Method and device for calibrating displacement current of pumping pump and engineering machinery

Abstract

The invention relates to the field of engineering machinery, and discloses a method and device for calibrating the displacement current of a pumping pump and construction machinery. The method includes determining the initial displacement current of the pumping pump; In the case of the pumping pump and the displacement of the pumping pump being controlled by the initial displacement current, determine the pumping times of the pumping pump in the pumping cycle; determine whether the determined pumping times are in the within the range of preset pumping times; and in the case that the determined pumping times are not within the preset pumping times range, updating the initial displacement current until the determined pumping times are within the preset pumping times Send within the range of times to complete the calibration of the displacement current. In this way, the automatic calibration of the displacement current is realized.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a method and device for calibrating the displacement current of a pumping pump and construction machinery. Background technique [0002] The pumping speed of the pumping equipment depends on the displacement of the pumping pump and the speed of the pumping pump. When the engine speed is constant, the greater the control current for controlling the displacement of the pumping pump, the greater the flow rate of the driving hydraulic oil output by the pumping pump to the pumping cylinder per unit time, that is, the faster the pumping speed. [0003] In the current industry, in order to facilitate the use of customers, the pumping equipment shipped from the factory controls the pumping speed through the "gear" potentiometer (or virtual gear) during operation, so that the pumping displacement and the engine speed are artificially set. The lower gear is matched, so that the purpo...

AI Technical Summary

Problems solved by technology

However, there are the following disadvantages: 1. The pumping frequency comprehensively reflects the two factors of oil pump speed and displacement. Although the speed is limited by matching, the influence of irrelevant factors (oil pump speed) on the calibration of target parameters cannot be ruled out; 2. Pumping is adopted. The method of counting the number of times is used as the basis for calibration verification, which makes the calibration process long

Especially when the original parameter setting cannot make the pumping times meet the requirements, multiple adjustments are required, and multiple calibration verifications are required, which will waste a lot of time and resources; 3. For the low gear corresponding to the "minimum current calibration", the corresponding The engine speed is the minimum speed allowed for pumping; for the high gear corresponding to the "maximum current calibration", the corresponding engine speed is the maximum speed allowed for the operation; the energy consumption ratio of the engine at these two speeds is poor and uneconomical; 4. During the calibration process of the two current parameters, manual gear adjustment is required; 5. For a dual-pump (dual-displacement control) system, the method of counting the number of pumping times cannot effectively adjust the displacement current of each main pump. The calibration verification The most important is the pumping speed of the combined effect of the double pumps; 6. Repeated attempts to adjust the displacement current will lead to the loss of equipment parts; 7. It requires the debugger to concentrate, and the number of times and the time card are highly subjective. Low efficiency; 8. The data counted by the commissioning personnel cannot directly become "data", and additional data entry (import) is required, making it difficult to control the quality of the equipment process

Images