CN116877404A - DC lubricating oil pump control system - Google Patents
DC lubricating oil pump control system Download PDFInfo
- Publication number
- CN116877404A CN116877404A CN202311095760.0A CN202311095760A CN116877404A CN 116877404 A CN116877404 A CN 116877404A CN 202311095760 A CN202311095760 A CN 202311095760A CN 116877404 A CN116877404 A CN 116877404A
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- CN
- China
- Prior art keywords
- direct current
- control system
- module
- instruction
- starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 24
- 238000005461 lubrication Methods 0.000 claims abstract description 48
- 239000003921 oil Substances 0.000 claims abstract description 23
- 230000008054 signal transmission Effects 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 16
- 238000012423 maintenance Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 5
- 239000000314 lubricant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a direct current lubrication oil pump control system, which comprises: the device comprises an instruction sending module, an instruction executing module and a feedback module; the instruction sending module continuously sends instructions to the instruction executing module; the instruction execution module includes: a power unit and a control unit; the external power supply supplies power to the motor through the power unit, and the control unit works according to the instruction; the command includes a stop command, the control unit does not start the direct current lubrication pump when the stop command is continuously received, and starts the direct current lubrication pump when the stop command is not received; the feedback module is in signal transmission with the instruction execution module and feeds back the working condition of the instruction execution module. According to the invention, through a power-off starting mode, the direct-current lubricating oil pump can be started in time under the condition of power failure in a factory, and an emergency starting button is not required to be configured. Therefore, the defect of electrified starting in the prior art is overcome, and the situation that oil is cut off and the tile is burned because an operator does not press a hard starting button in time is avoided.
Description
Technical Field
The invention relates to a control system, in particular to a direct-current lubricating oil pump control system.
Background
Currently, in plant operation, direct current lubrication pumps are provided, which have an independent power supply, which is usually put into use in the event of total loss of plant power when alternating current is lost. The direct-current lubricating oil pump is the last guarantee that the factory unit can safely stop, and the direct-current lubricating oil pump is guaranteed to be in a hot standby state under any condition.
In order to realize the starting of the direct-current lubrication oil pump, the prior art is that the main contactor is electrified to start the direct-current lubrication oil pump, however, the starting mode is easy to cause the situation that the main contactor cannot be electrified (control system faults and the like), so that the direct-current lubrication oil pump cannot be started, and further the situation that oil is broken and the oil is burned is caused. Although the operation panel is provided with a hard start button, an operator is required to manually press the button to start the direct-current lubricating oil pump in an emergency, and if the operator does not press the hard start button in time, a great risk exists. Therefore, in view of the above problems, it is necessary to propose further solutions.
Disclosure of Invention
The invention aims to provide a direct-current lubricating oil pump control system which overcomes the defects in the prior art.
A direct current lubrication pump control system, the direct current lubrication pump being driven by an electric motor; the direct current lubrication oil pump control system comprises: the device comprises an instruction sending module, an instruction executing module and a feedback module;
the instruction sending module continuously sends instructions to the instruction executing module;
the instruction execution module includes: a power unit and a control unit; an external power supply supplies power to the motor through the power unit, and the control unit works according to the instruction;
the command includes a stop command, the control unit not starting the direct current lubrication pump when the stop command is continuously received, and starting the direct current lubrication pump when the stop command is not received;
and the feedback module is in signal transmission with the instruction execution module and feeds back the working condition of the instruction execution module.
As an improvement of the direct current lubrication oil pump control system of the present invention, the power unit includes: a first maintenance switch and a second maintenance switch; the first maintenance switch is connected with the external power supply so as to isolate the power unit and the control unit from the external power supply; the second maintenance switch is connected with the motor so as to be capable of detecting and isolating the motor.
As an improvement of the direct-current lubrication oil pump control system, the power unit comprises a normally closed main contactor, wherein the normally closed main contactor is provided with three contacts connected in series; when at least one of the three contacts in the series is disconnected, the control unit starts the direct-current lubricating oil pump.
As an improvement of the direct-current lubrication pump control system, the control unit comprises a bistable latching type relay, wherein the bistable latching type relay has a reset state and a set state; when the bistable latching relay is in a reset state, the normally closed primary contactor is kept electrified; when the bistable latching relay is in a setting state, the normally closed primary contactor is kept powered off, and a pulse signal for starting the direct-current lubricating oil pump is triggered.
As an improvement of the direct-current lubrication oil pump control system of the present invention, the command execution module further includes an excitation unit including: a start-up resistor and an adjustable resistor disposed in parallel between the normally closed main contactor and the motor.
As an improvement of the direct-current lubrication oil pump control system, the three groups of starting resistors are arranged in series, and the resistance values of the three groups of starting resistors are different.
As an improvement of the direct-current lubrication oil pump control system, the three groups of starting resistors are also respectively connected with a short circuit line; the shorting lines of any set of starting resistors include: a time relay and a contactor connected in series with the time relay; when the normally closed main contactor is in a closed state, the time relay is activated and the contactor is energized to short the corresponding starting resistor.
As an improvement of the direct current lubrication pump control system of the present invention, the short circuit line of any one set of starting resistors further comprises a miniature circuit breaker connected between the time relay and the normally closed main contactor.
As an improvement of the direct-current lubrication oil pump control system, the adjustable resistor is a wire-wound resistor, and both ends and the middle of the wire-wound resistor are clamped and fixed through temporary terminal clamps; the specification of the wire-wound resistor is one of 5 omega, 10 omega and 15 omega.
As an improvement of the direct current lubrication pump control system, the direct current lubrication pump control system further comprises a direct current measurement module; the direct current measurement module comprises a voltage measurement relay and a direct current shunt, the voltage measurement relay is arranged between the normally closed main contactor and the motor, the direct current shunt is connected to a detection line where the voltage measurement relay is located, and the voltage measurement relay can measure the voltage at two ends of the direct current shunt after the direct current lubrication pump is started.
Compared with the prior art, the invention has the beneficial effects that: in the direct-current lubricating oil pump control system, the contact of the main contactor is in a normally closed state, and in the state, a stop instruction continuously sent by the instruction sending module can be received, and the main contactor does not start the direct-current lubricating oil pump at the moment; when the contact of the main contactor is in an open state, the main contactor does not receive a stop command any more, and the main contactor starts the direct-current lubricating oil pump. Through the power-off starting mode, the direct-current lubricating oil pump can be started in time under the condition of power failure in a factory, and an emergency starting button is not required to be configured. Therefore, the defect of electrified starting in the prior art is overcome, and the situation that oil is cut off and the tile is burned because an operator does not press a hard starting button in time is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic block diagram of a command sending module, a control unit, and a feedback module in a direct current lubrication pump control system according to an embodiment of the present disclosure;
fig. 2 is a schematic block diagram of a command sending module, a power unit, and a feedback module in a direct current lubrication pump control system according to an embodiment of the present disclosure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the present disclosure provides a direct current lubricant pump control system, in which a direct current lubricant pump is driven by a motor M, and the control system of the present embodiment may implement starting of the direct current lubricant pump by driving the motor M to work.
As shown in fig. 1 and 2, the direct-current lubrication oil pump control system of the present embodiment includes: instruction sending module 10, instruction executing module 20 and feedback module 30. The instruction sending module 10 is configured to continuously send an instruction to the instruction executing module 20, so as to control the operation of the instruction executing module 20. In this embodiment, the instruction sending module 10 may be a host or a server in which a preset instruction is stored. The instruction transmitted by the instruction transmitting module 10 may include: a direct-current oil pump driving instruction, a direct-current oil pump stopping instruction, a bistable latching type relay resetting instruction, a bistable latching type relay setting instruction and the like.
The command execution module 20 is used for realizing power-off starting of the direct-current lubrication oil pump under the control of the command sending module 10. Specifically, the instruction execution module 20 includes: a power unit 21 and a control unit 22. Wherein an external power supply supplies power to the motor M via the power unit 21, and the control unit 22 operates according to instructions.
As described above, the instruction transmitted by the instruction transmitting module 10 may include a direct-current oil pump stop instruction. At this time, the control unit 22 does not start the direct-current lubrication pump when the stop instruction is continuously received, and starts the direct-current lubrication pump when the stop instruction is not received. Therefore, by the power-off starting mode, the direct-current lubricating oil pump can be started in time under the condition of power failure in a factory, and an emergency starting button is not required to be configured. Therefore, the defect of electrified starting in the prior art is overcome, and the situation that oil is cut off and the tile is burned because an operator does not press a hard starting button in time is avoided.
The power unit 21 includes: a normally closed main contactor K02, a first maintenance switch S01 and a second maintenance switch S02. Wherein the normally closed main contactor K02 has three contacts in series. The contact of the main contactor is in a normally closed state, and in the state, a stop instruction continuously sent by the instruction sending module 10 can be received, and the main contactor does not start the direct-current lubricating oil pump at the moment; and when at least one of the three contacts in the series of the main contactors is opened, the main contactors no longer receive a stop command, and the control unit 22 synchronously starts the direct-current lubrication pump.
To control the on/off of the normally closed main contactor K02, the control unit 22 includes a bistable latching relay K45, the bistable latching relay K45 having a reset state and a set state. The reset state and the set state can be switched according to the bistable latching relay reset instruction sent by the instruction sending module 10. Thus, when the bistable latching relay K45 is in a reset state, the normally closed primary contactor is kept electrified; when the bistable latching relay K45 is in a set state, the normally closed primary contactor is kept powered off, and a pulse signal for starting the direct-current lubricating oil pump is triggered. The pulse signal for starting the direct-current lubricating oil pump can be set through the functional group of the start-stop lubricating oil system.
The first maintenance switch S01 and the second maintenance switch S02 are used to provide an isolation function to ensure the safety of the power unit 21 and the control unit 22. Wherein the first maintenance switch S01 is used for being connected with an external power source so as to isolate the power unit 21 and the control unit 22 from the external power source. The second maintenance switch S02 is connected to the motor M to enable detection and isolation of the motor M. And the second maintenance switch S02 can also be used for testing the control line of the motor M without the risk of starting the pump.
The instruction execution module 20 further includes an excitation unit 23. The exciting unit 23 includes: the starting resistors R1 to R3 and the adjustable resistor R4 are disposed in parallel between the normally-closed main contactor K02 and the motor M. The starting resistors R1-R3 can avoid over-high starting current when the motor M is started, and the number, the numerical value and other parameters of the starting resistors R1-R3 can be set according to actual requirements. In this embodiment, the starting resistors are preferably three groups. At this time, three sets of starting resistors R1-R3 are arranged in series, and the resistance values of the three sets of starting resistors R1-R3 are different.
To control whether the three sets of starting resistors R1-R3 are put into use, the three sets of starting resistors R1-R3 are also connected with a short circuit line 24, respectively. Thus, when the short-circuit line 24 of the starting resistor is energized, the starting resistor connected thereto is shorted. Specifically, the shorting lines 24 of any one set of starting resistors include: time relays K18-K38 and contactors K21-K41 connected in series with time relays K18-K38. Wherein, when the normally closed main contactor K02 is in the closed state, the time relay is started, and the contactor is energized to short the corresponding starting resistor.
In addition, to protect the three sets of starting resistors R1-R3, the short circuit line 24 of the starting resistors also includes a miniature circuit breaker Q04-Q06, the miniature circuit breaker Q04-Q06 being connected between the time relay K18-K38 and the normally closed main contactor K02. Thus, when the miniature circuit breakers Q04-Q06 are operated, the time relays K18-K38 connected thereto are in a circuit breaking protection state.
The adjustable resistor R4 is used to configure the rotational speed of the motor M to obtain the desired flow from the pump during commissioning. In this embodiment, the adjustable resistor R4 is a wire-wound resistor. At this time, both ends and the middle of the wound resistor are clamped and fixed by the temporary terminal clamps. Therefore, the winding resistor can be kept stable by arranging the temporary terminal clamps at the two ends and the middle of the winding resistor, and the regulated resistance value is not changed due to vibration or human body contact. The wire-wound resistor may have a specification of one of 5Ω, 10Ω, 15Ω.
The feedback module 30 transmits signals to the instruction execution module 20 and feeds back the working condition of the instruction execution module 20, so that a worker can master the running condition of the direct-current lubricating oil pump control system in time. In this embodiment, the feedback module 30 may include a plurality of indicator lamps, and when the instruction execution module 20 executes the corresponding instruction, the status after execution may be displayed by the corresponding indicator lamps.
The instruction execution module 20 further comprises a direct current measurement module 25. The direct current measuring module 25 includes a voltage measuring relay K26 and a direct current shunt U1. The voltage measurement relay K26 is arranged between the normally closed main contactor K02 and the motor M, so that direct current detection is performed after the direct current lubrication pump is started. Specifically, when a direct current exceeding 10% is detected, the relay will alert with a 5 second delay with the dry contact. The direct current shunt U1 is connected to a detection line where the voltage measurement relay K26 is located. The direct current shunt U1 is an accurate resistor capable of passing large current, when the current flows through the shunt, a millivolt voltage is generated at two ends of the direct current shunt, so that the millivolt voltmeter can be used for measuring the voltage, and the measured voltage is converted into the current, so that the measurement of the large current is completed. Thus, the problem that the current meter with the existing measuring range cannot realize large current detection is solved.
In summary, in the direct-current lubrication pump control system of the present invention, the contact of the main contactor is in a normally closed state, and in this state, a stop command continuously sent by the command sending module is received, and at this time, the main contactor does not start the direct-current lubrication pump; when the contact of the main contactor is in an open state, the main contactor does not receive a stop command any more, and the main contactor starts the direct-current lubricating oil pump. Through the power-off starting mode, the direct-current lubricating oil pump can be started in time under the condition of power failure in a factory, and an emergency starting button is not required to be configured. Therefore, the defect of electrified starting in the prior art is overcome, and the situation that oil is cut off and the tile is burned because an operator does not press a hard starting button in time is avoided.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A direct current lubrication pump control system, the direct current lubrication pump being driven by an electric motor; the direct-current lubrication oil pump control system is characterized by comprising: the device comprises an instruction sending module, an instruction executing module and a feedback module;
the instruction sending module continuously sends instructions to the instruction executing module;
the instruction execution module includes: a power unit and a control unit; an external power supply supplies power to the motor through the power unit, and the control unit works according to the instruction;
the command includes a stop command, the control unit not starting the direct current lubrication pump when the stop command is continuously received, and starting the direct current lubrication pump when the stop command is not received;
and the feedback module is in signal transmission with the instruction execution module and feeds back the working condition of the instruction execution module.
2. The direct current lubrication pump control system according to claim 1, wherein the power unit includes: a first maintenance switch and a second maintenance switch; the first maintenance switch is connected with the external power supply so as to isolate the power unit and the control unit from the external power supply; the second maintenance switch is connected with the motor so as to be capable of detecting and isolating the motor.
3. The direct current lubrication pump control system according to claim 1, wherein the power unit comprises a normally closed main contactor having three contacts in series; when at least one of the three contacts in the series is disconnected, the control unit starts the direct-current lubricating oil pump.
4. A direct current lubrication pump control system according to claim 3, wherein the control unit comprises a bistable latching relay having a reset state and a set state; when the bistable latching relay is in a reset state, the normally closed primary contactor is kept electrified; when the bistable latching relay is in a setting state, the normally closed primary contactor is kept powered off, and a pulse signal for starting the direct-current lubricating oil pump is triggered.
5. The direct current lubrication pump control system according to claim 3, wherein the command execution module further includes an excitation unit including: a start-up resistor and an adjustable resistor disposed in parallel between the normally closed main contactor and the motor.
6. The direct current lubrication pump control system according to claim 5, wherein the starting resistors are three groups, the three groups of starting resistors are arranged in series, and the three groups of starting resistors have different resistances.
7. The direct current lubrication pump control system according to claim 6, wherein the three sets of starting resistors are further connected with a short circuit line, respectively; the shorting lines of any set of starting resistors include: a time relay and a contactor connected in series with the time relay; when the normally closed main contactor is in a closed state, the time relay is activated and the contactor is energized to short the corresponding starting resistor.
8. The direct current lubrication pump control system according to claim 7, wherein the shorting lines of any one set of starting resistors further comprise a miniature circuit breaker connected between the time relay and a normally closed main contactor.
9. The direct current lubrication pump control system according to claim 5, wherein the adjustable resistor is a wire-wound resistor, and both ends and the middle of the wire-wound resistor are clamped and fixed by temporary terminal clamps; the specification of the wire-wound resistor is one of 5 omega, 10 omega and 15 omega.
10. The direct current lubrication pump control system of claim 1, further comprising a direct current measurement module; the direct current measurement module comprises a voltage measurement relay and a direct current shunt, the voltage measurement relay is arranged between the normally closed main contactor and the motor, the direct current shunt is connected to a detection line where the voltage measurement relay is located, and the voltage measurement relay can measure the voltage at two ends of the direct current shunt after the direct current lubrication pump is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311095760.0A CN116877404A (en) | 2023-08-29 | 2023-08-29 | DC lubricating oil pump control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311095760.0A CN116877404A (en) | 2023-08-29 | 2023-08-29 | DC lubricating oil pump control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116877404A true CN116877404A (en) | 2023-10-13 |
Family
ID=88262367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311095760.0A Pending CN116877404A (en) | 2023-08-29 | 2023-08-29 | DC lubricating oil pump control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116877404A (en) |
-
2023
- 2023-08-29 CN CN202311095760.0A patent/CN116877404A/en active Pending
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