Marine brushless double-excitation shaft generator

Abstract

The utility model discloses a marine brushless double-excitation shaft generator, which relates to the field of double-excitation shaft generators, and comprises a rotor, a stator, a first brushless excitation system and a second brushless excitation system, the rotor is arranged in a generator shell through a bearing, a magnetic pole is arranged on the rotor, the stator surrounds the periphery of the rotor, and the first brushless excitation system and the second brushless excitation system are arranged in the generator shell. An armature winding is arranged on the stator, an electric brush and a slip ring are removed, faults caused by abrasion and poor contact are avoided, the reliability and stability of the generator are greatly improved, the downtime is shortened, a double-excitation system can flexibly adjust excitation modes and parameters according to different working conditions, and the power generation efficiency and the electric energy quality are remarkably improved. And the power requirements under various complex working conditions are met.

Description

Technical Field

[0001] This utility model relates to the field of dual-excitation shaft-driven generators, and in particular to a marine brushless dual-excitation shaft-driven generator. Background Technology

[0002] Traditional shaft-driven generators use brushed excitation, and the brushes and slip rings are prone to wear and sparking during long-term operation, leading to poor contact. This not only reduces power generation efficiency but also requires frequent maintenance and replacement, increasing operating costs. In applications such as shipbuilding and industry, where the stability and reliability of power supply are extremely critical, this unstable power supply severely impacts the normal operation of equipment.

[0003] Furthermore, a single excitation method is insufficient to flexibly cope with complex and ever-changing operating conditions, making it difficult to guarantee the quality of power generation.

[0004] Therefore, it is necessary to propose a marine brushless dual-excitation shaft-driven generator to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a marine brushless dual-excitation shaft generator to solve the problem that a single excitation method is difficult to flexibly cope with complex and ever-changing working conditions and that the power generation quality is difficult to guarantee.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a marine brushless dual-excitation shaft generator, comprising a rotor, a stator, a first brushless excitation system and a second brushless excitation system, wherein the rotor is mounted in the generator housing via bearings and is provided with magnetic poles, and the stator is surrounded around the outer periphery of the rotor and is provided with armature windings.

[0007] Two detection ports are opened on the outside of the generator housing, and a detection line is installed in each of the two detection ports. A vibration sensor and a speed sensor are fixed inside the generator housing. The vibration sensor and the speed sensor are both connected to the detection line. A sliding sleeve is slidably installed inside the detection port. The sliding sleeve is sleeved on the outside of the detection line, and springs are fixed between both sides of the sliding sleeve and the inner wall of the detection port.

[0008] Multiple semi-circular elastic blocks are fixed inside the outlet of the detection port. The multiple semi-circular elastic blocks abut against the outer side of the corresponding detection line. An adsorption port is opened on the side of the multiple semi-circular elastic blocks near the center of the detection port.

[0009] The first brushless excitation system includes a permanent magnet generator, a rotating rectifier, and an excitation winding. The stator of the permanent magnet generator is fixed on the generator housing, and the rotor of the permanent magnet generator is coaxially connected to the rotor of the main generator.

[0010] The system includes an AC excitation power supply, a static frequency converter, and a rotary transformer. The AC excitation power supply is adjusted to an AC current with a suitable frequency and amplitude by the static frequency converter and transmitted to the secondary side through the primary side of the rotary transformer to provide AC excitation current for the AC excitation winding.

[0011] Multiple semi-circular elastic blocks are evenly distributed along the inner side of the outlet of the detection port, and the multiple semi-circular elastic blocks are elastic.

[0012] Sliding grooves are provided on the inner walls of both sides of the detection port, and sliders are fixed on both sides of the sliding sleeve. The two sliders slide and engage with the corresponding sliding grooves.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By eliminating brushes and slip rings, failures caused by wear and poor contact are avoided, significantly improving the reliability and stability of the generator and reducing downtime. The dual-excitation system can flexibly adjust the excitation mode and parameters according to different operating conditions, significantly improving power generation efficiency and power quality, and meeting the power demand under various complex operating conditions.

[0015] 2. In actual installation, the detection lines of the vibration sensor and speed sensor can be led out from the detection port. The detection port can protect the detection lines. When the detection line is pulled by the outside, the detection line drives the sliding sleeve on the outside to slide. Through the action of the spring, the pulling force can be buffered and the detection line can be reset at the same time to avoid excessive pulling force, which could cause the detection line to sag and break. Multiple semi-circular elastic blocks can prevent external dust from entering the interior of the detection port. At the same time, the resisting action can clamp the detection line to prevent the detection line from shifting.

[0016] 3. When the detection line is pressed against the surface of multiple semi-circular elastic blocks, the pressing force will squeeze out the air inside the adsorption port, forming a negative pressure, which will cause the multiple semi-circular elastic blocks to adhere to the outer skin of the detection line, thereby further increasing the fixing strength of the detection line. In addition, since the position of the semi-circular elastic blocks is fixed, the adsorption force can prevent the detection line from rotating under the action of external force, which would cause the outer skin to crack. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the marine brushless dual-excitation shaft generator of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the detection port of this utility model.

[0019] Figure 3 This is a schematic diagram of the adsorption port of this utility model.

[0020] In the diagram: 1. Generator housing; 2. Detection port; 3. Detection line; 4. Semi-circular elastic block; 5. Sliding sleeve; 6. Spring; 7. Adsorption port. Detailed Implementation

[0021] This utility model provides, for example Figures 1-3 The marine brushless dual-excitation shaft generator shown includes a rotor, a stator, a first brushless excitation system, and a second brushless excitation system. The rotor is mounted in the generator housing 1 through bearings and has magnetic poles. The stator is surrounded around the outer circumference of the rotor and has an armature winding. The first brushless excitation system includes a permanent magnet generator, a rotating rectifier, and an excitation winding. The stator of the permanent magnet generator is fixed to the generator housing 1, and the rotor of the permanent magnet generator is coaxially connected to the rotor of the main generator.

[0022] The second brushless excitation system includes an AC excitation power supply, a static frequency converter, and a rotary transformer. The AC excitation power supply is adjusted to an AC current with a suitable frequency and amplitude by the static frequency converter and transmitted to the secondary side through the primary side of the rotary transformer to provide AC excitation current for the AC excitation winding.

[0023] The specific working principle is as follows: the prime mover drives the rotor to rotate, and the permanent magnet generator generates electricity accordingly. The DC excitation current is provided to the excitation winding of the first excitation system through the rotating rectifier to maintain the basic magnetic field of the generator. According to the working conditions, the AC excitation power supply provides a suitable AC excitation current to the AC excitation winding of the second excitation system through the static frequency converter and the rotary transformer to adjust the output frequency and phase of the generator.

[0024] By eliminating brushes and slip rings, failures caused by wear and poor contact are avoided, significantly improving the reliability and stability of the generator and reducing downtime. The dual-excitation system can flexibly adjust the excitation mode and parameters according to different operating conditions, significantly improving power generation efficiency and power quality, and meeting the power demand under various complex operating conditions.

[0025] Two detection ports 2 are opened on the outside of the generator housing 1. A detection line 3 is set in each of the two detection ports 2. A vibration sensor and a speed sensor are fixed inside the generator housing 1. The vibration sensor and the speed sensor are both connected to the detection line 3. A sliding sleeve 5 is slidably installed inside the detection port 2. The sliding sleeve 5 is sleeved on the outside of the detection line 3, and springs 6 are fixed between both sides of the sliding sleeve 5 and the inner wall of the detection port 2.

[0026] It should be noted that the vibration sensor and speed sensor are connected to an advanced microprocessor to monitor the generator's internal operating parameters in real time, such as vibration and speed. Once an abnormality is detected, an alarm is immediately issued and corresponding protective measures are automatically taken, such as adjusting excitation parameters, limiting load, or shutting down the generator, to ensure safe and stable operation of the generator.

[0027] In actual installation, the detection lines 3 of the vibration sensor and speed sensor can be led out from the detection port 2. The detection port 2 can protect the detection lines 3. When the detection lines 3 are pulled by the outside, the detection lines 3 drive the sliding sleeve 5 on the outside to slide. Through the action of the spring 6, the pulling force can be buffered and the detection lines 3 can be reset at the same time to avoid excessive pulling force, which would cause the detection lines 3 to straighten and break.

[0028] Multiple semi-circular elastic blocks 4 are fixed inside the outlet of the detection port 2. The multiple semi-circular elastic blocks 4 abut against the outer side of the corresponding detection line 3. The multiple semi-circular elastic blocks 4 are evenly distributed along the inner side of the outlet of the detection port 2, and the multiple semi-circular elastic blocks 4 are elastic. Each of the multiple semi-circular elastic blocks 4 has an adsorption port 7 on the side near the center of the detection port 2. When the detection line 3 is pressed against the surface of the multiple semi-circular elastic blocks 7, the extrusion force will squeeze out the air inside the adsorption port 7, forming a negative pressure, so that the multiple semi-circular elastic blocks 7 are adsorbed onto the outer skin of the detection line 3, thereby further increasing the fixing strength of the detection line 3. In addition, since the position of the semi-circular elastic blocks 7 is fixed, under the action of adsorption force, the detection line 3 can be prevented from rotating under the action of external force, which would cause the outer skin to crack.

[0029] Multiple semi-circular elastic blocks 4 can prevent external dust from entering the interior of the detection port 2, and at the same time, the resisting action can clamp the detection line 3 to prevent the detection line 3 from shifting.

[0030] Sliding grooves are provided on both sides of the inner wall of the detection port 2, and sliders are fixed on both sides of the sliding sleeve 5. The two sliders slide and engage with the corresponding sliding grooves.

Claims

1. A marine brushless dual-excitation shaft-driven generator, comprising a rotor, a stator, a first brushless excitation system, and a second brushless excitation system, characterized in that: The rotor is mounted inside the generator housing (1) via bearings. The rotor is provided with magnetic poles. The stator is surrounded around the outer periphery of the rotor and is provided with armature windings. Two detection ports (2) are opened on the outside of the generator housing (1). A detection line (3) is provided in each of the two detection ports (2). A vibration sensor and a speed sensor are fixed inside the generator housing (1). The vibration sensor and the speed sensor are connected to the detection line (3). A sliding sleeve (5) is slidably installed inside the detection port (2). The sliding sleeve (5) is sleeved on the outside of the detection line (3). Springs (6) are fixed between the two sides of the sliding sleeve (5) and the inner wall of the detection port (2).

2. The marine brushless dual-excitation shaft-driven generator according to claim 1, characterized in that: Multiple semi-circular elastic blocks (4) are fixed inside the outlet of the detection port (2). The multiple semi-circular elastic blocks (4) abut against the outer side of the corresponding detection line (3). The multiple semi-circular elastic blocks (4) are provided with an adsorption port (7) on the side of the multiple semi-circular elastic blocks (4) near the center of the detection port (2).

3. A marine brushless dual-excitation shaft-driven generator according to claim 1, characterized in that: The first brushless excitation system includes a permanent magnet generator, a rotating rectifier and an excitation winding. The stator of the permanent magnet generator is fixed on the generator housing (1), and the rotor of the permanent magnet generator is coaxially connected to the rotor of the main generator.

4. A marine brushless dual-excitation shaft-driven generator according to claim 1, characterized in that: The second brushless excitation system includes an AC excitation power supply, a static frequency converter, and a rotary transformer. The AC excitation power supply is adjusted to an AC current with a suitable frequency and amplitude by the static frequency converter and transmitted to the secondary side through the primary side of the rotary transformer to provide AC excitation current to the AC excitation winding.

5. A marine brushless dual-excitation shaft-driven generator according to claim 1, characterized in that: Multiple semicircular elastic blocks (4) are distributed at equal distances along the inner side of the outlet of the detection port (2), and the multiple semicircular elastic blocks (4) are elastic.

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