WO2019148546A1 - Seal combination device for shaft - Google Patents

Seal combination device for shaft Download PDF

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Publication number
WO2019148546A1
WO2019148546A1 PCT/CN2018/076284 CN2018076284W WO2019148546A1 WO 2019148546 A1 WO2019148546 A1 WO 2019148546A1 CN 2018076284 W CN2018076284 W CN 2018076284W WO 2019148546 A1 WO2019148546 A1 WO 2019148546A1
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WO
WIPO (PCT)
Prior art keywords
sealing
rotating shaft
oil
shaft
seal
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PCT/CN2018/076284
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French (fr)
Chinese (zh)
Inventor
王晛
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苏州优德通力科技有限公司
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Publication of WO2019148546A1 publication Critical patent/WO2019148546A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/40Sealings between relatively-moving surfaces by means of fluid

Definitions

  • the utility model relates to a shaft sealing assembly device, relating to the technical field of fluid mechanical sealing.
  • the technical problem to be solved by the utility model is to provide a shaft sealing assembly device which has a simple structure and effectively improves the sealing effect.
  • a shaft sealing assembly device comprising a sealing base, a first sealing member, a second sealing member and a movable plug device, the sealing base being fixed or integral with a component of the application, and between the sealing base and the outer wall of the rotating shaft Forming a sealing cavity, the rotating shaft passes through a sealing cavity in the middle of the sealing base, and the first sealing member and the second sealing member are respectively sleeved on the rotating shaft and placed in the sealing cavity and disposed opposite to each other, the first sealing member and the first sealing member are An oil seal chamber is disposed between the second seals, and a middle of the seal base is provided with an opening perpendicular to an axis of the rotating shaft, and the movable plug device is disposed in the opening, and the gas in the oil seal chamber is reversibly passed through the movable plug device Drain the oil seal chamber.
  • the first sealing member is sleeved on the rotating shaft, the first sealing member comprises a first sealing ring, and the first sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail end of the first sealing ring is vertically oriented
  • the lower bend forms a separating surface of the medium and the lubricating oil, and the lower end of the separating surface of the medium and the lubricating oil is bent toward the front end of the rotating shaft and forms an inclined sealing ring
  • the inclined sealing ring has an inclined angle with the outer wall of the rotating shaft, and the inclined sealing The rear end of the ring abuts against the outer wall of the rotating shaft.
  • the angle of the inclination angle of the inclined seal ring is set to 5°-20°.
  • the second sealing member is sleeved on the rotating shaft, the second sealing member comprises a second sealing ring, the second sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail end of the second sealing ring is perpendicular to The lower bend forms an oil retaining surface, and the lower end of the oil retaining surface is horizontally bent toward the front end of the rotating shaft to form an oil sealing ring, and the sealing oil sealing ring abuts against the outer wall of the rotating shaft.
  • the sealing oil seal ring is provided with a V-shaped groove on one side of the rotating shaft.
  • the angle of the apex angle of the V-groove is set to 5°-30°.
  • the movable plug device comprises a oil plug, a spring, a spring fixing sleeve and a ball
  • the oil plug is provided with a vent hole penetrating through the plug body and fixed on the sealing base, the vent hole and the oil seal cavity Connected
  • the vent hole is set as a stepped hole and the upper part is a large-diameter hole
  • the ball is placed in the large-diameter hole
  • the spring fixing sleeve is fixed to the upper end hole of the large-diameter hole and has a vent hole
  • the spring is disposed It is fitted into the large diameter hole and is coupled with the ball and the spring fixing sleeve.
  • the lower aperture of the large diameter aperture is configured as a tapered aperture that mates with the ball.
  • an isolation sleeve is disposed between the first sealing member and the second sealing member.
  • the rear portion of the second sealing member is provided with a spacer and a hole retaining ring fixed to the sealing base and surrounding the rotating shaft.
  • the utility model has the advantages that the shaft sealing assembly device can effectively reduce the wear of the sealing component, improve the service life, has a wide application range, and has good sealing effect, high reliability, and manufacturing cost. Low, so it has high practicability and economic benefits, suitable for popularization and application.
  • FIG. 1 is a schematic cross-sectional structural view of a front portion of the present invention
  • FIG. 2 is a partial cross-sectional structural view of the movable plug device of the present invention.
  • a shaft sealing assembly device as shown in FIG. 1 and FIG. 2, comprising a sealing base 1, a first sealing member, a second sealing member and a movable plug device, wherein the sealing base is fixed or composed of components of an application.
  • a sealing cavity is formed between the sealing base and the outer wall of the rotating shaft, the rotating shaft passes through a sealing cavity in the middle of the sealing base, and the first sealing member and the second sealing member are respectively sleeved on the rotating shaft and placed in the sealing cavity.
  • the oil seal chamber 3 is disposed between the first seal member and the second seal member, and the oil seal chamber is provided with lubricating oil, thereby effectively lubricating the first seal member and the second seal member to reduce wear. .
  • the middle of the sealing base is provided with an opening perpendicular to the axis of the rotating shaft, and the movable plug device is disposed in the opening, and the gas in the oil sealing chamber is reversibly discharged through the movable plug device, in this embodiment,
  • the movable plug device comprises an oil plug 4, a spring 5, a spring fixing sleeve 6 and a ball 7, and the oil plug is provided with a vent hole penetrating the plug body and fixed on the sealing base.
  • the vent hole is in communication with the oil seal cavity, the vent hole is provided as a stepped hole and the upper part is a large diameter hole 8 , the lower part is a small diameter hole 9 , and the ball is placed in the large diameter hole 8 , further Ground, when the ball is placed at the joint between the large diameter hole and the small diameter hole, the upper hole of the small diameter hole is provided as a tapered hole 10 matched with the ball, so that the ball can be combined with the upper hole of the small diameter hole
  • the sealing is sealed to prevent the outside air from entering the small diameter hole, the diameter of the ball is smaller than the diameter of the large diameter hole, the spring fixing sleeve is fixed to the upper end opening of the large diameter hole and the vent hole 24 is opened, and the spring is placed in the large diameter hole Fitted with ball and spring retaining sleeve Join.
  • the first sealing member is sleeved on the rotating shaft, and the first sealing member comprises a first sealing ring 11 , the first sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail of the first sealing ring
  • the end is bent vertically downward and forms a separating surface 12 of the medium and the lubricating oil, and the lower end of the separating surface of the medium and the lubricating oil is bent toward the front end of the rotating shaft and forms an inclined sealing ring 13 which is opposite to the outer wall of the rotating shaft There is a tilt angle 14 therebetween, and the tail end of the inclined sealing ring abuts against the outer wall of the rotating shaft.
  • the angle of the tilting angle is set to 5°-20°.
  • the first sealing ring The separation surface of the medium and the lubricating oil and the inclined sealing ring are integrally formed and enclosed in a groove-like structure, and a choke chamber 15 for preventing liquid leakage is formed between the three and the rotating shaft, and the liquid passes through the choke chamber.
  • the slanting seal ring generates radial pressure, which in turn makes the slanted seal ring and the rotating shaft more closely fit, thereby effectively improving the sealing effect.
  • the second sealing member is sleeved on the rotating shaft, and the second sealing member includes a second sealing ring 16, the second sealing ring is in sealing contact with the top wall of the sealing chamber, and the second sealing ring is The tail end is bent vertically downward and forms a slinger surface 17, and the lower end of the oil taring surface is horizontally bent toward the front end of the rotating shaft to form an oil sealing ring 18, and the sealing oil sealing ring and the outer wall are abutted against each other.
  • a V-shaped groove 19 is provided on one side of the sealing oil sealing ring and the rotating shaft, and the angle of the apex angle of the V-shaped groove is set to 5°-30°.
  • the oil seal chamber is enclosed between the second seal ring, the oil retaining surface, the seal oil seal ring and the first seal member, and the oil seal chamber is provided with lubricating oil, and then the contact portion of the seal oil seal ring and the rotating shaft is lubricated to reduce
  • the wear of the contact surface and the V-groove structure of the sealing oil seal ring make it have two supporting contact faces with the outer wall of the rotating shaft, and the front supporting contact surface effectively avoids leakage of lubricating oil in the oil sealing cavity, and the rear support
  • the surface is effective to prevent external foreign matter from entering the oil seal chamber, and the sealing effect is good.
  • annular spring 23 sleeved thereon may be disposed on both the first sealing member inclined sealing ring and the sealing member sealing ring of the second sealing member.
  • the pressure of the liquid liquid to be sealed is P1
  • the lower end of the second sealing ring rotates relative to the rotating shaft to generate heat, which in turn causes the lubricating oil in the oil sealing chamber.
  • Generate pressure set the oil pressure to P2, and then set the elastic force of the spring to the ball to P3. Therefore, during actual operation, the product of P1 and the cosine of the first inclination angle is greater than P2, and when P2 is greater than At P3, the pressure in the oil seal chamber is discharged through the vent hole, and the faster the rotation speed of the shaft, the greater the pressure of the P2, so that even if the shaft rotates at a high speed, the sealing effect of the sealing device can be effectively maintained.
  • a spacer sleeve 20 is disposed between the first seal and the second seal.
  • the rear portion of the second sealing member is provided with a gasket 21 and a hole retaining ring 22 which are fixed to the sealing base and surround the rotating shaft.
  • the above shaft sealing assembly device can effectively reduce the wear of the sealing component, improve the service life, has a wide application range, has good sealing effect, high reliability, low production cost, and thus has high practicability and high economic efficiency.

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

Abstract

Provided is a seal combination device for a shaft. An oil seal cavity is provided between a first sealing element and a second sealing element. The middle of a seal base (1) is provided with a hole (8, 9) perpendicular to an axis of a rotating shaft. A movable plug device is disposed in the hole (8, 9). A gas in the oil seal cavity is reversibly exhausted from the oil seal cavity via the movable plug device. The device can effectively reduce the abrasion of sealing components and prolong the service life thereof, and has a good sealing effect.

Description

一种轴用密封组合装置Shaft sealing assembly device 技术领域:Technical field:
本实用新型涉及一种轴用密封组合装置,涉及流体机械密封技术领域。The utility model relates to a shaft sealing assembly device, relating to the technical field of fluid mechanical sealing.
背景技术:Background technique:
目前市场上的机械密封或各种类型的骨架油封,由于是面和面接触,硬碰硬之间的摩擦很容易造成密封面的磨损,使被密封物质泄漏,因而不仅影响密封效果且降低了使用寿命。At present, the mechanical seals on the market or various types of skeleton oil seals, because of the surface and surface contact, the friction between the hard and the hard is easy to cause the wear of the sealing surface, so that the sealed material leaks, thereby not only affecting the sealing effect but also reducing the service life. .
实用新型内容:Utility model content:
本实用新型所要解决的技术问题是:提供一种结构简单且有效提高密封效果的轴用密封组合装置。The technical problem to be solved by the utility model is to provide a shaft sealing assembly device which has a simple structure and effectively improves the sealing effect.
为了解决上述技术问题,本实用新型是通过以下技术方案实现的:In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
一种轴用密封组合装置,包括密封基座、第一密封件、第二密封件以及活动塞装置,所述密封基座固定或与应用场合的部件构成一体,密封基座与转轴外壁之间构成密封腔,所述转轴穿过密封基座中部的密封腔,所述第一密封件、第二密封件均环套在转轴上且置于密封腔内并前后相对设置,第一密封件与第二密封件之间具有油封腔,所述密封基座中部设有与转轴的轴线垂直的开孔,所述活动塞装置置于开孔内,油封腔内的气体可逆止的通过活动塞装置排出油封腔。A shaft sealing assembly device comprising a sealing base, a first sealing member, a second sealing member and a movable plug device, the sealing base being fixed or integral with a component of the application, and between the sealing base and the outer wall of the rotating shaft Forming a sealing cavity, the rotating shaft passes through a sealing cavity in the middle of the sealing base, and the first sealing member and the second sealing member are respectively sleeved on the rotating shaft and placed in the sealing cavity and disposed opposite to each other, the first sealing member and the first sealing member are An oil seal chamber is disposed between the second seals, and a middle of the seal base is provided with an opening perpendicular to an axis of the rotating shaft, and the movable plug device is disposed in the opening, and the gas in the oil seal chamber is reversibly passed through the movable plug device Drain the oil seal chamber.
作为优选,所述第一密封件套接在转轴上,所述第一密封件包括第一密封圈,所述第一密封圈与密封腔顶壁密封接触,第一密封圈的尾端垂直向下折弯形成介质和润滑油的隔离面,介质和润滑油的隔离面下端朝向转轴前端折弯并形成倾斜密封圈,所述倾斜密封圈与转轴的外壁之间具有倾斜角,所述倾斜密封圈的尾端与转轴的外壁贴合抵靠。Preferably, the first sealing member is sleeved on the rotating shaft, the first sealing member comprises a first sealing ring, and the first sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail end of the first sealing ring is vertically oriented The lower bend forms a separating surface of the medium and the lubricating oil, and the lower end of the separating surface of the medium and the lubricating oil is bent toward the front end of the rotating shaft and forms an inclined sealing ring, and the inclined sealing ring has an inclined angle with the outer wall of the rotating shaft, and the inclined sealing The rear end of the ring abuts against the outer wall of the rotating shaft.
作为优选,所述倾斜密封圈的倾斜角的角度设置为5°-20°。Preferably, the angle of the inclination angle of the inclined seal ring is set to 5°-20°.
作为优选,所述第二密封件套接在转轴上,所述第二密封件包括第二密封圈,所述第二密封圈与密封腔顶壁密封接触,第二密封圈的尾端垂直向下折弯形成挡油面,所述挡油面下端朝向转轴前端水平折弯并形成封油密封圈,所述封油密封圈与转轴外壁之间贴合抵靠。Preferably, the second sealing member is sleeved on the rotating shaft, the second sealing member comprises a second sealing ring, the second sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail end of the second sealing ring is perpendicular to The lower bend forms an oil retaining surface, and the lower end of the oil retaining surface is horizontally bent toward the front end of the rotating shaft to form an oil sealing ring, and the sealing oil sealing ring abuts against the outer wall of the rotating shaft.
作为优选,封油密封圈与转轴贴合的一侧面上设有V形槽。Preferably, the sealing oil seal ring is provided with a V-shaped groove on one side of the rotating shaft.
作为优选,所述V型槽的顶角的角度设置为5°-30°。Preferably, the angle of the apex angle of the V-groove is set to 5°-30°.
作为优选,所述活动塞装置包括油塞、弹簧、弹簧固定套以及滚珠,所述油塞上设有贯通塞体的通气孔且固定于密封基座上,所述通气孔与所述油封腔连通,所述通气孔设置为台阶孔且上部为大直径孔,所述滚珠置于大直径孔内,弹簧固定套固定在大直径孔的上端孔口且开有排气孔,所述弹簧置于大直径孔内且与滚珠和弹簧固定套配合联接。Preferably, the movable plug device comprises a oil plug, a spring, a spring fixing sleeve and a ball, and the oil plug is provided with a vent hole penetrating through the plug body and fixed on the sealing base, the vent hole and the oil seal cavity Connected, the vent hole is set as a stepped hole and the upper part is a large-diameter hole, the ball is placed in the large-diameter hole, and the spring fixing sleeve is fixed to the upper end hole of the large-diameter hole and has a vent hole, and the spring is disposed It is fitted into the large diameter hole and is coupled with the ball and the spring fixing sleeve.
作为优选,所述大直径孔的下部孔口设置为与滚珠配合的锥形孔口。Preferably, the lower aperture of the large diameter aperture is configured as a tapered aperture that mates with the ball.
作为优选,所述第一密封件与第二密封件之间设有隔离套。Preferably, an isolation sleeve is disposed between the first sealing member and the second sealing member.
作为优选,所述第二密封件的后部设有固定于密封基座上且环绕在转轴上的垫片和孔用挡圈。Preferably, the rear portion of the second sealing member is provided with a spacer and a hole retaining ring fixed to the sealing base and surrounding the rotating shaft.
与现有技术相比,本实用新型的有益之处是:所述轴用密封组合装置能有效降低密封部件的磨损,提高使用寿命,应用范围广泛,而且密封效果好,可靠性高,制作成本低,因而具有较高的实用性以及经济效益,适合推广应用。Compared with the prior art, the utility model has the advantages that the shaft sealing assembly device can effectively reduce the wear of the sealing component, improve the service life, has a wide application range, and has good sealing effect, high reliability, and manufacturing cost. Low, so it has high practicability and economic benefits, suitable for popularization and application.
附图说明:BRIEF DESCRIPTION OF THE DRAWINGS:
下面结合附图对本实用新型进一步说明:The utility model is further described below with reference to the accompanying drawings:
图1是本实用新型的正面部分剖视结构示意图;1 is a schematic cross-sectional structural view of a front portion of the present invention;
图2是本实用新型的活动塞装置的部分剖视结构示意图。2 is a partial cross-sectional structural view of the movable plug device of the present invention.
具体实施方式:Detailed ways:
下面将对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本实用新型的一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本实用新型保护的范围:The technical solutions in the embodiments of the present invention are clearly and completely described below. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the protection of the present invention:
如图1、图2所示的一种轴用密封组合装置,包括密封基座1、第一密封件、第二密封件以及活动塞装置,所述密封基座固定或与应用场合的部件构成一体,密封基座与转轴外壁之间构成密封腔,所述转轴穿过密封基座中部的密封腔,所述第一密封件、第二密封件均环套在转轴上且置于密封腔内并前后相对设置,第一密封件与第二密封件之间具有油封腔3,所述油封腔内设有润滑油,继而对第一密封件、第二密封件起到有效润滑作用,减少磨损。A shaft sealing assembly device as shown in FIG. 1 and FIG. 2, comprising a sealing base 1, a first sealing member, a second sealing member and a movable plug device, wherein the sealing base is fixed or composed of components of an application. In one piece, a sealing cavity is formed between the sealing base and the outer wall of the rotating shaft, the rotating shaft passes through a sealing cavity in the middle of the sealing base, and the first sealing member and the second sealing member are respectively sleeved on the rotating shaft and placed in the sealing cavity. The oil seal chamber 3 is disposed between the first seal member and the second seal member, and the oil seal chamber is provided with lubricating oil, thereby effectively lubricating the first seal member and the second seal member to reduce wear. .
所述密封基座中部设有与转轴的轴线垂直的开孔,所述活动塞装置置于开孔内,油封腔内的气体可逆止的通过活动塞装置排出油封腔,在本实施例中,为提高排气过程的稳定性,所述活动塞装置包括油塞4、弹簧5、弹簧固定套6以及滚珠7,所述油塞上设有贯通塞体的通气孔且固定于密封基座上(增),所述通气孔与所述油封腔连通,所述通气孔设置为台阶孔且上部为大直径孔8,下部为小直径孔9,所述滚珠置于大直径孔8内,进一步地,当滚珠置于大直径孔和小直径孔之间连接处时,小直径孔的上部孔口处设置为与滚珠配合的锥形孔口10,因而滚珠能与小直径孔的上部孔口契合密封,阻止外部气体进入小直径孔内,滚珠的直径小于大直径孔的孔径,弹簧固定套固定在大直径孔的上端孔口且开有排气孔24,所述弹簧置于大直径孔内且与滚珠和弹簧固定套配合联接。滚珠在不受外力的情况下,滚珠会在弹簧以及重力的作用下压合在锥形孔口上,当气体自小直径孔下部进入且推动滚珠离开锥形孔口并向上运动,继而气体进 入大直径孔内并通过弹簧固定套的排气孔排出,继而平衡油封腔内的压力。The middle of the sealing base is provided with an opening perpendicular to the axis of the rotating shaft, and the movable plug device is disposed in the opening, and the gas in the oil sealing chamber is reversibly discharged through the movable plug device, in this embodiment, In order to improve the stability of the exhaust process, the movable plug device comprises an oil plug 4, a spring 5, a spring fixing sleeve 6 and a ball 7, and the oil plug is provided with a vent hole penetrating the plug body and fixed on the sealing base. (增增), the vent hole is in communication with the oil seal cavity, the vent hole is provided as a stepped hole and the upper part is a large diameter hole 8 , the lower part is a small diameter hole 9 , and the ball is placed in the large diameter hole 8 , further Ground, when the ball is placed at the joint between the large diameter hole and the small diameter hole, the upper hole of the small diameter hole is provided as a tapered hole 10 matched with the ball, so that the ball can be combined with the upper hole of the small diameter hole The sealing is sealed to prevent the outside air from entering the small diameter hole, the diameter of the ball is smaller than the diameter of the large diameter hole, the spring fixing sleeve is fixed to the upper end opening of the large diameter hole and the vent hole 24 is opened, and the spring is placed in the large diameter hole Fitted with ball and spring retaining sleeve Join. When the ball is not subjected to external force, the ball will be pressed against the conical orifice under the action of spring and gravity. When the gas enters from the lower part of the small diameter hole and pushes the ball away from the conical orifice and moves upward, then the gas enters the big The inside of the diameter hole is discharged through the vent hole of the spring fixing sleeve, and then the pressure in the oil sealing chamber is balanced.
为提高密封效果,所述第一密封件套接在转轴上,所述第一密封件包括第一密封圈11,所述第一密封圈与密封腔顶壁密封接触,第一密封圈的尾端垂直向下折弯并形成介质和润滑油的隔离面12,所述介质和润滑油的隔离面的下端朝向转轴前端折弯并形成倾斜密封圈13,所述倾斜密封圈与转轴的外壁之间具有倾斜角14,所述倾斜密封圈的尾端与转轴的外壁贴合抵靠,作为优选实施方案,所述倾斜角的角度设置为5°-20°,实际应用中,第一密封圈、介质和润滑油的隔离面、倾斜密封圈一体成型且围合呈凹槽状结构,三者与转轴之间形成阻止液体外泄的阻流腔15,液体在通过阻流腔时,会对倾斜密封圈产生径向压力,继而使得倾斜密封圈与转轴之间贴合更加紧密,有效提高密封效果。In order to improve the sealing effect, the first sealing member is sleeved on the rotating shaft, and the first sealing member comprises a first sealing ring 11 , the first sealing ring is in sealing contact with the top wall of the sealing chamber, and the tail of the first sealing ring The end is bent vertically downward and forms a separating surface 12 of the medium and the lubricating oil, and the lower end of the separating surface of the medium and the lubricating oil is bent toward the front end of the rotating shaft and forms an inclined sealing ring 13 which is opposite to the outer wall of the rotating shaft There is a tilt angle 14 therebetween, and the tail end of the inclined sealing ring abuts against the outer wall of the rotating shaft. As a preferred embodiment, the angle of the tilting angle is set to 5°-20°. In practical applications, the first sealing ring The separation surface of the medium and the lubricating oil and the inclined sealing ring are integrally formed and enclosed in a groove-like structure, and a choke chamber 15 for preventing liquid leakage is formed between the three and the rotating shaft, and the liquid passes through the choke chamber. The slanting seal ring generates radial pressure, which in turn makes the slanted seal ring and the rotating shaft more closely fit, thereby effectively improving the sealing effect.
在本实施例中,所述第二密封件套接在转轴上,所述第二密封件包括第二密封圈16,所述第二密封圈与密封腔顶壁密封接触,第二密封圈的尾端垂直向下折弯并形成挡油面17,所述挡油面的下端朝向转轴前端水平折弯并形成封油密封圈18,所述封油密封圈与外壁之间贴合抵靠,进一步地,所述封油密封圈与转轴贴合的一侧面上设有V形槽19,且所述V型槽的顶角的角度设置为5°-30°。In this embodiment, the second sealing member is sleeved on the rotating shaft, and the second sealing member includes a second sealing ring 16, the second sealing ring is in sealing contact with the top wall of the sealing chamber, and the second sealing ring is The tail end is bent vertically downward and forms a slinger surface 17, and the lower end of the oil taring surface is horizontally bent toward the front end of the rotating shaft to form an oil sealing ring 18, and the sealing oil sealing ring and the outer wall are abutted against each other. Further, a V-shaped groove 19 is provided on one side of the sealing oil sealing ring and the rotating shaft, and the angle of the apex angle of the V-shaped groove is set to 5°-30°.
所述第二密封圈、挡油面、封油密封圈与第一密封件之间围合成油封腔,油封腔内设有润滑油,继而对封油密封圈与转轴的接触处进行润滑,减少接触面的磨损,封油密封圈的V型槽结构设计,使得其与转轴的外壁之间具有两个支撑接触面,其前部支撑接触面有效避免油封腔内的润滑油泄露,后部支撑面有效避免外部异物进入油封腔,密封效果好。The oil seal chamber is enclosed between the second seal ring, the oil retaining surface, the seal oil seal ring and the first seal member, and the oil seal chamber is provided with lubricating oil, and then the contact portion of the seal oil seal ring and the rotating shaft is lubricated to reduce The wear of the contact surface and the V-groove structure of the sealing oil seal ring make it have two supporting contact faces with the outer wall of the rotating shaft, and the front supporting contact surface effectively avoids leakage of lubricating oil in the oil sealing cavity, and the rear support The surface is effective to prevent external foreign matter from entering the oil seal chamber, and the sealing effect is good.
进一步地,为提高密封效果,还可以在第一密封件倾斜密封圈上和第二密封件的封油密封圈上均设有环套在其上的环形弹簧23。Further, in order to improve the sealing effect, an annular spring 23 sleeved thereon may be disposed on both the first sealing member inclined sealing ring and the sealing member sealing ring of the second sealing member.
因而,在实际应用中,将被密封的流动液体的压力为P1,而由于转轴转动时,第二密封圈的下端与转轴之间相对转动时会摩擦生热,继而使得油封腔内的润滑油产生压力,将此油压设置为P2,然后将弹簧对滚珠的弹性作用力设置为P3,因此,在实际运行过程中,P1与第一倾斜角的余弦值的乘积大于P2,而当P2大于P3时,油封腔内的压力会通过通气孔排出,而转轴转速越快,P2压力会越大,因而即使转轴高速旋转,也能有效保持密封装置的密封效果。Therefore, in practical applications, the pressure of the liquid liquid to be sealed is P1, and when the rotating shaft rotates, the lower end of the second sealing ring rotates relative to the rotating shaft to generate heat, which in turn causes the lubricating oil in the oil sealing chamber. Generate pressure, set the oil pressure to P2, and then set the elastic force of the spring to the ball to P3. Therefore, during actual operation, the product of P1 and the cosine of the first inclination angle is greater than P2, and when P2 is greater than At P3, the pressure in the oil seal chamber is discharged through the vent hole, and the faster the rotation speed of the shaft, the greater the pressure of the P2, so that even if the shaft rotates at a high speed, the sealing effect of the sealing device can be effectively maintained.
为方便安装,第一密封件与第二密封件之间设有隔离套20。For ease of installation, a spacer sleeve 20 is disposed between the first seal and the second seal.
另外,为进一步提高密封效果以及整体结构的稳固性,所述第二密封件的后部设有固定于密封基座上且环绕在转轴上的垫片21和孔用挡圈22。In addition, in order to further improve the sealing effect and the stability of the overall structure, the rear portion of the second sealing member is provided with a gasket 21 and a hole retaining ring 22 which are fixed to the sealing base and surround the rotating shaft.
上述轴用密封组合装置能有效降低密封部件的磨损,提高使用寿命,应用范围广泛,而且密封效果好,可靠性高,制作成本低,因而具有较高的实用性以及经济效益高。The above shaft sealing assembly device can effectively reduce the wear of the sealing component, improve the service life, has a wide application range, has good sealing effect, high reliability, low production cost, and thus has high practicability and high economic efficiency.
需要强调的是:以上仅是本实用新型的较佳实施例而已,并非对本实用新型作任何形式上的限制,凡是依据本实用新型的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本实用新型技术方案的范围内。It should be emphasized that the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form. Any simple modification or equivalent change to the above embodiment in accordance with the technical essence of the present invention is Modifications are still within the scope of the technical solutions of the present invention.

Claims (10)

  1. 一种轴用密封组合装置,其特征在于:包括密封基座、第一密封件、第二密封件以及活动塞装置,所述密封基座固定或与应用场合的部件构成一体,密封基座与转轴外壁之间构成密封腔,所述转轴穿过密封基座中部的密封腔,所述第一密封件、第二密封件均环套在转轴上且置于密封腔内并前后相对设置,第一密封件与第二密封件之间具有油封腔,所述密封基座中部设有与转轴的轴线垂直的开孔,所述活动塞装置置于开孔内,油封腔内的气体可逆止的通过活动塞装置排出油封腔。A shaft sealing assembly characterized by comprising a sealing base, a first sealing member, a second sealing member and a movable plug device, the sealing base being fixed or integral with the components of the application, the sealing base and the sealing base A sealing cavity is formed between the outer walls of the rotating shaft, and the rotating shaft passes through the sealing cavity in the middle of the sealing base, and the first sealing member and the second sealing member are respectively sleeved on the rotating shaft and placed in the sealing cavity and disposed opposite to each other. An oil seal chamber is disposed between a sealing member and the second sealing member, and an opening of the sealing base is perpendicular to an axis of the rotating shaft, and the movable plug device is disposed in the opening, and the gas in the oil sealing chamber is reversible The oil seal chamber is discharged through the movable plug device.
  2. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述第一密封件套接在转轴上,所述第一密封件包括第一密封圈,所述第一密封圈与密封腔顶壁密封接触,第一密封圈的尾端垂直向下折弯形成介质和润滑油的隔离面,所述介质和润滑油的隔离面的下端朝向转轴前端折弯并形成倾斜密封圈,所述倾斜密封圈与转轴的外壁之间具有倾斜角,所述倾斜密封圈的尾端与转轴的外壁贴合抵靠。The shaft sealing assembly device according to claim 1, wherein the first sealing member is sleeved on the rotating shaft, the first sealing member comprises a first sealing ring, and the first sealing ring is The top wall of the sealing chamber is in sealing contact, the tail end of the first sealing ring is bent vertically downward to form a separating surface of the medium and the lubricating oil, and the lower end of the separating surface of the medium and the lubricating oil is bent toward the front end of the rotating shaft and forms an inclined sealing ring. The inclined sealing ring has an inclination angle with the outer wall of the rotating shaft, and the tail end of the inclined sealing ring abuts against the outer wall of the rotating shaft.
  3. 根据权利要求2所述的一种轴用密封组合装置,其特征在于:所述倾斜密封圈的倾斜角的角度设置为5°-20°。A shaft seal assembly according to claim 2, wherein the angle of inclination of the inclined seal ring is set to 5-20.
  4. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述第二密封件套接在转轴上,所述第二密封件包括第二密封圈,所述第二密封圈与密封腔顶壁密封接触,第二密封圈的尾端垂直向下折弯形成挡油面,所述挡油面下端朝向转轴前端水平折弯并形成封油密封圈,所述封油密封圈与外壁之间贴合抵靠。The shaft sealing assembly device according to claim 1, wherein the second sealing member is sleeved on the rotating shaft, and the second sealing member comprises a second sealing ring, the second sealing ring and The top wall of the sealing chamber is in sealing contact, and the tail end of the second sealing ring is bent vertically downward to form an oil retaining surface, and the lower end of the oil retaining surface is horizontally bent toward the front end of the rotating shaft to form an oil sealing ring, and the sealing oil sealing ring is The outer walls are fitted against each other.
  5. 根据权利要求4所述的一种轴用密封组合装置,其特征在于:所述封油密封圈与转轴贴合的一侧面上设有V形槽。A shaft seal assembly according to claim 4, wherein a side surface of the seal seal ring that is fitted to the rotating shaft is provided with a V-shaped groove.
  6. 根据权利要求5所述的一种轴用密封组合装置,其特征在于:所述V型槽的 顶角的角度设置为5°-30°。A shaft seal assembly according to claim 5, wherein the angle of the apex angle of said V-shaped groove is set to 5 to 30.
  7. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述活动塞装置包括油塞、弹簧、弹簧固定套以及滚珠,所述油塞上设有贯通塞体的通气孔且固定于密封基座上,所述通气孔与所述油封腔连通,所述通气孔设置为台阶孔且上部为大直径孔,所述滚珠置于大直径孔内,弹簧固定套固定在大直径孔的上端孔口且开有排气孔,所述弹簧置于大直径孔内且与滚珠和弹簧固定套配合联接。The shaft seal assembly device according to claim 1, wherein the movable plug device comprises an oil plug, a spring, a spring fixing sleeve and a ball, and the oil plug is provided with a vent hole penetrating the plug body and Fixing on the sealing base, the vent hole is in communication with the oil seal cavity, the vent hole is arranged as a stepped hole and the upper part is a large diameter hole, the ball is placed in the large diameter hole, and the spring fixing sleeve is fixed at the large diameter The upper end opening of the hole is open with a venting hole, and the spring is placed in the large diameter hole and is coupled with the ball and the spring fixing sleeve.
  8. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述大直径孔的下部孔口设置为与滚珠配合的锥形孔口。A shaft seal assembly according to claim 1, wherein the lower opening of the large diameter hole is provided as a tapered opening that cooperates with the ball.
  9. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述第一密封件与第二密封件之间设有隔离套。The shaft sealing assembly device according to claim 1, wherein an isolation sleeve is disposed between the first sealing member and the second sealing member.
  10. 根据权利要求1所述的一种轴用密封组合装置,其特征在于:所述第二密封件的后部设有固定于密封基座上且环绕在转轴上的垫片和孔用挡圈。A shaft seal assembly according to claim 1, wherein the rear portion of the second seal member is provided with a gasket and a hole retaining ring fixed to the seal base and surrounding the rotating shaft.
PCT/CN2018/076284 2018-01-31 2018-02-11 Seal combination device for shaft WO2019148546A1 (en)

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CN201820166982.5U CN208237076U (en) 2018-01-31 2018-01-31 A kind of axis sealing combination device

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CN112192295B (en) * 2020-09-27 2022-07-12 泉州市井贺精密设备有限公司 Tool turret long in service life

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CN204512378U (en) * 2014-12-26 2015-07-29 南京高速齿轮制造有限公司 Seal arrangement between central shaft and gear box end cover
CN104806736A (en) * 2015-04-21 2015-07-29 苏州船用动力系统股份有限公司 Propeller shaft sealing structure of ship propeller

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JP2010144875A (en) * 2008-12-19 2010-07-01 Tanken Seal Seiko Co Ltd Seal device for bearing
CN204299877U (en) * 2014-11-13 2015-04-29 上海本菱涡旋压缩机有限公司 A kind of axial seal structure for screw compressor
CN204512378U (en) * 2014-12-26 2015-07-29 南京高速齿轮制造有限公司 Seal arrangement between central shaft and gear box end cover
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112648019A (en) * 2021-02-02 2021-04-13 昆明理工大学 Flexible sealing device
CN112648019B (en) * 2021-02-02 2024-06-07 昆明理工大学 Flexible sealing device

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