The invention provides a rotor oil pump directly driven by an engine crankshaft, which comprises a pump body, a pump cover, an outer rotor and an inner rotor; the pump body comprises a shaft hole, a mounting surface and a back surface; the mounting surface of the pump body is provided with a rotor cavity and an oil outlet; the bottom of the rotor cavity is provided with a low-pressure cavity and a high-pressure cavity; a valve hole is also arranged on the pump body, and one end of the valve hole is connected with the high-pressure cavity, and the valve hole is connected with the high-pressure cavity. A plunger, spring and blockage are installed successively from the inside to the outside, and an oil outlet is arranged on the hole wall of the valve hole, which is located on the installation surface of the pump body; an oil inlet is arranged on the side of the pump body, and the oil inlet is connected with the low pressure chamber, and the oil outlet is connected with the high pressure chamber; an outer rotor and an inner rotor are installed in the rotor chamber of the pump body, and a number of grooves are arranged on the side wall of the rotor chamber; A pump cover mounting groove is arranged on the surface, and the pump cover is installed in the pump cover mounting groove by screw. This structure can reduce the friction between the outer surface of the external rotor and the side wall of the rotor chamber, thus saving power consumption.
【技术实现步骤摘要】
一种由发动机曲轴直接驱动的转子式机油泵
本专利技术涉及发动机润滑系统,具体来说是一种转子式机油泵。
技术介绍
转子式机油泵通常由泵体、内转子、外转子、转子轴和泵盖等组成。泵体上设有转子腔,内转子和外转子位于转子腔内,内转子固定安装在转子轴上,由曲轴齿轮直接或间接驱动,内转子和外转子中心的偏心距为e,内转子带动外转子一起沿同一方向转动。一般转子式机油泵的内转子有4个或4个以上的凸齿,外转子的凹齿数比内转子的凸子数多一个,这样内、外转子就能进行同向不同步的旋转,转子的外廓形状曲线为次摆线转子齿形齿廓设计得使转子转到任何角度时,内、外转子每个齿的齿形廓线上总能互相成点接触。这样内、外转子间形成多个工作腔,随着转子的转动,多个工作腔的容积是不断变化的。在进油道的一侧空腔,由于转子脱开啮合,容积逐渐增大,产生真空,机油被吸入,转子继续旋转,机油被带到出油道的一侧,这时,转子正好进入啮合,使这一空腔容积减小,油压升高,机油从齿间挤出并经出油道压送出去。这样,随着转子的不断旋转,机油就不断地被吸入和压出。转子式机油泵结构紧凑,外形尺寸小,重量轻,吸油真空度较大,泵油量大,供油均 ...
【技术保护点】
1.一种由发动机曲轴直接驱动的转子式机油泵,包括泵体(1)、泵盖(2)、外转子(3)、内转子(4),其特征在于:所述泵体(1)包括轴孔(11)、安装面和背面,所述泵体(1)的安装面上设有内凹的转子腔和出油口(12),所述转子腔的底部设有互不相通的低压腔(13)和高压腔(14);所述泵体(1)上还设有一个阀孔,所述阀孔的一端与所述高压腔(14)相通,所述阀孔从内向外依次安装有柱塞(5)、弹簧(6)和堵塞(7),所述阀孔的孔壁上设有一个泄油口(15),该泄油口(15)位于所述泵体的安装面;所述泵体(1)的侧面设有进油口(16),所述进油口(16)与低压腔(13)相通,所述出油口 ...
【技术特征摘要】
1.一种由发动机曲轴直接驱动的转子式机油泵,包括泵体(1)、泵盖(2)、外转子(3)、内转子(4),其特征在于:所述泵体(1)包括轴孔(11)、安装面和背面,所述泵体(1)的安装面上设有内凹的转子腔和出油口(12),所述转子腔的底部设有互不相通的低压腔(13)和高压腔(14);所述泵体(1)上还设有一个阀孔,所述阀孔的一端与所述高压腔(14)相通,所述阀孔从内向外依次安装有柱塞(5)、弹簧(6)和堵塞(7),所述阀孔的孔壁上设有一个泄油口(15),该泄油口(15)位于所述泵体的安装面;所述泵体(1)的侧面设有进油口(16),所述进油口(16)与低压腔(13)相通,所述出油口(12)与高压腔(14)相通;所述外转子(3)和内转子(4)安装在泵体(1)的转子腔内,所述转子腔的侧壁上设有若干个凹槽;所述泵体(1)的安装面上设有泵盖安装槽,所述泵盖(2)通过螺钉安装在泵盖安装槽内。2.根据权利要求1所述的由...
【专利技术属性】
技术研发人员:李维顺,许仲秋,刘光明,刘铁飞,佘笑梅,
申请(专利权)人:湖南机油泵股份有限公司,
类型:发明
国别省市:湖南,43
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