Numerical simulation method for temperature and thickness relation of static thrust bearing gap oil film based on film thickness variation

A technology of hydrostatic thrust and bearing clearance, applied in the field of fluid mechanics simulation, can solve problems such as overestimation of equipment safety, failure to consider oil film thickness, unfavorable safe operation of equipment, etc., and achieve the effect of increasing rotational speed and shortening design cycle.

Inactive Publication Date: 2011-08-03
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0007] The present invention solves the problem that the existing static pressure thrust bearing internal fluid numerical simulation method does not consider the change of oil film thickness, and the oil film temperature numerical simulation result is lower than the actual situation, resulting in the overestimation of the safety of the equipment in service of the static pressure thrust bearing. It is beneficial to the safe operation of the equipment, and then provides a numerical simulation method for the relationship between the oil film temperature and thickness of the hydrostatic thrust bearing gap based on variable film thickness under critical conditions

Method used

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  • Numerical simulation method for temperature and thickness relation of static thrust bearing gap oil film based on film thickness variation
  • Numerical simulation method for temperature and thickness relation of static thrust bearing gap oil film based on film thickness variation
  • Numerical simulation method for temperature and thickness relation of static thrust bearing gap oil film based on film thickness variation

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specific Embodiment approach 1

[0038] Specific implementation mode one: as Figure 1-7 As shown, the specific process of the numerical simulation method for the relationship between the oil film temperature and the thickness of the hydrostatic thrust bearing gap based on the variable film thickness described in this embodiment is as follows:

[0039] Step A, establish the parent model of the oil film in the gap of the hydrostatic thrust bearing: give the initial value of the thickness of the oil film, and use the modeling function of Unigraphics NX software to establish the parent model of the oil film in the gap of the hydrostatic thrust bearing;

[0040] Step B, pre-processing: In ANSYS ICEM CFD software, perform pre-processing on the hydrostatic thrust bearing clearance oil film parent model generated in the above step A, mesh the fluid domain constructed by the above hydrostatic thrust bearing clearance oil film parent model, and Specify fluid domain boundary conditions;

[0041] Step C, CFX oil film f...

specific Embodiment approach 2

[0060] Specific implementation mode two: as Figure 1-7 , 8 to 11, the numerical simulation method for the relationship between the oil film temperature and the thickness of the hydrostatic thrust bearing gap based on the variable film thickness described in this embodiment, in step A, use the modeling function of the Unigraphics NX environment to establish the hydrostatic thrust The specific process of bearing clearance oil film parent model is as follows:

[0061] Step A1, using the Unigraphics NX environment to perform reverse modeling of the oil film in the gap of the hydrostatic thrust bearing;

[0062] Step A2, parameterize all the dimensions involved in the reverse modeling, and obtain the corresponding expressions;

[0063] Step A3, establishing an oil film model modeling human-computer interaction interface;

[0064] Step A4, establish two functional sub-modules: the sub-module of obtaining model parameters in real time and displaying them immediately, and the sub-m...

specific Embodiment approach 3

[0067] Specific implementation mode three: as Figure 1-7 , Figure 8-11 , Figures 12 to 14 As shown, in the numerical simulation method for the relationship between the oil film temperature and the thickness of the hydrostatic bearing based on the variable film thickness described in this embodiment, in step B, the ANSYS ICEMCFD software is run for pre-processing, and the specific steps are as follows:

[0068] Step B1, automatically import the hydrostatic thrust bearing clearance oil film parent model established in step 1 in ANSYS ICEM CFD software;

[0069] Step B2, establishing standardized auxiliary points and auxiliary lines, so that all auxiliary points are attached to the curve or surface; all auxiliary lines are attached to the curved surface;

[0070] Step B3. Reconstruction of missing surfaces on the oil film model: After the oil film model is imported into the ANSYS ICEM CFD environment, there may be missing or distorted surfaces at the outlet of the oil film, an...

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Abstract

The invention relates to a numerical simulation method for the temperature and thickness relation of a static thrust bearing gap oil film based on film thickness variation, and belongs to the technical field of fluid mechanics simulation, which aims at solving the problems that as the thickness variation of the oil film is not taken into account in the traditional static thrust bearing internal fluid numerical simulation method, the temperature number simulation result of the oil film is lower the actual number. The method comprises the following steps of: establishing a static thrust bearing gap oil film female model and carrying out pretreatment; simulating the flow-state numerical value of the oil film; guiding the averaged temperature of the rotary wall surface of the oil film and the temperature of an appointed fixed wall surface of the oil film after simulating the numerical value; calculating the new thickness value of the oil film by utilizing the relation of the temperature of the oil film and the temperature of lubricating oil; judging whether the new thickness value of the oil film, obtained in the step, is less than the critical temperature of the oil film or not; returning the thickness of the oil film as the thickness initial value of the oil film and then continuously executing subsequent steps; repeatedly calculating until the thickness of the oil film reaches the critical value of the oil film; and obtaining a final pressure field distribution cloud picture and a final temperature field distribution cloud picture of the oil film. The method is suitable for numerical value simulation of a static thrust bearing gap oil film.

Description

technical field [0001] The invention relates to a numerical simulation method for the relationship between the temperature and thickness of an oil film in a gap of a static pressure thrust bearing, and belongs to the technical field of fluid mechanics simulation. Background technique [0002] Hydrostatic thrust bearings are key rotating components in heavy equipment, and their performance directly affects the performance and efficiency of the equipment. Under high-speed and heavy-load conditions, the temperature of the lubricating system of the hydrostatic thrust bearing rises with the increase of the rotation speed. The viscosity-temperature characteristics of the lubricating oil determine that the viscosity of the lubricating oil and the bearing capacity of the oil film will gradually decrease when the oil temperature rises, resulting in a Failure, which limits the increase of the speed, makes the actual structure deviate from the theoretical design model. However, the an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
Inventor 邵俊鹏杨晓冬张艳芹于晓东王云飞徐晓秋孙桂涛李冲刘嘉
Owner HARBIN UNIV OF SCI & TECH
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