WO2014205984A1 - Centrifugal ventilation unit for cooling traction motor of high-speed electric multiple unit - Google Patents

Centrifugal ventilation unit for cooling traction motor of high-speed electric multiple unit Download PDF

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Publication number
WO2014205984A1
WO2014205984A1 PCT/CN2013/087376 CN2013087376W WO2014205984A1 WO 2014205984 A1 WO2014205984 A1 WO 2014205984A1 CN 2013087376 W CN2013087376 W CN 2013087376W WO 2014205984 A1 WO2014205984 A1 WO 2014205984A1
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WO
WIPO (PCT)
Prior art keywords
motor
shaft
fan impeller
volute
cooling
Prior art date
Application number
PCT/CN2013/087376
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French (fr)
Chinese (zh)
Inventor
李廷金
李瑜
李俊
Original Assignee
中国北车集团大连机车研究所有限公司
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Application filed by 中国北车集团大连机车研究所有限公司 filed Critical 中国北车集团大连机车研究所有限公司
Publication of WO2014205984A1 publication Critical patent/WO2014205984A1/en

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Classifications

    • 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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven

Definitions

  • the present invention relates to the field of fluid machinery, and more particularly to a centrifugal ventilating unit for cooling a high speed EMU traction motor. Background technique
  • Each of the trains of each type of high-speed EMU carries two traction motors.
  • the traction motors are distributed at the two ends of the interlayer between the bottom of the moving car and the floor of the passenger compartment, and are in the middle of the train, leaving only two traction motors.
  • Cooling and ventilation units are installed in a very small space on the side. Based on this, in order to meet the cooling motor needs, the required ventilation unit must have the characteristics of small size, strong ventilation capacity and high static pressure.
  • each rated unit has a rated flow of 0.5 m 3 /s and a static pressure of not less than 1400 Pa to overcome the traction motor resistance and meet the requirements.
  • Traction motor cooling is required;
  • the fan sound power level noise is required to be no more than 90dB and the weight is not more than 50kg.
  • a centrifugal ventilating unit for cooling a high-speed EMU traction motor is provided.
  • the existing ventilation unit such as low efficiency, insufficient supercharging capacity and heavy parts, it provides a set of high efficiency, high reliability, simple and compact structure, low noise ventilation unit to meet the high-speed EMU traction motor. Cooling is needed.
  • a centrifugal ventilating unit for cooling a high-speed EMU traction motor comprising a current collector, a flange, a fan impeller, a volute, a shaft plate and an electric motor, wherein: the current collector is fixed to the worm by a flange a side of the end plate of the casing; the volute is fixed to the motor; the fan impeller disposed in the volute is fixed to the shaft; the shaft is provided with a motor of the motor The shaft is matched to a mounting hole, and the shaft is fixed to the motor.
  • the intake passage of the current collector is a scaled intake passage
  • the intake passage of the current collector is composed of a gas rapid acceleration section and a gas buffer section, the gas rapid acceleration section and the gas buffer section.
  • the gas buffering section is connected to the arc of the tapered front disc of the fan impeller, and the arc axial ratio of the gas rapid acceleration section and the gas buffer section is 1: 8-1 : 5.
  • the gas rapid acceleration section and the gas buffer section of the intake passage of the above-mentioned current collector are composed of two circular arcs instead of the conventional cylindrical, conical, single circular arc and conical arc structures.
  • the inlet passage of the current collector adopts a circular arc-shaped line structure to form a scaled smooth inlet passage, which gradually transforms the airflow from rapid acceleration operation to deceleration operation, and adjusts the flow direction of the airflow to reduce the flow of the collector.
  • the collector inlet passage and the end plate are connected by a small radius arc, which can eliminate the local vortex of the intake caused by the conventional intake mode and reduce the loss; on the other hand, the airflow can be made in a small occupied space.
  • the collector function of the collector is completed, and sufficient space is left for the rear section of the intake passage to stabilize the stability of the gas flow field entering the fan impeller 3.
  • the two arcs of the gas rapid acceleration section and the gas buffer section occupy the axial space and are allocated between 1:8 and 1:5.
  • the remaining space allocation scheme can also be appropriately selected according to the actual situation, and is not limited thereto.
  • a gap is provided between the gas buffer section of the current collector and the fan impeller, and the gap is 1% to 3% of the diameter of the inlet end of the gas buffer section of the current collector, and the tail end The inlet is the minimum inlet diameter of the gas buffer section.
  • the axial dimension of the flange can be selected according to the actual situation.
  • the flange is mainly used to connect the transition and eliminate the axial deviation caused by the machining error of the tapered hole of the shaft and the tapered shaft of the motor. Pneumatically, the enclosed small space can suppress the formation of eddy currents outside the current collector.
  • the gap between the current collector and the fan impeller is about 1% to 3% of the minimum inlet diameter of the collector, and a part of the gas coming out of the fan impeller is returned to the inside of the fan impeller through the gap. A vortex zone is formed in front of the gap.
  • reducing the annular diameter of the flange can effectively suppress the development of the eddy current zone and reduce the loss.
  • the fan impeller is composed of a tapered curved front disc, a rearward vane and a rear disc, and the number of the rearward vanes is 7-13.
  • the tapered curved front disc can reduce the rate of change of the flow passage area of the fan impeller, and make the flow passage area more uniform with the flow line, which can effectively suppress the vortex area inside the fan impeller and improve the efficiency of the fan.
  • Backward Blade fans are more efficient than radial and forward blade fans and have a wide range of applications.
  • the use of 7-13 blades is mainly to better avoid the resonance and improve the reliability of the fan. As a preference, the effect is better when 9 blades are used.
  • the end of the shaft plate near the fan impeller is machined with a thread for removing the fan impeller;
  • the mounting hole on the shaft plate is a tapered hole matching the motor shaft of the motor, the shaft plate It is fixed to the motor shaft of the motor by bolts and lock washers.
  • the traditional shaft plate has a very thick shaft near the end of the fan impeller.
  • the middle screw hole is used to fasten the fan impeller, and the other two screw holes are used to disassemble the fan impeller and lock.
  • the shaft plate of the present invention only needs to machine a screw hole for fastening the fan impeller, which can greatly reduce the journal and reduce the weight of the shaft.
  • the tapered hole machined on the shaft plate is fully matched with the tapered shaft of the motor (the thrust surface is not provided on the motor shaft, and it is completely positioned by the tapered surface). This fit ensures the balance quality of the fan impeller.
  • the machining errors of the tapered bore and the tapered shaft in the present invention are accumulated in the axial direction, and finally adjusted by the flanges of different axial dimensions.
  • the fan impeller is integrated with the shaft disc, and the splicing process is adopted to eliminate the leakage loss caused by the shaft disc and improve the volumetric efficiency; on the other hand, the smaller shaft disc can be used to reduce the weight of the impeller.
  • At least two ribs for frequency modulation are provided on the rear side plate fixed to the motor by the volute.
  • the volute Due to the limitation of the installation space, the volute must be designed to be very small, which is far from the size of the common fan volute, which seriously affects the overall performance of the fan.
  • the volute profile is finally determined by three-dimensional flow field calculation, which can minimize the eddy current generation in the normal working range of the fan and improve the working efficiency of the fan.
  • the front and rear side plates of the volute are suitable for 3mm steel plate.
  • the ribs are set so that the fan does not exhibit a resonant frequency in the range of 0 to 20 Hz and 50 Hz ⁇ 5 Hz.
  • the invention Compared with the prior art, the invention has the advantages of high efficiency, high reliability, simple and compact structure, low noise, etc., and meets the cooling requirements of the traction motor of the high-speed EMU.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a rear elevational view of the present invention.
  • Current collector 2 flange 3, fan impeller 4, bolt 5, lock washer 6, volute 7, shaft disc 8, electric motor 9, rib I 10, rib II
  • a centrifugal ventilating unit for cooling the traction motor of a high-speed EMU includes a current collector 1, a flange 2, a fan impeller 3, a volute 6, a shaft plate 7, and an electric motor 8.
  • the intake passage of the current collector 1 is a scaled intake passage, and the intake passage of the current collector 1 is composed of a gas rapid acceleration section and a gas buffer section, and the gas rapid acceleration section and the gas buffer section are configured.
  • a circular arc-shaped line transition structure, the gas buffering section is connected with a tapered arc-shaped front disk arc of the fan impeller 3, and an arc axial ratio of the gas rapid acceleration section and the gas buffer section is 1 :8-1:5.
  • a gap is provided between the gas buffer section of the current collector 1 and the fan impeller 3, and the gap is 1% to 3% of the diameter of the inlet end of the gas buffer section of the current collector 1.
  • the fan impeller 3 is composed of a tapered curved front disc, a rear vane and a rear disc, and the number of the rear vanes is 7-13 pieces.
  • the shaft 7 is adjacent to one end of the fan impeller 3 to machine a thread for removing the fan impeller; the mounting hole on the shaft 7 is a tapered hole matching the motor shaft of the motor 8.
  • the current collector 1 is fixed to the end plate side of the volute 6 by a flange 2; the volute 6 is fixed to the motor 8 by bolts; the fan disposed in the volute 6
  • the impeller 3 is spliced and fixed to the shaft plate 7 to form a unitary body; the shaft ⁇ is fixed to the motor shaft of the motor 8 by bolts 4 and a lock washer 5.
  • the volute 6 and the rear side plate fixed to the motor 8 are provided with a rib I 9 and a rib II 10 for frequency modulation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A centrifugal ventilation unit for cooling a traction motor of a high-speed electric multiple unit comprises a collector (1), a flange (2), a fan impeller (3), a volute (6), a shaft disc (7), and an electric motor (8). The collector (1) is fixed at a side of an end plate of the volute (6) through the flange (2); the volute (6)is fixed on the electric motor (8); the fan impeller (3) disposed in the volute (6) is fixed with the shaft disc (7); the shaft disc (7) is provided with a mounting hole fitting with a motor shaft of the electric motor (8), and the shaft disc (7) is fixedly connected with the electric motor(8). This apparatus solves problems of an insufficient static pressure and overload without changing the size of the product, thereby meeting a technical requirement on running of a traction motor of a high-speed electric multiple unit, and improving performance and reliability of the traction motor.

Description

说 明 书 高速动车组牵引电机冷却用的离心通风机组 技术领域  Description Centrifugal ventilation unit for high-speed EMU traction motor cooling
本发明涉及流体机械领域， 具体地说是一种高速动车组牵引电机冷却用的 离心通风机组。 背景技术  The present invention relates to the field of fluid machinery, and more particularly to a centrifugal ventilating unit for cooling a high speed EMU traction motor. Background technique
每列某型高速动车组的每节动车上都分别携带两台牵引电机， 牵引电机分 布在动车车底和乘客车厢地板之间的夹层的两端， 且处于列车中间位置， 只剩 牵引电机两侧非常狭小的空间安装冷却通风机组。 基于此， 为满足牵引电机冷 却需要， 要求配套的通风机组必须具有尺寸小、 通风能力强、 静压高的特点。  Each of the trains of each type of high-speed EMU carries two traction motors. The traction motors are distributed at the two ends of the interlayer between the bottom of the moving car and the floor of the passenger compartment, and are in the middle of the train, leaving only two traction motors. Cooling and ventilation units are installed in a very small space on the side. Based on this, in order to meet the cooling motor needs, the required ventilation unit must have the characteristics of small size, strong ventilation capacity and high static pressure.
目前， 现有技术中设计技术要求一台牵引电机匹配两台通风机组， 每台通 风机组标态下的额定流量 0.5m3/s， 静压不低于 1400Pa， 以克服牵引电机阻力， 并满足牵引电机冷却需要； 另外， 要求风机声功率级噪音不高于 90dB， 重量不 超过 50kg。 为解决上述设计要求， 需提供一种通风机组能在满足外形尺寸不变 的前提下， 解决静压不足、 重量超限的难题， 从而提高牵引电机的性能和可靠 性。 发明内容 At present, the prior art design technology requires that one traction motor be matched with two ventilation units, each rated unit has a rated flow of 0.5 m 3 /s and a static pressure of not less than 1400 Pa to overcome the traction motor resistance and meet the requirements. Traction motor cooling is required; In addition, the fan sound power level noise is required to be no more than 90dB and the weight is not more than 50kg. In order to solve the above design requirements, it is necessary to provide a ventilation unit capable of solving the problem of insufficient static pressure and excess weight under the premise of satisfying the same size, thereby improving the performance and reliability of the traction motor. Summary of the invention
根据上述提出的技术问题， 而提供一种高速动车组牵引电机冷却用的离心 通风机组。 主要针对现有通风机组效率偏低、 增压能力不足、 零部件笨重等缺 陷， 而提供一套效率高、 可靠性高、 结构简单紧凑、 噪音低的通风机组， 以满 足高速动车组牵引电机的冷却需要。  According to the above-mentioned technical problems, a centrifugal ventilating unit for cooling a high-speed EMU traction motor is provided. Mainly for the shortcomings of the existing ventilation unit, such as low efficiency, insufficient supercharging capacity and heavy parts, it provides a set of high efficiency, high reliability, simple and compact structure, low noise ventilation unit to meet the high-speed EMU traction motor. Cooling is needed.
本发明采用的技术手段如下：  The technical means adopted by the present invention are as follows:
一种高速动车组牵引电机冷却用的离心通风机组， 包括集流器、 法兰、 风 机叶轮、 蜗壳、 轴盘和电动机， 其特征在于： 所述集流器通过法兰固定在所述 蜗壳的端板一侧； 所述蜗壳固定在所述电动机上； 设置在所述蜗壳内的所述风 机叶轮与所述轴盘固定； 所述轴盘上设有与所述电动机的电机轴相匹配的安装 孔， 所述轴盘与所述电动机固定。 作为优选， 所述集流器的进气通道为縮放式进气通道， 所述集流器的进气 通道由气体快速加速段和气体缓冲段， 所述气体快速加速段和所述气体缓冲段 构成圆弧形型线过渡结构， 所述气体缓冲段与所述风机叶轮的锥形前盘圆弧过 渡连接， 所述气体快速加速段和所述气体缓冲段的圆弧轴向比为 1 :8-1 :5。 A centrifugal ventilating unit for cooling a high-speed EMU traction motor, comprising a current collector, a flange, a fan impeller, a volute, a shaft plate and an electric motor, wherein: the current collector is fixed to the worm by a flange a side of the end plate of the casing; the volute is fixed to the motor; the fan impeller disposed in the volute is fixed to the shaft; the shaft is provided with a motor of the motor The shaft is matched to a mounting hole, and the shaft is fixed to the motor. Preferably, the intake passage of the current collector is a scaled intake passage, and the intake passage of the current collector is composed of a gas rapid acceleration section and a gas buffer section, the gas rapid acceleration section and the gas buffer section. Forming a circular arc-shaped line transition structure, the gas buffering section is connected to the arc of the tapered front disc of the fan impeller, and the arc axial ratio of the gas rapid acceleration section and the gas buffer section is 1: 8-1 : 5.
上述的集流器的进气通道的气体快速加速段和气体缓冲段由两段圆弧构 成， 以替代传统的筒形、 锥形、 单圆弧形和锥弧形结构。 集流器的进气通道采 用圆弧形型线构造， 形成縮放式光滑进气通道， 该通道使气流从快速加速运行 逐渐转变为减速运行， 且调整气流流动方向， 可降低因集流器出口面积与风机 叶轮进口面积差引起的涡流损失； 该圆弧形型线与风机叶轮的锥弧形前盘轮盖 配合， 可使集流器的縮放式流道与风机叶轮的扩张式流道形成较好的过渡连接， 进一歩限制在风机叶轮进口处形成的涡流， 降低涡流损失； 在集流器的出气端 采用半径较大的圆弧过渡能够使气体流场变化缓慢， 确保流场稳定。 集流器进 气通道与端板之间采用半径较小圆弧连接， 一方面能够消除传统进气方式引起 的进气局部涡流， 降低损失； 另一方面能够在占用空间小的情况下使气流达到 相同的速度， 完成集流器的集气功能， 并为进气通道后段留下足够空间， 以稳 定确保进入风机叶轮 3 的气体流场的稳定性。 气体快速加速段和气体缓冲段的 两段圆弧占据轴向空间按 1 :8〜1 :5之间分配， 其余空间分配方案也可根据实际 情况适当选择， 并不局限于此。  The gas rapid acceleration section and the gas buffer section of the intake passage of the above-mentioned current collector are composed of two circular arcs instead of the conventional cylindrical, conical, single circular arc and conical arc structures. The inlet passage of the current collector adopts a circular arc-shaped line structure to form a scaled smooth inlet passage, which gradually transforms the airflow from rapid acceleration operation to deceleration operation, and adjusts the flow direction of the airflow to reduce the flow of the collector. The eddy current loss caused by the difference between the area and the inlet area of the fan impeller; the circular arc-shaped line cooperates with the tapered curved front wheel cover of the fan impeller to form the scaled flow path of the current collector and the expanded flow path of the fan impeller A better transitional connection, further restricting the eddy current formed at the inlet of the fan impeller, reducing the eddy current loss; using a circular arc with a larger radius at the outlet end of the current collector can make the gas flow field change slowly and ensure the flow field is stable. The collector inlet passage and the end plate are connected by a small radius arc, which can eliminate the local vortex of the intake caused by the conventional intake mode and reduce the loss; on the other hand, the airflow can be made in a small occupied space. At the same speed, the collector function of the collector is completed, and sufficient space is left for the rear section of the intake passage to stabilize the stability of the gas flow field entering the fan impeller 3. The two arcs of the gas rapid acceleration section and the gas buffer section occupy the axial space and are allocated between 1:8 and 1:5. The remaining space allocation scheme can also be appropriately selected according to the actual situation, and is not limited thereto.
作为优选， 所述集流器的气体缓冲段与所述风机叶轮之间设有间隙， 所述 间隙为所述集流器的气体缓冲段的尾端进口直径的 1%-3%， 尾端进口处是指气 体缓冲段的最小进口直径处。  Preferably, a gap is provided between the gas buffer section of the current collector and the fan impeller, and the gap is 1% to 3% of the diameter of the inlet end of the gas buffer section of the current collector, and the tail end The inlet is the minimum inlet diameter of the gas buffer section.
法兰的轴向尺寸可根据实际情况采用多种选择， 法兰在结构上主要起连接 过渡作用和消除轴盘的锥形孔和电动机的锥形轴的加工误差造成的轴向偏离。 在气动上， 封闭的小空间能够抑制集流器外部形成涡流。 集流器与风机叶轮之 间设置的间隙， 其大小约为集流器最小进口直径的 1%-3%， 从风机叶轮出来的 气体有一部分会通过该间隙回流到风机叶轮内部， 而在该间隙前面形成一涡流 区。 另外， 减小法兰的环形直径， 能够有效抑制涡流区的发展， 降低损失。  The axial dimension of the flange can be selected according to the actual situation. The flange is mainly used to connect the transition and eliminate the axial deviation caused by the machining error of the tapered hole of the shaft and the tapered shaft of the motor. Pneumatically, the enclosed small space can suppress the formation of eddy currents outside the current collector. The gap between the current collector and the fan impeller is about 1% to 3% of the minimum inlet diameter of the collector, and a part of the gas coming out of the fan impeller is returned to the inside of the fan impeller through the gap. A vortex zone is formed in front of the gap. In addition, reducing the annular diameter of the flange can effectively suppress the development of the eddy current zone and reduce the loss.
作为优选， 所述风机叶轮由锥弧形前盘、 后向叶片和后盘组成， 所述后向 叶片的片数为 7-13片。  Preferably, the fan impeller is composed of a tapered curved front disc, a rearward vane and a rear disc, and the number of the rearward vanes is 7-13.
锥弧形前盘能够减缓风机叶轮内部流道通流面积的变化率， 使流道面积随 流线变化更均匀， 能够有效抑制风机叶轮内部的涡流区， 提高风机效率。 后向 叶片风机比径向和前向叶片风机效率高， 可用范围宽。 采用 7-13片叶片主要是 能够更好地避开谐振， 提高风机可靠性， 作为优选， 采用 9片叶片时的效果更 好。 The tapered curved front disc can reduce the rate of change of the flow passage area of the fan impeller, and make the flow passage area more uniform with the flow line, which can effectively suppress the vortex area inside the fan impeller and improve the efficiency of the fan. Backward Blade fans are more efficient than radial and forward blade fans and have a wide range of applications. The use of 7-13 blades is mainly to better avoid the resonance and improve the reliability of the fan. As a preference, the effect is better when 9 blades are used.
作为优选， 所述轴盘靠近所述风机叶轮的一端加工有用于拆卸风机叶轮的 螺紋； 所述轴盘上的安装孔为与所述电动机的电机轴相匹配的锥形孔， 所述轴 盘通过螺栓和锁紧垫片固定在所述电动机的电机轴上。  Preferably, the end of the shaft plate near the fan impeller is machined with a thread for removing the fan impeller; the mounting hole on the shaft plate is a tapered hole matching the motor shaft of the motor, the shaft plate It is fixed to the motor shaft of the motor by bolts and lock washers.
传统的轴盘靠近风机叶轮一端留有一个很粗的轴， 在轴端面上加工有 3 个 螺孔， 中间螺孔供紧固风机叶轮用， 另两个螺孔则供拆卸风机叶轮以及锁紧轴 端螺栓用。 而本发明的轴盘则只需要加工一个紧固风机叶轮用得螺孔， 可以大 大縮小轴颈， 减轻轴盘重量。 轴盘上加工有的锥形孔与电动机的锥形轴完全配 合 （电机轴上不设止推面， 完全靠锥形面定位）， 该配合能确保风机叶轮动平衡 质量。 另外， 本发明中的锥形孔和锥形轴的加工误差累计到轴向， 最终由不同 轴向尺寸的法兰来调整消除。 再有， 风机叶轮与轴盘悍接成一体， 采用悍接工 艺， 一方面消除轴盘引起的泄漏损失， 提高容积效率； 另一方面可以采用较小 的轴盘， 减轻叶轮重量。  The traditional shaft plate has a very thick shaft near the end of the fan impeller. There are 3 screw holes on the shaft end face. The middle screw hole is used to fasten the fan impeller, and the other two screw holes are used to disassemble the fan impeller and lock. For shaft end bolts. However, the shaft plate of the present invention only needs to machine a screw hole for fastening the fan impeller, which can greatly reduce the journal and reduce the weight of the shaft. The tapered hole machined on the shaft plate is fully matched with the tapered shaft of the motor (the thrust surface is not provided on the motor shaft, and it is completely positioned by the tapered surface). This fit ensures the balance quality of the fan impeller. In addition, the machining errors of the tapered bore and the tapered shaft in the present invention are accumulated in the axial direction, and finally adjusted by the flanges of different axial dimensions. Furthermore, the fan impeller is integrated with the shaft disc, and the splicing process is adopted to eliminate the leakage loss caused by the shaft disc and improve the volumetric efficiency; on the other hand, the smaller shaft disc can be used to reduce the weight of the impeller.
作为优选， 所述蜗壳与所述电机固定的后侧板上至少设有 2个用于调频的 加强筋。  Preferably, at least two ribs for frequency modulation are provided on the rear side plate fixed to the motor by the volute.
由于受安装空间限制， 蜗壳必须设计得很小巧， 与常用风机蜗壳尺寸相去 甚远， 严重影响风机整体性能。 蜗壳外型线通过三维流场计算最终确定， 能够 最大限度地抑制风机正常工作范围内的涡流生成， 提高风机工作效率。 为了保 证冷却通风机组重量符合要求， 通过三维应力强度校核计算， 蜗壳的前后侧板 采用 3mm的钢板为宜。 设置加强筋是为了使风机在 0〜20Hz和 50Hz± 5Hz范 围内不出现共振频率。  Due to the limitation of the installation space, the volute must be designed to be very small, which is far from the size of the common fan volute, which seriously affects the overall performance of the fan. The volute profile is finally determined by three-dimensional flow field calculation, which can minimize the eddy current generation in the normal working range of the fan and improve the working efficiency of the fan. In order to ensure that the weight of the cooling and ventilation unit meets the requirements, the 3D stress strength check calculation, the front and rear side plates of the volute are suitable for 3mm steel plate. The ribs are set so that the fan does not exhibit a resonant frequency in the range of 0 to 20 Hz and 50 Hz ± 5 Hz.
较现有技术相比， 本发明具效率高、 可靠性高、 结构简单紧凑、 噪音低等 优点， 以满足高速动车组牵引电机的冷却需要。  Compared with the prior art, the invention has the advantages of high efficiency, high reliability, simple and compact structure, low noise, etc., and meets the cooling requirements of the traction motor of the high-speed EMU.
基于上述理由本发明可在动车组牵引电机冷却领域广泛推广。 附图说明  Based on the above reasons, the present invention can be widely promoted in the field of EMU traction motor cooling. DRAWINGS
下面结合附图和具体实施方式对本发明作进一歩详细的说明。  The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
图 1是本发明的结构示意图。  Figure 1 is a schematic view of the structure of the present invention.
图 2是本发明的后视图。 图中： 1、 集流器 2、 法兰 3、 风机叶轮 4、 螺栓 5、 锁紧垫片 6、 蜗壳 7、 轴盘 8、 电动机 9、 加强筋 I 10、 加强筋 II 具体实施方式 Figure 2 is a rear elevational view of the present invention. In the figure: 1. Current collector 2, flange 3, fan impeller 4, bolt 5, lock washer 6, volute 7, shaft disc 8, electric motor 9, rib I 10, rib II
如图 1， 图 2所示， 一种高速动车组牵引电机冷却用的离心通风机组， 包括 集流器 1、 法兰 2、 风机叶轮 3、 蜗壳 6、 轴盘 7和电动机 8。 所述集流器 1的进 气通道为縮放式进气通道， 所述集流器 1 的进气通道由气体快速加速段和气体 缓冲段， 所述气体快速加速段和所述气体缓冲段构成圆弧形型线过渡结构， 所 述气体缓冲段与所述风机叶轮 3 的锥弧形前盘圆弧过渡连接， 所述气体快速加 速段和所述气体缓冲段的圆弧轴向比为 1:8-1:5。 所述集流器 1 的气体缓冲段与 所述风机叶轮 3之间设有间隙， 所述间隙为所述集流器 1 的气体缓冲段的尾端 进口直径的 1%-3%。 所述风机叶轮 3 由锥弧形前盘、 后向叶片和后盘组成， 所 述后向叶片的片数为 7-13片。 所述轴盘 7靠近所述风机叶轮 3的一端加工有用 于拆卸风机叶轮的螺紋； 所述轴盘 7上的安装孔为与所述电动机 8的电机轴相 匹配的锥形孔。  As shown in Fig. 1, Fig. 2, a centrifugal ventilating unit for cooling the traction motor of a high-speed EMU includes a current collector 1, a flange 2, a fan impeller 3, a volute 6, a shaft plate 7, and an electric motor 8. The intake passage of the current collector 1 is a scaled intake passage, and the intake passage of the current collector 1 is composed of a gas rapid acceleration section and a gas buffer section, and the gas rapid acceleration section and the gas buffer section are configured. a circular arc-shaped line transition structure, the gas buffering section is connected with a tapered arc-shaped front disk arc of the fan impeller 3, and an arc axial ratio of the gas rapid acceleration section and the gas buffer section is 1 :8-1:5. A gap is provided between the gas buffer section of the current collector 1 and the fan impeller 3, and the gap is 1% to 3% of the diameter of the inlet end of the gas buffer section of the current collector 1. The fan impeller 3 is composed of a tapered curved front disc, a rear vane and a rear disc, and the number of the rear vanes is 7-13 pieces. The shaft 7 is adjacent to one end of the fan impeller 3 to machine a thread for removing the fan impeller; the mounting hole on the shaft 7 is a tapered hole matching the motor shaft of the motor 8.
所述集流器 1通过法兰 2固定在所述蜗壳 6的端板一侧； 所述蜗壳 6通过 螺栓固定在所述电动机 8上； 设置在所述蜗壳 6内的所述风机叶轮 3与所述轴 盘 7悍接固定， 形成一个整体； 所述轴盘 Ί通过螺栓 4和锁紧垫片 5固定在所 述电动机 8的电机轴上。 所述蜗壳 6与所述电动机 8固定的后侧板上设有用于 调频的加强筋 I 9和加强筋 II 10。  The current collector 1 is fixed to the end plate side of the volute 6 by a flange 2; the volute 6 is fixed to the motor 8 by bolts; the fan disposed in the volute 6 The impeller 3 is spliced and fixed to the shaft plate 7 to form a unitary body; the shaft Ί is fixed to the motor shaft of the motor 8 by bolts 4 and a lock washer 5. The volute 6 and the rear side plate fixed to the motor 8 are provided with a rib I 9 and a rib II 10 for frequency modulation.
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并不局 限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 根据本 发明的技术方案及其发明构思加以等同替换或改变， 都应涵盖在本发明的保护 范围之内。  The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims

权 利 要 求 书 claims
1、 一种高速动车组牵引电机冷却用的离心通风机组， 包括集流器 （1)、 法 兰 （2)、 风机叶轮 （3)、 蜗壳 （6)、 轴盘 （7) 和电动机 （8)， 其特征在于： 所 述集流器 （1) 通过法兰 （2) 固定在所述蜗壳 （6) 的端板一侧； 所述蜗壳 （6) 固定在所述电动机 （8) 上； 设置在所述蜗壳 （6) 内的所述风机叶轮 （3) 与所 述轴盘 （7) 固定； 所述轴盘 （7) 上设有与所述电动机 （8) 的电机轴相匹配的 安装孔， 所述轴盘 （7) 与所述电动机 （8) 固定。 1. A centrifugal ventilation unit for cooling high-speed EMU traction motors, including a collector (1), a flange (2), a fan impeller (3), a volute (6), a shaft plate (7) and an electric motor ( 8), characterized in that: the current collector (1) is fixed on one side of the end plate of the volute (6) through a flange (2); the volute (6) is fixed on the motor (8 ); the fan impeller (3) provided in the volute (6) is fixed to the shaft disk (7); the shaft disk (7) is provided with a motor connected to the motor (8) The mounting holes match the shaft, and the shaft plate (7) is fixed to the motor (8).
2、 根据权利要求 1所述的高速动车组牵引电机冷却用的离心通风机组， 其 特征在于： 所述集流器 （1) 的进气通道为縮放式进气通道， 所述集流器 （1) 的进气通道由气体快速加速段和气体缓冲段， 所述气体快速加速段和所述气体 缓冲段构成圆弧形型线过渡结构， 所述气体缓冲段与所述风机叶轮（3) 的锥弧 形前盘圆弧过渡连接， 所述气体快速加速段和所述气体缓冲段的圆弧轴向比为 1:8-1:5。 2. The centrifugal ventilation unit for cooling the traction motor of a high-speed EMU according to claim 1, characterized in that: the air inlet channel of the current collector (1) is a scaling air inlet channel, and the current collector (1) 1) The air inlet channel is composed of a gas rapid acceleration section and a gas buffer section. The gas rapid acceleration section and the gas buffer section form an arc-shaped line transition structure. The gas buffer section and the fan impeller (3) The conical arc-shaped front disk is connected by arc transition, and the arc axial ratio of the gas rapid acceleration section and the gas buffer section is 1:8-1:5.
3、 根据权利要求 2所述的高速动车组牵引电机冷却用的离心通风机组， 其 特征在于： 所述集流器 （1) 的气体缓冲段与所述风机叶轮 （3) 之间设有间隙， 所述间隙为所述集流器 （1) 的气体缓冲段的尾端进口直径的 1%-3%。 3. The centrifugal ventilation unit for cooling the traction motor of a high-speed EMU according to claim 2, characterized in that: there is a gap between the gas buffer section of the current collector (1) and the fan impeller (3) , the gap is 1%-3% of the inlet diameter of the rear end of the gas buffer section of the current collector (1).
4、 根据权利要求 1所述的高速动车组牵引电机冷却用的离心通风机组， 其 特征在于： 所述风机叶轮 （3) 由锥弧形前盘、 后向叶片和后盘组成， 所述后向 叶片的片数为 7-13片。 4. The centrifugal ventilation unit for cooling the traction motor of a high-speed EMU according to claim 1, characterized in that: the fan impeller (3) is composed of a tapered arc front disk, a backward blade and a rear disk, and the rear disk The number of blades is 7-13.
5、 根据权利要求 1所述的高速动车组牵引电机冷却用的离心通风机组， 其 特征在于： 所述轴盘 （7) 靠近所述风机叶轮 （3) 的一端加工有用于拆卸风机 叶轮的螺紋； 所述轴盘 （7) 上的安装孔为与所述电动机 （8) 的电机轴相匹配 的锥形孔， 所述轴盘（7)通过螺栓（4)和锁紧垫片（5)固定在所述电动机（8) 的电机轴上。 5. The centrifugal ventilation unit for cooling the traction motor of a high-speed EMU according to claim 1, characterized in that: one end of the shaft plate (7) close to the fan impeller (3) is processed with a thread for disassembling the fan impeller. ; The mounting hole on the shaft plate (7) is a tapered hole that matches the motor shaft of the motor (8), and the shaft plate (7) is secured by bolts (4) and locking washers (5) Fixed on the motor shaft of the motor (8).
6、 根据权利要求 1所述的高速动车组牵引电机冷却用的离心通风机组， 其 特征在于： 所述蜗壳 （6) 与所述电动机 （8) 固定的后侧板上至少设有 2个用 于调频的加强筋。 6. The centrifugal ventilation unit for cooling the traction motor of a high-speed EMU according to claim 1, wherein It is characterized in that: at least two reinforcement ribs for frequency modulation are provided on the rear side plate where the volute (6) and the motor (8) are fixed.
PCT/CN2013/087376 2013-06-28 2013-11-19 Centrifugal ventilation unit for cooling traction motor of high-speed electric multiple unit WO2014205984A1 (en)

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