CN110609579A - Water constant temperature control method and device for engine test bed - Google Patents
Water constant temperature control method and device for engine test bed Download PDFInfo
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention discloses a water constant temperature control method and a water constant temperature control device of an engine test bed, and particularly relates to the technical field of engine temperature control, wherein the water constant temperature control device comprises a base, wherein a fixed rod is fixedly arranged at the top of the base, a water tank is arranged at the top of the fixed rod, a water pump is arranged on one side of the water tank, and a low temperature control mechanism is arranged at the output end of the water pump; the low temperature control mechanism comprises a first water chiller, and a first connecting pipe is arranged at the output end of the first water chiller. According to the invention, the low-temperature control mechanism is arranged, the water pump conveys normal-temperature water in the water tank to the inside of the first water cooler for cooling, the first circulating pump conveys water circulating from the inside of the engine in the water outlet pipe to the second water cooler for cooling, and then the water is conveyed to the inside of the engine again for use, so that the effect of circulating cooling is achieved, the water can be directly conveyed in a low-temperature control mode and conveyed in a circulating cooling control mode according to the requirement, and the temperature control force of the conveyed water is improved.
Description
Technical Field
The invention relates to the technical field of engine temperature control, in particular to a water constant temperature control method and device for an engine test bed.
Background
At present, in the process of developing and testing an internal combustion engine, the auxiliary equipment of an engine test bed plays an indispensable role in the process of testing the engine, a high-precision water constant-temperature control system can provide the same external conditions under the same working condition for the engine test, and a reliable and continuous test environment is provided for the engine test.
The invention patent of patent application publication No. CN105137907A discloses a water constant temperature control method and device of an engine test bed, belonging to the field of combined control of engine heating or refrigeration. According to the water constant temperature control method of the engine test bed, when the proportional valve is adjusted, the proportional valve is directly opened at a certain opening degree, and then the proportional valve is controlled in a PID adjusting mode in combination with the proportional valve. The water constant temperature control device of the engine test bed adopts an indirect cooling mode to work, an external cold source is completely isolated from gas, when a system fails, such as a pipeline bursts and leaks water, the work of the whole chilled water system cannot be influenced, and the loss of anti-freezing solution is reduced. Impurities in the whole chilled water system can be isolated, so that the impurities cannot enter the circulation of the system, and the reliability of the system is improved. The indirect cooling makes the intake air temperature more stable and easier to control.
However, in practical use, the invention can not carry out direct low-temperature delivery and circulating cooling delivery on water, and has lower control strength on the temperature of the water used by the engine.
Disclosure of the invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a method and an apparatus for controlling water constant temperature of an engine test bed, in which a low temperature control mechanism is provided, a water pump conveys normal temperature water in a water tank to a first water chiller for cooling, and then conveys the water to the interior of a water inlet pipe through a first connecting pipe, so as to directly convey cold water, and a first circulating pump conveys water circulating from the interior of an engine to a second water chiller for cooling and then conveys the water to the interior of the engine again for use, so as to achieve an effect of circulating cooling.
In order to achieve the purpose, the invention provides the following technical scheme: a water constant temperature control device of an engine test bed comprises a base, wherein a fixed rod is fixedly arranged at the top of the base, a water tank is arranged at the top of the fixed rod, a water pump is arranged on one side of the water tank, and a low temperature control mechanism is arranged at the output end of the water pump;
the low-temperature control mechanism comprises a first water chiller, a first connecting pipe is arranged at the output end of the first water chiller, a first electromagnetic valve is fixedly arranged in the first connecting pipe, a flow valve is arranged on one side of the first electromagnetic valve, a first tee joint is fixedly arranged at one end of the first connecting pipe, a water inlet pipe is fixedly arranged at one side of the first tee joint, the top of the first tee joint is fixedly provided with a circulating pipe, the top of the circulating pipe is fixedly provided with a first circulating pump, the input end of the first circulating pump is provided with a second water cooler, the input end of the second water cooler is provided with a second connecting pipe, a second electromagnetic valve is arranged in the second connecting pipe, a second tee joint is fixedly arranged at one end of the second connecting pipe, a water outlet pipe is fixedly arranged on one side of the second tee joint, a second circulating pump is arranged in one side of the water outlet pipe, and a high-temperature control mechanism is arranged at the bottom of the second tee joint;
the high-temperature control mechanism comprises a third connecting pipe, the top end of the third connecting pipe is fixedly connected with the bottom of the third connecting pipe, a fourth tee joint is fixedly arranged at the bottom end of the third connecting pipe, a fourth connecting pipe is arranged on one side of the fourth tee joint, a water heater is arranged at one end of the fourth connecting pipe, a first hot water output pipe is arranged at the output end of the water heater, a fifth connecting pipe is fixedly arranged on the other side of the fourth tee joint, an air heat exchanger is arranged at one end of the fifth connecting pipe, a second hot water output pipe is arranged at the output end of the top of the air heat exchanger, an air inlet pipe is arranged at the input end of one side of the air heat.
In a preferred embodiment, a third electromagnetic valve is arranged inside the air inlet pipe, a through air pipe is arranged at the top of the air inlet pipe, and a fourth electromagnetic valve is arranged inside the through air pipe.
In a preferred embodiment, the bottom of the water pump, the first water chiller, the first circulating pump, the second water chiller, the water heater and the air heat exchanger is fixedly provided with a support rod, and the support rod is fixedly connected with the base.
In a preferred embodiment, one end of each of the first hot water outlet pipe and the second hot water outlet pipe is connected to the water inlet pipe.
In a preferred embodiment, a fifth solenoid valve is arranged inside each of the fourth connecting pipe and the fifth connecting pipe.
The water constant temperature control method of the engine test bed comprises the following specific steps:
the method comprises the following steps that firstly, a water inlet pipe and a water outlet pipe are communicated with a water inlet and a water outlet of an engine to be tested, an air inlet pipe and an air outlet pipe are communicated with an air exhaust port of the engine, when low-temperature control is needed, a water pump is started, normal-temperature water in a water tank is conveyed to the interior of a first water cooling machine by the water pump, cooled and conveyed to the interior of the water inlet pipe through a first connecting pipe, so that the normal-temperature water is conveyed to the interior of the engine;
step two, the flow valve detects the water delivery amount in real time, after the water delivery amount reaches a specified amount, the first electromagnetic valve is opened to seal the flow valve, then the first circulating pump is opened, the first circulating pump conveys water at the circulating position inside the water outlet pipe from the engine to the second water cooler for cooling, and then conveys the water to the inside of the engine again for use, so that the effect of circular cooling is achieved;
step three, when the water needs to be directly heated, a second electromagnetic valve is opened, the second electromagnetic valve seals a second connecting pipe, then a second circulating pump is opened, the second circulating pump conveys the water in the water outlet pipe from the internal circulation position of the engine to the inside of a third connecting pipe, a fifth electromagnetic valve in a fifth connecting pipe is opened, the fifth connecting pipe is closed, so that the water enters a water heater through a fourth connecting pipe to be heated, then the water heater conveys the water heated to a certain temperature to the inside of the water inlet pipe through a first hot water output pipe, and then the water flows into the engine again;
and step four, when the water needs to be indirectly heated, a second electromagnetic valve in the fourth connecting pipe is opened, the second electromagnetic valve closes the fourth connecting pipe, then the water flows into the air heat exchanger, then high-temperature gas exhausted by the engine enters the air heat exchanger and exchanges heat with the water in the air heat exchanger, then the water is conveyed to the interior of the water inlet pipe through a second hot water output pipe, then the water flows into the interior of the engine again, and exhaust of the engine can be directly discharged through the straight-through air pipe.
In a preferred embodiment, in the fourth step, the third electromagnetic valve may be opened, the third electromagnetic valve closes the air inlet pipe, and then the exhaust gas of the engine is discharged through the through air pipe, so that direct discharge may be performed, and the air heat exchanger may not be used.
The invention has the technical effects and advantages that:
1. through setting up the low temperature control mechanism, the water pump carries the normal atmospheric temperature water in the water tank to the inside of first cold water machine after cooling, carry through the first connecting pipe inside the water inlet pipe, can directly carry out the cold water and carry, the first circulating pump carries the water from the internal circulation of engine in the outlet pipe to the second cold water machine and carries the use inside the engine again after cooling, thereby reach the effect of circulation cooling, compare with prior art, can carry out direct low temperature control transport and circulation cooling control transport with water as required, promote the temperature control dynamics to the water of carrying;
2. through setting up high temperature control mechanism, water enters into the inside heating of water heater through the fourth connecting pipe, later the water heater will heat the water of certain temperature through first hot water output tube and carry the intake intraduct, inside water flowed into air heat exchanger, later engine exhaust high temperature gas enters into air heat exchanger after and carries out the heat transfer with inside water, later carry water intraduct through second hot water output tube with water intake, later flow into inside the engine once more, can directly discharge the exhaust of engine through direct trachea, compare with prior art, can effectual adoption directly rise to the temperature and to the mode that the high temperature gas heat transfer heaies up, effectually utilize exhaust high temperature gas.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of a portion A of FIG. 1 according to the present invention.
FIG. 3 is a schematic view of a partial structure of the portion B shown in FIG. 1 according to the present invention.
Fig. 4 is a schematic view of a partial structure of the part C in fig. 1 according to the present invention.
Fig. 5 is a perspective view of a first tee joint of the present invention.
The reference signs are: 1 base, 2 dead levers, 3 water tanks, 4 water pumps, 5 low temperature control mechanisms, 6 first water coolers, 7 first connecting pipes, 8 first electromagnetic valves, 9 flow valves, 10 first tee joints, 11 water inlet pipes, 12 circulating pipes, 13 first circulating pumps, 14 second water coolers, 15 second connecting pipes, 16 second electromagnetic valves, 17 second tee joints, 18 water outlet pipes, 19 second circulating pumps, 20 high temperature control mechanisms, 21 third connecting pipes, 22 fourth tee joints, 23 fourth connecting pipes, 24 water heaters, 25 first hot water output pipes, 26 fifth connecting pipes, 27 air heat exchangers, 28 second hot water output pipes, 29 air inlet pipes, 30 air outlet pipes, 31 third electromagnetic valves, 32 straight air pipes, 33 fourth electromagnetic valves, 34 supporting rods and 35 fifth electromagnetic valves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The water constant temperature control device of the engine test bed as shown in the attached figures 1-5 comprises a base 1, wherein a fixed rod 2 is fixedly arranged at the top of the base 1, a water tank 3 is arranged at the top of the fixed rod 2, a water pump 4 is arranged on one side of the water tank 3, and a low temperature control mechanism 5 is arranged at the output end of the water pump 4;
the low-temperature control mechanism 5 comprises a first water chiller 6, a first connecting pipe 7 is arranged at the output end of the first water chiller 6, a first electromagnetic valve 8 is fixedly arranged in the first connecting pipe 7, a flow valve 9 is arranged on one side of the first electromagnetic valve 8, a first tee joint 10 is fixedly arranged at one end of the first connecting pipe 7, a water inlet pipe 11 is fixedly arranged on one side of the first tee joint 10, a circulating pipe 12 is fixedly arranged at the top of the first tee joint 10, a first circulating pump 13 is fixedly arranged at the top end of the circulating pipe 12, a second water chiller 14 is arranged at the input end of the first circulating pump 13, a second connecting pipe 15 is arranged at the input end of the second water chiller 14, a second electromagnetic valve 16 is arranged in the second connecting pipe 15, a second tee joint 17 is fixedly arranged at one end of the second connecting pipe 15, a water outlet pipe 18 is fixedly arranged on one side of the second tee joint 17, the bottom of the second tee joint 17 is provided with a high-temperature control mechanism 20;
the bottoms of the water pump 4, the first water cooler 6, the first circulating pump 13, the second circulating pump 19, the second water cooler 14, the water heater 24 and the air heat exchanger 27 are all fixedly provided with supporting rods 34, and the supporting rods 34 are fixedly connected with the base 1;
one end of each of the first hot water output pipe 25 and the second hot water output pipe 28 is communicated with the water inlet pipe 11.
The implementation mode is specifically as follows: the water inlet pipe 11 and the water outlet pipe 18 are communicated with a water inlet and a water outlet of an engine to be tested, the air inlet pipe 29 and the air outlet pipe 30 are communicated with an air outlet of the engine, when low-temperature control is required, the water pump 4 is opened, the water pump 4 conveys normal-temperature water in the water tank 3 into the first water chiller 6 for cooling, and then conveys the water into the water inlet pipe 11 through the first connecting pipe 7 for conveying into the engine, cold water can be directly conveyed, the flow valve 9 detects the water conveying amount in real time, after the water conveying amount reaches a specified amount, the first electromagnetic valve 8 is opened to seal the flow valve 9, then the first circulating pump 13 is opened, the water in the water outlet pipe 18 from the internal circulation of the engine is conveyed into the second water chiller 14 for cooling and then conveyed into the engine again for use, so as to achieve the effect of, can carry out direct low temperature control with water as required and carry with circulation cooling control, promote the temperature control dynamics to the water of carrying, this embodiment has specifically solved the problem that can not carry out direct low temperature to water and carry with the circulation that exists among the prior art, and the temperature control dynamics to the water that the engine used is lower.
The water constant temperature control device of the engine test bed as shown in fig. 1 further comprises a high temperature control mechanism 20, the high temperature control mechanism 20 is arranged at the bottom of the second tee joint 17, the high temperature control mechanism 20 comprises a third connecting pipe 21, the top end of the third connecting pipe 21 is fixedly connected with the bottom of the third connecting pipe 21, the bottom end of the third connecting pipe 21 is fixedly provided with a fourth tee joint 22, one side of the fourth tee joint 22 is provided with a fourth connecting pipe 23, one end of the fourth connecting pipe 23 is provided with a water heater 24, the output end of the water heater 24 is provided with a first hot water output pipe 25, the other side of the fourth tee joint 22 is fixedly provided with a fifth connecting pipe 26, one end of the fifth connecting pipe 26 is provided with an air heat exchanger 27, the output end of the top of the air heat exchanger 27 is provided with a second hot water output pipe 28, the, an air outlet pipe 30 is arranged at the output end of one side of the air heat exchanger 27;
a third electromagnetic valve 31 is arranged inside the air inlet pipe 29, a through air pipe 32 is arranged at the top of the air inlet pipe 29, and a fourth electromagnetic valve 33 is arranged inside the through air pipe 32;
the fourth connecting pipe 23 and the fifth connecting pipe 26 are both provided with a fifth solenoid valve 35 inside, so that the water inside the fourth connecting pipe 23 and the fifth connecting pipe 26 can be effectively controlled.
The implementation mode is specifically as follows: when the water needs to be directly heated, the second electromagnetic valve 16 is opened, the second electromagnetic valve 16 closes the second connecting pipe 15, then the second circulating pump 19 is opened, the second circulating pump 19 conveys the water in the water outlet pipe 18 from the internal circulation of the engine to the inside of the third connecting pipe 21, the fifth electromagnetic valve 35 in the fifth connecting pipe 26 is opened, the fifth connecting pipe 26 is closed, so that the water enters the water heater 24 through the fourth connecting pipe 23 to be heated, then the water heater 24 conveys the water heated to a certain temperature to the inside of the water inlet pipe 11 through the first hot water output pipe 25, then the water flows into the engine again, when the water needs to be indirectly heated, the second electromagnetic valve 16 in the fourth connecting pipe 23 is opened, the second electromagnetic valve 16 closes the fourth connecting pipe 23, then the water flows into the air heat exchanger 27, then the high-temperature gas discharged by the engine enters the air heat exchanger 27 to exchange heat with the water in the inside, the water is conveyed to the interior of the water inlet pipe 11 through the second hot water output pipe 28, then the water flows into the interior of the engine again, exhaust of the engine can be directly discharged through the through air pipe 32, direct temperature rise and high-temperature gas heat exchange temperature rise can be effectively adopted, the discharged high-temperature gas is effectively utilized, and the problems that direct and indirect temperature rise control cannot be effectively carried out and the temperature rise control mode is few in the prior art are specifically solved by the implementation mode.
The water constant temperature control method of the engine test bed comprises the following specific steps:
step one, a water inlet pipe 11 and a water outlet pipe 18 are communicated with a water inlet and a water outlet of an engine to be tested, an air inlet pipe 29 and an air outlet pipe 30 are communicated with an air outlet of the engine, when low-temperature control is needed, a water pump 4 is started, the water pump 4 conveys normal-temperature water in a water tank 3 to the interior of a first water cooler 6 for cooling, and then the normal-temperature water is conveyed to the interior of the water inlet pipe 11 through a first connecting pipe 7 so as to be conveyed to the interior of the engine, and cold water can be directly;
step two, the flow valve 9 detects the water delivery amount in real time, after the water delivery amount reaches a specified amount, the first electromagnetic valve 8 is opened to seal the flow valve 9, then the first circulating pump 13 is opened, the first circulating pump 13 conveys water in the water outlet pipe 18 from the internal circulation position of the engine to the second water cooler 14 for cooling and then conveys the water to the internal part of the engine for use again, and therefore the effect of circular cooling is achieved;
step three, when the water needs to be directly heated, the second electromagnetic valve 16 is opened, the second electromagnetic valve 16 seals the second connecting pipe 15, then the second circulating pump 19 is opened, the second circulating pump 19 conveys the water in the water outlet pipe 18 from the internal circulation of the engine to the inside of the third connecting pipe 21, the fifth electromagnetic valve 35 in the fifth connecting pipe 26 is opened, the fifth connecting pipe 26 is closed, so that the water enters the water heater 24 through the fourth connecting pipe 23 to be heated, then the water heater 24 conveys the water heated to a certain temperature to the inside of the water inlet pipe 11 through the first hot water output pipe 25, and then the water flows into the engine again;
step four, when the water needs to be indirectly heated, a second electromagnetic valve 16 in a fourth connecting pipe 23 is opened, the second electromagnetic valve 16 closes the fourth connecting pipe 23, then the water flows into an air heat exchanger 27, then high-temperature gas exhausted by the engine enters the air heat exchanger 27 and exchanges heat with the water in the air heat exchanger, then the water is conveyed into a water inlet pipe 11 through a second hot water output pipe 28 and then flows into the engine again, and exhaust gas of the engine can be directly discharged through a straight-through air pipe 32;
in the fourth step, the third electromagnetic valve 31 may be opened, the third electromagnetic valve 31 closes the intake pipe 29, and then the exhaust gas of the engine is discharged through the through air pipe 32, so that direct discharge may be performed, and the air heat exchanger 27 may not be used.
The working principle of the invention is as follows:
referring to the attached drawings 1-5 of the specification, a water pump 4 conveys normal-temperature water in a water tank 3 into a first water cooler 6 for cooling, and then conveys the water into a water inlet pipe 11 through a first connecting pipe 7, so that cold water can be directly conveyed, a first circulating pump 13 conveys water in a water outlet pipe 18 from the internal circulation position of an engine to a second water cooler 14 for cooling, and then conveys the water into the engine again for use, so that the effect of circular cooling is achieved, the water can be directly conveyed in a low-temperature control mode and conveyed in a circular cooling control mode according to the requirement, and the temperature control force of the conveyed water is improved;
referring to the attached drawing 1 of the specification, water enters the water heater 24 through the fourth connecting pipe 23 to be heated, then the water heater 24 conveys water heated to a certain temperature to the inside of the water inlet pipe 11 through the first hot water output pipe 25, the water flows into the inside of the air heat exchanger 27, then high-temperature gas exhausted by the engine enters the air heat exchanger 27 to exchange heat with the water inside, then the water is conveyed to the inside of the water inlet pipe 11 through the second hot water output pipe 28, then the water flows into the inside of the engine again, exhaust gas of the engine can be directly discharged through the straight-through air pipe 32, a mode of directly heating and heating the high-temperature gas through heat exchange can be effectively adopted, and the exhausted high-temperature gas can be effectively utilized.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a water constant temperature control device of engine test bench, includes base (1), its characterized in that: a fixed rod (2) is fixedly arranged at the top of the base (1), a water tank (3) is arranged at the top of the fixed rod (2), a water pump (4) is arranged on one side of the water tank (3), and a low-temperature control mechanism (5) is arranged at the output end of the water pump (4);
the low-temperature control mechanism (5) comprises a first water cooling machine (6), a first connecting pipe (7) is arranged at the output end of the first water cooling machine (6), a first electromagnetic valve (8) is fixedly arranged inside the first connecting pipe (7), a flow valve (9) is arranged on one side of the first electromagnetic valve (8), a first tee joint (10) is fixedly arranged at one end of the first connecting pipe (7), a water inlet pipe (11) is fixedly arranged on one side of the first tee joint (10), a circulating pipe (12) is fixedly arranged at the top of the first tee joint (10), a first circulating pump (13) is fixedly arranged at the top end of the circulating pipe (12), a second water cooling machine (14) is arranged at the input end of the first circulating pump (13), a second connecting pipe (15) is arranged at the input end of the second water cooling machine (14), a second electromagnetic valve (16) is arranged inside the second connecting pipe (15), a second tee joint (17) is fixedly arranged at one, a water outlet pipe (18) is fixedly arranged on one side of the second tee joint (17), a second circulating pump (19) is arranged inside one side of the water outlet pipe (18), and a high-temperature control mechanism (20) is arranged at the bottom of the second tee joint (17);
the high-temperature control mechanism (20) comprises a third connecting pipe (21), the top end of the third connecting pipe (21) is fixedly connected with the bottom of the third connecting pipe (21), a fourth tee joint (22) is fixedly arranged at the bottom end of the third connecting pipe (21), a fourth connecting pipe (23) is arranged at one side of the fourth tee joint (22), one end of the fourth connecting pipe (23) is provided with a water heater (24), the output end of the water heater (24) is provided with a first hot water output pipe (25), a fifth connecting pipe (26) is fixedly arranged on the other side of the fourth tee joint (22), one end of the fifth connecting pipe (26) is provided with an air heat exchanger (27), the output end of the top of the air heat exchanger (27) is provided with a second hot water output pipe (28), an air inlet pipe (29) is arranged at the input end of one side of the air heat exchanger (27), an air outlet pipe (30) is arranged at the output end of one side of the air heat exchanger (27).
2. The water thermostat control device of an engine test stand according to claim 1, characterized in that: the air inlet pipe (29) is internally provided with a third electromagnetic valve (31), the top of the air inlet pipe (29) is provided with a through air pipe (32), and a fourth electromagnetic valve (33) is arranged inside the through air pipe (32).
3. The water thermostat control device of an engine test stand according to claim 1, characterized in that: the water pump (4), the first water chiller (6), the first circulating pump (13), the second circulating pump (19), the second water chiller (14), the water heater (24) and the air heat exchanger (27) are all fixedly provided with supporting rods (34) at the bottoms, and the supporting rods (34) are fixedly connected with the base (1).
4. The water thermostat control device of an engine test stand according to claim 1, characterized in that: one end of each of the first hot water output pipe (25) and the second hot water output pipe (28) is communicated with the water inlet pipe (11).
5. The water thermostat control device of an engine test stand according to claim 1, characterized in that: and fifth electromagnetic valves (35) are arranged in the fourth connecting pipe (23) and the fifth connecting pipe (26).
6. The water thermostat control device of an engine test stand according to any one of claims 1 to 5, characterized in that: the water constant temperature control method of the engine test bed comprises the following specific steps:
the method comprises the following steps that firstly, a water inlet pipe (11) and a water outlet pipe (18) are communicated with a water inlet and a water outlet of an engine to be tested, an air inlet pipe (29) and an air outlet pipe (30) are communicated with an air outlet of the engine, when low-temperature control is needed, a water pump (4) is turned on, the water pump (4) conveys normal-temperature water in a water tank (3) to the interior of a first water cooler (6) for cooling, and then conveys the normal-temperature water to the interior of the water inlet pipe (11) through a first connecting pipe (7), so that the normal-temperature water is conveyed to the;
step two, the flow valve (9) detects the water delivery amount in real time, after the water delivery amount reaches a specified amount, the first electromagnetic valve (8) is opened to seal the flow valve (9), then the first circulating pump (13) is opened, the first circulating pump (13) conveys water in the water outlet pipe (18) from the internal circulation position of the engine to the second water chiller (14) for cooling, and then conveys the water to the internal part of the engine for use again, so that the effect of circular cooling is achieved;
step three, when the water needs to be directly heated, a second electromagnetic valve (16) is opened, the second electromagnetic valve (16) seals a second connecting pipe (15), then a second circulating pump (19) is opened, the second circulating pump (19) conveys the water in a water outlet pipe (18) from the internal circulation of the engine to the inside of a third connecting pipe (21), a fifth electromagnetic valve (35) in a fifth connecting pipe (26) is opened, the fifth connecting pipe (26) is closed, so that the water enters a water heater (24) through a fourth connecting pipe (23) to be heated, then the water heater (24) conveys the water heated to a certain temperature to the inside of a water inlet pipe (11) through a first hot water output pipe (25), and then the water flows into the engine again;
and step four, when the water needs to be indirectly heated, a second electromagnetic valve (16) in the fourth connecting pipe (23) is opened, the second electromagnetic valve (16) closes the fourth connecting pipe (23), then the water flows into the air heat exchanger (27), then high-temperature gas exhausted by the engine enters the air heat exchanger (27) and exchanges heat with the water in the air heat exchanger, then the water is conveyed into the water inlet pipe (11) through a second hot water output pipe (28), then the water flows into the engine again, and exhaust of the engine can be directly discharged through a straight-through air pipe (32).
7. The water constant temperature control method of the engine test bed according to claim 6, characterized in that: in the fourth step, the third electromagnetic valve (31) can be opened, the third electromagnetic valve (31) closes the air inlet pipe (29), and then the exhaust gas of the engine is discharged through the through air pipe (32), so that direct discharge can be performed, and the air heat exchanger (27) can not be used.
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| CN201910932289.3A CN110609579A (en) | 2019-09-29 | 2019-09-29 | Water constant temperature control method and device for engine test bed |
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| CN201910932289.3A CN110609579A (en) | 2019-09-29 | 2019-09-29 | Water constant temperature control method and device for engine test bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115167565A (en) * | 2022-07-18 | 2022-10-11 | 潍柴动力股份有限公司 | Temperature control device, method and equipment |
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| CN208705049U (en) * | 2018-09-30 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of engine decomposition method frictional work test dedicated water constant temperature system |
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