CN-114701352-B - Engine heat dissipation system and method and engineering machinery

CN114701352BCN 114701352 BCN114701352 BCN 114701352BCN-114701352-B

Abstract

The invention discloses an engine heat dissipation system, an engine heat dissipation method and engineering machinery, and solves the technical problems that when a water-cooling radiator and an inter-cooling radiator of a high-power engine share one set of cooling fan, the cooling power of the radiator is difficult to match, and the temperature of a power cabin is high so as to influence the performance and service life of an engine ECM. The invention relates to an engine heat dissipation system, wherein an engine is placed in a power cabin, an engine water radiator and an air inlet intercooler radiator are arranged in an up-down structure, the intercooler radiator is placed in the power cabin, the water radiator is placed outside the power cabin, a water radiator wind scooper is designed in a structure with an inclined angle, hot air is discharged upwards, hot air backflow is avoided, and the temperature of the power cabin is effectively reduced. The two radiators adopt hydraulic motors to drive the cooling fans to conduct independent heat dissipation, stepless speed regulation of the fans is achieved through adjusting the flow of the cooling motors, and reasonable control of the water temperature, the air inlet temperature and the cabin temperature of an engine system is achieved.

Inventors

WU QINGLI
QU LIHONG
WANG YONG
YANG YUFENG
ZHANG ZHIYANG
JIAO QING
DOU SHENGPING
WANG CHUNLEI

Assignees

徐州徐工矿业机械有限公司
徐州徐工矿业机械有限公司

Dates

Publication Date: 20260421
Application Date: 20220425
Priority Date: 20220425

Claims (4)

1. An engine heat dissipation system, comprising: A power cabin (1); The engine (2) is arranged on the inner base of the power cabin (1); The engine intercooler (3) is arranged on the base of the inner end part of the power cabin (1), a water outlet pipe (2 a) of the engine intercooler (3) is connected with a water suction port of an engine water pump, and a water inlet pipe (2 b) is connected with a water outlet of the engine intercooler; The engine water radiator (4) is arranged on an upper cross beam at the top of the power cabin (1) and is arranged up and down with the engine intercooler radiator (3), a water outlet pipe (1 a) of the engine water radiator (4) is connected with a water suction port of an engine water pump, and water inlet pipes (1 b and 1 c) are connected with a water outlet of the engine water-cooling thermostat; The expansion water tank (5) is arranged at the upper part of the engine water radiator (4), a first expansion water pipe (3 a) and a second expansion water pipe (3 b) of the engine expansion water tank (5) are connected with water inlet pipes (1 c and 1 b) of the engine water radiator (4), and a third expansion water pipe (3 c) of the engine expansion water tank (5) is connected with a water inlet pipe (2 b) of the engine intercooler radiator (3); The engine intercooler (3) includes: A heat sink core assembly (301); the air guide cover (304) is connected to the heat dissipation core assembly (301); a radiator fan (303) mounted on the air guide cover (304); The engine intercooler (3) is respectively arranged on a base and an upright post in the power cabin (1) through a lower shock absorber (306) which is longitudinally arranged and an upper shock absorber (305) which is transversely arranged; The engine water radiator (4) includes: A heat sink core assembly (401); A wind scooper (403) connected to the heat dissipation core assembly (401); a radiator fan (405) mounted on the air guide cover (403); the engine water radiator (4) is arranged on a top cross beam of the power cabin (1) through the shock absorber (402), a baffle is arranged at the top of the power cabin (1), and the air guide cover (403) is completely isolated from the inside of the power cabin (1); The air guide cover (403) adopts a structure with an inclined angle, the section is wedge-shaped and is inclined upwards, the air channel center of the air guide cover (403) and the normal direction of the heat dissipation core assembly (401) are provided with an upward inclined angle of more than 20 degrees, so that the discharged hot air is discharged upwards, and the hot air backflow of the radiator is avoided; the engine intercooler (3) further includes: the heat dissipation motor (302) is connected with the heat dissipation fan (303) through a spline shaft and then is arranged on the air guide cover (304), and the heat dissipation function is realized by changing the flow of the motor and dynamically adjusting the rotating speed of the fan; The heat dissipation core assembly (301) faces to the outer side of the power cabin (1), the heat dissipation fan (303) and the air guide cover (304) face to the engine (2) in the power cabin (1), and the air channel center of the air guide cover (304) is perpendicular to the heat dissipation core surface and parallel to the air exhaust direction; the engine water radiator (4) further comprises: the heat dissipation motor (404) is connected with the heat dissipation fan (405) through a spline shaft and then is arranged on the air guide cover (403), and the heat dissipation function is realized by changing the flow of the motor and dynamically adjusting the rotating speed of the fan.
2. An engine cooling system according to claim 1, wherein: The engine intercooler (3) and the engine water radiator (4) are both in an induced draft cooling mode.
3. An engine heat dissipation method based on the engine heat dissipation system according to claim 1 or 2, characterized in that: The engine (2) is arranged in the power cabin (1), and the engine intercooler (3) and the engine water radiator (4) are arranged in an up-down structure; An engine intercooler (3) for a low-temperature circulating waterway is arranged in the power cabin (1), the center of an air duct of the air guide cover is vertical to the surface of the radiating core body and is parallel to the exhaust direction; The engine water radiator (4) for the high-temperature circulating water channel is arranged outside the power cabin (1), the air guide cover is designed with an inclined angle, and the center of the air guide cover air channel and the normal direction of the radiating core body are provided with an upward inclined angle of more than 20 degrees, so that the discharged hot air is discharged upwards; The engine intercooling radiator (3) and the engine water radiator (4) adopt a heat dissipation motor to drive a heat dissipation fan to conduct independent heat dissipation, stepless speed regulation of the fan is achieved by adjusting the flow of the heat dissipation motor, and reasonable control of the water temperature, the air inlet temperature and the cabin temperature of an engine system is achieved.
4. An engineering machine, characterized in that: An engine heat dissipation system as set forth in claim 1 or 2 is installed.

Description

Engine heat dissipation system and method and engineering machinery Technical Field The invention belongs to the field of engineering machinery, and particularly relates to an engine heat dissipation system. Background The engine for engineering machinery, especially large engineering machinery, has high power, high load factor and great heat productivity, so that the control of the working temperature of the engine is especially important. The high-power engine cooling system is provided with two loops, namely a high-temperature cooling loop (HTC) such as a cylinder sleeve and the like and a low-temperature cooling Loop (LTC) of an engine air inlet system, and because the two loops have different temperature requirements, the balanced water temperature of the high-temperature loop can reach more than 95 ℃, the balanced water temperature requirement of the low-temperature cooling loop is less than 60 ℃, and the water temperature requirements of the two cooling loops are simultaneously met by adopting two sets of independent heat radiators for heat exchange of an engine water radiator and an intercooler. The existing engine cooling system is generally arranged in a front-back series structure, and is placed in a power cabin as a whole to share a cooling fan. The system has the advantages that the radiator saves space, the power cabin is compact in arrangement, the cost can be saved by sharing one set of cooling fans, but the following obvious defects also exist: 1. The engine water-cooling and intercooler water temperature working temperature ranges are different in requirements and share one set of cooling fan, and independent cooling control cannot be carried out on the two radiators, so that the cooling power matching and design selection difficulty of the radiators are high, and the adaptation to the working environment temperature range is poor. 2. Because the power cabin is a relatively sealed environment, the cooling fan is required to suck cold air outside the power cabin into the cabin through the radiator and then discharge the cold air through the air duct in the cabin, so that the heat in the cabin is brought out to reduce the temperature in the cabin. Because of the high engine water dispersion temperature, the temperature of the power cabin is difficult to be reduced to an ideal temperature range, and the working reliability and service life of the engine ECM are seriously affected. In order to solve the problems of water dispersion and intercooler power matching, design and shape selection of a high-power engine and effectively reduce the temperature of a power cabin in the working process, an engine cooling system needs to be specially designed so as to ensure that the engine is in an ideal working state. Disclosure of Invention According to the defects of the prior art, the invention aims to provide an engine cooling system, solve the problems of cooling power distribution and design and shape selection of a radiator, reduce the temperature in a power cabin, enable the engine to be in an ideal working state, and improve the performance and service life of the power system. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the invention discloses an engine cooling system which comprises a power cabin, an engine intercooler radiator, an engine water radiator and an expansion water tank, wherein the engine is arranged on a base in the power cabin, the engine intercooler radiator is arranged on a base at the end part in the power cabin, a water outlet pipe of the engine intercooler radiator is connected with a water suction port of an engine water pump, a water inlet pipe is connected with a water outlet of an engine intercooler thermostat, the engine water radiator is arranged on an upper cross beam at the top of the power cabin and is arranged up and down with the engine intercooler radiator, a water outlet pipe of the engine water radiator is connected with the water suction port of the engine water pump, the water inlet pipe is connected with a water outlet of the engine water thermostat, the expansion water tank is arranged at the upper part of the engine water radiator, an expansion water pipe of the engine expansion water tank is connected with the water inlet pipe, and the expansion water pipe is connected with the water inlet pipe. According to a further scheme, the engine intercooler and the engine water radiator are both in an induced draft cooling mode. The engine intercooler comprises a heat dissipation core assembly, a wind scooper, a heat dissipation fan, an upper shock absorber and a lower shock absorber, wherein the wind scooper is connected to the heat dissipation core assembly, the heat dissipation fan is arranged on the wind scooper, and the engine intercooler is respectively arranged on a base and an upright post in a power cabin through the lower shock absorber which is longitudinally arranged and the upper shock absorber wh