(A). The output flow is not enough or not at all ①high suction resistance; such as fuel tank oil is too low. Suction filter plugging. Suction pipe is too long and too many elbows, resulting in oil absorption along the path resistance loss large The output flow is not enough. ② suction pipe exposed to the atmosphere of the pipe joints are not tight or tight, intake difficult to form the necessary vacuum pump, the pressure can not pump into the atmosphere, the pump must be checked before starting the oil temperature and the corresponding Pump stop valve, while the pump to be filled with oil. ③. Motor and pump coupling installation concentricity is not enough, or the coupling and elastomer damage. ④ pump centering spring damage, so that the plunger back is not enough or can not return, causing the cylinder and the loss of sealing between the oil pan performance. ⑤ with a combination of oil pan and cylinder dirt pickup, or combination of surface hair, wash grinding with oil pan and cylinder combination. ⑥ between the plunger and the cylinder wear or tear with a groove. ⑦. For constant pressure variable pump is possible, such as control of the swash plate piston blocking, causing the swash plate angle is too small or no inclination. ⑧. When the assembly and disassembly, with the oil pan hole is not on the pump cover is installed on the positioning pin, and thus withstand each other, can not match with the oil pan and cylinder, resulting in high and low pressure oil short-circuit interoperability, can not hit oil. ⑨. The oil temperature is too high, the pump's internal leakage. ⑩. Other components of the system caused by the failure of a large loss. (B). Pressure is not high or simply not on the pressure ①. "The output flow is not enough or not at all," the reasons will lead to mentioning the pressure is not high or not on the pressure. ②. Variable angle is too small, so that the output flow is too small, may be appropriate to increase the variable angle. ③. For the pressure compensation variable pump, the control variable may be the characteristics of the spring did not adjust the regulator, regulator failure and so on. ④ hydraulic system other components failure. ⑤. The motor's steering is not equal. (C) pump noise large pressure fluctuations ①pump suction pipe into the air, resulting in large fluctuations in noise pressure. ② servo piston and variable piston movement is not flexible, there is occasional or recurrent pressure fluctuations. ③. For variable displacement pump, it may be because the deflection angle of the variable mechanism is too small, the flow rate is too small, the relative increase of internal leakage, therefore, it can not continuously supply oil and flow pulsation and cause pressure pulsation. ④. The plunger ball head and slipper loose with. (D). Pump heat oil temperature rise too high ①. Pump plunger and cylinder hole. With the oil pan and the cylinder surface due to wear and tear, resulting in increased internal leakage, into heat caused by temperature . ②. Serious pump wear paw movement. ③. The viscosity of the oil is too large, the tank volume is too small, excessive pump or system leakage and other reasons. ④. Pump bearing wear or pump and motor coupling concentricity is not enough. (E). Leakage of the pump leak serious ①cylinder block with oil pan. Plunger and cylinder bore and other parts due to severe wear and tear, resulting in increased internal leakage. ② variable piston or servo piston wear and tear lead to leakage. ③ pressure regulator failure.
Overhead Sectional Door
Overhead sectional door most widely used for loading areas on all types of industrial premises and Designed with a curved overhead track, these vertically-opening sectional doors can be installed in areas with reduced head room. They provide heat and sound insulation with its composite panel construction.
The counterbalance and cable system provides quiet and straight forward operation for manual doors. Electric operation is available for larger applications that can incorporate many alternative operator options to suit all client requirements.
The standard outer panels are manufactured from 0.5mm thick, high quality zinc coating to BS EN 10147
For the best weather protection the sectional door panel has an interlocking hinged joint integrating a high quality seal the full length of the panel.
A counterbalance system is incorporated into the sectional overhead door to ensure efficient and effortless operation.
The counterbalance comprises of springs mounted on a steel shaft that are high tensile helical wound steel. It has been heat treated for enhanced performance for around 50,000 cycles.
Reducing shaft friction is achieved with the aid of brackets and guide rollers incorporating highest quality sealed bearings.
Overhead Sectional Door,Overhead Sectional Garage Door,Automatic Overhead Sectional Door, Overhead Insulated Garage Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.selfrepairinghighspeeddoor.com