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Bearing system based on flexible supporting and control method

A flexible support and bearing technology, applied in the direction of bearings, liquid cushion bearings, bearing cooling, etc., can solve the problems of complex installation of tilting pad bearings, high fulcrum contact stress and fatigue, increase bearing cross stiffness damping coefficient, etc., to achieve increased Effects of stiffness and damping, wear elimination, and vibration improvement

Pending Publication Date: 2018-07-24
GUANGZHOU MARITIME INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of industry, the speed of rotating machinery continues to increase, and the performance requirements continue to improve; the traditional mechanical fulcrums often used in existing tilting pad bearings make the installation of tilting pad bearings complicated and have high fulcrum contact stress and contact stress in working conditions. Fatigue will increase the damping coefficient of bearing cross stiffness and bring about unstable factors

Method used

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  • Bearing system based on flexible supporting and control method
  • Bearing system based on flexible supporting and control method
  • Bearing system based on flexible supporting and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 as shown, figure 1 It is a structural view of the bearing system based on flexible support; the bearing system includes a bearing housing 1, the bearing housing 1 is arranged as a hollow cylindrical structure, and several tiles are arranged on the inner surface of the bearing housing 1 block 2, the pads 2 are uniformly distributed in a ring shape around the central axis of the bearing housing 1; the rotor 3 is arranged in the ring structure formed by the pads 2. Both sides of the bearing housing 1 are connected to the bearing end cover by bolts.

[0035] The bearing housing 1 can be configured as an integral structure or a split structure. The bearing system can be divided into three-watt, four-watt, five-watt and other multi-watt tilting pad bearings according to the number of the pads 2 .

[0036] The bearing housing 1 is provided with several adjustment holes 11 in the radial direction. Preferably, the adjustment holes 11 are arranged at the posit...

Embodiment 2

[0041] In this embodiment, the bearing system includes three pads 2; the pads 2 are arc-shaped, such as image 3 as shown, image 3 It is a structural view of the tile 2; the tile 2 includes a friction-reducing layer and a tile back base, and the friction-reducing layer is fixedly arranged on the end face of the tile back base relative to the rotor 3; and is more Preferably, an inner dynamic pressure lubricating film is formed on both arc-shaped end surfaces of the pad 2, and the pad 2 has a certain preload coefficient.

[0042] The preload coefficient m reflects the degree of convergence of the oil wedge on the inner surface of each of the pads 2; specifically, the greater the preload coefficient m, the greater the degree of convergence of the oil wedge on the inner surface of the tile 2, which can force The lubricating medium enters the converging gap to increase the oil wedge force acting on the journal of the rotor 3, thereby tightly constraining the journal of the rotor ...

Embodiment 3

[0049] The fulcrum of the pad 2 is supported by a hydraulic actuator, and the interior of the hydraulic actuator is hydraulic oil at a certain pressure, so it can be regarded as the outer hydrostatic film. The outer hydrostatic film has certain stiffness and damping characteristics at the same time, so when calculating the dynamic characteristics of the flexible support tilting pad bearing, it is necessary to consider both the inner hydrodynamic lubricating film and the outer hydrostatic film. Comprehensive dynamic characteristics of laminated film.

[0050] Therefore, in this embodiment, a two-degree-of-freedom mass-spring-damper model is used to analyze the comprehensive dynamic characteristics, and a single-degree-of-freedom comprehensive support system equivalent double-layer oil film support model is used.

[0051] The equation of motion of the two-degree-of-freedom mass-spring-damper system is:

[0052]

[0053]

[0054] Through the general solution formula of the...

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Abstract

The invention discloses a bearing system based on flexible supporting and control method. The bearing system comprises a plurality of tile blocks, a bearing shell and a servo hydraulic actuator, an adjusting rod of the servo hydraulic actuator is in contact with the tile blocks to form static pressure supporting, and by adjusting the magnitude of the hydraulic pressure in the servo hydraulic actuator, the floating displacement amount of a supporting point of the adjusting rod to the tile blocks is changed accordingly; and the bearing system further comprises a hydraulic servo assembly and a rotor vibration monitoring module, hydraulic oil in the hydraulic actuator is connected with the hydraulic servo assembly through a pipeline, a hydraulic control loop is formed, the hydraulic servo assembly and the rotor vibration monitoring module form a loop-locked control loop, and the rotor vibration monitoring module detects the amplitude of a rotor. The bearing system adopts a near fluid supporting point to replace a mechanical supporting point in the prior art, the wear and loss of the tile block mechanical supporting points are eliminated, and the vibration of a bearing-rotor system is improved.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a flexible support-based bearing system and a control method. Background technique [0002] During the operation of rotating mechanical equipment, certain vibrations are often generated, which affects the stable state of each component of the system, reduces the working efficiency of the machinery and equipment, increases the friction and wear between matching parts, and affects the quality of the product. Severe vibration will produce strong vibration noise, damage machine parts, cause machine failure, and even cause accidents. The tilting pad bearing is used as the support of the rotor system, and its lubricating oil film not only produces the bearing capacity of the oil film, but also reduces friction and vibration. The tilting pad bearing has a certain self-aligning ability through the swing of the pad, and the support rotation accuracy is high. And it has good stability an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06F16C33/04F16C37/00
CPCF16C32/0629F16C32/0648F16C33/04F16C37/002F16C2240/22F16C2233/00F16C2360/23F16C2352/00F16C2322/12
Inventor 杨期江李伟光李锻能汤雅连滕宪斌魏安
Owner GUANGZHOU MARITIME INST
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