Xiao-dong Yu, Lei Geng, Xiao-jun Zheng, Zi-xuan Wang and Xiao-gang Wu
Rotational speed and load-carrying capacity are two mutual coupling factors which affect high precision and stable operation of a hydrostatic thrust bearing. The purpose of this…
Abstract
Purpose
Rotational speed and load-carrying capacity are two mutual coupling factors which affect high precision and stable operation of a hydrostatic thrust bearing. The purpose of this paper is to study reasonable matching relationship between the rotational speed and the load-carrying capacity.
Design/methodology/approach
A mathematical model of relationship between the rotational speed and the load-carrying capacity of the hydrostatic bearing with double-rectangle recess is set up on the basis of the tribology theory and the lubrication theory, and the load and rotational speed characteristics of an oil film temperature field and a pressure field in the hydrostatic bearing are analyzed, reasonable matching relationship between the rotational speed and the load-carrying capacity is deduced and a verification experiment is conducted.
Findings
By increasing the rotational speed, the oil film temperature increases, the average pressure decreases and the load-carrying capacity decreases. By increasing the load-carrying capacity, the oil film temperature and the average pressure increases and the rotational speed decreases; corresponding certain reasonable matching values are available.
Originality/value
The load-carrying capacity can be increased and the rotational speed improved by means of reducing the friction area of the oil recess by using low-viscosity lubricating oil and adding more oil film clearance; but, the stiffness of the hydrostatic bearing decreases.
Details
Keywords
This study aims to provide a review of corporate governance in China because effective and strong corporate governance is necessary for the efficient functioning and long-term…
Abstract
Purpose
This study aims to provide a review of corporate governance in China because effective and strong corporate governance is necessary for the efficient functioning and long-term sustainability of financial markets and corporations.
Design/methodology/approach
The author provides a literature review of corporate governance in China through themes such as the concentration of state ownership, the degree of independence among board directors, insider trading, quality of financial disclosures and the maturity of capital markets.
Findings
The author reviews empirical work surrounding key corporate governance variables and identifies avenues for future research. The author finds that corporate governance mechanisms exhibit implications for firm performance, fraud, capital retention, financial constraints, institutional investors, auditing and the quality of financial disclosures. In addition, the author reviews evidence documenting the importance of independent board directors in regulation and ethical conduct.
Originality/value
The literature review contributes to the growing literature on responsible corporate governance and provides further understanding of the importance of business ethics for promoting the integrity and long-term sustainability of China’s capital markets and corporations and to ensure that company assets are used efficiently and productively in the best interests of investors and other stakeholders. This study offers insights to policy-makers interested in enhancing the quality of corporate governance within their nation. In addition, it provides a macro-level perspective for executives of multinational firms to consider if they are considering making a direct investment in China.