Information source: Hubei Chengli Group Co., Ltd.
The hydraulic system schematic of the concrete mixer truck produced by Xuzhou Liebherr (LIEBHERR) Concrete Machinery Co., Ltd. The composition and characteristics of the entire system are as follows: variable displacement hydraulic pump, available in left-hand and right-hand rotation; make-up pump, responsible for supplying oil; hydraulic variable displacement motor with high-pressure protection function; hydraulic oil cooler, responsible for cooling the oil tank and suction filter; relief valve, working pressure is 14-15 bar, used to maintain system working pressure and hydraulic cooling filtration; servo valve, available in mechanical and hydraulic versions; planetary gearbox, used to transmit rotational motion; mixing drum, equipped with a constant speed control device and road clearance vehicle.
Liebherr concrete mixer truck's integrated "three-in-one" transmission device functional relationship diagram, which includes the oil collector, cooler, fan, and cable. Transmission components include: drive gear, for P3300, P4300, and P5300 models, it is the HPM51 type planetary drive gearbox, used to drive the mixing drum and prevent twisting; oil level inspection hole with an oil filter cap; valve connected to the drain port, this installation method can prevent oil leakage and protect the environment, when the oil temperature is too high, the fan motor can be connected to start cooling; heat dissipation fins installed at the end of the fan. The entire transmission system has the characteristics of compact structure, high transmission efficiency, safe and reliable operation, and easy maintenance, and is currently a recommended transmission structure for concrete mixer trucks both domestically and internationally, including vacuum pumps for sewage suction trucks.
The hydraulic principle diagram of the Haeno concrete mixer truck. When the control system device makes the swashplate rotate to the right, the oil pump begins to discharge oil from one oil outlet A, through a high-pressure oil pipe into the motor, making the motor rotate. The oil flowing through the motor becomes low-pressure oil, returning to the oil pump via another high-pressure oil pipe from port B. The larger the angle of the swashplate rotation, the more oil the pump discharges per revolution, resulting in a higher motor speed. When the swashplate is manipulated to rotate to the right, pressure oil is discharged from the port, changing the motor's direction of rotation, while low-pressure oil flows back to the pump from port A. This is the principle behind the ability of the mixer truck's mixing drum to achieve stepless speed variation within a certain speed range and have two directions of rotation. The function of the make-up pump is to replenish the oil in the working circuit, with the remaining oil entering the pump housing and returning to the oil tank via the radiator.
Office Address: Suizhou City, Hubei Province
Factory Address: Chengli Auto Industrial Park, Pingyuan Gang, Suizhou City (get off at the terminal station of No. 10 bus from the old train station or bus station)
Company Name: Hubei Chengli Group Co., Ltd.
Contact Telephone: 0722-3229933, 15972787777
Free Hotline: 400-087-8919
Website: www.cljbcw.com, www.hbclqiche.com
Fax: 0722-7096999