Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement

In order to effectively relieve the trapped-oil phenomenon of external gear-pumps and gear-motors, based on its constant output capacity, by analyzing the influence of large modulus under equal displacement on the load flow, leakage flow and unloading flow in trapped-oil chamber, a design method of...

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Main Authors: Liu Ping, Li Yulong, Song Anran
Format: Article
Language:zho
Published: Editorial Office of Journal of Mechanical Transmission 2024-06-01
Series:Jixie chuandong
Subjects:
Online Access:http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2024.06.013
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author Liu Ping
Li Yulong
Song Anran
author_facet Liu Ping
Li Yulong
Song Anran
author_sort Liu Ping
collection DOAJ
description In order to effectively relieve the trapped-oil phenomenon of external gear-pumps and gear-motors, based on its constant output capacity, by analyzing the influence of large modulus under equal displacement on the load flow, leakage flow and unloading flow in trapped-oil chamber, a design method of large modulus with equal displacement is proposed. Based on the instantaneous balance of these three flows, and the deductive calculation of the unloading area under different modules with the same tooth profile parameters, the trapped-oil pressure is calculated and the relief degree of the trapped-oil phenomenon is judged. The results show that the tooth width coefficient under equal displacement is inversely proportional to the third power of the modulus for a given gear-pairs and working conditions, the larger the modulus is, the more the trapped-oil phenomenon tends to be relieved, and the smaller the radial force is, the smaller the tooth width coefficient will be. The unloading area under different modules and the same tooth shape parameter is equal to the module square multiplied by the unloading area under the reference module of 1, which provides great convenience for calculating the unloading area under different modules with the same tooth profile parameters.The inlet and outlet pressures outside the unloading groove are reversed, leading to a more serious trapped-oil phenomenon in the gear-pump than in the gear-motor, but the small modulus motor also shows more serious trapped-oil phenomenon. It is concluded that the maximized or larger modules is included in the gear-pump and gear-motor design criteria.
format Article
id doaj-art-e32679db4f804296b5708e1d937599d8
institution Kabale University
issn 1004-2539
language zho
publishDate 2024-06-01
publisher Editorial Office of Journal of Mechanical Transmission
record_format Article
series Jixie chuandong
spelling doaj-art-e32679db4f804296b5708e1d937599d82025-01-10T15:00:40ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392024-06-0148838862028206Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal DisplacementLiu PingLi YulongSong AnranIn order to effectively relieve the trapped-oil phenomenon of external gear-pumps and gear-motors, based on its constant output capacity, by analyzing the influence of large modulus under equal displacement on the load flow, leakage flow and unloading flow in trapped-oil chamber, a design method of large modulus with equal displacement is proposed. Based on the instantaneous balance of these three flows, and the deductive calculation of the unloading area under different modules with the same tooth profile parameters, the trapped-oil pressure is calculated and the relief degree of the trapped-oil phenomenon is judged. The results show that the tooth width coefficient under equal displacement is inversely proportional to the third power of the modulus for a given gear-pairs and working conditions, the larger the modulus is, the more the trapped-oil phenomenon tends to be relieved, and the smaller the radial force is, the smaller the tooth width coefficient will be. The unloading area under different modules and the same tooth shape parameter is equal to the module square multiplied by the unloading area under the reference module of 1, which provides great convenience for calculating the unloading area under different modules with the same tooth profile parameters.The inlet and outlet pressures outside the unloading groove are reversed, leading to a more serious trapped-oil phenomenon in the gear-pump than in the gear-motor, but the small modulus motor also shows more serious trapped-oil phenomenon. It is concluded that the maximized or larger modules is included in the gear-pump and gear-motor design criteria.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2024.06.013Gear-pump and gear-motorRelief of trapped-oil phenomenonLarge modulus with equal displacementTooth width coefficientTrapped-oil pressure
spellingShingle Liu Ping
Li Yulong
Song Anran
Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
Jixie chuandong
Gear-pump and gear-motor
Relief of trapped-oil phenomenon
Large modulus with equal displacement
Tooth width coefficient
Trapped-oil pressure
title Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
title_full Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
title_fullStr Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
title_full_unstemmed Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
title_short Large Modulus Method to Effectively Relieve Trapped-oil Phenomenon for Gear-pump and Gear-motor with Equal Displacement
title_sort large modulus method to effectively relieve trapped oil phenomenon for gear pump and gear motor with equal displacement
topic Gear-pump and gear-motor
Relief of trapped-oil phenomenon
Large modulus with equal displacement
Tooth width coefficient
Trapped-oil pressure
url http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2024.06.013
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AT liyulong largemodulusmethodtoeffectivelyrelievetrappedoilphenomenonforgearpumpandgearmotorwithequaldisplacement
AT songanran largemodulusmethodtoeffectivelyrelievetrappedoilphenomenonforgearpumpandgearmotorwithequaldisplacement