Method of dynamic shock-absorbing of power transfer shaft, in particular supercritical shaft, and shock-absorbing device for its implementation

FIELD: machine building.

SUBSTANCE: invention relates to method of dynamic shock-absorbing of power transfer shaft, in particular supercritical shaft, and shock-absorbing device for its implementation. System of dynamic shock-absorbing on the power shaft (10) contains input (12) and output (14) roll bearings to transfer power (12r, 14r), bearings are installed in two casings (32, 34), and encircling teeth (15) of the geartrain for speed reduction. The output bearing (14) is paired with at least additional roll bearing (20, 20r), connected with compression shock-absorber (26) to make axial output shock-absorber (20, 26), eccentric relatively to the input bearing (12) against engagement of teeth (15). Two output bearings (2, 14) can be connected by the resilient cage carrier (24) installed on common casing (34). The system is used in power transfer shafts, in particularly in supercritical shafts in turbine machines.

EFFECT: creation of the system ensuring use of thee sufficient shock-absorbing on the power shaft upon hardness keeping at level of the front bearing, to exclude disengagement of teeth of the power geartrain of the drive tooth-wheel.

10 cl, 5 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: vibration absorption device includes a housing of an arbitrary shape, for example cylindrical, which is tightly closed with an elastic diaphragm. Pneumatic elements made in the form of closed elastic cavities are arranged in the housing and connected to each other. Cavities of the pneumatic elements are filled with compressed air and connected to each other with damping elements. A compressed air source is connected to one of the pneumatic elements, and a control valve of pressure in cavities of pneumatic elements is connected to the other one.

EFFECT: higher vibration isolation efficiency.

3 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: positioning system includes installed on a frame processing unit in the form of a pump and an electric motor. Compensating hydraulic cylinders are installed between the frame of processing unit and a fixed base sidewise to the supply pipe. Cavities above a piston are connected to each other and to the discharge pipe. Cavities under the piston are connected to each other and to the supply pipe.

EFFECT: preventing the frame shift with respect to the unit axes.

2 dwg

FIELD: machine building.

SUBSTANCE: device includes rotor (1) supported with a turning support in the form of elastic rod (2) with a rounded end installed in cavity of centre plate (6) fixed on damper (7) submerged into damping liquid (8), housing (9) rigidly attached to rotor (1) and located between the turning support and rotor (1), and a control device installed in housing (9) and connected to the turning support. The control device is made in the form of one or a set of washer plates (10; 11) alternating between themselves. Washer plates (10) are installed along inner diameter on rod (2) and have gap (δ1) to housing (9) along outer diameter. Washer plates (11) are installed along outer diameter in housing (9) and have gap (δ2) along inner diameter to rod (2). Washer plates (10; 11) in the device are pressed in axial direction with the spring installed in housing (9).

EFFECT: creation of a simple design of a rotation stabilising device of a high-speed rotor with high efficiency in wide frequency range without load increase in the support at stable rotation.

9 cl, 5 dwg

Compensator // 2478846

FIELD: machine building.

SUBSTANCE: compensator is formed with bellows, which is reinforced with metal rings and equipped with flanges. Bellows are filled with elastic-deformable substance, sealed with plugs and placed into a cylinder. Cylinder is equipped with a base on one side and with a piston on the other side. Piston is adjacent with its end face to the bellows plug and transmits external force actions to the bellows.

EFFECT: elimination of relaxation and shrinkable phenomena, maintenance of preliminary stress at the constant specified level.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport. The system contains vertical hydraulic dampers installed under body. Each damper is made as piston pump with discharge and free-flow intercommunicating via throttle chambers for working fluid. The throttle is equipped with rod of variable cross-section with thrusts for end positions. Throttle rod movement drive is made as return spring and solenoid. Solenoid core is connected with throttle rod. Solenoid coils are attached to output terminals of control unit. Input terminals of control unit are connected with electric power source and oscillation frequency sensors installed on body in the area of each damper location. Control unit provides automatic change of end positions of throttle rod by solenoid electric power switching on or off according to indications of corresponding sensors of body vibration frequency.

EFFECT: design simplification and improvement of car movement smoothness.

3 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: device includes elongated element (7) that passes along inner space of drive shaft; at that, one end of element is fixed on one shaft end, and the other end of element is located at the other end of shaft and hydraulic damping device (11) fixed on the other shaft end for damping of vibrations of the other end of element (7). Damping device (11) includes cylinder-piston system (25) having the first and the second cylindrical hydraulic chambers (45a, 47a), tank (19) for hydraulic fluid and hydraulic circuit (29, 31, 33, 35), by means of which chambers (45a, 47a) are connected to hydraulic fluid tank (19). Damping device (11) is located so that any leak flow of hydraulic fluid from the first (45a) and the second (47a) chambers through the boundary line between piston and cylinder flows to hydraulic fluid tank (19).

EFFECT: creation of more compact design of hydraulic damping device of torsion excitation of hollow drive shaft with possibility of controlling the damping level and operating without cavitation.

12 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: shock absorber includes hydraulic cylinder, each of the cavities of which is connected to the main elastic elements by means of system of valves and throttles, and to hydropneumatic accumulators of high and low pressure through normally open non-return valves and throttles of constant section.

EFFECT: protection of equipment against impact loads.

2 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to devices for transporter-launcher container (TLC) suspension. System of vertical cushioning includes pendulum gear containing surrounding TLC resting device which is kinematically connected using two first links with pneumatic shock absorbers which are installed on corresponding stationary platforms installed in the upper part of mine construction (MC). Plunger of each pneumatic shock absorber is contacting with rocker arm which is by its one end fixed on MC wall with possibility to rotate in vertical plane and by its other end is connected with the first link. Resting device is made as pivotally connected with the first links power ring on which bearing are mounted in which stud bolts are installed on which drum is fixed. Each stud bolt is made with axial bolt interacting with mating spherical pivot mounted on TLC. On the drum along circumference, radial retainers are installed which interact with mating TLC elements. System of horizontal cushioning includes upper and lower tiers of cushioning each one of which contains four damping devices which are fixed on MC wall and via lever mechanisms with the second links are kinematically connected with TLC using corresponding adapters.

EFFECT: higher reliability of device for TLC cushioning.

3 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: unit of vibration absorption consists of two interconnected pneumatic elements made as closed elastic chambers filled with compressed air. The pneumatic elements are interconnected and connected with a source of compressed air by means of damping channels. The channels are flexible tubes made of elastic material with a calibrated internal cylindrical surface having throttling properties. The system of pneumatic elements or each of them are separately enclosed in a shell of three layers. The outer antifriction layer is made, for example, of woven-wire-cloth containing strong elastic fibres. The middles elastic woven layer is made, for example, of elastic synthetic fibres. The inner layer is made of solid protective material, such as industrial fabric. One of the pneumatic elements is connected to a valve for controlling pressure in the chambers of pneumatic elements, and the other one is to a source of compressed air.

EFFECT: increased efficiency of vibration isolation.

2 cl, 4 dwg

FIELD: construction.

SUBSTANCE: shock-absorbing device comprises a telescopic guide device (2), support boards (10), an elastic element (1). A telescopic guide device (2) is made in the form of opposite external (3) and internal (4) sleeves with a rubber-cord shell (5) and aligning elements (6, 7) installed between them. The elastic element (1) is made in the form of pneumatic shock absorbers arranged evenly around the external sleeve (3) of the telescopic guide device (2) They consist of a body (12), a plunger (13), a rubber-cord shell (14) between them and aligning elements (15, 16). Longitudinal axes of pneumatic shock-absorbers of the elastic element (1) are arranged at the angle 40°-70° to the longitudinal axis of the guide device (2). Plungers (13) are connected in a hinged manner to boards (17), installed on the sites of the base ledges (18). At the end of the inner sleeve (4) of the telescopic guide device (2) there is a tight partition (20) installed with a valve electromagnet device (21). At the ends of plungers of all pneumatic shock-absorbers there are tight partitions installed with valve electromagnet devices.

EFFECT: improvement of device damping properties.

3 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: invention is referred to an electrical machine (1) comprised of a housing (7), stator (11) and rotor (10) installed at the motor shaft (4), which is supported at non-driven side in bearing assembly (14), which contains a set of ball bearings (21, 22) and placed inside the machine housing (7) in radially elastic way with potential insignificant shifting. The bearing assembly (14) comprises a bushing (23), which covers the set of ball bearings (21, 22) and an elastic element (24) whereat the bushing (23) is placed in radially elastic way so that it could be shifted in axial direction. The motor shaft (4) is output from the machine housing (7) at drive side without bearing; it passes up to the connection point (12) wherein there is a set disk (9) for rigid connection of the motor shaft (4) with shaft (5) of the working machine (2). The bearing assembly (14) comprises single-side inner locking ring (30) for axial fixation of the inner ring (22b) of the bearing adjacent to the set of ball bearings (21, 22), at that the inner locking ring (30) with its outer edge (31) is placed inside a circular groove (32), which is made at the cylindrical side of the shaft end extension (13) from the side of the bearing of the motor shaft (4).

EFFECT: manufacture of the electrical machine, which is improved, in particular, in regard to the shaft installation and may be connected in easy and reliable way to the working machine, in particular, to a hydraulic pump.

10 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: group of inventions relates to extra powerful roller bearings, in particular to the bearing system and intermediate element for it. The bearing system contains the roller bearing equipped with external ring, intermediate element and casing element. The roller bearing is made with possibility of installation in the casing element. The intermediate element is located between the external ring of the roller bearing and casing element. Between the external ring of the roller bearing and intermediate element a first contact zone is created, and between the intermediate element and casing element a second contact zone is created. In the first contact zone a cooling system is created. The cooling system has one pocket for cooling, in particular channel for cooling, via which the cooling medium can flow. In the second contact zone a damping system is created. The damping system has one pocket for damping, via it the damping cavity in the second contact zone can be filled with the damping medium.

EFFECT: improved cooling of the bearing system.

12 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: resilient bearing assy comprises bearing 1 with inner and outer races 2, 4 of torsion gearing, and resilient element. Studs 3 are arranged in perimetre of said inner and outer races 2, 4. Resilient element is composed by spring tape 5 fitted with interference to engage in turns said studs 3 and to coupled races 2, 4 and to ensure required stiffness in radial and axial directions. Inner race 2 is rigidly fitted at bearing 1. Studs 3 are made of stiff material and aligned between themselves and with inner and outer races 2, 4. Said spring tape 5 is made of metal.

EFFECT: ruled out steady state self-oscillation of bearing assy, damping of torsional vibration.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: proposed suspension comprises bearing 2 fitted on rotor 1, and vibration-isolating damping elements. Bearing 2 is arranged inside vibration-isolating ring made up of two inner 3, 4 and two outer 5, 6 semi-rings. Pairs of bistable plates consisting of support 7 and compensating 8 plates are arranged diametrically relative to bearing 2. Note here that plates 7 are arranged between inner lower semi-ring 3 and outer lower semi-ring 5, while plates 8 are arranged between inner upper semi-ring 4 and outer upper semi-ring 6. Vibration-isolating ring is fitted between upper 9 and lower 10 housing parts. Every said pair of bistable plates takes up definite load and features low rigidity.

EFFECT: vibration isolation of rotor in radial direction due to lower stiffness in plane perpendicular to rotor axis.

2 dwg

FIELD: machine building.

SUBSTANCE: vibration insulated support is equipped with at least one flexible element (1) made as one or several components of non-woven porous wire material of haphazard structure. In the direction of applied force thickness of flexible element (1) is equal to at least five values of its flexible compliance occurring at influence of the given force to it. Flexible element (1) is installed between end one of rings (2) of rolling bearing (3) and fast (A; 7) or into a circular gap between surface of one of rings (2) and internal or external surface of part (4) conjugated to it. Width of flexible element (1) set into the circular gap is made commeasurable to width of bearing (3). Also, at fitting with a gap between flexible element (1) and ring (2), width should be equal or less, than width of ring (2), and at tight fitting, width of flexible element (1) should be more, than width of ring (2). Fast (a) actuates flexible element (1) with force exceeding value of its flexible counteraction. Flexible element (1) or its part can be made in form of a body of revolution with axial orifice or a tape, or a disk. Flexible element (1) can be made in form of a body of revolution with an axial orifice fabricated of sections of two wire spirals of different diametre. The support can be equipped with two, three and six flexible elements (1).

EFFECT: expanded operational functionality of vibration insulated support used for flexible installation of bearing.

10 cl, 26 dwg

FIELD: machine building.

SUBSTANCE: rolling bearing consists of external and internal rings with rolling elements (balls or rollers) installed between them and retained with separator at distance one from another along circumference between rings. The rolling elements contact spring elements of the rings or the separator and perform reciprocal motions in the direction of radial forces. Also the rolling elements can be installed in seats, made in the rings or in the case of the separator along their external or internal diametre in the direction parallel to their central axis; the rolling elements thrust against springs positioned in orifices connected with the seats and arranged in the direction of radial forces. Maximal diametre of tops of the rolling elements projecting from the separator can differ from diametres of recesses of grooves of the rings at value of amplitude of possible fluctuations of the bearing; a gap of the same value can be made between the rings and the separator. The rings can be made in form of springs of open box-like shape with a cavity on a side or with a slit along the groove to retain rolling elements, or with a cavity on a base side. The orifices for the springs can be made in the direction of equal radial and axial forces at radial-thrust design of the bearing. The procedure for fabrication of bearings with rings of a box-like shape consists in cogging or in rolling a sheet work-piece around fusible insertion; further, the insertion is removed when rings are heated for quenching; also heating and quenching of rings can be performed at a process premises. According to another version of the fabrication procedure the cavities in the rings are ground; at grinding the ring can be imparted with a counter motion at a cutting speed.

EFFECT: raised smoothness of operation of "shaft-bearing-case" systems; improved conditions of operation and increased service life of items.

24 cl, 12 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention refers to seats of bearings for rotary shafts of engines, specifically to gas-turbine. Bearing (14) seat (11, 12) for rotary engine such as gas-turbine engine with rotary shaft (15) supported by at least one bearing (14) and frame (10), capable to work at not less than two various operating speeds and containing at least one low-rigid mechanical supporting structure (12) and one highly rigid supporting structure (11) joined so that they could serve as support for bearing (14) with one of these rigidities. Low-rigid supporting structure (12) is attached to highly rigid supporting structure (11) when engine is working at the speed (f) which is lower than certain rotation frequency (fp), and is detached from highly rigid supporting structure (11) when the engine is working at the speed (f) which is higher than certain rotation frequency (fp).

EFFECT: providing operation without presence of any hydraulic equipment as far as rigidity forces being imparted in such a way are able to counteract directly the excitation forces being generated by unbalanced engine shaft mass.

7 cl, 5 dwg

The invention relates to the field of dynamic stability of the rotor and can be used in supports with bearings flexible rotors turbopump units (TNA) LRE

FIELD: mechanical engineering.

SUBSTANCE: invention refers to seats of bearings for rotary shafts of engines, specifically to gas-turbine. Bearing (14) seat (11, 12) for rotary engine such as gas-turbine engine with rotary shaft (15) supported by at least one bearing (14) and frame (10), capable to work at not less than two various operating speeds and containing at least one low-rigid mechanical supporting structure (12) and one highly rigid supporting structure (11) joined so that they could serve as support for bearing (14) with one of these rigidities. Low-rigid supporting structure (12) is attached to highly rigid supporting structure (11) when engine is working at the speed (f) which is lower than certain rotation frequency (fp), and is detached from highly rigid supporting structure (11) when the engine is working at the speed (f) which is higher than certain rotation frequency (fp).

EFFECT: providing operation without presence of any hydraulic equipment as far as rigidity forces being imparted in such a way are able to counteract directly the excitation forces being generated by unbalanced engine shaft mass.

7 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: rolling bearing consists of external and internal rings with rolling elements (balls or rollers) installed between them and retained with separator at distance one from another along circumference between rings. The rolling elements contact spring elements of the rings or the separator and perform reciprocal motions in the direction of radial forces. Also the rolling elements can be installed in seats, made in the rings or in the case of the separator along their external or internal diametre in the direction parallel to their central axis; the rolling elements thrust against springs positioned in orifices connected with the seats and arranged in the direction of radial forces. Maximal diametre of tops of the rolling elements projecting from the separator can differ from diametres of recesses of grooves of the rings at value of amplitude of possible fluctuations of the bearing; a gap of the same value can be made between the rings and the separator. The rings can be made in form of springs of open box-like shape with a cavity on a side or with a slit along the groove to retain rolling elements, or with a cavity on a base side. The orifices for the springs can be made in the direction of equal radial and axial forces at radial-thrust design of the bearing. The procedure for fabrication of bearings with rings of a box-like shape consists in cogging or in rolling a sheet work-piece around fusible insertion; further, the insertion is removed when rings are heated for quenching; also heating and quenching of rings can be performed at a process premises. According to another version of the fabrication procedure the cavities in the rings are ground; at grinding the ring can be imparted with a counter motion at a cutting speed.

EFFECT: raised smoothness of operation of "shaft-bearing-case" systems; improved conditions of operation and increased service life of items.

24 cl, 12 dwg

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