The device in the capsule generator
(57) Abstract:Capsule generator includes a housing, located in the stream of water passing of the turbine water along and towards the turbine, means for removing excess heat generated during operation of the generator, made in the form of elements, in the form of flow channels for coolant and/or heated regenerative air. The technical result consists in the independence of the cooling system on the quality of the river or water turbine and the content items that are not expensive in manufacture and Assembly. The product contains known extruded elements, which either contain channels or during Assembly to form channels for circulating coolant, in particular the circulating air, or any other appropriate coolant. The external surface of the extruded elements facing the flowing water turbine. 11 C.p. f-crystals, 18 ill. The invention relates to an improved device in the capsule generator, comprising a housing of the generator, placed in the stream of water that flows along it and towards the turbine, and the device includes means for removing excess heat, genealogist and/or heated regenerative air for indirect or direct cooling of generator air.The known method of cooling capsule generators use air / water heat exchangers installed in the generator housing or capsule, and water is fed from the outside through a pipe at the bottom of the input shaft of the generator. Such a device is often faced with problems that require filters due to river water quality. It was proposed to use the wall of the capsule as a heat exchanger in order to avoid these problems. In this device, the wall of the capsules are made in double conical part of the bow, so provided-water heat exchanger (cooler with double wall"). Water in the intermediate space is circulated by means of pumps through a conventional air / water exchangers. Even if such a known system can work well, it is hindered by some disadvantages, especially concerning expensive additional costs, including significant welding, expensive materials and so on, and thermal resistance of the wall of the capsule is relatively large. The required cooling surface will, therefore, influence the size of the nasal part of the capsule or housing of the generator.Patent Norway N 155305 (SA Alstom-the-Atlantean cooling pipes, through which circulates the cooling air, in which the cooling tube is made on the outer side of the housing of the generator in order to allow cooling of the cooling gas through water flowing through the water channel.U.S. patent N 4524285 (Rauch) refers to the hydrodynamic device containing the first tubular body, the second body having a tapered front portion, is made inside the first housing and the fastening of the electric generator, and a third body with a conical part opposite the conical part of the second building. In the first case the water flows along the outer surface of the second housing, drives the turbine and helps to remove the heat generated by the generator.U.S. patent N 5333680 (Sinnhuber/Elin Energydesign GmbH) refers to a cooling system for the generator, installed in the chamber, which is surrounded by flowing water, and the chamber wall is made of sheet metal and the said walls of the chamber in the direction of water flow is executed in the form of a cooling radiator in the form of double walls ("the cooler with double-walled jacket"), including channel type cooling pockets, in which the secondary refrigerant can be is.Patent EP 0581841 (Reitinger/Elin Energieversorgung GmbH) refers to the capsule generator having a separate cooled stationary transformative elements in the fore part of the turbine casing, and cooled directly flowing water.U.S. patent N 3936681 refers to a cooling unit for an electric generator, in which a convex front portion of a turbine casing, and a convex outer wall equipped with a plurality of short hook of the cooling fins. The purpose of the short hook of the cooling fins to facilitate the fitting convex (non-core) parts of the capsule.Therefore, according to these publications, he is not talking about preferably "longitudinal" and "direct" and double extruded profile elements that must be introduced as cooling elements in the capsule generator, i.e., in particular, making it possible to the outer surface contained the outer groove having favorable characteristics for the stream.Patent Norway N 81871 refers to the elements in the heat exchanger slab-on-grade type serving plate with Goryokaku, in particular, glalie> folds running parallel to large, and all of them are made for the formation of the internal hollow space, providing for certain changes in speed and changes associated with the flow of the liquid flowing between the two plates. According to this patent focuses on preferably corrugated thin plates made by extrusion, which are unlikely to be suitable in the design of bulb turbines or generators.Thus, none of these publications do not give any indication about the use of extruded elements, in particular elements of aluminum, which were collected in conjunction with the capsule generator, giving a combined external and internal flow characteristics and heat transfer properties.The aim of the present invention is the provision of design type, as described above, which both in terms of cost and in terms of operation, demonstrates significant advantages in comparison with the prior art.Further, the present invention is to provide a device in which the welding operation and the use of expensive materials is minimized, while the remains, related to the use of possibly contaminated river water.These objectives are achieved by the device in the capsule generator containing the generator housing with an input shaft and base, located in the stream of water passing of the turbine water along and towards the turbine, which provides a means to remove excess heat generated during operation of the generator containing the elements with flow channels for coolant and/or heated regenerative air for indirect or direct cooling, which according to the invention the elements in the form of flow channels made in the form of extruded elements, preferably on both sides, which are made, or when the Assembly form the internal channels for circulating coolant, in particular for circulating air, or any other appropriate coolant, and the outer surface of the extruded elements are converted to a flowing water turbine.Preferably, extruded items are relevant on both sides with internal channels with internal protrusions in the form of cooling ribs or radiatornye was performed with radiator fins or grooves, passing in the direction of cooling flow for a favorable surface contact with the flow of turbine water flowing along and around them.It is advisable to extruded plate-like elements were made with more or less plate ledges on both sides, which when assembling pairs form internal channels with radiator cooling plates for cooling, in particular, purified water, and forming the outer cooling surface of the radiator plate towards the flowing water turbine.Preferably extruded elements were made in the form of longitudinal direct and dual core plate-like elements forming a direct elements forming the link of the structural part.It is possible to extruded elements were made in the form of profiled elements formed passing in the direction of the flow of straight parallel plate-like parts, in which the rolling part is merged with the rounded parts of the plate without profilesthe.Useful for extruded elements with external and internal profiles formed part or essentially the front section to doctitle, that part of the body of the generator, formed of extruded elements, was placed around the input shaft and/or around the bottom of the pedestal or base.It is advisable that the extruded elements around the input shaft and the grounds were placed with bandwidth without obstacles circulating air in the generator housing from one peripheral side of the generator and then the direction of the air containing these elements cooling means returning the cooled circulating air to the Central part of the generator.Preferably, the means for removing excess heat, made in the form of base or Foundation, was placed symmetrically with respect to the introduction of the mines to optimize flow.It is advisable that the device was made with the possibility of the circulation of the coolant, in particular, circulating air, using the specified overpressure.It is possible that the means for removing excess heat was made in the form of a self-sustaining structure.Useful for extruded elements in the assembled state form a individual running a capsule or support us placed in relation to water generator and the connection with the capsule generator.Additional features and advantages of the present invention will become apparent from the following description, considered in connection with accompanying drawings and the attached claims.Fig. 1 is a schematic cross-section of a turbo-generator capsule type, using the previously known cooling technology.Fig. 2 is a view in isometric front bow case generator having essentially smooth double rounded surface in accordance with known technology.Fig. 3 is a view in isometric similar to Fig. 2, but in which one or more body parts of the generator are of the variant example of implementation of the device according to the invention.Fig. 4 in an enlarged scale a cross-section of the body of the generator shown in Fig. 3.Fig. 5 - section, as can be seen from above, the upper part of the body of the generator shown in Fig. 3 and Fig. 4.Fig. 6 is a view in isometric similar to Fig. 2, but in which special nose piece included in another variant implementation of the device according to the invention.Fig. 7 is a cross - section of the bow shown in Fig.6.Fig. 8 is a partial front view and /P> Fig. 10 is a view in isometric similar to Fig. 2, but in which the nose portion is made in the form of another version of the exercise device according to the present invention.Fig. 11 in an enlarged scale a cross-section of a variant of implementation of the extruded profile, which accordingly can be entered in the device according to the invention.Fig. 12 is a end view, in which multiple profiles according to Fig. 11 assembled with the internal circulation channels, including fins protruding inside, and circulation channels form the external radiator plate and grooves.Fig. 13 is a front view, with partial section, of a variant of implementation of the device according to the invention, in particular, in which the device is or is part of one or more bearing devices for the body of the generator.Fig. 14 and Fig. 15 is a cross section on an enlarged scale, taken along the line A-A and line B-B in Fig. 13, respectively.Fig. 16 - in a somewhat enlarged scale a cross section of main parts included in the variant embodiment of the invention, illustrated in Fig. 13, 14 and 15.Fig. 17 is a cross - section of a variant embodiment of the invention extruders is - the ID from the end, in which multiple profiles according to Fig. 17 is assembled with the internal circulation channels, including fins protruding inside, and circulation channels form the external radiator plate and grooves.In Fig. 1, which illustrates a schematic cross section of the hydrogenerator capsular type G, capsule or casing of the generator indicated by the reference number 1, and the generator housing 1 constitutes the main element of the hydro generator, which is placed in the turbine pipe 2, through which the river water 3 or similar water flows along and in the direction of the turbine 4, which is located down in the course relative to the housing of the generator 1.The hydro generator G, is illustrated in Fig. 1, uses a conventional technology for cooling hydro generator, and the hydrogenerator contains water-air heat exchangers 5, placed at the bottom of the capsule, and water is supplied from the outside through the pipes 6 through the input shaft 7 of the generator. Itself the cooling water taken from the river water, which often requires filters due to river water quality, which, in turn, makes the installation of river generator is more expensive and complicated.In Fig. 2 illustrates in isometric view Perea made double, thereby providing a water-to-water heat exchanger (cooler with double jacket"). Here the water in the intermediate space can circulate through the pump through the usual air / water heat exchangers, for example, of the type discussed in connection with Fig. 1. Such a double curved surface is still made of steel, and the surface was carried out by welding a double curved spherical elements, which implies a significant welding work. On top of the generator housing 10 provided with the input shaft 17 and the bottom of base 18.In Fig. 3, 4 and 5 show details of a variant of implementation of the device according to the invention, in which a coolant, in particular cooling air, is passed through the means for giving a direct heat exchange with turbine water flowing around.In Fig. 3 illustrates in isometric generator housing 110 having substantially the same design as the fore part 10A of Fig. 2, but in which around the upper input shaft 117 and the pedestal or base 118 includes a tool, functioning as a guiding structure for the external flow and internal heat exchanger.In other words, around the upper input shaft 117 was introduced cooling with the gain channels, or when Assembly form channels a and 112b, respectively, for circulation of a coolant, in particular cooling air, or any other appropriate coolant, for example, elements of the type illustrated in Fig. 11 and 12, which also shows how these channels a, 112b contain internal protrusions in the form of cooling fins or radiator plates 113, providing a large surface area of heat transfer.Further, from Fig. 3 shows that the cooling means 110A and 110b are made so that it forms a directed outwards external radiator plate and the grooves 115, passing in the flow direction favorable for surface contact with the turbine with water flowing along and around, as also shown in detail in Fig. 11 and 12.Further, from Fig. 4 and 5 it is clear that the elements that are included in the cooling means 110A and 110b around the input shaft 117 and the base 118, respectively, may allow cooling air to circulate freely from one peripheral side of the generator 140 and then return to the channels a coolant containing elements 110A and 110b, respectively, where the cooled air, see the arrows D and E may return to the Central part of the generator.
< the parts direct parallel plates, passing in the flow direction, which is towards the downstream merged into a rounded side plates 141' and 142', respectively, it turns out the picture thread, much of which can be compared with the picture of the flow, which is illustrated in Fig. 2, which uses the usual constructive ways.It should be clear that the material from which made the cooling means 110A and 110b must have favorable characteristics in terms of thermal conductivity and favorable resistance to corrosion, while the material can be manufactured by a simple method using extrusion, such as aluminum, plastic or corresponding alloys or mixtures of other materials.In Fig. 6-9 shows the details in connection with another embodiment of the device according to the invention, in which the cooler, in particular, circulating air and/or bearing lubrication, can be passed through a tool that provides direct heat exchange with turbine water flowing around.In the embodiment of the invention according to Fig. 6-9 specified tool that provides direct heat exchange with turbine water flowing around can be, in essence, I flow, and as the heat exchanger.It should be clear that the tool can be expressed either in the form of a self-sustaining structure, or the tool may be assembled with the external supporting means, for example, bases and/or input shafts.In Fig. 6 shows an isometric case of hydro generator 210, having a nose portion 210A, which is included in a variant of realization of the device according to the invention, and the nose is made of extruded elements, in particular made of aluminium profiles, as in the embodiment of Fig. 11 and 12, but here designated 211.In Fig. 6-9, which show the nose portion 210A, which is another variant of implementation of the device according to the invention, in particular, Fig. 9 shows how the circulating air in the form of arrows 216 is routed through the internal channels 212 from various parts of the generator 217 and through the fan 216 back into the engine-room 219.It should be understood that the circulating air 216 can be used for direct cooling of generator parts 217 and that the circulating air can act as a cooler for cooling the bearing grease.How special the direct service of the ship, but it should be clear that the wedge-shaped structure can also be bent or broken in the form of two or more straight surfaces on each side, in order to ensure the proper direction of flow of the river water.In Fig. 10 shows another variant embodiment of the invention, which shows the hydro generator 310, having a nose portion 310A containing extruded elements 311, placed at a distance from each other around the fore part 310A. There are also elements 311 is made in the form of direct elements in the flow direction, which are appropriately combined with curved front nose part V and forth with rounded portions 310C between elements 311. In addition, elements can be performed as discussed in connection with Fig. 11 and 12.As described above, in Fig. 11 and 12, shows an example of a single profile 111 and double profile 111a, 111b, and two elements 111a, 111b are shown in Fig. 12 and assembled so as to form an internal circulation channels 112 or a, 112b for circulating air, while cooling fins 113 are inside the channels, and while circulating channels 112 form the external radial, as discussed above, provide a significant heat transfer surface, and alternating external radiator plate 114 and the cavity 115 provide a substantial contact area with the river water flowing around.It should be clear that the device according to the invention may contain a cooling medium, suitably made in the form of essentially extruded elements, which in the assembled state form individual flow-through capsule or form a support device for capsule generator, in particular, as a base or Foundation, in both cases, placed in the flow of water from the outside of the capsule, and at the same time in respective communication with the capsule generator with its cooler, in particular, purified cooling water or any other suitable coolant.In Fig. 13-15 shows a variant implementation of the device according to the invention, in which the device is part of the upper bearing device a and lower bearing device 410b for the body of the generator 410 containing extruded elements 411.Fig. 16 shows in enlarged scale a cross-section of the main elements included in Vara implementation of the extruded profile, which can be included in the device according to Fig. 13-15.Fig. 18 shows an end view, in which multiple profiles according to Fig. 17 were collected from the internal circulation channels with cooling fins, protruding inside, and circulation channels form the external radiator plate and grooves.In addition, there is coolant a, 410b are made of extruded elements, where elements 411 on one side contain cooling fins 413 and on the other side contain cooling radiator plate 414. In the Assembly of many such elements 411 these elements are collected in pairs, form the internal channels 412, having a set of internal radiator cooling plates 413 for cooler, in particular, purified water, while the collected channel 412 from the outside form a radiator cooling plate surface 414 in the form of grooves 415, provided with ribs facing the flowing water turbine.In addition to acting "internal" cooling fins 413 at predetermined distances performed combined separating and supporting ribs 420, which, in the event of axial rotation elements by 180 degrees relative to each other, the welding operation. 1. The device in the capsule generator containing the generator housing with an input shaft and base, located in the stream of water passing of the turbine water along and towards the turbine, means for removing excess heat generated during operation of the generator containing the elements with flow channels for coolant and/or heated regenerative air for indirect or direct cooling, characterized in that the elements of the flow-through channels made in the form of extruded preferably on both sides of the elements, which are made with internal channels or when the Assembly is formed for circulating the coolant in particular for circulating air or any other appropriate coolant, and the outer surface of the extruded elements are converted to a flowing water turbine.2. The device under item 1, characterized in that the extruded profile elements are made on both sides with internal channels with internal protrusions in the form of cooling fins or radiator plates, providing a large heat transfer surface, and the outer surface of the profile elements made poverhnostnogo contact with stream water turbine, the current along and around them.3. The device under item 1, characterized in that the extruded elements are plate-like with more or less plate ledges on both sides, which when assembling pairs form internal channels with radiator cooling plates for cooling, in particular of purified water, and forming the outer cooling surface of the radiator plate towards the flowing water turbine.4. The device under item 1, characterized in that the extruded elements are in the form of longitudinal direct and dual core plate-like elements forming a direct elements forming the link of the structural part.5. The device under item 1, characterized in that the extruded elements are in the form of profiled elements formed passing in the direction of the flow of straight parallel plate-like parts, in which the rolling part is merged with the rounded parts of the plate without profilesthe.6. The device under item 4 or 5, characterized in that the extruded elements with external and internal profiles form part of or, essentially, the front section of the body of the generator, with the elements of the forms is to be the body of the generator, formed of extruded elements placed around the input shaft and/or around the bottom of the pedestal or base.8. The device according to p. 7, characterized in that the extruded elements around the input shaft and the base is placed with the opportunity to pass without hindrance circulating air in the generator housing from one peripheral side of the generator and then the direction of the air containing these elements cooling means returning the cooled circulating air to the Central part of the generator.9. The device under item 7 or 8, characterized in that the means for removing excess heat, made in the form of base or Foundation, placed symmetrically with respect to the introduction of the mines to optimize flow.10. Device according to any one of paragraphs.1 to 9, characterized in that it is made with the possibility of the circulation of the coolant, in particular the circulating air, using the specified overpressure.11. Device according to any one of paragraphs.1-10, characterized in that the means for removing excess heat is made in the form of a self-sustaining structure.12. The device under item 1, characterized in that the extruded elements in sobran the particular base or base, in both cases appropriately placed in relation to water generator and the connection with the capsule generator.Priority points:
05.09.95 on PP.1 - 4, 6 - 7, 9 - 12;
08.02.96 on PP.5 and 8.
FIELD: power engineering.
SUBSTANCE: method is designed for generating electric energy using natural energy enclosed in high pressure formation. Proposed method includes placing of turbine in well to which high-pressure agent is delivered, and electric generator with cable. Turbine is installed in encased well between showing high-pressure formation and intake low-pressure formation. Turbine is connected by pipes with electric energy generator. Flow of agent from high-pressure formation into low-pressure formation and to surface is provided. Regulation of agent flow into annulus and tube space is provided by distributing valve arranged in lower part of assembly of turbogenerator and hole between housing of turbine and pipe connecting tube space with annulus.
EFFECT: provision of effective generation of electric energy using energy contained in high-pressure formations.
2 cl, 1 dwg
FIELD: power engineering.
SUBSTANCE: proposed complex sea power station is designed for producing energy using renewable sources. Station consists of deep water intake unit, energy complex, hydrogen sulfide removal bath, electrolysis bath, photolyzer, hydrogen receiver and fuel chemical element station. Moreover, it includes thermocoupled battery placed in bath for hydrogen sulfide removal to obtain primary electric energy owing to difference in temperatures of deep water and water heated in bath; power unit including diesel generators operating on hydrogen formed in photolyzer and electrolysis bath, galvanoelectric station using sea water as electrolyte and gas holder for accumulating received hydrogen and keeping it in reservoir arranged in underwater part; output electric energy and monitoring unit and unit to control operation of all systems of complex sea power station, signaling and communication for self-contained operation, and unit to stabilized complex sea power station in right sea.
EFFECT: provision of supply of consumers and reliable operation in rough sea.
FIELD: conversion of wind or water flow kinetic energy into electricity.
SUBSTANCE: proposed propeller that can be used as component part of small power installations, toys, entertainment means, educational rigs for schools and collages has shaft-mounted bushing with vanes and is provided with electrical energy generation facility in the form of sealed hollow housing with end and side walls accommodating fixed inductive ring and movable permanent-magnet component. Electrical energy generating facility can be disposed on bushing at vane opposing end, between opposite vanes, between bushing and vane, or within vane.
EFFECT: enlarged functional capabilities.
5 cl, 7 dwg
SUBSTANCE: hydraulic unit of borehole hydraulic power plant includes hydraulic turbine that is connected to electric generator, which are installed in borehole, electric cable that connects electric generator on the surface with electric converter. Hydraulic turbine is turbodrill, electric generator is electric drill, which are unitised and connected by means of common casing with slots. To bottom part of casing fixing unit is connected, which includes bottom-hole thrust block, fixing unit levers and thrust levers, the sliding elements of which are installed with the possibility of movement along bottom-hole thrust block cone, thus affecting fixing element levers, causing their divergence to borehole walls. Hydraulic unit is equipped with unloading device, for instance, jack that is connected with top end of boring column.
EFFECT: operable device for power generation by borehole hydraulic power plant and avoidance of expenses for development of borehole hydraulic unit.
SUBSTANCE: invention relates to construction of hydro electric power stations in areas with intensive water flow. Hydro electric station contains open distribution device, synchronous horizontal capsular hydro - turbinal generators placed into the intensive water flow, platform - foundation, vertical guiding - stands, pulling - and - running mechanism and process platform. Synchronous generators are joined , at least, into two vertical areal favus - capsular systems and are hung - up in pairs and moving over and/or under the water surface by means of pulling - and - running - mechanism towards the guiding stands. Lower ends of the guiding stands are fixed on the platform - foundation arranged on the bottom of the intensive water flow. Areal favus - capsular systems of synchronous generators are set moving in the guiding stands connected with the bottom by anchor - cable braces. Open distribution device is set on the guiding stands above the water surface. Such a construction of hydro electric power station decreases labor intensity of its building - up, of its maintenance and repair, and ensures continuous and steady regimen of its operation.
EFFECT: decreased labor intensity of construction, maintenance and repair works, providing continuous and steady operation of hydro electric power station.
FIELD: machine building.
SUBSTANCE: invention relates to power engineering and can be used to control water level in downstream pools of operating hydro system. The proposed method consists in that the flow friction is created in the downstream pool by mounting several free-jet hydro turbine units at the riverbed with the help of piles to allow their removal and replacement in operation. The invention comprises the aforesaid free-jet hydro turbine unit to be used in the said method.
EFFECT: higher profitability, lower operating costs, higher output of electric power.
3 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: invention relates to power engineering and is designed to transform the power of river streams and tides into AC or DC electric power. The damless hydroelectric power station comprises a confuser-diffuser cylindrical-entrance water duct whereat a quick-acting gate and turbine are located. The said gate is arranged in the turbine and represents a double-acting facility operating depending upon the water flow direction in the aforesaid water duct. The said cylindrical entrance communicates via bypass branch pipes with check valves fitted therein with two buffering capacities communicating via a bypass pipeline. The pipeline houses the turbine connected to the electric generator. Each buffering capacity communicates with the aforesaid cylindrical entrance with the help of two bypass branch pipes, one being located ahead of the gate while the other one operates behind it along the stream in water duct.
EFFECT: all-season acting damless hydroelectric power station.
SUBSTANCE: offshore drilling platform includes supports for fastening to the ground and platform foundation. Diesel-generator is installed on the platform foundation. The diesel-generator supplies power to drilling equipment and personnel quarters. There is a control unit between power consumers and generator. No less than one additional generator with the drive operating on the natural power sources is connected to the control unit. At least one additional generator may be designed to have aerodynamic drive exploiting wind power and installed on the upper part of the support. At least, one additional generator may be designed to have hydrodynamic drive operating from wave power and installed on the support under water. Aerodynamic drive or hydrodynamic drive may be implemented as two co-axial airscrews connected with the additional generator through the facility of two shafts rotation movement transformation to the rotation movement of one shaft, e.g. differential orbital increase gear.
EFFECT: electrical power supply to consumer.
14 cl, 6 dwg
FIELD: electrical power engineering.
SUBSTANCE: invention relates to power generation and can be used in constructing low pressure river, tidal or wind power installations. A three-phase electric generator is put between orthogonal turbines. The orthogonal turbines have a common fixed axis. The electric generator is provided with at least one two-way action inductor. The inductor or inductors are immovably attached on arms in a circular direction using frames mounted on the axis. The magnetic core and windings of each inductor are put on a separate arm. The latter is semi-pivotally connected to the frame with possibility of axial displacement about the orthogonal turbines. Adjacent phase windings of each inductor of the electric generator intersect crosswise, creating electromagnetic fields, propagating in opposite directions at different sides of the inductor and the latter face different turbines. Electric power cables from the inductors are brought out on elements of the fixed frame through the hollow fixed axis of the power generating unit.
EFFECT: invention increases reliability of operation of power installations with orthogonal turbines by simplifying design of the power generating unit, as well as more efficient use of the energy of water or air medium.
4 cl, 5 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention relates to structures of installations for energy conversion of water course of airflow into electrical power. Hydropower installation contains generator 1 and hydrodynamic drive 4, implemented in the form of two sequentially installed screws 7 and 8, implemented with rotation ability into side opposite and connected to generator 1 through conversion facility of rotational movement of two shafts into rotational movement of one shaft, implemented in the form of conic step-up gear 13, installed in inner body 6. Inner body 6 is affixed to external body 5 by means of two wicket gates 23 and 24, provided for spinning of water flow before its supplying to the back screw 8.
EFFECT: invention is directed to increasing of coefficient of efficiency of installation ensured by increasing of back screw coefficient of efficiency.