CN201363417Y - High-performance mechanical seal end face - Google Patents

Abstract

A high-performance mechanical seal end face of the utility model is characterized in that a dynamic pressure groove group is composed of two types of arc grooves of an open grooves (A) and a closed grooves (B) which are distributed at intervals, the outer side of the open groove (A) is communicated with the outer diameter of the end face, the closed groove (B) is positioned in the middle of the end face, the inner arc circle diameter of the closed groove (B) is equal to the inner arc circle diameter phi2 of the open groove (A), phi2 = (0.25-0.5)*( phi4-phi1)+phi1, the outer arc circle diameter of the closed groove (B) is phi3, wherein phi3 = (1-4)*2+phi2, and the two end sides of the groove are transited through a circular arc (R). The high-performance mechanical seal end face has easy and convenient fabrication, and the end face seal is stable and the reliability is excellent, thereby being able to be reversibly used and bear higher pressure.

Description

High performance mechanical seal end plane

Technical field

The utility model relates to the friction fit ring of mechanical seal device---the end-face structure of rotating ring or stationary ring.

Background technique

On the end face of the rotating ring of mechanical seal device frictional fit or stationary ring, offer groove, produce hydrodynamic effect and counterflow pump and draw effect, the frictional fit end face that makes gas or liquid enter rotating ring and stationary ring forms air film or liquid film, making rotating ring and stationary ring form non-contact cooperates, reduce the frictional heat of end face greatly, play effect lubricated and that increase the service life, can prevent that again sealed liquid medium from reaching sealing purpose by the frictional fit face leakage of rotating ring and stationary ring simultaneously.On abrasive end face, offer the dynamic pressure groove of superperformance, can effectively improve the performance of frictional fit end face.Chinese patent CN981035752, CN011022132, CN03234764.2 is disclosed is exactly this class technology.The difference that prior art dynamic pressure groove shape is offered, each is different for its performance characteristics.The offering of dynamic pressure groove will have not only preferably that shape also will help manufacturing to improve dynamic pressure effect and adverse current pumping effect, is convenient to processing to reduce production costs.

The model utility content

It is simple and convenient that the purpose of this utility model provides a kind of processing, and dynamic pressure effect and adverse current pumping effect are good, end face seal stability and good reliability, can be two-way the high performance mechanical seal end plane that uses of rotation.

The utility model along the circumferential direction evenly is distributed on the kinetic friction ring of mechanical seal device or static friction ring end face and is provided with dynamic pressure groove group, dynamic pressure groove group is by two kinds of open type groove A and blind groove B curve bath spaced apart composition, the inner arc circular diameter of open type groove A is Φ 2, the outside of open type groove A communicates with the end face external diameter, the wide H=of arc (0.3～0.6) π * Φ 4/2N of open type groove A, medium directly enters among the open type groove A by outside notch; Blind groove B is positioned at the end face middle part, the inner arc circular diameter Φ 2 of the inner arc circular diameter of blind groove B and open type groove A is equal to, Φ 2=(0.25～0.5) * (Φ 4-Φ 1)+Φ 1, outer arc circular diameter Φ 3=(1～4) * 2+ Φ 2 of blind groove B, the arc angle width Q＜360/2N of blind groove B on circumference, the groove depth of open type groove A and blind groove B is 0.1～0.4mm, and the both end sides of groove is the circular arc R transition.

Φ 1: the abrasive end face internal diameter;

Φ 2: the inner arc circular diameter of open type groove (A) and blind groove (B);

Φ 3: the outer arc circular diameter of blind groove (B);

Φ 4: the abrasive end face external diameter;

N: the groove number of open type groove (A) and blind groove (B);

H: the arc of open type groove (A) is wide;

Q: the arc angle width of blind groove (B) on circumference.

The utility model processing is simple and convenient, dynamic pressure effect and adverse current pumping effect are good, the end face seal reliability is good, can two-way rotation use, after the relative frictional rotation of two friction sealed end faces, medium enters seal face by open type groove A, expands rapidly because of being subjected to frictional heat, simultaneously because the existence of blind groove B is arranged, delay end face liquid film speed of expansion, thereby make end face thinning of liquid film and even, make seal face that fabulous lubricated and sealing, end face seal working stability be arranged, and can bear higher pressure, proper functioning under the 18MPa operating mode by experiment, the end-face friction temperature is low, and consumed power is little.

Description of drawings

Fig. 1 is the utility model example structure schematic representation.

Fig. 2 is the A-A sectional view of Fig. 1, has represented open type groove A.

Fig. 3 is the B-B sectional view of Fig. 1, has represented the open type groove

Embodiment

The utility model even open type groove A and two kinds of curve baths of blind groove B of offering spaced apart along the circumferential direction on the kinetic friction ring of mechanical seal device or static friction ring end face, the inner arc circular diameter of open type groove A is Φ 2, the outside of open type groove A communicates with the abrasive end face external diameter, the wide H=of arc (0.3～0.6) π * Φ 4/2N of open type groove A; Blind groove B is positioned at the end face middle part, the inner arc circular diameter Φ 2 of the inner arc circular diameter of blind groove B and open type groove A is equal to, Φ 2=(0.25～0.5) * (Φ 4-Φ 1)+Φ 1, outer arc circular diameter Φ 3=(1～4) * 2+ Φ 2 of blind groove B, wide Q＜the 360/2N of blind groove B arc, the groove depth of open type groove A and blind groove B is 0.1～0.4mm, and the degree of depth of the big time slot of seal face diameter is darker relatively, and the both end sides of groove is the circular arc R transition.

The utility model testing property:

Mechanical seal specification: kinetic friction ring slippage diameter 85mm.

Medium and temperature: normal-temperature water, pressure: 0～18MPa, rotating speed: 3000r/mim.Running is more than 100 hours continuously under setting pressure, and the result is;

When pressure was 0～6MPa, mechanical seal end surface did not have any leakage of as seen minding;

When pressure was 6～10MPa, the average amount of leakage of mechanical seal end surface was 2～8mL/h;

When pressure was 10～15MPa, the average amount of leakage of mechanical seal end surface was 10～15mL/h;

When pressure was 15～18MPa, the average amount of leakage of mechanical seal end surface was 15～35mL/h.

Turn round under above working condition, mechanical seal end surface does not all have and can obviously show abrasion, and both ends of the surface approach contactless state.

Claims (1)

1, high performance mechanical seal end plane, on the kinetic friction ring of mechanical seal device or static friction ring end face, along the circumferential direction evenly be distributed and be provided with dynamic pressure groove group, it is characterized in that dynamic pressure groove group is by two kinds of open type groove (A) and blind groove (B) curve bath spaced apart composition, the inner arc circular diameter of open type groove (A) is Φ 2, the outside of open type groove (A) communicates with the end face external diameter, the wide H=of arc (0.3～0.6) π * Φ 4/2N of open type groove (A); Blind groove (B) is positioned at the end face middle part, the inner arc circular diameter Φ 2 of the inner arc circular diameter of blind groove (B) and open type groove (A) is equal to, Φ 2=(0.25～0.5) * (Φ 4-Φ 1)+Φ 1, outer arc circular diameter Φ 3=(1～the 4) * 2+ Φ 2 of blind groove (B), wide Q＜the 360/2N of blind groove (B) arc, the groove depth of open type groove (A) and blind groove (B) is 0.1～0.4mm, and the both end sides of groove is circular arc (R) transition;

Φ 1: the end face internal diameter;

Φ 2: the inner arc circular diameter of open type groove (A) and blind groove (B);

Φ 3: the outer arc circular diameter of blind groove (B);

Φ 4: the end face external diameter;

N: the groove number of open type groove (A) and blind groove (B);

H: the arc of open type groove (A) is wide;

Q: the arc angle width of blind groove (B) on circumference.

Images