CN2869403Y

CN2869403Y - Mechanical sealing for pump

Info

Publication number: CN2869403Y
Application number: CN 200520104811
Authority: CN
Inventors: 赵才甫; 沈国连; 赵国忠
Original assignee: NANFANG SPECIFIC PUMP INDUSTRY Co Ltd HANGZHOU
Current assignee: Nanfang Pump Industry Co.,Ltd.
Priority date: 2005-08-10
Filing date: 2005-08-10
Publication date: 2007-02-14
Anticipated expiration: 2015-08-10

Abstract

The utility model relates to a mechanical sealing of pump, a rotating seal ring and a stationary seal ring are fitted over a driving sleeve and the two friction surfaces elastically contacted, the stationary seal ring and driving sleeve surface are clearance fit, a stationary O type sealing ring is arranged in the concave platform, a stationary seal ring sleeve is covered on the stationary O type sealing ring, the stationary O type sealing ring is also arranged in outside grooves of stationary seal ring sleeve and the stationary seal ring sleeve is fix to locating ring of shaft rightwards; the rotating O type sealing ring is arranged in the concave platform inside rotating seal ring, the other end surface of rotating seal ring is thrust ring, the drive pin is arranged on rotating seal ring, the spring seat is fitted over rotating seal ring, thrust ring and driving sleeve, the spring is arranged in spring seat. Advantages: 1. The utility model has integrated structure, compact structure, safety and reliable performance, convenient for disassembly and assembly; 2. With loose embedded rotating seal ring, the utility model cannot be deformed by temperature change; 3. The O type ring cannot be burnt in operation condition without water for a plurality of hours and the no leakage can be realized.

Description

Mechanical seal for pump

Technical field:

The utility model relates to a kind of mechanical seal for pump, belongs to mechanical seal and makes the field.

Background technique:

CN2205472Y, title " a kind of front-mounted pump mechanical seal ", this model utility discloses a kind of front-mounted pump mechanical seal that the generator set front-mounted pump is used that is used for, the improvement of carrying out on former basis, improving back stationary ring (19) is that stationary ring wear ring (12) is formed with stationary seat (13).Sealing O-ring seals between rotation ring seat (10) and the mechanical seal sleeve (1) is made up of rotating ring seal ring second (7), rotating ring O-ring seals (8) and rotating ring seal ring first (9) after improving.Its deficiency: the one, complex structural designs, manufacture cost height; The 2nd, stationary ring antifriction ring is embedded in the stationary seat, because stationary ring antifriction ring is different with the stationary seat material, and its thermal expansion coefficient difference, so temperature influence stationary ring antifriction circumpolar is yielding, directly has influence on its sealability; The 3rd, rotary seat is endeavoured the rotation of rotating ring antifriction ring by spring band, because the degree of finish of rotating ring rub resistance ring and stationary ring rub resistance anchor ring is very high, it is often very big to meet the suction that is produced behind the water, only depends on the elastic force of spring can't open the face that it holds, and causes mechanical seal to lose efficacy; The 4th, not only complex structure, and coupling poor sealing performance, working life is short.

Summary of the invention:

Purpose of design: avoid the deficiency in the background technique, design a kind of one be simple in structure, cost is low, the 2nd, the coupling good seal performance, the mechanical seal for pump of long service life.

Design proposal: in order to realize above-mentioned purpose of design, on structural design: the one, stationary ring is elastic packing with the end face of rotating ring and touches mutually, and rotating ring rotates with driving sleeve and forms the dynamic elasticity sealing with the end face of stationary ring and combines; The 2nd, rotating ring O RunddichtringO in the groove of rotating ring inboard is provided with, and be with throw-out collar in the other end of rotating ring, and make the close ring of its rotating ring O type form the dynamic elasticity sealing, sealability is more reliable; The 3rd, between concave station outside throw-out collar and spring seat spring is set, force that the throw-out collar end face contacts with the other end elastic tight of rotating ring, an end face of rotating ring contacts with the end face elastic tight of stationary ring, form the sealing of dynamic and static elastic packing and dynamic elasticity, prevent the fluid leakage; The 4th, stationary ring and driving sleeve are Spielpassung, have avoided stationary ring to rotate with driving sleeve, have guaranteed the favorable elasticity sealing of stationary ring end face and rotating ring end face; The 5th, stationary ring O RunddichtringO and the matching structure that stationary ring overlaps in the concave station of the rotating ring outside have been guaranteed that not only stationary ring contacts with elastic packing between rotating ring, and have been had excellent sealing performance; The 6th, the reliable sealing between driving sleeve and transmission shaft has been guaranteed in the setting of driving sleeve inboard groove structure Design and groove intermediate solid drive shaft cover O RunddichtringO.Its technological scheme: rotating ring (8) is enclosed within on the driving sleeve (1) with stationary ring (9) and two rubbing surface elasticity are touched mutually, stationary ring (9) is Spielpassung with the driving sleeve face, concave station place on it is equipped with stationary ring O RunddichtringO (12), be with stationary ring cover (10) on the stationary ring O RunddichtringO (12), the groove in stationary ring cover (10) outside is built-in with stationary ring cover O RunddichtringO (11), stationary ring cover (10) is kept right and is fixed on the positioning ring (13) on the axle, the inboard concave station of rotating ring (8) is built-in with rotating ring O RunddichtringO (6), rotating ring (8) other end is throw-out collar (5), driving pin (7) is positioned on the rotating ring (8), spring seat (3) is enclosed within rotating ring (8), on throw-out collar (5) and the driving sleeve (1), spring (4) is positioned at spring seat (3).The inboard groove of driving sleeve (1) is built-in with driving sleeve O RunddichtringO (2).

The utility model is compared with background technique, and the one, the design meets the DIN24960 standard; The 2nd, adopt the unit loading type structure, easy accessibility, compact structure, safe and reliable; The 3rd, rotating ring adopts gap edge, loosening damascene structures, is not subjected to temperature transition and is out of shape; The 4th, rotating ring O RunddichtringO is along with the pump internal pressure increases and auto lock; The 5th, drive rotating ring strong anti-hold structure of rotating by driving pin by spring seat and driving sleeve by rotating seat, under the effect of stopping machine inertial force, can open the flour milling that holds automatically; The 6th, because the O RunddichtringO adopts high-quality sizing material to make, can under anhydrous condition, turn round and do not burn the O RunddichtringO in a few hours, realized 0 leakage.

Description of drawings:

Fig. 1 is the schematic representation of mechanical seal for pump.

Embodiment:

Embodiment 1: with reference to accompanying drawing 1.Mechanical seal for pump, rotating ring 8 and stationary ring 9 adopt prior art to make and be enclosed within on the

driving sleeve

1, and 9 liang of rubbing surfaces of rotating ring 8 and stationary ring are elastic packing and touch mutually, stationary ring 9 is Spielpassung with the driving sleeve face, concave station place on it is equipped with stationary ring O RunddichtringO 12 and adopts prior art to make, be with stationary ring cover 10 on the stationary ring O RunddichtringO 12 and adopt prior art to make, the groove that stationary ring overlaps 10 outsides is built-in with stationary ring cover O RunddichtringO 11, stationary ring cover 10 is kept right and is fixed on the positioning ring 13 on the axle the recessed end Cock screw of hexagonal location in positioning ring 13 adopts with between centers.The concave station of rotating ring 8 inboards is built-in with rotating ring O RunddichtringO 6 and adopts prior art to make, and rotating ring 8 other ends are throw-out collar 5, and driving pin 7 is positioned on the rotating ring 8, and spring seat 3 is enclosed within on rotating ring 8, throw-out collar 5 and the driving sleeve 1, and spring 4 is positioned at spring seat 3.The groove of driving sleeve 1 inboard is built-in with driving sleeve O RunddichtringO 2.Positioning ring 13 is fixed on the driving sleeve 1.Spring seat 3 axle sleeve chamber interference are enclosed within on the driving sleeve 1.Its working principle: axle drives driving sleeve 1 and rotates, and driving sleeve 1 drives spring seat 3 and rotates, and spring seat 3 drives rotating ring 8 by driving pin 7 and rotates.

What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these explanations are just illustrative to the utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection domain of the present utility model.

Claims

1, a kind of mechanical seal for pump, it is characterized in that: rotating ring (8) is enclosed within on the driving sleeve (1) with stationary ring (9) and two rubbing surface elasticity are touched mutually, stationary ring (9) is Spielpassung with the driving sleeve face, concave station place on it is equipped with stationary ring O RunddichtringO (12), be with stationary ring cover (10) on the stationary ring O RunddichtringO (12), the groove in stationary ring cover (10) outside is built-in with stationary ring cover O RunddichtringO (11), stationary ring cover (10) is kept right and is fixed on the positioning ring (13) on the axle, the inboard concave station of rotating ring (8) is built-in with rotating ring O RunddichtringO (6), rotating ring (8) other end is throw-out collar (5), driving pin (7) is positioned on the rotating ring (8), spring seat (3) is enclosed within rotating ring (8), on throw-out collar (5) and the driving sleeve (1), spring (4) is positioned at spring seat (3).

2, mechanical seal for pump according to claim 1 is characterized in that: the inboard groove of driving sleeve (1) is built-in with driving sleeve O RunddichtringO (2).

3, mechanical seal for pump according to claim 1 is characterized in that: positioning ring (13) is fixed on the driving sleeve (1).

4, mechanical seal for pump according to claim 1 is characterized in that: spring seat (3) interference is enclosed within on the driving sleeve (1).