CN217440238U - Fluid pump - Google Patents

Abstract

The utility model relates to a technical field that fluid carried, concretely relates to technical field of fluid pump, it includes the motor and installs in the base of the output of motor, the motor have the casing with rotate set up in the output shaft of output, the cover is equipped with the bearing seal on the output, be equipped with on the base and hold the chamber is acceptd to the bearing seal, the clearance between sealed output shaft of bearing seal and the casing. This application has and can effectively improve water or steam and get into the inside problem that causes the motor to rust the inefficacy of motor to promote fluid pump's life's effect.

Description

Fluid pump

Technical Field

The application relates to the technical field of fluid conveying, in particular to a fluid pump.

Background

A pump is a machine that delivers or pressurizes a fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, causing the liquid energy to increase. The pump is mainly used for conveying liquid such as water, oil, acid-base liquid, emulsion, suspension emulsion and liquid metal, and can also be used for conveying liquid, gas mixture and liquid containing suspended solid.

The pump includes the pump body and power supply, and the power supply causes pressure differential to inhale the fluid and discharges again through in the pump body, and the power supply of the pump on the existing market generally uses the motor, nevertheless because the motor is with pump body lug connection, in the actual work in-process, the fluid existence that carries gets into inside the motor, causes the condition that spare part rusted or even damaged.

With respect to the related art in the above, the inventors consider that there is a drawback that the service life of the pump is low.

Disclosure of Invention

The object of the present application is to provide a fluid pump, aiming at improving the defect of low service life of the fluid pump.

A fluid pump comprises a motor and a base arranged at the output end of the motor, wherein the motor is provided with a shell and an output shaft rotatably arranged at the output end, a shaft seal is sleeved on the output end, a containing cavity for containing the shaft seal is arranged on the base, and the shaft seal seals a gap between the output shaft and the shell.

By adopting the technical scheme, as the output shaft is rotationally connected with the motor shell, a certain gap exists at the joint of the output shaft and the motor shell, and water or water vapor in the air enters the motor through the gap in the actual use condition, so that parts in the motor rust and even lose efficacy, and the service life of the fluid pump is reduced; therefore, the shaft seal is arranged at the connecting position between the output shaft and the motor shell to block a connecting gap between the output shaft and the motor shell, so that water, steam and other fluids are prevented from flowing into the motor from the gap to corrode parts in the motor, and the service life of the fluid pump is effectively prolonged.

Optionally, the shaft seal includes a first sealing portion fixedly connected to the output end and a second sealing portion sealingly sleeved on the output shaft, and the first sealing portion and the second sealing portion are integrally formed.

Through adopting above-mentioned technical scheme, first sealing and output fixed connection, tightly fix the bearing seal on the output under the extrusion of base, the second sealing cover is established on the output shaft, seal the joint gap between output shaft and the motor casing, first sealing and second sealing integrated into one piece, make whole bearing seal firmly fix on the output, the second sealing seals the clearance between output shaft and the motor, thereby reached and prevented that fluids such as water or steam from getting into the motor inside and the condition emergence of corroding motor spare part, and then improved fluid pump's life.

Optionally, the first sealing portion has a connecting end and a mounting end, the connecting end and the mounting end both have openings, and the opening of the mounting end is larger than the opening of the connecting end.

Through adopting above-mentioned technical scheme, when establishing the bearing seal cover on the output, need aim at the output with the opening of installation end, because the opening of installation end is greater than the opening of link, so the opening of installation end still has the guide effect for can distinguish the installation order of bearing seal at a glance when the cover is established, the shaft seal of more easy to assemble.

Optionally, an annular protrusion in sealing fit with the inner wall of the accommodating cavity is arranged around the outer circumferential surface of the first sealing part.

Through adopting above-mentioned technical scheme, when taking the bearing seal, the bellied existence of annular has increased the frictional force when taking the bearing seal, and the convenience is established the bearing seal cover on the output shaft for it is inseparabler when establishing the cover, has improved sealed effect.

Optionally, the annular protrusions are provided with two or more than two, and a first accommodating space is formed between every two adjacent annular protrusions.

Through adopting above-mentioned technical scheme, the existence of first accommodation space, when the shaft seal is installed, the annular arch on the wall of the chamber of accommodating of base and the first sealing portion extrudees and makes its deformation for the annular arch can be to first accommodation space department extension, makes deformation easier, thereby makes the butt inseparabler and more stable between the wall of the chamber of accommodating and the first sealing portion, thereby can further seal the clearance between motor housing and the output shaft.

Optionally, the second sealing portion is provided with a first opening and a second opening, the first opening is communicated with the inside of the connecting end of the first sealing portion, and the inner diameter of the second sealing portion is gradually reduced from the first opening to the second opening.

By adopting the above technical scheme, firstly, because the output shaft is generally cylindrical, when the second sealing part is sleeved on the output shaft, because the inner diameter of the second sealing part is gradually reduced from the first opening to the second opening, the caliber of the first opening is larger than the shaft diameter of the output shaft, the output shaft can be smoothly sleeved; secondly, demolding is facilitated in the shaft seal manufacturing process; when the output shaft is sleeved with the sealing device, a second accommodating space is formed between the position of the second sealing part, which is close to the first sealing part, and the output shaft, and the second accommodating space can allow the second sealing part to deform in the direction close to the output shaft, so that the second accommodating space is filled up by the second sealing part under the extrusion of the base, the second sealing part is connected with the output shaft more tightly, and a gap between the output shaft and the motor shell is sealed; and because the output shaft needs to rotate during operation, the second accommodating space also reduces the friction between the second sealing part and the output shaft, and the loss of the second sealing part is delayed.

Optionally, the outer diameter of the second sealing portion gradually decreases from the first opening to the second opening.

Through adopting above-mentioned technical scheme, the cross section from first opening toward second opening direction of second sealing is trapezoidal, the aim at who sets up like this, when the installation bearing seal, the surface of second sealing with accept chamber wall butt, the surface is the inclined plane this moment, it extrudees to accept chamber wall top-down, make the second sealing take place deformation and the output shaft is laminated more, and then can be fine with the joint gap sealing between casing and the output shaft, reach and prevent that steam from getting into the inside corruption spare part of motor, improve fluid pump's life's effect.

Optionally, the second sealing portion is provided in a film shape.

By adopting the technical scheme, the second sealing part is directly sleeved on the output shaft and used for sealing the connecting gap between the motor shell and the output shaft, and the output shaft rotates in the working state and can wear the second sealing part as long as time passes, so that the second sealing part is arranged into a film shape, the maximum static friction force is reduced, the reaction force is further reduced, the effect of protecting the second sealing part is achieved, and the service life of the shaft seal is prolonged.

Optionally, a guide inclined plane is arranged at the opening of the base close to the containing cavity.

Through adopting above-mentioned technical scheme, the existence on guide inclined plane has increased the opening of acceping the chamber, play certain guide effect, when installing in addition, base and motor casing butt, the setting up on guide inclined plane makes acceping the chamber wall and form third accommodation space with motor casing, and the bearing seal of acceping the intracavity takes place deformation under the extrusion of base, then the bearing seal can extend to third accommodation space, the effect that this brought is exactly that makes the bearing seal installation more stable firm, thereby improve the sealing performance of bearing seal.

Optionally, the shaft seal is a sealing ring.

Through adopting above-mentioned technical scheme, the sealing washer adopts flexible deformable materials such as rubber silica gel usually, and the sealing washer can be sealed as far as through elastic deformation so that the clearance between consequently can the at utmost plug up the clearance between output shaft and the motor casing, and it leads to its damage inefficacy to reduce inside its spare part of corroding of water or steam entering motor.

In summary, the present application includes at least one of the following beneficial technical effects: the motor is easy to mount and dismount, and the gap between the motor shell and the output shaft can be effectively sealed, so that fluid such as water or steam is prevented from entering the motor, parts of the motor are prevented from being corroded, and the effect of prolonging the service life of the fluid pump is achieved; the raw materials are cheap and easy to obtain, the production cost is low, and the market popularization is facilitated.

Drawings

FIG. 1 is a schematic cross-sectional view of a fluid pump of the present application;

FIG. 2 is an exploded view of a fluid pump of the present application;

FIG. 3 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 4 is a schematic view of the overall construction and cross-sectional construction of a shaft seal of a fluid pump of the present application;

FIG. 5 is a schematic illustration of a fluid pump shaft seal of the present application in cooperation with a motor output and output shaft.

In the figure, 1, a pump body; 10. a base; 100. an accommodating cavity; 101. a guide ramp; 102. a third accommodating space; 11. an air tube; 12. a valve plate; 13. an air chamber; 14. a piston; 15. a cylinder; 16. a connecting rod; 17. a steel needle; 18. an eccentric wheel;

2. a motor; 20. an output end; 21. an output shaft; 3. shaft sealing; 31. a first seal portion; 310. an installation end; 311. a connecting end; 312. an annular projection; 313. a first accommodating space; 32. a second seal portion; 320. a first opening; 321. a second opening; 322. a second accommodating space.

Detailed Description

The present application is described in further detail below with reference to fig. 1-5.

A fluid pump seals a connecting gap between a shell of a motor 2 and an output shaft 21 to prevent moisture in hot air from entering the motor 2 through the gap to corrode parts of the motor 2, and finally the effect of prolonging the service life of the fluid pump is achieved.

Referring to fig. 1 and 2, the fluid pump includes a pump body 1, a motor 2, and a shaft seal 3 sleeved on an output end 20 of the motor 2, wherein the output end 20 is located on a casing of the motor 2, and in this embodiment, the output shaft 21 is a cylindrical small boss to accommodate parts such as a bearing, and correspondingly, the output shaft is fixedly connected with an inner ring of the bearing. The pump body 1 includes the base 10, base 10 and the 2 output 20 fixed connection of motor, the bottom of base 10 is equipped with accepts chamber 100, it holds output shaft 21 and bearing seal 3 to accept chamber 100, and bearing seal 3 seals the joint gap between output shaft 21 and the motor 2 for inside water or steam in the pump body 1 can't get into motor 2 through the clearance, and then can prevent that motor 2's spare part from being corroded and damaged, finally reach the effect that improves fluid pump's life.

Referring to fig. 1 and 2, the pump body 1 further includes an air tube 11, a valve plate 12, an air chamber 13, a piston 14, an air cylinder 15, a connecting rod 16, a steel needle 17, an eccentric wheel 18, and a mounting screw, and the connection positions of these components are familiar to those skilled in the art and will not be described in detail herein.

Referring to fig. 1 and 3, the shaft seal 3 is made of a flexible waterproof material, in this embodiment, specifically, a seal ring, which is known to be capable of undergoing a certain elastic deformation, and specifically, a material such as rubber, resin, or the like. The purpose is that the deformable material can make the shaft seal 3 more fit the output end 20 and the output shaft 21, and can seal the gap to the greatest extent, so that the fluid such as water or steam can not pass through.

Referring to fig. 3 and 4, in particular, the sealing ring of the present application is different from a conventional sealing ring, that is, the shaft seal 3 of the present application includes a first sealing portion 31 and a second sealing portion 32, and the second sealing portion 32 is disposed on the first sealing portion 31 and is integrally formed with the first sealing portion 31, which is beneficial to improving the integrity of the shaft seal 3. When the sealing device is used, the first sealing portion 31 is sleeved on the output end 20, the second sealing portion 32 is sleeved on the output shaft 21, and the accommodating cavity wall extrudes the shaft seal 3, so that the shaft seal 3 is attached to the output end 20 and the output shaft 21 more tightly, the sealing performance is further improved, and a gap between the output shaft 21 and a shell of the motor 2 is sealed.

Referring to fig. 4, the first sealing portion 31 is an annular rubber sealing ring, the first sealing portion 31 has a mounting end 310 and a connecting end 311, both the mounting end 310 and the connecting end 311 have openings, and the opening of the mounting end 310 is larger than the opening of the connecting end 311. The purpose of this arrangement is to be able to adapt to the output shaft 21, i.e. to tightly fit the output shaft 21, and the larger opening of the mounting end 310 also plays a guiding role, i.e. when mounting, the opening of the mounting end 310 is aligned with the output end 20 of the motor 2, so that it is more convenient and easier to mount the shaft seal 3.

Referring to fig. 4, the outer ring of the first sealing portion 31 is provided with two annular protrusions 312. This is intended to increase the friction when mounting and dismounting the shaft seal 3, making mounting and dismounting easier.

Referring to fig. 4, further, a first receiving space 313 is formed between the two annular protrusions 312, and the presence of the first receiving space 313 provides a space for the annular protrusions 312 to deform. That is, when the shaft seal 3 is installed, the base 10 extrudes the shaft seal 3, and the first accommodating space 313 formed by the two annular protrusions 312 provides a space for deformation, so that the annular protrusions 312 can deform more, that is, the connection gap between the output shaft 21 and the casing of the motor 2 can be sealed to the greatest extent, and fluids such as water or steam can be prevented from entering the inside of the motor 2 to the greatest extent.

Further, referring to fig. 3 and 4, a guiding inclined plane 101 is disposed at the opening of the base 10 near the wall of the accommodating cavity. The shaft seal 3 is sleeved on the output end 20, when the base 10 is connected with the motor 2 shell, the accommodating cavity wall extrudes the shaft seal 3, a third accommodating space 102 is formed between the guide inclined plane 101 and the motor 2 shell, so that the annular protrusion 312 on the first sealing part 31 extends to the third accommodating space 102 when being extruded by the base 10, the shaft seal 3 is more tightly attached to the output end 20, the output shaft 21 and the accommodating cavity wall, and a gap between the motor 2 shell and the output shaft 21 is further sealed.

Referring to fig. 4, the second sealing portion 32 is specifically formed in a film shape. The purpose of this arrangement is to reduce the reaction force and the maximum static friction force, because the second sealing portion 32 is sleeved on the output shaft 21, and the output shaft 21 rotates when the motor 2 is operated, the second sealing portion 32 is arranged in a film shape to reduce the friction and further reduce the loss of the second sealing portion 32, thereby prolonging the service life of the shaft seal 3.

Referring to fig. 4 and 5, the second sealing part 32 is provided with a first opening 320 and a second opening 321, and the first opening 320 communicates with the opening of the connection end 311 of the first sealing part 31. The inner diameter of the first opening 320 is larger than that of the second opening 321, and the inner diameter of the second sealing portion 32 is gradually reduced from the first opening 320 to the second opening 321. The advantage of this arrangement is that, in the first aspect, when the shaft seal 3 is sleeved on the output shaft 21, the inner diameters of the first opening 320 to the second opening 321 and the second sealing portion 32 are gradually reduced, so that the second sealing portion 32 can be conveniently sleeved, that is, a certain guiding function is achieved, and when the second sealing portion 32 is sleeved on the output shaft 21, the second accommodating space 322 is formed between the second sealing portion 32 and the output shaft 21. The presence of the second accommodation space 322, which reduces the friction of the second seal portion 32 with the output shaft 21, delays the wear of the second seal portion 32; secondly, when the base 10 extrudes the second sealing portion 32, the second sealing portion deforms toward the second accommodating space 322, so that the gap between the motor 2 casing and the output shaft 21 is sealed more thoroughly.

Referring to fig. 3 to 5, the second sealing portion 32 has a trapezoidal cross-sectional shape, in which the outer diameter gradually decreases from the first opening 320 to the second opening 321. The purpose of this is to make the thickness of the entire second sealing portion 32 thin, so that the entire second sealing portion 32 is relatively easily deformed, and the second sealing portion 32 is deformed to fill the second accommodating space without excessively large force when the accommodating chamber wall presses the second sealing portion 32, thereby sealing the gap between the output shaft 21 and the motor 2 housing. In addition, this also saves material.

The implementation principle of the embodiment of the application is as follows: the shaft seal 3 is arranged at the joint of the base 10 and the motor 2 and used for sealing the gap between the output shaft 21 and the shell of the motor 2, so that fluid such as water or steam is prevented from entering the motor 2 and corroding parts in the motor 2, and the effect of prolonging the service life of the fluid pump is achieved.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The fluid pump is characterized by comprising a motor (2) and a base (10) arranged at an output end (20) of the motor (2), wherein the motor (2) is provided with a shell and an output shaft (21) which is rotatably arranged at the output end (20), a shaft seal (3) is sleeved on the output end (20), an accommodating cavity (100) for accommodating the shaft seal (3) is formed in the base (10), and the shaft seal (3) seals a gap between the output shaft (21) and the shell.

2. Fluid pump according to claim 1, characterised in that the shaft seal (3) comprises a first sealing portion (31) fixedly connected to the output (20) and a second sealing portion (32) sealingly arranged on the output shaft (21), the first sealing portion (31) and the second sealing portion (32) being formed in one piece.

3. Fluid pump according to claim 2, characterised in that the first sealing section (31) has a connection end (311) and a mounting end (310), the connection end (311) and the mounting end (310) each having an opening, the opening of the mounting end (310) being larger than the opening of the connection end (311).

4. A fluid pump according to claim 2 or 3, wherein the outer circumferential surface of the first sealing portion (31) is provided with an annular projection (312) which is in sealing engagement with the inner wall of the housing chamber (100) around.

5. The fluid pump as claimed in claim 4, wherein the annular protrusions (312) are provided in two or more, and a first receiving space (313) is formed between adjacent annular protrusions (312).

6. The fluid pump according to claim 2, wherein the second seal portion (32) is provided with a first opening (320) and a second opening (321), the first opening (320) communicates with an opening of the connection end (311) of the first seal portion (31), and an inner diameter of the second seal portion (32) is gradually reduced from the first opening (320) toward the second opening (321).

7. The fluid pump according to claim 6, wherein the outer diameter of the second seal portion (32) is gradually reduced from the first opening (320) toward the second opening (321).

8. The fluid pump according to claim 2, wherein the second seal portion (32) is provided in a film shape.

9. Fluid pump according to claim 1, characterised in that the base (10) is provided with a guide bevel (101) close to the opening of the housing cavity (100).

10. Fluid pump according to claim 1, characterised in that the shaft seal (3) is a sealing ring.

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