WO2013034019A1 - 发动机驱动的发电机 - Google Patents

发动机驱动的发电机 Download PDF

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Publication number
WO2013034019A1
WO2013034019A1 PCT/CN2012/077944 CN2012077944W WO2013034019A1 WO 2013034019 A1 WO2013034019 A1 WO 2013034019A1 CN 2012077944 W CN2012077944 W CN 2012077944W WO 2013034019 A1 WO2013034019 A1 WO 2013034019A1
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WIPO (PCT)
Prior art keywords
muffler
engine
cooling air
generator
air passage
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Application number
PCT/CN2012/077944
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English (en)
French (fr)
Inventor
钱有恒
唐铁军
Original Assignee
浙江乐恒动力科技有限公司
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Application filed by 浙江乐恒动力科技有限公司 filed Critical 浙江乐恒动力科技有限公司
Publication of WO2013034019A1 publication Critical patent/WO2013034019A1/zh

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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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • 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
    • F02B63/042—Rotating electric generators

Definitions

  • the present invention relates to an engine-driven generator, and more particularly to a generator structure for cooling a generator, an engine, and a muffler by using a specially arranged front and rear cooling air passage, and is particularly suitable for cooling effects of a generator and an engine.
  • An engine-driven generator that requires high volume and small volume requirements belongs to the field of generator technology.
  • the problem with such an existing generator structure is that: only cooling the engine will cause the muffler to be hot and easy to injure; when the muffler is added, in order to achieve the muffling effect, the muffler must have a large volume. In use, the muffler must be reserved for a large space to increase the total volume of the engine assembly. This requires a large fan and a complicated air duct. In the structure of the two air ducts, the rear air duct first cools the engine with a high temperature and then cools the generator.
  • the structure, the inlet air temperature at the generator is high and the subsequent cooling air is not utilized and the volume of the muffler is not large enough, and the generator and the fully enclosed engine generator having high requirements for engine cooling and noise reduction are required. It is difficult to meet the increasing comprehensive requirements of various standards.
  • the object of the present invention is to overcome the deficiencies in the prior art, and to provide an exhaust muffler that can be divided into two small volume chambers up and down but the total volume is larger than the separate exhaust muffler and arranged in the vacant position around the engine, and then the engine is used.
  • the two pressurized cooling airflows of the front and rear cooling fans are controlled as needed to control the operating temperature of the cooled components.
  • the generators with the lowest actual temperature are cooled first, and the engines with the lower temperature are re-cooled.
  • the cooling air whose temperature has been gradually increased is finally delivered to the cooling air.
  • the two chambers of the exhaust muffler with the highest actual temperature are cooled, thereby sequentially cooling the generator, the engine, the intake pipe, the muffler, controlling the engine and exhaust temperatures to reduce engine exhaust noise, and reducing the sound generation performance through the air passage.
  • the structure of the final noise purpose of the machine assembly due to the double-body structure of the air duct and the muffler, the air duct and the muffler components can be flexibly arranged in the available space around the generator, which is beneficial to reduce the generator system. total capacity. case:
  • An engine-driven generator comprising a generator front fan, a generator rear fan, a dual cooling air duct, a permanent magnet generator, an engine, a rear fan, and a two-stage upper and lower muffler cavity;
  • the double cooling wind includes a combination of a front cooling air passage combination and a rear cooling air passage;
  • the front cooling air duct combination includes a forward wind hood, a forward wind left cover, and a forward wind right cover.
  • the forward wind left cover and the forward wind right cover have a left and right structure
  • the front cooling air passage combination includes a generator front fan.
  • the permanent magnet generator, the upper part of the cylinder of the engine, the muffler inlet pipe and the muffler upper cavity the cooling air flows to the generator front fan, the permanent magnet generator, the engine cylinder and the cylinder head and above, the muffler intake pipe, a muffler upper cavity; at the same time, the forward windshield, the forward wind left cover and the forward wind right cover are assembled with the upper part of the engine cylinder through a fastener and a sealing band, so that the front cooling air forms an independent front cooling air passage
  • the front cooling air passage is formed by the front fan of the front cooling air passage combined with the front cooling air passage, the permanent magnet generator, the upper part of the cylinder of the engine, the muffler intake pipe, and the outer wall
  • the rear cooling air passage combination includes a rear air duct front cover, a rear air duct middle cover and a rear air duct rear cover, and the rear cooling air passage combination comprises a generator rear fan and a muffler lower cavity, and the cooling air flows to the engine cylinder in turn.
  • the generator rear fan and the lower cavity of the muffler at the same time, the rear air duct front cover, the rear air duct middle cover and the rear air duct rear cover are arranged in front and rear, and are connected with the engine through fasteners and sealing bands
  • the set is such that the aftercooling air forms an independent rear cooling air passage, and the rear cooling air passage is a rear cooling air passage group
  • the gap between the rear fan of the generator and the outer wall of the lower cavity of the muffler is included in the combination of the inner wall and the rear cooling air passage.
  • the generator components are arranged in a front-to-back order according to the cooling wind flow direction according to the combination of the generator front fan, the generator rear fan, the permanent magnet generator, the engine, the rear fan, and the muffler, and the muffler combination includes
  • the upper and lower chambers and the intake pipe, the communication pipe, the muffler air outlet, and the front cooling air duct combination contain the generator front fan, the permanent magnet generator, the engine above the cylinder, the muffler intake pipe and the muffler upper cavity portion;
  • the cooling air duct combination is forced from the engine casing and the oil sump to force the air to pass through, and then the fan suctions and pressurizes and accommodates the lower cavity of the muffler;
  • the front cooling air passage combination is assembled with the upper part of the engine cylinder through the fastener and the sealing belt.
  • the upper and lower cavities of the muffler are connected to the engine and the front air duct front cover by bolts.
  • the invention can combine the supercharged cooling air of the two fans in front and rear of the engine through the two cooling air passages before and after, respectively, to surround the intake pipe of the cooling permanent magnet generator, the engine, the two-stage muffler, and the upper and lower chambers, and communicate with each other.
  • the outer surface of the tube greatly reduces the body temperature of the permanent magnet generator, the engine, the two-stage muffler combination, and the exhaust temperature at the air outlet of the muffler, which is beneficial to improving the noise reduction cooling effect of the generator assembly.
  • the front and rear cooling air duct combinations respectively contain the main parts of the fan, permanent magnet generator, engine and muffler combination, the sound insulation function of the air duct itself and the above muffling structure can also reduce the noise of the generator assembly. .
  • the temperature of the main body of the two air ducts is high and the air duct itself is damaged.
  • the heat insulation and reflection film is attached to the local inner wall of the two air ducts with high combined temperature.
  • the sound insulation function of the two air duct combinations is improved, and a sound-absorbing structure and a sound-damping cotton are also produced at the inner and outer wall portions of the front and rear air duct combinations.
  • FIG. 1 is a schematic vertical sectional structure diagram of a crankshaft axis according to the patent of the present invention
  • Figure 2 is a perspective view of the perspective of Figure 1
  • 1 - generator front fan 2 - permanent magnet generator (including stator and rotor), 3 - including front cooling duct combination of parts 22, 23, 24, 4 engine, 5 - rear fan, 6 Rear air duct front cover, 7 rear air duct middle cover, 8-rear air duct rear cover, 9-muffler intake pipe, 10-muffler upper cavity, 11-muffler lower cavity, 12, 13-connecting pipe, 14-muffler Outlet, 15 front cooling duct row Tuyere, 16 rear cooling duct exhaust vents, 17 including rear cooling duct combinations of parts 6, 7, 8 , 18 including muffler combinations of parts 9, 10, 11, 12, 13, 14 , 19 - thermal insulation film 20—Muffling cotton, 21 silencer structure on the air duct, 22—forward windshield, 23 forward wind left cover, 24—forward wind right cover.
  • an engine-driven generator includes a generator front fan 1, a permanent magnet generator 2 (including a stator and a rotor),
  • the front cooling air duct combination 3, the engine 4, the rear fan 5 (note: in the present embodiment, the fan and the generator rear fan are the same fan), the rear cooling air duct combination 17, the muffler combination 18 and the like are mainly composed of components;
  • the air duct combination 3 contains the front fan 1, the permanent magnet generator 2, the upper portion of the cylinder of the engine 4, the muffler intake pipe 9 and the muffler upper chamber 10, and is cooled by the front fan 1 from the front opening of the front cooling air duct combination 3 Wind, cooling wind before the fan 1 boosts the speed, first surrounds the actual temperature and the minimum temperature of the permanent magnet generator 2, and then cools the part of the engine 4 that contains the highest combustion chamber - the
  • the use of the cooling air also reduces the heat transfer of the high temperature parts of the generator to the low temperature parts; the rear cooling air passage combination 17 utilizes the functions of the rear fan 5 and the rear air duct front cover 6 to force the air from the casing and the oil sump of the engine 4
  • the cooling chamber is also included in the lower chamber 11 of the supercharged cooling muffler.
  • the cooling air is also cooled in the lower half of the engine 4, and the lower portion of the muffler lower chamber 11 is cooled to effectively utilize the cooling air, but the cooling air duct combination 17 is cooled.
  • the number of components and the temperature are lower than the front cooling air duct combination 3, so the intake air volume of the front cooling air passage combination 3 is larger than the rear cooling air passage combination 17; the front cooling air passage combination 3 passes the fastener and the sealing belt with the engine 4 cylinder or more.
  • the partial phase set, the upper and lower chambers 10, 11 of the muffler are bolted to the engine 4 and the rear air duct front cover 6, and the rear lower connecting plate of the front cooling air duct combination 3 forms a front air duct exhaust port 15 and a rear air duct.
  • the partition of the tuyere 16 is divided in the middle; the present invention can pass the supercooled cooling air of the two fans 1 and 5 of the front and rear of the engine 4 through the front and rear two air passage combinations 3, 17 respectively to cool the permanent magnet generator 2, the engine 4,
  • the outer surface of the muffler assembly 18 greatly reduces the body temperature of the permanent magnet generator 2, the engine 4, the two-stage muffler assembly 18, and the muffler air outlet 14
  • the exhaust temperature at the location is beneficial to improve the noise reduction cooling effect of the generator assembly; at the same time, the main parts of the permanent magnet generator 2, the engine 4, and the muffler combination 18 are respectively accommodated due to the combination of the two air passages 3 and 17 respectively.
  • the sound insulation function of the air duct itself and the above-mentioned sound absorbing structure 20, 21 can also reduce the noise of the generator assembly.
  • the local air wall parts with higher temperature in the front and rear air ducts 3 and 17 are combined.
  • the heat insulating and reflecting film 19 is attached, and in order to improve the sound insulating function of the front and rear air duct combinations 3 and 17, a sound absorbing structure 21 and a sound absorbing cotton 20 are attached to the inner and outer walls of the front and rear air passage combinations 3 and 17.
  • the front cooling air is sucked into the forward hood 22 by the front fan 1 and pressurized, and sent to the front of the forward hood 22, the forward wind left cover 23, and the forward wind right cover 24.
  • the front duct cooling air first passes through the gap between the middle and the periphery of the permanent magnet generator 2, the outer surface of the engine 4 cylinder or more and the inner wall of the front cooling duct combination 3 to surround the cooling permanent magnet power generation.
  • the upper part of the cylinder of the engine 4 and then the gap between the muffler intake pipe 9 and the inner wall of the upper cavity 10 and the front cooling air duct combination 3 surrounds the cooling muffler intake pipe 9 and the upper cavity 10, the communication pipe 12, The upper half of the 13 is then discharged through the front air duct vent 15; the engine exhaust is silenced through the inner portion of the intake duct 9 and the upper chamber 10, and then enters the lower chamber of the muffler through the communicating tubes 12, 13 to silence the sound.
  • the muffler outlet 14 is discharged; the rear cooling fan is sucked into the cooling air from the side of the lower casing of the engine 4 and the bottom of the oil pan by the fan 5, and the wind cools the casing and the oil pan of the engine 4 while sucking, reducing The temperature of the engine, after
  • the road front cover 6 is an aluminum alloy structure and is bolted to the engine, which not only serves as a connection bearing for the air passage, the front and rear muffler lower chamber 11 and the rear air duct cover 7, but also serves to pass the heat of the engine through the mounting bolts and the connection.
  • the surface is transmitted to the rear air duct front cover 6 and then cooled by the cooling air to reduce the engine temperature; the rear fan 5 is in the middle of the rear air duct front cover 6 and the rear air duct middle cover 7, and the suction-cooled cooling air is sent into the rear.
  • the exhaust of the muffler is finally discharged from the muffler air outlet 14, the muffler air outlet 14 is contained by the rear air duct exhaust 16; because the engine 4 and the muffler combination 18 are high temperature components, in order to prevent their heat radiation caused by 2 Body temperature of the air duct combination 3, 17 High and cause damage to the air duct itself.
  • the part of the inner wall of the high temperature is attached with a heat-insulating reflective film 19, in order to improve the sound insulation of the two air duct combinations 3 and 17
  • the function has a sound absorbing structure 21 and a sound absorbing cotton 20 at a local position on the inner and outer walls of the front and rear air passage combinations 3, 17.
  • This design can flexibly divide the muffler into two cavities of different sizes and add various muffling structures to improve the muffling effect under the total volume of the same muffler, and also facilitate the arrangement of the two cavities of the muffler.
  • the vacant position around the generator can be used to increase the heat dissipation and reduce the total volume of the generator assembly.
  • the upper and lower cavity of the muffler and the front and rear air duct design increase the cost, but greatly improve the permanent magnet type.
  • the muffler cooling performance of the generator 2, the engine 4 and the muffler combination 18 can also reduce the final noise of the generator assembly due to the sound insulation function of the air duct and the sound insulation design and components on the air duct, especially for general purpose generators. It is suitable for applications such as fully enclosed engine generators where the total volume, exhaust temperature, and exhaust noise are critical.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

一种发动机驱动的发电机，包括有前风扇(1)、永磁式发电机(2)、前后风道组合(3，17)、发动机(4)、后风扇(5)、双段式消声器组合(18)等主要组件；前风道组合(3)包容前风扇(1)、永磁式发电机(2)、发动机(4)的气缸以上部分、消声器进气管(9)和上腔体(10)，后风道组合(17)包容后风扇(5)和后风道前、中、后罩(6，7，8)和消声器下腔体(11)。发动机(4)前、后风扇(1，5)的增压冷却风通过前后风道(3，17)，按温度由低至高逐次冷却永磁式发电机(2)、发动机(4)和双段式消声器上、下腔体(10，11)，从而降低了发电机总成的温度和排气噪音，同时由于前风道组合(3)与后风道组合(17)将发电机各部件包容后的隔音功能，也降低了发电机总成的系统噪音。

Description

发动机驱动的发电机 本申请要求于 2011年 9月 7日提交中国专利局、申请号为 201110288914.9、 发明名称为 "发动机用双风道双段式消声器的消声冷却结构 "的中国专利申请 的优先权， 以及于 2011 年 10 月 23 日提交中国专利局、 申请号为 201110348573.X, 发明名称为 "发动机驱动的发电机" 的中国专利申请的优先 权， 该两个在先申请的全部内容通过引用结合在本申请中。
技术领域 本发明涉及一种发动机驱动的发电机，具体的说是利用特别布置的前后冷 却风道来冷却发电机、 发动机、 消声器的发电机结构， 特别适用于对发电机、 发动机冷却消声效果要求高、体积要求小的发动机驱动的发电机，属于发电机 技术领域。
背景技术
以往，发动机驱动的发电机，大多的冷却是用单风扇把冷却气流从发电机、 发动机的一端通过包容发动机最热部分的风道输送到另一端仅冷却发电机和 发动机，但没有考虑到消声器的冷却； 也有的用一个风道将发动机和独立的消 声器一起包容冷却、 隔音降噪， 这种消声冷却结构有如： 中国实用新型专利号 为 ZL201020119577.1的专利所记载的 "一种具有消声器护罩的发动机结构"； 也有的发电机是用一个风道冷却发动机和消声器、一个风道冷却发电机， 这种 结构有如： 中国发明专利号为 ZL03121181.X的专利所记载的 "引擎发电机"。
但是， 这样的已有发电机结构存在的问题是： 仅冷却发动机就会造成消声 器很烫易伤人； 加冷消声器时， 为达到消声效果的要求， 消声器必须要有一个 较大的体积，使用中必须给消声器专门留一个大空间从而增大了发动机总成的 总体积， 这样就要求风扇大和风道复杂； 2个风道的结构中后风道先冷却温度 高的发动机再冷却发电机的结构，发电机处的进风温度就高且后续冷却风没有 被利用且消声器的容积不够大，在用于发动机冷却消声效果要求高、体积要求 小的发电机和全封闭发动机式发电机中难以满足各种标准日益提高的综合要 求。
发明内容 本发明的目的是克服现有技术中存在的不足，提供一种可以将排气消声器 分割成上下 2 个小体积腔体但总体积大于单独排气消声器并布置在发动机周 边空余位置，然后用发动机前后冷却风扇的 2股增压冷却气流按需要控制达到 冷却的部件工作温度高低，按实际温度最低的发电机先冷却、温度次低的发动 机再冷却，温度已逐步提高的冷却风最后分别输送到实际温度最高的排气消声 器 2个腔体进行冷却， 从而依次冷却发电机、 发动机、 进气管、 消声器， 控制 发动机和排气温度来降低发动机排气噪音 ,又通过风道的隔音性能达到降低发 电机总成最终噪音目的的结构； 同时由于风道、 消声器的双体式结构， 可以在 设计时灵活的把风道、 消声器部件布置在发电机周边可利用的空余空间，有利 于减少发电机系统的总体积。 案：
发动机驱动的发电机， 包括发电机前风扇、 发电机后风扇、 双冷却风道、 永磁式发电机、 发动机、 后风扇、 双段式上下消音腔体构成的消声器组合； 所述双冷却风道包括前冷却风道组合与后冷却风道组合；
所述前冷却风道组合包括前进风罩、 前进风左罩、 前进风右罩， 所述前进 风左罩、 前进风右罩呈左右结构， 所述前冷却风道组合包容了发电机前风扇、 永磁式发电机、 发动机的气缸以上部分、 消声器进气管和消声器上腔体， 冷却 风依次流向发电机前风扇、 永磁式发电机、 发动机的气缸和气缸盖以上部分、 消声器进气管、 消声器上腔体； 同时， 所述前进风罩、 前进风左罩及前进风右 罩通过紧固件和密封带与发动机气缸以上部分相套装，使得前冷却风形成独立 前冷却风通道，所述前冷却风通道是前冷却风道组合的内壁与前冷却风通道组 合所包容的发电机前风扇、 永磁式发电机、 发动机的气缸以上部分、 消声器进 气管、 消声器上腔体的外壁所形成的间隙；
所述后冷却风道组合包括后风道前罩、后风道中罩和后风道后罩， 所述后 冷却风道组合包容了发电机后风扇、 消声器下腔体， 冷却风依次流向发动机气 缸以下部分、 发电机后风扇、 消声器的下腔体； 同时， 所述后风道前罩、 后风 道中罩及后风道后罩呈前后依次排列， 并通过紧固件和密封带与发动机相套 装，使得后冷却风形成独立后冷却风通道， 所述后冷却风通道是后冷却风道组 合的内壁与后冷却风道组合所包容的发电机后风扇、消声器下腔体的外壁所形 成的间隙。
本发明的发动机驱动的发电机，发电机部件按冷却风流向看按照发电机前 风扇、 发电机后风扇、 永磁式发电机、 发动机、 后风扇、 消声器组合的前后次 序布置， 消声器组合包括有上下两个腔体和进气管、 连通管、 消声器出气口， 前冷却风道组合包容发电机前风扇、 永磁式发电机、 发动机的气缸以上部分、 消声器进气管和消声器上腔体部分； 后冷却风道组合从发动机的箱体、油底壳 处强制进风经后风扇吸风增压并包容消声器下腔体；前冷却风道组合通过紧固 件和密封带与发动机气缸以上部分相套装， 消声器的上下腔体与发动机、后风 道前罩用螺栓相连。本发明可以将发动机前后 2个风扇的增压冷却风通过前后 2个冷却风道组合分别环绕冷却永磁式发电机、 发动机、 双段式消声器的进气 管和上、 下两个腔体、 连通管的外表面， 大大降低了永磁式发电机、 发动机、 双段式消声器组合的本体温度和消声器出气口处的排气温度，有利于提高发电 机总成的消声冷却效果。
同时， 由于前后 2个冷却风道组合分别将风扇、 永磁式发电机、 发动机、 消声器组合的主要部分包容，风道自身的隔音功能和上面的消声结构也可以降 低发电机总成的噪音。
为了防止发动机、消声器组合自身的热辐射可能造成前后 2个风道组合本 体温度高而造成风道自身损坏，在前后 2个风道组合温度较高的局部内壁部位 贴有隔热反射膜， 为了提高前后 2个风道组合的隔音功能， 在前、 后风道组合 的内外壁局部位置还制造有消音结构和贴有消音棉。
附图说明 本发明专利有如下附图：
图 1是本发明专利的按曲轴轴线垂直剖面结构示意图
图 2是图 1的立体局部透视示意图
图中： 1一发电机前风扇， 2—永磁式发电机（含定子和转子）， 3—包括件 22、 23、 24 的前冷却风道组合， 4一发动机， 5—后风扇， 6 后风道前罩， 7 后风道中罩， 8—后风道后罩， 9一消声器进气管， 10—消声器上腔体， 11 一消声器下腔体， 12、 13—连通管， 14一消声器出气口， 15 前冷却风道排 风口， 16 后冷却风道排风口， 17 包括件 6、 7、 8 的后冷却风道组合， 18 包括件 9、 10、 11、 12、 13、 14的消声器组合， 19—隔热反射膜， 20—消音 棉， 21 风道上的消音结构， 22—前进风罩， 23 前进风左罩， 24—前进风右 罩。
具体实施方式
下面参照附图说明本发明的具体实施方案： 如附图 1、 附图 2所示， 发动 机驱动的发电机， 包括有发电机前风扇 1、 永磁式发电机 2 (含定子和转子）、 前冷却风道组合 3、 发动机 4、 后风扇 5 (注： 在本实施方案中该风扇与发电 机后风扇为同一风扇）、 后冷却风道组合 17、 消声器组合 18等主要组件组成； 前冷却风道组合 3包容前风扇 1、永磁式发电机 2、发动机 4的气缸以上部分、 消声器进气管 9和消声器上腔体 10, 由前风扇 1从前冷却风道组合 3的前开 口处吸入冷却风，冷却风经前风扇 1增压提速后先环绕冷却实际温度和要求控 制温度最低的永磁式发电机 2, 然后再冷却发动机 4中温度最高的包容了燃烧 室的部分——发动机 4的气缸以上部分，再冷却整套系统温度最高的部分—— 消声器进气管 9和消声器上腔体 10, 最后经前风道排风口 15排出， 这样设计 使冷却风以低向高逐次冷却部件温度从低到高的部件，冷却风在冷却一个部件 后温度逐次提高但逐次去冷却温度更高的部件，使冷却风始终和被冷却件保持 一定的温度差， 4艮好的利用了冷却风也减少了发电机高温件传热给低温件； 后 冷却风道组合 17利用后风扇 5和后风道前罩 6的功能从发动机 4的箱体、 油 底壳处强制进风并包容增压冷却消声器下腔体 11 , 冷却风也是先冷却温度低 的发动机 4下半部再冷却温度高的消声器下腔体 11以有效利用冷却风， 但因 为后冷却风道组合 17要冷却的部件数量和温度低于前冷却风道组合 3 , 所以 前冷却风道组合 3的进风量大于后冷却风道组合 17; 前冷却风道组合 3通过 紧固件和密封带与发动机 4气缸以上部分相套装， 消声器的上下腔体 10、 11 与发动机 4、 后风道前罩 6用螺栓相连， 前冷却风道组合 3的后下连接板形成 将前风道排风口 15、 后风道排风口 16中间分隔的隔板； 本发明可以将发动机 4前后 2个风扇 1、 5的增压冷却风通过前后 2个风道组合 3、 17分别逐次环 绕冷却永磁式发电机 2、 发动机 4、 消声器组合 18的外表面， 大大降低了永磁 式发电机 2、 发动机 4、 双段式消声器组合 18的本体温度和消声器出气口 14 处的排气温度，有利于提高发电机总成的消声冷却效果； 同时由于前后 2个风 道组合 3、 17分别将永磁式发电机 2、 发动机 4、 消声器组合 18的主要部分包 容， 风道自身的隔音功能和上面的消声结构 20、 21也可以降低发电机总成的 噪音。 为了防止发动机 4、 消声器组合 18 自身的热辐射可能造成前后 2个风 道组合 3、 17本体温度高而造成风道自身损坏， 在前后 2个风道组合 3、 17 温度较高的局部内壁部位贴有隔热反射膜 19, 为了提高前后 2个风道组合 3、 17的隔音功能， 在前、 后风道组合 3、 17的内外壁局部位置还有消音结构 21 和贴有消音棉 20。
在如附图所示的具体实施方案中， 前冷却风被前风扇 1吸入前进风罩 22 并增压后送至由前进风罩 22、前进风左罩 23 , 前进风右罩 24组成的前冷却风 道组合 3 中， 前风道冷却风先通过永磁式发电机 2的中间和周边、 发动机 4 气缸以上部分外表面和前冷却风道组合 3 内壁之间的间隙环绕冷却永磁式发 电机 2、 发动机 4的气缸以上部分， 然后再经过消声器进气管 9和上腔体 10 与前冷却风道组合 3 内壁之间的间隙环绕冷却消声器进气管 9和上腔体 10、 连通管 12、 13的上半部， 然后经前风道排风口 15排出； 发动机排气经过进气 管 9和上腔体 10内腔消声， 然后通过连通管 12、 13进入消声器下腔体 11消 声后经消声器出气口 14排出； 后冷却风被后风扇 5从发动机 4下箱体侧面、 油底壳底部吸入冷却进风， 风在吸入的同时也冷却了发动机 4 的箱体和油底 壳，降低了发动机的温度，后风道前罩 6是铝合金结构与发动机通过螺栓连接， 既起到了风道、 前后连接消声器下腔体 11和后风道中罩 7的连接承载作用， 又起到了把发动机的热量通过安装螺栓和连接面传递到后风道前罩 6 然后被 冷却风冷却降低发动机温度的作用； 后风扇 5在后风道前罩 6和后风道中罩 7 中间，吸入增压后的冷却风被送入由后风道中罩 7、后风道后罩 8之间的空间 , 该空间中安装有需要冷却消声的消声器下腔体 11 , 消声器下腔体 11外表面与 后风道中罩 7、 后风道后罩 8之间除安装点外均有间隙， 后冷却风从消声器下 腔体 11周边间隙间通过并冷却消声器下腔体 11、 连通管 12、 13的下半部后 从后风道排风口 16排出， 消声器的排气也最终从消声器出气口 14排出， 消声 器出气口 14被后风道排风口 16包容； 因为发动机 4、 消声器组合 18均为高 温部件， 为了防止他们的热辐射造成前后 2个风道组合 3、 17的部件本体温度 高而造成风道自身损坏，在如图所示前后 2个风道组合 3、 17温度较高的局部 内壁部位贴有隔热反射膜 19, 为了提高前后 2个风道组合 3、 17的隔音功能， 在前、后风道组合 3、 17的内外壁局部位置还有消音结构 21和贴有消音棉 20。 这种设计可以灵活的把消声器分割成大小不一的 2 个腔体并增加各种消声结 构以提高在同一消声器总体积下的消声效果，又有利于把消声器的 2个腔体布 置在发电机周边可以利用的空余位置并增大外表面积以提高散热，减少发电机 总成的总体积； 消声器的上下腔体和前后风道设计虽然增加了一定的成本，但 大大提高了永磁式发电机 2、 发动机 4和消声器组合 18的消声冷却性能， 还 因为风道的隔声功能和风道上面的隔声设计和部件，也可以降低发电机总成的 最终噪音， 特别对通用发电机和全封闭发动机式发电机这类对总体积、排气温 度、 排气噪音要求严的场合非常适用。

Claims

权 利 要 求
1、 一种发动机驱动的发电机， 其特征是， 包括发电机前风扇、 发电机后 风扇、 双冷却风道、 永磁式发电机、 发动机、 后风扇、 双段式上下消音腔体构 成的消声器组合；
所述双冷却风道包括前冷却风道组合与后冷却风道组合；
所述前冷却风道组合包括前进风罩、 前进风左罩、 前进风右罩， 所述前进 风左罩、 前进风右罩呈左右结构， 所述前冷却风道组合包容了发电机前风扇、 永磁式发电机、 发动机的气缸以上部分、 消声器进气管和消声器上腔体， 冷却 风依次流向发电机前风扇、 永磁式发电机、 发动机的气缸和气缸盖以上部分、 消声器进气管、 消声器上腔体； 同时， 所述前进风罩、 前进风左罩及前进风右 罩通过紧固件和密封带与发动机气缸以上部分相套装，使得前冷却风形成独立 前冷却风通道，所述前冷却风通道是前冷却风道组合的内壁与前冷却风通道组 合所包容的发电机前风扇、 永磁式发电机、 发动机的气缸以上部分、 消声器进 气管、 消声器上腔体的外壁所形成的间隙；
所述后冷却风道组合包括后风道前罩、后风道中罩和后风道后罩， 所述后 冷却风道组合包容了发电机后风扇、 消声器下腔体， 冷却风依次流向发动机气 缸以下部分、 发电机后风扇、 消声器的下腔体； 同时， 所述后风道前罩、 后风 道中罩及后风道后罩呈前后依次排列， 并通过紧固件和密封带与发动机相套 装，使得后冷却风形成独立后冷却风通道， 所述后冷却风通道是后冷却风道组 合的内壁与后冷却风道组合所包容的发电机后风扇、消声器下腔体的外壁所形 成的间隙。
2、 根据权利要求 1所述的发动机驱动的发电机， 其特征是， 双段式上下 消音腔体构成的消声器组合的上下消音腔体用一根或多根连通管连接 ,消声器 出气口在下消音腔体上。
3、 根据权利要求 1所述的发动机驱动的发电机， 其特征是， 双冷却风道 的最终出风部位设置有分隔板，使双冷却风道的前冷却风通道与后冷却风通道 互不相通， 冷却风流向均为从前向后。
4、 根据权利要求 3所述的发动机驱动的发电机， 其特征是， 双冷却风道 在温度较高的局部部位贴有隔热反射膜。
5、 根据权利要求 1所述的发动机驱动的发电机， 其特征是， 发电机前风 扇、发电机后风扇与发动机曲轴共轴， 前冷却风通道的进风量大于后冷却风通 道。
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