CN114136650A - Gas-liquid two-phase flow mixing test box device - Google Patents
Gas-liquid two-phase flow mixing test box device Download PDFInfo
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- CN114136650A CN114136650A CN202111308687.1A CN202111308687A CN114136650A CN 114136650 A CN114136650 A CN 114136650A CN 202111308687 A CN202111308687 A CN 202111308687A CN 114136650 A CN114136650 A CN 114136650A
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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
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Engines (AREA)
Abstract
The invention belongs to the technical field of aero-engine tests, and relates to a gas-liquid two-phase flow mixing test box device. The mixing box is positioned at an inlet of each oil return stage of the lubricating oil pump and consists of a mixing box main body, a high-temperature lubricating oil atomization spraying part and a high-temperature gas spraying part, lubricating oil with constant temperature and constant pressure is sent into high-temperature lubricating oil atomization spraying devices of each stage of the pump under the control of a power pump, a pipeline heater, a regulating valve and the like, and the spraying effect which is relatively close to the actual working condition can be simulated through effective combination of lubricating oil nozzle groups.
Description
Technical Field
The invention belongs to the technical field of aero-engine tests, and relates to a gas-liquid two-phase flow mixing test box device capable of completing a gas-liquid two-phase flow mixing test under the conditions of high temperature and high pressure.
Background
In an aircraft lubricating oil system, a lubricating oil pump assembly is one of the core devices thereof. In the past, when the performance test of the lubricating oil pump assembly is carried out, the lubricating oil pump is often operated in a high-temperature pure oil state due to the limitation of the capability of test equipment. But the actual working conditions are as follows: the high-temperature gas-liquid two-phase flow enters the oil return stage of the lubricating oil pump. The pure oil condition is used for testing, the actual working condition cannot be simulated, and the applicability of test data is reduced.
In order to realize the generation of gas-liquid two-phase flow at the inlet of the lubricating oil pump, an oil-gas mixing system is a core component of the lubricating oil pump. The conventional mixing box structure has the following problems: 1. the lubricating oil nozzle is fixed knot constructs, hardly produces the effect of spraying that is close with operating condition through a nozzle, and the process of changing the nozzle is comparatively complicated, need pull down the upper cover of mixing box, and the side can be changed, and test efficiency is lower. 2. The gas injection system is relatively original, high-pressure gas is directly injected into the mixing box through the box wall, and the mixing box is free of a gas diffusion structure and cannot be fully mixed with lubricating oil. 3. The mixing box is of an all-metal structure, and the oil accumulation condition in the mixing box cannot be observed fully.
Disclosure of Invention
The purpose of the invention is: the gas-liquid two-phase flow mixing test box device solves the problem that performance test conditions of the lubricating oil pump are inconsistent with actual working conditions, and therefore applicability of test results is improved.
In order to solve the technical problem, the technical scheme of the invention is as follows:
a gas-liquid two-phase flow mixing test box device comprises: the mixing box comprises a nozzle mounting plate 1, a mixing box top flange 3, a high-temperature-resistant explosion-proof glass cover 4, a screw connecting assembly 5, a mixing box bottom flange 6, a bottom end enclosure 7, an air inlet pipe assembly 8, an annular air jet pipe 9, a confluence outlet pipe 10, a safety valve 11 and an atomizing nozzle 13, wherein the mixing box top flange 3, the high-temperature-resistant explosion-proof glass cover 4, the mixing box bottom flange 6 and the bottom end enclosure 7 are connected into a main body of the mixing box through a plurality of screw connecting assemblies 5 and high-temperature-resistant sealing structures; nozzle mounting panel 1 is fixed on the upper portion of mixing box top flange 3, 1 left side of nozzle mounting panel is provided with horizontal blind hole, 1 lower surface of nozzle mounting panel is provided with a plurality of nozzle mounting holes, a plurality of atomizing nozzle 13 are fixed in the nozzle mounting hole, intake pipe subassembly 8 inserts mixing box inside and welds with bottom head 7, intake pipe subassembly 8 includes two hollow gas outlets, the lower part symmetry trompil of annular jet-propelled pipe 9 welds on two hollow gas outlets of intake pipe subassembly 8, bottom head 7 below is provided with the opening, the vertical welding of confluence outlet pipe 10 is on the below opening of bottom head 7, relief valve 11 sets up on mixing box top flange 3, prevent that the incasement pressure is too high and produce the explosion hidden danger.
Further, a plurality of nozzle mounting holes on the nozzle mounting plate 1 are linearly distributed.
Furthermore, the annular gas ejector 9 is formed by welding two DN25 stainless steel semicircular tube structures formed by pipe benders.
Furthermore, a plurality of gas injection holes are uniformly distributed on the annular gas injection pipe.
Further, the gas injection holes have a hole depth direction perpendicular to the wall surface of the tube at a position 1/2 in the horizontal direction inside the upper surface of the annular gas injection tube 9.
Further, the high-temperature resistant and explosion-proof glass cover 4 is resistant to 1050 ℃ and 2 MPa.
Further, the annular gas lance 9 is located at three fifths of the height of the main body of the mixing box.
Further, a manual pressure regulating valve 12 arranged on the top flange 3 of the blending box is further included for manually and rapidly controlling the pressure change in the box.
Technical effects of the invention
The gas-liquid two-phase flow mixing test box device can simulate the actual working conditions in the lubricating oil and high-temperature gas aero-engine to the maximum extent; debugging time and model changing time of different products are reduced, and working efficiency is improved; the whole blending process is easy to observe, and abnormal conditions in the test process can be found conveniently in the first time.
Drawings
FIG. 1 is a schematic structural diagram of a gas-liquid two-phase flow mixing test box device of the invention;
FIG. 2 is a structural sectional view of a gas-liquid two-phase flow mixing test box device of the present invention;
FIG. 3 is a schematic diagram of the operation of the gas-liquid two-phase flow mixing test box device of the present invention;
FIG. 4 is a schematic structural view of a nozzle mounting plate of the gas-liquid two-phase flow mixing test box device of the present invention;
FIG. 5 is a schematic view of the annular gas lance configuration of the gas-liquid two-phase flow admixture test box apparatus of the present invention;
FIG. 6 is a schematic structural view of a high temperature resistant explosion-proof glass cover of the gas-liquid two-phase flow mixing test box device of the present invention;
FIG. 7 is a schematic view of the gas lance configuration of the gas-liquid two-phase flow admixture test chamber apparatus of the present invention;
the mixing box comprises a nozzle mounting plate 1, a nozzle base 2, a mixing box top flange 3, a high-temperature-resistant explosion-proof glass cover 4, a screw connecting assembly 5, a mixing box bottom flange 6, a bottom end enclosure 7, an air inlet pipe assembly 8, an annular air jet pipe 9, a confluence outlet pipe 10, a safety valve 11, a manual pressure regulating valve 12 and an atomizing nozzle 13.
Detailed Description
The mixing test box structure simulating gas-liquid two-phase flow in the aircraft engine casing is positioned at the inlet of each oil return stage of the lubricating oil pump, lubricating oil with constant temperature and constant pressure is sent into high-temperature lubricating oil atomizing and spraying devices of each stage of the pump under the control of a power pump, a pipeline heater, a regulating valve and the like, and the spraying effect which is closer to the actual working condition can be simulated through the effective combination of the lubricating oil nozzle groups. This blending box comprises three major parts: mixing box main part, high temperature lubricating oil atomizing sprinkler, high temperature gas injection apparatus.
The following detailed description is made with reference to the accompanying drawings.
The components and the connection structure of the device are shown in figures 1 and 2, a top flange 3 of the mixing box, a high-temperature-resistant explosion-proof glass cover 4, a bottom flange 6 of the mixing box and a bottom end enclosure 7 form a main body of the mixing box through a plurality of screw connecting assemblies 5 and a high-temperature-resistant sealing structure; the nozzle mounting plate 1 and the nozzle base 2 are mounted on the upper part of the flange 3 at the top of the mixing box through a plurality of hexagon socket head bolts and high-temperature-resistant sealing gaskets, and a plurality of atomizing nozzles 13 are fastened on the lower part of the nozzle mounting plate 1 through a threaded structure to jointly form a high-temperature lubricating oil atomizing and spraying device; after the air inlet pipe assembly 8 is inserted into a proper position inside the mixing box, the air inlet pipe assembly and the bottom end enclosure 7 are connected into a whole through welding, and after holes are formed in two ends of the annular air injection pipe 9, the air inlet pipe assembly and the bottom end enclosure are symmetrically welded on two hollow air outlets of the air inlet pipe assembly 8 to form the high-temperature gas injection device. The gas and liquid which are fully mixed in the mixing box enter the inlet of the aviation engine lubricating oil pump through a mixed flow outlet pipe 10. The safety valve 11 is used for ensuring that the pressure in the tank is not too high to cause explosion hidden danger, and the manual pressure regulating valve 12 is used for manually and rapidly controlling the pressure change in the tank.
A bottom flange 6 and a bottom end enclosure 7 of the blending box form a lower end cover of the blending box by a method of full welding and then finish machining, and form a lower end cover structure of the blending box after being welded with a confluence outlet pipe 10; and then the mixing box main body is formed by a mixing box top flange 3, a high-temperature-resistant explosion-proof glass cover 4, 12M 22-2.5 screw connecting assemblies 5 and a high-temperature-resistant sealing gasket made of polytetrafluoroethylene materials. The main body of the mixing box is used for accommodating and discharging mixed gas-liquid two-phase flow and observing the mixing process.
The effect of nozzle base 2 is under the prerequisite that does not reduce mixing box top flange 3 intensity, for nozzle mounting panel 1 provides reliable threaded connection hole site, nozzle base 2 welds in the upper portion of mixing box top flange 3, nozzle mounting panel 1 is through a plurality of hexagon socket head cap screw and the fastening of high temperature resistant sealed pad and nozzle base 2 on, the atomizing nozzle 13 of a plurality of quantity passes through NPT1/4 screw structure fastening in nozzle mounting panel 1 lower part, high temperature lubricating oil atomizing sprinkler has been constituteed jointly. The number of the installation positions of the nozzle installation plate 1 is 7, and when a certain seat is not provided with a nozzle, the nozzle installation plate can be plugged by a plug. The selection of the nozzle is based on the following principle: firstly, selecting a nozzle with a better atomization effect; and secondly, the inner diameter of the opening of the nozzle is reasonably selected according to the flow of the lubricating oil, so that the pressure in front of the nozzle and the flow flowing into the mixing box simultaneously meet the test requirements.
In the process of debugging the nozzle combination, the nozzles and the mounting plate can be completely taken out only by detaching 6 socket head cap screws on the nozzle mounting plate, and the nozzle mounting part on the mounting plate adopts a uniform thread specification, so that the nozzle is very convenient to replace.
The high-temperature lubricating oil atomization spraying device has the effect that the combination of the atomization nozzles is reasonably configured, so that the pressure in front of the nozzles and the flow flowing into the mixing box simultaneously meet the test requirements.
Fig. 7 shows an air inlet pipe assembly 8, which is a one-to-many hollow pipe structure, and has an air inlet end and a plurality of air outlet ends, as shown in fig. 7, the left lower end is the air inlet end, and the other two ports are the air outlet ends, and pass through the bottom end enclosure 7, and after being inserted into a suitable position inside the mixing box, the air inlet pipe assembly and the bottom end enclosure 7 are connected into a whole by welding, and after holes are formed at the two ends of the annular air injection pipe 9, the air inlet pipe assembly is symmetrically welded on the two hollow air outlets of the air inlet pipe assembly 8, so as to form a high-temperature gas injection device.
Furthermore, the annular gas injection pipe 9 is located at about three fifths of the height of the main body of the mixing box, and the specific height needs to be referred to the injection angle of the nozzles and the arrangement sequence of the nozzles so as to achieve the best mixing effect. The intake pipe assembly 8 may also adopt a structure in which a plurality of branches are symmetrically arranged according to the requirements of different intake air amounts.
Through the design of the unique annular gas ejector pipe with the two ends for gas inlet, the problem that the gas ejection amount of the traditional gas ejector pipe is attenuated along with the increase of the gas source distance is solved, the gas injection process is more uniform, and the oil-gas mixing effect is more sufficient.
The safety valve 11 is used for ensuring that the pressure in the tank is not too high to cause explosion hidden danger, and the manual pressure regulating valve 12 is used for manually and rapidly controlling the pressure change in the tank.
The pressure resistance index of the blending box is 0.8MPa, the temperature index is 250 ℃, in order to ensure the reliability of the blending box, after the first assembly, the pressure is maintained for 30min by using water with the pressure of 1.2MPa at normal temperature, if no abnormal leakage exists, the pressure is maintained for 30min by using hot oil with the temperature of 220 ℃ for another time, and the abnormal leakage is detected. The blending box passing the warm-pressing test can be used.
As shown in FIG. 3, the operation of the blender box is as follows:
firstly, the tested product works in a pure oil state, reaches the rotating speed required to be tested and works stably;
completely opening the mixing box oil path inlet regulating valve to generate maximum lubricating oil flow;
thirdly, switching an inlet flow conversion valve to connect the product inlet with a mixed flow outlet of the mixing box, and enabling the lubricating oil in the mixing box to enter the product inlet at the moment;
gradually opening the gas path inlet regulating valve of the mixing box to make the gas enter the mixing box;
regulating the flow rate of the lubricating oil and the pressure in the tank to be near target values through respective flow control devices of an oil path and a gas path;
stabilizing the temperature of the lubricating oil and the gas near the target value through respective temperature closed-loop control devices of an oil path and a gas path;
and seventhly, finely adjusting each parameter until the state of the test requirement is reached.
FIG. 4 is a view of the nozzle mounting plate with high temperature oil entering through the inlet fitting from the left side of the part; the nozzles of various specifications are connected with the mounting plate through seven NPT1/4 thread structures, and the lubricating oil atomization spraying effect capable of simulating the internal conditions of the aircraft engine to the maximum extent is generated through different nozzle combinations.
FIG. 5 is a circular gas ejector tube formed by welding two semicircular stainless steel tubes formed by tube bender DN25, test gas is injected into the circular gas ejector tube through two symmetrical pipelines, 20 gas tubes with diameter of 20 are uniformly distributed on the circular gas ejector tube
The air injection holes are perpendicular to the normal plane in the hole depth direction, located at the 1/2 position on the inner side of the upper surface of the annular air injection pipe, and are symmetrical at two ends, so that the phenomenon of uneven air injection is effectively avoided.
If the gas output can not meet the requirements of specific products, the number and the aperture of the gas injection holes can be properly adjusted; if two air inlets can not meet the requirement of air input quantity, enough air inlets can be opened at symmetrical positions, but the number of the air inlets is at least 2.
FIG. 6 shows a high temperature resistant and explosion proof glass cover, the upper temperature limit is 1050 ℃, the pressure resistance is 2MPa, and the intuitiveness of the internal condition of the mixing box is effectively improved on the premise of ensuring the safety of the test.
The advantages of this mixing box do:
the method can simulate the actual working condition in the engine to the maximum extent.
Secondly, the high-temperature gas can be more fully mixed with the atomized lubricating oil, the oil-gas mixing proportion is improved, and the mixing effect is guaranteed.
And thirdly, the mixing condition in the box can be observed conveniently.
Claims (8)
1. A gas-liquid two-phase flow mixing test box device is characterized by comprising: the mixing box comprises a nozzle mounting plate (1), a mixing box top flange (3), a high-temperature-resistant explosion-proof glass cover (4), a screw connecting assembly (5), a mixing box bottom flange (6), a bottom end enclosure (7), an air inlet pipe assembly (8), an annular air jet pipe (9), a confluence outlet pipe (10), a safety valve (11) and an atomizing nozzle (13), wherein the mixing box top flange (3), the high-temperature-resistant explosion-proof glass cover (4), the mixing box bottom flange (6) and the bottom end enclosure (7) are connected into a main body of the mixing box through a plurality of screw connecting assemblies (5) and a high-temperature-resistant sealing structure; nozzle mounting panel (1) is fixed on the upper portion of mixing box top flange (3), nozzle mounting panel (1) left side is provided with horizontal blind hole, nozzle mounting panel (1) lower surface is provided with a plurality of nozzle mounting holes, a plurality of atomizing nozzle (13) are fixed in the nozzle mounting hole, air intake pipe subassembly (8) insert mixing box inside and with bottom head (7) welding, air intake pipe subassembly (8) are including two hollow gas outlets, the lower part symmetry trompil of annular jet-propelled pipe (9) welds on two hollow gas outlets of air intake pipe subassembly (8), bottom head (7) below is provided with the opening, the vertical welding of confluence outlet pipe (10) is on the below opening of bottom head (7), relief valve (11) set up on mixing box top flange (3), prevent that the incasement pressure is too high and produce explosion hidden danger.
2. The gas-liquid two-phase flow mixing test box device according to claim 1, wherein the plurality of nozzle mounting holes on the nozzle mounting plate (1) are linearly distributed.
3. The gas-liquid two-phase flow mixing test box device according to claim 1, wherein the annular gas spraying pipe (9) is formed by welding two DN25 stainless steel semicircular pipe structures formed by pipe benders.
4. The gas-liquid two-phase flow mixing test box device according to claim 1, wherein a plurality of gas injection holes are uniformly distributed on the annular gas injection pipe.
5. The gas-liquid two-phase flow mixing test box device according to claim 4, wherein the hole depth direction of the gas injection holes is perpendicular to the tube wall surface and is located at 1/2 in the horizontal direction inside the upper surface of the annular gas injection tube (9).
6. The gas-liquid two-phase flow mixing test box device according to claim 1, wherein the high temperature resistant and explosion proof glass cover (4) is resistant to 1050 ℃ and 2 MPa.
7. The gas-liquid two-phase flow mixing test box device according to claim 1, wherein the annular gas lance (9) is located at three fifths of the height of the main body of the mixing box.
8. The gas-liquid two-phase flow mixing test box device according to claim 1, further comprising a manual pressure regulating valve (12) arranged on the mixing box top flange (3) for manually and rapidly controlling the pressure change in the box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111308687.1A CN114136650A (en) | 2021-11-05 | 2021-11-05 | Gas-liquid two-phase flow mixing test box device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111308687.1A CN114136650A (en) | 2021-11-05 | 2021-11-05 | Gas-liquid two-phase flow mixing test box device |
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| CN114136650A true CN114136650A (en) | 2022-03-04 |
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| CN202111308687.1A Pending CN114136650A (en) | 2021-11-05 | 2021-11-05 | Gas-liquid two-phase flow mixing test box device |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200982216Y (en) * | 2006-12-01 | 2007-11-28 | 中国航空动力机械研究所 | Oil and gas mixer |
| CN202146745U (en) * | 2011-06-21 | 2012-02-22 | 宝钢集团新疆八一钢铁有限公司 | Pneumatic liquid medicine stirring device |
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| CN104634537A (en) * | 2015-01-09 | 2015-05-20 | 北京航空航天大学 | Visual experiment device suitable for low-temperature gas-liquid two-phase mixing |
| CN104819824A (en) * | 2014-06-24 | 2015-08-05 | 华北水利水电大学 | Underwater self suction injection stream flow characteristic integrated test device system |
| CN205551442U (en) * | 2016-04-13 | 2016-09-07 | 南京云开合金有限公司 | Magnesium liquid protection device is used in casting |
| CN106290978A (en) * | 2016-08-25 | 2017-01-04 | 北京航空航天大学 | A kind of transverse injection agitation blends liquid trace displaying particle generator |
| CN207709053U (en) * | 2017-12-18 | 2018-08-10 | 宁国久天化工有限公司 | A kind of logical oxygen reaction reaction kettle of phosphorus oxychloride membrane type |
| CN111412086A (en) * | 2020-05-21 | 2020-07-14 | 安徽九州云箭航天技术有限公司 | Weldless injector for liquid rocket engine |
| CN214440338U (en) * | 2021-02-08 | 2021-10-22 | 华北电力大学（保定） | Combined nozzle |
-
2021
- 2021-11-05 CN CN202111308687.1A patent/CN114136650A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200982216Y (en) * | 2006-12-01 | 2007-11-28 | 中国航空动力机械研究所 | Oil and gas mixer |
| CN202146745U (en) * | 2011-06-21 | 2012-02-22 | 宝钢集团新疆八一钢铁有限公司 | Pneumatic liquid medicine stirring device |
| CN202590664U (en) * | 2012-03-31 | 2012-12-12 | 中国航空工业集团公司沈阳发动机设计研究所 | Oil-gas mixing device |
| CN104819824A (en) * | 2014-06-24 | 2015-08-05 | 华北水利水电大学 | Underwater self suction injection stream flow characteristic integrated test device system |
| CN104634537A (en) * | 2015-01-09 | 2015-05-20 | 北京航空航天大学 | Visual experiment device suitable for low-temperature gas-liquid two-phase mixing |
| CN205551442U (en) * | 2016-04-13 | 2016-09-07 | 南京云开合金有限公司 | Magnesium liquid protection device is used in casting |
| CN106290978A (en) * | 2016-08-25 | 2017-01-04 | 北京航空航天大学 | A kind of transverse injection agitation blends liquid trace displaying particle generator |
| CN207709053U (en) * | 2017-12-18 | 2018-08-10 | 宁国久天化工有限公司 | A kind of logical oxygen reaction reaction kettle of phosphorus oxychloride membrane type |
| CN111412086A (en) * | 2020-05-21 | 2020-07-14 | 安徽九州云箭航天技术有限公司 | Weldless injector for liquid rocket engine |
| CN214440338U (en) * | 2021-02-08 | 2021-10-22 | 华北电力大学（保定） | Combined nozzle |
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