CN111173774A - Nonmetal infusion pipeline capable of reducing vibration and sound energy transmission - Google Patents
Nonmetal infusion pipeline capable of reducing vibration and sound energy transmission Download PDFInfo
- Publication number
- CN111173774A CN111173774A CN202010021818.7A CN202010021818A CN111173774A CN 111173774 A CN111173774 A CN 111173774A CN 202010021818 A CN202010021818 A CN 202010021818A CN 111173774 A CN111173774 A CN 111173774A
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- centrifugal pump
- outlet
- vibration
- inlet
- pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Abstract
The invention provides a nonmetal infusion pipeline for reducing vibration and sound energy transmission. The device comprises a centrifugal pump and a liquid conveying pipeline formed by metal pipes connected to an inlet and an outlet of the centrifugal pump, wherein an inlet rubber section is arranged between the inlet of the centrifugal pump and the inlet metal pipe, and an outlet rubber section is arranged between the outlet of the centrifugal pump and the outlet metal pipe. The low-frequency noise in the pipeline system is mainly transmitted through the vibration of the pipe wall, the rubber pipe can effectively inhibit the vibration introduced into the pipeline system by the centrifugal pump, and the PVC pipe behind the rubber pipe has a further reduction effect on the vibration influence. The invention has clear overall principle, simple structure and convenient installation and operation, can effectively inhibit low-frequency vibration and noise in the infusion pipeline, does not increase the volume of the pipeline system, saves the installation space, and is suitable for being widely applied to the sea pipeline system of ships.
Description
Technical Field
The invention relates to a pipeline noise reduction structure, in particular to a transfusion pipeline system for realizing vibration and noise reduction by reducing the vibration of the wall of a transfusion pipeline.
Background
The ship radiation noise is formed by superposing three parts of mechanical noise, propeller noise and hydrodynamic noise, and in recent years, with the continuous improvement of the development level of mechanical equipment and the application of various vibration isolation technologies, the noise of a sea-going pipeline system becomes the bottleneck of the need of breaking through for the vibration reduction and the noise reduction of ships. A large number of liquid conveying pipeline systems exist in a ship, noise and vibration of the liquid conveying pipeline systems not only can affect the comfort of the ship, but also can reduce the service life of the ship, low-frequency noise has the characteristics of difficulty in elimination, high occupation ratio and long propagation, and becomes a key focus object in vibration reduction and noise reduction. Therefore, the low-frequency radiation noise of the infusion pipeline system is reduced, and the great significance is achieved for improving the stability of the whole system and improving the safety of the ship.
The silencing technology of the infusion pipeline is used for reference of an air pipeline and can be divided into two categories of passive silencing and active silencing. The passive muffling technology can be divided into traditional resistance muffling, air bag type muffling and hydrodynamic elastic plate type muffling. The patent document (CN203757977U) -a modular impedance and compensation composite muffler, the patent document (CN 2773455Y) -a dense joint impedance coincidence muffler adopts an impedance noise elimination method, has ideal reliability and safety, but is only limited to an air pipeline, and the effect of the noise elimination device in a liquid filling pipeline is greatly reduced due to the characteristic that the characteristic impedance of water is relatively longer than the wavelength of sound waves in water. Patent document (CN207438017U) -an air bag type seawater pipeline silencer, patent document (CN107795788A) -a novel large-caliber water silencer adopts an air bag type silencing method, which shows excellent acoustic performance in a wide frequency range with a relatively small structural size, but still has the problems that the reliability of the device is reduced due to excessive pressure bearing of a rubber sleeve, rubber is easy to corrode after being soaked in seawater, and the like. Hydrodynamic elastic plate type noise elimination technology is derived from an air pipeline, the silencer can show good low-frequency broadband noise elimination performance under the condition of small size, but the problems that the structural strength of an elastic plate is difficult to guarantee, the circumferential uniformity of a circular pipeline cannot be completely realized, and the like exist.
Patent document (CN 105333263a) -an active noise elimination device for controlling pipeline noise adopts an active noise elimination method, which is derived from air pipeline noise elimination, and the basic idea is to artificially emit secondary noise to control original noise, so as to achieve the purpose of eliminating the original noise, and have the advantage of small occupied space. However, the technology has a good effect only in a laboratory, the sound wave excitation and sound propagation rules in the sea-going pipeline system are far more complex than those in the laboratory, the internal environment of the ship is severe, the complexity of active noise elimination can be greatly improved, the reliability of the active noise elimination can be reduced, and the actual control effect is often difficult to satisfy.
Disclosure of Invention
The invention aims to provide a non-metal infusion pipeline which can effectively inhibit low-frequency vibration and noise in an infusion pipeline and reduce vibration and acoustic energy transmission.
The purpose of the invention is realized as follows: the device comprises a centrifugal pump and a liquid conveying pipeline formed by metal pipes connected to an inlet and an outlet of the centrifugal pump, wherein an inlet rubber section is arranged between the inlet of the centrifugal pump and the inlet metal pipe, and an outlet rubber section is arranged between the outlet of the centrifugal pump and the outlet metal pipe.
The present invention may further comprise:
1. and a PVC section is arranged between the outlet rubber section and the outlet metal pipe.
And 2, the length of the PVC section is more than or equal to twice of the distance between the inlet and the outlet of the centrifugal pump.
3. The length of the inlet rubber section is more than or equal to the distance between the inlet and the outlet of the centrifugal pump.
4. The length of the outlet rubber section is more than or equal to the distance between the inlet and the outlet of the centrifugal pump.
The invention provides a transfusion pipeline system for reducing vibration and sound energy transmission, which can effectively inhibit low-frequency noise in a transfusion pipeline and has the advantages of simple operation, space saving and the like.
The invention has clear overall principle, simple structure and convenient installation and operation, can effectively inhibit low-frequency vibration and noise in the infusion pipeline, does not increase the volume of the pipeline system, saves the installation space, and is suitable for being widely applied to the sea pipeline system of the ship.
The beneficial effects of the invention include:
the occupied space is small, and a silencing device does not need to be additionally arranged outside the pipeline; the vibration of the pipe wall is weakened by multiple poles, and the low-frequency noise in the pipe is obviously inhibited; the installation is simple, and the operating cost is low. Has very considerable application value.
Drawings
FIG. 1 is a schematic plan view of the present invention.
FIG. 2 is a schematic view of the connection of the rubber section to the centrifugal pump (metal pipe).
FIG. 3 is a schematic view of the connection between the rubber section and the PVC section.
FIG. 4 is a schematic view of the joint of PVC segment and metal pipe.
Fig. 5 shows the results of experimental comparison (full band) using the noise elimination means of the present invention and without the noise elimination means.
FIG. 6 shows the results of comparison of the experiments using the noise reducing means of the present invention with those without the noise reducing means (low frequency band).
Detailed Description
The invention is described in more detail below by way of example.
Referring to fig. 1, the piping system including a centrifugal pump is taken as an example, and the infusion piping system for reducing the transmission of vibration and sound energy includes a centrifugal pump 1, an inlet rubber section and an outlet rubber section 2, a PVC section 3 and a stainless steel metal section 4.
The inlet rubber section is arranged at the inlet end of the centrifugal pump, so that vibration transmission generated by liquid excitation pipe walls at the upstream of a pipeline when the centrifugal pump works is reduced, the inlet rubber section is connected with the centrifugal pump and the metal section through flanges 5, and the length of the inlet rubber section is not less than the distance between the inlet end and the outlet end of the centrifugal pump.
The outlet rubber section is arranged at the outlet end of the centrifugal pump, so that the excitation of the centrifugal pump to the vibration of the downstream pipe wall of the pipeline is reduced, the outlet rubber section is connected with the centrifugal pump and the PVC section through flanges, the end A is connected with the outlet of the centrifugal pump, the end B is connected with the PVC section, and the length of the outlet rubber section is not less than the distance between the inlet end and the outlet end of the centrifugal pump.
The PVC hose section is arranged at the end B of the outlet rubber section, and PVC with stronger vibration isolation capability is adopted, so that the transmission of pipeline vibration caused by the centrifugal pump is further reduced, the PVC hose section is connected with the outlet rubber section and the PVC section through flanges, and the length of the PVC hose section is not less than two times of the distance between the inlet end and the outlet end of the centrifugal pump.
The pipe diameter of a stainless steel metal pipe is 65mm in national standard, the model of a centrifugal pump is ISG65-125, the pipe diameter is the same as that of the stainless steel pipe and is 65mm, and the distance between an outlet end and an inlet end is 340 mm. The length of the rubber section is not less than the distance between the inlet end and the outlet end of the centrifugal pump, in this case, the length of the rubber section is 500mm, the length of the PVC hose section is not less than twice the distance between the inlet end and the outlet end of the centrifugal pump, and in this case, the length of the PVC hose section is 1000 mm.
With reference to fig. 2, the rubber section, the metal pipe and the centrifugal pump are connected in the same direction and are connected through flanges, the metal flange plate penetrates through the tail end of the rubber pipe and is connected with the flange at one end of the metal pipe, rubber is clamped between the flanges, and no gasket needs to be additionally arranged.
Referring to fig. 3, the connection mode of the rubber section and the PVC hose is flange connection, the PVC section is sleeved into a high-neck flange and is fixed in a watertight manner by a metal hoop 6, rubber is clamped between the flanges, and no gasket is additionally arranged.
With reference to fig. 4, the PVC hose and the metal pipe are connected by flanges, which is consistent with the prior art, and no rubber is arranged between the flanges, and a rubber gasket is additionally arranged between the flanges to play a watertight and certain vibration damping role, and the rubber gasket is a flat rubber gasket.
With reference to fig. 5 and 6, in order to prove the actual noise reduction effect of the present invention, the radiation noise of the pipe orifice of the pipeline system using the noise reduction method of the present invention and not subjected to noise reduction treatment is measured respectively, the measuring method is a reverberation method, and the working frequency of the centrifugal pump is 50 Hz. After the noise reduction method is adopted, the low-frequency noise component is obviously reduced, in particular to a 50Hz frequency multiplication line spectrum generated by the work of a centrifugal pump.
The above description is only a preferred embodiment of the present invention, and other vibration sources in the pipeline besides the centrifugal pump can also be used for noise reduction, and the present invention is not limited to the above embodiment, and should fall into the protection scope of the present invention as long as the technical effects of the present invention can be achieved by any means which are the same or similar.
Claims (5)
1. The utility model provides a reduce non-metallic infusion pipeline of vibration and acoustic energy transmission, includes the infusion pipeline that centrifugal pump and the tubular metal resonator who connects in the access & exit of centrifugal pump constitute, characterized by: an inlet rubber section is arranged between an inlet of the centrifugal pump and the inlet metal pipe, and an outlet rubber section is arranged between an outlet of the centrifugal pump and the outlet metal pipe.
2. The non-metallic infusion line of claim 1 for reducing transmission of vibration and acoustic energy, wherein: and a PVC section is arranged between the outlet rubber section and the outlet metal pipe.
3. The non-metallic infusion line of claim 2 for reducing transmission of vibration and acoustic energy, wherein: the length of the PVC section is more than or equal to two times of the distance between the inlet and the outlet of the centrifugal pump.
4. The non-metallic infusion pipeline of claim 1, 2 or 3 for reducing transmission of vibration and acoustic energy comprising: the length of the inlet rubber section is more than or equal to the distance between the inlet and the outlet of the centrifugal pump.
5. The non-metallic infusion pipeline of claim 1, 2 or 3 for reducing transmission of vibration and acoustic energy comprising: the length of the outlet rubber section is more than or equal to the distance between the inlet and the outlet of the centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010021818.7A CN111173774A (en) | 2020-01-09 | 2020-01-09 | Nonmetal infusion pipeline capable of reducing vibration and sound energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010021818.7A CN111173774A (en) | 2020-01-09 | 2020-01-09 | Nonmetal infusion pipeline capable of reducing vibration and sound energy transmission |
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| Publication Number | Publication Date |
|---|---|
| CN111173774A true CN111173774A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010021818.7A Pending CN111173774A (en) | 2020-01-09 | 2020-01-09 | Nonmetal infusion pipeline capable of reducing vibration and sound energy transmission |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2626594A1 (en) * | 1988-01-29 | 1989-08-04 | Werle Bernard | Anti-overflow device for spa-baths and small pools for leisure, thermal or medical purposes |
| US20030161720A1 (en) * | 2002-02-26 | 2003-08-28 | Smith Paul Michael | Turbine motor with noise reduction system |
| CN103075579A (en) * | 2013-01-15 | 2013-05-01 | 广新海事重工股份有限公司 | Damping cabin penetrating piece |
| CN103968184A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Pipeline vibration noise suppressor structure |
| CN104747456A (en) * | 2015-02-11 | 2015-07-01 | 邢台捷龙航科机械科技有限公司 | Portable engine-driven centrifugal pump |
| CN106930954A (en) * | 2017-04-17 | 2017-07-07 | 安徽省康宇水电机械成套设备有限公司 | A kind of Multifunction water pump |
| CN108561669A (en) * | 2018-03-09 | 2018-09-21 | 中国人民解放军海军工程大学 | Elastic back cavity type pipeline vibration-damping sound-damping device |
| CN109553823A (en) * | 2018-11-28 | 2019-04-02 | 天津市橡胶工业研究所有限公司 | Marine piping cladding rubber damping material and preparation method |
| CN208870800U (en) * | 2018-08-02 | 2019-05-17 | 天津华曼泵业集团有限公司 | A kind of centrifugal pump of low noise low vibration |
-
2020
- 2020-01-09 CN CN202010021818.7A patent/CN111173774A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2626594A1 (en) * | 1988-01-29 | 1989-08-04 | Werle Bernard | Anti-overflow device for spa-baths and small pools for leisure, thermal or medical purposes |
| US20030161720A1 (en) * | 2002-02-26 | 2003-08-28 | Smith Paul Michael | Turbine motor with noise reduction system |
| CN103075579A (en) * | 2013-01-15 | 2013-05-01 | 广新海事重工股份有限公司 | Damping cabin penetrating piece |
| CN103968184A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Pipeline vibration noise suppressor structure |
| CN104747456A (en) * | 2015-02-11 | 2015-07-01 | 邢台捷龙航科机械科技有限公司 | Portable engine-driven centrifugal pump |
| CN106930954A (en) * | 2017-04-17 | 2017-07-07 | 安徽省康宇水电机械成套设备有限公司 | A kind of Multifunction water pump |
| CN108561669A (en) * | 2018-03-09 | 2018-09-21 | 中国人民解放军海军工程大学 | Elastic back cavity type pipeline vibration-damping sound-damping device |
| CN208870800U (en) * | 2018-08-02 | 2019-05-17 | 天津华曼泵业集团有限公司 | A kind of centrifugal pump of low noise low vibration |
| CN109553823A (en) * | 2018-11-28 | 2019-04-02 | 天津市橡胶工业研究所有限公司 | Marine piping cladding rubber damping material and preparation method |
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Application publication date: 20200519 |
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| RJ01 | Rejection of invention patent application after publication |