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Uniform-load thrust bearing

A thrust bearing and thrust technology, applied in the field of thrust bearings, can solve problems such as complex bearing structure, uneven force on pads, reduced equipment reliability and maintainability, etc.

Inactive Publication Date: 2019-12-03
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the further increase of the thrust of the unit, the above-mentioned fixed pad type, Michell type and Kingsbury type thrust bearings are prone to fatigue failure due to uneven stress on multiple pads, high contact stress between line support and point support, and the complex bearing structure reduces the equipment cost. reliability and maintainability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 , figure 2 As shown, in this embodiment, a load-sharing thrust bearing includes an annular thrust base ring 9, an annular groove 91 arranged on the thrust base ring 9 and coaxial with the thrust base ring 9, and several annular grooves 91 The load equalizing block inside, several support blocks 7 arranged in the annular groove 91 and distributed at intervals with the load equalizing block and connected by wedge surface 2 transmission, the said load equalizing block includes at least one static joint fixedly connected with the thrust base ring 9 The load equalizing block 4 and several dynamic load balancing blocks 6 are slidably arranged in the annular groove 91 , the wedge surfaces 2 on the support block 7 are facing oppositely, and the support block 7 is connected with the thrust pad 3 .

[0020] In this embodiment, the thrust pad 3 bears the axial thrust from the thrust disc 1 , if the gap distribution between the thrust disc 1 and the thrust pad 3 ...

Embodiment 2

[0024] On the basis of the above embodiments, in this embodiment, the support block 7 is provided with a long hole parallel to the axis of the thrust base ring 9, and the annular groove 91 is provided with a The support block limit pin 8 and the support block 7 are slidably connected with the thrust base ring 9 along the axial direction of the thrust base ring 9 through the cooperation of the support block limit pin 8 and the elongated hole.

[0025] Utilize the cooperation of the elongated hole and the support block stop pin 8, the support block 7 can slide in the annular groove 91 along the axial direction of the thrust base ring 9, so that the outer diameter of the elongated hole is the same as that of the support block stop pin 8 The movement of the support block 7 along the circumferential direction of the annular groove 91 can be restricted by the support block limit pin 8, which is beneficial to improve the control accuracy and stability.

[0026] In this embodiment, se...

Embodiment 3

[0029] On the basis of the above embodiments, in this embodiment, the thrust pad 3 is rotatably installed on the support block 7, so that when the thrust pad 3 is subjected to uneven thrust, the thrust pad 3 can be rotated The angle or gap between the thrust pad 3 and the thrust disc 1 is adaptively adjusted, so that the thrust pad 3 can be evenly stressed.

[0030] In this embodiment, the thrust pad 3 and the support block 7 are connected through a spherical surface, and the thrust pad 3 can be adjusted from multiple angles and directions relative to the support block 7 by using the spherical connection, which can increase the flexibility of the thrust pad 3 . Utilizing the spherical surface can disperse the pressure transmitted from the thrust pad 3 to the support block 7, which is beneficial to reduce the wear between the thrust pad 3 and the support block 7, and prevent the connection structure between the thrust pad 3 and the support block 7 from being compressed. damage...

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Abstract

The invention discloses a uniform-load thrust bearing. The thrust bearing comprises a thrust base ring, an annular groove formed in the thrust base ring and coaxial with the thrust base ring, a plurality of uniform loading blocks arranged in the annular groove, and a plurality of supporting blocks arranged in the annular groove, distributed at intervals with the uniform loading blocks and in transmission connection with the uniform loading blocks through wedge surfaces. The load balancing blocks comprise at least one static load balancing block fixedly connected with the thrust base ring and aplurality of movable load balancing blocks arranged in the annular groove in a sliding mode, the wedge faces on the supporting blocks face opposite directions, and the supporting blocks are connectedwith thrust pads. The beneficial effects of the invention are that: according to the scheme, uneven stress of the thrust pads can be reflected to axial sliding of the supporting blocks; therefore, the transmission of the inclined wedge surface is converted into the circumferential sliding of the uniform loading blocks, and the gap between the thrust pads and the thrust disc is adaptively adjustedaccording to the stress condition of the thrust pads through the coordination action of the whole circle of uniform loading blocks and the supporting blocks to realize uniform loading, so that the overload failure of the thrust pads is avoided, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to the technical field of thrust bearings, in particular to an equal-load thrust bearing. Background technique [0002] Sliding thrust bearings are widely used in high-speed and heavy-duty equipment such as turbogenerators because of their large load-carrying capacity. Thrust bearings are used to withstand the axial thrust generated by steam force and to limit the rotor axially. [0003] Thrust bearings are divided into fixed pad thrust bearings and tilting pad thrust bearings. The former is used for occasions with small thrust due to uneven force between multiple fixed thrust pads. Tilting pad thrust bearings are divided into Michell type and Kingsbury type, the former is line support, the latter is point support, the design of the two is exquisite and complex, and they are used for medium thrust occasions. [0004] With the further increase of the thrust of the unit, the above-mentioned fixed pad type, Michell type and Kingsbur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/08F16C33/04
CPCF16C17/08F16C33/04
Inventor 彭林
Owner DONGFANG TURBINE CO LTD
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