Totally-enclosed horizontal rotating electric machine

1. A totally-enclosed horizontal rotating electric machine in which a rotor horizontally arranged and a stator arranged at an outer circumference side of the rotor are hermetically sealed in a main frame, and the rotor and the stator are cooled by circulating refrigerant gas, which is encapsulated in the main frame, through a refrigerant passageway, and water-cooled heat exchangers for cooling the refrigerant gas are provided on the way of the refrigerant passageway; wherein

the heat exchangers are respectively arranged in a longitudinal direction at each of positions neighboring both left-right end portions at a front side and both left-right end portions at a rear side of the main frame, in a state where the main frame is viewed from a side-surface direction orthogonal to an axis line of the rotor, and a feed-water inlet and a drain outlet of cooling water are provided at an upper side of the heat exchangers.

2. A totally-enclosed horizontal rotating electric machine as recited in claim 1 , wherein main portions of the heat exchangers are surrounded by heat-exchanger covers, and the feed-water inlet and the drain outlet of cooling water for the heat exchangers are provided at upper sides, which are not surrounded by heat-exchanger covers, of the heat exchangers.

3. A totally-enclosed horizontal rotating electric machine as recited in claim 1 , wherein feed-water pipes connected to the feed-water inlet and drain pipes connected to the drain outlet of the heat exchangers are distributed from the feed-water inlet and the drain outlet to a portion neighboring a lower portion at the front side or rear side of the main frame, and contact portions for a cooling-water-distribution pipe from a cooling-water supplier disposed at an outside area of the rotating electric machine are assembled at the front side or the rear side of the main frame.

4. A totally-enclosed horizontal rotating electric machine as recited in claim 2 , wherein feed-water pipes connected to the feed-water inlet and drain pipes connected to the drain outlet of the heat exchangers are distributed from the feed-water inlet and the drain outlet to a portion neighboring a lower portion at the front side or rear side of the main frame, and contact portions for a cooling-water-distribution pipe from a cooling-water supplier disposed at an outside area of the rotating electric machine are assembled at the front side or the rear side of the main frame.

5. A totally-enclosed horizontal rotating electric machine as recited in claim 1 , wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

6. A totally-enclosed horizontal rotating electric machine as recited in claim 2 , wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

7. A totally-enclosed horizontal rotating electric machine as recited in claim 3 , wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.

8. A totally-enclosed horizontal rotating electric machine as recited in claim 4 , wherein the heat exchangers and heat-exchanger covers, which surround main portions of the heat exchangers so as to form a portion of the refrigerant passageway and protect the heat exchangers, are detachably attached to the main frame.