CN104048151A - 一种机油泵敞开内泄式限压阀 - Google Patents

一种机油泵敞开内泄式限压阀 Download PDF

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CN104048151A
CN104048151A CN201410289583.4A CN201410289583A CN104048151A CN 104048151 A CN104048151 A CN 104048151A CN 201410289583 A CN201410289583 A CN 201410289583A CN 104048151 A CN104048151 A CN 104048151A
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plunger
oil pump
snap ring
oil
groove
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CN104048151B (zh
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许仲秋
岳玉婷
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Hunan Oil Pump Co Ltd
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Hunan Oil Pump Co Ltd
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Abstract

本发明提供了一种机油泵敞开内泄式限压阀，包括位于机油泵泵体内的阀孔，所述阀孔内装有柱塞和弹簧，所述柱塞上设有泄油槽，所述阀孔壁设有泄油孔，在阀孔外装有一个对弹簧底部提供支撑的止动件，所述止动件通过螺栓固定在机油泵泵体上；所述柱塞上设有一圈凹槽，所述凹槽中装有卡环，所述柱塞上设有润滑泄油孔连接到用于安装卡环的凹槽处。上述技术方案中，用止动件取代了螺塞对弹簧进行支撑和固定，由于止动件位于阀孔的外面，用螺栓固定在机油泵的泵体上，因而使装配更加轻松，而且牢固耐用，同时在柱塞上安装卡环，卡环与阀孔壁形成油膜，能够避免空气进入吸油腔。

Description

一种机油泵敞开内泄式限压阀
技术领域
本发明涉及一种用于机油泵的敞开内泄式限压阀。
背景技术
常见的限压阀结构（见图1）包括柱塞、弹簧和螺塞，能够满足一般阀的性能，但是当弹簧的刚度较大时，装配力大，装配工艺难度大，而且螺塞在弹簧压力的作用下容易松动而失效。若限压阀为内泄式，一般会采用封闭结构，防止空气进入进油腔，螺塞的松动必然导致油泵空化而失效。
发明内容
本发明要解决的技术问题是提供一种装配容易、密封效果好的机油泵敞开内泄式限压阀。
为解决上述技术问题，本发明的技术方案是：一种机油泵敞开内泄式限压阀，包括位于机油泵泵体内的阀孔，所述阀孔内装有柱塞和弹簧，所述柱塞上设有泄油槽，所述阀孔壁设有泄油孔，在阀孔外装有一个对弹簧底部提供支撑的止动件，所述止动件通过螺栓固定在机油泵泵体上；所述柱塞上设有一圈凹槽，所述凹槽中装有卡环，所述柱塞上设有润滑泄油孔连接到用于安装卡环的凹槽处。
上述技术方案中，用止动件取代了螺塞对弹簧进行支撑和固定，由于止动件位于阀孔的外面，用螺栓固定在机油泵的泵体上，因而使装配更加轻松，而且牢固耐用，同时在柱塞上安装卡环，卡环与阀孔壁形成油膜，能够避免空气进入吸油腔。
附图说明
图1为常见的限压阀结构示意图；
图2为本发明的结构示意图；
图3为本发明的柱塞结构示意图；
图4为本发明的卡环结构示意图。
具体实施方式
如图2、3所示，本发明的优选实施例是：一种机油泵敞开内泄式限压阀，包括位于机油泵泵体内的阀孔5，所述阀孔5内装有柱塞1和弹簧2，所述柱塞1上设有四个泄油槽11，所述阀孔壁设有泄油孔6，在阀孔5外装有一个对弹簧2的底部提供支撑的止动件3，所述止动件3通过螺栓固定在机油泵泵体上；所述柱塞1上设有一圈凹槽，所述凹槽中装有卡环4，所述柱塞1上设有润滑泄油孔12连接到用于安装卡环的凹槽处。
本发明的工作原理是：限压阀未开启前，高压油通过柱塞润滑泄油孔12流到卡环4，卡环4向外塑性变形，减小柱塞1与阀孔5的间隙，卡环4外径与阀孔形成油膜，既防止空气进入吸油腔，又能防止柱塞1与阀孔5相对运动时干摩擦，同时通过卡环4变形保证柱塞1轴向运动，不偏向，减少柱塞1的窜动；阀开启之后，柱塞1上四个均布的泄油槽11能够保证泄油均匀，使柱塞不1偏磨。

Claims (1)

1.一种机油泵敞开内泄式限压阀，包括位于机油泵泵体内的阀孔，所述阀孔内装有柱塞和弹簧，所述柱塞上设有泄油槽，所述阀孔壁设有泄油孔，其特征在于：在阀孔外装有一个对弹簧底部提供支撑的止动件，所述止动件通过螺栓固定在机油泵泵体上；所述柱塞上设有一圈凹槽，所述凹槽中装有卡环，所述柱塞上设有润滑泄油孔连接到用于安装卡环的凹槽处。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107339473A (zh) * 2017-09-08 2017-11-10 湖南机油泵股份有限公司 一种二级限压阀
CN110159778A (zh) * 2019-06-03 2019-08-23 湖南机油泵股份有限公司 一种限压阀柱塞和避免压力波动的机油泵限压阀
CN115405710A (zh) * 2022-09-01 2022-11-29 唐山传奇科技有限公司 自闭式高速泄压阀

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* Cited by examiner, † Cited by third party
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US3669144A (en) * 1970-06-08 1972-06-13 Sheller Globe Corp Oil filter
US6062248A (en) * 1997-08-13 2000-05-16 Boelkins; Wallace G. Fluid flow-sensor and valve
CN102003386A (zh) * 2010-11-27 2011-04-06 湖南机油泵股份有限公司 环孔卸油阀机油泵
CN201787307U (zh) * 2010-08-18 2011-04-06 赵冬章 润滑泵卸压阀及使用该润滑泵卸压阀的润滑系统
CN204127630U (zh) * 2014-06-26 2015-01-28 湖南机油泵股份有限公司 一种机油泵敞开内泄式限压阀

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669144A (en) * 1970-06-08 1972-06-13 Sheller Globe Corp Oil filter
US6062248A (en) * 1997-08-13 2000-05-16 Boelkins; Wallace G. Fluid flow-sensor and valve
CN201787307U (zh) * 2010-08-18 2011-04-06 赵冬章 润滑泵卸压阀及使用该润滑泵卸压阀的润滑系统
CN102003386A (zh) * 2010-11-27 2011-04-06 湖南机油泵股份有限公司 环孔卸油阀机油泵
CN204127630U (zh) * 2014-06-26 2015-01-28 湖南机油泵股份有限公司 一种机油泵敞开内泄式限压阀

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107339473A (zh) * 2017-09-08 2017-11-10 湖南机油泵股份有限公司 一种二级限压阀
CN110159778A (zh) * 2019-06-03 2019-08-23 湖南机油泵股份有限公司 一种限压阀柱塞和避免压力波动的机油泵限压阀
CN115405710A (zh) * 2022-09-01 2022-11-29 唐山传奇科技有限公司 自闭式高速泄压阀
CN115405710B (zh) * 2022-09-01 2023-06-09 唐山传奇科技有限公司 自闭式高速泄压阀

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