Annular bridge crane motor structure for nuclear power station

Abstract

The utility model relates to an annular bridge crane motor structure for a nuclear power station. The annular bridge crane motor structure comprises a motor rotor, an end cover, a connecting bolt, a power junction box, a control junction box, a centrifugal fan and a motor base, a mounting platform is arranged at the top of the motor base; the side surface of the motor base is provided with a base independent pile; the power junction box is mounted on the mounting platform; the control junction box is installed on the independent pile of the machine base. The end cover is mounted at a corresponding position of the motor base through a connecting bolt; the centrifugal fan is installed at the tail end of the motor base. According to the utility model, the structural strength of the motor is enhanced; electromagnetic interference between strong current and weak current is avoided; the heat dissipation capability of the motor is improved; disassembly and maintenance of the motor are simplified; the motor is localized, and national energy safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear energy, in particular to a motor structure of a circular bridge crane used in a nuclear power station. Background Art

[0002] Faced with the threat posed by rapidly growing carbon emissions, countries around the world are implementing legislation, pledges, and other measures to reduce emissions. my country has also set a target date for achieving carbon neutrality. Compared to traditional thermal power generation, the development of nuclear power is a key strategy for my country's energy construction and nuclear industry development. Nuclear island cranes are crucial equipment in nuclear power plant construction, used for lifting, transporting, and installation operations within the nuclear island area. Currently, the motors for these cranes in domestic nuclear power plants are primarily imported.

[0003] The defects of the prior art are:

[0004] 1. The imported motors currently used run in the low frequency range for a long time. Due to the low speed, the motor output torque is very unstable and the pulsation impact is relatively large.

[0005] 2. Due to the high difficulty in manufacturing motors, which in turn affects the energy security of the domestic nuclear power industry, domestically produced nuclear island ring crane lifting motors are needed. Summary of the Invention

[0006] In response to the above-mentioned problems, the utility model provides a motor structure for a circular bridge crane for a nuclear power plant, the purpose of which is to strengthen the structural strength of the motor; avoid electromagnetic interference between strong current and weak current; improve the heat dissipation capacity of the motor; simplify the disassembly and maintenance of the motor; and localize the motor to ensure national energy security.

[0007] In order to solve the above problems, the technical solution provided by the present invention is:

[0008] The motor structure of a circular bridge crane for a nuclear power plant includes a motor rotor, end cover, connecting bolts, power junction box, control junction box, centrifugal fan, and motor base, including:

[0009] The top of the motor base is provided with a mounting platform; the side of the motor base is provided with a base independent pile;

[0010] The power junction box is installed on the mounting platform;

[0011] The control junction box is installed on the independent pile of the machine base;

[0012] The end cover is mounted on the corresponding position of the motor base through the connecting bolts;

[0013] The centrifugal fan is installed at the end of the motor base.

[0014] Preferably, the rotating shaft of the motor rotor is made of high-strength forged steel.

[0015] Preferably, four end cover triangular ribs are provided on the surface of the end cover in the clockwise directions of 1:30, 4:30, 7:30 and 10:30; and the end cover triangular ribs are a triple triangular rib structure.

[0016] Preferably, the outer ring of the end cover is provided with a plurality of oil inlet nozzles;

[0017] Preferably, a base mounting pile is provided on the connection surface between the motor base and the end cover; and a 45° separate heat sink is provided on the outer side of the motor base;

[0018] The base mounting pile is a thickened structure; the base mounting pile is fixedly connected to the 45° independent heat sink.

[0019] Preferably, an end cover mounting pile is provided on the connection surface between the end cover and the motor base; the position of the end cover mounting pile corresponds to the position of the motor base mounting pile;

[0020] The end cover mounting pile is a wide slab structure, and the machine base mounting pile is a narrow slab structure; the end cover mounting pile and the machine base mounting pile are dislocated after being assembled.

[0021] Preferably, the centrifugal fan is a box-type frame structure; the front of the centrifugal fan is provided with centrifugal fan frame support ribs; the centrifugal fan frame support ribs are a closed structure.

[0022] Preferably, a centrifugal fan air inlet is provided on the back of the centrifugal fan; the air inlet area of ​​the centrifugal fan air inlet is 72000mm 2 .

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. Due to the high strength of the material of the motor shaft of the utility model, the motor has a high fatigue limit and the ability to resist multiple impacts. Even if the low-frequency output of the motor is unstable, it will not deform or break the shaft, thereby affecting the safe and stable operation of the motor.

[0025] 2. Since the end cover of the utility model adopts a triple triangular rib structure in four directions, the stability of the end cover is enhanced, so that it can well support the weight of the rotor, while achieving the purpose of shock absorption and transmitting the impact borne by the bearing.

[0026] 3. Since the end cover of the utility model has added oil inlets in multiple positions, it can well meet the needs of online adding bearing grease to the motor in a narrow space, avoiding the burning of the bearing due to drying of the grease.

[0027] 4. Since the utility model separates the control wiring from the power junction box, it prevents electromagnetic interference between strong current and weak current, which may cause erroneous control judgment.

[0028] 5. Since the base mounting piles of the present invention adopt a step-by-step thickening design, the tail of the connecting bolt is prevented from leaking out and being affected by environmental radiation, causing the motor structure to loosen.

[0029] 6. Since the centrifugal fan of the present invention adopts a box-type frame design, while meeting the requirements on structural strength, the air inlet area is further increased, the heat dissipation capacity of the motor is improved, and the motor is kept running at a low temperature.

[0030] 7. Due to the staggered design of the base and the end cover mounting bracket of the utility model, the motor can be easily disassembled and maintained.

[0031] 8. The utility model realizes the localization of the nuclear island ring crane hoisting motor, thereby improving national energy security. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic front view of a motor structure of a circular bridge crane for a nuclear power plant according to a specific embodiment of the utility model;

[0033] Figure 2 This is a schematic perspective view of a motor structure of a circular bridge crane for a nuclear power plant according to a specific embodiment of the present invention;

[0034] Figure 3 A schematic perspective view of a motor base according to a specific embodiment of the present invention;

[0035] Figure 4 It is a schematic front view of an end cover of a specific embodiment of the utility model;

[0036] Figure 5 This is a front structural schematic diagram of a centrifugal fan according to a specific embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the back structure of a centrifugal fan according to a specific embodiment of the present invention.

[0038] Including: 1. Motor rotor, 2. End cover, 3. Connecting bolts, 4. Power junction box, 5. Control junction box, 6. Centrifugal fan, 7. Oil inlet, 8. Machine base mounting pile, 9. Machine base independent pile, 10. End cover mounting pile, 11. End cover triangular rib, 12. Centrifugal fan frame support rib, 13. Centrifugal fan air inlet, 14. Motor base, 15. Mounting platform, 16. 45° individual heat sink DETAILED DESCRIPTION

[0039] The present invention is further illustrated below with reference to specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0040] like Figure 1 、 Figure 3 As shown, the motor structure of the circular bridge crane for nuclear power plants includes a motor rotor 1, an end cover 2, connecting bolts 3, a power junction box 4, a control junction box 5, a centrifugal fan 6, and a motor base 14, wherein:

[0041] A mounting platform 15 is provided on the top of the motor base 14 ; and independent base piles 9 are provided on the sides of the motor base 14 .

[0042] The power junction box 4 is installed on the installation platform 15 .

[0043] The control junction box 5 is installed on the independent pile 9 of the machine base.

[0044] The end cover 2 is mounted at a corresponding position on the motor base 14 via connecting bolts 3 .

[0045] The centrifugal fan 6 is mounted at the end of the motor base 14 .

[0046] It should be noted that the rotating shaft of the motor rotor 1 is made of high-strength forged steel.

[0047] In this specific embodiment, the shaft material of the motor rotor 1 is 42CrMoA ultra-high-strength forged steel and is quenched and tempered, with a yield strength of ≥560MPa and a tensile strength of ≥800MPa; this ensures that the shaft has a high fatigue limit and resistance to multiple impacts; and prevents the motor from deforming or breaking in a complex environment, thereby preventing the safe use of the equipment.

[0048] like Figure 4 As shown, it should be noted that four end cover triangular ribs 11 are provided on the surface of the end cover 2 in the clockwise directions of 1:30, 4:30, 7:30 and 10:30; the end cover triangular ribs 11 are a triple triangular rib structure, which is used to enhance the overall stability of the end cover 2.

[0049] It should be further explained that the end cover triangular rib 11 is sufficient to bear the weight of the motor rotor 1 on the one hand; on the other hand, it achieves the purpose of shock absorption while ensuring the stability of the motor operation.

[0050] like Figure 2 As shown, it needs to be further explained that the outer ring of the end cover 2 is provided with multiple oil inlet nozzles 7 to facilitate online oiling of the motor.

[0051] In this specific embodiment, the materials of the motor base 14 and the end cover 2 are both HT250 high-strength cast iron, so that the entire motor frame has good strength and shock absorption.

[0052] like Figure 3 As shown, it should be noted that a motor base mounting pile 8 is provided on the connection surface between the motor base 14 and the end cover 2 ; and a 45° separate heat sink 16 is provided on the outer side of the motor base 14 .

[0053] It should be further explained that the base mounting pile 8 is a thickened structure to prevent the tail of the connecting bolt 3 from leaking out and being exposed to environmental radiation; the base mounting pile 8 is fixedly connected to the 45° separate heat sink 16 to enhance strength.

[0054] like Figure 4 As shown, it should be noted that an end cover mounting pile 10 is provided on the connection surface between the end cover 2 and the motor base 14 ; the position of the end cover mounting pile 10 corresponds to the position of the base mounting pile 8 one by one.

[0055] The end cover mounting pile 10 is a wide structure, and the base mounting pile 8 is a narrow structure; the end cover mounting pile 10 and the base mounting pile 8 are dislocated after assembly, thereby facilitating the disassembly and maintenance of the motor.

[0056] In this specific embodiment, the control junction box 5 and the power junction box 4 are installed separately to avoid electromagnetic interference between the 380VAC strong power junction box 4 and the 24V DC weak current control junction box 5, thereby causing control misjudgment.

[0057] like Figure 5 As shown, it should be noted that the centrifugal fan 6 is a box-type frame structure; a centrifugal fan frame support rib 12 is provided on the front of the centrifugal fan 6; the centrifugal fan frame support rib 12 is a closed structure, which is used to ensure the overall tensile strength and seismic strength.

[0058] like Figure 6 As shown, it needs to be further explained that a centrifugal fan air inlet 13 is provided on the back of the centrifugal fan 6; the centrifugal fan air inlet 13 adopts an enlarged structure to increase the outer diameter of the fan, increase the air inlet area, and thus improve the heat dissipation capacity of the motor.

[0059] In this specific embodiment, the air inlet area of ​​the centrifugal fan air inlet 13 is 72000mm 2 , compared with conventional motors in the prior art, it is increased by 1 to 1.5 times.

[0060] In the foregoing detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that embodiments of the claimed subject matter require more features than are expressly recited in each claim. On the contrary, as reflected in the appended claims, the invention comprises less than all the features of any individual disclosed embodiment. The appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0061] The above description of the disclosed embodiments is intended to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments presented herein but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0062] The foregoing description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purposes of describing the above embodiments, but one of ordinary skill in the art will recognize that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to encompass all such changes, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent the term "comprising" is used in the specification or claims, the term is intended to be encompassed in a manner similar to the term "including," as explained in terms of "including," used as a transitional word in the claims. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or."

[0063] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor structure for a circular bridge crane for a nuclear power plant, characterized by: The invention comprises a motor rotor (1), an end cover (2), connecting bolts (3), a power junction box (4), a control junction box (5), a centrifugal fan (6), and a motor base (14), wherein: The top of the motor base (14) is provided with a mounting platform (15); the side of the motor base (14) is provided with a base independent pile (9); The power junction box (4) is mounted on the mounting platform (15); The control junction box (5) is mounted on the machine base independent pile (9); The end cover (2) is mounted at a corresponding position on the motor base (14) via the connecting bolts (3); The centrifugal fan (6) is mounted at the end of the motor base (14).

2. The motor structure of the circular bridge crane for a nuclear power plant according to claim 1, characterized in that: The rotating shaft of the motor rotor (1) is made of high-strength forged steel.

3. The motor structure of the circular bridge crane for a nuclear power plant according to claim 2, characterized in that: Four end cover triangular ribs (11) are provided on the surface of the end cover (2) in the clockwise directions of 1:30, 4:30, 7:30 and 10:30; the end cover triangular ribs (11) are a triple triangular rib structure.

4. The motor structure of the circular bridge crane for a nuclear power plant according to claim 3, characterized in that: The outer ring of the end cover (2) is provided with a plurality of oil inlet nozzles (7).

5. The motor structure of the circular bridge crane for a nuclear power plant according to claim 4, characterized in that: The connection surface between the motor base (14) and the end cover (2) is provided with a base mounting pile (8); the outer side of the motor base (14) is provided with a 45° independent heat sink (16); The machine base mounting pile (8) is a thickened structure; the machine base mounting pile (8) is fixedly connected to the 45° independent heat sink (16).

6. The motor structure of the circular bridge crane for a nuclear power plant according to claim 5, characterized in that: An end cover mounting pile (10) is provided on the connection surface between the end cover (2) and the motor base (14); the position of the end cover mounting pile (10) corresponds to the position of the base mounting pile (8); The end cover mounting pile (10) is a wide slab structure, and the machine base mounting pile (8) is a narrow slab structure; the end cover mounting pile (10) and the machine base mounting pile (8) are dislocated after being assembled.

7. The motor structure of the circular bridge crane for a nuclear power plant according to claim 6, characterized in that: The centrifugal fan (6) is a box-type frame structure; a centrifugal fan frame support rib (12) is provided on the front of the centrifugal fan (6); and the centrifugal fan frame support rib (12) is a closed structure.

8. The motor structure of the circular bridge crane for a nuclear power plant according to claim 7, characterized in that: The back of the centrifugal fan (6) is provided with a centrifugal fan air inlet (13); the air inlet area of ​​the centrifugal fan air inlet (13) is 72000mm 2 .

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