Gear box assembly of units and oil tank

FIELD: engines and pumps.

SUBSTANCE: gear box assembly of units and a tank for lubricating oil of a jet-turbine engine includes a box with two compartments and a partition wall separating the compartments from each other. One of the compartments forms a gear box of units, and the other compartment forms a tank for lubricating oil and a support at least of one of the units driven with the gear box of units. The gear box of units includes a gear transmission connected to shafts for mechanical actuation of units, which are parallel to each other. The partition wall is located perpendicular to shafts of the gear box of units and closes interaction between two compartments to avoid oil flow between them. The box has a curved shape adaptable for tracing the shape of the cylindrical casing of the jet-turbine engine, on which it is fixed.

EFFECT: invention allows simplifying production of a gear box assembly of units and a lubricating oil tank.

8 cl, 2 dwg

 

The invention concerns a node box drive units and a reservoir for lubricating fluid turbojet engine.

Turbojet engine contains from input to output in the direction of flow of the flue gas fan, one or more compressor stages, for example the high-pressure compressor and the low-pressure compressor, a combustion chamber, one or more stages of the turbine, for example, a high-pressure turbine and low pressure turbine and nozzle for the discharge of gases. Each compressor has one turbine, both connected to one shaft, forming, thus, for example, the stage of high pressure and the low level pressure.

Part of the power generated by the turbojet engine is used to supply energy to various types of equipment turbojet engine. This mechanical power is taken from the shaft-stage high pressure (HP) turbine engine through shaft for PTO, which causes the input shaft of the drive units.

Box drive units known to the specialist under the English name "Accessory Gear Box (AGB). We are talking about a box containing a gear transmission mechanism) associated with a specific number of units or devices, for example an electric generator, starter, alternator, hydrauli the definition, fuel or oil pumps, etc., These different types of aggregates mechanically driven gear box drive units, which takes them through the input shaft gearbox drive units power taken from the shaft of the high pressure stage.

Box drive units usually contains the casing, manufactured by casting; it contains also cast wall bounding a compartment for placing gear drive units. Each gear wheel rigidly connected to the drive shaft associated with one unit. Various units, the driven gear drive, installed directly on the cast housing, with the drive shaft assemblies pass through the wall of the casing for the drive.

The engine also includes a lubrication system that supplies oil to the various elements of the engine to be lubricated. Lubrication system typically contains oil reservoir, the lubrication unit (which circulates the oil in the system) and pipelines to supply oil to the lubricated elements. The lubrication unit is usually installed near the box drive units, as the last of its results.

In some engines, for reasons of compactness and economy of pipelines prefer to install the oil reservoir directly on the box accommodates the da units. For this purpose, the oil tank when casting form dissolve, forming a seat for the box drive units. The problem molded parts of this type is the complexity of its design and manufacture, because casting is a time-consuming operation, which greatly increases the cost of the part.

In engines of different type of oil reservoir separate from the box drive units, which enables to produce a box of the drive units directly by machining on a lathe. Such details made directly by the treatment, experts are often called components made of one piece or one piece, equivalent to the English designation which is machined from solid". More specifically, in this case box drive units can be performed by a technique called "split-line" (the English expression, the literal translation of which is "the dividing line"), under which are two semi-moulds for the manufacture of seats for the box drive units. The oil reservoir, cast, set further back from the box drive units and must be associated with it, which requires the use of ducts.

The objective of the invention is to develop a simpler layout box the drive units and the oil reservoir, allows to reduce the cost of their production.

To solve the problem is proposed node box drive units and a reservoir for liquid lubricant turbojet engine, in this case the auxiliary drive comprises a gear transmission connected in parallel between the shafts for mechanical drive units, this site differs in that it contains a box with two compartments and a partition perpendicular to said shafts, forming compartments, one of which includes drive units, and the second compartment forms a reservoir for liquid.

Thanks to the invention, the node is integral and hence compact, and its manufacture is easy due to the layout of the compartments relative to the shaft associated with the gear.

Preferably, the BMW site (and, thus, compartments) had a common elongated and curved shape, which is adapted to track the shape of the cylindrical casing of the turbojet engine, on which it is installed.

Obviously, in this case, the turbojet engine, located along the axis, a gear box drive units is driven by the output shaft, which is located essentially perpendicular to the axis of the turbojet engine.

It is preferable that the compartments were made fur the systematic processing of the block of metal material. The use of such a method of manufacture of the unit means that the compartments formed without casting operations; in other words, this technology allows to produce parts, usually denoted by the expression "made of one piece" or "one piece" ("machined from solid"). Using this method solves the aforementioned problems associated with the casting, and it becomes possible configuration of the compartments of the node described above.

It is preferable that the compartments were formed by two half-form, bonded to one another.

It is preferable that each proforma contained at least one aperture is limited by the flange, and the two mold halves were bonded together along this flange preferably with a partition.

It is preferable that the hole of each of the mold halves have dimensions greater than or equal to the size of the projection of the gear box drive units on a plane perpendicular to the drive shafts.

It is preferable that the mold halves were bonded to one another with a partition wall, removable, for example, by screwing. Thus, to obtain access to the interior compartment, forming a carton of the drive units, they can be separated for maintenance and repair.

It is preferable that the partition was without removal rigidly connected is with proformas, forming a reservoir for lubricating fluid, for example welded to it.

It is advisable that the compartments had an elongated shape in a common direction perpendicular to the drive shaft assemblies.

Preferably, the compartment forming a reservoir for lubricating fluid, was also a caliper, at least for some units, the driven gear drive units.

It is preferable that the drive shaft of the mentioned units passed at least partially into the Bay, which is the reservoir, through the established in the reservoir protective tubes, inside which are mentioned shafts.

The invention is further explained non-restrictive description of a preferred variant implementation of the node box drive units and tank, with reference to the accompanying drawings, in which:

- Fig.1 depicts in isometric filary view of the declared node according to a preferred variant of the invention, and

- Fig.2 depicts a view in section of the node in Fig.1 in the plane perpendicular to the partition separating the compartments.

The invention is described with respect to the turbojet engine. Turbojet engine includes the step of high pressure and the degree of low pressure, while classically each stage contains the compressor and turbine is. At high pressure stage has a PTO, leading the PTO, mechanically associated with box 1 of the drive units, denoted below by the English acronym AGB 1 for "Accessory Gear Box. More specifically, the shaft transmits the motion to the rotation shaft of the high pressure stage on the input (or drive) shaft AGB 1. Input shaft AGB 1 is associated with AGB 1 connecting piece 11 mounted on the wall of the AGB, in this case on the upper panel of Fig.1. Input shaft, held by the connecting piece 11, classically passes through the top wall of the AGB 1.

Turbojet engine also contains a lubrication system containing the oil reservoir 2, lubricant group 9a (not shown in Fig.1, but shown in Fig.2) and the pipelines bringing oil to the lubricated components, not shown in the drawing. Lubricating group 9a contains, in this case, oil pump, feeding the main oil line, in which oil is directed to power the piping system to supply oil to the various organs of the engines, and these pipelines are directly or indirectly connected with the main oil line. Lubricating group 9a also includes a number of pumps in this case, four pump - pump which returned (usually due to gravity) oil bodies turbojet engine, which is what's already been greased; returned thus the oil is again collected in the oil tank 2, where it comes to power in the main oil line system. Oil system supplies lubricating oil bodies or engine parts to be lubricated such as bearings of the shafts of the engine or gear AGB 1.

In Fig.1 AGB 1 and the oil reservoir 2 is arranged to form a United system that is the system E includes a box of 4, formed by two half-form 4A, 4b forming the first compartment 5A and the second compartment 5b, respectively, with both sections 5a, 5b are separated by a partition 6.

The first compartment 5A forms AGB 1. To this end it provides a seat for the gear 7 (or mechanism 7), mechanically connected with the input shaft AGB 1, the gear 7 is used to transfer power from the input shaft AGB 1 to the units 9a, 9b, 9c, 9d, 9e, 9f turbojet engine. Gear 7 contains several gears 7a, 7b, 7c, 7d, 7e, 7f, rigidly connected with several shafts 8a, 8b, 8c, 8d, 8e, 8f of the actuator units 9a, 9b, 9c, 9d, 9e, 9f, respectively. In addition, it contains a gear wheel 7g, in this case, bevel gear 7g, rigidly connected with one of the shafts 8d, which is in mesh with a bevel gear rigidly connected with the input shaft AGB 1 for the drive system wheels 7a-7f gear front and 7 from the input shaft AGB 1. Each drive shaft 8a, 8b, 8c, 8d, 8d, 8e, 8f is located on the axis 8', 8b', 8c', 8d', 8d', 8', 8f'. Shafts 8a-8f are a classic way in parallel with each other in AGB 1. In this case, the aggregates contain lubricating group 9a, the fuel pump 9b, air starter 9c, the generator of low power 9d, such as a motor with permanent magnets, the starter-generator 9F and hydraulic pump 9f; these units 9a-9f are given as an example.

The second compartment 5b serves as a reservoir for oil lubrication system and forms the oil reservoir 2 of this system. It forms a closed tank where the oil.

The dividing wall between the two compartments 5A, 5b are fixed between the two half-form and overrides any message between them to exclude improper admission of oil from the reservoir 2 into the compartment 5A AGB 1. The partition 6 is perpendicular to the shafts 8a, 8b, 8c, 8d, 8e, 8f.

System E AGB 1 and the oil reservoir 2 in this case has a General elongated shape. More precisely, box 4 system E has a General elongated and curved shape, in this case adapted to track the shape of the casing (cylindrical) turbojet engine where it needs to be fixed. Specialist often calls this form "banana" or "beans"; rather, we are talking about the form with the surfaces (front and back in Fig.1) perpendicular to the shafts and the drive is 8A-8f, which are flat and parallel to each other; these surfaces (front and rear) are associated surfaces (upper and lower in Fig.1), in the form of the cylinder; the edge of the box 4 is formed of curved surfaces, continuously connecting the cylindrical surface between them. Large size (average) system E is perpendicular to the shafts 8a-8f drive units 9a-9f.

Each proforma 4A, 4b has an aperture over the entire surface that is perpendicular to the shafts 8A-8f for drive units 9a-9f. The opening of each of the mold halves 4A, 4b is limited by the edge 10A, 10b made in this case in the form of a flange 10A, 10b, respectively; thus, this flange is perpendicular to the drive shafts 8a-8f. The mold halves 4a, 4b bonded together along the flanges 10A, 10b in this case, respectively. Partition 6 is also connected to the system E respectively; in this case, the same bolts provide tightening of the flanges 10A, 10b between itself and the periphery of the partition 6, which is sandwiched between the flanges 10A, 10b.

Due to system configuration E with a dividing wall 6 that is perpendicular to the shafts 8a-8f may simultaneously produce AGB 1 and the oil reservoir 2 by means of machining a block of metal material, for example metal billet aluminum, titanium or magnesium. Taco is a method of mechanical treatment is less expensive than a method of manufacturing a casting. To some extent we are talking about the way to get a box of 4, made by technology "splite-line, with the two compartments separated by a partition, with different functions.

The fact that the partition 6 is perpendicular to the drive shafts 8a-8f, means that opening half-form 4a, 4b, forming AGB 1 and the oil reservoir 2 has a sufficient size for use of the method of mechanical processing and, in particular, for the passage of machine tools such as milling tools. In particular, the openings are in this case, the size corresponding to the image projected by a system of gears 7, which should contain AGB 1, on the plane perpendicular to the drive shaft 7, for example on the middle plane of the dividing partitions 8; it is the projected image or the projection corresponds to the overall transverse dimension relative to the axis 8a'-8f' drive shafts 8a-8f gear 7 AGB 1.

In accordance with no presents an alternative form of the partition 6 is rigidly and without removal fixed on proforma 4b, forming the oil reservoir; such fastening may be accomplished, for example, by welding. The advantage of this solution consists in the following. Sometimes it is necessary to dismantle the system E AGB 1 and cut rvoir 2 for performing maintenance operations gears 7 AGB 1. Such operations at the same time are not necessary for the oil tank 2. In this case, it is possible to partition 6 was tough and still is connected with an oil tank 2, but removable attached (together with oil 2) to proforma 4A, forming AGB 1.

In Fig.2 shows that some units 9a, 9c, 9F (but not in Fig.1, where they are not depicted) mounted directly on proforma 4b, which is the oil tank 2. Moreover, the oil group 9a partially installed directly in the volume of the oil tank 2 (in a protective jacket 12); thus, lubricating oil pumps group 9a suck, or are applying the oil directly into the tank 2. Air starter 9c and the starter-generator 9F installed on the wall of the mold halves 4b, placed opposite to the partition 6 and, thus, located perpendicular to the drive shafts 8a-8f (we are talking about the front wall of Fig.1). These drive shafts 8C, 8E are, thus, through the volume of the compartment 5b forming the oil reservoir 2; to ensure the transmission of these shafts 8C, 8E through compartment 5b, in the compartment 5b installed protective pipe 8C", 8e" between the dividing wall 6 and the wall, opposite proforma 4b for receiving the drive shafts 8C, 8E, passing, thus, within these protective tubes 8c', 8', while the protective pipe before the rotate any direct contact of the drive shafts 8C, 8E with the oil contained in the tank 2.

1. The node box (1) drive units (9a-9f) and reservoir (2) for the lubricating fluid turbojet engine, and lubricating liquid is supplied to the drive units (9a-9f), and box (1) drive units (9a-9f) contains gear (7) connected in parallel between a shaft (8a-8f) for mechanical drive units (9a-9f), and the specified node contains a box (4) with two compartments (5A-5b) and a partition (6), perpendicular to said shaft (8a-8f) and separating the compartments (5A, 5b), while compartment (5A) forms a box (1) drive units (9a-9f) and compartment (5b) forming a reservoir (2) for the lubricating fluid, also forms a support at least one of the units (9a, 9c, 9F), driven gear (1) for the drive units (9a-9f) and the partition (6) is made overlying any communication between the two chambers (5A, 5b)" to prevent passage of fluid between them, and a box of (4) has a curved shape, which is adapted to track the shape of the cylindrical casing of the turbojet engine, to which it is attached.

2. Site under item 1, in which the turbojet engine is located along the axis, and the gear (7) box (1) drive units (9a-9f) is driven by the PTO, essentially perpendicular to the axis of the turbojet engine.

3.Site under item 1, in which compartments (5A, 5b) is made by machining a block of metal material.

4. Site under item 1, in which the box (4) is made as two half-form (4A, 4b), bonded together, with the first proforma (4A) defines the first compartment (5A), and the second proforma (4b) defines the second compartment (5b).

5. Site under item 4, in which the mold halves (4A, 4b) are bonded to each other and, preferably, wall, removable, for example by screwing.

6. Site under item 4, in which the partition (6) is fixed and not removable connected to proformas (4b), forming a reservoir (2) for the lubricating fluid, for example welded to it.

7. Site under item 1, in which the carton (4) made a General elongated shape perpendicular to the drive shaft (8a-8f) units (9a-9f).

8. Site under item 1, in which the shafts (8C, 8E) for driving the above-mentioned units (9c, 9F) are, at least partially, in the chamber (5b) forming a reservoir (2), in protective tubes (8C", 8E") for the said shafts (8C, 8E) installed in the tank (2).



 

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16 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: system supplying oil to bearings of turbo-machine consists of oil pumps, main oil tank with frame filters, of pressure and drain collectors, pressure oil pipes with case-type welded-in boxes to each of bearings, of oil coolers, of accessories, and of drain oil pipes connecting carters of bearings with drain collector. Additionally, the system has by two moveable rotating boxes installed inside each case-type box by means of a control mechanism connected to a united system controlling flow of oil either instantly shutting it off, or instantly directing to drainage, thus facilitating alternative mode of operation according to a programme for washing the system of oil supply. The invention unites operational and repair circuits into a single system of oil supply to bearings of turbo-machine, facilitates uninterrupted supply of oil via pipelines meeting requirements of fire safety by density of compounds and facilitating improved quality and efficiency of after-repair washing.

EFFECT: automated drive for control of rotating mechanism of moveable boxes, which optimises washing and reduces time for pre-starting operations.

2 cl, 3 dwg

FIELD: heat power engineering.

SUBSTANCE: invention can be used in turboplant of power-and-heating plants, thermal and nuclear power stations. Proposed turboplant contains low-, medium-, and high-pressure cylinders with branch pipes and pipelines to deliver and let out steam with intermediate vertical supports connected to cylinders, rotors and feet of housings. Feet of housings rest on movable bearings sliding along longitudinal key joints relative to fixed foundation frames installed on cross-bars of foundation. Pipelines to deliver and let out steam, shells of heaters, regenerative and heating extractions and valves are provided with limited displacement supports. Each limited displacement support is made guide and turnable in critical directions within tolerable limits. Displacement is limited by thrust spring unit, and turning is limited by rolls with locks. Base of turboplant support is made movable with possibility of turning and limited displacement. Base of support is installed inside fixed housing made in form of parallelepiped on rolls with spacer strips in number of two, minimum. Rolls with spacer strips are installed from below relative to movable base and move along rolling guides. Turning of movable base is limited from side by rotating rolls with locks, two locks for each side surface minimum. Longitudinal displacement of base of support is limited by thrust spring unit.

EFFECT: improved reliability and increased service life of turboplant and its foundation.

2 cl, 4 dwg

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