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QS280T type sweeper hydraulic system design
3 hydraulic system principle
Hydraulic system, main technical parameters: system for l6MPa working pressure, System for work flow 80 L/min.
Hydraulic principle diagram (see figure 2, according to the principle of hydraulic actuators can be divided into the following several circuit conditions.
Traction institutions loop sweeper traction, need to be 6DT electricity, traction cylinder, operation and the car traction. After a while, 7DT 8DT, electricity, traction, finally complete cylinder retract the sweeper car and connected. In the process of edge shovel cylinder retracted.
Edge shovel institution has removed the loop sweeper dirt function. 5DT, 8DT electricity, edge, edge shovel shovel cylinder institution. Now rolling brush, brush brush, right, left by hydraulic cylinder mechanism makes rolling brush, brush, brush, left, right, left the ground for cleaning work.
The loop is sweeping institutions loop of main loop sweeper, including several small loop. Through the throttle pressure oil pressure and flow of 6 July, to compensate by distributing electromagnetic reversing valve 8, 9, and electromagnetic l8 directional control valves.
A. two positive loop 2DT, 4DT and energized electromagnets. 4DT electricity, rolling brush, brush, brush, left, right, hydraulic cylinder by mechanism to ascend, and rolling brush brush, brush motor left right touch the ground and normal cleaning work. The 2DT electricity, pressure oil pressure compensation form at the same time, the flow of corundum 7 two circuits, a loop for rolling brush motor, motor and motor belts, Another loop for right brush brush motor and motor and pump motor left.
Loop flow pressure compensation for my company is by distributing 7 threaded component of development. The effect of load changes, the distribution of the constant flow of the hydraulic oil. Through this valve hydraulic oil can be divided into two parts, and by adjusting the throttle 6, according to the situation of arbitrary distribution proportion, control the speed of actuators.
B. reverse loop when rolling brush, motor, meet jammed as pressure, pressure relay signals to 11 2DT electromagnet, 3DT electricity. The hydraulic oil reversed by electromagnetic reversing valve in order to ascend, motor, rolling brush motor, make both reverse rotation, system, and troubleshooting pressure oil pressure of the valve is still choose to 12 belt motor.
C. belt motor speed adjusting loop electromagnetic valve with the belt speed ratio 10 form parallel loop motor. By changing the speed of flow through valve, adjust the belt speed of the motor.

1. 2, 14 and 16 gear pump pressure relief valve (3), pressure gauges and joint seismic 5, 8, 9 threaded electromagnetic reversing valve 6 throttle pressure compensation and the proportion of electromagnetic flow speed by distributing valve 11.he pressure relay 12 selection pressure relief valve discharge valve in the 17th and 18th, 13, the electromagnetic reversing valves
D. sprayed by electromagnetic loop, 10DT electromagnet directional control valve and pump power, electricity or motor and the right and left brush motor series or parallel.
E. protection circuit relief valve and 16, safety protection function, ensure its corresponding loop overload when unload. Pressure relief valve is developed for 15 of the threaded component, on the one hand, adjust edge shovel out of hydraulic cylinder is needed during stress, on the other hand when the edge shovel, hydraulic cylinder pressure rise suddenly, ensure its corresponding loop overload when unload.

Sweeper QS280T type of hydraulic system design
3 The working principle of hydraulic system
The main technical parameters of the hydraulic system: system pressure l6MPa; system flow of 80 L / min.
Hydraulic schematic diagram shown in Figure 2, hydraulic principle in working condition in accordance with the implementing agencies can be divided into the following loop.
Traction circuit sweeper bodies need to be when traction, 6DT power, traction cylinder out, operation of traction vehicles connected with the main body. After, 7DT, 8DT electricity at the same time, back traction cylinder, and ultimately the completion of clean-up truck and connected to the main car. In this process back side of shovel cylinder.
Loop body edge shovel to eradicate street sweeper with the functions of dirt. 5DT, 8DT electricity cylinder edge shovel out, shovel while working.滚刷at this time to upgrade the left brush, brush the right hydraulic cylinder so that rely on mechanical agencies滚刷, promotion, left brush, brush motor, such as the right to leave the floor, not clean-up.
Cleaning agencies in this circuit is a circuit of the main loop cleaning cars, including several small loop. Pressure oil through the throttle valve 6 and pressure compensation flow distribution valve 7, to reach 8,9 electromagnetic valve and electromagnetic valve l8.
a. Two positive loop electromagnet 2DT, 4DT electricity at the same time. 4DT power, so that滚刷, promotion, left brush, brush right out of hydraulic cylinder, so that by the mechanical agencies滚刷, promotion, brush left and right motor brush contact with the ground, normal clean-up. 2DT power, pressure oil flows through the distribution of the pressure compensation valve 7, while the formation of two loops, one loop for the motor滚刷to enhance the motor, belt, motor; another loop brush for the right motor, left brush motors, motor pumps.
Loop in the pressure compensation flow distribution valve 7 is the development of our company for this thread-style components. The valve from the load changes, the allocation of a constant flow of hydraulic oil. Hydraulic fluid through the valve is divided into two parts, and by adjusting the throttle valve 6, in accordance with the situation of arbitrary distribution of the ratio of the two, controlling the speed of executing agencies.
b. When滚刷reverse loop to enhance the motor, such as encountered stuck blocked, the pressure increased, the pressure signal relay 11 to solenoid 2DT power, 3DT electricity. Reverse hydraulic oil from the electromagnetic valve 9, in order to upgrade the motor, motor滚刷so that both the reverse rotation, system troubleshooting, and the oil pressure valve 12 by the pressure of selection is still being returned to the motor belt.
c. Belt speed adjust motor speed control loop proportional electromagnetic valve 10 in parallel with the formation of belt-loop motor. By changing the flow through the speed control valve, adjusting the belt speed of the motor.

1. 2,14,16 gear pump. Relief valve 3. High-pressure connector 4 manometry. Seismic pressure 5,8,9. Screw-type electromagnetic valve 6. Throttle valve 7. Pressure compensation flow distribution valve 10. Speed ratio of the electromagnetic valve 11. Pressure relay 12. Select the pressure valve 15. 13,17,18,19 vacuum relief valve. Electromagnetic valve
d. Sprinkler loop through the electromagnetic valve 13, solenoid 10DT electricity or power, motors and pumps to achieve the right and left motor brush series or parallel.
e. Protection circuit to protect the safety relief valve from the role of 14,16 to ensure that the corresponding set back when passing to uninstall. Vacuum relief valve 15 is developed by our company for this thread-style components, on the one hand, while adjusting hydraulic cylinder shovel out the pressure required for the second, on the other hand, when the backhoe hydraulic cylinders while involved in an accident, a sudden pressure increased, to ensure that the corresponding set back when passing to uninstall.

The QS280T type cleans the systematic vehicle hydraulic pressure design 3 hydraulic pressure system operating principle hydraulic pressure system main technology parameter: System actuating pressure is l6MPa; System job rate of flow is 80 L／min. The hydraulic pressure principle picture idea pursues 2 , actuating mechanism may be several the following circuits mark in hydraulic pressure principle according to working condition. The traction organization circuit cleans vehicle when necessaries is drug , 6 DT electrify , the traction jar protrudes, operation drags organization and host vehicle is linked together. Afterwards, 7 DT , 8 DT electrify at the same time , the traction jar draws back, accomplish be linked together cleaning vehicle and host vehicle ultimately. In process, the edge shovel jar draws back here. The edge shovel organization circuit cleans vehicle having the function wiping out wayside dirt. 5 DT , 8 DT electrify , the edge shovel jar protrudes, edge shovel organization works. That the jar now rolling a brush , hoisting , assisting the brush , right brush hydraulic pressure depends on machinery organization makes rolling a brush , hoisting , assisting the brush , the right brush motor and so on leave the floor , does not carry out the cleaning job. Cleaning the organization circuit here circuit is to clean the vehicle main body circuit , includes minor several circuits. Pressure oil compensates a rate of flow distribution valve 7 by throttle valve 6 sums pressure , get to electromagnetism changing-over valve 8 , 9 sum electromagnetism changing-over valve l8. A． two forward direction circuit electromagnet 2 DT , 4 DT electrify at the same time. 4 DT electrify , the jar making the brush , right brush hydraulic pressure roll a brush , hoisting , assisting protrudes, depending on machinery organization makes the floor roll a brush , the motor hoisting , assisting the brush , the right brush touches, job carrying out the regular cleaning. 2 DT electrify , pressure paints by that pressure compensates a rate of flow distribution valve 7, form two circuits at the same time, one circuit is to roll the motor brushing a motor , hoisting the motor , the belt; Another circuit is right brush motor , left brush motor , water pump motor. That pressure compensates a rate of flow distribution valve 7 in the circuit is my for this purpose development dyadic company thread component. Owe a valve the effect not accepting loads change , assign constant rate of flow hydraulic pressure oil. Hydraulic pressure oil is two parts course owing a valve mark, and by adjusting a throttle valve 6, the proportion according to scene condition arbitrarily assignment first , second , the speed controlling actuating mechanism's. The b． opposite direction circuit should roll a brush , the lifting motor comes across block up wait to be hindered, when pressure rises, pressure relay 11 effluences signals, make electromagnet 2 DT interruption of power supply , 3 DT electrify. Hydraulic pressure oil opposite direction reason electromagnetism changing-over valve 9, opposite direction revolution , system malfunction remove in proper order to the motor , messenger first , second hoisting the motor , the rolling brush, but pressure oil 12 is still forward by that pressure chooses a valve return to the belt motor. 10 forms the circuit electromagnetism proportion speed regulation valve the c． belt motor rotation rate is adjusted with belt motor connecting in parallel circuit. By changing the rate of flow by speed regulation valve, speed adjusting the belt motor's. 4 is able to bear 1 gear wheel pump 2 , 14 , 16 flooding valve 3 high-handed manometry connection shaking dyadic piezometer 5 , 8 , 9 thread electromagnetism changing-over valve 6 throttle valves 7 pressure make up for rate of flow distribution valve 10 electromagnetism proportion speed regulation valve 11 pressure relays 12 pressure choice valve 15 pressure reduction flooding valve 13 , 17 , 18 , 19 electromagnetism changing-over valve d． sprinkles a circuit passing electromagnetism changing-over valve 13, electromagnet 10 DT circular telegrams or interruption of power supply, Cascade or parallel connection realizing the water pump motor and left , brushing a motor to right. E． protects circuit flooding valve 14 , 16 safeguard effect , load-off when ensuring that whose corresponding circuit is overburdened. Flooding valve relaxing the pressure 15 is my for this purpose development dyadic company thread component, required repeated pressure adjusting edge on one hand when the shovel hydraulic pressure jar protrudes, think that the edge shovel hydraulic pressure jar comes across accident, when pressure rises abruptly on the other hand , load-off when ensuring that whose corresponding circuit is overburdened.

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