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Control method for achieving starting and stopping of oil pump motor through opening and closing of grab bucket

A technology of oil pump motor and control method, which is applied in the direction of mechanical equipment, servo meter circuit, load suspension components, etc., can solve problems such as internal leakage of the system, increase of hydraulic oil temperature, and damage to seals, so as to prolong the service life and save energy. Electric energy, the effect of controlling hydraulic oil temperature

Inactive Publication Date: 2018-12-07
CHENGDU XINGRONG RENEWABLE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cause hydraulic oil temperature to rise gradually
It is well known that the increase in hydraulic oil temperature will weaken the sealing effect of the hydraulic system or even damage the seals, resulting in internal leakage in the system.

Method used

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  • Control method for achieving starting and stopping of oil pump motor through opening and closing of grab bucket
  • Control method for achieving starting and stopping of oil pump motor through opening and closing of grab bucket

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Experimental program
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Embodiment Construction

[0010] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0011] Such as figure 1 As shown, after operating the key switch on the console, the KM contactor coil is energized, the KM main contact is closed, and the hydraulic oil pump motor starts to work; when the grab is operated on the console to grab materials, the solenoid valve coil YV2 is energized , The hydraulic system drives the clap to complete the closing action; after the bridge crane cart and trolley move to the material stacking position, operate the grab on the console to release the material, the solenoid valve coil YV1 is energized, and the hydraulic system drives the clap to open. Action, the material release is completed. During this process, the hydraulic oil pump motor has been in working condition, and the hydraulic oil overflows back into th...

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PUM

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Abstract

The invention discloses a control method for achieving starting and stopping of an oil pump motor through opening and closing of a grab bucket. The positions of coils of three-position four-way solenoid valve sets for hydraulic system control are connected with time-delay relays in parallel, and outage time-delay contacts of the time-delay relays are connected into a starting-stopping loop of theoil pump motor in series. The starting and stopping of an oil pump are controlled through the opening and closing of the grab bucket. According to the control method, due to the fact that the time-delay relays are additionally arranged, the starting and stopping of the oil pump motor and the opening and closing of the grab bucket are interlocked, and the working time of the oil pump is shortened;and electric energy is saved, the hydraulic oil temperature is controlled, hydraulic system seal is protected, and the service life of hydraulic components is prolonged.

Description

Technical field [0001] The invention relates to a grab-type universal bridge crane that realizes the start and stop of an oil pump motor by opening and closing the grab. Background technique [0002] The grab-type universal bridge crane works through the grab hydraulic system to realize the transfer of materials. The main components of the grab are the grab flap, the oil cylinder, the oil pump, the solenoid valve group and the motor. At present, the general design is to start the oil pump, and control the action of the solenoid valve group by operating the handle to realize the opening and closing of the grab. During the whole working process, the oil pump is always in working condition, and the hydraulic oil overflows through the system and returns to the oil tank when the grab bucket is not open or closed. Description of the main problems: ①The opening and closing time of the grab bucket is in the process interval of grabbing and stacking materials, and the material moving fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/20F15B21/08
CPCB66C13/20F15B21/08F15B2211/20515
Inventor 徐晶
Owner CHENGDU XINGRONG RENEWABLE ENERGY CO LTD
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