How to choose suitable Gear Pump Accessories to improve system sealing and operational reliability?

In actual industrial applications, gear pumps are widely used to transport various liquid media, especially under high pressure, high viscosity or corrosive conditions. To improve the sealing and operating reliability of the gear pump system, it is crucial to choose the right Gear Pump Accessories. The following analysis is explained from several key aspects:

1. Selection of sealing system
The sealing system is the core link to ensure the sealing of the gear pump. Common sealing accessories include mechanical seals, packing seals and lip seals. The selection should be based on the following factors:

Medium characteristics: For highly corrosive or high viscosity media, it is recommended to use mechanical seals made of corrosion-resistant materials such as PTFE, FKM, and silicon carbide.

Temperature and pressure conditions: Double-end or balanced mechanical seal structures are required for high temperature and high pressure occasions.

Leakage control requirements: For occasions with extremely low leakage requirements, an integrated sealing chamber and drainage system should be used in conjunction.

2. Materials and structures of bearings and sleeves
During the operation of the gear pump, the bearings and sleeves support the rotating parts, and their matching accuracy directly affects the working state of the seals.

Recommended materials: copper alloy, ceramic or hardened steel, with high wear resistance and low expansion rate.

Precision matching: ensure high concentricity between the shaft and the seal to avoid seal failure due to shaft shaking.

Lubrication assistance: some pump types also need to be equipped with a forced lubrication system or self-lubricating materials to reduce accessory wear.

3. Coupling and shock-absorbing accessories
The selection of couplings should ensure that they can effectively absorb the deviation and vibration between the pump shaft and the motor shaft.

Flexible coupling: suitable for installation environments with general alignment accuracy to buffer impact force.

With damping structure: reduce shaft end runout and reduce impact on the sealing system.

4. Auxiliary systems and accessories
In order to improve the overall operating stability and sealing effect, the following accessory configurations can be considered:

Cooling system: used for temperature control of the sealing chamber or pump body to prevent high temperature from damaging the seal.

Back pressure valve and exhaust valve: maintain stable pressure in the sealing area to prevent cavitation and leakage.

Filter: prevent impurities from entering the pump chamber and wearing the sealing surface.

5. Compatibility and standardization
When selecting, priority should be given to accessories with standardized designs (such as those that comply with DIN and ISO standards) to ensure a good match with the pump body and facilitate subsequent maintenance and replacement.

To improve the sealing and operating reliability of the gear pump system, it is necessary to comprehensively consider the properties of the medium, operating conditions, and the matching relationship between accessories. By rationally selecting high-performance seals, wear-resistant support accessories, intelligent couplings, and necessary auxiliary devices, the service life of the equipment can be significantly extended, the failure rate can be reduced, and the overall operating efficiency can be improved.