JPS6215542Y2 - - Google Patents

Description

[Detailed description of the invention] This invention holds the bearing stand of the thrust bearing that supports the thrust acting on the rotating machine from the drive side or load side of the horizontal axis rotating machine, and supports the thrust in the axial direction by connecting it to the foundation. The present invention relates to the structure of a thrust bearing pedestal floor provided with a thrust support.

Horizontal shaft rotating machines that require this type of thrust bearing include hydraulic power generators driven by water turbines and electric motors that drive pumps.
In this case, the large thrust acting on the rotating machine from the water turbine or pump is transmitted to the thrust bearing stand floor through the thrust collar, thrust bearing, thrust bearing stand, and thrust bearing stand mounting bolt provided on the rotating shaft of the rotating machine, and the thrust The bearing pedestal floor transmits this to the foundation via foundation bolts. Therefore, the thrust bearing pedestal floor and foundation must have sufficient rigidity to withstand this large thrust.

The relationship between the conventional thrust bearing stand floor and the foundation is
It is as shown in the figure. That is, a rotor shaft 1 directly connected to a water wheel or a pump of a rotating machine is provided with a thrust collar 2, and thrust bearings 3 are arranged on both sides of the thrust collar 2 in the axial direction. A radial bearing 4 for holding the thrust bearing 3 and supporting the reaction force generated on the rotor of the rotating machine is installed outside the thrust bearing 3 and held by a thrust bearing stand 5. The thrust bearing stand 5 is attached to a plate-shaped thrust support 9 at right angles to the axial direction along the center line of the bottom facing the foundation by means of mounting bolts 6.
It is connected to a thrust bearing pedestal floor 8 with a The thrust support 9 is then connected to the thrust bearing pedestal floor by means of welding, bolting or the like.
The thrust bearing pedestal floor 8 is also fixed to the foundation 7 by foundation bolts 10. In this case, a ground layer 11 is provided between the thrust bearing pedestal floor 8 and the foundation 7.

The thrust transmitted from the shaft 1 to the thrust bearing pedestal floor 8 via the thrust collar 2, thrust bearing 3, radial bearing 4, and thrust bearing pedestal 5 is transmitted to the foundation 7 via the thrust support 9 and foundation bolts 10. However, the majority of the thrust is transmitted to the foundation 7 by the thrust support 9. Therefore, in order to ensure the rigidity of the foundation 7 necessary to support the thrust applied to the support 9, the effective dimension in the axial direction of the foundation 7, that is, the value of the dimension a shown in FIG. 1, must be made considerably large. Moreover, in the thrust bearing pedestal floor 8 of FIG. 1, an extra dimension b is required, which is the sum of the thickness of the thrust support 9 provided at the center and the grout layers on both sides thereof.
The axial dimension c of the entire foundation 7 is c=2a+b. A troublesome problem arises in that the value of c often does not fall within predetermined basic dimensions, and this is considered a structural drawback of the conventional thrust bearing pedestal floor 9.

Therefore, in view of the above-mentioned difficulties, the object of this invention is to provide a thrust bearing pedestal floor that has a simple structure and can minimize the axial dimension of the foundation required to support the thrust. With the goal.

This purpose, according to this invention, is to hold the bearing stand of a thrust bearing of a horizontal axis rotating machine, and to provide a thrust bearing stand floor that is provided with a thrust support that is connected to the foundation and supports the thrust in the axial direction. This is achieved by providing vertical bearings at both ends of the bottom surface of the thrust bearing stand floor in the axial direction.

Next, details of this invention will be explained based on an embodiment shown in the drawings.

In Fig. 2, thrust bearings 3 are arranged on both axial sides of the thrust collar 2 of the rotor shaft 1, which is directly connected to the water wheel or pump of the rotating machine, to hold the thrust bearing 3 and to prevent the rotor from the rotor of the rotating machine. As explained in FIG. 1, the radial bearing 4 for supporting the reaction force is supported by the thrust bearing pedestal 5, and the thrust bearing pedestal 5 is further connected to the thrust bearing pedestal floor 8 by the mounting bolt 6. This is exactly the same as in the case of a conventional thrust bearing pedestal floor.

In the case of the thrust bearing pedestal floor shown in Fig. 1, a plate-shaped thrust support 9 for transmitting thrust to the foundation 7 was provided perpendicularly to the bottom surface along the center line in the axial direction of the thrust bearing pedestal floor 8. However, in the case of the thrust bearing pedestal floor of this invention shown in FIG. 2, similar thrust supports 12 are provided at both axial ends of the thrust bearing pedestal floor 8, respectively, perpendicular to the bottom surface. At this time, the thrust support body 9 and the thrust support platform floor 8 are firmly connected by a connection means such as welding or bolting. As a result, the dimension corresponding to b, which is the sum of the thickness of the thrust support located at the center of the bottom surface of the conventional thrust bearing pedestal floor shown in Figure 1 and the thickness of the grout layers on both sides, can be effectively used as a basis. In this case, the axial dimension d of the foundation shown in FIG. 2 is smaller than the above-mentioned C, and therefore it becomes easy to fit the foundation 7 within a predetermined dimension.

Furthermore, according to the structure of the thrust bearing pedestal floor of this invention, the formation of the grout layer 11 provided between the thrust bearing pedestal floor and the foundation is significantly easier than in conventional methods, and therefore the cost required for foundation work is reduced. is reduced.

As explained above, this invention holds the bearing stand of the thrust bearing for supporting the thrust acting on the rotating machine from the drive side or load side of the horizontal axis rotating machine, and connects it to the foundation to support the thrust in the axial direction. In a thrust bearing pedestal floor equipped with a thrust support that supports the It is possible to reduce the dimensions to obtain the necessary rigidity to support the thrust bearing base and fit it within the specified foundation dimensions, and also to facilitate the formation of the grout layer provided between the thrust bearing pedestal floor and the foundation. This has the effect of reducing construction costs.

[Brief description of the drawings]

FIG. 1 shows the relationship between the conventional thrust bearing pedestal floor and the foundation, and FIG. 2 shows the relationship between the thrust bearing pedestal floor and the foundation of this invention. 1: Rotating shaft of rotating machine, 2: Thrust collar, 3:
Thrust bearing, 5: Thrust bearing stand, 7: Foundation,
8: Thrust bearing pedestal floor, 9, 12: Thrust support.

Claims (1)

[Scope of utility model registration request] In a thrust bearing pedestal floor that holds the bearing pedestal of the thrust bearing of a horizontal axis rotating machine and is provided with a thrust support that is connected to the foundation and supports the thrust in the axial direction, the thrust support is attached to the bottom surface of the thrust bearing pedestal floor. A thrust bearing pedestal floor characterized by vertical bearings at both ends in the axial direction.