CN111271303B - Oil station electric control system, ventilator unit control system and control method - Google Patents
Oil station electric control system, ventilator unit control system and control method Download PDFInfo
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- CN111271303B CN111271303B CN202010073993.0A CN202010073993A CN111271303B CN 111271303 B CN111271303 B CN 111271303B CN 202010073993 A CN202010073993 A CN 202010073993A CN 111271303 B CN111271303 B CN 111271303B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- 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
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- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention belongs to a fan unit control system, and provides an oil station electric control system, a fan unit control system and a control method for solving the technical problems that the fan unit control logic is simple, control points are distributed scattered, and the fan unit can not independently complete control; the controlled object can be in various combinations and is connected with the corresponding relay module switch. The control system of the ventilator unit is based on an oil station control system and is matched with an automatic control system for collecting and analyzing the working data of the ventilator unit, and the control method of the control system is to start the oil station and the preparation before the operation of the fan and control in the working process.
Description
Technical Field
The invention belongs to a fan unit control system, and particularly relates to an oil station electric control system, a fan unit control system and a control method.
Background
At present, the matching equipment of a medium and small-sized ventilator and a blower generally comprises an oil station, a motor, an electric actuator, a gear box, a liquid couple and the like, the low-voltage load of the matching equipment is small, the control logic is simple, the control points are distributed scattered, and the number of the low-voltage equipment on the oil station is the largest. The general fan unit includes oil station, fan and motor, and supporting control is generally that the oil station sets up an electrical control box, and motor heater or the device that tests vibration in the motor respectively set up a control box, and oil station and motor control respectively. Before the fan unit starts to work, the oil station is started firstly, oil is supplied to the fan and relevant units of the motor through pipelines, then the motor is started to run, and the fan rotates under the driving of the motor to work. In addition, along with the influence of engineering modularization design thinking, the user hopes that the fan unit can independently accomplish the control of low pressure load, only proposes the power consumption condition can.
Disclosure of Invention
The invention mainly aims to solve the technical problems that in the prior art, a fan unit is simple in control logic, control points are distributed scattered, and control of the fan unit cannot be independently completed, and provides an oil station electric control system, a fan unit control system and a control method.
In order to achieve the purpose, the invention provides the following technical scheme:
an oil station electric control system is characterized in that,
the system comprises a plurality of control units and a plurality of controlled objects which are in one-to-one correspondence with the control units; the control units are integrated in the same electrical control cabinet;
the control unit comprises a change-over switch SA, a first control module, a second control module and a relay module; the relay module comprises a relay coil KM1, a first normally open contact switch KM12 and a second normally open contact switch KM 13;
two input ends of the change-over switch SA are connected with a three-phase power supply, two output ends of the change-over switch SA are respectively connected with the first control module and the second control module correspondingly, and the first control module/the second control module is switched to be connected with the three-phase power supply through the change-over switch SA; the first control module and the second control module are connected in parallel and then connected in series with the relay coil;
the first control module comprises a normally closed manual switch SK1 and a manual switch SK2 which are connected in series, and the first normally open contact switch KM12 is connected with the manual switch SK2 in parallel; the manual switch SK2 is used for being manually closed when needing to be started, and the normally closed manual switch SK1 is used for being manually opened when needing to be stopped;
the second control module comprises a first normally closed switch KM11 and a second normally open switch KM21 which are connected in series and acts according to an oil station work instruction sent by an upper computer; the second normally-open contact switch KM13 is connected in parallel with the second normally-open switch KM 21; the second normally open switch KM21 is used for being controlled to be closed when the vehicle needs to be started, and the first normally closed switch KM11 is used for being controlled to be opened when the vehicle needs to be stopped;
the first normally open contact switch KM12 and the second normally open contact switch KM13 are respectively connected to a power supply loop of a controlled object; the plurality of controlled objects are divided into a first object group, a second object group and a third object group;
the controlled object of the first object group comprises a motor group and an oil station;
the controlled objects of the second object group comprise main motor heaters and/or cooling fans;
the controlled object of the third object group comprises an oil pump and/or an oil tank heater.
Further, the first object group comprises a motor group and an oil station; the second object group includes a main motor heater and a cooling fan; the third object group includes an oil pump group and an oil tank heater.
Furthermore, the system also comprises a low-voltage load power distribution connected with the three-phase power supply through a normally closed switch.
Furthermore, the system also comprises a standby interface connected with the three-phase power supply.
Further, a thermal relay protection K2 is connected between the oil pump of the third object group and the corresponding first normally open contact switch KM12 or second normally open contact switch KM 13.
A control system of a ventilator unit is characterized by comprising an automatic control system and the oil station electric control system;
the automatic control system is connected with the oil station electric control system, the fan, the motor and the oil station, and is used for acquiring real-time working data of the fan, the motor and the oil station, comparing and analyzing the real-time working data with a preset value, and sending a working instruction to the oil station electric control system; meanwhile, the fan, the motor and the oil station are controlled to work by sending a working instruction to the oil station electric control system;
and the oil station electric control system is used for receiving the working instruction of the automatic control system and controlling the fan, the motor and the oil station according to the control working instruction.
The control method using the ventilator group control system is characterized by comprising the following steps:
s1, starting the oil station
S1.1, the automatic control system sends an oil station work instruction to an oil station electric control system;
s1.2, an oil station electric control system receives an oil station work instruction, and controls a first normally closed switch KM11 and a second normally open switch KM21 corresponding to an oil station to be closed, at the moment, a relay coil KM1 is electrified to control a second normally open contact switch KM13 to be closed, and the oil station starts to work;
or the oil station electric control system receives an oil station work instruction, the first normally open contact switch SK1 and the manual switch SK2 are manually closed, at the moment, the relay coil KM1 is electrified, the first normally open contact switch KM12 is controlled to be closed, and the oil station starts to work;
s2, preparing and starting the running of the fan
S2.1, the automatic control system collects and judges whether the opening of an inlet valve of the fan meets a preset value, whether an emptying valve is fully opened and whether a check valve is fully closed;
s2.2, the automatic control system collects and judges that the pipeline pressure between the oil station and the fan and the pipeline pressure between the oil station and the motor accord with a preset value;
s2.3, the automatic control system collects and judges that the temperature and the liquid level of an oil tank of the oil station accord with preset values;
s2.4, if the automatic control system collects and judges that all items from the step S2.1 to the step S2.3 are yes, sending a starting prompt, and starting a motor power supply to work after receiving the prompt by an operator;
s2.5, closing a first normally closed switch KM11 and a second normally open switch KM21 corresponding to the motor group, wherein at the moment, a relay coil KM1 is electrified to control the second normally open contact switch KM13 to be closed, and starting the motor to work;
or the oil station electric control system receives an oil station work instruction, the first normally open contact switch SK1 and the manual switch SK2 are manually closed, at the moment, the relay coil KM1 is electrified, the first normally open contact switch KM12 is controlled to be closed, and the motor starts to work;
s3, control of operation
In the working process of the ventilator unit, the automatic control system acquires the running data of the fan, the oil station and the motor in real time, and if the running data deviates from a preset value range and is within a preset safety value range, the automatic control system sends out an adjustment prompt; if the safety value exceeds the preset safety value range, a stop instruction is sent to the oil station electric control system, the oil station electric control system controls the fan, the oil station and the relay coil KM1 corresponding to the motor to be disconnected, the ventilation unit stops running, and meanwhile, the automatic control system sends an alarm prompt.
Further, in step S1.2, the oil station start-up operation is specifically that only one oil pump in the oil station starts up, and in step S3, if the pressure of the oil pump is lower than the lower limit of the preset value range and within the preset safety value range, which is acquired and judged by the automatic control system, an adjustment prompt is sent, and other oil pumps are started to operate simultaneously.
Further, the starting of other oil pumps and the simultaneous working are specifically that the automatic control system sends a starting standby oil pump instruction to the oil station electric control system, the oil station electric control system receives the starting standby oil pump instruction and controls the first normally-closed switch KM11 and the second normally-open switch KM21 corresponding to the oil pumps to be closed, at this time, the relay coil KM1 is electrified to control the second normally-open contact switch KM13 to be closed, and the oil pumps start to work;
or the oil station electric control system receives a command of starting the backup oil pump, manually closes the first normally open contact switch SK1 and the manual switch SK2, at the moment, the relay coil KM1 is electrified, controls the first normally open contact switch KM12 to be closed, and the oil pump starts to work.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the oil station electric control system, the motor set, the oil station and the main units in the oil station respectively complete control of the working states of the oil station through the same control unit, and as the control units of all parts are the same, signal interference among the control units is smaller, and the oil station electric control system is convenient for preparing related components on site, reduces maintenance cost and improves maintenance convenience; on the basis of the relay module, each control unit can be controlled by two control modules connected in parallel. One control module can enable the corresponding relay module to be electrified by manually closing the corresponding switch, so that the control module works to drive the corresponding motor set, the oil station and the main units in the oil station to work in an electrified way; the switch of the other control module can be opened and closed through the matching of receiving instructions, and then the corresponding motor set, the oil station and the main units in the oil station are driven to work in an electrified mode. Provides two control modes for users to choose, and also increases the production safety in the control process. In addition, through the combination of three groups of control objects, the motor set, the oil station and each unit inside the oil station can be accurately controlled according to the requirement. In addition, the control of the oil station and the motor set is integrated in the oil station electric control system, and compared with the original mode that the oil station and the motor set are respectively controlled, the production cost and the control difficulty are effectively reduced.
2. The oil station electric control system also comprises low-voltage load power distribution connected through the normally closed switch, and other related normally closed electrified low-voltage load power distribution is integrated in the oil station electric control system, so that the integration level is higher.
3. The invention also reserves a spare interface, so that the control of the electric control system is more flexible, and if other controlled parts need to be accessed on site, the electric control system only needs to be connected with the spare interface.
4. The oil pump is connected with the heat relay protection, so that the safety of the whole electric control system is improved.
5. The control system of the ventilator unit is matched with the automatic control system and the oil station electric control system to form a complete control system of the ventilator unit, wherein the automatic control system can collect and analyze working data of each part of the ventilator unit, and control each part of the ventilator unit to work by sending related instructions to the oil station electric control system according to the difference between the working data and preset conditions after comparing and analyzing the working data with the preset conditions. Possess above-mentioned oil station electrical system's all technological effects, make whole ventilation unit can realize two kinds of control selections of manual control and automatic control, ventilation unit work security is higher, controls more conveniently.
6. The control method is based on the ventilator unit control system, the oil station is started through the oil station electric control system, the oil station can be started through the oil station electric control system to automatically communicate with the corresponding switch after receiving an oil station working instruction, so that the corresponding loop of the oil station is electrified, and the corresponding switch can be manually closed to realize the electrification of the corresponding loop after receiving the oil station working instruction; before the fan runs, the working states of all the working units are respectively confirmed through an automatic control system, so that the fan is guaranteed to run in a safe state, and the safety is improved; the motor is started to work in a manual or automatic selectable mode; the automatic control system collects fan operation data in real time in the working process of the ventilator unit, if the fan operation data exceed a safety threshold value, a shutdown instruction is sent to the oil station electric control system, and the corresponding working module stops operating by disconnecting the control unit of the corresponding relay module, so that safe shutdown is realized. The whole working process of the ventilator unit can realize automatic control based on the control system, meanwhile, manual control can be appropriately intervened, and safe operation of the whole ventilator unit is comprehensively guaranteed. In addition, because control all is based on the same control unit for cost of maintenance effectively reduces, also be convenient for the spare parts of production field prepare and change, and the work and the control management and control of whole ventilation unit are more convenient, and the operation is simpler.
7. When the working pressure of one oil pump is lower, other oil pumps are started to work, and the economical efficiency of the oil pump work and the safety of the whole ventilator unit work are considered.
Drawings
FIG. 1 is a schematic structural diagram of a control unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control structure of an oil pump in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of an embodiment of a control system for a ventilator group according to the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
The oil station control system is redefined, an integrated design idea is adopted, the oil station electric control system is provided, the oil station, the motor set and the work control of all parts inside the oil station are all integrated in the same oil station electric control system, only one oil station control box is needed, the control of the oil station and the motor set can be completed, the overall cost of the fan set is reduced, and meanwhile, the operation of a user is simpler and more convenient.
In one embodiment of the oil station electric control system, the oil station electric control system comprises a plurality of control units and a plurality of controlled objects which are in one-to-one correspondence with the control units; the control units are integrated in the same electrical control cabinet; the number of the control units is determined by the field control requirements of the oil station and the electric generating set, and can be adjusted properly.
As shown in fig. 1, the control unit includes a transfer switch SA, a first control module, a second control module and a relay module; the relay module comprises a relay coil KM1, a first normally open contact switch KM12 and a second normally open contact switch KM 13; the opening and closing of the first normally open contact switch KM12 or the second normally open contact switch KM13 are controlled by the same relay coil KM 1.
Two input ends of the change-over switch SA are connected with a three-phase power supply, two output ends of the change-over switch SA are respectively connected with the first control module and the second control module, the first control module/the second control module are switched to be connected with the three-phase power supply through the change-over switch SA, and when the change-over switch SA correspondingly enables the first control module to be connected, if the relay coil KM1 is electrified, the first normally open contact switch KM12 is correspondingly attracted; similarly, when the second control module is correspondingly communicated through the change-over switch SA, if the relay coil KM1 is electrified, the second normally open contact switch KM13 is correspondingly attracted. The first control module and the second control module are connected in parallel and then connected in series with the relay coil;
the first control module comprises a normally closed manual switch SK1 and a manual switch SK2 which are connected in series, and the first normally open contact switch KM12 is connected with the manual switch SK2 in parallel; the manual switch SK2 is used for being manually closed when needing to be started, and the normally closed manual switch SK1 is used for being manually opened when needing to be stopped;
the second control module comprises a first normally closed switch KM11 and a second normally open switch KM21 which are connected in series and acts according to an oil station work instruction sent by an upper computer; the second normally-open contact switch KM13 is connected in parallel with the second normally-open switch KM 21; the second normally open switch KM21 is used for being controlled to be closed when the vehicle needs to be started, and the first normally closed switch KM11 is used for being controlled to be opened when the vehicle needs to be stopped;
and the first control module or the second control module is communicated through different connection relations of the change-over switch SA. The on-off of the first control module can be switched on and off through a manual control manual switch SK2, and the on-off of the second control module can be switched on and off through connection with other automatic controls, so that the oil station electric control system can realize switching between manual control and automatic control, and operation is more flexible.
The controlled objects are divided into a first object group, a second object group and a third object group;
the first object group comprises a motor group and an oil station; the second object group comprises a main motor heater and/or a cooling fan; the third object group comprises an oil pump and/or an oil tank heater; the controlled objects can be combined at will according to the control requirements in the production field, the whole motor set and the oil station can be controlled, and only some parts can be controlled. If the selected controlled object comprises an oil pump, a thermal relay protection K2 can be connected between the oil pump and the corresponding first normally-open contact switch KM12 or second normally-open contact switch KM13 so as to improve safety.
The controlled objects are respectively connected with the corresponding first normally open contact switch KM12 or second normally open contact switch KM13, so that the controlled objects are controlled by the control unit.
In addition, the oil station control system may be configured to connect a three-phase power supply and a low-voltage load power distribution through a normally closed switch, where the normally closed switch is a different switch component from the normally closed switch in the oil station control system, and is a normally closed switch (not shown in the figure) provided to connect the low-voltage load power distribution and the three-phase power supply.
As an optimized configuration, a backup interface may also be connected to the three-phase power supply. The portable multifunctional electric heating cup is convenient to be simply connected externally when in use.
As shown in fig. 2, the control of one oil pump is taken as an example to describe the oil station control system, one oil pump M is connected to a first normally open contact switch KM12 in the control unit through a thermal relay protection KH, the first normally open contact switch KM12 is connected to three-phase power through a start button QA, the start button QA is manually closed or normally closed, and the control unit controls the first normally open contact switch KM12 to open and close, so that the oil pump M is controlled.
Based on the oil station control system, a ventilator set control system is established, and the ventilator set control system comprises an automatic control system and the oil station electric control system. The automatic control system is connected with the oil station electric control system, the fan, the motor and the oil station, and is used for acquiring real-time working data of the fan, the motor and the oil station, comparing and analyzing the real-time working data with a preset value, and sending a working instruction to the oil station electric control system; meanwhile, the fan, the motor and the oil station are controlled to work by sending a working instruction to the oil station electric control system; and the oil station electric control system is used for receiving the working instruction of the automatic control system and controlling the fan, the motor and the oil station to work according to the working instruction. The whole control of the ventilator unit is completed through an automatic control system and an oil station electric control system, and a set of automatic control system is established based on the oil station electric control system. Have above-mentioned oil station electrical system's all advantages concurrently, compromise the work security and the control convenience of ventilation unit simultaneously.
Fig. 3 shows an embodiment of the ventilator group control system of the present invention, which is used for controlling an oil pump M1, an oil pump M2, an oil station electric heater EH1, and a main electric heater EH2, and controlling opening and closing of KM12 through a control mode of a control unit, and the oil pump M1 and the oil pump M2 are connected to a thermal relay protection KH through a normally closed switch QA, and the control system is further provided with two backup interfaces through two normally closed switches QA, and in practical application, the control system can be used for connecting an electric actuator and a field instrument box.
The specific control method of the control system of the ventilator unit comprises the following steps:
(1) oil station start-up
The automatic control system sends an oil station work instruction to the oil station electric control system, and the time for sending the instruction is determined according to the control requirement, can be manually specified and can also be manually controlled. The oil station electric control system receives an oil station work instruction, a first normally closed switch KM11 and a second normally open switch KM21 corresponding to the oil station are controlled to be closed, at the moment, a relay coil KM1 is electrified, a second normally open contact switch KM13 is controlled to be closed, the oil station starts to work, in the mode, an automatic control system controls the first normally closed switch KM11 and the second normally open switch KM21 to be closed, automatic control is achieved, when the circuit is electrified, a relay coil KM1 is electrified, according to the relay work principle, the second normally open contact switch KM13 is closed, and the corresponding oil station starts to work;
or, the oil station electric control system receives an oil station work instruction, and the first normally open contact switch SK1 and the manual switch SK2 can be manually closed, at the moment, the relay coil KM1 is electrified to control the first normally open contact switch KM12 to be closed, the oil station starts to work, and the mode is manual access operation.
The starting work of the oil station is specifically that only one oil pump in the oil station is started, and in the working process of a subsequent ventilator unit, if the pressure of the oil pump is collected and judged by an automatic control system to be lower than the lower limit of a preset value range and within the preset safety value range, an adjustment prompt is sent, and other oil pumps are started to work simultaneously. The economical efficiency of operation has both been guaranteed, has also guaranteed operation safety and stability, has realized the automated control of oil pump in the oil station simultaneously with automizing, and the opening of another oil pump is stopped and is realized through the control unit too. The overall operation management and control of the system are more convenient.
(2) Preparation and starting of fan before operation
The automatic control system collects and judges that the opening of an inlet valve of the fan is less than 15%, the emptying valve is fully opened, the check valve is fully closed, and the automatic control system collects and judges that the pipeline pressure between the oil station and the fan and the pipeline pressure between the oil station and the motor meet preset values; the automatic control system collects and judges that the temperature and the liquid level of an oil tank of the oil station accord with preset values; in addition, the test switch is reset self-checking, and the memory is reset. When the conditions are met, the condition indicates that the ventilator unit is in a good state and can be ready to be started, the automatic control system sends a starting prompt, and an operator starts the power supply of the motor to work after receiving the prompt;
the motor is started through the control unit, specifically, a first normally closed switch KM11 and a second normally open switch KM21 corresponding to the motor set are closed, at the moment, a relay coil KM1 is electrified to control the second normally open contact switch KM13 to be closed, and the motor starts to work;
or the oil station electric control system receives an oil station work instruction, the first normally open contact switch SK1 and the manual switch SK2 are manually closed, at the moment, the relay coil KM1 is electrified, the first normally open contact switch KM12 is controlled to be closed, and the motor starts to work;
after the motor starts to work, the fan normally operates, and in the running process of the fan, the running state of the fan set is monitored in real time by the fan set control system:
in the working process of the ventilator unit, the automatic control system acquires the running data of the fan, the oil station and the motor in real time, and if the running data deviates from a preset value range and is within a preset safety value range, the automatic control system sends out an adjustment prompt; if the safety value exceeds the preset safety value range, a stop instruction is sent to the oil station electric control system, the oil station electric control system controls the fan, the oil station and the relay coil KM1 corresponding to the motor to be disconnected, the ventilation unit stops running, and meanwhile, the automatic control system sends an alarm prompt.
The above-mentioned operational data include, but are not limited to: fan bearing temperature, fan bearing vibration, fan shaft displacement, speed increaser bearing bush temperature, motor bearing, motor stator temperature, lubricating oil station outlet pressure, lubricating oil filter pressure difference, lubricating oil tank temperature, lubricating oil tank liquid level and the like. The operation safety of the ventilator unit is effectively guaranteed.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An oil station electrical system which characterized in that:
the system comprises a plurality of control units and a plurality of controlled objects which are in one-to-one correspondence with the control units; the control units are integrated in the same electrical control cabinet;
the control unit comprises a change-over switch SA, a first control module, a second control module and a relay module; the relay module comprises a relay coil KM1, a first normally open contact switch KM12 and a second normally open contact switch KM 13;
two input ends of the change-over switch SA are connected with a three-phase power supply, two output ends of the change-over switch SA are respectively connected with the first control module and the second control module correspondingly, and the first control module/the second control module is switched to be connected with the three-phase power supply through the change-over switch SA; the first control module and the second control module are connected in parallel and then connected in series with the relay coil;
the first control module comprises a normally closed manual switch SK1 and a manual switch SK2 which are connected in series, and the first normally open contact switch KM12 is connected with the manual switch SK2 in parallel; the manual switch SK2 is used for being manually closed when needing to be started, and the normally closed manual switch SK1 is used for being manually opened when needing to be stopped;
the second control module comprises a first normally closed switch KM11 and a second normally open switch KM21 which are connected in series and acts according to an oil station work instruction sent by an upper computer; the second normally-open contact switch KM13 is connected in parallel with the second normally-open switch KM 21; the second normally open switch KM21 is used for being controlled to be closed when the vehicle needs to be started, and the first normally closed switch KM11 is used for being controlled to be opened when the vehicle needs to be stopped;
the first normally open contact switch KM12 and the second normally open contact switch KM13 are respectively connected to a power supply loop of a controlled object; the plurality of controlled objects are divided into a first object group, a second object group and a third object group;
the controlled object of the first object group comprises a motor group and an oil station;
the controlled objects of the second object group comprise main motor heaters and/or cooling fans;
the controlled object of the third object group comprises an oil pump and/or an oil tank heater.
2. The oil station electric control system according to claim 1, characterized in that: the system also comprises low-voltage load power distribution connected with a three-phase power supply through a normally closed switch.
3. An oil station electrical control system as defined in claim 2, wherein: the system also comprises a standby interface connected with the three-phase power supply.
4. An oil station electrical control system as defined in claim 3, wherein: and a thermal relay protection K2 is connected between the oil pump of the third object group and the corresponding first normally-open contact switch KM12 or second normally-open contact switch KM 13.
5. A ventilator unit control system characterized in that: the oil station control system comprises an automatic control system and an oil station control system according to any one of claims 1 to 4;
the automatic control system is connected with the oil station electric control system, the fan, the motor and the oil station, and is used for acquiring real-time working data of the fan, the motor and the oil station, comparing and analyzing the real-time working data with a preset value, and sending a working instruction to the oil station electric control system; meanwhile, the fan, the motor and the oil station are controlled to work by sending a working instruction to the oil station electric control system;
and the oil station electric control system is used for receiving the working instruction of the automatic control system and controlling the fan, the motor and the oil station to work according to the working instruction.
6. A control method using a control system for a ventilation unit according to claim 5, comprising the steps of:
s1, starting the oil station
S1.1, the automatic control system sends an oil station work instruction to an oil station electric control system;
s1.2, an oil station electric control system receives an oil station work instruction, and controls a first normally closed switch KM11 and a second normally open switch KM21 corresponding to an oil station to be closed, at the moment, a relay coil KM1 is electrified to control a second normally open contact switch KM13 to be closed, and the oil station starts to work;
or the oil station electric control system receives an oil station work instruction, the first normally open contact switch SK1 and the manual switch SK2 are manually closed, at the moment, the relay coil KM1 is electrified, the first normally open contact switch KM12 is controlled to be closed, and the oil station starts to work;
s2, preparing and starting the running of the fan
S2.1, the automatic control system collects and judges whether the opening of an inlet valve of the fan meets a preset value, whether an emptying valve is fully opened and whether a check valve is fully closed;
s2.2, the automatic control system collects and judges that the pipeline pressure between the oil station and the fan and the pipeline pressure between the oil station and the motor accord with a preset value;
s2.3, the automatic control system collects and judges that the temperature and the liquid level of an oil tank of the oil station accord with preset values;
s2.4, if the automatic control system collects and judges that all items from the step S2.1 to the step S2.3 are yes, sending a starting prompt, and starting a motor power supply to work after receiving the prompt by an operator;
s2.5, closing a first normally closed switch KM11 and a second normally open switch KM21 corresponding to the motor group, wherein at the moment, a relay coil KM1 is electrified to control the second normally open contact switch KM13 to be closed, and starting the motor to work;
or the oil station electric control system receives an oil station work instruction, the first normally open contact switch SK1 and the manual switch SK2 are manually closed, at the moment, the relay coil KM1 is electrified, the first normally open contact switch KM12 is controlled to be closed, and the motor starts to work;
s3, control of operation
In the working process of the ventilator unit, the automatic control system acquires the running data of the fan, the oil station and the motor in real time, and if the running data deviates from a preset value range and is within a preset safety value range, the automatic control system sends out an adjustment prompt; if the safety value exceeds the preset safety value range, a stop instruction is sent to the oil station electric control system, the oil station electric control system controls the fan, the oil station and the relay coil KM1 corresponding to the motor to be disconnected, the ventilation unit stops running, and meanwhile, the automatic control system sends an alarm prompt.
7. The control method according to claim 6, characterized in that: in step S1.2, the oil station start operation is specifically that only one oil pump in the oil station starts, and in step S3, if the pressure of the oil pump is lower than the lower limit of the preset value range and within the preset safety value range, which is acquired and determined by the automatic control system, an adjustment prompt is sent, and other oil pumps are started to operate simultaneously.
8. The control method according to claim 7, characterized in that: the automatic control system sends a standby oil pump starting instruction to the oil station electric control system, the oil station electric control system receives the standby oil pump starting instruction and controls a first normally closed switch KM11 and a second normally open switch KM21 corresponding to the oil pumps to be closed, at the moment, a relay coil KM1 is electrified and controls a second normally open contact switch KM13 to be closed, and the oil pumps start to work;
or the oil station electric control system receives a command of starting the backup oil pump, manually closes the first normally open contact switch SK1 and the manual switch SK2, at the moment, the relay coil KM1 is electrified, controls the first normally open contact switch KM12 to be closed, and the oil pump starts to work.
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| CN202010073993.0A CN111271303B (en) | 2020-01-22 | 2020-01-22 | Oil station electric control system, ventilator unit control system and control method |
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| CN202010073993.0A CN111271303B (en) | 2020-01-22 | 2020-01-22 | Oil station electric control system, ventilator unit control system and control method |
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| CN111271303A (en) | 2020-06-12 |
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