一种新型屏蔽泵及其屏蔽定子密封结构
By using a split shielding sleeve structure and a rear cover to press against the bearing seat, the problems of complex structure and inconvenient bearing replacement in shielded pumps are solved, achieving convenient sealing and efficient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LEO GRP ZHEJIANG PUMP CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
AI Technical Summary
The existing canned motor pumps have a complex shielding structure, and the welded bearing housing makes installation inconvenient and bearing replacement difficult, affecting maintenance efficiency.
It adopts a split shielding sleeve structure, which achieves sealing by pressing the bearing seat with the rear cover, and uses an O-ring and a front shielding plate for sealing at the front end of the housing, and a sealing ring to cooperate with the bearing seat at the rear end, which simplifies the structure and facilitates disassembly.
It enables convenient bearing replacement and sealing, reduces production difficulty, and improves maintenance efficiency and sealing performance.
Smart Images
Figure CN224520827U_ABST
Abstract
Claims
1. A canned stator seal structure for a new type of canned pump, characterized by: The assembly includes a housing (4), a shielding sleeve (7), a rear shielding ring (15), and a bearing seat (17). The shielding sleeve (7) and the housing (4) form a cavity for the stator (5) to be installed. The rear shielding ring (15) is fixed to the housing (4). The bearing seat (17) axially presses the rear shielding ring (15). An installation groove (25) is formed between the bearing seat (17) and the rear shielding ring (15), and a sealing ring (16) is installed in the installation groove (25). A rear cover (18) is detachably connected to the housing (4). The rear cover (18) presses the bearing seat (17) and squeezes the sealing ring (16).
2. A canned stator seal for a canned pump according to claim 1, wherein: It also includes a front shielding plate (8), which is fixed to the front end of the shielding sleeve (7). The front shielding plate (8) has an annular groove (10) and an O-ring (11) is installed in the annular groove (10).
3. The shielded stator sealing structure of a novel shielded pump according to claim 2, characterized in that: The front end of the housing (4) has a groove (9) adapted to the front shielding plate (8), and the O-ring (11) abuts against the inner wall of the groove (9) of the housing (4).
4. A canned stator seal for a canned pump according to claim 1, wherein: The rear shielding ring (15) has a stepped portion (19) that is adapted to the shielding sleeve (7).
5. A canned stator seal for a canned pump of the type defined in claim 1, characterized in that: The bearing housing (17) has an installation chamber (20) for installing the bearing. The bearing housing (17) has a rear protrusion (21). The rear cover (18) has a groove (22) that mates with the rear protrusion (21).
6. A canned stator seal for a canned pump according to claim 1 or 5, characterized in that: The rear cover (18) is provided with a protruding ring (23) for pressing against the bearing seat (17).
7. A canned stator seal for a canned pump according to claim 5, wherein: An inclined connecting hole (24) is provided on the bearing housing (17). One end of the connecting hole (24) is connected to the installation chamber (20), and the other end penetrates the outer wall of the bearing housing (17). The connecting hole (24) allows the medium to flow into the installation chamber (20).
8. A novel canned motor pump canned stator seal structure according to claim 7, characterized by: The connecting holes (24) are symmetrically arranged.
9. A canned stator seal for a canned pump of the type defined in claim 1, characterized by: The rear cover (18) is fixed to the housing (4) by screws or bolts.
10. A novel canned pump characterized by: The shielded stator sealing structure according to any one of claims 1-9 further includes a pump body (1), the pump body (1) being detachably connected to a housing (4), one end of the housing (4) having a plug-in end (12), and one side of the pump body (1) having a slot (13) for engaging with the plug-in end (12) of the housing (4), a sealing ring (14) being installed in the slot (13), and the plug-in end (12) pressing the sealing ring (14) to achieve sealing.