Nitrogen pressure differential turbine expander generator installation testing device

Abstract

The application relates to the technical field of turbine expansion generators, in particular to a nitrogen pressure difference turbine expansion generator installation testing device, which comprises a positioning and clamping mechanism of a motor stator and a hoisting mechanism of a motor rotor, an upper end cover is fixedly installed at the upper end of the motor rotor, the upper end of the rotating shaft of the motor rotor extends out of the upper end cover, and the hoisting mechanism clamps the upper end of the rotating shaft of the motor rotor; the positioning and clamping mechanism is arranged on the support of a base; a jacking mechanism is further arranged below the positioning and clamping mechanism; the jacking mechanism comprises a lifting ring and a jacking column located in the middle of the lifting ring; the jacking column supports the lower end of the rotating shaft of the motor rotor, and the assembly precision of the stator and the rotor is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of turbine expander generator technology, specifically to a nitrogen pressure differential turbine expander generator installation and testing device. Background Technology

[0002] The nitrogen differential pressure turbine expander generator is a high-efficiency energy conversion device that uses the expansion of high-pressure nitrogen to generate electricity. Its core principle is to convert the pressure energy and thermal energy of high-pressure nitrogen into mechanical energy through a turbine expander, which then drives the generator to output electrical energy. When the system is working, high-pressure nitrogen (usually with a pressure of 2-10 MPa) is accelerated through the nozzle and impacts the turbine blades, driving the rotor to rotate at high speed. During this process, the nitrogen pressure and temperature are significantly reduced, and the released energy is transferred to the generator through the rotor.

[0003] Turbine expander generators typically employ a single-stage or multi-stage centripetal structure. The blades require special reinforcement to withstand the tiny particles that may be trapped in the nitrogen gas. The use of magnetic levitation bearings or dry gas seal technology reduces frictional losses, allowing speeds to reach tens of thousands of revolutions per minute. Therefore, the coaxiality of the stator and rotor of the generator is critical. During the assembly of the stator and rotor of a nitrogen differential pressure turbine expander generator, excessive assembly clearance increases gas leakage losses, reduces expansion efficiency, and may also trigger airflow excitation, causing rotor instability or abnormal vibration. Conversely, insufficient clearance may lead to friction or even bearing seizure due to thermal expansion or dynamic deformation. Radial and axial concentricity deviations disrupt dynamic balance, accelerate bearing wear, generate high-frequency noise, and shorten the lifespan of mechanical seals and bearings over long-term operation. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution:

[0005] A nitrogen differential pressure turbine expander generator installation and testing device includes a positioning and clamping mechanism for fixing the motor stator and a hoisting mechanism for moving the motor rotor. An upper end cover is fixedly installed on the upper end of the motor rotor, and the upper end of the motor rotor's shaft extends out of the upper end cover. The hoisting mechanism clamps the upper end of the motor rotor's shaft. The positioning and clamping mechanism is mounted on a support of a base. A lifting mechanism is also provided below the positioning and clamping mechanism. The lifting mechanism includes a lifting ring and a lifting column located in the middle of the lifting ring. The lifting column supports the lower end of the motor rotor's shaft, and the lifting column, together with the hoisting mechanism, moves the motor rotor to the installation position. A slide is also provided on the base, and the slide moves the motor stator into the positioning and clamping mechanism.

[0006] Furthermore, a through hole is provided in the middle of the base plate of the base; two brackets are provided on the two sides of the through hole; each of the two brackets is provided with a symmetrical positioning and clamping mechanism; the positioning and clamping mechanism can clamp and fix the motor stator at the center of the through hole.

[0007] Furthermore, a guide rail is provided on the base plate of the base; the slide is disposed on the guide rail; in the initial position, the motor stator is placed on the slide, and the motor stator is moved to the center position of the positioning and clamping mechanism by the slide; after the positioning and clamping mechanism clamps and fixes the motor stator, the slide moves back to the initial position.

[0008] Furthermore, the positioning and clamping mechanism has two sets and is symmetrically arranged on both sides of the through hole of the base; the positioning and clamping mechanism includes a support plate, which is disposed on the bracket of the base; the support plate is provided with an active clamping block and a passive clamping block; the support plate is equipped with a drive mechanism for driving the active clamping block to move.

[0009] Furthermore, the support plate includes a first support plate and a second support plate; the first support plate and the second support plate are set at a certain angle; the perpendicular line of the first support plate and the perpendicular line of the second support plate intersect at the center of the through hole of the base.

[0010] Furthermore, the first support plate is provided with a movable active clamping block; the second support plate is provided with a movable passive clamping block; the active clamping block and the passive clamping block are connected by a linkage rod; the driving mechanism drives the active clamping block to move, and the active clamping block drives the passive clamping block to move synchronously through the linkage rod.

[0011] Furthermore, the active clamping block and the passive clamping block have the same structure, both including a main body and a guide portion disposed on the main body; an abutment block is disposed on the end face of the main body facing the motor stator; a guide hole is disposed on one side of the main body; the guide hole of the active clamping block and the guide hole of the passive clamping block are disposed facing each other; one end of the linkage rod is fixed to the guide hole of the active clamping block, and the other end of the linkage rod is slidably disposed in the guide hole of the passive clamping block.

[0012] Furthermore, the lifting mechanism is disposed in the through hole of the base; a lower end cover is placed on the lifting ring of the lifting mechanism; the lifting column of the lifting mechanism can extend upward into the interior of the motor stator and abut against the motor rotor above.

[0013] Furthermore, the lifting ring includes an annular lifting ring, the lower end of which is connected to the base frame via multiple guide columns; a hydraulic cylinder is provided on the base frame, which drives the lifting ring to rise and fall; the lower end cover is lifted to the installation position via the lifting ring.

[0014] Furthermore, the lifting column includes a positioning seat and a lifting column; the positioning seat is located at the movable end of the lifting column; the positioning seat is located at the center of the annular plate, and after the positioning seat extends upward into the motor stator and abuts against the lower end of the motor rotor, the motor rotor is positioned. Beneficial effects

[0015] Compared with the prior art, the present invention uses two sets of positioning and clamping mechanisms to clamp, fix and position the motor stator. The lower end cover is lifted and assembled by the lifting mechanism below the motor stator. At the same time, the lifting column of the lifting mechanism extends into the motor stator. The lifting column supports the motor rotor lifted by the hoisting mechanism above. The motor rotor is moved to the assembly position inside the motor stator by the lifting column and the hoisting mechanism descending together. This ensures the coaxial assembly of the motor stator and rotor, improves the dynamic balance of the motor, reduces the vibration of the motor and thus improves the operating efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the nitrogen differential pressure turbine expander generator installation and testing device of the present invention.

[0017] Figure 2 This is a front view of the installation and testing device of the present invention;

[0018] Figure 3 This is a top view of the installation and testing device of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the lifting column of the present invention after it supports the motor rotor;

[0020] Figure 5 This is a schematic diagram showing the motor rotor installed in place according to the present invention;

[0021] Figure 6 This is a schematic diagram of the positioning and clamping mechanism of the present invention;

[0022] Figure 7(A) is a schematic diagram of the positioning and clamping mechanism of the present invention in the retracted state of the clamping block, and Figure 7(B) is a schematic diagram of the positioning and clamping mechanism in the extended state of the clamping block.

[0023] Figure 8 This is a schematic diagram of the positioning and clamping mechanism clamping block of the present invention;

[0024] Figure 9 This is a schematic diagram of the lifting mechanism of the present invention;

[0025] Figure 10 This is a detailed structural diagram of the lifting mechanism of the present invention;

[0026] In the picture:

[0027] Base 1, base plate 11, bracket 12, guide rail 13, through hole 14;

[0028] Positioning and clamping mechanism 2, support plate 21, first support plate 211, second support plate 212, driving mechanism 22, active clamping block 23, passive clamping block 24, linkage rod 25, main body 201, guide part 202, abutment block 203, guide hole 204;

[0029] 3. Lifting mechanism; 4. Motor stator; 5. Motor rotor;

[0030] Upper cap 6; Lower cap 60;

[0031] Slide 7;

[0032] Lifting mechanism 8, lifting column 81, lifting ring 82, annular plate 821, guide column 822, hydraulic cylinder 823, positioning seat 811, lifting column 812, base frame 80; Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The following is based on the appendix Figure 1-10 The present invention provides a detailed description of a nitrogen differential pressure turbine expander generator installation and testing device, comprising a positioning and clamping mechanism 2 for fixing a motor stator 4 and a hoisting mechanism 3 for moving a motor rotor 5. An upper end cover 6 is fixedly installed on the upper end of the motor rotor 5, with the upper end of the rotor shaft extending beyond the upper end cover 6. The hoisting mechanism 3 clamps the upper end of the rotor shaft of the motor rotor 5. The positioning and clamping mechanism 2 is mounted on a bracket 12 of a base 1. A lifting mechanism 8 is also provided below the positioning and clamping mechanism 2. The lifting mechanism 8 includes a lifting ring 82 and a lifting column 81 located in the middle of the lifting ring 82. The lifting column 81 supports the lower end of the rotor shaft of the motor rotor 5, and the lifting column 81, together with the hoisting mechanism 3, moves the motor rotor to the installation position. A slide 7 is also provided on the base 1, and the slide 7 moves the motor stator 4 into the positioning and clamping mechanism 2.

[0035] The motor rotor 5 is vertically moved into the motor stator 4 by the hoisting mechanism 3, which facilitates the assembly operation of the motor rotor 5 and the motor stator 4. When assembling the motor stator 4, the present invention first moves the motor rotor 5 above the motor stator 4 by the hoisting mechanism 3, controls the lifting column 81 of the lifting mechanism 8 to rise and engage with the lower end of the rotating shaft of the motor rotor 5, and controls the hoisting mechanism 3 and the lifting column 81 together to lower the motor rotor 5 to the assembly position with the motor stator 4. This can ensure the assembly accuracy of the motor stator 4 and the motor rotor 5, avoid uneven bearing force on the rotating shaft of the motor rotor 4 when assembling and fixing the upper end cover 6 and the lower end cover 60, improve the dynamic balance performance of the nitrogen pressure differential turbine expansion generator and reduce vibration during operation.

[0036] The base plate 11 of the base 1 has a through hole 14 in the middle; two brackets 12 are arranged on both sides of the through hole 14; the two brackets 12 are respectively provided with a symmetrical positioning and clamping mechanism 2; the positioning and clamping mechanism 2 can clamp and fix the motor stator 4 at the center of the through hole 14.

[0037] See appendix Figure 3 Two brackets 12 are symmetrically arranged on both sides of the through hole 14. The motor stator 4 can enter through the opening on one side of the two brackets 12 via the slide table 7, and then be clamped and positioned by the positioning clamping mechanism 2. The positioning clamping mechanism 2 is a centering clamping mechanism, which can clamp and fix the motor stator 4 at the center position of the through hole 14, thus completing the positioning of the motor stator 4 during assembly.

[0038] The base plate 11 of the base 1 is also provided with a guide rail 13; the slide 7 is provided on the guide rail 13; in the initial position, the motor stator 4 is placed on the slide 7, and the motor stator 4 is moved to the center position of the positioning and clamping mechanism 2 by the slide 7; after the positioning and clamping mechanism 2 clamps and fixes the motor stator 4, the slide 7 moves to the initial position.

[0039] The motor stator 4 is moved by the slide table 7, which is convenient, time-saving, and labor-saving. In this embodiment of the invention, the slide table 7 is provided with a ball bearing structure, which supports the motor stator 4. When the positioning and clamping mechanism 2 clamps and fixes the motor stator 4, the motor stator 4 can move a certain distance relative to the slide table 7 under the positioning action of the positioning and clamping mechanism 2, which facilitates the positioning and fixing of the motor stator 4. After the positioning and clamping mechanism 2 completes the clamping and fixing of the motor stator 4, the slide table 7 moves out from under the motor stator 4 and returns to its initial position. The lifting mechanism 8 under the motor stator 4 can lift the lower end cover 60, and at the same time, the lifting column 81 can rise and extend into the interior of the motor stator 4, so that the lifting column 81 can support the lower end of the rotating shaft of the motor rotor 5 above.

[0040] The positioning and clamping mechanism 2 has two sets and is symmetrically arranged on both sides of the through hole 14 of the base 1; the positioning and clamping mechanism 2 includes a support plate 21, which is disposed on the bracket 12 of the base 1; the support plate 21 is provided with an active clamping block 23 and a passive clamping block 24; the support plate 21 is equipped with a drive mechanism 22 for driving the active clamping block 23 to move.

[0041] The support plate 21 includes a first support plate 211 and a second support plate 212; the first support plate 211 is set at a certain angle to the second support plate 212; the perpendicular line of the first support plate 211 and the perpendicular line of the second support plate 212 intersect at the center of the through hole 14 of the base 1.

[0042] Specifically, the positioning and clamping mechanism 2 of the present invention realizes the centering and clamping of the motor stator 4. The active clamping block 23 slides in a direction perpendicular to the first support plate 211, and the passive clamping block 24 slides in a direction perpendicular to the second support plate 212. The perpendicular line of the first support plate 211 and the perpendicular line of the second support plate 212 intersect at the center of the through hole 14 of the base 1. When the active clamping block 23 and the passive clamping block 24 clamp the motor stator 4, the motor stator 4 can be fixed at the center position of the through hole 14.

[0043] The first support plate 211 is provided with a movable active clamping block 23; the second support plate 212 is provided with a movable passive clamping block 24; the active clamping block 23 and the passive clamping block 24 are connected by a linkage rod 25; the driving mechanism 22 drives the active clamping block 23 to move, and the active clamping block 23 drives the passive clamping block 24 to move synchronously through the linkage rod 25.

[0044] The active clamping block 23 and the passive clamping block 24 have the same structure, both including a main body 201 and a guide part 202 disposed on the main body 201; an abutment block 203 is disposed on the end face of the main body 201 facing the motor stator 4; a guide hole 204 is disposed on one side of the main body 201; the guide hole 204 of the active clamping block 23 and the guide hole 204 of the passive clamping block 24 are disposed facing each other; one end of the linkage rod 25 is fixed to the guide hole 204 of the active clamping block 23, and the other end of the linkage rod 25 is slidably disposed in the guide hole 204 of the passive clamping block 24.

[0045] Specifically, two sets of positioning and clamping mechanisms 2 are symmetrically arranged on both sides of the through hole 14 of the base 1. The support plate 21 of the positioning and clamping mechanism 2 on one side is symmetrically arranged with the support plate 21 of the positioning and clamping mechanism 2 on the other side. The active clamping block 23 and the passive clamping block 24 installed on the support plate 21 are both moving towards the center of the through hole 14. This allows the motor stator 4 to be clamped and positioned at the center of the through hole 14 when the active clamping block 23 and the passive clamping block 24 are used to position and clamp the motor stator 4, thus completing the positioning of the motor stator 4 during assembly.

[0046] The lifting mechanism 8 is disposed in the through hole 14 of the base 1; the lower end cover 60 is placed on the lifting ring 82 of the lifting mechanism 8; the lifting column 81 of the lifting mechanism 8 can extend upward into the interior of the motor stator 4 and abut against the motor rotor 5 above.

[0047] The lifting ring 82 includes an annular lifting ring 82, and the lower end of the lifting ring 82 is connected to the base frame 80 through multiple guide posts 822; a hydraulic cylinder 823 is provided on the base frame 80, and the hydraulic cylinder 823 drives the lifting ring 82 to rise and fall; the lower end cover 60 is lifted to the installation position by the lifting ring 82.

[0048] The lifting column 81 includes a positioning seat 811 and a lifting column 812; the positioning seat 811 is located at the movable end of the lifting column 812; the positioning seat 811 is located at the center of the annular plate 821, and the positioning seat 811 extends upward into the motor stator 4 and abuts against the lower end of the motor rotor 5 to achieve positioning of the motor rotor 5.

[0049] Specifically, when assembling the motor stator 4 and motor rotor 5, the motor stator 4 is first moved between the two sets of positioning and clamping mechanisms 2 via the slide table 7. The drive mechanism 22 is controlled to drive the active clamping block 23 and the passive clamping block 24 to fix the motor stator 4 at the center of the through hole 14. Then, the slide table 7 is moved to the initial position, and the hydraulic cylinder 823 is activated to lift the lower end cover 60 on the lifting ring 82 to the assembly position with the motor stator 4. The lifting column 812 is activated to extend the positioning seat 811 into the motor stator 4. The motor rotor 5 is moved to the center position above the motor stator 4 via the hoisting mechanism 3. The motor stator 4 is controlled to descend and engage with the positioning seat 811 of the lifting column 81 to complete the positioning of the lower end of the motor stator 4 shaft.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen pressure differential turbine expander generator installation test device, comprising a positioning and clamping mechanism (2) for fixing a motor stator (4) and a hoisting mechanism (3) for moving a motor rotor (5), characterized in that: an upper end cover (6) is fixedly installed at an upper end of the motor rotor (5), an upper end of a rotating shaft of the motor rotor (5) protrudes out of the upper end cover (6), and the hoisting mechanism (3) clamps the upper end of the rotating shaft of the motor rotor (5); the positioning and clamping mechanism (2) is arranged on a support (12) of a base (1); a jacking mechanism (8) is further arranged below the positioning and clamping mechanism (2); the jacking mechanism (8) comprises a lifting ring (82) and a jacking column (81) located at a middle part of the lifting ring (82); the jacking column (81) supports a lower end of the rotating shaft of the motor rotor (5), and the jacking column (81) moves the motor rotor together with the hoisting mechanism (3) to an installation position; a sliding table (7) is further arranged on the base (1), and the sliding table (7) moves the motor stator (4) to the positioning and clamping mechanism (2); the positioning and clamping mechanism (2) is arranged symmetrically in two groups on both sides of the through hole (14) of the base (1); the positioning and clamping mechanism (2) comprises a support plate (21) arranged on the support (12) of the base (1); the support plate (21) is provided with a driving clamping block (23) and a driven clamping block (24); a driving mechanism (22) for driving the driving clamping block (23) to act is installed on the support plate (21); the support plate (21) comprises a first support plate (211) and a second support plate (212); the first support plate (211) and the second support plate (212) are arranged at a certain angle; a perpendicular line of the first support plate (211) intersects with a perpendicular line of the second support plate (212) at a center of the through hole (14) of the base (1); the first support plate (211) is provided with the movable driving clamping block (23); the second support plate (212) is provided with the movable driven clamping block (24); the driving clamping block (23) and the driven clamping block (24) are connected through a linkage rod (25); the driving mechanism (22) drives the driving clamping block (23) to move, and the driving clamping block (23) drives the driven clamping block (24) to move synchronously through the linkage rod (25); the jacking mechanism (8) is arranged in the through hole (14) of the base (1); a lower end cover (60) is placed on the lifting ring (82) of the jacking mechanism (8); the jacking column (81) of the jacking mechanism (8) can protrude into the interior of the motor stator (4) upward and abut against the motor rotor (5) above.

2. The installation test device according to claim 1, characterized in that: a through hole (14) is arranged at a middle part of a bottom plate (11) of the base (1); two supports (12) are arranged at positions close to both sides of the through hole (14); two positioning and clamping mechanisms (2) are respectively arranged on the two supports (12) and are symmetric in structure. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The positioning and clamping mechanism (2) can clamp and fix the motor stator (4) at the center position of the through hole (14).

3. The installation and testing device according to claim 2, characterized in that: The bottom plate (11) of the base (1) is further provided with guide rails (13); The sliding table (7) is arranged on the guide rails (13); The motor stator (4) is placed on the sliding table (7) in the initial position, and the motor stator (4) is moved to the center position of the positioning and clamping mechanism (2) through the sliding table (7); After the positioning and clamping mechanism (2) clamps and fixes the motor stator (4), the sliding table (7) moves to the initial position.

4. The installation and testing device according to claim 3, characterized in that: The active clamping block (23) and the passive clamping block (24) are the same structure, both including a main body part (201) and a guide part (202) arranged on the main body part (201); The main body part (201) is provided with an abutting block (203) on the end face facing the motor stator (4); One side of the main body part (201) is provided with a guide hole (204); The guide hole (204) of the active clamping block (23) is oppositely arranged with the guide hole (204) of the passive clamping block (24); One end of the linkage rod (25) is fixed with the guide hole (204) of the active clamping block (23), and the other end of the linkage rod (25) is slidably arranged in the guide hole (204) of the passive clamping block (24).

5. The installation and testing device according to claim 4, characterized in that: The lifting ring (82) includes a ring-shaped lifting ring (82), and the lower end of the lifting ring (82) is connected with the bottom frame (80) through a plurality of guide columns (822); The bottom frame (80) is provided with a hydraulic cylinder (823), and the hydraulic cylinder (823) drives the lifting ring (82) to lift; The lower end cover (60) is jacked up to the installation position through the lifting ring (82).

6. The installation and testing device according to claim 5, characterized in that: The jacking column (81) includes a positioning seat (811) and a lifting column (812); The positioning seat (811) is located at the movable end of the lifting column (812); The positioning seat (811) is located at the center position of the annular plate (821), and after the positioning seat (811) extends upward into the motor stator (4) and abuts against the lower end of the motor rotor (5), the positioning of the motor rotor (5) is realized.

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