CN114111584B - End face spacing detection device, air conduit assembly size detection tool and method - Google Patents
End face spacing detection device, air conduit assembly size detection tool and method Download PDFInfo
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- CN114111584B CN114111584B CN202010895444.1A CN202010895444A CN114111584B CN 114111584 B CN114111584 B CN 114111584B CN 202010895444 A CN202010895444 A CN 202010895444A CN 114111584 B CN114111584 B CN 114111584B
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The end face spacing detection device can accurately measure the distance between the upper end face and the lower end face in the narrow and deep space, is convenient to operate, and comprises an upper claw, a lower claw, an elongated guide sleeve, an elongated guide rod, a grating ruler, a support and a spring; when the seat is positioned, the slender guide rod sends the lower claw to the lower part of the lower end surface, the lower claw is forced to contact with the lower end surface by the spring, the slender guide sleeve sends the upper claw to the lower part of the upper end surface, and the inner threaded piece and the slender guide sleeve are adjusted through relative rotation, so that the upper claw contacts with the upper end surface. An engine air duct assembly dimension detection tool comprises the end face spacing detection device. Air duct assembly dimension detection tools and methods are also provided.
Description
Technical Field
The invention relates to the field of measurement of narrow deep space or aeroengines, in particular to measurement of end face spacing.
Background
The air conduit is one of the components affecting the aerodynamic performance of the aeroengine, the rear end of the air conduit is assembled in the inner cavity of the rear shaft of the Gao Guo rotor, and the front end of the air conduit is matched with the vortex reducer in the inner cavity of the rotor of the high-pressure compressor through a clamping ring. The position of the front end of the air duct relative to the vortex breaker influences the aerodynamic performance of the engine during operation, so that when the aircraft engine is equipped with the air duct, the assembly size of the air duct, in particular the distance between the front end of the air duct and the rotor disc, needs to be detected to judge and analyze the assembly performance of the air duct and the aerodynamic characteristics of the engine as a whole. Because the air conduit is positioned in the narrow and deep inner cavity of the aeroengine, measurement is difficult, the common scheme is to design a special measuring tool with a special model, but the tool has poor universality, when the sizes of the air conduits in the engines with different models are measured to change, the special measuring tool is required to be redesigned and configured, the manufacturing period is long, the assembly progress is influenced, and the resource waste is caused.
Disclosure of Invention
The invention aims to provide an end face spacing detection device which can accurately measure the distance between an upper end face and a lower end face in a narrow deep space and is convenient to operate.
The end face space detection device comprises an upper claw, a first contact part and a second contact part, wherein the upper claw is provided with a first contact part for contacting the upper end face; a lower jaw having a second contact portion for contacting the lower end surface;
an elongated guide sleeve connected with the upper claw and used for extending into the narrow and deep space from the inlet of the narrow and deep space; an elongated guide rod connected with the lower jaw and penetrating through the elongated guide sleeve;
the grating ruler comprises a scale grating and a reading head, one of the scale grating and the reading head is arranged on the slender guide sleeve, and the other one is arranged on the slender guide rod;
a support for positioning outside the narrow deep space;
the adjusting internal screw thread piece is rotatably arranged on the support but axially limited and is connected with external screw threads arranged on the slender guide sleeve; and a spring supporting the elongated guide bar at an upper end of the elongated guide sleeve;
when the support is positioned, the slender guide rod moves the lower jaw below the lower end face, the lower jaw is forced to be in contact with the lower end face by the spring, the slender guide sleeve moves the upper jaw below the upper end face, and the upper jaw can be in contact with the upper end face by relatively rotating the adjusting internal threaded piece and the slender guide sleeve.
The upper end of the slender guide sleeve is connected with an external thread piece, and the external thread piece provides external threads.
The guide pin is arranged on the guide pin, and the guide pin is matched with the guide groove in a sliding way so as to guide the guide pin to slide relatively to the guide pin.
Preferably, the guide groove and the guide pin are respectively provided in a sliding fit in orthogonal directions.
The long and thin guide rod is provided with a long notch, the scale grating is fixed in the long notch, and the reading head is arranged corresponding to the long notch and is fixed on the long and thin guide sleeve.
The end face distance detection device further comprises a calibration block for calibrating the distance between the contact parts of the upper jaw and the lower jaw before the end face distance detection device is inserted into the narrow deep space.
The outer periphery side of the adjusting internal screw member is provided with a rotating handle, and the outer periphery side of the external screw member is provided with a fixed handle.
The upper end of the slender guide rod is provided with a handle, the spring is sleeved on the slender guide rod, the lower end of the spring is propped against the upper end of the slender guide sleeve, and the upper end of the spring is propped against the handle.
The abutment, the spring or the upper jaw are provided as exchangeable components.
Another object of the present invention is an air duct assembly dimension detecting tool for realizing accurate measurement of the assembly dimension of air ducts of different models of engines, wherein the support is configured to be fixed on the rear end face of the air duct, the upper end face is the front end face of the air duct, and the lower end face is the front end face of the rotor disc, by adopting the above end face spacing detecting device.
It is a further object of the present invention to provide an air duct assembly dimension detecting method for detecting a distance between a front end face of an air duct and a front end face of a rotor disk, providing a first elongated member and an upper claw having a contact portion contacting the front end face of the air duct;
providing a second elongate member and a lower jaw having a contact portion contacting a front end face of the rotor disk;
providing a grating ruler, wherein one of a ruler grating and a reading head is arranged on the first elongated member, and the other is arranged on the second elongated member;
assembling a first elongated piece and a second elongated piece into a mobile pair, wherein an upper claw is mounted on the first elongated piece, and a lower claw is mounted on the second elongated piece; calibrating a distance between contact sites of the upper jaw and the lower jaw using a calibration block;
transferring the upper jaw to the lower side of the front end surface of the air duct and contacting the upper jaw by using a first elongated member, and transferring the lower jaw to the lower side of the front end surface of the rotor disk and contacting the lower jaw by using a second elongated member;
the distance between the front end face of the air duct and the front end face of the rotor disk is determined to be the distance calibrated by the calibration block plus the distance acquired by the reading head.
According to the invention, the lower jaw is transferred to the lower part of the lower end surface and the upper jaw is transferred to the lower part of the upper end surface by using the slender guide rod and the slender guide sleeve, and the inner threaded piece and the slender guide sleeve are regulated by relative rotation, so that the upper jaw is in accurate contact with the upper end surface;
the scale grating and the reading head are arranged on the slender guide rod and the slender guide sleeve, so that the moving distance of the upper claw can be measured while the internal thread piece is rotationally regulated. Through design above-mentioned terminal surface interval detection device, simplified the step of measuring the terminal surface interval in the narrow deep space, convenient and fast's realization part installation dimension's in the narrow deep space accurate measurement.
By applying the above end face pitch detection device to the air duct fitting size detection device and using the above air duct fitting size detection method, the step of measuring the air duct fitting size can be greatly simplified; the high-precision grating ruler is used as a main body of the measuring instrument, so that the measuring range is enlarged, and the measuring precision and accuracy can be improved; and the support, the spring or the upper claw is arranged to be a replaceable part, so that the device is applicable to aeroengines of different types and air ducts of different sizes, meets the measurement requirements in different scenes, improves the universality of the detection device, saves the design and manufacturing costs of special tools required by different models, and has higher economic benefit.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:
fig. 1 is a schematic diagram of an end face pitch detection device.
Fig. 2 is an overall schematic view of an end face spacing detection device for air duct assembly dimension detection.
Fig. 3 is a schematic view of the bottom of the end face pitch detection device.
Fig. 4 is a schematic view of the end face pitch detection device in a measurement state.
Fig. 5 is a cross-sectional view of the top structure of the end face pitch detection device.
Fig. 6 is an enlarged view of the top structure of the end face pitch detection device.
Fig. 7 is an enlarged view of the adjusting female screw.
FIG. 8 is a schematic view of one embodiment of a grating scale installation.
Fig. 9 is an enlarged view of another embodiment of the grating scale installation.
Fig. 10 is a schematic view of a sliding fit of the guide slot and guide pin.
Fig. 11 is a schematic diagram of a calibration block.
Detailed Description
The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.
It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the invention as it is actually claimed.
As in the end face pitch detection device shown in fig. 1 and 2, the housing measures the distance between the upper end face 101 and the lower end face 102 in the narrow deep space.
Referring to fig. 3 and 4 simultaneously, the end face pitch detection device includes an upper jaw 26 having a first contact portion 261 for contacting the upper end face 101; the lower jaw 8 has a second contact portion 9 for contacting the lower end face 102. The elongated guide sleeve 3 is connected with the upper jaw 26 for extending into the narrow and deep space from the entrance of the narrow and deep space, in fig. 3, the elongated guide sleeve 3 is in bolt connection with the upper jaw 26 through the L-shaped fastener 20, in other embodiments, the elongated guide sleeve 3 can also be in bolt connection with the upper jaw 26 directly, as long as the purpose of facilitating the disassembly of the upper jaw 26 is achieved. The elongated guide rod 7 is connected with the lower jaw 8, penetrates through the elongated guide sleeve 3, the tail end of the elongated guide rod 7 is connected with the lower jaw 8 through a pin in fig. 3, and the elongated guide rod 7 and the lower jaw 8 are connected in various other modes, such as a structure that clamping blocks are clamped with each other through clamping grooves.
As shown in fig. 1 and 10, the elongated guide sleeve 3 is provided with a guide groove 301, the elongated guide rod 7 is provided with a guide pin 19, and the guide groove 301 and the guide pin 19 are in sliding fit so as to guide the elongated guide rod 7 to slide relatively in the elongated guide sleeve 3. A plurality of guide pins 19 may be disposed on the elongated guide bar 7, and a plurality of guide grooves 301 may be disposed on the elongated guide sleeve 3. The matching of the guide groove 301 and the guide pin 19 can limit the movement range of the slender guide sleeve 3 and the slender guide rod 7, avoid the occurrence of larger measurement error of the grating ruler due to larger amplitude when the slender guide sleeve 3 is adjusted in the measurement process, and ensure certain measurement precision. A preferred embodiment is to provide the guide groove 301 and the guide pin 19 in a sliding fit in orthogonal directions, so as to better limit or guide the elongated guide sleeve 3 and the elongated guide rod 7.
The support 11 is used for positioning at the outer side of the narrow deep space, and plays a role in radial fixation of the whole device. Because the measuring part is positioned in the narrow and deep inner cavity, the slender guide rod 7 and the slender guide sleeve 3 axially extend out for a long distance, at the moment, the rigidity of the slender guide rod 7 is easy to influence, so that the measuring tool main body is unstable in shaking, a certain radial and axial supporting force can be provided in the measuring process through the support 11, and the stability of the slender guide rod 7 and the slender guide sleeve 3 is ensured. When the end face pitch detection device is used as the engine air duct assembly size detection device, the bottom of the holder 11 abuts against the rear end face of the air duct 30. As shown in fig. 5, the bottom of the support 11 is completely abutted against the rear end face of the air conduit 30, so that stable support can be provided for the elongated guide rod 7 and the elongated guide sleeve 3. When the measured air duct gauge is changed, the abutment 11 may be replaced with a diameter length that mates with the corresponding gauge air duct to provide a stable holding force.
The adjusting device for the top end part of the end face distance detecting device comprises an adjusting internal screw thread part 2, an external screw thread part 5 and a spring 13. The adjusting internal screw 2 is rotatably arranged on the support 11 but axially limited and is connected with an external screw thread arranged on the slender guide sleeve 3. One embodiment is shown in fig. 6, wherein the top end of the elongated guide sleeve 3 is connected to an external screw member 5, the external screw member 5 providing an external screw thread to achieve a screw-threaded engagement of the elongated guide sleeve 3 with the adjusting internal screw member 2. There are various ways of connecting the elongated guide sleeve 3 and the male screw 5, preferably by means of a pin 16 fastening the elongated guide sleeve 3 and the male screw 5, as shown in fig. 5. The external screw 5 itself cannot rotate at this time, but can move axially with the elongate guiding sleeve 3. The external screw 5 may also be provided integrally with the elongate guiding sleeve 3. The purpose of the fastening arrangement of the elongate guiding sleeve 3 with the external screw 5 is to achieve an axial adjustment of the elongate guiding sleeve 3 when the rotation adjustment of the internal screw 2 and the external screw 5 is effected in a threaded engagement. By adjusting the threaded connection of the internal thread member 2 and the external thread member 5 to adjust the movement of the elongated guide sleeve 3, moderate axial movement of the elongated guide sleeve 3 can be realized, so that the upper jaw 26 gradually moves and finally contacts the upper end face 101, and the problems of error in measurement or damage to parts caused by large-amplitude movement of the upper jaw 26 are avoided.
The specific mounting details of the adjusting internal screw 2 are shown in fig. 6 and 7, which are indirectly connected to the support 11 via the positioning block 4. The positioning block 4 is fixedly connected with the support 11 through a bolt 18, the bottom end of the adjusting internal thread piece 2 is provided with an annular protruding part which is matched with an annular concave part on the inner side of the upper part of the positioning block 4 so as to realize rotatable connection of the adjusting internal thread piece 2 and the positioning block 4, and meanwhile, the annular concave part of the positioning block 4 can enable the adjusting internal thread piece 2 to be limited in the axial direction, and at the moment, the axial movement of the slender guide sleeve 3 can be realized by rotating the adjusting internal thread piece 2.
Returning to fig. 1 and 2, the adjusting device of the top end part of the end face distance detecting device further comprises a spring 13, and the spring 13 supports the elongated guide rod 7 at the upper end of the elongated guide sleeve 3. Fig. 5 shows a detail, in which the upper end of the elongated guide bar 7 is provided with a handle 10, the handle 10 being fixed to the elongated guide bar 7 by means of a pin 17. The spring 13 is sleeved on the slender guide rod 7, the upper end of the spring 13 abuts against the lower end of the handle 10, the lower end abuts against the upper end of the slender guide sleeve 3, and the upper end of the bushing 6. The bushing 6 is fitted over the elongate guide rod 7 and the lower end abuts the upper end of the elongate guide sleeve 3. The bushing 6 provides a certain supporting effect, and simultaneously avoids influencing the axial positioning of the elongated guide sleeve 3 when the depth of the measuring part changes and the spring 13 needs to be replaced, thereby realizing the convenient and quick replacement of the spring 13.
The bushing 6 and the handle 10 limit the length of the spring 13, the handle 10 is pressed to deform the spring 13, and the lower end of the spring 13 is limited by the bushing 6, so that the slender guide rod 7 can axially move, and the lower jaw 8 is driven to axially move. When the measuring site is located in a deeper or shallower lumen, the spring 13 may be replaced with a different length or elasticity as appropriate to facilitate measurement.
As shown in fig. 6, the rotation handle 201 is provided on the outer peripheral side of the adjustment female screw 2, and the fixed handle 501 is provided on the outer peripheral side of the male screw 5. The rotation of the internal screw 2 can be conveniently and rapidly realized by using the rotary handle 201, and the fixed handle 501 is used for ensuring that the external screw 5 does not rotate in the process of adjusting the rotation of the internal screw 2.
When the support 11 is positioned, the elongated guide sleeve 3 moves the upper jaw 26 below the upper end face 101, the elongated guide bar 7 moves the lower jaw 8 below the lower end face 102, the handle 10 is pressed, and the lower jaw 8 is forced into contact with the lower end face 102 by the spring 13. Specifically, the second contact portion 9 of the lower jaw 8 is in contact with the lower end surface 102. The internal screw member 2 is rotationally regulated, and the slender guide sleeve 3 axially displaces, so that the upper claw 26 can be contacted with the upper end face 101.
In a preferred embodiment, as shown in fig. 8 and 9, the elongated guide rod 7 is provided with an elongated notch, the scale grating 21 is fixed in the elongated notch, and the reading head 22 is arranged corresponding to the elongated notch and is fixed on the elongated guide sleeve 3 by using a bolt 25. Therefore, after the lower jaw 8 contacts with the lower end face 102, the scale grating 21 on the slender guide rod 7 is fixed, and the reading head 22 synchronously moves axially while the slender guide sleeve 3, namely the upper jaw 26, is adjusted to realize the axial movement of the inner threaded piece 2, so that the axial movement distance when the upper jaw 26 is abutted against the upper end face 101 can be conveniently and quickly read directly. In another embodiment, the scale grating 21 is fixed on the elongated guide sleeve 3, the reading head 22 is installed in an elongated notch of the elongated guide rod 7, the scale grating 21 on the elongated guide rod 7 is fixed after the lower jaw 8 is contacted with the lower end surface 102, the fixed reading head 22 on the elongated guide rod 7 is fixed after the lower jaw 8 is contacted with the lower end surface 102, and the scale grating 21 moves synchronously and axially along with the elongated guide sleeve 3, so that the axial movement distance when the upper jaw 26 is contacted with the upper end surface 101 can be quickly and conveniently read.
The end face pitch detection device further includes a calibration block 27 for calibrating the distance between the contact portions of the upper jaw 26 and the lower jaw 8 before the end face pitch detection device is extended into the narrow deep space, as shown in fig. 11. The lower end surface of the vertical portion 271 of the calibration block 27 abuts against the second contact portion 9 of the lower jaw 8, and the lower end surface of the horizontal portion 272 of the calibration block 27 abuts against the first contact portion 261 of the upper jaw 26, and the distance between the upper jaw 26 and the lower jaw 8 is calibrated to the distance H0 between the vertical portion 271 and the horizontal portion 272 of the calibration block 27. The grating scale reading can be set to zero at this time, or can have a certain reading.
After the end face distance detecting device is extended into the narrow and deep space, the internal screw member 2 is adjusted in a rotating manner, the upper claw 26 moves axially and contacts with the upper end face 101, and the reading head 22 obtains the internal moving distance deltah. After Δh is determined, the distance between the upper end face 101 and the lower end face 102 can be calculated by calculating the sum of H0 and Δh. After the distance between the upper claw 26 and the lower claw 8 is calibrated before the device stretches into the narrow and deep space for measurement by using the calibration block, the distance measurement between the upper end face and the lower end face can be realized only by moving part of the distance between the upper claw 26 during continuous measurement, and particularly, in the case of longer distance between the upper end face and the lower end face, the distance measurement can be realized rapidly without gradually adjusting the slender guide sleeve 3 for a long time and only by moving part of the distance, and certain precision can be ensured.
The support 11, the spring 13 or the upper jaw 26 are provided as exchangeable components. When the radial distance between the measured upper end face 101 or lower end face 102 and the slender guide rod 7 or slender guide sleeve 3 is changed, for example, when the inner diameters of air guide pipes with different specifications are changed, the radial length of the support 11 or the upper claw 26 can be changed according to actual requirements, so that the same set of device is continuously used for measuring the distance between the upper end face and the lower end face. For the lower end surface 102 to be located deeper in the narrow deep space, the quick positioning of the lower jaw 8 and the lower end surface 102 can also be achieved by replacing springs 13 of different lengths. Therefore, by changing the size of the replaceable component, the device does not need to replace the measuring tool when facing different measuring conditions, thereby having higher practical value.
The implementation steps in use are as follows:
(1) According to different engine models, the upper claw 26, the support 11 and the spring 13 with proper lengths are selected, the upper claw 26 is mounted on the slender guide sleeve 3 through the fastener 20, the spring 13 is fixed between the handle 10 and the rotary handle 5, and the measuring support 11 is mounted on the rear end face of the air duct for positioning outside a narrow deep space.
(2) Before the end face distance detecting device is extended into the narrow deep space, the upper jaw 26 and the lower jaw 8 are fixed, and the first contact portion 261 of the upper jaw 26 and the second contact portion 9 of the lower jaw 8 are calibrated to have a distance H0 by using the calibration block 27.
(3) The end face distance detection device is extended into a narrow deep space, and the second contact part 9 on the lower claw 8 is contacted with the lower end face 102 by the hand-press handle 10 under the action of the spring 13 and the action of the guide pin 19.
(4) By rotating the adjusting internal screw 2, the elongated guide sleeve 3 is axially moved by its screw structure, the upper jaw 26 is axially moved synchronously until it is in close contact with the first contact surface 101, and during operation the cavity can be observed by means of a miniature night vision camera to see if it is already in close contact.
(5) The reading Δh on the reading head 22 is read, and the distance h=h0+Δh between the upper end face and the lower end face is calculated.
When the engine air duct assembly size detection tool using the above-described end face pitch detection device, the holder 11 is configured to be adapted to be fixed to the rear end face of the air duct 30, the upper end face 101 being the front end face of the air duct 30, and the lower end face 102 being the front end face of the rotor disk 50.
Although the foregoing embodiment takes the engine air duct assembly dimension detection as an example, the foregoing end face pitch detection device is not limited to the engine air duct assembly dimension detection, and other end face pitch detection in a narrow deep space may be used.
For the engine air duct assembly size detection tool comprising the end face distance detection device, when the inner diameters of air ducts of aeroengines of different types or air ducts of different specifications are measured to be different, only the support 11 or the upper claw 26 with different radial lengths can be replaced, if a rotor disc is located in a deeper inner cavity, the length of the spring 13 can be replaced, and a special tool is not required to be designed for different parts of different types, so that the detection tool has higher flexibility and higher efficiency in practical operation.
Since the air duct is one of the components affecting the aerodynamic performance of the aircraft engine, it is necessary to accurately grasp the installation distance between the front end of the air duct and the rotor disc. In combination with the foregoing embodiment of the end face pitch detection device, it can also be broadly understood that the engine air duct assembly dimension detection method of detecting the distance between the front end face of the air duct and the front end face of the rotor disc, by providing a first elongated member and a second elongated member, corresponds to the elongated guide sleeve 3 and the elongated guide bar 7 in the drawings, respectively. The first elongated member carries an upper jaw 26 and the second elongated member carries a lower jaw. The upper jaw 26 has a contact portion that contacts the front end surface of the air duct 30, i.e., a first contact portion 261; the lower jaw 8 has a contact portion, i.e., a second contact portion 9, contacting the front end surface of the rotor disk. The upper jaw 26 is moved below and in contact with the front end face of the air duct by the first elongate member and the lower jaw 8 is moved below and in contact with the front end face of the rotor disk by the second elongate member. The distance H0 between the contact points of the upper jaw 26 and the lower jaw 8 is calibrated by means of a calibration block 27 before the first and second elongated members are extended into the inner cavity of the aircraft engine. The grating scale 200 is provided, in which one of the scale grating 21 and the reading head 22 is provided on the first elongated member, and the other is provided on the second elongated member. The first and second elongate members are assembled into a mobile pair whereby a change in the reading of the grating scale 200 can be achieved by moving the first elongate member, i.e. the distance that the reading head 22 reads, as the upper jaw 26 is brought to the upper end face. The distance between the front end face of the air duct and the front end face of the rotor disk is determined to be the distance H0 calibrated by the calibration block plus the distance deltah acquired by the reading head.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.
Claims (11)
1. The utility model provides an terminal surface interval detection device, is measured to the distance between up end in the narrow deep space and the lower terminal surface, its characterized in that includes:
an upper jaw (26) having a first contact portion (261) for contacting the upper end face (101);
-a lower jaw (8) having a second contact portion (9) for contacting the lower end face (102);
an elongated guide sleeve (3) connected to the upper jaw (26) for extending into the narrow and deep space from an inlet of the narrow and deep space;
an elongated guide rod (7) connected to the lower jaw (8) and penetrating the elongated guide sleeve (3);
the grating ruler (200) comprises a scale grating (21) and a reading head (22), one of the scale grating (21) and the reading head (22) is arranged on the slender guide sleeve (3), and the other is arranged on the slender guide rod (7);
-a seat (11) for positioning outside said narrow deep space;
an adjusting internal screw (2) which is rotatably arranged on the support (11) but is limited in the axial direction and is connected with external screw threads arranged on the slender guide sleeve (3); and
a spring (13) for supporting the elongated guide rod (7) at the upper end of the elongated guide sleeve (3);
when the support (11) is positioned, the slender guide rod (7) moves the lower claw (8) below the lower end face (102), the lower claw (8) is forced to be in contact with the lower end face (102) by the spring (13), the slender guide sleeve (3) moves the upper claw (26) below the upper end face (101), and the upper claw (26) can be in contact with the upper end face (101) by relatively rotating the adjusting internal screw (2) and the slender guide sleeve (3).
2. The end face spacing detection device according to claim 1, characterized in that the upper end of the elongated guide sleeve (3) is connected to an external screw member (5), the external screw member (5) providing the external screw thread.
3. The end face distance detection device according to claim 1, wherein a guide groove (301) is provided on the elongated guide sleeve (3), a guide pin (19) is provided on the elongated guide rod (7), and the guide groove (301) and the guide pin (19) are slidably matched to guide the relative sliding of the elongated guide sleeve (3) and the elongated guide rod (7).
4. An end face pitch detection apparatus according to claim 3, wherein the guide groove (301) and the guide pin (19) are provided in a sliding fit in orthogonal directions, respectively.
5. An end face pitch detection apparatus as claimed in claim 1, wherein the elongated guide bar (7) is provided with an elongated notch, the scale grating (21) being fixed in the elongated notch, the readhead (22) being arranged in correspondence of the elongated notch and being fixed to the elongated guide sleeve (3).
6. The end face pitch detection apparatus according to claim 1, further comprising an alignment block (27) for aligning a distance between contact portions of the upper jaw (26) and the lower jaw (8) before the end face pitch detection apparatus is extended into the narrow deep space.
7. The end face pitch detection apparatus according to claim 2, wherein a rotating handle (201) is provided on an outer peripheral side of the adjusting female screw member (2), and a fixed handle (501) is provided on an outer peripheral side of the male screw member (5).
8. The end face distance detection device according to claim 1, wherein a handle (10) is arranged at the upper end of the slender guide rod (7), the spring (13) is sleeved on the slender guide rod (7), the lower end of the spring is abutted against the upper end of the slender guide sleeve (3), and the upper end of the spring is abutted against the handle (10).
9. An end face spacing detection device according to claim 1, characterized in that the abutment (11), the spring (13) or the upper jaw (26) are provided as exchangeable components.
10. An air duct assembly dimension detecting tool, characterized in that, with the end face pitch detecting device according to any one of claims 1 to 9, the holder (11) is configured to be fixed to a rear end face of an air duct, the upper end face (101) is a front end face of an air duct (30), and the lower end face (102) is a front end face of a rotor disc (50).
11. An air duct assembly dimension detecting method for detecting the distance between the front end face of an air duct and the front end face of a rotor disk, characterized in that,
providing a first elongate member and an upper jaw (26), the upper jaw (26) having a contact location for contacting a front face of an air duct (30);
providing a second elongated member and a lower jaw (8), the lower jaw (8) having a contact portion contacting a front end face of the rotor disc (50);
providing a grating ruler (200), wherein one of a ruler grating (21) and a reading head (22) is arranged on the first elongated member, and the other is arranged on the second elongated member;
assembling a first elongated member and a second elongated member into a mobile pair, wherein an upper claw (26) is mounted on the first elongated member, and a lower claw (8) is mounted on the second elongated member;
calibrating the distance between the contact points of the upper jaw (26) and the lower jaw (8) with a calibration block;
transferring the upper jaw (26) to and contacting below the front end face of the air duct (30) with a first elongate member and transferring the lower jaw (8) to and contacting below the front end face of the rotor disc (50) with a second elongate member;
the distance between the front end surface of the air conduit (30) and the front end surface of the rotor disk (50) is determined to be the distance calibrated by the calibration block plus the distance acquired by the reading head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL418279A1 (en) * | 2016-08-10 | 2018-02-12 | Revolvent Spółka Akcyjna | Device for regulation of air flow through a ventilation ducts |
| CN211249807U (en) * | 2019-11-29 | 2020-08-14 | 中国航发商用航空发动机有限责任公司 | Lifting clamp for air conduit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL418279A1 (en) * | 2016-08-10 | 2018-02-12 | Revolvent Spółka Akcyjna | Device for regulation of air flow through a ventilation ducts |
| CN211249807U (en) * | 2019-11-29 | 2020-08-14 | 中国航发商用航空发动机有限责任公司 | Lifting clamp for air conduit |
Non-Patent Citations (1)
| Title |
|---|
| TC4钛合金空气导管精密成形加工工艺研究;邵晓寒;李昱;;中国新技术新产品(01);全文 * |
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