CN101865289A

CN101865289A - Sealing ring with isobathic rectangular groove on end surface

Info

Publication number: CN101865289A
Application number: CN 201010207034
Authority: CN
Inventors: 苑士华; 胡纪滨; 魏超; 刘丁华; 荆崇波; 李雪原; 尹旭峰; 彭增雄
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2010-06-23
Filing date: 2010-06-23
Publication date: 2010-10-20

Abstract

The invention relates to a rotary sealing ring applied to a wet-type clutch. Dramatic abrasion is easy to occur on the traditional sealing ring under a high PV working condition, thereby resulting in failure of the sealing ring and further causing the wet-type clutch to lose the engagement function. By adopting a method for setting an isobathic rectangular groove on the end surface of the sealing ring, the invention provides sufficient lubricant medium for a friction working surface to produce dynamic pressure lubrication, thereby greatly improving the operating performance of the sealing ring. The method is simple and effective, is easy for promotion, and solves an important technical problem for the design of a high-speed and high-pressure wet-type clutch.

Description

Sealing ring with isobathic rectangular groove on end surface

Technical field

The invention belongs to the liquid in rotation obturator, a kind of rotating seal ring that is applied in the wet clutch of more specifically saying so.

Background technique

The rotating seal ring that uses in the present wet clutch, its PV value allowable is lower.When the PV value raise, sharply wearing and tearing and hot tearing can appear in the seal face of rotating seal ring, caused rotating seal ring to lose efficacy, and made wet clutch also lose combined function indirectly.Thereby, under the situation that does not change the rotating seal ring size, if can improve the work PV value of rotating seal ring, then the operating oil pressure of wet clutch and working speed also will get a promotion, therefore wet clutch can be arranged in high speed shaft, optimize the layout of mechanical transmission inner components.

Summary of the invention

Purpose of the present invention is just at the problems referred to above, adopt seal face to open the method for rectangle groove, improve the allowable pressure of seal ring work and the upper limit of rotating speed, thereby improve its work PV value and working stability, and provide sealing to ensure the clutch designs of high rotating speed, high pilot pressure.

The technological scheme that technical solution problem of the present invention is adopted is: by opening rectangle groove at the end face of seal ring, the hydraulic oil of abundance is introduced seal face, strengthen lubrication effect; Rectangle groove can produce the step effect in the flow field, make fluid produce hydrodynamic lubrication, improves the sealing surface service behaviour.For making seal ring satisfy different usage requirements under different operating modes, to the size of seal ring be distributed with following requirement: the length of rectangle groove is between poor 0.1 times to 0.9 times in the inside and outside radius of seal ring footpath; The width of rectangle groove between 0.5mm between the 5mm; The rectangle groove distribution form is for circumferentially uniform, and the angle between the center line of adjacent two grooves is between 1 ° to 90 °; The deep equality of all rectangle grooves, and the degree of depth of each groove is constant, the degree of depth of rectangle groove is between between 0.2 times to 0.8 times of seal ring thickness; The poor ratio in the thickness of seal ring and inside and outside radius footpath is between 0.5 to 1.5.

Beneficial effect of the present invention: adopt patent of the present invention not changing under the prerequisite that has rotating seal ring cardinal principle size now, improve the seal ring service behaviour, simple and practical, be easy to realize that being applicable to that vehicle uses with various wet clutches and other rotates oil-tightening occasion.

Description of drawings

Fig. 2 is a wet clutch of the present invention rotating seal ring plan view;

Fig. 1 is the A-A view of Fig. 2;

Fig. 3 is that the B of Fig. 2 is to view;

Fig. 4 is the installment state of rotating seal ring in wet clutch.

In Fig. 1～4: dark rectangle groove such as 1-, 2-seal ring overlap joint mouth, 3-oil-feed cover, the 4-seal ring, 5-seal ring mounting groove, 6-joins oil jacket, 7-abrasive end face, 8-filler opening.

Map parameter explanation: r ₀Be seal ring internal diameter, r ₁For seal ring external diameter, c are that the length of rectangle groove, width that a is rectangle groove, the degree of depth that h is rectangle groove, thickness, the d that b is seal ring be directly poor for an overlap joint mouthful gap, dr.

Embodiment

Referring to Fig. 4, this figure has embodied the installment state of rotating seal ring in wet clutch.As shown in FIG., (8) are the filler opening of clutch among the figure, and oil-feed cover (3) is used for to the wet type clutch feed, and the oil-feed cover is for non-rotary; Join oil jacket (6) and be used for joining oil, join oil jacket along with clutch shaft rotates together to the piston cylinder of wet type clutch; The periphery of joining oil jacket (6) has seal ring mounting groove (5), and rotating seal ring just is installed in this groove.Before the assembling, need earlier with oil-feed cover (3) with join oil jacket (6) and separate; Then rotating seal ring (4) is strutted, be inserted in respectively and join in the seal ring mounting groove of opening on oil jacket (6) cylindrical (5), note, must will have a side of rectangle groove (1) on the seal ring (4) towards the abrasive end face (7) of joining on the oil jacket; At last, the oil jacket (6) of joining that rotating seal ring (4) will be housed inserts in the oil-feed cover (3), finishes the installation of rotating seal ring.

During seal ring work, width is introduced seal face (7) to the even depth rectangle groove (1) between the 5mm with high voltage control oil between 0.5mm; The oil pressure of control oil can provide certain static pressure to support to seal ring simultaneously; Join oil jacket (6) rotation make etc. dark rectangle groove (1) fluid on every side with etc. dark rectangle groove (1) produce relative movement since etc. the step effect of dark rectangle groove (1), be in fluid seal face (7) dynamic pressure effect of seal face (7) this moment.More than the stack of three kinds of effects, can improve the service behaviour of seal ring greatly, prolong its working life simultaneously.

Claims

1. wet clutch rotating seal ring is characterized in that: the seal ring end face has circumferentially uniform even depth rectangle groove, and meets certain width-diameter ratio requirement.

2. wet clutch rotating seal ring according to claim 1, it is characterized in that: seal face has rectangle groove (1), the length c of rectangle groove is between between 0.1 times to 0.9 times of the poor dr in the inside and outside radius of seal ring footpath, the width a of rectangle groove between 0.5mm between the 5mm.

3. wet clutch rotating seal ring according to claim 1 is characterized in that: the rectangle groove distribution form is for circumferentially uniform, and the angle between the center line of adjacent two grooves is between 1 ° to 90 °.

4. wet clutch rotating seal ring according to claim 1 is characterized in that: the deep equality of all rectangle grooves, and the degree of depth of each groove is constant, the degree of depth of rectangle groove is between between 0.2 times to 0.8 times of thickness b.

5. wet clutch rotating seal ring according to claim 1 is characterized in that: the ratio of the thickness b of seal ring and the poor dr in footpath is between 0.5 to 1.5.