Low-noise miniaturized mobile power supply vehicle

Abstract

The invention discloses a low-noise miniaturized mobile power van, which belongs to the technical field of power van, and comprises a chassis, a compartment body, a generator set arranged in the compartment body, an independent fuel tank, a cooling fan, a cable reel and a control system, the interior of the compartment is divided into a front cabin, a middle cabin and a rear cabin, the independent fuel tank is fixed to the bottom of the front cabin, the cooling fan and the generator set are sequentially assembled in the middle cabin, and the cable reel and the control system are arranged in the rear cabin. The generator set is formed by combining a high-rotating-speed engine and a permanent magnet generator, and a full-water-cooling heat dissipation system is adopted. A plurality of layers of noise reduction and sound absorption structures are arranged in the side walls of the compartment body; a noise reduction device is arranged in the compartment body and used for reducing exhaust noise and aerodynamic noise generated in the operation process of the generator set. And a turnover skylight is arranged at the top of the carriage body. The height of the whole vehicle is reduced to 2.2 m or below, noise at the position 1 m under the rated load state of the whole vehicle is controlled to be 70 dB or below, and meanwhile the advantages of being convenient to overhaul and excellent in sealing and rain-proof performance are achieved.

Description

Technical Field

[0001] This invention belongs to the field of power supply vehicle technology, specifically relating to a low-noise, miniaturized mobile power supply vehicle. Background Technology

[0002] With technological advancements, electricity customers have an increasingly strong demand for reliable power supply, and mobile power supply vehicles play a crucial role in emergency power supply and power outage repair. However, in old urban areas and rural towns with narrow lanes, and in buildings and hotels where power distribution rooms are often located in basements, conventional mobile power supply vehicles, due to their height exceeding 2.2 meters, face the dilemma of being unable to pass through or directly reach the work site. This often necessitates laying very long temporary cables to reach the power supply and repair areas, causing considerable inconvenience to power supply work in old urban areas, buildings, and other important venues, resulting in certain economic losses and impacts.

[0003] In response to the above problems, there is an increasing demand for miniaturized power vehicles that are low in height and have a compact and flexible overall size. However, the current miniaturized power vehicles generally have the following problems: (1) Due to the large size of the conventional generator set loaded, the overall height of the vehicle cannot be reduced to below 2.2 meters, making it impossible to enter and exit the basement for operation; (2) The small power generator set installed to control the overall height of the vehicle generally has a low output power, usually between 10-100kW, which cannot meet the needs of larger power loads; (3) In order to reduce the noise of the vehicle to below 70dB, the side walls of the vehicle compartment need to be filled with sound-absorbing materials with a thickness of not less than 20cm, resulting in the miniaturized power vehicle having no extra space to arrange noise reduction structures due to the limited space inside the compartment; at the same time, the single sound-absorbing material or random stacking of noise reduction materials is difficult to achieve balanced absorption of noise across the entire frequency band, especially the difficult-to-handle mid-low frequency band, resulting in a large noise of the vehicle during operation, causing noise pollution to the environment; (4) Due to miniaturization, the limited internal space of the compartment severely restricts the airflow path required for the generator set to dissipate heat, and poor heat dissipation leads to local overheating of the engine set, making it unable to operate; (5) The limited internal space of the compartment makes it inconvenient to maintain the unit and equipment inside the compartment.

[0004] Therefore, how to ensure multiple functions such as high power output, deep noise reduction, efficient heat dissipation and convenient maintenance while limiting the overall vehicle height to less than 2.2 meters is a technical problem that urgently needs to be solved for miniaturized mobile power supply vehicles. Summary of the Invention

[0005] In view of the problems existing in the miniaturized mobile power vehicles in terms of height, power, noise reduction, heat dissipation and maintenance, this invention proposes a low-noise miniaturized mobile power vehicle that has multiple functions such as low height, miniaturization, low noise operation and convenient maintenance, so as to meet the needs of emergency power supply and maintenance.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A low-noise, miniaturized mobile power vehicle includes a chassis, a compartment mounted on the chassis, and a generator set, an independent fuel tank, a cooling fan, a cable reel, and a control system disposed within the compartment. The compartment is divided into a front compartment, a middle compartment, and a rear compartment. The independent fuel tank is fixed to the bottom of the front compartment, the cooling fan and the generator set are sequentially disposed in the middle compartment, and the cable reel and the control system are disposed in the rear compartment.

[0008] The generator set consists of a high-speed engine and a permanent magnet generator, and is equipped with a full water-cooling heat dissipation system.

[0009] The side wall of the compartment is equipped with a multi-layer noise reduction and sound absorption structure;

[0010] The interior of the compartment is also equipped with a noise reduction device to reduce the exhaust noise generated by the generator set during operation, as well as the aerodynamic noise radiated through the air inlet and outlet of the compartment.

[0011] Furthermore, the noise reduction device includes: a muffler assembly consisting of a first-stage muffler and a second-stage muffler connected in series. The air inlet of the first-stage muffler is connected to the exhaust port of the generator set, and the exhaust port of the second-stage muffler leads to the outside of the enclosure. The first-stage muffler is arranged parallel to the upper side of the generator set, and the second-stage muffler is fixed laterally above the control system.

[0012] The air intake and exhaust sound insulation device includes: an air intake sound insulation device located at the air intake at the upper part of the rear compartment of the compartment; and an air exhaust sound insulation device fixed at the air outlet at the bottom of the front compartment of the compartment.

[0013] Furthermore, an air outlet guide device is provided at the air outlet to direct airflow obliquely upwards.

[0014] Furthermore, the air inlet sound insulation device and the air outlet sound insulation device are sound-absorbing and sound-insulating cover structures, and the sound-absorbing and sound-insulating cover structures are made of steel plates and high-density sound-absorbing materials.

[0015] Furthermore, the multi-layer noise reduction and sound absorption structure includes an outer wall panel layer, an air layer or vacuum layer, a porous plate layer, and a sound-absorbing material layer arranged sequentially from the outside to the inside.

[0016] Furthermore, the multi-layer noise reduction and sound absorption structure also includes a microporous plate disposed between the porous plate layer and the sound-absorbing material layer, and the pore size of the microporous plate is less than 1 mm and the perforation rate is less than 15%.

[0017] Furthermore, the top of the compartment is equipped with a flip-up sunroof, the opening area of ​​which is larger than the projected area of ​​the generator set on the horizontal plane.

[0018] The flip-up sunroof is a double-opening flip-up structure, consisting of a left sunroof and a right sunroof. The left and right sunroofs are connected to the top frame of the cabin via hinges and are equipped with hydraulic drive mechanisms. The hydraulic drive mechanisms include hydraulic cylinders connected to the left and right sunroofs respectively. Each hydraulic cylinder is connected to the internal frame of the cabin via its cylinder connecting seat. The extension and retraction of the cylinders are controlled by the hydraulic system to realize the flip-up action of the flip-up sunroof.

[0019] Furthermore, the joint interfaces between the flip-up sunroof and the body, and between the left sunroof and the right sunroof, are sealed using an inverted sealing structure. The inverted sealing structure includes a double-bubble sealing strip and two U-shaped groove plates respectively fixed on the frame on both sides of the joint interface. The two U-shaped groove plates are arranged opposite each other in an inverted manner, with the side wall of one U-shaped groove plate extending into the opening of the other U-shaped groove plate. The extended side wall and the opposite frame form a pressing space, and the double-bubble sealing strip is pressed and fixed in the pressing space to achieve a seal.

[0020] Furthermore, the frame of the flip-up sunroof is filled with the aforementioned multi-layer noise reduction and sound absorption structure.

[0021] Furthermore, maintenance doors are arranged on both sides of the compartment corresponding to the generator set, toolboxes are arranged on the lower part of both sides of the rear compartment, a power feedout quick-connect interface is arranged on one side, and a grounding device is arranged on the other side.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention achieves miniaturization of the generator set by combining a high-speed engine with a permanent magnet generator, reducing the overall vehicle height to below 2.2 meters, thus accommodating vehicles operating in confined spaces such as basements. Furthermore, the water-cooling system enhances the generator set's cooling efficiency, mitigating the risk of uneven heat dissipation leading to high-temperature alarms and shutdowns, and ultimately, power outages, inherent in miniaturized emergency power supply vehicles.

[0024] This invention effectively controls the noise level at 1 meter under the rated load of the vehicle to below 70dB by combining a multi-layer noise reduction and sound absorption structure, a sound-absorbing combination device, and an air intake and exhaust sound insulation device, thus greatly reducing noise pollution during operation.

[0025] This invention solves the problem of inconvenient maintenance of units and equipment inside miniaturized power vehicles due to limited space within the vehicle compartment by designing a large-area automatic flip-up sunroof. The sunroof adopts an inverted sealing structure and double bubble sealing strips, as well as a multi-layer noise reduction and sound absorption structure within the sunroof frame. While enabling convenient maintenance, it ensures excellent soundproofing and sealing effects, and avoids premature aging of the sealing strips due to long-term pressure, thereby improving the environmental adaptability and long-term reliability of the entire vehicle. Attached Figure Description

[0026] Figure 1 A front view of the overall structure of the miniaturized mobile power supply vehicle provided by the present invention;

[0027] Figure 2 For the present invention Figure 1 A top view of the mobile power supply vehicle shown;

[0028] Figure 3 This is a schematic diagram of the multi-layer noise reduction and sound absorption structure of the side wall of the compartment of the present invention;

[0029] Figure 4 This is a schematic diagram of the flip-up sunroof structure of the present invention;

[0030] Figure 5 This is a partially enlarged schematic diagram of the flip-up sunroof sealing structure of the present invention;

[0031] Explanation of the labels in the diagram:

[0032] 1-Chassis; 2-Body; 21-Body sidewall; 22-Multi-layer noise reduction and sound absorption structure; 221-Sound-absorbing material layer; 222-Perforated board layer; 223-Air layer (vacuum layer); 224-Exterior wall panel layer; 23-Flip-out sunroof; 231-Hinge; 232-Left side sunroof; 233-Right side sunroof; 234-Hydraulic cylinder; 235-Cylinder connecting seat; 236-Double bubble sealing strip; 237-U-shaped groove plate; 3-Inlet and outlet sound insulation device; 31-Outlet air guide device; 32-Outlet sound insulation device; 33-Inlet sound insulation device; 4-Cooling fan; 5-Generator set; 51-Water-cooled heat dissipation system; 52-High-speed engine; 53-Permanent magnet generator; 6-Muffler assembly; 61-Class I muffler; 62-Class II muffler; 7-Control system; 8-Cable reel; 9-Independent fuel tank. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 5 As shown, a low-noise miniaturized mobile power vehicle includes a chassis 1, a compartment 2 mounted on the chassis 1, and a generator set 5, an independent fuel tank 9, a cooling fan 4, a cable reel 8, and a control system 7 disposed within the compartment 2; the compartment 2 is divided into a front compartment, a middle compartment, and a rear compartment, the independent fuel tank 9 is fixed to the bottom of the front compartment, the cooling fan 4 and the generator set 5 are sequentially arranged in the middle compartment, and the cable reel 8 and the control system 7 are arranged in the rear compartment;

[0035] The generator set 5 is composed of a high-speed engine 52 and a permanent magnet generator 53, and is equipped with a full water-cooled heat dissipation system 51.

[0036] The side wall 21 of the compartment is provided with a multi-layer noise reduction and sound absorption structure 22;

[0037] The interior of the compartment is also equipped with a noise reduction device to reduce the exhaust noise generated during the operation of the generator set, as well as the aerodynamic noise radiated through the air inlet and outlet of the compartment.

[0038] Specifically, the noise reduction device includes: a muffler assembly 6, which consists of a first-stage muffler 61 and a second-stage muffler 62 connected in series. The air inlet of the first-stage muffler 61 is connected to the turbocharger exhaust port of the generator set 5, and the exhaust port of the second-stage muffler 62 is connected to the exhaust pipe, which leads directly to the outside of the enclosure. The first-stage muffler 61 is parallel to the generator set 5 and fixed to the upper side of the generator set 5, while the second-stage muffler 62 is fixed laterally above the control system 7. The layout of the two-stage mufflers makes full use of the upper space inside the enclosure 2, and their series design can effectively reduce the exhaust noise of the unit.

[0039] The ventilation system adopts a design of air intake at the rear top of the compartment 2 and air outlet at the front obliquely upward to reduce the impact on the noise test points on the side of the compartment 2. The air intake and exhaust sound insulation devices include: an air intake sound insulation device 33 installed at the air intake at the upper part of the rear compartment of the compartment 2, and an air outlet sound insulation device 32 fixed at the bottom of the front compartment of the compartment 2 and located in front of the heat sink of the cooling fan 4. In order to further guide noise and hot air to radiate upward to the vehicle body, an air outlet guide device 31 with an obliquely upward opening is also provided at the front of the air outlet sound insulation device 32 and at the top of the independent fuel tank 9. The air intake sound insulation device 33 and the air outlet sound insulation device 32 are sound-absorbing and sound-insulating cover structures, and the sound-absorbing and sound-insulating cover structures are made of steel plates and high-density sound-absorbing materials, which can effectively reduce the aerodynamic noise radiated by the generator set to the air intake and air outlet.

[0040] like Figure 3 As shown, the compartment 2 is composed of compartment side walls 21. The side wall 21 has a multi-layer noise reduction and sound absorption structure 22, which includes an outer wall panel layer 224, an air layer or vacuum layer 223, a porous plate layer 222, and a sound-absorbing material layer 221 arranged sequentially from the outside to the inside. The outer wall panel layer 224 is made of steel plate with high surface density. The air layer or vacuum layer 223 can effectively target low-frequency standing waves and solve the problem of weak absorption capacity of traditional filling materials for mid- and low-frequency noise. The porous plate layer 222 and the sound-absorbing material layer 221 work together to effectively reduce mid- and high-frequency noise in the generator set.

[0041] In a preferred embodiment, a microporous plate can be added between the porous plate layer and the sound-absorbing material layer, and the pore size of the microporous plate is less than 1 mm and the perforation rate is less than 15%, which further enhances the absorption capacity of low-frequency noise.

[0042] By designing a multi-layered noise reduction and sound absorption structure, the generator set's broadband noise is absorbed in a balanced and efficient manner, rather than simply increasing the thickness of the filling sound-absorbing material. This achieves the optimal noise reduction effect within the limited wall thickness of the enclosure.

[0043] like Figures 4 to 5 As shown, in order to fundamentally solve the problem of inconvenient maintenance of internal equipment due to limited internal space in miniaturized mobile power vehicles, a flip-up sunroof 23 is provided on the top of the body 2, and the opening area of ​​the sunroof is larger than the projected area of ​​the generator set 5 on the horizontal plane; the flip-up sunroof 23 is a double-opening flip-up structure, divided into a left sunroof 232 and a right sunroof 233; the left sunroof 232 and the right sunroof 233 are respectively connected to the top frame of the body 2 through hinges 231, and a hydraulic drive mechanism is provided on the inner side of each sunroof to drive it to flip.

[0044] Specifically, the hydraulic drive mechanism includes hydraulic cylinders 234 connected to the left sunroof 232 and the right sunroof 233 respectively. Each hydraulic cylinder is connected to the internal frame of the compartment 2 through its cylinder connecting seat 235. The extension and retraction of the cylinders are controlled by the hydraulic system to realize the flipping action of the flip-type sunroof, providing operating space for the hoisting and maintenance of large equipment such as generator set 5 and muffler assembly 6 inside the compartment.

[0045] To ensure the sealing, rainproofing, and sound insulation performance of the sunroof when closed, an inverted sealing structure is used to seal the gaps between the flip-up sunroof 23 and the body 2, and between the left sunroof 232 and the right sunroof 233. The inverted sealing structure includes a double-bubble sealing strip 236 and two U-shaped groove plates 237 respectively fixed on the frame on both sides of the joint interface. The two U-shaped groove plates are arranged opposite each other in an inverted manner, with the side wall of one U-shaped groove plate extending into the opening of the other U-shaped groove plate. The extended side wall forms a pressing space with the opposite frame, and the double-bubble sealing strip is pressed and fixed in the pressing space to achieve a seal. This side-force sealing method avoids permanent compression deformation and premature aging of the sealing strip due to long-term pressure from the sunroof, resulting in high sealing reliability and excellent waterproof performance.

[0046] The frame of the flip-up sunroof 23 is also filled with the same multi-layer noise reduction and sound absorption structure 22 as the side wall 21 of the compartment, which further enhances the sound insulation and sound absorption effect.

[0047] Specifically, maintenance doors are arranged on both sides of the compartment 2 corresponding to the generator set 5, toolboxes are arranged on the lower part of both sides of the rear compartment of the compartment 2, a power feedout quick-connect interface is arranged on one side, and a grounding device is arranged on the other side.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and concept of the present invention, should be included within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the scope of the claims.

Claims

1. A low-noise, miniaturized mobile power supply vehicle, comprising a chassis, a compartment mounted on the chassis, and a generator set, an independent fuel tank, a cooling fan, a cable reel, and a control system disposed within the compartment; characterized in that, The compartment is divided into a front compartment, a middle compartment, and a rear compartment. An independent fuel tank is fixed at the bottom of the front compartment, a cooling fan and a generator set are arranged in the middle compartment, and a cable reel and a control system are arranged in the rear compartment. The generator set consists of a high-speed engine and a permanent magnet generator, and is equipped with a full water-cooling heat dissipation system. The side wall of the compartment is equipped with a multi-layer noise reduction and sound absorption structure; The interior of the compartment is also equipped with a noise reduction device to reduce the exhaust noise generated during the operation of the generator set, as well as the aerodynamic noise radiated through the air inlet and outlet of the compartment.

2. The low-noise miniaturized mobile power supply vehicle according to claim 1, characterized in that, The noise reduction device includes: a muffler assembly consisting of a first-stage muffler and a second-stage muffler connected in series. The air inlet of the first-stage muffler is connected to the exhaust port of the generator set, and the exhaust port of the second-stage muffler leads to the outside of the enclosure. The first-stage muffler is arranged parallel to the upper side of the generator set, and the second-stage muffler is fixed laterally above the control system. The air intake and exhaust sound insulation device includes: an air intake sound insulation device located at the air intake at the upper part of the rear compartment of the compartment; and an air exhaust sound insulation device fixed at the air outlet at the bottom of the front compartment of the compartment.

3. The low-noise miniaturized mobile power supply vehicle according to claim 2, characterized in that, An air outlet guide device is provided at the air outlet to direct the airflow upwards at an angle.

4. The low-noise miniaturized mobile power supply vehicle according to claim 2, characterized in that, The air inlet sound insulation device and the air outlet sound insulation device are sound-absorbing and sound-insulating cover structures, and the sound-absorbing and sound-insulating cover structures are made of steel plates and high-density sound-absorbing materials.

5. The low-noise miniaturized mobile power supply vehicle according to claim 1, characterized in that, The multi-layer noise reduction and sound absorption structure includes, from the outside to the inside, an outer wall panel layer, an air layer or vacuum layer, a porous panel layer, and a sound-absorbing material layer.

6. A low-noise, miniaturized mobile power supply vehicle according to claim 5, characterized in that, The multi-layer noise reduction and sound absorption structure also includes a microporous plate disposed between the porous plate layer and the sound-absorbing material layer.

7. The low-noise miniaturized mobile power supply vehicle according to claim 1, characterized in that, The top of the compartment is equipped with a flip-up sunroof, the opening area of ​​which is larger than the projected area of ​​the generator set on the horizontal plane. The flip-up sunroof is a double-opening flip-up structure, consisting of a left sunroof and a right sunroof. The left and right sunroofs are connected to the top frame of the compartment via hinges and are equipped with hydraulic drive mechanisms. The hydraulic drive mechanisms include hydraulic cylinders connected to the left and right sunroofs respectively, and each hydraulic cylinder is connected to the internal frame of the compartment via its cylinder connecting seat.

8. A low-noise, miniaturized mobile power supply vehicle according to claim 7, characterized in that, The joint interfaces between the flip-up sunroof and the body, and between the left sunroof and the right sunroof, are sealed using an inverted sealing structure. The inverted sealing structure includes a double-bubble sealing strip and two U-shaped groove plates respectively fixed on the frame on both sides of the contact interface. The two U-shaped groove plates are arranged opposite each other in an inverted manner, with the side wall of one U-shaped groove plate extending into the opening of the other U-shaped groove plate. The extended side wall and the opposite frame form a pressing space, and the double-bubble sealing strip is pressed and fixed in the pressing space to achieve a seal.

9. A low-noise, miniaturized mobile power supply vehicle according to any one of claims 7 or 8, characterized in that, The frame of the flip-up sunroof is filled with the aforementioned multi-layered noise reduction and sound absorption structure.

10. A low-noise, miniaturized mobile power supply vehicle according to claim 1, characterized in that, Maintenance doors are arranged on both sides of the compartment corresponding to the generator set. Tool boxes are arranged on the lower part of both sides of the rear compartment. A power feedout quick-connect interface is arranged on one side, and a grounding device is arranged on the other side.

Images