SEAL FOR FORMING SINTERED GEARS

Scenario

In metallurgical industry, sintered products forming, not only have to guarantee a perfect seal but they also must respond to ever higher expectations and requests in terms of guaranteed performance The goal is to make possible the production of larger volumes and, consequently, to reduce machine downtime for maintenance of the wear elements.

Challenge

An important customer operating in the metallurgical industry asked for ATP support to cope with the friction reduction problem verified on standard seals, used up to that moment, and with the increase in linear speed due to a boosted production.

Solution

ATP technical-commercial team, in agreement with the customer, analysed the construction drawings and the operating conditions of the application.

Operational data

• MEDIA: METALLIC POWDER
• ROTATING SEAL ON THE ROD
• SEALING DIAMETER: 500 mm
• SPEED OF ROTATION 50 RPM = 1,3 m / s
• PRESSURE: 1 bar

The seal used up to that time, in addition to being sized with a profile for standard seats, was made of a charged PTFE, generally used in hydraulics and in the presence of high pressures.

ATP, relying on innovative materials studied, developed and tested in its PTFE laboratory, has identified in SINTEK 309 the most suitable material for the required solution. Sintek 309, in addition to having excellent dimensional stability and a low coefficient of friction, has good tribological properties in presence of low load and high speeds, especially in dry conditions (that are more severe).

Later ATP technicians studied a specially-made dimension for this standard profile and, thanks to the support of finite element analysis (F.E.M.), they were able to simulate the operating conditions of the seal before proposing the solution to the customer.

Tests immediately showed improvements in rotor torque reduction.

Testimony

The possibility of counting on a research and analysis laboratory for the development and production of new materials, combined with the ability to simulate and test solutions internally make ATP an excellent partner, absolutely reliable