A noise reduction device for a diesel generator set

Abstract

This utility model relates to the field of generator technology, specifically to a noise reduction device for a diesel generator set, including an outer shell for accommodating the diesel generator set and a first isolation plate and a second isolation plate welded and fixed inside the outer shell. The top of the outer shell is provided with an oil inlet, and the bottom end of the oil inlet is connected to an oil supply pipe whose side end is connected to the diesel engine of the diesel generator set. The inner wall of the outer shell is provided with a sound-absorbing layer, and the bottom of the inner wall of the outer shell is provided with a first shock-absorbing support for supporting the diesel engine of the diesel generator set, and the bottom of the inner wall of the outer shell is provided with a second shock-absorbing support for supporting the generator of the diesel generator set.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, specifically to a noise reduction device for diesel generator sets. Background Technology

[0002] A diesel generator is an independent power generation device that converts the chemical energy generated by burning diesel fuel into mechanical energy, and then further into electrical energy. It does not rely on the power grid and can generate electricity on its own as long as it is filled with diesel fuel. Therefore, it is often used as a backup power source, a mobile power source, or a primary power source in areas without a power grid. Its core consists of two parts: one is a diesel engine, which burns diesel fuel to drive the piston and generate rotational mechanical energy; the other is a generator, which uses the principle of electromagnetic induction to convert the rotational mechanical energy from the engine into electrical energy. It has the characteristics of fast start-up, easy fuel storage, relatively independent operation, and strong load-bearing capacity. It can directly start high-power motors and is widely used in various fields.

[0003] Although the existing technologies mentioned above can solve the corresponding technical problems, they still have certain drawbacks: during operation, the existing diesel generator components will generate huge vibrations and noise. When applied to places with high requirements for quietness, such as hospitals, residential areas, and data centers, this noise will seriously interfere with the quiet environment, thereby greatly reducing the applicability of the equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a noise reduction device for diesel generator sets that effectively reduces noise and is suitable for use in quiet environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a noise reduction device for a diesel generator set, comprising an outer shell for accommodating the diesel generator set and a first isolation plate and a second isolation plate welded and fixed inside the outer shell. The top of the outer shell is provided with an oil inlet, and the bottom end of the oil inlet is connected to an oil supply pipe whose side end is connected to the diesel engine of the diesel generator set. The inner wall of the outer shell is provided with a sound-absorbing layer, and the bottom of the inner wall of the outer shell is provided with a first shock-absorbing support for supporting the diesel engine of the diesel generator set, and the bottom of the inner wall of the outer shell is provided with a second shock-absorbing support for supporting the generator of the diesel generator set.

[0006] A further improvement is that the bottom surface of the outer casing is also provided with a base, the base is provided with an oil tank, the bottom end of the oil delivery pipe is connected to the oil tank, and the bottom end of the oil delivery pipe is also provided with a muffler.

[0007] A further improvement is that the first shock-absorbing strut includes a hollow support rod disposed on the bottom surface of the inner wall of the outer shell and a soft rubber pad fixedly installed on the top of the hollow support rod.

[0008] A further improvement is that the second shock-absorbing strut includes a solid rod disposed on the bottom surface of the inner wall of the outer shell and a silicone block fixedly installed on the top of the solid rod.

[0009] A further improvement is that the silencer includes an inlet fixedly connected to the bottom end of the oil pipeline, an output pipe fixedly connected to the bottom end of the inlet, and an output port fixedly connected to the end of the output pipe, wherein the output pipe is covered with a sound-absorbing sleeve.

[0010] A further improvement is that both ends of the sound-absorbing sleeve are equipped with fixing plates.

[0011] A further improvement is that the outer shell is composed of shock-absorbing plates, which include an outer plate, an inner plate, and shock-absorbing columns disposed between the inner plate and the outer plate. The shock-absorbing columns include rigid support blocks connected to one side of the outer plate and shock-absorbing blocks disposed at the end of the rigid support blocks and fixedly connected to one side of the inner plate.

[0012] A further improvement is that the shock-absorbing block has an integrally formed circular hollow groove.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: After this utility model is installed in a diesel generator set, when the diesel engine of the diesel generator set is started, the vibration generated by the diesel engine will be directly output to the first shock absorber. The soft rubber pad of the first shock absorber will absorb a large amount of vibration, and the hollow support rod can also undergo slight deformation to further absorb the vibration generated by the diesel engine during operation, thereby reducing the noise caused by the vibration of the diesel engine. At the same time, the silicone block of the second shock absorber absorbs the vibration generated by the generator rotation of the diesel generator set. Since the generator vibration amplitude is small and the levelness requirement is high, a silicone block with high hardness is used in conjunction with a solid rod to provide stable support, absorbing the noise generated by vibration while preventing the generator from tilting. The first and second isolation plates are used to divide the inner cavity of the outer shell into three parts. The three-part compartmentalized structure achieves acoustic isolation, avoids noise crosstalk and resonance amplification, and the sound-absorbing layer fully absorbs the noise generated by vibration, effectively reducing the decibel of noise generated by the diesel generator set during operation and improving the quietness during use. Attached Figure Description

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

[0015] Figure 1This is a front view structural schematic diagram of the noise reduction device of this utility model;

[0016] Figure 2 This is a front view cross-section structural diagram of the noise reduction device of this utility model equipped with a diesel generator set;

[0017] Figure 3 This is a structural schematic diagram of the front cross-section of the noise reduction device of this utility model;

[0018] Figure 4 This is a side view cross-section structural diagram of the silencer of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the front view cross-section of the shock-absorbing plate of this utility model. Detailed Implementation

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] See Figure 1-5As shown, the technical solution adopted in this specific embodiment is: a noise reduction device for a diesel generator set, including an outer casing 1 for accommodating the diesel generator set 6 and a first isolation plate 2 and a second isolation plate 3 welded and fixed inside the outer casing 1. Both the first isolation plate 2 and the second isolation plate 3 are made of steel plates with a thickness of 2mm to 5mm, and are sealed to the inner wall of the outer casing 1 through continuous fillet welds, thereby dividing the interior of the outer casing 1 into three independent chambers, corresponding to the diesel engine installation area, the generator installation area, and the auxiliary equipment area, respectively. An oil inlet 51 is provided at the top of the outer casing 1 for oil filling... The oil inlet 51 is a 20mm inner diameter metal interface, which is threaded into the top wall of the outer casing 1 and sealed with a gasket. The bottom of the oil inlet 51 is connected to a fuel line 52, whose side end connects to the diesel engine of the diesel generator set 6. The fuel line 52 is an 8mm inner diameter oil-resistant rubber hose, and its two ends are securely connected to the oil inlet 51 and the diesel engine's fuel inlet respectively by spring clamps. The inner wall of the outer casing 1 is provided with a sound-absorbing layer 111, which is a 30mm-50mm thick polyurethane sound-absorbing sponge coated with pressure-sensitive adhesive for direct adhesion. The sound-absorbing layer 111, fixed to the inner wall surface of the outer casing 1, has an opening rate of over 85%. A first damping strut 54 for supporting the diesel engine of the diesel generator set 6 is provided at the bottom of the inner wall of the outer casing 1. The first damping strut 54 includes a hollow support rod 541 disposed on the bottom surface of the inner wall of the outer casing 1 and a soft rubber pad 542 fixedly installed on the top of the hollow support rod 541. The hollow support rod 541 is made of Q235 steel pipe with an outer diameter of 30mm, an inner diameter of 20mm, and a height of 80mm to 120mm. Its bottom end is welded and fixed to the inner bottom surface of the outer casing 1. The rubber pad 542 is made of natural rubber with a Shore hardness of 30±5HA and a thickness of 15mm. It is fixed to the top of the hollow support rod 541 by vulcanization. The bottom of the inner wall of the outer shell 1 is provided with a second shock-absorbing support 71 for supporting the generator of the diesel generator set 6. The second shock-absorbing support 71 includes a solid rod 711 set on the bottom surface of the inner wall of the outer shell 1 and a silicone block 712 fixedly installed on the top of the solid rod 711. The solid rod 711 is a No. 45 steel cylinder with a diameter of 25mm and a height of 80mm to 120mm. Its bottom end is welded to the inner bottom surface of the outer shell 1.The silicone block 712 is made of high-temperature resistant silicone with a Shore hardness of 60±5HA and a thickness of 10mm. It is bonded and fixed to the top of the solid rod 711 with high-temperature resistant epoxy resin. After the equipment is placed on a flat surface and installed in the diesel generator set 6, the diesel engine of the diesel generator set 6 is started. Oil is injected into the oil supply pipe 52 through the oil inlet 51 and output to the diesel engine of the diesel generator set 6 to enable it to run. The vibration generated by the diesel engine will be directly transmitted to the first shock absorber strut 54. The soft rubber pad 542 of the first shock absorber strut 54 will absorb a large amount of vibration. At the same time, the hollow support rod 541 can also undergo slight deformation to further absorb the vibration generated by the diesel engine during operation, thereby reducing the vibration generated by the diesel engine. The noise generated is absorbed by the silicone block 712 of the second shock-absorbing support 71, which absorbs the vibration generated by the rotation of the generator of the diesel generator set 6. Since the generator vibration amplitude is small and the levelness requirement is high, a silicone block 712 with high hardness is used in conjunction with a solid rod 711 to stabilize and support it. This absorbs the noise generated by the vibration and prevents the generator from tilting. The first isolation plate 2 and the second isolation plate 3 are used to divide the inner cavity of the outer shell 1 into three parts. The three-part compartmentalized structure achieves acoustic isolation, avoids noise crosstalk and resonance amplification, and the sound-absorbing layer 111 is used to fully absorb the noise generated by the vibration, effectively reducing the noise decibels generated by the diesel generator set 6 during operation and improving the quietness during use.

[0022] The bottom of the outer casing 1 is also provided with a base 4, which is a rectangular frame structure welded from 40mm×40mm square steel. Adjustable rubber feet are provided at its four corners. An oil tank 41 is located inside the base 4. The oil tank 41 is a sealed stainless steel container with a volume of 50L. It has an oil filler port and an oil return port on the top, and a drain plug on the bottom. The bottom end of the oil supply pipe 52 is connected to the oil tank 41. The bottom end of the oil supply pipe 52 is connected to the oil outlet of the oil tank 41 and the oil return line of the diesel engine via a T-connector. An oil-resistant sealing ring is provided between the T-connector and the oil supply pipe 52. A muffler 53 is also provided at the bottom end of the oil supply pipe 52. The muffler 53 includes an inlet 531 fixedly connected to the bottom end of the oil supply pipe 52, an outlet pipe 533 fixedly connected to the bottom end of the inlet 531, and an outlet 532 fixedly connected to the end of the outlet pipe 533. The outlet pipe 533 is covered with sound-absorbing material. The sleeve 534, with both the inlet 531 and outlet 532 made of brass and an inner diameter of 8mm, is threaded to the oil pipe 52. The outlet pipe 533 is a copper pipe with a wall thickness of 1mm and a length of 80mm, with its two ends brazed to the inlet 531 and outlet 532 respectively. The sound-absorbing sleeve 534 has a double-layer structure, with an inner layer of glass fiber cotton and an outer layer of non-woven fabric with a thickness of 5mm, which is tightly fitted around the outlet pipe 533. When refueling, the oil can be stored in the oil tank 41 in the base 4, thereby improving the range. At the same time, during the process of oil being input, it will pass through the inlet 531, outlet pipe 533 and outlet 532. When passing through, the sound-absorbing sleeve 534 covering the outlet pipe 533 can absorb the vibration generated by the flow of oil, thereby avoiding additional noise and thus achieving a better noise reduction effect.

[0023] The sound-absorbing sleeve 534 is provided with fixing plates 535 at both ends, which makes it easier to install the sound-absorbing sleeve 534 and fix it inside the outer shell 1 by using the fixing plates 535, making the installation simpler and more convenient.

[0024] The outer shell 1 is composed of shock-absorbing plates, which include an outer plate 11, an inner plate 12, and shock-absorbing columns disposed between the inner plate 12 and the outer plate 11. The outer plate 11 and the inner plate 12 are both cold-rolled steel plates with a thickness of 1.5mm. They are arranged in parallel with a spacing of 20mm. The shock-absorbing columns include a rigid support block 13 connected to one side of the outer plate 11 and a shock-absorbing block 14 disposed at the end of the rigid support block 13 and fixedly connected to one side of the inner plate 12. The rigid support block 13 is a polyoxymethylene cylinder with a diameter of 10mm and a height of 12mm. Its bottom surface is bonded to the inner surface of the outer plate 11 with strong adhesive. The shock-absorbing block 14 is a thermoplastic polyurethane elastomer with a diameter of 15mm and a thickness of 8mm. Its center is integrally injection molded with the top of the rigid support block 13. The upper surface of the shock-absorbing block 14 is bonded to the inner surface of the inner plate 12 with epoxy resin adhesive. The shock-absorbing columns are arranged in an array on each plate of the outer shell 1, with a center-to-center distance of 50mm between adjacent shock-absorbing columns. When vibration is transmitted to the outer shell 1, it will first hit the inner plate 12, causing the gap between the inner plate 12 and the outer plate 12 to be squeezed by the vibration impact. This causes the shock-absorbing block 14 of the shock-absorbing column to be squeezed and deformed, thereby absorbing the impact and vibration, further weakening the transmission of noise and making the generated noise volume lower.

[0025] The shock-absorbing block 14 has an integrally formed circular hollow groove 15 with a diameter of 8mm. The hollow groove 15 is located at the center of the shock-absorbing block 14 and runs through the transverse direction of the shock-absorbing block 14. This makes it easier for the shock-absorbing block 14 to deform, thereby improving the absorption effect of vibration and impact.

[0026] In this embodiment, the diesel generator set 6 is an existing diesel generator, consisting of a diesel engine and a generator, which is prior art and will not be described in detail here. The diesel engine of the diesel generator set 6 is supported by four first damping struts 54, which are arranged in a rectangular shape and correspond to the four mounting corners of the engine. The bottom of the generator housing is supported by three second damping struts 71, which are arranged in a triangular shape to ensure horizontal stability. The diesel engine and generator are respectively fixedly connected to the pre-embedded nuts on the soft rubber pads 542 or silicone blocks 712 by bolts passing through the through holes on their bases. The front of the outer casing 1 is provided with an openable maintenance door. The inner wall of the maintenance door is also covered with a sound-absorbing layer 111, and the maintenance door is surrounded by sealing rubber strips to prevent noise leakage.

[0027] The working principle of this utility model is as follows: After placing the equipment on a flat surface and installing the diesel generator set 6, the diesel engine of the diesel generator set 6 is started. Oil is injected into the oil supply pipe 52 through the oil inlet 51 and supplied to the diesel engine of the diesel generator set 6 to enable its operation. The vibration generated by the diesel engine is directly transmitted to the first shock absorber strut 54. The soft rubber pad 542 of the first shock absorber strut 54 absorbs a large amount of vibration. Simultaneously, the hollow support rod 541 can also undergo slight deformation to further absorb the vibration generated by the diesel engine during operation, thereby reducing the noise caused by the vibration of the diesel engine. At the same time, the silicone block of the second shock absorber strut 71... The 712 absorbs the vibration generated by the rotation of the generator in the diesel generator set 6. Since the generator vibration amplitude is small and the levelness requirement is high, a high-hardness silicone block 712 is used in conjunction with a solid rod 711 to stabilize and support it. This absorbs the noise generated by the vibration and prevents the generator from tilting. The first isolation plate 2 and the second isolation plate 3 are used to divide the inner cavity of the outer shell 1 into three parts. The three-part compartmentalized structure achieves acoustic isolation, avoids noise crosstalk and resonance amplification, and the sound-absorbing layer 111 is used to fully absorb the noise generated by the vibration, effectively reducing the noise decibels generated by the diesel generator set 6 during operation and improving the quietness during use.

[0028] This utility model aims to protect the structure of the product. The model numbers of the components are not the focus of this utility model's protection, as they are common technology. Any component on the market that can achieve the functions described above can be used as an option. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A noise reduction device for a diesel generator set, characterized in that: The enclosure includes an outer shell (1) for housing the diesel generator set (6) and a first isolation plate (2) and a second isolation plate (3) welded and fixed inside the outer shell (1). The top of the outer shell (1) is provided with an oil inlet (51). The bottom of the oil inlet (51) is connected to an oil supply pipe (52) whose side end is connected to the diesel engine of the diesel generator set (6). The inner wall of the outer shell (1) is provided with a sound-absorbing layer (111). The bottom of the inner wall of the outer shell (1) is provided with a first shock-absorbing support (54) for supporting the diesel engine of the diesel generator set (6). The bottom of the inner wall of the outer shell (1) is provided with a second shock-absorbing support (71) for supporting the generator of the diesel generator set (6).

2. The noise reduction device for a diesel generator set according to claim 1, characterized in that: The bottom surface of the outer shell (1) is also provided with a base (4), and an oil tank (41) is provided inside the base (4). The bottom end of the oil pipe (52) is connected to the oil tank (41), and a muffler (53) is also provided at the bottom end of the oil pipe (52).

3. The noise reduction device for a diesel generator set according to claim 1, characterized in that: The first shock-absorbing support column (54) includes a hollow support rod (541) disposed on the bottom surface of the inner wall of the outer shell (1) and a soft rubber pad (542) fixedly installed on the top of the hollow support rod (541).

4. The noise reduction device for a diesel generator set according to claim 1, characterized in that: The second shock-absorbing support (71) includes a solid rod (711) disposed on the bottom surface of the inner wall of the outer shell (1) and a silicone block (712) fixedly installed on the top of the solid rod (711).

5. The noise reduction device for a diesel generator set according to claim 2, characterized in that: The muffler (53) includes an inlet (531) fixedly connected to the bottom end of the oil pipe (52), an outlet pipe (533) fixedly connected to the bottom end of the inlet (531), and an outlet (532) fixedly connected to the end of the outlet pipe (533). The outlet pipe (533) is covered with a sound-absorbing sleeve (534).

6. The noise reduction device for a diesel generator set according to claim 5, characterized in that: Both ends of the sound-absorbing sleeve (534) are provided with fixing plates (535).

7. The noise reduction device for a diesel generator set according to claim 1, characterized in that: The outer shell (1) is composed of shock-absorbing plates, which include an outer plate (11), an inner plate (12), and shock-absorbing columns disposed between the inner plate (12) and the outer plate (11). The shock-absorbing columns include a rigid support block (13) connected to one side of the outer plate (11) and a shock-absorbing block (14) disposed at the end of the rigid support block (13) and fixedly connected to one side of the inner plate (12).

8. The noise reduction device for a diesel generator set according to claim 7, characterized in that: The shock-absorbing block (14) has a circular hollow groove (15) integrally formed on it.

Images