CN210715248U

CN210715248U - Self-cleaning mechanical sealing device of single-end-face centrifugal pump

Info

Publication number: CN210715248U
Application number: CN201920983847.4U
Authority: CN
Inventors: 张文龙; 韩沛
Original assignee: Nanjing Rixin Fluid Technology Co Ltd
Current assignee: Nanjing Rixin Fluid Technology Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-06-09
Anticipated expiration: 2029-06-27

Abstract

The utility model provides a self-cleaning formula mechanical seal device of single-end-face centrifugal pump, including the main shaft of end-to-end connection impeller, the cover has the pump cover in the outer fringe of main shaft, and sealed between pump cover and the main shaft is realized by rotating ring, rotating ring retainer plate, quiet ring retainer plate. The utility model discloses it is fixed with impeller with the fixed anti-thread that leads to of rotating ring and rotating ring to utilize evenly distributed's sealing spring in large quantity, the even advantage of atress distribution, sealing end obtains timely, sufficient compensation when drunkenness to impeller axial, has guaranteed in sealed stability and the pump transportation process's health and safety.

Description

Self-cleaning mechanical sealing device of single-end-face centrifugal pump

Technical Field

The utility model relates to a field specifically is a self-cleaning formula mechanical seal device of single-end face health type centrifugal pump for prevent that health type centrifugal pump material from revealing.

Background

At present, the sanitary centrifugal pump is mostly applied to industries with higher sanitary requirements such as food, beverage, pharmacy, brewing and the like. In these industries, hygienic dead corners and bacteria residues must be prevented during cleaning, and the operation conditions of the centrifugal pump are very harsh, such as gas-liquid mixing during CIP backflow, transportation of media which are easy to crystallize, corrode or contain particles, and the like, and the conditions have great challenges on stable operation and clean and sanitary of the mechanical seal of the pump. Most of the existing mechanical seals enable the static ring to be tightly matched by means of axial force generated by the wave spring, and material leakage is prevented. However, when the working condition of gas-liquid mixed transportation is faced, the traditional wave spring often fails to compensate in time due to the continuous change of the pressure in the pump and the abrasion of the sealing end face, so that the material leakage is caused; for the transport of media which are prone to crystallization, corrosion and high temperatures, the sealing end face often fails due to insufficient flushing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve prior art's problem, provide a single-ended centrifugal pump self-cleaning formula mechanical seal device for prevent that sanitary type centrifugal pump material from revealing, guaranteed in sealed stability and the pump transportation process's health and safety.

The utility model discloses an end-to-end connection has the main shaft of impeller, and the cover has the pump cover in the outer fringe of main shaft, impeller and pump cover outer fringe between have the clearance, be connected with rotating ring, rotating ring retainer plate, quiet ring and quiet ring retainer plate between the clearance of impeller and pump cover.

The movable ring fixing ring is connected with the impeller through threads to fix the movable ring and the impeller, and the movable ring and the impeller back plate are sealed through a movable ring O-shaped ring; the static ring fixing ring is provided with a plurality of through holes, one part of the sealing spring is inserted into the holes, and the other part of the sealing spring is mutually abutted and compressed with the pump cover, so that the sealing pressure exists on the sealing end surface between the static ring and the movable ring; the fixed ring and the pump cover are sealed by a fixed ring O-shaped ring.

The further improvement is that the fixed ring of the static ring is fixed by an anti-rotation pin to prevent rotation.

The utility model has the advantages that:

1. the advantages of more sealing springs which are uniformly distributed and uniform stress distribution are utilized, and the sealing end face is timely and sufficiently compensated when the impeller axially moves.

2. The movable ring is fixed on the impeller through reverse threads, and the movable ring O-shaped ring is used for sealing between the impeller back plate and the mechanical seal, so that the sealing stability is ensured.

3. In the whole conveying process, the conveying medium is only contacted with the movable ring, the static ring and the O-shaped ring, so that the sanitation and the safety of the conveying process in the pump are ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The structure of the utility model is as shown in figure 1, comprising a main shaft 12 with the end connected with an impeller 10, a pump cover 8 is sleeved on the outer edge of the main shaft 12, a gap exists between the impeller 10 and the outer edge of the pump cover 8, and a movable ring 2, a movable ring fixing ring 9, a static ring 3 and a static ring fixing ring 4 are connected between the gap between the impeller 10 and the pump cover 8; one end of the impeller 10 is connected with the main shaft 12, and the other end is connected with the pump shell 11.

The movable ring fixing ring 9 fixes the movable ring 2 and the impeller 10 through threaded connection, and the movable ring 2 and the impeller back plate 10 are sealed through the movable ring O-shaped ring 1; a plurality of through holes are formed in the static ring fixing ring 4, one part of the sealing spring 6 is inserted into the holes, and the other part of the sealing spring is mutually abutted and compressed with the pump cover 8, so that sealing pressure exists on the sealing end surface between the static ring 3 and the movable ring 2; the stationary ring fixing ring 4 and the pump cover 8 are sealed by a stationary ring O-shaped ring 5.

The stationary ring fixing ring 4 is fixed through an anti-rotation pin 7.

The utility model discloses mechanical seal mutually supports through rotating ring and quiet ring end face, and a plurality of even little springs of atress possess sufficient compression offset, reach the effect that can in time compensate when the axial float of impeller. The dynamic and static ring O-shaped ring can realize mechanical seal and seal between the pump cover and the impeller.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims

1. The utility model provides a self-cleaning formula mechanical seal device of single-end-face centrifugal pump, includes main shaft (12) that end connection has impeller (10), and the cover has pump cover (8), its characterized in that on the outer fringe of main shaft (12): a gap exists between the impeller (10) and the pump cover (8), and a moving ring (2), a moving ring fixing ring (9), a static ring (3) and a static ring fixing ring (4) are connected between the gap between the impeller (10) and the pump cover (8);

the movable ring fixing ring (9) fixes the movable ring (2) and the impeller (10) through threaded connection, and the movable ring (2) and a back plate of the impeller (10) are sealed through a movable ring O-shaped ring (1); a plurality of through holes are formed in the static ring fixing ring (4), one part of the sealing spring (6) is inserted into the hole, and the other part of the sealing spring is mutually abutted and compressed with the pump cover (8), so that sealing pressure exists on the sealing end face between the static ring (3) and the movable ring (2); the stationary ring fixing ring (4) and the pump cover (8) are sealed by a stationary ring O-shaped ring (5).

2. The self-cleaning mechanical seal of a single-ended centrifugal pump according to claim 1, wherein: the fixed ring fixing ring (4) is fixed through an anti-rotation pin (7).