Waterproof sealing structure of miniature direct-current submersible pump

Abstract

The utility model relates to the technical field of submersible pumps, in particular to a waterproof sealing structure of a miniature direct-current submersible pump, which comprises a pump casing, a motor, a fixing seat, a high-temperature-resistant and wear-resistant sleeve, an impeller and high-temperature-resistant waterproof filler, an embedding cavity is arranged on the inner bottom wall of the pump casing, a via hole is arranged on the bottom wall of the embedding cavity, and the high-temperature-resistant and wear-resistant sleeve is provided with a sealing piece. The peripheral side wall of the high-temperature-resistant and wear-resistant sleeve is in close contact with the inner wall of the via hole, the two sides of the sealing piece are in close contact with the bottom wall of the embedding cavity and the bottom face of the fixing base respectively, a shaft passing hole is formed in the middle of the fixing base, the peripheral side wall of the high-temperature-resistant and wear-resistant sleeve is in close contact with the inner wall of the shaft passing hole, and a plurality of sealing lips are arranged on the inner wall of the high-temperature-resistant and wear-resistant sleeve. And the plurality of sealing lips are in close contact with the side wall of the rotating shaft of the motor and define a sealing cavity for accommodating the high-temperature-resistant waterproof filler. Through the arrangement of the high-temperature-resistant wear-resistant sleeve, the sealing piece, the sealing lip and the high-temperature-resistant waterproof filler, the sealing performance is greatly improved, the waterproof effect is good, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to submersible pump technical field especially is a kind of waterproof sealing structure of micro direct-current submersible pump. BACKGROUND

[0002] Submersible pump is the important equipment of deep well water lifting. When using, the whole unit is submerged in water and works, extracts underground water to ground surface, is widely used in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting and ship load adjustment etc., and can also be used for fountain landscape. Submersible pump is mainly driven by motor as driving source, the rotating shaft of motor will be out of pump shell and connected with impeller, how to do a good job in sealing waterproof at the rotating shaft of motor is the core problem of submersible pump. In the existing patent, the Chinese patent document with application number 202222688494.X discloses a multi-stage waterproof submersible pump, including pump shell, shell cover, motor rotor and impeller, motor rotor is placed in pump shell by shell cover sealing cover, shell cover is provided with sealing hole structure, the rotating shaft end of motor rotor passes through sealing hole structure and is out of shell cover and connected with impeller, sealing hole structure includes the through hole on shell cover, the secondary flange that is closed in the upper of through hole and the primary flange that is covered in the outer of secondary flange, secondary flange and primary flange are provided with flange hole coaxially arranged with through hole, oil seal is arranged in through hole, third level sealing is formed by using traditional oil seal sealing technology, oil cavity is formed between secondary flange hole and through hole, and the relationship between water and oil is used to achieve the purpose that water cannot easily enter, to constitute second level sealing;Sealing rubber ring is arranged between primary flange hole and secondary flange hole to realize first level sealing, and the rotating shaft end of motor rotor passes through three-stage sealing hole structure and is connected with impeller. The sealing hole structure of the submersible pump of the patent document is exposed outside pump shell, and the structure is complex, not compact enough, and the volume is large. Therefore, the defect is very obvious, and a solution is urgently needed. UTILITY MODEL CONTENT

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a waterproof sealing structure of micro direct-current submersible pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides a waterproof sealing structure of micro DC submersible pump, which comprises a pump shell, a motor, a fixing base, a high-temperature-resistant and wear-resistant sleeve, an impeller and a high-temperature-resistant waterproof filler, a recessed cavity is formed in the inner bottom wall of the pump shell, a through hole is formed in the bottom wall of the recessed cavity, a sealing sheet is arranged in the middle of the peripheral side wall of the high-temperature-resistant and wear-resistant sleeve, one end of the high-temperature-resistant and wear-resistant sleeve extends into the through hole, the peripheral side wall of the high-temperature-resistant and wear-resistant sleeve is in close contact with the inner wall of the through hole, one side of the sealing sheet is in close contact with the bottom wall of the recessed cavity, the other side of the sealing sheet is in close contact with the bottom surface of the fixing base, the fixing base is embedded in the recessed cavity, a through shaft hole is formed in the middle of the fixing base, the other end of the high-temperature-resistant and wear-resistant sleeve extends into the through shaft hole, the peripheral side wall of the high-temperature-resistant and wear-resistant sleeve is in close contact with the inner wall of the through shaft hole, the motor is arranged in the fixing base and located in the pump shell, the rotating shaft of the motor is fixedly connected with the impeller after penetrating through the high-temperature-resistant and wear-resistant sleeve, a plurality of sealing lips are arranged on the inner wall of the high-temperature-resistant and wear-resistant sleeve, the plurality of sealing lips are distributed along the axis of the rotating shaft of the motor, the plurality of sealing lips are in close contact with the side wall of the rotating shaft of the motor, a sealing cavity is formed between the inner wall of the high-temperature-resistant and wear-resistant sleeve, the peripheral side wall of the rotating shaft of the motor and the adjacent two sealing lips, and the high-temperature-resistant waterproof filler is filled in the sealing cavity.

[0006] Further, a limiting ring is arranged on the top peripheral side of the fixing base, and a ring-shaped limiting groove is recessed in the inner bottom wall of the pump shell and arranged around the top end of the recessed cavity, and the limiting ring is embedded in the ring-shaped limiting groove.

[0007] Further, the high-temperature-resistant waterproof filler is high-temperature-resistant waterproof grease.

[0008] Further, the high-temperature-resistant and wear-resistant sleeve is high-temperature-resistant and wear-resistant oil rubber.

[0009] Further, a waterproof ring is protruded on the bottom end surface of the fixing base and arranged around the through shaft hole, and the end surface of the waterproof ring is in close contact with the sealing sheet.

[0010] Further, a sealing ring is protruded on the edge of the sealing sheet close to the fixing base and in close contact with the bottom surface of the fixing base.

[0011] The utility model discloses an advantageous effect: a miniature direct current submersible pump waterproof seal structure, it includes pump shell, motor, fixed base, high temperature wear -resistant cover, impeller and high temperature waterproof filler, the inner bottom wall of pump shell is recessed and is equipped with the embedded cavity, the bottom wall of embedded cavity is equipped with the via hole, and the peripheral side wall middle part of high temperature wear -resistant cover is equipped with the sealing sheet, and one end of high temperature wear -resistant cover is inserted into the via hole, and the peripheral side wall of high temperature wear -resistant cover is closely contacted with the inner wall of via hole, and one side of sealing sheet is closely contacted with the bottom wall of embedded cavity, and the bottom surface of fixed base is closely contacted with the other side of sealing sheet, and fixed base is embedded in embedded cavity, and the middle part of fixed base is equipped with the via shaft hole, and the other end of high temperature wear -resistant cover is inserted into via shaft hole, and the peripheral side wall of high temperature wear -resistant cover is closely contacted with the inner wall of via shaft hole, and the motor is installed in fixed base and is located in the pump shell, and the shaft of motor is fixedly connected with impeller after penetrating high temperature wear -resistant cover, and the inner wall of high temperature wear -resistant cover is equipped with a plurality of sealing lips, and a plurality of sealing lips are along the axis of the shaft of motor distribution, and a plurality of sealing lips are closely contacted with the side wall of the shaft of motor, and the inner wall of high temperature wear -resistant cover, the peripheral side wall of the shaft of motor and the sealing cavity between adjacent two sealing lips are surrounded, and high temperature waterproof filler is filled in the sealing cavity. The utility model discloses simple structure and compact, small, through the setting of high temperature wear -resistant cover, sealing sheet, sealing lip and high temperature waterproof filler, to form multiple sealing structure, greatly improve the sealing property, and the waterproof effect is good, improves the service life of motor and submersible pump. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the sectional view of the utility model.

[0013] Figure 2 It is Figure 1 It is the enlarged view of A in the middle.

[0014] Figure 3 It is the three-dimensional structure schematic diagram of the utility model.

[0015] BRIEF DESCRIPTION OF DRAWINGS

[0016] 1, pump shell;2, motor;3, fixed base;4, high temperature wear -resistant cover;5, impeller;6, high temperature waterproof filler;7, embedded cavity;8, via hole;9, sealing sheet;10, via shaft hole;11, sealing lip;12, sealing cavity;13, limit ring;14, annular limit slot;15, waterproof ring;16, sealing ring. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the person skilled in the art, the utility model is further explained below in combination with examples and drawings, and the content mentioned in the implementation manner is not the limitation of the utility model.

[0018] As Figures 1 to 3As shown, the utility model provides a kind of waterproof sealing structure of miniature direct current submersible pump, it includes pump shell 1, motor 2, fixed seat 3, high temperature wear-resistant sleeve 4, impeller 5 and high temperature waterproof filler 6, the inner bottom wall of pump shell 1 is recessed with embedded cavity 7, the bottom wall of embedded cavity 7 is provided with via 8, the peripheral side wall middle part of high temperature wear-resistant sleeve 4 is provided with sealing sheet 9, one end of high temperature wear-resistant sleeve 4 is inserted into via 8, and the peripheral side wall of high temperature wear-resistant sleeve 4 is in close contact with the inner wall of via 8, one side of sealing sheet 9 is in close contact with the bottom wall of embedded cavity 7, the other side of sealing sheet 9 is in close contact with the bottom surface of fixed seat 3, and fixed seat 3 is embedded in embedded cavity 7, and the middle part of fixed seat 3 is provided with through shaft hole 10, the other end of high temperature wear-resistant sleeve 4 is inserted into through shaft hole 10, the peripheral side wall of high temperature wear-resistant sleeve 4 is in close contact with the inner wall of through shaft hole 10, motor 2 is installed in fixed seat 3 and is located in pump shell 1, the rotating shaft of motor 2 is fixedly connected with impeller 5 after penetrating high temperature wear-resistant sleeve 4, the inner wall of high temperature wear-resistant sleeve 4 is provided with multiple sealing lips 11, multiple sealing lips 11 are distributed along the axis of the rotating shaft of motor 2, multiple sealing lips 11 are in close contact with the rotating shaft side wall of motor 2, the inner wall of high temperature wear-resistant sleeve 4, the peripheral side wall of the rotating shaft of motor 2 and the adjacent two sealing lips 11 are surrounded to form sealing cavity 12, and high temperature waterproof filler 6 is filled in sealing cavity 12.The utility model's structure is simple and compact, and the volume is small, by the setting of high temperature wear-resistant sleeve 4, sealing sheet 9, sealing lip 11 and high temperature waterproof filler 6, to form multiple sealing structure, greatly improve the sealing property, waterproof effect is good, improve the service life of motor 2 and submersible pump.

[0019] Specifically, the number of sealing lips 11 is three to five.

[0020] In the embodiment, the top peripheral side of fixed seat 3 is provided with a limiting ring 13, and the inner bottom wall of pump shell 1 is recessed with an annular limiting groove 14, which is arranged around the top port of embedded cavity 7. The limiting ring 13 is embedded in the annular limiting groove 14. After assembly, the limiting ring 13 of fixed seat 3 is located in the annular limiting groove 14 to limit fixed seat 3, ensuring the position accuracy and stability of fixed seat 3 installed in pump shell 1. Moreover, the annular limiting groove 14 accommodates the limiting ring 13, making the structure of motor 2, fixed seat 3 and pump shell 1 compact.

[0021] In the embodiment, the high temperature waterproof filler 6 is high temperature waterproof grease. When the rotating shaft of motor 2 rotates, the high temperature waterproof grease not only plays a waterproof role but also plays a lubricating role, further improving the wear resistance of high temperature wear-resistant sleeve 4 and the rotating stability of the rotating shaft of motor 2.

[0022] In the embodiment, the high temperature wear-resistant sleeve 4 is high temperature wear-resistant oil rubber.

[0023] In the embodiment, the bottom end surface of the fixing seat 3 is provided with a waterproof ring 15, the waterproof ring 15 is arranged around the shaft hole 10, and the end surface of the waterproof ring 15 is in close contact with the sealing sheet 9; the edge of the sealing sheet 9 close to one side of the fixing seat 3 is provided with a sealing ring 16, and the sealing ring 16 is in close contact with the bottom surface of the fixing seat 3. The structure design further improves the sealing property between the fixing seat 3 and the sealing sheet 9, and the waterproof effect is better.

[0024] All the technical features in the embodiment can be freely combined according to actual needs.

[0025] The above embodiment is a preferred implementation scheme of the utility model, and the utility model can also be implemented in other manners, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A waterproof sealing structure of a micro DC submersible pump, characterized in that: The utility model relates to a pump, including pump shell (1), motor (2), fixed base (3), high temperature wear -resistant sleeve (4), impeller (5) and high temperature waterproof filler (6), the inner bottom wall of pump shell (1) is recessed and is equipped with the embedded cavity (7), the bottom wall of embedded cavity (7) is equipped with via hole (8), the middle part of high temperature wear -resistant sleeve (4) is provided with sealing sheet (9), one end of high temperature wear -resistant sleeve (4) is inserted into via hole (8), and the peripheral side wall of high temperature wear -resistant sleeve (4) is in close contact with the inner wall of via hole (8), one side of sealing sheet (9) is in close contact with the bottom wall of embedded cavity (7), and the other side of sealing sheet (9) is in close contact with the bottom of fixed base (3), and fixed base (3) is embedded in embedded cavity (7), and the middle part of fixed base (3) is equipped with through shaft hole (10), and the other end of high temperature wear -resistant sleeve (4) is inserted into through shaft hole (10), and the peripheral side wall of high temperature wear -resistant sleeve (4) is in close contact with the inner wall of through shaft hole (10), and motor (2) is installed in fixed base (3) and is located in pump shell (1), and the rotating shaft of motor (2) is fixedly connected with impeller (5) after penetrating high temperature wear -resistant sleeve (4), and the inner wall of high temperature wear -resistant sleeve (4) is provided with a plurality of sealing lips (11), a plurality of sealing lips (11) are distributed along the axis of the rotating shaft of motor (2), a plurality of sealing lips (11) are in close contact with the side wall of the rotating shaft of motor (2), and the inner wall of high temperature wear -resistant sleeve (4), the peripheral side wall of the rotating shaft of motor (2) and the adjacent two sealing lips (11) are surrounded to form sealing cavity (12), and high temperature waterproof filler (6) is filled in sealing cavity (12).

2. The waterproof sealing structure of a micro DC submersible pump according to claim 1, characterized in that: The top peripheral side of fixed base (3) is provided with a limiting ring (13), and the inner bottom wall of pump shell (1) is recessed and is provided with an annular limiting groove (14), the annular limiting groove (14) is arranged around the top port of the embedded cavity (7), and the limiting ring (13) is embedded in the annular limiting groove (14).

3. The waterproof sealing structure of a micro DC submersible pump according to claim 1, characterized in that: The high temperature waterproof filler (6) is a high temperature waterproof grease.

4. The waterproof sealing structure of a micro DC submersible pump according to claim 1, characterized in that: The high temperature wear -resistant sleeve (4) is a high temperature wear -resistant oil rubber.

5. The waterproof sealing structure of a micro DC submersible pump according to claim 1, characterized in that: The bottom end surface of the fixed base (3) is convexly provided with a waterproof ring (15), the waterproof ring (15) is arranged around the through shaft hole (10), and the end surface of the waterproof ring (15) is in close contact with the sealing sheet (9).

6. The waterproof sealing structure of a micro DC submersible pump according to claim 5, characterized in that: The edge of the sealing sheet (9) is convexly provided with a sealing ring (16) on the side close to the fixed base (3), and the sealing ring (16) is in close contact with the bottom surface of the fixed base (3).

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