A method and device for calculating the physical property parameter value of hydraulic oil

CN115130053BActive Publication Date: 2025-09-19WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202210932229.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-04
Publication Date
2025-09-19
Estimated Expiration
2042-08-04

AI Technical Summary

Technical Problem

In the prior art, the physical properties of hydraulic oil are greatly affected by operating temperature and pressure, resulting in large errors in the estimated results and low accuracy when test conditions are not met or data are incomplete.

Method used

By obtaining parameters such as the kinematic viscosity, operating temperature, and fluid pressure of the hydraulic oil at different temperatures, the viscosity coefficient, dynamic viscosity, and bulk elastic modulus are calculated. Combined with the effects of temperature and pressure, the physical properties of the hydraulic pump can be accurately calculated.

Benefits of technology

The error between the hydraulic pump physical property parameter results and the actual results is reduced, and the accuracy of the parameter results is improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application discloses a method and device for calculating the physical property parameters of hydraulic oil, which are applied to the field of data processing. The method includes: obtaining parameters such as the kinematic viscosity of the hydraulic oil at a first temperature, the kinematic viscosity of the hydraulic oil at a second temperature, the operating temperature, the fluid pressure, the dynamic viscosity coefficient, parameters related to the bulk elastic modulus of the oil, the air polytropic constant, the reference atmospheric pressure, the density, the gas volume fraction, the bulk elastic modulus of the oil, and the like, and calculating and determining the physical property parameters of the hydraulic pump using these parameters. Thus, by taking into account the effects of temperature and pressure on the parameter values, the physical property parameters of the hydraulic pump calculated using these parameters have a smaller error than the actual results, resulting in a more accurate result. This reduces the error between the physical property parameter results of the hydraulic pump and the actual physical property parameter results, and improves the accuracy of the physical property parameter determination results.
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Citation Information

Patent Citations

  • Device for measuring viscosity of pressurized liquid gas fuel

    CN102175574A

  • Fluid discharge apparatus and fluid discharge method

    US20020025260A1