CN202348426U - A super-silent diesel generating set - Google Patents

Abstract

The utility model relates to an ultra-quiet diesel generator set. The mechanical properties, electrical properties, operational performance, reliability, daily maintenance and service life of the unit reach or approach the international advanced level; the unit reduces noise pollution to the environment and has a simple structure. , scientific and reasonable, low investment cost, easy to operate, and high operating efficiency of unit equipment. The air intake channel composed of the body's silent cover, louvers and air intake noise reduction box, the exhaust air channel formed by the exhaust noise reduction box and ventilation holes, and the muffler constitute the soundproof structure of the ultra-quiet diesel generator set; the noise reduction box is composed of parallel distribution The box body is composed of 6 parallel-arranged silencing sheets that divide the air intake noise reduction box into 7 parts, and the internal structure of the exhaust noise reduction box is composed of 7 silencing sheets that are arranged in parallel and staggered from each other. The front and rear ends of the muffler are trapezoidal in shape, and the noise reduction box effectively absorbs the noise generated by the air flow and the noise of the unit radiates outward, achieving a good soundproof effect.

Description

An ultra-quiet diesel generator set

technical field

The utility model relates to the technical field of noise control equipment for internal combustion engine power stations, in particular to an ultra-quiet diesel generator set. the

Background technique

In recent years, there have been many ultra-quiet units assembled in China. Due to the lack of reliable technical guarantee, the units have been damaged, and their service life and power output have been greatly reduced. For this reason, the state attaches great importance to the development of noise control equipment for engine units, and has listed the noise control equipment for internal combustion engine power plants as the fourth item of noise control equipment in the "Catalogue of Environmental Protection Industry Equipment (Products) Encouraged by the State" (2010 Edition). In this context, the applicant has developed a super-quiet diesel generator set by using his professional vision and expertise in the spirit of research, innovation and excellence. the

Contents of the invention

The purpose of the utility model is to provide an ultra-quiet diesel generator set that is energy-saving, environmentally friendly, lightweight, miniaturized, and elegant in appearance. the

In order to achieve the above object, the utility model adopts the following technical solutions:

An ultra-quiet diesel generator set includes four parts: an engine, a generator, a generator set controller and a sound-proof structure.

The sound-proof structure of the unit is composed of four parts: the sound-proof cover of the body, the air inlet channel, the exhaust channel and the muffler. The sound-proof cover of the body is made of a steel plate with adhesive film and sound-absorbing cotton with a thickness of 35mm. It consists of a noise reduction box, the exhaust channel is composed of an exhaust vent and a noise reduction box, and the exhaust muffler is composed of an impedance plus sound-absorbing type two-stage composite muffler. the

The noise reduction box is a box body composed of parallel distributed noise reduction sheets. The 6 parallel arranged noise reduction sheets divide the air intake noise reduction box into 7 parts on average. It is composed of staggered sound-absorbing sheets, and both ends of the sound-absorbing sheets are trapezoidal in shape. the

The intelligent controller of the ultra-quiet diesel generator set controls the engine speed, oil pressure, water temperature, DC power supply voltage and running time. The automatic control of the unit also includes multi-directional fault protection functions, namely engine overspeed, underspeed, low oil Monitoring functions for signal loss, start failure, emergency shutdown, charging failure and alarm shutdown etc. the

The beneficial effect of the utility model is that the mechanical performance, electrical performance, operational performance, reliability, daily maintenance and service life of the ultra-quiet diesel generator set reach or approach the international advanced level; the noise pollution of the unit to the environment is reduced, and the structure Simple, scientific and reasonable, low investment cost, easy to operate, and high operating efficiency of unit equipment. the

Description of drawings

Fig. 1 is the front view of the structure diagram of the utility model. the

Fig. 2 is a top view of the structure diagram of the utility model. the

Detailed ways

The utility model is further described below in conjunction with accompanying drawing:

Referring to Fig. 1 and Fig. 2, the utility model provides an ultra-quiet diesel generator set, which adopts high-efficiency sound-absorbing materials and industrially produced noise-reducing and muffler devices with advanced production technology for the intake, exhaust and exhaust channels. The system has been subjected to noise reduction treatment, and mainly includes four major parts, including an engine (10), a generator (11), a generator set controller (12) and a sound-proof structure (13).

The sound-proof structure (13) of the unit includes four parts such as a body noise cover (14), an air inlet channel (17), an exhaust channel (20) and a muffler (21). The sound-absorbing cover of the body is made of a steel plate with adhesive film and sound-absorbing cotton with a thickness of 35mm, which can efficiently absorb the noise generated when the unit is working, and prevent the noise from spreading outward; the shutters guide the air flow required for the unit to work. Enter the air intake noise reduction box, weaken the noise of the unit and directly radiate outward; the air intake noise reduction box (16) is a box body composed of 6 sound-absorbing sheets, and the sound-absorbing sheet (23) divides the air intake into 7 uniform channels The air duct effectively absorbs the noise generated by the air flow and radiates the noise of the unit to the outside. The air intake and exhaust air of the unit are separated, which can prevent the return of the exhaust air with high temperature; the exhaust air noise reduction box is composed of 7 mufflers (24) arranged in parallel and staggered from each other, forming an effective exhaust air space. It is conducive to the diffusion of exhaust air and the absorption of exhaust noise; the mesh exhaust vents are set on the top surface of the silent cover, which is conducive to the upward discharge of high temperature exhaust air. The exhaust muffler is composed of a two-stage composite muffler of impedance plus sound-absorbing type. The resistive muffler is arranged with porous sound-absorbing materials in the pipeline. When the airflow passes through the resistive muffler, the sound waves will cause the air and fine fibers in the pores of the sound-absorbing material to separate. Vibration, due to friction and viscous resistance, sound energy is converted into heat energy and absorbed, thereby playing a role in noise reduction; the resistant muffler is used to reduce narrow-band noise and low-frequency noise, and use different shapes of pipes and resonant cavities for appropriate combinations , with the help of reflection and interference caused by the mismatch of acoustic impedance caused by the change of pipe section and shape, the purpose of attenuating noise is achieved. the

The intelligent controller of the unit adopts ATmega64 chip to form a control circuit to control the engine speed, oil pressure, water temperature, DC power supply voltage and running time, etc. the

The unit of this utility model adopts active noise reduction technologies such as advanced structural optimization design, environmental protection sound-absorbing materials and multi-stage impedance plus sound-absorbing composite muffler, which reduces the noise of the 48kW unit to 60-65dB and realizes the ultra-quiet function. This technical solution is also applicable to 6~400kW units. The unit adopts an intelligent controller, which realizes the functions of automatic operation, detection, control, protection, remote measurement, remote control and remote signaling of the unit. the

Implementation example: The following uses TC66 ultra-quiet diesel generator set to illustrate the noise reduction technology of ultra-quiet diesel generator set. The basic components of the body mute cover are 2mm thick steel plates lined with 35mm thick adhesive film sound-absorbing cotton (25mm for units below 16KW) as the sound-absorbing layer. The air inlet passage is composed of air inlet louvers and air inlet noise reduction boxes. The length of the air deflector of the louvers is 50mm. The air inlet area is designed to ensure that the engine’s air intake system and the cooling system of the unit have enough fresh air to inhale. The wind panels are in the shape of a "Z" with a spacing of 50mm. The air intake winds into the unit through the wind deflector, reducing the noise of the unit and directly radiating outwards. The noise reduction box is composed of 6 noise reduction plates arranged in parallel Body with trapezoidal shape at both ends, lower resistance, smoother air flow and better noise reduction effect. The exhaust air channel is composed of the air intake noise reduction box and the ventilation hole. The exhaust air noise reduction box is a box composed of 7 pieces of mufflers arranged in parallel and staggered from each other. The two ends of the mufflers are trapezoidal. The pieces are staggered to form a more spacious exhaust channel, which makes the air discharge more smoothly and the noise reduction effect is better. The ventilation holes are composed of several 30mm×30mm square holes, which are located on the top surface of the silent cover, which is conducive to the upward discharge of hot air. . The muffler adopts a secondary impedance plus sound-absorbing composite muffler. The first-level muffler is a resistive muffler, and the sound-absorbing material is used to fill the surrounding of the pipe through which the exhaust passes; the second-level muffler is an impedance muffler, which uses a combination of resistant noise-absorbing units and sound-absorbing materials. Composite muffler; the composite muffler is placed in the silent cover of the body, which not only increases the muffler effect but also makes the appearance of the ultra-quiet diesel generator set more beautiful. the

Claims (4)

1. super-silent diesel generating set, comprising: motor (10), generator (11), generator set controller (12) and noise reduction structure (13) is characterized in that:

The rotating speed of motor, oil pressure, water temperature, DC electrical source voltage and working time are controlled by the generator set intelligent controller;

Ventilation channel (20) that the air intake passage (17) that the quiet cover (14) of body, venetian blind (15) and air intake noise reduction case (16) constitute, air draft noise reduction case (18) and vent hole (19) constitute and silencing apparatus (21) constitute the noise reduction structure (13) of super-silent diesel generating set.

2. a kind of super-silent diesel generating set according to claim 1; It is characterized in that: it is the metal shell that the steel plate of the gum pad pasting acoustical cotton of 35mm is processed by pasting thickness that the quiet cover of body is one, offers the sound proof door that air intake venetian blind, air draft vent hole and operation unit are used on the housing.

3. a kind of super-silent diesel generating set according to claim 1; It is characterized in that: the noise reduction case is the casing that the anechoic sheet by parallel distribution constitutes; 6 anechoic sheets that are arranged in parallel are divided into 7 parts with air intake noise reduction case (16); Air draft noise reduction case (18) internal structure by 7 be arranged in parallel, the anechoic sheet that staggers each other in the position constitutes, the anechoic sheet rear and front end all is trapezoidal shape.

4. a kind of super-silent diesel generating set according to claim 1 is characterized in that: the unit silencing apparatus is the secondary composite muffler (21) that impedance adds the sound-absorbing type, and composite muffler places within the quiet cover of body.

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