Compressor sleeved rotor

Abstract

The invention discloses a sleeved rotor of a gas compressor, and relates to the technical field of rotor system equipment. The motor specifically comprises a low-temperature material rotor, a high-temperature material rotor and a rotor limiting device, the low-temperature material rotor is a main rotating shaft, the high-temperature material rotor is a hollow shaft, the low-temperature material rotor is sleeved with the high-temperature material rotor, and meanwhile the inner control face of the low-temperature material rotor and the inner control face of the high-temperature material rotor are meshed with each other; the rotor limiting device is installed on the downstream of the high-temperature material rotor and limits the axial displacement of the high-temperature material rotor, and the low-temperature area moving blades and the high-temperature area moving blades are assembled on the low-temperature material rotor and the high-temperature material rotor respectively. The compressor test piece integral forging rotor is divided into two sections, the rotors made of different materials are adopted corresponding to the working temperatures of different areas of the compressor, the requirement for different temperatures of different sections is met, and meanwhile different rotors made of high-temperature materials can be machined to meet the requirement for change of the number of stages of the compressor or the number of outlet-stage blades of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of rotor system equipment, and in particular to a compressor set rotor. Background Art

[0002] As the core component of the compressor section of a gas turbine engine, the compressor rotor is responsible for compressing the air and increasing its pressure, providing the engine with the necessary compressed air. Its structure is sophisticated, mainly composed of a series of rotating blades, which cleverly guide the air through the compressor section. When the compressor rotor rotates at high speed, the blades effectively compress the air and increase its pressure. In a gas turbine engine, the rotation speed and efficiency of the compressor rotor are directly related to the performance of the compressor. Once the compressor rotor fails or is damaged, it will seriously affect the operation of the compressor section, and then affect the performance of the entire engine.

[0003] When conducting component tests on heavy-duty gas turbine compressors, integral forged rotors are usually used, which is convenient for the preparation and forging of blanks, and has low costs and fast progress. However, when the compressor pressure is relatively high, the operating temperatures of its inlet and outlet stages are quite different, and there are different requirements for materials. In addition to the requirements of the bearing lubricating oil system, the inlet and outlet ends of the compressor test rotor are both in the low temperature zone, and only the middle position belongs to the high temperature zone. Figure 1 As shown. The rotor in the low temperature zone requires the material to have sufficient strength at low temperatures and good low temperature toughness; the rotor in the high temperature zone requires the material to still maintain sufficient tensile properties at high temperatures.

[0004] For the compressor test rotor with a relatively high pressure ratio, when using a whole forged rotor, if only the material requirements in the low temperature zone are considered, the operating temperature of the compressor rear stage may exceed the allowable temperature of the material, causing high temperature failure of the rotor. If only the high temperature material requirements are considered, the rotor part working in the low temperature area may face the problem of low temperature brittle transition, resulting in brittle failure. If segmented heat treatment is used, the whole forged rotor is usually divided into an upstream low temperature zone and a downstream high temperature zone, which cannot meet the requirements of the low temperature zone at the outlet end bearing installation position.

[0005] The existing patent CN112253259A discloses a turbine rotor system, which includes a rotating shaft, and a first low temperature zone, a high temperature zone and a second low temperature zone are sequentially arranged along the axial direction of the rotating shaft; a balancing disc is arranged in the first low temperature zone of the rotating shaft, and a first seal is sleeved on the balancing disc; a first air inlet is arranged in the first low temperature zone of the rotating shaft, and the first air inlet is used to connect the cooling air source to cool the first seal; a turbine rotor is arranged in the high temperature zone of the rotating shaft, and blades are arranged on the outer periphery of the turbine rotor; a second air inlet is arranged in the high temperature zone of the rotating shaft, and the second air inlet is used to provide high temperature gas to drive the blades to drive the rotating shaft to rotate. The turbine rotor system of the present invention can reduce the leakage of the balancing disc, shorten the length of the balancing disc and thus shorten the span of the rotating shaft, thereby improving the safety of the unit.

[0006] The existing patent CN221942569U discloses a rotor system, a gas turbine, an air compressor and a heat pump, including a rotating shaft, a ball bearing and a dynamic bearing. The two ends of the rotating shaft are respectively a first mounting end and a second mounting end, and the shaft diameter ratio value of the first mounting end to the second mounting end ranges from 1:2 to 1:40; the ball bearing is installed at the first mounting end of the rotating shaft, and the dynamic bearing is installed at the second mounting end of the rotating shaft. In this solution, the first mounting end of the rotating shaft is in a low-temperature environment, and the second mounting end of the rotating shaft is in a high-temperature environment. The ball bearing is arranged on the first mounting end, and the dynamic bearing is arranged on the second mounting end, wherein the dynamic bearing can be an air bearing, which not only meets the operating needs but also saves costs in short-term operating conditions or one-time operating conditions.

[0007] In summary, the above two existing patents do not solve the problem in the prior art that the compressor using an integrally forged rotor may cause high temperature failure or brittle failure during component testing. Summary of the invention

[0008] Based on the above technical problems, the present invention proposes a compressor rotor set to solve the problem in the prior art that the compressor uses an integral forged rotor which may cause high temperature failure or brittle failure during component testing.

[0009] To achieve the above-mentioned purpose, the present invention proposes a compressor rotor set. The specific technical solution is as follows:

[0010] A compressor rotor set includes a low-temperature material rotor, low-temperature zone moving blades, a high-temperature material rotor and high-temperature zone moving blades, the low-temperature material rotor being the main rotating shaft, the low-temperature material rotor corresponding to a first low-temperature zone, a high-temperature zone and a second low-temperature zone in the axial direction, the shaft diameter of the low-temperature material rotor located in the first low-temperature zone being larger than the shaft diameters located in the high-temperature zone and the second low-temperature zone, the high-temperature material rotor being a hollow shaft, the high-temperature material rotor being set in the high-temperature zone of the low-temperature material rotor, the low-temperature zone moving blades being mounted on the low-temperature material rotor located in the first low-temperature zone, and the high-temperature zone moving blades being mounted on the high-temperature material rotor.

[0011] Furthermore, the low-temperature material rotor uses a low-temperature material, and the high-temperature material rotor uses a high-temperature material, and the applicable temperature of the low-temperature material is lower than the applicable temperature of the high-temperature material.

[0012] Furthermore, the applicable temperature of the low-temperature material is -20 to 400°C, and the applicable temperature of the high-temperature material is 400 to 800°C.

[0013] Furthermore, it also includes a rotor limiting device, which is used to limit the axial movement of the high-temperature material rotor.

[0014] Furthermore, the rotor limiting device includes a rotor limiting boss on the low-temperature material rotor, and the rotor limiting boss is located between the high-temperature zone and the second low-temperature zone.

[0015] Furthermore, the rotor limiting device also includes a balancing disk, and the balancing disk is installed between the high-temperature material rotor and the rotor limiting boss.

[0016] Furthermore, the balancing disk includes two semicircular ring disks, the inner side walls of the semicircular ring disks are provided with balancing disk lock key grooves, and the end surfaces at both ends of the semicircular ring disks are provided with bolt holes.

[0017] Furthermore, a shaft lock keyway is provided on the low-temperature material rotor at a location where the balancing disc is mounted, and a lock key is installed in the shaft lock keyway.

[0018] Furthermore, a concave stop is provided on one side of the balancing disc close to the high temperature material rotor, and a convex stop is provided on one end of the high temperature material rotor close to the balancing disc.

[0019] Furthermore, it also includes a spring, and a spring groove is provided on the axial end surface of the convex stop, and the spring is installed in the spring groove.

[0020] Furthermore, it also includes a sealing ring, which is installed between the convex stopper and the concave stopper.

[0021] Furthermore, the balancing disk is an annular disk, the inner ring wall of the annular disk is provided with an internal thread, and the low-temperature material rotor is provided with an external thread at a location where the balancing disk is mounted in cooperation.

[0022] Furthermore, the low-temperature material rotor and the high-temperature material rotor are installed by means of a torque transmission key.

[0023] Furthermore, the circumferential surface of the low-temperature material rotor located in the high-temperature zone is provided with a plurality of axial torque transmission teeth, and the torque transmission teeth are distributed at equal intervals along the circumferential direction; the inner side of the high-temperature material rotor is provided with a plurality of torque transmission tooth grooves along the circumferential direction, and the torque transmission tooth grooves are distributed at equal intervals along the circumferential direction.

[0024] Furthermore, the axial matching surfaces of the low-temperature material rotor and the high-temperature material rotor are conical surfaces.

[0025] Furthermore, the low-temperature material rotor is provided with a plurality of annular discs on its circumferential surface in the first low-temperature zone, and the low-temperature zone moving blades are installed on the discs at equal intervals along the circumferential direction; the high-temperature material rotor is provided with a plurality of annular discs on its outer circumferential surface, and the high-temperature zone moving blades are installed on the discs at equal intervals along the circumferential direction.

[0026] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0027] 1. The present invention proposes a compressor rotor set, which uses a low-temperature material rotor as the main rotating shaft, and a high-temperature material rotor is mounted on the low-temperature material rotor. The two rotors are made of materials suitable for different temperatures, so that the same rotor can meet the different temperature requirements of different sections.

[0028] 2. The present invention proposes a compressor rotor set, in which different rotors are meshed in a suitable matching manner, and have the functions of centering and torque transmission.

[0029] 3. The compressor rotor set proposed by the present invention is designed with a rotor limiting device to press the rotors of different sections against each other, thereby ensuring that the rotor set can work stably.

[0030] 4. The compressor rotor set proposed in the present invention can meet the needs of changing the number of compressor stages or the number of outlet stage blades by processing and installing rotors made of different high-temperature materials, and can be used for scheme comparison tests to save test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a structural schematic diagram of a compressor using an integrally forged rotor in the background technology of the present invention;

[0033] Figure 2 This is an overall schematic diagram of a compressor rotor set proposed by the present invention;

[0034] Figure 3 A split schematic diagram of a compressor rotor set proposed by the present invention;

[0035] Figure 4 A vertical cross-sectional schematic diagram of a compressor rotor set provided by the present invention;

[0036] Figure 5 A partial vertical cross-sectional schematic diagram of a compressor rotor set provided by the present invention.

[0037] Figure markings: 1-low-temperature material rotor, 2-low-temperature zone moving blades, 3-high-temperature zone moving blades, 4-high-temperature material rotor, 5-sealing ring, 6-spring, 7-balancing disk, 8-locking key, 9-bolt, 10-nut, 11-torque transmission tooth, 12-torque transmission tooth groove, 13-shaft lock key groove, 14-balancing disk lock key groove, 15-bolt hole, 16-axial mating surface, 17-rotor torque transmission mating surface, 18-rotor limiting boss. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0040] In order to solve the problem in the prior art that the use of integrally forged rotors in compressors may cause high temperature failure or brittle failure during component testing, the present invention proposes a compressor rotor set.

[0041] To achieve the above-mentioned purpose, the present invention proposes a compressor rotor set, which divides the common compressor forged rotor into a low-temperature material rotor and a high-temperature material rotor, and assembles low-temperature zone moving blades and high-temperature zone moving blades respectively. The low-temperature material rotor is the main rotating shaft, and its shaft diameter becomes smaller in the high-temperature zone. The high-temperature material rotor is a hollow shaft and can be mounted on the low-temperature material rotor. The low-temperature material rotor and the high-temperature material rotor use materials suitable for different working temperatures, so that the same rotor can meet the different temperature requirements of different sections. The low-temperature material rotor uses low-temperature materials, and the low-temperature materials are suitable for low-temperature working environments, that is, they can maintain their good performance in low-temperature environments; the high-temperature material rotor uses high-temperature materials, and the high-temperature materials are suitable for high-temperature working environments, that is, they can maintain good performance in high-temperature environments. In this embodiment, the working environment temperature suitable for the low-temperature material is -20 to 400°C, and the working environment temperature suitable for the high-temperature material is 400-800°C.

[0042] Optionally, the low-temperature rotor material includes 30Cr2Ni4MoV, 30Cr1Mo1V, 34CrNi3Mo, etc.

[0043] Optionally, the materials selected for the high temperature rotor include 1Cr12Ni3MoVN, 12Cr10NiMoWVNbN, 13Cr9Mo2Co1NiVNbNB, etc.

[0044] See also Figure 2-Figure 5 As shown in FIG. 1 , a compressor rotor set is specifically exemplified. Figure 2 As shown, the compressor rotor assembly mainly includes a low-temperature material rotor 1, a high-temperature material rotor 4 and a balancing disk 7. Figure 3 As shown, the low temperature material rotor 1 is the main rotating shaft, the high temperature material rotor 4 is a hollow shaft, the high temperature material rotor 4 is mounted on the low temperature material rotor 1, and the balancing disk 7 is located downstream of the high temperature material rotor 4 to limit the axial displacement of the high temperature material rotor 4.

[0045] As a specific embodiment of the cryogenic material rotor 1, see Figure 2 and Figure 3As shown, the cryogenic material rotor 1 is the main rotating shaft, which corresponds to the first low temperature zone, the high temperature zone and the second low temperature zone from left to right in the axial direction. The shaft diameter of the cryogenic material rotor 1 in the first low temperature zone is larger than that in the high temperature zone, and the shaft diameter in the high temperature zone is larger than that in the second low temperature zone. The cryogenic material rotor 1 is located on the outer side of the first low temperature zone with a plurality of annular wheels, which are used to install the low temperature zone rotor blades 2. Figure 4 As shown, the low temperature material rotor 1 is provided with a plurality of axial torque transmission teeth 11 on the circumferential outer side of the high temperature zone, and the torque transmission teeth 11 are evenly spaced along the circumferential direction, and are used to cooperate with the high temperature material rotor 4 to play the role of torque transmission. An annular rotor limiting boss 18 is provided on the low temperature material rotor 1 between the high temperature zone and the second low temperature zone, and is used to limit the axial displacement of the high temperature material rotor 4.

[0046] As a specific implementation of the high temperature material rotor 4, refer to Figure 3 As shown, the high temperature material rotor 4 is a hollow shaft, and its outer circumference is a plurality of annular wheels, and the annular wheels are used to install the high temperature zone moving blades 3. Figure 4 As shown, a plurality of axial torque transmission tooth grooves 12 are provided on the inner side of the high temperature material rotor 4, and the plurality of torque transmission tooth grooves 12 are evenly spaced along the circumferential direction. The high temperature material rotor 4 is mounted on the low temperature material rotor 1, and the torque transmission tooth grooves 12 and the torque transmission teeth 11 are installed in coordination.

[0047] Optional, see Figure 4 As shown, the axial mating surface 16 of the low temperature material rotor 1 and the high temperature material rotor 4 is a rotor centering mating conical surface, which is used to realize the centering of the low temperature material rotor 1 and the high temperature material rotor 4. Preferably, the rotor centering mating conical surface can be tilted in the opposite direction, which has the advantage that the high temperature material rotor 4 can be clamped in the low temperature material rotor 1 when it expands thermally.

[0048] Optionally, all mating surfaces of the low-temperature material rotor 1 and the high-temperature material rotor 4 are provided with a thermal insulation coating or a protective layer with low hardness, so that the low-temperature material rotor 1 and the high-temperature material rotor 4 can fit more tightly.

[0049] As a specific embodiment of the balancing plate 7, refer to Figure 4 As shown, the balancing disc 7 is installed between the high temperature material rotor 4 and the rotor limiting boss 18 to further limit the axial displacement of the high temperature material rotor 4 .

[0050] In some embodiments, the balancing disk 7 includes two semicircular ring disks, and a balancing disk lock key groove 14 is provided on the inner side of the semicircular ring disk, and bolt holes 15 are provided on the end faces of both ends of the ring body. A shaft lock key groove 13 is provided at the installation position corresponding to the balancing disk 7 on the low-temperature material rotor 1, and a protruding lock key 8 is installed in the shaft lock key groove 13. The two semicircular ring disks of the balancing disk 7 are correspondingly installed on the low-temperature material rotor 1, and the balancing disk lock key groove 14 is engaged with the lock key 8 on the low-temperature material rotor 1 to limit the circumferential relative movement of the two semicircular ring disks. The two ends of the ring body are fixed together by bolts 9 and nuts 10. A concave stop is provided on the side of the balancing disk 7 close to the high-temperature material rotor 4, and a convex stop is provided on the end of the high-temperature material rotor 4 close to the balancing disk 7. The convex stop and the concave stop are tightly matched to realize the positioning and fixation of the high-temperature material rotor 4. A spring 6 is also provided between the convex stop and the concave stop. An annular groove is provided on the axial end face of the convex stop of the high temperature material rotor 4. The spring is placed in the annular groove, with the left side pressed against the high temperature material rotor 4 and the right side pressed against the balancing disk 7, pressing the high temperature material rotor 4 and the low temperature material rotor 1 tightly, further limiting the axial displacement of the high temperature material rotor 4, and used to compensate for the gap caused by thermal expansion. A sealing ring 5 is also provided between the convex stop and the concave stop, which prevents high temperature airflow from entering the shaft diameter gap and protects the low temperature material rotor 1 and the spring 6.

[0051] In other embodiments, the balancing disc 7 is an annular disc, the inner side wall of which is processed with an internal thread, and the low temperature material rotor 1 is provided with an external thread at the matching shaft diameter corresponding to the balancing disc 7. After the high temperature material rotor 4 is installed, the balancing disc 7 with the internal thread is screwed onto the low temperature material rotor 1, and a tightening torque is applied to press the high temperature material rotor 4 and the low temperature material rotor 1, and then the interference installation rotor limit boss 18 is installed. The balancing disc 7 does not require matching components such as springs, sealing rings, lock keys, bolts and nuts. The balancing disc 7 can be installed in a hot way, and the inner hole of the balancing disc is enlarged by heating, and it is screwed onto the low temperature material rotor 1, and further clamped after cooling.

[0052] The above-mentioned compressor rotor set provided by the present invention has two rotors made of materials suitable for different temperatures, so that the same rotor can meet the different temperature requirements of different sections. At the same time, by processing and installing rotors made of different high-temperature materials, the needs of changing the number of compressor stages or the number of outlet stage blades can be met, which is used for scheme comparison tests to save test costs.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0055] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A compressor rotor set, characterized in that: The invention comprises a low-temperature material rotor (1), low-temperature zone moving blades (2), a high-temperature material rotor (4) and high-temperature zone moving blades (3); the low-temperature material rotor (1) is the main rotating shaft; the low-temperature material rotor (1) corresponds to a first low-temperature zone, a high-temperature zone and a second low-temperature zone in sequence along the axial direction; the shaft diameter of the low-temperature material rotor (1) located in the first low-temperature zone is larger than the shaft diameters located in the high-temperature zone and the second low-temperature zone; the high-temperature material rotor (4) is a hollow shaft; the high-temperature material rotor (4) is sleeved in the high-temperature zone of the low-temperature material rotor (1); the low-temperature zone moving blades (2) are mounted on the low-temperature material rotor (1) located in the first low-temperature zone; and the high-temperature zone moving blades (3) are mounted on the high-temperature material rotor (4).

2. The compressor rotor set according to claim 1, characterized in that: The low-temperature material rotor (1) is made of low-temperature material, and the high-temperature material rotor (4) is made of high-temperature material. The applicable temperature of the low-temperature material is lower than the applicable temperature of the high-temperature material.

3. The compressor rotor set according to claim 2, characterized in that: The applicable temperature of the low-temperature material is -20 to 400°C, and the applicable temperature of the high-temperature material is 400 to 800°C.

4. The compressor rotor set according to any one of claims 1 to 3, characterized in that: It also comprises a rotor limiting device, which is used to limit the axial movement of the high temperature material rotor (4).

5. The compressor rotor set according to claim 4, characterized in that: The rotor limiting device comprises a rotor limiting boss (18) on the low-temperature material rotor (1), and the rotor limiting boss (18) is located between the high-temperature zone and the second low-temperature zone.

6. The compressor rotor set according to claim 5, characterized in that: The rotor limiting device also includes a balancing disk (7), and the balancing disk (7) is installed between the high-temperature material rotor (4) and the rotor limiting boss (18).

7. The compressor rotor set according to claim 6, characterized in that: The balancing disk (7) comprises two semi-circular ring disks, the inner side walls of the semi-circular ring disks are provided with balancing disk lock key grooves (14), and the end surfaces at both ends of the semi-circular ring disks are provided with bolt holes (15).

8. The compressor rotor set according to claim 7, characterized in that: A shaft lock keyway (13) is provided at a location on the cryogenic material rotor (1) where it is mounted in cooperation with the balancing disc (7), and a lock key (8) is installed in the shaft lock keyway (13).

9. The compressor rotor set according to claim 8, characterized in that: A concave stop is provided on one side of the balancing disc (7) close to the high-temperature material rotor (4), and a convex stop is provided on one end of the high-temperature material rotor (4) close to the balancing disc (7).

10. The compressor rotor set according to claim 9, characterized in that: It also includes a spring (6), a spring groove is provided on the axial end surface of the convex stop, and the spring (6) is installed in the spring groove.

11. The compressor rotor set according to claim 10, characterized in that: It also comprises a sealing ring (5), wherein the sealing ring (5) is installed between the convex stopper and the concave stopper.

12. The compressor rotor set according to claim 6, characterized in that: The balancing disk (7) is an annular disk, the inner ring wall of which is provided with an internal thread, and the low-temperature material rotor (1) is provided with an external thread at a location where the balancing disk (7) is mounted in cooperation.

13. The compressor rotor set according to claim 1, characterized in that: The low-temperature material rotor (1) and the high-temperature material rotor (4) are assembled by means of a torque transmission key.

14. The compressor rotor set according to claim 13, characterized in that: The low-temperature material rotor (1) is provided with a plurality of axial torque transmission teeth (11) on the circumferential surface located in the high-temperature zone, and the torque transmission teeth (11) are distributed at equal intervals along the circumferential direction; A plurality of torque transmission tooth grooves (12) are provided on the inner side of the high temperature material rotor (4) along the circumferential direction, and the torque transmission tooth grooves (12) are distributed at equal intervals along the circumferential direction.

15. The compressor rotor set according to claim 1, characterized in that: The axial matching surfaces of the low-temperature material rotor (1) and the high-temperature material rotor (4) are conical surfaces.

16. The compressor rotor set according to claim 1, characterized in that: The low-temperature material rotor (1) is provided with a plurality of annular discs on its circumferential surface located in the first low-temperature zone, and the low-temperature zone moving blades (2) are mounted on the discs at equal intervals along the circumferential direction; the high-temperature material rotor (4) is provided with a plurality of annular discs on its circumferential outer surface, and the high-temperature zone moving blades (3) are mounted on the discs at equal intervals along the circumferential direction.

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