1. 改进原因:当压缩空气压力大于0.75mpa时，油水分离器组合阀2自动放空，使3号油箱压力保持在0.75mpa以内。压力开关4用于检测3个储气罐内的压力。当压力达到0.75mpa时，压力开关4发出电信号，使低压报警蜂鸣器停止，说明驾驶员可以驾驶。
1. reasons for improvement: when the compressed air pressure is greater than 0.75 mpa, the oil-water separator combination valve 2 automatically empties, so that the pressure of no. 3 tank is kept within 0.75 mpa. pressure switch 4 is used to detect the pressure in three gas storage tanks. when the pressure reaches 0.75 mpa, the pressure switch 4 sends out an electric signal to stop the low-voltage alarm buzzer, indicating that the driver can drive.
传统12 t叉车制动系统主要由空气压缩机、油水分离器组合阀1 2,丙烷坦克、压力开关、空气制动阀4 5,6,7气泵,刹车灯开关左,右钳盘式制动器卡钳盘式制动器9和10储罐,1空气压缩机动力从发动机,发动机运行,1旋转驱动空气压缩机、空气压缩机1输出的压缩空气。压缩空气通过油水分离器组合阀2后进入储气罐3。
traditional 12 t forklift brake system is mainly composed of air compressor, oil-water separator combination valve 12, propane tank, pressure switch, air brake valve 45, 6, 7 air pump, brake lamp switch left, right caliper disc brake 9 and 10 storage tanks, 1 air compressor power from engine, engine operation, 1 rotary drive air compressor, air compressor 1 output compressor. the compressed air passes through the oil-water separator combination valve 2 and enters the gas storage tank 3.
该系统主要存在以下两个缺陷:一是制动系统中只有一个空气增压泵。如果泵在运行过程中突然损坏，会导致整车无法刹车，存在一定的风险。第二，单个空气增压泵的制动液容量相对较小。当叉车长时间工作时，制动液会迅速升温，甚至制动液也会沸腾并溢出10个储液罐。当制动液减少时，制动性能下降，影响叉车的安全。
the system has two main defects: one is that there is only one air booster pump in the brake system. if the pump is suddenly damaged during operation, it will cause the whole brake to be unable to brake, and there is a certain risk. secondly, the brake fluid capacity of a single air booster pump is relatively small. when the forklift truck works for a long time, the brake fluid will rise rapidly, and even the brake fluid will boil and overflow 10 tanks. when the brake fluid decreases, the braking performance decreases, which affects the safety of forklift trucks.
当驾驶员下气制动阀5时，压缩空气从气制动阀5的出风口进入气泵气缸7，将气缸活塞向右推，驱动液压缸内的制动液输出。制动液通过管路分别供给左侧+盘式制动器8和右侧+盘式制动器9，产生制动效果。空气增压泵气缸活塞面积远大于液压缸活塞面积，其产生的增压效果可使制动液压力增加到13mpa。储液罐10用于补充空气增压泵7液压缸的制动液。
when the driver lowers the pneumatic brake valve 5, the compressed air enters the pneumatic pump cylinder 7 from the outlet of the pneumatic brake valve 5 and pushes the cylinder piston to the right to drive the brake fluid output in the hydraulic cylinder. the brake fluid is supplied to the left side+disc brake 8 and the right side+disc brake 9 respectively through the pipeline to produce braking effect. the piston area of air booster pump cylinder is much larger than that of hydraulic cylinder. the boosting effect can increase the braking hydraulic pressure to 13 mpa. the liquid storage tank 10 is used to supplement the brake fluid of the 7 hydraulic cylinder of the air booster pump.
2. 改进措施改进措施是在每个制动系统中增加一个空气增压泵和一个储罐。改进后,制动系统共有两个空气加力燃烧室泵和两个液体储罐,即液体空气加力燃烧室出口管道泵7和10和液体储罐11和12 2空气加力燃烧室水泵7和10正交磁场与左闸8和右闸9分别作用于两个制动缸分别左和右钳盘式制动器。即使一台空气增压泵损坏，制动系统仍能发挥制动作用，从而提高叉车制动的安全性。
2. the improvement measure is to add an air booster pump and a storage tank in each braking system. after improvement, there are two air afterburner pumps and two liquid storage tanks in the brake system, namely, the outlet pipeline pumps 7 and 10 of the liquid air afterburner and the water pumps 7 and 10 of the 11 and 12 air afterburner and the orthogonal magnetic field of the left brake 8 and the right brake 9 acting on the left brake cylinder and the right brake disc brake respectively. even if an air booster pump is damaged, the braking system can still play a braking role, thus improving the safety of forklift braking.
11、12储液罐安装在驾驶室内，通过长胶管与空气增压泵7、10相连接，便于驾驶员观察储液罐内的液位。但是，增加储液罐可以增加制动液的容量，降低制动液温升过快。为了缩短制动管路的长度，使制动更加灵敏，在叉车主梁上安装了空气增压泵7和10。
the 11 and 12 liquid storage tanks are installed in the cab and connected with the air booster pumps 7 and 10 through long rubber hoses. it is convenient for the driver to observe the liquid level in the liquid storage tanks. however,