Low noise screw pump sealing structure

Abstract

The utility model discloses a low noise screw rod pump sealing structure, including the pump shell, the one side fixed connection of pump shell has the discharge gate, the top fixed connection of pump shell has the feed port, and the inside rotatory connection of pump shell other side has the transmission shaft, and one end fixed connection of transmission shaft has the universal joint, and the other end fixed connection of universal joint has the rotor, and the outer wall sliding connection of rotor has the matching stator, along with fixed thread pin linear motion in fixed thread block inside can drive sealing mounting block linear motion, and sealing mounting block linear motion can promote sealing bellows and compress inwards, and the sealing bellows outer diameter of inwards compression can increase, to fill sealing fixed shell inside and carry out the sealing, when the corrosion failure of sealing appears, continue to rotate fixed thread pin, can further compress sealing bellows, improve sealing bellows wave crest density, can offset the sealing failure of corrosion, can reduce the replacement frequency of sealing material.

Description

Technical Field

[0001] This utility model belongs to the field of screw pump sealing technology, specifically a low-noise screw pump sealing structure. Background Technology

[0002] Low-noise screw pumps are positive displacement rotary pumps. They rely on the volume change of the sealed cavity formed by the screw and bushing to draw in and discharge liquids. Screw pumps are classified according to the number of screws into single-screw pumps, twin-screw pumps, triple-screw pumps, and five-screw pumps. Screw pumps are characterized by stable flow, small pressure pulsation, self-priming capability, low noise, high efficiency, long service life, and reliable operation. Their outstanding advantages are that they do not form eddies when conveying media, are not sensitive to the viscosity of the media, and can convey high-viscosity media. Screw pumps are equipped with multiple flanges for connecting the pipelines on the screw pump.

[0003] According to the patent announcement number "CN208024554U" published on the China Patent Network, entitled "A Sealing Structure for a Screw Pump," it includes a first flange. The top of the first flange is fixedly connected to the bottom of a first fixed plate. The top of the first fixed plate is fixedly connected to the bottom of a plug rod. The top of the plug rod is inserted into the inner wall of a slot. The slot is located at the bottom of a second fixed plate. The top of the first fixed plate is fixedly connected to the bottom of a positioning rod. The positioning rod is inserted into the inner wall of a positioning hole, which is located on the second fixed plate. This sealing structure for a screw pump, through the positioning rod fixedly connected to the top of the first fixed plate and the positioning hole on the second fixed plate, can enhance the positioning accuracy and facilitate the installation of the first and second flanges together. The sealing ring fixedly connected to the top of the first fixed plate and the inner core fixedly connected to the inner wall of the sealing ring, through which the inner core deforms under pressure, achieves a good sealing effect.

[0004] Although the aforementioned patent can achieve a sealing effect after the inner core deforms, the inner core is constantly subjected to impact and corrosion from the substances inside the pump during the operation of the screw pump, which can damage the sealing inner core and cause the seal to fail, requiring frequent replacement of the sealing inner core. Utility Model Content

[0005] The purpose of this invention is to provide a low-noise screw pump sealing structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A low-noise screw pump sealing structure includes a pump housing, a discharge port fixedly connected to one side of the pump housing, a feed port fixedly connected to the top of the pump housing, a drive shaft rotatably connected to the other side of the pump housing, a universal joint fixedly connected to one end of the drive shaft, a rotor fixedly connected to the other end of the universal joint, a matching stator slidably connected to the outer wall of the rotor, and a sealing mechanism and a buffer mechanism provided outside the drive shaft.

[0008] More preferably, the sealing mechanism includes a sealing and fixing shell rotatably connected to the outside of one end of the transmission shaft, and two fixing threaded blocks are symmetrically installed on the outer wall of the sealing and fixing shell. The fixing threaded blocks are internally threaded with fixing threaded pins, and the other end of the fixing threaded pins passes through the sealing and fixing blocks and is slidably connected to the sealing and fixing blocks.

[0009] More preferably, the sealing mechanism further includes a sealing bellows that is slidably connected inside the sealing housing.

[0010] More preferably, the buffer mechanism includes two rebound rods penetrating the other side of the sealing mounting block, with a sealing gasket fixedly connected to one end of each rebound rod and a limit plate fixedly connected to the other end of each rebound rod.

[0011] More preferably, the buffer mechanism further includes a spring disposed between the sealing gasket and the sealing mounting block on the rebound rod.

[0012] More preferably, one side of the sealing mounting block is provided with a spring mounting hole that matches the rebound spring.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a rotating fixed threaded pin is inserted into a fixed threaded block via a threaded action. As the fixed threaded pin moves linearly within the fixed threaded block, it drives the sealing mounting block to move linearly. This linear movement of the sealing mounting block compresses the sealing bellows inward, increasing its outer diameter and filling the interior of the sealing housing for sealing. In the event of corrosion failure, continuing to rotate the fixed threaded pin further compresses the sealing bellows, increasing its crest density and counteracting the seal failure caused by corrosion, thus reducing the frequency of sealing material replacement.

[0015] During the operation of the threaded rod pump, the sealing bellows is subjected to repeated impacts. When the sealing bellows is impacted, it will shift. The displaced sealing bellows will drive the sealing gasket to move linearly. The linearly moving sealing gasket can squeeze the sealing tube inward under the elastic action of the rebound spring, buffering the displacement of the sealing bellows, reducing the wear caused by the linear motion of the sealing bellows, and extending the service life of the sealing bellows.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 : A schematic diagram of the overall structure of this utility model.

[0018] Figure 2 : Overall structural cross-sectional view of this utility model.

[0019] Figure 3 : A schematic diagram of the sealing mechanism of this utility model.

[0020] Figure 4 : A cross-sectional view of the sealing mechanism of this utility model.

[0021] Figure 5 : Exploded view of the sealing mechanism structure of this utility model.

[0022] Figure 6 : A schematic diagram of the buffer mechanism of this utility model.

[0023] Reference numerals in the attached drawings: 1. Pump casing; 2. Discharge port; 3. Inlet port; 4. Drive shaft; 5. Universal joint shaft; 6. Rotor; 7. Stator; 8. Sealing and fixing shell; 9. Fixed threaded block; 10. Fixed threaded pin; 11. Sealing mounting block; 12. Sealing bellows; 13. Sealing gasket; 14. Rebound rod; 15. Rebound spring; 16. Limiting plate; 17. Spring mounting hole. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please see Figures 1 to 6 This utility model provides a technical solution: a low-noise screw pump sealing structure, including a pump housing 1, a discharge port 2 fixedly connected to one side of the pump housing 1, a feed port 3 fixedly connected to the top of the pump housing 1, a drive shaft 4 rotatably connected inside the other side of the pump housing 1, a universal joint 5 fixedly connected to one end of the drive shaft 4, a rotor 6 fixedly connected to the other end of the universal joint 5, a matching stator 7 slidably connected to the outer wall of the rotor 6, and a sealing mechanism and a buffer mechanism provided outside the drive shaft 4.

[0026] like Figures 1 to 4As shown, in this embodiment of the present invention, the sealing mechanism includes a sealing and fixing shell 8 rotatably connected to the outside of one end of the transmission shaft 4, and two fixing threaded blocks 9 are symmetrically installed on the outer wall of the sealing and fixing shell 8. The fixing threaded blocks 9 are internally threaded with fixing threaded pins 10, and the other end of the fixing threaded pins 10 passes through the sealing mounting block 11 and is slidably connected to the sealing mounting block 11. The sealing mechanism also includes a sealing bellows 12 slidably connected inside the sealing and fixing shell 8.

[0027] In this embodiment of the invention, rotating the fixed threaded pin 10 causes it to penetrate into the fixed threaded block 9 via the threaded action. As the fixed threaded pin 10 moves linearly within the fixed threaded block 9, it drives the sealing mounting block 11 to move linearly. The linear movement of the sealing mounting block 11 pushes the sealing bellows 12 inward, compressing it. The outer diameter of the inwardly compressed sealing bellows 12 increases, thus filling the interior of the sealing fixing shell 8 for sealing. In the event of corrosion failure of the seal, continuing to rotate the fixed threaded pin 10 can further compress the sealing bellows 12, increasing the peak density of the sealing bellows 12, which can offset the seal failure caused by corrosion and reduce the frequency of sealing material replacement.

[0028] like Figure 5 and Figure 6 As shown, in this embodiment, the buffer mechanism includes two rebound rods 14 that penetrate through the other side of the sealing mounting block 11. One end of the rebound rod 14 is fixedly connected to a sealing gasket 13, and the other end of the rebound rod 14 is fixedly connected to a limiting plate 16. The buffer mechanism also includes a rebound spring 15 disposed between the rebound rod 14 and the sealing mounting block 11. A spring mounting hole 17 matching the rebound spring 15 is provided on one side of the sealing mounting block 11.

[0029] In this embodiment, during the operation of the threaded rod pump, the sealing bellows 12 is subjected to repeated impacts. When the sealing bellows 12 is impacted, it will shift. The displaced sealing bellows 12 drives the sealing gasket 13 to move linearly. The linearly moving sealing gasket 13 can squeeze the sealing tube 12 inward under the elastic action of the rebound spring 15, buffering the shift of the sealing bellows 12, reducing the wear of the sealing bellows 12 caused by linear movement, and extending the service life of the sealing bellows 12.

[0030] In use, first rotate the fixed threaded pin 10. The fixed threaded pin 10 passes into the fixed threaded block 9 through the thread action. As the fixed threaded pin 10 moves linearly inside the fixed threaded block 9, it can drive the sealing mounting block 11 to move linearly. The linear movement of the sealing mounting block 11 can push the sealing bellows 12 to compress inward. The outer diameter of the inwardly compressed sealing bellows 12 will increase, thereby filling the interior of the sealing fixing shell 8 for sealing. When the seal fails due to corrosion, continue to rotate the fixed threaded pin 10 to further compress the sealing bellows 12, increase the peak density of the sealing bellows 12, which can offset the sealing failure caused by corrosion and reduce the frequency of replacement of the sealing material.

[0031] During the operation of the threaded rod pump, the sealing bellows 12 is subjected to repeated impacts. When the sealing bellows 12 is impacted, it will shift. The shifted sealing bellows 12 drives the sealing gasket 13 to move linearly. The linearly moving sealing gasket 13 can squeeze the sealing tube 12 inward under the elastic action of the rebound spring 15, buffering the shift of the sealing bellows 12, reducing the wear of the sealing bellows 12 caused by linear movement, and extending the service life of the sealing bellows 12.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-noise screw pump sealing structure, comprising a pump casing (1), characterized in that: A discharge port (2) is fixedly connected to one side of the pump casing (1), and a feed port (3) is fixedly connected to the top of the pump casing (1). A drive shaft (4) is rotatably connected to the other side of the pump casing (1). A universal joint (5) is fixedly connected to one end of the drive shaft (4), and a rotor (6) is fixedly connected to the other end of the universal joint (5). A matching stator (7) is slidably connected to the outer wall of the rotor (6). A sealing mechanism and a buffer mechanism are provided on the outside of the drive shaft (4).

2. The low-noise screw pump sealing structure according to claim 1, characterized in that: The sealing mechanism includes a sealing and fixing shell (8) rotatably connected to the outside of one end of the transmission shaft (4), and two fixing threaded blocks (9) are symmetrically installed on the outer wall of the sealing and fixing shell (8). The fixing threaded blocks (9) are internally threaded with fixing threaded pins (10), and the other end of the fixing threaded pins (10) passes through the sealing mounting block (11) and is slidably connected to the sealing mounting block (11).

3. The low-noise screw pump sealing structure according to claim 2, characterized in that: The sealing mechanism also includes a sealing bellows (12) that is slidably connected inside the sealing housing (8).

4. The low-noise screw pump sealing structure according to claim 2, characterized in that: The buffer mechanism includes two spring rods (14) that penetrate the other side of the sealing mounting block (11), and a sealing gasket (13) is fixedly connected to one end of the spring rod (14), and a limit plate (16) is fixedly connected to the other end of the spring rod (14).

5. The low-noise screw pump sealing structure according to claim 4, characterized in that: The buffer mechanism also includes a spring (15) disposed between the sealing gasket (13) and the sealing mounting block (11) on the rebound rod (14).

6. The low-noise screw pump sealing structure according to claim 5, characterized in that: The sealing mounting block (11) has a spring mounting hole (17) on one side that matches the rebound spring (15).

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