1、产品简介Product introduction

1.1用途Application

适用于输送不含固体颗粒和纤维，无腐蚀性，温度不高于120℃，粘度为5×10-6～1.5×10-3m2/s (5～1500cSt)的润滑油或性质类似润滑油的其它液体，以及用于液压传动系统。

It applies to delivering non-corrosive lubricating-oil or equivalent liquid without solid particles and fibres at temperature below 120℃ and with the viscosity of 5×10-6～1.5×10-3m2/s (5～1500cSt).It applies to hydraulic system,too.

1.2应用范围 Application scope
1.2.1在输油系统中可用作传输、增压泵；

1.2.2在燃油系统中可用作输送、加压、喷射的燃油泵；
1.2.3在液压传动系统中可用作提供液压动力的液压泵；
1.2.4在一切工业领域中，均可作润滑油泵用。

It can give performance as transfer pump or booster pump in oil delivery system,and fuel pump for delivery,pressurization and injection in fuel supply system.It can be also applied as hydraulic pump supplying hydraulic power in hydraulic system and in all industry fields as lubricating pump.

1.3结构特点Structure Features
　  本系列齿轮泵主要有齿轮、轴、泵体、安全阀、轴端密封（特殊要求，可选用磁力驱动，零泄露结构）所组成。齿轮经热处理有较高的硬度和强度，与轴一同安装在可更换的轴套内运转。泵内全部零件的润滑均在泵工作时利用输出介质而自动达到。

KCB series gear pumps are mainly composed of gears,axles pump body,pump,cap safety valve and axle-end seals etc.The heattreated gears have the advantage of higher hardness and intensity,and rotate with the axles inside the replaceable bearing sleeves.All of pump's parts can be lubricated by delivered medium when working.
　  泵内有设计合理的泄油和回油槽，是齿轮在工作中承受的扭矩力最小，因此轴承负荷小，磨损小，泵效率高。

The pump is properly designed with leakage and return chute,which lets the gears bear the least torque force and reduces load and wear on bearings bear the least torque force and reduces load and wear on bearings in order to raise pump's efficiency.
　　泵设有安全阀作为超载保护，安全阀的全回流压力为泵额定排除压力的1.5倍，也可在允许排出压力范围内根据实际需要另外调整。但注意本安全阀不能作减压阀的长期工作，需要时可在管路上另行安装。
　　It is also designed with safty valve for protection against overload.The full return flow pressure of the safety valve is 1.5times higher than the rated exhaust pressure of the pump.It can be also adjusted within the allowance of exhaust pressure range according to circumstances .But please note the safty valve can't be applied as pressure-reducing valve for long time .You may install pressure-reducing valve separately on pipe-line if needed.

1.4 型号说明Model description

1.5工作原理Working principle

一对相啮合的圆弧齿轮安装于壳体内部，齿轮两端面靠前后盖密封。齿轮把壳体内部分成左右两个互不相通的A腔和B腔，在壳体上开有有两孔分别和A腔、B腔相通。当齿轮按图示方向旋转时，在A腔，由于一对牙齿脱开，使该腔容积逐渐增大，形成局部真空，油箱中的油液在外界大气压力的作用下，经油管，壳体进入A腔，该腔为吸油腔。吸入到A腔齿间的油液在密封的工作空间中，随齿轮转动，沿壳内壁带入到B腔。在B腔

填满油液的齿间，由于齿轮啮合，使该腔的容积逐渐减小，把齿间的油液挤出去，此腔就是压油腔。当齿轮不断地旋转，则A、B两腔不断地吸油和排油，这就是齿轮油泵的工作原理。

A pair of gears that are engaged are installed inside the casing with two ends sealed by the front and back covers . Gears pide the inside of the casing into cavity A and cavity B which are not interliking . When gears revolves as Fig. I indicates. Cavity A’s volume is enlarged gradually

Because of the disconnection of the teeth，resulting in part vacuum，and oil in the tank flows through oil tubes into cavity A under the externat atmos- phere pressure. So cavity A is called as absorption cavity. The absorbed oil in the cavity A flows into cavity B in sealed space along the inside wall of casing when gears revolve. Oil between gear teeth are extruded out when they are engaged and therefore the volume of this cavity reduce. This is called as press oil cavity. When gears revolve constantly cavities A and B always pump in and exhaust oil, which is the working principle of the gear pump.