CN201330623Y

CN201330623Y - Bearing adjustable contact type sealing device of turbogenerator set

Info

Publication number: CN201330623Y
Application number: CNU2008202116712U
Authority: CN
Inventors: 张焕元; 李井有
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2009-10-21
Anticipated expiration: 2018-12-15

Abstract

The utility model relates to a bearing adjustable contact type sealing device of turbogenerator set, wherein an outer ring is sleeved on the surrounding wall of an inner ring, two symmetrical adjusting screws and a top thread are installed on the side wall of the outer ring to form an adjusting mechanism, at least two grooves are arranged on the inner wall of the inner ring, a plurality of sealing blocks are installed in the two grooves and form sealing rings along the outer wall of a rotor, symmetrical guiding pins are arranged on the side wall of each sealing block, pressure springs are respectively installed on one side of the guiding pins of each sealing block, spring holders are arranged on the lower portion of the sealing block, the pressure springs are arranged in the spring holders, and the upper end positions of the pressure springs are supported on the outer wall of the inner ring. The bearing adjustable contact type sealing device of turbogenerator set has compact structure, rational design, convenient installation, good sealing performance, strong the adaptability to the surface condition of shafts, safe and reliable operation, high operation rate and long service life.

Description

The adjustable contact type sealing device of bearing of turbo generator set

Technical field

The utility model relates to the adjustable contact type sealing device of a kind of bearing of turbo generator set.

Background technique

At present, Turbo-generator Set adopts thin oil lubricant, for prevent bearing oil leak outside and Under Variable Conditions of Steam Turbine or axle envelope are adjusted improper untimely etc. for a back-steam, steam leaks outside and enters bearing oil system, what generally adopt at present is that the edge copper sheet is as seal, usually in order to reduce, the generation of above-mentioned situation, people try hard to reduce crack between rotor journal and the seal (oil shelves), and the common consequence of bringing is to start in steam turbine set, stop or the process of variable parameter operation in, unit is heated, and (cold) is inhomogeneous to advance to cause that rotor rocks when increasing, often cause outer axle journal of bearing and seal (oil shelves) directly to rub and then cause rotor journal and seal (oil shelves) to wear and tear, wear and tear and cause dynamic and static gaps to increase in acute leakage of oil or the oil to intake.The leaking outside and can cause equipment and environmental pollution of oil, heavy then cause big fire.Water inlet can cause oil quality deterioration again in the oil, and the oil lubrication performance reduces and the liquid regulating system corrosion of steam turbine, makes adjusting malfunctioning accidents caused.And leakage of oil enters in the generator, can cause generator amature, and fixed subcoil insulating reduces, and then reduces generator set availability and reliability.Can cause the hydrogen cooled generator hydrogen purity to reduce simultaneously, increase the hydrogen consumption, it is quick-fried with the hydrogen that may cause to increase operating cost.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, and a kind of compact structure, reasonable in design is provided, and is safe and reliable to operation, utilization rate height, the adjustable contact type sealing device of the bearing of turbo generator set of long service life.

In order to achieve the above object, the technical solution adopted in the utility model is: be set with outer shroud on interior peripheral wall, adjust screw and a jackscrew composition regulating mechanism for two that symmetry is housed on the ring-side wall outside, on the inwall of interior ring, have at least two road grooves, be equipped with in it by the polylith sealing block and form seal ring along the rotor outer wall, on each sealing block sidewall symmetrical guide finger is arranged, guide finger one side of each sealing block is equipped with pressure spring respectively, the sealing block bottom is provided with spring seat, pressure spring is housed in it, and position, pressure spring upper end relies on the endocyclic outer wall.

The utility model has the advantages that:

Compact structure, reasonable in design, easy for installation, good airproof performance, strong, safe and reliable to operation to the surface condition adaptability of axle, utilization rate height, long service life.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the utility model sealing block structural representation;

Fig. 4 is Fig. 2 pressure spring enlarged diagram.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

By Fig. 1 one Fig. 4 as can be known, the utility model is set with outer shroud 1 on interior ring 2 perisporiums, adjust screw 4 and jackscrew 8 composition regulating mechanisms for two that symmetry is housed on outer shroud 1 sidewall, on the inwall of interior ring 2, have at least two road grooves, be equipped with in it by polylith sealing block 3 and form seal ring along the rotor outer wall, on each sealing block 3 sidewall symmetrical guide finger 6 is arranged, guide finger 6 one sides of each sealing block 3 are equipped with pressure spring 7 respectively, sealing block 3 bottoms are provided with spring seat 5, pressure spring 7 is housed in it, encircles on 2 outer walls in position, pressure spring 7 upper end relies on.

The utility model is used the distance between special-purpose chock measurement axis and interior ring endoporus when mounted, with adjusting range deviation that screw and jackscrew make its left and right, last three orientation less than 0.1 millimeter, screws at last and adjusts screw and jackscrew.

When the utility model disintegrates maintenance end buckle closure at bearing housing, just can carry out this work, in order with each parts.Once install (having avoided repeated disassembled and assembled scraping centering), every cover flinger ring is installed only tens minutes adjustment time, seal ring has oil-return groove with asking of axle no gap operation (be generally two circle inner rings and keep off oily outer ring dash) the interior ring of A to a minute mouth, outer shroud need not to smear the sealing material to low outer height in minute mouth and the double-deck step, B has avoided the oil leaking pollution environment that old-fashioned oil catch (axle envelope) people from gap cause and has caused the possibility of people's fire, if can people's limit ground avoid the pollution generator amature of interior leakage of oil as the generator inner grease retainer, the reduction of the generator insulating level that the stator line is deceived and the interior hydrogen purity of hydrogen cooled generator reduces and cause, everybody improves the sharp reliability of Security of turbo-generator unit.That seal ring material has is high temperature resistant (can 500 degree Celsius with _ foretell long-time running), wear-resisting, white and moist cunning, characteristics such as have good stability, guarantee that axle is not hindered in long-time running under contact condition, seal ring is externally adjusted with the concentricity of axle, can in unit is standby, carry out, only requiring the axle smooth surface of contacting point not have burr gets final product, even it is uneven or rock the operation that axle bigger than normal surface also can not influence unit for those, the surface of this rotor is rocked 0.6 millimeter, unit puts each bear vibration amplitude of back into operation all less than 0.02 millimeter, the radial space of inside and outside ring is 3 millimeters, the yielding gap that seal ring and interior ring are asked is 2 millimeters, when the fore-telling of generation tile kilning accident rotor was heavy, the interior ring of flinger ring can be made a concession 5 millimeters unlikely fourths and be damaged.But the utility model is in the also extensive use of rotating machinery bearing seal of other industry machinery.

Claims

1. adjustable contact type sealing device of bearing of turbo generator set, comprise interior ring, outer shroud, it is characterized in that: on interior ring (2) perisporium, be set with outer shroud (1), adjust screw (4) and a jackscrew (8) composition regulating mechanism for two that symmetry is housed on outer shroud (1) sidewall, on the inwall of interior ring (2), have at least two road grooves, be equipped with in it by polylith sealing block (3) and form seal ring along the rotor outer wall, on each sealing block (3) sidewall symmetrical guide finger (6) is arranged, guide finger (6) one sides of each sealing block (3) are equipped with pressure spring (7) respectively, sealing block (3) bottom is provided with spring seat (5), pressure spring (7) is housed in it, and position, pressure spring (7) upper end relies on interior ring (2) outer wall.