A quiet diesel generator

Abstract

This invention relates to the field of diesel generators, and in particular to a quiet diesel generator, comprising a chassis unit, a power generation unit mounted on the chassis unit, a sound-absorbing unit mounted on the chassis unit, and a docking unit between the chassis unit and the power generation unit. This invention forms a double-layer common chassis by placing a wire rope vibration isolator and an air spring between the upper and lower base layers, reducing the vibration transmission rate of the diesel generator to the ground during operation and blocking the propagation of engine vibration to the foundation and building structure. Simultaneously, through the installation of a closed enclosure and a hollow layer, an integrated sound-absorbing and sound-insulating cavity is created outside the generator and diesel engine, reducing the noise transmitted by the diesel generator to the outside, enabling the equipment to meet the usage requirements of noise-sensitive areas such as hospitals and residences. This invention also utilizes the fault tolerance capability of the worm gear and gear-driven generator coupling assembly to achieve rapid alignment and periodic adjustment of the generator and diesel engine.

Description

Technical Field

[0001] This invention relates to the field of diesel generators, and in particular to a quiet diesel generator. Background Technology

[0002] As a device that converts the mechanical energy of a diesel engine into electrical energy, the core of a diesel generator set lies in the structural combination and integrated design of the engine and generator. Currently, most diesel generators use single-layer rubber pads for vibration isolation, and the engine and generator are directly rigidly connected or mounted on a common chassis through simple vibration dampers. This results in high vibration transmission rate and significant structural noise. Moreover, traditional units use rigid couplings or disc couplings to directly connect the engine flywheel and generator rotor, which requires high neutrality and cannot isolate torsional vibration. Vibration from the common chassis is transmitted to the generator, which can easily cause additional stress on the generator bearings and increase electromagnetic noise. Summary of the Invention

[0003] In view of the problems in the above-mentioned or existing technologies, such as the direct rigid connection between the engine and generator or the mounting on a common chassis through a simple vibration damper, the vibration transmission rate is high and the structural noise is significant. In addition, traditional units use rigid couplings or disc couplings to directly connect the engine flywheel and the generator rotor, which requires high neutrality and cannot isolate torsional vibration. The vibration of the common chassis is transmitted to the generator, which can easily lead to additional stress on the generator bearings and increased electromagnetic noise. Therefore, this invention is proposed.

[0004] Therefore, the object of the present invention is to provide a quiet diesel generator.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a chassis unit, a power generation unit disposed on the chassis unit, a sound absorption unit disposed on the chassis unit, and a docking unit disposed between the chassis unit and the power generation unit; the power generation unit includes a generator disposed on the docking unit, a diesel engine disposed on the chassis unit, and a coupling assembly connecting the output ends of the generator and the diesel engine.

[0006] As a preferred embodiment of the quiet diesel generator of the present invention, the coupling assembly includes a gear sleeve one disposed on the generator output shaft, a gear sleeve two disposed on the diesel engine output shaft, and an elastic body disposed between the gear sleeve one and the gear sleeve two.

[0007] As a preferred embodiment of the quiet diesel generator of the present invention, the chassis unit includes an upper base, a lower base disposed below the upper base, and a wire rope vibration isolator and an air spring disposed between the upper base and the lower base. The distribution of the wire rope vibration isolators and air springs corresponds to the area along the line connecting the center of mass of the generator and the center of mass of the diesel engine.

[0008] As a preferred embodiment of the quiet diesel generator of the present invention, the sound-absorbing unit includes a perforated cover disposed on the upper base and covering the generator unit, a closed cover covering the perforated cover, a damping layer disposed on the side of the closed cover near the perforated cover, and a hollow layer disposed between the damping layer and the closed cover.

[0009] As a preferred embodiment of the quiet diesel generator of the present invention, the docking unit includes a support block one disposed on the upper base, a support block two slidably disposed on the support block one, a moving component disposed on the support block one, and a lifting component disposed on the support block one.

[0010] As a preferred embodiment of the quiet diesel generator of the present invention, the support block 2 is provided with mounting holes that match the generator.

[0011] As a preferred embodiment of the quiet diesel generator of the present invention, the movable component includes an adjusting screw rotatably mounted on the upper base, a support slider mounted on the support block, and a screw hole mounted on the support slider and cooperating with the adjusting screw; the upper base is provided with a limiting groove cooperating with the support slider.

[0012] As a preferred embodiment of the quiet diesel generator of the present invention, the lifting assembly includes a worm gear rotatably mounted on a support block one, a worm wheel mounted on the support block one and cooperating with the worm gear, a connecting shaft mounted on the worm wheel, a gear mounted on the connecting shaft, and a rack mounted on a support block two and cooperating with the gear; the support block two is provided with a lifting groove cooperating with the gear.

[0013] The beneficial effects of the quiet diesel generator of this invention are as follows: By placing wire rope vibration isolators and air springs between the upper and lower bases to form a double-layer common chassis, this invention reduces the vibration transmission rate of the diesel generator to the ground during operation and blocks the propagation of engine vibration to the foundation and building structure. Simultaneously, through the enclosed enclosure and hollow layer, a sound-absorbing and sound-insulating cavity is formed outside the generator and diesel engine, reducing the noise transmitted by the diesel generator and enabling the equipment to meet the usage requirements of noise-sensitive areas such as hospitals and residences. Furthermore, this invention uses a worm gear and gear to drive the generator, and with the fault tolerance of the coupling assembly, it achieves rapid alignment and periodic adjustment of the generator and diesel engine. Deviations after operation can be corrected without disassembling the coupling assembly, allowing the unit to be maintained without damaging the sound insulation structure and reducing factors contributing to noise generation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a quiet diesel generator.

[0016] Figure 2 This is a schematic diagram of the internal structure of a quiet diesel generator.

[0017] Figure 3 This is a schematic diagram of the power generation unit of a quiet diesel generator.

[0018] Figure 4 This is a schematic diagram of the coupling assembly of a quiet diesel generator.

[0019] Figure 5 This is a schematic diagram of the chassis unit of a quiet diesel generator.

[0020] Figure 6 This is a cross-sectional schematic diagram of the sound-absorbing unit of a quiet diesel generator.

[0021] Figure 7 This is a schematic diagram of the docking unit for a quiet diesel generator.

[0022] Figure 8 This is a schematic diagram of the support block 1 of a quiet diesel generator.

[0023] Figure 9 This is a schematic diagram of the lifting assembly of a quiet diesel generator.

[0024] Figure 10 For quiet diesel generators Figure 9 Enlarged view of point A in the middle.

[0025] In the diagram: 1. Chassis unit; 11. Upper base; 111. Limiting slide groove; 12. Lower base; 13. Steel wire rope vibration isolator; 14. Air spring; 2. Generator unit; 21. Generator; 22. Diesel engine; 23. Coupling assembly; 231. Gear sleeve one; 232. Gear sleeve two; 233. Elastomer; 3. Sound absorption unit; 31. Perforated cover; 32. Enclosed cover; 33. Damping layer; 34. Hollow layer; 4. Connecting unit; 41. Support block one; 42. Support block two; 421. Lifting slide groove; 43. Moving assembly; 431. Adjusting screw; 432. Support slider; 433. Screw hole; 44. Lifting assembly; 441. Worm gear; 442. Worm wheel; 443. Connecting shaft; 444. Gear; 445. Rack. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Example 1, referring to Figure 1 — Figure 3 This is the first embodiment of the present invention, which provides a quiet diesel generator, comprising a chassis unit 1, a power generation unit 2 mounted on the chassis unit 1, a sound-absorbing unit 3 mounted on the chassis unit 1, and a docking unit 4 disposed between the chassis unit 1 and the power generation unit 2. The chassis unit 1 is used for the fixed installation of the power generation unit 2, while reducing the transmission of vibrations to the ground during operation of the power generation unit 2. The power generation unit 2, as the main body of the device, is used to generate electricity using diesel fuel. The sound-absorbing unit 3 is used to completely enclose the power generation unit 2, absorbing and isolating the noise generated during operation. The docking unit 4 is used for quick docking and adjustment of the power generation unit 2, reducing noise sources.

[0028] The power generation unit 2 includes a generator 21 mounted on the docking unit 4, a diesel engine 22 mounted on the chassis unit 1, and a coupling assembly 23 connecting the output ends of the generator 21 and the diesel engine 22. The generator 21 is used to generate electricity under the drive of the diesel engine 22 in conjunction with the connection and transmission of the coupling assembly 23.

[0029] In summary, the generator 21 is first fixedly installed on the docking unit 4, and the diesel engine 22 is fixedly connected to the chassis unit 1. At this time, the generator 21 is driven to move closer to the diesel engine 22 through the docking unit 4. The output ends of the generator 21 and the diesel engine 22 are connected through the cooperation between the coupling assembly 23 and the docking unit 4. At this time, the sound-absorbing unit 3 is connected to the chassis unit 1 through thick rubber pads and bolts. Together with the chassis unit 1, the generator unit 2 is completely covered to form a sound-absorbing and sound-insulating cavity. When the diesel engine 22 starts, the diesel engine 22 drives the output shaft of the generator 21 to rotate through the coupling assembly 23, thereby generating electricity. At this time, the vibration generated by the generator 21 during operation is absorbed and buffered by the chassis unit 1 to reduce the transmission to the ground and prevent the chassis unit 1 from vibrating the ground and generating noise. At the same time, the noise generated by the generator 21 and the diesel engine 22 during operation is absorbed and sound-insulated by the sound-absorbing unit 3, reducing the overall noise generated by the equipment.

[0030] Example 2, refer to Figure 1 - Figure 6This is the second embodiment of the present invention. Unlike the previous embodiment, it provides the specific structure of the chassis unit 1 and sound-absorbing unit 3 in a quiet diesel generator. Compared to embodiment 1, the chassis unit 1 further includes an upper base 11, a lower base 12 disposed below the upper base 11, and a wire rope vibration isolator 13 and an air spring 14 disposed between the upper base 11 and the lower base 12. The upper base 11 provides support for the docking unit 4 and the diesel engine 22, while the lower base 12 is fixedly connected to the ground. The wire rope vibration isolator 13 and the air spring 14 cooperate to form a rubber-metal composite vibration isolation pad between the upper base 11 and the lower base 12, providing sufficient support for the generator unit 2 while preventing vibrations from the generator 21 and the diesel engine 22 from transmitting downwards and generating noise. The distribution positions of the wire rope vibration isolator 13 and the air spring 14 correspond to the area connecting the center of mass of the generator 21 and the center of mass of the diesel engine 22. With this arrangement, while ensuring effective isolation of vibration, the load on the upper base 11 is evenly distributed, maintaining the stable operation of the generator unit 2 on the upper base 11.

[0031] The sound-absorbing unit 3 includes a perforated cover 31 disposed on the upper base 11 and covering the power generation unit 2, a closed cover 32 covering the perforated cover 31, a damping layer 33 disposed on the side of the closed cover 32 near the perforated cover 31, and a hollow layer 34 disposed between the damping layer 33 and the perforated cover 31. The holes on the perforated cover 31, together with the distance between the perforated cover 31 and the power generation unit 2, form a near-field sound-absorbing space to absorb the noise generated by the power generation unit 2 during operation. The damping layer 33, together with the hollow layer 34, forms a cavity sound insulation layer outside the perforated cover 31 to prevent noise from being transmitted to the outside. Both the perforated cover 31 and the closed cover 32 are flexibly connected to the upper base 11 by rubber pads and bolts to avoid solid sound bridges.

[0032] The rest of the structure is the same as in Example 1.

[0033] In summary, when the power generation unit 2 is running, the vibration generated by the overall operation of the power generation unit 2 is transmitted to the ground through the upper base 11. At this time, the steel wire rope vibration isolator 13 and the air spring 14 work together to form a rubber-metal composite vibration isolation pad between the upper base 11 and the lower base 12 to absorb and block the vibration. The noise generated by the operation of the power generation unit 2 is absorbed by the near-field sound absorption space formed by the perforated cover 31 and the power generation unit 2. In addition, the damping layer 33 and the hollow layer 34 form a cavity sound insulation layer outside the perforated cover 31 to block the noise and reduce the noise transmitted from the power generation unit 2 to the outside.

[0034] Example 3, referring to Figure 1 - Figure 10This is the second embodiment of the present invention. Unlike the previous embodiment, it provides a specific structure for the docking unit 4 in the quiet diesel generator. Compared to embodiment 2, the coupling assembly 23 further includes a gear sleeve 231 disposed on the output shaft of the generator 21, a gear sleeve 232 disposed on the output shaft of the diesel engine 22, and an elastic body 233 disposed between the gear sleeve 231 and the gear sleeve 232. The gear sleeve 231 and the gear sleeve 232 are used to engage with each other, enabling transmission between the output ends of the generator 21 and the diesel engine 22. The elastic body 233 serves as a medium for contact between the gear sleeve 231 and the gear sleeve 232, preventing direct contact between the gear sleeve 231 and the gear sleeve 232 from generating noise, effectively isolating the torsional vibration of the diesel engine 22 from being transmitted to the generator 21, and reducing the electromagnetic noise of the generator 21.

[0035] The docking unit 4 includes a support block 41 mounted on the upper base 11, a support block 42 slidably mounted on the support block 41, a moving component 43 mounted on the support block 41, and a lifting component 44 mounted on the support block 41. The support block 41 supports the support block 42. The moving component 43 moves the support block 41 back and forth toward the output end of the diesel engine 22, causing the output ends of the generator 21 and the diesel engine 22 to move closer or further apart. The lifting component 44 moves the support block 42 up and down relative to the support block 41 to coordinate with the moving component 43 to quickly align the output ends of the generator 21 and the diesel engine 22, reducing the additional force on the generator 21 shaft and generating unnecessary noise.

[0036] Among them, the second support block 42 is provided with mounting holes for the generator 21, which are used to install the generator 21 onto the second support block 42.

[0037] The movable component 43 includes an adjusting screw 431 rotatably mounted on the upper base 11, a support slider 432 mounted on the first support block 41, and a screw hole 433 mounted on the support slider 432 and cooperating with the adjusting screw 431. The adjusting screw 431 is used to rotate and drive the support slider 432 to move back and forth through the screw hole 433, thereby driving the first support block 41 and the second support block 42 on the first support block 41 to move, thereby realizing the movement of the position of the generator 21 mounted on the second support block 42. The upper base 11 is provided with a limiting groove 111 that cooperates with the support slider 432, which is used to limit and guide the movement of the support slider 432 to ensure the stability of the movement of the support block 41.

[0038] The lifting assembly 44 includes a worm gear 441 rotatably mounted on a support block 41, a worm wheel 442 mounted on the support block 41 and cooperating with the worm gear 441, a connecting shaft 443 mounted on the worm wheel 442, a gear 444 mounted on the connecting shaft 443, and a rack 445 mounted on a support block 42 and cooperating with the gear 444. The worm gear 441 rotates, driving the worm wheel 442 to rotate. The worm wheel 442 transmits power to the gear 444 through the connecting shaft 443. The meshing relationship between the gear 444 and the rack 445 drives the support block 42 to move up and down relative to the support block 41. The moving assembly 43 is used to fine-tune the position of the output end of the generator 21 to achieve alignment with the output end of the diesel engine 22. The second support block 42 is provided with a lifting groove 421 that engages with the gear 444. The lifting groove 421 is used to engage with the rack 445 to accommodate the gear 444.

[0039] The rest of the structure is the same as in Example 2.

[0040] In summary, when the generator 21 is installed on the second support block 42, rotating the adjusting screw 431 causes the support slider 432 to move towards the diesel engine 22 through the screw hole 433. At this time, rotating the worm gear 441 causes the worm wheel 442 to rotate, which in turn drives the gear 444 to rotate. With the help of the gear 444 and the rack 445, the second support block 42 moves up and down on the first support block 41. With the back and forth movement of the first support block 41, the output end of the generator 21 is aligned with the output end of the diesel engine 22. At this time, the first gear sleeve 231 and the second gear sleeve 232 are fixedly connected to the output ends of the generator 21 and the diesel engine 22, respectively, completing the alignment connection of the output ends of the generator 21 and the diesel engine 22. At this time, the diesel engine 22 starts and drives the generator 21 to generate electricity through the coupling assembly 23.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A quiet diesel generator, characterized in that: It includes a chassis unit (1), a power generation unit (2) disposed on the chassis unit (1), a sound absorption unit (3) disposed on the chassis unit (1), and a docking unit (4) disposed between the chassis unit (1) and the power generation unit (2). The power generation unit (2) includes a generator (21) mounted on the docking unit (4), a diesel engine (22) mounted on the chassis unit (1), and a coupling assembly (23) connecting the output ends of the generator (21) and the diesel engine (22).

2. The quiet diesel generator as described in claim 1, characterized in that: The coupling assembly (23) includes a gear sleeve 1 (231) disposed on the output shaft of the generator (21), a gear sleeve 2 (232) disposed on the output shaft of the diesel engine (22), and an elastic body (233) disposed between the gear sleeve 1 (231) and the gear sleeve 2 (232).

3. The quiet diesel generator as described in claim 2, characterized in that: The chassis unit (1) includes an upper base (11), a lower base (12) located below the upper base (11), and a wire rope vibration isolator (13) and an air spring (14) located between the upper base (11) and the lower base (12). The distribution positions of the wire rope vibration isolator (13) and the air spring (14) correspond to the area of ​​the line connecting the center of mass of the generator (21) and the center of mass of the diesel engine (22).

4. The quiet diesel generator as described in claim 3, characterized in that: The sound-absorbing unit (3) includes a perforated cover (31) disposed on the upper base (11) and covering the power generation unit (2), a closed cover (32) covering the perforated cover (31), a damping layer (33) disposed on the side of the closed cover (32) near the perforated cover (31), and a hollow layer (34) disposed between the damping layer (33) and the closed cover (32).

5. The quiet diesel generator as described in claim 4, characterized in that: The docking unit (4) includes a support block 1 (41) disposed on the upper base (11), a support block 2 (42) slidably disposed on the support block 1 (41), a moving component (43) disposed on the support block 1 (41), and a lifting component (44) disposed on the support block 1 (41).

6. The quiet diesel generator as described in claim 5, characterized in that: The second support block (42) is provided with mounting holes for the generator (21).

7. The quiet diesel generator as described in claim 6, characterized in that: The moving component (43) includes an adjusting screw (431) rotatably mounted on the upper base (11), a support slider (432) mounted on the support block (41), and a screw hole (433) mounted on the support slider (432) and cooperating with the adjusting screw (431). The upper base (11) is provided with a limiting groove (111) that cooperates with the support slider (432).

8. The quiet diesel generator as described in claim 7, characterized in that: The lifting assembly (44) includes a worm gear (441) rotatably mounted on a support block (41), a worm wheel (442) mounted on the support block (41) and cooperating with the worm gear (441), a connecting shaft (443) mounted on the worm wheel (442), a gear (444) mounted on the connecting shaft (443), and a rack (445) mounted on a support block (42) and cooperating with the gear (444). The second support block (42) is provided with a lifting groove (421) that matches the gear (444).

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