CN220353936U - Engine medium control system - Google Patents
Engine medium control system Download PDFInfo
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- CN220353936U CN220353936U CN202322225259.3U CN202322225259U CN220353936U CN 220353936 U CN220353936 U CN 220353936U CN 202322225259 U CN202322225259 U CN 202322225259U CN 220353936 U CN220353936 U CN 220353936U
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- engine
- variable frequency
- control unit
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- 239000007788 liquid Substances 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 5
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses an engine medium control system, which belongs to the technical field of engine systems, and comprises an engine, a medium circulation pipeline connected to the outside of the engine, a heat exchanger, a variable frequency pump, an outlet temperature sensor, an inlet temperature sensor, a medium circulation pipeline, a variable frequency pump, a medium temperature sensor and a medium temperature sensor, wherein the two ends of the medium circulation pipeline are connected to a liquid outlet and a liquid inlet of the engine; the control unit controls the rotating speed of the variable frequency pump according to the temperature set value and the actual value fed back by the outlet temperature sensor and/or the inlet temperature sensor, and realizes the control of temperature by directly adjusting the flow of the medium passing through the heat exchanger, so that the control unit has the advantages of high response speed, accurate temperature control and strong universality.
Description
Technical Field
The utility model belongs to the technical field of engine systems, and particularly relates to an engine medium control system.
Background
The flow, temperature and pressure of engine system media (cooling water, fuel oil, and lubricant, etc.) are major factors affecting engine operating conditions. Conventional medium temperature control is shown in fig. 1, a temperature control valve 5 and a heat exchanger 3 are installed in the system, the water quantity passing through the heat exchanger 3 is regulated through the temperature control valve 5, the temperature of the system of the engine 1 is controlled, and a water pump 6 and a pressure regulating valve 4 with proper pressure are installed in the system, so that the pressure and flow of the system are controlled. Because the water pump 6 and the pressure regulating valve 4 determine the pressure during design and factory debugging, the pressure and the flow are not adjustable and controllable, the temperature regulation response speed is low, the precision is low, the pressure and the flow cannot be accurately controlled, and the partial load running condition of the engine is not ideal.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the medium control system of the engine is capable of adjusting the medium temperature by adjusting the medium flow flowing through the heat exchanger, and is high in response speed, accurate in control and high in universality.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the medium control system of the engine comprises the engine and a medium circulation pipeline connected to the outside of the engine, wherein a heat exchanger is arranged on the medium circulation pipeline, two ends of the medium circulation pipeline are connected to a liquid outlet and a liquid inlet of the engine, the medium control system further comprises a variable frequency pump for adjusting medium flow, an outlet temperature sensor and an inlet temperature sensor for detecting medium temperature, the outlet temperature sensor is arranged on the medium circulation pipeline between the liquid outlet and the heat exchanger, and the inlet temperature sensor is arranged on the medium circulation pipeline between the heat exchanger and the liquid inlet; the outlet temperature sensor, the inlet temperature sensor and the variable frequency pump are respectively and electrically connected to a control unit, and the control unit controls the rotating speed of the variable frequency pump according to a temperature set value and an actual value fed back by the outlet temperature sensor and/or the inlet temperature sensor.
Further, the variable frequency pump further comprises a flow sensor for detecting the flow of the medium, the flow sensor is electrically connected with the control unit, and the control unit controls the rotating speed of the variable frequency pump according to the flow set value and the actual value fed back by the flow sensor.
Further, the variable frequency pump is arranged on the medium circulation pipeline between the heat exchanger and the liquid inlet, and the flow sensor is arranged on the medium circulation pipeline between the variable frequency pump and the liquid inlet.
Further, the variable frequency pump comprises a pump body and a variable frequency motor, a rotating shaft of the pump body is in transmission connection with a rotating shaft of the variable frequency motor, and the control unit is electrically connected with the variable frequency motor.
Further, the device also comprises a pressure sensor for detecting the pressure of the medium and an electric control regulating valve for regulating the pressure of the medium, wherein the pressure sensor and the electric control regulating valve are respectively and electrically connected with the control unit, and the control unit controls the opening of the electric control regulating valve according to the pressure set value and the actual value fed back by the pressure sensor.
Further, the electric control regulating valve is arranged on the medium circulation pipeline between the liquid outlet and the heat exchanger.
Further, the pressure sensor comprises an outlet pressure sensor, and the outlet pressure sensor is arranged on the medium circulation pipeline between the liquid outlet and the electric control regulating valve.
Further, the pressure sensor further comprises an inlet pressure sensor, and the inlet pressure sensor is arranged on the medium circulation pipeline between the variable frequency pump and the liquid inlet.
Further, the electric control regulating valve is a hydraulic valve or an electric valve.
Further, the medium is cooling water, fuel oil or lubricating oil.
After the technical scheme is adopted, the utility model has the beneficial effects that:
the engine medium control system comprises an engine and a medium circulation pipeline connected to the outside of the engine, wherein the medium circulation pipeline is provided with a heat exchanger, two ends of the medium circulation pipeline are connected with a liquid outlet and a liquid inlet of the engine, and the engine medium control system further comprises a variable frequency pump for adjusting medium flow, an outlet temperature sensor and an inlet temperature sensor for detecting medium temperature, wherein the outlet temperature sensor is arranged on the medium circulation pipeline between the liquid outlet and the heat exchanger, and the inlet temperature sensor is arranged on the medium circulation pipeline between the heat exchanger and the liquid inlet; the outlet temperature sensor, the inlet temperature sensor and the variable frequency pump are respectively and electrically connected to the control unit, the control unit controls the rotating speed of the variable frequency pump according to the temperature set value and the actual value fed back by the outlet temperature sensor and/or the inlet temperature sensor, the temperature control is realized by directly adjusting the medium flow through the heat exchanger, the variable frequency pump can be started to raise the temperature or lower the temperature only when the medium temperature exceeds the set range, the response speed is high, the temperature control is accurate through the cooperation of the outlet temperature sensor and the inlet temperature sensor, and the variable frequency pump is applicable to the medium of which the liquid outlet temperature or the liquid inlet temperature of the engine needs to be adjusted, and the variable frequency pump is high in universality.
Drawings
FIG. 1 is a schematic diagram of a prior art engine medium control system;
FIG. 2 is a schematic diagram of the engine medium control system of the present utility model;
FIG. 3 is a control schematic of the engine medium control system of the present utility model;
FIG. 4 is a schematic temperature control diagram of the engine medium control system of the present utility model;
FIG. 5 is a flow control schematic of the engine medium control system of the present utility model;
FIG. 6 is a pressure control schematic diagram of the engine medium control system of the present utility model;
in the figure, a 1-engine, a 2-medium circulation pipeline, a 3-heat exchanger, a 4-pressure regulating valve, a 5-temperature control valve, a 6-water pump, a 7-outlet temperature sensor, an 8-outlet pressure sensor, a 9-electric control regulating valve, a 10-variable frequency pump, an 11-flow sensor, a 12-inlet temperature sensor, a 13-inlet pressure sensor and a 14-control unit are arranged.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
The orientations referred to in the present specification are all shown in the drawings, and represent only relative positional relationships, and do not represent absolute positional relationships.
As shown in fig. 2, the medium control system of the engine comprises an engine 1 and a medium circulation pipeline 2 connected to the outside of the engine 1, wherein a heat exchanger 3 is arranged on the medium circulation pipeline 2, the medium is one of cooling water, fuel oil or lubricating oil, and two ends of the medium circulation pipeline 2 are connected to a liquid outlet and a liquid inlet of corresponding medium on the engine 1.
As shown in fig. 2, the control unit 14 further includes a variable frequency pump 10 for adjusting the flow rate of the medium, an outlet temperature sensor 7 for detecting the temperature of the medium, and an inlet temperature sensor 12, wherein the outlet temperature sensor 7 is disposed on the medium circulation line 2 between the liquid outlet and the heat exchanger 3, and the inlet temperature sensor 12 is disposed on the medium circulation line 2 between the heat exchanger 3 and the liquid inlet.
As shown in fig. 2 and 4 together, the outlet temperature sensor 7, the inlet temperature sensor 12 and the variable frequency pump 10 are electrically connected to the control unit 14, respectively, and the control unit 14 controls the rotation speed of the variable frequency pump 10 according to the temperature set value and the actual value fed back by the outlet temperature sensor 7 and/or the inlet temperature sensor 12. The temperature set point is the corresponding temperature required by the control unit 14 to determine the medium of the engine 1 based on the load on the engine 1 and related operating parameters.
Specifically, since the medium detected by the outlet temperature sensor 7 is always in a communication state with the liquid outlet of the engine 1, the detected medium temperature is basically consistent with the medium temperature inside the engine 1, so that the control unit 14 starts the variable frequency pump 10 only when the detected medium temperature exceeds the set range, and the system medium is heated or cooled.
Further, for the adjustment of the medium flow, the control unit 14 can control the rotation speed of the variable frequency pump 10 only according to the value fed back by the outlet temperature sensor 7 or the inlet temperature sensor 12, and the variable frequency pump is applicable to the medium which needs to be adjusted for the outlet temperature or the inlet temperature of the engine 1, and has strong universality.
Specifically, the control unit 14 may adjust the rotation speed of the variable frequency pump 10 only according to the value fed back by the inlet temperature sensor 12 until the temperature of the liquid inlet of the engine 1 reaches the set range, and maintain the current rotation speed of the variable frequency pump 10.
The control unit 14 can adjust the rotation speed of the variable frequency pump 10 only according to the value fed back by the outlet temperature sensor 7 until the temperature of the liquid outlet of the engine 1 reaches the set range, and maintain the current rotation speed of the variable frequency pump 10.
Further, when the variable frequency pump 10 is turned on, the control unit 14 may also adjust the rotation speed of the variable frequency pump 10 according to the cooperation of the outlet temperature sensor 7 and the inlet temperature sensor 12. Specifically, the control unit 14 primarily adjusts the rotation speed of the variable frequency pump 10 according to the temperature value detected by the outlet temperature sensor 7, and after heat exchange, the inlet temperature sensor 12 detects the temperature of the flowing medium again, if the temperature value is detected to be not in accordance with the set value, the control unit 14 further adjusts the rotation speed of the variable frequency pump 10. Through the cooperation of the outlet temperature sensor 7 and the inlet temperature sensor 12, the temperature response speed is high, and the control is accurate.
As shown in fig. 2 and 5 together, the control unit 14 further includes a flow sensor 11 for detecting the flow rate of the medium, the flow sensor 11 is electrically connected to the control unit 14, and the control unit 14 controls the rotation speed of the variable frequency pump 10 according to the flow rate set value and the actual value fed back by the flow sensor 11. After the system is used for many times, the control unit 14 counts the rotation speed of the variable frequency pump 10 under each working condition to calibrate, when the variable frequency pump 10 is started, the control unit 14 takes the required rotation speed of the variable frequency pump 10 as a set value, and adjusts the rotation speed of the variable frequency pump 10 according to the actual value fed back by the flow sensor 11, so that the medium flow reaches the corresponding value.
The variable frequency pump 10 is disposed on the medium circulation pipeline 2 between the heat exchanger 3 and the liquid inlet of the engine 1, and the flow sensor 11 is disposed on the medium circulation pipeline 2 between the variable frequency pump 10 and the liquid inlet, that is, the system medium is firstly heated or cooled by heat exchange of the heat exchanger, and then the system flow is regulated by the variable frequency pump 10, and the flow sensor 11 detects the system flow which enters the engine 1 after the variable frequency pump 10 regulates. The variable frequency pump 10 comprises a pump body and a variable frequency motor, a rotating shaft of the pump body is in transmission connection with a rotating shaft of the variable frequency motor, the control unit 14 is electrically connected to the variable frequency motor, and the control unit 14 controls the rotating speed of the variable frequency pump 10 by controlling the rotating speed of the variable frequency motor.
As shown in fig. 2, since the flow rate of the medium is inversely proportional to the pressure, the larger the flow rate is and the smaller the pressure is without adjusting other parameters of the system, the medium pressure of the system needs to be adjusted when the flow rate is adjusted, so that the influence of the medium pressure exceeding the set value on the operation of the engine 1 is avoided. The control unit 14 further comprises a pressure sensor for detecting the pressure of the medium and an electrically controlled regulating valve 9 for regulating the pressure of the medium, wherein the electrically controlled regulating valve 9 is a hydraulic valve or an electric valve.
As shown in fig. 2 and 6 together, the pressure sensor and the electronically controlled regulator valve 9 are respectively electrically connected to a control unit 14, and the control unit 14 controls the opening of the electronically controlled regulator valve 9 according to the pressure set value and the actual value fed back by the pressure sensor. The pressure is controlled by adjusting the opening degree of the electric control regulating valve 9, so that the pressure is relatively independent, and the medium flow of the system is not greatly influenced. The pressure set point is the corresponding pressure required by the control unit 14 to determine the medium of the engine 1 based on the load on the engine 1 and related operating parameters.
As shown in fig. 2, an electronically controlled regulating valve 9 is provided on the medium circulation line 2 between the liquid outlet of the engine 1 and the heat exchanger 3. The pressure sensor comprises an outlet pressure sensor 8, and the outlet pressure sensor 8 is arranged on the medium circulation pipeline 2 between the electric control regulating valve 9 and the liquid outlet. The pressure sensor also comprises an inlet pressure sensor 13, and the inlet pressure sensor 13 is arranged on the medium circulation pipeline 2 between the variable frequency pump 10 and the liquid inlet of the engine 1.
Further, the control unit 14 adjusts the opening degree of the electronically controlled regulator valve 9 according to the outlet pressure sensor 8 and the inlet pressure sensor 13. Specifically, the control unit 14 performs preliminary adjustment on the opening of the electric control adjusting valve 9 according to the pressure value detected by the outlet pressure sensor 8, after heat exchange, the inlet pressure sensor 13 detects the pressure of the flowing medium again, if it is detected that the pressure value does not conform to the set value, the control unit 14 further adjusts the opening of the electric control adjusting valve 9 until the liquid inlet pressure and the liquid outlet pressure of the engine 1 reach the set range, and the current opening of the electric control adjusting valve 9 is maintained.
As shown in fig. 3, the control unit 14 determines the corresponding temperature, pressure and flow rate required by the medium of the engine 1 according to the load of the engine 1 and the related operation parameters, takes the required temperature, pressure and flow rate as set values, controls the rotation speed of the variable frequency pump 10 and the opening of the electric control regulating valve 9 according to the actual values detected by the corresponding sensors to control the temperature, flow rate and pressure of the system medium simultaneously, thereby meeting the use requirement of the engine 1 and enabling the engine 1 to always operate under ideal conditions.
The engine medium control system can be used for circulating cooling water, fuel oil or lubricating oil as a medium, and the control unit monitors temperature, flow and pressure data of the system through the temperature sensor, the flow sensor and the pressure sensor to control an electric control regulating valve and a variable frequency pump arranged on an external circulation pipeline in real time, so that the temperature, the flow and the pressure are controlled simultaneously, the use requirement of an engine is met, the accuracy is high, the response speed is high, and the universality is strong.
While the foregoing describes specific embodiments of the present utility model, those skilled in the art will appreciate that the described embodiments are merely a partial, rather than an entire, embodiment of the present utility model, and that the scope of the present utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, without departing from the spirit and scope of the utility model.
Claims (10)
1. The medium control system of the engine comprises the engine and a medium circulation pipeline connected to the outside of the engine, wherein a heat exchanger is arranged on the medium circulation pipeline, and two ends of the medium circulation pipeline are connected to a liquid outlet and a liquid inlet of the engine; the outlet temperature sensor, the inlet temperature sensor and the variable frequency pump are respectively and electrically connected to a control unit, and the control unit controls the rotating speed of the variable frequency pump according to a temperature set value and an actual value fed back by the outlet temperature sensor and/or the inlet temperature sensor.
2. The engine medium control system of claim 1, further comprising a flow sensor for detecting a flow of medium, the flow sensor being electrically connected to the control unit, the control unit controlling a rotational speed of the variable frequency pump based on a flow set point and an actual value fed back by the flow sensor.
3. The engine medium control system of claim 2, wherein the variable frequency pump is disposed on the medium circulation line between the heat exchanger and the liquid inlet, and the flow sensor is disposed on the medium circulation line between the variable frequency pump and the liquid inlet.
4. The engine medium control system of claim 1, wherein the variable frequency pump comprises a pump body and a variable frequency motor, a rotating shaft of the pump body is in transmission connection with a rotating shaft of the variable frequency motor, and the control unit is electrically connected to the variable frequency motor.
5. The engine medium control system according to claim 1, further comprising a pressure sensor for detecting a medium pressure and an electronically controlled regulator valve for regulating the medium pressure, the pressure sensor and the electronically controlled regulator valve being electrically connected to the control unit, respectively, the control unit controlling an opening degree of the electronically controlled regulator valve in accordance with a pressure set value and an actual value fed back by the pressure sensor.
6. The engine medium control system of claim 5, wherein the electronically controlled regulator valve is disposed on the medium circulation line between the liquid outlet and the heat exchanger.
7. The engine medium control system of claim 6, wherein the pressure sensor comprises an outlet pressure sensor disposed on the medium circulation line between the outlet and the electronically controlled regulator valve.
8. The engine medium control system of claim 7, wherein the pressure sensor further comprises an inlet pressure sensor disposed on the medium circulation line between the variable frequency pump and the liquid inlet.
9. The engine medium control system of claim 5, wherein the electronically controlled regulator valve is a hydraulic valve or an electric valve.
10. The engine medium control system according to any one of claims 1 to 9, characterized in that the medium is cooling water, fuel oil or lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322225259.3U CN220353936U (en) | 2023-08-18 | 2023-08-18 | Engine medium control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322225259.3U CN220353936U (en) | 2023-08-18 | 2023-08-18 | Engine medium control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220353936U true CN220353936U (en) | 2024-01-16 |
Family
ID=89476904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322225259.3U Active CN220353936U (en) | 2023-08-18 | 2023-08-18 | Engine medium control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220353936U (en) |
-
2023
- 2023-08-18 CN CN202322225259.3U patent/CN220353936U/en active Active
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