CN208919325U - A kind of double combined seals - Google Patents

Abstract

A kind of double combined seals, it is related to oil seal technique field, including rubber body, it is " L " type support frame that the inside of the rubber body outer circle, which is equipped with shaft section, the inner circle of the rubber body is from top to bottom equipped with the first main lip and the second main lip, the second main lip includes that shaft section is " L " type PTFE patch, the end of the lower section transverse direction of the end and support frame of the lower end transverse direction of the PTFE patch is clamped, rubber paster layer is covered on the two sidewalls of the vertical annulus in PTFE patch upper end, the rubber paster layer links into an integrated entity with the rubber body.The utility model service life with higher, while application range can be improved and reduce later maintenance cost.

Description

A kind of double combined seals

Technical field

The utility model relates to oil seal technique fields, and in particular to a kind of double combined seals.

Background technique

Oil sealing is exactly the mechanical organ for oil sealing as its name suggests.From the sealing function of oil sealing, feature, structure type, work Make state and sealing mechanism etc. and be segmented into diversified forms, at present automobile industry it is most commonly used there are two types of: it is close that one is rubber Lip oil sealing is sealed, as shown in Figure 1；One is PTFE seal lip oil sealings, as shown in Figure 2.Rubber seal lip oil sealing generally has three parts Composition: rubber bodies, support frame and fastening spring；Its main lip is pressed and molded by rubber, and followability is good.PTFE seal lip oil Package includes skeleton, rubber bodies and sheet of PTFE, its main feature is that: the sheet of PTFE post-axis face processes screw type return wire, is conducive to Increase pumping effect.

But the followability of rubber seal lip oil sealing is good, high temperature resistant, wearability are poor, cause rubber seal lip oily The service life of envelope is shorter, often because causing to scrap situations such as high temperature sintering, serious wear at main lip, needs the frequent later period Maintenance and replacement, higher cost；PTFE seal lip oil sealing is bonded due at sealing lip being sheet of PTFE with axis, lacks high resiliency Performance, followability is poor, therefore is generally only used at the sealing structure of single direction rotation, and application range has certain office It is sex-limited.

Summary of the invention

In order to solve above-mentioned problem of the prior art, the utility model provides a kind of double combined seals, with higher to make With the service life, while application range can be improved and reduce later maintenance cost.

The purpose of this utility model can be realized by the following technical scheme: a kind of double combined seals, including rubber body, It is " L " type support frame that the inside of the rubber body outer circle, which is equipped with shaft section, and the inner circle of the rubber body is from top to bottom Equipped with the first main lip and the second main lip, the second main lip includes that shaft section is " L " type PTFE patch, the PTFE patch The end of the lower section transverse direction of the end and support frame of the lower end transverse direction of piece is clamped, the vertical annulus in PTFE patch upper end Two sidewalls on be covered with rubber paster layer, the rubber paster layer links into an integrated entity with the rubber body.

Preferably, the inner hole surface of the PTFE patch is equipped with several annular grooves parallel to each other, the rubber paster layer On the annular groove of the fixed inner hole surface for being covered in the PTFE patch.Groove has the ability of trapped fuel, can guarantee the second main lip Oil film at mouthful is uniform, improves its wearability.

Preferably, the end of the support frame lower end is equipped with seam allowance, the end card of the lower end transverse direction of the PTFE patch On the seam allowance.

Preferably, the inner sidewall of the described first main lip is equipped with bidirectional return line.The oil storage capacity for increasing main lip, mentions Its high wearability.

Preferably, the fixed interlocking of the lateral surface of the described first main lip has fastening spring.It is main that fastening spring can increase first The circumferential enclasping force of lip increases the sealing performance of the first main lip.

Preferably, the lower end of the described second main lip is equipped with dustproof lip.Dustproof lip can prevent extraneous dust from entering oil sealing, keep away Exempt from the main lip of oil sealing because caused by dust accretions oil sealing cross thermal sintering, guarantee the service life of oil sealing.

The use principle of the utility model: after double combined seals are installed, the first main lip and the second main lip interference Be sealed on axis: 1. initial stages: the first main lip is main seal, and the second main lip is secondary sealing mouth, with double compound oils The use of envelope, the first main lip are rubber material, and for a long time using rear fatigue at high temperature, abrasion aggravation, sealing performance is gradually deteriorated, The rubber paster layer at the second main lip is also because long-time is using abrasion at this time, but the second main lip is using PTFE patch as bone Frame, characteristic resistant to high temperature get well the sealing performance of rubber paster layer compared with the first main lip, and double combined seals make at this time With enter second stage；2. second stage: the second main lip is main seal, and the first main lip is secondary sealing mouth, rubber paster Layer is covered on the inner hole of PTFE patch along the profile of annular groove, and the annular groove of PTFE patch has centainly when in use Oil storage capacity, increase the second main lip greasy property, while rubber paster layer can increase PTFE patch elasticity and with Kinetic force, after rubber paster layer is worn in use, and the inner wall of ring-shaped P TFE patch is caused to leak out, double combined seals Using enter the phase III；3. the phase III: the inner wall post-axis of PTFE patch is tightly connected, the profit stored in annular groove at this time Lubricating oil generates extruding, therefore annular groove inward flange position to the rubber paster layer pasted in annular groove under the action of extruding force The rubber paster layer set can equally play the role of sealing.

Resultant effect brought by the utility model includes: that the utility model simple structure is reasonable, easy to use, and first is main Lip is used cooperatively with the second main lip, and the first main lip is rubber seal lip, and the second main lip is same as skeleton using PTFE patch When paste rubber paster layer, in double combined seal use processes, different phase primary seal mouth is converted mutually with secondary sealing mouth, will The high resiliency of rubber seal lip, trackability extend making for double combined seals in conjunction with the wearability of PTFE seal lip, thermal stability With the service life, while keeping its application range broader, reduces later period repair and maintenance cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model background technique.

Fig. 2 is the structural schematic diagram of the utility model background technique.

Fig. 3 is the structural schematic diagram of the double combined seals of the utility model embodiment.

Wherein, the identical appended drawing reference of identical component in the accompanying drawings；The attached drawing is not drawn according to the actual ratio.

Specific embodiment

The utility model is further illustrated with reference to the accompanying drawings and examples.

Embodiment

A kind of double combined seals, including rubber body 1, it is " L " type that the inside of 1 outer circle of rubber body, which is equipped with shaft section, Support frame 2, the inner circle of the rubber body 1 are from top to bottom equipped with the first main lip 3 and the second main lip 4, and described second Main lip 4 includes that shaft section is " L " type PTFE patch 41, the end of the lower end transverse direction of the PTFE patch 41 and the support rib The end of the lower section transverse direction of frame 2 is clamped, and is covered with rubber paster layer on the two sidewalls of the vertical annulus in 41 upper end of PTFE patch 42, the rubber paster layer 42 links into an integrated entity with the rubber body 1.The inner hole surface of the PTFE patch 41 is equipped with several mutual Parallel annular groove 411, preferably 3, the fixed inner hole for being covered in the PTFE patch 41 of the rubber paster layer 42 On the annular groove 411 in face.Groove has the ability of trapped fuel, can guarantee that the oil film at the second main lip 4 is uniform, it is wear-resisting to improve its Property.The end of 2 lower end of support frame is equipped with seam allowance 21, and the end of the lower end transverse direction of the PTFE patch 41 is stuck in described stop On mouth 21.

The inner sidewall of the first main lip 3 is equipped with bidirectional return line 31.The oil storage capacity for increasing main lip, improves it Wearability.The fixed interlocking of the lateral surface of the first main lip 3 has fastening spring 5.Fastening spring 5 can increase the first main lip 3 Circumferential enclasping force, increase the first main lip 3 sealing performance.The lower end of the second main lip 4 is equipped with dustproof lip 6.It is dust-proof Lip 6 can prevent extraneous dust from entering oil sealing, avoid the main lip of oil sealing because caused by dust accretions oil sealing cross thermal sintering, guarantee oil sealing Service life.

The use principle of the utility model embodiment: after double combined seals are installed, the first main lip 3 and the second main lip 4 interference seals of mouth are on axis: 1. initial stages: the first main lip 3 is main seal, and the second main lip 4 is secondary sealing mouth, with The use of double combined seals, the first main lip 3 are rubber material, for a long time using rear fatigue at high temperature, abrasion aggravation, sealing performance Gradually be deteriorated, at this time the rubber paster layer 42 at the second main lip 4 also because long-time using abrasion, but the second main lip 4 with PTFE patch 41 is skeleton, and characteristic resistant to high temperature get well the sealing performance of rubber paster layer 42 compared with the first main lip 3, this When double combined seal use enter second stage；2. second stage: the second main lip 4 is main seal, and the first main lip 3 is Secondary sealing mouth, rubber paster layer 42 are covered on the inner hole of PTFE patch 41 along the profile of annular groove 411, PTFE patch 41 Annular groove 411 when in use have certain oil storage capacity, increase the second main lip 4 greasy property, while rubber paste Lamella 42 can increase the elasticity of PTFE patch 41 and with kinetic force, lead to ring when rubber paster layer 42 is worn in use After the inner wall of shape PTFE patch 41 leaks out, the use of double combined seals enters the phase III；3. the phase III: PTFE patch 41 Inner wall post-axis is tightly connected, and the lubricating oil stored in annular groove 411 at this time is under the action of extruding force in annular groove 411 The rubber paster layer 42 pasted generates extruding, therefore the rubber paster layer 42 of 411 inward flange position of annular groove can equally play The effect of sealing.

Resultant effect brought by the utility model embodiment includes: that the utility model embodiment simple structure is reasonable, is made With convenient, the first main lip 3 is used cooperatively with the second main lip 4, and the first main lip 3 is rubber seal lip, the second main lip 4 with PTFE patch 41 is that skeleton pastes rubber paster layer 42 simultaneously, in double combined seal use processes, different phase primary seal mouth It is converted mutually with secondary sealing mouth, by the high resiliency of rubber seal lip, the wearability of trackability and PTFE seal lip, thermal stability knot It closes, extends the service life of double combined seals, while keeping its application range broader, reduce later period repair and maintenance cost.

This specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification revealed interior Hold, so that those skilled in the art understands and reads, is not intended to limit the utility model enforceable qualifications, therefore not Has technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are practical new not influencing this Under the effect of type can be generated and the purpose that can reach, it should all still fall in the revealed technology contents of the utility model and obtain and can contain In the range of lid.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, It is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness or tune It is whole, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.

The utility model is described above with reference to preferred embodiment, but the protection scope of the utility model is not Limited to this, any all technical solutions fallen within the scope of the appended claims are within the protection scope of the present utility model.? In the case where not departing from the scope of the utility model, various improvement can be carried out to it and can be replaced with equivalent therein Component.Especially, as long as structural conflict is not present, items technical characteristic mentioned in the various embodiments can be in any way It combines.

Claims (6)

1. a kind of double combined seals, which is characterized in that including rubber body, the inside of the rubber body outer circle is equipped with shaft section For " L " type support frame, the inner circle of the rubber body is from top to bottom equipped with the first main lip and the second main lip, and described Two main lips include that shaft section is " L " type PTFE patch, the end of the lower end transverse direction of the PTFE patch and the support frame Lower section transverse direction end clamping, be covered with rubber paster layer on the two sidewalls of the vertical annulus in PTFE patch upper end, it is described Rubber paster layer links into an integrated entity with the rubber body.

2. double combined seals according to claim 1, which is characterized in that the inner hole surface of the PTFE patch is equipped with several mutual Parallel annular groove, the rubber paster layer are fixed on the annular groove for the inner hole surface for being covered in the PTFE patch.

3. double combined seals according to claim 2, which is characterized in that the end of the support frame lower end is equipped with only Mouthful, the end of the lower end transverse direction of the PTFE patch is stuck on the seam allowance.

4. double combined seals according to claim 3, which is characterized in that the inner sidewall of the first main lip is equipped with double To return wire.

5. double combined seals according to claim 4, which is characterized in that the fixed interlocking of the lateral surface of the first main lip There is fastening spring.

6. double combined seals according to claim 5, which is characterized in that the lower end of the second main lip is equipped with dust-proof Lip.