DE1525252B2 - Storage for vertical shafts - Google Patents

Description

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Large machines with a vertical shaft, such as B. starting from the combination of a hydrostatic electric hydropower generators, in general thrust bearing with a hydrodynamic thrust bearing, my on hydrodynamically lubricated Axialla- forms according to the invention a floating angegern stored. Hydrodynamic thrust bearings have the ordered track ring with their lower face higher friction losses than hydrostatic bearing 5 counter sliding surface of the hydrodynamic axial bearing ger, however, the latter is used for large machines and the base of the hydraulic machine with its upper face usually not because they are practically static thrust bearings. In normal operation, i. H., have no emergency running properties, so that if the hydrostatic bearing is running pressure failure the pressure oil supply is very easily fed to an oil, only carries the hydrostatic Destruction of the bearing and damage to the io bearing the shaft, so the advantage of low machine parts carried by the warehouse. Frictional losses of a hydrostatic axial bearing

To reduce frictional losses while being fully utilized. Since the friction between the the operation of a hydrodynamic axial bearing bearing surfaces of the hydrostatic bearing is essential it is known that this with a pressure acting by compressed gas is less than the friction between the wings The same support bearing relief device to combine 15 of the hydrodynamic bearing, both the Ren. The in Austrian patent 204 335 mating sliding surface of the hydrodynamic axial bearing Load bearing relief device described as well as the base of the hydrostatic thrust bearing stands from a rotating piston in a stand-forming track ring held by friction on the the cylinder. Both parts are mutually sealed tet. By supplying a pressurized 20 that this does not take effect. However, falls in one Gas in this cylinder becomes the piston and thus the pressure oil supply of the hydrostatidie in the event of damage If the shaft to be supported is raised and thus the bearing to be seen, the friction on the barrel bearing increases serving the shaft, but constantly coexisting surfaces of the hydrostatic bearing until the men with the relief device effective hydro-track ring from the support head of the vertical shaft mitgedynamische Axial bearing relieved. The support bearing is removed, what after overcoming the static release load device and the hydrodynamic axial exercise of the hydrodynamic axial bearing is the case. bearings are arranged one below the other as seen in the axial direction. however, they each have their own wing of the hydrodynamic bearing a load-bearing one construction, which is responsible for the transfer of the total load of the lubricating film on which the machine can leak, is designed. 30 So the hydrodynamic bearing now occurs automatically

Furthermore, it is already known for storage for table in action. A destruction of the hydrostatic

vertical waves a hydrodynamic and a see bearing is avoided. This training

Combining hydrostatic bearing by manure the bearing according to the invention is extremely

placed them radially next to each other. With this known space-saving and means that the hydrodynamic

Storage, both camps are designed so that each bearing is dimensioned as an emergency bearing alone, none

can carry the shaft in continuous operation. Such a huge additional expense. The

Design is spatially and cost-wise very good properties of both types of bearing (very low

agile. Friction and low bearing losses and the emergency running

In order to have a hydrostatic bearing with emergency running capability, while avoiding its disadvantages

it is already known to use this with 40. In addition, the inventively trained

to combine a roller bearing that is able to withstand the greatest bearing forces during the dete storage.

normal operation is bridged by a pin. and therefore with advantage as a warehouse for large electrical

Now the pressure oil supply for the hydrostatic hydropower generators with vertical shaft drops

if the bearing looks like it is suitable due to the increased friction.

between the track ring of the hydrostatic bearing 45 In carrying out the inventive concept, it is

and its counter ring, the stress on the pin is advantageous, the pressure oil to the hydrostatic axial

so big that it breaks. As a result, the roller bearing is placed over the normally stationary track ring

bearing released, on which the machine can then be carried out, whereby the device for pressure oil supply

can run. This known device is designed in such a way that if the

dings the disadvantage that it only allows a rotation of the track ring for an emergency 5 ° oil pressure. this

case is ready for use because the pen can after its Zer- z. B. happen that the contact pressure

malfunction must be renewed every time so that the seals between the pressure oil supply and

the bearing in the same way as before are operated mainly by the pressure of the track ring

can. In addition, roller bearings can only be produced by supplied oil, so that when

Absorb relatively low bearing forces, in which case the seals no longer counteract the oil pressure

Due to the possibility of using the known bearing the track ring are pressed and thus not

arrangement is limited. prevent it from rotating.

The present invention relates to a bearing. In the following, the invention is represented by the steps shown in FIG. 1 for vertical shafts, which result from the combination of one and two illustrated embodiments in more detail erydrostatic Axial bearing with a hydrodynamic 60 refined.

mix thrust bearing is such that during Fig. 1 shows a section through a according to the

normal operation the hydrostatic bearing alone invention trained storage of a vertical

is effective and that the hydrodynamic bearing only shaft;

in emergencies in the event of failure of the hydrostatic bearing FiR. 2 also shows a special section in section

takes effect. This with the simplest possible design of the pressure oil supply to the track ring,

To realize a space-saving construction is To support the vertical shaft 1 this carries

Object of the present invention. the carrying head 2, which rotates together with her. on

In the case of a mounting for vertical shafts, the existing support head 2 are concentric

Rings 3 and 4 attached, which form the running surfaces of the hydrostatic axial bearing 5. As the basis of the hydrostatic axial bearing 5 is used by the track ring 6, the two opposite the rings 4 and 5 Wears rings 7 and 8. At several points distributed along the circumference there are 6 bores 9 in the track ring arranged, which lead to the inner pressure oil chamber 10 of the hydrostatic thrust bearing. Through this The pressure oil is fed to the hydrostatic axial bearing 5 through holes 9.

During normal operation of the machine, the shaft 1 is driven solely by the hydrostatic axial bearing 5 carried. The track ring 6 is held by the friction, on the firmly attached wedge surfaces 11 provided ring 12, which forms the basis of a hydrodynamic axial bearing 13. This hydrodynamic Axial bearing 13 serves only as an emergency bearing. It's just supposed to run out of the machine allow so that it can be made correspondingly small.

The emergency running surface of the hydrodynamic axial bearing 13 designed as a multi-surface sliding bearing is coated with a layer of bearing metal or plastic with good sliding properties. With it during the normal operation of the track ring 6 better on the wedge surfaces 11 of the hydrodynamic axial bearing 13 can rest, each wedge surface 11 runs out to a support surface 14 which is parallel to the surface of the track ring 6 runs.

If the supply of the hydrostatic axial bearing 5 with pressure oil fails due to damage, so the friction increases on the running surfaces of the hydrostatic axial bearing 5 between the ring 3 and 8 or 4 and 7 until the track ring 6 is taken along by the support head 2. This creates on the wedge surfaces 11 of the hydrodynamic axial bearing 13 is a hydrodynamic lubricating film on which the machine can leak.

Since the track ring 6 rotates while the machine is coasting, the pressure oil supply to the Bores 9 formed so that the track ring 6 is not prevented from rotating. Such a pressure oil supply is in Fig. 2 shown. The end parts 15 of the pressure oil line form the cylinder 16 in which the piston 17 is movably arranged. The piston 17 carries the sealing part 18, which the seal 19 presses against the end wall of the track ring 6. Now the holes 9 of the track ring through the hole 20 of the pressure oil supply line and the bore 21 of the piston 17 supplied pressure oil, so this presses at the same time on the end face 22 of the piston 17 and presses the seal 19 firmly against the stationary track ring 6 at.

If the oil pressure falls away in the event of damage, the main contact pressure of the seals 19 does not apply. All that remains is a lower pressure exerted by the spring 23, which is intended to prevent the seals 19 from lifting off the end wall of the track ring 6. However, this pressure does not prevent the track ring 6 from rotating; In addition, the sealing part 18 can be designed so that when the track ring 6 rotates, a hydrodynamic lubricating film is created between the track ring 6 and the sealing part.
In the track ring 6 there are also radially through bores 24 which, in the event of the track ring 6 rotating like a centrifugal pump, circulate the oil in the oil chamber 25, so that the oil forming the lubricating film of the hydrodynamic axial bearing 13 is excessively heated while the machine is running down is avoided.

If the machine has run down with the help of the hydrodynamic axial bearing 13, then there is a When starting up again, make sure that the pressure oil supply lines 15 are exactly in front of the openings of the holes 9 in the track ring 6 are. To facilitate the alignment of the track ring 6 this can be provided with appropriate setting markings.

It is also advisable to use the ring 12, which forms the basis of the hydrodynamic axial bearing 13, to be resilient or articulated so that inaccuracies caused by manufacturing tolerances in the Assembly can be compensated.

Claims (5)

Patent claims: 1. Bearing for vertical shafts, especially for an electrical machine with vertical shaft, consisting of the combination of a hydrostatic axial bearing with a hydrodynamic one Axial bearing, characterized in that a floating track ring (6) with its lower end face the counter sliding surface of the hydrodynamic axial bearing (13) and with its upper face forms the base of the hydrostatic axial bearing (5). 2. Storage according to claim 1, characterized in that that pressure oil is fed to the hydrostatic axial bearing (5) via the track ring (6), the device for supplying pressurized oil being designed so that it can operate when the oil pressure is removed allows rotation of the track ring. 3. Storage according to claim 2, characterized in that the device for supplying pressure oil for sealing the feed point with a substantially by the pressure of the fed Pressure oil is provided on the track ring (6) pressed seal (19). 4. Storage according to claim 2, characterized in that the one carrying the seals (19) Part (18) of the device for supplying pressure oil is designed so that when rotating Track ring (6) forms a lubricating film between it and the track ring. 5. Storage according to claim 1, characterized in that the hydrodynamic bearing (13) is designed as a known axial multi-surface sliding bearing, the inclined surfaces of which (11) run out in supporting surfaces (14) running parallel to the surface of the track ring (6). 1 sheet of drawings