Balance the forced circulation pump axial force method

forced circulation water pump axial force balance method have?

1, the symmetrical arrangement of the impeller: forced circulation pump with the impeller series, so it's bigger than axial force, sometimes planning of symmetrical arrangement of the impeller were used to make them produce axial force cancel each other out, and then to calm the intention of the axial force, the double suction impeller is actually special symmetrical arrangement of the impeller.

2, thrust bearing, the axial force is not big, small pump, we often thrust ball bearing is used to balance the axial force, here special remind is, angular contact bearings has direction installation requirements, if installed backwards, not only can't afford to balance the action of axial force, but also lose axis positioning and make the rotor motion, light burning motor, or a major accident, absolutely cannot treat STH lightly.

3, balance hole: this structure is in the impeller HouGaiBan near the wheel of righteousness axisymmetric to open several holes, making HouGaiBan high-pressure liquid to return to the impeller inlet, then the pressure drop in impeller back cover, to balance the action of axial force. This requirement with HouGaiBan impeller sealing ring structure, that is to say the HouGaiBan office without sealing ring structure of the pump is adopted, due to the leakage of pump is high at this moment, head loss is serious.

4, the balancing drum and disc: the balancing drum and disc is used to balance the axial force in the forced circulation pump equipment, behind the stage at the end of the impeller. Also has is installed between the two.

5, double suction impeller: due to the double suction impeller is symmetric structure, so it can balance the axial force.

6, back blade, blade is back on the impeller HouGaiBan is similar to the reinforcement of blade sample, it's like another behind the same impeller pump impeller liquid, making HouGaiBan liquid pressure drop, and then to balance the axial force of the intention, the clearance between the impeller and the pump cover, the greater the balance effect, the smaller the gap, balance effect is better. But planning gap is too small, big pump take value.

the use of forced circulation pump often encounter suddenly leak problem, this is what reason to form?

1, evacuation, cavitation, or longer pressure-out, result in seal damage;

3, back to the big traffic, leading to inhalation tube side at the bottom of the container and elements, damage to the seal;

5, corrosion medium, polymerized, colloidal substances increase;

7, all of a sudden power failure or downtime, forced circulation pump working condition frequently change or adjustment, etc.

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