CN207730133U - The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut - Google Patents
The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut Download PDFInfo
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- CN207730133U CN207730133U CN201721396676.2U CN201721396676U CN207730133U CN 207730133 U CN207730133 U CN 207730133U CN 201721396676 U CN201721396676 U CN 201721396676U CN 207730133 U CN207730133 U CN 207730133U
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- pedestal
- rotary shaft
- verticality
- centre bore
- mainshaft nut
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
A kind of blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut, it is characterised in that：Substrate fixes 4 support columns, and the pedestal equipped with centre bore is fixed on the upper end of 4 support columns.Centre bore of the hollow shaft axle portion equipped with boss on pedestal and the formation interference fit tolerance the internal diameter of centre bore.The upper end center of rotary shaft equipped with axle bumper is equipped with semicircle orifice, and the decorative pearl on top of an official cap is placed in the semicircle orifice.Rotary shaft lower end center is equipped with screw hole, and the locking cover that bottom is equipped with centre bore is fastened by screws in the screw hole of rotary shaft lower end.Compression spring is equipped between locking cover and the lower part of pedestal 3.Gap is equipped between the upper surface of locking cover and the lower surface of pedestal.Dial test indicator is anchored on survey table holder, and survey table holder is fixed on the side of pedestal.Solving the blind threaded verticality of locomotive pressure device mainshaft nut using apparatus above can not test problems.This apparatus structure is simple, at low cost, easy to operate, detection efficiency is high, and accuracy of detection is high.
Description
Technical field
The utility model is related to Turbochargers in Diesel Engines technical fields.
Background technology
Internal combustion engine supercharger is the core component of locomotive, and the rotating speed of booster its rotor at work generally all exists
30000-40000 revs/min, and charger central component is its rotor portion.Rotor portion is mainly by main shaft, wheel disc leaf
The compositions such as piece, bearing holder (housing, cover), impeller, mainshaft nut.It is non-to the requirement on machining accuracy of rotor part because of high temperature, high-revolving operating mode
Chang Gao, wherein mainshaft nut are the important components of the locking positioning of main shaft and impeller, its end face can be under great stress when fastening.
If end face is bad relative to screw thread verticality, it is meant that mainshaft nut end face and connected impeller face contact not when fastening
Uniformly, it is easy to form additional bending moment on spindle thread head, this has a significant impact for main shaft fatigue strength, results even in master
The quality accident that axle thread turns around occurs, and the dynamically balanced stabilization of rotor is also will have a direct impact in supercharger rotor high speed rotation
Property.Therefore, verticality of the detail of design of mainshaft nut for its end face relative to screw thread is strict with, because of the spiral shell of mainshaft nut
Line is complex-shaped special, and for screw thread again in the blind hole of mainshaft nut, the detection of screw thread is all more difficult, and foreign countries have the screw thread of profession to survey
The screw measurement instrument that technology company releases many professions is measured, but the device that can detect blind hole internal thread is considerably less, and these
Measuring instrument cost is high, and acquisition expenses is very high.
There are also general measuring apparatus such as three-coordinates measuring machines, optical measuring instrument also relevant screw measurement work(
Can, but all inadequate professional precision is not also high.Such as：Three coordinate measuring machine is taken along helicla flute by theoreticalpiston and a little establishes axis, but
Talent scout is surveyed not into trench interiors, measurement accuracy is not high, and detection process is cumbersome.Optical measuring machine is generally used for double headed roller center
The detection of the axial workpiece in hole can not form projection to the internal thread of mainshaft nut, also can not just detect.
Invention content
To overcome defect in the prior art, the utility model proposes following technical schemes：A kind of locomotive pressure device main shaft
The blind threaded testing apparatus for verticality of nut, it is characterised in that：Substrate fixes 4 support columns, is equipped with the pedestal of centre bore
It is fixed on the upper end of 4 support columns.Hollow shaft axle portion equipped with boss passes through the centre bore on pedestal and the internal diameter with centre bore
Between formed interference fit tolerance.The upper end center of rotary shaft equipped with axle bumper is equipped with semicircle orifice, and the decorative pearl on top of an official cap is placed in the semicircle orifice.
Rotary shaft lower end center is equipped with screw hole, and the locking cover that bottom is equipped with centre bore is fastened by screws in the screw hole of rotary shaft lower end.
Compression spring is equipped between locking cover and the lower part of pedestal.Gap is equipped between the upper surface of locking cover and the lower surface of pedestal.Lever
Amesdial is anchored on survey table holder, and survey table holder is fixed on the side of pedestal.Bottom plate uses hard nylon material.Pedestal uses
Aluminum alloy materials.Hollow shaft equipped with boss uses quenched and tempered steel.The endoporus of hollow shaft equipped with boss and the outer diameter of rotary shaft it
Between tolerance be 0.01-0.03mm, optimum value 0.02mm.It is a kind of blind using above-mentioned apparatus detection locomotive booster mainshaft nut
The method of hole screw thread verticality, includes the following steps：1）Mainshaft nut is tightened to rotary shaft threaded upper ends, is arrived using decorative pearl on top of an official cap top
Mainshaft nut blind hole bottom center position ensures that the screw thread of mainshaft nut freely locks shape with detection device rotation axle thread holding
State.2）Adjustment survey table holder ensures that the stylus of dial test indicator is contacted with the tested end face of mainshaft nut, and stylus is made to compress
Then 0.1mm -0.2mm rotates locking nut and drives rotary shaft rotation, wherein compression spring ensure that hollow shaft equipped with boss with
The shaft shoulder of rotary shaft keeps being in close contact axially without throwing, is rotated by 360 ° at this time, the variable quantity shown by dial test indicator can
To measure mainshaft nut end face run-out, since mainshaft nut end face is annulus, bounce is approximately equal to verticality, is computed verification
Error is less than 0.005mm, can be used directly as the axis of thread of mainshaft nut and the verticality of end face.
There is structure letter using the blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut of above-mentioned technical proposal
Single, at low cost, easy to operate, detection efficiency is high, accuracy of detection is high.Utilize decorative pearl on top of an official cap top to mainshaft nut blind hole bottom center position
It sets, ensures that the screw thread of mainshaft nut keeps free locking state with detection device rotation axle thread, rotate a circle and surveyed with amesdial
The device of the screw thread and end face squareness of grommet nut is measured, solving the blind threaded verticality of locomotive pressure device mainshaft nut can not
Test problems.
Description of the drawings
The utility model shares attached drawing 2 and opens：
Fig. 1 is the stereogram of the blind threaded testing apparatus for verticality of the utility model locomotive pressure device mainshaft nut.
Fig. 2 is the A-A sectional views of Fig. 1.
In figure：1, bottom plate, 2, support column, 3, pedestal, 4, the hollow shaft equipped with boss, 5, the rotary shaft equipped with the shaft shoulder, 6,
The decorative pearl on top of an official cap, 7, locking cover, 8, survey table holder, 9, dial test indicator, 10, compression spring, 11, screw, 12, mainshaft nut.
Specific implementation mode
This blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut, it is technically characterized in that：On bottom plate 1
4 support columns 2 are fixed in face, and the pedestal 3 equipped with centre bore is fixed on the upper end of 4 support columns 2, are equipped with the hollow shaft of boss
Centre bore of 4 axle portions on pedestal 3 and the formation interference fit tolerance the internal diameter of centre bore.Rotary shaft equipped with axle bumper
5 upper end center is equipped with semicircle orifice, and the decorative pearl on top of an official cap 6 is placed in the semicircle orifice.The lower end center of rotary shaft 5 is equipped with screw hole.Bottom is equipped with
The locking cover 7 of centre bore is anchored on by screw 11 in the screw hole of 5 lower end of rotary shaft.It is equipped between locking cover 7 and the lower part of pedestal 3
Compression spring 10.Gap is equipped between the upper surface and the lower surface of pedestal 3 of locking cover 7.Dial test indicator 9 is anchored on survey table holder 8
On, and survey table holder 8 is fixed on the side of pedestal 3.Bottom plate 1 uses hard nylon material.Pedestal 3 uses aluminum alloy materials, is equipped with
The hollow shaft 4 of boss uses quenched and tempered steel, is linked using screw between bottom plate 1 and support column 2.Pedestal 3 with it is hollow equipped with boss
Axis 4 uses temperature difference assembly method using interference fit, using different materials heat distortion amount difference, reaches mounting structure simplicity, weight
The features such as amount is light, and deflection is small after installation, reduces the assembly error of high precision part.The endoporus of hollow shaft 4 equipped with boss
Tolerance is 0.02-0.06mm, optimum value 0.04mm between the outer diameter of rotary shaft 5.
Ensure that the hollow shaft 4 of boss is fitted closely with the shaft shoulder holding of rotary shaft 5 with compression spring 10, no axial float solves
Measurement stability.Using the decorative pearl on top of an official cap 6 top to mainshaft nut 12 blind hole bottom center position, ensure mainshaft nut 12 screw thread with
5 screw thread of detection device rotary shaft keeps free locking state.It solves locking nut 7 with M12 backing-up screws 10 and drives rotary shaft 5
Rotation, and do not loosen.
A method of detecting the blind threaded verticality of locomotive booster mainshaft nut, including following step using above-mentioned apparatus
Suddenly：1）Mainshaft nut 12 is tightened to 5 threaded upper ends of rotary shaft, utilizes the top of the decorative pearl on top of an official cap 6 to 12 blind hole bottom center of mainshaft nut position
It sets, ensures that the screw thread of mainshaft nut 12 keeps free locking state with 5 screw thread of detection device rotary shaft.2）Table holder 8 is surveyed in adjustment
Ensure that the stylus of dial test indicator 9 is contacted with the tested end face of mainshaft nut 12, and stylus is made to compress 0.1mm -0.2mm, then
Rotating locking nut 7 drives rotary shaft 5 to rotate, and wherein compression spring 10 ensure that the shaft shoulder of hollow shaft 4 and rotary shaft 5 equipped with boss
It keeps being in close contact axially without throwing, be rotated by 360 ° at this time, the variable quantity shown by dial test indicator 9 can measure master
12 end face run-out of axis nut.Since 12 end face of mainshaft nut is annulus, bounce is approximately equal to verticality, and it is small to be computed validation error
In 0.005mm, can be used directly as the axis of thread of mainshaft nut 12 and the verticality of end face.
Claims (3)
1. a kind of blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut, it is characterised in that：Bottom plate（1）It fixes above
4 support columns（2）, it is equipped with the pedestal of centre bore（3）It is fixed on 4 support columns（2）Upper end, be equipped with boss hollow shaft
（4）Axle portion passes through the pedestal（3）On centre bore and between the internal diameter of the centre bore formed interference fit tolerance, be equipped with
The rotary shaft of axle bumper（5）Upper end center be equipped with semicircle orifice, the decorative pearl on top of an official cap（6）It is placed in the semicircle orifice, the rotary shaft（5）In lower end
The heart is equipped with screw hole, and bottom is equipped with the locking cover of centre bore（7）By screw（11）It is anchored on the rotary shaft（5）The screw hole of lower end
It is interior, the locking cover（7）With the pedestal（3）Lower part between be equipped with compression spring（10）, the locking cover（7）Upper surface and institute
State pedestal（3）Lower surface between be equipped with gap, dial test indicator（9）It is anchored on survey table holder（8）On, and the survey table holder
（8）It is fixed on the pedestal（3）Side.
2. the blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut according to claim 1, it is characterised in that：
The hollow shaft equipped with boss（4）Endoporus and the rotary shaft（5）Outer diameter between tolerance be 0.01-0.03mm.
3. the blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut according to claim 2, it is characterised in that：
The hollow shaft equipped with boss（4）Endoporus and the rotary shaft（5）Outer diameter between tolerance optimum value be 0.02mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396676.2U CN207730133U (en) | 2017-10-25 | 2017-10-25 | The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396676.2U CN207730133U (en) | 2017-10-25 | 2017-10-25 | The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207730133U true CN207730133U (en) | 2018-08-14 |
Family
ID=63091194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721396676.2U Active CN207730133U (en) | 2017-10-25 | 2017-10-25 | The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut |
Country Status (1)
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| CN (1) | CN207730133U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621217A (en) * | 2017-10-25 | 2018-01-23 | 中车大连机车研究所有限公司 | The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut and detection method |
-
2017
- 2017-10-25 CN CN201721396676.2U patent/CN207730133U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621217A (en) * | 2017-10-25 | 2018-01-23 | 中车大连机车研究所有限公司 | The blind threaded testing apparatus for verticality of locomotive pressure device mainshaft nut and detection method |
| CN107621217B (en) * | 2017-10-25 | 2023-08-29 | 中车大连机车研究所有限公司 | Device and method for detecting perpendicularity of blind hole threads of spindle nut of locomotive supercharger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191114 Address after: 116000 No. 49, central The Strip, Shahekou District, Liaoning, Dalian Co-patentee after: Dalian CRRC Zetong Machinery Co., Ltd Patentee after: CRRC DALIAN INSTITUTE CO., LTD. Address before: 116021 No. 49, central The Strip, Shahekou District, Liaoning, Dalian Patentee before: CRRC DALIAN INSTITUTE CO., LTD. |
|
| TR01 | Transfer of patent right |