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Article
Publication date: 20 April 2020

Hui Li, Heng Liu, Shemiao Qi and Yi Liu

The purpose of this paper is to introduce a high-speed rolling bearing test rig supported by sliding bearing and its first experimental results.

Abstract

Purpose

The purpose of this paper is to introduce a high-speed rolling bearing test rig supported by sliding bearing and its first experimental results.

Design/methodology/approach

Through analyzing the disadvantages of using rolling bearing as supporting bearing, the bottlenecks that need to be resolved urgently in the development of rolling bearing experimental technology, and the advantages of the sliding bearing, this study used the sliding bearing as the supporting bearing for the high-speed rolling bearing test rig for the purpose of prolonging the service life, increasing the load capacity and promoting the operating stability.

Findings

The experimental results show that the high-speed rolling bearing test rig supported by sliding bearing could stably rotate at 70,800 rpm without installing the test bearing; the temperature of the sliding bearing is increasing with the rotating speed and the maximum is less than 95°C. Moreover, the new test rig, installing an angular contact ball bearing as test bearing, could also stably rotate at 54,000 rpm with 2 kN axial load and 1 kN radial load; the temperature of the sliding bearing is increasing with the rotating speed and the maximum temperature is less than 97°C.

Practical implications

Rolling test rig has been established.

Originality/value

This paper proposes a high-speed rolling bearing test rig supported by sliding bearing, which greatly prolongs the service life, increases the load capacity and promotes the operating stability, moreover, reduces the risk of supporting bearing failure before the test bearing. This paper can also provide a new idea and reference for the design of similar bearing test rig.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0085/

Details

Industrial Lubrication and Tribology, vol. 72 no. 7
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 5 April 2018

Ting-Ling Lin, Heng-Yih Liu, Chi-Jui Huang and Yu-Chiung Chen

This paper aims to examine the effect of ownership structure and board gender diversity on charitable donations for a group of listed electronics companies in Taiwan.

Abstract

Purpose

This paper aims to examine the effect of ownership structure and board gender diversity on charitable donations for a group of listed electronics companies in Taiwan.

Design/methodology/approach

Using linear regression analysis, this paper analyses the ownership structure, board gender diversity and charitable donations of 380 Taiwanese electronics companies (2011-2013).

Findings

While domestic institutional investors, such as domestic mutual funds and corporate investors, take more of agency logic view, it negatively impacts on charitable donations. However, the empirical findings of this paper indicate that board gender diversity with the critical number of female directors was positively related to charitable donation. Thus, it is clear that female directors reaching critical numbers were taking more of a stakeholder view of institutional logic, emphasizing the balance of interests of internal and external stakeholders.

Research limitations/implications

This paper is limited to selected Taiwanese electronics companies over a two-year time frame, and charitable donations are the only proxy of corporate social responsibility (CSR) activity. The paper suggests that, as predicted by stakeholder theory and critical mass theory, companies with boards composed of at least three female directors make higher charitable donations.

Practical implications

This paper indicates that female directors on the board should have more voices on the board regarding the necessity and importance of CSR.

Originality/value

The paper contributes to existing literature by looking into the effects of ownership structure and board gender diversity on charitable donations.

Details

Corporate Governance: The International Journal of Business in Society, vol. 18 no. 4
Type: Research Article
ISSN: 1472-0701

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Article
Publication date: 21 January 2021

Hui Li, Hao Li, Rongfeng Zhang, Yi Liu, Shemiao Qi and Heng Liu

The purpose of this paper is to introduce the structure design process of the cantilever spindle with limited installation space and wishing to increase its critical speed.

Abstract

Purpose

The purpose of this paper is to introduce the structure design process of the cantilever spindle with limited installation space and wishing to increase its critical speed.

Design/methodology/approach

In this paper, the finite element method was used to analyze the influence of the supporting stiffness and the structure of the spindle on the critical speed, and then the structure of the spindle was designed; moreover, the experiment was accomplished and the experiment results show that the spindle can work stably.

Findings

Through analyzing the influence of the supporting stiffness and the structure of the spindle on the critical speed, the following conclusions could be obtained: the shape of the first-mode is the bend vibration of the cantilever of the spindle; the first-order critical speed of the spindle gradually decreases with the diameter and length of the cantilever increasing; the first-order critical speed of the spindle increases with the depth and diameter of the blind hole increasing; and the experiment was accomplished and the experiment results show that the spindle can work stably.

Originality/value

In this paper, the finite element method was used to design the spindle of the testing machine, and satisfactory results were obtained. It can provide a theoretical reference for the design of a similar spindle.

Details

Industrial Lubrication and Tribology, vol. 73 no. 2
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 19 May 2021

Nanshan Wang, Heng Liu and Yi Liu

The purpose of this study is to develop a normal contact stiffness (NCS) model among three disks of the assembled rotor system, which systematically considers the friction…

Abstract

Purpose

The purpose of this study is to develop a normal contact stiffness (NCS) model among three disks of the assembled rotor system, which systematically considers the friction coefficient, the asperities interaction and the elastoplastic contact regime.

Design/methodology/approach

Based on the revised fractal theory, considering the friction effect, the elastoplastic contact regime and the asperities interaction in a simple way, the total NCS among three disks of the rod-fastening rotor bearing system is established. Effects of fractal dimension and roughness, friction coefficient, asperities interaction and material properties on the normal stiffness are investigated by simulations and the relevant comparisons are given for examining the reasonability of the proposed model.

Findings

NCS will decrease when asperities interaction and friction are included. As the load increases, the influences of asperities interaction and friction on stiffness become serious. NCS will be enhanced when the elastoplastic regime is considered.

Originality/value

A comprehensive NCS model is developed. It provides a theoretical basis for the modeling of the NCS for multi-interfaces.

Details

Industrial Lubrication and Tribology, vol. 73 no. 4
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 4 April 2020

Hui Li, Heng Liu, Yi Liu, Shemiao Qi and Fengtao Wang

The purpose of this study is to investigate the dynamic behavior of the ball bearing with cage broken.

Abstract

Purpose

The purpose of this study is to investigate the dynamic behavior of the ball bearing with cage broken.

Design/methodology/approach

By analyzing the complicated relationship and interactions among the ball bearing elements, the dynamic modelling of the ball bearing with broken cage was established, and the dynamic simulations were conducted by solving the ball bearing dynamic equations using varying-step Runge–Kutta integration.

Findings

The computational results show that there is considerable distinguishment in the dynamic characteristics between the normal cage and the broken cage of the bears. The broken cage makes the trajectory of the cage erratic, and the vibration amplitude is much bigger than that of the normal cage, which makes the motion of the cage unstable. When one of the cage lintels breaks up, the two adjacent balls will collide with each other; what is worse, this may make the balls crush because of the high amplitude of the collision force. The broken cage makes the cage-race interaction force much larger than that of the normal cage, which could promote the guiding ring and quicken the cage wear-failure.

Originality/value

This study can provide important ideas for the fault identification of the ball bearing with cage broken.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2020-0042/

Details

Industrial Lubrication and Tribology, vol. 72 no. 7
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 13 August 2019

Zisheng Guo, Jianqi Zhang and Heng Liu

Small firms in China anticipate entrepreneurial opportunities for continual growth. However, they may fail to recognize opportunities because of their inefficiency in…

Abstract

Purpose

Small firms in China anticipate entrepreneurial opportunities for continual growth. However, they may fail to recognize opportunities because of their inefficiency in managing their knowledge.

Design/methodology/approach

In this explorative paper, the authors assess the opportunity recognition efficiency of 168 small Chinese firms using data envelopment analysis (DEA). Supplementary Tobit regressions were conducted for further exploring the factors that influence the firms’ efficiency in opportunity recognition.

Findings

Results from the DEA suggest that most respondents recognize significantly fewer opportunities than those with equivalent knowledge stock. Moreover, many firms have low levels of pure technical efficiency but high levels of scale efficiency, indicating insufficient use of knowledge as a major reason for inefficiency in opportunity recognition. The Tobit regressions show that sales and research and development intensity are relevant to a firm’s opportunity recognition efficiency.

Research limitations/implications

This study calls for the investigation of efficiency issues in opportunity recognition and suggests that managers guard against unwarranted loss of opportunities owing to inefficient use of existing knowledge elements.

Originality/value

First, the authors introduce the concept of opportunity recognition efficiency within the entrepreneurial process. Second, they manifest the role of knowledge management in opportunity recognition. Third, they introduce DEA to investigate the relationship between knowledge stock and opportunity recognition. Fourth, this study reveals that inefficient use of knowledge is a disadvantage of small Chinese firms in terms of opportunity recognition.

Details

Chinese Management Studies, vol. 13 no. 4
Type: Research Article
ISSN: 1750-614X

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Article
Publication date: 28 December 2020

Nanshan Wang, Heng Liu, Qidan Wang, Shemiao Qi and Yi Liu

This study aims to obtain the dynamic behaviours of cracked rod-fastening rotor bearing system (RFBS), and experimental investigation was carried out to examine the…

Abstract

Purpose

This study aims to obtain the dynamic behaviours of cracked rod-fastening rotor bearing system (RFBS), and experimental investigation was carried out to examine the dynamic characteristics of this kind of assembled rotor bearing system with a transverse crack passing through the critical speed.

Design/methodology/approach

An experimental test rig of cracked RFBS was established for examining the vibration behaviours between intact and cracked system. The crack on the surface of a fastening rod was simulated by wire-electrode cutting processing method. The comprehensive analysis method of vibration was used to obtain the dynamic characteristics such as vibration amplitude, acceleration and whirling orbits before and after the critical speed as well as the instantaneous response in the process of speed up.

Findings

Some experimental vibration datum is obtained for cracked RFBS. The appearance of a crack will introduce the initial bending and make the vibration amplitude, acceleration and instant response in the process of speed up increase greatly as well as the change of whirling orbits.

Originality/value

The actual vibration characteristics for this complex assembled rotor system with a transverse crack are given passing through the critical speed. It can provide some useful help for monitoring the vibration behaviours of this kind of assembled rotor system as well as the detection of the crack fault.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0260/

Details

Industrial Lubrication and Tribology, vol. 73 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 13 April 2020

Hui Li, Heng Liu, Hao Li, Shemiao Qi, Yi Liu and Fengtao Wang

The purpose of this paper is to investigate the effect of the cage-pocket wear on the dynamic behavior of the ball bearing.

Abstract

Purpose

The purpose of this paper is to investigate the effect of the cage-pocket wear on the dynamic behavior of the ball bearing.

Design/methodology/approach

Through analyzing the complicated relationship and interactions among the ball bearing elements, the dynamic modeling of the ball bearing was established considering the gravity, drag force from the oil, hydrodynamic effect on the cage and the dynamic simulations with different amounts of the cage-pocket wear loss of the ball bearing (BPWL) were obtained by solving the ball bearing dynamic equations using Runge–Kutta method.

Findings

The results show that the trajectory of the cage’s centroid presents two vibration modes with different amplitudes. In addition, those two different forms of trajectory of different amplitudes emerge alternatively with BPWL increase moreover the diameter of the trajectory decrease significantly with the BPWL increasing, which is consistent with the experimental result and last BPWL has lightly effect on the average skidding ratio of the cage, however, the BPWL would produce significant effects on the fluctuation of the skidding ratio, which can directly reflect the stability of motion to a certain extent.

Originality/value

Practice shows that the bearing failure resulting from the cage accounts for 25 per cent of the total failure of the rolling bearings. However, few discussions about how the wear of the cage-pocket would influence the dynamic characteristics of the cage. This study can provide important ideas for the design of bearing cage-pocket size and the fault identification of the ball bearing to decrease the failure rate caused by the cage.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2019-0535/

Details

Industrial Lubrication and Tribology, vol. 72 no. 7
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 21 October 2020

Nanshan Wang, Heng Liu, Yi Liu, Qidan Wang, Shemiao Qi and Zhidong Xu

This paper aims to examine the dynamic behaviours of a three-dimensional (3D) rod-fastening rotor bearing system (RFBS) with a crack in a fastening rod.

Abstract

Purpose

This paper aims to examine the dynamic behaviours of a three-dimensional (3D) rod-fastening rotor bearing system (RFBS) with a crack in a fastening rod.

Design/methodology/approach

Based on the 3D finite element method model and stress analysis of a cracked RFBS, a 3D dynamic model of the RFBS with a crack in a fastening rod is established with considering the initial bending and stress redistribution caused by the crack. A combined numerical simulation technology is used to investigate the dynamic behaviours of the system.

Findings

The distribution of contact stress between the two disks will be not uniform, and the initial bending of the system will occur due to the presence of a crack. This will lead to the change of system stiffness and the dynamic behaviours such as vibration amplitude, and motion orbits will change significantly.

Research limitations/implications

A 3D finite element method dynamic model is proposed for the study of dynamic characteristics of complex combined rotor bearing system with cracks.

Practical implications

It is helpful and significant to master the dynamic behaviours of cracked RFBS. It is helpful to detect the presence of a crack of the rotor bearing system.

Social implications

Some of the losses caused by crack failure may be reduced.

Originality/value

The proposed 3D method can provide a useful reference for the study of dynamic characteristics of complex combined rotor bearing system with cracks.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2020-0189

Details

Industrial Lubrication and Tribology, vol. 73 no. 2
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 4 November 2021

Liang Wu, Heng Liu and Yongchuan Bao

This paper aims to explore how manufacturing firms pursue business model innovation (BMI) through their use of outside-in thinking.

Abstract

Purpose

This paper aims to explore how manufacturing firms pursue business model innovation (BMI) through their use of outside-in thinking.

Design/methodology/approach

Survey data were collected on 175 Chinese manufacturing firms. A regression model was used to verify the research results.

Findings

Manufacturing firms rely on outside-in thinking to develop BMI under different market and institutional environments. From a whole-value-chain perspective, interacting with customers and sharing information with suppliers are two key ways to develop BMI.

Research limitations/implications

Firms focus on customer needs, sense the dynamics of external markets and technology and seize market opportunities to measure outside-in thinking. Empirical results suggest using other measures of outside-in thinking. BMI itself can be multidimensional, so scholars could consider BMI’s diverse dimensions and measurements, which may demand different kinds of outside-in thinking.

Practical implications

Manufacturing firms can use outside-in thinking to overcome inertia and rigidity and increase their knowledge, information and technology. Managers should develop outside-in thinking to respond quickly to emerging economies. Managers should use value chain collaboration and improve the firm’s capacity to interact with customers and suppliers to apply the benefits of outside-in thinking to their BMI.

Originality/value

The study explores how outside-in thinking is a key driver of BMI. Applying the whole-value-chain view, it finds that interacting with customers and suppliers connects outside-in thinking with BMI. It also highlights the effects of intense market competition and volatile government regulation on BMI.

Details

Journal of Business & Industrial Marketing, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0885-8624

Keywords

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