CN112727587B - Coolant liquid temperature control system - Google Patents
Coolant liquid temperature control system Download PDFInfo
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- CN112727587B CN112727587B CN201911031994.2A CN201911031994A CN112727587B CN 112727587 B CN112727587 B CN 112727587B CN 201911031994 A CN201911031994 A CN 201911031994A CN 112727587 B CN112727587 B CN 112727587B
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- cooling liquid
- temperature control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
Abstract
The invention relates to the technical field of engine performance tests, and provides a cooling liquid temperature control system which is used in an engine test experiment. The cooling liquid temperature control system provided by the invention is provided with two cooling liquid circulating systems which are arranged in parallel, and the second cooling liquid circulating system is also connected with at least two heat exchangers in parallel, so that the heat exchange range of the whole cooling liquid circulating system is widened, the utilization rate of the heat exchangers can be controlled by adjusting the proportional valve, and the temperature control precision is ensured.
Description
Technical Field
The invention relates to the technical field of engine performance testing, in particular to a cooling liquid temperature control system.
Background
In the engine test process, the test control is often required to simulate the whole vehicle condition and various complex test conditions. In an engine test, the control accuracy of the circulating water of the engine directly relates to whether the engine can be normally tested and operated. Therefore, there is a clear demand for temperature control of the coolant during the engine test. Engine tests require testing of engines of different displacement and power, and the heat exchange capacity requirements for the coolant are very different. The existing cooling liquid temperature control system equipment has a good temperature control effect within a certain heat exchange quantity range, but the accuracy cannot be controlled if the temperature exceeds the heat exchange quantity range.
The existing cooling liquid temperature control system used for engine test is difficult to be compatible with engines with different heat exchange quantity requirements for use, and the engines with different heat exchange quantity requirements can not be ensured to have accurate control precision when tested in the same set of cooling liquid temperature control system. In order to enable the coolant temperature control system to obtain better control precision within a wider heat exchange amount range and achieve better control effect, a more advanced controller is designed in the coolant temperature control system, and the control method and strategy are improved. For example, a valve port is arranged on a coolant temperature control system, and the flow of cooling water entering the heat exchanger is adjusted through the valve port so as to achieve the purpose of changing the heat exchange amount of the heat exchanger. However, the position of the valve port in the whole cooling liquid temperature control system, which enters the heat exchanger, is not well measured and recorded, so that an operator with rich experience is required to adjust the valve port to achieve a good control effect. When different personnel operate the valve port aperture and adjust, the coolant liquid heat transfer effect of system differs great, can't guarantee the uniformity of experimental effect.
Disclosure of Invention
The invention aims to solve the problem that a cooling liquid temperature control system used for engine test is difficult to be compatible with engines with different heat exchange quantity requirements for use, so that the control precision cannot be guaranteed, and provides the cooling liquid temperature control system.
The technical scheme adopted by the invention for solving the technical problems is as follows: a cooling liquid temperature control system is used in an engine test experiment, a liquid outlet pipe and a liquid inlet pipe which can be used for the inlet and outlet of cooling liquid are arranged on an engine, the cooling liquid temperature control system comprises a pipeline pump connected on the liquid outlet pipe, an expansion water tank for supplying the cooling liquid, a proportional valve connected on the liquid inlet pipe and a cooling liquid circulating system arranged between the pipeline pump and the proportional valve, the cooling liquid circulating system comprises a first cooling liquid circulating system and a second cooling liquid circulating system which are arranged in parallel, the first coolant circulation system is a first coolant pipe disposed between the pipe pump and the proportional valve, the second cooling liquid circulation system comprises a first pipeline communicated with the pipeline pump and a second pipeline communicated with the proportional valve, at least two heat exchangers connected in parallel between the first pipeline and the second pipeline and an external cooling water circulation system connected in series on the two heat exchangers.
Further, the coolant temperature control system further comprises a heating cylinder which is arranged between the pipeline pump and the coolant circulating system and can be used for heating the temperature of the coolant.
Specifically, the heating cylinder including hold the barrel of coolant liquid, set up in heating pipe and temperature sensor on the barrel, the top of barrel is provided with and supplies the heating pipe inserts the inside opening of barrel, in be provided with the cover in the barrel and locate the outside liquid ring that keeps off of heating pipe, the liquid ring that keeps off includes by the inner wall orientation of barrel first liquid ring that keeps off that the center of barrel extends and by first liquid ring orientation the second liquid ring that the opening part extends, the side of barrel is provided with and is located the top liquid outlet of first liquid ring and is located inlet and the temperature sensor installing port of the below of first liquid ring that keeps off.
Further, the second cooling liquid circulation system further comprises a first control switch arranged between the heat exchanger and the first pipeline.
Specifically, the second cooling liquid circulation system comprises a first heat exchanger and a second heat exchanger which are arranged in parallel, the first heat exchanger is communicated with the first pipeline, and the first control switch is arranged between the second heat exchanger and the first pipeline.
Furthermore, the second cooling liquid circulation system also comprises a water discharge pipe connected in parallel with the second pipeline and a water discharge control switch arranged on the water discharge pipe.
Furthermore, the cooling liquid temperature control system also comprises an external cooling liquid circulating system for adjusting the flow and the pressure in the pipeline of the cooling liquid temperature control system, and the external cooling liquid circulating system comprises an external cooling liquid circulating pipeline connected between the liquid outlet pipe and the liquid inlet pipe and a second control switch arranged on the external cooling liquid circulating pipeline.
Further, the cooling liquid temperature control system further comprises a monitoring device, wherein the monitoring device comprises a temperature monitoring device, a pressure monitoring device and a third control switch, the temperature monitoring device, the pressure monitoring device and the third control switch are arranged on the liquid outlet pipe and the liquid inlet pipe.
Furthermore, the cooling liquid temperature control system further comprises a supply device capable of supplying cooling liquid into the expansion water tank, wherein the supply device comprises a low-level water tank, a liquid supply pipeline connecting the low-level water tank and the expansion water tank, a liquid supply pump arranged on the liquid supply pipeline and a filter.
Further, the cooling liquid temperature control system further comprises an exhaust device, wherein the exhaust device comprises a first exhaust pipe, a second exhaust pipe and a third exhaust pipe, the first exhaust pipe is arranged on the expansion water tank and used for communicating the expansion water tank with the outside, the second exhaust pipe is communicated between the engine and the expansion water tank, and the third exhaust pipe is communicated between the cooling liquid circulating system and the expansion water tank.
The cooling liquid temperature control system provided by the invention has the beneficial effects that: the first cooling liquid circulating system and the second cooling liquid circulating system which are arranged in parallel are arranged in the cooling liquid temperature control system, at least two heat exchangers are connected in parallel in the second cooling liquid circulating system, the heat exchange range of the whole cooling liquid circulating system is widened, the flow of cooling liquid in the two independent cooling liquid circulating systems is finally controlled by a proportional valve, the proportion of the heat exchangers which are actually connected into the cooling liquid temperature control system can be adjusted according to the requirements of the heat exchange quantity of different engines, the heat exchange range of the system is improved on the premise that the temperature controller is not changed, the utilization rate of the heat exchangers can be controlled by adjusting the proportional valve, and the temperature control precision is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the operation of a coolant temperature control system according to the present invention;
FIG. 2 is an elevation view of a coolant temperature control system provided by the present invention;
FIG. 3 is a side view of a coolant temperature control system provided by the present invention;
FIG. 4 is a schematic perspective view of a coolant temperature control system according to the present invention;
fig. 5 is a full sectional view of a heating cylinder in a coolant temperature control system according to the present invention.
In the figure: 100-coolant temperature control system, 10-engine, 11-liquid outlet pipe, 12-liquid inlet pipe, 20-pipeline pump, 21-filter, 30-expansion water tank, 31-supply device, 311-low level water tank, 3111-liquid supplement port, 3112-water discharge port, 312-liquid supplement pipeline, 313-liquid supplement pump, 314-filter, 40-proportional valve, 50-coolant circulation system, 51-first coolant circulation system, 52-second coolant circulation system, 521-first pipeline, 522-second pipeline, 523-heat exchanger, 5231-first heat exchanger, 5232-second heat exchanger, 524-external coolant circulation system, 525-first control switch, 526-water discharge pipe, 527-water discharge control switch, 60-a heating cylinder, 61-a cylinder body, 611-an opening, 612-a liquid blocking ring, 6121-a first liquid blocking ring, 6122-a second liquid blocking ring, 613-a liquid outlet, 614-a liquid inlet, 615-a temperature sensor mounting port, 62-a heating pipe, 63-a temperature sensor, 70-an external cooling liquid circulating system, 71-an external cooling liquid circulating pipeline, 72-a second control switch, 80-a monitoring device, 81-a temperature monitoring device, 82-a pressure monitoring device, 83-a third control switch, 90-an exhaust device, 91-a first exhaust pipe, 92-a second exhaust pipe and 93-a third exhaust pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1-2, a coolant temperature control system 100 provided by the present invention is used in a test experiment of an engine 10, and the coolant temperature control system 100 can meet the test requirements of the engine and control the temperature of coolant at the outlet of the engine 10. Specifically, as shown in fig. 1, an engine 10 for testing use is provided with a liquid outlet pipe 11 and a liquid inlet pipe 12 for allowing a coolant to enter and exit, and the coolant is provided inside the engine 10 and may be water or other liquid with a cooling effect. The invention provides a cooling liquid temperature control system 100, which comprises a pipeline pump 20 connected to a liquid outlet pipe 11, an expansion water tank 30 for supplying cooling liquid, a proportional valve 40 connected to a liquid inlet pipe 12 and a cooling liquid circulating system 50 arranged between the pipeline pump 20 and the proportional valve 40. In the coolant temperature control system 100, coolant inside the engine 10 is pumped out by the pipe pump 20, enters the coolant circulation system 50 through the expansion tank 30 for circulation, and then is delivered to the liquid inlet pipe 12 of the engine 10 by the proportional valve 40 so as to flow into the engine 10, thereby completing the whole coolant circulation process. The pipe pump 20 is used for providing a driving force for the whole circulation system, so that the whole cooling fluid temperature control system 100 has enough liquid driving force to complete the circulation process, and the head and the flow rate of the pipe pump 20 determine the pressure and the flow rate of the cooling fluid in all the pipes in the whole cooling fluid temperature control system 100. Also, as shown in fig. 1, a filter 21 is further provided at the front end of the pipe pump 20, and impurities in the pipe in the entire system 100 can be effectively filtered by the filter 21.
Further, the expansion tank 30 disposed in the coolant temperature control system 100 is used for providing enough coolant for the system 100 when the coolant in the system 100 is insufficient, so that sufficient coolant can be circulated in the coolant temperature control circulation system 100 at all times. The expansion tank 30 is provided with a liquid level sensor and a liquid level meter, and when the liquid level on the liquid level meter is lower than the lowest value, the expansion tank 30 needs to be supplemented with cooling liquid to meet the normal operation of the whole cooling liquid temperature control circulation system 100. The proportional valve 40 at the front end of the liquid inlet pipe 12 of the engine 10 can adjust the liquid outlet ratio among the various passages in the cooling liquid circulation system 50 by adjusting the opening degree of the inlet, thereby achieving the purpose of adjusting the temperature in the pipes in the whole system 100. The response speed and accuracy of the proportional valve 40 are related to the temperature control response speed and accuracy of the entire coolant temperature control system 100. Therefore, the arrangement of the proportional valve 40 can control the utilization rate of the heat exchanger in the cooling liquid circulation system 50, and can effectively control the heat exchange precision of the cooling liquid circulation system 50.
Further, as shown in fig. 1, in a coolant temperature control system 100 provided by the present invention, a coolant circulation system 50 between a pipe pump 20 and a proportional valve 40 includes a first coolant circulation system 51 and a second coolant circulation system 50 disposed in parallel with each other, the first coolant circulation system 51 directly communicates the pipe pump 20 and the proportional valve 40, and during a test of the engine 10, if necessary, the proportional valve 40 can control the closing of the first coolant circulation system 51 or the closing of the second coolant circulation system 52, so as to select a desired path to complete the circulation of the coolant. Of course, the proportional valve 40 can also precisely control the flow rates of the liquid flowing into the liquid inlet pipe 12 in the two different paths of the first cooling liquid circulation system 51 and the second cooling liquid circulation system 52, so as to achieve the effect of adjusting the usage rate of the cooling liquid circulation system 50 by adjusting the proportional valve 40. The heat exchange accuracy of the cooling liquid circulation system 50 can be precisely controlled by the proportional valve 40.
In the present embodiment, as shown in fig. 1, the first cooling liquid circulation system 51 is a first cooling liquid pipeline disposed between the pipeline pump 20 and the proportional valve 40, and the second cooling liquid circulation system 52 includes a first pipeline 521 communicated with the pipeline pump 20, a second pipeline 522 communicated with the proportional valve 40, at least two heat exchangers 523 connected in parallel between the first pipeline 521 and the second pipeline 522, and an external cooling water circulation system 524 connected in series to the two heat exchangers 523. At least two heat exchangers 523 are connected in parallel in the second cooling liquid circulation system 52, and the heat exchangers 523 are connected in parallel, so that the heat exchange amount of the whole cooling liquid circulation system 50 can be effectively improved on the premise of not changing all controllers and pipelines in the cooling liquid temperature control circulation system 100, the heat exchange range which can be covered by the whole cooling liquid temperature control system 100 is greatly widened, and the accurate control of the heat exchange temperature in the heat exchange range can be ensured. And the heat exchanger 423 can select the heat exchanger 523 with proper heat exchange efficiency to be combined for use according to the requirement of actual test.
In the second coolant circulation system 52, the plurality of heat exchangers 523 are connected in parallel with each other. When the power of the engine 10 tested in the system 100 is greater, the multiple heat exchangers 523 are simultaneously operated to increase the heat exchange efficiency in the system 100 to meet the test requirements. When the power of the engine 10 tested in the system 100 is low, part of the heat exchangers 523 in the plurality of heat exchangers 523 may be turned off, and only the heat exchanger 523 required to be used is reserved to meet the heat exchange requirement. The heat exchangers 523 arranged in parallel can be used simultaneously or selectively as needed, and the normal use of other components in the whole coolant temperature control circulation system 100 is not affected in the use process.
When the plurality of heat exchangers 523 are connected in parallel in the second cooling liquid circulation system 52, the external cooling water circulation system 524 arranged in the second cooling liquid circulation system 52 passes through each heat exchanger 523 in a series connection manner to meet the normal working requirement of the heat exchangers 523, the external cooling water circulation system 524 has a water inlet pipeline, an intermediate pipeline and a water outlet pipeline which are connected in series between the plurality of heat exchangers 523, the water inlet pipeline and the water outlet pipeline are respectively provided with a manual ball valve and a pressure gauge to control the pressure and the flow of the cooling water in the external cooling water circulation system 524, and the water inlet pipeline is also provided with a filter to filter the cooling water in all the pipelines of the external cooling water circulation system 524.
Further, as shown in fig. 1, the coolant temperature control system 100 further includes a heating cartridge 60 disposed between the pipe pump 20 and the coolant circulation system 50 for heating the coolant temperature. The heater cartridge 60 may function to heat the coolant when the temperature of the coolant in the entire coolant temperature control loop system 100 is insufficient. When a new engine 10 to be tested is connected to the system 100, the temperature of the coolant in the whole system 100 cannot reach the temperature required by circulation, the coolant can be rapidly heated by the heating cylinder 60, the heat engine time in the engine test process is shortened, and the efficiency of the engine test is improved.
Specifically, as shown in fig. 5, the heating cartridge 60 includes a cylinder 61 containing a cooling liquid, a heating pipe 62 disposed on the cylinder 61, and a temperature sensor 63. The cylinder 61 of the heating cylinder 63 can contain the cooling liquid passing through all the pipelines of the system 100, and the cooling liquid passing through the cylinder 61 is heated by the heating pipe 62 arranged in the cylinder 61, so that the cooling liquid reaches the temperature requirement of the test as soon as possible. And a temperature sensor 63 is arranged on the cylinder 61, so that the temperature of the cooling liquid in the cylinder 61 can be monitored in real time, and when the temperature of the cooling liquid in the cylinder 61 reaches the temperature required by the system 100 test, the heating pipe 62 is closed, so that the heating is stopped.
Specifically, as shown in fig. 5, the present invention provides a heating cartridge 60, in which the top of the barrel 61 is provided with an opening 611 for inserting the heating tube 62 into the barrel 61. The heating pipe 62 is inserted into the cylinder 61 from the opening 611, and heats the coolant passing through the cylinder 61. A liquid-blocking ring 612 is disposed inside the cylinder 61 and is sleeved outside the heating pipe 62. This liquid blocking ring 612's setting can guarantee that heating pipe 62 invades in the coolant liquid of barrel 61 completely, prevents that the coolant liquid in the barrel 61 from being inhaled by tubing pump 20 and empties and the problem of appearing dry combustion completely, and this liquid blocking ring 612 also can guarantee simultaneously that whole heating pipe 62 all can contact the coolant liquid in the heating process, and the liquid level of this coolant liquid can be on high liquid level all the time. As shown in fig. 5, the liquid blocking ring 612 includes a first liquid blocking ring 6121 extending from the inner wall of the cylinder 61 toward the center of the cylinder 61 and a second liquid blocking ring 6122 extending from the first liquid blocking ring 6121 toward the opening 611, and a liquid outlet 613 located above the first liquid blocking ring 6121, a liquid inlet 614 and a temperature sensor mounting opening 614 located below the first liquid blocking ring 6121 are disposed on the side surface of the cylinder 61. The liquid outlet 613 is located above the first liquid baffle ring 6121, so as to ensure that the cooling liquid can only flow out from the liquid outlet 613 when the liquid level of the cooling liquid in the barrel 61 is higher than the second liquid baffle ring 6122. And this temperature sensor installing port 614 sets up in the middle part of barrel 61, can be more accurate the inside coolant liquid's of monitoring whole barrel 61 temperature.
Further, as shown in fig. 1, in the coolant temperature control system 100 provided by the present invention, the second coolant circulating system 52 further includes a first control switch 525 disposed between the heat exchanger 523 and the first pipe 521. The first control switch 525 can independently turn on or off the corresponding heat exchanger 523, so that the use of the heat exchanger 523 in the second cooling liquid circulation system 52 can be more accurately controlled. In the present embodiment, as shown in fig. 1, the second coolant circulation system 52 includes a first heat exchanger 5231 and a second heat exchanger 5232 which are arranged in parallel, the first heat exchanger 5231 is communicated with the first pipe 521, and a first control switch 525 is arranged between the second heat exchanger 5232 and the first pipe 521. When the power of the engine tested in the system 100 is large, the first control switch 525 is turned on, so that the first heat exchanger 5231 and the second heat exchanger 5232 operate simultaneously, and the heat exchange efficiency of the second coolant circulation system 52 is improved. When the power of the engine 10 tested in the system 100 is low, the first control switch 525 may be turned off, so that the second heat exchanger 5232 connected to the first control switch 525 is turned off, and only the first heat exchanger 5231 of the second coolant circulation system 52 is operated to meet the heat exchanger requirement of the engine 10. The second cooling liquid circulation system 52 can greatly improve the heat exchange range in the whole cooling liquid temperature control system 100, and can also adjust the utilization rate of the heat exchanger according to actual needs, so that the accuracy of temperature control is higher.
Further, as shown in fig. 1, the second coolant circulation system 52 further includes a discharge pipe 526 connected in parallel to the second pipe 522 and a discharge control switch 527 disposed on the discharge pipe. The drain pipe 526 and the drain control switch 527 are provided to drain the liquid in the pipe when the entire coolant circulation system 50 is inspected or maintained, thereby facilitating the maintenance of the second coolant circulation system 52 having the heat exchanger 523.
Further, as shown in fig. 1, the cooling liquid temperature control system 100 of the present invention further includes an external cooling liquid circulation system 70 for adjusting the flow rate and pressure in the pipe of the cooling liquid temperature control system 100, wherein the external cooling liquid circulation system 70 includes an external cooling liquid circulation pipe 71 connected between the liquid outlet pipe 11 and the liquid inlet pipe 12, and a second control switch 72 disposed on the external cooling liquid circulation pipe 71. Since the pressure of the coolant circulation provided by the pipe pump 20 provided in the coolant temperature control system 100 is much greater than the pressure of the coolant inside the engine 10, the external coolant circulation system 70 provided outside the engine 10 can effectively balance the pressures inside and outside the engine 10 in order to ensure that a constant pressure is maintained in the entire system 100, regardless of whether the coolant circulation system 50 or the engine 10 is inside. When the pressure of the coolant in the engine 10 is greater than the pressure of the coolant in the engine, the second control switch 72 is turned on, so that the external coolant pipe 71 can be well depressurized to the system, and the coolant directly flows into the external coolant pipe 71 from the outlet of the proportional valve 40 and flows back into the pipe pump 20 again to form an external coolant circulation process.
Further, as shown in fig. 1, the coolant temperature control system 100 provided by the present invention further includes a monitoring device 80, wherein the monitoring device 80 includes a temperature monitoring device 81, a pressure monitoring device 82 and a third control switch 83, which are disposed on the liquid outlet pipe 11 and the liquid inlet pipe 12. The monitoring device 80 is disposed on the liquid outlet pipe 11 and the liquid inlet pipe 12 of the engine 10, and monitors the coolant entering or exiting the engine 10. The temperature detection device 81 in the monitoring device 80 is a temperature sensor, and can monitor the temperature of the coolant flowing out from the liquid outlet pipe 11 of the engine 10 in real time and can monitor the temperature of the coolant entering the liquid inlet pipe 12 through the proportional valve 40 in real time. The pressure detection device 82 in the monitoring device 80 is a pressure sensor, and can monitor the pressure of the coolant at the liquid outlet pipe 11 of the engine 10 in real time and also monitor the pressure of the coolant at the liquid inlet pipe 12 of the engine 10 in real time. And the third control switch 83 is a manual ball valve disposed on the liquid outlet pipe 11 and the liquid inlet pipe 12, and the inlet and outlet of the cooling liquid in the engine 10 can be turned on or off by the third control switch 83.
Further, as shown in fig. 1 to 4, the coolant temperature control system 100 provided by the present invention further includes a supply device 31 capable of supplying coolant to the expansion tank 30, wherein the supply device 31 includes a low-level tank 311, a fluid supply pipe 312 connecting the low-level tank 311 and the expansion tank 30, a fluid supply pump 313 disposed on the fluid supply pipe 312, and a filter 314. The replenishment device 31 can supply the expansion tank 30 with the replenishment liquid when the cooling liquid therein is insufficient. When the liquid level in the expansion tank 30 is lower than the lowest value of the liquid level meter, the liquid supplementing pump 313 is started to supplement the cooling liquid in the low-level water tank 311 into the expansion tank 30, so that sufficient cooling liquid in the expansion tank 30 can be always supplied to the cooling liquid temperature control system 100. The low-level water tank 311 is provided with a fluid replenishment port 3111, and fluid is replenished to the low-level water tank 311 through the fluid replenishment port 3111. The low level tank 311 is further provided with a water outlet 3112, which can drain the liquid in the low level tank 311, even the liquid in the expansion tank 30, and thus, the maintenance and cleaning of the expansion tank 30 and the low level tank 311 are realized. The filter 314 disposed on the fluid infusion pipe 312 keeps the coolant entering the expansion tank 30 from being filtered, so as to ensure that all the coolant in the system 100 is filtered, thereby reducing impurities in the pipe.
Further, as shown in fig. 1, the coolant temperature control system 100 provided by the present invention further includes an exhaust device 90. With the normal operation of the coolant temperature control system 100, after the coolant is heated by the heating cylinder 61, the coolant in the entire pipe is heated to generate steam, and the gas generated by the coolant in each pipe and the gas generated in the engine in the system 100 need to be discharged to ensure the circulation of the coolant in the entire coolant temperature control system 100. The exhaust device 90 includes a first exhaust pipe 91 provided in the expansion tank 30 and communicating the expansion tank 30 with the outside, a second exhaust pipe 92 communicating between the engine 10 and the expansion tank 30, and a third exhaust pipe 93 communicating between the coolant circulation system 50 and the expansion tank 30. The third exhaust pipe 93 may directly transfer gas inside the engine 10 to the expansion tank 30, and ensure stability of circulation of coolant inside the engine 10. The second exhaust pipe 92 can transmit the gas in the pipes of the entire cooling fluid circulation system 50 and the gas in the heating cylinder 60 to the expansion tank 30, so as to ensure the stability of the cooling fluid circulation in all the pipes of the entire system 100. The first exhaust pipe 91 exhausts the gas in the expansion tank 30 to the atmosphere, and when the pressure in the coolant temperature control system 100 is too high, the pressure can be released through the first exhaust pipe 91. An electrical contact pressure gauge and a safety valve are also installed on the expansion tank 30.
According to the cooling liquid temperature control system 100 provided by the invention, the cooling liquid temperature control system 100 is provided with the first cooling liquid circulation system 51 and the second cooling liquid circulation system 52 which are arranged in parallel, and the second cooling liquid circulation system 52 is also connected with the at least two heat exchangers 523 in parallel, so that the heat exchange range of the whole cooling liquid circulation system 50 is widened, the flow of cooling liquid in the two independent cooling liquid circulation systems 50 is finally controlled by the proportional valve 40, the proportion of actually connecting the heat exchangers 523 can be adjusted according to the heat exchange quantity requirements of different engines 10, on the premise of not changing a temperature controller, the heat exchange range of the system is improved, the utilization rate of the heat exchangers 523 can be controlled by adjusting the proportional valve 40, and the temperature control precision is ensured.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cooling liquid temperature control system is used in an engine test experiment, a liquid outlet pipe and a liquid inlet pipe which can be used for cooling liquid to enter and exit are arranged on an engine, and the cooling liquid temperature control system is characterized by comprising a pipeline pump connected to the liquid outlet pipe, an expansion water tank for supplying the cooling liquid, a proportional valve connected to the liquid inlet pipe and a cooling liquid circulating system arranged between the pipeline pump and the proportional valve, wherein the cooling liquid circulating system comprises a first cooling liquid circulating system and a second cooling liquid circulating system which are connected in parallel, the first cooling liquid circulating system is a first cooling liquid pipeline arranged between the pipeline pump and the proportional valve, the second cooling liquid circulating system comprises a first pipeline communicated with the pipeline pump, a second pipeline communicated with the proportional valve, at least two heat exchangers connected in parallel between the first pipeline and the second pipeline and at least two heat exchangers connected in series, and external cooling water circulating systems connected with the two heat exchangers A ring system; in the second cooling liquid circulating system, a plurality of heat exchangers are connected in parallel.
2. The coolant temperature control system according to claim 1, further comprising a heating cartridge disposed between the pipe pump and the coolant circulation system for heating the coolant temperature.
3. The coolant temperature control system according to claim 2, wherein the heating cylinder includes a cylinder for containing the coolant, a heating pipe and a temperature sensor disposed on the cylinder, an opening is disposed at a top of the cylinder for inserting the heating pipe into the cylinder, a liquid blocking ring is disposed in the cylinder and sleeved outside the heating pipe, the liquid blocking ring includes a first liquid blocking ring extending from an inner wall of the cylinder toward a center of the cylinder and a second liquid blocking ring extending from the first liquid blocking ring toward the opening, and a liquid inlet and a temperature sensor mounting opening are disposed at a side of the cylinder and located above a liquid outlet of the first liquid blocking ring and below the first liquid blocking ring.
4. The coolant temperature control system of claim 1, wherein the second coolant circulation system further comprises a first control switch disposed between the heat exchanger and the first conduit.
5. The coolant temperature control system according to claim 4, wherein the second coolant circulation system comprises a first heat exchanger and a second heat exchanger which are arranged in parallel, the first heat exchanger is communicated with the first pipeline, and the first control switch is arranged between the second heat exchanger and the first pipeline.
6. The coolant temperature control system according to claim 1, wherein the second coolant circulation system further comprises a water discharge pipe connected in parallel to the second pipe and a water discharge control switch disposed on the water discharge pipe.
7. The coolant temperature control system of claim 1, further comprising an external coolant circulation system for regulating flow and pressure in the coolant temperature control system conduit, the external coolant circulation system comprising an external coolant circulation conduit connected between the outlet conduit and the inlet conduit and a second control switch disposed on the external coolant circulation conduit.
8. The coolant temperature control system of claim 1, further comprising a monitoring device, wherein the monitoring device comprises a temperature monitoring device, a pressure monitoring device and a third control switch, the temperature monitoring device, the pressure monitoring device and the third control switch are disposed on the liquid outlet pipe and the liquid inlet pipe.
9. The coolant temperature control system according to claim 1, further comprising a supply device for supplying coolant to the expansion tank, wherein the supply device comprises a low-level water tank, a fluid supply pipe for connecting the low-level water tank and the expansion tank, a fluid supply pump disposed on the fluid supply pipe, and a filter.
10. The coolant temperature control system according to claim 1, further comprising an exhaust device, wherein the exhaust device includes a first exhaust pipe disposed on the expansion tank to communicate the expansion tank with the outside, a second exhaust pipe communicating between the engine and the expansion tank, and a third exhaust pipe communicating between the coolant circulation system and the expansion tank.
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| CN201911031994.2A CN112727587B (en) | 2019-10-28 | 2019-10-28 | Coolant liquid temperature control system |
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| CN201911031994.2A CN112727587B (en) | 2019-10-28 | 2019-10-28 | Coolant liquid temperature control system |
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| CN112727587B true CN112727587B (en) | 2022-05-03 |
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| CN202914168U (en) * | 2012-07-04 | 2013-05-01 | 武汉东测科技有限责任公司 | Improved engine coolant temperature control device |
| CN103398850B (en) * | 2013-07-02 | 2016-01-13 | 广西玉柴机器股份有限公司 | Engine trial run stand coolant circulation unit |
| CN104234813A (en) * | 2014-08-30 | 2014-12-24 | 中国煤炭科工集团太原研究院有限公司 | Coolant temperature control circulating system for performance test of mining explosion-proof diesel engine |
| CN204440208U (en) * | 2015-02-05 | 2015-07-01 | 中国第一汽车股份有限公司 | A kind of coolant temperature for engine rig test and volume control device |
| CN107844139A (en) * | 2017-11-10 | 2018-03-27 | 重庆凯特动力科技有限公司 | Cold thermostat in car engine test stand high-precision analog |
| CN108775705B (en) * | 2018-07-16 | 2024-02-13 | 北京福泰奥科技发展有限公司 | Heating boiler capable of inhibiting scale |
| CN209460660U (en) * | 2018-12-30 | 2019-10-01 | 苏州英特模汽车科技有限公司 | Automobile test cooling medium low temperature high temperature switching control |
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2019
- 2019-10-28 CN CN201911031994.2A patent/CN112727587B/en active Active
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