Filtering device, generator and wind turbine generator system

A generator, comprising:

• a generator housing with a built-in rotor and a built-in stator, wherein the generator housing has an air inlet for heat dissipation;
• and
• a filtering device provided at the air inlet, wherein the filtering device comprises:
• a load-bearing cover plate;
• an enclosure plate;
• a first filter screen structure;
• a second filter screen structure;
• and
• a filter element;
• wherein the load-bearing cover plate and the enclosure plate define an accommodation space to be filled by the filter element, wherein the enclosure plate forms at least part of a side wall of the accommodation space;
• wherein the first filter screen structure is arranged above the filter element;
• wherein the second filter screen structure is arranged below the filter element, and covers a lower surface of the filter element;
• and
• wherein a mounting port for the filter element to pass through is provided in the load-bearing cover plate.

A wind turbine generator system, comprising:

• a generator housing having an air inlet;
• and
• a filtering device provided at the air inlet, wherein the filtering device comprises:
• a load-bearing cover plate;
• an enclosure plate;
• a first filter screen structure;
• a second filter screen structure;
• and
• a filter element;
• wherein the load-bearing cover plate and the enclosure plate define an accommodation space to be filled by the filter element, wherein the enclosure plate forms at least part of a side wall of the accommodation space;
• wherein the first filter screen structure is arranged above the filter element;
• wherein the second filter screen structure is arranged below the filter element, and covers a lower surface of the filter element;
• and
• wherein a mounting port for the filter element to pass through is provided in the load-bearing cover plate.