Low-temperature-rise and light-weight integral base of high-capacity synchronous generator

Abstract

The invention discloses a low-temperature-rise and light-weight integral base of a high-capacity synchronous generator, relates to the technical field of generators, and provides the following scheme aiming at the problems of multiple turnover procedures among multiple components, larger processing amount, heavier weight, inconvenience in installation of part of components and quicker temperature rise in the generator in the background technology. Comprising a main shaft, a rotor and two rotor spacer rings, a stator core is arranged inside and outside the rotor, a plurality of ventilation holes distributed circumferentially are formed in the outer wall of one side of the stator core, a cylinder is arranged outside the stator core, machine base partition plates are arranged at the two ends of the cylinder, and a plurality of mounting holes are formed in the outer walls of one sides of the two machine base partition plates. Hollow steel is embedded in the multiple mounting holes, and a stator pressing ring is arranged on one side of the stator iron core. The invention has the advantages of effectively reducing the production cost of the generator, reducing the turnover frequency in the production process, reducing the potential safety hazard in production, reducing the weight of the generator and the like, and has the advantage of low temperature rise.

Description

Technical Field

[0001] The invention relates to the technical field of generators, and in particular to a low-temperature rise and lightweight integral machine base of a large-capacity synchronous generator. Background Art

[0002] A generator is a mechanical device that converts mechanical energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator, which then converts it into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology, and daily life. There are many forms of generators, but their working principles are all based on the law of electromagnetic induction and the law of electromagnetic force.

[0003] The base of the generator carries the fixed stator and plays an important role in bearing electromagnetic torque. The larger the power capacity of the generator, the larger its stator, and the larger and heavier the base of the motor body. At present, many larger synchronous generators use a three-section base. The three sections need to meet the corresponding stiffness and strength. Not only is the weight heavier, but the segmented components also have a high turnover. The connection needs to be made with bolts, with more mating surfaces and more processing. The air guide at the end of the driving end envelope winding is inconvenient to install. Summary of the invention

[0004] The present invention provides a low-temperature rise and lightweight integral machine base for a large-capacity synchronous generator, which solves the problems of the prior art of having many turnover processes between multiple components, large processing volume, heavy weight, inconvenient installation of some components, and rapid temperature rise inside the generator.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A low-temperature rise, lightweight integral base of a large-capacity synchronous generator comprises a main shaft, a rotor and two rotor spacer rings, a stator core is arranged inside and outside the rotor, and a plurality of circumferentially distributed ventilation holes are opened on the outer wall of one side of the stator core, a cylinder is arranged outside the stator core, and base partitions are arranged at both ends of the cylinder, a plurality of mounting holes are opened on the outer wall of one side of the two base partitions, and hollow steel is embedded in the plurality of mounting holes, a stator pressure ring is arranged on one side of the stator core, and an air guide is arranged on one side of the stator pressure ring, a stator spacer ring is arranged on one side of the stator core, and end cover chambers are arranged on both sides of the two base partitions.

[0007] Preferably, the rotor is embedded on the outer wall of the main shaft, and two rotor spacer rings are respectively sleeved on the outer walls at both ends of the main shaft, and the two rotor spacer rings are respectively fixed to the outer wall of the main shaft by retaining springs.

[0008] Preferably, the cylinder is sleeved on the outer wall of the stator core, and two base partitions are respectively fixed on the outer walls at both ends of the cylinder.

[0009] Preferably, a plurality of insertion holes are provided on the outer walls of the two base partition rings, and a plurality of fixing holes are provided on the outer walls at both ends of the stator core, and the stator core is fixed to the inner walls of the two base partition rings by a plurality of pins.

[0010] Preferably, a plurality of stoppers are provided on the outer wall of the stator pressure ring, and the stator pressure ring is fixed to the inner wall of the machine base partition ring by means of positioning pins, and the air guide body is fixed to the outer wall on one side of the stator pressure ring.

[0011] Preferably, the stator spacer ring is fixed to the inner wall of the base partition ring by means of positioning pins, and a plurality of circumferentially distributed air inlets are provided on the outer wall of the stator spacer ring.

[0012] Preferably, the two end cover chambers are respectively connected to the outer walls of one side of the two machine base partitions by bolts, and the outer walls of the two end cover chambers are provided with heat dissipation openings distributed at equal distances.

[0013] The beneficial effects of the present invention are:

[0014] The function of the partition in the integrated machine base is divided, and a part of the main functions of stiffness and strength are divided to the pressure ring of the iron core. Therefore, the back ventilation function of the iron core segment is still retained in the stator iron core. The two partitions of the machine base are closed only with a closed cylinder. The stator iron core pressure ring and the partition are fixed and the torque is transmitted by a stopper + heavy-duty pin. At the same time, the installation stopper of the driving end air guide body is reserved on the stator pressure ring, so that the air guide body can be installed on the stator iron core in advance, which is very convenient to operate. Secondly, the non-driving end of the stator iron core optimizes the air inlet path of the motor, and the axial gap at the end of the non-driving end of the stator iron core is increased to reduce Wind resistance, guide part of the cooling air flowing to the axial ventilation holes of the rotor to bend and flow to the back of the stator, thereby achieving the purpose of cooling air flowing through the end of the stator winding, taking away the heat generated by the winding, so that the temperature rise of the generator is lower. Finally, hollow steel is used instead of solid steel in the non-load-bearing part of the base, and the cylinder only meets the processing requirements. The overall strength and rigidity of the generator are achieved by the base and the iron core, thereby achieving the purpose of reducing the weight of the generator base, which can effectively reduce the production cost of the generator, reduce the number of turnovers in the production process, reduce safety hazards in production, reduce the weight of the generator, and has the advantage of low temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the overall front cross-sectional structure of a low-temperature rise and lightweight integral machine base of a large-capacity synchronous generator proposed by the present invention.

[0016] Figure 2This is a schematic diagram of the main cross-sectional structure of the low-temperature rise and lightweight integrated machine base of the large-capacity synchronous generator proposed by the present invention.

[0017] Figure 3 The present invention proposes Figure 2 Enlarged structural diagram at A in the middle.

[0018] Figure 4 This is a schematic diagram of the main structure of the stator core of the low-temperature rise and lightweight integral frame of the large-capacity synchronous generator proposed by the present invention.

[0019] Figure 5 This is a schematic diagram of the main structure of the base partition of the low-temperature rise and lightweight integral base of the large-capacity synchronous generator proposed by the present invention.

[0020] Figure 6 This is a schematic diagram of the main structure of the stator spacer ring of the low-temperature rise and lightweight integral base of the large-capacity synchronous generator proposed by the present invention.

[0021] In the figure: 1, main shaft; 2, rotor; 3, rotor spacer ring; 4, stator core; 5, cylinder; 6, base partition; 61, hollow steel; 7, stator pressure ring; 8, air guide body; 9, stator spacer ring; 10, end cover chamber. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1, reference Figure 1-3, a low-temperature rise, lightweight integral machine base of a large-capacity synchronous generator, comprising a main shaft 1, a rotor 2 embedded in the outer wall of the main shaft 1 and two rotor spacer rings 3 respectively sleeved on the outer walls at both ends of the main shaft 1, the two rotor spacer rings 3 are respectively fixed to the outer wall of the main shaft 1 by a retaining spring, a stator core 4 is provided inside and outside the rotor 2, and a plurality of circumferentially distributed ventilation holes are opened on the outer wall of one side of the stator core 4, a cylinder 5 is provided outside the stator core 4, the cylinder 5 is sleeved on the outer wall of the stator core 4, and a machine base partition 6 is provided at both ends of the cylinder 5, and two machine base partitions 6 are respectively fixed on the outer walls at both ends of the cylinder 5, a plurality of mounting holes are opened on the outer wall of one side of the two machine base partitions 6, and hollow steel 61 is embedded in the plurality of mounting holes, a plurality of jacks are opened on the outer wall of the two rings of the base partition 6, and a plurality of vents are opened on the outer wall of the stator core 4 at both ends of the stator core 4. A plurality of fixing holes are provided, the stator core 4 is fixed to the inner wall of the circular ring of the two machine base partitions 6 by a plurality of pins, a stator pressure ring 7 is provided on one side of the stator core 4, a plurality of stoppers are provided on the outer wall of the stator pressure ring 7, and the stator pressure ring 7 is fixed to the inner wall of the circular ring of the machine base partition 6 by a locating pin, and an air guide body 8 is provided on one side of the stator pressure ring 7, and the air guide body 8 is fixed on the outer wall of one side of the stator pressure ring 7, a stator spacer ring 9 is provided on one side of the stator core 4, the stator spacer ring 9 is fixed to the inner wall of the circular ring of the machine base partition 6 by a locating pin, and a plurality of circumferentially distributed air inlets are provided on the outer wall of the stator spacer ring 9, end cover chambers 10 are provided on both sides of the two machine base partitions 6, the two end cover chambers 10 are respectively connected to the outer wall of one side of the two machine base partitions 6 by bolts, and the outer walls of the two end cover chambers 10 are provided with heat dissipation ports distributed at equal distances.

[0024] The function of the partition in the integrated machine base is divided, and a part of the main functions of stiffness and strength are divided to the pressure ring of the core, so the back ventilation function of the core segment is still retained in the stator core 4, and the two partitions of the machine base are closed only by a closed cylinder. The stator pressure ring 7 and the partition are fixed and the torque is transmitted by the stopper and the positioning pin. At the same time, the installation stopper of the driving end air guide 8 is reserved on the stator pressure ring 7, so that the air guide can be installed on the stator core 4 in advance. Secondly, the non-driving end of the stator core 4 optimizes the motor progress. The wind path is improved by increasing the axial gap at the non-driving end of the stator core 4 to reduce wind resistance, and guiding a part of the cooling air flowing to the axial ventilation hole of the rotor to bend and flow to the back of the stator, so as to achieve the purpose of cooling air flowing through the end of the stator winding, taking away the heat generated by the winding, so that the temperature rise of the generator is relatively low. Finally, hollow steel 61 is used to replace solid steel in the non-load-bearing part of the base, and the cylinder only meets the processing requirements. The overall strength and rigidity of the generator are jointly achieved by the base and the core, thereby achieving the purpose of reducing the weight of the generator base.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-temperature rise, lightweight integrated machine base for a large-capacity synchronous generator, comprising a main shaft (1), a rotor (2) and two rotor spacer rings (3), characterized in that: A stator core (4) is provided inside and outside the rotor (2), and a plurality of ventilation holes distributed in a circumferential pattern are provided on the outer wall of one side of the stator core (4). A cylinder (5) is provided outside the stator core (4), and a base partition (6) is provided at both ends of the cylinder (5). A plurality of mounting holes are provided on the outer wall of one side of the two base partitions (6), and hollow steel (61) is embedded in the plurality of mounting holes. A stator pressure ring (7) is provided on one side of the stator core (4), and an air guide (8) is provided on one side of the stator pressure ring (7). A stator partition ring (9) is provided on one side of the stator core (4), and end cover chambers (10) are provided on both sides of the two base partitions (6).

2. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: The rotor (2) is embedded in the outer wall of the main shaft (1), and two rotor spacer rings (3) are respectively sleeved on the outer walls at both ends of the main shaft (1), and the two rotor spacer rings (3) are respectively fixed to the outer wall of the main shaft (1) by means of retaining springs.

3. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: The cylinder (5) is sleeved on the outer wall of the stator core (4), and two base partitions (6) are respectively fixed on the outer walls at both ends of the cylinder (5).

4. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: A plurality of insertion holes are provided on the outer walls of the two base partitions (6), and a plurality of fixing holes are provided on the outer walls at both ends of the stator core (4). The stator core (4) is fixed to the inner walls of the two base partitions (6) by means of a plurality of latches.

5. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: The outer wall of the stator pressure ring (7) is provided with a plurality of stoppers, and the stator pressure ring (7) is fixed to the inner wall of the circular ring of the machine base partition (6) by means of positioning pins, and the air guide body (8) is fixedly arranged on the outer wall of one side of the stator pressure ring (7).

6. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: The stator spacer ring (9) is fixed to the inner wall of the circular ring of the base partition plate (6) by means of positioning pins, and a plurality of air inlets distributed in a circumference are provided on the outer wall of the stator spacer ring (9).

7. The low-temperature rise and lightweight integrated machine base of a large-capacity synchronous generator according to claim 1, characterized in that: The two end cover chambers (10) are respectively connected to the outer walls of one side of the two machine base partitions (6) by bolts, and the outer walls of the two end cover chambers (10) are provided with heat dissipation openings distributed at equal distances.

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