CN-117072521-B - Control system and method for online automatic oil change and oil supplement of closed hydraulic equipment

CN117072521BCN 117072521 BCN117072521 BCN 117072521BCN-117072521-B

Abstract

The invention relates to a control system and a method for online automatic oil supplementing and changing of closed hydraulic equipment, and belongs to the field of hydraulic control. The oil supplementing device comprises a monitoring module, a scheduling module, an oil changing module, an oil supplementing module and an oil adding device, wherein the monitoring module is electrically connected with the scheduling module, the scheduling module is respectively electrically connected with the oil changing module and the oil supplementing module, the monitoring module detects and judges whether oil supplementing or oil changing is needed for online hydraulic equipment and the number of the oil supplementing or oil changing equipment, the scheduling module schedules according to the oil supplementing requirement and the oil changing requirement, the oil changing module performs oil changing operation when the oil changing condition is met, and the oil supplementing module performs oil supplementing operation when the oil supplementing condition is met. The scheme realizes the automatic oil supplementing and changing control of a plurality of closed hydraulic devices, can meet the oil changing or supplementing requirements of each closed hydraulic device in time, improves the maintenance efficiency, reduces the failure rate of the device, prolongs the service life of the device and reduces the cost.

Inventors

CAI CHUNYANG
YUAN QIANG
KANG JIAN
ZHANG LEI
LIU YU
LONG HAO
CHEN JIANG

Assignees

中冶赛迪技术研究中心有限公司

Dates

Publication Date: 20260505
Application Date: 20230822

Claims (9)

1. The on-line automatic oil supplementing and changing control system is characterized by comprising a monitoring module, a scheduling module, an oil changing module, an oil supplementing module and an oiling device, wherein the monitoring module is electrically connected with the scheduling module, and the scheduling module is respectively and electrically connected with the oil changing module and the oil supplementing module; The monitoring module monitors inlet pressure of a plurality of online hydraulic devices, judges whether the inlet pressure is smaller than a preset inlet pressure threshold, if yes, oil supplementing requirements exist, and judges whether oil supplementing conditions are met; the monitoring module monitors the time interval of the last oil change of a plurality of online hydraulic devices, judges whether the time interval is larger than a preset time interval threshold, if so, judges whether the currently detected online hydraulic devices are in an unoperated state or not, and meets the oil change condition if the currently detected online hydraulic devices are in the unoperated state; The scheduling module schedules according to the oil supplementing requirement and the oil changing requirement, sends out an oil changing instruction to the oil changing module according to the sequence meeting the oil changing condition, and sends out the oil supplementing instruction to the oil supplementing module from large to small according to the intensity of the oil supplementing requirement; the oil change module further comprises a switching time sequence and a time interval for controlling an inlet electromagnetic valve and an outlet electromagnetic valve of the online hydraulic equipment; When the oil replacement condition is met, the oil replacement module controls an electromagnetic valve corresponding to an oil filling loop in the oil filling device and an inlet electromagnetic valve and an outlet electromagnetic valve of the online hydraulic equipment according to the oil replacement instruction to perform oil replacement operation, and when the oil replacement condition is met, the oil replacement module controls the electromagnetic valve of the oil filling loop in the oil filling device and the inlet electromagnetic valve of the online hydraulic equipment according to the oil replacement instruction to perform oil replacement operation.
2. The system of claim 1, further comprising an alarm module for alarming the high temperature of the fuel tank, the low level of the fuel tank and the low pressure of the fuel tank system, sending an alarm signal when the respective alarm conditions are reached, and sending the alarm signal to the monitor module.
3. The on-line automatic oil supplementing and changing control system according to claim 2, wherein the monitoring module judges whether an oil supplementing condition is met according to whether an alarm signal of an oil adding device system is received.
4. The control system for on-line automatic oil supplementing and changing according to claim 3, further comprising a linkage module, wherein the linkage module is used for controlling the oil adding pump of the oil adding device in a linkage mode according to the alarm signal, and the linkage control comprises the steps of starting the standby pump when the oil adding pump is damaged and starting and stopping the heater according to the oil temperature.
5. The system of claim 2, further comprising a parameter module for storing a preset parameter as a warning condition in the warning module, wherein the preset parameter includes a system pressure parameter of the oiling device, a liquid level warning threshold value and an oil temperature heating threshold value.
6. An online automatic oil supplementing and changing control method based on the online automatic oil supplementing and changing control system according to any one of claims 1-5, which is characterized by comprising the following steps: S1, monitoring whether a plurality of online hydraulic devices have oil supplementing requirements and oil changing requirements; Specific: Monitoring inlet pressure of a plurality of online hydraulic devices, judging whether the inlet pressure is smaller than a preset inlet pressure threshold value, and if yes, supplementing oil; Monitoring the time interval between a plurality of online hydraulic devices and the last oil change, judging whether the time interval is larger than a preset time interval threshold, and if so, changing the oil; s2, counting the online hydraulic equipment with oil change requirements, judging whether the oil change conditions are met, and when the online hydraulic equipment is in an unoperated state, marking the oil change priority according to the time sequence that each online hydraulic equipment meets the oil change conditions if the judgment result is yes; s3, judging whether the oiling device normally operates, if so, meeting the oil supplementing condition, and sequentially executing oil supplementing operation on the online hydraulic equipment according to the intensity of the oil supplementing requirement; The method specifically comprises the following steps: The oiling device opens an oiling loop electromagnetic valve, opens an inlet electromagnetic valve of the online hydraulic equipment after a preset waiting time, monitors the inlet pressure of the online hydraulic equipment which is being replenished with oil, closes the inlet electromagnetic valve after the inlet pressure is lifted to an inlet pressure threshold value, closes the oiling loop electromagnetic valve again, completes the oil replenishing operation of the online hydraulic equipment which is being replenished with oil, switches to the next online hydraulic equipment to execute the oil replenishing operation, and executes S4 when the number of the online hydraulic equipment with the oil replenishing requirement is 0; s4, sequentially executing oil change operation on the online hydraulic equipment according to the oil change priority; The method specifically comprises the following steps: Opening a refueling loop electromagnetic valve of a refueling device, opening an inlet electromagnetic valve and an outlet electromagnetic valve of the online hydraulic equipment after a preset waiting time, closing the outlet electromagnetic valve of the online hydraulic equipment currently changing oil after the preset oil changing time is over, monitoring the inlet pressure of the online hydraulic equipment currently changing oil, closing the inlet electromagnetic valve after the inlet pressure is lifted to an inlet pressure threshold value, closing the refueling loop electromagnetic valve, completing the oil changing operation of the online hydraulic equipment currently changing oil, and switching to the next online hydraulic equipment to execute the oil changing operation.
7. The method of claim 6, wherein in S3 and S4, the preset waiting time is determined according to the length of the oil paths of the oil filling device and the on-line hydraulic equipment and the system pressure of the oil filling device.
8. The method of claim 6, wherein determining whether the fuel dispenser is operating properly comprises determining that the fuel dispenser is operating properly when the fuel dispenser system pressure is greater than a predetermined fuel dispenser system pressure parameter, the fuel dispenser level is greater than a low level alarm threshold, and the fuel dispenser temperature is less than a high temperature alarm threshold and greater than a low temperature alarm threshold.
9. The method of claim 6, wherein in S4, if a new oil replacement requirement is detected during the oil replacement operation, S2 to S3 are re-executed after the oil replacement operation is completed.

Description

Control system and method for online automatic oil change and oil supplement of closed hydraulic equipment Technical Field The invention belongs to the field of hydraulic control, and relates to a control system and method for online automatic oil change and oil supplement of closed hydraulic equipment. Background Along with the rapid development and technological transformation of hydraulic technology, closed hydraulic equipment is increasingly widely applied, such as industries of metallurgy, light industry, electric power, chemical industry, mine, coal and the like, but the closed hydraulic equipment is different from a traditional open hydraulic system, has small oil capacity and works by depending on hydraulic oil in the equipment. For adequate pumping of oil, the inside of closed hydraulic equipment is usually maintained at a certain pressure, but since leakage is unavoidable, timely oil replenishment is required to ensure the pressure inside the equipment. In addition, after the equipment works for a long time, because of abrasion and aging of components, in order to ensure normal operation of the equipment, the system stability is improved, the equipment failure rate is reduced, the production operation rate is improved, and the oil is also required to be changed periodically. Therefore, in the use process of the closed hydraulic equipment, equipment inspection and maintenance are important, and timely oil supplementing and periodical oil changing are required. The oil change and oil supplement operation of the current closed hydraulic equipment is mainly finished manually, and particularly for the distributed single closed equipment, the equipment is scattered and has a large number, so that the maintenance is not timely, the cost is high, the efficiency is low, the equipment failure rate is high, the service life is short, and the production operation rate is low. Disclosure of Invention Therefore, the invention aims to provide an online automatic oil supplementing and changing control system and method, which realize quick oil changing or oil supplementing of closed hydraulic equipment through linkage control between the closed hydraulic equipment and an oiling device, and particularly can timely meet the oil changing or oil supplementing requirements of each closed hydraulic equipment when a plurality of closed hydraulic equipment exist at the same time, thereby improving maintenance efficiency, reducing equipment failure rate, prolonging equipment service life and reducing cost. In order to achieve the above purpose, the present invention provides the following technical solutions: The control system comprises a monitoring module, a scheduling module, an oil changing module, an oil supplementing module and an oiling device, wherein the monitoring module is electrically connected with the scheduling module, and the scheduling module is respectively and electrically connected with the oil changing module and the oil supplementing module; The monitoring module monitors inlet pressure of a plurality of online hydraulic devices, judges whether the inlet pressure is smaller than a preset inlet pressure threshold, if yes, oil supplementing requirements exist, and judges whether oil supplementing conditions are met; the monitoring module monitors the time interval of the last oil change of a plurality of online hydraulic devices, judges whether the time interval is larger than a preset time interval threshold, if so, judges whether the currently detected online hydraulic devices are in an unoperated state or not, and meets the oil change condition if the currently detected online hydraulic devices are in the unoperated state; The scheduling module schedules according to the oil supplementing requirement and the oil changing requirement, sends out an oil changing instruction to the oil changing module according to the sequence meeting the oil changing condition, and sends out the oil supplementing instruction to the oil supplementing module from large to small according to the intensity of the oil supplementing requirement; And when the oil supplementing condition is met, the oil supplementing module controls the electromagnetic valve of the oil adding loop in the oil adding device according to the oil supplementing instruction to carry out oil supplementing operation. Noun interpretation: The oil supplementing operation is that the hydraulic oil in the on-line hydraulic equipment leaks along with the use, so that the inlet pressure is low and the production requirement is not met, and the oil supplementing is to supplement the hydraulic oil to the on-line hydraulic equipment; The oil change operation is that the hydraulic oil in the online hydraulic equipment is polluted along with the use, so that the cleanliness level of the hydraulic oil is reduced, the service life of the equipment is influenced, the hydraulic oil needs to be changed, the original polluted hydraulic oil needs to be discharged durin