CN112098101B - Pressure relief and gas collection device for constant volume combustion bomb - Google Patents
Pressure relief and gas collection device for constant volume combustion bomb Download PDFInfo
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- CN112098101B CN112098101B CN202011006654.7A CN202011006654A CN112098101B CN 112098101 B CN112098101 B CN 112098101B CN 202011006654 A CN202011006654 A CN 202011006654A CN 112098101 B CN112098101 B CN 112098101B
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- push rod
- base
- thimble push
- linear bearing
- pressure
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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
- G01M15/02—Details or accessories of testing apparatus
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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
- G01M15/04—Testing internal-combustion engines
Abstract
The invention relates to a pressure relief and gas collection device for a constant volume combustion bomb, which comprises a base, wherein a linear bearing is arranged in the base, an inverted T-shaped thimble push rod is matched with the linear bearing in a sliding manner, a gas storage cavity is arranged in the base below the linear bearing, a one-way valve for discharging gas in the gas storage cavity is arranged on the side wall of the base, a pressing plate is sleeved on the thimble push rod, a return spring is arranged between the pressing plate and the upper end surface of the linear bearing, the inner side surface of the lower end of the thimble push rod is separated from the lower end surface of the base when the thimble push rod is pushed to move downwards by external force, and the inner side surface of the lower end of the thimble push rod is sealed and closed with the lower end surface of the base when the thimble push rod is pulled to move upwards by the external force disappearance return spring. The invention realizes the separation or the closure of the inner side surface of the lower end of the thimble push rod and the lower end surface of the base by applying pressure to the thimble push rod, controls the constant volume combustion bomb combustion chamber to maintain pressure and release pressure in real time, and can collect gas while releasing pressure after the experiment is finished so as to carry out later-stage gas analysis and other experimental steps.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a pressure relief and gas collection device for a constant volume combustion bomb.
Background
The constant volume combustion bomb is an engine combustion simulation test device, and is based on the actual working condition and working environment of an engine, and the simulation research is carried out on the specific processes of oil injection and combustion. The combustion efficiency and the energy efficiency of the engine are improved by changing the test parameters and the test conditions under the same working condition with the engine, so that the high-temperature and high-pressure test environment in the engine combustion chamber is indispensable to establish, and the safety protection under the high-temperature and high-pressure test environment is ensured to be the first problem.
Therefore, in order to solve the hidden danger of the constant volume combustion bomb in a high-temperature and high-pressure environment, a pressure relief device of the constant volume combustion bomb needs to be added. The arrangement of a pressure relief device is lacked in the experimental device for checking the constant-volume combustion bomb in each scientific research institute at present, most of the experimental devices are used for relieving pressure by using exhaust holes under the condition of pressure overload, but the exhaust holes are extremely unsafe along with huge air pressure impact at the opening moment. The constant volume combustion bomb device of Jiangsu university has the configuration of increasing a safety valve; the invention relates to a Wuhan theory university, the Chinese bulletin number is CN111256999A, the name is: the two design schemes are that when the air pressure in the combustion chamber of the constant volume bomb is larger than a certain specific pressure set by the pressure relief device, the safety valve or the pressure relief device is opened to relieve the pressure. This has just led to pressure relief device's limitation, can't change the uninstallation pressure in real time and can't satisfy the regulation and control to constant volume bomb combustion chamber atmospheric pressure in the experimentation.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides a pressure relief and gas collection device for a constant volume combustion bomb, which can perform real-time pressure relief and gas collection on the air pressure in a combustion chamber in the test process of the constant volume combustion bomb.
The technical scheme adopted by the invention for solving the technical problems is as follows: a pressure relief and gas collection device for a constant volume combustion bomb is provided with a base, the lower end of the base is fixedly connected with the constant volume combustion bomb device in a sealing mode, a linear bearing is installed in the base, an ejector pin push rod in an inverted T shape is arranged in a sliding fit mode with the linear bearing, the upper end of the ejector pin push rod extends out of the upper end face of the base, the lower end of the ejector pin push rod extends out of the lower end face of the base, a gas storage cavity is formed in the base below the linear bearing, a one-way valve for discharging gas in the gas storage cavity to the outside is installed on the side wall of the base, a pressing plate is sleeved on the ejector pin push rod extending out of the upper end face of the base, a reset spring is arranged between the pressing plate and the upper end face of the linear bearing, the inner side face of the lower end of the ejector pin push rod is separated from the lower end face of the base when the ejector pin push rod is pushed to move downwards by external force, and the inner side face of the lower end of the ejector pin push rod is sealed and closed with the lower end face of the base when the ejector pin push rod is pulled to move upwards by the reset spring when the external force disappears.
Specifically, in order to realize high sealing performance when the ejector pin push rod and the base are closed, the lower end face of the base is respectively provided with a first plane contact surface, a first conical contact surface and an annular boss from inside to outside, the inner side face of the lower end of the ejector pin push rod is respectively provided with a second plane contact surface, a second conical contact surface and a U-shaped groove from inside to outside correspondingly, and an O-shaped sealing ring is arranged on a closed face between the annular boss and the U-shaped groove.
The inner ring of the linear bearing is in sealing fit with the ejector pin push rod and controls the moving direction and displacement limit of the ejector pin push rod, and the outer ring of the linear bearing is fixed with the inner hole of the base in a sealing way.
In order to conveniently adjust the resilience force of the reset spring, the top end of the ejector pin push rod is connected with a self-locking nut which is tightly pressed on the upper end face of the pressing plate.
The bottom surface of the thimble push rod is provided with a circular groove, so that the bottom of the installed thimble push rod is positioned in a constant volume combustion bomb combustion chamber, air pressure can be gathered under the pressure condition, and the bottom of the thimble push rod and the bottom of the base are closed more tightly.
The beneficial effects of the invention are: the invention controls the displacement of the thimble push rod in a mode of applying pressure to the thimble push rod, realizes the separation or closing of the inner side surface of the lower end of the thimble push rod and the lower end surface of the base, further controls the size of the pressure relief air output, and can perform pressure maintaining and pressure relief on a constant volume combustion bomb combustion chamber in real time through the control of the thimble push rod, thereby avoiding the potential safety hazard caused by instantaneous high air pressure impact when a pressure relief outlet is opened after the experiment is finished, having higher sealing performance and no external air infiltration, and being capable of performing the collection of air while performing the pressure relief after the experiment is finished, so as to facilitate the later-stage gas analysis and other experimental steps.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1. the self-locking type ejector pin sealing device comprises a one-way valve, 2 parts of an ejector pin push rod, 201 parts of a U-shaped groove, 202 parts of a second conical contact surface, 203 parts of a second planar contact surface, 204 parts of a circular groove, 3 parts of a base, 301 parts of a first planar contact surface, 302 parts of a first conical contact surface, 303 parts of an annular boss, 4 parts of a baffle, 5 parts of a self-locking nut, 6 parts of a return spring, 7 parts of a linear bearing and 8 parts of an O-shaped sealing ring.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The pressure relief and gas collection device for the constant volume combustion bomb, as shown in fig. 1, has a cylindrical base 3 made of austenitic stainless steel, the base 3 is internally divided into an upper part, a middle part and a lower part, wherein the upper part and the middle part in the base 3 form a step through hole with a large upper part and a small lower part, and the lower end part in the base is of a U-shaped structure, which is a function realization part of the device.
A linear bearing 7 is arranged in a large hole of the step through hole of the base 3, the upper end surface of the linear bearing 7 is aligned with the upper plane of the base, and the lower end surface of the linear bearing 7 is attached to the step surface of the step through hole of the base 3; with linear bearing 7 sliding fit has the thimble push rod 2 that is the shape of falling T, the upper end of thimble push rod 2 stretches out 3 up end of base, the lower extreme stretches out 3 lower terminal surfaces of base, linear bearing 7 inner circle and thimble push rod 2 sealed cooperation and control thimble push rod 2's moving direction and displacement limit, linear bearing 7 outer lane and 3 hole seal of base are fixed.
The thimble push rod 2 is austenite stainless steel material, and under the environment such as greasy dirt and vapor that the constant volume combustion experiment produced, austenite stainless steel corrosion resistance is stronger to can continuously work under high temperature high pressure.
The gas storage cavity is formed by the small hole part of the through hole of the 3 steps of the base below the linear bearing 7, the one-way valve 1 for discharging gas in the gas storage cavity to the outside is arranged on the side wall of the base 3 at the position of the gas storage cavity, the base 3 is hermetically connected with the side wall of the combustion chamber of the constant volume combustion bomb device below the one-way valve 1 in a welding mode, and the bottom end of the base 3 penetrates into the combustion chamber of the constant volume combustion bomb for a certain size, so that a certain matching space is reserved for closing the device. The portion of the base 3 above the one-way valve 1 is outside the constant volume burner bomb unit and is exposed to the air environment.
The check valve 1 is located the middle part of the base 3, the mounting holes of the check valve 1 and the side wall of the base 3 are sealed and fixed, only the gas in the device is allowed to pass through the air environment, the external gas can not enter the device, and the gas tightness design can enable the discharged gas to be directly accessed into the gas collecting tank for subsequent gas analysis due to the fact that other gases are not mixed in the process of exhausting the pressure relief device.
A pressing plate 4 is sleeved on the ejector pin push rod 2 extending out of the upper end face of the base 3, a return spring 6 is arranged between the pressing plate 4 and the upper end face of the linear bearing 7, and the top end of the ejector pin push rod 2 is connected with a self-locking nut 5 tightly pressed on the upper end face of the pressing plate 4.
The lower end surface of the base 3 is respectively provided with a first plane contact surface 301, a first conical contact surface 302 and an annular boss 303 from inside to outside, the vertical section and the horizontal section of the thimble push rod 2 are in arc transition, so that the stress transmitted from the bottom to the middle part of the thimble push rod 2 is more uniform, the lower end of the thimble push rod 2 is in a U-shaped structure, with 3 bottom closures of base and open realization device's pressure release and pressurize function, 2 lower extreme medial surfaces of thimble push rod from inside to outside correspond with 3 lower terminal surfaces of base respectively and are equipped with second plane contact surface 203, second toper contact surface 202 and U-shaped recess 201, the closing surface that is located between annular boss 303 and the U-shaped recess 201 is equipped with O shape sealing washer 8, U-shaped recess 201 sets up the gas outlet up, can avoid the gas leakage phenomenon that causes at the direct impact of high pressure in the experimentation, the design of U-shaped recess 201 also enables arranging and installing of sealing member more convenient firm. The bottom surface of the thimble push rod 2 is provided with a circular groove 204, so that a certain air pressure can be gathered when the thimble push rod 2 and the base 3 are closed, and the thimble push rod 2 and the bottom of the base 3 are matched more closely.
Pressure is applied to the upper portion of the ejector pin push rod 2 in a mode of electric push rod application and the like, the reset spring 6 is compressed, the ejector pin push rod 2 moves downwards, the inner side face of the lower end of the ejector pin push rod 2 is separated from the lower end face of the base 3, the device is opened to release pressure, when the pressure applied in the mode of electric push rod application and the like is removed, the restoring force of the reset spring 6 pulls the ejector pin push rod 2 to move upwards, the inner side face of the lower end of the ejector pin push rod 2 is sealed and closed with the lower end face of the base 3, and the device is closed to maintain pressure.
When the constant-volume combustion bomb is used, the pressure of the control device can be relieved under a certain specific pressure through data measured by the pressure sensor of the constant-volume combustion bomb. If the constant-volume combustion bomb needs to be decompressed at 100mpa, the pressure sensor applies pressure to the upper end of the thimble push rod 2 when measuring 100mpa, and then decompression can be started; if the experiment of constant volume burning bomb requires 50 mpa's atmospheric pressure, if measure the internal atmospheric pressure of constant volume burning bomb and reach 60mpa with the help of pressure sensor, just at this time can exert a bit of pressure through thimble push rod 2, let out a small amount of gas, reduce the difference of actual measurement pressure and required experiment pressure.
The constant-volume bomb body pressure relief device has the main function of pressure relief, and can collect gas to prepare for subsequent experiments while relieving pressure, so that a special hole is not needed to be formed in the constant-volume bomb body to collect the gas.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a pressure release and gas collection device for constant volume burning bomb, has sealed base (3) that links firmly of lower extreme and constant volume burning bomb device, characterized by: the thimble structure is characterized in that a linear bearing (7) is installed in the base (3), an inverted T-shaped thimble push rod (2) is in sliding fit with the linear bearing (7), the upper end of the thimble push rod (2) extends out of the upper end surface of the base (3), the lower end of the thimble push rod extends out of the lower end surface of the base (3), the lower end surface of the base (3) is respectively provided with a first plane contact surface (301), a first conical contact surface (302) and an annular boss (303) from inside to outside, the inner side surface of the lower end of the thimble push rod (2) is respectively provided with a second plane contact surface (203), a second conical contact surface (202) and a U-shaped groove (201) from inside to outside, an O-shaped sealing ring (8) is arranged on a closed surface between the annular boss (303) and the U-shaped groove (201), and the bottom surface of the thimble push rod (2) is provided with a circular groove (204);
the gas storage cavity is arranged in the base (3) below the linear bearing (7), the one-way valve (1) for discharging gas in the gas storage cavity to the outside is arranged on the side wall of the base (3), the pressing plate (4) is sleeved on the ejector pin push rod (2) extending out of the upper end face of the base (3), the reset spring (6) is arranged between the pressing plate (4) and the upper end face of the linear bearing (7), the inner side face of the lower end of the ejector pin push rod (2) is separated from the inner side face of the lower end of the base (3) when the ejector pin push rod (2) is pushed to move downwards by external force, and the inner side face of the lower end of the ejector pin push rod (2) is sealed and closed with the inner side face of the lower end face of the base (3) when the ejector pin push rod (2) is pulled to move upwards by the reset spring (6) when the external force disappears.
2. The pressure and gas collecting device for the constant volume bomb according to claim 1, wherein: the inner ring of the linear bearing (7) is in sealing fit with the thimble push rod (2) and controls the moving direction and the displacement limit of the thimble push rod (2), and the outer ring of the linear bearing (7) is fixed with the inner hole of the base (3) in a sealing way.
3. The pressure and gas collecting device for the constant volume bomb according to claim 1, wherein: the top end of the thimble push rod (2) is connected with a self-locking nut (5) which is tightly pressed on the upper end surface of the pressure plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006654.7A CN112098101B (en) | 2020-09-23 | 2020-09-23 | Pressure relief and gas collection device for constant volume combustion bomb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006654.7A CN112098101B (en) | 2020-09-23 | 2020-09-23 | Pressure relief and gas collection device for constant volume combustion bomb |
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| Publication Number | Publication Date |
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| CN112098101A CN112098101A (en) | 2020-12-18 |
| CN112098101B true CN112098101B (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011006654.7A Active CN112098101B (en) | 2020-09-23 | 2020-09-23 | Pressure relief and gas collection device for constant volume combustion bomb |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BE755411A (en) * | 1969-08-27 | 1971-03-01 | Union Carbide Corp | RELIEF VALVE FOR SEALED FLUID-TIGHT CONTAINER AND ESPECIALLY FOR ALKALINE GALVANIC CELL |
| JPH04301106A (en) * | 1991-03-28 | 1992-10-23 | Aisin Seiki Co Ltd | Hydraulic lifter with valve stopping device |
| CN100595459C (en) * | 2008-11-24 | 2010-03-24 | 王青 | Multifunctional decompression valve |
| CN204477404U (en) * | 2014-12-26 | 2015-07-15 | 四川欧迅能源工程科技有限公司 | A kind of self-locking precompression water and gas dual-purpose Decompression valves |
| CN105546265B (en) * | 2015-12-10 | 2017-09-15 | 重庆福悦安科技有限公司 | Gas pipeline pressurize pressure relief device |
| CN106931200B (en) * | 2017-03-08 | 2023-03-14 | 佛山市昌达业自动化科技有限公司 | Ultrahigh pressure manual pressure relief device |
| CN206845934U (en) * | 2017-06-12 | 2018-01-05 | 苏州德兰能源科技股份有限公司 | A kind of elastic compensating type sealing ring and double seal valve |
| CN109010941B (en) * | 2018-07-09 | 2021-04-30 | 青海嘉瑞康医疗器械检验检测有限公司 | Drainage device convenient to measure for medical technology development |
| CN209638770U (en) * | 2018-12-23 | 2019-11-15 | 郴州百江燃气实业有限公司 | A kind of bottled gas safety adjustable-pressure control device |
| CN210265915U (en) * | 2019-06-03 | 2020-04-07 | 沈阳中汽检测技术有限公司 | Safety air-tight device |
| CN210890998U (en) * | 2019-07-16 | 2020-06-30 | 中国石油化工股份有限公司 | Breather and oil tank using same |
| CN111256999A (en) * | 2020-02-24 | 2020-06-09 | 武汉理工大学 | Pressure relief device for high-pressure constant-volume combustion bomb |
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2020
- 2020-09-23 CN CN202011006654.7A patent/CN112098101B/en active Active
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