Mechanical Seals, freely translated, is a mechanical block maker. However, the translation becomes more difficult to understand and imagine if compared to the technical sense. Why? Because understanding the mechanical seal means so broad. Are all types of mechanical seals can be called with a mechanical seal? An O-ring mechanical seals, as well as Labyrinth Seal, but both are definitely not MechanicalSeal.
For ease of understanding, then this site feel the need to declare the writing is the ideal mechanical seal Mechanical Seal and agreed in advance that the mechanical seal is essentially fall into the category seal. Seal will not be translated yet clarified its understanding through a series of examples.
Terminology
The most difficult for beginners is the understanding of the terms used in reference to the mechanical seal. For that let us equate perception advance over the following matters:
SHAFT is as / the shaft of a tool and a major part of rotating machines. Manual machines often use the word as shafts compared.
SHAFT SLEEVE is a bushing / sleeve-shaped adapter which is mounted on the shaft with the aim of protecting the shaft due to the tightening of the bolt / screw MechanicalSeal.
SEAL is a part / parts in a construction equipment / machinery that serves as a barrier to exit / entry of liquid, either the process fluid or lubricant. On a motorcycle or car repair shops often said rubber seals, seals-as crutches, oil-seal. Another analogy, try to imagine a tank. What would happen if the glass affixed to the glass without any glue / sealant?
Glue the glass after hardened, in these conditions is the seal. Seal can be agreed that refers to the notion of a function. Whatever the shape and material, if functioning to prevent leakage, then he called the Seal.
O-RING originally was referred to the circular rubber which serves as a Seal. The development of technology as a tool o-ring pengeblok secondary fluid (secondary sealing device) produces various types of o-rings based on the material. O-ring material, there are natural rubber, EPDM, Buna, Neoprene, Viton, Chemraz, Kalrez, Isolast to type Encapsulated O-Ring, where the o-ring wrapped with PTFE. Some are purely made from PTFE and is called the Wedge.
SEALFACE is the most important part, the first and most critical of a Mechanical Seal and a point to obstacle MAIN FLUID (primary sealing device) Made of Carbon or Silicone Carbide or Tungsten Carbide or ceramics or Ni-resist, with a series of mixing techniques. Surface material to meet each other (contact) is made so smooth up to the level of smoothness / flatness of the surface reaches 1-2 lightband.
Sealface Often referred to as the contact face. Seal faces means that there are 2 sealface. One silent and pump attached to the wall, and the other spins, attached to the shaft.
Which spins are usually made from softer material / soft. Can be a combination of carbon versus silicone carbide, carbon vs. ceramic, carbon vs. tungten carbide, silicone carbide vs. silicone carbide, silicone carbide vs. tungsten carbide.
After understanding the parts that make up the Mechanical Seal, Mechanical Seals can be followed that is a sealing device which is a combination of fused between sealface attached to the rotating shaft and stationary sealface and attached to the wall static casing / housing pump / tank / vessel / fan.
Sealface that of the rotating shaft is often referred to as the Rotary Face / Primary Ring. While Sealface dwelling or in a stationary condition is often referred to as StationaryFace / Mating Ring / Seat.
Two sealface that can wear out, where one stationary and one rotating, form the primary blocking point (primary sealing).
One or a group of o-ring / bellows / PTFE wedge which is a secondary blocking point (secondary sealing).
Pembeban mechanical tool to make sealface pressed together.
Metal accessories needed to complete the series Mechanical Seals.
How it Works Mechanical Seal
The main point made by two sealfaces blocking surface is very smooth and flat. Friction between the spinning motion of both minimizing the occurrence of leaks. One sealface round shaft rotates to follow, one more silent mounted directly on a wall called Glandplate.
Meterial two sealfaces it is usually different. That one is usually soft, usually carbon-graphite, the other is made of a harder material such as silicone-carbide.
The distinction between the material used in stationary and rotating sealface sealface aalah to prevent adhesion between the two sealfaces. In sealface are usually softer smaller end so often known as wear-nose (the tip that could run out or wear rubbed).
Please see the picture above. The main blocking point (primary sealing) is on contactface, 2 pieces sealfaces meeting point, see Point A, Point B leakage path is blocked by an O-Ring, or V-Ring or Wedge (read: WED). While the leakage path at Point C and Point D, blocked with gaskets or O-Ring.
Point B, C & D is called the secondary sealing.
Great post about Mechanical Seals. Here I found very useful information about this topic. Thanks
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