CN112326232B - Examination test device and method for ultrahigh-temperature high-pressure stop valve - Google Patents
Examination test device and method for ultrahigh-temperature high-pressure stop valve Download PDFInfo
- Publication number
- CN112326232B CN112326232B CN202011313729.6A CN202011313729A CN112326232B CN 112326232 B CN112326232 B CN 112326232B CN 202011313729 A CN202011313729 A CN 202011313729A CN 112326232 B CN112326232 B CN 112326232B
- Authority
- CN
- China
- Prior art keywords
- pressure
- stop valve
- temperature
- test piece
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Abstract
The invention discloses an examination test device and method for an ultrahigh-temperature high-pressure stop valve, wherein a stop valve test piece with the characteristics consistent with the characteristics of an actual ultrahigh-temperature high-pressure stop valve is designed, and the test device is matched with an oxygen-enriched burner, an adjustable spray pipe, a rectifying measuring pipe, an exhaust pressure-supplementing spray pipe, a temperature measuring point and a pressure measuring point to examine the stop valve test piece under the high-temperature low-pressure working condition, the high-temperature high-pressure and high-temperature low-pressure switching working condition and the high-temperature high-pressure working condition, so that the oxidation resistance, the thermal protection reliability, the high-temperature high-pressure sealing and opening and closing response characteristics of the high-temperature high-pressure stop valve under different heat load types are effectively simulated.
Description
Technical Field
The invention relates to a valve checking test device and a valve checking test method, in particular to a checking test device and a checking test method for a high-temperature and high-pressure valve.
Background
In a high-temperature heat accumulating type heater system, an ultrahigh-temperature high-pressure stop valve is used for realizing the air inlet and exhaust control of the preheating and operation of a heater, has a direct control effect on the operation of the system, is one of key devices of a pure air high-enthalpy wind tunnel of a scramjet engine, and has the advantages of severe working conditions, high environmental temperature of 1900K and high environmental pressure of 6 MPa.
The working principle of the high-temperature and high-pressure stop valve is as follows: before the wind tunnel experiment starts, high-temperature gas in the heater is cut off by means of an ultrahigh-temperature high-pressure stop valve, so that conditions are provided for pressurization and heat storage of the heat storage type heater; when the experiment begins, the ultrahigh-temperature high-pressure stop valve responds to the opening action rapidly, and the air flow flows into the experiment section through the ultrahigh-temperature high-pressure stop valve, the mixing section, the rectifier, the spray pipe and the like. As a direct execution component for experiment control, the ultrahigh-temperature high-pressure stop valve plays a decisive role in success or failure of an experiment, the working environment is harsh, the development and implementation difficulty is high, and weak links which are easy to appear are many, so that the high-temperature valve is required to have the characteristics of high temperature resistance, high pressure resistance, rapid action response, high reliability and the like.
Because the ultrahigh-temperature high-pressure stop valve works in a high-temperature, high-pressure and oxygen-enriched environment, the problems of ablation, oxidation and the like of the valve easily occur; the sealing material of the valve is not easy to replace, so that the problem of sealing failure is easy to occur; the high-pressure environment and the large temperature difference between the internal environment and the external environment can cause the deformation of a valve structure and cause overlarge pressure loss; when the valve is used, the influence of particles and dust of a heat accumulator in the heat accumulating type heater on the valve is difficult to evaluate, and the valve has the problem of thermal protection when the heat accumulating type heater is preheated and the ultrahigh-temperature high-pressure stop valve works in a high-temperature low-pressure thermal radiation environment for a long time.
Because the above problems may occur when the ultrahigh-temperature and high-pressure stop valve is used, whether the ultrahigh-temperature and high-pressure stop valve meets the technical index requirements of temperature, pressure, response time, leakage rate, cooling reliability and the like needs to be checked, and therefore, a set of examination test device is urgently needed to be established to simulate the required high-temperature and high-pressure environment by a test means so as to examine the closing sealing performance, the opening and closing response performance, the thermal protection performance and the like of the ultrahigh-temperature and high-pressure stop valve in the high-temperature and high-pressure environment.
Disclosure of the invention
The technical problem to be solved by the invention is as follows: the device and the method are used for simulating a high-temperature high-pressure oxygen-enriched complex environment under the real working condition of the valve, the test process is gradual, safe and controllable, the simulation requirements of different heat load types borne by the high-temperature high-pressure valve in the closing and opening states and the action process are met, and the oxidation resistance, the thermal protection reliability, the high-temperature high-pressure sealing and opening and closing response characteristics of the high-temperature high-pressure valve can be examined.
The technical solution of the invention is as follows:
the invention provides an examination test device for an ultrahigh-temperature high-pressure stop valve, which comprises a stop valve test piece, an oxygen-enriched combustor, a rectification measuring pipe, an exhaust pressure-supplementing spray pipe, an adjustable spray pipe, a temperature measuring point and a pressure measuring point, wherein the oxygen-enriched combustor is arranged on the stop valve test piece;
the stop valve test piece comprises a shell and a valve core assembly;
the gas inlet of the shell is connected with the oxygen-enriched combustor through a rectifying measuring tube, and the gas outlet of the shell is connected with the exhaust pressure-supplementing spray pipe;
the valve core assembly is arranged on the shell, and the valve core in the valve core assembly moves in a reciprocating manner to open or close the gas flow channel in the stop valve test piece;
the diameter and the airflow flowing form of the airflow channel of the stop valve test piece and the actual ultrahigh-temperature high-pressure stop valve are consistent, and the size and the material of the valve core are kept consistent;
the oxygen-enriched combustor adopts an adjustable pintle jet structure and is used for providing oxygen-enriched fuel gas with different power and different flow;
the outer side of the exhaust pressure-supplementing spray pipe is provided with an annular air cavity, and the side wall of the exhaust pressure-supplementing spray pipe is provided with a plurality of small holes which are communicated with the annular air cavity and are uniformly distributed along the circumferential direction; the annular air cavity is communicated with an external air source;
the adjustable spray pipe is arranged on the rectifying measuring pipe and is communicated with the rectifying measuring pipe, and an outlet of the adjustable spray pipe is provided with a plug with a throttling hole;
the temperature measuring point and the pressure measuring point are arranged on the rectifying measuring tube;
the oxygen-enriched combustor, the rectifying measuring pipe and the shell are all coated with water-cooling jackets.
Further, the valve core assembly comprises a cylinder body, a piston rod, a valve core and a sealing element;
the cylinder body is fixedly connected with the shell, the piston rod is provided with a valve core, and the sealing element is arranged between the valve core and the shell;
the valve core comprises an inner pipe, an outer pipe, a cooling water inlet and a cooling water outlet; the front end and the rear end of the outer pipe are both closed ends, the rear end of the inner pipe is fixedly connected with the rear end of the outer pipe, and the front end of the inner pipe is an open end;
an external cooling water flowing chamber is formed between the inner pipe and the outer pipe, and an internal cooling water flowing chamber is formed in the inner pipe;
the cooling water inlet is communicated with the internal cooling water flowing cavity, and the cooling water outlet is communicated with the external cooling water flowing cavity.
Further, the sealing element is filled with a sealing ring or a graphite material.
Further, the front end of the outer tube is spherical.
Further, the water-cooling jacket comprises an inner shell, an outer shell, a water inlet and a water outlet; the outer wall of the inner shell is provided with an annular groove and a straight groove;
the two annular grooves are respectively arranged at the front end and the rear end of the outer wall of the inner shell;
the straight grooves are distributed along the circumferential direction and are mutually isolated;
the two annular grooves at the front end and the rear end are communicated through a plurality of straight grooves, so that a cooling water channel is formed;
the outer shell is coaxially coated outside the inner shell and used for sealing the cooling water channel;
the water inlet and the water outlet are respectively communicated with the two annular grooves.
Furthermore, the flange plates are adopted between the oxygen-enriched combustor and the rectifying measuring pipe, between the fuel gas inlet of the shell and the rectifying measuring pipe, and between the fuel gas outlet of the shell and the exhaust pressure-supplementing spray pipe to be hermetically connected in a spigot matching mode.
Further, the exhaust pressure-supplementing spray pipe comprises a cylindrical section and a conical section which are sequentially connected along the flowing direction of the fuel gas.
Further, the adjustable nozzle comprises a cylindrical section and a conical section which are connected in sequence along the flowing direction of the fuel gas.
Based on the structural introduction of the examination test device, the process of the examination test by adopting the examination test device is described, and the examination test device specifically comprises the following steps:
step 1: checking under the working conditions of high temperature and low pressure;
step 1.1: the method comprises the following steps that a gas flow channel in a stop valve test piece is in an open state, an adjustable spray pipe is in a small-area throttling state, an oxygen-enriched combustor is adjusted to work at low power to form small-flow high-temperature low-pressure oxygen-enriched gas, a small part of the gas is discharged through the adjustable spray pipe, the rest of the gas passes through the gas flow channel and then is mixed with normal-temperature air at an exhaust pressure-supplementing spray pipe and then is discharged, whether the stop valve test piece has a leakage phenomenon or not is observed in the working process, and the temperature of a cooling water outlet in the stop valve test piece is measured; after the test, the check valve test piece is checked, and whether the valve core and the inner cavity of the shell have ablation and oxidation traces or not is observed;
step 1.2: the mode of the step 1.1 is adopted to carry out a plurality of tests, the test time is gradually prolonged each time, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the stop valve test piece working for a long time under the working condition of high temperature and low pressure are examined;
step 2: checking under the working condition of switching between high temperature and high pressure and high temperature and low pressure;
step 2.1: on the basis of the step 1, the valve core in the valve core assembly is made to circularly reciprocate to enable the gas channel to be in a switching state of closing or opening, the gas channel is switched between a high-pressure state and a low-pressure state, and the working pressure of normal-temperature air in the exhaust pressure-supplementing spray pipe is kept slightly lower than the pressure in the gas channel at the moment; in the action process, the opening and closing time of the valve core assembly is measured, whether the air leakage phenomenon occurs in the stop valve test piece or not is observed, the temperature of a cooling water outlet of the stop valve test piece is measured, the test is finished after one-time switching is finished, the stop valve test piece is checked, and whether the valve core and the inner cavity of the shell are ablated or not is observed;
step 2.2: performing multiple tests under different gas flow and pressure conditions by adopting the mode of the step 2.1, and checking the opening and closing response characteristics, sealing performance, cooling performance, ablation resistance and oxidation resistance of the valve core assembly of the stop valve test piece under the switching working condition of high temperature, high pressure and high temperature and low pressure;
and step 3: checking under the working conditions of high temperature and high pressure;
step 3.1: the gas flow passage in the stop valve test piece is in a closed state, the exhaust pressure-supplementing spray pipe stops injecting normal-temperature air, the oxygen-enriched combustor starts to burn, the gas flow and the gas temperature are gradually increased, and the generated gas is discharged through the adjustable spray pipe; observing whether the stop valve test piece has air leakage or not in the running process, measuring the temperature of a cooling water outlet of the stop valve test piece, checking the stop valve test piece after one-time test, and observing whether the valve core and the inner cavity of the shell are ablated or not;
step 3.2: and (3) replacing the plugs at the outlets of the adjustable spray pipes, wherein the throttling holes of each plug are different in size, so that the working pressure of the test device is changed, then, according to the mode of the step 3.1, a plurality of tests are carried out, whether the air leakage phenomenon occurs in the test piece of the stop valve or not is observed, the temperature of the cooling water outlet of the test piece of the stop valve is measured, the test piece of the stop valve is checked after each test is finished, whether the inner cavity of the valve core and the inner cavity of the shell are ablated or not is observed, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the test piece of the stop valve under different gas powers and different pressure conditions are checked.
The invention has the beneficial effects that:
1. the invention adopts a stop valve test piece simulation actual product and a test bed constructed by an oxygen-enriched combustor, a rectification measuring pipe, an exhaust pressure-supplementing spray pipe and an adjustable spray pipe, realizes the state simulation of the ultra-high temperature and high pressure valve under different complex working conditions, provides different oxygen-enriched fuel gas heat load types borne by the valve in the closing and opening states and action processes, and provides an examination test system with simple structure and easy operation for the examination of the oxidation resistance, the heat protection reliability, the high-temperature and high-pressure sealing and the opening and closing response characteristics of the ultra-high temperature and high pressure valve.
2. According to the examination test device, the adjustable spray pipe is used for adjusting the throttle area of the throat part of the outlet, the adjustable spray pipe is matched with the pintle oxygen-enriched burner, the working pressure of the test device is adjustable, the opening direction of the valve core of the high-temperature and high-pressure valve is consistent with the flow direction of oxygen-enriched gas, the valve opening response time is prolonged, and the angle valve flow passage form and the water cooling jacket are favorable for thermal protection of the whole test device.
3. According to the examination test device, the exhaust pressure-supplementing spray pipe is arranged at the rear end of the high-temperature and high-pressure valve, and before the valve is opened, high-pressure air forms a uniform and stable pressure environment behind the valve core, so that strong impact at the moment of opening the valve is prevented, the heat flux density is reduced, and the high-temperature and high-pressure air serves as cooling gas for protecting a subsequent discharge pipeline.
Drawings
FIG. 1 is a schematic structural diagram of a test piece of a stop valve in the embodiment when the test piece is opened;
fig. 2 is a schematic structural diagram of the shut-off valve test piece of the embodiment when closed.
FIG. 3 is a schematic view of the structure of a water-cooling jacket.
Fig. 4 is a sectional view taken along the line a of fig. 3.
Fig. 5 is a sectional view taken along line B of fig. 3.
The reference numbers are as follows:
1-stop valve test piece, 2-oxygen-enriched burner, 3-rectifying measuring tube, 4-exhaust pressure-supplementing spray tube, 5-adjustable spray tube, 6-temperature measuring point, 7-pressure measuring point, 8-shell, 9-valve core component, 10-annular air cavity, 11-small hole, 12-plug, 13-water cooling jacket, 14-cylinder, 15-piston rod, 16-valve core, 17-sealing element, 18-inner tube, 19-outer tube, 20-cooling water inlet, 21-cooling water outlet, 22-inner shell, 23-outer shell, 24-water inlet, 25-water outlet, 26-annular groove, 27-straight groove and 28-cooling water channel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides an examination test device and method for an ultrahigh-temperature high-pressure stop valve, which form high-temperature high-pressure oxygen-enriched complex environments of different working application systems of the valve by designing a stop valve test piece with the characteristics consistent with the characteristics of an actual ultrahigh-temperature high-pressure stop valve and matching with a variable-power oxygen-enriched combustor, an adjustable spray pipe, a rectifying measuring pipe, an exhaust pressure-supplementing spray pipe and the adjustable spray pipe, thereby realizing the simulation requirements of different heat load types borne by the high-temperature high-pressure valve in the closing and opening states and the action process, and meeting the examination requirements of the oxidation resistance, the heat protection reliability, the high-temperature high-pressure sealing and the opening and closing response characteristics of the high-temperature high-pressure valve.
Examples
As shown in fig. 1, the embodiment provides an ultra-high temperature and high pressure stop valve examination test device, which includes a stop valve test piece 1, an oxygen-enriched combustor 2, a rectification measuring pipe 3, an exhaust pressure-supplementing nozzle 4, an adjustable nozzle 5, a temperature measuring point 6 and a pressure measuring point 7;
the diameter and the airflow flowing form of the airflow channel of the stop valve test piece 1 and the actual ultrahigh-temperature high-pressure stop valve are consistent, the size and the material of the valve core are consistent, and the stop valve test piece comprises a shell 8 and a valve core assembly 9;
a gas inlet of the shell 8 is connected with the oxygen-enriched combustor 1 through a rectifying measuring pipe 3, and a gas outlet of the shell 8 is connected with an exhaust pressure-supplementing spray pipe 4, so that a gas channel A is formed;
the valve core assembly 9 is arranged on the shell 8, and the valve core in the valve core assembly 9 moves in a reciprocating manner to open or close an air flow channel in the stop valve test piece;
the oxygen-enriched combustor 2 adopts an adjustable pintle injection structure, provides oxygen-enriched gas with different power, different flow and different temperature, and provides a heat source for check of a stop valve test piece;
an annular air cavity 10 is arranged on the outer side of the exhaust pressure-supplementing spray pipe 4, and a plurality of small holes 11 which are communicated with the annular air cavity and are uniformly distributed along the circumferential direction are arranged on the side wall of the exhaust pressure-supplementing spray pipe 4; the annular air cavity 10 is communicated with an external air source; before the valve is opened, the high-pressure air forms an even and stable pressure environment behind the valve core, so that the strong impact and the reduced heat flux density at the moment of opening the test piece of the stop valve are prevented. The exhaust pressure-supplementing spray pipe in the embodiment comprises a cylindrical section and a conical section which are sequentially connected along the flow direction of fuel gas; the annular air cavity is arranged on the outer side of the cylindrical section, and the small holes are formed in the cylindrical section;
the adjustable spray pipe 5 is arranged on the rectifying measuring pipe 3 and is communicated with the rectifying measuring pipe 3, and a plug 12 with a throttling hole is arranged at the outlet of the adjustable spray pipe 5, has a flow dividing function and is used for controlling the working pressure of a gas channel; in this embodiment, the cylinder section and the cone section are connected in order along the gas flow direction.
The temperature measuring point 6 and the pressure measuring point 7 are arranged on the rectifying measuring tube 3 and are used for measuring the temperature and pressure states of the gas channel;
the oxygen-enriched combustor 2, the rectifying measuring pipe 3 and the shell 8 are coated with water-cooling jackets 13 for water-cooling each structure.
As shown in fig. 3 to 5, the water-cooling jacket 13 has the following specific structure: the water-cooling jacket 13 comprises an inner shell 22, an outer shell 23, a water inlet 24 and a water outlet 25; the outer wall of the inner shell 24 is provided with an annular groove 26 and a straight groove 27; two annular grooves 26 are formed at the front end and the rear end of the outer wall of the inner shell 22; the plurality of straight grooves 27 are distributed along the circumferential direction, and the plurality of straight grooves 27 are mutually isolated; the two annular grooves 26 at the front and rear ends are communicated through a plurality of straight grooves 27 to form a cooling water passage 28; the outer shell 23 is coaxially coated outside the inner shell 22 and used for sealing the cooling water channel 28; the water inlet 24 and the water outlet 25 are respectively communicated with the two annular grooves 26. When the device is used, cooling water firstly enters any one annular groove 26 from the water inlet 24 and flows out from the water outlet 25 of the other annular groove 26 after being shunted by the straight grooves 27, so that the oxygen-enriched combustor 2, the rectifying and measuring pipe 3 and the stop valve test piece 1 are fully cooled.
In the present embodiment, the spool assembly 9 includes a cylinder 14, a piston rod 15, a spool 16, and a seal member 17; the cylinder 14 is fixedly connected with the housing 8, the piston rod 15 is provided with a valve core 16, and the sealing element 17 is arranged between the valve core 16 and the housing 8 (in the embodiment, the sealing element 17 is made of graphite filling material, and of course, other sealing manners, such as a sealing ring, can be adopted);
the valve core 16 comprises an inner pipe 18, an outer pipe 19, a cooling water inlet 20 and a cooling water outlet 21; the front end and the rear end of the outer tube 19 are both closed ends, the rear end of the inner tube 18 is fixedly connected with the rear end of the outer tube 19, and the front end of the inner tube 18 is an open end; an external cooling water flowing chamber is formed between the inner tube 18 and the outer tube 19, and an internal cooling water flowing chamber is formed in the inner tube 18; the cooling water inlet 20 communicates with the internal cooling water flow chamber, and the cooling water outlet 21 communicates with the external cooling water flow chamber. In this embodiment, the outer tube front end is spherical, is favorable to the thermal protection.
In addition, in order to ensure the air tightness, in the embodiment, flanges are adopted to hermetically connect between the oxygen-enriched combustor 2 and the rectifying measuring pipe 3, between the gas inlet of the shell 5 and the rectifying measuring pipe 3, and between the gas outlet of the shell 8 and the exhaust pressure-supplementing spray pipe 4 in a spigot matching manner.
As shown in fig. 1, the stop valve test piece 1 is in an open state, when the oxygen-enriched combustor 2 works at different gas flows and temperatures, a small amount of oxygen-enriched gas flows out of the adjustable spray pipe 5, a large amount of oxygen-enriched gas passes through the gas channel a and is mixed with normal-temperature air and discharged from the exhaust pressure-supplementing spray pipe 4, at the moment, the stop valve test piece 1 is in a high-temperature low-pressure working state, heat load mainly comprises heat convection and heat conduction, the thermal environment of a high-temperature high-pressure valve in the preheating process of a heat accumulating type heater system is simulated, and the cooling performance and the oxidation resistance of the valve in the long-time preheating process are examined.
As shown in fig. 2, the action stop valve test piece 1 is closed, the oxygen-enriched gas is discharged from the adjustable nozzle 5 of the rectifying measurement pipe 3, the gas channel a of the stop valve test piece 1 is in a high-temperature and high-pressure state, the thermal load is mainly heat radiation and heat conduction, the thermal environment of the high-temperature and high-pressure valve in the pressurization process of the heat storage type heater system is simulated, and the high-temperature and high-pressure cooling performance and the sealing performance of the valve are checked.
The opening and closing states of the stop valve test piece 1 are repeatedly switched, the high-low pressure state of the test device is switched back and forth in the opening or closing process, the stop valve test piece 1 is in the high-temperature and high-pressure working state of air flow circulation, the thermal load is mainly the convective heat transfer and the heat transfer of high-density heat flow, the thermal environment of the high-temperature and high-pressure valve in the working process of the heat accumulating type heater system is simulated, and the quick opening and closing response time characteristic, the high-heat-flow protection performance and the sealing performance of the valve are examined.
The specific working process of the examination test device is as follows:
step 1: checking under the working conditions of high temperature and low pressure;
step 1.1: the gas flow channel A in the stop valve test piece 1 is in an open state, the adjustable spray pipe 5 is in a small-area throttling state, the adjustable oxygen-enriched combustor 2 works at low power to form small-flow high-temperature low-pressure oxygen-enriched gas, a small part of the gas is discharged through the adjustable spray pipe, the rest of the gas is mixed with normal-temperature air at the exhaust pressure-supplementing spray pipe 4 after passing through the gas flow channel A and then discharged, whether the stop valve test piece has a leakage phenomenon or not is observed in the working process, and the temperature of a cooling water outlet in the stop valve test piece is measured; after the test, the check valve test piece is checked, and whether the valve core and the inner cavity of the shell have ablation and oxidation traces or not is observed;
step 1.2: the mode of the step 1.1 is adopted to carry out a plurality of tests, the test time is gradually prolonged each time, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the stop valve test piece working for a long time under the working condition of high temperature and low pressure are examined;
step 2: checking under the working condition of switching between high temperature and high pressure and high temperature and low pressure;
step 2.1: on the basis of the step 1, the valve core in the valve core assembly 9 is made to circularly reciprocate to make the gas channel in a switching state of closing or opening, the gas channel A is switched between a high-pressure state and a low-pressure state, and the working pressure of normal-temperature air in the exhaust pressure-supplementing spray pipe 4 is kept slightly lower than the pressure in the gas channel A; in the action process, the opening and closing time of the valve core assembly 9 is measured, whether the air leakage phenomenon occurs in the test piece of the stop valve or not is observed, the temperature of a cooling water outlet of the test piece of the stop valve is measured, the test is finished after one-time switching is finished, the test piece of the stop valve is checked, and whether the valve core and the inner cavity of the shell are ablated or not is observed;
step 2.2: performing multiple tests under different gas flow and pressure conditions by adopting the mode of the step 2.1, and checking the opening and closing response characteristics, sealing performance, cooling performance, ablation resistance and oxidation resistance of the valve core assembly of the stop valve test piece under the switching working condition of high temperature, high pressure and high temperature and low pressure;
and step 3: checking under the working conditions of high temperature and high pressure;
step 3.1: the gas flow passage A in the stop valve test piece 1 is in a closed state, the exhaust pressure-supplementing spray pipe 4 stops injecting normal-temperature air, the oxygen-enriched combustor 2 starts to burn, the gas flow and the gas temperature are gradually increased, and the generated gas is discharged through the adjustable spray pipe 5; observing whether the stop valve test piece has air leakage or not in the running process, measuring the temperature of a cooling water outlet of the stop valve test piece, checking the stop valve test piece after one-time test, and observing whether the valve core and the inner cavity of the shell are ablated or not;
step 3.2: and (3) replacing the plugs 12 at the outlets of the adjustable spray pipes, wherein the orifice size of each plug is different, so that the working pressure of the test device is changed, then, according to the mode of the step 3.1, a plurality of tests are carried out, whether the air leakage phenomenon occurs in the test piece of the stop valve or not is observed, the temperature of the cooling water outlet of the test piece of the stop valve is measured, the test piece of the stop valve is checked after each test is finished, whether the inner cavity of the valve core and the inner cavity of the shell are ablated or not is observed, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the test piece of the stop valve under the conditions of different gas powers and different pressures are checked.
Test verification
The stop valve test piece of a certain ultrahigh-temperature high-pressure stop valve is manufactured, the stop valve test piece examination test is carried out by using the device, 53 working condition points are carried out totally, the accumulated examination time is 11.7 hours, the simulation working condition can reach 1800K and 4.3MPa at most, and the work application of the ultrahigh-temperature high-pressure stop valve is effectively simulated.
The above description of the embodiments and the accompanying drawings represent preferred embodiments of the present invention, and those skilled in the art will appreciate that various additions, modifications and substitutions are possible, in accordance with different design requirements and design parameters, without departing from the scope of the present invention as defined in the accompanying claims.
Claims (9)
1. The utility model provides an ultra-high temperature high pressure stop valve examination test device which characterized in that: the device comprises a stop valve test piece, an oxygen-enriched combustor, a rectification measuring tube, an exhaust pressure-supplementing spray tube, an adjustable spray tube, a temperature measuring point and a pressure measuring point;
the stop valve test piece comprises a shell and a valve core assembly;
the gas inlet of the shell is connected with the oxygen-enriched combustor through a rectifying measuring tube, and the gas outlet of the shell is connected with the exhaust pressure-supplementing spray pipe;
the valve core assembly is arranged on the shell, and the valve core in the valve core assembly moves in a reciprocating manner to open or close the gas flow channel in the stop valve test piece;
the diameter and the airflow flowing form of the airflow channel of the stop valve test piece and the actual ultrahigh-temperature high-pressure stop valve are consistent, and the size and the material of the valve core are kept consistent;
the oxygen-enriched combustor adopts an adjustable pintle jet structure and is used for providing oxygen-enriched fuel gas with different power and different flow;
the outer side of the exhaust pressure-supplementing spray pipe is provided with an annular air cavity, and the side wall of the exhaust pressure-supplementing spray pipe is provided with a plurality of small holes which are communicated with the annular air cavity and are uniformly distributed along the circumferential direction; the annular air cavity is communicated with an external air source;
the adjustable spray pipe is arranged on the rectifying measuring pipe and is communicated with the rectifying measuring pipe, a plug with a throttling hole is arranged at the outlet of the adjustable spray pipe, the plug at the outlet of the adjustable spray pipe is replaced, and the throttling hole of each plug is different in size, so that the working pressure of the testing device is changed;
the temperature measuring point and the pressure measuring point are arranged on the rectifying measuring tube;
the oxygen-enriched combustor, the rectifying measuring pipe and the shell are all coated with water-cooling jackets.
2. The ultra-high temperature and high pressure stop valve assessment test device according to claim 1, characterized in that: the valve core assembly comprises a cylinder body, a piston rod, a valve core and a sealing element;
the cylinder body is fixedly connected with the shell, the piston rod is provided with a valve core, and the sealing element is arranged between the valve core and the shell;
the valve core comprises an inner pipe, an outer pipe, a cooling water inlet and a cooling water outlet; the front end and the rear end of the outer pipe are both closed ends, the rear end of the inner pipe is fixedly connected with the rear end of the outer pipe, and the front end of the inner pipe is an open end;
an external cooling water flowing chamber is formed between the inner pipe and the outer pipe, and an internal cooling water flowing chamber is formed in the inner pipe;
the cooling water inlet is communicated with the internal cooling water flowing cavity, and the cooling water outlet is communicated with the external cooling water flowing cavity.
3. The ultra-high temperature and high pressure stop valve assessment test device according to claim 2, characterized in that: the sealing element is filled with a sealing ring or graphite material.
4. The ultra-high temperature and high pressure stop valve assessment test device according to claim 3, characterized in that: the front end of the outer pipe is spherical.
5. The ultra-high temperature and high pressure stop valve assessment test device according to any one of claims 1 to 4, wherein: the water-cooling jacket comprises an inner shell, an outer shell, a water inlet and a water outlet; the outer wall of the inner shell is provided with an annular groove and a straight groove;
the two annular grooves are respectively arranged at the front end and the rear end of the outer wall of the inner shell;
the straight grooves are distributed along the circumferential direction and are mutually isolated;
the two annular grooves at the front end and the rear end are communicated through a plurality of straight grooves, so that a cooling water channel is formed;
the outer shell is coaxially coated outside the inner shell and used for sealing the cooling water channel;
the water inlet and the water outlet are respectively communicated with the two annular grooves.
6. The ultra-high temperature and high pressure stop valve assessment test device according to claim 5, characterized in that: between oxygen boosting combustor and rectification survey buret, between the gas entry and the rectification survey buret of casing, all adopt the ring flange to connect with spigot complex mode sealing between the gas export of casing and the exhaust pressure compensating spray tube.
7. The ultra-high temperature and high pressure stop valve assessment test device according to claim 6, characterized in that: the exhaust pressure-supplementing spray pipe comprises a cylindrical section and a conical section which are sequentially connected along the flow direction of fuel gas.
8. The ultra-high temperature and high pressure stop valve assessment test device according to claim 7, characterized in that: the adjustable spray pipe comprises a cylindrical section and a conical section which are sequentially connected along the flow direction of fuel gas.
9. An examination test method for an ultrahigh-temperature high-pressure stop valve is characterized in that the examination test device of claim 1 is adopted, and the examination test method comprises the following specific execution steps:
step 1: checking under the working conditions of high temperature and low pressure;
step 1.1: the method comprises the following steps that a gas flow channel in a stop valve test piece is in an open state, an adjustable spray pipe is in a small-area throttling state, an oxygen-enriched combustor is adjusted to work at low power to form small-flow high-temperature low-pressure oxygen-enriched gas, a small part of the gas is discharged through the adjustable spray pipe, the rest of the gas passes through the gas flow channel and then is mixed with normal-temperature air at an exhaust pressure-supplementing spray pipe and then is discharged, whether the stop valve test piece has a leakage phenomenon or not is observed in the working process, and the temperature of a cooling water outlet in the stop valve test piece is measured; after the test, the check valve test piece is checked, and whether the valve core and the inner cavity of the shell have ablation and oxidation traces or not is observed;
step 1.2: the mode of the step 1.1 is adopted to carry out a plurality of tests, the test time is gradually prolonged each time, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the stop valve test piece working for a long time under the working condition of high temperature and low pressure are examined;
step 2: checking under the working condition of switching between high temperature and high pressure and high temperature and low pressure;
step 2.1: on the basis of the step 1, the valve core in the valve core assembly is made to circularly reciprocate to enable the gas channel to be in a switching state of closing or opening, the gas channel is switched between a high-pressure state and a low-pressure state, and the working pressure of normal-temperature air in the exhaust pressure-supplementing spray pipe is kept slightly lower than the pressure in the gas channel at the moment; in the action process, the opening and closing time of the valve core assembly is measured, whether the air leakage phenomenon occurs in the stop valve test piece or not is observed, the temperature of a cooling water outlet of the stop valve test piece is measured, the test is finished after one-time switching is finished, the stop valve test piece is checked, and whether the valve core and the inner cavity of the shell are ablated or not is observed;
step 2.2: performing multiple tests under different gas flow and pressure conditions by adopting the mode of the step 2.1, and checking the opening and closing response characteristics, sealing performance, cooling performance, ablation resistance and oxidation resistance of the valve core assembly of the stop valve test piece under the switching working condition of high temperature, high pressure and high temperature and low pressure;
and step 3: checking under the working conditions of high temperature and high pressure;
step 3.1: the gas flow passage in the stop valve test piece is in a closed state, the exhaust pressure-supplementing spray pipe stops injecting normal-temperature air, the oxygen-enriched combustor starts to burn, the gas flow and the gas temperature are gradually increased, and the generated gas is discharged through the adjustable spray pipe; observing whether the stop valve test piece has air leakage or not in the running process, measuring the temperature of a cooling water outlet of the stop valve test piece, checking the stop valve test piece after one-time test, and observing whether the valve core and the inner cavity of the shell are ablated or not;
step 3.2: and (3) replacing the plugs at the outlets of the adjustable spray pipes, wherein the throttling holes of each plug are different in size, so that the working pressure of the test device is changed, then, according to the mode of the step 3.1, a plurality of tests are carried out, whether the air leakage phenomenon occurs in the test piece of the stop valve or not is observed, the temperature of the cooling water outlet of the test piece of the stop valve is measured, the test piece of the stop valve is checked after each test is finished, whether the inner cavity of the valve core and the inner cavity of the shell are ablated or not is observed, and the sealing performance, the cooling performance, the ablation resistance and the oxidation resistance of the test piece of the stop valve under different gas powers and different pressure conditions are checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313729.6A CN112326232B (en) | 2020-11-20 | 2020-11-20 | Examination test device and method for ultrahigh-temperature high-pressure stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011313729.6A CN112326232B (en) | 2020-11-20 | 2020-11-20 | Examination test device and method for ultrahigh-temperature high-pressure stop valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112326232A CN112326232A (en) | 2021-02-05 |
| CN112326232B true CN112326232B (en) | 2021-09-03 |
Family
ID=74321875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011313729.6A Active CN112326232B (en) | 2020-11-20 | 2020-11-20 | Examination test device and method for ultrahigh-temperature high-pressure stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112326232B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3616070B2 (en) * | 2002-04-30 | 2005-02-02 | 三菱重工業株式会社 | Gas temperature non-contact measuring device |
| JP4586209B2 (en) * | 2004-10-07 | 2010-11-24 | 独立行政法人 宇宙航空研究開発機構 | Water-cooled high-temperature valve and combustion test apparatus using the same |
| US7958777B1 (en) * | 2008-10-07 | 2011-06-14 | Florida Turbine Technologies, Inc. | Thermal mechanical fatigue test rig |
| CN102393315A (en) * | 2011-12-02 | 2012-03-28 | 南京航空航天大学 | Rapid aging experiment system of three-way catalytic converter |
| CN104655416A (en) * | 2015-02-11 | 2015-05-27 | 合肥通用机械研究院 | Skid-mounted device for testing lives of small-bore gauge valves under high-temperature and high-pressure conditions |
| CN105651809A (en) * | 2015-12-31 | 2016-06-08 | 中国人民解放军国防科学技术大学 | Experimental device for particle combustion under high speed air flow |
| CN108254130B (en) * | 2017-12-30 | 2020-09-22 | 北京化工大学 | Wind tunnel device for continuous high-temperature sealing performance test |
| CN108776020B (en) * | 2018-03-08 | 2020-09-08 | 西北工业大学 | Test system for heat storage and heating of hollow brick |
| CN109060879B (en) * | 2018-08-28 | 2021-01-29 | 西安近代化学研究所 | Ultrahigh-speed ammunition throat liner ablation performance testing device and testing method |
-
2020
- 2020-11-20 CN CN202011313729.6A patent/CN112326232B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112326232A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111305974B (en) | Multifunctional integrated combustion assembly testing device | |
| DE4342572C1 (en) | Exhaust system for a turbocharged internal combustion engine | |
| CN111006841B (en) | Wide-area air inlet pressure regulating system for hypersonic wind tunnel | |
| CN111963337B (en) | Direct connection hot test system and hot test method for oxygen-enriched afterburning engine thrust chamber | |
| CN112576414B (en) | Liquid rocket engine thrust chamber filling test device and method and simulation criterion | |
| CN112179664B (en) | Adjustable low-pressure ignition experimental system for researching sub-super mixed flow | |
| CN112326232B (en) | Examination test device and method for ultrahigh-temperature high-pressure stop valve | |
| CN115875673A (en) | Pulse combustion wind tunnel hydrogen-oxygen combustion heater applied to high-temperature air incoming flow | |
| CN109580228A (en) | The cold test run pilot system of solid propellant rocket | |
| CN112628026B (en) | Hot test device for real supply condition of gas-gas thrust chamber injector | |
| CN207297311U (en) | Test device and testboard bay | |
| CN112461888B (en) | High-temperature and high-pressure examination test device and method for heat storage hollow brick and furnace lining | |
| CN113310697B (en) | Debugging system and method for anti-cavity-crossing high-temperature gas generating device | |
| CN217111442U (en) | Gas heater test bench | |
| CN104062123A (en) | Simulating device for on-rocket liquid-hydrogen temperature zone cold-helium heater | |
| CN114165363B (en) | Thrust room test device with multi-working-condition optimization function | |
| CN207181049U (en) | Pilot combustion channel for combustion gas turbine | |
| CN116044613A (en) | Extrusion test run system and method for liquid oxygen kerosene gas generator | |
| CN113175394B (en) | Hydrogen-oxygen rocket engine dynamic combustion stability identification test system and method | |
| CN115575075A (en) | Hydrogen fuel injector applied to high-temperature gas inflow condition | |
| CN114198511A (en) | Double-pulse solid rocket engine high-altitude simulation test quick non-return device | |
| CN110940525B (en) | Blending device of multi-strand high-temperature hot gas and cold air for engine test bed | |
| CN112964427A (en) | Fuel nozzle and main pipe combined sealing test device and method | |
| CN113567141A (en) | Distortion generating device and simulation method thereof and pressure distortion characteristic test system | |
| CN213842882U (en) | Pressure-bearing test device for cartridge receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |