the remaining part of rear surface. On free end of rear surface radius (13.1), contact surface (13.3) with radius of 1.5 R crosses propeller rotation plane, so that the contact surface forms angle of 3-9 degrees. The radiused surface (13.4) of outlet edge with radius of 0.5 R crosses surface located below half-thickness of blade edge of the mentioned inner contact surface(13.3) and flat surface (13.2), and is curved in direction opposite to inner contact surface (13.3). Distance from point of intersection of the mentioned radiused surfaces (13.1, 13.3) which have radii of R and1.5 R to surface where rear flat surface is located (13.2) is equal to 1/4 and 1/5 of rear surface projection width. Diameter F of rear surface (13.7) of blade (13) is within diameter value range of R400 to R650.
EFFECT: increased energy efficiency.
3 cl, 5 dwg, 1 tbl
SUBSTANCE: proposed vehicle comprises body, head, propulsor and steering complex. Hollow cylindrical screw jacket is arranged around the periphery of the body to spin there about and around its axis. Said jacket has outer laps as screw blades over the entire length of screw jacket. It is composed by three or more rectangular equal-width equal-length strips concaved or convexed relative to screw jacket rotational axis. Said strips are coiled in vertical plane in lengthwise direction and flexed in screw lines across cylindrical mandrel. Or, said screw jacket can be composed by three or more screw strips, curvilinear of various order and degree of curvature at centres located outside or inside screw jacket cross-section. Said strips are interconnected to make laps as screw blades over the entire length of screw jacket, screw lines and screw curvilinear surfaces as helical grooves concaved or convexed relative to screw jacket rotational axis with curvature centres located outside or inside screw jacket cross-section.
EFFECT: enhanced operating performances.
SUBSTANCE: vehicle comprises hull with two rows of working wells, propulsor, deckhouse and steering complex. Hollow conical screw jacket is arranged around the periphery of the body to spin there about and around its axis It is composed by curvilinear strips of various order and degree of curvature. Centres of curvature are located inside or outside jacket cross-section to make along its periphery the multistart screw surface with screw lines and helical grooves. These are inclined relative to rotational axis inside said hollow conical screw jacket. Strips feature different width increasing over jacket length from inlet to outlet. Said strips are coiled in vertical plane in lengthwise direction and flexed in screw lines across mandrel composed by paraboloid of revolution. Said jacket has outer laps as screw blades over the entire length of screw jacket.
EFFECT: enhanced operating performances.
SUBSTANCE: blade tip made as and winglet represents blade profile divided into upper and lower parts. Each part of end winglet can have fixed or adjustable angle of attack independent from angle of attack of the other part.
EFFECT: lower power losses of propeller drive, improved blade aerodynamics, increased lifting and pulling force and propeller efficiency.
SUBSTANCE: vessel aft end includes hull with above-water portion. The above-water portion has deck, steering room with steering engine and underwater portion. Propulsor is made as crawler consisting of driving and driven sprockets and shaped plates with projecting flanges. Shaped plates have the shape of paddle blades. Underwater portion of hull has projection with guides for shaped plates movement and cavities for sprockets. Rudder post is installed with rest on projection.
EFFECT: increased draught of propulsor.
2 cl, 5 dwg
SUBSTANCE: vessel propeller screw contains hub with blades placed on propeller shaft. The blades are mutually equally spaced and placed at an angle to shaft longitudinal axis. Each blade is provided with at least one flow diverter which is located on concave/convex side of a blade at an angle to its radial axis. Flow diverter size is increasing in water flow movement direction.
EFFECT: increased thrust of propeller screw.
FIELD: process engineering.
SUBSTANCE: invention relates to ship building, particularly, to icebreaker screw propeller blades incorporated with rudder propellers. Icebreaker propeller screw blade features smooth curvilinear surface and bulge in the area of leading edge. Said bulge is located within 0.35-0.85 of propeller screw radius. Blade profile depth at 0.025 of profile chord length from said leading edge makes 0.25-0.47 of the profile maximum depth. At said distance from leading edge, profile relative depth increases as spacing from propeller screw rotational axis increases. Blade profile depth at 0.05 of profile chord length from said leading edge makes 0.3-0.75 of the profile maximum depth. Blade profile depth at 0.75 of profile chord length from said leading edge makes 0.6-0.7 of the profile maximum depth.
EFFECT: higher efficiency in ice conditions.
FIELD: engines and pumps.
SUBSTANCE: hydrojet propelling agent is designed to drive high-speed vessels, ships, boats. A hydrojet propelling agent comprises a cylindrical hub with blades on it having inlet and outlet sections and a fixed cylindrical attachment. In the attachment there are fixed blades. At the inlet to the attachment the blades have axial direction in the area of blades of the hydrojet impeller - direction opposite to the blades, and at the outlet downstream the impeller they smoothly change into axial direction.
EFFECT: invention provides for higher thrust of a propelling agent and utility factor, increased stability of operation in case of air ingress and in cavitation modes.
SUBSTANCE: screw propeller comprises hub. Screw propeller allows purposeful variation of fluid parameters at blade suction and pressure surfaces. Said hub is composed of the barrel with blades secured at its inner surface. Hub walls have rows of through holes regularly made over hub perimeter at both blade suction surface and pressure surfaces. Rows of through holes on said suction and pressure surfaces are separated and communicated with separate compressed gas sources. Drive shaft is hollow and fitted in fixed sleeve to run therein, circular groove is made on the side of said sleeve facing the hub bottom part, groove bottom is connected via hole with opposite side of said fixed sleeve. Outer surface of second sleeve is aligned with circular groove nearby drive rotational axis to make cylindrical circular groove with chamber side surface facing the latter. Circular cylindrical groove section remote from fixed sleeve is connected with clearance between second sleeve end and hub bottom part. Drive shaft cavity is connected with compressed gas first source while its end if covered by first check valve and opening in fixed sleeve is connected with compressed gas second source and closed by second check valve.
EFFECT: simplified design, enhanced performances.
2 cl, 4 dwg
SUBSTANCE: water-jet propeller comprises working wheel with cylindrical hub with constant or variable pitch blades with leading and trailing edges fitted in cylindrical adapter. Diameter of working wheel blades at inlet is larger than that at outlet to make frontal area is smaller than that at inlet by 1.5-2 times. Said case accommodates fixed blades of opposite direction relative to blade profile direction. Height of blades varies along the flow from minimum to maximum to make constant clearance with working wheel blades. Blades are smoothly curved to axial direction at outlet.
EFFECT: higher thrust and efficiency, better stability under cavitation.
FIELD: propulsors for water and ground transport facilities which are provided with rotating blades performing circular motion but remaining parallel.
SUBSTANCE: propulsor has two wheels of similar diameter at parallel pivot axles mounted at distance which is lesser than diameter of any wheel; blades are located between wheels and are connected with them by means of additional pivot axles.
EFFECT: simplified construction and enhanced operational efficiency.