CN2385155Y

CN2385155Y - Curved series rotary sealing element

Info

Publication number: CN2385155Y
Application number: CN98206135U
Authority: CN
Inventors: 刘文敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-25
Filing date: 1998-06-25
Publication date: 2000-06-28
Anticipated expiration: 2008-06-25

Abstract

The utility model relates to a curve series rotary sealing member, belonging to the class of mechanical standard members. The scheme is put forward in order the overcome the problems that making a non-circular oblique groove in a hole of a part has large difficulty and high cost. The curve series rotary sealing member comprises two kinds of a lip edge type and an O-shaped sealing ring type. A lip-shaped sealing member is provided with 1-5 lip edges which are contacted with the surface of a part of a shaft class in a sealing seat, and the sections of the 1-5 lip edges are inequilateral trapezoids or triangles. The 1-5 lip edges can also be deformed into O-shaped rings in rectangular grooves in the sealing seat. The expanding pictures of each lip edge and each rectangular groove are all provided with cosine curves with two wave peaks and two wave troughs. The scheme is that an oblique groove part which is difficult is process is put forward to be made into a standard member, which can enhance quantity, and can lower cost, and the service life of a complete machine is enhanced.

Description

The series of curves rotating seal

The utility model belongs to the standard piece class in the mechanical fitting, and it is specifically related to a kind of structure of novel Sealing.

In common mechanical, be to guarantee the life-span of running gear, avoid dust in the rugged environment or various abrasive particle to enter and the wearing and tearing that cause, often adopt Sealing to make the inside and outside isolation of machinery.Use in the machinery of Sealing at needs, its mechanical failure has more greatly on Sealing, and the damage of Sealing can cause the wearing and tearing of mechanical operating part and form fault that very the person can lose the ability to work of complete machine.In multiple mechanical seal, the use of O shape circle has the low characteristics of cost simple in structure, between reciprocating even part, seal, its effect is more satisfactory, if it is just relatively poor O shape circle to be used in when doing sealing between the even part of fixed point rotation its working life, reason is that O shape circle can not get due lubricating on the rubbing surface of motion, has so just influenced the working life of O shape circle.But 1970's end can prolong 15 times the working life of its Sealing when just proposing O-ring seals is placed in the tipper that becomes 5 ° with the axis normal face in application circle of engineering.It is very difficult dark skewed slot such as will processing in the hole of other part, and this promotes just for the use of tipper and brings great difficulty.

The purpose of this utility model is for solving the processing problems of tipper in the hole, special this programme------series of curves rotating seal that proposes, it is that unmanageable tipper is put forward, method with a kind of compression moulding makes sealing seat, it is a kind of novel standard seal part, can adapt to the sealing of fuselage and fixed point rotatingshaft, it can be produced in enormous quantities, reduce cost significantly, can also guarantee airtight quality, the efficient and the working life of improving complete machine.

By as above design, the series of curves rotating seal that this programme provided is that the form with sealing seat is installed between fuselage and the running shaft, its outer edge surface is the cylndrical surface of matching with the fuselage hole, it is characterized in that having in the sealing seat the in addition contacted lip of part limit of one or more and axle class, the sectional shape on its lip limit can be that inequilateral is trapezoidal or triangular shaped, and the circumference expanding map on this lip limit is individual curve clocklike.

In this programme, two crests and two troughs are arranged in the circumference expanding map on rotating seal epipharynx limit.The curve law of its unfolded drawing is a cosine curve.The number on lip limit is 1～5.Lip limit in its sealing seat can also be the O shape circle that is contained in the groove of sealing seat rectangular cross-section, and its groove width matches with the O-ring seals diameter of section.

Adopt this programme can embody following superiority: the 1. groove that encloses for the O shape of device inclination, arbitrfary point on the bottom land must all equate the perpendicular distance between the inner hole surface, otherwise just can not guarantee that O-ring seals can both have equal decrement on each position, also just can not guarantee reliable sealing, this groove is the groove of a particular curve shape, the big cost height of its processing method difficulty, tipper part and O shape circle are put forward to make standardized Sealing, can reduce cost significantly, and easy to use; 2. O shape circle and sealing seat are made the rotating seal that the one form that connects body has just formed the integral type on many lips limit, can arbitrarily choose with the situation of spatial position as required; 3. the sealing seat of the Sealing of this standard can adopt the method for compression moulding, can specializedly in force produce after the standardization, is convenient to improve airtight quality, has also just increased mechanical working life; 4. it is simple in structure, better function, requirement are big, is suitable for producing in batches and promotes the use of.

Fig. 1 is the structural representation of lip limit type rotating seal in this programme series of curves rotating seal.

Fig. 2 is the structural representation that another variant embodiment is adorned the rotating seal of O shape circle in this programme series of curves rotating seal in the groove of sealing seat.

Fig. 3 is the user mode schematic representation of lip limit type rotating seal in machinery.

Fig. 4 is the user mode schematic representation of rotating seal in machinery of O-ring seals type.

The embodiment of existing accompanying drawings this programme.The rotating seal of this series of curves includes two kinds of forms, the one, the rotating seal of lip limit type, another is the rotating seal of O-ring seals type, the rotating seal of its lip limit type is that lip limit part and sealing seat are integral, directly contact on the part surface in addition with the axle class by a plurality of lips limit 1, the outer edge surface of sealing seat matches with the fuselage hole, the sectional shape on lip limit can be that inequilateral is trapezoidal, triangle, on line shape between each bottom, lip limit is not done concrete qualification, can be circular arc or broken line shape, the quantity on its lip limit is 1 to 5, Fig. 1 is the sectional drawing of the rotating seal of lip limit type, its curve has two crests and two troughs in its circumference expanding map, its curve can be a cosine curve, also can be the curve of other rule, and this part is because of adopting integral structure with sealing seat and lip limit, it should adopt soft material, can contact nearly with the surface of axle spare to guarantee its lip limit; Fig. 2 is the rotating seal of O-ring seals type, on its internal surface of sealing seat, make the rectangle groove 2 of curve law, its cross section is a rectangle, in groove, place O-ring seals 3, its groove width matches with the O-ring seals diameter of section, this groove has two crests and two troughs on its circumference expanding map, it can be the rule of cosine curve, it also can be the rule of other curve, the any point of this groove bottom land all equates the perpendicular distance of internal surface, this can guarantee that the O shape circle on the arbitrary position all has identical decrement, and general compressibility should be 3～8%.

Fig. 3 is the user mode figure of lip limit type rotating seal, the outer edge surface of lip-type seal spare matches with the endoporus of seal gland 4, gland props up by the step surface and the bearing outer ring gland 5 of inside, the external diameter of bearing outer ring gland matches with the internal diameter of fuselage bearing hole and the internal diameter of seal gland, the lip limit of Sealing contacts with the outer edge surface that is fixed on the bearing inner race clamping sleeve 7 of axle on 6, adopt scyewed joint between bearing inner race clamping sleeve and the axle, the front end of bearing inner race clamping sleeve with spool between also it is obturaged with O-ring seals.Fig. 4 is that its structure content of user mode figure and Fig. 3 of rotating seal of this programme variant embodiment O-ring seals type is similar.

Claims

1. series of curves rotating seal, it is that form with sealing seat is installed between fuselage and the running shaft, its outer edge surface is the cylndrical surface of matching with the fuselage hole, it is characterized in that having in the sealing seat the in addition contacted lip of part limit (1) of one or more and axle class, the sectional shape on its lip limit can be that inequilateral is trapezoidal or triangular shaped, and the circumference expanding map on this lip limit is individual curve clocklike.

2. according to the described Sealing of claim 1, it is characterized in that in its circumference expanding map on lip limit two crests and two troughs being arranged.

3. according to the described Sealing of claim 1, it is characterized in that the curve law of unfolded drawing on its lip limit is a cosine curve.

4. according to the described Sealing of claim 1, the number that it is characterized in that its lip limit is 1～5.

5. according to the described Sealing of claim 1, it is characterized in that its interior lip limit of sealing seat is the O shape circle (3) that is contained in the sealing seat rectangular cross-section groove (2), its groove width matches with the O-ring seals diameter of section.