CN112361932B - Device for measuring eccentricity and insertion depth of fuel nozzle - Google Patents
Device for measuring eccentricity and insertion depth of fuel nozzle Download PDFInfo
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- CN112361932B CN112361932B CN202011383005.9A CN202011383005A CN112361932B CN 112361932 B CN112361932 B CN 112361932B CN 202011383005 A CN202011383005 A CN 202011383005A CN 112361932 B CN112361932 B CN 112361932B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The application belongs to the technical field of aero-engine combustion chamber design, and particularly relates to a device for measuring the eccentricity and the insertion depth of a fuel nozzle, which comprises a plurality of measuring heads and a connecting ring; the measuring head comprises: an outer cylinder divided into a first outer cylinder and a second outer cylinder; the inner positioning sleeve is coaxially arranged inside the first outer cylinder; the measuring slide block comprises a cylindrical section and a straight rod section, the cylindrical section is arranged in the inner positioning sleeve in a sliding mode, and a depth gauge through hole is formed in the cylindrical section; the depth gauge extends into the through hole of the depth gauge; and the circular measuring test piece is arranged on the end face of the cylindrical section. According to the device for measuring the eccentricity and the insertion depth of the fuel nozzle, the nozzle does not need to be disassembled, the nozzle position degree and the flame tube head position degree are measured independently to calculate the eccentricity of the nozzle head, the nozzle eccentricity can be directly measured under the assembly condition, the measurement cost is reduced, and the working efficiency is improved; in addition, the measurement of the eccentricity and the insertion depth of all the heads of the whole combustion chamber can be completed at one time.
Description
Technical Field
The application belongs to the technical field of aero-engine combustion chamber design, and particularly relates to a device for measuring the eccentricity and the insertion depth of a fuel nozzle.
Background
The fuel injector is the fuel supply for the combustion chamber and directly determines the performance of the combustion chamber. In actual work, the fuel nozzle and the main swirler are fixed together, and due to machining errors, thermal expansion, assembly modes and the like, the fuel nozzle with the main swirler can be eccentric with the venturi tube (referred to as nozzle eccentricity for short), the insertion depth of the fuel nozzle can also be changed, so that the circumferential directions of oil mist fields in the venturi tube and the outlet are not uniform, the venturi tube and the sleeve are ablated, and the performance and the service life of a combustion chamber are influenced.
The prior art scheme is that after a fuel nozzle is detached from a combustion chamber, the position degree of the head of the combustion chamber is measured through a tool, the position degree of the nozzle head is measured through three coordinates, the nozzle eccentricity is calculated in a reverse mode, and the measuring process is complex and the period is long. The nozzle insertion depth is obtained by measuring the distance from the outlet end face of the venturi tube to the outlet end face of the main swirler and the distance from the outlet end face of the fuel nozzle to the outlet end face of the main swirler respectively and then calculating the difference between the two.
The main disadvantages of the existing solutions are as follows:
1. when measuring the eccentricity, the fuel nozzle needs to be detached from the combustion chamber, and the position degree of the head of the flame tube and the position degree of the nozzle head need to be measured, so that the measuring method is too complex, long in period and high in cost.
2. The original method for measuring the eccentricity and the insertion depth belongs to an indirect measuring method, and error accumulation is caused by data conversion, so that the measuring precision is poor.
3. The measurement of the eccentricity and the insertion depth of all the fuel nozzles in the whole combustion chamber cannot be completed at one time.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present application provides an apparatus for measuring an eccentricity and an insertion depth of a fuel injection nozzle.
The application discloses a device for measuring the eccentricity and the insertion depth of a fuel nozzle, which comprises a plurality of measuring heads, wherein the number and the positions of the measuring heads are the same as those of a fuel nozzle head to be measured, and the plurality of measuring heads are fixedly connected through a connecting ring;
each of the measuring heads comprises:
the outer cylinder is divided into a first outer cylinder and a second outer cylinder along the axial direction, the first outer cylinder serves as a positioning section, and the inner diameter of the first outer cylinder is matched with the outer diameter of a venturi tube at a fuel nozzle head to be matched;
the inner diameter of the inner positioning sleeve is smaller than that of the first outer cylinder body, and the inner positioning sleeve is coaxially arranged inside the first outer cylinder body;
the measuring slide block comprises a cylindrical section and a straight rod section, the radial area of the cylindrical section is larger than the sectional area of the straight rod section, one end of the straight rod section is fixedly connected to the central position of one axial end face of the cylindrical section, the cylindrical section extends into an inner positioning sleeve in the first outer cylinder from an opening at one end of the second outer cylinder, which is far away from the first outer cylinder, and can slide in the axial direction in the inner positioning sleeve under the driving action of the straight rod section;
the depth gauge extends into the cylindrical section from an opening at one end of the second outer cylinder body, which is far away from the first outer cylinder body, and then extends into the through hole of the depth gauge;
the measuring test piece is circular and is fixedly arranged on the end face of one end of the cylindrical section, which is far away from the straight rod section, and the circle center of the measuring test piece is superposed with the axis of the cylindrical section.
According to at least one embodiment of the application, on the go-between with correspond the measuring head junction, seted up with the outer barrel aperture looks adaptation through-hole of second on the outer barrel, and in the peripheral one side towards the outer barrel of second of through-hole, be provided with the annular opening slot of opening towards the outer barrel of second for it is fixed with the one end opening of the outer barrel of second keeping away from first outer barrel to carry out the adaptation.
According to at least one embodiment of the present application, the diameter of the first outer cylinder is larger than the diameter of the second outer cylinder.
According to at least one embodiment of the present application, an outer positioning groove is formed at the vertex of the outer cylinder wall of the first outer cylinder.
According to at least one embodiment of the application, a sunken slide block slide way is arranged on the inner ring surface of the inner positioning sleeve, and the cylindrical section of the measuring slide block can axially slide in the slide block slide way; and
and a sliding block positioning boss is convexly arranged on the outer ring surface of the cylindrical section and used for limiting the axial sliding range of the cylindrical section in a sliding block slideway.
According to at least one embodiment of the present application, a depth gauge slide extending in an axial direction is recessed at a position in the depth gauge through hole of the cylindrical section; and
the depth gauge is characterized in that a depth gauge boss matched with the depth gauge slide way is convexly arranged at one position of the depth gauge extending into one part of the depth gauge through hole and used for limiting the axial sliding range of the depth gauge.
According to at least one embodiment of the present application, a test piece mounting groove for mounting the measurement test piece is formed on an end surface of the cylindrical section, on which the measurement test piece is disposed.
According to at least one embodiment of this application on the terminal surface of cylinder section setting measurement test piece, be provided with test piece location boss in centre of a circle department, seted up annular test piece constant head tank on outermost circumference for fix a position when measuring the test piece installation.
According to at least one embodiment of the application, at an end of the straight rod section remote from the cylindrical section, a slider handle is provided.
According to at least one embodiment of the application, at an end of the depth gauge remote from the cylindrical section, a depth gauge handle is provided.
The application has at least the following beneficial technical effects:
according to the device for measuring the eccentricity and the insertion depth of the fuel nozzle, the nozzle does not need to be disassembled, the nozzle position degree and the flame tube head position degree are measured independently to calculate the eccentricity of the nozzle head, the nozzle eccentricity can be directly measured under the assembly condition, the measurement cost is reduced, and the working efficiency is improved; in addition, the measurement of the eccentricity and the insertion depth of all the heads of the whole combustion chamber can be completed at one time.
Drawings
FIG. 1 is a schematic view of the device for measuring the eccentricity and the insertion depth of a fuel nozzle in the application;
FIG. 2 is a cross-sectional view of the present apparatus (only one measuring head is shown) for measuring fuel nozzle eccentricity and insertion depth;
FIG. 3 is an enlarged schematic view of the left-hand portion of FIG. 2;
FIG. 4 is a cross-sectional view of the apparatus for measuring the eccentricity and insertion depth of a fuel nozzle according to the present invention in use;
FIG. 5 is a schematic view of the circumferential orientation of the present apparatus for measuring fuel nozzle eccentricity and insertion depth in use;
FIG. 6 is a schematic diagram of the nozzle eccentricity measurement device for measuring the eccentricity and the insertion depth of the fuel nozzle.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. 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 application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be understood that technical terms such as "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., which may be referred to in the description of the present application, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present application.
The device for measuring the eccentricity and the insertion depth of the fuel nozzle of the present application will be described in further detail with reference to fig. 1 to 6.
The application discloses measure device of fuel nozzle eccentricity and depth of insertion, including measuring head 1, the quantity of measuring head 1 is a plurality of, and quantity and position are the same with the quantity and the position of the fuel nozzle head 7 that awaits measuring, and a plurality of measuring heads 1 are through a go-between 2 fixed connection.
Because the measuring heads on the measuring device have the same structure, only the specific structure of one measuring head is described here, and each specific measuring head 1 comprises an outer cylinder, an inner positioning sleeve 13, a measuring slide block, a depth gauge 4, a circular measuring test piece 5 and other structures.
The outer cylinder is divided into a first outer cylinder 11 and a second outer cylinder 12 along the axial direction, and the first outer cylinder 11 is used as a positioning section, as shown in fig. 4, and the inner diameter of the first outer cylinder is matched with the outer diameter of the venturi 6 at the fuel nozzle head 7 to be matched. In addition, it is preferable that the diameter of the first outer cylinder 11 is larger than that of the second outer cylinder 12. Preferably, an outer positioning groove 111 is formed at the uppermost point of the outer cylindrical wall of the first outer cylindrical body 11.
Furthermore, the connecting portion of the connecting ring 2, which is connected to the corresponding measuring head 1, is provided with a through hole adapted to the aperture of the second outer cylinder 12 on the outer cylinder, and an annular opening slot 21 having an opening facing the second outer cylinder 12 is disposed on the side of the periphery of the through hole facing the second outer cylinder 12, for being adapted and fixed to the opening of the end of the second outer cylinder 12, which is far away from the first outer cylinder 11.
The inner diameter of the inner positioning sleeve 13 is smaller than the inner diameter of the first outer cylinder 11 and is coaxially arranged inside the first outer cylinder 11. Further, a concave slide block slideway 131 is preferably arranged on the inner annular surface of the inner positioning sleeve 13, and the cylindrical section 31 of the measuring slide block can axially slide in the slide block slideway 131; and, a slider positioning boss 311 is protrudingly provided on an outer circumferential surface of the cylindrical section 31 for limiting an axial sliding range of the cylindrical section 31 in the slider slide 131.
The measuring slide block comprises a cylindrical section 31 and a straight rod section 32, the radial area of the cylindrical section 31 is larger than the sectional area of the straight rod section 32, and one end of the straight rod section 32 is fixedly connected to the central position of one axial end face of the cylindrical section 31; the axial length of the cylindrical section 31 plus the straight rod section 32 is greater than that of the outer cylinder body; a slider handle 321 is provided at one end of the straight rod segment 32 remote from the cylindrical segment 31. The cylindrical section 31 extends into the inner positioning sleeve 13 inside the first outer cylinder 11 from an opening at one end of the second outer cylinder 12, which is far away from the first outer cylinder 11, and the cylindrical section 31 can slide in the axial direction in the inner positioning sleeve 13 under the driving action of the straight rod section 32, and in addition, a depth gauge through hole is formed in the cylindrical section 31 at the vertical top position of the axial lead of the cylindrical section along the axial direction.
The depth gauge 4 extends into the through hole of the depth gauge after extending into the position of the cylindrical section 31 from an opening at one end of the second outer cylinder 12, which is far away from the first outer cylinder 11, and the axial length of the depth gauge 4 is greater than that of the outer cylinder. A depth gauge handle 42 is provided at one end of the depth gauge 4 remote from the cylindrical section 31. Further, a depth gauge slide 312 extending in the axial direction is recessed at a position in the depth gauge through hole of the cylindrical section 31; and a depth gauge boss 41 matched with the depth gauge slideway 312 is convexly arranged at one position of a part of the depth gauge 4 extending into the depth gauge through hole and used for limiting the axial sliding range of the depth gauge 4.
The measuring test piece 5 is circular and is fixedly arranged on one end face of the cylindrical section 31 far away from the straight rod section 32, and the circle center of the measuring test piece 5 coincides with the axis of the cylindrical section 31. Further, a test piece mounting groove 313 for mounting the measurement test piece 5 is formed on the end surface of the cylindrical section 31 on which the measurement test piece 5 is disposed. And, on the terminal surface of cylindrical section 31 that sets up measurement test piece 5, be provided with test piece location boss 314 in centre of a circle department, seted up annular test piece constant head tank 315 on outermost circumference for fix a position when measurement test piece 5 installs.
When the device for measuring the eccentric quantity and the insertion depth of the fuel nozzle is used, the installation of the measuring test piece 5 is firstly carried out:
the test piece 5 is installed in the test piece installation groove 313, the test piece 5 is fixed by the test piece positioning boss 314, and the test piece positioning groove 315 is used for determining the position right above the test piece 5.
And then carrying out measurement positioning:
firstly, a first outer cylinder 11 (positioning section) of the measuring device is sleeved on the straight section outside the venturi 6, and the first outer cylinder 11 and the straight section of the venturi contact with each other in a contact manner to realize axial positioning, as shown in fig. 4; then the first outer cylinder 11 is rotated to make the outer positioning groove 111 and the circle center of the main burning hole funnel 9 on the outer wall 8 of the flame tube corresponding to the head to be measured collinear, so as to realize circumferential positioning, as shown in fig. 4. After positioning, the position right above the test piece 5 is the position right above the measured head.
And measuring the insertion depth and the eccentricity of the nozzle:
after positioning, the slider handle 321 is pushed to move the measuring slider along the slider slideway 131 until the measuring test piece 5 contacts with the fuel nozzle head 7 and generates a nozzle head indentation, at the moment, the depth gauge handle 42 is pushed to enable the depth gauge 4 to slide along the depth gauge slideway 312 until the measuring test piece contacts with the main swirler 10, the pushing depth of the depth gauge at the moment is recorded, and the thickness of the measuring test piece 5 is subtracted, so that the nozzle insertion depth can be obtained; after the insertion depth is measured, the measuring device is taken down, then the measuring test piece 5 is taken down, as shown in fig. 6, three points are taken on the indentation in the measuring test piece 5, the center of the nozzle head 7 is determined by a three-point rounding method, the center of the nozzle head 7 is compared with the center (the center of a venturi tube) of the measuring test piece 5, and the eccentric amount of the nozzle head is determined by combining the position right above the measuring test piece 5 determined in the early stage.
In summary, the device for measuring the eccentricity and the insertion depth of the fuel nozzle does not need to disassemble the nozzle, independently measures the position degree of the nozzle and the position degree of the head of the flame tube to back calculate the eccentricity of the nozzle head, can directly measure the eccentricity of the nozzle under the assembly condition, reduces the measurement cost and improves the working efficiency; in addition, the measurement of the eccentricity and the insertion depth of all the heads of the whole combustion chamber can be completed at one time.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The device for measuring the eccentricity and the insertion depth of the fuel nozzle is characterized by comprising a plurality of measuring heads (1), wherein the number and the positions of the measuring heads (1) are the same as those of a fuel nozzle head (7) to be measured, and the plurality of measuring heads (1) are fixedly connected through a connecting ring (2);
each of the measuring heads (1) comprises:
the outer cylinder body is divided into a first outer cylinder body (11) and a second outer cylinder body (12) along the axial direction, the first outer cylinder body (11) serves as a positioning section, and the inner diameter of the first outer cylinder body is matched with the outer diameter of the venturi tube (6) at the position of the fuel nozzle head (7) to be matched;
the inner positioning sleeve (13) is smaller than the inner diameter of the first outer cylinder (11) and is coaxially arranged inside the first outer cylinder (11);
the measuring slide block comprises a cylindrical section (31) and a straight rod section (32), wherein the radial area of the cylindrical section (31) is larger than the sectional area of the straight rod section (32), one end of the straight rod section (32) is fixedly connected to the central position of one axial end face of the cylindrical section (31), the cylindrical section (31) extends into an inner positioning sleeve (13) inside the first outer cylinder (11) from an opening at one end of the second outer cylinder (12) far away from the first outer cylinder (11), the cylindrical section (31) can slide in the inner positioning sleeve (13) along the axial direction under the driving action of the straight rod section (32), and in addition, the cylindrical section (31) is positioned at the vertical top position of the axial lead of the cylindrical section and is provided with a depth ruler through hole along the axial direction;
the depth gauge (4) extends into the through hole of the depth gauge after extending into the position of the cylindrical section (31) from an opening at one end of the second outer cylinder (12) far away from the first outer cylinder (11);
the measuring test piece (5) is circular and is fixedly arranged on one end face, far away from the straight rod section (32), of the cylindrical section (31), and the circle center of the measuring test piece (5) coincides with the axis of the cylindrical section (31).
2. The device for measuring the eccentricity and the insertion depth of the fuel nozzle according to claim 1, wherein a through hole adapted to the aperture of the second outer cylinder (12) of the outer cylinder is formed at the joint of the connecting ring (2) and the corresponding measuring head (1), and an annular opening slot (21) with an opening facing the second outer cylinder (12) is formed at the periphery of the through hole on the side facing the second outer cylinder (12) and adapted and fixed to an opening at one end of the second outer cylinder (12) far away from the first outer cylinder (11).
3. The apparatus for measuring an eccentricity and an insertion depth of a fuel injection nozzle according to claim 1, wherein the diameter of the first outer cylinder (11) is greater than the diameter of the second outer cylinder (12).
4. The device for measuring the eccentricity and the insertion depth of a fuel nozzle according to claim 1, wherein an outer positioning groove (111) is formed at the topmost point of the outer cylinder wall of the first outer cylinder (11).
5. The device for measuring the eccentricity and the insertion depth of a fuel nozzle according to claim 1, characterized in that a concave slide way (131) is arranged on the inner annular surface of the inner positioning sleeve (13), and the cylindrical section (31) of the measuring slide can slide in the slide way (131) along the axial direction; and
and a sliding block positioning boss (311) is convexly arranged on the outer annular surface of the cylindrical section (31) and used for limiting the axial sliding range of the cylindrical section (31) in the sliding block slide way (131).
6. The device for measuring the eccentricity and the insertion depth of a fuel injector according to claim 1, characterized in that at the position of the cylindrical section (31), the recess is provided with a depth gauge slide (312) extending in the axial direction; and
and a depth gauge boss (41) matched with the depth gauge slide way (312) is convexly arranged at one position of one part of the depth gauge (4) extending into the depth gauge through hole and used for limiting the axial sliding range of the depth gauge (4).
7. The device for measuring the eccentricity and the insertion depth of the fuel nozzle according to claim 1, wherein a test piece mounting groove (313) for mounting the measurement test piece (5) is formed on the end surface of the cylindrical section (31) where the measurement test piece (5) is disposed.
8. The device for measuring the eccentricity and the insertion depth of the fuel nozzle according to claim 7, wherein a test piece positioning boss (314) is disposed at the center of the circle on the end surface of the cylindrical section (31) where the measurement test piece (5) is disposed, and an annular test piece positioning slot (315) is disposed on the outermost circumference for positioning when the measurement test piece (5) is installed.
9. The device for measuring the eccentricity and the insertion depth of a fuel injection nozzle according to claim 1, wherein a slider handle (321) is provided at one end of the straight rod section (32) away from the cylindrical section (31).
10. Device for measuring eccentricity and insertion depth of a fuel injector according to claim 1, characterized in that at the end of the depth gauge (4) remote from the cylindrical section (31) a depth gauge handle (42) is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383005.9A CN112361932B (en) | 2020-12-01 | 2020-12-01 | Device for measuring eccentricity and insertion depth of fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383005.9A CN112361932B (en) | 2020-12-01 | 2020-12-01 | Device for measuring eccentricity and insertion depth of fuel nozzle |
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| CN112361932A CN112361932A (en) | 2021-02-12 |
| CN112361932B true CN112361932B (en) | 2022-06-10 |
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| CN202011383005.9A Active CN112361932B (en) | 2020-12-01 | 2020-12-01 | Device for measuring eccentricity and insertion depth of fuel nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113899297A (en) * | 2021-09-29 | 2022-01-07 | 中国航发动力股份有限公司 | Device and method for measuring position degree of flame tube head of aircraft engine |
| CN114353633A (en) * | 2021-10-29 | 2022-04-15 | 中国航发西安动力控制科技有限公司 | Method and measuring tool for measuring aperture size in continuous depth range |
| CN114001630A (en) * | 2021-11-10 | 2022-02-01 | 中国航发南方工业有限公司 | Blade body groove eccentricity measuring device and method for guide blade |
| CN114812329A (en) * | 2022-04-14 | 2022-07-29 | 中国航发沈阳发动机研究所 | Device and method for checking matching of flame tube head |
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| JP2002214385A (en) * | 2001-01-16 | 2002-07-31 | Mitsubishi Heavy Ind Ltd | Device and method of detecting upper nozzle position |
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| CN112361932A (en) | 2021-02-12 |
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