DE112018001294T5 - Water pump bearings - Google Patents

Abstract

A water pump bearing comprising: an inner support member; an outer support member surrounding the inner support member; a sealing part which is arranged on the two axial sides of the water pump bearing and forms a sealing chamber with the inner support part and the outer support part; a plurality of roller bodies arranged in the sealing chamber, the inner support part and the outer support part being able to rotate relative to one another through the roller bodies; and wherein a ventilation part is arranged in the inner support part to connect the sealing chamber to the outside environment. When the water pump bearing rotates at high speed, the gas in the sealing chamber, which expands due to the high temperature, can be discharged to the outside via the venting part, thus reducing the pressure in the sealing chamber and damaging and aging the components in the vicinity of the Water pump bearing can be prevented. In particular, the formation of a gap between the seal part and the inner support part and between the seal part and the outer support part can be avoided and the grease can be prevented from escaping from the seal chamber and ensuring proper operation of the water pump bearing.

Description

This application claims priority from those filed on March 13, 2017 at the Chinese Patent Office Chinese patent application with the application number 201710146672.7 and the designation "water pump bearing", the complete content of which is incorporated by cross-reference into the present subject.

Technical field

The present invention relates to the technical field of bearings and in particular to a water pump bearing.

General state of the art

A prior art water pump bearing includes: a shaft; an outer ring surrounding the shaft; a sealing part on the two axial sides, which surrounds the shaft and forms a sealing chamber with the shaft and the outer ring, wherein a grease is sealed in the sealing chamber; and a plurality of roller bodies arranged in the sealing chamber. The shaft and the outer ring can rotate against one another by the roller bodies, the lubricating grease performing a lubricating function between the roller bodies and the shaft and between the roller bodies and the outer ring.

The water pump bearing is part of a type of high-speed bearing and when the shaft rotates at high speed, a high temperature arises in the sealing chamber, the gas in the sealing chamber is heated by the high temperature, expands and creates a high pressure in the sealing chamber, whereby the high temperature and high pressure can accelerate damage and aging of nearby components. In particular, the high pressure can impair the tightness between the sealing parts and the shaft and between the sealing parts and the outer ring and lead to the formation of a gap, so that the grease escapes from the sealing chamber via the gap.

Summary of the invention

The object to be achieved by the present invention is the problem that, in the case of water pump bearings of the prior art, when rotating at high speed, a high temperature and a high pressure arise in the sealing chamber which receives the roller bodies.

To achieve the above object, the present invention provides a water pump bearing. The water pump bearing includes: an inner support member; an outer support member surrounding the inner support member; a sealing part which is arranged on the two axial sides of the water pump bearing and forms a sealing chamber with the inner support part and the outer support part; a plurality of roller bodies arranged in the sealing chamber, the inner support part and the outer support part being able to rotate relative to one another through the roller bodies; and a ventilation part arranged in the inner support part to connect the sealing chamber to the outside environment.

• Bei einer Rotation des Wasserpumpenlagers mit hoher Geschwindigkeit kann das Gas in der Dichtungskammer, das sich wegen der hohen Temperatur ausdehnt, über den Entlüftungsteil in die Außenumgebung abgeleitet werden und somit der Druck in der Dichtungskammer verringert und eine Beschädigung und Alterung der in der Nähe des Wasserpumpenlagers gelegenen Bauteile vermieden werden. Insbesondere kann die Bildung eines Spalts zwischen dem Dichtungsteil und dem inneren Stützteil sowie zwischen dem Dichtungsteil und dem äußeren Stützteil vermieden werden, es kann verhindert werden, dass das Schmierfett aus der Dichtungskammer entweicht und ein ordnungsgemäßer Betrieb des Wasserpumpenlagers gewährleistet werden.

In comparison to the prior art, the technical solution of the present invention has the following advantages:

• When the water pump bearing rotates at high speed, the gas in the sealing chamber, which expands due to the high temperature, can be discharged to the outside via the venting part, thus reducing the pressure in the sealing chamber and causing damage and aging to those in the vicinity of the water pump bearing components can be avoided. In particular, the formation of a gap between the seal part and the inner support part and between the seal part and the outer support part can be avoided, the grease can be prevented from escaping from the seal chamber and proper operation of the water pump bearing can be ensured.

Optionally, the ventilation part is a ventilation pipe; or the vent part is a bore formed in either the inner support part or the outer support part; or the ventilation part is a sealing gap which is arranged between the inner support part and the outer support part.

Optionally, the inner support member includes an inner ring that forms the boundary of the sealing chamber; or the inner support member comprises a shaft which forms the boundary of the sealing chamber.

A filter part is optionally arranged in the ventilation part, the filter part being suitable for filtering contaminants from outside the sealing chamber. In this case, the filter part can effectively keep contaminants away from the outside environment, in particular contaminants with larger dimensions, which could penetrate into the sealing chamber via the ventilation part and contaminate the grease.

Optionally, the inner support member has a first surface located in the sealing chamber and one outside the sealing chamber arranged second surface on; and the vent part is disposed in the inner support part and has a first opening formed on the first surface and a second opening formed on the second surface.

In one embodiment, the inner support member can rotate and the outer support member can be attached. When the inner support member rotates at high speed, the grease in the seal chamber is thrown to the outer support member under the action of centrifugal force, so that the grease can be prevented from flowing into the vent member through the first opening and escaping.

In another embodiment, the inner support part and the outer support part can be attached. During operation of the water pump bearing, the grease flows along the inner peripheral surface of the outer support member due to the action of the centrifugal force and cannot flow into the first opening and escape. An arrangement of the ventilation part on the inner support part can thus effectively prevent the grease from escaping.

Optionally, the first surface is divided in the axial direction of the water pump bearing into a work surface and a non-work surface, the work surface supporting the roller bodies; and the first opening is formed on the non-work surface. In this case, during operation of the water pump bearing, the roller bodies can be prevented from blocking the first opening, which is advantageous if the expanding gas flows through the first opening and escapes.

Optionally, the first opening comprises at least two openings which are lined up uniformly in the circumferential direction of the inner support part. In this case, during the rotation, by uniformly lining up the first opening in the circumferential direction, the inertial force of the inner support part in the radial direction can be kept in equilibrium and the inner support part can be prevented from rotating offset due to an imbalance in the radial inertia force.

Optionally, the second surface includes a bearing mounting surface and a non-bearing mounting surface, the second opening being formed on the non-bearing mounting surface. Since the bearing mounting surface is used to mount the water pump bearing on another component, it is inevitable that it will come into contact with, overlap with other components, etc. If, on the other hand, the second opening is formed on the non-mounting surface, this can be avoided the second opening is blocked by other components or that nearby components interfere with the gas flow in the vicinity of the second opening and it can be ensured that the gas flow in the venting part is unimpeded.

Optionally, the axial end surface of the inner support member serves as a non-bearing mounting surface, the vent member comprising: a first portion that extends in the axial direction of the water pump bearing from the first opening into the interior of the seal chamber; and a second section connected to the first section and extending in the radial direction of the water pump bearing up to the second opening.

The roller bodies optionally comprise two rows of roller bodies, the first opening being arranged between the two rows of the roller bodies. A bearing with a double row of roller bodies is presented here as an exemplary embodiment. In another exemplary embodiment, only one row of roller bodies can also be arranged.

list of figures

• 1 shows a sectional view of a water pump bearing in a first embodiment of the present invention, wherein the sectional area runs through the central axis of the water pump bearing.
• 2 shows a sectional view of a water pump bearing in a second embodiment of the present invention, wherein the sectional area runs through the central axis of the water pump bearing.

embodiments

In order to make the objects, features and advantages of the present invention even clearer and easier to understand, a detailed description is given below in conjunction with the accompanying figures for the specific exemplary embodiments of the present invention.

First embodiment

As in 1 shown, the water pump bearing in one embodiment comprises the following: a shaft 1 , an outer ring 2 who the wave 1 surrounded; a sealing part 3 , which is arranged on the two axial sides of the water pump bearing and with the shaft 1 and the outer ring 2 a sealing chamber 4 forms; and several in the seal chamber 4 arranged reel body 5 , the wave 1 and the outer ring 2 through the reel body 5 can rotate against each other. The wave 1 serves as an inner support part for supporting the roller body 5 and puts that from the reel bodies 5 required inner runway ready and the outer ring 2 is as an outer support part for supporting the roller body 5 and puts that from the reel bodies 5 required outer runway ready.

The wave 1 has one inside the seal chamber 4 arranged first surface 11 and one outside the seal chamber 4 arranged second surface 12 on. It is in the wave 1 a venting part 6 arranged to the sealing chamber 4 to connect with the outside environment, the venting part 6 one on the first surface 11 formed first opening 6a and one on the second surface 12 second opening formed 6b having.

If the wave 1 Rotates at high speed is created in the seal chamber 4 a high temperature and the gas in the seal chamber 4 is heated by the high temperature and expands. Now the expanded gas can pass through the first opening 6a in the venting part 6 flow and then through the second opening 6b to be discharged to the outside environment so that the pressure in the seal chamber 4 is reduced and damage and aging of the components in the vicinity of the water pump bearing is prevented. In particular, the formation of a gap between the sealing part 3 and the wave 1 as well as between the sealing part 3 and the outer ring 2 avoided, it can prevent the grease from coming out of the seal chamber 4 escapes and proper operation of the water pump bearing can be guaranteed.

In one embodiment, the inner support member can be a shaft 1 include the boundary of the seal chamber 4 forms. In this case, the reel body 5 direct contact to the shaft 1 , In addition to this solution, the inner support part can comprise an inner ring which forms the boundary of the sealing chamber, or it can also comprise a shaft which is guided through a center bore of the inner ring. In this case, the inner ring provides the inner runway required by the roller bodies and is in direct contact with the roller bodies and the ventilation part can be formed in the inner ring, in which case a second opening can be formed on the end face of the one axial end of the inner ring. In this case, the shaft does not serve as the boundary of the sealing chamber and the inner ring, and the shaft can rotate synchronously.

The outer ring is usually in a water pump bearing 2 attached and the shaft 1 rotates at high speed. If the wave 1 Rotates at high speed, the grease in the seal chamber 4 under the action of centrifugal force to the outer ring 2 flung so that the grease can be prevented from passing through the first opening 6a in the venting part 6 flows and escapes.

In another embodiment of a water pump bearing, even when the inner support member is fixed and the outer support member rotates, the grease flows along the inner peripheral surface of the outer support member due to the action of the centrifugal force and cannot flow into the first opening. An arrangement of the ventilation part on the inner support part can thus effectively prevent the grease from escaping.

In addition to the arrangement of the ventilation part 6 on the inner support part, the venting part can also be arranged on the outer support part. In this case, a corresponding holding structure can be provided in the sealing chamber, which prevents the grease from flowing into the ventilation part.

The venting part 6 is one in the wave 1 drilled hole. In summary, in one possible embodiment, the ventilation part can be a bore made either on the inner support part or on the outer support part.

In addition, the ventilation part can be a ventilation pipe, the ventilation pipe being arranged, for example, in such a way that it is guided either through the inner support part or the outer support part or the sealing part. Or, the ventilation part can be a sealing gap which is arranged between the inner support part and the outer support part. To a certain extent, the sealing gap can prevent the ingress of contaminants from the outside environment into the sealing chamber and the escape of lubricants from the sealing chamber. In this case, the sealing gap can be arranged between the sealing part and the inner support part, or it can be arranged between the sealing part and the outer support part.

As in 1 shown, the first surface 11 into a work surface (from the roll bodies 5 covered) and a non-work surface 110 be divided, with the work surface the roller body 5 supports and the first opening 6a on the non-work surface 110 can be formed. Here, the work surface can serve as an inner runway, with the roller body 5 Roll along the work surface and be in direct contact with the work surface. The first opening 6a is on the non-work surface 110 arranged so that the reel body can be prevented 5 the first opening 6a block and that the vent from the vent part 6 is obstructed to the outside or the venting part 6 even loses its effect.

The roller body can 5 comprise two rows of reel bodies, the left row of the reel bodies 5 from needle rollers and the right row of roller bodies 5 consists of balls. Corresponding to the two rows of reel bodies 5 can be the first surface 11 Work surfaces at the two axial ends, with a part of the first surface between the two work surfaces the non-work surface 110 forms and the first opening 6a between the two rows of reel bodies 5 is arranged.

Depending on the concrete structure and location, the second surface can 12 in an outer peripheral surface 121 and an axial end surface 122 be subdivided into either the outer peripheral surface 121 or the axial end face 122 can serve as a bearing mounting surface and the other can serve as a non-bearing mounting surface. The bearing mounting surface can be used to mount the water pump bearing on another component and it can come into contact with or overlap with other components. In contrast, there is no contact or a certain mutual distance between the non-bearing mounting surface and other components.

For example, in the wave 1 the outer peripheral surface 121 serve as a bearing mounting surface and the water pump bearing can be on the outer peripheral surface 121 be installed in the pump. In this case, the second opening 6b on the non-bearing mounting surface of the axial end surface 122 be educated. This can prevent the components connected to the water pump bearing or the components in the vicinity of the water pump bearing from opening the second opening 6b block or gas flow near the second opening 6b hinder and thus it can be ensured that the gas flow in the venting part is unimpeded.

The venting part 6 Include: a first section 61 that in the axial direction of the water pump bearing from the second opening 6b inside the seal chamber 4 is extended; and a second section 62 that with the first section 61 connected and in the radial direction of the water pump bearing to the first opening 6a is extended. In this case, starting from the second opening 6b , axially drilled a hole and the first section 61 be formed, and starting from the first opening 6a , a hole can be made in the radial direction and the second section 62 are formed, and the first section 61 and the second section 62 can overlap and be connected, which increases the feasibility of the solution.

Second embodiment

As in 2 shown in the venting part 60 a filter part 7 be arranged, the filter part 7 in the first part 610 can be mounted and is suitable to remove contaminants from outside the sealing chamber 40 to filter. In particular, the filter part 7 prevent contaminants with larger dimensions from the outside environment via the ventilation part 60 into the seal chamber 40 penetration.

In addition, the first opening 60a comprise two or more openings in the circumferential direction of the inner support member 10 are evenly lined up. Every first opening 60a corresponds to a second section 620 which is why the second section 620 may comprise two sections, the circumferential direction of the inner support member 10 are evenly lined up and arranged opposite one another in the radial direction. If the inner support part 10 rotates, so during the rotation of the inner support member 10 occurring inertial force in the radial direction are kept in balance and prevented the inner support member 10 staggered due to an imbalance in radial inertia. Especially when the overlay position of the first section 610 and the second section 620 on the central axis of the inner support member 10 is the radial length of the two second sections 620 equal and the inertia of the inner support member 10 balance can be maintained even better during rotation.

Although the present invention has been disclosed as above, it is not so limited. Any person skilled in the art can make all types of changes and corrections without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is the scope defined in the patent claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• CN 201710146672 [0001]

Claims (10)

A water pump bearing comprising: an inner support member; an outer support member surrounding the inner support member; a sealing part which is arranged on the two axial sides of the water pump bearing and forms a sealing chamber with the inner support part and the outer support part; a plurality of roller bodies arranged in the sealing chamber, the inner support part and the outer support part rotating against one another through the roller bodies; characterized in that a ventilation part is arranged in the inner support part in order to connect the sealing chamber to the external environment. Water pump bearings after Claim 1 , characterized in that the ventilation part is a ventilation pipe; or that the ventilation part is a bore which is made either in the inner support part or in the outer support part; or that the venting part is a sealing gap which is arranged between the inner support part and the outer support part. Water pump bearings after Claim 1 , characterized in that the inner support member comprises an inner ring which forms the boundary of the sealing chamber; or that the inner support member comprises a shaft that forms the boundary of the sealing chamber. Water pump bearings after Claim 1 , characterized in that a filter part is arranged in the ventilation part, the filter part being suitable for filtering contaminants from outside the sealing chamber. Water pump bearings after Claim 1 , characterized in that the inner support member has a first surface arranged inside the sealing chamber and a second surface arranged outside the sealing chamber; wherein the venting part is arranged in the inner support part and has a first opening formed on the first surface and a second opening formed on the second surface. Water pump bearings after Claim 5 , characterized in that the first surface in the axial direction of the water pump bearing is divided into a work surface and a non-work surface, the work surface supporting the roller body; and wherein the first opening is formed on the non-work surface. Water pump bearings after Claim 5 or 6 , characterized in that the first opening comprises at least two openings which are lined up uniformly in the circumferential direction of the inner support part. Water pump bearings after Claim 5 , characterized in that the second surface comprises a bearing mounting surface and a non-bearing mounting surface, the second opening being formed on the non-bearing mounting surface. Water pump bearings after Claim 8 , characterized in that the axial end face of the inner support part serves as a non-bearing mounting surface and the vent part comprises: a first portion extending in the axial direction of the water pump bearing from the second opening into the inside of the seal chamber; a second section, which is connected to the first section and extends in the radial direction of the water pump bearing up to the first opening. Water pump bearings after Claim 5 , characterized in that the reel bodies comprise two rows of reel bodies, the first opening being arranged between the two rows of the reel bodies.

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