径向不平衡力的产生：液压力 液体分布规律：从高压腔到低压腔，沿齿轮外的压力逐齿降低p↑，径向不平衡力增大齿轮和轴承受到很大的冲击载荷，产生振动和噪声 改善措施：缩小压油口，以减小压力油作用面积增加泵体内表面与齿顶间隙之间的压力平衡槽将降低体积效率 总之：泵压力愈高，泄漏愈大。
提高齿轮泵压力的方法： 浮动轴套补偿原理：将压力油引入轴套背面，使其靠近齿轮端面，补偿磨损，减少间隙 弹性侧板补偿原理：通过侧板本身的变形，将泵出口压力油引至侧板背面，以补偿端面间隙 外啮合齿轮泵的优点 1.结构简单，制造方便，价格低廉 2.结构紧凑，体积小，重量轻 3.自吸性能好，对油污不敏感 4.工作可靠，便于维护 外啮合齿轮泵的缺点 1.流量脉动大 2.噪声大 3.排量不可调 啮合齿轮泵由小齿轮、内齿环、月牙隔板等组成 工作原理:小齿轮带动内齿环同向异速旋转，左半部分轮齿退出啮合，形成真空吸油。
右半部分轮齿退出啮合，容积减小，压油月牙板同两齿轮将吸压油口隔开 摆线齿形内啮合齿轮泵由内外转子相差一齿组成，有偏心距离 工作原理：吸油—左半部分，轮齿脱开啮合容积↑，压油—右半部分，轮齿进入啮合容积↓ 特点:结构紧凑，尺寸小，重量轻，运转平稳，噪声小流量脉动小。
但齿形复杂，加工困难，价格昂贵 螺杆泵组成 一根主动螺杆——双头、右旋、凸螺杆 两个从动螺杆-双头，左旋，凹螺杆，安装在泵体内，与其他部件形成螺杆泵 螺杆泵工作原理：V密形成，V密变化，吸压油口隔开 V密形成必须满足四个密封条件，才能形成空间八字形密封容积： 1主从动螺杆共扼 2螺杆根数和螺纹头数必须满足一定关系 3泵体最小长度应大于螺杆的导程 4保证最小径向间隙 V密变化：当主动螺杆逆时针方向旋转时：左面吸油，右面压油 吸压油口隔开：满足上述四个密封条件 特点:结构简单，体积小，重量轻，运行稳定、噪音低、使用寿命长、流量均匀、自吸能力强、体积效率高、无油现象；但螺杆齿形复杂，加工难度大，精度难以保证。
90-L-075-HF-1-NN-80-S-4-S1-D-03-GBA-32-32-24 90L075HF1NN80S4S1D03GBA323224 90L075-HF-2-NN-60-P-4-S1-D-03-GBA-42-14-24 90L075HF2NN60P4S1D03GBA421424 90-L-075-HF-2-NN-60-P-4-S1-D-03-GBA-42-14-24 90L075HF2NN60P4S1D03GBA421424 90L075-HF-5-AB-60-L-4-C7-E-03-GBA-29-29-24 90L075HF5AB60L4C7E03GBA292924 90-L-075-HF-5-AB-60-L-4-C7-E-03-GBA-29-29-24 90L075HF5AB60L4C7E03GBA292924 90L075-HF-5-AB-60-P-4-S1-D-03-GBA-42-42-24 90L075HF5AB60P4S1D03GBA424224 90-L-075-HF-5-AB-60-P-4-S1-D-03-GBA-42-42-24 90L075HF5AB60P4S1D03GBA424224 90L075-HF-5-AB-60-R-3-S1-D-03-GBA-35-35-24 90L075HF5AB60R3S1D03GBA353524 90-L-075-HF-5-AB-60-R-3-S1-D-03-GBA-35-35-24 90L075HF5AB60R3S1D03GBA353524 90L075-HF-5-AB-60-S-4-C7-E-03-GBA-30-30-24 90L075HF5AB60S4C7E03GBA303024 90-L-075-HF-5-AB-60-S-4-C7-E-03-GBA-30-30-24 90L075HF5AB60S4C7E03GBA303024 90L075-HF-5-AB-80-P-3-C6-E-03-GBA-42-42-24 90L075HF5AB80P3C6E03GBA424224 90-L-075-HF-5-AB-80-P-3-C6-E-03-GBA-42-42-24 90L075HF5AB80P3C6E03GBA424224 90-L-075-HF-5-AB-80-S-3-S1-D-03-GBA-20-20-24 90L075HF5AB80S3S1D03GBA202024 90L075-HF-5-AB-80-S-4-S1-E-03-GBA-42-42-24 90L075HF5AB80S4S1E03GBA424224 90-L-075-HF-5-AB-80-S-4-S1-E-03-GBA-42-42-24 90L075HF5AB80S4S1E03GBA424224 90L075-HF-5-BB-60-S-3-C6-D-03-GBA-35-35-24 90L075HF5BB60S3C6D03GBA353524 90-L-075-HF-5-BB-60-S-3-C6-D-03-GBA-35-35-24 90L075HF5BB60S3C6D03GBA353524 90L075-HF-5-BB-80-P-4-S1-D-03-GBA-35-35-24 90L075HF5BB80P4S1D03GBA353524 90-L-075-HF-5-BB-80-P-4-S1-D-03-GBA-35-35-24 90L075HF5BB80P4S1D03GBA353524 90L075-HF-5-BB-80-S-3-C7-E-03-GBA-35-35-24 90L075HF5BB80S3C7E03GBA353524 90-L-075-HF-5-BB-80-S-3-C7-E-03-GBA-35-35-24 90L075HF5BB80S3C7E03GBA353524 90L075-HF-5-BC-60-L-4-C7-E-03-GBA-30-30-24 90L075HF5BC60L4C7E03GBA303024 90-L-075-HF-5-BC-60-L-4-C7-E-03-GBA-30-30-24 90L075HF5BC60L4C7E03GBA303024 90L075-HF-5-BC-60-S-4-C7-E-03-GBA-30-30-24 90L075HF5BC60S4C7E03GBA303024 90-L-075-HF-5-BC-60-S-4-C7-E-03-GBA-30-30-24 90L075HF5BC60S4C7E03GBA303024 90L075-HF-5-BC-80-L-3-S1-E-03-GBA-29-29-24 90L075HF5BC80L3S1E03GBA292924 90-L-075-HF-5-BC-80-L-3-S1-E-03-GBA-29-29-24 90L075HF5BC80L3S1E03GBA292924 90L075-HF-5-BC-80-R-4-S1-D-03-GBA-35-35-24 90L075HF5BC80R4S1D03GBA353524 90-L-075-HF-5-BC-80-R-4-S1-D-03-GBA-35-35-24 90L075HF5BC80R4S1D03GBA353524 90L075-HF-5-BC-80-S-3-C7-D-03-GBA-45-45-24 90L075HF5BC80S3C7D03GBA454524 90-L-075-HF-5-BC-80-S-3-C7-D-03-GBA-45-45-24 90L075HF5BC80S3C7D03GBA454524 90L075-HF-5-BC-80-S-3-C7-E-03-GBA-35-35-24 90L075HF5BC80S3C7E03GBA353524 90-L-075-HF-5-BC-80-S-3-C7-E-03-GBA-35-35-24 90L075HF5BC80S3C7E03GBA353524 90L075-HF-5-BC-80-S-3-S1-E-03-GBA-42-42-24 90L075HF5BC80S3S1E03GBA424224 90-L-075-HF-5-BC-80-S-3-S1-E-03-GBA-42-42-24 90L075HF5BC80S3S1E03GBA424224 90L075-HF-5-CD-60-S-3-C7-C-03-GBA-35-35-24 90L075HF5CD60S3C7C03GBA353524 90-L-075-HF-5-CD-60-S-3-C7-C-03-GBA-35-35-24 90L075HF5CD60S3C7C03GBA353524 90L075-HF-5-CD-80-R-3-C7-D-06-GBA-42-42-24 90L075HF5CD80R3C7D06GBA424224 90-L-075-HF-5-CD-80-R-3-C7-D-06-GBA-42-42-24 90L075HF5CD80R3C7D06GBA424224 90L075-HF-5-CD-80-S-3-C7-E-03-GBA-42-42-24 90L075HF5CD80S3C7E03GBA424224 90-L-075-HF-5-CD-80-S-3-C7-E-03-GBA-42-42-24 90L075HF5CD80S3C7E03GBA424224 90L075-HF-5-CD-80-S-4-C7-D-03-GBA-35-35-24 90L075HF5CD80S4C7D03GBA353524 90-L-075-HF-5-CD-80-S-4-C7-D-03-GBA-35-35-24 90L075HF5CD80S4C7D03GBA353524 90L075-HF-5-NN-60-P-4-S1-D-03-GBA-42-14-24 90L075HF5NN60P4S1D03GBA421424 90-L-075-HF-5-NN-60-P-4-S1-D-03-GBA-42-14-24 90L075HF5NN60P4S1D03GBA421424 90L075-HF-5-NN-60-R-3-C7-D-03-GBA-29-29-24 90L075HF5NN60R3C7D03GBA292924 90-L-075-HF-5-NN-60-R-3-C7-D-03-GBA-29-29-24 90L075HF5NN60R3C7D03GBA292924 90L075-HF-5-NN-60-R-4-S1-D-03-GBA-35-35-24 90L075HF5NN60R4S1D03GBA353524 90-L-075-HF-5-NN-60-R-4-S1-D-03-GBA-35-35-24 90L075HF5NN60R4S1D03GBA353524 90L075-HF-5-NN-60-R-4-T2-D-03-GBA-35-35-20 90L075HF5NN60R4T2D03GBA353520 90-L-075-HF-5-NN-60-R-4-T2-D-03-GBA-35-35-20 90L075HF5NN60R4T2D03GBA353520 90L075-HF-5-NN-60-S-4-S1-D-03-GBA-35-35-24 90L075HF5NN60S4S1D03GBA353524 90-L-075-HF-5-NN-60-S-4-S1-D-03-GBA-35-35-24 90L075HF5NN60S4S1D03GBA353524 90L075-HF-5-NN-80-P-3-C6-E-03-GBA-42-42-24 90L075HF5NN80P3C6E03GBA424224 90-L-075-HF-5-NN-80-P-3-C6-E-03-GBA-42-42-24 90L075HF5NN80P3C6E03GBA424224 90L075-HF-5-NN-80-P-3-C7-D-03-GBA-35-35-24 90L075HF5NN80P3C7D03GBA353524 90-L-075-HF-5-NN-80-P-3-C7-D-03-GBA-35-35-24 90L075HF5NN80P3C7D03GBA353524 90L075-HF-5-NN-80-R-3-C7-D-06-GBA-42-42-24 90L075HF5NN80R3C7D06GBA424224 90-L-075-HF-5-NN-80-R-3-C7-D-06-GBA-42-42-24 90L075HF5NN80R3C7D06GBA424224 90L075-HF-5-NN-80-S-3-C6-D-03-GBA-42-42-24 90L075HF5NN80S3C6D03GBA424224 90-L-075-HF-5-NN-80-S-3-C6-D-03-GBA-42-42-24 90L075HF5NN80S3C6D03GBA424224 90L075-HF-5-NN-80-S-3-C7-D-03-GBA-35-35-24 90L075HF5NN80S3C7D03GBA353524 90-L-075-HF-5-NN-80-S-3-C7-D-03-GBA-35-35-24 90L075HF5NN80S3C7D03GBA353524 90L075-HF-5-NN-80-S-3-C7-D-03-GBA-42-42-24 90L075HF5NN80S3C7D03GBA424224 90-L-075-HF-5-NN-80-S-3-C7-D-03-GBA-42-42-24 90L075HF5NN80S3C7D03GBA424224 90L075-HF-5-NN-80-S-4-C6-E-03-GBA-42-42-24 90L075HF5NN80S4C6E03GBA424224 90-L-075-HF-5-NN-80-S-4-C6-E-03-GBA-42-42-24 90L075HF5NN80S4C6E03GBA424224。
