tipo de eixo da bomba

Submarine hammer drilling, often referred to as underwater percussion drilling, is an advanced technique utilized primarily in marine construction and resource exploration. This method combines the principles of traditional drilling with hydraulic and pneumatic operations, enabling the effective penetration of hard substrates beneath the sea floor. In this article, we will explore the processes, equipment, advantages, and applications of submarine hammer drilling.


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  • Metal case – The metal case serves as the frame of the oil seal. Its primary function is to give rigidity and strength to the seal. The material is selected depending on the environment where the seal is to be used.
  • These gaskets are typically made from various types of rubber, such as NBR (Nitrile Butadiene Rubber), EPDM (Ethylene Propylene Diene Monomer), Viton, Silicone, or Neoprene, each chosen based on the specific application requirements. The choice of rubber material depends on factors like temperature resistance, chemical compatibility, pressure ratings, and environmental conditions.
  • The metal case is the exterior (or frame) of the oil seal, the principal function of which is to give rigidity and strength to the seal. The material of the case must be selected depending on the environment where the seals are to be used. Often the metal case is covered by the same rubber material used in the sealing element, which also helps seal the exterior of the oil seal in the housing bore. Common case material types are:

  • Installation of the oil seal

  • Figure 3: Sealing function of main lip radial load
    * KOYO is a registered trademark of JTEKT.

    Figure 4 shows the features of a JTEKT oil seal.

  • Oil