Submersible pump sealing device

Abstract

The invention relates to the technical field of submersible pumps, and discloses a submersible pump sealing device which comprises a main body, and the output end of the main body is fixedly connected with a pump shaft. And the sealing mechanism is connected to the outer surface of the pump shaft in a sliding manner and is used for sealing the pump shaft and the main body. When the opening and closing ring is closed to extrude the convex ring on the static ring, the condition that relative displacement is generated between the sealed static ring and the spring seat when the pump shaft vibrates and shakes can be reduced; the condition that the sealing stability of the contact surface between the static ring and the spring seat is influenced by the displacement of the contact surface between the spring seat and the static ring when the pump shaft shakes is reduced, and the sealing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of submersible pumps, and specifically to a sealing device for a submersible pump. Background Art

[0002] A submersible pump is an important device widely used in fields such as agricultural irrigation, urban drainage, industrial water supply and drainage, mine rescue, and sewage treatment. It usually needs to work underwater to lift water from a lower place to a higher place or transport it to a designated location. Due to the special nature of its working environment, the sealing performance of the submersible pump is crucial, directly related to the service life, operating efficiency of the pump, as well as the safety and reliability of the entire system; When a submersible pump is sealed, generally a static ring is installed between the pump shaft and the pump body, and a dynamic ring with a spring is installed in the dark part of the static ring. The extrusion of the dynamic ring against the static ring is used to achieve the sealing effect. Since the pump shaft is prone to shaking during long-term operation when it is affected by uneven fluid flow rates or when foreign objects are adsorbed during operation, it is easy to cause the sealing elements in the device to displace due to the unbalanced axial force of the pump shaft, resulting in displacement of the contact surface between the dynamic ring and the static ring due to the shaking of the pump shaft. This not only affects the stability of the contact surface of the sealing device in the device during sealing but also affects the sealing efficiency during operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a sealing device for a submersible pump to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention is a sealing device for a submersible pump, including a main body. The output end of the main body is fixedly connected to a pump shaft, and further includes; A sealing mechanism, which is slidably connected to the outer surface of the pump shaft and is used to seal between the pump shaft and the main body; An auxiliary mechanism, which slides inside the sealing mechanism and is used to enhance the sealing of the sealing mechanism to the main body when the pump shaft shakes; Among them, when the pump shaft shakes during operation, the sealing mechanism will seal between the main body and the pump shaft. When the pump shaft shakes, the auxiliary mechanism inside the sealing mechanism will strengthen the sealing between the sealing mechanism and the main body as the sealing mechanism shakes with the pump shaft.

[0005] Furthermore, the main body includes: A transmission component, which is threadedly installed on the side wall of the main body and is used to install the sealing mechanism inside it after the main body is assembled; Among them, when in use, after the transmission component is assembled with the main body and the sealing mechanism is installed in the transmission component, the main body is sealed.

[0006] Further, the sealing mechanism includes an extrusion spring slidably disposed on the outer surface of the pump shaft. The sealing mechanism includes: An extrusion assembly, which is slidably disposed on the outer surface of the pump shaft through a fixing member; A sliding assembly, which is slidably disposed inside the extrusion assembly; and A pushing assembly, which is slidably disposed inside the extrusion assembly.

[0007] Further, the auxiliary mechanism includes two opening and closing rings slidably disposed on the left and right sides of the extrusion spring. The auxiliary mechanism includes: An opening and closing assembly, which is slidably disposed inside the opening and closing ring; A rolling assembly, which is rotatably disposed inside the opening and closing assembly; and A moving assembly, which is slidably disposed inside the opening and closing assembly.

[0008] Further, the transmission assembly includes a sealing shell threadedly connected to the right side of the main body. One end of the sealing shell away from the main body is threadedly connected with a top cover; The fixing member includes spring seats fixedly connected to the left and right sides of the pump shaft. A static ring is provided at one end of the spring seat away from the extrusion spring. The two static rings are slidably connected to the outer surface of the pump shaft. A convex ring is fixedly connected to one end of the static ring close to the spring seat; The extrusion assembly includes an oil groove opened on the side of the spring seat away from the extrusion spring. A plurality of oil pipe grooves are opened inside the spring seat. The plurality of oil pipe grooves are circumferentially arranged around the extrusion spring. A plurality of limiting grooves are opened inside the spring seat. The plurality of limiting grooves are circumferentially arranged around the extrusion spring; Wherein, the limiting groove is communicated with the inside of the oil groove through the oil pipe groove.

[0009] Further, the sliding assembly includes a plurality of auxiliary springs fixedly connected to the inner wall of the oil groove close to the extrusion spring. One end of the plurality of auxiliary springs away from the extrusion spring is fixedly connected with a C-shaped ring. One end of the C-shaped ring away from the auxiliary spring is fixedly connected with a triangular ring; The pushing assembly includes a spring rod slidably connected inside the limiting groove. One side of the spring rod close to the middle of the spring seat penetrates through the side wall of the limiting groove and extends into the inside of the oil groove. A second return spring is fixedly connected to the side wall of the spring rod located inside the limiting groove. One end of the second return spring close to the middle of the spring seat is fixedly connected with the inside of the limiting groove. The extended end of the spring rod is fixedly connected with a right-angle block.

[0010] Further, the opening and closing assembly includes an annular groove opened on the side wall of the opening and closing ring. A tension spring is fixedly connected between the two opening and closing rings. A plurality of circular grooves are opened on the side of the opening and closing ring close to the main body; Two of the opening and closing rings are rotatably connected, and the two opening and closing rings are slidably connected to the side wall of the spring seat away from the compression spring.

[0011] Further, a rolling component, the rolling component includes a plurality of balls rotatably connected inside the annular groove, the plurality of balls are circumferentially arrayed with the pump shaft as the center, and a sealing ring is arranged on the outer surface of the plurality of balls, and the middle part of the sealing ring is fixedly connected to the outer surfaces of the two opening and closing rings.

[0012] Further, a moving component, the moving component includes a semi-circular rod slidably connected to the outer surfaces of a plurality of balls located inside the annular groove, a flexible layer is fixedly connected to one end of the semi-circular rod away from the compression spring, and one end of the flexible layer away from the semi-circular rod slides through the side wall of the opening and closing ring and extends to the outside, and a plurality of return springs are fixedly connected to one end of the semi-circular rod close to the flexible layer.

[0013] Further, one ends of the plurality of return springs away from the semi-circular rod are fixedly connected to the inner wall of the annular groove; Among them, when the pump shaft shakes during operation, the closing of the opening and closing component can reduce the shaking situation when the pump shaft shakes.

[0014] The present invention has the following beneficial effects: 1. In the present invention, when the compression spring is compressed after the installation of the top cover, the elastic force during the compression of the compression spring will push the spring seat to drive the C-shaped ring to squeeze the static ring. When the static ring is squeezed by the C-shaped ring, the convex ring on the static ring will squeeze the C-shaped ring and make it slide inside the oil tank, so that the oil in the oil tank enters the inside of the limit groove through the oil pipe groove. When the pump shaft shakes during operation, the shaking of the pump shaft will drive the spring seat to shake synchronously. When the spring seat shakes, it will drive the internal C-shaped ring to slide on the surface of the convex ring on the static ring. When the C-shaped ring slides on the surface of the convex ring, the convex ring on the static ring will squeeze the triangular plate inside the C-shaped ring to make the C-shaped ring slide inside the oil tank. When the C-shaped ring slides inside the oil tank, it will squeeze the oil inside the oil tank to make it flow in the oil pipe groove and push the spring rod to drive the right-angle block to slide outwards. When a plurality of spring rods drive the right-angle block to slide, it will squeeze the outer walls of the two opening and closing rings. When the outer walls of the two opening and closing rings are pushed by a plurality of right-angle blocks, the two opening and closing rings will close. When the two opening and closing rings are squeezed and closed, they will wrap and squeeze the convex ring on the static ring inside the spring seat. When the closing of the opening and closing ring squeezes the convex ring on the static ring, it can reduce the relative displacement between the sealed static ring and the spring seat when the pump shaft vibrates and shakes, and reduce the situation that the displacement of the contact surface between the spring seat and the static ring affects the sealing stability of the contact surface between the static ring and the spring seat when the pump shaft shakes, and improve the sealing efficiency.

[0015] 2. According to the present invention, when multiple spring rods drive the right-angle blocks to squeeze and push the two opening and closing rings, the sliding of the right-angle blocks will slide into the inside of the annular groove when pushing the opening and closing rings, and then when the spring rods drive the right-angle blocks to push the opening and closing rings to slide inside the annular groove, the sliding of the right-angle blocks in the annular groove will squeeze the side walls of the balls, and when the multiple balls are squeezed by the right-angle blocks, they will drive the semicircular rods to slide downward, and when the multiple balls slide downward, they will pass through the circular groove and the side walls of the static ring to be squeezed, and at the same time, when the multiple balls drive the semicircular rods to slide downward, the downward sliding of the semicircular rods will drive the flexible layer to slide downward, and since the flexible layer is inclined at the bottom of the semicircular rods, when the semicircular rods drive the flexible layer to slide downward, it will squeeze the side walls of the static ring and slide outward to extend, and when the two opening and closing rings are opened, the right-angle blocks will slide downward, and the side walls of the static ring will be squeezed and extended outward. When the multiple balls at the bottom of the ring drive the semicircular rod and the flexible layer to slide downward, the flexible layer can slide outward and extend. When the C-shaped ring shakes on the side wall of the static ring as the pump shaft, the flexible layer can slide outward and extend to fill in the space between the spring seat and the static ring as the spring seat shakes with the pump shaft, thereby reducing the warping and gap between the spring seat and the static ring caused by the swing of the spring seat after the opening and closing ring is extruded and covered with the raised ring on the static ring. It also reduces the entry of external dust and impurities into the contact surface due to the warping or gap between the spring seat and the static ring caused by the swing of the pump shaft, and at the same time reduces the decrease in sealing when a gap is formed due to the swing of the spring seat, thereby further reducing the gap when the device is sealed during operation, thereby improving the sealing efficiency.

[0016] 3. According to the present invention, when the right-angle block squeezes the opening and closing ring and slides to the inside of the annular groove, when the right-angle block slides and pushes the semicircular rod to slide downward, the inclined part behind the right-angle block squeezes the top of the sealing ring to deform it and then flips downward on the outer surface of the opening and closing ring. When the sealing ring flips downward on the surface of the opening and closing ring with its middle part, it squeezes downward on the top of the flexible layer that slides and extends outward, so that when the flexible layer slides and extends outward, the squeezing of the sealing ring can further enhance the tightness of the contact surface between the flexible layer and the static ring, and reduce the situation that the ball causes the flexible layer to extend outward to vibrate or shake when the ball rotates with the sliding of the right-angle block, so as to reduce the situation that the contact tightness between the flexible layer and the static ring is unstable due to the rotation of the ball when the flexible layer extends outward, so as to further enhance the tightness of the contact between the flexible layer and the static ring when the flexible layer extends outward, so as to further reduce the situation that the spring seat has a gap when the transmission assembly shakes, so as to enhance the sealing of the flexible layer tightly squeezing the static ring when it extends outward, and enhance the sealing efficiency.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the partial sectional structure of the overall of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram at A in; Figure 4 Exploded view of the main body of the present invention; Figure 5 Schematic diagram of the extrusion assembly of the present invention; Figure 6 Schematic diagram of the sliding assembly of the present invention; Figure 7 For the present invention Figure 5 Enlarged view at B in; Figure 8 Schematic diagram of the rolling assembly of the present invention; Figure 9 Schematic diagram of the moving assembly of the present invention; Figure 10 Schematic diagram of the C-ring structure of the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows: In the figure: 1, main body; 11, transmission assembly; 111, pump shaft; 112, sealing shell; 113, top cover; 2, sealing mechanism; 21, extrusion assembly; 211, extrusion spring; 212, spring seat; 213, stationary ring; 214, oil tank; 215, oil pipe groove; 216, limit groove; 22, sliding assembly; 221, C-ring; 222, auxiliary spring; 23, pushing assembly; 231, spring rod; 232, right-angle block; 3, auxiliary mechanism; 31, opening and closing assembly; 311, opening and closing ring; 312, annular groove; 313, tension spring; 314, circular groove; 32, rolling assembly; 321, ball; 322, sealing ring; 33, moving assembly; 331, semi-circular rod; 332, flexible layer; 333, return spring. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1 - Figure 10 As shown, the present invention is a submersible pump sealing device, including a main body 1. The output end of the main body 1 is fixedly connected with a pump shaft 111, and further includes; A sealing mechanism 2, which is slidably connected to the outer surface of the pump shaft 111 and is used to seal between the pump shaft 111 and the main body 1; An auxiliary mechanism 3, which slides inside the sealing mechanism 2 and is used to enhance the sealing of the sealing mechanism 2 to the main body 1 when the pump shaft 111 shakes; Among them, when the pump shaft 111 works, it will seal between the main body 1 and the pump shaft 111 through the sealing mechanism 2. When the pump shaft 111 shakes, the auxiliary mechanism 3 inside the sealing mechanism 2 will strengthen the sealing between the sealing mechanism 2 and the main body 1 when the sealing mechanism 2 shakes along with the pump shaft 111.

[0023] The main body 1 includes: A transmission component 11, which is threadedly installed on the side wall of the main body 1 and is used to install the sealing mechanism 2 inside it after assembling the main body 1; Among them, when in use, after assembling the transmission component 11 and the main body 1 and installing the sealing mechanism 2 into the transmission component 11, the main body 1 is sealed.

[0024] The sealing mechanism 2 includes a compression spring 211 slidably arranged on the outer surface of the pump shaft 111. The sealing mechanism 2 includes: A compression component 21, which is slidably arranged on the outer surface of the pump shaft 111 through a fixing part; A sliding component 22, which is slidably arranged inside the compression component 21; and A pushing component 23, which is slidably arranged inside the compression component 21. When the pump shaft 111 shakes, the sliding component inside the compression component 21 will push the hydraulic oil inside the compression component 21 and push the pushing component 23, thereby reducing the shaking of the compression component 21 along with the pump shaft 111.

[0025] The auxiliary mechanism 3 includes two opening and closing rings 311 slidably arranged on the left and right sides of the compression spring 211. The auxiliary mechanism 3 includes: An opening and closing component 31, which is slidably arranged inside the opening and closing ring 311; A rolling component 32, the rolling component 32 is rotatably arranged inside the opening and closing component 31; and A moving component 33, the moving component 33 is slidably arranged inside the opening and closing component 31. Through the movement of the opening and closing component 31, it can reduce the shaking of the extrusion component 21 along with the pump shaft 111 while further enhancing the sealing performance between the extrusion component 21 and the pump shaft 111 and the main body 1.

[0026] A transmission component 11, the transmission component 11 includes a sealing shell 112 threadedly connected to the right side of the main body 1. One end of the sealing shell 112 away from the main body 1 is threadedly connected with a top cover 113. First, connect the sealing shell 112 to the main body 1 through bolts. Then, slide the static ring 213 at the bottom onto the bottom inner wall of the pump shaft 111 and the sealing shell 112 through the pump shaft 111 and fit it into the inside of the sealing shell 112. Subsequently, fit another static ring 213 into the side of the top cover 113 close to the main body 1.

[0027] A fixing part, the fixing part includes spring seats 212 fixedly connected to the left and right sides of the pump shaft 111. One end of the spring seat 212 away from the extrusion spring 211 is provided with a static ring 213. The two static rings 213 are slidably connected to the outer surface of the pump shaft 111. One end of the static ring 213 close to the spring seat 212 is fixedly connected with a convex ring; An extrusion component 21, the extrusion component 21 includes an oil groove 214 opened on the side of the spring seat 212 away from the extrusion spring 211. A plurality of oil pipe grooves 215 are opened inside the spring seat 212. The plurality of oil pipe grooves 215 are arranged in a circumferential array centered on the extrusion spring 211. A plurality of limiting grooves 216 are opened inside the spring seat 212. The plurality of limiting grooves 216 are arranged in a circumferential array centered on the extrusion spring 211; Wherein, the limiting groove 216 is communicated with the inside of the oil groove 214 through the oil pipe groove 215. When the extrusion spring 211 is compressed after the installation of the top cover 113, the elastic force during the compression of the extrusion spring 211 will push the spring seat 212 to drive the C-shaped ring 221 to extrude the static ring 213. When the static ring 213 is extruded by the C-shaped ring 221, the convex ring on the static ring 213 will extrude the C-shaped ring 221 and make it slide inside the oil groove 214.

[0028] A sliding component 22, the sliding component 22 includes a plurality of auxiliary springs 222 fixedly connected to the inner wall of the oil groove 214 close to the extrusion spring 211. One end of the plurality of auxiliary springs 222 away from the extrusion spring 211 is fixedly connected with a C-shaped ring 221. One end of the C-shaped ring 221 away from the auxiliary springs 222 is fixedly connected with a triangular ring; The pushing component 23 includes a spring rod 231 slidably connected inside the limiting groove 216. One side of the spring rod 231 close to the middle of the spring seat 212 penetrates through the side wall of the limiting groove 216 and extends into the interior of the hydraulic fluid groove 214. A second return spring is fixedly connected to the side wall of the spring rod 231 inside the limiting groove 216. One end of the second return spring close to the middle of the spring seat 212 is fixedly connected to the interior of the limiting groove 216. The extended end of the spring rod 231 is fixedly connected with a right-angle block 232. When the C-shaped ring 221 slides inside the hydraulic fluid groove 214, it will squeeze the hydraulic fluid inside the hydraulic fluid groove 214 to make it flow in the hydraulic fluid pipe groove 215 and push the spring rod 231 to drive the right-angle block 232 to slide outwards. When multiple spring rods 231 drive the right-angle block 232 to slide, it will squeeze the outer walls of the two opening and closing rings 311.

[0029] The opening and closing component 31 includes an annular groove 312 opened on the side wall of the opening and closing ring 311. A tension spring 313 is fixedly connected between the two opening and closing rings 311. A number of circular grooves 314 are opened on the side of the opening and closing ring 311 close to the main body 1; Wherein, the two opening and closing rings 311 are rotatably connected, and the two opening and closing rings 311 are slidably connected to the side wall of the spring seat 212 away from the extrusion spring 211; The rolling component 32 includes a number of balls 321 rotatably connected inside the annular groove 312. The number of balls 321 is circumferentially arranged around the pump shaft 111. A sealing ring 322 is arranged on the outer surface of the number of balls 321. The middle of the sealing ring 322 is fixedly connected to the outer surfaces of the two opening and closing rings 311. When the right-angle block 232 slides into the annular groove 312 under the extrusion of the opening and closing ring 311, when the right-angle block 232 slides and pushes the semi-circular rod 331 to slide downwards, the inclined part behind the right-angle block 232 will squeeze the top of the sealing ring 322 to deform and then flip downwards on the outer surface of the opening and closing ring 311. When the sealing ring 322 flips downwards on the surface of the opening and closing ring 311 with its middle part, it will squeeze the top of the flexible layer 332 extending outwards.

[0030] The moving component 33 includes a semi-circular rod 331 slidably connected to the outer surfaces of a number of balls 321 inside the annular groove 312. One end of the semi-circular rod 331 away from the extrusion spring 211 is fixedly connected with a flexible layer 332. One end of the flexible layer 332 away from the semi-circular rod 331 slides through the side wall of the opening and closing ring 311 and extends to the outside. A number of return springs 333 are fixedly connected to one end of the semi-circular rod 331 close to the flexible layer 332.

[0031] One ends of the number of return springs 333 away from the semi-circular rod 331 are fixedly connected to the inner wall of the annular groove 312; Among them, when the pump shaft 111 shakes during operation, the closing of the opening and closing assembly 31 can reduce the shaking when the pump shaft 111 shakes. Furthermore, when the flexible layer 332 slides and extends outwards, the extrusion of the sealing ring 322 can further enhance the tightness of the contact surface between the flexible layer 332 and the stationary ring 213, reducing the situation where the flexible layer 332 extends outwards and vibrates or shakes when the ball 321 rotates along with the sliding of the right-angle block 232.

[0032] During use, first connect the sealing shell 112 to the main body 1 with bolts. Then, slide the stationary ring 213 at the bottom along the pump shaft 111 to the bottom inner wall of the pump shaft 111 and the sealing shell 112 and fit it into the inside of the sealing shell 112. Subsequently, fit another stationary ring 213 into the side of the top cover 113 close to the main body 1. Then, fill the oil tank 214 with oil and install the C-ring 221 inside the oil tank 214. Then, pass the two spring seats 212 together with the compression spring 211 through the pump shaft 111 to contact the stationary ring 213 inside the sealing shell 112. Then, pass the top cover 113 with the stationary ring 213 through the pump shaft 111 to contact the spring seat 212 and squeeze it so that the compression spring 211 is compressed under the installation of the top cover 113. After that, connect the top cover 113 to the sealing shell 112 with bolts, and then connect the pump impeller to the top cover 113 to complete the sealing purpose.

[0033] When the compression spring 211 is compressed after the installation of the top cover 113, the elastic force generated during the compression of the compression spring 211 will push the spring seat 212 to drive the C-shaped ring 221 to squeeze the stationary ring 213. When the stationary ring 213 is squeezed by the C-shaped ring 221, the raised ring on the stationary ring 213 will squeeze the C-shaped ring 221 and make it slide inside the oil groove 214, so that the oil inside the oil groove 214 enters the inside of the limit groove 216 through the oil pipe groove 215. When the pump shaft 111 shakes during operation, the shake of the pump shaft 111 will drive the spring seat 212 to shake synchronously. When the spring seat 212 shakes, it will drive the internal C-shaped ring 221 to slide on the surface of the raised ring of the stationary ring 213. When the C-shaped ring 221 slides on the surface of the raised ring, the raised ring on the stationary ring 213 will squeeze the triangular plate inside the C-shaped ring 221 to make the C-shaped ring 221 slide inside the oil groove 214. When the C-shaped ring 221 slides inside the oil groove 214, it will squeeze the oil inside the oil groove 214 to make it flow in the oil pipe groove 215 and push the spring rod 231 to drive the right-angle block 232 to slide outwards. When multiple spring rods 231 drive the right-angle block 232 to slide, it will squeeze the outer walls of the two opening and closing rings 311. When the outer walls of the two opening and closing rings 311 are pushed by multiple right-angle blocks 232, the two opening and closing rings 311 will close. When the two opening and closing rings 311 are squeezed and closed, they will wrap and squeeze the raised ring on the stationary ring 213 inside the spring seat 212. When the closing of the opening and closing ring 311 squeezes the raised ring on the stationary ring 213, it can reduce the relative displacement between the sealed stationary ring 213 and the spring seat 212 when the pump shaft 111 vibrates and shakes, and reduce the influence of the displacement of the contact surface between the spring seat 212 and the stationary ring 213 on the stability of the contact surface seal between the stationary ring 213 and the spring seat 212 when the pump shaft 111 shakes, thereby improving the sealing efficiency.

[0034] When the plurality of spring rods 231 drive the right-angle block 232 to squeeze and push the two opening and closing rings 311, the sliding of the right-angle block 232 will slide into the inside of the annular groove 312 when pushing the opening and closing ring 311. Then, when the spring rod 231 drives the right-angle block 232 to push the opening and closing ring 311 to slide inside the annular groove 312, the sliding of the right-angle block 232 in the annular groove 312 will squeeze the side wall of the ball 321. When the plurality of balls 321 are squeezed by the right-angle block 232, they will drive The semicircular rod 331 slides downward, and when the multiple balls 321 slide downward, they pass through the circular groove 314 and squeeze the side wall of the stationary ring 213. At the same time, when the multiple balls 321 drive the semicircular rod 331 to slide downward, the downward sliding of the semicircular rod 331 will drive the flexible layer 332 to slide downward. Since the flexible layer 332 is inclined at the bottom of the semicircular rod 331, when the semicircular rod 331 drives the flexible layer 332 to slide downward, it will squeeze the side wall of the stationary ring 213 and slide outward to extend. When the multiple balls 321 at the bottom of the two opening and closing rings 311 drive the semicircular rod 331 and the flexible layer 332 to slide downward, the flexible layer 332 can slide outward and extend to fill the space between the spring seat 212 and the stationary ring 213 when the C-shaped ring 221 shakes along the pump shaft 111 on the side wall of the stationary ring 213, thereby reducing the bulge of the opening and closing ring 311 on the extruded stationary ring 213. When the spring seat 212 shakes, warping and gap will occur between the spring seat 212 and the static ring 213, which can reduce the entry of external dust and impurities into the contact surface due to the warping or gap between the spring seat 212 and the static ring 213 caused by the shaking of the pump shaft 111. At the same time, it can also reduce the situation where the sealing performance is reduced when the spring seat 212 shakes and causes a gap, thereby further reducing the situation where the device has gaps when sealing during operation, thereby improving the sealing efficiency.

[0035] Since the spring seat 212 will rotate with the rotation of the pump shaft 111, when the spring seat 212 drives the multiple right-angle blocks 232 to rotate synchronously, the multiple right-angle blocks 232 will slide inside the annular groove 312. When the right-angle block 232 slides to the side wall of the tension spring 313, the inclined surface of the side wall of the right-angle block 232 will slide backward under the pressure of the side walls on both sides of the annular groove 312. At this time, the multiple balls 321 will rotate under the sliding of the right-angle block 232, so that the right-angle block 232 can slide more smoothly through the rotation of the balls 321 when sliding.

[0036] When the extrusion of the right-angle block 232 on the opening and closing ring 311 slides into the inner part of the annular groove 312, when the right-angle block 232 slides and pushes the semi-circular rod 331 downward, the inclined part behind the right-angle block 232 will squeeze the top of the sealing ring 322 to deform it and then turn downward on the outer surface of the opening and closing ring 311. When the sealing ring 322 turns downward on the surface of the opening and closing ring 311 with its middle part, it will squeeze the top of the flexible layer 332 that slides and extends outward downward. Furthermore, when the flexible layer 332 slides and extends outward, the extrusion of the sealing ring 322 can further enhance the tightness of the contact surface between the flexible layer 332 and the static ring 213, reduce the vibration or jitter of the flexible layer 332 when the ball 321 rotates along with the sliding of the right-angle block 232 and extends outward, and further reduce the instability of the contact tightness between the flexible layer 332 and the static ring 213 caused by the rotation of the ball 321 when the flexible layer 332 extends outward. Furthermore, it can further enhance the tightness of the contact between the flexible layer 332 and the static ring 213 when the flexible layer 332 extends outward, further reduce the occurrence of gaps when the spring seat 212 shakes along with the transmission assembly 11, and then enhance the sealing performance of the tight extrusion of the flexible layer 332 on the static ring 213 when the flexible layer 332 extends outward and enhance the sealing efficiency.

[0037] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A submersible pump sealing device, comprising a main body (1), wherein an output end of the main body (1) is fixedly connected to a pump shaft (111), characterized in that: Also includes; A sealing mechanism (2), the sealing mechanism (2) being slidably connected to the outer surface of the pump shaft (111) and used for sealing between the pump shaft (111) and the main body (1); An auxiliary mechanism (3), the auxiliary mechanism (3) sliding inside the sealing mechanism (2) and used to enhance the sealing of the sealing mechanism (2) on the main body (1) when the pump shaft (111) shakes; When the pump shaft (111) is working, the sealing mechanism (2) will seal between the main body (1) and the pump shaft (111); when the pump shaft (111) shakes, the auxiliary mechanism (3) inside the sealing mechanism (2) will strengthen the seal between the sealing mechanism (2) and the main body (1) when the sealing mechanism (2) shakes with the pump shaft (111).

2. A submersible pump sealing device according to claim 1, characterized in that: The main body (1) comprises: A transmission assembly (11), the transmission assembly (11) being threadedly mounted on a side wall of the main body (1) and being used to allow the sealing mechanism (2) to be installed inside the transmission assembly (11) after the main body (1) is assembled; When in use, the transmission assembly (11) and the main body (1) are assembled, and then the sealing mechanism (2) is installed in the transmission assembly (11) to seal the main body (1).

3. A submersible pump sealing device according to claim 2, characterized in that: The sealing mechanism (2) comprises a compression spring (211) slidably arranged on the outer surface of the pump shaft (111), and the sealing mechanism (2) comprises: An extrusion assembly (21), wherein the extrusion assembly (21) is slidably disposed on an outer surface of the pump shaft (111) via a fixing member; a sliding component (22), the sliding component (22) being slidably disposed inside the extrusion component (21); and A pushing component (23), wherein the pushing component (23) is slidably arranged inside the extrusion component (21).

4. A submersible pump sealing device according to claim 3, characterized in that: The auxiliary mechanism (3) comprises two opening and closing rings (311) slidably arranged on the left and right sides of the compression spring (211). The auxiliary mechanism (3) comprises: An opening and closing component (31), wherein the opening and closing component (31) is slidably arranged inside the opening and closing ring (311); a rolling assembly (32), the rolling assembly (32) being rotatably disposed inside the opening and closing assembly (31); and A moving component (33), wherein the moving component (33) is slidably arranged inside the opening and closing component (31).

5. A submersible pump sealing device according to claim 4, characterized in that: A transmission assembly (11), the transmission assembly (11) comprising a sealing shell (112) threadedly connected to the right side of the main body (1), and a top cover (113) threadedly connected to one end of the sealing shell (112) away from the main body (1).

6. A submersible pump sealing device according to claim 5, characterized in that: A fixing member, the fixing member comprising a spring seat (212) fixedly connected to the left and right sides of the pump shaft (111), a stationary ring (213) being provided at one end of the spring seat (212) away from the extrusion spring (211), two stationary rings (213) being slidably connected to the outer surface of the pump shaft (111), and a raised ring being fixedly connected at one end of the stationary ring (213) close to the spring seat (212); An extrusion assembly (21), the extrusion assembly (21) comprising an oil tank (214) disposed on a side of a spring seat (212) away from an extrusion spring (211), a plurality of oil pipe tanks (215) disposed inside the spring seat (212), the plurality of oil pipe tanks (215) being arranged in a circular array with the extrusion spring (211) as the center, and a plurality of limit grooves (216) disposed inside the spring seat (212), the plurality of limit grooves (216) being arranged in a circular array with the extrusion spring (211) as the center; The limiting groove (216) is connected to the interior of the oil tank (214) through the oil pipe groove (215).

7. A submersible pump sealing device according to claim 6, characterized in that: A sliding assembly (22), the sliding assembly (22) comprising a plurality of auxiliary springs (222) fixedly connected to an inner wall of an oil tank (214) close to a squeeze spring (211), one end of the plurality of auxiliary springs (222) away from the squeeze spring (211) being fixedly connected to a C-shaped ring (221), and one end of the C-shaped ring (221) away from the auxiliary spring (222) being fixedly connected to a rear triangular ring; A pushing assembly (23), the pushing assembly (23) comprising a spring rod (231) slidably connected to the inside of the limiting groove (216), a side of the spring rod (231) close to the middle of the spring seat (212) penetrates through the side wall of the limiting groove (216) and extends to the inside of the oil tank (214), a second return spring is fixedly connected to the side wall of the spring rod (231) located inside the limiting groove (216), one end of the second return spring close to the middle of the spring seat (212) is fixedly connected to the inside of the limiting groove (216), and a right-angle block (232) is fixedly connected to the extended end of the spring rod (231).

8. A submersible pump sealing device according to claim 7, characterized in that: An opening and closing assembly (31), the opening and closing assembly (31) comprising an annular groove (312) formed on a side wall of an opening and closing ring (311), a tension spring (313) being fixedly connected between two opening and closing rings (311), and a plurality of circular grooves (314) being formed on a side of the opening and closing ring (311) close to the main body (1); The two opening and closing rings (311) are rotatably connected to each other, and the two opening and closing rings (311) are slidably connected to a side wall of the spring seat (212) away from the extrusion spring (211); A rolling assembly (32), the rolling assembly (32) comprising a plurality of balls (321) rotatably connected inside the annular groove (312), the plurality of balls (321) being arranged in a circular array with the pump shaft (111) as the center, a sealing ring (322) being provided on the outer surface of the plurality of balls (321), the middle portion of the sealing ring (322) being fixedly connected to the outer surfaces of the two opening and closing rings (311).

9. A submersible pump sealing device according to claim 8, characterized in that: A moving assembly (33), the moving assembly (33) comprising a semicircular rod (331) slidably connected to the outer surfaces of a plurality of the balls (321) located inside the annular groove (312), one end of the semicircular rod (331) away from the extrusion spring (211) being fixedly connected to a flexible layer (332), one end of the flexible layer (332) away from the semicircular rod (331) slidingly penetrates the side wall of the opening and closing ring (311) and extends to the outside, and one end of the semicircular rod (331) close to the flexible layer (332) being fixedly connected to a plurality of return springs (333).

10. A submersible pump sealing device according to claim 8, characterized in that: One end of a plurality of the return springs (333) away from the semicircular rod (331) is fixedly connected to the inner wall of the annular groove (312); When the pump shaft (111) shakes during operation, the closing of the opening and closing assembly (31) can reduce the shaking of the pump shaft (111).

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