Non-sealing self-priming pump main shaft supporting structure

Abstract

The utility model discloses a sealing-free self-priming pump main shaft supporting structure which comprises a pump shell, a shaft body is arranged at the upper end of a pump body, and a sealing mechanism used for rotating and sealing the shaft body is arranged between the shaft body and the pump shell. The sealing mechanism comprises a sealing cover, a bearing, a fixing ring, a telescopic rod, a first magnetic ring, a mounting ring, a sealing ring, a second magnetic ring and a friction ring, the sealing cover is arranged between the pump shell and the main shaft, the bearing is arranged at the upper end in the sealing cover, the main shaft is movably connected with the sealing cover through the bearing, and the fixing ring is fixedly arranged on the outer side of the main shaft. A plurality of telescopic rods are evenly and fixedly arranged at the lower end of the outer side surface of the fixing ring. According to the utility model, the magnetic attraction mechanism is added on the basis of the traditional sealing ring extruded and fixed by the spring, so that the condition that the elasticity is insufficient after the spring extends can be compensated, the sealing effect of the sealing ring is always kept, and the sealing effect of the main shaft of the self-priming pump can be improved.

Description

Technical Field

[0001] This utility model relates to the field of sealless self-priming pump technology, specifically to a sealless self-priming pump main shaft support structure. Background Technology

[0002] A seal-less, self-priming pump is a power device used for water conveyance. It primarily relies on the pump's own action to draw water up. The pump chamber contains a liquid storage chamber and a gas-liquid separation chamber. Before the pump starts, there is a certain amount of liquid inside the pump body. After the pump starts, due to the rotation of the impeller, the air in the intake pipe is fully mixed with the liquid inside the pump body and then discharged into the gas-liquid separation chamber. The air in the gas-liquid separation chamber escapes from the top, while the liquid returns to the impeller inlet from the bottom. The remaining air in the intake pipe is mixed again and continues to circulate until the air in the intake pipe is discharged and self-priming is completed.

[0003] In existing technologies, the bearing position of the main shaft of such self-priming pumps should be sealed. In existing technologies, rotary sealing mechanisms are commonly used, which are usually equipped with springs. This allows the springs to continue pressing the seal even after the rotary seal wears slightly, thus maintaining the seal and reducing the frequency of seal replacement. However, as the seal wears, the continuous elongation of the spring will gradually reduce the spring force, resulting in a decrease in the sealing pressure and a deterioration in the sealing effect. Therefore, an improved seal-free self-priming pump main shaft support structure is needed to address this problem. Utility Model Content

[0004] The purpose of this invention is to provide a sealless self-priming pump spindle support structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealless self-priming pump main shaft support structure, including a pump housing, a shaft body provided at the upper end of the pump housing, and a sealing mechanism for rotating and sealing the shaft body between the shaft body and the pump housing. The sealing mechanism includes a sealing cover, a bearing, a fixing ring, a telescopic rod, a first magnetic ring, a mounting ring, a sealing ring, a second magnetic ring, and a friction ring. A sealing cover is provided between the pump housing and the main shaft. A bearing is provided at the upper end inside the sealing cover. The main shaft is movably connected to the sealing cover through the bearing. A fixing ring is fixedly provided on the outer side of the main shaft. A plurality of telescopic rods are uniformly fixedly provided at the lower end of the outer surface of the fixing ring. A first magnetic ring is fixedly provided at the movable end of the telescopic rod. A mounting ring is fixedly provided at the lower end of the first magnetic ring. A sealing ring is fixedly provided at the lower end of the mounting ring. A second magnetic ring is fixedly provided at the lower end inside the sealing cover. A friction ring is fixedly provided at the upper end of the second magnetic ring.

[0006] Preferably, the outer surface of the lower end of the sealing ring is in contact with the friction ring, and the sealing ring and the friction ring can seal the space between the sealing cover and the shaft.

[0007] Preferably, a spring is sleeved on the outer surface of the telescopic rod. The spring of this device is in a compressed state, which can push the first magnetic ring, the mounting ring, and the sealing ring downward, so that the sealing ring can be tightly attached to the outer surface of the friction ring.

[0008] Preferably, the magnetic poles of the first and second magnetic rings are opposite. By utilizing the principle of attraction between opposite poles, when the spring extends and pushes the telescopic rod to extend, causing the sealing ring to move downwards due to wear, the first and second magnetic rings will also move closer to each other. This increases the magnetic force on the first and second magnetic rings, which can compensate for the insufficient elasticity after the spring extends, thus maintaining the sealing effect of the sealing ring and improving the sealing effect of the self-priming pump shaft.

[0009] Preferably, the pump casing is fixedly provided with an inlet at the lower end and an outlet on one side of the pump casing surface. Liquid can be easily drawn in through the inlet and pumped out through the outlet. In order to ensure self-priming, the device is best placed horizontally and then filled with water to ensure the subsequent self-priming effect.

[0010] Preferably, the sealing ring is tightly fitted to the outer surface of the shaft. The sealing ring and the shaft never rotate relative to each other, but rotate together with the shaft. The sealing ring only rubs against the friction ring. The wear and tear is caused by the sealing ring, meaning that after the device has been used for a long time, only the sealing ring needs to be replaced.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. When this utility model is in use, the rotating shaft will continuously rotate, causing the sealing ring to gradually wear. At this time, under the action of the spring, the sealing ring can move down and always fit against the outer surface of the friction ring. As the sealing ring moves down with wear, the elastic force of the spring will gradually decrease, but it will also cause the first magnetic ring and the second magnetic ring to move closer to each other, thereby increasing the magnetic force on the first magnetic ring and the second magnetic ring. This can compensate for the insufficient elastic force after the spring is stretched, thus maintaining the sealing effect of the sealing ring and improving the sealing effect of the self-priming pump main shaft.

[0013] 2. The present invention has a simple structure, which is simply by adding a magnetic ring structure, thus making the device less expensive and easier to promote and use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the main shaft support structure of a sealless self-priming pump according to this utility model;

[0015] Figure 2This is a cross-sectional view of the sealing cover in the main shaft support structure of a sealless self-priming pump according to this utility model;

[0016] Figure 3 This utility model relates to a sealless self-priming pump main shaft support structure. Figure 2 Front view of

[0017] Figure 4 This utility model relates to a sealless self-priming pump main shaft support structure. Figure 3 A magnified view of point A in the middle.

[0018] In the diagram: 1. Pump casing; 2. Shaft; 3. Sealing cover; 4. Bearing; 5. Fixing ring; 6. Telescopic rod; 7. First magnetic ring; 8. Mounting ring; 9. Sealing ring; 10. Second magnetic ring; 11. Friction ring; 12. Spring; 13. Liquid inlet; 14. Liquid outlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a sealless self-priming pump main shaft support structure, including a pump housing 1, a shaft 2 provided at the upper end of the pump housing 1, a sealing mechanism for rotating and sealing the shaft 2 between the shaft 2 and the pump housing 1, the sealing mechanism including a sealing cover 3, a bearing 4, a fixing ring 5, a telescopic rod 6, a first magnetic ring 7, a mounting ring 8, a sealing ring 9, a second magnetic ring 10, and a friction ring 11. The sealing cover 3 is provided between the pump housing 1 and the main shaft, the upper end of the sealing cover 3 is provided with a bearing 4, the main shaft is movably connected to the sealing cover 3 through the bearing 4, the fixing ring 5 is fixedly provided on the outer side of the main shaft, a plurality of telescopic rods 6 are uniformly fixedly provided on the lower end of the outer surface of the fixing ring 5, the movable end of the telescopic rod 6 is fixedly provided with a first magnetic ring 7, the lower end of the first magnetic ring 7 is fixedly provided with a mounting ring 8, the lower end of the mounting ring 8 is fixedly provided with a sealing ring 9, the lower end of the sealing cover 3 is fixedly provided with a second magnetic ring 10, and the upper end of the second magnetic ring 10 is fixedly provided with a friction ring 11.

[0021] The outer surface of the lower end of the sealing ring 9 is in contact with the friction ring 11. The sealing ring 9 and the friction ring 11 can seal the space between the sealing cover 3 and the shaft 2.

[0022] A spring 12 is sleeved on the outer surface of the telescopic rod 6. The spring 12 of this device is in a compressed state, which can push the first magnetic ring 7, the mounting ring 8, and the sealing ring 9 downward, so that the sealing ring 9 can be tightly attached to the outer surface of the friction ring 11.

[0023] The first magnetic ring 7 and the second magnetic ring 10 have opposite magnetic poles. Thus, through the principle of attraction between opposite poles, when the spring 12 extends and pushes the telescopic rod 6 to extend, causing the sealing ring 9 to move downward with wear, the first magnetic ring 7 and the second magnetic ring 10 will also move closer to each other. This will increase the magnetic force on the first magnetic ring 7 and the second magnetic ring 10, thereby compensating for the insufficient elasticity of the spring 12 after it extends, thus maintaining the sealing effect of the sealing ring 9 and improving the sealing effect of the self-priming pump main shaft.

[0024] The pump housing 1 is fixedly provided with a liquid inlet 13 at the lower end, and a liquid outlet 14 is provided on one side of the surface of the pump housing 1. Liquid can be easily drawn in through the liquid inlet 13, and liquid can be pumped out through the liquid outlet 14. In order to ensure self-priming, this device is best placed horizontally and then the pump housing 1 is filled with water to ensure the subsequent self-priming effect.

[0025] The sealing ring 9 is tightly fitted to the outer surface of the shaft 2. The sealing ring 9 and the shaft 2 never rotate relative to each other, but rotate together with the shaft 2. The sealing ring 9 only rubs against the friction ring 11. The wear and tear is caused by the sealing ring 9, which means that after the device has been used for a long time, only the sealing ring 9 needs to be replaced.

[0026] Working principle: When using this device, the seal between the shaft 2 and the sealing cover 3 is achieved by the sealing ring 9 tightly squeezing the friction ring 11. As the device is used, the shaft rotates continuously, causing the sealing ring 9 to gradually wear. At this time, under the action of the spring 12, the sealing ring 9 can move down and always fit against the outer surface of the friction ring 11. As the sealing ring 9 moves down with wear, the elastic force of the spring 12 will gradually decrease, but it will also cause the first magnetic ring 7 and the second magnetic ring 10 to move closer to each other. This will increase the magnetic force on the first magnetic ring 7 and the second magnetic ring 10, thereby compensating for the insufficient elastic force after the spring 12 extends, thus maintaining the sealing effect of the sealing ring 9 and improving the sealing effect of the self-priming pump shaft.

[0027] Furthermore, this device has a simple structure, with only the addition of a magnetic ring, which makes it low-cost and easy to promote and use.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealless self-priming pump main shaft support structure, comprising a pump casing (1), characterized in that: The pump housing (1) is provided with a shaft (2) at its upper end. A sealing mechanism for rotating and sealing the shaft (2) is provided between the shaft (2) and the pump housing (1). The sealing mechanism includes a sealing cover (3), a bearing (4), a fixing ring (5), a telescopic rod (6), a first magnetic ring (7), a mounting ring (8), a sealing ring (9), a second magnetic ring (10), and a friction ring (11). A sealing cover (3) is provided between the pump housing (1) and the main shaft. A bearing (4) is provided at the upper end of the inside of the sealing cover (3). The main shaft passes through the bearing (4). The main shaft is movably connected to the sealing cover (3). A fixing ring (5) is fixedly provided on the outside of the main shaft. Several telescopic rods (6) are evenly fixedly provided on the lower end of the outer surface of the fixing ring (5). A first magnetic ring (7) is fixedly provided on the movable end of the telescopic rod (6). An installation ring (8) is fixedly provided on the lower end of the first magnetic ring (7). A sealing ring (9) is fixedly provided on the lower end of the installation ring (8). A second magnetic ring (10) is fixedly provided on the lower end of the inside of the sealing cover (3). A friction ring (11) is fixedly provided on the upper end of the second magnetic ring (10).

2. The sealless self-priming pump main shaft support structure according to claim 1, characterized in that: The outer surface of the lower end of the sealing ring (9) is in contact with the friction ring (11).

3. The sealless self-priming pump main shaft support structure according to claim 1, characterized in that: A spring (12) is fitted on the outer surface of the telescopic rod (6).

4. The sealless self-priming pump main shaft support structure according to claim 1, characterized in that: The first magnetic ring (7) and the second magnetic ring (10) are adjacent to opposite magnetic poles.

5. The sealless self-priming pump main shaft support structure according to claim 1, characterized in that: The pump housing (1) is fixedly provided with an inlet (13) at the lower end, and an outlet (14) is provided on one side of the surface of the pump housing (1).

6. The sealless self-priming pump main shaft support structure according to claim 1, characterized in that: The sealing ring (9) fits tightly against the outer surface of the shaft (2).

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