WO2021007793A1 - 一种牵引电动机轴承密封结构及安装方法 - Google Patents

一种牵引电动机轴承密封结构及安装方法 Download PDF

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Publication number
WO2021007793A1
WO2021007793A1 PCT/CN2019/096276 CN2019096276W WO2021007793A1 WO 2021007793 A1 WO2021007793 A1 WO 2021007793A1 CN 2019096276 W CN2019096276 W CN 2019096276W WO 2021007793 A1 WO2021007793 A1 WO 2021007793A1
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Prior art keywords
sealing ring
oil return
oil
sealing structure
sealing
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PCT/CN2019/096276
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English (en)
French (fr)
Inventor
黄元通
温乐平
卢文冠
邱添
谢元仲
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成都中车电机有限公司
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Priority to PCT/CN2019/096276 priority Critical patent/WO2021007793A1/zh
Publication of WO2021007793A1 publication Critical patent/WO2021007793A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields

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  • the invention relates to the field of traction motor seal design, in particular to a traction motor bearing seal structure and an installation method.
  • the transmission end bearings and transmission gears of the traction motor are lubricated with lubricating oil inside the gearbox. During the operation of the traction motor, if the lubricating oil enters the interior of the motor, it will directly affect the reliability of the traction motor.
  • sealing rings are currently used for oil sealing.
  • this sealing structure design is prone to seal failure due to the wear of the sealing ring.
  • the installation and fixation of the sealing ring are also cumbersome, and a positioning structure design matched with the sealing ring is required, which not only increases the cost, but also has low sealing reliability.
  • the technical problem to be solved by the present invention is to provide a traction motor bearing sealing structure and an installation method to improve the sealing reliability of the transmission end of the traction motor in view of the problems existing in the prior art.
  • a traction motor sealing structure including an inner sealing ring, an inner oil seal, an end cover, a spacer and a sealing ring, and the inner sealing ring is respectively connected to the rotating shaft and the sealing ring
  • a sealing structure is formed, the inner oil seal forms a sealing structure with the rotating shaft and the sealing ring respectively, the end cover is fixedly connected with the sealing ring and the gear box, and the first oil return passage is formed on the spacer.
  • the first oil return channel communicates with the inner cavity of the gear box, the spacer is fixedly connected with the end cover, and a clearance fit structure is formed between the spacer and the inner oil seal.
  • a first oil return hole is formed on the spacer, a second oil return passage is formed on the end cover, and the second oil return passage communicates with the inner cavity of the gear box.
  • the oil return hole communicates with the second oil return passage.
  • a confluence oil passage is formed on the end cover, and the confluence oil passage is in communication with the second oil return passage; the first oil return holes are provided with several, and the several first oil return holes are all connected with The confluence oil passage is connected.
  • the cross-sectional shape of the confluence oil passage is a T-shaped structure, and its relatively small end is in communication with the second oil return passage.
  • a second oil return hole is formed on the end cover, and the second oil return hole communicates with the second oil return passage.
  • the cross-sectional shape of the second oil return hole is a T-shaped structure, and its relatively small end is in communication with the second oil return passage.
  • a third oil return hole is formed on the sealing ring, and the third oil return hole communicates with the second oil return passage.
  • the second oil return passage is arranged obliquely with respect to the rotating shaft.
  • a lug is formed on the spacer, and a positioning hole is formed on the lug; a connecting bolt penetrates the positioning hole between the spacer and the end cover to form a fixed connection structure.
  • both lugs are located on the same side of the installation vertical center line of the spacer.
  • a plurality of protruding teeth and grooves are formed on the inner sealing ring and the sealing ring respectively, and the inner sealing ring and the sealing ring are engaged with each other through the protruding teeth and the grooves to form a labyrinth seal structure.
  • a plurality of protruding teeth and grooves are respectively formed on the inner oil seal and the sealing ring, and the inner oil seal and the sealing ring are engaged with each other through the protruding teeth and the grooves to form a labyrinth seal structure.
  • a detachable fixed connection structure is formed between the end cover and the sealing ring through a connecting bolt.
  • the first oil return passage on the spacer is arranged obliquely with respect to the rotating shaft.
  • a method for installing a sealing structure of a traction motor includes the following steps:
  • the inner sealing ring is fixedly installed on the rotating shaft, and a sealing structure is formed between the inner sealing ring and the rotating shaft;
  • the inner oil seal is fixedly installed on the rotating shaft, and the inner oil seal forms a sealing structure with the rotating shaft and the sealing ring respectively;
  • the spacer is fixedly installed on the end cover, and a clearance fit structure is formed between the spacer and the inner oil seal.
  • the first oil return passage is formed on the spacer, and the first oil return passage is connected to the inner oil seal of the gear box. The cavity is connected.
  • the sealing structure of the traction motor is installed in a vertical installation manner.
  • the inner sealing ring and the rotating shaft form a fixed sealing structure in an interference fit manner.
  • a fixed sealing structure is formed between the inner oil seal and the rotating shaft in an interference fit manner.
  • a fixed connection structure is formed between the spacer and the end cover in an interference fit manner.
  • the present invention has the following beneficial effects: the inner sealing ring forms a sealing structure with the rotating shaft and the sealing ring respectively, the inner oil seal forms a sealing structure with the rotating shaft and the sealing ring respectively, and the first oil return passage on the spacer It is communicated with the inner cavity of the gear box. Therefore, when the lubricating oil in the inner cavity of the gear box enters the gap between the spacer and the inner oil seal, the lubricating oil will return to the gear box through the first oil return passage under the action of gravity. In the inner cavity, the lubricating oil in the inner cavity of the gear box is effectively prevented from passing through the inner sealing ring and entering the inside of the traction motor, which improves the sealing reliability of the transmission end of the traction motor.
  • Fig. 1 is a schematic diagram of a sealing structure of a traction motor of the present invention.
  • Fig. 2 is a partial enlarged view of A in Fig. 1.
  • Fig. 3 is a front view of the spacer in Fig. 1.
  • Fig. 4 is a cross-sectional view of the spacer in Fig. 1.
  • the traction motor sealing structure shown in Figure 1 and Figure 2 mainly includes a rotating shaft 1, an inner sealing ring 2, an inner oil seal 3, an end cover 5, a spacer 6, a gear box 7 and a sealing ring 9.
  • One end of the rotating shaft 1 It is connected with the bearing 10, and a transmission gear 8 is fixedly connected to the rotating shaft 1, and the transmission gear 8 is located in the hollow inner cavity of the gear box 7.
  • the transmission gear 8 can be directly processed on the rotating shaft 1 so that an integrated structure is formed between the transmission gear 8 and the rotating shaft 1.
  • the inner sealing ring 2 is fixedly sleeved with the rotating shaft 1, and a sealing structure is formed between the inner sealing ring 2 and the rotating shaft 1.
  • the inner oil seal 3 is fixedly sleeved with the rotating shaft 1, and a sealing structure is formed between the inner oil seal 3 and the rotating shaft 1.
  • the end cover 5 is fixedly connected to the spacer 6, the sealing ring 9, and the gear box 7 respectively; usually, the spacer 6 and the end cover 5 form a fixed connection structure in an interference fit manner, and the end A detachable fixed connection structure is formed between the cover 5 and the sealing ring 9 through the connecting bolt 4, and opposite ends of the sealing ring 9 form a sealing structure with the inner sealing ring 2 and the inner oil seal 3 respectively.
  • a clearance fit structure is formed between the spacer 6 and the inner oil seal 3, and a first oil return passage 61 is formed on the spacer 6, and the first oil return passage 61 communicates with the inner cavity of the gear box 7. Therefore, after the lubricating oil in the inner cavity of the gear box 7 enters the gap between the spacer 6 and the inner oil seal 3, the lubricating oil will return to the gear box 7 along the first oil return passage 61 under the action of gravity. In the inner cavity, the sealing effect of the transmission end of the traction motor is achieved, and the lubricating oil in the inner cavity of the gear box 7 is effectively prevented from entering the inside of the traction motor.
  • the inner sealing ring 2 and the sealing ring 9 may be formed with a number of convex teeth and grooves respectively, and the inner sealing ring 2 and the sealing ring 9 pass through convex teeth. It meshes with the groove to form a labyrinth seal structure.
  • the inner oil seal 3 and the sealing ring 9 can also be formed with a number of protruding teeth and grooves respectively, and the inner oil seal 3 and the sealing ring 9 pass between The convex teeth and the grooves mesh with each other to form a labyrinth sealing structure.
  • the end cover 5 may respectively form a second oil return passage 51, a confluence oil passage 52, and a second oil return hole 53.
  • the second oil return passage 51 communicates with the inner cavity of the gear box 7.
  • the confluence oil passage 52 and the second oil return hole 53 communicate with the second oil return passage 51 respectively.
  • a first oil return hole 62 may be formed on the spacer 6. Generally, there are several first oil return holes 62, and the several first oil return holes 62 are all connected to the confluence oil passage 52, as shown in Figure 2, Shown in Figure 4.
  • a third oil return hole 91 may be formed on the seal ring 9, and the first oil return hole 62 and the third oil return hole 91 are respectively communicated with the second oil return passage 51.
  • a lug 63 can be formed on the spacer 6, and a positioning hole 64 can be provided on the lug 63, as shown in Figure 3, Figure 3 4; the spacer 6 and the end cover 5 can be connected through the positioning hole 64 through the connecting bolt 4 to form a fixed connection structure.
  • the two lugs 63 are located on the same side of the installation vertical centerline of the spacer 6; the lug 63 is preferably a transmission gear pair located in the gear box 7
  • the engaging side of the spacer 6 is not provided with the lug 63 and the positioning hole 64 on the other side of the installation vertical center line of the spacer 6.
  • the first oil return passage 61 can be arranged obliquely with respect to the rotating shaft 1, and similarly, the second oil return passage 51 can also be arranged obliquely with respect to the rotating shaft 1.
  • the cross-sectional shape of the confluence oil passage 52 preferably adopts a T-shaped structure, and its relatively small end is in communication with the second oil return passage 51, and the cross-sectional shape of the second oil return hole 53 also preferably adopts a T-shaped structure, which is relatively more The small end communicates with the second oil return passage 51, as shown in FIG. 2.
  • the above-mentioned traction motor sealing structure can be installed in a vertical installation mode, and the specific installation steps are as follows:
  • the inner sealing ring 2 is fixedly installed on the rotating shaft 1, and a sealing structure is formed between the inner sealing ring 2 and the rotating shaft 1.
  • the inner sealing ring 2 and the rotating shaft 1 adopt an interference fit to form a fixed sealing structure.
  • the sealing ring 9 and the end cover 5 are fixedly connected, and a sealing structure is formed between the sealing ring 9 and the inner sealing ring 2.
  • the inner oil seal 3 is fixedly installed on the rotating shaft 1, and the inner oil seal 3 forms a sealing structure with the rotating shaft 1 and the sealing ring 9 respectively.
  • the internal oil seal 3 and the rotating shaft 1 may adopt an interference fit to form a fixed sealing structure.
  • step 4 the spacer 6 is fixedly installed on the end cover 5, and a clearance fit structure is formed between the spacer 6 and the inner oil seal 3.
  • a first oil return passage 61 is formed on the spacer 6 and the first The oil return passage 61 communicates with the inner cavity of the gear box 7.
  • the spacer 6 and the end cap 5 may adopt an interference fit to form a fixed connection structure.
  • the bearing 10 and the transmission gear 8 at the transmission end of the traction motor are lubricated by the oil in the inner cavity of the gear box 7, and the lubricating oil in the inner cavity of the gear box 7 enters the spacer 6 and After the gap between the inner oil seal 3, the lubricating oil will return to the inner cavity of the gear box 7 through the first oil return passage 61 and the second oil return passage 51 under the action of gravity, thereby effectively preventing the inner cavity of the gear box 7
  • the lubricating oil in the cavity escapes through the inner sealing ring 2 and enters the inside of the traction motor, which improves the sealing reliability of the transmission end of the traction motor, thereby improving the working reliability of the traction motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

一种牵引电动机轴承密封结构，包括内封环(2)、内油封(3)、端盖(5)、隔套(6)和密封环(9)，内封环(2)分别与转轴(1)、密封环(9)形成密封结构，内油封(3)分别与转轴(1)、密封环(9)形成密封结构，所述的隔套(6)上形成与齿轮箱(7)内腔相通的第一回油通道(61)，且隔套(6)与内油封(3)之间形成间隙配合结构。还包括一种牵引电动机轴承密封结构安装方法，包括如下步骤：S1，将内封环(2)固定安装到转轴(1)上，且内封环(2)与转轴(1)之间形成密封结构；S2，将密封环(9)与端盖(5)固定连接，且密封环(9)与内封环(2)之间形成密封结构；S3，将内油封(3)固定安装到转轴(1)上，且内油封(3)分别与转轴(1)、密封环(9)形成密封结构；S4，将隔套(6)固定安装到端盖(5)上，且隔套(6)与内油封(3)之间形成间隙配合结构，所述的隔套(6)上形成第一回油通道(61)，并使第一回油通道(61)与齿轮箱(7)的内腔相通。本发明可使进入隔套(6)与内油封(3)间隙的润滑油在重力的作用下通过第一回油通道(61)返回到齿轮箱(7)的内腔中，阻止齿轮箱(7)中的润滑油窜过内封环而进入牵引电动机内部，提高牵引电动机传动端的密封可靠性。

Description

一种牵引电动机轴承密封结构及安装方法 技术领域
本发明涉及牵引电动机密封设计领域，尤其是涉及一种牵引电动机轴承密封结构及安装方法。
背景技术
牵引电动机的传动端轴承及传动齿轮均采用齿轮箱内部的润滑油进行润滑，在牵引电动机工作过程中，如果润滑油进入电动机内部，将直接影响到牵引电动机的工作可靠性。
为了防止齿轮箱内部的润滑油进入电动机内部，目前主要是采用密封圈进行油密封。但是，在牵引电动机工作过程中，这种密封结构设计容易因密封圈磨损而导致密封失效。另外，密封圈的安装、固定也比较繁琐，需要与密封圈配套的定位结构设计，不仅增加成本，而且密封可靠性也不高。
发明内容
本发明要解决的技术问题是：针对现有技术存在的问题，提供一种牵引电动机轴承密封结构及安装方法，提高牵引电动机传动端的密封可靠性。
本发明要解决的技术问题采用以下技术方案来实现：一种牵引电动机密封结构，包括内封环、内油封、端盖、隔套和密封环，所述的内封环分别与转轴、密封环形成密封结构，所述的内油封分别与转轴、密封环形成密封结构，所述的端盖分别与密封环、齿轮箱固定连接，所述的隔套上形成第一回油通道，所述的第一回油通道与齿轮箱的内腔相通，所述的隔套与端盖固定连接、且隔套与内油封之间形成间隙配合结构。
优选地，所述的隔套上形成第一回油孔，所述的端盖上形成第二回油通道，所述的第二回油通道与齿轮箱的内腔相通，所述的第一回油孔与第二回油通道相通。
优选地，所述的端盖上形成汇流油道，所述的汇流油道与第二回油通道连通；所述的第一回油孔设置若干条，且若干条第一回油孔均与汇流油道连通。
优选地，所述汇流油道的截面形状呈T形结构，其相对较小端与第二回油通道连通。
优选地，所述的端盖上形成第二回油孔，所述的第二回油孔与第二回油通道连通。
优选地，所述第二回油孔的截面形状呈T形结构，其相对较小端与第二回油通道 连通。
优选地，所述的密封环上形成第三回油孔，所述的第三回油孔与第二回油通道连通。
优选地，所述的第二回油通道相对于转轴倾斜设置。
优选地，所述的隔套上形成凸耳，在凸耳上开设定位孔；所述的隔套与端盖之间通过连接螺栓贯穿定位孔形成固定连接结构。
优选地，所述的凸耳设置2个，且2个凸耳均位于隔套的安装垂直中心线的同一侧。
优选地，所述的内封环、密封环上分别形成若干凸齿和凹槽，所述的内封环与密封环之间通过凸齿与凹槽相互啮合而形成迷宫式密封结构。
优选地，所述的内油封、密封环上分别形成若干凸齿和凹槽，所述的内油封与密封环之间通过凸齿与凹槽相互啮合而形成迷宫式密封结构。
优选地，所述的端盖与密封环之间通过连接螺栓形成可拆卸的固定连接结构。
优选地，所述隔套上的第一回油通道相对于转轴倾斜设置。
一种牵引电动机密封结构的安装方法，包括如下步骤：
S1，将内封环固定安装到转轴上，且内封环与转轴之间形成密封结构；
S2，将密封环与端盖固定连接，且密封环与内封环之间形成密封结构；
S3，将内油封固定安装到转轴上，且内油封分别与转轴、密封环形成密封结构；
S4，将隔套固定安装到端盖上，且隔套与内油封之间形成间隙配合结构，所述的隔套上形成第一回油通道，并使第一回油通道与齿轮箱的内腔相通。
优选地，所述的牵引电动机密封结构是采用立装方式进行安装。
优选地，所述的内封环与转轴之间以过盈配合方式形成固定密封结构。
优选地，所述的内油封与转轴之间以过盈配合方式形成固定密封结构。
优选地，所述的隔套与端盖之间以过盈配合方式形成固定连接结构。
与现有技术相比，本发明的有益效果是：由于内封环分别与转轴、密封环形成密封结构、内油封分别与转轴、密封环形成密封结构，并且隔套上的第一回油通道与齿轮箱的内腔相通，因此，当齿轮箱内腔中的润滑油进入隔套与内油封之间的间隙后，润滑油将在重力的作用下通过第一回油通道返回到齿轮箱的内腔中，以有效阻止齿轮箱内腔中的润滑油窜过内封环而进入到牵引电动机内部，提高了牵引电动机传动端的密封可靠性。
附图说明
图1为本发明一种牵引电动机密封结构的构造示意图。
图2为图1中A处的局部放大图。
图3为图1中的隔套的主视图。
图4为图1中的隔套的剖视图。
图中部品标记名称：1-转轴，2-内封环，3-内油封，4-连接螺栓，5-端盖，6-隔套，7-齿轮箱，8-传动齿轮，9-密封环，10-轴承，51-第二回油通道，52-汇流油道，53-第二回油孔，61-第一回油通道，62-第一回油孔，63-凸耳，64-定位孔，91-第三回油孔。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图和具体实施例对本发明进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1、图2所示的牵引电动机密封结构，主要包括转轴1、内封环2、内油封3、端盖5、隔套6、齿轮箱7和密封环9，所述转轴1的一端与轴承10连接，在转轴1上固定连接传动齿轮8，所述的传动齿轮8位于齿轮箱7的中空内腔中。为简化装配工艺，提高连接强度，所述的传动齿轮8可以是直接在转轴1上加工而成，从而使传动齿轮8与转轴1之间形成一体化成型结构。所述的内封环2与转轴1固定套接、且内封环2与转轴1之间形成密封结构。所述的内油封3与转轴1固定套接、且内油封3与转轴1之间形成密封结构。所述的端盖5分别与隔套6、密封环9、齿轮箱7固定连接；通常，所述的隔套6与端盖5之间以过盈配合方式形成固定连接结构，所述的端盖5与密封环9之间通过连接螺栓4形成可拆卸的固定连接结构，所述密封环9的相对两端分别与内封环2、内油封3形成密封结构。
所述的隔套6与内油封3之间形成间隙配合结构，在隔套6上形成第一回油通道61，所述的第一回油通道61与齿轮箱7的内腔相通。因此，所述齿轮箱7内腔中的润滑油在进入隔套6与内油封3之间的间隙后，润滑油在重力的作用下将沿着第一回油通道61返回到齿轮箱7的内腔中，从而达到牵引电动机传动端的密封功效，有效地阻止了齿轮箱7内腔中的润滑油进入到牵引电动机内部。
为了进一步提高上述牵引电动机传动端的密封可靠性，所述的内封环2、密封环9上可以分别形成若干凸齿和凹槽，所述的内封环2与密封环9之间通过凸齿与凹槽相 互啮合而形成迷宫式密封结构，同样地，所述的内油封3、密封环9上也可以分别形成若干凸齿和凹槽，所述的内油封3与密封环9之间通过凸齿与凹槽相互啮合而形成迷宫式密封结构。所述的端盖5上可以分别形成第二回油通道51、汇流油道52、第二回油孔53，所述的第二回油通道51与齿轮箱7的内腔相通，所述的汇流油道52、第二回油孔53分别与第二回油通道51连通。在隔套6上可以形成第一回油孔62，通常，所述的第一回油孔62设置若干条，且若干条第一回油孔62均与汇流油道52连通，如图2、图4所示。在密封环9上可以形成第三回油孔91，所述的第一回油孔62、第三回油孔91分别与第二回油通道51相连通。
采用上述的结构设计后，所述齿轮箱7内腔中的润滑油在进入隔套6与内油封3之间的间隙后，润滑油在重力的作用下，其中的一部分将沿第一回油通道61返回到齿轮箱7的内腔中，而另一部分将在依次流经第一回油孔62、汇流油道52后进入第二回油通道51，还有一部分将在分别流经第二回油孔53、第三回油孔91后进入第二回油通道51，再沿着第二回油通道51返回到齿轮箱7的内腔中，从而提高了牵引电动机传动端的密封可靠性。
为保证流经第一回油孔62的润滑油均能被汇流到汇流油道52中，可以在隔套6上形成凸耳63，在凸耳63上开设定位孔64，如图3、图4所示；所述的隔套6与端盖5之间可以通过连接螺栓4贯穿定位孔64形成固定连接结构。通常，所述的凸耳63设置2个，且2个凸耳63均位于隔套6的安装垂直中心线的同一侧；所述的凸耳63最好是位于齿轮箱7内的传动齿轮副的啮合侧，而隔套6的安装垂直中心线的另一侧则不设凸耳63及定位孔64。通过设置凸耳63对隔套6进行装配定位，可以保证隔套6与端盖5之间的定位可靠度，进而可确保流经第一回油孔62的润滑油均能被准确地引流到汇流油道52中。
当润滑油在重力的作用下返回齿轮箱7内腔中的速度越快时，牵引电动机传动端的密封可靠性就越高。为了提高润滑油返回齿轮箱7内腔中的回流速度，可以将第一回油通道61相对于转轴1倾斜设置，同样地，也将第二回油通道51相对于转轴1倾斜设置。所述汇流油道52的截面形状优选采用T形结构，其相对较小端与第二回油通道51连通，所述第二回油孔53的截面形状也优选采用T形结构，其相对较小端与第二回油通道51连通，如图2所示。
上述的牵引电动机密封结构，可以采用立装方式进行安装，其具体的安装步骤如下：
第1步，将内封环2固定安装到转轴1上，且内封环2与转轴1之间形成密封结构。通常，所述的内封环2与转轴1之间是采用过盈配合方式形成固定密封结构。
第2步，将密封环9与端盖5固定连接，且密封环9与内封环2之间形成密封结构。
第3步，将内油封3固定安装到转轴1上，且内油封3分别与转轴1、密封环9形成密封结构。通常，所述的内油封3与转轴1之间可以采用过盈配合方式形成固定密封结构。
第4步，将隔套6固定安装到端盖5上，且隔套6与内油封3之间形成间隙配合结构，所述的隔套6上形成第一回油通道61，并使第一回油通道61与齿轮箱7的内腔相通。通常，所述的隔套6与端盖5之间可以采用过盈配合方式形成固定连接结构。
在上述的牵引电动机密封结构安装完成之后，牵引电动机传动端的轴承10及传动齿轮8均采用齿轮箱7内腔中的油润滑，而处于齿轮箱7内腔中的润滑油在进入隔套6与内油封3之间的间隙后，润滑油将在重力的作用下通过第一回油通道61、第二回油通道51返回到齿轮箱7的内腔中，从而可以有效地阻止齿轮箱7内腔中的润滑油窜过内封环2而进入到牵引电动机内部，提高了牵引电动机传动端的密封可靠性，进而提高了牵引电动机的工作可靠性。
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，应当指出的是，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。

Claims (19)

  1. 一种牵引电动机密封结构，包括内封环(2)、内油封(3)、端盖(5)和密封环(9)，所述的内封环(2)分别与转轴(1)、密封环(9)形成密封结构，所述的内油封(3)分别与转轴(1)、密封环(9)形成密封结构，所述的端盖(5)分别与密封环(9)、齿轮箱(7)固定连接，其特征在于：还包括隔套(6)，所述的隔套(6)上形成第一回油通道(61)，所述的第一回油通道(61)与齿轮箱(7)的内腔相通，所述的隔套(6)与端盖(5)固定连接、且隔套(6)与内油封(3)之间形成间隙配合结构。
  2. 根据权利要求1所述的一种牵引电动机密封结构，其特征在于：所述的隔套(6)上形成第一回油孔(62)，所述的端盖(5)上形成第二回油通道(51)，所述的第二回油通道(51)与齿轮箱(7)的内腔相通，所述的第一回油孔(62)与第二回油通道(51)相通。
  3. 根据权利要求2所述的一种牵引电动机密封结构，其特征在于：所述的端盖(5)上形成汇流油道(52)，所述的汇流油道(52)与第二回油通道(51)连通；所述的第一回油孔(62)设置若干条，且若干条第一回油孔(62)均与汇流油道(52)连通。
  4. 根据权利要求3所述的一种牵引电动机密封结构，其特征在于：所述汇流油道(52)的截面形状呈T形结构，其相对较小端与第二回油通道(51)连通。
  5. 根据权利要求2所述的一种牵引电动机密封结构，其特征在于：所述的端盖(5)上形成第二回油孔(53)，所述的第二回油孔(53)与第二回油通道(51)连通。
  6. 根据权利要求5所述的一种牵引电动机密封结构，其特征在于：所述第二回油孔(53)的截面形状呈T形结构，其相对较小端与第二回油通道(51)连通。
  7. 根据权利要求2所述的一种牵引电动机密封结构，其特征在于：所述的密封环(9)上形成第三回油孔(91)，所述的第三回油孔(91)与第二回油通道(51)连通。
  8. 根据权利要求2-7任一项所述的一种牵引电动机密封结构，其特征在于：所述的第二回油通道(51)相对于转轴(1)倾斜设置。
  9. 根据权利要求1-7任一项所述的一种牵引电动机密封结构，其特征在于：所述的隔套(6)上形成凸耳(63)，在凸耳(63)上开设定位孔(64)；所述的隔套(6)与端盖(5)之间通过连接螺栓(4)贯穿定位孔(64)形成固定连接结构。
  10. 根据权利要求9所述的一种牵引电动机密封结构，其特征在于：所述的凸耳(63)设置2个，且2个凸耳(63)均位于隔套(6)的安装垂直中心线的同一侧。
  11. 根据权利要求1-7任一项所述的一种牵引电动机密封结构，其特征在于：所述的内封环(2)、密封环(9)上分别形成若干凸齿和凹槽，所述的内封环(2)与密封环(9)之间通过凸齿与凹槽相互啮合而形成迷宫式密封结构。
  12. 根据权利要求1-7任一项所述的一种牵引电动机密封结构，其特征在于：所述的内油封(3)、密封环(9)上分别形成若干凸齿和凹槽，所述的内油封(3)与密封环(9)之间通过凸齿与凹槽相互啮合而形成迷宫式密封结构。
  13. 根据权利要求1-7任一项所述的一种牵引电动机密封结构，其特征在于：所述的端盖(5)与密封环(9)之间通过连接螺栓(4)形成可拆卸的固定连接结构。
  14. 根据权利要求1-7任一项所述的一种牵引电动机密封结构，其特征在于：所述隔套(6)上的第一回油通道(61)相对于转轴(1)倾斜设置。
  15. 一种牵引电动机密封结构的安装方法，其特征在于：包括如下步骤：
    S1，将内封环(2)固定安装到转轴(1)上，且内封环(2)与转轴(1)之间形成密封结构；
    S2，将密封环(9)与端盖(5)固定连接，且密封环(9)与内封环(2)之间形成密封结构；
    S3，将内油封(3)固定安装到转轴(1)上，且内油封(3)分别与转轴(1)、密封环(9)形成密封结构；
    S4，将隔套(6)固定安装到端盖(5)上，且隔套(6)与内油封(3)之间形成间隙配合结构，所述的隔套(6)上形成第一回油通道(61)，并使第一回油通道(61)与齿轮箱(7)的内腔相通。
  16. 根据权利要求15所述的牵引电动机密封结构的安装方法，其特征在于：所述的牵引电动机密封结构是采用立装方式进行安装。
  17. 根据权利要求15所述的牵引电动机密封结构的安装方法，其特征在于：所述的内封环(2)与转轴(1)之间以过盈配合方式形成固定密封结构。
  18. 根据权利要求15所述的牵引电动机密封结构的安装方法，其特征在于：所述的内油封(3)与转轴(1)之间以过盈配合方式形成固定密封结构。
  19. 根据权利要求15所述的牵引电动机密封结构的安装方法，其特征在于：所述的隔套(6)与端盖(5)之间以过盈配合方式形成固定连接结构。
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