An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves
In order to solve the problems in the existing gear pump with another trapped oil buffer groove, an external gear pump with axial stepped-gear structure for realizing two different contact ratios is proposed; the trapped-oil load flow from the gear section with a contact ratio greater than 1 is bala...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Transmission
2023-02-01
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| Series: | Jixie chuandong |
| Subjects: | |
| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2023.02.022 |
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| _version_ | 1841547010504654848 |
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| author | Wang Hao Song Anran Li Yulong |
| author_facet | Wang Hao Song Anran Li Yulong |
| author_sort | Wang Hao |
| collection | DOAJ |
| description | In order to solve the problems in the existing gear pump with another trapped oil buffer groove, an external gear pump with axial stepped-gear structure for realizing two different contact ratios is proposed; the trapped-oil load flow from the gear section with a contact ratio greater than 1 is balanced by the trapped-oil relief flow from the gear section with a contact ratio equal to 1, and the trapped-oil phenomenon will be fully alleviated; then the relief gap from the gear section with a contact ratio equal to 1 is calculated by 3D feature method, and the trapped-oil pressure formula is derived by making the trapped-oil load flow equal to the trapped-oil relief flow; finally, an example is demonstrated and validated by PumpLinx software. The results show that the flexible adjustment of the two section gear width ratio makes up for the shortage of the non-adjustable buffer capacity of the existing buffer groove, and has strong applicability to working conditions; the trapped oil pressure formula considering cavitation pressure corrects the negative pressure when the trapped oil expands, which is applicable to the trapped oil pressure calculation under any structure. It is concluded that the pump can effectively alleviate the trapped-oil phenomenon, doesn't need another buffer groove, has simple structure and is convenient for processing. |
| format | Article |
| id | doaj-art-1cfa278322974a38903b0a1f978eb49c |
| institution | Kabale University |
| issn | 1004-2539 |
| language | zho |
| publishDate | 2023-02-01 |
| publisher | Editorial Office of Journal of Mechanical Transmission |
| record_format | Article |
| series | Jixie chuandong |
| spelling | doaj-art-1cfa278322974a38903b0a1f978eb49c2025-01-10T14:57:03ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392023-02-014716416834892049An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-groovesWang HaoSong AnranLi YulongIn order to solve the problems in the existing gear pump with another trapped oil buffer groove, an external gear pump with axial stepped-gear structure for realizing two different contact ratios is proposed; the trapped-oil load flow from the gear section with a contact ratio greater than 1 is balanced by the trapped-oil relief flow from the gear section with a contact ratio equal to 1, and the trapped-oil phenomenon will be fully alleviated; then the relief gap from the gear section with a contact ratio equal to 1 is calculated by 3D feature method, and the trapped-oil pressure formula is derived by making the trapped-oil load flow equal to the trapped-oil relief flow; finally, an example is demonstrated and validated by PumpLinx software. The results show that the flexible adjustment of the two section gear width ratio makes up for the shortage of the non-adjustable buffer capacity of the existing buffer groove, and has strong applicability to working conditions; the trapped oil pressure formula considering cavitation pressure corrects the negative pressure when the trapped oil expands, which is applicable to the trapped oil pressure calculation under any structure. It is concluded that the pump can effectively alleviate the trapped-oil phenomenon, doesn't need another buffer groove, has simple structure and is convenient for processing.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2023.02.022Gear pumpTrapped-oil phenomenonWidth-ratio of stepped-gearTrapped-oil load flowTrapped-oil relief flowTrapped-oil pressure |
| spellingShingle | Wang Hao Song Anran Li Yulong An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves Jixie chuandong Gear pump Trapped-oil phenomenon Width-ratio of stepped-gear Trapped-oil load flow Trapped-oil relief flow Trapped-oil pressure |
| title | An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves |
| title_full | An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves |
| title_fullStr | An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves |
| title_full_unstemmed | An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves |
| title_short | An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves |
| title_sort | external gear pump with axial stepped gear structure and without additional trapped oil relief grooves |
| topic | Gear pump Trapped-oil phenomenon Width-ratio of stepped-gear Trapped-oil load flow Trapped-oil relief flow Trapped-oil pressure |
| url | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2023.02.022 |
| work_keys_str_mv | AT wanghao anexternalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves AT songanran anexternalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves AT liyulong anexternalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves AT wanghao externalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves AT songanran externalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves AT liyulong externalgearpumpwithaxialsteppedgearstructureandwithoutadditionaltrappedoilreliefgrooves |