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Hydraulic flowmeter

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1. How to adjust the pressure of the hydraulic pump

1. Start the four buried leather hydraulic pump and adjust the reading difference of the flowmeter to Q2

2. Tighten the screw of the overflow valve until the pressure gauge shows 80bar

3. Loosen the adjusting screw of the flow control valve until the reading of the flowmeter no longer drops

4. Tighten the screw again and adjust the value of the pressure gauge to 260bar

5. Finally, adjust the screw of the controller until the reading of the flowmeter reaches Q1.

2. Hydraulic motor bmr250 flow

The flow range of the BMR250 hydraulic motor is about 50-150 liters per minute (The specific value needs to be combined with the dynamic calculation of speed and pressure. The underlying logic of flow calculation is that the flow rate of a hydraulic motor is not fixed like that of a water pump, and its core law follows the formula Q=V × n (flow rate=displacement × speed). The displacement parameter V of BMR250 is 250cm ³/r, which is equivalent to the theoretical requirement of 250 milliliters of oil to drive the motor for each revolution. 2. The fluctuation range of actual working conditions. In daily use, when the motor is in the rated speed range (about 200-600r/min), the formula can be used to deduce: ▪ Low speed operation (200r/min): 50L/min (250cm ³ × 200 ÷ 1000) ▪ High speed operation (600r/min): 150L/min (250cm ³ × 600 ÷ 1000). In actual systems, factors such as oil compressibility and pipeline pressure drop can cause the actual flow rate to be 5-15% higher than the theoretical value. Although the pressure parameter is not directly reflected in the flow formula, the system pressure can affect the actual speed of the motor. Wh

Hydraulic flowmeter
en the load torque increases, if the relief valve pressure is not adjusted in time, it may cause the speed to decrease and indirectly change the actual flow rate value. This phenomenon is particularly evident at the moment of heavy load startup. The necessary action for data calibration is during the hydraulic system debugging stage. It is recommended to use a turbine flowmeter in series with the inlet pipeline for actual measurement and calibration. The technical manual provided by the equipment manufacturer usually indicates the pressure flow characteristic curve, and such professional information can be obtained directly by calling the motor manufacturer.

3. When the nozzle is blocked, will the flowmeter also record the flow rate?

When the nozzle is blocked, whether the flowmeter records the flow rate depends entirely on the installation position and detection principle of the flowmeter, and there are two typical working conditions.

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Firstly, the flowmeter is installed upstream of the nozzle. At this time, the flowmeter detects the flow rate of the fluid flowing through its own upstream pipeline. If the nozzle is blocked, it will only limit the downstream fluids ability to pass through, but the upstream fluid will still flow through the flowmeter normally. The flowmeter will continue to output the current upstream fluid flow rate value, and only the effective output flow rate at the actual terminal (downstream of the nozzle) will be significantly reduced or even completely zero.

. For example, in industrial spraying systems, when the nozzle of the spray gun is blocked, the upstream installed gear flowmeter will still record the flow rate of the paint pump, but the spray gun cannot discharg

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