WO2015135235A1 - Electric locomotive grounding device and arc suppression method - Google Patents
Electric locomotive grounding device and arc suppression method Download PDFInfo
- Publication number
- WO2015135235A1 WO2015135235A1 PCT/CN2014/075366 CN2014075366W WO2015135235A1 WO 2015135235 A1 WO2015135235 A1 WO 2015135235A1 CN 2014075366 W CN2014075366 W CN 2014075366W WO 2015135235 A1 WO2015135235 A1 WO 2015135235A1
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- WO
- WIPO (PCT)
- Prior art keywords
- carbon brush
- brush
- grounding
- arc
- carbon
- Prior art date
Links
- 230000003137 locomotive effect Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001629 suppression Effects 0.000 title abstract 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 156
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 156
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 77
- 229910052802 copper Inorganic materials 0.000 claims abstract description 77
- 239000010949 copper Substances 0.000 claims abstract description 77
- 244000185238 Lophostemon confertus Species 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F15/00—Axle-boxes
- B61F15/20—Details
- B61F15/28—Axle-boxes modified to ensure electrical conductivity
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
- H02K11/026—Suppressors associated with brushes, brush holders or their supports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
Definitions
- the present invention relates to the field of grounding devices, and more particularly to a grounding device and an arc extinguishing method for use on an electric locomotive.
- the rail electric locomotive uses the grounding device to introduce the current of the electric locomotive from the power receiving end to the earth through the axle, the wheel and the rail to ensure the normal operation of the rail electric locomotive.
- the working principle of the railroad electric locomotive grounding device is to make a current flow through the two through a relatively fixed carbon brush in contact with the friction copper disk on the rotating axle.
- a pressing force is generally applied to the carbon brush by the spring.
- the service life (wear consumption) of carbon brushes and friction copper discs is closely related to the material properties of the two, as well as the relative displacement between them and the pressing force applied to ensure close contact between the two.
- the pressing force is constant, the greater the relative displacement between the two (the longer the path of the carbon brush on the end face of the friction copper disk), the greater the wear of the carbon brush and the friction copper disk per unit time, the service life The shorter the difference between the carbon brush and the friction copper disk, the greater the applied pressing force, the greater the wear of the carbon brush and the friction copper disk per unit time, and the shorter the service life;
- the tightening force is constant, the closer to the outer edge of the friction copper disk surface, the greater the wear amount; when the relative displacement of the carbon brush and the friction copper disk is constant, the smaller the applied pressing force is, the carbon brush and the friction copper plate per unit time.
- Rail electric locomotives operate from thousands of volts to tens of kilovolts and operate at tens of amps To hundreds of amps.
- the grounding device does not generate a large amount of heat due to the current flowing through several tens of amps to hundreds of amps, causing abrupt temperature rise, the lubrication state between the carbon brush and the friction copper plate is rapidly deteriorated, and the lubrication state is greatly reduced.
- the service life of the grounding device requires that the grounding device should have a small resistance and contact resistance.
- the total resistance of the working grounding device is generally only a few milliohms, and the resulting voltage drop is only a few volts.
- the resistance and contact resistance of the currently used grounding device fully meet the requirements for operation under the above-mentioned high current conditions.
- the rail electric locomotive will inevitably bump and vibrate during operation. Since the pressing force exerted on the carbon brush is a certain value, if the vibration intensity is large enough, the carbon brush and the friction copper disc will still be separated.
- the circuit that communicates with the friction copper disk through the carbon brush is in an open state, and the voltage between the carbon brush and the friction copper disk immediately jumps to several thousand volts to several tens of kilovolts, that is, the work of the railroad electric locomotive. The voltage is fully applied between the carbon brush of the grounding device and the friction copper plate.
- the object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide an arc extinguishing method for an electric locomotive grounding device, which avoids electric ablation of the electric locomotive grounding device under strong vibration conditions, and ensures electrical conductivity of the electric locomotive grounding device. , to extend its service life.
- An electric locomotive grounding device comprises a brush box, a brush holder fixed in the brush box and a carbon brush arranged on the brush holder, wherein the carbon brush end is connected with the brush holder through a soft wire, and the brush holder is provided with a cable connection for conducting electricity
- the carbon brush disposed on the brush holder includes a grounding carbon brush and an arc extinguishing carbon brush, and the grounding carbon brush and the arc extinguishing carbon brush are disposed between the bottom of the brush holder and the circular brushing copper disk.
- the arc extinguishing method for the grounding device of the electric locomotive includes: between the grounding carbon brush and the friction copper plate, applying different pressures between the arc extinguishing carbon brush and the friction copper plate, respectively, between the grounding carbon brush and the friction copper plate The pressure is less than the pressure between the arc-cut carbon brush and the friction copper plate.
- the pressure applied between the grounding carbon brush (31) and the friction copper disk is greater than 10 kPa and less than 40 kPa, and the pressure applied between the arc extinguishing carbon brush (32) and the friction copper disk is greater than lOkPa is less than 40 kPa.
- the above is applied between the grounded carbon brush (31) and the friction copper disk, and the pressure between the arc extinguishing carbon brush (32) and the friction copper disk is referred to the mechanical industry standard JB/T4003-2001 "Motor brushes".
- the center of the brush holder is provided with a hole, and the arc extinguishing carbon brush is installed in the hole in the center of the brush holder, and the plurality of grounding carbon brushes are evenly disposed on the circumference centered on the center of the brush holder.
- the arc-extinguishing carbon brush is installed in the center of the brush holder to minimize the relative displacement of the arc-cut carbon brush and the friction copper plate, reduce the wear amount and enhance the service life.
- the arc-cut carbon brush can be installed at other positions of the brush holder.
- the grounding carbon brushes are provided at least two, and are evenly disposed on a circumference centered on the center of the brush holder.
- a stainless steel constant force spring is provided between the bottom of the grounding carbon brush and the brush holder to make the ground carbon brush head and the circular friction copper disk in close contact; between the bottom of the arc extinguishing carbon brush and the brush holder A compression spring is provided which brings the arc extinguishing carbon brush head into close contact with the circular friction copper disk.
- the ends of the grounding carbon brush and the arc extinguishing carbon brush are respectively connected to the brush holder through a soft wire, and the grounding carbon brush provides a first path for the grounding current, and the arc extinguishing carbon brush provides the grounding current. Two pathways.
- the grounding carbon brush has higher conductivity than the arc extinguishing carbon brush, and the grounding carbon brush with relatively better conductivity is beneficial to controlling the heat generated by the working current flowing through the carbon brush to avoid occurrence. Burnt.
- the wear resistance of the arc extinguishing carbon brush is higher than that of the grounded carbon brush, and the arc extinguishing carbon brush with relatively better wear resistance is beneficial for controlling the friction under relatively greater pressure.
- the arc extinguishing method of the grounding device of the electric locomotive of the present invention is applied to the grounding carbon brush and the friction copper disk.
- the pressure between them is less than the pressure applied between the arc-cut carbon brush and the friction copper plate, so that a small pressing force is applied between the ground carbon brush and the friction copper plate to ensure that the ground carbon brush and the friction copper disk are relatively large.
- the invention provides a grounding carbon brush and an arc extinguishing carbon brush in different regions of the brush holder, and simultaneously between the grounding carbon brush and the friction copper plate, the arc extinguishing carbon brush and the friction Different pressures are applied between the copper plates to achieve a long service life of the grounded carbon brush, and the grounding device can be prevented from being separated between the grounded carbon brush and the friction copper plate under strong vibration conditions.
- the grounding device can be prevented from being separated between the grounded carbon brush and the friction copper plate under strong vibration conditions.
- the arc is burned, which causes the friction surface to deteriorate and the service life of the two is greatly shortened.
- FIG. 1 is a schematic structural view of a grounding device for an electric locomotive according to the present invention.
- Figure 2 is a side view of Figure 1.
- the grounding device for an electric locomotive of the present embodiment includes a brush box 1, a brush holder 2 fixed in the brush box 1, and a ground carbon brush 31 and an arc extinguishing carbon brush 32 disposed on the brush holder.
- the ends of the grounding carbon brush 31 and the arc extinguishing carbon brush 32 are connected to the brush holder 2 through a flexible wire.
- the brush holder 2 is provided with a cable terminal for conducting electricity, and the center of the brush holder 2 is provided with a hole, and the arc extinguishing carbon brush 32 is installed in the hole in the center of the brush holder, and the three grounding carbon brushes 31 are evenly disposed on the circumference centered on the center of the brush holder 2.
- the grounding carbon brush 31 is disposed between the bottom of the grounding carbon brush 31 and the brush holder 2.
- a stainless steel constant force spring 41 in which the head is in close contact with the circular friction copper disk;
- a compression spring is provided between the bottom of the arc extinguishing carbon brush 32 and the brush holder 2 to closely contact the head of the arc extinguishing carbon brush 32 with the circular friction copper disk.
- the specific arc extinguishing method of the electric locomotive grounding device is as follows: between the grounding carbon brush 31 and the friction copper disk, different pressures are applied between the arc extinguishing carbon brush 32 and the friction copper disk, respectively, and are applied to the grounding carbon brush 31 and The pressure between the friction copper disks is less than the pressure between the arc extinguishing carbon brush 32 and the friction copper disk.
- the grounding carbon brush 31 has higher conductivity than the arc extinguishing carbon brush 32, and the grounding carbon brush 31 having relatively better conductive performance is beneficial for controlling the heat generated by the working current flowing through the carbon brush to avoid burning; the arc extinguishing carbon brush 32
- the wear resistance is higher than that of the ground carbon brush 31, and the arc extinguishing carbon brush 32 having a relatively better wear resistance is advantageous for controlling the amount of wear generated by the relative friction with the friction copper disk under relatively large pressure.
- grounding carbon brushes 31 are uniformly disposed on the circumference centered on the center of the brush holder 2, an arc extinguishing carbon brush 32 is additionally installed in the center hole of the brush holder 2, and when the grounding device is operated, the grounding carbon brush 31 is applied.
- the pressure between the friction copper discs is less than the pressure applied between the arc extinguishing carbon brushes 32 and the friction copper discs. Applying a small pressing force between the grounded carbon brush 31 and the friction copper plate ensures that only a small amount of wear is generated when the ground carbon brush 31 and the friction copper disk are relatively moved relative to each other, and the service life of the ground carbon brush is enhanced.
Abstract
A grounding device and arc suppression method used on an electric locomotive, the carbon brushes arranged on the brush holder (2) in the grounding device comprising grounding carbon brushes (31) and an arc suppression carbon brush (32); the bottoms of the grounding carbon brushes (31) and arc suppression carbon brush (32) and the brush holder (2) having arranged therebetween a spring causing the carbon brush heads and a circular friction copper disk to be in intimate contact with each other. The arc suppression method comprises the pressure applied between the grounding carbon brushes (31) and the friction copper disk being less than the pressure applied between the arc suppression carbon brushes (32) and the friction copper disk. By using the described grounding device and arc suppression method, one not only prolongs the service life of the grounding carbon brushes, but also prevents, under operating conditions of intense vibration, arcing and burning occurring as a result of high voltage produced between the grounding carbon brushes and the friction copper disk after separation of said carbon brushes and copper disk.
Description
电力机车接地装置及消弧方法 Electric locomotive grounding device and arc extinguishing method
技术领域 Technical field
本发明涉及接地装置领域， 尤其涉及一种电力机车上使用的接地装置和消 弧方法。 The present invention relates to the field of grounding devices, and more particularly to a grounding device and an arc extinguishing method for use on an electric locomotive.
背景技术 Background technique
有轨电力机车通过接地装置将电力机车由受电端导入的电流， 经车轴、 车 轮、 钢轨导入大地， 保证有轨电力机车正常工作。 有轨电力机车接地装置的工 作原理是通过相对位置固定的碳刷与旋转车轴上的摩擦铜盘相接触，使电流流 经二者形成回路。为了确保相对位置固定的碳刷与旋转车轴上的摩擦铜盘之间 紧密接触， 一般通过弹簧对碳刷施加压紧力得以实现。 The rail electric locomotive uses the grounding device to introduce the current of the electric locomotive from the power receiving end to the earth through the axle, the wheel and the rail to ensure the normal operation of the rail electric locomotive. The working principle of the railroad electric locomotive grounding device is to make a current flow through the two through a relatively fixed carbon brush in contact with the friction copper disk on the rotating axle. In order to ensure a close contact between the relatively fixed carbon brush and the friction copper disk on the rotating axle, a pressing force is generally applied to the carbon brush by the spring.
碳刷与摩擦铜盘的使用寿命（磨耗量） 除了与二者的选材属性有关外， 还 与二者之间的相对位移量， 以及确保二者紧密接触而施加的压紧力密切相关。 当压紧力一定时， 二者之间的相对位移量越大（碳刷在摩擦铜盘端面上行走的 路径越长）， 单位时间内碳刷与摩擦铜盘的磨耗量越大， 使用寿命越短； 当碳 刷与摩擦铜盘的相对位移量一定时， 所施加的压紧力越大， 单位时间内碳刷与 摩擦铜盘的磨耗量越大， 使用寿命越短； 反之， 当压紧力一定时， 越靠近摩擦 铜盘面的外边沿磨耗量越大； 当碳刷与摩擦铜盘的相对位移量一定时， 所施加 的压紧力越小， 单位时间内碳刷与摩擦铜盘的磨耗量越小， 使用寿命越长。 为 了确保有轨电力机车能够在一定期间内正常工作不停运检修，要求碳刷与摩擦 铜盘具有足够长的使用寿命， 这就要求在碳刷上施加的压紧力不易过大， 处于 一定合理范围。 The service life (wear consumption) of carbon brushes and friction copper discs is closely related to the material properties of the two, as well as the relative displacement between them and the pressing force applied to ensure close contact between the two. When the pressing force is constant, the greater the relative displacement between the two (the longer the path of the carbon brush on the end face of the friction copper disk), the greater the wear of the carbon brush and the friction copper disk per unit time, the service life The shorter the difference between the carbon brush and the friction copper disk, the greater the applied pressing force, the greater the wear of the carbon brush and the friction copper disk per unit time, and the shorter the service life; When the tightening force is constant, the closer to the outer edge of the friction copper disk surface, the greater the wear amount; when the relative displacement of the carbon brush and the friction copper disk is constant, the smaller the applied pressing force is, the carbon brush and the friction copper plate per unit time. The smaller the wear, the longer the service life. In order to ensure that the rail electric locomotive can work normally for a certain period of time without stopping the maintenance, the carbon brush and the friction copper disc are required to have a long enough service life, which requires that the pressing force exerted on the carbon brush is not too large, and is in a certain state. Reasonable range.
有轨电力机车的工作电压为数千伏特至数十千伏特，工作电流为数十安培
至数百安培。为了确保接地装置正常工作时不会由于数十安培至数百安培的电 流流经而产生大量热导致急剧温升发生烧蚀，导致碳刷与摩擦铜盘之间的润滑 状态迅速恶化， 大幅降低接地装置的使用寿命， 要求接地装置应具有较小的电 阻与接触电阻， 正常工作的接地装置的总电阻值一般只有数毫欧姆， 产生的电 压降也仅为数伏特。在静止状态下， 目前使用的接地装置的电阻与接触电阻完 全满足在上述大电流工况下工作的要求。但是， 有轨电力机车在运行过程不可 避免会发生颠簸并产生振动， 由于在碳刷上施加的压紧力为一确定值， 如果振 动强度足够大， 仍会导致碳刷与摩擦铜盘分离， 此时通过碳刷与摩擦铜盘接触 而连通的电路就处于断路状态，碳刷与摩擦铜盘之间的电压会立刻跃迁到数千 伏特至数十千伏特，也就是有轨电力机车的工作电压全部加载到接地装置的碳 刷与摩擦铜盘之间。在强烈振动状态下分离的碳刷与摩擦铜盘之间的距离非常 小， 二者之间又存在如此高的电压， 在此条件下极易产生电弧发生烧蚀， 导致 碳刷与摩擦铜盘之间的润滑状态迅速恶化， 大幅降低接地装置的使用寿命。 因 此， 为了降低碳刷与摩擦铜盘在振动状态下发生分离， 需要加大二者之间的压 紧力， 而加大压紧力又会增大碳刷与摩擦铜盘的磨耗， 缩短接地装置的使用寿 命。 由此可见， 延长碳刷与摩擦铜盘的使用寿命， 和消除二者之间产生电弧常 处于相互对立的矛盾面， 减小压紧力虽然可以延长使用寿命， 但会增大产生电 弧的可能， 反之增大压力可以降低产生电弧的可能， 却会缩短使用寿命。 Rail electric locomotives operate from thousands of volts to tens of kilovolts and operate at tens of amps To hundreds of amps. In order to ensure that the grounding device does not generate a large amount of heat due to the current flowing through several tens of amps to hundreds of amps, causing abrupt temperature rise, the lubrication state between the carbon brush and the friction copper plate is rapidly deteriorated, and the lubrication state is greatly reduced. The service life of the grounding device requires that the grounding device should have a small resistance and contact resistance. The total resistance of the working grounding device is generally only a few milliohms, and the resulting voltage drop is only a few volts. In the static state, the resistance and contact resistance of the currently used grounding device fully meet the requirements for operation under the above-mentioned high current conditions. However, the rail electric locomotive will inevitably bump and vibrate during operation. Since the pressing force exerted on the carbon brush is a certain value, if the vibration intensity is large enough, the carbon brush and the friction copper disc will still be separated. At this time, the circuit that communicates with the friction copper disk through the carbon brush is in an open state, and the voltage between the carbon brush and the friction copper disk immediately jumps to several thousand volts to several tens of kilovolts, that is, the work of the railroad electric locomotive. The voltage is fully applied between the carbon brush of the grounding device and the friction copper plate. The distance between the carbon brush and the friction copper disk separated under strong vibration is very small, and there is such a high voltage between them. Under this condition, the arc is easily ablated, resulting in a carbon brush and a friction copper disk. The lubrication state between them deteriorates rapidly, greatly reducing the service life of the grounding device. Therefore, in order to reduce the separation of the carbon brush and the friction copper disk under vibration, it is necessary to increase the pressing force between the two, and increasing the pressing force increases the wear of the carbon brush and the friction copper disk, and shortens the grounding. The service life of the device. It can be seen that extending the service life of the carbon brush and the friction copper disk and eliminating the arc between the two are often in contradiction. The reduction of the pressing force can prolong the service life, but the possibility of arcing is increased. Conversely, increasing the pressure can reduce the possibility of arcing, but it will shorten the service life.
发明内容 Summary of the invention
本发明的目的在于克服现有技术的上述不足， 提供一种电力机车接地装置 的消弧方法， 避免电力机车接地装置在强烈振动工况下产生拉电烧蚀， 保证了 电力机车接地装置导电性能， 延长其使用寿命。 The object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide an arc extinguishing method for an electric locomotive grounding device, which avoids electric ablation of the electric locomotive grounding device under strong vibration conditions, and ensures electrical conductivity of the electric locomotive grounding device. , to extend its service life.
为实现上述目的， 本发明提供了以下技术方案：
一种电力机车接地装置， 包括刷盒、 固定于刷盒内的刷架以及设置在刷架 上的碳刷， 碳刷末端通过软线与刷架连接， 刷架上设有用于导电的电缆接线端 子， 设置在刷架上的碳刷包括接地碳刷和消弧碳刷， 接地碳刷和消弧碳刷的底 部与刷架之间都设置有使碳刷头部与圆形摩擦铜盘紧密接触的弹簧。 To achieve the above object, the present invention provides the following technical solutions: An electric locomotive grounding device comprises a brush box, a brush holder fixed in the brush box and a carbon brush arranged on the brush holder, wherein the carbon brush end is connected with the brush holder through a soft wire, and the brush holder is provided with a cable connection for conducting electricity The carbon brush disposed on the brush holder includes a grounding carbon brush and an arc extinguishing carbon brush, and the grounding carbon brush and the arc extinguishing carbon brush are disposed between the bottom of the brush holder and the circular brushing copper disk. Contact spring.
上述电力机车接地装置的消弧方法， 包括： 在接地碳刷与摩擦铜盘之间， 消弧碳刷与摩擦铜盘之间分别施加不同的压力，施加在接地碳刷与摩擦铜盘之 间的压力小于消弧碳刷与摩擦铜盘之间的压力。 The arc extinguishing method for the grounding device of the electric locomotive includes: between the grounding carbon brush and the friction copper plate, applying different pressures between the arc extinguishing carbon brush and the friction copper plate, respectively, between the grounding carbon brush and the friction copper plate The pressure is less than the pressure between the arc-cut carbon brush and the friction copper plate.
上述电力机车接地装置的消弧方法中， 施加在接地碳刷 （31 )与摩擦铜盘 之间的压力大于 lOkPa小于 40kPa， 施加在消弧碳刷 （32 ) 与摩擦铜盘之间的 压力大于 lOkPa小于 40kPa。 上述施加在接地碳刷 （31 ) 与摩擦铜盘之间， 消 弧碳刷 （32 ) 与摩擦铜盘之间的压力参考机械行业标准 JB/T4003-2001 《电机 用电刷》。 In the arc extinguishing method of the electric locomotive grounding device, the pressure applied between the grounding carbon brush (31) and the friction copper disk is greater than 10 kPa and less than 40 kPa, and the pressure applied between the arc extinguishing carbon brush (32) and the friction copper disk is greater than lOkPa is less than 40 kPa. The above is applied between the grounded carbon brush (31) and the friction copper disk, and the pressure between the arc extinguishing carbon brush (32) and the friction copper disk is referred to the mechanical industry standard JB/T4003-2001 "Motor brushes".
上述电力机车接地装置中， 所述刷架的中心设置有孔， 消弧碳刷安装在刷 架中心的孔内， 多个接地碳刷均匀设置在以刷架中心为圆心的圆周上。 消弧碳 刷安装在刷架的中心， 可以尽量减少消弧碳刷与摩擦铜盘的相对位移量， 降低 磨耗量， 增强使用寿命， 另外消弧碳刷也可安装于刷架的其它位置。 In the electric locomotive grounding device, the center of the brush holder is provided with a hole, and the arc extinguishing carbon brush is installed in the hole in the center of the brush holder, and the plurality of grounding carbon brushes are evenly disposed on the circumference centered on the center of the brush holder. The arc-extinguishing carbon brush is installed in the center of the brush holder to minimize the relative displacement of the arc-cut carbon brush and the friction copper plate, reduce the wear amount and enhance the service life. In addition, the arc-cut carbon brush can be installed at other positions of the brush holder.
上述电力机车接地装置中， 所述接地碳刷至少设置两个， 且均匀设置在以 刷架中心为圆心的圆周上。 In the above electric locomotive grounding device, the grounding carbon brushes are provided at least two, and are evenly disposed on a circumference centered on the center of the brush holder.
上述电力机车接地装置中，所述接地碳刷底部与刷架之间设置有使接地碳 刷头部与圆形摩擦铜盘紧密接触的不锈钢恒力弹簧；消弧碳刷底部与刷架之间 设置有使消弧碳刷头部与圆形摩擦铜盘紧密接触的压缩弹簧。 In the electric locomotive grounding device, a stainless steel constant force spring is provided between the bottom of the grounding carbon brush and the brush holder to make the ground carbon brush head and the circular friction copper disk in close contact; between the bottom of the arc extinguishing carbon brush and the brush holder A compression spring is provided which brings the arc extinguishing carbon brush head into close contact with the circular friction copper disk.
上述电力机车接地装置中，所述接地碳刷和消弧碳刷的末端分别通过软线 与刷架连接， 接地碳刷为接地电流提供第一通路， 消弧碳刷为接地电流提供第
二通路。 In the above grounding device of the electric locomotive, the ends of the grounding carbon brush and the arc extinguishing carbon brush are respectively connected to the brush holder through a soft wire, and the grounding carbon brush provides a first path for the grounding current, and the arc extinguishing carbon brush provides the grounding current. Two pathways.
上述电力机车接地装置的消弧方法中，所述接地碳刷的导电性高于消弧碳 刷， 导电性能相对更好的接地碳刷有利于控制工作电流流经碳刷的发热量， 避 免发生烧损。 In the arc extinguishing method of the grounding device of the electric locomotive, the grounding carbon brush has higher conductivity than the arc extinguishing carbon brush, and the grounding carbon brush with relatively better conductivity is beneficial to controlling the heat generated by the working current flowing through the carbon brush to avoid occurrence. Burnt.
上述电力机车接地装置的消弧方法中，所述消弧碳刷的耐磨性高于接地碳 刷，耐磨性能相对更好的消弧碳刷有利于控制在相对更大的压力下与摩擦铜盘 相接触并发生相对运动而产生的磨耗量。 In the arc extinguishing method of the electric locomotive grounding device, the wear resistance of the arc extinguishing carbon brush is higher than that of the grounded carbon brush, and the arc extinguishing carbon brush with relatively better wear resistance is beneficial for controlling the friction under relatively greater pressure. The amount of wear caused by the copper discs coming into contact with each other and causing relative motion.
由于接地碳刷与摩擦铜盘之间的相对运动量大于消弧碳刷与摩擦铜盘之 间的相对运动量， 因此本发明电力机车接地装置的消弧方法中施加在接地碳刷 与摩擦铜盘之间的压力要小于施加在消弧碳刷与摩擦铜盘之间的压力，这样接 地碳刷与摩擦铜盘之间施加较小的压紧力可确保接地碳刷与摩擦铜盘发生较 大量相对运动时也只产生较小的磨耗量， 增强接地碳刷的使用寿命； 消弧碳刷 与摩擦铜盘之间施加较大的压紧力可确保在强烈振动工况下消弧碳刷与摩擦 铜盘也不会发生分离。如此即便接地碳刷与摩擦铜盘因振动等原因发生瞬间接 触不良，也能通过消弧碳刷对其灭弧，避免接地装置产生电弧而发生烧蚀现象。 Since the relative movement between the grounded carbon brush and the friction copper disk is greater than the relative movement between the arc extinguishing carbon brush and the friction copper disk, the arc extinguishing method of the grounding device of the electric locomotive of the present invention is applied to the grounding carbon brush and the friction copper disk. The pressure between them is less than the pressure applied between the arc-cut carbon brush and the friction copper plate, so that a small pressing force is applied between the ground carbon brush and the friction copper plate to ensure that the ground carbon brush and the friction copper disk are relatively large. Only a small amount of wear is generated during exercise to enhance the service life of the grounded carbon brush; a large pressing force is applied between the arc extinguishing carbon brush and the friction copper plate to ensure arc extinguishing carbon brush and friction under strong vibration conditions. The copper plate will not separate. Therefore, even if the grounded carbon brush and the friction copper disk are in poor contact due to vibration or the like, the arc can be extinguished by the arc extinguishing carbon brush to avoid arcing of the grounding device and ablation.
与现有技术相比，本发明的有益效果： 本发明通过在刷架的不同区域设置 接地碳刷和消弧碳刷， 同时对接地碳刷与摩擦铜盘之间， 消弧碳刷与摩擦铜盘 之间分别施加大小不同的压力， 从而实现接地碳刷既具有较长使用寿命， 又能 避免接地装置在强烈振动工况下由于接地碳刷与摩擦铜盘分离后，二者之间产 生高电压发生起弧烧损，导致摩擦面恶化从而大幅缩短二者使用寿命的情况发 生。 Compared with the prior art, the beneficial effects of the invention: The invention provides a grounding carbon brush and an arc extinguishing carbon brush in different regions of the brush holder, and simultaneously between the grounding carbon brush and the friction copper plate, the arc extinguishing carbon brush and the friction Different pressures are applied between the copper plates to achieve a long service life of the grounded carbon brush, and the grounding device can be prevented from being separated between the grounded carbon brush and the friction copper plate under strong vibration conditions. When a high voltage occurs, the arc is burned, which causes the friction surface to deteriorate and the service life of the two is greatly shortened.
附图说明 DRAWINGS
图 1为本发明中电力机车接地装置的结构示意图。
图 2为图 1的侧视图。 1 is a schematic structural view of a grounding device for an electric locomotive according to the present invention. Figure 2 is a side view of Figure 1.
图中标记： 1-刷盒， 2-刷架， 31-接地碳刷， 32-消弧碳刷， 41-不锈钢恒 力弹簧， 42-压缩弹簧。 具体实施方式 Marked in the figure: 1-brush box, 2-brush holder, 31-ground carbon brush, 32-arc carbon brush, 41-stainless steel constant spring, 42-compression spring. detailed description
下面结合附图和具体实施方式对本发明作进一歩的说明。 为了使发明的目的、 技术方案及优点更加清楚明白， 以下结合附图及实施 例， 对本发明进行进一歩详细说明。 应当理解， 此处所描述的具体实施例仅用 以解释本发明， 并不用于限定本发明。 实施例 1 The invention will be further described with reference to the drawings and specific embodiments. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Example 1
如附图 1、 附图 2所示， 本实施例电力机车接地装置包括刷盒 1、 固定于 刷盒 1内的刷架 2以及设置在刷架上的接地碳刷 31和消弧碳刷 32， 接地碳刷 31和消弧碳刷 32的末端通过软线与刷架 2连接， 所述刷架 2上设有用于导电 的电缆接线端子， 刷架 2的中心设置有孔， 消弧碳刷 32安装在刷架中心的孔 内， 三个接地碳刷 31均匀设置在以刷架 2中心为圆心的圆周上， 所述接地碳 刷 31底部与刷架 2之间设置有使接地碳刷 31头部与圆形摩擦铜盘紧密接触的 不锈钢恒力弹簧 41 ;消弧碳刷 32底部与刷架 2之间设置有使消弧碳刷 32头部 与圆形摩擦铜盘紧密接触的压缩弹簧 42，上述电力机车接地装置的具体消弧方 法为： 在接地碳刷 31与摩擦铜盘之间， 消弧碳刷 32与摩擦铜盘之间分别施加 不同的压力，施加在接地碳刷 31与摩擦铜盘之间的压力小于消弧碳刷 32与摩 擦铜盘之间的压力。 另外接地碳刷 31的导电性高于消弧碳刷 32， 导电性能相 对更好的接地碳刷 31有利于控制工作电流流经碳刷的发热量，避免发生烧损； 消弧碳刷 32的耐磨性高于接地碳刷 31，耐磨性能相对更好的消弧碳刷 32有利 于控制在相对更大压力下与摩擦铜盘相接触并发生相对运动而产生的磨耗量。
由于在以刷架 2中心为圆心的圆周上均匀设置三个接地碳刷 31，另外在刷 架 2的中心孔内安装消弧碳刷 32， 当接地装置工作时， 施加在接地碳刷 31与 摩擦铜盘之间的压力要小于施加在消弧碳刷 32与摩擦铜盘之间的压力。 对接 地碳刷 31与摩擦铜盘之间施加较小的压紧力可确保接地碳刷 31与摩擦铜盘发 生较大量相对运动时也只产生较小的磨耗量， 增强接地碳刷的使用寿命； 对消 弧碳刷 32与摩擦铜盘之间施加较大的压紧力确保在强烈振动工况下， 即便接 地碳刷 31与摩擦铜盘分离后， 消弧碳刷 32与摩擦铜盘也不发生分离， 能够正 常导电。 另外针对消弧碳刷 32与摩擦铜盘之间压紧力大， 由此导致消弧碳刷 32相对于接地碳刷 31的磨损量高， 消弧碳刷 32可采用耐磨性高的材料制造， 同时由于消弧碳刷 32与摩擦铜盘之间的较小量相对运动也只产生较小的磨耗 量，如此可实现接地碳刷 31和消弧碳刷 32都具有较长使用寿命，消弧碳刷 32 的存在可避免接地装置在强烈振动工况下由于接地碳刷 31与摩擦铜盘分离后， 二者之间产生高电压发生起弧烧损，导致摩擦面恶化从而大幅缩短二者使用寿 命的情况发生。 以上所述仅为本发明的较佳实施例而已， 并不用以限制本发明， 凡在本发 明的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明 的保护范围之内。
As shown in FIG. 1 and FIG. 2, the grounding device for an electric locomotive of the present embodiment includes a brush box 1, a brush holder 2 fixed in the brush box 1, and a ground carbon brush 31 and an arc extinguishing carbon brush 32 disposed on the brush holder. The ends of the grounding carbon brush 31 and the arc extinguishing carbon brush 32 are connected to the brush holder 2 through a flexible wire. The brush holder 2 is provided with a cable terminal for conducting electricity, and the center of the brush holder 2 is provided with a hole, and the arc extinguishing carbon brush 32 is installed in the hole in the center of the brush holder, and the three grounding carbon brushes 31 are evenly disposed on the circumference centered on the center of the brush holder 2. The grounding carbon brush 31 is disposed between the bottom of the grounding carbon brush 31 and the brush holder 2. a stainless steel constant force spring 41 in which the head is in close contact with the circular friction copper disk; a compression spring is provided between the bottom of the arc extinguishing carbon brush 32 and the brush holder 2 to closely contact the head of the arc extinguishing carbon brush 32 with the circular friction copper disk The specific arc extinguishing method of the electric locomotive grounding device is as follows: between the grounding carbon brush 31 and the friction copper disk, different pressures are applied between the arc extinguishing carbon brush 32 and the friction copper disk, respectively, and are applied to the grounding carbon brush 31 and The pressure between the friction copper disks is less than the pressure between the arc extinguishing carbon brush 32 and the friction copper disk. In addition, the grounding carbon brush 31 has higher conductivity than the arc extinguishing carbon brush 32, and the grounding carbon brush 31 having relatively better conductive performance is beneficial for controlling the heat generated by the working current flowing through the carbon brush to avoid burning; the arc extinguishing carbon brush 32 The wear resistance is higher than that of the ground carbon brush 31, and the arc extinguishing carbon brush 32 having a relatively better wear resistance is advantageous for controlling the amount of wear generated by the relative friction with the friction copper disk under relatively large pressure. Since three grounding carbon brushes 31 are uniformly disposed on the circumference centered on the center of the brush holder 2, an arc extinguishing carbon brush 32 is additionally installed in the center hole of the brush holder 2, and when the grounding device is operated, the grounding carbon brush 31 is applied. The pressure between the friction copper discs is less than the pressure applied between the arc extinguishing carbon brushes 32 and the friction copper discs. Applying a small pressing force between the grounded carbon brush 31 and the friction copper plate ensures that only a small amount of wear is generated when the ground carbon brush 31 and the friction copper disk are relatively moved relative to each other, and the service life of the ground carbon brush is enhanced. Applying a large pressing force between the arc extinguishing carbon brush 32 and the friction copper plate ensures that, under strong vibration conditions, even after the grounded carbon brush 31 is separated from the friction copper disk, the arc extinguishing carbon brush 32 and the friction copper disk are also Without separation, it can conduct electricity normally. In addition, the pressing force between the arc extinguishing carbon brush 32 and the friction copper disk is large, thereby causing high wear of the arc extinguishing carbon brush 32 relative to the ground carbon brush 31, and the arc extinguishing carbon brush 32 can adopt a material with high wear resistance. Manufacture, and at the same time, only a small amount of wear is generated due to the relatively small amount of relative movement between the arc extinguishing carbon brush 32 and the friction copper disk, so that the ground carbon brush 31 and the arc extinguishing carbon brush 32 have a long service life. The presence of the arc-extinguishing carbon brush 32 can prevent the grounding device from being burnt due to the high voltage generated between the grounded carbon brush 31 and the friction copper plate under strong vibration conditions, resulting in deterioration of the friction surface and greatly shortening The life of the person occurs. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.
Claims
1、 一种电力机车接地装置， 包括刷盒 （1)、 固定于刷盒 （1) 内的刷架 (2)以及设置在刷架上的碳刷，碳刷末端通过软线与刷架（2)连接，刷架（2) 上设有用于导电的电缆接线端子， 其特征在于： 设置在刷架上的碳刷包括接地 碳刷 （31) 和消弧碳刷 （32)， 接地碳刷 （31) 和消弧碳刷 （32) 的底部与刷 架 （2) 之间都设置有使碳刷头部与圆形摩擦铜盘紧密接触的弹簧。 1. An electric locomotive grounding device, including a brush box (1), a brush holder (2) fixed in the brush box (1), and a carbon brush arranged on the brush holder. The end of the carbon brush is connected to the brush holder ( 2) Connection, the brush holder (2) is provided with cable terminals for conduction, which is characterized in that: the carbon brushes provided on the brush holder include a grounding carbon brush (31) and an arc-extinguishing carbon brush (32). The grounding carbon brush (31) and the bottom of the arc-extinguishing carbon brush (32) and the brush holder (2) are provided with springs that make the carbon brush head closely contact the circular friction copper plate.
2、 根据权利要求 1所述的电力机车接地装置，其特征在于：所述刷架（2) 的中心有孔， 消弧碳刷 （32) 安装在刷架中心的孔内， 多个接地碳刷 （31) 均 匀设置在以刷架 （2) 中心为圆心的圆周上。 2. The electric locomotive grounding device according to claim 1, characterized in that: there is a hole in the center of the brush holder (2), an arc-extinguishing carbon brush (32) is installed in the hole in the center of the brush holder, and a plurality of grounding carbon brushes The brush (31) is evenly arranged on the circumference with the center of the brush holder (2) as the center.
3、 根据权利要求 2所述的电力机车接地装置， 其特征在于： 所述接地碳 刷 （31) 至少设置两个， 且均匀设置在以刷架 （2) 中心为圆心的圆周上。。 3. The electric locomotive grounding device according to claim 2, characterized in that: at least two of the grounding carbon brushes (31) are provided, and they are evenly arranged on the circumference with the center of the brush holder (2) as the center. .
4、 根据权利要求 1或 2所述的电力机车接地装置， 其特征在于： 所述接 地碳刷 （31) 底部与刷架 （2) 之间设置有使接地碳刷 （31) 头部与圆形摩擦 铜盘紧密接触的不锈钢恒力弹簧 （41); 消弧碳刷 （32)底部与刷架 （2) 之间 设置有使消弧碳刷 （32) 头部与圆形摩擦铜盘紧密接触的压缩弹簧 （42)。 4. The electric locomotive grounding device according to claim 1 or 2, characterized in that: a head of the grounding carbon brush (31) is arranged between the bottom of the grounding carbon brush (31) and the brush holder (2). A stainless steel constant force spring (41) that is in close contact with the circular friction copper disk; between the bottom of the arc-extinguishing carbon brush (32) and the brush holder (2) is a spring that makes the head of the arc-extinguishing carbon brush (32) closely contact the circular friction copper plate Contact compression spring (42).
5、 根据权利要求 1所述的电力机车接地装置， 其特征在于： 所述接地碳 刷 （31) 和消弧碳刷 （32) 的末端分别通过软线与刷架 （2) 连接。 5. The electric locomotive grounding device according to claim 1, characterized in that: the ends of the grounding carbon brush (31) and the arc-extinguishing carbon brush (32) are respectively connected to the brush holder (2) through soft wires.
6、 根据权利要求 5所述的电力机车接地装置， 其特征在于： 所述接地碳 刷 (31) 的导电性高于消弧碳刷 （32)。 6. The electric locomotive grounding device according to claim 5, characterized in that: the conductivity of the grounding carbon brush (31) is higher than that of the arc-extinguishing carbon brush (32).
7、 根据权利要求 6所述的电力机车接地装置， 其特征在于： 所述消弧碳 刷 (32) 的耐磨性高于接地碳刷 （31)。 7. The electric locomotive grounding device according to claim 6, characterized in that: the wear resistance of the arc-extinguishing carbon brush (32) is higher than that of the grounding carbon brush (31).
8、 一种使用权利要求 1所述装置的消弧方法， 包括： 在接地碳刷 （31) 与摩擦铜盘之间， 消弧碳刷 （32)与摩擦铜盘之间分别施加不同的压力， 施加 在接地碳刷 （31) 与摩擦铜盘之间的压力小于消弧碳刷 （32)与摩擦铜盘之间
的压力。 8. An arc-extinguishing method using the device of claim 1, comprising: applying different pressures between the grounded carbon brush (31) and the friction copper plate, and between the arc-extinguishing carbon brush (32) and the friction copper plate. , the pressure exerted between the grounding carbon brush (31) and the friction copper plate is less than that between the arc-extinguishing carbon brush (32) and the friction copper plate pressure.
9、 根据权利要求 8所述的方法， 其特征在于： 施加在接地碳刷 （31 ) 与 摩擦铜盘之间的压力大于 lOkPa小于 40kPa， 施加在消弧碳刷 （32 ) 与摩擦铜 盘之间的压力大于 lOkPa小于 40kPa。
9. The method according to claim 8, characterized in that: the pressure applied between the grounding carbon brush (31) and the friction copper plate is greater than 10kPa and less than 40kPa, and the pressure applied between the arc-extinguishing carbon brush (32) and the friction copper plate is The pressure between them is greater than 10kPa and less than 40kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| RU2016139982U RU170593U1 (en) | 2014-03-12 | 2014-04-15 | ELECTRIC TRUCK EARTHING DEVICE |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410088597.XA CN103811963B (en) | 2014-03-12 | 2014-03-12 | The arc extinguishing method of electric locomotive earthing device |
| CN201410088597.X | 2014-03-12 | ||
| CN201420109572.9U CN203813041U (en) | 2014-03-12 | 2014-03-12 | Electric locomotive grounding device |
| CN201420109572.9 | 2014-03-12 |
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| WO2015135235A1 true WO2015135235A1 (en) | 2015-09-17 |
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| PCT/CN2014/075366 WO2015135235A1 (en) | 2014-03-12 | 2014-04-15 | Electric locomotive grounding device and arc suppression method |
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| WO (1) | WO2015135235A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2297786Y (en) * | 1996-06-19 | 1998-11-18 | 张荣民 | Contacting voltage regulator |
| DE10012739A1 (en) * | 2000-03-16 | 2001-09-27 | Schunk Metall & Kunststoff | Earthing contact for transmission of currents between fixed vehicle parts of electric driven vehicle such as electric locomotive or driven and travel vehicle with its rotating wheel axle including at least one contact element |
| CN201046675Y (en) * | 2007-06-22 | 2008-04-16 | 大同市东方机车配件有限公司 | Electric locomotive earthing device |
| CN201142509Y (en) * | 2007-10-18 | 2008-10-29 | 株洲九方电器设备有限公司 | Axle head grounding device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2329174C1 (en) * | 2006-12-13 | 2008-07-20 | Открытое акционерное общество Научно-исследовательский и конструкторско-технологический институт подвижного состава (ОАО "ВНИКТИ") | Electroconducting grounding connection of axle box with freight car truck frame (versions) |
-
2014
- 2014-04-15 RU RU2016139982U patent/RU170593U1/en not_active IP Right Cessation
- 2014-04-15 WO PCT/CN2014/075366 patent/WO2015135235A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2297786Y (en) * | 1996-06-19 | 1998-11-18 | 张荣民 | Contacting voltage regulator |
| DE10012739A1 (en) * | 2000-03-16 | 2001-09-27 | Schunk Metall & Kunststoff | Earthing contact for transmission of currents between fixed vehicle parts of electric driven vehicle such as electric locomotive or driven and travel vehicle with its rotating wheel axle including at least one contact element |
| CN201046675Y (en) * | 2007-06-22 | 2008-04-16 | 大同市东方机车配件有限公司 | Electric locomotive earthing device |
| CN201142509Y (en) * | 2007-10-18 | 2008-10-29 | 株洲九方电器设备有限公司 | Axle head grounding device |
Also Published As
| Publication number | Publication date |
|---|---|
| RU170593U1 (en) | 2017-05-02 |
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