Lightning protection apparatus for wind generator blade and mounting method thereof

A lightning protection apparatus for a wind generator blade, comprising:

• a lightning arrester, comprising:
• a lightning arresting portion configured to arrest a lightning;
• a connecting portion configured to be connected to a lightning arrester base, wherein the connecting portion is provided with an external thread;
• and
• a positioning portion disposed between the connecting portion and the lightning arresting portion, wherein the positioning portion is constructed so that after the connecting portion is screwed into a threaded hole, the positioning portion is capable of fitting with a recess in the threaded hole in shape;
• and
• wherein the lightning arrester base is configured to be connected to the lightning arrester and lead out a lightning current received by the lightning arrester during lightning arresting, wherein the lightning arrester base comprises:
• an insulation layer disposed on a surface of the lightning arrester base;
• and
• at least one threaded hole formed on a base surface of the lightning arrester base facing the wind generator blade, wherein a length direction of the threaded hole is perpendicular to the base surface, and the threaded hole fits with the external thread, wherein the recess capable of fitting with the positioning portion in shape is provided at an end part of the threaded hole close to the base surface;
• and
• a down lead connecting portion configured to be in crimp connection with a down lead.