CN110763500B - Test bed and test method for air door performance test - Google Patents
Test bed and test method for air door performance test Download PDFInfo
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- CN110763500B CN110763500B CN201911065441.9A CN201911065441A CN110763500B CN 110763500 B CN110763500 B CN 110763500B CN 201911065441 A CN201911065441 A CN 201911065441A CN 110763500 B CN110763500 B CN 110763500B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
Abstract
The embodiment of the invention provides a test bed for testing an air door to be tested, which comprises: the device comprises a cavity, an airflow port, a guide plate, a heater, a stirrer, a sensor, a camera, a pressure release valve and a heat insulation layer, wherein when certain temperature and pressure conditions are formed in the cavity of the test bed, the performance test of the air door to be tested is carried out; meanwhile, the invention also provides a method for testing the performance of the air door, which creates a test environment by the test bed and simulates the standby working condition or the heat preservation working condition of the actual use of the heat exchanger so as to test the rotation condition of the baffle of the air door to be tested. The test bed provides an efficient simulation environment for the air door test, and is favorable for improving the test accuracy.
Description
Technical Field
The embodiment of the invention relates to air door performance testing of heat exchange equipment, in particular to a test bed and a test method for air door performance testing.
Background
The sodium-air heat exchanger is one of main devices of the reactor accident waste heat discharging system and is used for transferring the heat of sodium in an intermediate loop of the accident waste heat discharging system to air and taking away the reactor core waste heat by the air. Generally, a sodium-air heat exchanger is provided with an inlet air door and an outlet air door for controlling the circulation of air media, wherein the sodium media flow from top to bottom in a pipeline, the air flows from bottom to top, and the two media form reverse convection circulation, so that the waste heat of a reactor core is discharged.
The air inlet and outlet doors of the sodium-air heat exchanger are one of important structures for ensuring air heat exchange, so that the use reliability of the sodium-air heat exchanger needs to meet certain requirements. Generally, before the inlet and outlet air doors are normally put into use, the performance of the air doors needs to be tested under certain conditions, such as the adaptation of the air doors to factors such as temperature and the like, and the performance of the air doors such as operation flexibility and the like, so that the safety and the reliability of the air doors in the actual use process of the heat exchanger can be improved.
Disclosure of Invention
In order to solve at least one aspect of the above technical problems, embodiments of the present invention provide a test bed and a test method for testing performance of a damper, where the test bed is used to simulate an environment of a heat exchanger during actual use and provide a test environment for damper testing; the testing method is characterized in that the use condition of the air door is tested by opening or closing the air door under a testing environment; the test bed is simple in design structure, can meet the requirement of simulating an actual environment, and further performs testing through a testing method so as to improve the safety and reliability of the use of the air door.
According to an aspect of the present invention, there is provided a test stand for testing a damper to be tested, comprising: a chamber configured to provide a test space; the airflow port is arranged at one end of the cavity and used for controlling the air circulation in the cavity; the heater is arranged in the cavity and used for heating the air in the cavity; the stirrer is arranged opposite to the periphery of the heater and is used for enabling air in the cavity to form convection and enabling the temperature in the cavity to be uniform; the sensor is arranged in the cavity and used for measuring environmental parameters in the cavity; when certain temperature and pressure conditions are formed in the cavity of the test bed, the performance test of the air door to be tested is carried out; the air door to be tested is arranged in the cavity and close to the heater.
Further, the test bench still includes: the guide plate is arranged at one end of the cavity body close to the airflow port and used for guiding the air flowing in the cavity body; the camera is arranged at the other end of the cavity far away from the airflow port and used for monitoring the state of the air door to be detected in real time; the heat insulation layer is arranged on the outer wall of the cavity and used for heat insulation; and the pressure relief valve is arranged on the cavity and used for regulating and controlling the pressure parameters in the cavity.
Further, the heater has the function of automatic start-stop, and when the temperature in the cavity is higher than a set value, the heater is automatically closed; when the temperature in the cavity is lower than a set value, the heater is automatically started; the set value is set according to the temperature of the heat exchanger under the standby working condition or the heat preservation working condition.
According to another aspect of the present invention, there is provided a method for testing damper performance, comprising the steps of:
s1, placing the air door to be tested into the test bed;
s2, carrying out standby working condition or heat preservation working condition environment simulation on the test bed;
s3 testing the rotation of the baffle of the air door to be tested.
Further, the step S2 further includes:
s21, starting a heater and a stirrer, heating the gas in the cavity and enabling the gas to form convection, wherein when the cavity has a first temperature and a first pressure, the test bed is in a standby working condition;
s22, when the cavity has the second temperature and the second pressure, the test bed is in the heat preservation working condition.
Further, the step S3 further includes:
s31, when the test bed is in a standby working condition, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and S32, when the test bed is in a heat preservation working condition, the air door to be tested is continuously opened and closed, and the opening and closing time of the air door to be tested is recorded.
Further, the step S31 further includes:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
Further, the step S32 further includes:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
Compared with the prior art, the invention has at least one of the following beneficial effects:
(1) the test bed has simple structural design and flexible control mode, creates a high-efficiency simulation environment for the air door test, and is favorable for improving the accuracy and control of the test;
(2) according to the method for testing the performance of the air door, the actual use environment is simulated, so that the reliability of the test result is improved, and the test accuracy is improved; meanwhile, according to the test result, the defects of the air door in the using process can be clearly known, so that the structural design and the like of the air door can be improved or improved according to the test result, and the using safety and the reliability of the air door are improved.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 is a block diagram of a test stand for testing an inlet damper according to an exemplary embodiment of the present invention; and
FIG. 2 is a block diagram of a test stand for testing an outlet damper according to an exemplary embodiment of the present invention.
It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
In practical applications, the damper of the sodium-air heat exchanger may be set, for example, in a single-stage manner, and the outlet damper may be set in a double-stage manner. The structure of the damper may include, for example, a frame, a drive shaft, a damper, and an actuator; the baffle can rotate relative to the transmission shaft and can be fixed within the range of 0-90 degrees; the actuating mechanism has two functions of electric operation and manual operation.
When the air door is opened or closed, the opening or closing operation can be realized in two modes of electric operation and manual operation. When the manual mode is adopted for execution, the transmission shaft can be controlled by operating a hand wheel on the execution mechanism, so that the baffle plate rotates to open or close; when the electric mode is adopted for execution, a remote control device can be adopted to control a shaft position signal device attached to the execution mechanism, so that the transmission shaft is controlled to enable the baffle to rotate to open or close; no matter a manual or electric mode is adopted, the air door can be stopped at any angle within the range of 0-90 degrees through the air door opening adjusting device, and flexible control is achieved. The actuating mechanism is set to have electric and manual functions, when the power supply system is interrupted, the air door can be opened and closed manually, under the electric condition, the air door can be controlled to be opened and closed remotely, and the reliability and the flexibility of the operation of the air door are effectively improved.
The baffle of air door has insulation construction usually, can guarantee that the heat preservation and the leakproofness of air door are good.
The test bed provided by the embodiment of the invention can simulate the actual use environment of the sodium-air heat exchanger, so that the accuracy of the air door test is improved. Under the normal condition, the using environment conditions of the sodium-air heat exchanger comprise a standby working condition and a heat preservation working condition, wherein the standby working condition is the state of the sodium-air heat exchanger when the reactor normally operates (in the process of full power operation or power lifting), and in the state, the opening angle of an air door at an inlet and an air door at an outlet are adjusted, so that heat exchange with certain requirements is realized; the heat preservation working condition is that when the reactor is in a shutdown state, the sodium-air heat exchanger is in a state, and in the state, the air doors of the inlet and the outlet are in a closed state.
In addition, the cooling working condition belongs to a special condition of a standby working condition, namely under accident working conditions of external power failure, water supply interruption of all steam generators, earthquakes and the like, when the waste heat of the reactor cannot be normally discharged through the main heat transmission system, the reactor protection system automatically triggers all inlet and outlet air doors to be opened so as to realize heat exchange; if the automatic triggering fails, the inlet and outlet air doors are manually triggered to be fully opened by an operator.
Table 1 shows the corresponding condition parameters of the sodium-air heat exchanger under the rated standby condition; the reference can be provided for the simulation environment of the air door test according to the actual operation condition; the design temperature and the design pressure are the highest temperature and the highest pressure which can be borne by the test bed.
TABLE 1 technical parameter table of sodium-air heat exchanger (rated standby condition)
| Name (R) | Unit of | Numerical value |
| Heat exchange power | MW | 0.75 |
| Inlet temperature of sodium side | ℃ | 520 |
| Sodium side outlet temperature | ℃ | 458 |
| Air side inlet temperature | ℃ | 50 |
| Air side outlet temperature | ℃ | 507 |
| Design temperature | ℃ | 580 |
| Design pressure | MPa | 1.0 |
| Long run time, run time | Year of year | 40 |
| Number of cold and hot shutdown (number of start and stop) of reactor | Next time | 500 |
Referring to fig. 1, a test stand for testing a damper to be tested according to an embodiment of the present invention includes: a chamber 11 configured to provide a test space; the airflow port 12 is arranged at one end of the cavity 11 and is used for controlling the air circulation in the cavity; the heater 13 is arranged inside the cavity 11 and used for heating air in the cavity; the stirrer 14 is arranged opposite to the periphery of the heater 13 and is used for enabling air in the cavity to form convection and enabling the temperature in the cavity to be uniform; and a sensor 15 arranged in the cavity 11 for measuring environmental parameters in the cavity; when certain temperature and pressure conditions are formed in the cavity of the test bed, the performance test of the air door to be tested is carried out; the damper to be tested is disposed inside the chamber 11 and adjacent to the heater 13.
Further, the test bench still includes: a guide plate (not shown) disposed at one end of the chamber body near the air flow port 12 for guiding the air flow in the chamber body; the camera 16 is arranged at the other end of the cavity far away from the airflow port 12 and used for monitoring the state of the air door to be detected in real time; the heat insulation layer 17 is arranged on the outer wall of the cavity 11 and used for heat insulation; and the pressure relief valve 18 is arranged on the cavity 11 and used for regulating and controlling the pressure parameter in the cavity.
Referring to fig. 1, a test stand 100 for testing an inlet damper under test according to one embodiment of the present invention includes: the cavity 11 can provide a test environment for the performance test of the air door, namely, the environment of the air door in the actual use of the sodium-air heat exchanger is simulated; the outer wall of the cavity 11 is provided with a heat insulation layer 17 for heat insulation of the test environment and reducing the temperature loss in the cavity; an airflow port 12 is arranged at one end of the cavity 11, and before the test starts, the air circulation in the cavity is controlled by controlling the opening degree of the airflow port; in the whole test process, the airflow port 12 is completely closed, so that a sealed space is formed in the cavity of the test bed; based on the fact that the sodium-air heat exchanger has a high temperature between pipelines in the actual use process, in order to simulate the condition, a heater 13 is arranged inside the cavity 11 and used for heating the air medium in the cavity (because in the actual situation, the sodium-air heat exchanger takes away the heat of hot sodium through the flowing of the air medium), and in the heating process, in order to ensure that the air flowing can form convection, stirrers 14 are arranged around the heater 13, so that uniform heating can be realized while stirring, and the heating efficiency is improved; as for the number and position arrangement of the stirrers 14, as shown in fig. 1, the stirrers may be arranged at two ends of the cavity 11 around the heater 13, for example, 4 stirrers are provided in this embodiment, and it is understood that the number and position distribution of the stirrers may also be set according to actual needs; to further enhance the convection effect of the air in the cavity 11, a baffle (not shown) may be provided at an end of the cavity near the airflow opening 12 to cooperate with the agitator 14.
Further, when the test bed 100 simulates an actual working condition environment, certain temperature and pressure conditions need to be provided in the cavity 11, so that the control of the temperature and the pressure is crucial; a temperature sensor 1501 and a pressure sensor 1502 are arranged in the cavity 11, so that environmental parameters can be measured in real time to be adjusted in time, and the simulation accuracy of the test bed is ensured; the inlet air door to be tested is arranged at a position shown as F1 in FIG. 1, and for example, bolts can be used for fixedly mounting the air door to be tested, so that the air door to be tested can be stable in the test process; the temperature in the cavity 11 needs to be strictly controlled, so that a plurality of temperature sensors 1501 can be arranged around the damper to be measured, or a plurality of temperature sensors can be uniformly arranged in the cavity 11 as required, and when the temperature is measured, for example, a mode of averaging a plurality of measured values can be adopted; meanwhile, in order to ensure a good heat insulation effect, the structure of the air door to be tested has a certain heat insulation layer (the baffle of the air door usually adopts a double-layer baffle structure, and heat insulation materials are filled between the two layers of baffles), and the cavity 11 is internally provided with the site heat insulation of the position of the air door to be tested, namely before the test is started, the heat insulation layer is arranged on the outer wall of the cavity of the area where the air door to be tested is fixed, so that the heat insulation effect is further enhanced; the air door to be tested is provided with an actuating mechanism shaft temperature detection device Z for measuring the shaft temperature of the actuating mechanism and the temperature of a motor arranged on the actuating mechanism; further, for controlling the pressure factor in the cavity 11, real-time measurement is performed by the pressure sensor 1502, and the pressure range required to be achieved is regulated by the pressure relief valve 18; as shown in fig. 1, 2 pressure sensors 1502 are provided in the present embodiment, and are located between the heater 13 and the inlet damper position to be measured, but it is understood that the number and the location of the pressure sensors may be arranged according to actual needs; pressure relief valve 18 is disposed proximate to pressure sensor 1502; further, the other end of the cavity far away from the airflow port 12 is provided with a camera 16 for monitoring the state of the air door to be tested in real time, so as to observe and record the use condition of the air door to be tested.
Referring to fig. 2, a test stand 200 for testing an outlet damper to be tested according to another embodiment of the present invention includes: a bracket 21 for fixedly supporting the test bed 200, the chamber 22, the airflow port 23, a guide plate (not shown), a heater 24, a stirrer 25, a temperature sensor 2601, a pressure sensor 2602, a camera 27, an insulating layer 28 and a pressure release valve 29; wherein, each part of the test bed 200 has the same function as the test bed 100; the outlet air door to be detected is arranged at a position shown as F2 in fig. 2, an actuating mechanism shaft temperature detecting device Z is arranged on the outlet air door to be detected, and the outlet air door is of a double-section structure and controls the actuating mechanisms of the upper section of baffle plate and the lower section of baffle plate to be respectively provided with the shaft temperature detecting device Z.
The test bed 100 and the test bed 200 are arranged in different directions; the test bed 100 for testing the inlet air door is horizontally arranged, and correspondingly, the inlet air door to be tested is also horizontally arranged in the test bed 100; the test bed 200 for testing the outlet air door is vertically arranged, and correspondingly, the outlet air door to be tested is also vertically arranged in the test bed 200; this is because, in practical applications, the inlet damper is horizontally arranged in the heat exchanger, and the outlet damper is vertically arranged in the heat exchanger, and in order to improve the simulation accuracy, the arrangement orientations of the test stand 100, the inlet damper, and the test stand 200, and the outlet damper need to be consistent with those in practical use.
Referring to fig. 1 or fig. 2, further, in order to flexibly control the temperature variation in the cavity, the heater 13 or the heater 24 has an automatic on-off function, and when the temperature in the cavity is higher than a set value, the heater 13 or 24 is automatically turned off; when the temperature in the cavity is lower than a set value, the heater 13 or 24 is automatically started; wherein, the set value is set according to the temperature of the heat exchanger under the standby working condition or the heat preservation working condition. The heater carries out the comparison according to temperature measurement in the cavity and setting value, heats or stops heating automatically, can realize nimble control temperature, avoids appearing the structure of the air door that awaits measuring when the high temperature in the cavity simultaneously and causes the influence.
The test bed for testing the performance of the air door is simple in structural design and flexible in control mode, creates an efficient simulation environment for air door testing, and is favorable for improving the accuracy of testing and controlling.
There is also provided, in accordance with an embodiment of the present invention, a method for testing damper performance, including the steps of:
s1, placing the air door to be tested into the test bed of the above embodiment;
s2, carrying out standby working condition or heat preservation working condition environment simulation on the test bed;
s3 testing the rotation of the baffle of the air door to be tested.
In the step S1, when the inlet damper is tested, before the test, the inlet damper to be tested is placed at the position shown by F1 in fig. 1 and fixed; the specific operation is as follows: horizontally placing an inlet air door to be tested, namely, a baffle of the inlet air door is in a closed state (namely, the opening degree of the air door is 0 degrees), the baffle is vertical to the whole frame relative to the ground, and the baffle faces to an airflow port of the test bed; then, fixing the frame of the inlet air door by using bolts and the like, so that the inlet air door can be stably kept in the whole test process; in the test process, the baffle of import air door rotates and opens and shuts at 0 ~ 90 within range, and the frame of import air door remains stable throughout.
For the outlet air door, the outlet air door to be tested can be placed at the position shown as F2 in FIG. 2 and fixed; the specific operation is as follows: vertically placing an outlet air door to be tested, namely, enabling a baffle plate of the outlet air door to be in a closed state (namely, the opening degree of the air door is 0 degrees), enabling the baffle plate and the whole frame to be parallel relative to the ground, and enabling the baffle plate to face an air flow port of a test bed; then, fixing the frame of the outlet air door by using bolts and the like, so that the outlet air door can be stably kept in the whole test process; in the test process, the baffle of export air door rotates and opens and shuts at 0 ~ 90 within range, and the frame of export air door remains stable throughout. Because the outlet air door adopts a double-section baffle plate type structure, the upper and lower baffle plates are closed before the test and then placed, and in the test process, one of the baffle plates can be independently controlled to rotate or the two baffle plates can be simultaneously controlled to rotate.
In the step S2, the step of simulating the standby working condition or the heat preservation working condition environment of the test bed includes:
s21, starting a heater and a stirrer, heating the gas in the cavity and enabling the gas to form convection, wherein when the cavity has a first temperature and a first pressure, the test bed is in a standby working condition;
s22 when the cavity has the second temperature and the second pressure, the test bed is in the heat preservation working condition.
Wherein, in the initial state, the temperature in the cavity is normal temperature, and as the sodium-air heat exchanger has higher temperature in the actual use, the heater needs to be started to heat the cavity, and the stirrer is started at the same time to ensure uniform heating; with continuous heating, when the temperature and the pressure in the cavity reach set values, the heating can be stopped for heat preservation, so that the temperature of the test environment is kept stable; and controlling different temperature and pressure ranges according to different working conditions.
Further, the step of S3 includes:
s31, when the test bed is in a standby working condition, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
s32, when the test bed is in the heat preservation working condition, the air door to be tested is continuously opened and closed, and the opening and closing time of the air door to be tested is recorded.
The actuating mechanism based on the air door has two modes of electric actuation and manual actuation, and the opening and the closing of the air door can be operated by adopting electric actuation or manual actuation; in this way,
the S31 step may include:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
The S32 step may include:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
The actuating mechanism of the air door to be tested extends out of the cavity of the test bed along the axis where the transmission shaft is located, the actuating mechanism is provided with a hand wheel, and when the actuating mechanism needs to be manually controlled, an operator can control the actuating mechanism by rotating the hand wheel, so that the baffle of the air door to be tested rotates.
According to one embodiment of the present invention, a method for testing the performance of an inlet damper comprises the steps of:
(1) placing an inlet air door to be tested into a test bed 100 as shown in fig. 1; specifically, the glass is placed at a position F1 in the figure 1 and fixed; the specific operation is as follows: horizontally placing an inlet air door to be tested, namely, a baffle of the inlet air door is in a closed state (namely, the opening degree of the air door is 0 degrees), the baffle is vertical to the whole frame relative to the ground, and the baffle faces to an airflow port of the test bed; then, fixing the frame of the inlet air door by using bolts and the like, so that the inlet air door can be stably kept in the whole test process; in the test process, the baffle of the inlet air door rotates to be opened and closed within the range of 0-90 degrees, and the frame of the inlet air door is always kept stable and motionless; the air door of the inlet to be tested can be ensured to be stably upright in the whole testing process when the baffle plate of the inlet to be tested rotates;
(2) closing the airflow port 12 to form a closed environment in the test bed 100; the heater 13 is started to continuously heat the air medium in the cavity 11, the stirrer 14 is ensured to continuously stir, and the gas in the cavity forms convection and the temperature of each part is uniform under the combined action of the guide plates; according to the condition parameters when the sodium-air heat exchanger is in the standby working condition, for example, the first temperature is set to 520 ℃, the first pressure is set to be 0.1MPa at normal pressure, the temperature sensor 1501 and the pressure sensor 1502 are used for carrying out real-time measurement in the heating process of the heater 13, when the measured temperature is higher than the set value, the heater 13 executes the automatic closing function to complete the heating, and when the measured temperature is lower than the set value, the heater 13 continuously heats; meanwhile, the pressure range is regulated and controlled by controlling the pressure relief valve 18;
(3) when the test bed 100 is in a standby working condition environment, testing the use condition of the inlet air door;
a electric execution mode:
the actuating mechanism receives the indication signal and controls the baffle to rotate by operating the remote control equipment and the like.
In the initial state, the baffle of the inlet air door to be tested is in a closed state (namely the opening of the air door is 0 degree), and after the test is started, the execution mechanism is operated to enable the baffle to be opened and closed in a stroke of 0-90 degrees relative to the transmission shaft;
continuously opening and closing the inlet air door to be tested under the same operating condition, and respectively recording the time required by the inlet air door to be tested to be opened from 0-90 degrees and closed from 90-0 degrees; opening and closing the test for 10 times respectively, and recording the time; in the testing process, the rotation condition of the baffle of the inlet air door to be tested is monitored in real time through the camera 16, and whether the phenomenon of blocking exists or not is recorded;
table 2 shows the continuous operation time record of the inlet damper to be measured under the standby condition, and from the results of multiple measurements, the inlet damper can be flexibly and continuously operated at a higher temperature (520 ℃), has no pause phenomenon, and has higher use reliability;
TABLE 2 Inlet air door opening and closing time under Standby working conditions (electric execution mode)
(4) The temperature in the cavity of the test bed 100 is reduced, and when the temperature is reduced from 520 ℃ to 220-250 ℃, the heat preservation state is maintained in the cavity (in the actual situation, when a reactor is in a cold shutdown state, in order to prevent sodium in the heat exchange tube from condensing (the melting point of sodium is 97.81 ℃), the heat exchanger needs to be in the heat preservation state of electric heating);
for example, the second temperature is set to be 250 ℃, the second pressure is 0.1MPa at normal pressure, and at the moment, the test bed is in a heat preservation working condition;
when the test bed 100 is in a heat preservation working condition environment, testing the use condition of the inlet air door;
a electric execution mode:
in the initial state, the baffle of the inlet air door to be tested is in a closed state (namely the opening of the air door is 0 degree), and after the test is started, the execution mechanism is operated to enable the baffle to be opened and closed in a stroke of 0-90 degrees relative to the transmission shaft;
continuously opening and closing the inlet air door to be tested under the same operating condition, and respectively recording the time required by the inlet air door to be tested to be opened from 0-90 degrees and closed from 90-0 degrees; opening and closing the test for 10 times respectively, and recording the time; in the testing process, the rotation condition of the baffle of the inlet air door to be tested is monitored in real time through the camera 16, and whether the phenomenon of blocking exists or not is recorded;
table 3 shows the continuous operation time record of the inlet air door to be tested under the heat preservation working condition, and comparing table 2 with table 3, it can be seen that the inlet air door is transited from the standby working condition to the heat preservation working condition, that is, the inlet air door can still keep good operation condition after being cooled from higher temperature, which shows that the inlet air door has the capability of bearing temperature change, has stronger adaptability, can be operated normally and continuously under different working conditions, and thus has higher use reliability;
in addition, when the test is finished and the temperature in the cavity of the test bed is reduced to the normal temperature, the structure of the air door is checked, whether the air door has obvious thermal expansion deformation and the like is observed, the influence of factors such as the temperature and the like on the structure of the air door is considered according to the whole test process, whether the structural design of the air door has defects is judged, whether the actual requirements can be met or not is judged, and therefore the structure of the air door is adjusted or improved according to a feedback result;
TABLE 3 Inlet air door on-off time under thermal insulation working condition (electric execution mode)
(5) When the inlet air door to be tested is manually controlled, the test result is as follows (the method is the same as the above, only the execution mode of the air door baffle is changed):
b manual execution mode:
the operation is performed by rotating a hand wheel of an actuating mechanism extending out of the cavity of the test bed.
The number of repeated tests on and off, respectively, was 5.
Table 4 is the continuous operation time record of the inlet damper to be tested under the standby condition;
table 5 shows the continuous operation time record of the inlet damper to be measured under the thermal insulation condition;
TABLE 4 Inlet throttle on-off time under Standby conditions (Manual execution mode)
TABLE 5 Inlet throttle on-off time under thermal insulation conditions (Manual execution mode)
As can be seen from tables 4 and 5, when the manual execution mode is adopted, the opening and closing of the inlet damper is easier to control, and the time required for opening and closing is shortened compared with the electric execution mode; therefore, even if the electric structure of the actuating mechanism of the inlet air door fails, the manual operation can be adopted for control, and the use safety and reliability of the air door are further guaranteed.
According to another embodiment of the invention, the service performance of the outlet air door is tested, the testing method is basically the same as that of the inlet air door, and the difference is that the outlet air door adopts a double-section baffle plate type structure, so that the rotation conditions of the upper and lower baffle plates are respectively tested.
The results of the tests on the outlet damper are shown in tables 6, 7, 8 and 9 below.
TABLE 6 open/close time of outlet air door under standby condition (electric execution mode)
TABLE 7 open/close time of outlet air door under heat preservation working condition (electric execution mode)
TABLE 8 open/close time of outlet air door under standby condition (Manual execution mode)
TABLE 9 open/close time of outlet air door under heat preservation condition (Manual execution mode)
As can be seen from the time recorded in tables 6-9, the upper and lower baffles of the outlet damper can continuously and stably operate in both the electric execution mode and the manual execution mode, so that the operation flexibility is high; meanwhile, the time for opening or closing a single baffle of the inlet air door is compared with the time for opening or closing an upper baffle (or a lower baffle) of the outlet air door, and the time for opening or closing the single baffle is found to be shorter, because in the actual use process of the heat exchanger, the air medium needs to be controlled to quickly enter a pipeline to exchange heat with sodium, the heat exchange operation needs to be carried out within a certain time, the outlet air door cannot be opened immediately, the heat exchange is waited to be finished, the outlet air door is controlled to be opened again, the hot air is discharged, and therefore, the time for opening the inlet air door is controlled to be finished within a shorter time.
Additionally, when the air door to be tested is operated in an electric execution mode, the arrangement of a motor for controlling the operation of the air door needs to be considered at the same time; in practical situations, under the condition that the heat exchange system is not influenced to carry out heat exchange, the operating environment temperature of the air door motor needs to be ensured to be lower than 60 ℃, so that the motor is arranged at a certain distance from the position of the air door; according to the motor of the embodiment of the invention, the motor is arranged at the tail end of the actuating mechanism, meanwhile, the shaft temperature detection device arranged on the actuating mechanism can measure the temperature of the shaft of the actuating mechanism and the temperature of the motor, and for example, an infrared thermometer can be adopted to measure the temperature of the motor. In the test process, the temperature of the motor under different working condition test conditions is measured, and the result shows that the temperature measurement value is about 25 ℃, so that the operation environment temperature of the air door motor can be lower than 60 ℃, and the practical application requirement is met. In addition, the temperature test condition of the actuating mechanism is lower than 60 ℃, and the manual operation of an operator is not influenced.
According to the air door performance testing method provided by the embodiment of the invention, under different working conditions, the air door baffle is operated to rotate in different control modes, and the influence of environmental factors such as temperature, pressure and the like on the structure and the running condition of the air door is inspected, so that on one hand, the reliability of a test result is improved by simulating an actual use environment, and on the other hand, whether the design of the air door meets requirements, such as adaptability to different environments, use safety and the like, is obtained through testing; meanwhile, according to a test result, a perfecting or improving measure can be provided for the air door before the air door is actually used, for example, a structure, a material or a process with strong environment resistance is provided for poor adaptability, so that the quality of an air door product is improved to meet the actual use requirement, the reliability of the air door in the actual use process is improved, and the overall working efficiency and the use effect of a system where the air door is located are improved.
It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (8)
1. A test stand for testing a damper to be tested, comprising:
a chamber configured to provide a test space;
the airflow port is arranged at one end of the cavity and used for controlling the air circulation in the cavity;
the heater is arranged in the cavity and used for heating the air in the cavity;
the stirrer is arranged opposite to the periphery of the heater and is used for enabling air in the cavity to form convection and enabling the temperature in the cavity to be uniform; and
the sensor is arranged in the cavity and used for measuring environmental parameters in the cavity;
the shaft temperature detection device is arranged on the execution mechanism of the air door to be detected and used for measuring the temperature of a motor, and the motor controls the operation of the air door to be detected;
when certain temperature and pressure conditions are formed in the cavity of the test bed, the performance test of the air door to be tested is carried out; the air door to be tested is arranged in the cavity and close to the heater, and the air door to be tested is an air door of the sodium-air heat exchanger.
2. The test stand of claim 1, further comprising:
the guide plate is arranged at one end of the cavity body close to the airflow port and used for guiding the air flowing in the cavity body;
the camera is arranged at the other end of the cavity far away from the airflow port and used for monitoring the state of the air door to be detected in real time;
the heat insulation layer is arranged on the outer wall of the cavity and used for heat insulation;
and the pressure relief valve is arranged on the cavity and used for regulating and controlling the pressure parameters in the cavity.
3. The test stand of claim 1,
the heater has the function of automatic start-stop, and when the temperature in the cavity is higher than a set value, the heater is automatically closed; when the temperature in the cavity is lower than a set value, the heater is automatically started;
the set value is set according to the temperature of the heat exchanger under the standby working condition or the heat preservation working condition.
4. A method for testing the performance of a damper comprises the following steps:
s1, placing the damper to be tested into the test bed according to any one of claims 1-3;
s2, carrying out standby working condition or heat preservation working condition environment simulation on the test bed;
s3, testing the rotation condition of the baffle of the air door to be tested, wherein the air door to be tested is the air door of the sodium-air heat exchanger.
5. The damper performance testing method of claim 4, wherein the step S2 further comprises:
s21, starting a heater and a stirrer, heating the gas in the cavity and enabling the gas to form convection, wherein when the cavity has a first temperature and a first pressure, the test bed is in a standby working condition;
s22, when the cavity has the second temperature and the second pressure, the test bed is in the heat preservation working condition.
6. The damper performance testing method of claim 4, wherein the step S3 further comprises:
s31, when the test bed is in a standby working condition, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and S32, when the test bed is in a heat preservation working condition, the air door to be tested is continuously opened and closed, and the opening and closing time of the air door to be tested is recorded.
7. The damper performance testing method of claim 6, wherein the step of S31 further comprises:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
8. The damper performance testing method of claim 6, wherein the step of S32 further comprises:
electrically controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested;
and manually controlling an actuating mechanism of the air door to be tested, continuously opening and closing the air door to be tested, and recording the opening and closing time of the air door to be tested.
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