公开(公告)号：WO01031178A1

公开(公告)日：2001-05-03

申请号：PCT/JP2000/007151

申请日：2000-10-16

IPC: E02F9/08 ,  F01P1/00 ,  F01P3/18 ,  F01P11/10 ,  F02B29/04 ,  F04D29/54 ,  F04D29/58 ,  E02F9/00

CPC classification number: E02F9/0866 ,  F01P11/10 ,  F01P2001/005 ,  F01P2003/182 ,  F01P2003/187 ,  F01P2050/08 ,  F01P2060/02 ,  F01P2060/04 ,  F02B29/0431 ,  F02B29/0456 ,  F02B29/0475 ,  F04D29/545 ,  F04D29/582 ,  Y02T10/146

Abstract: An engine cooling device of construction machinery, comprising a shroud rear part (10b) supported on an engine (8) side and incorporating a cooling fan (11), a shroud front part (10a) supported on a heat exchanger (9) side and leading cooling air (P) into the shroud rear part (10b), and a sealing member (43) sealing them while allowing for the relative displacement therebetween, wherein an inner diameter (Da) of a shroud front part downstream side end part (10a1) is made larger than an outer diameter (Db) of a shroud rear part upstream side end part (10b1) and the shroud front part downstream side end part (10a1) is generally placed at the same position horizontally as the shroud rear part upstream side end part (10b1), whereby an installation space in an engine room (4) can be reduced to allow the engine cooling device to be applied to small construction machinery and also a fan efficiency can be increased.

Abstract translation: 1.一种工程机械的发动机冷却装置，其特征在于，具备：支承在发动机（8）侧并具有冷却风扇（11）的护罩后部（10b），支撑在热交换器（9）侧的护罩前部（10a） 引导冷却空气（P）进入护罩后部（10b），密封构件（43）在允许其间的相对位移的同时密封它们，其中护罩前部下游侧端部（10a1）的内径 ）大于护罩后部上游侧端部（10b1）的外径（Db），并且护罩前部下游侧端部（10a1）大致位于与护罩后部上游侧水平相同的位置 端部（10b1），从而可以减小发动机室（4）中的安装空间，以使发动机冷却装置适用于小型工程机械，并且还可以提高风扇效率。

公开(公告)号：WO1998016727A1

公开(公告)日：1998-04-23

申请号：PCT/JP1997003598

申请日：1997-10-08

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  KAWASAKI, Koji ,  FUNABASHI, Shigehisa ,  KANEKO, Zenji ,  KANAHARA, Masaki ,  TAHARA, Koji

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F01P05/02

CPC classification number: F02B77/13 ,  F01P5/02 ,  F01P11/10 ,  F01P11/12 ,  F01P2001/005 ,  F01P2003/187 ,  F01P2050/08 ,  F01P2060/02 ,  F01P2060/04 ,  F02B29/0431 ,  F02B29/0475 ,  F02B63/06 ,  Y02T10/146

Abstract: An engine cooling apparatus which comprises an intercooler (3) for precooling a combustion air for an engine (1), an oil cooler (4) for cooling a working oil for a hydraulic excavator, a radiator (5) for cooling a cooling water for the engine (1), a cooling fan (17) which is a centrifugal fan, and a suction pipe (19) for directing a cooling air toward a suction side of the cooling fan (17). A bore (D1) at a downstream end (19A) of the suction pipe is smaller than a bore (D2) at a suction side end (18A) of a rotating shroud so that the downstream end (19A) of the suction pipe is disposed to enter inside the suction side end (18A) of the rotating shroud. Accordingly, noises are further reduced and an engine room (2) is made compact.

Abstract translation: 一种发动机冷却装置，包括用于对用于发动机（1）的燃烧空气进行预冷却的中间冷却器（3），用于冷却用于液压挖掘机的工作油的油冷却器（4），用于冷却用于 发动机（1），作为离心风扇的冷却风扇（17）和用于将冷却空气朝向冷却风扇（17）的吸入侧引导的吸入管（19）。 吸入管的下游端（19A）处的孔（D1）小于旋转护罩的吸入侧端部（18A）处的孔（D2），使得吸管的下游端（19A） 进入旋转罩的吸入侧端部18A内。 因此，噪声进一步减小，发动机室（2）变得紧凑。

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。