WO2018166391A1 - 水泵轴承 - Google Patents

水泵轴承 Download PDF

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Publication number
WO2018166391A1
WO2018166391A1 PCT/CN2018/078367 CN2018078367W WO2018166391A1 WO 2018166391 A1 WO2018166391 A1 WO 2018166391A1 CN 2018078367 W CN2018078367 W CN 2018078367W WO 2018166391 A1 WO2018166391 A1 WO 2018166391A1
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WO
WIPO (PCT)
Prior art keywords
water pump
support member
inner support
pump bearing
opening
Prior art date
Application number
PCT/CN2018/078367
Other languages
English (en)
French (fr)
Inventor
唐中伍
赵燕华
杨道远
许毅
陈志国
Original Assignee
舍弗勒技术股份两合公司
唐中伍
赵燕华
杨道远
许毅
陈志国
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Publication date
Application filed by 舍弗勒技术股份两合公司, 唐中伍, 赵燕华, 杨道远, 许毅, 陈志国 filed Critical 舍弗勒技术股份两合公司
Priority to DE112018001294.8T priority Critical patent/DE112018001294T5/de
Publication of WO2018166391A1 publication Critical patent/WO2018166391A1/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/726—Sealings with means to vent the interior of the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid pumps
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/49—Bearings with both balls and rollers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps

Definitions

  • the invention relates to the technical field of bearings, in particular to a water pump bearing.
  • a conventional water pump bearing includes: a shaft; an outer ring surrounding the shaft; a seal on both sides of the axial direction, surrounding the shaft, and forming a sealed cavity with the shaft and the outer ring, and sealing grease in the sealed cavity;
  • a rolling body is located within the sealed cavity.
  • the shaft and the outer ring can be relatively rotated by the rolling bodies, wherein the grease acts as a lubrication between the rolling bodies and the shaft and between the rolling elements and the outer ring.
  • the water pump bearing belongs to a kind of high-speed bearing.
  • the shaft runs at high speed, it will generate high temperature in the sealed chamber.
  • the gas in the sealed chamber is heated and expanded by high temperature to form a high pressure in the sealed chamber.
  • the high temperature and high pressure will accelerate the damage of nearby parts. Ageing.
  • high pressure may affect the seal between the seal and the shaft and between the seal and the outer ring to form a gap such that grease in the seal cavity leaks out of the gap.
  • the problem solved by the present invention is that the existing water pump bearing forms high temperature and high pressure in the sealing cavity for accommodating the rolling elements during high speed operation.
  • the present invention provides a water pump bearing.
  • the water pump bearing comprises: an inner support member; an outer support member surrounding the inner support member; the seal member being located on both axial sides of the water pump bearing and forming a sealed cavity with the inner support member and the outer support member; a plurality of rolling bodies in the cavity, the outer support and the inner support are relatively rotated by the rolling body; the inner support is provided with a venting portion to communicate the sealed cavity and the outside.
  • the gas expanded in the sealed chamber due to the high temperature can be discharged from the ventilating portion to the outside, thereby reducing the pressure in the sealed chamber and avoiding damage and aging of components near the water pump bearing.
  • this can avoid a gap between the seal and the inner support, between the seal and the outer support, prevent grease leakage in the sealed cavity, and ensure normal operation of the water pump bearing.
  • the venting portion is a venting tube; or the venting portion is a hole formed in one of the inner support member and the outer support member; or the venting portion is located at the inner support member A sealing gap between the outer support and the outer support.
  • the inner support comprises an inner ring forming a boundary of the sealed cavity; or the inner support comprises a shaft forming a boundary of the sealed cavity.
  • a filter member is disposed within the venting portion, the filter member being adapted to filter contaminants outside the sealed chamber.
  • the filter member can effectively block external pollutants, especially large-sized pollutants entering the sealing cavity through the ventilating portion to contaminate the grease.
  • the inner support has a first surface located within the sealed cavity and a second surface located outside the sealed cavity; the venting portion is disposed in the inner support and has a a first opening of the first surface and a second opening formed in the second surface.
  • the inner support can be rotated and the outer support can be fixed.
  • the inner support rotates at a high speed, the grease in the sealed chamber is sucked to the outer support due to the centrifugal force, which can prevent the grease from leaking from the first opening into the vent portion.
  • the inner support can be fixed and the outer support can be fixed.
  • the venting portion is provided on the inner support member, which can effectively prevent grease leakage.
  • the first surface is divided into a working surface and a non-working surface, the working surface supporting the rolling body; the first opening is formed on the non-working surface.
  • the rolling body can be prevented from clogging the first opening, which is advantageous for the inflation airflow to flow out through the first opening.
  • the first opening comprises at least two, evenly arranged along the circumferential direction of the inner support.
  • the first openings are evenly arranged in the circumferential direction, which can maintain the radial balance of the inertial force of the inner support during the rotation, and prevent the inner support from being deflected due to the radial inertial force imbalance.
  • the second surface includes a bearing mounting surface and a non-bearing mounting surface, and the second opening is formed on the non-bearing mounting surface.
  • the bearing mounting surface is used to mount the water pump bearing to other components, it is inevitably contacted, overlapped, and the like with other components.
  • the second opening is formed on the non-mounting surface to prevent the second opening from being blocked by other components, or the nearby components affect the flow of the airflow near the second opening, thereby ensuring the normal flow of the airflow in the ventilating portion.
  • the axial end surface of the inner support member serves as the non-bearing mounting surface
  • the ventilation portion includes: a first segment, along the axial direction of the water pump bearing, from the first opening into the sealing cavity Extending; a second segment coupled to the first segment and extending radially along the water pump bearing to the second opening.
  • the rolling body comprises two columns, the first opening being located between two rows of rolling bodies.
  • the rolling bodies may be only one column.
  • Figure 1 is a cross-sectional view of a water pump bearing according to a first embodiment of the present invention, the cross section of which passes through the central axis of the water pump bearing;
  • Figure 2 is a cross-sectional view of a water pump bearing of a second embodiment of the present invention, the section passing through the central axis of the water pump bearing.
  • a water pump bearing of an embodiment comprises: a shaft 1; an outer ring 2, a surrounding shaft 1; a sealing member 3, located on both axial sides of the water pump bearing, and forming a sealed cavity 4 with the shaft 1 and the outer ring 2; A plurality of rolling bodies 5 located in the sealed chamber 4, the shaft 1 and the outer ring 2 are relatively rotated by the rolling bodies 5.
  • the shaft 1 serves as an inner support for supporting the rolling bodies 5 and provides the required inner race of the rolling bodies 5, which acts as an outer support for supporting the rolling bodies 5 and provides the outer races required for the rolling bodies 5.
  • the shaft 1 has a first surface 11 located within the sealed chamber 4 and a second surface 12 located outside of the sealed chamber 4. Wherein, the shaft 1 is provided with a venting portion 6 for opening the chamber 4 and the outside, and the venting portion 6 has a first opening 6a formed on the first surface 11 and a second opening 6b formed on the second surface 12.
  • the inner support may comprise a shaft 1 forming a boundary of the sealed cavity 4.
  • the rolling elements 5 are in direct contact with the shaft 1.
  • the inner support can include an inner ring that forms a boundary of the sealed cavity, or can further include a shaft that passes through the central bore of the inner ring.
  • the inner ring provides the inner raceway required for the rolling body to directly contact the rolling body, and the venting portion may be formed in the inner ring, and at this time, the second opening may be formed at one end surface of the inner ring at the axial end.
  • the shaft does not act as a boundary of the sealed cavity, and the inner ring and the shaft can rotate synchronously.
  • the outer ring 2 is usually fixed and the shaft 1 is rotated at a high speed.
  • the shaft 1 is rotated at a high speed, the grease in the sealed chamber 4 is sucked to the outer ring 2 due to the centrifugal force, which prevents the grease from leaking from the first opening 6a into the vent portion 6.
  • the venting portion is provided on the inner support member, which can effectively prevent grease leakage.
  • the venting portion may be provided in the outer support member, except that the venting portion 6 may be provided outside the inner support member. At this time, a corresponding blocking structure can be designed in the sealed cavity to prevent the grease from flowing into the venting portion.
  • the venting portion 6 is a hole formed in the shaft 1.
  • the venting portion may be a hole formed in one of the inner support member and the outer support member.
  • the venting portion may be a venting tube, for example, a venting tube is provided through one of the inner support, the outer support and the seal.
  • the venting portion may be a sealing gap between the inner support member and the outer support member. The sealing gap can block external pollutants from entering the sealing cavity to a certain extent, and block the leakage of grease in the sealing cavity.
  • the seal gap may be located between the seal and the inner support or between the seal and the outer support.
  • the first surface 11 can be divided into a working surface (obscured by the rolling bodies 5) and a non-working surface 110.
  • the working surface supports the rolling bodies 5, and the first opening 6a can be formed on the non-working surface 110.
  • the working surface can be used as an inner raceway, and the rolling body 5 rolls along the working surface and is in direct contact with the working surface.
  • the first opening 6a is disposed on the non-working surface 110, so that the rolling body 5 can be prevented from clogging the first opening 6a, and the ventilation inside the venting portion 6 is not properly ventilated, and even the venting portion 6 is invalid.
  • the rolling body 5 can include two rows, the left row of rolling elements 5 is a needle roller, and the right row of rolling elements 5 is a ball.
  • the first surface 11 may comprise a working surface at both axial ends, the first surface portion between the two working surfaces being a non-working surface 110, the first opening 6a being located between the two rows of rolling bodies 5 .
  • the second surface 12 can be divided into an outer peripheral surface 121 and an axial end surface 122, wherein one of the outer peripheral surface 121 and the axial end surface 122 can serve as a bearing mounting surface, and the other can be used as a non-bearing mounting. surface.
  • the bearing mounting surface can be used to install the pump bearing to other components, and may contact or overlap with other components. In contrast, there is no contact or distance between the non-bearing mounting surface and other components.
  • the outer peripheral surface 121 can serve as a bearing mounting surface, and the water pump bearing can be mounted in the pump through the outer peripheral surface 121.
  • the second opening 6b may be formed on the non-bearing mounting surface of the axial end surface 122. This can prevent the components connected to the water pump bearing or the components near the water pump bearing from blocking the second opening 6b or obstructing the flow of the airflow near the second opening 6b, thereby ensuring the normal flow of the airflow in the ventilating portion 6.
  • the venting portion 6 may include: a first segment 61 extending from the second opening 6b into the sealed cavity 4 along the axial direction of the water pump bearing; and a second segment 62 connected to the first segment 61 and along the radial direction of the water pump bearing It extends to the first opening 6a.
  • the first segment 61 may be formed by punching in the axial direction from the second opening 6b
  • the second segment 62 may be formed by drilling from the first opening 6a in the radial direction
  • the first segment 61 and the second segment 62 overlap and connect to enhance the feasibility of the program.
  • a filter member 7 may be provided within the venting portion 60, and the filter member 7 may be disposed within the first section 610 adapted to filter contaminants outside of the sealed chamber 40.
  • the filter member 7 can prevent external large-scale contaminants from flowing into the sealed chamber 40 from the venting portion 60.
  • first opening 60a may include two or more pieces that are evenly arranged along the circumferential direction of the inner support 10.
  • Each of the first openings 60a corresponds to a second section 620, and thus the second section 620 can include two sections that are evenly spaced along the circumferential direction of the inner support 10 to form a diametrically opposed arrangement.
  • the inner support 10 is in rotation
  • the inertial force in the middle can be more balanced.

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

Abstract

一种水泵轴承，包括：内支承件；外支承件，环绕内支承件；密封件（3），位于水泵轴承轴向两侧，并与内支承件和外支承件形成密封腔（4）；位于密封腔（4）内的若干滚动体（5），外支承件和内支承件通过滚动体（5）相对转动，内支承件中设有通风部（6）以连通密封腔（4）和外界。在轴承高速运转时，密封腔内高温膨胀的气体通过通风部排放到外界，降低密封腔内的压力。

Description

水泵轴承
本申请要求2017年03月13日提交中国专利局、申请号为201710146672.7、发明名称为“水泵轴承”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及轴承技术领域，特别涉及一种水泵轴承。
背景技术
现有一种水泵轴承包括：轴；环绕轴的外圈；轴向两侧的密封件，环绕所述轴，且与所述轴和外圈形成密封腔，在密封腔内密封有润滑脂；若干滚动体，位于所述密封腔内。所述轴和外圈可以通过滚动体相对转动，其中润滑脂在滚动体与轴之间、滚动体与外圈之间起到润滑作用。
水泵轴承属于一种高转速轴承，在轴高速运转时，会在密封腔内产生高温，密封腔内的气体被高温加热膨胀而在密封腔内形成高压，高温高压会加速附近零部件的损伤、老化。尤其是，高压可能会影响密封件与轴之间、密封件与外圈之间的密封而形成间隙，使得密封腔内的润滑脂从间隙中泄露出去。
发明内容
本发明解决的问题是，现有水泵轴承在高速运转过程中，容纳滚动体的密封腔内会形成高温高压。
为解决上述问题，本发明提供一种水泵轴承。其中，水泵轴承包括：内支承件；外支承件，环绕内支承件；密封件，位于水泵轴承的轴向两侧，并与所述内支承件和外支承件形成密封腔；位于所述密封 腔内的若干滚动体，所述外支承件和内支承件通过所述滚动体相对转动；所述内支承件中设有通风部以连通所述密封腔和外界。
与现有技术相比，本技术方案具有以下优点：
在水泵轴承高速运转时，密封腔内因高温而膨胀的气体可以从通风部排放到外界，从而降低密封腔内的压力，避免水泵轴承附近的零部件损伤、老化。尤其是，这可以避免密封件与内支承件之间、密封件与外支承件之间形成间隙，防止密封腔内的润滑脂泄露，保证水泵轴承正常工作。
可选地，所述通风部为通风管；或者，所述通风部为形成于所述内支承件和外支承件中其中之一的孔；或者，所述通风部为位于所述内支承件和外支承件之间的密封间隙。
可选地，所述内支承件包括形成所述密封腔边界的内圈；或者，所述内支承件包括形成所述密封腔边界的轴。
可选地，在所述通风部内设有过滤件，所述过滤件适于过滤密封腔外的污染物。此时，过滤件可以有效阻挡外界污染物，尤其是大尺寸污染物经通风部进入密封腔而污染润滑脂。
可选地，所述内支承件具有位于所述密封腔内的第一表面及位于所述密封腔外的第二表面；所述通风部设于所述内支承件中，具有形成于所述第一表面的第一开口和形成于所述第二表面的第二开口。
在一种实施例中，内支承件可以旋转且外支承件可以固定。在内支承件高速旋转时，因离心力作用，密封腔内的润滑脂被甩到外支承件，这可以避免润滑脂从第一开口流入通风部而泄漏。
在另一种实施例中，内支承件可以固定且外支承件可以固定。在水泵轴承工作时，因离心力作用，润滑脂会沿着外支承件的内周面流动，而不会流入第一开口并泄漏。因此，通风部设于内支承件，可以有效避免润滑脂泄漏。
可选地，沿水泵轴承的轴向，所述第一表面分为工作面和非工作面，所述工作面支承所述滚动体；所述第一开口形成于所述非工作面。此时，在水泵轴承工作时，可以避免滚动体堵塞第一开口，这有利于膨胀气流经第一开口流出。
可选地，所述第一开口包括至少两个，沿所述内支承件的周向均匀排布。此时，第一开口沿周向均匀排布，这可以保持内支承件在旋转过程中的惯性力沿径向均衡，避免内支承件因径向惯性力失衡而发生偏转。
可选地，所述第二表面包括轴承安装面及非轴承安装面，所述第二开口形成于所述非轴承安装面。所述轴承安装面因用于将水泵轴承安装于其他部件，因此难免会与其他零部件发生接触、重叠等。相比之下，第二开口形成于非安装面，可以避免第二开口被其他零部件堵塞，或者附近零部件影响第二开口附近的气流流动，从而可以确保通风部内的气流正常流动。
可选地，所述内支承件的轴向端面作为所述非轴承安装面，所述通风部包括：第一段，沿水泵轴承的轴向，从所述第一开口向所述密封腔内延伸；第二段，与所述第一段连接并沿水泵轴承径向延伸至所述第二开口。
可选地，所述滚动体包括两列，所述第一开口位于两列滚动体之间。这提出一种实施例为双列滚动体轴承。除此之外的另一种实施例中，滚动体可以仅为一列。
附图说明
图1是本发明第一实施例的水泵轴承的剖面图，截面经过水泵轴承中轴线；
图2是本发明第二实施例的水泵轴承的剖面图，截面经过水泵轴承中轴线。
具体实施方式
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
第一实施例
参照图1，一种实施例的水泵轴承包括：轴1；外圈2，环绕轴1；密封件3，位于水泵轴承的轴向两侧，并与轴1和外圈2形成密封腔4；位于密封腔4内的若干滚动体5，轴1和外圈2通过滚动体5相对转动。轴1作为支承滚动体5的内支承件并提供滚动体5所需内滚道，外圈2作为支承滚动体5的外支承件并提供滚动体5所需外滚道。
轴1具有位于密封腔4内的第一表面11及位于密封腔4外的第二表面12。其中，轴1中设有通风部6以通密封腔4和外界，通风部6具有形成于第一表面11的第一开口6a和形成于第二表面12的第二开口6b。
在轴1高速运转时，会在密封腔4内产生高温，密封腔4内的气体被高温加热膨胀。此时膨胀后的气体可以从第一开口6a流入通风部6，并接着从第二开口6b排放到外界，从而降低密封腔4内的压力，避免水泵轴承附近的零部件损伤、老化。尤其是，这可以避免密封件3与轴1之间、密封件3与外圈2之间形成间隙，防止密封腔4内的润滑脂泄露，保证水泵轴承正常工作。
在一种实施例中，内支承件可以包括形成密封腔4边界的轴1。此时，滚动体5直接与轴1接触。除了这种方案外，内支承件可以包括形成密封腔边界的内圈，或者进一步可以包括从内圈中心孔穿过的轴。在这种情况下，内圈提供滚动体所需内滚道而直接与滚动体接触，通风部可以形成于内圈中，此时可以在内圈的轴向一端端面形成第二开口。此时，轴不作为密封腔边界，内圈与轴之间可以同步转动。
在水泵轴承中，通常外圈2固定且轴1高速旋转。在轴1高速旋转时，因离心力作用，密封腔4内的润滑脂被甩到外圈2，这可以避免润滑脂从第一开口6a流入通风部6而泄漏。
在另一种实施例的水泵轴承中，即使内支承件固定而外支承件旋转，因离心力作用，润滑脂会沿着外支承件的内周面流动，而不会流入第一开口。因此，通风部设于内支承件，可以有效避免润滑脂泄漏。
除了通风部6可以设于内支承件外，通风部可以设于外支承件中。此时，可以在密封腔内设计相应的阻挡结构，来防止润滑脂流入通风部内。
通风部6为形成于轴1中的孔。结合前文所述，在可行实施中，通风部可以为形成于内支承件和外支承件中其中之一的孔。
除此之外，通风部可以为通风管，例如设置通风管穿过内支承件、外支承件和密封件中的其中之一。或者，通风部可以为位于内支承件和外支承件之间的密封间隙。所述密封间隙可以在一定程度上阻挡外界污染物进入密封腔，及阻挡密封腔内的润滑脂泄漏。此时，密封间隙可以位于密封件与内支承件之间，或者位于密封件与外支承件之间。
如图1所示，第一表面11可以分为工作面(为滚动体5所遮挡)和非工作面110，工作面支承滚动体5，第一开口6a可以形成于非工作面110。这里工作面可以作为内滚道，滚动体5沿着工作面滚动，会与工作面直接接触。第一开口6a设于非工作面110，可以避免滚动体5堵塞第一开口6a，而造成通风部6内向外通风不畅，甚至造成通风部6失效。
其中，滚动体5可以包括两列，左边一列滚动体5为滚针，且右边一列滚动体5为滚珠。对应于两列滚动体5，第一表面11可以包括轴向两端的工作面，两个工作面之间的第一表面部分为非工作面110，第一开口6a位于两列滚动体5之间。
根据具体结构及位置，第二表面12可以分为外周面121和轴向端面122，其中外周面121和轴向端面122中的其中之一可以作为轴承安装面，且另一个可以作为非轴承安装面。其中，轴承安装面可以 用来将水泵轴承安装于其他零部件，可能会与其他零部件存在接触或重叠。相比之下，非轴承安装面与其他零部件之间不存在接触或相隔一定距离。
例如，轴1中，外周面121可以作为轴承安装面，水泵轴承可以通过外周面121安装于泵内。此时，第二开口6b可以形成于轴向端面122这一非轴承安装面。这可以避免与水泵轴承连接的零部件或者水泵轴承附近的零部件堵塞第二开口6b，或对第二开口6b附近的气流流动形成阻碍，从而可以确保通风部6内的气流正常流动。
其中，通风部6可以包括：第一段61，沿水泵轴承的轴向，从第二开口6b向密封腔4内延伸；第二段62，与第一段61连接并沿水泵轴承的径向延伸至第一开口6a。此时，可以从第二开口6b开始沿轴向打孔而形成第一段61，及从第一开口6a开始沿径向打孔而形成第二段62，并且第一段61和第二段62交叠而连通，增强方案可行性。
第二实施例
参照图2，在通风部60内可以设有过滤件7，过滤件7可以安置于第一段610内，适于过滤密封腔40外的污染物。尤其是，过滤件7可以防止外界大尺寸污染物从通风部60流入密封腔40内。
另外，第一开口60a可以包括两个或者其他多个，沿内支承件10的周向均匀排布。每个第一开口60a对应于一个第二段620，因此第二段620可以包括两段，沿内支承件10的周向均匀排布，形成径向相对设置。这样，在内支承件10旋转时，可以保持内支承件10在旋转过程中的惯性力沿径向均衡，避免内支承件10因径向惯性力失衡而发生偏转。尤其是，当第一段610和第二段620的交叠位置位于内支承件10的中轴线上，此时两个第二段620的径向长度是相同的，内支承件10在旋转过程中的惯性力可以达到更加均衡。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (10)

  1. 一种水泵轴承，包括：内支承件；
    外支承件，环绕内支承件；
    密封件，位于水泵轴承的轴向两侧，并与所述内支承件和外支承件形成密封腔；
    位于所述密封腔内的若干滚动体，所述外支承件和内支承件通过所述滚动体相对转动；
    其特征在于，所述内支承件中设有通风部以连通所述密封腔和外界。
  2. 如权利要求1所述的水泵轴承，其特征在于，所述通风部为通风管；或者，所述通风部为形成于所述内支承件和外支承件中其中之一的孔；或者，所述通风部为位于所述内支承件和外支承件之间的密封间隙。
  3. 如权利要求1所述的水泵轴承，其特征在于，所述内支承件包括形成所述密封腔边界的内圈；或者，所述内支承件包括形成所述密封腔边界的轴。
  4. 如权利要求1所述的水泵轴承，其特征在于，在所述通风部内设有过滤件，所述过滤件适于过滤密封腔外的污染物。
  5. 如权利要求1所述的水泵轴承，其特征在于，所述内支承件具有位于所述密封腔内的第一表面及位于所述密封腔外的第二表面；
    所述通风部设于所述内支承件中，具有形成于所述第一表面的第一开口和形成于所述第二表面的第二开口。
  6. 如权利要求5所述的水泵轴承，其特征在于，沿水泵轴承的轴向，所述第一表面分为工作面和非工作面，所述工作面支承所述滚动体；
    所述第一开口形成于所述非工作面。
  7. 如权利要求5或6所述的水泵轴承，其特征在于，所述第一开口包括至少两个，沿所述内支承件的周向均匀排布。
  8. 如权利要求5所述的水泵轴承，其特征在于，所述第二表面包括轴承安装面及非轴承安装面，所述第二开口形成于所述非轴承安装面。
  9. 如权利要求8所述的水泵轴承，其特征在于，所述内支承件的轴向端面作为所述非轴承安装面，所述通风部包括：
    第一段，沿水泵轴承的轴向，从所述第二开口向所述密封腔内延伸；
    第二段，与所述第一段连接并沿水泵轴承的径向延伸至所述第一开口。
  10. 如权利要求5所述的水泵轴承，其特征在于，所述滚动体包括两列，所述第一开口位于两列滚动体之间。
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