Generator rotor mounting device

Abstract

The utility model provides a generator rotor installation device, comprising a fixing seat, an axial feed assembly, a pressure detection element and a radial adjustment assembly. When installing the rotor, the fixing seat and the outer shell of the generator are fixedly installed, the upper end of the motor rotor and the lower part of the pressure detection element are connected, the axial feed assembly is used to vertically convey the rotor downward, the lifting end descends, and the rotor is driven by a force transmission rod to enter the outer shell from top to bottom, the pressure detection element is used to detect the axial resultant force of gravity and magnetic field force on the rotor, and the radial adjustment assembly is used to adjust the radial position of the force transmission rod, so as to ensure that the coaxiality of the rotor and the stator and the magnetic bearing meets the requirements, solve the problem that the rotor of the existing magnetic suspension generator is easy to deviate during installation, and improve the installation accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of generator assembly, and in particular relates to a generator rotor installation device. Background Art

[0002] The magnetic levitation waste heat generator is mainly composed of a shell, and components such as the stator, rotor and magnetic bearings installed inside the shell. During assembly, the stator and magnetic bearings are first installed inside the generator shell in sequence, and they are interference fit with the shell. Then the rotor needs to be installed in place, and the magnetic force of the magnetic bearings is used to suspend the rotor inside the generator to avoid direct contact between it and the magnetic bearings, reduce friction loss, achieve high-speed loss-free operation, and greatly improve the service life of the machine.

[0003] The rotor is difficult to install because there is a magnetic field force between the rotor, magnetic bearings and stator. The magnets on the magnetic bearings will attract the rotor together, and the permanent magnets on the rotor will also attract the stator. The rotor needs to overcome the above magnetic field force during installation. At the same time, the indicator for the rotor to be finally installed in place is: the combined force of gravity and magnetic field force reaches the force value required by the design, and after the installation is completed, it is necessary to ensure that the coaxiality of the rotor, magnetic bearings, stator and generator housing is within the specified range before it is considered to be installed in place. Due to the existence of magnetic field forces between the rotor, magnetic bearings and stator, the rotor is prone to offset during installation, and it is difficult to ensure the centration of the rotor. Utility Model Content

[0004] The utility model provides a generator rotor installation device, aiming to solve the problem that the existing magnetic suspension generator rotor is easily offset during installation.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a generator rotor installation device, comprising:

[0006] Fixed seat;

[0007] An axial feeding assembly, comprising a lifting unit, a universal joint and a force transmission rod, wherein the lifting unit is arranged on the fixed seat and has a lifting end facing vertically downward, the force transmission rod is arranged at the lower end of the lifting end, and the universal joint is connected to the force transmission rod and the lifting end;

[0008] A pressure detection element is arranged at the lower end of the force transmission rod; and

[0009] The radial adjustment assembly comprises a plurality of telescopic units, which are arranged on the fixing seat at intervals along the circumference of the force transmission rod. The telescopic units have telescopic ends which can be telescoped along the radial direction of the rotor, and the telescopic ends face the force transmission rod.

[0010] In a possible implementation, the fixing seat includes:

[0011] Fixed plate;

[0012] A plurality of support rods are circumferentially arranged above the fixing plate, and the lower ends of the support rods are connected to the fixing plate; and

[0013] A guide sleeve is connected to the upper end of the support rod, and the lifting end is passed through the guide sleeve.

[0014] In a possible implementation, the fixing plate is provided with a plurality of mounting holes along its axial direction, and the mounting holes penetrate through the thickness direction of the fixing plate.

[0015] In a possible implementation, the guide sleeve has a first threaded hole that penetrates vertically, and the lifting unit includes a first screw rod, which is threadably matched with the first threaded hole.

[0016] In a possible implementation, the lifting unit further includes a handwheel connected to an upper end of the first screw rod.

[0017] In a possible implementation, the fixing seat is provided with a plurality of adjustment blocks along the circumferential direction, the adjustment blocks have second threaded holes penetrating along the radial direction of the rotor, the telescopic unit is a second screw rod, and the second screw rod is threadably matched with the second threaded hole.

[0018] In a possible implementation, the lifting unit is an electric lifting rod.

[0019] In a possible implementation, the telescopic unit is an electric telescopic rod.

[0020] In a possible implementation manner, the pressure detection element is a pressure sensor.

[0021] In a possible implementation manner, the pressure detection element is connected to the force transmission rod via a screw.

[0022] Compared with the prior art, the beneficial effects of the generator rotor mounting device provided by the utility model are:

[0023] The generator rotor installation device provided by the utility model comprises a fixing seat, an axial feed assembly, a pressure detection element and a radial adjustment assembly. When installing the rotor, the fixing seat and the outer shell of the generator are fixedly installed, the upper end of the motor rotor and the lower part of the pressure detection element are connected, the axial feed assembly is used to transport the rotor vertically downward, the lifting end descends, and the rotor is driven by the force transmission rod to enter the outer shell from top to bottom, the pressure detection element is used to detect the axial resultant force of gravity and magnetic field force on the rotor, and the radial adjustment assembly is used to adjust the radial position of the force transmission rod, so as to ensure that the coaxiality of the rotor, the stator and the magnetic bearing meets the requirements.

[0024] The utility model can place the rotor into the housing of the generator from top to bottom through the axial feeding component, and fine-tune the radial position of the rotor through the radial adjustment component, so that the rotor and the stator and the magnetic bearing are coaxially aligned, solving the problem that the rotor of the existing magnetic suspension generator is easy to deviate during installation. The radial force exerted on the rotor can be detected in real time through the pressure detection element, so as to judge whether the rotor is installed in place, which can meet the accuracy and position requirements required for the rotor installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a generator rotor mounting device provided in one embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the use of a generator rotor provided in one embodiment of the utility model;

[0027] Figure 3 for Figure 2 A partial enlarged view of part A in the middle.

[0028] Description of reference numerals:

[0029] 1. Generator rotor installation device;

[0030] 10. Fixed seat; 11. Fixed plate; 111. Mounting hole; 12. Support rod; 13. Guide sleeve; 14. Adjustment block;

[0031] 20. Axial feed assembly; 21. Lifting unit; 211. First screw rod; 212. Hand wheel; 22. Universal joint; 23. Force transmission rod;

[0032] 30. Pressure detection element;

[0033] 40. radial adjustment assembly; 41. second screw rod;

[0034] 2. Housing; 3. Magnetic bearing; 4. Stator; 5. Rotor; 6. Top screw; 7. Connecting screws. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0038] Please also read Figures 1 to 3 , the generator rotor 5 installation device 1 provided in the embodiment of the utility model is described below.

[0039] See also Figure 1 The embodiment of the utility model provides a generator rotor 5 installation device 1, including a fixed seat 10, an axial feed assembly 20, a pressure detection element 30 and a radial adjustment assembly 40, the axial feed assembly 20 includes a lifting unit 21, a universal joint 22 and a force transmission rod 23, the lifting unit 21 is arranged on the fixed seat 10, and has a lifting end facing vertically downward, the force transmission rod 23 is arranged at the lower end of the lifting end, and the universal joint 22 is connected to the force transmission rod 23 and the lifting end; the pressure detection element 30 is arranged at the lower end of the force transmission rod 23; the radial adjustment assembly 40 includes a plurality of telescopic units, and the plurality of telescopic units are arranged on the fixed seat 10 at intervals along the circumference of the force transmission rod 23, and the telescopic unit has a telescopic end that can be telescoped along the radial direction of the rotor 5, and the telescopic end faces the force transmission rod 23.

[0040] Compared with the prior art, the generator rotor 5 mounting device 1 provided in the embodiment of the utility model has the following beneficial effects:

[0041] The generator rotor 5 installation device 1 provided in the embodiment of the utility model includes a fixing seat 10, an axial feed assembly 20, a pressure detection element 30 and a radial adjustment assembly 40. When installing the rotor 5, the fixing seat 10 and the outer casing 2 of the generator are installed and fixed, and the upper end of the motor rotor 5 and the lower part of the pressure detection element 30 are connected. The axial feed assembly 20 is used to transport the rotor 5 vertically downward, and the lifting end descends, and the rotor 5 is driven by the force transmission rod 23 to enter the outer casing 2 from top to bottom. The pressure detection element 30 is used to detect the axial resultant force of gravity and magnetic field force on the rotor 5. The radial adjustment assembly 40 is used to adjust the radial position of the force transmission rod 23, so as to ensure that the coaxiality of the rotor 5 and the stator 4 and the magnetic bearing 3 meets the requirements.

[0042] The embodiment of the utility model can place the rotor 5 into the housing 2 of the generator from top to bottom through the axial feed assembly 20, and fine-tune the radial position of the rotor 5 through the radial adjustment assembly 40, so that the rotor 5 is coaxially aligned with the stator 4 and the magnetic bearing 3, thereby solving the problem that the rotor 5 of the existing magnetic levitation generator is easily offset during installation. The pressure detection element 30 can detect the radial resultant force on the rotor 5 in real time, thereby judging whether the rotor 5 is installed in place, and can meet the accuracy and position requirements required for the installation of the rotor 5.

[0043] In the embodiment of the utility model, the base is used to provide a stable support for the various components installed thereon. When in use, the magnetic bearing 3 and the stator 4 are first installed into the housing 2 of the generator by interference fit, and then the housing 2 of the generator is installed as shown in FIG. Figure 2 As shown, it is placed vertically, and the base can be fixed on the ground or on the outer casing 2 of the generator. The rotor 5 is lifted into the inner part of the outer casing 2 by an overhead crane, and one axial end of the rotor 5 is connected to the sensing position of the pressure detection element 30 so that the pressure detection element 30 can detect the axial force. The rotor 5 is slowly placed into the outer casing 2 through the axial feed assembly 20.

[0044] like Figure 2 As shown, the main components of the waste heat generator are: generator housing 2, stator 4, rotor 5, magnetic bearing 3, etc. The generator is installed vertically. The rotor 5 has magnetic steel attached to the outer periphery at two positions along its own axial direction, one corresponding to the magnetic bearing 3 part, and the other corresponding to the stator 4 core part. The assembly process of the generator is to first assemble the stator 4 and the magnetic bearing 3 in the generator housing 2, and then assemble the rotor 5. Since the rotor 5 will be affected by the magnetic field force of the magnetic bearing 3 during the correct assembly process, the rotor 5 needs to overcome the above-mentioned magnetic field force. At the same time, the indicators for the final installation of the rotor 5 are: the combined force of the gravity and the magnetic field force needs to reach the force value required by the design, and after the installation is completed, the coaxiality of the rotor 5 with the magnetic bearing 3, the stator 4 and the generator housing 2 needs to be ensured. The embodiment of the utility model can be combined with the vertical housing 2 structure of the generator to install the rotor 5 axially from top to bottom.

[0045] In the embodiment of the utility model, the axial feeding assembly 20 is used to slowly transport the rotor 5 downward in the vertical direction, so that the rotor 5 enters the housing 2 from top to bottom. The axial feeding assembly 20 includes a lifting unit 21, a universal joint 22 and a force transmission rod 23. The lifting unit 21 can be an electric lifting rod, a hydraulic push rod, a pneumatic lifting rod, etc., which can drive the rotor 5 to descend to a certain height.

[0046] Since the rotor 5 has both axial displacement and radial displacement during installation, a hard connection cannot be used between the lifting end and the force transmission rod 23. Therefore, in this embodiment, a universal joint 22 is installed between the lifting end and the force transmission rod 23 to meet the design requirements. The lifting end and the force transmission rod 23 are connected by the universal joint 22, so that the force transmission rod 23 can be slightly displaced together with the rotor 5. The universal joint 22 can directly select the universal joint 22 products available on the market (such as a cross-axis universal joint 22, a ball cage universal joint 22, etc.). The force transmission rod 23 can be a rigid component such as a steel rod, etc., and the lower end of the force transmission rod 23 is connected to the pressure detection element 30.

[0047] The pressure detection element 30 is used to detect the axial force (the combined force of gravity and magnetic field force) on the rotor 5. The pressure detection element 30 can be a tension / compression stress sensor currently available on the market, and can be a spring type, a capacitor type, a piezoelectric type, etc., and its detection range can meet the use requirements. The pressure detection element 30 is connected to the force transmission rod 23 and the rotor 5, and can be detachably connected by fasteners such as screws.

[0048] The radial adjustment assembly 40 includes a plurality of telescopic units, which may be two, three, four or more, and are arranged at equal intervals along the circumference of the force transmission rod 23, and are used to limit the force transmission rod 23 in all directions, so as to fine-tune the radial position of the rotor 5. The telescopic unit may be a manually adjusted telescopic member, or an electric telescopic rod, a hydraulic push rod, etc.

[0049] See also Figure 1 In some possible embodiments, the fixing seat 10 includes a fixing plate 11, a support rod 12 and a guide sleeve 13. A plurality of support rods 12 are circumferentially arranged above the fixing plate 11, and the lower ends of the support rods 12 are connected to the fixing plate 11; the guide sleeve 13 is connected to the upper ends of the support rods 12, and the lifting ends are passed through the guide sleeve 13.

[0050] In this embodiment, the fixing seat 10 includes a fixing plate 11, a support rod 12 and a guide sleeve 13. The fixing plate 11 can be connected to the housing 2, or fixed at an appropriate height by a bracket or the like. A plurality of support rods 12 are distributed along the circumference, and a guide strip is provided at the upper end of the support rod 12. The guide sleeve 13 is used for guiding when the lifting end moves. The fixing plate 11, the support rod 12 and the guide sleeve 13 can be integrally connected by welding or the like, or can be detachably connected by fasteners such as screws or the like.

[0051] See also Figure 1 , Figure 2 and Figure 3In some possible embodiments, the fixing plate 11 is provided with a plurality of mounting holes 111 along its axial direction. The mounting holes 111 penetrate through the thickness direction of the fixing plate 11. The mounting holes 111 are adapted to the generator housing 2. Connecting screws 7 are provided in the mounting holes 111. The fixing plate 11 and the housing 2 are connected as a whole through the connecting screws 7.

[0052] See also Figure 1 and Figure 2 In some possible embodiments, the guide sleeve 13 has a first threaded hole that passes through in the vertical direction, and the lifting unit 21 includes a first screw rod 211, and the first screw rod 211 is threadedly engaged with the first threaded hole. In some possible embodiments, the lifting unit 21 also includes a hand wheel 212, and the hand wheel 212 is connected to the upper end of the first screw rod 211.

[0053] In this embodiment, the rotor 5 is subjected to a large axial force based on the analysis of its own gravity and the magnetic field force on the rotor 5. Therefore, a screw nut structure capable of transmitting a large torque is adopted, and one end of the first screw is connected to a large-diameter hand wheel 212 by a key. The hand wheel 212 is manually rotated to transmit the torque to the screw, driving the first screw 211 to rotate. The first screw passes through the first threaded hole of the guide sleeve 13, and the rotation of the first screw 211 can drive the rotor 5 to move axially inside the generator.

[0054] See also Figure 1 In some possible embodiments, the fixing seat 10 is provided with a plurality of adjustment blocks 14 along the circumferential direction, the adjustment block 14 has a second threaded hole passing through the radial direction of the rotor 5, the telescopic unit is a second screw rod 41, and the second screw rod 41 is threadedly matched with the second threaded hole.

[0055] The rotor 5 passes through the magnetic bearing 3 (also called passive magnetic bearing 3) and the stator 4 from the top of the generator casing 2. After the rotor 5 is installed in place, it must meet the coaxiality requirements with the magnetic bearing 3, the stator 4 and the generator casing 2, so the rotor 5 needs to be radially adjusted.

[0056] In this embodiment, a plurality of adjustment blocks 14 are installed on the fixing seat 10. The adjustment blocks 14 have second threaded holes radially extending through the rotor 5. A second screw rod 41 is threadedly fitted in each second threaded hole. The second screw rod abuts against the rotor 5 at different positions. The radial movement of the rotor 5 can be adjusted by rotating the second screw rod 41.

[0057] In a specific embodiment, four adjusting blocks 14 and four second screw rods 41 are respectively provided.

[0058] In order to realize the detachable connection between the pressure detection element 30 and the force transmission rod 23, please refer to Figure 2 and Figure 3 In some possible embodiments, the pressure detection element 30 is connected to the force transmission rod 23 by screws.

[0059] like Figure 2 As shown, in order to further improve the radial adjustment accuracy of the rotor 5, a third threaded hole can be opened at the lower end of the motor housing 2, and multiple third threaded holes are distributed along the circumferential direction. The inner thread of the third threaded hole is equipped with a top screw 6. The radial position of the lower end of the rotor 5 can be adjusted by rotating the top screw 6.

[0060] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A generator rotor mounting device, characterized in that: include: Fixed seat; An axial feeding assembly, comprising a lifting unit, a universal joint and a force transmission rod, wherein the lifting unit is arranged on the fixed seat and has a lifting end facing vertically downward, the force transmission rod is arranged at the lower end of the lifting end, and the universal joint is connected to the force transmission rod and the lifting end; A pressure detection element is arranged at the lower end of the force transmission rod; and The radial adjustment assembly comprises a plurality of telescopic units, which are arranged on the fixing seat at intervals along the circumference of the force transmission rod. The telescopic units have telescopic ends which can be telescoped along the radial direction of the rotor, and the telescopic ends face the force transmission rod.

2. The generator rotor mounting device according to claim 1, characterized in that: The fixing seat comprises: Fixed plate; A plurality of support rods are circumferentially arranged above the fixing plate, and the lower ends of the support rods are connected to the fixing plate; and A guide sleeve is connected to the upper end of the support rod, and the lifting end is passed through the guide sleeve.

3. The generator rotor mounting device according to claim 2, characterized in that: The fixing plate is provided with a plurality of mounting holes along its axial direction, and the mounting holes penetrate through the thickness direction of the fixing plate.

4. The generator rotor mounting device according to claim 2, characterized in that: The guide sleeve has a first threaded hole that penetrates vertically, and the lifting unit includes a first screw rod, which is threadably matched with the first threaded hole.

5. The generator rotor mounting device according to claim 4, characterized in that: The lifting unit further comprises a hand wheel, and the hand wheel is connected to the upper end of the first screw rod.

6. The generator rotor mounting device according to claim 1, characterized in that: The fixing seat is provided with a plurality of adjustment blocks along the circumferential direction, and the adjustment blocks have second threaded holes penetrating along the radial direction of the rotor. The telescopic unit is a second screw rod, and the second screw rod is threadedly matched with the second threaded hole.

7. The generator rotor mounting device according to claim 1, characterized in that: The lifting unit is an electric lifting rod.

8. The generator rotor mounting device according to claim 1, characterized in that: The telescopic unit is an electric telescopic rod.

9. The generator rotor mounting device according to claim 1, characterized in that: The pressure detection element is a pressure sensor.

10. The generator rotor mounting device according to claim 1, characterized in that: The pressure detection element is connected to the force transmission rod via screws.

Images