CN111764999A

CN111764999A - Vehicle-mounted low-noise high-efficiency generator

Info

Publication number: CN111764999A
Application number: CN202010668187.8A
Authority: CN
Inventors: 王远锋; 石斌
Original assignee: Anhui Evotec Power Generation Co ltd
Current assignee: Anhui Evotec Power Generation Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-10-13

Abstract

The invention discloses a vehicle-mounted low-noise high-efficiency generator which comprises a base, wherein a closed sound-proof cover is arranged on the base, a generator set is arranged in the sound-proof cover, the generator set is arranged on the base through a damping mechanism, and the damping mechanism is used for reducing the vibration of the generator set in different directions.

Description

Vehicle-mounted low-noise high-efficiency generator

Technical Field

The invention relates to the field of power generation equipment, in particular to a vehicle-mounted low-noise high-efficiency generator.

Background

The generator is mechanical equipment which converts other forms of energy into electric energy, is driven by a water turbine, a steam turbine, a diesel engine or other power machines, converts energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits the mechanical energy to the generator, and then the generator converts the mechanical energy into electric energy. The generator has wide application in industrial and agricultural production, national defense, science and technology and daily life. The generator has many forms, but the working principle is based on the law of electromagnetic induction and the law of electromagnetic force. The general principle of its construction is therefore: appropriate magnetic conductive and electric conductive materials are used to form a magnetic circuit and a circuit which mutually perform electromagnetic induction so as to generate electromagnetic power and achieve the purpose of energy conversion.

On some building sites or in the outage region, often can see the power-generating cars, generally load and have high-efficient diesel generating set on the power-generating cars, because efficiency is big, the noise is also very big, how can effectively fall and make an uproar, is one of the problem that needs to solve at present urgently.

Disclosure of Invention

In order to solve the technical problems, the invention provides a vehicle-mounted low-noise high-efficiency generator which can effectively reduce the vibration of a generator set during power generation, has a good damping effect, effectively reduces noise, can isolate the generator set in a sound-proof cover, further reduces the noise during power generation and achieves the purpose of low-noise power generation.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a vehicular low noise high efficiency generator, includes the base, is equipped with the confined sound-proof housing on the base, has arranged generating set in the sound-proof housing, and generating set is through on passing through damper installation base, and damper is used for subducing the not equidirectional vibrations of generating set.

Preferably: the damping mechanism comprises a damping mechanism A and a damping mechanism B which are assembled together, the damping mechanism A and the damping mechanism B are distributed up and down, the upper end of the damping mechanism A is connected with a support leg of the generator set, the damping mechanism B is fixedly arranged on the base, and the damping mechanism A and the damping mechanism B are matched to reduce the vibration of the generator set in different directions;

through above-mentioned technical scheme, realized upper and lower second grade shock-absorbing function, promoted the shock attenuation effect.

Preferably: the damping mechanism A comprises an A1 rubber piece and an A2 rubber piece, the A1 rubber piece and the A2 rubber piece are distributed up and down, the A2 rubber piece protrudes upwards, a groove is formed in the lower side of the A1 rubber piece, the protrusion is matched with the groove and clamped in the groove, the A1 rubber piece is fixed in an upper connecting seat, the upper connecting seat is fixedly installed on a supporting leg, the A2 rubber piece is fixedly installed in a lower connecting seat, and the lower connecting seat is installed on the damping mechanism B;

through the technical scheme, the function of buffering the vibration from different directions through the rubber is realized.

Preferably: the A2 rubber piece is a conical boss-shaped component, and the groove of the A1 rubber piece is a conical groove matched with the conical boss;

through above-mentioned technical scheme, realized increasing the laminating area between the rubber spare, it is stronger to bear the weight of the shock ability.

Preferably: the damping mechanism comprises a movable seat, a base and a limiting assembly, the movable seat and the base are arranged up and down, the lower connecting seat is installed on the movable seat, an elastic piece is arranged between the movable seat and the base, the elastic direction of the elastic piece is consistent with the direction of a plumb bob, and the limiting assembly is used for restraining the movement of the movable seat on the horizontal plane;

through the technical scheme, the function of elastic buffering is realized.

Preferably: the limiting assembly comprises an A limiting part and a B limiting part, the A limiting part is a groove-shaped component, the groove length direction of the A limiting part is consistent with the plumb direction, the lower end of the A limiting part is fixed on the base, the upper end of the A limiting part is opened, the B limiting part is also a groove-shaped component, the groove length direction of the B limiting part is consistent with the plumb direction, the lower end of the B limiting part is opened and sleeved in the A limiting part, the upper end of the B limiting part is fixed on the movable base, a buffer rubber pad attached to the outer wall of the B limiting part is arranged on the inner wall of the A;

through the technical scheme, the purpose of restricting the movement of the movement on the horizontal plane is achieved.

Preferably: the elastic piece is a spring, the upper end of the spring is fixed on the upper end and the lower end of the movable seat and is fixed on the base;

through the technical scheme, the function of elastic buffering support is realized, the spring is convenient to install, and the use cost is low.

Preferably: the A limiting part and the B limiting part are both formed by two plates which are vertically arranged, the horizontal sections of the two plates are semicircular, and concave surfaces of the two plates are oppositely distributed at intervals;

through the technical scheme, the structure of the A limiting part and the B limiting part is realized, the A limiting part and the B limiting part are easy to process and produce, and the cost is low.

Preferably: the cushion rubber pad consists of two outer rubber pads and an interlayer pad, the interlayer pad is positioned between the two outer rubber pads, and a cushion air cavity is formed in the interlayer pad;

through above-mentioned technical scheme, promoted buffering effect.

Preferably: the section of the interlayer pad vertical to the surfaces of the two outer rubber pads is wavy, and a buffer air cavity is formed by an enclosed area between the interlayer pad and the two outer rubber pads;

through the technical scheme, the production of the cushion rubber pad is easy, the air cavities are uniformly distributed, and the buffering capacity of each part of the cushion rubber pad is equivalent.

Preferably: the heat dissipation mechanism is arranged on the sound-proof housing and penetrates through the sound-proof housing through a water pipe to circularly supply water to the generator set;

through above-mentioned technical scheme, arrange heat dissipation mechanism outside the sound-proof housing, heat dissipation mechanism produces the noise underfooting, is convenient for the heat dissipation simultaneously.

Preferably: the generator set comprises a diesel engine and a generator which are assembled together, the diesel engine drives a heat dissipation fan in the heat dissipation mechanism to rotate through a transmission shaft, a bearing assembly is arranged on the transmission shaft at a position penetrating through the sound-proof shield, the bearing assembly is arranged in the sound-proof assembly, an exhaust pipe of the diesel engine penetrates through the sound-proof shield and extends to the outside, and the exhaust pipe is also connected with the sound-proof shield through the sound-proof assembly;

through the technical scheme, the connection with the sound-proof housing is realized, and the sound-proof effect is ensured.

Preferably: the sound insulation assembly comprises a sleeve with openings at two ends, the sleeve is fixed on the sound insulation cover and is sleeved on the bearing assembly or the exhaust pipe, the axial direction of the sleeve is consistent with the axial direction of the transmission shaft or the length direction of the exhaust pipe, a rubber partition curtain is arranged on the inner wall of the sleeve along the axial direction of the sleeve and used for sealing the area between the inner wall of the sleeve and the bearing assembly or the exhaust pipe;

through above-mentioned technical scheme, can avoid transmitting blast pipe and the epaxial vibrations of transmission to the soundproof cover on, prevent the production of noise.

Preferably: the rubber partition curtains are axially provided with two layers along the sleeve, the two layers of rubber partition curtains are distributed at intervals, and noise reduction cotton filler is arranged between the two layers of rubber partition curtains;

through above-mentioned technical scheme, realized the movable mounting of transmission shaft and blast pipe promptly, also can promote syllable-dividing effect.

Preferably: the sound-proof shield consists of a metal outer layer, a sound-proof interlayer and a flame-retardant noise-reducing layer, wherein the sound-proof interlayer is a density board made of sound-proof cotton, noise-reducing bulges are arranged on the surface of the flame-retardant noise-reducing layer, and the flame-retardant noise-reducing layer is made by mixing gypsum, mineral wool and the like;

through the technical scheme, the purpose of effectively isolating and reducing noise of the sound-proof housing is achieved.

The invention has the technical effects and advantages that: the invention can effectively reduce the vibration of the generator set, thereby reducing the generation of noise, and can isolate the generator set, so that the noise is isolated in a closed space, thereby effectively realizing the purpose of noise reduction and simultaneously ensuring the heat dissipation effect of the heat dissipation mechanism;

the invention has stable structure and reasonable layout, can effectively reduce vibration, reduce noise, isolate noise, realize the purpose of low-noise power generation and meet the current use requirements.

Drawings

Fig. 1 is a schematic structural diagram of a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a damping mechanism in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the invention.

Fig. 3 is a schematic sectional view of a damping mechanism in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the invention.

Fig. 4 is a schematic top view of a limiting member a and a base in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a sound insulation assembly and an exhaust pipe in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the invention.

Fig. 6 is a schematic structural diagram of a sound insulation assembly and a transmission shaft in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the invention.

Fig. 7 is a schematic cross-sectional view of a sound insulation cover in a vehicle-mounted low-noise high-efficiency generator according to an embodiment of the invention.

Description of reference numerals: 100-base, 200-sound-proof cover, 210-metal outer layer, 220-sound-proof interlayer, 230-flame-retardant noise-reduction layer, 231-noise-reduction protrusion, 300-generator set, 310-generator, 320-diesel engine, 321-transmission shaft, 322-exhaust pipe, 323-water pipe, 324-bearing assembly, 325-heat-insulation sleeve, 400-heat-dissipation mechanism, 500-shock-absorption mechanism, 510-A shock-absorption mechanism, 511-A1 rubber piece, 512-A2 rubber piece, 513-upper connecting seat, 514-lower connecting seat, 515-A3 rubber pad, 520-B shock-absorption mechanism, 521-movable seat, 522-base, 523-elastic piece, 524-A limiting piece, 524-plate piece, 525-B limiting piece, 526-buffer rubber pad, 526 a-outer layer rubber pad, 526 b-sandwich rubber mat, 600-sound insulation component, 610-sleeve, 620-rubber curtain and 630-noise reduction cotton filler.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Examples

The invention is described in further detail below with reference to fig. 1-7:

referring to fig. 1, the vehicle-mounted low-noise high-efficiency generator comprises a base 100, wherein a closed sound-proof housing 200 is mounted on the base 100, a generator set 300 is arranged in the sound-proof housing 200, and the generator set 300 is mounted on the base 100 through a damping mechanism 500; when the generator set 300 is used for generating electricity, the generator is generally driven by other power mechanisms to generate electricity, the power mechanisms are common in the diesel engine 320, the diesel engine 320 can generate large noise when in operation, one of the noise sources is that the vibration of the diesel engine 320 is transmitted to the base 100, the vibration is irregular, the vibration directions are various, and therefore through the arrangement of the damping mechanism 500, the vibration of the generator set 300, particularly the vibration of the diesel engine 320 in different directions can be reduced, the noise is effectively reduced, and the purpose of reducing the noise is achieved.

Referring to fig. 2, the damping mechanism 500 includes an a damping mechanism 510 and a B damping mechanism 520 assembled together, the a damping mechanism 510 and the B damping mechanism 520 are distributed up and down, the upper end of the a damping mechanism 510 is connected with the support leg of the generator set 300, and the B damping mechanism 520 is fixedly mounted on the base 100; through the A damper 510 and the B damper 520 that distribute from top to bottom, realize the two-stage shock attenuation, the shock attenuation effect is better, and the two cooperation subdues the not equidirectional vibrations effect of generating set 300 better moreover.

Referring to fig. 3, the a shock absorbing mechanism 510 includes a1 rubber piece 511 and a2 rubber piece 512, the a1 rubber piece 511 and the a2 rubber piece 512 are distributed up and down, the a2 rubber piece 512 protrudes upwards, a groove is arranged on the lower side of the a1 rubber piece 511, the protrusion matches with the groove, the protrusion is clamped in the groove, the a1 rubber piece 511 is fixed in the upper connecting seat 513, the upper connecting seat 513 is fixedly installed on the leg, the a2 rubber piece 512 is fixedly installed in the lower connecting seat 514, and the lower connecting seat 514 is installed on the B shock absorbing mechanism 520; through the mode of two rubber spares block from top to bottom for vibrations are at first transmitted to A1 rubber spare on, then A1 rubber spare and A2 rubber spare are mutually supported, can cushion A1 rubber spare and come from the vibrations of equidirectional, realize shock-absorbing function.

Referring to fig. 3, the a2 rubber piece 512 is a conical boss-shaped member, and the groove of the a1 rubber piece 511 is a conical groove matching the conical boss; because diesel engine 320 and generator 310 are heavier, the area of contact of A2 rubber spare 512 and A1 rubber spare 511 has been increased through the above-mentioned setting, the effectual load capacity who promotes two rubber spares, it is further, the boss top of A2 rubber spare 512 is provided with cylindric boss, the recess bottom of A1 rubber spare 511 is provided with the draw-in groove that matches with cylindric boss, cylindric boss block is in the draw-in groove, make two rubber spare assemblies swift, the location is accurate, the structure is more stable.

Referring to fig. 3, the B damping mechanism 520 includes a movable base 521, a base 522 and a limiting assembly, the movable base 521 and the base 522 are arranged up and down, the lower connecting base 514 is installed on the movable base 521, an elastic member 523 is arranged between the movable base 521 and the base 522, the elastic direction of the elastic member 523 is the same as the plumb direction, and the limiting assembly is used for limiting the movement of the movable base 521 on the horizontal plane; the elastic member 523 is a spring, the upper end of the spring is fixed on the movable seat 521, and the lower end of the spring is fixed on the base 522; through the arrangement of the movable base 521, the base 522 and the elastic piece 523, the vibration from the direction of the plumb can be buffered, and through the arrangement of the limiting component, the movement of the movable base 521 on the horizontal plane can be restrained.

Referring to fig. 3, the limiting assembly includes an a limiting element 524 and a B limiting element 525, the a limiting element 524 is a groove-shaped member, a groove length direction of the a limiting element 524 is consistent with a plumb bob direction, a lower end of the a limiting element 524 is fixed on the base 522, an upper end of the a limiting element 524 is open, the B limiting element 525 is also a groove-shaped member, a groove length direction of the B limiting element 525 is consistent with a plumb bob direction, a lower end of the B limiting element 525 is open and is sleeved in the a limiting element 524, an upper end 525 of the B limiting element is fixed on the movable base 521, a cushion rubber pad 526 attached to an outer wall of the B limiting element 525 is installed on an inner wall of the a limiting; the A limiting piece 524 and the B limiting piece 525 are both formed by two vertically arranged plate pieces, the horizontal sections of the two plate pieces are semicircular, and concave surfaces of the two plate pieces are oppositely distributed at intervals; the cushion rubber pad 526 is composed of two outer rubber pads 526a and an interlayer pad 526b, the interlayer pad 526b is positioned between the two outer rubber pads 526a, and a cushion air cavity is arranged in the interlayer pad 526 b; the section of the interlayer cushion 526b vertical to the surfaces of the two outer-layer rubber cushions 526a is wavy, and a buffer air cavity is formed by an area enclosed between the interlayer cushion 526b and the two outer-layer rubber cushions 526 a; because the main vibrations of generating set 300 come from the plumb direction, other vibrations come from different directions, through the setting of cushion rubber pad 526 for the vibrations that come from different and plumb directions of B locating part 525 are by effectual buffering, cooperate the shock attenuation buffering of elastic component 523, effectual buffering effect that has promoted.

Referring to fig. 1, 5 and 6, the present invention further includes a heat dissipation mechanism 400, the heat dissipation mechanism 400 is disposed at the soundproof housing 200, and the heat dissipation mechanism 400 circulates water to the generator set 300 through the soundproof housing 200 through a water pipe 323; the generator set 300 comprises a diesel engine 320 and a generator 310 which are assembled together, wherein the diesel engine 310 drives a heat dissipation fan in the heat dissipation mechanism 400 to rotate through a transmission shaft 321, a bearing assembly 324 is arranged on the transmission shaft 321 in a position penetrating through the sound-proof housing 200, the bearing assembly 324 is installed in the sound-proof assembly 600, an exhaust pipe 322 of the diesel engine 320 penetrates through the sound-proof housing 200 and extends to the outside, and the exhaust pipe 322 is also connected with the sound-proof housing 200 through the sound-proof assembly 600; the noise insulation assembly 600 comprises a sleeve 610 with two open ends, the sleeve 610 is fixed on the noise insulation cover 200, the sleeve 610 is sleeved on the bearing assembly 324 or the exhaust pipe 322, the axial direction of the sleeve 610 is consistent with the axial direction of the transmission shaft 321 or the pipe length direction of the exhaust pipe 322, the inner wall of the sleeve 610 is provided with a rubber curtain 620 along the axial direction, and the rubber curtain 620 is used for closing the area between the inner wall of the sleeve 610 and the bearing assembly 324 or the exhaust pipe 322; the rubber partition curtains 620 are axially provided with two layers along the sleeve, the two layers of rubber partition curtains 620 are distributed at intervals, and noise reduction cotton fillers 630 are arranged between the two layers of rubber partition curtains 620; arrange heat dissipation mechanism 400 at sound-proof housing 200, be convenient for the heat dissipation, water pipe 323 is the hose, can not be with vibrations drive belt sound-proof housing 200 on, setting through sound insulation component 600, transmission shaft 321 and blast pipe 322 pass sound-proof housing 200 and can give sound insulation and seal and subduct the buffering with the two vibrations, avoid transmitting the noise that produces on sound-proof housing 200, double-deck rubber separates the setting of curtain 620 in sound insulation component 600, can realize the sound insulation function on the one hand, on the other hand can cushion transmission shaft 321 and blast pipe 322's the vibrations of transmitting on sound-proof housing 200, reduce the noise, at the setting of the cotton of making an uproar filler 630 of making an uproar that falls through between two-deck rubber separates the.

Referring to fig. 7, the soundproof cover 200 is composed of a metal outer layer 210, a soundproof interlayer 220 and a flame-retardant noise reduction layer 230, the soundproof interlayer 220 is a density board made of soundproof cotton, noise reduction protrusions 231 are provided on the surface of the flame-retardant noise reduction layer 230, and the flame-retardant noise reduction layer 230 is made of a mixture of gypsum, mineral wool, etc.; through the setting of metal outer layer 210, realize supporting protect function, realize the economic benefits and social benefits sound insulation function through the intermediate layer 220 that gives sound insulation and the layer 230 of making an uproar that falls with fire-retardant noise, give sound insulation effectually, through the protruding 231 of making an uproar that falls that the layer 230 of making an uproar that falls sets up on the surface of fire-retardant noise reduction, can effectively subduct noise echo propagation, subduct the noise, give sound insulation and fall.

The invention can effectively reduce the vibration of the generator set, thereby reducing the generation of noise, and can isolate the generator set, so that the noise is isolated in a closed space, thereby effectively realizing the purpose of noise reduction and simultaneously ensuring the heat dissipation effect of the heat dissipation mechanism;

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The utility model provides a vehicular low noise high efficiency generator which characterized in that: including base (100), be equipped with confined sound-proof housing (200) on base (100), arranged generating set (300) in sound-proof housing (200), generating set (300) are through on damper (500) installation base (100), damper (500) are used for subducing the vibrations of generating set (300) equidirectional.

2. The vehicle-mounted low-noise high-efficiency generator according to claim 1, wherein: damping mechanism (500) are including assembling A damping mechanism (510) and B damping mechanism (520) together, and A damping mechanism (510) and B damping mechanism (520) distribute from top to bottom, and A damping mechanism (510) upper end and generating set (300)'s stabilizer blade are connected, and B damping mechanism (520) fixed mounting is on base (100), and the vibrations of generating set (300) equidirectional are subductd in A damping mechanism (510) and B damping mechanism (520) cooperation.

3. A vehicle-mounted low-noise high-efficiency generator according to claim 2, wherein: a damper (510) includes A1 rubber spare (511) and A2 rubber spare (512), A1 rubber spare (511) and A2 rubber spare (512) distribute from top to bottom, A2 rubber spare (512) is upwards protruding, A1 rubber spare (511) downside is provided with the recess, protruding and groove matching, the protruding card is in the recess, A1 rubber spare (511) are fixed in last connecting seat (513), go up connecting seat (513) fixed mounting on the stabilizer blade, A2 rubber spare (512) fixed mounting is in connecting seat (514) down, install on B damper (520) connecting seat (514) down.

4. A vehicle-mounted low-noise high-efficiency generator according to claim 3, wherein: the A2 rubber piece (512) is a conical boss-shaped component, and the groove of the A1 rubber piece (511) is a conical groove matched with the conical boss.

5. A vehicle-mounted low-noise high-efficiency generator according to claim 2, wherein: b damper (520) are including movable seat (521) and base (522) and the spacing subassembly of arranging from top to bottom, and lower connecting seat (514) is installed on movable seat (521), is provided with elastic component (523) between movable seat (521) and base (522), and the elasticity direction and the plummet direction of elastic component (523) are unanimous, and spacing subassembly is used for retraining the motion of movable seat (521) on the horizontal plane.

6. The vehicle-mounted low-noise high-efficiency generator according to claim 5, wherein: the limiting assembly comprises a limiting piece A (524) and a limiting piece B (525), the limiting piece A (524) is a groove-shaped member, the groove length direction and the plumb direction of the limiting piece A (524) are consistent, the lower end of the limiting piece A (524) is fixed on the base (522), the upper end of the limiting piece A (524) is opened, the limiting piece B (525) is also a groove-shaped member, the groove length direction and the plumb direction of the limiting piece B (525) are consistent, the lower end of the limiting piece B (525) is opened and sleeved in the limiting piece A (524), the upper end of the limiting piece B (525) is fixed on the movable base (521), a cushion rubber pad (526) attached to the outer wall of the limiting piece B (525) is arranged on the inner wall of the limiting piece A (524), and the limiting piece B (525) is arranged on.

7. The vehicle-mounted low-noise high-efficiency generator according to claim 6, wherein: the buffer rubber pad (526) is composed of two outer rubber pads (526a) and an interlayer pad (526b), the interlayer pad (526b) is located between the two outer rubber pads (526a), and a buffer air cavity is formed in the interlayer pad (526 b).

8. The vehicle-mounted low-noise high-efficiency generator according to claim 1, wherein: the generator set further comprises a heat dissipation mechanism (400), the heat dissipation mechanism (400) is arranged on the sound-proof housing (200), and the heat dissipation mechanism (400) penetrates through the sound-proof housing (200) through a water pipe (323) to supply water to the generator set (300) in a circulating mode.

9. A vehicle-mounted low-noise high-efficiency generator according to claim 8, wherein: the generator set (300) comprises a diesel engine (320) and a generator (310) which are assembled together, the diesel engine (310) drives a heat dissipation fan in a heat dissipation mechanism (400) to rotate through a transmission shaft (321), a bearing assembly (324) is arranged on the transmission shaft (321) in a position penetrating through a sound insulation cover (200), the bearing assembly (324) is installed in a sound insulation assembly (600), an exhaust pipe (322) of the diesel engine (320) penetrates through the sound insulation cover (200) to extend to the outside, and the exhaust pipe (322) is also connected with the sound insulation cover (200) through the sound insulation assembly (600).

10. A vehicle-mounted low-noise high-efficiency generator according to claim 9, wherein: the noise insulation assembly (600) comprises a sleeve (610) with openings at two ends, the sleeve (610) is fixed on the noise insulation cover (200), the sleeve (610) is sleeved on a bearing assembly (324) or an exhaust pipe (322), the axial direction of the sleeve (610) is consistent with the axial direction of a transmission shaft (321) or the pipe length direction of the exhaust pipe (322), a rubber curtain spacer (620) is arranged on the inner wall of the sleeve (610) along the axial direction of the sleeve, and the rubber curtain spacer (620) is used for closing the area between the inner wall of the sleeve (610) and the bearing assembly (324) or the exhaust pipe (322).