A generator rotating rectifier bridge structure
By designing a rotary rectifier bridge structure including hollow shaft and insulated barrel assembly, the problem of difficulty in ensuring strength and safety of the rotary rectifier bridge when rotating at high speed is solved, the effect of normal operation in an oil-in-the-art environment is achieved, and the pressure loss and leakage risk is reduced.
Patent Information
- Application Number
- CN202411898613.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-04-04
AI Technical Summary
The existing rotary rectifier bridge structure is difficult to ensure strength and safety when rotating at high speed, and it is difficult to maintain normal operation in an oil-containing environment.
A rotary rectifier bridge structure including a hollow shaft and an insulating barrel assembly is designed. The insulating barrel assembly is provided with a rotary rectifier bridge assembly to prevent oil leakage through gap fitting and sealing ring grooves, and the rectifier bridge assembly is cooled by lubricating oil.
The high strength and safety of the rotary rectifier bridge is achieved, ensuring normal operation in an oil-in-the-art environment, reducing pressure loss and leakage risks.
Smart Images
Figure CN119765950A_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a generator rotating rectifier bridge structure, belonging to the technical field of oil-cooled generator rectifier structure design. Background Art
[0002] For three-stage generators, the rotating rectifier bridge is the key device to convert the three-phase AC output of the exciter into DC. The DC after the rotating rectifier bridge is transmitted to the excitation of the main generator, so that there is a rotating magnetic field in the air gap of the main generator, which makes the main generator generate an induced potential and finally outputs AC. The key to the design of the rotating rectifier bridge structure is to ensure that the strength of the high-speed rotating rectifier bridge meets the requirements and ensure that it does not break or fall out. It is also necessary to ensure that the rectifier bridge is in an oil environment to ensure its normal operation. Summary of the invention
[0003] The objects of the present invention are:
[0004] The invention aims to provide a rotary rectifier bridge structure which is highly versatile, easy to maintain, convenient to install and disassemble, safe to use and reliable.
[0005] The technical solution of the present invention is: a generator rotating rectifier bridge structure includes the entire rotating rectifier bridge structure, including a hollow shaft 1 and an insulating barrel assembly 2; the insulating barrel assembly 2 is installed in the hollow shaft 1; the insulating barrel assembly 2 includes a rotating rectifier bridge assembly 3, a right end plate 4, a left end plate 5, a bolt 6, an incoming line terminal 7, an outgoing line terminal 8, an insulating barrel 9, and a collector ring 10; the rotating rectifier bridge assembly 3 is installed in the insulating barrel 9 and is fastened by the right end plate 4, the left end plate 5, and the bolt 6; three incoming line terminals 7 and two outgoing line terminals 8 are installed on the insulating barrel 9; the collector ring 10 is plastic-pressed in the insulating barrel 9.
[0006] The rotating rectifier bridge assembly 3 includes two end covers 17, nuts a18, pins 19, and two diode fixing brackets 20; the two diode mounting brackets 20 are stacked together, and three pins 19 pass through the end covers 17 at both ends, and the rotating diode mounting brackets 20 are fastened with nuts a18.
[0007] The diode fixing bracket 20 includes a diode core 21, a heat sink 22, an insulating sleeve 23, a lead wire b24, and a terminal piece 25; the diode core 21 is clamped between the heat sink 22 and the terminal piece 25, the terminal piece 25 is welded to the lead wire b24, passes through the hole on the heat sink 22 and is welded to the lead wire of the diode, and the insulating sleeve 23 is sleeved in the hole on the heat sink 22.
[0008] The incoming terminal 7 and the outgoing terminal 8 have the same structure and both include a screw 11, a terminal lug 12, a metal sleeve 13, an insulating sleeve 14, a nut a15, and a lead wire b16; the terminal lug 12 is fixedly installed on the top of the metal sleeve 13, the nut a15, the metal sleeve 13, and the terminal lug 12 are fixed with the screw 11, the insulating sleeve 14 is sleeved on the metal sleeve 13, and the lead wire b16 is connected to the nut a15.
[0009] There is a boss on both sides of the heat dissipation plate 22 of the diode fixing bracket 20, which is the same size as the outer diameter of the diode and is used for crimping the diode core 21 and the wiring piece 25.
[0010] The device has a gap of 2 mm between the rotating rectifier bridge assembly 3 and the inner wall of the insulating barrel 2 .
[0011] The rectifier bridge assembly 3 is cooled by lubricating oil.
[0012] The device end cover 17 is designed to be conical.
[0013] The two ends of the insulating barrel 9 are provided with sealing ring grooves, so that a dry cavity is formed between the hollow shaft 1 and the insulating barrel 9, and the rectifier bridge will output the line within the range of this dry cavity.
[0014] The beneficial effects of the present invention are:
[0015] Due to space reasons, the present invention adopts a half-bridge structure for the rotating rectifier bridge. Three diodes are connected in sequence by pins and installed in an insulating barrel. The insulating barrel is placed in a hollow shaft, one end of which is attached to the shaft wall, and the other end is radially fixed by screws at the inlet and outlet ends. It is located between the exciter and the main motor rotor in space. For the convenience of installation and maintenance, the insulating barrel and the shaft are clearance-matched. Sealing ring grooves are provided at both ends of the insulating barrel to form a dry cavity between the shaft and the insulating barrel. The rotating rectifier bridge assembly will be wired out within the range of this dry cavity. Prevent oil from spraying out from the outlet hole through the gap between the insulation and the shaft, causing pressure loss and leakage. There is an end cover designed in a conical shape at the inlet and outlet ends of the rectifier bridge to guide the flow and reduce pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the assembly relationship between the rotating rectifier bridge and the hollow shaft;
[0017] Figure 2 This is the external wiring diagram of the rotating rectifier bridge;
[0018] Figure 3 This is a schematic diagram of the rectifier bridge wiring form;
[0019] Figure 4 It is a schematic diagram of a rotating rectifier bridge assembly;
[0020] Figure 5 This is a schematic diagram of the diode fixing bracket.
[0021] Among them: 1-hollow shaft, 2-insulating barrel assembly; 3-rotating rectifier bridge assembly, 4-right end plate, 5-left end plate, 6-bolt, 7-inlet end, 8-outlet end, 9-insulating barrel, 10-collector ring, 17-end cover, 18-nut a, 19-pin, 20-diode fixing bracket, 21-diode core, 22-heat sink, 23-insulating sleeve, 24-lead wire b, 25-wire. DETAILED DESCRIPTION
[0022] The present invention is further described below in conjunction with the accompanying drawings:
[0023] like Figure 1 , Figure 2 As shown, a generator rotating rectifier bridge structure includes the entire rotating rectifier bridge structure, including a hollow shaft 1 and an insulating barrel assembly 2; the insulating barrel assembly 2 is installed in the hollow shaft 1; the insulating barrel assembly 2 includes a rotating rectifier bridge assembly 3, a right end plate 4, a left end plate 5, bolts 6, an incoming line terminal 7, an outgoing line terminal 8, an insulating barrel 9, and a collector ring 10; the rotating rectifier bridge assembly 3 is installed in the insulating barrel 9 and is fastened by the right end plate 4, the left end plate 5, and the bolts 6; three incoming line terminals 7 and two outgoing line terminals 8 are installed on the insulating barrel 9; and the collector ring 10 is plastic-pressed in the insulating barrel 9.
[0024] like Figure 4 As shown, the rotating rectifier bridge assembly 3 includes two end covers 17, a nut a18, a pin 19, and two diode fixing brackets 20; the two diode mounting brackets 20 are stacked together, and three pins 19 pass through the end covers 17 at both ends, and the rotating diode mounting brackets 20 are fastened with nuts a18.
[0025] like Figure 5 As shown, the diode fixing bracket 20 includes a diode core 21, a heat sink 22, an insulating sleeve 23, a lead wire b24, and a terminal piece 25; the diode core 21 is clamped between the heat sink 22 and the terminal piece 25, the terminal piece 25 is welded to the lead wire b24, passes through the hole on the heat sink 22 and is welded to the lead wire of the diode, and the insulating sleeve 23 is sleeved in the hole on the heat sink 22.
[0026] There is a boss on both sides of the heat sink 22 of the diode fixing bracket 20, which is the same size as the outer diameter of the diode and is used to crimp the diode core 21 and the wiring piece 25. The boss ensures good contact between the diode core 21 and the wiring piece 25.
[0027] like Figure 3As shown, the incoming terminal 7 and the outgoing terminal 8 have the same structure and both include a screw 11, a terminal lug 12, a metal sleeve 13, an insulating sleeve 14, a nut a15, and a lead wire b16; the terminal lug 12 is fixedly installed on the top of the metal sleeve 13, the nut a15, the metal sleeve 13, and the terminal lug 12 are fixed with the screw 11, the insulating sleeve 14 is sleeved on the metal sleeve 13, and the lead wire b16 is connected to the nut a15.
[0028] The device has a 2 mm gap between the rotating rectifier bridge assembly 3 and the inner wall of the insulating barrel 2 for heat dissipation.
[0029] The rectifier bridge assembly 3 is cooled by lubricating oil.
[0030] The device end cover 17 is designed to be conical, which can also play a role in guiding flow and reducing pressure loss.
[0031] The two ends of the insulating barrel 9 are provided with sealing ring grooves, so that a dry cavity is formed between the hollow shaft 1 and the insulating barrel 9, and the rectifier bridge will be connected within the range of this dry cavity, so as to prevent the oil from spraying out from the outlet hole through the gap between the insulation and the shaft, causing pressure loss and leakage.
Claims
1. A generator rotating rectifier bridge structure, characterized in that , comprising a hollow shaft (1) and an insulating barrel assembly (2); the insulating barrel assembly (2) is installed in the hollow shaft (1); the insulating barrel assembly (2) comprises a rotating rectifier bridge assembly (3), a right end plate (4), a left end plate (5), bolts (6), an incoming line terminal (7), an outgoing line terminal (8), an insulating barrel (9), and a collector ring (10); the rotating rectifier bridge assembly (3) is installed in the insulating barrel (9) and is fastened by the right end plate (4), the left end plate (5), and the bolts (6); three incoming line terminals (7) and two outgoing line terminals (8) are installed on the insulating barrel (9), and the collector ring (10) is plastic-pressed in the insulating barrel (9).
2. The generator rotating rectifier bridge structure according to claim 1 is characterized in that The rotating rectifier bridge assembly (3) comprises two end covers (17), a nut a (18), a pin (19), and two diode fixing brackets (20); the two diode mounting brackets (20) are stacked together, and the three pins (19) pass through the end covers (17) at both ends and the rotating diode mounting brackets (20) are fastened with nuts a (18).
3. The generator rotating rectifier bridge structure according to claim 2 is characterized in that The diode fixing bracket (20) comprises a diode core (21), a heat sink (22), an insulating sleeve (23), a lead wire b (24), and a wiring piece (25); the diode core (21) is sandwiched between the heat sink (22) and the wiring piece (25); the wiring piece (25) and the lead wire b (24) are welded together, pass through the hole on the heat sink (22) and are welded together with the lead wire of the diode; and the insulating sleeve (23) is sleeved in the hole on the heat sink (22).
4. The generator rotating rectifier bridge structure according to claim 1 is characterized in that The structure of the incoming terminal (7) and the outgoing terminal (8) is the same, and both include a screw (11), a wiring piece (12), a metal sleeve (13), an insulating sleeve (14), a nut a (15), and a lead wire b (16); the wiring piece (12) is fixedly installed on the top of the metal sleeve (13), the nut a (15), the metal sleeve (13), and the wiring piece (12) are fixed by the screw (11), the insulating sleeve (14) is sleeved on the metal sleeve (13), and the lead wire b (16) is connected to the nut a (15).
5. The generator rotating rectifier bridge structure according to claim 2 is characterized in that The heat sink (22) of the diode fixing bracket (20) has a boss on both sides with the same size as the outer diameter of the diode, which is used for crimping the diode core (21) and the wiring piece (25).
6. The generator rotating rectifier bridge structure according to claim 1 is characterized in that There is a gap of 2 mm between the rotating rectifier bridge assembly (3) and the inner wall of the insulating barrel (2).
7. The generator rotating rectifier bridge structure according to claim 1 is characterized in that , the rectifier bridge assembly (3) is cooled by lubricating oil.
8. The generator rotating rectifier bridge structure according to claim 2 is characterized in that , the end cover (17) is designed to be conical.
9. The generator rotating rectifier bridge structure according to claim 1 is characterized in that The two ends of the insulating barrel (9) are provided with sealing ring grooves, so that a dry cavity is formed between the hollow shaft (1) and the insulating barrel (9), and the rectifier bridge will output the line within the range of this dry cavity.