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CN-224214428-U - Dual mechanical sealing device for pump

CN224214428UCN 224214428 UCN224214428 UCN 224214428UCN-224214428-U

Abstract

The utility model relates to the technical field of pump shaft sealing and discloses a double mechanical sealing device for a pump, which comprises a pump shaft body, wherein a sealing element is arranged on one side of the pump shaft body, a sealing mechanism for sealing the pump shaft is arranged in the sealing element, a guiding mechanism for guiding the pump shaft is arranged on the left side of the sealing mechanism, a heat dissipation mechanism for dissipating heat of the guiding mechanism is arranged on the left side of the pump shaft body, the sealing mechanism comprises a sealing groove, the sealing groove is arranged on the outer surface of the pump shaft body, a sealing ring in interference fit with the sealing groove is fixed in the sealing element, an installation groove is arranged in the sealing groove, and a rubber ring is arranged in the installation groove. According to the utility model, under the action of the elasticity of the compression spring, the movable plate can be pushed to compress the rubber ring, so that the rubber ring is deformed under the pressure of two sides, the inner side and the outer side of the rubber ring are better attached to the pump shaft body and the mounting groove, and better sealing effect is ensured.

Inventors

  • XIAO LI
  • MENG HANBING

Assignees

  • 高道流体密封(陕西)有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (10)

  1. 1. The double mechanical sealing device for the pump comprises a pump shaft body (1) and is characterized in that a sealing piece (2) is arranged on one side of the pump shaft body (1), a sealing mechanism for sealing the pump shaft is arranged in the sealing piece (2), a guiding mechanism for guiding the pump shaft is arranged on the left side of the sealing mechanism, and a heat dissipation mechanism for dissipating heat of the guiding mechanism is arranged on the left side of the pump shaft body (1); The sealing mechanism comprises a sealing groove (3), the sealing groove (3) is formed in the outer surface of the pump shaft body (1), a sealing ring (31) in interference fit with the sealing groove (3) is fixed in the sealing piece (2), an installation groove (32) is formed in the sealing groove (3), and a rubber ring (33) is installed in the installation groove (32).
  2. 2. A dual mechanical seal device for a pump according to claim 1, wherein the two sides of the rubber ring (33) are abutted against the movable plate (34), and the side wall of the movable plate (34) is abutted against the compression spring (35) fixedly connected with the mounting groove (32).
  3. 3. A double mechanical seal device for a pump according to claim 2, wherein the guiding mechanism comprises a fixed bearing (4), and the fixed bearing (4) is embedded in the inner wall of the sealing element (2).
  4. 4. A double mechanical seal device for a pump according to claim 3, wherein the upper surface of the seal member (2) is screw-fitted with a jack screw (41) which is in abutting connection with the outer wall of the fixed bearing (4).
  5. 5. A dual mechanical seal device for a pump as set forth in claim 4, wherein four sets of heat pipes (42) are penetrated on the left side of said seal member (2), and heat radiating fins (43) are fixed on the ends of each of the four sets of heat pipes (42).
  6. 6. A double mechanical seal device for a pump according to claim 5, wherein a fixing plate (44) is installed at one end of the seal member (2), and four fixing bolts (45) screwed with the seal member (2) are symmetrically installed inside the fixing plate (44).
  7. 7. A double mechanical sealing device for a pump according to claim 6, wherein the heat dissipation mechanism comprises a connecting rod (5), and the connecting rod (5) is connected to one end of the pump shaft body (1) in a plugging manner.
  8. 8. The double mechanical sealing device for the pump according to claim 7, wherein the fan blades (51) are fixed at the tail end of the connecting rod (5), and a limit bolt (52) in abutting connection with the connecting rod (5) is arranged on the outer surface of the connecting rod (5).
  9. 9. A double mechanical sealing device for a pump according to claim 8, wherein four fixing holes (6) are symmetrically formed on one side of the sealing member (2).
  10. 10. The double mechanical sealing device for the pump is characterized in that a connecting plate (7) is fixed on the outer wall of the pump shaft body (1), and four fixing screws (8) in threaded connection with the fixing holes (6) are symmetrically arranged inside the connecting plate (7).

Description

Dual mechanical sealing device for pump Technical Field The utility model relates to the technical field of pump shaft sealing, in particular to a double mechanical sealing device for a pump. Background The mechanical sealing device for pump is a key component for starting state sealing action in pump equipment, is mainly used for preventing fluid medium in pump from leaking to outside through pump shaft, and is formed from at least one pair of end faces perpendicular to rotating axis, also includes the components of elastic element, auxiliary sealing ring, gland and shaft sleeve, etc.. The movable ring is arranged on the movable ring seat and rotates together with the shaft, and the static ring is arranged on the static ring seat of the pump body and is a static part. The axial sealing end surfaces of the movable ring and the static ring are tightly attached and slide relatively by means of the pressure of the medium and the elasticity of the elastic element, so that the leakage of fluid is prevented. Meanwhile, the sealing is realized through auxiliary sealing rings at the positions of the movable ring, the shaft, the stationary ring, the gland and the like. In prior art, as the high sealed water pump bearing that publication number CN214248022U discloses, it includes bearing outer lane and bearing inner race, first ring channel has been seted up at bearing outer lane inner peripheral wall both ends, the second ring channel has been seted up to corresponding first ring channel position on the bearing inner race outer peripheral wall, two all rise in the first ring channel and be provided with the tight lip that rises, the tight lip that rises extends to the second ring channel has first seal lip and second seal lip, the tight cooperation setting that rises of first seal lip and second ring channel inner wall, the second seal lip supports to lean on the bearing inner peripheral wall, the draw-in groove has been seted up between first seal lip and the second seal lip, the draw-in groove is the cyclic annular setting. The hardness of the tension lip is improved through the arrangement of the steel framework, so that the tension lip cannot be separated from the bearing when the bearing is subjected to the radial load of the shaft, and the stability of the tension lip on the bearing is further improved. The hardness of the tensioning lip is improved through the arrangement of the steel framework, so that the tensioning lip cannot be separated from the bearing when the bearing receives the radial load of the shaft, but the sealing effect of the sealing device on the pump shaft is poor only by using the bearing, and the sealing effect cannot be better. Disclosure of utility model This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model. In view of the problem that in the prior art, only a bearing is used for sealing the pump shaft, so that a good sealing effect cannot be achieved. In order to achieve the above purpose, the present utility model provides the following technical solutions: The double mechanical sealing device for the pump comprises a pump shaft body, wherein a sealing piece is arranged on one side of the pump shaft body, a sealing mechanism for sealing the pump shaft is arranged in the sealing piece, a guiding mechanism for guiding the pump shaft is arranged on the left side of the sealing mechanism, and a heat dissipation mechanism for dissipating heat of the guiding mechanism is arranged on the left side of the pump shaft body; the sealing mechanism comprises a sealing groove, the sealing groove is formed in the outer surface of the pump shaft body, a sealing ring in interference fit with the sealing groove is fixed in the sealing piece, a mounting groove is formed in the sealing groove, and a rubber ring is mounted in the mounting groove. As a still further proposal of the utility model, two sides of the rubber ring are respectively abutted with a movable plate, and the side wall of the movable plate is abutted with a compression spring fixedly connected with the mounting groove. As a still further aspect of the utility model, the guide mechanism includes a fixed bearing embedded in an inner wall of the seal. As a still further scheme of the utility model, the upper surface of the sealing element is provided with a jackscrew in abutting connection with the outer wall of the fixed bearing. As a still further proposal of the utility model, the left side of the sealing element is penetrated with four groups of heat pipes, and the tail ends of the four groups of heat pipes are all fixed with radiating fins. As a still further scheme of the utility model, one end of the sealing element is provided with a fixin