Wheeled crane and hydraulic oil cooling system and control method thereof

Abstract

The invention discloses a wheeled crane and a hydraulic oil cooling system and control method thereof. The disclosed cooling system comprises a radiator, a power part driving the radiator, a detection part, a control part and an execution part, wherein the detection part is used for detecting the temperature of hydraulic oil; the control part receives a temperature signal of the hydraulic oil, compares the temperature with the preset temperature, and generates a control signal according to the comparison information; and the execution part controls the power part to work or stop according to the control signal. By the coordinated operation of the detection part, the control part and the execution part, the radiator can be automatically started or stopped, so as to enable the temperature of the hydraulic oil to be always maintained in the preset temperature range, reduce the possibility of super high temperature, simultaneously prolong the service life of the hydraulic elements of the system and give play to the optimum heat dissipation function of the cooling system. At the same time, the start or stop of the radiator can be automatically controlled, thus the work of operators can be reduced, the dependence of the system safety on the manual operation can be reduced and the safe reliability of the system can be improved.

Description

technical field [0001] The invention relates to the field of engineering machinery heat dissipation, in particular to a hydraulic oil heat dissipation system and heat dissipation control method for wheeled cranes. In addition, the present invention also relates to a wheeled crane comprising the above-mentioned hydraulic oil cooling system. Background technique [0002] The hydraulic oil cooling system is one of the main components of the hydraulic system of the crane. Its function is to cool down the high temperature hydraulic oil, so that the temperature of the hydraulic oil is in the best state, thereby improving the working efficiency of the hydraulic system and ensuring the normal operation of the crane. Work. [0003] The traditional hydraulic oil cooling system is mainly composed of radiators. There are two types of radiator opening, electric control and oil control. The difference is that the motors that provide the driving force are electric motors and oil motors. ...

AI Technical Summary

Problems solved by technology

Although the manual control of the hydraulic oil cooling system can solve the problem of excessive oil temperature within a certain range, it cannot maximize the function of the hydraulic oil cooling system, and the current hydraulic oil cooling system also has many problems:

[0006] 1) The radiator is controlled manually. When the operator forgets to turn on the switch of the cooling system, the temperature of the hydraulic oil will rise with the work of the actuator. When the temperature is too high, it will seriously affect the service life of the hydraulic components of the system. If it is serious, the engine will be turned off directly, so that the crane cannot work normally;

[0007] 2) Due to the manual control of the radiator, the operator can only turn on the radiator by feeling, which cannot achieve the best heat dissipation function of the cooling system;

[0008] 3) The oil return of the existing system needs to go through the radiator, and the radiator will provide a large back pressure to the system, which may make some components not function properly in time and reduce the reliability of the system

For example, the oil return of the hoist brake needs to pass through the hydraulic oil radiator. The existence of the radiator provides a back pressure for the brake. If the back pressure is too large, the brake will not brake completely, which will cause the hoisting system to continue when the hoist stops. slow down phenomenon

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