CN210397140U

CN210397140U - Water pump with mechanical seal structure

Info

Publication number: CN210397140U
Application number: CN201920901046.9U
Authority: CN
Inventors: 汪树旗; 谢永强; 谷建辉
Original assignee: Jinan Kinry Biotechnology Co ltd
Current assignee: Jinan Kinry Biotechnology Co ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-04-24
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a water pump with a mechanical sealing structure, which comprises a motor, a rotating shaft pump body, an impeller and a pump cover; a mechanical seal is arranged between the outer side wall of the rotating shaft and the pump body, a mechanical seal cavity is formed between the inner surface of the impeller and the inner side wall of the pump cover, and the inner end surface of the impeller is connected with a movable knife; a fixed knife is fixedly connected to the pump cover, and the fixed knife is close to the movable knife; a plurality of mounting blocks which are arranged at equal intervals are arranged on the inner end surface of the impeller, grooves are formed in the bottoms of the mounting blocks, and the movable cutters are spirally connected with the grooves; be equipped with the derivation hole on the interior terminal surface of impeller, the one end and the mechanical seal of derivation hole communicate with each other and be connected, and the other end communicates with each other with the pump chamber of the pump body and is connected, the utility model discloses simple structure has fine protection effect to mechanical seal, has prolonged the life of water pump.

Description

Water pump with mechanical seal structure

Technical Field

The utility model relates to a mechanical seal technical field specifically is a water pump with mechanical seal structure.

Background

In the prior art, in equipment such as a pump, a compressor and the like, a transmission shaft penetrates inside and outside the equipment, a circumferential gap exists between the shaft and the equipment, a medium in the equipment leaks outwards through the gap, and if the pressure in the equipment is lower than the atmospheric pressure, air leaks into the equipment, so that a shaft sealing device for preventing the leakage is required. The mechanical seal is one of the shaft seal devices, called end face seal, and is a device for preventing fluid leakage, which is formed by keeping fit and relative sliding of at least one pair of end faces perpendicular to a rotary transmission axis under the action of fluid pressure and the elastic force or magnetic force of a compensation mechanism and the cooperation of auxiliary seal, and has simple structure and convenient assembly and disassembly; however, there are some disadvantages: under the condition that the overflowing water has more impurities, particularly the sand content is high, due to the friction of silt, a rubber part or a filler used for sealing is seriously damaged and can damage a contact surface contacted with the rubber part or the filler, the sealing is required to be replaced in half a year, and a large shaft cylindrical surface can generate a pit, so that the sealing effect is failed, and the mechanical sealing device cannot be well protected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water pump with mechanical seal structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a water pump with a mechanical sealing structure comprises a motor, a rotating shaft pump body, an impeller and a pump cover; a mechanical seal is arranged between the outer side wall of the rotating shaft and the pump body, a mechanical seal cavity is formed between the inner surface of the impeller and the inner side wall of the pump cover, and the inner end surface of the impeller is connected with a movable knife; a fixed knife is fixedly connected to the pump cover, and the fixed knife is close to the movable knife; a plurality of mounting blocks which are arranged at equal intervals are arranged on the inner end surface of the impeller, grooves are formed in the bottoms of the mounting blocks, and the movable cutters are spirally connected with the grooves; the inner end face of the impeller is provided with a leading-out hole, one end of the leading-out hole is communicated and connected with the mechanical seal, and the other end of the leading-out hole is communicated and connected with the pump cavity of the pump body.

Preferably, the mechanical seal is mounted in a mechanical seal cavity.

Preferably, the inner end surface of the pump cover is provided with a positioning groove, and the fixed cutter is embedded into the positioning groove.

Preferably, the fixed knife is coaxially connected with the rotating shaft, a plurality of circulation grooves are uniformly formed in the outer end face of the fixed knife, and two ends of each circulation groove are respectively communicated with the mechanical seal and the pump cavity of the pump body.

Preferably, the fixed knife is made of stainless steel materials and has the characteristic of long service life.

Preferably, the internal surface of circulation recess is equipped with a plurality of archs, makes the impurity that gets into in the circulation recess can receive great resistance, prolongs the cutting time of activity sword to impurity, makes cutting effect good.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model drives the impeller and the movable knife connected with the impeller to rotate through the rotating shaft at the motor, the movable knife rotates relative to the national fixed knife to cut impurities entering the circulation groove, and the cut impurity particles flow out through the guide hole, so that larger impurity particles are not easy to enter the mechanical seal, and the mechanical seal has good protection effect;

2. the utility model discloses a be equipped with the recess in the installation piece, pass through threaded connection between the activity swordfish recess for installation, dismantlement are convenient, make things convenient for later stage change, maintenance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the pump cover of the present invention;

fig. 3 is a schematic structural view of a middle impeller portion of the present invention.

In the figure: 1. a motor; 2. a rotating shaft; 3. a pump body; 4. mechanical sealing; 5. an impeller; 6. a pump cover; 7. a mechanically sealed cavity; 8. a movable knife; 9. fixing a knife; 10. mounting blocks; 11. a groove; 12. a flow-through groove; 13. a lead-out hole; 14. and (4) protruding.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a water pump with a mechanical sealing structure comprises a motor 1, a rotating shaft 2, a pump body 3, an impeller 5 and a pump cover 6; a mechanical seal 4 is arranged between the outer side wall of the rotating shaft 2 and the pump body 3, a mechanical seal cavity 7 is formed between the inner surface of the impeller 5 and the inner side wall of the pump cover 6, and a movable knife 8 is connected to the inner end surface of the impeller 5; the pump cover 6 is fixedly connected with a fixed knife 9, and the fixed knife 9 is close to the movable knife 8;

a plurality of mounting blocks 10 which are arranged at equal intervals are arranged on the inner end surface of the impeller 5, grooves 11 are formed in the bottoms of the mounting blocks 10, and the movable knife 8 is in spiral connection with the grooves 11; the inner end surface of the impeller 5 is provided with a leading-out hole 13, one end of the leading-out hole 13 is communicated and connected with the mechanical seal 4, and the other end is communicated and connected with the pump cavity of the pump body 3.

Preferably, the mechanical seal 4 is mounted in a mechanical seal cavity 7.

Preferably, the inner end surface of the pump cover 6 is provided with a positioning groove, and the fixed knife 9 is embedded into the positioning groove.

Preferably, the fixed knife 9 is coaxially connected with the rotating shaft 2, a plurality of circulation grooves 12 are uniformly formed in the outer end face of the fixed knife 9, and two ends of each circulation groove 12 are respectively communicated with the mechanical seal 4 and the pump cavity of the pump body 3.

Preferably, the fixed knife 9 is made of stainless steel material.

Preferably, the inner surface of the flow-through groove 12 is provided with a plurality of protrusions 14.

The working principle is as follows: when the cutting device is used, the motor 1 is turned on, the motor 1 drives the impeller 5 and the movable cutter 8 connected with the inner end face of the impeller 5 to rotate through the rotating shaft 2, impurities in the pump cavity of the pump body 3 flow into the mechanical seal cavity 7 through the circulation groove 12, the movable cutter 8 rotates relative to the fixed cutter 9 to cut the impurities entering the circulation groove 12, the cutting effect is good, large impurity particles are not prone to entering the mechanical seal 4, the mechanical seal 4 is well protected, and the service life of the water pump is prolonged; the cut impurities flow out of the guide-out hole 13 and are not easy to enter the mechanical seal 4, and the mechanical seal is also well protected; the inner end face of the impeller 5 is provided with a plurality of mounting blocks which are arranged at equal intervals, the lower parts of the mounting blocks are provided with grooves 11, and the movable knife 8 and the fish grooves 11 are connected through threads, so that the mounting and dismounting are convenient, and the later-stage replacement and maintenance are convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A water pump with a mechanical sealing structure is characterized by comprising a motor (1), a rotating shaft (2), a pump body (3), an impeller (5) and a pump cover (6); a mechanical seal (4) is arranged between the outer side wall of the rotating shaft (2) and the pump body (3), a mechanical seal cavity (7) is formed between the inner surface of the impeller (5) and the inner side wall of the pump cover (6), and a movable knife (8) is connected to the surface of the inner end of the impeller (5); a fixed knife (9) is fixedly connected to the pump cover (6), and the fixed knife (9) is close to the movable knife (8);

a plurality of mounting blocks (10) which are arranged at equal intervals are arranged on the inner end surface of the impeller (5), grooves (11) are formed in the bottoms of the mounting blocks (10), and the movable knife (8) is in spiral connection with the grooves (11); the inner end surface of the impeller (5) is provided with a leading-out hole (13), one end of the leading-out hole (13) is communicated and connected with the mechanical seal (4), and the other end is communicated and connected with the pump cavity of the pump body (3).

2. The water pump with the mechanical seal structure according to claim 1, wherein: the mechanical seal (4) is arranged in the mechanical seal cavity (7).

3. The water pump with the mechanical seal structure according to claim 1, wherein: the inner end face of the pump cover (6) is provided with a positioning groove, and the fixed cutter (9) is embedded into the positioning groove.

4. The water pump with the mechanical seal structure according to claim 1, wherein: the fixed cutter (9) is coaxially connected with the rotating shaft (2), a plurality of circulation grooves (12) are uniformly formed in the outer end face of the fixed cutter (9), and two ends of each circulation groove (12) are respectively communicated with the mechanical seal (4) and a pump cavity of the pump body (3).

5. The water pump with the mechanical seal structure according to claim 1, wherein: the fixed knife (9) is made of stainless steel material.

6. A water pump with a mechanical seal structure according to claim 4, characterized in that: the inner surface of the circulation groove (12) is provided with a plurality of bulges (14).