Sealing structure of submersible pump and submersible pump

Abstract

The utility model provides a sealing structure of a submersible pump and the submersible pump, and belongs to the technical field of submersible pumps. The mechanical seal solves the problem that in the prior art, a mechanical seal of a submersible pump is not reliable in sealing during use. The sealing structure comprises a motor casing, a mechanical seal, a pump body, a pump shaft and a water inlet chamber, the mechanical seal comprises an annular seal body, a plurality of mounting lugs are distributed on the periphery of the annular seal body, a center sleeve seat is formed in the middle of the annular seal body and extends upwards to form a center sleeve column, and a through shaft hole is formed in the center sleeve column. An upper sealing ring and a lower sealing ring are formed at the upper end and the lower end of the annular sealing body respectively, sealing grooves are formed in the upper sealing ring and the lower sealing ring respectively, sealing rings are fixedly installed in the sealing grooves, a large through hole is formed in the center of the annular sealing body, a positioning convex body is formed in the large through hole, and fixing feet are formed at the two ends of the positioning convex body. And first sealing gaskets are fixedly mounted outside the positioning convex bodies and the positioning feet. The mechanical sealing structure has the advantages of being high in strength and good in sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to submersible pump technical field relates to a sealing structure and submersible pump of submersible pump. BACKGROUND

[0002] As the core equipment of liquid delivery, submersible pumps are widely used in water conservancy projects, industrial drainage, municipal sewage and other fields. Among them, the mechanical seal structure is the key component to ensure the normal operation of the submersible pump, and its performance directly affects the reliability and service life of the equipment.

[0003] The Chinese patent with patent publication number CN207701394U discloses a submersible pump, which comprises a pump body, a motor arranged in the pump body, a booster impeller connected to the bottom end of the motor through a rotating shaft, a bearing arranged outside the rotating shaft, a mechanical seal sleeve arranged at the position below the bearing close to the rotating shaft, an oil chamber arranged on one side of the mechanical seal sleeve, guide vanes arranged on the outer wall of the booster impeller, fixed plates arranged at both ends of the booster impeller, a flow guide impeller arranged at the bottom end of the booster impeller, a fixed blade arranged below the flow guide impeller, a saw-shaped cutting edge connected to the bottom end of the fixed blade, a rotary blade arranged at the position on the side away from the fixed blade of the saw-shaped cutting edge, a water inlet arranged at the bottom end of the pump body, a water outlet arranged on one side of the pump body, a connecting flange connected to the top end of the water outlet, a sealing ring arranged at the intermediate position between the water outlet and the connecting flange, a base arranged at the bottom of the pump body, and a damping spring installed at the intermediate position between the base and the pump body.

[0004] In the submersible pump provided by the patent, the mechanical seal, the rotating shaft and the oil chamber are only connected through a sleeving structure. The vibration and axial force during the operation of the submersible pump may cause the mechanical seal to loosen and displace, thereby reducing the sealing reliability. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above-mentioned problems existing in the prior art, and provides a sealing structure and a submersible pump.

[0006] The utility model discloses a sealing structure and submersible pump of submersible pump, including motor shell, mechanical seal, pump body, pump shaft and water inlet chamber, the mechanical seal includes annular sealing main part, the annular sealing main part periphery is distributed with a plurality of mounting ear parts, the annular sealing main part middle part forms the center sleeve seat, the center sleeve seat extends upwards and forms the center sleeve column, the center sleeve column is seted up with the axle hole that penetrates, the upper and lower ends of annular sealing main part form upper sealing ring and lower sealing ring respectively, the upper sealing ring stretches into the motor shell inside, the upper sealing ring and lower sealing ring all are seted up with sealing groove, the sealing groove is fixedly installed with sealing ring, the center of annular sealing main part is seted up with big through -hole, and the big through -hole forms the location convex in the inside, the location convex both ends form fixed foot, the location convex and location foot outside fixed mounting have first sealing gasket, the upper end of pump body inside forms the sealing surface, and the lower sealing ring and annular sealing main part stretch into the pump body inside.

[0007] In the sealing structure and submersible pump of submersible pump, the upper end of the center sleeve seat forms two bolt seats, the bolt seats are fixed with the outer end surface of the center sleeve column, and the center sleeve column is provided with a sealing bearing and a sealing support in the inside.

[0008] In the sealing structure and submersible pump of submersible pump, the upper end of the center sleeve column is fixedly installed with a second sealing gasket.

[0009] In the sealing structure and submersible pump of submersible pump, the fixed foot is arranged in a vertical direction with the bolt seat, and the first sealing gasket and the second sealing gasket are also arranged in a vertical direction.

[0010] Compared with the prior art, the sealing structure and submersible pump of submersible pump have the following beneficial effects: 1. The upper sealing ring and the lower sealing ring at the upper and lower ends of the annular sealing main body are provided with sealing grooves and sealing rings, forming a double-layer sealing barrier, which can seal the connection between the motor shell and the pump body, effectively preventing liquid from leaking into the motor shell or the pump body, the center sleeve column is provided with a sealing bearing and a sealing support inside, which can seal the shaft hole channel through which the pump shaft passes, prevent liquid from leaking along the shaft hole gap, and strengthen the sealing performance of the rotating part of the shaft system; 2. The first sealing gasket outside the location convex and the fixed foot fills the gap in the center big through-hole area of the annular sealing main body, prevents liquid from penetrating from the location structure, and the second sealing gasket at the upper end of the center sleeve column further blocks the gap at the top end of the shaft hole channel, cooperates with the sealing bearing and the sealing support to form a three-dimensional sealing protection at the shaft hole. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the explosion structure schematic diagram of the utility model;

[0012] Figure 2 is a schematic diagram of the explosion-proof structure of the mechanical seal;

[0013] Figure 3 is Figure 2 a schematic diagram of another angle structure.

[0014] In the figure: 1, motor shell; 2, mechanical seal; 21, annular sealing body; 211, mounting lug; 212, large through hole; 213, positioning convex body; 214, fixing foot; 22, center sleeve seat; 23, center sleeve column; 231, shaft hole; 232, bolt seat; 24, upper sealing ring; 25, lower sealing ring; 26, sealing groove; 27, sealing ring; 28, sealing bearing; 29, sealing support; 3, pump body; 31, sealing surface; 4, pump shaft; 5, water inlet chamber; 6, first sealing gasket; 7, second sealing gasket. DETAILED DESCRIPTION

[0015] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0016] As Figure 1 shown, the present embodiment includes a motor shell 1, a mechanical seal 2, a pump body 3, a pump shaft 4, and a water inlet chamber 5, the motor shell 1, the mechanical seal 2, the pump body 3, and the water inlet chamber 5 are sequentially fixedly connected, and the pump shaft 4 sequentially passes through the motor shell 1, the mechanical seal 2, the pump body 3, the pump shaft 4, and the water inlet chamber 5.

[0017] As Figures 2 to 3 shown, the mechanical seal 2 includes an annular sealing body 21, the annular sealing body 21 has a plurality of mounting lugs 211 distributed on the outer periphery, a center sleeve seat 22 is formed in the middle of the annular sealing body 21, the center sleeve seat 22 extends upward to form a center sleeve column 23, two symmetrical bolt seats 232 are welded and fixed to the upper end of the center sleeve seat 22, i.e., the outer end of the center sleeve column 23, a second sealing gasket 7 is installed on the upper end of the center sleeve column 23 and is fixed to the mechanical seal 2 through the bolt seats 232 and bolts, a through shaft hole 231 is formed in the mechanical seal 2, an upper sealing ring 24 and a lower sealing ring 25 are respectively formed at the upper and lower ends of the annular sealing body 21, sealing grooves 26 are formed in the upper sealing ring 24 and the lower sealing ring 25, sealing rings 27 are fixedly installed in the sealing grooves 26, a large through hole 212 is formed in the center of the annular sealing body 21, a positioning convex body 213 is formed in the large through hole 212, fixing feet 214 are formed at the two ends of the positioning convex body 213, and a first sealing gasket 6 is attached to the outer side of the positioning convex body 213 and is fixed to the mechanical seal 2 through the fixing feet 214 and bolts.

[0018] As Figures 1 to 3As shown, when the mechanical seal 2 is mounted and connected with the motor shell 1 and the pump body 3, the upper sealing ring 24 extends into the interior of the motor shell 1, the sealing ring 27 in the upper sealing ring 24 ensures the sealing between the mechanical seal 2 and the motor shell 1, the sealing surface 31 is formed at the upper end of the interior of the pump body 3, the lower sealing ring 25 and the annular sealing body 21 extend into the interior of the pump body 3, the lower end of the lower sealing ring 25 is attached to the upper end of the sealing surface 31, and the sealing ring 27 in the lower sealing ring 25 ensures the sealing between the mechanical seal 2 and the pump body 3.

[0019] Further in detail, as shown, Figures 2 to 3 As shown, the fixed foot 214 is arranged in a vertical direction with the bolt seat 232, and the first sealing gasket 6 and the second sealing gasket 7 are also arranged in a vertical direction, the vertical arrangement disperses the force, the axial force generated by the bolt seat 232 through the bolt fixation is perpendicular to the radial force formed by the fixed foot 214 positioning, and the stability of the overall structure of the mechanical seal 2 is enhanced.

[0020] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0021] Although various terms are used frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A sealing structure for a submersible pump and the submersible pump, comprising a motor housing (1), a mechanical seal (2), a pump body (3), a pump shaft (4), and an inlet chamber (5), characterized in that: The mechanical seal (2) includes an annular sealing body (21), with several mounting ears (211) distributed around its outer periphery. A central sleeve (22) is formed in the middle of the annular sealing body (21), and the central sleeve (22) extends upward to form a central sleeve column (23). A through shaft hole (231) is provided in the central sleeve column (23). An upper sealing ring (24) and a lower sealing ring (25) are formed at the upper and lower ends of the annular sealing body (21), respectively. The upper sealing ring (24) extends into the motor housing (1). (25) is provided with a sealing groove (26), and a sealing ring (27) is fixedly installed in the sealing groove (26). A large through hole (212) is provided at the center of the annular sealing body (21). A positioning protrusion (213) is formed inside the large through hole (212). Fixed feet (214) are formed at both ends of the positioning protrusion (213). A first sealing gasket (6) is fixedly installed outside the positioning protrusion (213) and the positioning feet. A sealing surface (31) is formed at the upper end of the pump body (3). The lower sealing ring (25) and the annular sealing body (21) extend into the pump body (3).

2. The sealing structure and submersible pump according to claim 1, characterized in that: The upper end of the central sleeve (22) has two bolt seats (232), which are fixed to the outer end face of the central sleeve (23). The central sleeve (23) is provided with a sealed bearing (28) and a sealed support (29).

3. The sealing structure and submersible pump according to claim 1, characterized in that: A second sealing gasket (7) is fixedly installed on the upper end of the central sleeve (23).

4. The sealing structure and submersible pump according to claim 2 or 3, characterized in that: The fixing foot (214) is arranged perpendicularly to the bolt seat (232), and the first sealing gasket (6) and the second sealing gasket (7) are also arranged perpendicularly.

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