Novel rotor with combined pull rod for compression-expansion machine

Abstract

The utility model provides a novel rotor with a combined pull rod for a compression-expansion machine. The novel rotor comprises a coupling connecting end, a compression side thrust bearing mounting end, a compression side supporting bearing mounting end, a first-section rotor, a plurality of rotor discs, a connecting-section rotor, an expansion side supporting bearing mounting end and an expansion side two-stage rotor disc, the device further comprises a center pull rod, a compression side circumferential pull rod and an expansion side circumferential pull rod. The center pull rod sequentially penetrates through the multiple rotor discs, and the multiple rotor discs are connected through the center pull rod. One end of the central pull rod is detachably connected with the first-section rotor, and the other end is detachably connected with the rotor disc at the tail end of the compression side; the rotor disc at the tail end of the compression side is detachably connected with the connecting section rotor through a compression side circumferential pull rod; and the expansion side supporting bearing mounting end is detachably connected with the expansion side two-stage rotor disc through an expansion side circumferential pull rod. The rotor has the advantages of light weight and simple structure, and can meet the requirements of quick start and stop and frequent start and stop in the field of energy storage.

Description

Technical Field

[0001] The utility model relates to the technical field of energy, in particular to a novel rotor for a compression-expansion machine with a combined pull rod. Background Art

[0002] With the development needs of the energy field, the requirements for the pressure, flow rate, temperature and rotational speed of compressors and expanders are constantly increasing. There are rotors in compressors and expanders. However, conventional large solid rotors have problems such as large weight, difficult to drive, and more material waste, and cannot meet the requirements of rapid and frequent start-stop in the energy storage field. Therefore, there is an urgent need to develop a new type of rotor assembly to achieve economic and efficient purposes. Summary of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a novel rotor for a compression-expansion machine with a combined pull rod, which has the advantages of lighter rotor weight and simple structure, and can meet the requirements of rapid start-stop and frequent start-stop in the energy storage field.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A novel rotor for a compression-expansion machine with a combined pull rod, the novel rotor sequentially includes a coupling connection end, a compression side thrust bearing installation end, a compression side support bearing installation end, a first-stage rotor, a plurality of rotor discs, a connection section rotor, an expansion side support bearing installation end, and an expansion side two-stage rotor disc from the compression side to the expansion side;

[0006] It further includes a central pull rod, the central pull rod sequentially passes through a plurality of rotor discs, and the plurality of rotor discs are connected by the central pull rod; one end of the central pull rod is detachably connected to the first-stage rotor, and the other end of the central pull rod is detachably connected to the rotor disc at the end of the compression side;

[0007] It further includes a compression side circumferential pull rod, and the rotor disc at the end of the compression side and the connection section rotor are detachably connected by the compression side circumferential pull rod;

[0008] It further includes an expansion side circumferential pull rod, and the expansion side support bearing installation end and the expansion side two-stage rotor disc are detachably connected by the expansion side circumferential pull rod.

[0009] Furthermore, the rotor disc includes one or more of a single-stage rotor disc, a two-stage rotor disc, and a three-stage rotor disc; the central pull rod sequentially passes through the rotor discs along the direction of compressed gas flow;

[0010] End teeth are provided on the side of the rotor disc and on the side of the first-stage rotor close to the rotor disc. The adjacent first-stage rotor and multiple rotor discs are connected and torque-transmitted through the meshing of the end teeth.

[0011] Furthermore, a weight-removing groove is provided on the side wall of the rotor disc.

[0012] Furthermore, a central pull rod thread groove is opened in the first-stage rotor. One end of the central pull rod close to the first-stage rotor is provided with fastening threads and is threadedly connected in the central pull rod thread groove.

[0013] Furthermore, a central circular hole is opened in the rotor disc at the end of the compression side. One end of the central pull rod close to the connecting-section rotor is provided with tension adjustment threads and passes through the central circular hole. A nut is threadedly connected to a section of the central pull rod passing through the central circular hole, and the nut abuts against the side wall of the rotor disc at the end of the compression side after rotation.

[0014] Furthermore, a lifting hole is opened in the rotor disc.

[0015] Furthermore, a number of circumferential pull rod thread grooves are opened along the circumferential direction on the side wall of the rotor disc at the end of the compression side. One end of the connecting-section rotor close to the rotor disc is provided with an annular connecting disc; a ring-shaped dovetail groove is further included. The rotor disc, the connecting disc, and the dovetail groove are sequentially fitted. A number of the circumferential pull rods on the compression side sequentially pass through the dovetail groove and the connecting disc and are then threadedly connected in the circumferential pull rod thread grooves in the rotor disc. One end of the circumferential pull rod on the compression side away from the rotor disc is threadedly connected with a nut, and the nut abuts against the dovetail groove after rotation; an even number of the circumferential pull rods on the compression side are provided.

[0016] Furthermore, one end of the installation end of the expansion-side support bearing is provided with a groove. An annular positioning plate is provided at the opening of the groove. The side walls of the two-stage rotor disc on the expansion side are fitted with the annular positioning plate. A number of the circumferential pull rods on the expansion side are sequentially arranged in a ring shape and pass through the positioning plate and the two-stage rotor disc on the expansion side. One end of the circumferential pull rod on the expansion side is provided with a nut, and the nut abuts against the positioning plate. The other end of the circumferential pull rod on the expansion side is threadedly connected with a nut, and the nut abuts against the two-stage rotor disc on the expansion side after rotation; an even number of the circumferential pull rods on the expansion side are provided.

[0017] Furthermore, a number of annular damping protrusions are further provided on the central pull rod, and the damping protrusions are in contact with the circumferential inner wall of the rotor disc.

[0018] The beneficial effects of the present utility model are as follows: In this application, the combined tie rods are the central tie rod and the circumferential tie rod. By using the central tie rod and the circumferential tie rod in combination, the structure of the entire rotor can be made more concise, and at the same time, the problem of low natural frequency of the rotor caused by the slender tie rod can be avoided. And by setting weight removal grooves on the rotor disc, the weight of the rotor can be further reduced to meet the requirements of fast start-stop and frequent start-stop in the energy storage field. Description of the Drawings

[0019] Figure 1 It is a schematic cross-sectional view of an embodiment of the present utility model;

[0020] Figure 2 It is a schematic diagram of a two-stage rotor disc in an embodiment of the present utility model.

[0021] In the above-mentioned drawings: 1, coupling connection end; 2, compression side thrust bearing installation end; 3, thrust disc; 4, compression side support bearing installation end; 5, central tie rod thread groove; 6, first-stage rotor; 7, single-stage rotor disc; 8, blade; 9, weight removal groove; 10, end teeth; 11, two-stage rotor disc; 12, three-stage rotor disc; 13, nut; 14, compression side circumferential tie rod; 15, dovetail groove; 16, connecting section rotor; 17, expansion side support bearing installation end; 18, expansion side two-stage rotor; 19, expansion side circumferential tie rod; 20, central tie rod; 21, tension adjustment thread; 22, vibration damping protrusion; 23, fastening thread; 24, end tooth profile; 25, lifting hole; 26, groove; 27, positioning plate; 28, nut; 29, central round hole. Detailed Embodiments

[0022] The technical solutions in the present utility model will be further described below in conjunction with the drawings and embodiments.

[0023] A novel rotor for a compression-expansion machine with combined tie rods, as Figure 1 shown, the novel rotor sequentially includes a coupling connection end 1, a compression side thrust bearing installation end 2, a compression side support bearing installation end 4, a first-stage rotor 6, a plurality of rotor discs, a connecting section rotor 16, an expansion side support bearing installation end 17, and an expansion side two-stage rotor 18 disc 11 from the compression side to the expansion side.

[0024] Among them, the coupling connection end 1 is used to complete the torque transmission after being mated with the coupling; a thrust disk 3 is provided on the circumferential surface of the compression side thrust bearing installation end 2, and the compression side thrust bearing installation end 2 is used to install the thrust bearing and cooperate with the thrust disk 3 to transmit the axial thrust of the rotor; both the compression side support bearing installation end 4 and the expansion side support bearing installation end 17 are used to install the support bearings to ensure the lubrication and support during the rotation of the entire rotor. In this embodiment, the coupling connection end 1, the compression side thrust bearing installation end 2, the thrust disk 3, the compression side support bearing installation end 4, and the first-stage rotor 6 are integrally formed by turning.

[0025] The new type of rotor includes a central tie rod 20, which sequentially passes through a plurality of rotor disks along the direction of compressed gas flow, and the plurality of rotor disks are connected by the central tie rod 20. A number of annular damping protrusions 22 are provided on the central tie rod 20, and the damping protrusions 22 are in contact with the circumferential inner wall of the rotor disk. The rotor disk can include one or more of a single-stage rotor disk 7, a two-stage rotor disk 11, and a three-stage rotor disk 12. In this embodiment, the plurality of rotor disks include three single-stage rotor disks 7, four two-stage rotor disks 11, and one three-stage rotor disk 12, and the central tie rod 20 sequentially passes through the three single-stage rotor disks 7, the four two-stage rotor disks 11, and one three-stage rotor disk 12. Blades 8 are provided on the rotor disk, and an annular weight removal groove 9 is also provided on the side wall of the rotor disk. By providing the weight removal groove 9, the weight can be greatly reduced while ensuring the strength. A lifting hole 25 is also opened on the rotor disk, and the lifting hole 25 is used for lifting connection during the processing and assembly of the rotor disk.

[0026] As Figure 1-2 shown, end teeth 10 are provided on one side of the first-stage rotor 6 close to the single-stage rotor disk 7, on both sides of the single-stage rotor disk 7, on both sides of the two-stage rotor disk 11, and on the side of the three-stage rotor disk 12 at the compression side end away from the connecting section rotor 16. The end teeth 10 include an end tooth 10 profile, and the end tooth 10 profile is the contact part where adjacent end teeth 10 mesh. The first-stage rotor 6 and the closest single-stage rotor disk 7 are connected and torque is transmitted through the meshing of the end teeth 10, and adjacent rotor disks are also connected and torque is transmitted through the meshing of the end teeth 10.

[0027] One end of the central tie rod 20 is detachably connected to the first-stage rotor 6. As Figure 1 shown, a central tie rod 20 threaded groove 5 is opened in the first-stage rotor 6, and one end of the central tie rod 20 close to the first-stage rotor 6 is provided with a fastening thread 23 and is threadedly connected in the central tie rod 20 threaded groove 5.

[0028] The other end of the central tie rod 20 is detachably connected to the three-stage rotor disk 12 at the compression side end. As Figure 1As shown in the figure, a central circular hole 29 is formed in the three-stage rotor disc 12 at the end of the compression side. One end of the central tie rod 20 close to the connecting section rotor 16 is provided with a tensile adjustment thread 21 and passes through the central circular hole 29. A nut 13 is threadedly connected to a section of the central tie rod 20 passing through the central circular hole 29. After the nut 13 rotates, it abuts against the side wall of the rotor disc at the end of the compression side. At this time, the first-stage rotor 6, the three single-stage rotor discs 7, the four two-stage rotor discs 11, and the one three-stage rotor disc 12 are all abutted against each other, which is more conducive to structural stability and torque transmission.

[0029] It also includes a circumferential tie rod 14 on the compression side. The three-stage rotor disc 12 at the end of the compression side and the connecting section rotor 16 are detachably connected by the circumferential tie rod 14 on the compression side. As Figure 1 shown in the figure, an even number of circumferential tie rod threaded grooves are formed in a circular distribution along the circumferential direction on the side wall of the three-stage rotor disc 12 at the end of the compression side, and the distances between adjacent circumferential tie rod threaded grooves are the same. In this embodiment, there are twelve circumferential tie rod threaded grooves in total. An annular connecting disc is integrally provided at one end of the connecting section rotor 16 close to the three-stage rotor disc 12, and the side surface of the connecting disc is attached to the side surface of the three-stage rotor disc 12. It also includes an annular dovetail groove 15. The bottom surface of the dovetail groove 15 is also set as a plane and is attached to the side surface of the connecting disc. At this time, the rotor disc, the connecting disc, and the dovetail groove 15 are attached in sequence. The circumferential tie rod 14 on the compression side passes through the dovetail groove 15 and the connecting disc in sequence and is then threadedly connected to the circumferential tie rod threaded groove in the rotor disc. A nut 13 is threadedly connected to the end of the circumferential tie rod 14 on the compression side away from the rotor disc, and the nut 13 abuts against the dovetail groove 15 after rotation. In addition, a protective sleeve can be sleeved on the middle section of the circumferential tie rod 14 on the compression side to further protect the circumferential tie rod 14 on the compression side.

[0030] It also includes a circumferential tie rod 19 on the expansion side. The expansion side support bearing installation end 17 and the expansion side two-stage rotor 18 disc 11 are detachably connected by the circumferential tie rod 19 on the expansion side. As Figure 1 shown in the figure, a groove 26 is provided at one end of the expansion side support bearing installation end 17, and an annular positioning plate 27 is integrally provided at the opening of the groove 26. The side wall of the expansion side two-stage rotor 18 disc 11 is attached to the annular positioning plate 27. The circumferential tie rod 19 on the expansion side passes through the positioning plate 27 and the expansion side two-stage rotor 18 disc 11 in a circular distribution in sequence. The circumferential tie rod 19 on the expansion side is set to be an even number and is provided with external threads. In this embodiment, there are twelve circumferential tie rods 19 on the expansion side, and the intervals are the same. A nut 28 is fixedly provided at one end of the circumferential tie rod 19 on the expansion side, and the nut 28 abuts against the positioning plate 27. A nut 13 is threadedly connected to the other end of the circumferential tie rod 19 on the expansion side, and the nut 13 abuts against the expansion side two-stage rotor 18 disc 11 after rotation.

[0031] In this application, the combined tie rod is the central tie rod 20 and the circumferential tie rod. By using the central tie rod 20 and the circumferential tie rod in combination, the structure of the entire rotor can be made more concise, and at the same time, the problem of low natural frequency of the rotor caused by the slender tie rod can be avoided. Moreover, by setting the weight removal groove 9 on the rotor disc, the weight of the rotor can be further reduced to meet the requirements of quick start-stop and frequent start-stop in the energy storage field.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A new type of rotor for a compression expander with a combined pull rod, the new type of rotor comprising a coupling connection end (1), a compression side thrust bearing mounting end (2), a compression side support bearing mounting end (4), and a first section rotor (6), characterized in that: It also includes a plurality of rotor disks, a connecting section rotor (16), an expansion side support bearing mounting end (17) and an expansion side two-stage rotor (18) disk (11); It also includes a central tie rod (20), which passes through a plurality of rotor disks in sequence, and the plurality of rotor disks are connected via the central tie rod (20); one end of the central tie rod (20) is detachably connected to the first section rotor (6), and the other end of the central tie rod (20) is detachably connected to the rotor disk at the end of the compression side; It also includes a compression side circumferential tie rod (14), through which the rotor disk at the compression side end and the connecting section rotor (16) are detachably connected; It also includes an expansion side circumferential tie rod (19), through which the expansion side support bearing mounting end (17) and the expansion side two-stage rotor (18) disk (11) are detachably connected.

2. A novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: The rotor disk comprises one or more of a unipolar rotor disk, a two-stage rotor disk (11) and a three-stage rotor disk (12); the central tie rod (20) passes through the rotor disk in sequence along the flow direction of the compressed gas; End teeth (10) are provided on the side of the rotor disk and on the side of the first rotor section (6) close to the rotor disk, and the adjacent first rotor sections (6) and a plurality of rotor disks are connected and torque is transmitted through meshing of the end teeth (10).

3. A new type of rotor for a compression expander with a combined tie rod according to claim 1 or 2, characterized in that: The side wall of the rotor disk is also provided with a deweighting groove (9).

4. A novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: A central pull rod (20) thread groove (5) is provided in the first section rotor (6), and a fastening thread (23) is provided at one end of the central pull rod (20) close to the first section rotor (6) and is threadedly connected in the central pull rod (20) thread groove (5).

5. A new type of rotor for a compression expander with a combined tie rod according to claim 1 or 4, characterized in that: A central circular hole (29) is provided in the rotor disk at the compression side end, and a tension adjustment thread (21) is provided at one end of the central pull rod (20) close to the connecting section rotor (16) and passes through the central circular hole (29), and a nut (13) is threadedly connected on a section of the central pull rod (20) passing through the central circular hole (29), and the nut (13) abuts against the side wall of the rotor disk at the compression side end after rotation.

6. The novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: A lifting hole (25) is provided on the rotor disk.

7. The novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: A plurality of circumferential tie rod thread grooves are provided on the side wall of the rotor disk at the end of the compression side along its circumference, and an annular connecting disk is provided at one end of the connecting section rotor (16) close to the rotor disk; it also includes an annular dovetail groove (15), and the rotor disk, the connecting disk, and the dovetail groove (15) are arranged in sequence, and a plurality of the compression side circumferential tie rods (14) are sequentially passed through the dovetail groove (15) and the connecting disk and are threadedly connected to the circumferential tie rod thread groove in the rotor disk; a nut (13) is threadedly connected to the end of the compression side circumferential tie rod (14) away from the rotor disk, and the nut (13) is rotated to abut against the dovetail groove (15); an even number of the compression side circumferential tie rods (14) are provided.

8. The novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: A groove (26) is provided at one end of the expansion side support bearing mounting end (17), and an annular positioning plate (27) is provided at the opening of the groove (26). The side wall of the expansion side two-stage rotor (18) disk (11) is fitted with the annular positioning plate (27). A plurality of expansion side circumferential tie rods (19) are distributed along an annular shape and pass through the positioning plate (27) and the expansion side two-stage rotor (18) disk (11) in sequence. A nut (28) is provided at one end of the expansion side circumferential tie rod (19), and the nut (28) abuts against the positioning plate (27). A nut (13) is threadedly connected to the other end of the expansion side circumferential tie rod (19), and the nut (13) abuts against the expansion side two-stage rotor (18) disk (11) after rotation. An even number of the expansion side circumferential tie rods (19) are provided.

9. The novel rotor for a compression expander with a combined tie rod according to claim 1, characterized in that: A plurality of annular vibration-damping protrusions (22) are also provided on the central pull rod (20), and the vibration-damping protrusions (22) are in contact with the circumferential inner wall of the rotor disk.

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