WO2018120131A1

WO2018120131A1 - Liquid sealing structure for rotating machinery

Info

Publication number: WO2018120131A1
Application number: PCT/CN2016/113760
Authority: WO
Inventors: 李春辉; 潘晓聪
Original assignee: 深圳智慧能源技术有限公司
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-07-05

Abstract

A liquid sealing structure for rotating machinery (10) comprises a sealing cover (14) rotatably mounted on a shaft (12). The shaft (12) extends from the inside of a liquid chamber (18) to the outside thereof. The sealing cover (14) is fixed to the liquid chamber (18), sealing the liquid chamber (18). The sealing cover (14) has a mounting hole (20) thereon for an installation on the shaft (12). The mounting hole (20) has a draining groove on the inner wall thereof. The liquid sealing structure further comprises a sealing part (16) inside the liquid chamber (18). The sealing part (16) is fixedly mounted on the shaft (12) and rotates with the shaft (12). A wall of the sealing part (16) is close to the draining groove. When the sealing part (16) rotates with the shaft (12), liquid leaking to the wall of the sealing part (16) is thrown to the draining groove by a centrifugal force, such that the liquid returns to the liquid chamber (18) via the draining groove.

Description

转动机械的液体密封结构 Rotating mechanical liquid sealing structure

技术领域 Technical field

[0001] 本发明涉及转动机械，特别是涉及一种转动机械的液体密封结构。 [0001] The present invention relates to a rotating machine, and more particularly to a liquid sealing structure for a rotating machine.

背景技术 Background technique

[0002] 高速电机由于转速高大多采用的是滑动轴承，因此供油润滑是必不可少的条件。但在一些情况下，很容易造成油泄漏，导致不必要的浪费，并且会污染环境。而且由于轴承内侧都是负压，泄漏的油可能被吸入电机体内，甚至渗透至电机绕组上，阻碍电机的正常运转，大大缩短了电机的使用寿命。因此，找到一种可有效防止油泄漏的密封结构是本领域的技术人员亟待解决的问题。 [0002] High-speed motors are mostly made of sliding bearings because of their high speed. Therefore, oil lubrication is an indispensable condition. However, in some cases, it is easy to cause oil leakage, cause unnecessary waste, and pollute the environment. Moreover, since the inside of the bearing is negative pressure, the leaked oil may be sucked into the motor body and even penetrate into the motor winding, hindering the normal operation of the motor and greatly shortening the service life of the motor. Therefore, finding a sealing structure that can effectively prevent oil leakage is an urgent problem to be solved by those skilled in the art.

技术问题 technical problem

[0003] 有鉴于此，本发明提出一种转动机械的液体密封结构。 In view of this, the present invention provides a liquid sealing structure for a rotating machine.

问题的解决方案 Problem solution

技术解决方案 Technical solution

[0004] 本发明提出一种转动机械的液体密封结构，包括转动套设于一转轴上的封盖，所述转轴从一液体腔内延伸至所述液体腔外，所述封盖固定至所述液体腔以封住所述液体腔，所述封盖具有与所述转轴安装的安装孔，所述安装孔内壁面设有导液槽，所述液体密封结构还包括位于所述液体腔内的密封件，所述密封件固定安装于所述转轴上以随所述转轴转动，所述密封件具有一靠近所述导液槽的壁面，在所述密封件随所述转轴转动吋，渗漏至所述密封件的壁面的渗漏液能够在离心力的作用下被甩向所述导液槽并经所述导液槽流回至所述液体腔。 [0004] The present invention provides a liquid sealing structure for a rotating machine, comprising a cover that is rotatably sleeved on a rotating shaft, the rotating shaft extends from a liquid chamber to the outside of the liquid chamber, and the cover is fixed to the a liquid chamber for sealing the liquid chamber, the cover having a mounting hole mounted on the rotating shaft, the inner wall surface of the mounting hole is provided with a liquid guiding groove, and the liquid sealing structure further comprises a liquid guiding chamber The sealing member is fixedly mounted on the rotating shaft to rotate with the rotating shaft, the sealing member has a wall surface close to the liquid guiding groove, and the sealing member rotates with the rotating shaft The leakage liquid leaking to the wall surface of the sealing member can be raked to the liquid guiding groove by the centrifugal force and flow back to the liquid chamber through the liquid guiding groove.

[0005] 在一实施例中，所述密封件包括具有安装孔的环形主体以及沿所述环形主体内周缘轴向延伸的轴套，所述密封件壁面为所述轴套的外表面，所述封盖转动套设在所述轴套的外表面上。 [0005] In an embodiment, the sealing member includes an annular body having a mounting hole and a sleeve extending axially along an inner circumference of the annular body, the sealing member wall surface being an outer surface of the sleeve, The cover is rotatably sleeved on the outer surface of the sleeve.

[0006] 在一实施例中，所述导液槽包括径向导液槽和与所述径向导液槽连通的轴向导液槽，所述渗漏液被甩向所述径向导液槽，然后经所述轴向导液槽流回到所述液体腔。 [0007] 在一实施例中，所述径向导液槽为环形，沿所述封盖的安装孔内壁面的圆周方向延伸。 [0006] In an embodiment, the liquid guiding tank includes a radial liquid guiding tank and a shaft guiding liquid tank communicating with the radial liquid guiding tank, the leakage liquid is turned toward the radial liquid guiding tank, and then Flowing back through the shaft to the liquid chamber. In one embodiment, the radial liquid guiding groove is annular and extends along a circumferential direction of an inner wall surface of the mounting hole of the cover.

[0008] 在一实施例中，所述径向导液槽有多条，每条径向导液槽皆与所述轴向导液槽连通，使得甩向所述径向导液槽的渗漏液能够汇流至所述轴向导液槽。 [0008] In an embodiment, the plurality of radial liquid guiding grooves are connected, and each of the radial liquid guiding grooves communicates with the shaft guiding liquid groove, so that the leakage liquid flowing toward the radial liquid guiding groove can be merged. To the shaft guide tank.

[0009] 在一实施例中，所述密封件与所述封盖之间形成一空间，所述导液槽与所述空间连通。 In an embodiment, a space is formed between the sealing member and the cover, and the liquid guiding groove communicates with the space.

[0010] 在一实施例中，所述环形主体的径向外缘朝所述封盖延伸形成一环形凸缘，所述空间为环形空间，由所述环形主体、所述环形凸缘、所述轴套和所述封盖合围形成，所述环形凸缘设有通孔，所述通孔连通所述环形空间与所述液体腔。 [0010] In an embodiment, a radially outer edge of the annular body extends toward the cover to form an annular flange, and the space is an annular space, and the annular body, the annular flange, and the The sleeve and the cover are formed in a circle, and the annular flange is provided with a through hole, and the through hole communicates with the annular space and the liquid chamber.

[0011] 在一实施例中，所述导液槽包括沿所述封盖的安装孔内壁面的圆周方向延伸的多条径向导液槽和与所述径向导液槽连通的轴向导液槽，所述渗漏液被甩向所述径向导液槽，然后经所述轴向导液槽流到所述环形空间。 [0011] In an embodiment, the liquid guiding tank includes a plurality of radial liquid guiding grooves extending in a circumferential direction of the inner wall surface of the mounting hole of the cover and a shaft guiding liquid tank communicating with the radial liquid guiding groove The leaking liquid is drawn toward the radial liquid guiding tank and then flows to the annular space through the shaft guiding liquid tank.

[0012] 在一实施例中，所述封盖包括一朝向所述密封件凸起的中心部，所述中心部的外径小于所述环形凸缘的内径，所述环形凸缘和所述中心部在轴向上局部重叠 [0012] In an embodiment, the cover includes a central portion that is convex toward the seal, the outer diameter of the central portion is smaller than an inner diameter of the annular flange, the annular flange and the The central part partially overlaps in the axial direction

[0013] 在一些实施例中，所述液体腔为容纳润滑油的油腔。 [0013] In some embodiments, the liquid chamber is an oil chamber that contains lubricating oil.

发明的有益效果 Advantageous effects of the invention

有益效果 Beneficial effect

[0014] 综上所述，本发明提供了一种转动机械的液体密封结构。在液体腔内设置一密封件，利用封盖封住液体腔，封盖转动套设在密封件的壁面上，在封盖的安装孔内壁面上设置导液槽，导液槽与液体腔连通。密封件随转轴转动吋，渗漏至密封件壁面的渗漏液，例如润滑油能够在离心力作用下被甩进导液槽，再经导液槽流回液体腔，进行回收，有效起到密封的作用。而且转轴的转速越大，密封效果越好。此外，密封件与封盖之间还形成一与液体腔连通的环形空间，密封件的环形凸缘与封盖的中心部局部重叠，减小液体腔与环形空间的连通口，可进一步较小油泄漏的几率。本发明的液体密封机构构思新颖，设计巧妙，可有效防止转动机械，特别是高速电机的油泄漏问题。 [0014] In summary, the present invention provides a liquid sealing structure for a rotating machine. A sealing member is arranged in the liquid chamber, and the liquid chamber is sealed by the sealing cover, and the sealing cover is sleeved on the wall surface of the sealing member, and a liquid guiding groove is arranged on the inner wall surface of the mounting hole of the sealing cover, and the liquid guiding groove is connected with the liquid chamber . The sealing member rotates with the rotating shaft, and the leakage liquid leaks to the wall surface of the sealing member. For example, the lubricating oil can be sucked into the liquid guiding tank under the action of centrifugal force, and then flows back to the liquid chamber through the liquid guiding tank for recovery, effectively sealing. The role. Moreover, the greater the rotational speed of the shaft, the better the sealing effect. In addition, an annular space communicating with the liquid chamber is formed between the sealing member and the cover, and the annular flange of the sealing member partially overlaps the central portion of the sealing cover to reduce the communication port between the liquid chamber and the annular space, which can be further reduced. The probability of oil leakage. The liquid sealing mechanism of the invention has novel concept and ingenious design, and can effectively prevent the oil leakage problem of the rotating machinery, especially the high speed motor.

对附图的简要说明附图说明 Brief description of the drawing DRAWINGS

[0015] 图 1是本发明的液体密封结构的剖面示意图。 1 is a schematic cross-sectional view of a liquid sealing structure of the present invention.

[0016] 图 2是本发明的封盖的立体结构示意图。 2 is a schematic perspective view of a cover of the present invention.

本发明的实施方式 Embodiments of the invention

[0017] 在详细描述实施例之前，应该理解的是，本发明不限于本申请中下文或附图中所描述的详细结构或元件排布。本发明可为其它方式实现的实施例。而且，应当理解，本文所使用的措辞及术语仅仅用作描述用途，不应作限定性解释。本文所使用的"包括"、 "包含"、 "具有"等类似措辞意为包含其后所列出之事项、其等同物及其它附加事项。特别是，当描述 "一个某元件 "吋，本发明并不限定该元件的数量为一个，也可以包括多个。 [0017] Before the embodiments are described in detail, it is understood that the invention is not limited to The invention may be embodied in other ways. Further, it should be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and the like, are used in this context to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain component", the present invention does not limit the number of the components to one, and may include a plurality.

[0018] 本发明以高速电机的滑动轴承为例对液体密封结构进行详细说明。 [0018] The present invention describes a liquid sealing structure in detail by taking a sliding bearing of a high speed motor as an example.

[0019] 如图 1-2所示，本发明提供一种转动机械的液体密封结构 10，该液体密封结构 1 0包括转轴 12、封盖 14、密封件 16。转轴 12从一液体腔 18内延伸至液体腔 18外，以图 1为例，封盖 14的左侧为液体腔 18，封盖 14的右侧为外部。在所示的实施例中，液体腔 18可以为装有润滑油的油腔。封盖 14固定至液体腔 18以封住液体腔 1 8，密封件 16位于液体腔 18内，并固定安装在转轴 12上以随转轴 12转动。 As shown in FIGS. 1-2, the present invention provides a liquid sealing structure 10 for a rotating machine, the liquid sealing structure 10 including a rotating shaft 12, a cover 14, and a sealing member 16. The rotary shaft 12 extends from a liquid chamber 18 to the outside of the liquid chamber 18. As shown in Fig. 1, the left side of the cover 14 is a liquid chamber 18, and the right side of the cover 14 is external. In the illustrated embodiment, the liquid chamber 18 can be an oil chamber containing a lubricating oil. The cover 14 is fixed to the liquid chamber 18 to seal the liquid chamber 18. The seal 16 is located in the liquid chamber 18 and is fixedly mounted on the rotary shaft 12 for rotation with the rotary shaft 12.

[0020] 更具体地，封盖 14具有与转轴 12安装的安装孔 20，安装孔 20的内壁面设有导液槽，导液槽与液体腔 18连通。密封件 16具有一靠近所述导液槽的壁面 22。由于密封件 16是位于液体腔 18内的，因此液体腔 18内的液体，例如润滑油会从密封件 16的壁面 22渗出。当密封件 16随转轴 12转动吋，渗漏至密封件 16的壁面 22的渗漏液在离心力的作用下会被甩向与壁面 22靠近的导液槽中，并经导液槽流回至液体腔 18内。而且转轴 12的转速越高，密封件 16的壁面 22上的渗漏液被甩进导液槽的离心力越大，因此液体密封结构 10的密封效果会越好。 More specifically, the cover 14 has a mounting hole 20 mounted to the rotating shaft 12, and the inner wall surface of the mounting hole 20 is provided with a liquid guiding groove, and the liquid guiding groove communicates with the liquid chamber 18. The seal member 16 has a wall surface 22 adjacent to the liquid guiding groove. Since the seal member 16 is located within the liquid chamber 18, liquid within the liquid chamber 18, such as lubricating oil, can seep from the wall surface 22 of the seal member 16. When the sealing member 16 rotates with the rotating shaft 12, the leakage liquid leaking to the wall surface 22 of the sealing member 16 is deflected by the centrifugal force into the liquid guiding groove adjacent to the wall surface 22, and flows back to the liquid guiding groove through the liquid guiding groove. Inside the liquid chamber 18. Further, the higher the rotational speed of the rotary shaft 12, the greater the centrifugal force of the leakage liquid on the wall surface 22 of the seal member 16 being pushed into the liquid guide groove, so that the sealing effect of the liquid seal structure 10 is better.

[0021] 在所示的实施例中，密封件 16包括环形主体 24和轴套 26。环形主体 24具有一用以与转轴 12安装的安装孔，轴套 26为沿环形主体 24的内周缘轴向延伸形成的，并套设在转轴 12上。上述密封件 16的壁面 22即为轴套 26的外表面 22。环形主体 2 4的径向外缘朝向封盖 14延伸形成一环形凸缘 30。 [0022] 密封件 16与封盖 14之间形成一空间 32，所述导液槽与空间 32连通，以使得导液槽中的润滑油可流入空间 32内。具体而言，空间 32为由环形主体 24、环形凸缘 3 0、轴套 26和封盖 14合围形成的以转轴 12为中心的环形空间 32。环形凸缘 30上设有通孔 31，通孔 31分别与环形空间 32和液体腔 18连通。 [0021] In the illustrated embodiment, the seal 16 includes an annular body 24 and a sleeve 26. The annular body 24 has a mounting hole for mounting with the rotating shaft 12. The sleeve 26 is formed to extend axially along the inner circumference of the annular body 24 and is sleeved on the rotating shaft 12. The wall surface 22 of the seal 16 described above is the outer surface 22 of the sleeve 26. The radially outer edge of the annular body 24 extends toward the cover 14 to form an annular flange 30. [0022] A space 32 is formed between the sealing member 16 and the cover 14, and the liquid guiding groove communicates with the space 32 so that the lubricating oil in the liquid guiding groove can flow into the space 32. Specifically, the space 32 is an annular space 32 centered on the rotating shaft 12 formed by the annular body 24, the annular flange 30, the sleeve 26 and the cover 14. The annular flange 30 is provided with through holes 31 which communicate with the annular space 32 and the liquid chamber 18, respectively.

[0023] 在所示的实施例中，封盖 14转动套设在轴套 26的外表面 22上。封盖 14包括一朝向密封件 16凸起的中心部 34。中心部 34的外径小于密封件 16的环形凸缘 30的内径，而且环形凸缘 30与中心部 34在轴向上局部重叠。更具体来说，上述环形空间 32是由密封件 16的环形主体 24、环形凸缘 30、轴套 26以及封盖 14的中心部 34 合围形成。 [0023] In the illustrated embodiment, the cover 14 is rotatably sleeved on the outer surface 22 of the sleeve 26. The cover 14 includes a central portion 34 that projects toward the seal member 16. The outer diameter of the central portion 34 is smaller than the inner diameter of the annular flange 30 of the seal member 16, and the annular flange 30 partially overlaps the central portion 34 in the axial direction. More specifically, the annular space 32 is formed by the annular body 24 of the seal member 16, the annular flange 30, the sleeve 26, and the central portion 34 of the cover 14.

[0024] 所述导液槽设置在封盖安装孔 20的内壁面上。本实施例中，封盖 14的安装孔 20 的内壁面实际上就是中心部 34的径向内侧的内壁面，因此，导液槽也可以说成是设置在中心部 34的径向内侧的内壁面上。 [0024] The liquid guiding groove is provided on an inner wall surface of the cap mounting hole 20. In the present embodiment, the inner wall surface of the mounting hole 20 of the cover 14 is actually the radially inner inner wall surface of the center portion 34. Therefore, the liquid guiding groove can also be said to be disposed radially inward of the central portion 34. On the wall.

[0025] 导液槽包括径向导液槽 36和与径向导液槽 36连通的轴向导液槽 38，径向导液槽 36的槽口与轴套 26的外表面相对，轴向导液槽 38与液体腔 18连通。径向导液槽 3 6为环形，沿封盖 14的安装孔 20的内壁面的圆周方向延伸。本实施例中，径向导液槽 36设置为两条。因此，转轴 12转动吋，渗透液先是从轴套 26的外表面 22甩进径向导液槽 36中，再从径向导液槽 36中流进轴向导液槽 38中，然后经轴向导液槽 38流向液体腔 18。 [0025] The liquid guiding tank includes a radial liquid guiding groove 36 and a shaft guiding liquid groove 38 communicating with the radial liquid guiding groove 36. The notch of the radial liquid guiding groove 36 is opposite to the outer surface of the sleeve 26, and the axial guiding liquid groove 38 and The liquid chamber 18 is in communication. The radial liquid guiding groove 36 is annular and extends in the circumferential direction of the inner wall surface of the mounting hole 20 of the cover 14. In this embodiment, the radial liquid guiding grooves 36 are provided in two. Therefore, when the rotating shaft 12 rotates, the permeate first enters the radial liquid guiding groove 36 from the outer surface 22 of the sleeve 26, and then flows into the shaft guiding liquid tank 38 from the radial liquid guiding groove 36, and then passes through the shaft guiding liquid tank. 38 flows to the liquid chamber 18.

[0026] 应当理解的是，在所示的实施例中，径向导液槽 36设置为两条，在其他实施例中，根据具体设计需求，径向导液槽 36也可以设置为多条，每条径向导液槽 36 都与轴向导液槽 38连通，使得甩向径向导液槽 36的渗漏液能够汇流至轴向导液槽 38。 [0026] It should be understood that, in the illustrated embodiment, the radial liquid guiding grooves 36 are provided in two. In other embodiments, the radial liquid guiding grooves 36 may also be provided in multiple pieces according to specific design requirements. The radial flow guiding grooves 36 are all in communication with the shaft guiding liquid grooves 38 so that the leakage liquid from the radial flow guiding grooves 36 can be merged to the shaft guiding liquid grooves 38.

[0027] 本实施例中，中心部 34与环形空间 32连通，而轴向导液槽 38设置在中心部 34的径向内侧的内表面上，轴向导液槽 38的出口也设置为与环形空间 32连通。因此，当转轴 12转动吋，渗透液先是从轴套 26的外表面 22甩进径向导液槽 36中，然后经轴向导液槽 38流向环形空间 32内，再从环形空间 32的通孔 31流回液体腔 18 内。 In the present embodiment, the center portion 34 is in communication with the annular space 32, and the shaft guiding liquid groove 38 is disposed on the radially inner surface of the center portion 34, and the outlet of the shaft guiding liquid groove 38 is also disposed to be in the annular space. 32 connected. Therefore, when the rotating shaft 12 is rotated, the permeate first enters the radial liquid guiding groove 36 from the outer surface 22 of the sleeve 26, and then flows into the annular space 32 through the shaft guiding liquid groove 38, and then passes through the through hole 31 of the annular space 32. It flows back into the liquid chamber 18.

[0028] 应当理解的是，上述高速电机的滑动轴承的实施例仅为本发明的优选实施方式，本发明当不以此为限。本发明的液体密封结构也可以广泛应用于做旋转运动机械的液体密封，如齿轮泵，泡油 /水冷却等。 [0028] It should be understood that the embodiment of the sliding bearing of the above high speed motor is only a preferred embodiment of the present invention. The invention is not limited thereto. The liquid sealing structure of the present invention can also be widely applied to liquid sealing of rotary motion machines, such as gear pumps, foam/water cooling, and the like.

[0029] 综上所述，本发明提供了一种转动机械的液体密封结构。在液体腔内设置一密封件，利用封盖封住液体腔，封盖转动套设在密封件的壁面上，在封盖的安装孔内壁面上设置导液槽，导液槽与液体腔连通。密封件随转轴转动吋，渗漏至密封件壁面的渗漏液，例如润滑油能够在离心力作用下被甩进导液槽，再经导液槽流回液体腔，进行回收，有效起到密封的作用。而且转轴的转速越大，密封效果越好。此外，密封件与封盖之间还形成一与液体腔连通的环形空间，密封件的环形凸缘与封盖的中心部局部重叠，减小液体腔与环形空间的连通口，可进一步较小油泄漏的几率。本发明的液体密封机构构思新颖，设计巧妙，可有效防止转动机械，特别是高速电机的油泄漏问题。 In summary, the present invention provides a liquid sealing structure for a rotating machine. A sealing member is arranged in the liquid chamber, and the liquid chamber is sealed by the sealing cover, and the sealing cover is sleeved on the wall surface of the sealing member, and a liquid guiding groove is arranged on the inner wall surface of the mounting hole of the sealing cover, and the liquid guiding groove is connected with the liquid chamber . The sealing member rotates with the rotating shaft, and the leakage liquid leaks to the wall surface of the sealing member. For example, the lubricating oil can be sucked into the liquid guiding tank under the action of centrifugal force, and then flows back to the liquid chamber through the liquid guiding tank for recovery, effectively sealing. The role. Moreover, the greater the rotational speed of the shaft, the better the sealing effect. In addition, an annular space communicating with the liquid chamber is formed between the sealing member and the cover, and the annular flange of the sealing member partially overlaps the central portion of the sealing cover to reduce the communication port between the liquid chamber and the annular space, which can be further reduced. The probability of oil leakage. The liquid sealing mechanism of the invention has novel concept and ingenious design, and can effectively prevent the oil leakage problem of the rotating machinery, especially the high speed motor.

[0030] 本文所描述的概念在不偏离其精神和特性的情况下可以实施成其它形式。所公幵的具体实施例应被视为例示性而不是限制性的。因此，本发明的范围是由所附的权利要求，而不是根据之前的这些描述进行确定。在权利要求的字面意义及等同范围内的任何改变都应属于这些权利要求的范围。 [0030] The concepts described herein may be embodied in other forms without departing from the spirit and scope of the invention. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims rather Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims

权利要求书 Claim

[权利要求 1] 一种转动机械的液体密封结构，包括转动套设于一转轴上的封盖，所述转轴从一液体腔内延伸至所述液体腔外，所述封盖固定至所述液体腔以封住所述液体腔，其特征在于，所述封盖具有与所述转轴安装的安装孔，所述安装孔内壁面设有导液槽，所述液体密封结构还包括位于所述液体腔内的密封件，所述密封件固定安装于所述转轴上以随所述转轴转动，所述密封件具有一靠近所述导液槽的壁面，在所述密封件随所述转轴转动吋，渗漏至所述密封件的壁面的渗漏液能够在离心力的作用下被甩向所述导液槽并经所述导液槽流回至所述液体腔。 [Claim 1] A liquid sealing structure for a rotating machine, comprising a cover that is rotatably sleeved on a rotating shaft, the rotating shaft extends from a liquid chamber to the outside of the liquid chamber, and the cover is fixed to the a liquid chamber for sealing the liquid chamber, wherein the cover has a mounting hole mounted on the rotating shaft, a liquid guiding groove is disposed on an inner wall surface of the mounting hole, and the liquid sealing structure further comprises a sealing member in the liquid chamber, the sealing member is fixedly mounted on the rotating shaft to rotate with the rotating shaft, the sealing member has a wall surface adjacent to the liquid guiding groove, and the sealing member rotates with the rotating shaft渗, the leakage liquid leaking to the wall surface of the seal member can be swung to the liquid guiding tank by the centrifugal force and flow back to the liquid chamber through the liquid guiding tank.

[权利要求 2] 如权利要求 1所述的转动机械的液体密封结构，其特征在于，所述密封件包括具有安装孔的环形主体以及沿所述环形主体内周缘轴向延伸的轴套，所述密封件壁面为所述轴套的外表面，所述封盖转动套设在所述轴套的外表面上。 [Claim 2] The liquid sealing structure of the rotary machine according to claim 1, wherein the seal member comprises an annular body having a mounting hole and a sleeve extending axially along an inner circumference of the annular body, The wall surface of the seal is the outer surface of the sleeve, and the cover is rotatably sleeved on the outer surface of the sleeve.

[权利要求 3] 如权利要求 2所述的转动机械的液体密封结构，其特征在于，所述导液槽包括径向导液槽和与所述径向导液槽连通的轴向导液槽，所述渗漏液被甩向所述径向导液槽，然后经所述轴向导液槽流回到所述液体腔。 [Claim 3] The liquid sealing structure of the rotating machine according to claim 2, wherein the liquid guiding groove comprises a radial liquid guiding groove and a shaft guiding liquid tank communicating with the radial liquid guiding groove, The leaking liquid is forced to the radial liquid guiding tank and then flows back to the liquid chamber through the shaft guiding liquid tank.

[权利要求 4] 如权利要求 3所述的转动机械的液体密封结构，其特征在于，所述径向导液槽为环形，沿所述封盖的安装孔内壁面的圆周方向延伸。 [Claim 4] The liquid sealing structure of the rotary machine according to claim 3, wherein the radial guiding liquid groove is annular and extends in a circumferential direction of the inner wall surface of the mounting hole of the cover.

[权利要求 5] 如权利要求 4所述的转动机械的液体密封结构，其特征在于，所述径向导液槽有多条，每条径向导液槽皆与所述轴向导液槽连通，使得甩向所述径向导液槽的渗漏液能够汇流至所述轴向导液槽。 [Claim 5] The liquid sealing structure of the rotating machine according to claim 4, wherein the plurality of radial liquid guiding grooves are connected, and each of the radial liquid guiding grooves communicates with the shaft guiding liquid groove, so that The leakage liquid directed to the radial liquid guiding tank can be condensed to the shaft guiding liquid tank.

[权利要求 6] 如权利要求 4所述的转动机械的液体密封结构，其特征在于，所述径向导液槽有多条，每条径向导液槽皆与所述轴向导液槽连通，使得甩向所述径向导液槽的渗漏液能够汇流至所述轴向导液槽。 [Claim 6] The liquid sealing structure of the rotating machine according to claim 4, wherein the plurality of radial liquid guiding grooves are connected, and each of the radial liquid guiding grooves communicates with the shaft guiding liquid groove, so that The leakage liquid directed to the radial liquid guiding tank can be condensed to the shaft guiding liquid tank.

[权利要求 7] 如权利要求 6所述的转动机械的液体密封结构，其特征在于，所述环形主体的径向外缘朝所述封盖延伸形成一环形凸缘，所述空间为环形空间，由所述环形主体、所述环形凸缘、所述轴套和所述封盖合围形成，所述环形凸缘设有通孔，所述通孔连通所述环形空间与所述液体腔。 [Claim 7] The liquid sealing structure of the rotating machine according to claim 6, wherein a radial outer edge of the annular body extends toward the cover to form an annular flange, and the space is an annular space Enclosing the annular body, the annular flange, the sleeve and the cover The annular flange is provided with a through hole that communicates with the annular space and the liquid chamber.

[权利要求 8] 如权利要求 7所述的转动机械的液体密封结构，其特征在于，所述导液槽包括沿所述封盖的安装孔内壁面的圆周方向延伸的多条径向导液槽和与所述径向导液槽连通的轴向导液槽，所述渗漏液被甩向所述径向导液槽，然后经所述轴向导液槽流到所述环形空间。 [Claim 8] The liquid sealing structure of the rotary machine according to claim 7, wherein the liquid guiding groove comprises a plurality of radial liquid guiding grooves extending in a circumferential direction of an inner wall surface of the mounting hole of the cover And a shaft guiding liquid tank communicating with the radial liquid guiding groove, the leakage liquid is swung to the radial liquid guiding tank, and then flows to the annular space through the shaft guiding liquid tank.

[权利要求 9] 如权利要求 7所述的转动机械的液体密封结构，其特征在于，所述封盖包括一朝向所述密封件凸起的中心部，所述中心部的外径小于所述环形凸缘的内径，所述环形凸缘和所述中心部在轴向上局部重叠。 [Claim 9] The liquid sealing structure of the rotating machine according to claim 7, wherein the cover includes a central portion that is convex toward the sealing member, and an outer diameter of the central portion is smaller than the An inner diameter of the annular flange, the annular flange and the central portion partially overlapping in the axial direction.

[权利要求 10] 如权利要求 1-9任意一项所述的转动机械的液体密封结构，其特征在于，所述液体腔为容纳润滑油的油腔。 [Claim 10] The liquid sealing structure of the rotary machine according to any one of claims 1 to 9, wherein the liquid chamber is an oil chamber for containing lubricating oil.