CN102400913A - 一种密封型齿形型线螺杆 - Google Patents

一种密封型齿形型线螺杆 Download PDF

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CN102400913A
CN102400913A CN2011103342755A CN201110334275A CN102400913A CN 102400913 A CN102400913 A CN 102400913A CN 2011103342755 A CN2011103342755 A CN 2011103342755A CN 201110334275 A CN201110334275 A CN 201110334275A CN 102400913 A CN102400913 A CN 102400913A
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circular arc
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CN102400913B (zh
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徐树林
洪灶成
徐建军
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HUANGSHAN ZONTO PUMPS MANUFACTURING Co Ltd
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Abstract

本发明涉及一种适合双螺杆泵的密封型齿形型线螺杆，包括主、从螺杆，所述主、从螺杆端截面由底圆、节圆与外圆组成，主、从螺杆的齿形型线啮合且相同，所述的齿形型线由圆弧ab、摆线bc、圆弧cd与斜线de四部分连续组成；所述的主螺杆上的C点与从螺杆上的摆线bc共厄；所述的圆弧ab与螺杆底圆在轴截面上相切；所述的圆弧cd与斜线de分别与螺杆外圆对接。本发明齿形型线简单、圆滑，提高了螺杆泵的机械效率与螺杆泵的容积率。

Description

一种密封型齿形型线螺杆
 
技术领域
本发明涉及一种双螺杆，尤其涉及一种双螺杆泵密封型齿形型线的设计技术。
 
背景技术
螺杆泵是石油、化工、造纸等行业中应用于输送粘稠液体或带颗粒状的液体而普遍采用的装置，螺杆泵是由主从螺杆的相互啮合以及螺杆与衬筒内壁的紧密配合，在泵的吸入口和排出口之间，就会被分隔成一个或多个密封空间，再利用螺杆的回转实现吸排液体。现有技术中，由于泵的适用范围不同，从而使螺杆泵螺杆的齿形型线也各有不同，有A型、B型、C型、D型等，这些齿形型线在运用过程中存在以下问题：
1、啮合关系复杂，齿形啮合型线由二段及三段以上组成，主从螺杆螺旋头数、导程等有相应的规定等，从而直接降低了螺杆机械工作效率；
2、在螺杆轴截面上，齿形型线与螺杆外圆、底圆连接不圆滑，不利于螺杆的硬化热处理；
3、螺杆啮合后的相邻齿槽因齿形本身的泄漏三角形缺陷而彼此连通，从而降低了泵的容积效率；
4、在运用中因螺杆工作间隙的存在，齿啮合关系与设计严重偏离，从而降低了螺杆的设计性能指标。
 
发明内容
本发明的目的在于克服现有技术中的缺点，提供一种具有新型密封型齿形型线，可以使齿啮合关系严密，啮合后形成的齿槽互不相通，从而保证螺杆的设计性能指标和提高泵的容积效率。
为了实现上述目的，本发明是采用如下技术方案来实现的，一种密封型齿形型线螺杆，包括主、从螺杆，所述主、从螺杆端截面由底圆、节圆与外圆组成，主、从螺杆的齿形型线相同，所述的齿形型线由圆弧ab、摆线bc、圆弧cd与斜线de四部分连续组成；所述的主螺杆上的C点与从螺杆上的摆线bc共厄；所述的圆弧ab与螺杆底圆在轴截面上相切；所述的圆弧cd与斜线de分别与螺杆外圆对接。
所述的主、从螺杆的齿形型线相互对称。
所述的斜线de与螺杆外圆的夹角为3~10°。
所述的圆弧ab的半径为0.2~0.4mm，圆弧cd的半径为0.3~0.5mm。
采用本发明的齿形型线螺杆，由于ab线、cd线、de线，确保螺杆工作间隙下，主、从螺杆的齿形在啮合时不被破坏；由于主螺杆上的c点与从螺杆上的摆线bc共厄， c、b两点又在同一条径向线上，从而使摆线bc作螺杆型面的发生线所形成的螺旋面不仅符合啮合原理，而且，使得螺杆泵在使用时达到更好地密封效果，使得双螺杆泵真正成为密封型容积泵。圆弧ab与螺杆底圆在轴截面上相交且相切，便于齿面的热处理。圆弧ab、圆弧cd实现了运转中必须的径向间隙不破坏螺杆型线的啮合关系，同时使得螺杆型面与螺杆底部、顶部圆滑过度。斜线de及其与螺杆外圆的夹角缩短了螺杆外圆与孔的接触线长度，尤其在气液固混输工况更便于干气输送时的外部引流润滑，能极大地提高泵的运转性能。
本发明与现有技术相比，具有显著的优点：
1、提高了螺杆泵的容积率；
2、本发明齿形型线简单、圆滑，提高了螺杆泵的机械效率；
3、摆线bc与螺杆与外圆的交接处用圆弧cd与斜线de构成，减少了螺杆与孔的摩擦面积，还增添了形成油锲的功能；
4、本发明可用于高含气率、高压比工况下的油气混输。
 
附图说明
下面结合附图和具体实施方式对本发明作进一步的详细说明。
图1是密封型齿形结构轴截面示意图；
图2是密封型齿形型线曲线示意图；
图3主、从螺杆型面啮合示意图。
 
具体实施方式
图1所示的是螺杆的密封型齿形结构轴截面示意图，齿形型线由圆弧ab、摆线bc、圆弧cd与斜线de四部分连续组成，齿形型线相互对称。摆线bc与螺杆与外圆的交接处用圆弧cd与斜线de构成，减少了螺杆与孔的摩擦面积，还增添了形成油锲的功能；ab线、cd线、de线，确保螺杆工作间隙下，bc线不被破坏，从而保证泵的工作参数的稳定性。
图2是螺杆的密封型齿形型线曲线示意图，齿形型线由圆弧ab、摆线bc、圆弧cd与斜线de四部分连续组成，按主从螺杆齿形大小相同，型面相同，旋向相反进行啮合的条件，确定摆线bc的定圆与动圆，使得c、b两点在同一条径向线上，从而使摆线bc作螺杆型面的发生线所形成的螺旋面不仅符合啮合原理，而且，使得螺杆泵在使用时达到更好地密封效果。圆弧ab的半径R2为0.3mm，圆弧cd的半径R1为0.5mm，实现了运转中必须的径向间隙不破坏螺杆的啮合关系，同时使得螺杆型面与螺杆底部、顶部圆滑过度。斜线de与螺杆外圆的夹角θ为8°，缩短了螺杆外圆与孔的接触线长度，在气液固混输工况更便于干气输送时的外部引流润滑，能极大地提高泵的运转性能。
图3是主、从螺杆型面啮合示意图，其密封型齿形型线相互啮合完全密封，没有形成相邻齿槽之间的泄漏三角形。
以上实施例并非仅限于本发明的保护范围，所有基于本发明的基本思想而进行修改或变动的都属于本发明的保护范围内。

Claims (4)

1.一种密封型齿形型线螺杆，包括主、从螺杆，所述主、从螺杆端截面由底圆、节圆与外圆组成，主、从螺杆的齿形型线啮合且相同，其特征在于：所述的齿形型线由圆弧ab、摆线bc、圆弧cd与斜线de四部分连续组成；所述的主螺杆上的C点与从螺杆上的摆线bc共厄；所述的圆弧ab与螺杆底圆在轴截面上相切；所述的圆弧cd与斜线de分别与螺杆外圆对接。
2.根据权利要求1所述的一种密封型齿形型线螺杆，其特征在于：所述的主、从螺杆的齿形型线相互对称。
3.根据权利要求1所述的一种密封型齿形型线螺杆，其特征在于：所述的斜线de与螺杆外圆的夹角为3~10°。
4.根据权利要求1所述的一种密封型齿形型线螺杆，其特征在于：所述的圆弧ab的半径为0.2~0.4mm，圆弧cd的半径为0.3~0.5mm。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108869272A (zh) * 2018-08-20 2018-11-23 天津泵业机械集团有限公司 螺杆泵啮合齿型中从动螺杆齿型尖角处倒棱型线结构

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JPS58155288A (ja) * 1982-03-11 1983-09-14 Shigeyoshi Osada 改良型クインビ−ポンプ
CN2358252Y (zh) * 1999-02-03 2000-01-12 天津市科技投入公司 具有新齿形型线的双螺杆泵螺杆
CN2771521Y (zh) * 2005-01-14 2006-04-12 陈金海 一种双螺杆泵螺杆的优化型线
CN101082337A (zh) * 2007-07-03 2007-12-05 浙江大学 一种对称形大流量螺杆式空压机的螺杆型线
CN201301806Y (zh) * 2009-05-05 2009-09-02 重庆大学 大流量高压螺杆泵
CN101576079A (zh) * 2009-06-12 2009-11-11 天津泵业机械集团有限公司 双螺杆泵螺杆齿形
CN202301015U (zh) * 2011-10-29 2012-07-04 黄山众拓工业泵制造有限公司 一种密封型齿形型线螺杆

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* Cited by examiner, † Cited by third party
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JPS58155288A (ja) * 1982-03-11 1983-09-14 Shigeyoshi Osada 改良型クインビ−ポンプ
CN2358252Y (zh) * 1999-02-03 2000-01-12 天津市科技投入公司 具有新齿形型线的双螺杆泵螺杆
CN2771521Y (zh) * 2005-01-14 2006-04-12 陈金海 一种双螺杆泵螺杆的优化型线
CN101082337A (zh) * 2007-07-03 2007-12-05 浙江大学 一种对称形大流量螺杆式空压机的螺杆型线
CN201301806Y (zh) * 2009-05-05 2009-09-02 重庆大学 大流量高压螺杆泵
CN101576079A (zh) * 2009-06-12 2009-11-11 天津泵业机械集团有限公司 双螺杆泵螺杆齿形
CN202301015U (zh) * 2011-10-29 2012-07-04 黄山众拓工业泵制造有限公司 一种密封型齿形型线螺杆

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108869272A (zh) * 2018-08-20 2018-11-23 天津泵业机械集团有限公司 螺杆泵啮合齿型中从动螺杆齿型尖角处倒棱型线结构

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