CN218454828U - Axial balance high-speed rotating rotor assembly - Google Patents
Axial balance high-speed rotating rotor assembly Download PDFInfo
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- CN218454828U CN218454828U CN202222551293.5U CN202222551293U CN218454828U CN 218454828 U CN218454828 U CN 218454828U CN 202222551293 U CN202222551293 U CN 202222551293U CN 218454828 U CN218454828 U CN 218454828U
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Abstract
An axial balance high-speed rotating rotor assembly comprises a rotor, wherein one end of the rotor is provided with a thrust disc, a compression end sealing sleeve ring and a compression impeller, the other end of the rotor is provided with an expansion end sealing sleeve ring and an expansion impeller, the thrust disc is tightly pressed on a stepped end face at one end of the rotor by the compression end sealing sleeve ring, the compression impeller tightly presses the compression end sealing sleeve ring on the end face of the thrust disc, and the outer end of the compression impeller is tightly pressed and fixed by a compression nut which is arranged on the rotor through threads; the expansion impeller compresses the expansion end sealing lantern ring on the stepped end face at the other end of the rotor, and the outer end of the expansion impeller is fixedly compressed by a compression nut which is installed on the rotor through threads. Compress tightly compression impeller, compression end sealing sleeve ring and thrust dish in proper order in the one end of rotor through gland nut, compress tightly expansion impeller and expansion end sealing sleeve ring in proper order in the other end of rotor through gland nut, simplified technology, equipment convenient and fast need not to carry out the trompil to the rotor, has guaranteed rotor rigidity.
Description
The technical field is as follows:
the utility model relates to an axial balance high-speed rotating rotor assembly.
Background art:
in a high-speed centrifugal compressor, a rotor assembly is a working part of the high-speed centrifugal compressor and mainly comprises a rotor, an impeller, a thrust disc and other elements, and the rotor drives the impeller to rotate at a high speed to work on gas so that the gas obtains pressure energy and speed energy. In the existing rotor assembly, the thrust disk is installed on the mandrel through screws, and threaded holes need to be machined in the mandrel, so that the machining is complex, the installation is troublesome, and the rigidity of the mandrel can be influenced. In addition, the structural form of the rotor plays a role in lifting the rotating speed. In the traditional rotor, magnetic steel is arranged inside the traditional rotor, and the magnetic steel is coated outside the magnetic steel through a high-temperature resistant non-magnetic material, but the existing rotor mounting structure is complex, the rotor in the high-speed centrifugal compressor is supported through a radial air bearing, the outer surface of the rotor is in contact with the air bearing, and the rotor is easily abraded after a long time, so that the rotation precision is influenced; when the rotor is high in rotating speed for a long time, heat can be generated outside the rotor, the temperature of the rotor is increased, and when the temperature of the rotor is too high, the rotor is easy to deform, and the service life of the rotor is influenced. In addition, the existing rotor has poor bilateral symmetry, different weights on the left side and the right side and poor balance, and when the rotor rotates at high speed under the condition of hundreds of thousands of rotating speeds, the difference between the left side and the right side is amplified, the stability of the rotor is influenced, and the improvement of the rotating speed of the rotor is also influenced to a certain extent.
In summary, the rotor assembly problem of the high-speed centrifugal compressor has become an urgent technical problem to be solved in the industry.
The utility model has the following contents:
the utility model discloses a remedy prior art not enough, provide an axial balance high-speed rotating rotor assembly, solved in the past set up the problem that the screw hole technology is complicated, the equipment is troublesome, influence dabber rigidity at the dabber.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
an axial balance high-speed rotating rotor assembly comprises a rotor, wherein one end of the rotor is provided with a thrust disc, a compression end sealing sleeve ring and a compression impeller, the other end of the rotor is provided with an expansion end sealing sleeve ring and an expansion impeller, the thrust disc is tightly pressed on a stepped end face at one end of the rotor by the compression end sealing sleeve ring, the compression impeller tightly presses the compression end sealing sleeve ring on the end face of the thrust disc, and the outer end of the compression impeller is tightly pressed and fixed by a compression nut which is arranged on the rotor through threads; the expansion impeller compresses the expansion end sealing lantern ring on the stepped end face at the other end of the rotor, and the outer end of the expansion impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
The sum of the weights of the thrust disc, the compression end sealing lantern ring and the compression impeller is the same as the sum of the weights of the expansion end sealing lantern ring and the expansion impeller.
The rotor comprises a middle sleeve, magnetic steel is installed in the middle sleeve, mandrels are respectively arranged at two ends of the magnetic steel, a pressing shaft sleeve is arranged on the outer side of one end, close to the magnetic steel, of the mandrel and is fixedly connected with the middle sleeve, the pressing shaft sleeve is used for pressing and fixing the mandrel and the magnetic steel, the pressing shaft sleeve and the middle sleeve are made of high-temperature-resistant non-magnetic materials, and a wear-resistant coating is arranged on the outer surface of the pressing shaft sleeve.
The magnetic steel is arranged in the middle of the inner part of the middle sleeve, and the core shafts and the pressing shaft sleeves at the two ends of the magnetic steel are symmetrically arranged.
The outer surface of the mandrel is provided with a shoulder, the inner side of the compressing shaft sleeve is provided with a baffle table, and the mandrel and the compressing shaft sleeve are in interference fit press-fitting connection.
The compressing shaft sleeve is inserted into the middle sleeve, the compressing shaft sleeve and the middle sleeve are in press fit and connection in an interference fit mode, and the outer edge of the connection position is welded and fixed.
The mandrel is flush with the end face of one end, close to the magnetic steel, of the pressing shaft sleeve and is in contact fit with the end face of the magnetic steel.
The outer surface of one end of the mandrel, which is far away from the magnetic steel, is provided with a plurality of annular grooves for reducing weight.
The material of the compressing shaft sleeve and the middle sleeve comprises nickel-based high-temperature alloy.
The material of the mandrel comprises 9Cr18, 9Cr18Mo or 9Cr18MoV stainless steel.
The utility model adopts the above technical scheme, have following advantage:
compress tightly compression impeller, compression end sealing sleeve ring and thrust dish in proper order in the one end of rotor through gland nut, compress tightly expansion impeller and expansion end sealing sleeve ring in proper order in the other end of rotor through gland nut, simplified technology, equipment convenient and fast need not to carry out the trompil to the rotor, has guaranteed rotor rigidity.
The central shafts on the two sides are respectively pressed and fixed with the magnetic steel through the pressing shaft sleeves on the two sides, and then the pressing shaft sleeves are fixedly connected with the middle sleeve, so that the assembly process is simplified, the assembly efficiency is improved, the outer surface of each pressing shaft sleeve is provided with a wear-resistant coating, the wear-resistant coating is in contact with the radial air bearing, the wear resistance is greatly improved, the abrasion of the rotor is avoided, the rotation precision is improved, the pressing shaft sleeves and the middle sleeve are made of high-temperature-resistant non-magnetic materials, the conditions of heating outside the rotor and temperature rise of the rotor are avoided, and the service life of the rotor is ensured; the two sides of the rotor are symmetrically arranged, so that the weight is the same, the balance is good, the stability is good during high-speed rotation, and the improvement of the rotating speed is facilitated.
Description of the drawings:
fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
In the figure, the device comprises a middle sleeve 1, an intermediate sleeve 2, magnetic steel 3, a mandrel 4, a compression shaft sleeve 5, an annular groove 6, a rotor 7, a thrust disk 8, a compression end sealing lantern ring 9, a compression impeller 10, an expansion end sealing lantern ring 11, an expansion impeller 12 and a compression nut.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
As shown in fig. 1-2, an axially balanced high-speed rotating rotor assembly includes a rotor 6, one end of the rotor 6 is provided with a thrust disk 7, a compression end sealing collar 8 and a compression impeller 9, the other end is provided with an expansion end sealing collar 10 and an expansion impeller 11, the compression end sealing collar 8 presses the thrust disk 7 against a stepped end face of one end of the rotor 6, the compression impeller 9 presses the compression end sealing collar 8 against an end face of the thrust disk 7, and an outer end of the compression impeller 9 is pressed and fixed by a pressing nut 12 which is installed on the rotor 6 through threads; the expansion impeller 11 presses the expansion end sealing lantern ring 10 on the stepped end face at the other end of the rotor 6, and the outer end of the expansion impeller 11 is pressed and fixed through a pressing nut 12 which is installed on the rotor 6 through threads. Specifically, the thrust disk 7 and the compression end sealing lantern ring 8 are installed on the compression shaft sleeve 4 at one end of the rotor 6, the compression impeller 9 is installed on the mandrel 3 at one end of the rotor 6, the expansion end sealing lantern ring 10 is installed on the compression shaft sleeve 4 at the other end of the rotor 6, the expansion impeller 11 is installed on the mandrel 3 at the other end of the rotor 6, and the compression nut 12 is also installed on the mandrel 3 in a threaded manner.
The sum of the weights of the thrust disc 7, the compression end sealing sleeve ring 8 and the compression impeller 9 is the same as the sum of the weights of the expansion end sealing sleeve ring 10 and the expansion impeller 11, so that the balance and stability during high-speed rotation are ensured.
The rotor 6 comprises a middle sleeve 1, a magnetic steel 2 is installed in the middle sleeve 1, two ends of the magnetic steel 2 are respectively provided with a mandrel 3, the outer side of one end, close to the magnetic steel 2, of the mandrel 3 is provided with a pressing shaft sleeve 4, the pressing shaft sleeve 4 is fixedly connected with the middle sleeve 1, the pressing shaft sleeve 4 is used for pressing and fixing the mandrel 3 and the magnetic steel 2, the assembling process is simplified, the assembling efficiency is improved, the pressing shaft sleeve 4 and the middle sleeve 1 are made of high-temperature-resistant non-magnetic materials, the situations of heating outside the rotor and temperature rise of the rotor are avoided, and the service life of the rotor is ensured; the outer surface of the compressing shaft sleeve 4 is provided with a wear-resistant coating which is contacted with the radial air bearing, so that the wear resistance is greatly improved.
The outer surface of the mandrel 3 is provided with a shaft shoulder, the inner side of the compressing shaft sleeve 4 is provided with a baffle table, and the mandrel 3 and the compressing shaft sleeve 4 are in interference fit press-fitting connection.
The compressing shaft sleeve 4 is inserted into the middle sleeve 1, the compressing shaft sleeve 4 and the middle sleeve 1 are in interference fit press-fitting connection, and the outer edge of the connection part is welded and fixed to increase the connection strength.
Dabber 3 flushes and cooperates with magnet steel 2 terminal surface contact with the one end terminal surface that compresses tightly axle sleeve 4 and is close to magnet steel 2, makes overall structure compacter, and when dabber 3 receives external force to strike, face and face area of contact between dabber 3 and the magnet steel 2 are big moreover, can avoid magnet steel 2 atress to break.
The dabber 3 is kept away from the one end surface of magnet steel 2 and is equipped with a plurality of ring channel 5 that is used for the weight reduction, is favorable to the promotion of rotational speed more after the whole weight reduction.
The material of the compressing shaft sleeve 4 and the intermediate sleeve 1 comprises nickel-based high-temperature alloy, wherein the nickel-based high-temperature alloy takes nickel as a base body (the content is generally more than 50 percent) and has high strength and good oxidation resistance and fuel gas corrosion resistance in the range of 650-1000 ℃. Specifically, the utility model discloses can adopt GH4145 alloy, belong to high temperature resistant not magnetic material, GH4145 alloy has good corrosion-resistant and oxidation resistance, has higher intensity below 800 ℃, has better resistant laxity performance below 540 ℃, still has good formability and welding performance simultaneously.
The material of the mandrel 3 comprises 9Cr18, 9Cr18Mo or 9Cr18MoV stainless steel, and has high hardness, good corrosion resistance and strong toughness.
The wear-resistant coating comprises a titanium nitride coating, and is high in hardness, good in wear resistance, high-temperature resistant, good in stability when in contact with the radial air bearing and long in service life.
The working principle is as follows:
during operation, the rotor 6 drives the compression impeller 9 to rotate at a high speed for pressurizing air and delivering the air to the fuel cell, and the expansion impeller 11 is used for recovering the gas energy discharged by the fuel cell stack and providing assistance for the rotor 6. The sealing of compression chamber and motor chamber is realized with the diffuser cooperation of compression end to the sealed lantern ring 8 of compression end, and the sealing of expansion chamber and motor chamber is realized with the director cooperation of expansion end to the sealed lantern ring 10 of expansion end.
The above-mentioned embodiment can not be regarded as right the utility model discloses the restriction of scope, to the technical person in this technical field, it is right the utility model discloses any alternative improvement or transform that the embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are known to those skilled in the art.
Claims (10)
1. The utility model provides an axial balance high-speed rotating rotor assembly which characterized in that: the rotor comprises a thrust disc, a compression end sealing lantern ring and a compression impeller, wherein one end of the rotor is provided with the thrust disc, the compression end sealing lantern ring and the compression impeller, the other end of the rotor is provided with an expansion end sealing lantern ring and the expansion impeller, the thrust disc is tightly pressed on the stepped end face of one end of the rotor by the compression end sealing lantern ring, the compression impeller tightly presses the compression end sealing lantern ring on the end face of the thrust disc, and the outer end of the compression impeller is tightly pressed and fixed by a compression nut which is arranged on the rotor through threads; the expansion impeller compresses the expansion end sealing lantern ring on the stepped end face at the other end of the rotor, and the outer end of the expansion impeller is fixedly compressed by a compression nut which is installed on the rotor through threads.
2. The axially balanced, high speed rotary rotor assembly of claim 1, wherein: the sum of the weights of the thrust disc, the compression end sealing lantern ring and the compression impeller is the same as the sum of the weights of the expansion end sealing lantern ring and the expansion impeller.
3. The axially balanced high speed rotary rotor assembly of claim 1, further comprising: the rotor comprises a middle sleeve, magnetic steel is installed in the middle sleeve, mandrels are arranged at two ends of the magnetic steel respectively, a pressing shaft sleeve is arranged on the outer side of one end, close to the magnetic steel, of each mandrel and fixedly connected with the middle sleeve, the pressing shaft sleeve is used for fixedly pressing the mandrels and the magnetic steel, the pressing shaft sleeve and the middle sleeve are made of high-temperature-resistant non-magnetic materials, and a wear-resistant coating is arranged on the outer surface of the pressing shaft sleeve.
4. An axially balanced high speed rotary rotor assembly according to claim 3, further comprising: the magnetic steel is arranged in the middle of the inner part of the middle sleeve, and the mandrels at two ends of the magnetic steel and the pressing shaft sleeves are symmetrically arranged.
5. The axially balanced high speed rotary rotor assembly of claim 3, further comprising: the outer surface of the mandrel is provided with a shoulder, the inner side of the compression shaft sleeve is provided with a stop table, and the mandrel and the compression shaft sleeve are in press fit and connection in an interference fit manner.
6. The axially balanced high speed rotary rotor assembly of claim 3, further comprising: the compressing shaft sleeve is inserted into the middle sleeve, the compressing shaft sleeve and the middle sleeve are in interference fit press-fitting connection, and the outer edge of the connection position is welded and fixed.
7. An axially balanced high speed rotary rotor assembly according to claim 3, further comprising: the dabber flushes with the one end terminal surface that compresses tightly the axle sleeve and is close to the magnet steel and cooperates with the contact of magnet steel terminal surface.
8. The axially balanced high speed rotary rotor assembly of claim 3, further comprising: the outer surface of one end of the mandrel, which is far away from the magnetic steel, is provided with a plurality of annular grooves for reducing weight.
9. The axially balanced high speed rotary rotor assembly of claim 3, further comprising: the material of the compression shaft sleeve and the middle sleeve comprises nickel-based high-temperature alloy.
10. The axially balanced high speed rotary rotor assembly of claim 3, further comprising: the material of the mandrel comprises 9Cr18, 9Cr18Mo or 9Cr18MoV stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222551293.5U CN218454828U (en) | 2022-09-26 | 2022-09-26 | Axial balance high-speed rotating rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222551293.5U CN218454828U (en) | 2022-09-26 | 2022-09-26 | Axial balance high-speed rotating rotor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218454828U true CN218454828U (en) | 2023-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222551293.5U Active CN218454828U (en) | 2022-09-26 | 2022-09-26 | Axial balance high-speed rotating rotor assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218454828U (en) |
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2022
- 2022-09-26 CN CN202222551293.5U patent/CN218454828U/en active Active
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