Measures to improve the sealing performance of gear pumps
Improving the sealing performance of gear pumps is one of the key measures to ensure their efficient and stable operation. The following are some specific measures to improve the sealing performance of gear pumps:
1. Select suitable sealing materials
Static sealing materials: Static seals of gear pumps usually use gaskets and sealing rings. When selecting gaskets, their corrosion resistance, high temperature resistance and pressure resistance should be considered. For sealing rings, such as O-rings, materials with good compatibility with the medium, good elasticity and strong wear resistance should be selected.
Dynamic sealing materials: Dynamic seals mainly use mechanical seals. When selecting mechanical seals, their structural type (such as single-sided, double-sided, balanced and unbalanced), materials (such as silicon carbide, tungsten carbide, ceramics, etc.) and the matching accuracy of the sealing surface should be considered.
2. Optimize the sealing structure
Use balanced mechanical seals: For high-pressure media, balanced mechanical seals should be selected to reduce the force on the sealing surface and improve the sealing performance.
Double-end mechanical seals: For high-temperature, easy-to-crystallize, high-viscosity, granular and toxic evaporating media, double-end mechanical seals should be used, and isolation fluid should be injected to prevent the medium from corroding and wearing the sealing surface.
Shaft seal structure: The shaft seal of the gear pump can be a filler seal or a mechanical seal. The filler seal should be made of wear-resistant and corrosion-resistant materials, and the packing compression should be adjusted reasonably. For mechanical shaft seals, attention should be paid to the selection and assembly accuracy of components such as dynamic rings, static rings, rubber seals, O-rings and compression springs.
3. Strengthen the maintenance and care of seals
Regular inspection: Regularly check the seals of the gear pump, including the wear of the sealing surface, the elasticity of the sealing ring, the compression of the packing, etc.
Timely replacement: When the seal is found to be worn, aged or damaged, a new seal should be replaced in time to ensure the sealing performance.
Cleaning and lubrication: Clean the sealing surface regularly to remove impurities and dirt attached to it. At the same time, lubricate the sealing parts that need lubrication to reduce friction and wear.
4. Improve the design of the gear pump
Reduce the gap: By improving the design of the gear pump, reduce the gap between gears and gears, and between gears and pump bodies to reduce leakage.
Optimize gear meshing: Optimize the meshing parameters of the gears, such as the meshing overlap coefficient, to reduce oil entrapment and improve sealing performance.
Balance radial fluid pressure: By adjusting the structure of the gear pump, the radial fluid pressure is balanced to reduce leakage caused by fluid pressure imbalance.
In summary, improving the sealing performance of the gear pump requires selecting suitable sealing materials, optimizing the sealing structure, strengthening the maintenance and care of the seals, and improving the design of the gear pump. The implementation of these measures will help improve the sealing performance of the gear pump, extend its service life, and ensure its efficient and stable operation.
