Hangzhou WREN Hydraulic Equipment Manufacturing Co.,Ltd
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Fault Locating Method Of Hand Pump

     What are the ways to find faults in manual hydraulic pumps? Manual hydraulic Pump is a kind of hydraulic pump, its function is to the power machine (such as motor and internal combustion engine, etc.) mechanical energy can be converted into liquid pressure energy. The manual pump is the ladder plunger type two-stage hydraulic pump, it as the hydraulic power source, besides and breaks the tool matching, but also may with other many kinds of tools or the experimental device to use. During the use of the process, may be a failure, but we can not find the first time, below we will understand what the manual hydraulic pump to find fault method?Hand Pump
     1. Check the internal leakage of the movable arm cylinder: The simplest way is to raise the boom to see if there is a noticeable drop in freedom. If the whereabouts are obvious, remove the cylinder check and the seal ring should be replaced if it has been found to be worn. 2, check the control valve: first cleaning safety valve, check whether the valve core wear, such as wear should be replaced. If the safety valve is not changed after installation, then check the control valve spool wear condition, its clearance use limit is generally 0.06mm, wear seriously should be replaced. 3, the measurement of hydraulic pump pressure: If the pressure is low, then adjust, add pressure is still not up, then the hydraulic pump serious wear.Hand Pump
     What are the reasons for the manual hydraulic pump to cause the movable arm belt to be unable to ascend? Pump application is very common, in many areas of life have applications, depending on the industry in the selection of different types of pumps have a certain difference. As a simple and convenient hydraulic power source, manual hydraulic pump is widely used in many fields such as shipbuilding industry, coal mine machinery, petrochemical, metallurgy, electric power and heavy machinery. and its small size, light weight, easy to carry, strong security and other advantages are accepted by the vast number of users. So what are the reasons for the manual hydraulic pump to cause the movable arm belt to be unable to ascend?Hand Pump
     1, the hydraulic pump serious wear. In the low-speed operation of the pump leakage is serious; High speed operation, pump pressure slightly increased, but because of the pump wear and leakage, volume efficiency significantly reduced, it is difficult to reach the rated pressure. Long-time hydraulic pump work and increased wear, oil temperature rise, resulting in hydraulic components wear and sealing parts of aging, damage, loss of sealing capacity, hydraulic oil deterioration, and finally lead to failure. 2. The selection of hydraulic components is unreasonable. Dynamic ARM cylinder specifications for 70/40 non-standard series, seals are not standard parts, high manufacturing costs and inconvenience of sealing parts replacement. The cylinder diameter of the movable arm oil cylinder is small, which will make the system adjust the pressure high. 3. The design of hydraulic system is unreasonable. Figure 1 shows that the control valve and the full hydraulic steering gear for the single     Pump series, the relief valve to adjust the pressure of 16MPa, and the hydraulic pump rated work pressure is 16MPa. Hydraulic pump often in full load or long time overload (high pressure), and the system has a hydraulic impact, long-term oil, hydraulic oil pollution, aggravate the hydraulic pump wear, so that the hydraulic pump shell burst (after the failure of this type).Hand Pump

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