CN114508688B - Pipeline circulating filtering method for double-line terminal type dry oil centralized lubrication system - Google Patents
Pipeline circulating filtering method for double-line terminal type dry oil centralized lubrication system Download PDFInfo
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- CN114508688B CN114508688B CN202011278131.8A CN202011278131A CN114508688B CN 114508688 B CN114508688 B CN 114508688B CN 202011278131 A CN202011278131 A CN 202011278131A CN 114508688 B CN114508688 B CN 114508688B
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- 238000001914 filtration Methods 0.000 title claims abstract description 69
- 238000005461 lubrication Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003921 oil Substances 0.000 claims description 120
- 239000004519 grease Substances 0.000 claims description 23
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 230000001050 lubricating effect Effects 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 230000003749 cleanliness Effects 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a pipeline circulating filtering method of a double-line terminal type dry oil centralized lubrication system, which comprises the following steps: hooking the loop, installing oil return filtration, setting oil outlet filtration, setting temporary wiring, circulating filtration and the like. The pipeline circulating filtering method of the double-line terminal type dry oil centralized lubrication system provided by the invention can be used for carrying out oil circulating filtering on the double-line terminal type dry oil centralized lubrication system, so that the oil cleanliness is improved, and the method is particularly suitable for controlling the oil cleanliness of a dry oil pipeline after pipeline modification carried out by severe environment, pipeline repair welding and a newly-added distributor.
Description
Technical Field
The invention relates to a pipeline circulating filtering method of a double-line terminal type dry oil centralized lubrication system, and belongs to the technical field of lubrication.
Background
The double-line terminal type dry oil centralized lubrication system is a lubrication system applied to heavy machinery such as ferrous metallurgy, mines and cement, has strong expansibility, is convenient for newly adding lubrication points in the later period, does not influence the integral operation of the system due to single-point blockage, and is widely used. The environment where the equipment is located and secondary pollution caused by routine maintenance such as pipeline replacement, distributor and the like at the later stage all cause pipeline grease pollution, one or more distributors and one or more pistons of the distributors are blocked and do not act, and as the fault distributors or the pistons do not influence the normal operation of the system, the high-temperature, heavy load, cooling water and high-speed severe environment of hot rolling and steel plants are difficult to detect in place at the time, and faults such as high temperature, locking and the like occur to one equipment due to lack of lubrication are caused.
Grease cleanliness of a double-wire terminal type dry oil centralized lubrication system is a necessary condition for ensuring normal and effective operation of the lubrication system. In the prior art, grease filtration is only arranged in a pump outlet or a A, B pipe, so that the cleanliness of the grease of the pump outlet is guaranteed, no subsequent pipeline is arranged, and the grease filtration cannot be performed when the distributor is replaced, the pipeline is subjected to repair welding, the hose is replaced and the pipeline is newly added.
The independent or compatible pipeline circulating filtering device and the control method are of great significance for improving the grease cleanliness and the working stability and effectiveness of the double-line terminal type dry oil centralized lubrication system.
Disclosure of Invention
The invention aims to solve the technical problems that: the pipeline circulating filtering method of the double-line terminal type dry oil centralized lubricating system is based on convenient modification of the existing double-line terminal type dry oil centralized lubricating system, and therefore lubricating oil can be filtered.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a pipeline circulation filtering method of a double-line terminal type dry oil centralized lubrication system comprises the following steps:
step 1: hooking the loop; disassembling a main pipe plug and a plug at the last position of the tail end of each branch of the double-line terminal type dry oil centralized lubrication system, installing a reversing valve, and installing the plugs after the reversing valve;
step 2: mounting and oil return filtering; an oil return filter is arranged on an oil return pipe from a main reversing valve of the double-wire terminal type dry oil centralized lubrication system to the grease storage tank, and a differential pressure switch is arranged on the oil return filter;
step 3: setting oil outlet filtration; when the double-wire terminal type dry oil centralized lubrication system is not provided with an oil outlet filter, the oil outlet filter is arranged on an oil outlet pipe between a main reversing valve and a lubricating oil pump of the double-wire terminal type dry oil centralized lubrication system; when the double-wire terminal type dry oil centralized lubrication system is provided with an oil outlet filter, detecting whether the accuracy of a filter screen of the oil outlet filter meets an accuracy threshold, if so, carrying out the next step, and if not, replacing;
step 4: setting temporary wiring; the reversing valve installed in the step 1 is connected with a corresponding control and power supply line, the differential pressure switch installed in the step 2 is connected with a power supply line and a signal line, and the lubricating oil pump of the double-wire terminal type dry oil centralized lubricating system is connected with the control and power supply line;
step 5: circularly filtering; starting a lubricating oil pump, a corresponding valve of the double-wire terminal type grease centralized lubrication system and the reversing valve installed in the step 1 of one branch of each branch of the double-wire terminal type grease centralized lubrication system, and performing circulating filtration; and after the completion, closing the reversing valve installed in the step 1 of one branch of each branch of the double-wire terminal type dry oil centralized lubrication system, and starting the reversing valve installed in the step 1 of the other branch until the circulation filtration of all branches is completed.
The scheme is further improved as follows: in the step 2, two parallel oil outlet filters are arranged.
The scheme is further improved as follows: in the step 5, if the sum of the flow rates of a plurality of branches in each branch of the two-wire terminal type dry oil centralized lubrication system is less than or equal to the maximum flow rate of the two-wire terminal type dry oil centralized lubrication system, the two-wire terminal type dry oil centralized lubrication system can be started at the same time to perform circulating filtration.
The scheme is further improved as follows: in the step 3, the precision threshold is set by a customer demand.
The scheme is further improved as follows: in the step 3, when the oil outlet filter is required to be replaced, the replacement is performed according to the decreasing sequence of the filtering precision until the precision threshold is met.
The scheme is further improved as follows: and (5) recovering the original pipeline and the original electric circuit after the step (5).
The pipeline circulating filtering method of the double-line terminal type dry oil centralized lubrication system provided by the invention can be used for carrying out oil circulating filtering on the double-line terminal type dry oil centralized lubrication system, so that the oil cleanliness is improved, and the method is particularly suitable for controlling the oil cleanliness of a dry oil pipeline after pipeline modification carried out by severe environment, pipeline repair welding and a newly-added distributor.
Drawings
Fig. 1 is a schematic view of an application scenario of a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of the appliance control of fig. 1.
Fig. 3 is a control schematic of the lubricant pump of fig. 1.
Fig. 4 is a schematic diagram of a dry oil filter structure.
Fig. 5 is a schematic view of a filter cartridge.
Fig. 6 is an enlarged view of a portion of a filter cartridge.
Description of the embodiments
Examples
The pipeline circulation filtering method of the double-line terminal type dry oil centralized lubrication system of the embodiment comprises the following steps:
step 1: hooking the loop; disassembling a main pipe plug and a plug at the last position of the tail end of each branch of the double-line terminal type dry oil centralized lubrication system, installing a reversing valve, and installing the plugs after the reversing valve;
step 2: mounting and oil return filtering; an oil return filter is arranged on an oil return pipe from a main reversing valve of the double-line terminal type dry oil centralized lubrication system to the oil storage tank, and a differential pressure switch is arranged on the oil return filter;
step 3: setting oil outlet filtration; when the double-line terminal type dry oil centralized lubrication system is not provided with the oil outlet filter, the oil outlet filter is arranged on an oil outlet pipe between a main reversing valve of the double-line terminal type dry oil centralized lubrication system and the lubricating oil pump; when the double-wire terminal type dry oil centralized lubrication system is provided with an oil outlet filter, detecting whether the oil outlet filter meets the accuracy threshold value required by a customer, if so, carrying out the next step, and if not, replacing; when the oil outlet filter is required to be replaced, replacing according to the decreasing sequence of the filtering precision until the precision threshold is met;
step 4: setting temporary wiring; the reversing valve installed in the step 1 is connected with a corresponding control and power supply line, the differential pressure switch installed in the step 2 is connected with the power supply line and a signal line, and the lubricating oil pump of the double-line terminal type dry oil centralized lubricating system is connected with the control and power supply line;
step 5: circularly filtering; starting a lubricating oil pump, a corresponding valve of a double-line terminal type grease centralized lubrication system and a reversing valve arranged in the step 1 of one branch of each branch of the double-line terminal type grease centralized lubrication system, and performing circulating filtration; and after the completion, closing the reversing valve arranged in the step 1 of one branch in each branch of the double-line terminal type dry oil centralized lubrication system, and starting the reversing valve arranged in the step 1 of the other branch until the circulation filtration of all the branches is completed.
In particular, taking the two-wire terminal type dry oil centralized lubrication system shown in FIG. 1 as an example,
step 1: disassembling the end branch-last distributor 34 to host plugs 80 and 81, installing the reversing valve 51, and installing the plugs 80 and 81 behind the reversing valve; and forming a circulating filtering branch I.
Disassembling the end branch second last distributor 36 to host the plugs 82 and 83, installing the reversing valve 52, and installing the plugs 82 and 83 behind the reversing valve; and forming a second circulating filtering branch.
Disassembling the end branch three-final distributor 41 to host plugs 84 and 85, installing the reversing valve 53, and installing the plugs 84 and 85 behind the reversing valve; and forming a circulating filtering branch III.
Disassembling the plugs 86 and 87 of the distributor 42 at the four last positions of the tail end branch, installing the reversing valve 53, and installing the plugs 86 and 87 behind the reversing valve; and a circulating filtering branch circuit IV is formed.
Disassembling the five last distributor 44 of the tail end branch to host plugs 88 and 89, installing the reversing valve 53, and installing the plugs 88 and 89 behind the reversing valve; and a circulating filtering branch circuit five is formed.
Disassembling plugs 90 and 91 of the main pipe of the distributor 46 at the six final positions of the tail end branch, installing the reversing valve 53, and installing the plugs 90 and 91 behind the reversing valve; and forming a circulating filtering branch six.
Step 2: the original pipeline system reversing valve 25 is disassembled to the hard pipe of the grease storage tank, and the oil return filter 6 and the oil return filter 7 are installed in parallel. The oil return filter 6 and the oil return filter 7 are used as one, and the filter element can be replaced on line after the alarm of the filtration pressure difference. The oil return filter 6 and the oil return filter 7 are respectively provided with a pressure difference switch 4 and a pressure difference switch 5. The signaling pressures of the differential pressure switch 4 and the differential pressure switch 5 are adjusted to meet the design requirement.
Step 3: the oil outlet filter 23 is arranged in the double-wire terminal type dry oil centralized lubrication system in the embodiment, and the requirement is met without modification; if the precision is not satisfied, if a GGQ-P series dry oil filter (JB/ZQ 4702-98) is adopted by most of the current oil filters, the precision of the filter screen is 120 mu m, and the precision threshold value of the client needs to be 74 mu m, at the moment, the filter screen with the original precision of 120 mu m can be removed, and the filter screens with the filter precision of 104 mu m, 89 mu m, 74 mu m and 61 mu m are gradually replaced according to the fact that the actual pollution degree of the lubricating grease is low and high; the filter screen can be designed by oneself.
The oil return filter can also be operated according to the operation, and in the circulating filtration, the periodic detection is carried out, if the requirement is met, the next step is carried out, and if the requirement is not met, the replacement is carried out.
As shown in fig. 4, 5 and 6, the oil filter includes: the device comprises a threaded plug 101 with a guide, a dry oil filter body 102, a filter screen assembly 103, an oil outlet 104 and an oil inlet 105.
The assembled filter screen assembly 103 is assembled into the dry oil filter body 102 from top to bottom, the guide is inserted into the tape Kong Najuan 202 of the filter screen assembly 103, screwed into the threaded plug 101 with the guide, and tightened.
The screen assembly 103 includes a perforated collar 201, screws 203, straps Kong Najuan 202, and a screen 204.
The band Kong Najuan 202 is formed by rolling and welding a flat plate with holes, and has many threaded holes formed in the axial direction of the outer surface.
The outer ring 202 with holes is formed by rolling and welding a flat plate with holes, the inner diameter band Kong Najuan is in clearance fit, and bolt through holes are formed in the inner diameter band Kong Najuan and matched with the threaded holes in the axial direction of the outer surface of the inner diameter band Kong Najuan.
The filter screen 204 is coated on the inner ring 202 with holes, redundant filter screens are cut off after certain overlapping is kept, the outer ring 202 with holes is sleeved, screws 203 are penetrated, the filter screen 204 is fixed on the inner ring with holes, and the filter screen is prevented from gathering or moving under the action of high-pressure lubricating grease. The formation of voids reduces or even loses the filtering effect.
Grease enters from the oil inlet 105, passes through the filter screen assembly 103, and under the action of the filter screen 204, impurities larger than the filter screen holes are isolated by the filter screen, so that the filter screen is changed in a gradually decreasing order according to the filtering precision, the impurities with large particles are filtered firstly, and then the impurities with small particles are filtered, so that the reduction of impurity pollution after the circulating filtration of the grease is realized.
When the screen pack 103 is not clogged with foreign substances, the difference between the oil pressure at the oil inlet 105 and the oil pressure at the oil outlet 104 is merely a loss along the way.
When the filter screen assembly 103 is blocked by impurities, the difference value between the oil pressure at the oil inlet 105 and the oil pressure at the oil outlet 104 gradually increases along with the blocking degree, and even is completely blocked, at the moment, the difference value between the oil pressure at the oil inlet 105 and the oil pressure at the oil outlet 104 gradually increases, and when the set value of the differential pressure switch is reached, the differential pressure switch acts to trigger a system alarm signal.
Step 4: the solenoid valve coil temporary hole and the power supply line are connected with the reversing valve 51, the reversing valve 52, the reversing valve 53, the reversing valve 54, the reversing valve 55 and the reversing valve 56; removing an original power line of the lubricating oil pump 22, and connecting a temporary control and a power supply line; and a power supply line and a signal line of the differential pressure switch 4 and the differential pressure switch 5 are connected.
Step 5: in this embodiment, as shown in fig. 1, there are 3 groups of branches, and the 3 groups of branches are divided into 2 branches, so that a 3-3 distribution manner is adopted, that is, the cyclic filtration is performed according to the order of the first branch, the fourth branch, the second branch, the fifth branch, the third branch and the third branch 6.
Referring to fig. 2, in the drawings, Y1 corresponds to a solenoid valve 51, Y2 corresponds to a solenoid valve 52, Y3 corresponds to a solenoid valve 53, Y4 corresponds to a solenoid valve 54, Y5 corresponds to a solenoid valve 55, and Y6 corresponds to a solenoid valve 56.
Knobs SB1, SB2, SB3, SB4, SB5, SB6 may be manually selected to require a bypass of cyclic filtration.
SB1 corresponds to the solenoid valve 51, SB2 corresponds to the solenoid valve 52, SB3 corresponds to the solenoid valve 53, SB4 corresponds to the solenoid valve 54, SB5 corresponds to the solenoid valve 55, SB6 corresponds to the solenoid valve 56.
As shown in fig. 3, QF is closed and the lubricant pump 22 is ready for start-up.
And pressing a start button SB8, powering up a coil of the relay K3, and closing a normally open contact of the relay K3 to form a control loop self-locking.
Rotating SB1 and SB4 to be in the on state; SB2, SB3, SB5, SB6 are in the closed state.
The motor 21 of the lubricating oil pump 22 is started. The lubricating oil pump 22 supplies oil normally and enters the pipe system through the pipe B. At this time, when KT1 is powered on, the normally closed contact of KT1 is in a suction state, the solenoid valve coil Y1 of the reversing valve 51 is powered on, and the two main pipes of branch one A, B are in a communication state. The lubricating grease starts to circularly filter the first circulating filter branch.
When the set time of KT1 is up, the normally closed contact of KT1 is delayed to be broken, the relay K1 is powered off, the corresponding normally open contact K1 is attracted, and the power receiving of KT2 starts to be timed.
When the set time of KT1 is up, the corresponding normally open contact is in delayed attraction; the reversing valve 54 is powered on by the solenoid valve coil Y4, and two main pipes of the branch four A, B are in a communication state. The lubricating grease starts to circularly filter the fourth circulating filter branch.
When the set time of KT2 is up, the normally closed contact of KT2 is opened in a delayed way, the whole circuit is opened, and single 1-4 cycle filtration is completed.
And selecting corresponding knobs subsequently, and performing the second-time branch and branch 5 and the third-time branch and branch six-cycle filtering operation method similarly.
The mode of circulating filtration operation of each branch is suitable for a large-scale centralized lubrication system, and the number of the distributors is large because of the difference of branch, and the circulating filtration effect of the multiple branches is not obvious, but the method is very effective if the distributor is newly added on site or when a certain distributor is replaced.
When the flow rate of the lubricating oil pump is large or the number of the branch distributors is small, as shown in fig. 1, each branch distributor is less than 10, the sum of the flow rates of the branch I, the branch II and the branch III is smaller than or equal to the flow rate of the lubricating oil pump, and the sum of the flow rates of the branch IV, the branch five and the branch six is smaller than or equal to the flow rate of the lubricating oil pump, the grouping circulation filtering operation mode can be adopted.
The method comprises the following specific steps: QF is closed, and the lubricating oil pump is started and prepared.
And pressing a start button SB8, powering up a coil of the relay K3, and closing a normally open contact of the relay K3 to form a control loop self-locking.
The rotations SB1, SB2, SB3, SB4, SB5, SB6 are all in the on state;
the motor 21 of the lubricating oil pump 22 is started. The lubricating oil pump 22 supplies oil normally and enters the pipe system through the pipe B. At this time, when KT1 is powered on, the normally closed contact of KT1 is in a suction state, the solenoid valve coil Y1 of the reversing valve 51, the solenoid valve coil Y2 of the reversing valve 52 and the solenoid valve coil Y3 of the reversing valve 53 are powered on, and the main pipes of the branch I, the branch II and the branch III A, B are in a communication state. The lubricating grease starts to circularly filter the first branch, the second branch and the third branch of the circular filtering.
When the set time of KT1 is up, the normally closed contact of KT1 is delayed to be broken, the relay K1 is powered off, the corresponding normally open contact K1 is attracted, and the power receiving of KT2 starts to be timed.
When the set time of KT1 is up, the corresponding normally open contact is in delayed attraction; the solenoid valve coil Y4 of the reversing valve 54, the solenoid valve coil Y5 of the reversing valve 55 and the solenoid valve coil Y6 of the reversing valve 56 are powered, and the main pipes of the branch four, the branch five and the branch six A, B are in a communication state. The lubricating grease starts to circularly filter the fourth branch, the fifth branch and the sixth branch of the circular filtering.
When the set time of KT2 is up, the normally closed contact of KT2 is opened in a delayed way, the whole circuit is opened, and the packet circulation filtration is completed.
Step 6: alarming and disposing;
when the oil return filter 6 is blocked, the oil inlet and outlet pressures of the distributor are unequal, the oil is fed back to the differential pressure switch 4, the differential pressure signal P alarms, the normally open contact is closed, the alarm lamp H1 is on, the buzzer D sounds, the KT3 time relay is electrified and timed, after a period of time, the KT3 normally closed contact is delayed to be disconnected, the buzzer stops, meanwhile, the relay K2 is electrified, the normally closed contact of the relay K2 is disconnected, the solenoid valve coil Y1 of the reversing valve 51, the solenoid valve coil Y2 of the reversing valve 52, the solenoid valve coil Y3 of the reversing valve 53, the solenoid valve coil Y4 of the reversing valve 54, the solenoid valve coil Y5 of the reversing valve 55 and the solenoid valve coil Y6 of the reversing valve 56 are all in power failure, the normally closed contact of the relay K2 is disconnected, the lubricating pump motor is in power failure and stops working, and the circulating filtration is stopped.
Switching to another group of filters on site, restarting the system, and circularly filtering again.
FR takes motor thermal protection signal, when motor is overheated, its overload protection principle is the same as pressure warning.
Step 7: restoring the original pipeline and the original electric circuit;
in the circulating filtration, the filtration precision is determined by the filter element precision of the filter 4 and the filter 5, and after the filtration is completed, the temporary pipeline, the reversing valve 51, the reversing valve 52, the reversing valve 53, the reversing valve 54, the reversing valve 55 and the reversing valve 56 are required to be removed, so that all original pipelines are restored; the temporary line of the lubricating pump needs to be removed, and the original wiring is restored. And after the startup debugging is normal, delivering the system for use.
The present invention is not limited to the above-described embodiments. All technical schemes formed by adopting equivalent substitution fall within the protection scope of the invention.
Claims (6)
1. A pipeline circulation filtering method of a double-line terminal type dry oil centralized lubrication system is characterized by comprising the following steps of:
step 1: hooking the loop; disassembling a main pipe plug and a plug at the last position of the tail end of each branch of the double-line terminal type dry oil centralized lubrication system, installing a reversing valve, and installing the plugs after the reversing valve;
step 2: mounting and oil return filtering; an oil return filter is arranged on an oil return pipe from a main reversing valve of the double-wire terminal type dry oil centralized lubrication system to the grease storage tank, and a differential pressure switch is arranged on the oil return filter;
step 3: setting oil outlet filtration; when the double-wire terminal type dry oil centralized lubrication system is not provided with an oil outlet filter, the oil outlet filter is arranged on an oil outlet pipe between a main reversing valve and a lubricating oil pump of the double-wire terminal type dry oil centralized lubrication system; when the double-wire terminal type dry oil centralized lubrication system is provided with an oil outlet filter, detecting whether the accuracy of a filter screen of the oil outlet filter meets an accuracy threshold, if so, carrying out the next step, and if not, replacing;
step 4: setting temporary wiring; the reversing valve installed in the step 1 is connected with a corresponding control and power supply line, the differential pressure switch installed in the step 2 is connected with a power supply line and a signal line, and the lubricating oil pump of the double-wire terminal type dry oil centralized lubricating system is connected with the control and power supply line;
step 5: circularly filtering; starting a lubricating oil pump, a corresponding valve of the double-wire terminal type grease centralized lubrication system and the reversing valve installed in the step 1 of one branch of each branch of the double-wire terminal type grease centralized lubrication system, and performing circulating filtration; and after the completion, closing the reversing valve installed in the step 1 of one branch of each branch of the double-wire terminal type dry oil centralized lubrication system, and starting the reversing valve installed in the step 1 of the other branch until the circulation filtration of all branches is completed.
2. The method for circulating and filtering the pipeline of the two-wire terminal type dry oil centralized lubrication system according to claim 1, wherein the method comprises the following steps of: in the step 2, two parallel oil outlet filters are arranged.
3. The method for circulating and filtering the pipeline of the two-wire terminal type dry oil centralized lubrication system according to claim 1, wherein the method comprises the following steps of: in the step 5, if the sum of the flow rates of a plurality of branches in each branch of the two-wire terminal type dry oil centralized lubrication system is less than or equal to the maximum flow rate of the two-wire terminal type dry oil centralized lubrication system, the two-wire terminal type dry oil centralized lubrication system can be started at the same time to perform circulating filtration.
4. The method for circulating and filtering the pipeline of the two-wire terminal type dry oil centralized lubrication system according to claim 1, wherein the method comprises the following steps of: in the step 3, the precision threshold is set by a customer demand.
5. The method for circulating and filtering the pipeline of the two-wire terminal type dry oil centralized lubrication system according to claim 4, wherein the method comprises the following steps of: in the step 3, when the oil outlet filter is required to be replaced, the replacement is performed according to the decreasing sequence of the filtering precision until the precision threshold is met.
6. The method for circulating and filtering the pipeline of the two-wire terminal type dry oil centralized lubrication system according to claim 1, wherein the method comprises the following steps of: and (5) recovering the original pipeline and the original electric circuit after the step (5).
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| CN206449393U (en) * | 2017-01-21 | 2017-08-29 | 太原理工大学 | Tracking and control system of a kind of centralized lubrication for fat pipeline and terminal digital signals |
| DE102018217289A1 (en) * | 2017-10-25 | 2019-04-25 | Vhit S.P.A. Societa Unipersonale | Hydraulic circuit with return line |
| CN208074548U (en) * | 2018-01-29 | 2018-11-09 | 南通信仁润滑液压设备有限公司 | Double-line type centralized lubricating system |
| CN208605905U (en) * | 2018-07-13 | 2019-03-15 | 中钢集团西安重机有限公司 | A kind of two-wire system grease lubricating system |
| CN209725808U (en) * | 2019-03-14 | 2019-12-03 | 江苏中科朗润智能科技有限公司 | A kind of lubricating oil oil feeding system for realizing fining fuel feeding |
| CN210219262U (en) * | 2019-05-31 | 2020-03-31 | 中国核工业电机运行技术开发有限公司 | Centralized intelligent lubricating and bearing monitoring system |
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