Cooling device for rotor magnet yoke thermal bonding center body

Abstract

The utility model discloses a rotor magnet yoke hot keying center body cooling device, a center body comprises a plurality of rotor vertical ribs vertically arranged on the peripheral wall, and the cooling device comprises a cooling vertical pipe, a cooling water supply pipe, a cooling water drainage pipe, a fixing device and a cooling water pump. The cooling vertical pipes are arranged on two sides of each rotor vertical rib through fixing devices, the upper ends of the vertical pipes are connected with cooling drain pipes, the lower ends of the vertical pipes are connected with cooling water supply pipes, and the cooling water supply pipes are communicated with a cooling water pump to supply cooling water to the whole cooling system. According to the utility model, two sets of cooling vertical pipes are arranged on two sides of each rotor vertical rib and are fixed through the tensioner, so that the use is reliable and convenient; the cooling vertical pipe can more effectively reduce the temperature transmitted to the vertical rib; by arranging the exhaust valve, generated hot steam can be exhausted in time, and the cooling efficiency is higher; the independent cooling pump set and the control valve can adjust the flow of cooling water in time, heat transferred to the rotor vertical ribs can be effectively blocked, it is guaranteed that only the magnet yoke section expands, and the keying quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydropower engineering installation equipment design technology, specifically a rotor magnetic yoke hot-pressing center cooling device. Background Technology

[0002] As one of the important components of a generator, the generator rotor's main function is to generate a magnetic field and produce electrical energy by rotating and cutting magnetic lines of force. The rotor typically consists of a central body, a yoke section, and magnetic poles. After assembly in the installation room, the entire rotor is hoisted into the generator pit.

[0003] During rotor assembly in the installation room, after all the yokes are installed, the yokes and the central body ribs need to be keyed by heating to ensure an interference fit between the yoke section and the central body. Ensuring that the central body is not affected by thermal expansion during the hot keying process is crucial.

[0004] Currently, the industry lacks a comprehensive cooling system for hot-bonding the yoke section and the center body. Some power plants use a method of wrapping cotton cloth around the vertical ribs and spraying water on the cloth for cooling. While some power plants employ cooling devices, the contact area between the cooling pipes and the vertical ribs is small, and the use of flexible hoses results in an unstable cooling water source and poor on-site construction practices. Neither of these methods effectively reduces the temperature of the center body's vertical ribs, causing them to expand during heating and thus failing to guarantee the required keying gap. Furthermore, the haphazard arrangement does not meet the increasingly stringent requirements for civilized construction. Therefore, this utility model proposes a cooling device for the center body of the rotor yoke during hot-bonding. Summary of the Invention

[0005] This utility model discloses a rotor magnetic yoke hot-bonding center cooling device. The purpose of this utility model is to provide a reliable, safe, clean, and efficient rotor magnetic yoke hot-bonding center cooling device.

[0006] The technical solution adopted in this utility model is:

[0007] A rotor yoke hot-forging keying center body cooling device, wherein the center body includes several rotor ribs vertically arranged on the periphery of the center body, characterized in that: the cooling device includes a cooling riser, a cooling water supply pipe, a cooling drain pipe, a fixing device, and a cooling water pump; the cooling riser is arranged on both sides of each rotor rib through the fixing device, the upper end of the riser is connected to the cooling drain pipe, the lower end of the riser is connected to the cooling water supply pipe, and the cooling water supply pipe is connected to the cooling water pump to supply cooling water to the entire cooling system.

[0008] Furthermore, the cooling riser is a hollow hot water pipe with a rectangular cross-section and a flat contact surface with the rotor rib. It consists of left and right cooling risers, which are arranged on both sides of the rotor rib, with two cooling risers on each side. The upper and lower ends of the two cooling risers arranged opposite each other on both sides of the rotor rib are connected by a tensioner, and the two cooling risers are pressed and fixed to the surface of the rotor rib. The lower end of the cooling riser has a union joint that connects to the cooling water supply pipe, and the upper end of the cooling riser has a union joint that connects to the cooling drain pipe.

[0009] Furthermore, the cooling water supply pipes are arranged below the central body, with a main water inlet and branch water supply pipes corresponding to the rotor vertical ribs. The main water inlet is equipped with a water inlet control valve and connected to the cooling water pump. Each pair of branch water supply pipes has four interfaces for connecting to the four cooling vertical pipes for water supply. The branch water supply pipes are connected to the cooling vertical pipes via flexible hoses.

[0010] Furthermore, the cooling drain pipes are arranged above the central body, with a main drain pipe and branch drain pipes corresponding to the rotor risers. The main drain pipe is equipped with a drain control valve and an exhaust valve. Each pair of branch drain pipes has four interfaces for connecting to the four cooling risers for drainage. The branch drain pipes are connected to the cooling risers via flexible hoses.

[0011] The inlet control valve and water supply pump provide a reliable cooling water source for the entire cooling system. The outlet control valve adjusts the drainage flow rate, and the vent valve is used to expel gases from inside the cooling system, ensuring cooling efficiency.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention features two sets of cooling risers on either side of each rotor rib in the central body, secured by tensioners for reliable and convenient operation. The cooling risers are planar rectangular hollow hot water pipes, significantly increasing the cooling contact area and effectively reducing the temperature transferred to the ribs. Exhaust valves on the cooling drain pipes promptly expel generated hot steam, further enhancing cooling efficiency. Independent cooling pump sets and control valves adjust the cooling water flow according to temperature, ensuring a reliable cooling water supply. The upper and lower cooling pipes are arranged in a compact and neat manner, resulting in a clean and orderly construction site. These cooling measures effectively prevent heat transfer to the rotor ribs during keying of the rotor yoke, ensuring only the yoke section expands, achieving the required keying gap in one pass, improving work efficiency, guaranteeing keying quality, and enhancing the site appearance. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of the overall installation structure of the device of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the device of this utility model;

[0016] Figure 3 This is a schematic diagram of the cooling water supply pipe of the device of this utility model;

[0017] Figure 4 This is a schematic diagram of the cooling drain pipe of the device of this utility model;

[0018] Figure 5 This is a schematic diagram of the riser arrangement and fastening installation of the device of this utility model.

[0019] Figure reference numerals:

[0020] 1-Rotor center body. 1.1-Rotor vertical rib; 2-Cooling water supply pipe, 2.1-Cooling water supply ring pipe, 2.2-Water supply hose, 2.3-Water supply branch pipe, 2.4-Main water inlet; 3-Cooling drain pipe, 3.1-Cooling drain ring pipe, 3.2-Drain hose, 3.3-Drain branch pipe, 3.4-Main drain outlet, 3.5-Exhaust valve; 4-Cooling riser, 4.1-Right riser, 4.2-Left riser, 4.3-Upper end union, 4.4-Lower end union, 4.5-Tensioner; 5-Cooling pump; 6-Water inlet control valve; 7-Drain control valve. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0022] Refer to the attached diagram.

[0023] like Figures 1-5 As shown, the rotor magnetic yoke hot-forging key center cooling device of this utility model includes: a cooling water supply pipe 2, a cooling drain pipe 3, a cooling riser 4, a cooling water pump 5, an inlet control valve 6, and an outlet control valve 7.

[0024] After the magnetic yoke on the rotor center body 1 is assembled in the installation room, two sets of right-side vertical pipes 4.1 and left-side vertical pipes 4.2 are symmetrically installed on both sides of the rotor vertical rib 1.1 of each rotor center body 1. The left and right vertical pipes are fixed to the surface of the rotor vertical rib 1.1 by tensioners 4.5.

[0025] After the cooling riser 4 is installed and fixed, the cooling water supply pipe 2 is installed. A water supply hose 2.2 is installed at the lower end of each cooling riser 4, and the water supply hose 2.2 is connected to the cooling riser 4 through the union 4.4 at the lower end of the cooling riser 4. On site, according to the actual height, the cooling water supply ring pipe 2.1 is fixed to a suitable height using temporary supports. Then, the water supply branch pipe 2.3 is connected to the water supply hose 2.2. The water inlet control valve 6 at the main water inlet 2.4 is installed and fixed with support.

[0026] After the cooling water supply pipe 2 is installed, the cooling drain pipe 3 is installed. A drain hose 3.2 is installed at the upper end of each cooling riser 4, and the drain hose 3.2 is connected to the cooling riser 4 through the union 4.3 at the upper end of the cooling riser 4. On site, according to the actual height, the cooling drain ring pipe 3.1 is fixed to a suitable height using temporary supports. Then, the drain branch pipe 3.3 is connected to the drain hose 3.2. An air vent valve 3.5 and a drain control valve 7 at the main drain outlet 3.4 are installed on the cooling drain pipe 3.1 and fixed with supports. The drain outlet is then connected to the drain tank.

[0027] After the cooling drain pipe 3 is installed, the cooling water pump 5 is installed, and the entire cooling system is debugged. First, the pump body is debugged to ensure that the current and direction of rotation are correct. Then, a water filling and leakage check is performed. After the check is correct, the heating device is arranged. During the heating process, the control valve is adjusted according to the temperature at the rotor rib 1.1 and the outlet water temperature to maximize the cooling efficiency and ensure that the central body and rotor rib 1.1 do not expand.

Claims

1. A cooling device for the hot-pressed core of a rotor yoke, the core comprising a plurality of rotor ribs vertically arranged on the peripheral wall of the core, characterized in that: The cooling device includes a cooling riser, a cooling water supply pipe, a cooling drain pipe, a fixing device, and a cooling water pump. The cooling riser is arranged on both sides of each rotor rib through the fixing device. The upper end of the riser is connected to the cooling drain pipe, and the lower end of the riser is connected to the cooling water supply pipe. The cooling water supply pipe is connected to the cooling water pump to supply cooling water to the entire cooling system.

2. The rotor magnetic yoke hot-bonding center cooling device according to claim 1, characterized in that: The cooling riser is a hollow hot water pipe with a rectangular cross-section and a flat contact surface with the rotor rib. It consists of left and right cooling risers, which are arranged on both sides of the rotor rib, with two cooling risers on each side. The upper and lower ends of the two cooling risers arranged opposite each other on both sides of the rotor rib are connected by a tensioner, which presses and fixes the two cooling risers on the surface of the rotor rib. The lower end of the cooling riser has a union joint that connects to the cooling water supply pipe, and the upper end of the cooling riser has a union joint that connects to the cooling drain pipe.

3. The rotor magnetic yoke hot-forging key center cooling device according to claim 1, characterized in that: The cooling water supply pipes are arranged below the central body, with a main water inlet and branch water supply pipes corresponding to the rotor vertical ribs. The main water inlet is equipped with a water inlet control valve and connected to the cooling water pump. Each pair of branch water supply pipes has four interfaces for connecting to the four cooling vertical pipes for water supply. The branch water supply pipes are connected to the cooling vertical pipes via flexible hoses.

4. The rotor magnetic yoke hot-bonding center cooling device according to claim 1, characterized in that: The cooling drain pipes are arranged above the central body, with a main drain pipe and branch drain pipes corresponding to the rotor risers. The main drain pipe is equipped with a drain control valve and an exhaust valve. Each pair of branch drain pipes has four interfaces for connecting to the four cooling risers for drainage. The branch drain pipes are connected to the cooling risers via flexible hoses.

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