RB cover structure of shielding electric pump
By incorporating a circulating fluid inlet, vent, and connection channel into the RB cover structure of the canned electric pump, the problems of poor cooling and lubrication caused by gas entering the motor cavity in the medium are solved, enabling automatic gas discharge and reducing the risk of damage and manufacturing costs.
Patent Information
- Application Number
- CN202520613835.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-02
AI Technical Summary
When the medium in an existing canned motor pump contains a large amount of gas, the gas can enter the motor cavity, leading to poor cooling and bearing lubrication, which may damage the motor and bearings. Existing solutions rely on manual venting valves, which increases the complexity and cost of gas handling.
The RB cover structure is equipped with a circulating liquid inlet, an exhaust port, and an interface, which are connected through a connecting channel. The gas is naturally discharged by the flow of the medium, simplifying the process so that no additional tailpipe or exhaust valve is needed, thus reducing manufacturing and labor costs.
It enables automatic discharge of gas from the medium, reduces the risk of damage to motors and bearings, simplifies the gas handling process, and reduces manufacturing and labor costs.
Smart Images
Figure CN223908482U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric pump, specifically relates to a RB cover structure of shielded electric pump. BACKGROUND
[0002] The structure of conventional external circulation shielded electric pump is shown in the figure, medium enters the pump cavity from the pump inlet, and flows to the pump outlet under the action of the impeller. Figure 1 Part of the medium will flow through the rear bearing, the front bearing and then return to the pump outlet through the circulation pipe, and the function of this part of the medium is to cool the motor and lubricate the bearing.
[0003] Since the circulation structure is simple and the motor needs to be cooled and the bearing needs to be lubricated, only a small amount of gas or no gas is allowed to be contained in the medium, if the gas content in the medium is relatively high, the gas will enter the motor cavity along the circulation pipe with the medium, resulting in poor motor cooling and poor bearing lubrication, and the motor and the bearing may be damaged.
[0004] The existing conventional gas treatment method is to increase a manual exhaust valve on the RB cover side, and the excessive gas in the pump is discharged when the pump is started, so as to improve the service life of the shielded electric pump. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the above-mentioned insufficient problems, and provides a RB cover structure of shielded electric pump.
[0006] The utility model adopts the technical scheme that:
[0007] A RB cover structure of shielded electric pump, comprising an RB cover, a circulation liquid inlet and an exhaust hole are formed in one end of the RB cover and communicate with the motor cavity of the shielded electric pump, the exhaust hole is located above the circulation liquid inlet, an interface that communicates with the circulation pipe is formed in the other end of the RB cover, the exhaust hole horizontally corresponds to the interface, a connecting channel is formed in the RB cover, and the circulation liquid inlet, the exhaust hole and the interface are communicated through the connecting channel.
[0008] The RB cover comprises an RB cover main body and an RB cover cover plate, the circulation liquid inlet and the exhaust hole are formed in one end of the RB cover main body, a groove is formed in the other end of the RB cover main body, the interface is formed on the RB cover cover plate, the RB cover cover plate is covered on the groove of the RB cover main body, the groove of the RB cover main body and the end surface of the RB cover cover plate form the connecting channel, and the circulation liquid inlet, the exhaust hole and the interface are communicated with the groove.
[0009] The RB cover cover plate is welded on the end surface of the RB cover main body.
[0010] The interface is provided with a loose joint, and the loose joint is communicated with the circulation pipe.
[0011] The utility model discloses a feature is: compact structure, simple use material, simple manufacturing, not easy to damage, can reduce the risk of damage in the transportation process, wide application range, less procedure, set up connecting channel 7 in the RB cover and connect circulation liquid import, exhaust hole, circulation pipe, thereby realize through the existing circulation pipe structure, can effectively discharge the gas in the shielded electric pump motor cavity, do not need to install additional tail pipe or exhaust valve, do not need artificial intervention, reduce the manufacturing cost, reduce the manpower cost. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the structure schematic diagram of the prior art external circulation shielded electric pump.
[0013] Figure 2 It is the RB cover structure schematic diagram of the first embodiment of the utility model.
[0014] Figure 3 It is the RB cover structure schematic diagram of the second embodiment of the utility model.
[0015] Figure 4 It is the recess structure schematic diagram of the second embodiment.
[0016] Among them: 1, RB cover 11, RB cover main body 12, RB cover cover plate 2, circulation liquid import 3, exhaust hole 4, interface 5, circulation pipe 6, loose joint 7, connecting channel 8, shielded electric pump. DETAILED DESCRIPTION First embodiment
[0017] As Figure 2 Shown, the utility model discloses a kind of RB cover structures of shielded electric pump, including RB cover 1, the RB cover 1 is integral, the RB cover 1 one end is equipped with with the circulation liquid import 2 of motor cavity communication of shielded electric pump 8, exhaust hole 3, the exhaust hole 3 is located in the upper of circulation liquid import 2 and corresponds with the inner wall of the stator assembly of shielded electric pump 8, the RB cover 1 other end is equipped with the interface 4 of circulation pipe 5 communication, the exhaust hole 3 and interface 4 horizontal correspondence, facilitate gas to be discharged smoothly, the interface 4 is equipped with loose joint 6, by loose joint 6, it is convenient to be communicated with circulation pipe 5, the RB cover 1 is equipped with connecting channel 7, the circulation liquid import 2, exhaust hole 3, interface 4 are communicated by connecting channel 7. Second embodiment
[0018] As Figure 3 , 4As shown, the RB cover 1 in example one is made as a split body to facilitate processing, the RB cover 1 comprises an RB cover body 11 and an RB cover cover plate 12, the circulating liquid inlet 2 and the exhaust hole 3 are arranged at one end of the RB cover body 11, a groove 71 is arranged at the other end of the RB cover body 11, the interface 4 is arranged on the RB cover cover plate 12, the RB cover cover plate 12 is covered on the groove 71 of the RB cover body 11 and is welded on the end face of the RB cover body 11, the groove 71 of the RB cover body 11 and the end face of the RB cover cover plate 12 form a connecting channel 7, and the circulating liquid inlet 2, the exhaust hole 3 and the interface 4 are in communication with the groove 71.
[0019] During the working of the above-mentioned example one and example two, the electric pump needs to be started according to the use requirements of the shielded electric pump 8, the shielded electric pump 8 is started for 0.5s without stopping, the medium enters the pump cavity from the pump inlet, flows to the pump outlet under the action of the impeller, part of the medium enters the motor cavity of the shielded electric pump 9 through the interface 4, the connecting channel 7 and the circulating liquid inlet 2, and then returns to the pump outlet, the gas in the shielded electric pump 8 motor cavity enters the inner wall of the stator assembly, then reenters the circulating pipe 5 through the exhaust hole 3, the connecting channel 7 and the interface 4, and is discharged from the pump outlet, when all the gas is discharged, the pump is started normally, and the medium enters the RB cover 1 from the circulating pipe 5 to better lubricate the bearing.
[0020] The RB cover 1 of the utility model has the advantages of compact structure, simple use material, simple manufacturing, difficulty in damage, reduced risk of damage in the transportation process, wide application range, few processes, the connecting channel 7 is arranged in the RB cover 1 to connect the circulating liquid inlet 2, the exhaust hole 3 and the circulating pipe 5, so that the gas in the motor cavity of the shielded electric pump 8 can be effectively discharged through the existing circulating pipe 5 structure, without the need of installing an additional tail pipe or exhaust valve, without human intervention, reduced manufacturing cost and labor cost.
[0021] The above-mentioned is only the preferable specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field according to the technical scheme and the inventive concept of the utility model can make equivalent replacement or change within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. An RB cover structure for shielding an electric pump, characterized by: The RB cover comprises a circulating liquid inlet and an exhaust hole which are arranged at one end of the RB cover and communicate with the shielding electric pump motor cavity, an interface which is arranged at the other end of the RB cover and communicates with the circulating pipe, and a connecting channel which is arranged in the RB cover and connects the circulating liquid inlet, the exhaust hole and the interface.
2. The RB cover structure of claim 1, wherein: The RB cover comprises an RB cover body and an RB cover cover plate, the circulating liquid inlet and the exhaust hole are arranged at one end of the RB cover body, a groove is arranged at the other end of the RB cover body, the interface is arranged on the RB cover cover plate, the RB cover cover plate is covered on the groove of the RB cover body, the groove of the RB cover body and the end surface of the RB cover cover plate form the connecting channel, and the circulating liquid inlet, the exhaust hole and the interface are communicated with the groove.
3. The RB cover structure shielding an electric pump according to claim 2, characterized by: The RB cover cover plate is welded on the end surface of the RB cover body.
4. The RB cover structure shielding an electric pump according to claim 1, characterized by: The interface is provided with a loose joint, and the circulating pipe is communicated with the interface through the loose joint.