Sealing ring is a rubber ring with rounded cross
section, which is also called O-shaped sealing ring due to its O-shaped cross
section. It is most widely used in hydraulic and pneumatic transmission systems.
It is mainly used to prevent leakage of liquid
and gas medium from mechanical components in static conditions. In some cases the sealing
rings can also be used as dynamic sealing components for the axial reciprocating movement and low-speed rotation. Different
materials can be respectively selected based on different conditions.
Inner and outer diameters of sealing ring,
thicknesses and concentricities in different positions
1. Due to the strict requirements for precision
for sealing rings, universal tool microscope and projector cannot meet such
2. Its outline is in arc or circular shape, and
ordinary bottom light observation will easily cause shadow and it is difficult
to identify its outline
3. Due to its soft material, elasticity and
being easy to deform, it is not easy to be applied to contact measurement
TZTEK VMQ image measuring instrument can reach
up to 5μm in terms of measurement precision, and be equipped with lenticular
profile light. It applies parallel light as bottom light vertically irradiating
to edges, and this can eliminate outline shadow and improve edge definition.
TZTEK Vispec software can be used to measure
roundness, concentricity, diameter, interval and other conventional items, all
dimensions of sealing ring can be obtained by pressing one button on the
premise of well programmed procedure, which can greatly improve measurement
The function of equant circle specially
developed for sealing rings by TZTEK can obtain thickness values of different
positions by press one button after extracting work piece images, thus enabling
surveyors to determine whether the work piece is OK in shorter time.