Control method for oil temperature in hydraulic system
A hydraulic system, oil temperature control technology, applied in the direction of fluid pressure actuating system components, fluid pressure actuating devices, mechanical equipment, etc., can solve problems such as damage to seals and parts, and shorten the life of seals and parts
Inactive Publication Date: 2019-01-11
CHANGSHA AOJIA INFORMATION TECH
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the deficiencies of the prior art, the present invention provides a hydraulic system oil temperature control method, which solves the problem that excessive heating of the hydraulic system proposed in the existing background technology will reduce the life of seals and components, and damage the seals in severe cases and parts problems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0044] Embodiment: a hydraulic system oil temperature control method, comprising the following steps:
[0045] Step 1: When the hydraulic system is working, except for the effective power output by the external load driven by the actuator, the rest of the power loss is converted into heat to increase the oil temperature. The power loss of the hydraulic system is: Phr=Ph1+Ph2+Ph3+Ph4, Ph1 is the power loss of the hydraulic pump; Ph2 is the power loss of the hydraulic actuator; Ph3 is the power loss of the relief valve; Ph4 is the power loss of the oil flowing through the valve or pipeline; the specific calculation steps are as follows:
[0046] 1.1: Calculate the power loss Ph1 of the hydraulic pump, and measure the working time ti of the i-th pump through a stopwatch;
[0047]
[0048] In the formula, Tt——working cycle period (s); z——the number of hydraulic pumps put into work; Pri——input power of hydraulic pumps (W); ηPi——total efficiency of each hydraulic pump; ti——i-th ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a control method for oil temperature in a hydraulic system. The control method comprises the following steps: (1) converting all power loss, except the effective power output by an external load driven by an actuator, into heat when the hydraulic system works so as to increase the oil temperature, enabling the power loss of the hydraulic system to be Phr = Ph1 + Ph2 + Ph3 +Ph4, enabling Ph1 to be the power loss of hydraulic pumps, enabling Ph2 to be the power loss of hydraulic actuators, enabling Ph3 to be the power loss of a relief valve, and enabling Ph4 to be the power loss of the oil flowing through the valve or a pipeline; (2) calculating heat dissipation power of the hydraulic system, enabling the surface of an oil tank to be the main heat dissipation channelof the hydraulic system, and considering the heat dissipation on the surface of the pipeline if the external pipeline of the system is relatively long and if heat generation power is calculated by aformula (5); (3) enabling Phr to be equal to Phc if the system reaches thermal equilibrium, enabling the oil temperature to no longer rise, and obtaining the maximum temperature difference at the time. Through the calculation method, the heat generation power and the heat dissipation power of the hydraulic system can be quickly calculated. Heat generation and heat dissipation can be maintained asequilibrated as possible through reasonable selection and design.
Description
technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a method for controlling the oil temperature of a hydraulic system. Background technique [0002] The function of the hydraulic system is to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely power components, actuators, control components, auxiliary components (accessories) and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. The main function of the hydraulic transmission system is to transmit power and motion. The hydraulic control system must make the output of the hydraulic system meet specific performance requirements (especially dynamic performance). The hydraulic system mentioned here mainly refers to the hydraulic transmission system. Excessive heating of the hydraulic system will reduce the life of the seals and parts, and i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/042
CPCF15B21/042
Inventor 不公告发明人
Owner CHANGSHA AOJIA INFORMATION TECH