Impeller and sealing device for preventing particulate matter clamping stagnation

Abstract

The invention relates to the technical field of mechanical engineering, in particular to an impeller and a sealing device for preventing particulate matter clamping stagnation. The impeller comprises an impeller body, scrapers are arranged on the outer ring of the front end of the impeller body and / or the outer ring of the rear end of the impeller body, the inner ends of the scrapers are fixedly connected with the impeller body, and the outer ends of the scrapers are exposed out of the outer ring of the impeller body. A scraper is arranged on the impeller body, a particle containing groove is formed in one side of the scraper, the particle containing groove is fixedly formed in the impeller body, and the width of the portion, exposed out of the outer ring of the impeller body, of the outer end of the scraper ranges from 0.2 mm to 0.5 mm. The sealing device for preventing particulate matter clamping stagnation comprises a pump body, a pump shaft, a pump cover, a front sealing ring and a rear sealing ring, the impeller is arranged on the pump shaft, and the rear sealing ring is arranged on the pump shaft. According to the centrifugal pump, the structure is ingenious, particulate matter on the sealing rings can be scraped off, the impeller rotates smoothly, the sealing performance is good, and the operation reliability is high.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical engineering, and in particular to an impeller and a sealing device for preventing particles from getting stuck. Background Art

[0002] As is known to all, the existing centrifugal pump mainly includes a pump body, a pump shaft, an impeller, a pump cover, a front sealing ring and a rear sealing ring. The pump body is provided with an impeller and a pump shaft. The pump shaft is fixedly connected to the pump cover via a mechanical seal and a bearing. The pump cover is fixedly connected to the pump body. The impeller is fixed on the pump shaft. The front end outer ring of the impeller is sealed via a front sealing ring fixed on the pump body, and the rear end outer ring is sealed via a rear sealing ring fixed on the pump cover. Because when the centrifugal pump is conveying liquid, when the liquid contains more particulate matter or the dissolved matter in the liquid is easy to precipitate crystals, these particulate matter or crystals often accumulate on the sealing ring during the liquid conveying process, causing the impeller to rotate stuck or even unable to rotate. In addition, the particulate matter will also wear the sealing ring or the pump body, causing the seal to fail and reducing the service life of the pump body. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and to provide an impeller and a sealing device that prevents particles from getting stuck, which has an ingenious structure and can scrape off particles on a sealing ring, has smooth impeller rotation, good sealing performance, and high operating reliability.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: An impeller comprises an impeller body, characterized in that: a scraper is provided on the outer ring at the front end of the impeller body and / or the outer ring at the rear end of the impeller body, the inner end of the scraper is fixedly connected to the impeller body, the outer end of the scraper is exposed from the outer ring of the impeller body, one side of the scraper is provided with a particle accommodating groove, the particle accommodating groove is fixedly arranged on the impeller body, so that when in use, the scraper is installed on the outer ring of the impeller body, the impeller body drives the scraper to rotate, the scraper scrapes off the particles on the sealing ring, and the particles fall into the particle accommodating groove and are washed away.

[0005] One end of the particle containing groove of the present invention extends to the end of the impeller body to facilitate axial discharge of particles.

[0006] The width of the outer end of the scraper exposed from the outer ring of the impeller body is between 0.2-0.5mm.

[0007] A sealing device for preventing particles from getting stuck, comprising a pump body, a pump shaft, a pump cover, a front sealing ring and a rear sealing ring, characterized in that: the pump shaft is provided with the impeller described above, and there is a gap between the front sealing ring and / or the rear sealing ring and the scraper, so that the scraper can scrape off particles on the front sealing ring and the rear sealing ring without contacting the front sealing ring and the rear sealing ring, thereby preventing interference.

[0008] Due to the adoption of the above structure, the present invention has the advantages of ingenious structure, ability to scrape off particles on the sealing ring, smooth rotation of the impeller, good sealing performance, high operating reliability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the impeller in the present invention.

[0010] Figure 2 It is a side view of the impeller of the present invention when in use.

[0011] Figure 3 It is a schematic structural diagram of a sealing device for preventing particles from getting stuck in the present invention.

[0012] Reference numerals: impeller body 1 , scraper 2 , particle receiving groove 3 , pump body 4 , pump shaft 5 , pump cover 6 , front sealing ring 7 , rear sealing ring 8 . DETAILED DESCRIPTION

[0013] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0014] An impeller comprises an impeller body 1, characterized in that: a scraper 2 is provided on the outer ring at the front end of the impeller body 1 and / or the outer ring at the rear end of the impeller body 1, the scrapers 2 are arranged at intervals, the inner ends of the scrapers 2 are fixedly connected to the impeller body 1, and the outer ends of the scrapers 2 are exposed from the outer ring of the impeller body 1, and a particle accommodating groove 3 is provided on the impeller body 1 on one side of the scraper 2, the particle accommodating groove 3 is arranged corresponding to the scraper 2, and the groove wall on one side of the particle accommodating groove 3 is fixedly connected to the scraper 2, so that when in use, the scraper is installed on the outer ring of the impeller body, the impeller body drives the scraper to rotate, the scraper scrapes off the particles on the sealing ring, and the particles fall into the particle accommodating groove and are washed away.

[0015] One end of the particle containing groove 3 of the present invention extends to the end of the impeller body 1 to facilitate axial discharge of particles.

[0016] The width of the outer end of the scraper 2 exposed from the outer ring of the impeller body 1 is between 0.2-0.5 mm.

[0017] A sealing device for preventing particles from getting stuck, comprising a pump body 4, a pump shaft 5, a pump cover 6, a front sealing ring 7 and a rear sealing ring 8. The connection relationship between the pump body 4, the pump shaft 5, the pump cover 6, the front sealing ring 7 and the rear sealing ring 8 is the same as that in the prior art and will not be repeated herein. The invention is characterized in that: the pump shaft 5 is provided with the impeller mentioned above, and there is a gap between the front sealing ring 7 and / or the rear sealing ring 8 and the scraper 2, so that the scraper can scrape off the particles on the front sealing ring and the rear sealing ring without contacting the front sealing ring and the rear sealing ring, and no interference will occur.

[0018] As attached Figure 1 -Attached Figure 3 , install the impeller body 1 onto the pump shaft 5, the front end outer ring of the impeller body 1 is sealed and connected via the front sealing ring 7 fixed on the pump body 4, and the rear end outer ring is sealed and connected via the rear sealing ring 8 fixed on the pump cover 6. The front end outer ring of the impeller body 1 is evenly distributed with scrapers 2, and there is a gap between the scrapers 2 and the front sealing ring 7, that is, the scrapers 2 do not contact the front sealing ring 7. The number of scrapers 2 is set according to demand, such as 3 or 4. The scrapers 2 rotate with the impeller body 1, and a particle receiving groove 3 is provided on one side of the scraper 2 that is rotated out. The particle receiving groove 3 is a slot, and the front end of the particle receiving groove 3 extends forward to the front end of the impeller body 1, so that when the impeller body 1 rotates, the scraper 2 is driven to scrape off the particles on the front sealing ring 7, and the particles fall into the particle receiving groove 3 with the force of the scraper 2. The particles on the rear sealing ring 8 are scraped off by the scraper 2 on the outer ring at the rear end of the impeller body 1, and fall into the particle containing groove 3, and are then washed away by the fluid in the pump body 4. The structure of the present invention is ingenious, and the particles accumulated on the front sealing ring 7 and the rear sealing ring 8 can be scraped off. The impeller body 1 rotates smoothly, preventing the rotor from getting stuck, and improving the operating reliability of the pump group. At the same time, it does not affect the sealing between the impeller body 1 and the front sealing ring 7 and the rear sealing ring 8, ensuring that the dynamic and static rotors in the pump body 4 always maintain a reasonable operating clearance, thereby extending the service life of the pump body 4.

[0019] Due to the adoption of the above structure, the present invention has the advantages of ingenious structure, ability to scrape off particles on the sealing ring, smooth rotation of the impeller, good sealing performance, high operating reliability, etc.

Claims

1. An impeller, comprising an impeller body, characterized in that: The front end outer ring of the impeller body and / or the rear end outer ring of the impeller body are provided with a scraper, the inner end of the scraper is fixedly connected to the impeller body, the outer end of the scraper is exposed from the outer ring of the impeller body, and one side of the scraper is provided with a particle accommodating groove, and the particle accommodating groove is fixedly set on the impeller body.

2. An impeller according to claim 1, characterized in that: One end of the particle containing groove extends to the end of the impeller body.

3. An impeller according to claim 1, characterized in that: The width of the outer end of the scraper exposed from the outer ring of the impeller body is between 0.2-0.5mm.

4. A sealing device for preventing particles from getting stuck, comprising a pump body, a pump shaft, a pump cover, a front sealing ring and a rear sealing ring, characterized in that: The pump shaft is provided with the impeller described in claim 1, 2 or 3, and there is a gap between the front sealing ring and / or the rear sealing ring and the scraper.

Images