Investigation of the friction-induced vibration of a novel four-way reversing valve using spectral kurtosis and number of peaks spectrum

Wang, Huan; Lai, Zhounian; Wu, Dazhuan; Zhang, Kepeng; Zheng, Mingchao

doi:10.1016/j.ymssp.2021.108425

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…Wang et al [ 31 ] define SK based on Wold–Crammer decomposition, which describes any random non-stationary process as the output of a causal, linear, and time-varying system, i.e.,

…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Bearing-Fault-Feature Enhancement and Diagnosis Based on Coarse-Grained Lattice Features

Li,

Jia,

Liao

et al. 2024

Sensors

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In view of the frequent failures occurring in rolling bearings, the strong background noise present in signals, weak features, and difficulties associated with extracting fault characteristics, a method of enhancing and diagnosing rolling bearing faults based on coarse-grained lattice features (CGLFs) is proposed. First, the vibrational signals of bearings are subjected to adaptive filtering to eliminate background noise. Second, frequency-domain transformation is performed, and a coarse-grained approach is used to continuously segment the spectrum. Within each segment, amplitude-enhancement operations are executed, transforming the data into a CGLF graph that enhances fault characteristics. This graph is then fed into a Swin Transformer-based pattern-recognition network. Third and finally, a high-precision fault diagnosis model is constructed using fully connected layers and Softmax, enabling the diagnosis of bearing faults. The fault recognition accuracy reaches 98.30% and 98.50% with public datasets and laboratory data, respectively, thereby validating the feasibility and effectiveness of the proposed method. This research offers an efficient and feasible fault diagnosis approach for rolling bearings.

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“…Wang et al [ 31 ] define SK based on Wold–Crammer decomposition, which describes any random non-stationary process as the output of a causal, linear, and time-varying system, i.e.,

…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Bearing-Fault-Feature Enhancement and Diagnosis Based on Coarse-Grained Lattice Features

Li,

Jia,

Liao

et al. 2024

Sensors

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“…The medium at the inlet (D tube) is from the compressor for the air conditioning system, which is the gas state with high temperature and pressure, while at the outlet (E-S tubes), the medium is a mixture of gas and liquid. The purpose of this article is the study of reversing performance, rather than the study of the two-phase flow; we have paid more attention to the pressure induced by the flow, thus, the medium is simplified to the gas state [19]. The calculated flow medium is refrigerant R410A, which is modeled in the gas state, and the corresponding thermal and physical parameters are obtained from the NIST REFPROP software, version 10.0.…”

Section: Simulation Modelmentioning

confidence: 99%

“…F r is the positive pressure of the slider, µ is the kinetic friction factor, only related to the material and roughness of the contact surface, F r is defined here as the resistance of the slider. Therefore, the reversing performance of the reversing valves depends on the thrust F t and resistance F r of the slider [19].…”

Section: Further Investigation Of Slider Structure On the Reversing P...mentioning

confidence: 99%

Investigation of Effects of Slider Structure on the Reversing Performance of Four-Way Reversing Valve

Zhang

Wang

et al. 2023

Processes

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Unsmooth reversing is one of the most common faults in the four-way reversing valve of the air conditioning system, and the airflow in the valve chamber and the shape of the slider of the reversing valve are the main factors in unsmooth reversing. In order to study the influence of the airflow in the chamber and the slider shape on the reversing process, the fluid flow in the valve chamber of a four-way reversing valve is obtained using computational fluid dynamics (CFD) simulations, and the influence of the slider structure on slider thrust and resistance of the four-way reversing valve is analyzed. Four-way reversing valves with no-cutting, straight-cutting and arc-cutting sliders are employed to evaluate the reversing characteristics. A pressure measuring device for a four-way reversing valve chamber is designed, which is performed to test the chamber pressure of three different types of sliders of four-way reversing valves. The maximum error of experimental tests and simulations is within 5% of engineering tolerance, so as to verify the reliability of numerical simulation. The resistance-to-thrust ratio of the slider is raised to evaluate the performance of the reversing, which can guide the design of the valve and slider. The results indicate that the chamber pressure and resistance-thrust ratio with the cutting slider are reduced, which is beneficial to the reversing of the four-way reversing valve. Compared with the straight-cutting structure, the arc-cutting slider four-way reversing valve has a more stable reversing process and better comprehensive reversing performance. Results demonstrate that both the straight-cutting structure and arc-cutting structure of the slider can improve the process performance but the arc-cutting slider is better.

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“…Vibrations have many negative effects and often cause vibrations of control elements in hydraulic valves (Wang et al, 2022;Bouzidi et al, 2018;Awad & Parrondo, 2020). These elements are responsible for regulating the gap size in the hydraulic valves.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Mechanical Vibrations on Hydraulic Valves and the Possibility of Reducing the Effects

Stosiak,

Skačkauskas,

Deptuła

2024

Aviation

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The paper shows that mechanical vibrations occur in a wide frequency range in the hydraulic systems operating in the real world. Hydraulic valves are also exposed to these vibrations. The paper gives examples of vibration sources and suggests that the influence of vibrations on hydraulic valves could be reduced. Particular attention was paid to the vibrating proportional distributor. The amplitude-frequency spectrum of pressure pulsation in a hydraulic system with a vibrating proportional distributor was analysed. During the tests, the frequency of external mechanical vibrations acting on the proportional distributor and their direction was changed.

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Investigation of the friction-induced vibration of a novel four-way reversing valve using spectral kurtosis and number of peaks spectrum

Cited by 12 publications

References 22 publications

Bearing-Fault-Feature Enhancement and Diagnosis Based on Coarse-Grained Lattice Features

Bearing-Fault-Feature Enhancement and Diagnosis Based on Coarse-Grained Lattice Features

Investigation of Effects of Slider Structure on the Reversing Performance of Four-Way Reversing Valve

The Impact of Mechanical Vibrations on Hydraulic Valves and the Possibility of Reducing the Effects

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