CN202370791U

CN202370791U - Mechanical sealing device for screw-type compressor

Info

Publication number: CN202370791U
Application number: CN201120576663XU
Authority: CN
Inventors: 何斌波
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-08-08
Anticipated expiration: 2021-12-19

Abstract

The utility model discloses a mechanical sealing device for a screw-type compressor, which comprises a stationary ring, a moving ring, a moving ring seat, a spring and a transmission seat, wherein the stationary ring is fixedly installed in a casing, is in sealed connection with the casing through a stationary ring seal ring and is in gap match with a rotary shaft. The transmission seat is sleeved on the rotary shaft and provided with a pushing face of the spring. One end of the moving ring abuts against the stationary ring, the rotary seal surface accuracy is adopted between abutting-against end faces of the stationary ring and the moving ring, four evenly-distributed notches are radially arranged on the outer surface of the moving ring, the side wall of the moving ring seat is provided with convex lugs matched with the notched of the moving ring, and the assembled convex lugs of the moving ring seat are embedded into the notches of the moving ring. The transmission seat is fixedly connected with the rotary shaft through an inner hexagonal fastening screw, the transmission seat, the spring, the moving ring seat and the moving ring rotate jointly, and the pushing action of the spring to the moving ring seat enables certain abutting-against pressure to be retained between the moving ring and the stationary ring so as to form end face sealing. An existing rubber corrugated pipe fastening transmission mechanical sealing device is changed into a floating mechanical sealing device, the mechanical seal failure caused by indeterminate motor-rotating direction in machine debugging is avoided, the sealing performance is improved, and the service lives of products are prolonged.

Description

A kind of screw compressor is used mechanical seal device

Technical field

The utility model relates to a kind of mechanical seal device, and particularly a kind of screw compressor is used mechanical seal device.

Background technique

Existing screw compressor generally adopts the fastening gearing sealing of rubber corrugated pipe.There is shortcoming down in the mechanical seal of this structure:

1, mechanical seal torsion when the machine debugging starts, because the motor sense of rotation is uncertain, causes spring failure by the spring transmission, thereby causes mechanical seal to be lost efficacy;

2, the compressor main shaft shifting amount is big, and the rubber corrugated pipe compensation rate is little, causes the seal face can't normally closed, influences sealability.

The model utility content

The utility model is the defective that exists in the above existing technology in order to overcome, and changes the fastening gearing seal arrangement of existing rubber corrugated pipe into the float type mechanical seal device.

For realizing above-mentioned purpose; The utility model provides a kind of improved screw compressor to use mechanical seal device; The rotating shaft that is socketed in the Seal cage is outside; This device comprises: stationary ring, and it is fixedly installed in the casing and through the stationary ring seal ring and is connected with casing sealing, and stationary ring and rotating shaft are Spielpassung; Rotating seat, it is socketed in the rotating shaft; Rotating ring, its be socketed in the rotating shaft and be located at stationary ring and rotating seat between, rotating ring rubbing surface and stationary ring rubbing surface connect, the abutment end mask of dynamic and static ring has the surface accuracy of rotary seal; Moving ring sleeve is connected in the rotating shaft and through seal ring of moving ring and is connected with rotating shaft sealing; Retainer, it is socketed in the rotating shaft and is fixedly connected with rotating shaft through interior hexagonal Cock screw; Spring is socketed in the rotating shaft, and an end is connected on the rotating seat, and the other end is connected on the retainer, it is characterized in that, rotating seat, retainer smaller diameter end have the claw that is uniformly distributed with the setting and is surrounded on rotating shaft; Rotating ring floats through seal ring of moving ring and is connected on the rotating seat.

In technique scheme, the surface of rotating seat ring is provided with a plurality of stamping forming caving inward week, is used to grip rotating ring, and the rotating ring surface is provided with corresponding otch.

In technique scheme; Rotating seat is the ladder cylindrical-shaped structure, and the open face of its enlarged diameter section is to stationary ring and be socketed in the rotating ring outside, and the vertical transitional surface and the spring of its ladder connect; Constitute the spring push face of retainer, reduced diameter section is socketed in the spring and the claw of a plurality of convexities is set.

In technique scheme, the claw of rotating seat is four, equidistantly is surrounded on rotating shaft.

In technique scheme, be socketed on retainer in the rotating shaft, be dismountable the fixed connection between retainer and the rotating shaft.

In technique scheme, retainer is the ladder cylindrical-shaped structure, and the vertical transitional surface and the spring of its ladder connect, and constitutes the spring push face of retainer, and reduced diameter section is socketed in the spring and the claw of four convexities is set.

In technique scheme, the claw of retainer is four, equidistantly is surrounded on rotating shaft.

In technique scheme, the depression number is four, encircles all equidistance and is arranged at the large diameter surface of rotating seat, and extend axially from uncovered.

In technique scheme, the rotating ring surface is provided with the otch that adapts with rotating seat, and the sunk part of rotating seat embeds in the breach of rotating ring, forms rotating ring and the counterrotating constraint of rotating seat.

In technique scheme, rotating seat and retainer are through claw clamping and form counterrotating constraint mutually.

Compared with prior art, the utlity model has following beneficial effect: owing to adopted claw transmission torsion, the mechanical seal that the uncertainty of motor sense of rotation is brought when having overcome the machine debugging was lost efficacy; Adopt big spring, float type mechanical seal, when the compressor main shaft shifting amount was big, big spring still can normally compensate, and the mechanical seal proper functioning that remains unchanged has improved sealability, has prolonged the working life of product.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model stationary ring generalized section;

Fig. 3 is the utility model rotating ring generalized section;

Fig. 4 is the utility model rotating ring structural representation;

Fig. 5 is the utility model rotating seat generalized section;

Fig. 6 is the utility model rotating seat structural representation;

Fig. 7 is the utility model spring structure schematic representation;

Fig. 8 is the utility model retainer generalized section;

Fig. 9 is the utility model retainer structural representation.

In conjunction with the accompanying drawing following reference character of mark above that:

1-stationary ring seal ring; The 2-stationary ring; The 3-rotating ring; The 4-seal ring of moving ring; The 5-rotating seat; The 6-spring; The 7-retainer; Hexagonal Cock screw in the 8-; The 9-rotating shaft; The 10-casing; The 31-otch; The 51-lug; The 52-claw; The 71-claw.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the utility model is described in detail, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.

The screw compressor of the utility model is as shown in Figure 1 with mechanical seal device, and this device is enclosed within rotating shaft 9 outsides in the casing 10, comprises stationary ring 2, rotating ring 3, rotating seat 5, spring 6, retainer 7 etc.Stationary ring 2 is fixedly installed in the casing 10 and through stationary ring seal ring 1 and casing 10 and is tightly connected, and stationary ring 2 is a Spielpassung with rotating shaft 9.Retainer 7 is socketed in the rotating shaft 9, and has the pushing tow face of spring 6.Rotating ring 3 is located between stationary ring 2 and retainer 5 rotating seats 5; Rotating ring 3 one ends and stationary ring 2 connect; Have the surface accuracy (promptly forming end face seal) of rotary seal between the butt end face of dynamic and static ring, like Fig. 3, Fig. 4, shown in Figure 5, the outer surface of rotating ring 3 radially has four otch that are uniformly distributed with 31; The sidewall of rotating seat 5 has the lug 51 that matches with rotating ring 3 otch, and the lug 51 of assembling back rotating seat 5 embeds in the otch 31 of rotating ring 3.

Further as shown in Figure 1, rotating seat 5 is the ladder cylindrical-shaped structure, and the open face of its enlarged diameter section is to stationary ring 2 and be socketed in the outside of rotating ring 3, and the vertical transitional surface and the spring 6 of its ladder connect, and constitute the spring push face of rotating seat 5.The seal ring of moving ring 4 that the flexible material of clamping is processed between rotating ring 3 and the rotating seat 5.

Further like Fig. 1, Fig. 5, Fig. 6, Fig. 8, shown in Figure 9; The reduced diameter section of rotating seat 5 is socketed in the spring 6 and axially is provided with and is surrounded on four claws 52 of rotating shaft; Retainer 7 is the ladder cylindrical-shaped structure; The vertical transitional surface and the spring 6 of its ladder connect, and constitute the spring push face of retainer 7.Reduced diameter section is socketed in the spring 6 and axially is provided with and is surrounded on four claws 71 of rotating shaft 9, and the claw 52 of rotating seat 5 is socketed in the claw 71 of retainer 7.In the using process; Retainer 7 is fixedly connected with rotating shaft 9 through interior hexagonal Cock screw 8; Retainer 7, spring 6, rotating seat 5, rotating ring 3 will rotate jointly, and the effect of pushing of 6 pairs of rotating seats 5 of spring makes and remains certain butt pressure between rotating ring 3 and the stationary ring 2, forms end face seal.

More than a disclosed specific embodiment that is merely the utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into the protection domain of the utility model.

Claims

1. a screw compressor is used mechanical seal device, and the rotating shaft that is socketed in the Seal cage is outside, comprising:

Stationary ring, it is fixedly installed in the casing and through the stationary ring seal ring and is connected with casing sealing, and stationary ring and rotating shaft are Spielpassung;

Rotating seat, it is socketed in the rotating shaft;

Rotating ring, its be socketed in the rotating shaft and be located at said stationary ring and said rotating seat between, said rotating ring rubbing surface and said stationary ring rubbing surface connect, the abutment end mask of said dynamic and static ring has the surface accuracy of rotary seal; Said moving ring sleeve is connected in the rotating shaft and through seal ring of moving ring and is connected with rotating shaft sealing;

Retainer, it is socketed in the rotating shaft and is fixedly connected with rotating shaft through interior hexagonal Cock screw;

Spring is socketed in the rotating shaft, and an end is connected on the said rotating seat, and the other end is connected on the said retainer; It is characterized in that said rotating seat, retainer smaller diameter end have the claw that is uniformly distributed with the setting and is surrounded on rotating shaft; Said rotating ring floats through seal ring of moving ring and is connected on the said rotating seat.

2. mechanical seal device according to claim 1 is characterized in that, the surface ring of said rotating seat is provided with a plurality of stamping forming caving inward week, is used to grip said rotating ring, and said rotating ring surface is provided with corresponding otch.

3. mechanical seal device according to claim 1 and 2; It is characterized in that; Said rotating seat is the ladder cylindrical-shaped structure, and the open face of its enlarged diameter section is to said stationary ring and be socketed in the said rotating ring outside, and the vertical transitional surface and the said spring of its ladder connect; Constitute the spring push face of said retainer, reduced diameter section is socketed in the said spring and the claw of a plurality of convexities is set.

4. mechanical seal device according to claim 3 is characterized in that, the claw of said rotating seat is four, equidistantly is surrounded on rotating shaft.

5. mechanical seal device according to claim 1 is characterized in that, the said retainer of socket in the rotating shaft is dismountable the fixed connection between said retainer and the rotating shaft.

6. according to claim 1 or 5 described mechanical seal device; It is characterized in that; Said retainer is the ladder cylindrical-shaped structure; The vertical transitional surface and the said spring of its ladder connect, and constitute the spring push face of said retainer, and reduced diameter section is socketed in the said spring and the claw of four convexities is set.

7. mechanical seal device according to claim 6 is characterized in that, the claw of said retainer is four, equidistantly is surrounded on rotating shaft.

8. mechanical seal device according to claim 2 is characterized in that, said depression number is four, encircles all equidistance and is arranged at the large diameter surface of said rotating seat, and extend axially from uncovered.

9. mechanical seal device according to claim 1; It is characterized in that; Said rotating ring surface is provided with the otch that adapts with said rotating seat, and the sunk part of said rotating seat embeds in the breach of said rotating ring, forms said rotating ring and the counterrotating constraint of said rotating seat.

10. mechanical seal device according to claim 1 is characterized in that, said rotating seat and said retainer are through claw clamping and form counterrotating constraint mutually.