公开(公告)号：WO1997014874A1

公开(公告)日：1997-04-24

申请号：PCT/JP1996003025

申请日：1996-10-18

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  FUNABASHI, Shigehisa ,  TAKADA, Yoshihiro ,  WATANABE, Masatoshi ,  SHIMODE, Shinichi ,  TANITO, Yoshio ,  TANAKA, Sotaro ,  KANEKO, Zenji ,  HIRAMI, Ichiro ,  TAKISHITA, Toshio ,  MIHARA, Shinichi

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F01P05/02

CPC classification number: E02F9/0866 ,  B60K11/04 ,  B60K11/08 ,  F01P5/02 ,  F01P11/10 ,  F01P2001/005 ,  F04D17/162 ,  F04D29/582 ,  F04D29/664

Abstract: First cooling air (50) enters an engine room (1) from outside through a cooling air inlet (7a), passes through a heat exchanger such as an inter-cooler (6a)/oil cooler (6b)/radiator (6c), is throttled by a suction pipe (8a) and enters a centrifugal fan (4). It is then discharged in an outer peripheral direction of the centrifugal fan (4). Second cooling air enters the engine room (1) from outside the engine room (1) through cooling air inlets (7b, 7b), and cools the engine (5), various electrical components such as an alternator (10) and an oil pan (14) while flowing around them. It is then throttled by a suction pipe (8b), enters the centrifugal fan (4) and is discharged in the outer peripheral direction of the centrifugal fan (4). These two kinds of cooling air (50, 51) are discharged to the outside from an exhaust port (9). Therefore, the degree of sealing of the engine (5) can be improved, the noise can be reduced and reliability of the electrical components (10) can be improved by improving the cooling effect for them.

Abstract translation: 第一冷却空气（50）从外部通过冷却空气入口（7a）进入发动机室（1），通过诸如中间冷却器（6a）/油冷却器（6b）/散热器（6c）的热交换器， 被抽吸管（8a）节流并进入离心式风扇（4）。 然后在离心风扇（4）的外周方向排出。 第二冷却空气通过冷却空气入口（7b，7b）从发动机室（1）的外部进入发动机室（1），并且冷却发动机（5），各种电气部件，例如交流发电机（10）和油盘 （14）。 然后通过吸入管（8b）进行节流，进入离心式风扇（4），并在离心式风扇（4）的外周方向排出。 这两种冷却空气（50,51）从排气口（9）排出到外部。 因此，通过改善发动机（5）的冷却效果，能够提高发动机（5）的密封度，可以降低噪声，提高电气部件（10）的可靠性。