CN213655225U - Turbocharger rotor shaft with inner hole exhaust groove - Google Patents
Turbocharger rotor shaft with inner hole exhaust groove Download PDFInfo
- Publication number
- CN213655225U CN213655225U CN202022901243.6U CN202022901243U CN213655225U CN 213655225 U CN213655225 U CN 213655225U CN 202022901243 U CN202022901243 U CN 202022901243U CN 213655225 U CN213655225 U CN 213655225U
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- China
- Prior art keywords
- hole
- impeller
- rotor shaft
- boss
- inner hole
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- Expired - Fee Related
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- 239000011148 porous material Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 12
- 238000010894 electron beam technology Methods 0.000 abstract description 9
- 229910000990 Ni alloy Inorganic materials 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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Abstract
The utility model discloses a turbo charger rotor shaft with hole air discharge duct, including the axis body, the tip of axis body be equipped with and supply boss male hole on the impeller, just the hole pore wall on be equipped with and to insert the time can be with hole in air escape's air discharge duct at the boss. The boss that turbo charger rotor shaft and impeller pressed fit each other sets up on the impeller, and the hole sets up on turbo charger rotor shaft, has avoided setting up the hole on the nickel alloy impeller and has leaded to the precision low, problem with high costs. In addition, when the boss of the impeller is pressed into the inner hole of the shaft body, due to the existence of the exhaust grooves in the hole wall of the inner hole, air cannot be compressed in the inner hole all the time, and can be discharged along with the exhaust grooves, so that the joint surface of the shaft body and the boss can be tightly attached, the technical problems that the press fitting between the shaft body and the impeller is not in place and the joint surface cannot be tightly attached are solved, and the technical problem that an explosion pit is easily caused due to the residual air in the inner hole when vacuum electron beam welding is carried out is also solved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a turbo charger rotor shaft with hole air discharge duct.
[ background of the invention ]
The existing turbocharger rotor shaft needs to be subjected to vacuum electron beam welding when being connected with an impeller, before welding, a boss of the turbocharger rotor shaft is firstly inserted into an inner hole on the impeller, and then the vacuum electron beam welding is carried out. The hole sets up on the impeller at present, but the material of impeller is high temperature nickel alloy, because high temperature nickel alloy has very strong gluing sword characteristic, consequently processing is difficult, and the unstable problem of quality can appear in the hole man-hour, and the precision value in order to guarantee the roughness of impeller is higher, needs frequent change cutter, and the cost is higher. And because the hole is the unthreaded hole, when the boss on the turbo charger rotor shaft inserted the hole, the air that remains in the hole can not discharge, very easily causes the technical problem that the pressure equipment is not in place between turbo charger rotor shaft and the impeller, the faying face can't be pasted closely, still can appear axle and impeller end face beat the out of tolerance, quality unstable factor such as total length out of tolerance still can appear, and still can appear when rotor shaft and impeller carry out vacuum electron beam welding, because of the technical problem that the hole remains the air and causes the explosion hole.
The utility model discloses just produce based on above-mentioned not enough.
[ Utility model ] content
The utility model aims at overcoming the defects of the prior art, providing a simple structure, easy processing, and when being assembled with the boss on the impeller by pressing, the turbocharger rotor shaft with the inner hole exhaust groove can discharge the air in the inner hole.
The utility model discloses a realize through following technical scheme:
a turbocharger rotor shaft having a bore exhaust groove, characterized by: including the axis body 1, the tip of axis body be equipped with the hole 11 that can supply the boss 21 on the impeller 2 to insert, just hole 11 pore wall on be equipped with can be with exhaust groove 12 of hole 11 air escape when the boss 21 inserts.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the exhaust grooves 12 are spirally arranged.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the exhaust groove 12 is an inner spiral groove, the cross section of the inner spiral groove is arc-shaped, the radius R1 is 0.2mm, the processing depth H is 0.1 +/-0.05 mm, and the pitch P is 1.5.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the boss 21 on the impeller 2 is in interference fit or transition fit with the inner hole 11 when inserted into the inner hole 11.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: a chamfer 13 capable of guiding the boss 21 to be inserted into the inner hole 11 is arranged on the shaft body 1 and at the joint of the inner hole 11 and the end face.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the shaft body 1 is made of 42CrMo steel.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the diameter D2 of hole 11 be 5mm, the machining precision of hole 11 is between 0 ~ 0.012mm, just the surface roughness Ra of hole 11 wall is 0.8.
The turbocharger rotor shaft having a bore exhaust groove as described above, characterized in that: the impeller 2 has a first abutting surface 22, and the shaft body 1 has a second abutting surface 14 which can be attached to the first abutting surface 22 when the boss 21 is inserted into the set position of the inner hole 11.
Compared with the prior art, the utility model discloses there is following advantage: the boss that turbo charger rotor shaft and impeller pressed fit each other sets up on the impeller, and the hole sets up on turbo charger rotor shaft, has avoided setting up the hole on the nickel alloy impeller and has leaded to the precision low, problem with high costs. In addition, when the boss of the impeller is pressed into the inner hole of the shaft body, due to the existence of the exhaust grooves in the hole wall of the inner hole, air cannot be compressed in the inner hole all the time, the air can be discharged along with the exhaust grooves, the air in the inner hole is less and less along with vacuumizing during vacuum electron beam welding, the joint surface of the shaft body and the boss can be tightly attached, the technical problems that the press fitting between the shaft body and the impeller is not in place and the joint surface cannot be tightly attached are solved, and the problems that the end face of the rotor shaft and the end face of the impeller are out of tolerance, the total length. More importantly, most of air in the inner hole is discharged, so that the technical problem that the inner hole is easy to explode due to residual air in the inner hole when the rotor shaft and the impeller are welded by the vacuum electron beam is solved.
[ description of the drawings ]
FIG. 1 is one of the schematic views of a turbocharger rotor shaft having a bore vent slot according to the present invention;
FIG. 2 is an enlarged view of area A of FIG. 1;
FIG. 3 is a second schematic view of a turbocharger rotor shaft having an inner bore exhaust groove according to the present invention;
figure 4 is a partial cross-sectional view of the present invention having an inner hole in the inner hole vent slot.
[ detailed description ] embodiments
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1 to 4, the utility model provides a turbocharger rotor shaft with hole air discharge duct, including the axis body 1, the tip of axis body be equipped with and supply boss 21 male hole 11 on the impeller 2, just hole 11 pore wall on be equipped with and can be with hole 11 in air exhaust duct 12 when boss 21 inserts.
The boss 21 that turbo charger rotor shaft and impeller 2 each other press-fit to close sets up on impeller 2, and hole 11 sets up on turbo charger rotor shaft, has avoided setting up hole 11 on the nickel alloy impeller and has leaded to the precision low, problem with high costs. In addition, when the boss 21 of the impeller 2 is pressed into the inner hole 11 of the shaft body 1, air cannot be compressed in the inner hole 11 all the time, and can be discharged along with the exhaust groove 12, and along with vacuumizing during vacuum electron beam welding, air in the inner hole 11 is less and less, so that the joint surface of the shaft body 1 and the impeller 2 can be tightly attached, the technical problems that the press fitting between the shaft body 1 and the impeller 2 is not in place and the joint surface cannot be tightly attached are solved, and the problems of unstable quality such as the runout of the end surfaces of a rotor shaft and the impeller, the over-poor total length and the. And because the air in the inner hole 11 is mostly discharged, the technical problem that the inner hole is easy to cause the explosion pit because the air is remained in the inner hole when the rotor shaft and the impeller are welded by the vacuum electron beam is solved. The crater is a crater formed at the welding position during vacuum electron beam welding, and is a welding defect which should be avoided.
As shown in fig. 1 to 4, the exhaust grooves 12 are spirally formed. The spiral exhaust groove 12 is convenient to process, and air in the inner hole 11 is exhausted from the spiral exhaust groove 12 during vacuum pumping.
As shown in fig. 1 to 4, the exhaust groove 12 is an inner spiral groove, the cross-sectional shape of the inner spiral groove is circular arc, the radius R1 is 0.2mm, the processing depth H is 0.1 ± 0.05mm, and the pitch P is 1.5. The exhaust groove 12 is an internal spiral groove, and the section shape is circular arc, so that the processing is convenient. When the boss 21 is pressed into the inner hole 11 of the shaft body 1, air remaining in the inner hole 11 can be discharged through the inner spiral groove.
As shown in fig. 1 to 4, the boss 21 on the impeller 2 is in interference fit or transition fit with the inner hole 11 when inserted into the inner hole 11, so that the impeller 2 and the shaft body 1 can be connected more firmly after welding.
As shown in fig. 1 to 4, a chamfer 13 capable of guiding the inner hole 11 into which the boss 21 is inserted is provided on the shaft body 1 at the junction between the inner hole 11 and the end surface.
The shaft body 1 is made of 42CrMo steel. The 42CrMo steel belongs to ultrahigh-strength steel, has the advantages of high strength and toughness, good hardenability, no obvious temper brittleness, higher fatigue limit and multiple impact resistance after quenching and tempering, and good low-temperature impact toughness.
The diameter D2 of the inner hole 11 is 5mm as shown in FIGS. 1 to 4, the machining precision of the inner hole 11 is between 0 mm and 0.012mm, namely the diameter D2 of the inner hole 11 is between 5mm and 5.012mm, and the surface roughness Ra of the wall surface of the inner hole 11 is 0.8. The surface roughness Ra of the wall surface of the inner hole 11 is 0.8, and the smoothness of the wall surface of the inner hole 11 is ensured, so when the boss 21 and the inner hole 11 are assembled in a pressing mode, the matched clearance can be minimum, residual air in the inner hole 11 can be discharged to the maximum degree, and the welding quality is ensured.
As shown in fig. 1 to 4, the impeller 2 has a first abutting surface 22, and the shaft body 1 has a second abutting surface 14 which can abut against the first abutting surface 22 when the boss 21 is inserted into the inner hole 11 at a predetermined position.
According to the size of different impellers 2 and axis body 1, can set up the air discharge duct 12 that has different groove depth, different pitch isoparametric, only need change the processing parameter can, need not change the processing cutter even, processing is convenient. When the boss 21 with transition or interference fit is pressed into the inner hole 11, air in the inner hole 11 can be discharged through the exhaust groove 11, so that the joint surfaces of the shaft body 1 and the impeller 2 are tightly attached, and the vertical jumping precision requirement of the end surfaces of the rotor shaft and the impeller and the dynamic balance requirement of 30 ten thousand revolutions per minute can be ensured when the joint surfaces of the shaft body 1 and the impeller 2 are tightly attached.
Claims (8)
1. A turbocharger rotor shaft having a bore exhaust groove, characterized by: including axis body (1), the tip of axis body be equipped with boss (21) male hole (11) on can supplying impeller (2), just hole (11) pore wall on be equipped with can be with exhaust groove (12) of air escape in hole (11) when boss (21) are inserted.
2. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: the exhaust groove (12) is spirally arranged.
3. The turbocharger rotor shaft having a bore exhaust groove of claim 2, wherein: the exhaust groove (12) is an inner spiral groove, the cross section of the inner spiral groove is arc-shaped, the radius R1 is 0.2mm, the processing depth H is 0.1 +/-0.05 mm, and the pitch P is 1.5.
4. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: the boss (21) on the impeller (2) is in interference fit or transition fit with the inner hole (11) when being inserted into the inner hole (11).
5. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: a chamfer (13) capable of guiding the boss (21) to be inserted into the inner hole (11) is arranged on the shaft body (1) and at the joint of the inner hole (11) and the end face.
6. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: the shaft body (1) is made of 42CrMo steel.
7. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: the diameter D2 of hole (11) be 5mm, the machining precision of hole (11) is between 0 ~ 0.012mm, just the surface roughness Ra of hole (11) wall is 0.8.
8. The turbocharger rotor shaft having a bore exhaust groove of claim 1, wherein: the impeller (2) is provided with a first abutting surface (22), and the shaft body (1) is provided with a second abutting surface (14) which can be attached to the first abutting surface (22) when the boss (21) is inserted into the set position of the inner hole (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022901243.6U CN213655225U (en) | 2020-12-05 | 2020-12-05 | Turbocharger rotor shaft with inner hole exhaust groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022901243.6U CN213655225U (en) | 2020-12-05 | 2020-12-05 | Turbocharger rotor shaft with inner hole exhaust groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213655225U true CN213655225U (en) | 2021-07-09 |
Family
ID=76688708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022901243.6U Expired - Fee Related CN213655225U (en) | 2020-12-05 | 2020-12-05 | Turbocharger rotor shaft with inner hole exhaust groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213655225U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888420A (en) * | 2022-07-14 | 2022-08-12 | 盛瑞传动股份有限公司 | Assembly method of planet carrier copper sleeve assembly |
| CN115056156A (en) * | 2022-07-21 | 2022-09-16 | 上海惠而顺精密工具股份有限公司 | Split type grinding tool welding method and grinding tool thereof |
-
2020
- 2020-12-05 CN CN202022901243.6U patent/CN213655225U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888420A (en) * | 2022-07-14 | 2022-08-12 | 盛瑞传动股份有限公司 | Assembly method of planet carrier copper sleeve assembly |
| CN115056156A (en) * | 2022-07-21 | 2022-09-16 | 上海惠而顺精密工具股份有限公司 | Split type grinding tool welding method and grinding tool thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210709 |