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CN-224228932-U - Take anticorrosive centrifugal pump of collection dress formula bi-polar face mechanical seal

CN224228932UCN 224228932 UCN224228932 UCN 224228932UCN-224228932-U

Abstract

The utility model relates to an anti-corrosion centrifugal pump with a container type double-end-face machine seal, which comprises a machine seal moving ring seat made of non-metal materials, a main shaft anti-corrosion sheath and a limiting pressing ring arranged at an axial gap between the machine seal and an impeller of the pump, a sealing structure arranged between an inner hole of the moving ring seat and the main shaft anti-corrosion sheath, and at least one sheath sealing ring. The utility model has the beneficial effects that the anti-corrosion protection sheath of the main shaft solves the anti-corrosion protection problem of an axial gap on the main shaft, the sheath sealing ring has higher radial deformation performance, can have good sealing performance when the nonmetallic moving ring seat with high plasticity of the mechanical seal generates micro thermal deformation, can avoid the problem that the nonmetallic moving ring seat generates new leakage points at the axial gap and further reduces the sealing performance due to thermal deformation, and the designed lining plastic type or full plastic type anti-corrosion centrifugal pump has excellent anti-corrosion performance and can convey most corrosive mediums after being matched with the integrated type double-end surface mechanical seal.

Inventors

  • JIANG LONGFU
  • GUO DANFENG
  • JIANG LINGCHAO

Assignees

  • 宜兴市宙斯泵业有限公司

Dates

Publication Date
20260512
Application Date
20231120

Claims (10)

  1. 1. The anti-corrosion centrifugal pump with the integrated double-end-face machine seal comprises a main shaft (1), a shaft seal (31), a pump shell (30), an impeller (7), an impeller splicing cap (28), a pump cover (29), a bearing bracket (32), a bearing (33), a side cover (34), a coupler (35), a motor (36) and a mounting base (37), wherein the shaft seal (31) is a machine seal (2), the machine seal (2) comprises a sealing box (21), a shaft sleeve (20), a movable ring (3), a movable ring seat (4), a stationary ring (8), a stationary ring seat (23), a spring (22), a cooling water sealing combination (24) and a positioning buckle (27), and a cooling water inlet (25) and a cooling water outlet (26) are formed in the sealing box (21), and the anti-corrosion centrifugal pump is characterized in that: The shaft sleeve (20) and the movable ring seat (4) are integrally formed; The movable ring seat (4) of the mechanical seal (2) is made of nonmetal materials; An axial gap (5) between the machine seal (2) and an impeller (7) of the pump is provided with a main shaft anti-corrosion sheath (6); The inner wall (15) of the movable ring seat (4) of the mechanical seal (2) close to the movable ring seat on one side of the main shaft (1) is provided with a movable ring seat inner hole (14), a containing cavity is arranged between the movable ring seat inner hole (14) and the main shaft anti-corrosion sheath (6), the containing cavity is used for installing a sealing structure, and the sealing structure is at least one sheath sealing ring (10).
  2. 2. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 1, wherein the sealing structure is a sheath sealing ring (10), and the sheath sealing ring (10) is an O-shaped sealing ring (11).
  3. 3. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 2 is characterized in that a limiting pressing ring (16) is further arranged on the side of the O-shaped sealing ring (11) close to the base part of the impeller (7).
  4. 4. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 1, wherein the sealing structure is two sheath sealing rings (10), the two sheath sealing rings (10) are O-shaped sealing rings (11), and the back O-shaped sealing ring pushes against the front O-shaped sealing ring.
  5. 5. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 4, wherein the O-shaped sealing ring (11) adjacent to the impeller (7) is further provided with a limiting pressing ring (16) close to the base side of the impeller (7).
  6. 6. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 1, wherein the sealing structure is two sheath sealing rings (10), the sheath sealing ring (10) far away from the impeller (7) is an O-shaped sealing ring (11), the sheath sealing ring (10) close to the impeller (7) is a V-shaped sealing ring (13), and a limiting pressing and fixing ring (16) is further arranged on the side, close to the base part of the impeller (7), of the V-shaped sealing ring (13).
  7. 7. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal according to claim 1, wherein the sealing structure is two sheath sealing rings (10), the sheath sealing ring (10) far away from the impeller (7) is an O-shaped sealing ring (11), the sheath sealing ring (10) close to the impeller (7) is a sealing ring (12) with a skirt, and a limiting pressing ring (16) is further arranged on the side, close to the base of the impeller (7), of the sealing ring (12) with the skirt.
  8. 8. The anti-corrosion centrifugal pump with the integrated double-end-face machine seal is characterized in that the sealing structure is two sheath sealing rings (10), the sheath sealing ring (10) far away from the impeller (7) is an O-shaped sealing ring (11), the sheath sealing ring (10) close to the impeller (7) is a sealing ring (12) with a skirt, an axial concave convex ring (18) is arranged on the skirt portion of the sealing ring (12) with the skirt, a movable ring seat convex ring (17) or a movable ring seat concave ring (19) which is matched with the axial concave convex ring (18) in shape is arranged on the movable ring seat (4), and the axial concave ring of the skirt portion of the sealing ring (12) with the skirt is buckled on the movable ring seat convex ring (17) on the movable ring seat (4), or the axial concave ring of the skirt portion of the sealing ring (12) with the skirt is buckled on the movable ring seat concave ring (19) on the movable ring seat (4).
  9. 9. The anti-corrosive centrifugal pump with a cartridge type double-end-face mechanical seal according to claim 1, wherein: The movable ring (3) is embedded on the movable ring seat (4), or the movable ring (3) is in a sleeve shape, and the movable ring (3) is sheathed on the periphery of the movable ring seat (4); The anti-corrosion centrifugal pump is a front suction type centrifugal pump with a suction inlet at the axial direction or a side suction type centrifugal pump with the suction inlet at the axial side; one end of the main shaft anti-corrosion sheath (6) extends radially outwards to form an L-shaped flanging.
  10. 10. The anti-corrosive centrifugal pump with a cartridge type double-end-face machine seal according to any one of claims 1, 3, 5, 6, 7, wherein: The overflow part of the anti-corrosion centrifugal pump is made of plastic or ceramic; The impeller (7), the pump cover (29) and the pump shell (30) are made of steel lining ultra-high molecular weight polyethylene, or the impeller (7), the pump cover (29) and the pump shell (30) are made of plastic; The sealing box (21) is made of plastic, metal or resin; The movable ring seat (4) is made of poly perfluoroethylene propylene, and the shaft sleeve (20) is made of 304 stainless steel; the movable ring (3) and the stationary ring (8) are made of silicon carbide; The sheath sealing ring (10) is a rubber sealing ring, a fluoroplastic sealing ring or a sealing ring with a plastic layer coated on the outer surface of the rubber; The limiting pressing ring (16) is made of metal or nonmetal with certain hardness, and the width of the limiting pressing ring (16) is determined by the distance between the sheath sealing ring (10) and the base part of the impeller (7).

Description

Take anticorrosive centrifugal pump of collection dress formula bi-polar face mechanical seal Technical Field The utility model belongs to the technical field of mechanical sealing, and particularly relates to an anti-corrosion centrifugal pump with a container type double-end-face mechanical seal. Background In the existing production process of the new energy battery material, various working conditions contain hydrochloric acid and hydrofluoric acid, but parts of the double-end-face mechanical seal in the market are made of stainless steel materials, and the stainless steel materials are not resistant to corrosion of the chlorine ion-containing and fluorine ion-containing mediums, so that the corrosion-resistant pump matched with the double-end-face mechanical seal made of the stainless steel materials cannot safely convey the chlorine ion-containing and fluorine ion-containing mediums, and if the production process of the new energy battery material is continuously matched with the corrosion-resistant centrifugal pump matched with the double-end-face mechanical seal made of the stainless steel materials, the requirements of the production process of the new energy and new materials cannot be met. The movable ring of the machine seal cannot be directly propped against the base part of the impeller, otherwise, the mounting disc of the container type machine seal is difficult to be fixedly connected with the pump shell part of the pump, so that a certain axial mounting distance is required to be reserved between the double-end-face machine seal and the impeller of the pump to form an axial gap; After the spindle is protected by adopting a machine seal made of a nonmetallic material, the anti-corrosion requirement is improved, a stainless steel anti-corrosion sheath does not meet the sealing requirement of an axial gap, and if the sheath of the spindle mounting interval section is made of ceramic or plastic materials, the strength is not enough, so that the anti-corrosion protection problem of the axial gap on the spindle is not feasible. In the prior art, the movable ring seat of the machine seal is made of stainless steel, the rigidity is good, the assembly of the sealing part can not generate thermal deformation, the anti-leakage mode between the movable ring seat of the machine seal and the main shaft of the machine seal is an O-shaped rubber ring, the original machine seal assembly is improved into a nonmetallic material for the anti-corrosion performance of the elevator seal, the movable ring seat of the nonmetallic machine seal is also made of a nonmetallic material, the heat deformation coefficient of the nonmetallic movable ring seat is large, the deformation is easy, if the original O-shaped rubber ring is still adopted as the anti-leakage mode between the machine seal and the main shaft of the machine seal, new leakage points can be generated at the axial clearance, and the sealing effect can be reduced. In summary, although the anti-corrosion performance of the machine seal is improved, the static sealing performance between the machine seal and the shaft is reduced, so that further improvement is required. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provides an anti-corrosion centrifugal pump with a container type double-end-face mechanical seal. The anti-corrosion centrifugal pump with the integrated double-end-face mechanical seal comprises a main shaft, a shaft seal, a pump shell, an impeller splicing cap, a pump cover, a bearing bracket, a bearing, a side cover, a shaft coupling, a motor and a mounting base, wherein the shaft seal is the mechanical seal; The shaft sleeve and the movable ring seat are integrally formed; The movable ring seat of the machine seal is made of a nonmetallic material, so that the problem that the conventional stainless steel container type double-end-face machine seal cannot safely convey mediums containing chloride ions and fluoride ions is solved, and the corrosion resistance level of the machine seal pump machine is improved; The main shaft anti-corrosion sheath is arranged at the axial gap between the machine seal and the impeller of the pump, so that the anti-corrosion protection problem of the axial gap on the main shaft is solved; The inner wall of the movable ring seat of the machine seal, which is close to one side of the main shaft, is provided with an inner hole of the movable ring seat, but the inner hole of the movable ring seat is easy to deform due to the large thermal deformation coefficient of the movable ring seat made of non-metal materials, so that the axial sealing performance of the part is affected, a cavity is required to be arranged between the inner hole of the movable ring seat and the main shaft anti-corrosion sheath, the cavity is used for installing a sealing structure, and the sealing structure is at least one sheath sealing ring. Preferably, the sealing structure is a sheath sealin