CN214171328U

CN214171328U - Lip sealing device

Info

Publication number: CN214171328U
Application number: CN202023276086.0U
Authority: CN
Inventors: 陈谢华; 邓铁军
Original assignee: Weichai Torch Technology Co ltd
Current assignee: Weichai Torch Technology Co ltd; Weichai Power Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-10
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a lip sealing device, which comprises a main lip component, an auxiliary lip, a fixed sleeve, a fixed seat and a transmission seat; the outer circular surface of the main lip assembly is in interference fit with the inner hole of the fixing seat, and the main lip assembly is connected with the fixing sleeve to limit the axial displacement of the main lip assembly under medium pressure. Fixed cover is equipped with vice lip including fixed cover terminal surface and the urceolus portion of bending between the fixed cover terminal surface of fixed cover and the fixing base, and the outer section of thick bamboo portion and the fixing base hole interference of fixed cover are connected, and the transmission seat passes from main lip and vice lip intraoral hole. The utility model discloses an interference fit effect between fixed cover and the fixing base can realize reliably restricting the circumference gyration of vice lip to compressing tightly of vice lip. The utility model discloses do not need the professional equipment, can realize the equipment of the sealed product of lip on simple press, can conveniently annotate more lubricating grease simultaneously, prolong lip sealing device's life and improve sealing performance.

Description

Lip sealing device

Technical Field

The utility model relates to a sealing device technical field, more specifically relates to a lip sealing device.

Background

The existing water pump lip sealing device comprises a main lip assembly, an auxiliary lip, a fixed sleeve and a fixed seat, wherein the main lip assembly slides along the circumferential direction of a shaft, and a shell framework piece with a main lip body for supporting is arranged on the main lip assembly. The main lip is vulcanized on the shell framework, then the auxiliary lip and the fixed sleeve are sequentially arranged, the downward protruding end of the shell framework is bent inwards to form a bent part, axial compression force is formed, and the auxiliary lip is tightly pressed through the fixed sleeve. Thus, the main lip assembly, the auxiliary lip and the fixing sleeve form an elastic sealing body assembly which is relatively fixed. Then the whole body is pressed into the fixed seat in an interference manner. The main lip sealing part and the auxiliary lip sealing part are in interference sliding sealing with the pump shaft and rotate relatively at high speed, and the friction torque force generated on the main lip sealing part is limited by the interference force generated by the main lip excircle sealing part and the inner hole of the fixed seat. The main lip excircle sealing portion is rubber, and sealing device long-term operation in-process, rubber can be ageing and produce permanent deformation, and main lip excircle sealing portion can avoid descending with fixing base hole interference force, restricts elasticity seal body subassembly gyration reliability so and can descend. In addition, the bending part of the lip sealing device needs special riveting equipment, and a gap between the main lip elastomer and the auxiliary lip is narrow, so that the lip sealing device is not beneficial to filling of lubricating grease and storing of more lubricating grease.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the spacing unreliable of current lip circumference, lubricating grease pours into inconveniently and the volume is less not enough, provides one kind and makes lip circumference spacing more reliable, and assembly process is simpler, and the filling of lubricating grease is more convenient, can store the lip sealing device of more lubricating grease between main lip and the vice lip.

The purpose of the utility model is realized through the following technical scheme:

a lip sealing device comprises a main lip component, an auxiliary lip, a fixed sleeve, a fixed seat and a transmission seat; the outer disc and the fixing base hole interference fit of main lip subassembly, main lip subassembly are connected with fixed cover, fixed cover is equipped with vice lip including fixed cover terminal surface and the urceolus portion of bending between the fixed cover terminal surface of fixed cover and the fixing base, and the outer section of thick bamboo portion and the fixing base hole interference of fixed cover are connected for provide vice lip packing force, avoid vice lip operation in-process to rotate. The transmission seat penetrates through the inner holes of the main lip and the auxiliary lip, and a grease injection space is formed among the main lip, the fixed sleeve, the auxiliary lip and the transmission seat.

Furthermore, the main lip assembly comprises a main lip and a main lip shell, wherein one end of the main lip shell is fixedly connected with the main lip through vulcanization, and the main lip is used for supporting the main lip, strengthening the elastic deformation strength of the main lip and strengthening the fastening force with an inner hole of the fixing seat. The other end of the main lip shell is connected with the fixed sleeve.

Furthermore, the main lip is an elastic sealing body, an annular groove is formed in the outer circular surface of the main lip, the outer circular surface is cut off and divided into two interference sealing parts, a secondary sealing effect can be achieved, meanwhile, the two interference sealing surfaces can deform towards the inside of the annular groove after being extruded and deformed by interference force, and rubber permanent deformation caused by overlarge stress generated by the outer circle is avoided.

Furthermore, the auxiliary lip is an elastic body, and a groove matched with the fixed sleeve and the fixed seat is formed in the auxiliary lip, so that the auxiliary lip can be prevented from slipping, and the circumferential limit is more reliable. Preferably, the elastomer is polytetrafluoroethylene and composites thereof.

Furthermore, the fixing sleeve is a cylindrical rotating part with a longitudinal section of a U-shaped section or an L-shaped section around the axis, and the bending of the inner cylinder part and the outer cylinder part of the fixing sleeve avoids the sharp edge generated on the end surface from pressing the auxiliary lip or being damaged in the stress deformation process of the auxiliary lip.

Furthermore, the end face of the fixed sleeve is provided with a bulge, and the bulge face is connected with the groove of the auxiliary lip.

Further, the fixing base includes pump hole cooperation portion and inboard rake, and the one end of pump hole cooperation portion is passed through connecting portion and is connected with the one end of inboard rake.

Furthermore, the fixing seat connecting part is provided with a boss which can be embedded into a groove of the auxiliary lip.

Further, the inboard rake and the horizontal direction contained angle of fixing base are 15 ~ 40, the inboard rake angle that the portion set up that inclines in the fixing base can restrict the pump shaft sunken deformation behind the vice lip atress.

Furthermore, the transmission seat comprises a straight cylinder part, and two ends of the straight cylinder part are respectively bent to form flat parts.

Compared with the prior art, the beneficial effects are:

the utility model discloses an interference fit effect between fixed cover and the fixing base can realize reliably restricting the circumference gyration of vice lip to compressing tightly of vice lip. Lip sealing device does not need the professional equipment, can realize the equipment of the sealed product of lip on simple press, can conveniently annotate more lubricating grease simultaneously, extension lip sealing device's life and improvement sealing performance.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a primary lip assembly;

fig. 3 is a schematic view of the structure of the fixing sleeve;

FIG. 4 is a schematic view of a fixing base

FIG. 5 is a schematic view of the transmission seat structure

Fig. 6 is a schematic view of a conventional lip seal.

The oil-gas lubrication pump comprises a main lip 1, an annular groove 101, an outer circular surface 102, a main lip shell 2, an auxiliary lip 3, a fixed sleeve 4, an inner cylinder 401, an outer cylinder 402, a fixed sleeve 403 end surface 404 bulge, a fixed seat 5, a pump hole matching cylinder 501, an inner inclined part 502, a connecting part 503, a boss 504, a transmission seat 6, a straight cylinder 601, a bending part 602 and lubricating grease 7.

Detailed Description

The following examples are further explained and illustrated, but the specific examples are not intended to limit the present invention in any way. Unless otherwise indicated, the methods and equipment used in the examples are conventional in the art and all materials used are conventional commercially available materials.

Example 1

This embodiment provides structural attachment of the lip seal.

As shown in the figure, the lip sealing device comprises a main lip assembly, an auxiliary lip 3, a fixed sleeve 4, a fixed seat 5 and a transmission seat 6. The main lip assembly comprises a main lip 1 and a main lip shell 2, the main lip 1 is a rubber elastic sealing body, an outer circular surface 102 of the main lip is provided with an annular groove 101, and the outer circular surface 102 is cut off and divided into two interference sealing parts which are in interference fit with an inner hole of the fixing seat 5. One end of the main lip shell 2 is bent and fixedly connected with the main lip 1 through vulcanization, and the other end of the main lip shell 2 abuts against the fixed sleeve 4.

An auxiliary lip 3 is arranged between the fixed sleeve 4 and the fixed seat 5, the auxiliary lip 3 is an elastic body, and a groove matched with the fixed sleeve 4 and the fixed seat 5 is formed in the auxiliary lip 3. The main lip assembly, the auxiliary lip 3, the fixing sleeve 4 and the fixing seat 5 form a fixing seat assembly, and a lubricating grease 7 injection space is formed among the main lip 1, the auxiliary lip 3, the fixing sleeve 4 and the fixing seat 5. And after the fixing seat assembly is assembled, the straight cylinder part 601 of the transmission seat 6 is installed, and two ends of the straight cylinder part 601 are bent to form bent parts 602 to prevent the connected fixing seat from sliding out.

The longitudinal section of the fixing sleeve 4 is a U-shaped section and rotates around an axis, and comprises an inner cylinder part 401, a fixing sleeve end surface 403 and an outer cylinder part 402. The inner cylinder part 401 of the fixed sleeve 4 is used for enhancing the strength of the end face 403 of the fixed sleeve, the outer cylinder part 402 is in interference connection with the inner hole of the fixed seat 5, the end face 403 of the fixed sleeve is provided with bulges 404 which are uniformly distributed along the circumference and can be embedded into the groove of the auxiliary lip 3, and the contact end face of the end face 403 of the fixed sleeve and the auxiliary lip 3 is prevented from slipping.

The fixing seat 5 comprises a pump hole matching barrel portion 501 and an inner side inclined portion 502, one end of the pump hole matching portion 501 is connected with one end of the inner side inclined portion 502 through a connecting portion 503, an included angle between the inner side inclined portion 502 and the horizontal direction is 15-40 degrees, a boss 504 is arranged on the connecting portion 503, and the boss can be embedded into a groove of the auxiliary lip 3.

Example 2

The present embodiment provides a process for assembling a lip seal.

Arrange vice lip 3 in 5 hole bottoms of fixing base, the tip of slope up, then put into 5 holes of fixing base with fixed cover 4, adopt frock and pressure to impress fixed cover 4 in 5 holes of fixing base. After the press fitting is completed, the auxiliary lip 3 is tightly attached between the surfaces of the fixed sleeve 4 and the fixed seat 5 under the pressure of the fixed sleeve 4, and meanwhile, the bulge 404 of the fixed sleeve 4 and the boss 504 of the fixed seat 5 are embedded into the groove of the auxiliary lip 3.

After the fixed sleeve 4 is pressed, the outer circular surface 102 of the main lip assembly elastomer is coated with volatile and environment-friendly lubricating liquid (such as clear water) and then is placed into the inner hole of the fixed sleeve 4, the main lip assembly is pressed into the fixed seat 5 by adopting a suitable tool and pressure, and the outer inclined surface of the lip cannot be stressed in the pressing process. Meanwhile, the pressing depth can be limited and controlled by the flange edge of the fixing seat 5 in the pressing process, and the elastomer is prevented from being damaged by the counter pressure of the main lip shell and the fixing sleeve 4 in the pressing process. The fixing seat assembly is composed of the fixing seat 5, the auxiliary lip 3, the fixing sleeve 4 and the main lip assembly, and after the fixing seat assembly is assembled, grease is injected between the main lip 1 and the auxiliary lip 3.

The one end of driving seat 6 is bending portion 602, and the other end is straight section of thick bamboo portion 601, and the fixed seat subassembly is packed into through 1 end of main lip to straight section of thick bamboo portion 601, and after the assembly of driving seat 6 was accomplished, adopt forming die to make the straight section of thick bamboo portion 601 other end of driving seat outwards turn-ups form bending portion 602, avoid assembly back 6 roll-off fixed seat subassemblies, the equipment is accomplished.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lip sealing device is characterized by comprising a main lip assembly, an auxiliary lip, a fixed sleeve, a fixed seat and a transmission seat; the outer circular surface of the main lip component is in interference fit with the inner hole of the fixed seat, the main lip component is connected with the fixed sleeve, the fixed sleeve comprises a fixed sleeve end surface and a bent outer barrel part, an auxiliary lip is arranged between the fixed sleeve end surface and the fixed seat, the outer barrel part of the fixed sleeve is in interference connection with the inner hole of the fixed seat, and the transmission seat penetrates through the inner holes of the main lip and the auxiliary lip; and a grease injection space is formed among the main lip, the fixed sleeve, the auxiliary lip and the transmission seat.

2. The lip seal of claim 1 wherein said main lip assembly includes a main lip and a main lip housing, one end of the main lip housing being fixedly attached to the main lip by vulcanization and the other end of the main lip housing being attached to the retainer sleeve.

3. The lip seal according to claim 1, wherein said main lip is an elastic sealing body, and an annular groove is formed on an outer circumferential surface of the main lip.

4. The lip seal of claim 1 wherein said secondary lip is an elastomeric seal having a groove formed therein for engaging said retention sleeve and said retention seat.

5. The lip seal of claim 1 wherein said sleeve is a cylindrical member having a longitudinal cross-section of "U" or "L" shape which revolves about an axis.

6. The lip seal of claim 1 wherein said pouch end of said pouch is provided with a projection, said projection engaging said secondary lip.

7. The lip seal of claim 1, wherein said anchor block includes a pump bore engaging portion and an inboard beveled portion, one end of the pump bore engaging portion being connected to one end of the inboard beveled portion by a connecting portion.

8. The lip seal of claim 7 wherein said anchor mount attachment portion is provided with a boss.

9. The lip seal of claim 7 wherein the angle between the inner inclined portion of the mounting seat and the horizontal is 15-40 °.

10. The lip seal of claim 1 wherein said actuator seat includes a straight portion, and both ends of said straight portion are respectively bent to form a bent portion.