Diesel screw air compressor preheating system with silencer

Abstract

The utility model discloses a diesel screw air compressor preheating system with a silencer, which comprises a diesel engine (9), an oil separation barrel (8) and a heater (7), an engine water outlet (1) of the diesel engine (9) is connected with an oil separation barrel water inlet (5) through a pipeline, an oil separation barrel water outlet (6) is connected with a heater water inlet through a pipeline, and the heater (7) is connected with the diesel engine (9) through a pipeline. The heater water outlet (3) is connected with the engine water inlet (2) through a pipeline; before an air compressor is started, cooling liquid enters a heater (7) through a pipeline to be heated, the heated cooling liquid enters a diesel engine (9) to be preheated, and an air compressor system is added to a proper temperature; and a silencer (10) for reducing noise is also arranged on an exhaust pipe of the diesel engine (9). The problems that an air compressor system is difficult to cold start and loud in noise are effectively solved, and the system stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, specifically to a preheating system for a diesel screw air compressor with a muffler. Background Technology

[0002] Air compressors, as a type of general-purpose mechanical equipment, are widely used in various sectors of the national economy. However, current diesel screw air compressors have the following problems:

[0003] Starting difficulties: In low-temperature environments, the temperature of the diesel engine's fuel system, lubrication system, and cylinder will decrease, leading to problems such as poor fuel atomization, poor lubrication, and insufficient cylinder compression, which makes it difficult to start the air compressor.

[0004] Increased wear: Due to difficulty in starting, operators may attempt to start the engine multiple times or force it to start, which will cause significant impact and wear on the diesel engine components, especially the cylinders, pistons, connecting rods, and other parts; over time, this will shorten the service life of the air compressor.

[0005] Power reduction: When an air compressor without a preheating device starts at low temperatures, its fuel combustion is incomplete, and the temperature and pressure inside the cylinder are low, resulting in a reduction in the power of the air compressor; this will affect the normal operation and compression efficiency of the air compressor.

[0006] In low-temperature environments, diesel engines need to consume more fuel to provide sufficient heat and power in order to maintain normal operation. This not only increases operating costs but may also lead to incomplete combustion of fuel, resulting in problems such as black smoke and carbon deposits.

[0007] Impact on equipment stability: Air compressors without preheating devices may be affected by temperature fluctuations during startup and operation, leading to equipment instability. This instability may affect the compression performance and service life of the air compressor.

[0008] In addition, the side noise generated by diesel screw air compressors during operation seriously affects people's work and life. Utility Model Content

[0009] The purpose of this utility model is to provide a diesel screw air compressor preheating system with a muffler to address the above-mentioned problems, effectively solving the problems of difficult cold start and high noise in air compressor systems, and improving system stability.

[0010] The technical solution of this utility model is as follows:

[0011] A preheating system for a diesel screw air compressor with a muffler includes a diesel engine, an oil separator, and a heater. The engine outlet of the diesel engine is connected to the oil separator inlet via a pipe, the oil separator outlet is connected to the heater inlet via a pipe, and the heater outlet is connected to the engine inlet via a pipe. Before the air compressor starts, coolant enters the heater through a pipe for heating, and the heated coolant enters the diesel engine for preheating, bringing the air compressor system to a suitable temperature. A muffler for noise reduction is also installed on the exhaust pipe of the diesel engine.

[0012] Furthermore, the muffler includes an inner tube and an outer cylinder, with at least two outer baffles and at least one inner plate welded between the inner tube and the outer cylinder, and the outer baffles and the inner plates being equally spaced and staggered.

[0013] Furthermore, the muffler has silencing holes on both the inner tube and the inner plate, and the silencing holes on the inner tube and the inner plate are evenly distributed.

[0014] Furthermore, the outer baffle has the same dimensions as the inner plate, and the outer diameter of the outer baffle and the inner plate is the same as the outer diameter of the outer cylinder, and the inner diameter of the outer baffle and the inner plate is the same as the outer diameter of the inner tube.

[0015] Furthermore, the number of outer baffles is four, and the number of inner baffles is three.

[0016] Furthermore, an air inlet pipe I and an air inlet pipe II are provided at one end of the outer cylinder, which are perpendicular to each other. The air inlet pipe I is arranged radially along the outer cylinder, and the air inlet pipe II is arranged radially perpendicular to the outer cylinder (105).

[0017] Furthermore, the diameter of intake pipe I and intake pipe II is the same as the diameter of the inner pipe.

[0018] Furthermore, both intake pipe I and intake pipe II are equipped with flanges.

[0019] Furthermore, the overall length of the silencer is 902.5 mm, and the length of the outer cylinder is 77 mm.

[0020] Furthermore, the distance between the outer baffle and the inner plate is 112.9mm-123mm.

[0021] Compared with existing technologies, the beneficial effects of this utility model are:

[0022] 1. This system can effectively solve the problem of difficult cold start of air compressor system, reduce wear on the internal mechanism of engine and screw compressor head, and extend service life; ensure the power output of the entire system at constant temperature, reduce system energy consumption, and improve system stability;

[0023] 2. The muffler in this application system has a simple structure and small size. It is integrated with the air intake hose, making it easy to install, widely applicable, and with a significant noise reduction effect.

[0024] 3. The silencer of this application has no negative effects and will not affect the performance of the machine body; and the silencer is tapered at both ends, so that various silencer devices can be made to meet the requirements of multi-frequency noise reduction according to the length, diameter, opening ratio of the internal core tube and the wall volume. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the system structure of this application.

[0026] Figure 2 This is a diagram of the muffler assembly of the system in this application.

[0027] Figure 3 This is a schematic diagram of the internal structure of the muffler in the system of this application.

[0028] Figure 4 This is another internal structure diagram of the muffler in the system of this application.

[0029] Attached reference numerals: 1-Engine outlet, 2-Engine inlet, 3-Heater outlet, 4-Heater inlet, 5-Oil separator inlet, 6-Oil separator outlet, 7-Heater, 8-Oil separator, 9-Diesel engine, 10-Muffler;

[0030] 101-Flange, 102-Inlet pipe I, 103-Inlet pipe II, 104-Outer baffle, 105-Outer cylinder, 106-Inner plate, 107-Inner pipe. Detailed Implementation

[0031] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0033] Please see Figure 1-4A preheating system for a diesel screw air compressor with a muffler, such as Figure 1 As shown, the system includes a diesel engine 9, an oil separator tank 8, and a heater 7. The engine outlet 1 of the diesel engine 9 is connected to the oil separator tank inlet 5 via a pipe, the oil separator tank outlet 6 is connected to the heater inlet via a pipe, and the heater outlet 3 is connected to the engine inlet 2 via a pipe. Before the air compressor starts, coolant enters the heater 7 through a pipe for heating. The heated coolant then enters the diesel engine 9 for preheating, bringing the air compressor system to a suitable temperature before operation, thus achieving heating water circulation throughout the system. A muffler 10 is also installed on the exhaust pipe of the diesel engine 9 to reduce noise. This effectively solves the problem of difficult cold starts in the air compressor system, reduces wear on the internal mechanisms of the engine and screw compressor head, extends service life, ensures stable power output of the entire system, reduces system energy consumption, and improves system stability.

[0034] like Figure 3 and Figure 4 As shown, the muffler 10 includes an inner tube 107 and an outer cylinder 105. At least two outer baffles 104 and at least one inner plate 106 are welded between the inner tube 107 and the outer cylinder 105. The outer baffles 104 and the inner plate 106 are equally spaced and staggered. Both the inner tube 107 and the inner plate 106 of the muffler 10 are provided with silencing holes, and the silencing holes on the inner tube 107 and the inner plate 106 are evenly distributed.

[0035] The outer baffle 104 has the same dimensions as the inner plate 106, and the outer diameter of the outer baffle 104 and the inner plate 106 is the same as the outer diameter of the outer cylinder 105. The inner diameter of the outer baffle 104 and the inner plate 106 is the same as the outer diameter of the inner tube 107. There are four outer baffles 104 and three inner plates 106.

[0036] The muffler has a simple structure and small size. It is integrated with the air intake hose, making it easy to install, widely applicable, and with a significant noise reduction effect.

[0037] An intake pipe I 102 and an intake pipe II 103, perpendicular to each other, are provided at one end of the outer cylinder 105. Intake pipe I 102 is arranged radially along the outer cylinder 105, and intake pipe II 103 is arranged radially perpendicular to the outer cylinder 105. The diameter of intake pipe I 102 and intake pipe II 103 is the same as the diameter of the inner pipe 107. A flange 101 is provided on both intake pipe I 102 and intake pipe II 103. The flange 101 is welded to intake pipe I 102 and intake pipe II 103, and bolt holes are provided on the flange 101 for mounting on the exhaust pipe of the diesel engine 9.

[0038] like Figure 2As shown, the overall length of the muffler 10 is 902.5 mm, and the length of the outer cylinder 105 is 77 mm. The distance between the outer baffle 104 and the inner plate 106 is 112.9 mm to 123 mm. The distance between the outer baffle 104 and the inner plate 106 can be 122.5 mm, 113.4 mm, 113.1 mm, 112.9 mm, or 123 mm. The length of the intake pipe II 103 is 80.2 mm, and the length of the intake pipe I 102 is 102.5 mm.

[0039] The silencer has no negative effects and will not affect the performance of the machine; moreover, the silencer has a tapered end, which can be made into various silencers that meet the requirements of multi-frequency noise reduction according to the length, diameter, opening ratio of the internal core tube and the volume of the wall.

[0040] The principle of the silencer in this application is as follows:

[0041] Resistive silencer; this type of silencer utilizes sound-absorbing materials. These materials are fixed to the inner wall of the airflow channel or arranged in a specific way within the pipe, thus forming a resistive silencer. When sound waves enter the resistive silencer, some of the sound energy is converted into heat energy through friction within the pores of the porous material, dissipating and weakening the sound waves passing through the silencer. Characteristics: It has good noise reduction effect on mid-to-high frequencies but poor effect on low frequencies, and is suitable for situations with low gas flow rates.

[0042] Reactive silencers reduce the amount of sound radiated outward by reflecting and interfering with the sound energy due to changes in impedance caused by abrupt changes in the pipe cross-section or by adjacent resonant cavities. Sound waves propagate through two pipes with different cross-sections, from pipe S1 to pipe S2. Pipe S2 acts as a sound load on pipe S1, causing some sound wave reflection and transmission. Features: Primarily suitable for reducing low-frequency and mid-low-frequency noise. The biggest advantage of reactive silencers is that they do not require porous sound-absorbing materials. Therefore, they are better than resistive silencers in conditions requiring high temperature resistance, moisture resistance, high flow velocity, and high cleanliness. They are suitable for air compressors, internal combustion engines, and automobile exhaust noise (in cases of high air velocity).

[0043] Impedance composite noise reduction: This type of noise reduction combines resistive and reactive noise reduction principles through a suitable structure. It can be qualitatively considered as the superposition of the noise reduction values ​​of resistive and reactive forces in the same frequency band (not a simple superposition relationship). Characteristics: It has low, medium, and high frequency noise reduction performance and is suitable for eliminating noise from blowers, large wind tunnels, and test benches.

[0044] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A preheating system for a diesel screw air compressor with a muffler, characterized in that, The system includes a diesel engine (9), an oil separator (8), and a heater (7). The engine outlet (1) of the diesel engine (9) is connected to the oil separator inlet (5) via a pipe, the oil separator outlet (6) is connected to the heater inlet via a pipe, and the heater outlet (3) is connected to the engine inlet (2) via a pipe. Before the air compressor is started, the coolant enters the heater (7) via a pipe for heating. The heated coolant enters the diesel engine (9) for preheating, bringing the air compressor system to a suitable temperature. The exhaust pipe of the diesel engine (9) is also equipped with a muffler (10) to reduce noise.

2. The preheating system for a diesel screw air compressor with a muffler according to claim 1, characterized in that, The silencer (10) includes an inner tube (107) and an outer cylinder (105). At least two outer baffles (104) and at least one inner plate (106) are welded between the inner tube (107) and the outer cylinder (105). The outer baffles (104) and the inner plate (106) are equally spaced and staggered.

3. A preheating system for a diesel screw air compressor with a muffler according to claim 2, characterized in that, The silencer (10) has silencer holes on its inner tube (107) and inner plate (106), and the silencer holes on the inner tube (107) and inner plate (106) are evenly distributed.

4. A preheating system for a diesel screw air compressor with a muffler according to claim 2, characterized in that, The outer baffle (104) has the same size as the inner plate (106), and the outer diameter of the outer baffle (104) and the inner plate (106) is the same as the outer diameter of the outer cylinder (105). The inner diameter of the outer baffle (104) and the inner plate (106) is the same as the outer diameter of the inner tube (107).

5. A preheating system for a diesel screw air compressor with a muffler according to claim 4, characterized in that, The number of outer baffles (104) is four, and the number of inner baffles (106) is three.

6. A preheating system for a diesel screw air compressor with a muffler according to claim 5, characterized in that, The outer cylinder (105) is provided with an air inlet pipe I (102) and an air inlet pipe II (103) that are perpendicular to each other. The air inlet pipe I (102) is arranged radially along the outer cylinder (105), and the air inlet pipe II (103) is arranged radially perpendicular to the outer cylinder (105).

7. A preheating system for a diesel screw air compressor with a muffler according to claim 6, characterized in that, The diameter of the intake pipe I (102) and intake pipe II (103) is the same as that of the inner pipe (107).

8. A preheating system for a diesel screw air compressor with a muffler according to claim 7, characterized in that, Flanges (101) are provided on both intake pipe I (102) and intake pipe II (103).

9. A preheating system for a diesel screw air compressor with a muffler according to claim 2, characterized in that, The overall length of the silencer (10) is 902.5 mm, and the length of the outer cylinder (105) is 77 mm.

10. A preheating system for a diesel screw air compressor with a muffler according to claim 9, characterized in that, The distance between the outer baffle (104) and the inner plate (106) is 112.9mm-123mm.

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