A supersonic gas injector noise reduction structure

Abstract

The application discloses a supersonic gas injector noise reduction structure, which comprises a gas injector diffuser and a silencer device. The silencer device is installed at the gas outlet end of the gas injector diffuser, and the noise of the gas injector is reduced through the silencer device. The noise reduction device of the gas injector of the application does not change the flow resistance level of the gas injector, and therefore does not affect the original function of the gas injector and the working performance thereof. On the premise, the noise reduction device absorbs the noise generated by high-speed gas through the collision and friction of gas and silencing material, transfers and dissipates energy, greatly reduces the noise level of the gas injector, and creates a suitable working environment.

Description

Technical Field

[0001] This invention belongs to the technical field of supersonic jet devices, specifically relating to a noise reduction structure for supersonic gas jets suitable for steam generators, steam-air blowers, condenser steam ejectors, air-washing jets, gas burners, etc. Background Technology

[0002] A gas ejector is a fluid transport device that uses gas as the working medium to draw in and pressurize gases, liquids, and bulk solids, such as... Figure 1 As shown.

[0003] In a gas ejector, the working medium is accelerated through a Laval nozzle, and the velocity at the nozzle exit exceeds the speed of sound, even exceeding 1000 m / s, generating significant noise. Currently, there are two main ways to control ejector noise: one is to control the profile of the Laval nozzle to ensure its good aerodynamic performance, thereby reducing noise; the other is to thicken the ejector's mounting housing to block noise transmission.

[0004] With current design and manufacturing capabilities, it is difficult to make further breakthroughs in controlling the Laval nozzle profile, and the noise generated by supersonic speeds is difficult to suppress; thickening the injector's mounting housing not only increases the weight of the entire injector (including its mounting housing), but also makes it difficult to achieve significant improvement.

[0005] Currently, there is a lack of noise reduction structures for supersonic gas ejectors on the market. Therefore, there is an urgent need for a noise reduction structure for supersonic gas ejectors to reduce the noise level of the ejector, significantly improve the operating environment of the equipment, and enhance the comfort of the staff. Summary of the Invention

[0006] To reduce the noise level of the injector, significantly improve the operating environment of the equipment, and enhance the comfort of the staff, this invention proposes a noise reduction structure for a supersonic gas injector. This structure has design advantages such as integration, low manufacturing cost, and significant noise reduction effect.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a noise reduction structure for a supersonic gas injector, including a gas injector diffuser and a silencer, wherein a silencer is installed at the gas outlet end of the gas injector diffuser to reduce the noise of the gas injector.

[0008] Furthermore, the silencer is connected to the gas injector diffuser via a threaded connection.

[0009] Furthermore, the noise reduction device consists of an inner cylinder and an outer cylinder. The upper end of the outer cylinder is connected to the gas injector via threads. A corresponding sound-absorbing core is added between the inner cylinder and the outer cylinder, and the lower end is sealed by an end cap.

[0010] Furthermore, a silencing core is used to absorb some of the noise radiated by the gas injector, thereby reducing the noise level of the gas injector.

[0011] Furthermore, the inner cylinder of the noise reduction device has a porous structure. By adjusting the number and diameter of the holes and their arrangement on the inner cylinder, the noise reduction device's ability to receive gas-radiated noise can be altered.

[0012] Furthermore, the sound-absorbing core added between the inner and outer cylinders is filled with cores of different structures or materials to achieve different noise reduction effects.

[0013] The beneficial effects of this invention are:

[0014] Adding this gas ejector noise reduction device does not change the flow resistance level of the gas ejector, so it will not affect the original function and working performance of the gas ejector. Under this premise, the noise reduction device transfers and dissipates energy through the collision and friction between the gas and the sound-absorbing material, absorbs the noise generated by high-speed gas, and significantly reduces the noise level of the gas ejector by 3~5dB, creating a suitable working environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a gas ejector; Figure 2 This is a schematic diagram of a gas injector with a noise reduction device; Figure 3 This is a schematic diagram of a noise reduction device; Figure 4 This is a physical model diagram of the noise reduction structure of a supersonic gas ejector. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 2 As shown in the figure, an embodiment of the present invention provides a noise reduction structure for a supersonic gas ejector. Based on the structural characteristics of the gas ejector (including its mounting housing), a suitable length of silencer 2 is added to the diffuser outlet end of a conventional gas ejector 1, and the two are connected by threads. The noise of the gas ejector is reduced through the noise reduction effect of the silencer 2.

[0018] like Figure 3 As shown, the noise reduction device 2 consists of an inner cylinder 2-1 and an outer cylinder 2-2. The upper end of the outer cylinder 2-2 is connected to the gas injector 1 via threads. The inner cylinder 2-1 has a porous structure. A corresponding sound-absorbing core 2-3 is added between the inner cylinder 2-1 and the outer cylinder 2-2, and the lower end is sealed by an end cap 2-4. The sound-absorbing core 2-3 can absorb part of the noise radiated by the gas injector 1, reducing the noise level of the gas injector 1.

[0019] In this embodiment, the noise reduction device can be quickly assembled with the gas injector through the threaded structure at the upper end; the inner cylinder of the noise reduction device has a porous structure, and the ability of the noise reduction device to receive gas radiated noise can be changed by adjusting the number, diameter and layout of the holes on the inner cylinder; the sound-absorbing core added between the inner cylinder and the outer cylinder can be filled with cores of different structures or different materials to obtain different noise reduction effects.

[0020] Specific application examples Figure 4 As shown, a certain type of marine air extractor has adopted this noise reduction device with significant results.

[0021] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the concept and scope of the present invention. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A noise reduction structure for a supersonic gas ejector, characterized in that: It includes a gas injector diffuser and a silencer. A silencer is installed at the gas outlet of the gas injector diffuser to reduce the noise of the gas injector.

2. The noise reduction structure for a supersonic gas ejector according to claim 1, characterized in that: The silencer is connected to the gas injector diffuser via a threaded connection.

3. The noise reduction structure for a supersonic gas ejector according to claim 1, characterized in that: The noise reduction device consists of an inner cylinder and an outer cylinder. The upper end of the outer cylinder is connected to the gas injector by a thread. A corresponding sound-absorbing core is added between the inner cylinder and the outer cylinder, and the lower end is sealed by an end cap.

4. The noise reduction structure for a supersonic gas ejector according to claim 3, characterized in that: The noise-absorbing core is used to absorb some of the noise radiated by the gas injector, thereby reducing the noise level of the gas injector.

5. The noise reduction structure for a supersonic gas ejector according to claim 3, characterized in that: The inner cylinder of the noise reduction device has a porous structure. By adjusting the number, diameter, and layout of the holes on the inner cylinder, the ability of the noise reduction device to receive gas-radiated noise can be changed.

6. The noise reduction structure for a supersonic gas ejector according to claim 3, characterized in that: The sound-absorbing core added between the inner and outer cylinders is filled with cores of different structures or materials to achieve different noise reduction effects.

Images