CN110242412A - A kind of mute water-cooled generator group of totally enclosed type dust-protection type - Google Patents
A kind of mute water-cooled generator group of totally enclosed type dust-protection type Download PDFInfo
- Publication number
- CN110242412A CN110242412A CN201910662979.1A CN201910662979A CN110242412A CN 110242412 A CN110242412 A CN 110242412A CN 201910662979 A CN201910662979 A CN 201910662979A CN 110242412 A CN110242412 A CN 110242412A
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- China
- Prior art keywords
- water
- cooling
- cooled
- internal combustion
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000002485 combustion reaction Methods 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 239000000498 cooling water Substances 0.000 claims abstract description 24
- 238000005538 encapsulation Methods 0.000 claims abstract description 3
- 230000003584 silencer Effects 0.000 claims description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000003345 natural gas Substances 0.000 claims description 6
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000219289 Silene Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/044—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators the engine-generator unit being placed on a frame or in an housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The present invention provides a kind of mute water-cooled generator groups of totally enclosed type dust-protection type, comprising: water-cooled internal combustion engine has casing and internal combustion engine water cooling system, which is located at casing internal；Water-cooled generator, has shell and generator driven water cooling system, which is located at interior of shell；Dustproof case, the totally-enclosed encapsulation water-cooled internal combustion engine and the water-cooled generator, do not stay inlet and outlet；Water tank is set to outside the dustproof case；The generator driven water cooling system, cooling water of internal combustion engine system and water tank head and the tail connection are formed cooling water loop by Water-cooling circulating pipeline.The present invention is external by water tank, and generating set is really accomplished to completely enclosed structure, can not only accomplish thoroughly dust-proof, moreover it is possible to further decrease the noise of generating set itself.
Description
Technical field
It is the present invention relates to a kind of water-cooled generator group, in particular to a kind of to be sent out with the water cooling of dust-proof effect and muting function
Motor group.
Background technique
Generating set (English name: Generators Set) is the complete machine by the energy conversion of other forms at electric energy
Tool equipment is made of dynamical system (internal combustion engine), control system, silene system, shock mitigation system, exhaust system, by the hydraulic turbine, vapour
The driving of turbine, diesel engine or other dynamic power machines, the energy that water flow, air-flow, fuel combustion or nuclear fission are generated turn
It turns to mechanical energy and is transmitted to generator, then electric energy is converted to by generator, be output in electrical equipment and use.
For water-cooled generator group is with respect to air-cooled generator group, the internal combustion engine of water-cooled generator group is water cooling internal combustion
Machine, generator are water-cooled generator.The characteristics of water-cooled internal combustion engine and water-cooled generator is exactly to utilize water to replace electronic fan pair
Key position is cooled down.Due to having lacked the operation of electronic fan, low-noise performance is that air-cooled generator group is incomparable
's.
By those skilled in the art it is found that dust is for generating set, there is very big harm, not only will affect hair
The heat dissipation performance of motor group, but also will affect diesel oil, the fine and clean degree of machine oil and the service life of oil pump, it is even more serious
It is that, in wet environment, dust also will form conductive media, electric leakage accident is caused to occur.For generating set, dust-proof is one
A important proposition.
Although however water-cooled generator group have superior anti-acoustic capability, due to the water circulation system currently used for water cooling
It is embedding structure, the water tank to supply water especially for water circulation system is also built in version, therefore for feed-tank cooling, with regard to nothing
Generating set is arranged to completely enclosed structure by method, and still needs to setting inlet and outlet, to take away the heat on water tank.And once
It is arranged to non-fully closed structure, can not necessarily accomplishes complete dust-proof.Moreover, because completely enclosed knot can not be arranged to
Structure, noise is still larger, and the noise of predominantly internal combustion engine leaks.It is remote at 7 meters from existing water-cooled generator group through measuring
The noise that place measures is up to 75 decibels or so.Only the water-cooled generator group lower than 63 decibels has been accomplished by Japan at present, traces it to its cause
It is because their internal combustion engine noise itself is smaller, however to reduce internal combustion engine noise itself is extremely difficult thing.
As: disclosed in 20181130, it is quiet that the Chinese invention of Publication No. CN208168974U discloses a kind of dust-protection type
Sound generating set, including generator, engine and cabinet, are characterized by: only three faces are equipped with air inlet to cabinet, are centrally located at case
The rear portion of body.The air inlet is located at the left and right rear end surface of cabinet and rear end surface, is additionally provided with dust-proof air filter in cabinet
Filter the B/P EGR Back Pressure Transducer EGR for entering and case intracorporal air and capable of alarming when negative pressure reaches certain value in cabinet.The present invention be
It is improved on the basis of existing mute power generator group, by cancelling the air inlet on cabinet door, increasing dust-proof air filter
It with the mode of setting B/P EGR Back Pressure Transducer EGR, obstructs the dust outside generating set and enters in generating set, and B/P EGR Back Pressure Transducer EGR can
It reminds staff to replace air filter in time, further ensures dust-proof effect, generating set is avoided to overheat and do sth. in advance
Abrasion.Although its air inlet on cabinet door increases dust-proof air filter, the partial size of dust is too small after all, filtering effect
Fruit is limited, and the presence of air filter affects ventilation speed and heat dissipation performance also receives strong influence.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of mute water-cooled generator group of totally enclosed type dust-protection type, incite somebody to action
Water tank is external, and generating set is really accomplished to completely enclosed structure, can not only accomplish thoroughly dust-proof, moreover it is possible to make generating set
The noise of itself further decreases.
The present invention is implemented as follows: a kind of mute water-cooled generator group of totally enclosed type dust-protection type, comprising:
Water-cooled internal combustion engine, has casing and internal combustion engine water cooling system, which is located at casing internal；
Water-cooled generator, has shell and generator driven water cooling system, which is located at interior of shell；
Dustproof case, the totally-enclosed encapsulation water-cooled internal combustion engine and the water-cooled generator, do not stay inlet and outlet；
Water tank is set to outside the dustproof case；
Water-cooling circulating pipeline connects the generator driven water cooling system, cooling water of internal combustion engine system and water tank head and the tail
It connects to form cooling water loop.
Further, preferred embodiment according to the present invention, the water tank include that bracket, cooling fin and large area are flat
Canister, the bracket are supportedly connected to the lower section of the canister, and cooling fin distribution ground connects the metal
The bottom surface of container.
Further, preferred embodiment according to the present invention further includes an at least electronic fan, the electronic fan connection
It dries in the water tank and against the water surface and/or the cooling fin.
Further, preferred embodiment according to the present invention, the water-cooled internal combustion engine also have muffler pipe, the noise elimination
It is additionally provided with silencer cooling water system in device, the silencer cooling water system is serially connected in the generator driven water cooling system and described
Between cooling water of internal combustion engine system.
Further, according to a particular embodiment of the invention, the silencer have shell, water inlet, water out and
Airflow line is equipped with water flow passage between the airflow line and shell, the water inlet, the water out are each provided on shell simultaneously
It is connected to the water flow passage；The water inlet, the water out and the water flow passage constitute the silencer cooling water system.
Further, preferred embodiment according to the present invention further includes retarder, and the water-cooled internal combustion engine is natural gas water
Cold internal combustion engine, the water-cooled internal combustion engine also have flywheel, and the water-cooled generator has rotor；The retarder connection is described to fly
Between wheel and rotor, and the revolving speed of the flywheel, between 2200-2600 revs/min, the rotor speed is then 1500-1800
Rev/min.
The present invention has the advantages that water-cooled generator group of the invention, will be the water tank to cooling water supply by water cooling
The inside of generating set moves on to outside, not only greatly improves the draught capacity of water tank, to largely improve cooling
Effect, and generating set can really be accomplished to completely enclosed structure, without staying inlet and outlet, can not only accomplished thoroughly
It is dust-proof, moreover it is possible to so that the noise of generating set itself is not easy unofficial biography, especially block the noise of water-cooled internal combustion engine itself, to reach
It is just so-called to achieve many things at one stroke to excellent noise reduction effect.Water-cooled generator group of the present invention is measured at a distance at 7 meters from water-cooled generator group
Resulting noise only reaches 55 decibels or so, is not only far below the noise of traditional water-cooled generator group, also sends out than Japanese water cooling
The noise of motor group greatly reduces.
Detailed description of the invention
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural schematic diagram of water-cooled generator group embodiment one of the present invention.
Fig. 2 is the structural schematic diagram of water-cooled generator group embodiment two of the present invention.
Fig. 3 is the structural schematic diagram of the silencer of water-cooled internal combustion engine in the present invention.
Fig. 3 a is cross-sectional view of the Fig. 3 along B-B.
Fig. 4 is the overlooking structure diagram of water tank in the present invention.
Fig. 5 is the structural schematic diagram of water-cooled internal combustion engine and water-cooled generator junction in the present invention.
Specific embodiment
Embodiment one
Refering to Figure 1, the water-cooled generator group of the present embodiment, comprising:
Water-cooled internal combustion engine 1, has casing 11 and internal combustion engine water cooling system 12, which is located at casing 11
It is internal；
Water-cooled generator 2, has shell 21 and generator driven water cooling system 22, which is located at shell 21
It is internal；
Dustproof case 3, it is totally-enclosed to encapsulate the water-cooled internal combustion engine 1 and the water-cooled generator 2, do not stay inlet and outlet；
Water tank 4 is set to outside the dustproof case 3, is such as located at 3 over top of dustproof case, and have one from dustproof case 3
Section apart from when it is preferable, water tank 4 can be made also sufficiently to divulge information；
Water-cooling circulating pipeline 5, by the generator driven water cooling system 22, cooling water of internal combustion engine system 12 and the water tank 4
Head and the tail connection forms cooling water loop.
Embodiment two
It please refers to shown in Fig. 2, the water-cooled generator group of the present embodiment, the difference of the embodiment and embodiment one is:
Water-cooled internal combustion engine 1, also has silencer 13 and silencer cooling water system 14, and silencer cooling water system 14 is set to
Inside silencer 13；And the silencer cooling water system 14 is serially connected in the generator driven water cooling system 22 and the internal combustion engine is cold
But between water system 12.
That is Water-cooling circulating pipeline 5, the generator driven water cooling system 22, silencer cooling water system 14, internal combustion engine is cooling
Water system 12 and the water tank 4 connect from beginning to end forms cooling water loop.
As shown in Fig. 3 and Fig. 3 a, specifically, the silencer 13 have shell 131, water inlet 132, water out 133 with
And airflow line 134, water flow passage 135, the water inlet 132, the water are equipped between the airflow line 134 and shell 131
Outlet 133 is each provided on shell 131 and is connected to the water flow passage 135；The water inlet 132, the water out 133 and described
Water flow passage 135 constitutes the silencer cooling water system 14.
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 4, in a preferred embodiment of the invention, the water tank 4 includes bracket 41, dissipates
Backing 42 and the flat canister 43 of large area, the bracket 31 are supportedly connected to the lower section of the canister 43, institute
Connect the bottom surface of the canister 43 with stating the distribution of cooling fin 42.
In another preferred embodiment of the present invention, it further includes newly an at least electronic fan 6, the electronic fan that this is practical
6 are connected to the water tank 4 and dry against the water surface and/or the cooling fin 42.Since electronic fan is compared with conventional fan, make an uproar
Sound is smaller compared with the noise of water-cooled internal combustion engine itself, therefore still reduces noise on the whole.
As shown in figure 5, novel sheet practical 13 further includes retarder 7, the water in another embodiment of the invention
Cold internal combustion engine 1 is natural gas water-cooled internal combustion engine, and the water-cooled internal combustion engine 1 also has flywheel 15, and the water-cooled generator 2, which has, to be turned
Son 23；The retarder 7 connects between the flywheel 15 and rotor 23, and the revolving speed of the flywheel 15 is at 2200-2600 revs/min
Between clock, the rotor speed is then 1500-1800 revs/min.The generating efficiency of natural gas power unit can compare diesel generation
The decrease in power generation efficiency 30-40% of unit, it is therefore desirable to improve natural gas engine revolving speed, reach 2250 revs/min, make its hair
Electrical efficiency is in optimum state, but 122 revolving speed of rotor of generator is limited in 1500-1800 revs/min, wherein 1500 turns/
Minute is 50HZ, and 1800 revs/min are 60HZ.There is retarder 8 to be connected between flywheel 114 and rotor 122, so that it may make flywheel
114 revolving speed is maintained between 2200-2600 revs/min, and can restore revolving speed to 1500 revs/min to generator, so both
It improves power and guarantees requirement of the generator to rotor speed again.Such as the flywheel 15 of natural gas water-cooled internal combustion engine reach 2250 turns/
When minute, power 50% can be increased, fuel ratio can save 30% or so.
Although specific embodiments of the present invention have been described above, those familiar with the art should be managed
Solution, we are merely exemplary described specific embodiment, rather than for the restriction to the scope of the present invention, it is familiar with this
The technical staff in field should be covered of the invention according to modification and variation equivalent made by spirit of the invention
In scope of the claimed protection.
Claims (6)
1. a kind of mute water-cooled generator group of totally enclosed type dust-protection type, it is characterised in that: include:
Water-cooled internal combustion engine, has casing and internal combustion engine water cooling system, which is located at casing internal；
Water-cooled generator, has shell and generator driven water cooling system, which is located at interior of shell；
Dustproof case, the totally-enclosed encapsulation water-cooled internal combustion engine and the water-cooled generator, do not stay inlet and outlet；
Water tank is set to outside the dustproof case；
Water-cooling circulating pipeline, by the generator driven water cooling system, cooling water of internal combustion engine system and water tank head and the tail connection shape
At cooling water loop.
2. a kind of mute water-cooled generator group of totally enclosed type dust-protection type as described in claim 1, it is characterised in that: the water tank
It is supportedly connected to the lower section of the canister including bracket, cooling fin and the flat canister of large area, the bracket,
Cooling fin distribution ground connects the bottom surface of the canister.
3. a kind of mute water-cooled generator group of totally enclosed type dust-protection type as claimed in claim 2, it is characterised in that: further include to
A few electronic fan, the electronic fan are connected to the water tank and dry against the water surface and/or the cooling fin.
4. a kind of mute water-cooled generator group of totally enclosed type dust-protection type as described in claim 1, it is characterised in that: the water cooling
Internal combustion engine also has silencer, and silencer cooling water system, the silencer cooling water system string are additionally provided in the silencer
It connects between the generator driven water cooling system and the cooling water of internal combustion engine system.
5. a kind of mute water-cooled generator group of totally enclosed type dust-protection type as claimed in claim 4, it is characterised in that: the noise elimination
Device has shell, water inlet, water out and airflow line, and water flow passage, the water are equipped between the airflow line and shell
Import, the water out are each provided on shell and are connected to the water flow passage；The water inlet, the water out and the water flow
Road constitutes the silencer cooling water system.
6. a kind of mute water-cooled generator group of totally enclosed type dust-protection type as described in claim 1, it is characterised in that: further include subtracting
Fast device, the water-cooled internal combustion engine are natural gas water-cooled internal combustion engine, and the water-cooled internal combustion engine also has flywheel, the water-cooled generator
With rotor；The retarder connects between the flywheel and rotor, and the revolving speed of the flywheel is at 2200-2600 revs/min
Between, the rotor speed is then 1500-1800 revs/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910662979.1A CN110242412A (en) | 2019-07-23 | 2019-07-23 | A kind of mute water-cooled generator group of totally enclosed type dust-protection type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910662979.1A CN110242412A (en) | 2019-07-23 | 2019-07-23 | A kind of mute water-cooled generator group of totally enclosed type dust-protection type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110242412A true CN110242412A (en) | 2019-09-17 |
Family
ID=67893074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910662979.1A Pending CN110242412A (en) | 2019-07-23 | 2019-07-23 | A kind of mute water-cooled generator group of totally enclosed type dust-protection type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242412A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042915A (en) * | 2019-12-31 | 2020-04-21 | 重庆鼎工机电有限公司 | Cooling water circulation system of mute box unit |
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|---|---|---|---|---|
| CN101907009A (en) * | 2010-07-19 | 2010-12-08 | 中国人民解放军重庆通信学院 | Impedance composite water-cooled muffler for diesel generator set |
| CN203879620U (en) * | 2014-05-14 | 2014-10-15 | 镇江东方康驰电机制造有限公司 | Vehicle-mounted silent diesel engine generator set |
| CN204082324U (en) * | 2014-08-06 | 2015-01-07 | 优而耐(福州)动力制造有限公司 | Super-silent water-cooled generator group |
| CN205154386U (en) * | 2015-11-26 | 2016-04-13 | 济南吉美乐电源技术有限公司 | Subminiature silence generator unit |
| CN205955832U (en) * | 2016-08-19 | 2017-02-15 | 济南吉美乐电源技术有限公司 | Small -size silence generator unit of radiator disconnect -type |
| CN106677859A (en) * | 2017-02-21 | 2017-05-17 | 济南吉美乐电源技术有限公司 | Water cooling silencer suitable for box type mute low-power internal combustion engine generator set |
| CN210509378U (en) * | 2019-07-23 | 2020-05-12 | 优而耐(福州)动力制造有限公司 | Totally enclosed dust-protection silence water-cooled generator group |
-
2019
- 2019-07-23 CN CN201910662979.1A patent/CN110242412A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907009A (en) * | 2010-07-19 | 2010-12-08 | 中国人民解放军重庆通信学院 | Impedance composite water-cooled muffler for diesel generator set |
| CN203879620U (en) * | 2014-05-14 | 2014-10-15 | 镇江东方康驰电机制造有限公司 | Vehicle-mounted silent diesel engine generator set |
| CN204082324U (en) * | 2014-08-06 | 2015-01-07 | 优而耐(福州)动力制造有限公司 | Super-silent water-cooled generator group |
| CN205154386U (en) * | 2015-11-26 | 2016-04-13 | 济南吉美乐电源技术有限公司 | Subminiature silence generator unit |
| CN205955832U (en) * | 2016-08-19 | 2017-02-15 | 济南吉美乐电源技术有限公司 | Small -size silence generator unit of radiator disconnect -type |
| CN106677859A (en) * | 2017-02-21 | 2017-05-17 | 济南吉美乐电源技术有限公司 | Water cooling silencer suitable for box type mute low-power internal combustion engine generator set |
| CN210509378U (en) * | 2019-07-23 | 2020-05-12 | 优而耐(福州)动力制造有限公司 | Totally enclosed dust-protection silence water-cooled generator group |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042915A (en) * | 2019-12-31 | 2020-04-21 | 重庆鼎工机电有限公司 | Cooling water circulation system of mute box unit |
| CN111042915B (en) * | 2019-12-31 | 2024-01-26 | 重庆鼎工机电有限公司 | Cooling water circulation system of mute box unit |
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