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CN-224214385-U - Novel shielding pump

CN224214385UCN 224214385 UCN224214385 UCN 224214385UCN-224214385-U

Abstract

The utility model discloses a novel shielding pump, which comprises a pump cylinder, wherein one end of the pump cylinder is provided with a liquid inlet, the other end of the pump cylinder is provided with a liquid outlet, a rotor shaft is arranged in the pump cylinder, a bearing seat, a rotor, a connecting seat and an impeller assembly are sequentially arranged on the rotor shaft from one end of the liquid inlet to the other end of the pump cylinder, a stator is sleeved outside the rotor, bearings are respectively arranged in the bearing seat and the connecting seat, the bearings are sleeved on the rotor shaft, and liquid through holes are further formed in the bearing seat and the connecting seat. The shielding pump has the beneficial effects that as the liquid inlet, the bearing seat, the rotor, the connecting seat, the impeller assembly and the liquid outlet are coaxially and sequentially arranged, the motor and the lubrication part are in a low-pressure environment, pumped liquid flow can take away bubbles and heat, the noise is reduced, and the service life is prolonged.

Inventors

  • WANG WENFENG

Assignees

  • 浙江仁泰泵业有限公司

Dates

Publication Date
20260508
Application Date
20250626

Claims (7)

  1. 1. The novel shielding pump comprises a pump cylinder, wherein one end of the pump cylinder is provided with a liquid inlet, the other end of the pump cylinder is provided with a liquid outlet, a rotor shaft is arranged between the liquid inlet and the liquid outlet in the pump cylinder, and the novel shielding pump is characterized in that a bearing seat, a rotor, a connecting seat and an impeller assembly are sequentially arranged at the other end of the pump cylinder from one end close to the liquid inlet to the other end close to the liquid outlet, a stator is sleeved on the periphery of the rotor in a clearance mode, bearings are respectively arranged in the bearing seat and the connecting seat, the bearings are sleeved on the rotor shaft, and liquid through holes which are axially arranged are respectively arranged in the bearing seat and the connecting seat.
  2. 2. The novel canned motor pump of claim 1, wherein the bearing is a bearing sleeve, pits are respectively arranged on the outer peripheral surface of the bearing sleeve and the end surface of the end far away from the rotor, and a buffer piece is arranged in each pit.
  3. 3. The novel canned motor pump of claim 1, wherein the rotor shaft is provided with positioning rings at two end surfaces of the rotor, the positioning rings are provided with annular grooves at the joint of the rotor shaft and the rotor, and sealing rings are arranged in the annular grooves.
  4. 4. The novel canned motor pump according to claim 2 or 3 wherein the liquid through holes are circumferentially and uniformly distributed at the positions of the bearing seat and the connecting seat close to the bearing sleeve, and the liquid through holes are communicated with the gaps between the stator and the rotor.
  5. 5. The novel canned motor pump as set forth in claim 1, 2 or 3 wherein the bearing seat is connected with the liquid inlet through a connecting pipe, and a through hole is formed in the connecting pipe and penetrates through the bearing seat and the liquid inlet.
  6. 6. The novel canned motor pump according to claim 1, 2 or 3 wherein the impeller assembly comprises an impeller and a guide vane, and the impeller is fixedly connected with the rotor shaft.
  7. 7. The novel canned motor pump according to claim 6, wherein the connection hole of the impeller is a kidney-shaped hole.

Description

Novel shielding pump Technical Field The utility model relates to the technical field of permanent magnet shielding pumps, in particular to a novel shielding pump. Technical Field The canned motor is characterized in that the stator and the rotor are respectively arranged in a sealed, non-magnetic and corrosion-resistant metal cylinder, the stator provides a rotating magnetic field to drive the rotor to rotate, the rotor and the impeller are fixed on the same shaft, and the canned pump can lubricate and dissipate heat through a conveying medium, so that additional lubricating grease and a cooling fan are not needed. Because of the unique design, the pump shaft dynamic seal structure is cancelled, and the static seal structure is adopted, so that the shielding pump can be completely free of leakage, and environmental pollution and material loss are effectively avoided, and the shielding pump is further suitable for conveying valuable liquid or liquid with pollution. The prior art canned motor pump, such as the utility model patent with publication number CN216554442U announced by the national intellectual property office on 5 months 17 of 2022, the utility model patent with publication number CN222717084U announced by 4 months 4 of 2025, and the utility model patent with publication number CN119687037a announced by 25 months 3 of 2025, basically has the problems that the abrasion of the lubrication part structure is faster, the service life is not expected, and the noise is loud. Disclosure of Invention In order to overcome the defects, the utility model aims to provide a novel shielding pump which is more reasonable in structural layout, can reduce noise and is longer in service life. In order to solve the technical problems, the novel shielding pump comprises a pump cylinder, wherein one end of the pump cylinder is provided with a liquid inlet, the other end of the pump cylinder is provided with a liquid outlet, a rotor shaft is arranged between the liquid inlet and the liquid outlet in the pump cylinder, a bearing seat, a rotor, a connecting seat and an impeller assembly are sequentially arranged on the rotor shaft from one end close to the liquid inlet to the other end close to the liquid outlet, a stator is sleeved on the peripheral surface of the rotor in a clearance manner, bearings are respectively arranged in the bearing seat and the connecting seat, the bearings are sleeved on the rotor shaft, and liquid through holes which are axially arranged are also respectively arranged in the bearing seat and the connecting seat. The inventor has carefully studied the structure and layout of the prior art canned motor pump to solve the technical problems and find out the possible reasons for the technical problems. It is found that in the prior art, since the rotor and the impeller are fixed on the same shaft, the canned motor pump is generally arranged vertically with the axis of the liquid outlet, that is, the driving motor is located at the outer side of the liquid flow path, which is equivalent to being arranged in a T shape, and the inventor analyzes the structural layout to possibly cause some gases brought into the canned motor by unavoidable reasons, and the gases are disturbed by the impeller or the blades, so that a plurality of bubbles formed by the gas fragmentation are mixed and fleed around, and once the bubbles enter the motor or the parts needing lubrication, the adverse effects on the parts can be continuously caused. If the air bubble enters the motor and is positioned in a gap between the stator and the rotor, the rotor is unbalanced by circumferential liquid pressure, the rotor dynamic unbalance phenomenon can occur to generate noise, the bearing for supporting the rotor to rotate can generate eccentric wear phenomenon, if the air bubble enters a part needing lubrication, the rotating shaft can generate dynamic unbalance phenomenon to generate noise, and dry wear phenomenon can occur at the same time of generating eccentric wear phenomenon, so that the lubrication part is damaged too early to shorten the due service life of the shielding pump, the shielding pump with the T-shaped arrangement structure is not beneficial to heat dissipation of the stator and the rotor, and the service life of the shielding pump can be shortened at too high temperature. For the reasons of the analysis, the inventor adopts the countermeasures that the shape of impeller blades is changed, the liquid conveying direction of the impeller is changed from radial to axial, and the liquid inlet, the liquid outlet, the driving shaft and the axis of the impeller of the shielding pump are arranged in a linear manner, so that bad bubbles and heat can be taken away through the pumped liquid flow, the continuous influence of the bad bubbles is eliminated, and the noise of the shielding pump is reduced and the service life of the shielding pump is prolonged. In order to verify the correctness of the countermeasures and mecha