Silent diesel generating set

Abstract

The utility model discloses a silent diesel generating set which structurally comprises a generator body arranged in a box type shell, the generator body is wrapped by a layer of sound insulation cover, an air port assembly is arranged at the position of an air inlet and an air outlet in the shell, and the air port assembly comprises a cover opening seat and a plurality of drainage plates arranged in the cover opening seat. The drainage plates are divided into an outer layer and an inner layer in the cover opening seat, the multiple drainage plates are arranged on the inner layer and the outer layer at intervals, gaps between the drainage plates form airflow channels, and the included angle of the airflow channels between the inner layer and the outer layer is smaller than 180 degrees. By arranging the inner drainage plate and the outer drainage plate and enabling the drainage plates to be inclined, a bent airflow channel is formed, sound waves are subjected to multiple hindrance and interference at the air inlet and the air outlet, sound transmission is effectively reduced, a sound absorption pad is arranged in the airflow channel, and the overall noise reduction effect is further improved under the condition that it is guaranteed that airflow enters and exits.

Description

Technical Field

[0001] The utility model relates to the field of generators, in particular to a silent diesel generator set. Background Art

[0002] An ordinary diesel generator set mainly consists of three parts: the diesel engine, the generator and the control system. The diesel engine is responsible for fuel combustion and driving the generator rotor to rotate; the generator converts the power output of the diesel engine into alternating current with a certain voltage and frequency; the control system ensures the automatic start and stop and safe operation of the generator set.

[0003] The existing silent diesel generator set is covered with a box-type shell outside the generator set, and is wrapped with a soundproof cover formed by multiple layers of sound-absorbing materials, so as to reduce the sound during its use and meet the noise restriction requirements of most environments. However, when in use, although the soundproof cover inside the box can effectively reduce the noise, it will also have a certain impact on the heat dissipation performance of the generator set. In the prior art, the air inlet and outlet are directly opened in the heat dissipation area, which makes the sound insulation of the soundproof cover have a direct gap, affecting the overall noise reduction effect. Utility Model Content

[0004] In view of the above problems, the utility model provides a silent diesel generator set, whose structure includes a generator body installed in a box-type casing, a sound insulation cover wrapped from the outside of the generator body to the inside of the casing, and a fan for heat dissipation is provided on the generator body, wherein the casing is provided with air inlets and outlets and an air outlet assembly is provided at the air inlets and outlets, and the air outlet assembly includes a hood seat and a plurality of guide plates installed in the hood seat; the guide plates are divided into two layers in the hood seat and the outer layer is close to the outer side of the casing and the inner layer is close to the inner side, and the plurality of guide plates are arranged at intervals on the inner layer and the outer layer; there are gaps between the guide plates and the gaps form an air flow channel, and the guiding direction on the horizontal plane of the air flow channel has an angle between the inner layer and the outer layer and the angle is less than one hundred and eighty degrees.

[0005] As a further feature of the utility model, the relationship between the two guide plates close to each other between the inner layer and the outer layer is set to be facing each other, and the relationship between the two guide plates close to each other in the same layer is set to be adjacent; the inner end connection line of the two guide plates facing each other is located between the outer end connection line of the two guide plates facing each other on the back and the inner end connection line of the two guide plates.

[0006] As a further feature of the utility model, the inner side of the guide plate is hingedly connected to the hood seat, and the swing axis of the guide plate that swings through the hinge is parallel to the length direction of the guide plate; sound-absorbing pads are provided between the guide plates, and the sound-absorbing pads are located in the air flow channel formed by the gaps between the guide plates.

[0007] As a further feature of the utility model, a blocking piece is provided between the back side of the guide plate where no sound absorbing pad is provided and the hood seat, the blocking piece is elastic and one end of the blocking piece is fixed on the hood seat.

[0008] As a further feature of the utility model, buckles are provided at the top and bottom ends of the guide plate, and the cover mouth seat is provided with buckle grooves on the movement path of the buckles, and the plurality of guide plates that are swung close to each other are fixed to the cover mouth seat by the buckles.

[0009] As a further feature of the utility model, the sound absorbing pad is detachably mounted on the drainage plate by gluing or Velcro.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model provides an air outlet assembly at the air inlet and outlet, and sets two sets of inner and outer guide plates and tilts them relative to each other, thereby forming a bent air flow channel, so that sound waves are subject to multiple obstacles and interferences at the air inlet and outlet, effectively reducing the transmission of sound, and providing a sound-absorbing pad in the air flow channel. While ensuring the air flow in and out, the sound absorption effect is further increased, thereby improving the overall noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of a silent diesel generator set.

[0013] Figure 2 The utility model is a three-dimensional structural schematic diagram of the sound insulation cover installed on the shell.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the sound insulation cover of the utility model in a top view.

[0015] Figure 4 It is a three-dimensional schematic diagram of the partial structure of the sound insulation cover of the utility model.

[0016] In the figure: 1. Generator body; 2. Casing; 3. Soundproof cover; 4. Air outlet assembly;

[0017] 41. hood seat; 42. drainage plate; 43. sound-absorbing pad; 44. buckle; 45. plugging piece; 41a. buckle groove;

[0018] α, a line connecting the outer ends of two opposite guide plates 42; β, a line connecting the inner ends of two opposite guide plates 42. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] Examples, such as Figure 1-Figure 4 As shown: The utility model provides a silent diesel generator set, the structure of which includes a diesel generator body 1 installed in a box-type shell 2, a soundproof cover 3 formed of multiple layers of sound-absorbing materials is wrapped from the outside of the generator body 1 to the inside of the shell 2, and a fan for heat dissipation is provided on the generator body 1. Usually, this fan has a fixed direction, and the front and rear of this direction in the shell 2 are air inlets and outlets. The fan drives the air flow to exchange airflow between the inside and outside of the shell 2, so that the airflow takes away the heat generated by the internal generator body 1;

[0021] Among them, an air outlet assembly 4 is provided at the air inlet and outlet of the shell 2, and the air outlet assembly 4 includes a hood seat 41 and a plurality of guide plates 42 installed in the hood seat 41. Specifically, the guide plates 42 are divided into two layers in the hood seat 41, and the outer layer is close to the outer side of the shell 2 and the inner layer is close to the inner side. The plurality of guide plates 42 are arranged at intervals on the inner layer and the outer layer, and an air flow channel is formed by the gaps between the guide plates 42. The guiding direction on the horizontal plane of the air flow channel is set to have an angle between the inner layer and the outer layer, and the angle is less than one hundred and eighty degrees, thereby increasing the length and complexity of the air flow channel, so that the sound waves are more blocked and interfered when passing through, thereby reducing the transmission of sound;

[0022] Moreover, the inner side of the guide plate 42 is hingedly connected to the hood seat 41, and the swing axis of the guide plate 42 that swings through the hinge is parallel to the length direction of the guide plate 42, and a sound-absorbing pad 43 is provided between the guide plates 42, and the sound-absorbing pad 43 is located in the air flow channel formed by the gap between the guide plates 42, thereby further achieving a sound-absorbing effect. It can be seen that the sound-absorbing pad 43 is made of a sound-absorbing material. In this embodiment, the sound-absorbing pad 43 is made of a porous loose material or has particles that are difficult to be squeezed and deformed, such as a conical protrusion or a spherical protrusion, so that when it is against the back of the guide plate 42, a gap can be left, thereby maintaining airflow in and out at the air inlet and outlet;

[0023] And, more specifically, the relationship between two guide plates 42 close to each other between the inner layer and the outer layer is set to face each other, and the relationship between two guide plates 42 close to each other in the same layer is set to be adjacent. Subsequently, the two guide plates 42 facing each other are set as a group, and the inner end connection line of the two guide plates 42 facing each other is marked as β, and the outer end connection line of the two guide plates 42 facing each other is marked as α. Then, it is set that: the inner end connection line of the two guide plates 42 facing each other is located between the outer end connection line of the two guide plates 42 facing each other on the back and the inner end connection line of the two guide plates 42, that is, the former group β is located between α and β of the latter group, thereby limiting the length of the guide plates 42 and the spacing between the guide plates 42, as well as limiting the expansion angle between the guide plates 42, so that those skilled in the art can make settings that are more suitable for the usage on this basis.

[0024] Since the guide plates 42 are all inclined to one side, a blocking piece 45 is provided between the back side of the guide plate 42 where no sound-absorbing pad 43 is provided and the hood seat 41. The blocking piece 45 is elastic and one end of the blocking piece 45 is fixed to the hood seat 41. It can be seen that the blocking piece 45 is made of sound-absorbing material. In order to fix the guide plates 42 after the inclination, buckles 44 are provided at the top and bottom ends of the guide plates 42, and the hood seat 41 is provided with buckle grooves 41a on the movement path of the buckles 44. The multiple guide plates 42 that swing close to each other are fixed to the hood seat 41 through the buckles 44.

[0025] In this embodiment, the sound-absorbing pad 43 is detachably mounted on the guide plate 42 by gluing or Velcro. When in use, the inner and outer guide plates 42 on the hood seat 41 are both opened in the direction of their expansion, and then the sound-absorbing pad 43 is mounted on the guide plate 42. Then, the guide plate 42 is swung toward the side where the sound-absorbing pad 43 is provided, so that the buckles 44 at both ends of the guide plate 42 are fixed to the buckle grooves 41a of the hood seat 41 to fix the guide plate 42, and the sound-absorbing pad 43 is pressed against the back of the guide plate 42 with gaps or loose holes left, so as to adjust the air outlet group of the air inlet and outlet. After the sound absorbing pads 43 are installed on all the parts 4, the generator body 1 can be started. When the sound waves generated by the generator body 1 encounter the curved channel formed by the guide plate 42, they need to propagate along a tortuous path, which will increase the propagation time and path length of the sound waves in the channel. At the same time, the corners and turning points in the channel will also cause the sound waves to reflect and refract, further reducing the sound transmission efficiency. In addition, the sound absorption of the sound absorbing pads 43, these factors work together to reduce the noise leaking from the air inlets and outlets while maintaining the air flow in and out of the air inlets and outlets.

[0026] When the sound absorbing pad 43 is subsequently clogged or hardened due to dust or aging, resulting in a decrease in the sound absorption effect, the drainage plate 42 can be unfolded to remove the sound absorbing pad 43 and replace it, thereby ensuring the overall low-pitched and silent operation of the generator body 1.

[0027] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A silent diesel generator set, comprising a generator body installed in a box-type housing, a soundproof cover wrapped from the outside of the generator body to the inside of the housing, and a fan for heat dissipation is provided on the generator body, characterized in that: The shell is provided with an air inlet and an air outlet, and an air outlet assembly is provided at the air inlet and the air outlet, and the air outlet assembly includes a hood seat and a plurality of guide plates installed in the hood seat; The guide plates are divided into two layers in the mask mouth seat, and the one close to the outer side of the shell is the outer layer and the one close to the inner side is the inner layer. The plurality of guide plates are arranged at intervals on the inner layer and the outer layer. There are gaps between the guide plates and the gaps form an airflow channel. The guiding direction of the airflow channel on a horizontal plane has an angle between the inner layer and the outer layer and the angle is less than one hundred and eighty degrees.

2. A silent diesel generator set according to claim 1, characterized in that: The relationship between the two guide plates close to each other in the inner layer and the outer layer is set to be facing each other, and the relationship between the two guide plates close to each other in the same layer is set to be adjacent; The inner end connection line of the two opposite guide plates is located between the outer end connection line of the two opposite guide plates at the back and the inner end connection line of the two guide plates.

3. A silent diesel generator set according to claim 2, characterized in that: The inner side of the guide plate is hingedly connected to the cover mouth seat, and the swing axis of the guide plate that swings through the hinge is parallel to the length direction of the guide plate; A sound absorbing pad is arranged between the guide plates, and the sound absorbing pad is located in the air flow channel formed by the gap between the guide plates.

4. A silent diesel generator set according to claim 3, characterized in that: A blocking piece is provided between the back side of the guide plate where no sound absorbing pad is provided and the cover mouth seat. The blocking piece is elastic and one end of the blocking piece is fixed on the cover mouth seat.

5. A silent diesel generator set according to claim 3, characterized in that: Buckles are provided at the top and bottom of the guide plate, and buckle grooves are provided on the movement path of the buckles on the cover mouth seat. The plurality of guide plates that are swung close to each other are fixed to the cover mouth seat through the buckles.

6. A silent diesel generator set according to claim 3, characterized in that: The sound absorbing pad can be detachably mounted on the drainage plate by gluing or Velcro.

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