CN219142008U - Load noise test board based on vertical water pump motor system - Google Patents

Abstract

The utility model relates to a noise test board, in particular to a load noise test board based on a vertical water pump motor system. The load noise test board comprises a bracket shock absorber, a sound insulation cover and a bottom plate for fixing a water pump motor system; the bracket shock absorber is arranged on a connecting bracket of the motor and the water pump and is used for dissipating vibration energy generated at the connecting bracket; the sound insulation cover is sleeved outside the water pump, the water pump is placed on the bottom plate, the sound insulation cover and the bottom plate are enclosed to form a closed sound insulation space, the coupling, the water pump body and the connecting support of the water pump are covered in the closed sound insulation space, and the motor is isolated outside the designed sound insulation space; and decibel acquisition devices are arranged around the motor. The load noise test board is capable of separating out vibration noise characteristics of the motor body in the actual load working process under the working state of the water pump motor system, effectively isolating load noise of the water pump side, and accordingly obtaining accurate time noise characteristics under the motor load working condition.

Description

Load noise test board based on vertical water pump motor system

Technical Field

The utility model relates to a noise test board, in particular to a load noise test board based on a vertical water pump motor system.

Background

In performance testing environments such as racks, accompanying equipment such as dynamometers typically radiate vibration noise outwards. If the noise level generated between the tested motor and the accompanying motor is similar, the noise of the motor body is covered, and the accurate noise of the motor during load cannot be obtained. For example, under the performance test environment of the actual working condition of the water pump motor system, the load water pump can radiate noise outwards, noise level close to that of the motor can cause noise of the motor body to be covered, and accurate noise during motor load cannot be obtained. In order to research the load vibration noise characteristics of the motor body under specific working conditions, a sound insulation system is usually required to be designed in a targeted manner according to a noise generation source, and the accuracy of identifying the body radiation noise under the motor load working condition is improved by isolating the noise of the dynamometer and the connecting part through the sound insulation device. Without the sound isolation design, it would be difficult to accurately identify the body radiated noise characteristics.

Chinese patent CN214843612U, whose publication date is 2021, 11, 23, discloses a motor noise testing device, which is provided with a closed box, the motor to be tested is placed in a V-shaped groove of the closed box, and at the same time, the closed box is also provided with a decibel collector, which reduces the interference of external noise and enhances the accuracy of the detection result. However, the vertical water pump motor system mainly comprises a lower water pump and an upper motor, and if a closed box body is additionally arranged outside the upper motor directly and the lower water pump is still exposed outside, the design difficulty of the box body structure is high and the stability is poor. On the other hand, according to the noise measurement method of the rotating electric machine and the limit standard GB 10069, a distance of 1m from the motor to be tested is required during noise test, if the sound insulation device is designed on the side of the motor to be tested, the required space is too large, the structural design of the box body is further enlarged, and the use is inconvenient.

Disclosure of Invention

In order to solve the defects of the prior art mentioned in the background art, the utility model provides a load noise test board based on a vertical water pump motor system.

The scheme of the load noise test bench based on the vertical water pump motor system is as follows: the device comprises a bracket shock absorber, a sound insulation cover and a bottom plate for fixing a water pump motor system;

the bracket shock absorber is closely arranged on a connecting bracket of the motor and the water pump and is used for dissipating vibration energy generated at the connecting bracket;

the sound insulation cover is sleeved outside the water pump, the water pump is arranged on the bottom plate, the sound insulation cover and the bottom plate are enclosed to form a closed sound insulation space, the coupling of the water pump, the water pump body and the connecting support are covered in the closed sound insulation space, and the motor is arranged outside the sound insulation space;

the motor noise collection device is used for collecting motor noise.

In one embodiment, the bracket damper is located within the sound deadening space.

In an embodiment, the sound insulation cover comprises at least two sub-covers, and adjacent sub-covers are detachably connected through a first connecting structure to form the sound insulation cover.

In an embodiment, the sound insulation space formed by closing the sound insulation cover and the bottom plate is filled with sound absorption materials.

In one embodiment, the bracket damper includes a damper body and a second connection structure; the shock absorber body is of an annular sleeve structure with a through hole in the middle, and the through hole is matched with the connecting bracket so that the connecting bracket is embedded in the through hole of the shock absorber body; the support shock absorber comprises at least two sub shock absorber bodies with arc structures, and the adjacent sub shock absorber bodies are detachably connected through a second connecting structure, so that the sub shock absorber bodies are connected and enclosed to form the shock absorber body.

In one embodiment, a closed cavity is arranged inside the shock absorber body, and discrete mass damping bodies are filled in the closed cavity.

In one embodiment, the damper body includes a housing and a cover plate that enclose the closed cavity; an opening is formed in the top of the sound insulation cover, and the opening is matched with the cover plate so that the cover plate is embedded in the opening; the cover plate is connected with the sound insulation cover through a third connecting structure.

In an embodiment, the sound insulation cover is further provided with a first opening and a second opening; the first opening and the second opening are respectively matched with a water inlet pipeline and a water outlet pipeline of the water pump, so that the water inlet pipeline penetrates through the first opening to enter the sound insulation space, and the water outlet pipeline penetrates through the second opening to enter the sound insulation space.

In one embodiment, the bottom of the water pump is provided with a fixed base; the water pump is characterized in that a fastening preformed hole is formed in the bottom plate, and the fixing base can be fixedly connected with the fastening preformed hole through a fastening piece so that the water pump is fixed on the bottom plate.

Based on the above, compared with the prior art, the load noise test board based on the vertical water pump motor system provided by the utility model has the following technical effects:

the load noise test board based on the vertical water pump motor system is a device for isolating the radiation noise of the load water pump in the load test process of the vertical water pump motor system; the load noise test board can effectively isolate load noise at the water pump side under the working state of the water pump motor system, and can separate out the vibration noise characteristic of the motor body in the actual load working process, so that the accurate noise characteristic of the motor under the load working condition can be obtained, and the load noise test board has an important effect on researching the noise and vibration characteristic of the motor under the load working condition under the specific condition.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

For a clearer description of embodiments of the utility model or of the solutions of the prior art, the drawings that are needed in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art; the positional relationships described in the drawings in the following description are based on the orientation of the elements shown in the drawings unless otherwise specified.

Fig. 1 is a schematic diagram of vibration spectrum and modal analysis in vibration noise characteristic analysis of a water pump motor system;

fig. 2 is a schematic structural diagram of a water pump motor test stand according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a water pump motor test stand according to a second embodiment of the present utility model;

fig. 4 is a schematic diagram of an internal structure of a water pump motor test stand according to an embodiment of the present utility model;

fig. 5 is a schematic view of a part of a load sound insulation device according to an embodiment of the present utility model;

fig. 6 is a schematic diagram showing a part of a split structure of a water pump motor test stand according to an embodiment of the present utility model;

fig. 7 is a schematic diagram II of a part of a water pump motor test stand according to an embodiment of the present utility model;

fig. 8 is a schematic diagram III illustrating a partial structure of a water pump motor test stand according to an embodiment of the present utility model;

fig. 9 is a schematic diagram showing a part of a split structure of a water pump motor test stand according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of a shock absorber according to an embodiment of the present utility model;

FIG. 11 is a schematic view illustrating a partial structure of a shock absorber according to an embodiment of the present utility model;

FIG. 12 is a schematic view of an internal structure of a shock absorber according to an embodiment of the present utility model;

fig. 13 is a schematic view illustrating an internal structure of a sound insulation cover according to an embodiment of the present utility model.

Reference numerals:

10 test bench, 100 load sound-proof device, 200 water pump, 300 motor, 400 db collection device, 110 sound-proof cover, 120 support shock absorber, 130 bottom plate, 140 noise reduction material, 110a sub-cover body, 111 sound-proof space, 112 first connecting structure, 113 open pore, 114 third connecting structure, 115 first opening, 116 second opening, 121 shock absorber body, 122 second connecting structure, 121a sub-shock absorber body, 1211 shell, 1212 cover plate, 1213 through hole, 1214 closed cavity, 1215 discrete mass damping body, 210 water pump body, 230 connecting support, 240 unable adjustment base.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model; the technical features designed in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that all terms used in the present utility model (including technical terms and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the present utility model belongs and are not to be construed as limiting the present utility model; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The utility model provides a noise test bench 10 as shown in the embodiment of fig. 2-13, wherein the noise test bench 10 comprises a load sound insulation device 100 based on a vertical water pump motor system and a decibel collecting device 400 arranged above the load sound insulation device 100, and the decibel collecting device 400 is used for collecting noise of a motor 300.

The scheme of the load sound insulation device 100 based on the vertical water pump motor system is as follows:

it includes a bracket damper 120, a sound insulation cover 110, and a bottom plate 130 for fixing a water pump motor system; the bracket damper 120 is tightly attached to the connection bracket 230 between the motor 300 and the water pump 200, and is used for dissipating vibration energy generated at the connection bracket 230, the sound insulation cover 110 is sleeved outside the water pump 200, and the water pump 200 is placed on the bottom plate 130, so that the sound insulation cover 110 and the bottom plate 130 enclose to form a sealed sound insulation space 111, so that the coupling of the water pump 200, the water pump body 210 and the connection bracket 230 are covered in the sealed sound insulation space 111, and the motor 300 is outside the sound insulation space 111.

Specifically, the vertical water pump motor system includes motor 300 and water pump 200, and wherein, motor 300 is connected and erects in water pump 200 top through linking bridge 230 with water pump 200, water pump 200 includes water pump body 210, shaft coupling and linking bridge 230, and under water pump motor system actual operating mode performance test environment, load water pump 200 can outwards radiate noise, causes motor 300 body noise to be covered up, can't acquire accurate motor 300 noise characteristic under the load operating mode. As shown in fig. 1, by analyzing the vibration noise characteristics of the water pump motor system, according to the modal analysis and the spectrum analysis result, it is shown that the inherent vibration characteristics of the flange bracket structure (i.e. the connecting bracket 230) of the motor 300 are one of the main sources of mechanical vibration of the structure generated during the operation of the motor 300, and not the vibration noise generated by the motor 300 body, and it is necessary to consider the vibration noise isolation.

Therefore, according to the load sound insulation device 100 provided by the utility model, aiming at the vibration of the connecting bracket 230 connected with the motor 300 at the upper end of the water pump 200, the bracket shock absorber 120 is arranged on the connecting bracket 230 of the motor 300 and the water pump 200 and is used for dissipating the vibration energy generated at the connecting bracket 230; meanwhile, through setting up sound insulation cover 110 and bottom plate 130, during the use, vertical water pump motor system settles on bottom plate 130, sound insulation cover 110 suit in the outside of water pump 200 makes sound insulation cover 110 with bottom plate 130 encloses and closes and form airtight sound insulation space 111 will the shaft coupling of water pump 200, water pump body 210 with linking bridge 230 cladding is in airtight sound insulation space 111, just motor 300 is in outside sound insulation space 111 to make water pump 200 and motor 300 be in two spaces respectively, keep apart the sound insulation to the noise that water pump 200 (including the shaft coupling of water pump 200, water pump body 210 and linking bridge 230) department produced, set up decibel collection system 400 and carry out noise collection to the motor 300 outside the sound insulation space 111.

The load sound insulation device 100 ensures normal work of a load under the working state of a water pump motor system, effectively isolates load noise at the side of the water pump 200, and can separate out vibration noise characteristics of a motor 300 body in the actual load working process, so that accurate noise characteristics of the motor 300 under the load working condition can be obtained, and the load sound insulation device has an important effect on researching noise and vibration characteristics of the motor 300 under the load working condition under specific conditions.

Preferably, the sound insulation cover 110 includes at least two sub-covers 110a, and adjacent sub-covers 110a are detachably connected to each other by a first connection structure 112 to form the sound insulation cover 110.

By arranging the sub-cover body 110a, when in use, the sub-cover body 110a is assembled outside the water pump 200 and detachably connected through the first connecting structure 112 to form a sound insulation cover 110 as a whole, and the sound insulation cover 110 and the bottom plate 130 are enclosed to form a closed sound insulation space 111. By the arrangement, the sound insulation cover 110 is easy to assemble and disassemble, and the water pump 200 is conveniently covered by the sound insulation cover 110.

Preferably, the first connecting structure 112 in this embodiment adopts a first connecting piece, for example, a sheet metal connecting piece can be used, and the first connecting piece is connected with the sub-cover body 110a through a bolt-nut connector, so that the sub-cover body 110a is assembled and connected together, and the assembled compact type and sound insulation effect are ensured.

It should be noted that, in the present embodiment, two adjacent sub-cover bodies 110a are connected by two first connection pieces, and the two connection pieces are respectively disposed at the upper portion and the lower portion thereof, so that according to the design concept described above, a person skilled in the art can adaptively adjust the number of the first connection pieces, including but not limited to embodiment schemes; similarly, the present embodiment employs two sub-housings 110a assembled, and according to the above concepts, a person skilled in the art can adaptively adjust the number of sub-housings 110a, including but not limited to embodiment solutions.

Preferably, the sound insulation space 111 formed by closing the sound insulation cover 110 and the bottom plate 130 is filled with a sound absorbing material 140.

The sound absorbing material 140 is provided so that the load noise of the wrapping position, i.e., the sound insulation space 111, can be effectively absorbed.

Preferably, the bracket damper 120 includes a damper body 121 and a second connection structure 122; the damper body 121 is an annular sleeve structure with a through hole 1213 in the middle, and the through hole 1213 is matched with the connecting bracket 230, so that the connecting bracket 230 is embedded in the through hole 1213 of the damper body 121; the bracket damper 120 includes at least two arc-shaped sub-damper bodies 121a, and the adjacent sub-damper bodies 121a are detachably connected by a second connection structure 122, so that the sub-damper bodies 121a are connected and enclosed to form the damper body 121.

Through setting up sub-shock absorber body 121a, during the use, assemble sub-shock absorber body 121a in linking bridge 230 department and can dismantle the connection through second connection structure 122 and form shock absorber body 121 wholly for linking bridge 230 inlays the dress in the through-hole 1213 of shock absorber body 121, guarantees that the load can work under normal operating mode. So set up, support shock absorber 120 is easier dismouting, makes things convenient for shock absorber body 121 suit on linking bridge 230.

Preferably, the second connection structure 122 in the present embodiment includes a bolt and a bolt mounting lug on the sub-damper body 121a, and is mounted on the bolt mounting lugs of the adjacent two sub-damper bodies 121a by the bolt, so that the adjacent two sub-damper bodies 121a are fixedly connected.

It should be noted that, in the present embodiment, two adjacent sub-damper bodies 121a are connected by the second connection structure 122, and according to the design concept, those skilled in the art adopt the second connection structure 122 with other structures, including but not limited to embodiment schemes; similarly, the present embodiment employs two sub-damper bodies 121a assembled, and one skilled in the art can adapt the number of sub-damper bodies 121a according to the above-described concept, including but not limited to embodiment solutions.

In this embodiment, the body of the circular ring-shaped sleeve structure bracket damper 120 formed by assembling the two semicircular arc-shaped sub-damper bodies 121a is adopted to match with the cylindrical connecting bracket 230, and according to the design concept, a person skilled in the art can adaptively adjust the shape of the body of the damper 120 to match with the connecting bracket 230 according to the shape of the connecting bracket 230, including but not limited to the embodiment scheme.

Preferably, a closed cavity 1214 is provided inside the shock absorber body 121, and the closed cavity 1214 is filled with discrete mass damper 1215.

It should be noted that, the bracket damper 120 and the discrete mass damper 1215 are both of the prior art, and the operation and construction thereof are not further described herein.

Preferably, the damper body 121 includes a housing 1211 and a cover plate 1212, the housing 1211 and the cover plate 1212 enclosing the closed cavity 1214; the sound insulation cover 110 is provided with an opening 113, and the opening 113 is matched with the cover plate 1212 so that the cover plate 1212 is embedded in the top of the opening 113; the cover plate 1212 is connected to the sound insulation cover 110 through the third connection structure 114, so that the bracket damper 120 is hidden in the sound insulation space 111, and the noise at the connection position is further reduced.

The cover plate 1212 is connected with the sound insulation cover 110 through the third connecting structure 114, so that the assembly compactness and sound insulation effect of the sound insulation cover 110 are further improved. And since the damper body 121 is connected with the sound insulation cover 110, the assembly compactness of the load sound insulation apparatus 100 is further improved.

Preferably, the third connecting structure 114 in this embodiment adopts a third connecting piece, for example, a sheet metal connecting piece may be used, and the third connecting piece is connected with the sub-cover body 110a and the cover plate 1212 through a bolt-nut connector, so that the sub-cover body 110a and the cover plate 1212 are connected together, and the assembled compactness and sound insulation effect are ensured.

It should be noted that, according to the design concept described above, a person skilled in the art may adaptively adjust the number of the third connecting pieces, including but not limited to embodiment schemes.

Preferably, the sound insulation cover 110 is further provided with a first opening 115 and a second opening 116; the first opening 115 and the second opening 116 are respectively matched with a water inlet pipeline and a water outlet pipeline of the water pump 200, so that the water inlet pipeline penetrates through the first opening 115 to enter the sound insulation space 111, and the water outlet pipeline penetrates through the second opening 116 to enter the sound insulation space 111.

Preferably, the water pump 200 includes a fixed base 240; the bottom plate 130 is provided with a fastening preformed hole, and the fixing base 240 may be fixedly connected with the fastening preformed hole through a fastening piece, so that the fixing base 240 of the water pump 200 is fixedly connected with the bottom plate 130.

So set up, unable adjustment base 240 accessible fastener with fastening preformed hole fixed connection, the water pump motor system of being convenient for and unable adjustment base 240 fixed connection, convenient and practical, and improved water pump motor system and laid stability.

Preferably, the bottom plate 130 is an iron plate.

The iron plate is used for fixing the fixing base 240, and the iron plate has large mass, so that the additional vibration generated in the working process of the water pump 200 can be further avoided.

Preferably, the decibel acquisition device 400 is arranged at four points in the circumferential direction of the motor 300 and 1m above the motor 300 according to the requirements of the test standard, and is used for acquiring the noise value of each point. Further preferably, the decibel collecting device 400 is a decibel collecting microphone.

In summary, the load sound insulation device 100 based on the vertical water pump motor system provided in the embodiment of fig. 2-13 has the following technical effects:

1) The load sound insulation device 100 can ensure normal work of a load in a working state of a water pump motor system, effectively isolate load noise at the side of the water pump 200, and separate out vibration noise characteristics of a motor 300 body in an actual load working process, so that accurate noise of the motor 300 during load can be obtained, and the load sound insulation device has an important effect on researching noise and vibration characteristics of the motor 300 under a load working condition under specific conditions;

2) The whole structure of the load sound insulation device 100 adopts a sheet metal structure, so that the processing requirement and the processing cost are low, and in addition, the structure form of sectional assembly is adopted, so that the load sound insulation device is easy to assemble and disassemble.

In addition, it should be understood by those skilled in the art that although many problems exist in the prior art, each embodiment or technical solution of the present utility model may be modified in only one or several respects, without having to solve all technical problems listed in the prior art or the background art at the same time. Those skilled in the art will understand that nothing in one claim should be taken as a limitation on that claim.

Although terms such as a sound insulation cover, a floor, a damper, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model; the terms first, second, and the like in the description and in the claims of embodiments of the utility model and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. Load noise testboard based on vertical water pump motor system, its characterized in that: comprises a bracket shock absorber, a sound insulation cover and a bottom plate for fixing a water pump motor system;

the bracket shock absorber is closely arranged on a connecting bracket of the motor and the water pump and is used for dissipating vibration energy generated at the connecting bracket;

the sound insulation cover is sleeved outside the water pump, the water pump is arranged on the bottom plate, the sound insulation cover and the bottom plate are enclosed to form a closed sound insulation space, the coupling of the water pump, the water pump body and the connecting support are covered in the closed sound insulation space, and the motor is arranged outside the sound insulation space;

the motor noise collection device is used for collecting motor noise.

2. The vertical water pump motor system based load noise test stand of claim 1, wherein: the bracket damper is located in the sound insulation space.

3. The vertical water pump motor system based load noise test stand of claim 1, wherein: the sound insulation cover comprises at least two sub-cover bodies, and the adjacent sub-cover bodies are detachably connected through a first connecting structure to form the sound insulation cover.

4. The vertical water pump motor system based load noise test stand of claim 1, wherein: the sound insulation space formed by closing the sound insulation cover and the bottom plate is filled with sound absorption materials.

5. The vertical water pump motor system based load noise test stand of claim 1, wherein: the bracket shock absorber comprises a shock absorber body and a second connecting structure;

the shock absorber body is of an annular sleeve structure with a through hole in the middle, and the through hole is matched with the connecting bracket so that the connecting bracket is embedded in the through hole of the shock absorber body;

the support shock absorber comprises at least two sub shock absorber bodies with arc structures, and the adjacent sub shock absorber bodies are detachably connected through a second connecting structure, so that the sub shock absorber bodies are connected and enclosed to form the shock absorber body.

6. The vertical water pump motor system based load noise test stand of claim 5, wherein: the shock absorber is characterized in that a closed cavity is formed in the shock absorber body, and discrete mass damping bodies are filled in the closed cavity.

7. The vertical water pump motor system based load noise test stand of claim 6, wherein: the shock absorber body comprises a shell and a cover plate, and the shell and the cover plate are enclosed to form the closed cavity;

an opening is formed in the top of the sound insulation cover, and the opening is matched with the cover plate so that the cover plate is embedded in the opening; the cover plate is connected with the sound insulation cover through a third connecting structure.

8. The vertical water pump motor system based load noise test stand of claim 4, wherein: the sound insulation cover is also provided with a first opening and a second opening;

the first opening and the second opening are respectively matched with a water inlet pipeline and a water outlet pipeline of the water pump, so that the water inlet pipeline penetrates through the first opening to enter the sound insulation space, and the water outlet pipeline penetrates through the second opening to enter the sound insulation space.

9. The vertical water pump motor system based load noise test stand according to any one of claims 1-8, wherein: the bottom of the water pump is provided with a fixed base; the water pump is characterized in that a fastening preformed hole is formed in the bottom plate, and the fixing base can be fixedly connected with the fastening preformed hole through a fastening piece so that the water pump is fixed on the bottom plate.

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