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Method and device for controlling pump output of concrete pumping machinery

A technology of concrete pumps and control methods, which is applied in the direction of mechanical equipment, pump control, liquid variable capacity machinery, etc., and can solve the problems of no longer adjustment, full use of engine efficiency, engine flameout, etc.

Active Publication Date: 2013-04-24
河北雷萨重型工程机械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first is that the engine speed is constant, and the displacement of the hydraulic pump corresponding to the gear is set by default, that is, each gear corresponds to a certain displacement of the hydraulic pump, and no adjustment is required during work.
The second is the engine speed and hydraulic pump displacement corresponding to the default setting gear, that is, each gear corresponds to a certain engine speed and hydraulic pump displacement, and no adjustment is required during work.
Traditional concrete pumping machinery usually uses a constant power valve for power limitation
Use the constant power valve to limit the power, once the setting is completed, it can no longer be adjusted during work
If the setting value is too large, the constant power will not work, and it will easily cause the engine to stall
If the setting value is too small, the engine load rate is low, and the engine efficiency is not fully utilized, and the fuel consumption is relatively high.

Method used

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  • Method and device for controlling pump output of concrete pumping machinery
  • Method and device for controlling pump output of concrete pumping machinery
  • Method and device for controlling pump output of concrete pumping machinery

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Embodiment Construction

[0012] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0013] In this application, the term "concrete pumping" refers to using a hydraulic pump to output high-pressure hydraulic oil to drive a hydraulic cylinder to reciprocate and transport concrete through pipelines. The term "load rate" mentioned refers to the ratio of the actual output power of the engine to the maximum power at the current speed, or the ratio of the actual output torque of the engine to the external characteristic torque at the current speed. The term "external characteristics" mentioned refers to the maximum torque at the current speed of the engine.

[0014] figure 1 A schematic diagram of a typical concrete pumping machinery power transmiss...

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Abstract

Provided are a method and a device for controlling pump output of concrete pumping machinery. The method includes determining target output of a hydraulic pump (40) under current rotating speed of an engine (10) and adjusting the output of the hydraulic pump (40) to achieve the target output. The step of adjusting the target output of the hydraulic pump (40) includes setting required output of the hydraulic pump (40) under current rotating speed of the engine (10), determining largest limit output of the hydraulic pump (40) under current rotating speed of the engine (10), comparing the required output and the largest limit output of the hydraulic pump (40) of the hydraulic pump (40) and enabling the smaller one of the required output of the hydraulic pump (40) and the largest limit output to serve as the target output of the hydraulic pump (40).

Description

technical field [0001] The invention relates to the field of concrete pumping, in particular to a pump displacement control method and control equipment for concrete pumping machinery. Background technique [0002] At present, the control methods of traditional concrete pumping machinery (for example, concrete pump truck, vehicle-mounted pump, supporting pump, etc.) mainly include the following types. The first is that the engine speed is constant, and the displacement of the hydraulic pump corresponding to the gear is set by default, that is, each gear corresponds to a certain displacement of the hydraulic pump, and no adjustment is required during work. The second is the engine speed and hydraulic pump displacement corresponding to the default setting gear, that is, each gear corresponds to a certain engine speed and hydraulic pump displacement, and no adjustment is required during work. Traditional concrete pumping machinery usually uses a constant power valve for power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/06
Inventor 苗坤林胡智张华王泽堂
Owner 河北雷萨重型工程机械有限责任公司
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