# Influence of Installation Deviation of Thrust Bearing on Oil Film Flow of 1000 MW Hydraulic Turbine Unit

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## Abstract

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## 1. Introduction

## 2. Numerical Techniques

#### 2.1. Continuity Equation

#### 2.2. Navier–Stokes Equations

#### 2.3. Energy Equation

#### 2.4. SST k-ω Turbulence Model

#### 2.5. Viscosity Temperature Equation

## 3. Theoretical Model

#### 3.1. Model of the Oil Film

#### 3.2. Thrust Bearing THD Model

#### 3.3. Model Considering Radial and Circumferential Deviation

## 4. Results and Discussion

#### 4.1. Flow Characteristics

#### 4.2. Relationship between Load and Inclination Angle

#### 4.3. Oil Film Characteristics under Different Working Conditions

#### 4.4. Influence of Deviation

## 5. Conclusions

- (a)
- Under the action of wedge-shaped oil film, the axial force increases with the increase of the inclination angle, but the temperature and pressure also increase, which may lead to safety risks to a certain extent. Through calculation, under the optimum operating condition, the inclination angle is 0.0039 degrees; under rated condition, the inclination angle is 0.0037 degrees.
- (b)
- The numerical results show that the axial force $F$ of the bearing decreases with the increase of radial installation deviation $d$. The axial force $F$ is basically constant with the increase of circumferential deviation $\alpha $. Therefore, it is more important to pay attention to the radial installation deviation during the installation.

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Acknowledgments

## Conflicts of Interest

## References

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**Figure 1.**Thrust bearing structure [14].

Item | Value |
---|---|

Pad inner radius R_{1}/mm | 1770 |

Pad outer radius R_{2}/mm | 2515 |

Fluid domain inner radius R_{3}/mm | 1670 |

Fluid domain outer radius R_{4}/mm | 3525 |

Pad thickness H_{1}/mm | 55 |

Support tile thickness H_{2}/mm | 80 |

Tank height H_{3}/mm | 811 |

Inclination $\mathit{\theta}$ | Maximum Thickness/mm (Left) | Minimum Thickness/mm (Right) |
---|---|---|

0.0030 | 0.1 | 0.066 |

0.0033 | 0.1 | 0.063 |

0.0036 | 0.1 | 0.059 |

0.0039 | 0.1 | 0.056 |

0.0042 | 0.1 | 0.052 |

0.0045 | 0.1 | 0.049 |

Number of Oil Film Mesh Layers | Mesh Number | Axial Force
$\mathit{F}$/t |
---|---|---|

12-layer | 204,534 | 2108.31 |

10-layer | 152,960 | 2057.23 |

7-layer | 132,155 | 1864.51 |

6-layer | 125,220 | 1732.93 |

3-layer | 104,415 | 1573.12 |

Conditions | Hydraulic Thrust ${\mathit{F}}_{\mathit{h}}$/t | Axial Force $\mathit{F}$/t | Inclination $\mathit{\theta}$/° |
---|---|---|---|

Optimum operating condition | 653 | 2027 | 0.0039 |

Minimum head condition | 786 | 1895 | 0.0038 |

Maximum head condition | 694 | 1987 | 0.0039 |

Rated condition | 1020 | 1660 | 0.0037 |

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## Share and Cite

**MDPI and ACS Style**

Ji, Z.; Shi, Y.; Da, X.; Cao, J.; Gong, Q.; Wang, Z.; Huang, X.
Influence of Installation Deviation of Thrust Bearing on Oil Film Flow of 1000 MW Hydraulic Turbine Unit. *Water* **2023**, *15*, 1649.
https://doi.org/10.3390/w15091649

**AMA Style**

Ji Z, Shi Y, Da X, Cao J, Gong Q, Wang Z, Huang X.
Influence of Installation Deviation of Thrust Bearing on Oil Film Flow of 1000 MW Hydraulic Turbine Unit. *Water*. 2023; 15(9):1649.
https://doi.org/10.3390/w15091649

**Chicago/Turabian Style**

Ji, Zhenwei, Yishu Shi, Xinming Da, Jingwei Cao, Qijun Gong, Zhengwei Wang, and Xingxing Huang.
2023. "Influence of Installation Deviation of Thrust Bearing on Oil Film Flow of 1000 MW Hydraulic Turbine Unit" *Water* 15, no. 9: 1649.
https://doi.org/10.3390/w15091649