WO2019095950A1 - 一种带辅助润滑装置的机械密封 - Google Patents

一种带辅助润滑装置的机械密封 Download PDF

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Publication number
WO2019095950A1
WO2019095950A1 PCT/CN2018/111677 CN2018111677W WO2019095950A1 WO 2019095950 A1 WO2019095950 A1 WO 2019095950A1 CN 2018111677 W CN2018111677 W CN 2018111677W WO 2019095950 A1 WO2019095950 A1 WO 2019095950A1
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moving ring
ring
mechanical seal
sleeve
driving
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PCT/CN2018/111677
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English (en)
French (fr)
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毛炜
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北京格瑞福机电科技有限公司
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Priority to US16/765,163 priority Critical patent/US11402022B2/en
Publication of WO2019095950A1 publication Critical patent/WO2019095950A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal

Definitions

  • the invention relates to a mechanical seal for a pump, in particular to a mechanical seal of an automobile water pump with an auxiliary lubrication device.
  • automotive water pump seals generally use mechanical end face seals, commonly known as water seals, consisting of a pair of friction pairs, moving ring drive sleeves, static ring cages, races, wave springs (or coil springs), and several rubber-assisted seals.
  • water seals consisting of a pair of friction pairs, moving ring drive sleeves, static ring cages, races, wave springs (or coil springs), and several rubber-assisted seals.
  • friction pair materials graphite/silicon carbide (or alumina ceramic instead of silicon carbide) and silicon carbide/silicon carbide (commonly known as "double carbon water seal").
  • the graphite/silicon carbide friction pair combination has a slightly better self-lubricating property, it has poor resistance to foreign matter, poor wear resistance, easy damage to the sealing surface, and low service life; the silicon carbide/silicon carbide friction pair has outstanding resistance to foreign matter, and the coolant Poor sensitivity (good tolerance), long life, but poor resistance to dry friction, and easy to produce noise.
  • the high-speed rotation of the pump impeller forms a high-pressure zone around the impeller blades, and the coolant is pumped out.
  • the centrifugal action of the coolant causes the coolant in the vortex area behind the impeller (the water seal is just installed in this part) to be partially removed, forming a certain negative.
  • Pressure which leads to the lack of coolant around the mechanical seal, resulting in no friction or noise from the coolant in the mechanical seal, damage to the sealing surface, and thermal overload causes the auxiliary rubber seal to ablate, causing the mechanical seal (water seal) to fail. The noise generated seriously affects the comfort of the person.
  • the invention is based on this market demand and developed a mechanical seal with an auxiliary lubrication function.
  • the invention can well improve the lubrication state around the water seal, so that the water seal is always in a good lubrication state, thereby eliminating various failure phenomena caused by dry friction. At the same time, it also eliminates the cause of noise and solves the problem of noise generation.
  • the object of the present invention is to provide a mechanical seal water seal, which can improve the lubrication state around the mechanical seal, so that the mechanical seal is always in a good lubrication state, and at the same time, the friction pair is cooled, thereby eliminating dry friction.
  • the leakage also eliminates the cause of noise and solves the problem of noise generation.
  • the technical solution of the invention is: the mechanical seal of the auxiliary lubricating device of the invention, comprising a pair of friction pairs, a moving ring drive sleeve, a static ring holder, a water seal seat ring, a wave spring (or a coil spring), a retaining ring, a ripple
  • the tube, the moving ring pad and the like are characterized in that the moving ring driving sleeve is fixed on the bearing and the motor shaft, the shaft belt moving ring driving sleeve rotates, the moving ring driving sleeve has a plurality of sets of blades, and the moving ring driving sleeve drives the moving ring
  • the blade spins the cooling medium around the mechanical seal to the contact area of the friction pair, ensuring that the friction pair is always in a lubrication and cooling state, and solves the ablation of the auxiliary sealing rubber piece caused by the dry friction of the mechanical seal friction pair, thereby causing the machine
  • the boss cooperates with the moving ring in the friction pair to drive the moving ring to rotate, and the corresponding moving ring portion of the blade inlet is completely Exposed to the outside, the blade directly sprays the cooling medium onto the moving ring and the friction pair contact area, solving the noise problem caused by mechanical seal cooling and dry friction.
  • the mechanical seal sealing ring drive sleeve is designed with cooling blades to ensure sufficient lubrication and cooling medium on the mechanical seal friction pair, so that the friction pair is fully cooled and lubricated, which greatly improves the service life of the mechanical seal and reduces noise.
  • the moving coil drive sleeve is processed by variable diameter, which not only ensures sufficient driving force of the moving ring, but also exposes the moving ring part to the cooling medium, which is beneficial to quickly reduce the temperature rise of the moving ring due to friction and prolong the dynamic ring auxiliary rubber.
  • the life of the seal reduces the maintenance cost of the part.
  • Figure 1 is a front cross-sectional view of the present invention.
  • Figure 2 is a right side view of the present invention.
  • Figure 3 is a plan view of the present invention.
  • Figure 4 is a front cross-sectional view showing another blade structure of the present invention.
  • Figure 5 is a top plan view of another blade structure of the present invention.
  • a mechanical seal with an auxiliary lubricating device of the present invention comprises a pair of friction vice moving rings 9 and a stationary ring 8 , a moving ring driving sleeve 7 , a stationary ring retainer 5 , and a water seal seat 1 .
  • the wave spring (or coil spring) 3, the retaining ring 2, the bellows 4, the moving ring pad 10 and the like are composed.
  • the moving ring driving sleeve 7 is formed with blades 6 , and the moving ring driving sleeve 7 rotates at a high speed.
  • the reducing flange 72 is used to rotate the movable ring 9 synchronously, and the moving ring 9 and the stationary ring 8 ensure the friction pair through the wave spring 3 .
  • the outer surface of the static ring 8 is connected together by the rubber bellows 4 and the static ring holder 5, and the corrugated tube acts as a sealing.
  • the inner surface of the static ring 8 is fixed to the water seal seat 1 through the positioning boss.
  • the blade 6 directly sprays the cooling medium onto the moving ring and the friction pair contact area, thereby cooling and lubricating the friction pair, and solving the noise problem caused by insufficient lubrication.
  • the blade 6 along the moving ring drive sleeve 7 variable diameter large end of the outer circle has one or more circulating water tanks 63 and one or more blade sinks 62, moving ring drive sleeve 7 High-speed rotation, the cooling medium outside the moving ring drive sleeve 7 is sprayed onto the friction pair by the blades.
  • the moving ring drive sleeve 7 is punched with a plurality of grooves 71, the material of the groove is unfolded to enclose the moving ring, and the moving ring driving sleeve 7 is extruded to form one or more semi-circular arcs.
  • the boss cooperates with the moving ring to drive the moving ring to rotate at a high speed. Since the boss partially covers the moving ring, the cooling medium on the blade 6 is directly sprayed on the moving ring, and the friction surface of the moving ring is directly cooled and lubricated.
  • FIG. 4 is a front cross-sectional view showing another blade structure of the present invention.
  • the outer ring of the moving ring driving sleeve is provided with a ⁇ -shaped impeller 6, and the ⁇ -shaped impeller 6 directly rotates the cooling medium to the contact surface area of the friction ring of the moving and static ring. It acts to cool and lubricate the friction pair.
  • FIG. 5 is a plan view showing another blade structure of the present invention.
  • the front end of the ⁇ -shaped impeller 6 is opened, and the cooling medium is sucked into the friction surface to achieve cooling and lubricating action.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

一种带辅助冷却润滑装置的机械密封，包括动环（9）、静环（8）、动环驱动套（7）、静环保持架（5）、水封座圈（1）、波形弹簧（3）、保持环（2）、波纹管（4）和动环衬垫（10），动环驱动套（7）固定在轴上，轴带动动环驱动套（7）旋转，动环驱动套（7）上带有多个叶片（6），在动环驱动套（7）驱动动环（9）旋转的同时，叶片（6）将机械密封周围的冷却介质旋压向摩擦副接触区域，保证摩擦副始终处于润滑和冷却状态；同时，动环驱动套（7）通过变径设计带过渡台阶，台阶端面上有多处开窗，动环驱动套（7）变径既满足了驱动动环（9）的功能，同时又使动环（9）部分直接暴露在冷却液中，便于动环（9）的冷却，台阶端面开窗首先是为了形成驱动爪，同时形成多处窗口便于被叶片（6）包围且位于水封周围的冷却液与外围冷却液流通，保持水封周围的温度稳定。通过上述机械密封，能够迅速降低摩擦副的温度，避免因干摩擦引起辅助密封橡胶件烧蚀而导致密封失效，提高了机械密封的使用寿命，同时也解决了机械密封的噪声问题。

Description

一种带辅助润滑装置的机械密封 技术领域
本发明涉及的是泵用机械密封，尤其是一种带辅助润滑装置的汽车水泵机械密封。
背景技术
目前汽车水泵密封普遍采用机械端面密封，俗称为水封，由一对摩擦副、动环驱动套、静环保持架、座圈、波形弹簧(或者螺旋弹簧)、以及若干橡胶辅助密封组成。摩擦副材料通常有两种组合：石墨/碳化硅(或用氧化铝陶瓷代替碳化硅)和碳化硅/碳化硅(俗称“双碳水封”)。石墨/碳化硅摩擦副组合虽然自润滑性能稍好，但抗异物能力差，耐磨性能差，密封面容易损坏，使用寿命低；碳化硅/碳化硅摩擦副组合抗异物能力突出，对冷却液敏感性差(耐受性好)，寿命长，但是抗干摩擦能力差，且容易产生噪声。
水泵叶轮高速旋转在叶轮叶片四周形成高压区，将冷却液泵出，冷却液的离心作用使得叶轮背后涡区(水封恰好安装在这个部位)内的冷却液被部分抽走，形成一定的负压，进而导致机械密封周围冷却液的缺失，导致机械密封无冷却液产生干摩擦或噪声，密封面损坏，进而热过载导致辅助橡胶密封烧蚀，引起机械密封(水封)失效性泄露，同时产生的噪音严重影响人员舒适性。
本发明的正是基于这一市场需求而开发出来的一种带有辅助润滑功能的机械密封。该发明能很好地改善水封周围的润滑状态，使水封始终处于良好的润滑状态，进而消除干摩擦引起的各种失效现象。同时也消除了产生噪声的原因，解决了产生噪声的难题。
发明内容
本发明目的在于提供一种机械密封水封，该机械密封能很好地改善机械密封周围的润滑状态，使机械密封始终处于良好的润滑状态中，同时对摩擦副进行冷却，进而消除干摩擦引起的泄露，同时也消除了产生噪声的原因，解决了产生噪声的难题。
本发明的技术方案是：本发明的辅助润滑装置的机械密封，包括一对摩擦副、动环驱动套、静环保持架、水封座圈、波形弹簧(或者螺旋弹簧)、保持环、波纹管、动环衬垫等组成，其特征是动环驱动套固定在轴承及电机轴上，轴带动动环驱动套旋转，动环驱动套上做有多组叶片，动环驱动套驱动动环旋转的同时，叶片将机械密封周围的冷却介质旋压向摩擦副接触区域，保证摩擦副始终处于润滑和冷却状态，解决了机械密封摩擦副因干摩擦引起的辅助密封橡胶件烧蚀进而导致机械密封失效的情况；同时，动环驱动套通过变径设计有翻边凸台和叶片进水口，凸台同摩擦副中的动环配合，驱动动环旋转，叶片进水 口对应的动环部位完全暴露在外，叶片直接将冷却介质喷射到动环上和摩擦副接触区域，解决了机械密封冷却和干摩擦产生的噪声问题。
本发明的优点：
1、机械密封动环驱动套上设计有冷却叶片，确保机械密封摩擦副上有足够的润滑和冷却介质，使摩擦副得到充分的冷却和润滑，大大提高了机械密封的使用寿命、减少噪音。
2、动圈驱动套通过变径处理，既保证了足够的动环驱动力，同时又能将动环部分暴露在冷却介质中，利于迅速降低动环由于摩擦的温升，延长动环辅助橡胶密封件的寿命，降低部件维护费用。
3、通过变径台阶上开槽，使得驱动叶片包围的水封周围的冷却介质能和外围介质循环，使摩擦副直接同外围冷却介质充分交流，对摩擦副起到降温和润滑作用，提高使用寿命。
下面结合附图详细说明本发明的具体实施方式。
附图说明
附图1是本发明的主剖视图。
附图2是本发明的右视图。
附图3是本发明的俯视图。
附图4是本发明的另一种叶片结构的主剖视图。
附图5是本发明的另一种叶片结构的俯视图。
具体实施方式
如图1所示，本发明的一种带辅助润滑装置的机械密封，包括一对摩擦副动环9和静环8、动环驱动套7、静环保持架5、水封座圈1、波形弹簧(或者螺旋弹簧)3、保持环2、波纹管4、动环衬垫10等组成。动环驱动套7上制作有叶片6，动环驱动套7高速旋转，通过变径设计有翻边凸台72带动动环9同步旋转，动环9和静环8通过波形弹簧3保证摩擦副平面密封，静环8的外表面又通过橡胶波纹管4和静环保持架5连接在一起，波形管起到密封作用，静环8的内表面通过定位凸台同水封座圈1相连固定，叶片6直接将冷却介质喷射到动环上和摩擦副接触区域,起到对摩擦副的冷却和润滑作用，同时解决了因润滑不足而引起的噪声问题。
如图2所示为本发明的右视图，叶片6沿动环驱动套7变径大端外圆开有1个或多个循环水槽63和1个或多个叶片水槽62，动环驱动套7高速旋转，通过叶片将动环驱动套7外部的冷却介质喷射到摩擦副上。
如图3所示为本发明的俯视图，动环驱动套7上冲有多个槽71，槽的材料展开包住动环，同时动环驱动套7上挤压成型一个或多个半圆弧凸台，同动环配合，驱动动环高速旋转，由于凸台部分包覆动环，叶片6上冷却介质直接喷射动环上，对动环摩擦面直接进行冷却和润滑。
如图4所示为本发明的另一种叶片结构的主剖视图，动环驱动套外圈开有锲型叶轮6，锲型叶轮6直接将冷却介质旋压到动静环摩擦副接触面区域,起到对摩擦副的冷却和润滑作用。
如图5所示为本发明的另一种叶片结构的俯视图，锲型叶轮6前端开口，冷却介质吸入到摩擦面上，同样实现冷却润滑作用。

Claims (7)

  1. 一种带辅助冷却润滑装置的机械密封，包括一对摩擦副、动环驱动套、静环保持架、座圈、波形弹簧、保持环、波纹管、动环衬垫等组成，其特征是动环驱动套固定在轴承(或电机)轴上，轴带动动环驱动套旋转，动环驱动套上带有多个(1个及以上)叶片，动环驱动套驱动动环旋转的同时，叶片将机械密封周围的冷却介质旋压向摩擦副接触区域，保证摩擦副始终处于润滑和冷却状态。同时，动环驱动套通过变径设计带过渡台阶，实现变径，台阶端面上有多处开窗，驱动套变径既满足了驱动动环的功能，同时又使动环部分直接暴露在冷却液中，便于动环的冷却。台阶端面开窗首先是为了形成动环驱动爪，同时形成多处窗口便于叶片包围的水封周围的冷却液和外围冷却液的流通，保持水封周围稳定的温度环境。
  2. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，其特征在于动环驱动套的叶片是一片或多片以上，叶片沿动环驱动套变径后大外圆分布，叶片的轴向中心位置对应摩擦副接合面中间位置。
  3. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，其特征在于动环驱动套上叶片的形状为直线型、螺旋型、圆弧型或月牙型。叶片沿轴向两端剪开拉伸成型，或者采用叶片沿轴向两端不剪开直接拉伸成型，或焊接成型，沿驱动套外圆生成的各种叶片。
  4. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，叶片喷射冷却介质的方向作用在摩擦副上，叶片位置对应摩擦副接合面。
  5. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，动环驱动套上变径凸台处设计有两个或多个半圆弧驱动爪，用于固定并驱动摩擦副中的动环。驱动爪形状可以是直面的以及曲面的。
  6. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，动环驱动套沿动环外径处通过变径处理形成台阶，台阶端面开窗设计，摩擦副接触区域冷却介质同外部介质流通。台阶的形式是垂直于轴向方向的直台阶，或任意角度的斜台阶。
  7. 根据权利要求1所述的带辅助冷却润滑装置的机械密封，动环驱动套上开有一个或多个进水口。
PCT/CN2018/111677 2017-11-19 2018-10-24 一种带辅助润滑装置的机械密封 WO2019095950A1 (zh)

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CN107654655A (zh) * 2017-11-19 2018-02-02 北京格瑞福机电科技有限公司 一种带辅助冷却润滑装置的机械密封
CN113366249B (zh) * 2019-01-31 2023-12-29 密凯加机械密封件股份公司 用于电动机的中空轴的防倾斜密封件

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