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S. SH single-stage double suction centrifugal pump
S. SH single-stage double suction centrifugal pump
Product details
1、 Overview of S and SH single-stage double suction centrifugal pumps:
S. SH type singleDouble suction centrifugal pumpA centrifugal pump with a casing for pumping clean water or other liquids with physical and chemical properties similar to water. The temperature of the transported liquid shall not exceed 80 ℃. Suitable for factories, mines, urban water supply, power stations, farmland irrigation and drainage, and various water conservancy projects.
IIS. SH type single-stage double suction centrifugal pumpAssembly, disassembly, and installation:
Assembly and disassembly
1. Assemble rotor components: sequentially install the impeller, shaft sleeve, shaft sleeve nut, packing sleeve, packing ring, packing cover, water stop ring, and bearing components on the pump shaft, and then install the double suction sealing ring, and then install the coupling.
2. Install the rotor components onto the pump body and adjust the axial position of the impeller? Fix it in the middle of the double suction sealing rings on both sides, and tighten the bearing body cover with the fixing screws.
3. Install the packing, place the middle opening paper pad, cover the pump cover and tighten the screw tail pin, then tighten the pump cover nut and install the material cover. But do not press the packing too tightly. If the packing is too tight, it will cause the shaft sleeve to heat up and consume a lot of power. Also, do not press it too loosely. If it is too loose, it will cause liquid leakage and reduce the efficiency of the water pump.
After assembly, rotate the pump shaft by hand without any rubbing, and the rotation is relatively light and smooth? Okay, the disassembly can be carried out in the reverse order of the above assembly.
install
1. InspectionSpeed centrifugal pumpThe electric motor should be undamaged.
2. The installation height of the water pump, combined with the hydraulic loss of the suction pipeline and its velocity energy, shall not exceed the allowable suction vacuum height value specified in the sample. The basic dimensions should conform to the installation dimensions of the pump unit.
3. Installation sequence:
① Place the water pump on a concrete foundation with embedded anchor bolts, adjust the level by adjusting the wedge-shaped cushion blocks between them, and tighten the anchor bolts appropriately to prevent movement.
② Pour concrete after the foundation and pump base.
③ After the concrete has dried and solidified, tighten the anchor bolts and recheck? The levelness of the water pump.
④ Correct the concentricity between the motor shaft and the water pump shaft. Align the two axes in a straight line, with a coaxiality tolerance of 0.1mm on the outer circle of the two axes, and a non-uniformity tolerance of 0.3mm along the circumference of the end face gap (after connecting the inlet and outlet water pipelines and conducting trial operation, they should still meet the above requirements).
⑤ Checking? After the electric motor rotates in the same direction as the water pump, install the coupling and connecting column pin.
4. The inlet and outlet water pipelines should be supported by additional brackets and should not be supported by the pump body.
5. The junction surface between the water pump and the pipeline should ensure good air tightness, especially for the inlet pipeline, which must be strictly leak proof, and there should be no possibility of air accumulation on the device.
6. LikeInstalled above the inlet water level, in order to start the pump, a bottom valve can generally be installed. Vacuum water diversion method can also be used.
7. After the water pump and outlet pipeline, it is generally necessary to install gate valves and check valves (not required for heads less than 20 meters), with the check valve installed behind the gate valve. The installation method mentioned above refers to water pump units that do not come with a common base. Install a pump with a common base and adjust the level of the unit using wedge-shaped shims between the base and the concrete foundation. Then pour concrete in between. The installation principles and requirements are the same as those for units without a common base.
IIIS. SH type single-stage double suction centrifugal pumpStart, stop, and run:
1. Start and Stop:
Before starting, rotate the rotor of the pump gently and evenly.
② Close the outlet valve and inject water into the pump (if there is no bottom valve, use a vacuum pump to evacuate and divert water) to ensure that the pump is filled with water No air pockets.
③ If the pump is equipped with a vacuum gauge or pressure gauge To turn off the rotary base connected to the pump and restart the motor Wait for the speed to return to normal before opening; Then gradually open the outlet gate valve. If the flow is too large, the gate valve can be adjusted by closing it appropriately; On the contrary, if the traffic is too low Open the gate valve wide.
④ All right? Tighten the compression nut on the packing gland to allow the liquid to leak out in droplets Also pay attention to the filling chamber? Raise.
⑤ When the water pump stops running First, close the plugs of the vacuum gauge and pressure gauge, as well as the gate valve on the outlet pipeline Then turn off the power to the electric motor in compliance with
When the temperature of the environment is low, the square screw plug at the bottom of the pump body should be opened Remove it?? Water To prevent freezing and cracking When the use is stopped for a long time The water pump should be disassembled to dry the water on the other component Apply anti rust oil on the processed surface and keep it safe.
2. Operation:
① Is the water pump bearing high? The temperature should not exceed 75 ° C.
② What is the amount of calcium based grease used to lubricate bearings, accounting for one-third of the bearing body space? 1/2 is appropriate.
③ Packing wear? The packing gland can be appropriately tightened If there is excessive wear and tear, should it be replaced?.
④ Regular visits?? Axis components Pay attention to the temperature rise of the motor bearings.
⑤ During operation If discovered? When there is noise or other abnormal sounds, the vehicle should be stopped immediately Check? The reason for this Eliminate it.
⑥ Do not arbitrarily increase the speed of the water pump But it can be used to reduce the speed If the rated speed of this type of pump is n, the flow rate is Q, and the head is H The shaft power is N, and the reduced speed is n1. The flow rate after deceleration Head lift The shaft powers are Q1, H1, and N1, respectively. Their interrelationships The following formula can be used for conversion:
Q1=（n1/n）Q H1=(n1/n)²H N1=(n1/n)³N
4S. SH type single-stage double suction centrifugal pumpModel definition:
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