A pump with an internal circulation filter protection module

Abstract

The application belongs to the technical field of pumps and provides a pump with an internal circulation filtering module, which comprises a front bearing seat and a filtering module. The front bearing seat comprises a first recessed groove part, the bottom of the first recessed groove part is provided with a shaft mounting hole, the motor shaft of the pump is arranged in the shaft mounting hole, the front end of the motor shaft is sleeved with a front end bearing, and the first recessed groove part is sleeved outside the front end bearing. A second recessed groove part is connected to the first recessed groove part, the opening directions of the first recessed groove part and the second recessed groove part are opposite, the opening of the second recessed groove part faces the front end of the motor shaft, the groove bottom of the second recessed groove part is provided with a circulation hole, and the filtering module is embedded in the second recessed groove part.

Description

Technical Field

[0001] This invention belongs to the field of pump technology, and particularly relates to a pump with an internal circulation filter module. Background Technology

[0002] In existing technologies, for canned motor pumps using internal circulation, to ensure the cooling of the canned motor and the lubrication of the bearings and thrust disc, thereby enabling the canned motor to operate normally, a common technical solution is to directly create several through holes in the bearing or bearing housing. The central axis of these through holes is set along the axial direction of the central shaft, and the diameter of these through holes is generally large, i.e., greater than 2 mm, to facilitate the introduction of the medium from the pump chamber into the inner cavity of the canned sleeve. Then, through the hollow motor shaft, the medium is guided from the inner cavity of the canned sleeve back to the pump inlet, achieving energy circulation. The location of the circulation holes has a significant impact on the performance and lifespan of the canned motor pump. Small-diameter circulation holes, i.e., less than 1 mm in diameter, are easily clogged by scale deposits, affecting the water circulation volume within the pump. However, large-diameter circulation holes allow particles or larger impurities to directly enter the canned cavity, causing wear on the pump's internal components and accelerating damage to the canned motor. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a pump with an internal circulation filter protection module. The pump has an internal filter module added at the inlet of the circulation hole to ensure safe operation of the pump and extend its service life.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A pump with an internal circulation filter module includes a front bearing housing and a filter module, the front bearing housing comprising:

[0006] The first groove portion has a shaft mounting hole at its bottom. The motor shaft of the pump passes through the shaft mounting hole, and a front bearing is sleeved on the front end of the motor shaft. The first groove portion is sleeved on the outside of the front bearing.

[0007] The second groove is connected to the first groove. The opening directions of the first groove and the second groove are opposite. The opening of the second groove faces the front end of the motor shaft. A circulation hole is provided at the bottom of the second groove.

[0008] The filter module is embedded in the second groove.

[0009] Preferably, the bottom of the filter module is provided with a flow channel, and the bottom of the flow channel is spaced apart from the bottom surface of the inner side of the second groove by a first preset distance.

[0010] Preferably, the distance between the bottom of the flow channel and the bottom surface of the inner side of the second groove is in the range of 2mm-4mm.

[0011] Preferably, the filtration module includes a rubber elastomer and a filter element, wherein the rubber elastomer is fitted into the second groove and the filter element is disposed within the rubber elastomer.

[0012] Preferably, the rubber elastomer has a mounting hole, and the filter element is disposed in the mounting hole.

[0013] Preferably, the mounting hole includes a first through hole and a second through hole that are interconnected, the diameter of the first through hole is larger than the diameter of the second through hole, the first through hole is located at the front end of the rubber elastomer, and the filter element is disposed in the first through hole and the second through hole.

[0014] Preferably, the filter element includes a first filter section and a second filter section connected to each other, wherein the diameter of the first filter section is larger than the diameter of the second filter section.

[0015] The first filter section is interference-fitted with the first through hole, and the second filter section is interference-fitted with the second through hole.

[0016] Preferably, the rubber elastomer is an annular component, and the rubber elastomer includes a rubber elastic body and a first protrusion disposed on the outer wall of the rubber elastic body.

[0017] Preferably, a second protrusion is provided on the inner wall of the rubber elastic body.

[0018] Preferably, the diameter of the first through hole is in the range of 6mm-7mm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this invention, a filter module is embedded inside the second groove of the front bearing housing. Before the liquid enters the inner cavity of the shielding sleeve, it flows through the filter module, which filters and intercepts impurities larger than a certain particle size, ensuring that the medium meets the cleanliness requirements for entering the internal circulation. In areas with poor water quality, this effectively prevents impurities from entering the inner cavity of the shielding sleeve, thus avoiding problems such as scraping, jamming, and abnormal wear between the shielding sleeve and the stator / rotor. Adding a filter module before the circulation hole ensures the safe operation of the canned pump and extends its service life. Furthermore, the filter module can be periodically replaced and maintained, thereby protecting the pump. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the internal structure of the pump with an internal circulation filter device in this invention;

[0022] Figure 2 This is a cross-sectional view of the front bearing housing and the filter module in this invention;

[0023] Figure 3 This is a schematic diagram of the front bearing housing and filter module in this invention;

[0024] Figure 4 This is a cross-sectional view of the front bearing housing in this invention;

[0025] Figure 5 This is a schematic diagram of the filter module in this invention from a first angle;

[0026] Figure 6 This is a schematic diagram of the filter module in this invention from a second angle;

[0027] Figure 7 This is a cross-sectional view of the filtering module in this invention;

[0028] Figure 8 This is a schematic diagram of the structure of the rubber elastomer in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the filter element in this invention;

[0030] Figure 10 This is a front view of the filter element in this invention.

[0031] Among them, 10 is the inner cavity of the shielding sleeve; 1 is the front bearing seat; 11 is the first groove; 12 is the second groove; and 120 is the circulation hole.

[0032] 2. Filter module; 20. Flow channel; 21. Rubber elastomer; 210. Mounting hole; 2101. First through hole; 2102. Second through hole; 211. Rubber elastomer body; 212. First protrusion; 213. Second protrusion; 22. Filter element; 221. First filter section; 222. Second filter section; 3. Front bearing. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figures 1-10 As shown, this embodiment provides a pump with an internal circulation filter device, including a front bearing housing 1 and a filter module 2, which is disposed on the front bearing housing 1 of the pump. The front bearing housing 1 includes a first groove 11 and a second groove 12. A shaft mounting hole is opened at the bottom of the first groove 11, and the motor shaft of the pump passes through the shaft mounting hole. A front bearing 3 is sleeved on the front end of the motor shaft, and the first groove 11 is sleeved on the front bearing 3.

[0041] The second groove 12 is connected to the first groove 11, and the opening directions of the first groove 11 and the second groove 12 are opposite. Specifically, the opening of the first groove 11 faces the rear end of the motor shaft, and the opening of the second groove 12 faces the front end of the motor shaft. A circulation hole 120 is provided at the bottom of the second groove 12. The filter module 2 is embedded in the second groove 12. Liquid enters from the water pump inlet, passes through the filter module 2 and the circulation hole 120, and then flows into the inner cavity 10 of the shielding sleeve. Afterward, the liquid enters the hollow cavity of the motor shaft through the pump tail and finally flows back to the pump outlet. Figure 1 The direction of water flow shown.

[0042] The "front end" of the motor shaft mentioned above does not refer to the front end face of the motor shaft, but rather to a position close to the front end face of the motor shaft, such as... Figure 1 The location is shown. Additionally, the term "front end" refers to the end where the pump's inlet and outlet are located, while the end where the motor is located is the pump's rear end. "Front end" and "rear end" are only relative terms.

[0043] In this embodiment, a filter module 2 is embedded inside the second groove 12 of the front bearing housing 1. Before the liquid enters the inner cavity 10 of the shielding sleeve, it flows through the filter module 2. The filter module 2 can filter the liquid to intercept impurity particles larger than a certain size, ensuring that the medium meets the cleanliness requirements for entering the internal circulation. For areas with poor water quality, it can effectively prevent problems such as scraping, jamming, and abnormal wear between the shielding sleeve and the stator and rotor caused by impurities entering the inner cavity 10 of the shielding sleeve. The addition of the filter module 2 before the circulation hole 120 ensures the safe operation of the shielded pump and extends the service life of the pump. At the same time, the filter module 2 can also be replaced and maintained regularly, thereby protecting the pump.

[0044] Preferably, the front bearing housing 1 and the front bearing 3 are interference-fitted.

[0045] Preferably, the bottom of the filter module 2 is provided with a flow channel 20, and the bottom of the flow channel 20 is spaced apart from the bottom surface of the inner side of the second groove 12 by a first preset distance D. This ensures that after the liquid passes through the filter module 2, there is a certain gap between the filter module 2 and the bottom surface of the inner side of the second groove 12, allowing the liquid to pass through smoothly and reducing the flow resistance of the liquid.

[0046] Preferably, the flow channel 20 is arranged in a ring around the circumference of the filter module 2. A cavity is formed between the ring-shaped flow channel 20 and the bottom surface of the inner side of the second recess 12 to facilitate smooth liquid flow. Simultaneously, the liquid is evenly distributed within the flow channel 20, ensuring consistent liquid flow velocity across all circulation holes 120 and improving pump stability. In other embodiments, the flow channel 20 can also be multiple arc-shaped channels arranged in a circle, each arc-shaped channel forming a cavity with the bottom surface of the inner side of the second recess 12. For example, each arc-shaped channel corresponds to at least one circulation hole 120 to allow liquid flow.

[0047] Preferably, the distance between the bottom of the annular flow channel 20 and the bottom surface of the inner side of the second groove 12 is 2mm-4mm, so as to ensure that the water can flow fully here without generating excessive resistance.

[0048] Preferably, the filter module 2 includes a rubber elastomer 21 and a filter element 22. The rubber elastomer 21 is fitted into the second groove 12, and the filter element 22 is embedded within the rubber elastomer 21. The filter element 22 is fixed to the rubber elastomer 21. Simultaneously, the water pressure at the front end of the rubber elastomer 21 is greater than that at the rear end. The rubber elastomer 21, under the pressure of the water flow, undergoes a certain deformation, protecting the filter element 22 from deformation and thus ensuring the filtration effect is not affected. Furthermore, the impact of the water flow applies pressure to the front end of the rubber elastomer 21, causing it to deform. This results in a tighter fit between the rubber elastomer 21 and the second groove 12, preventing the rubber elastomer 21 and filter element 22 from falling off during pump operation.

[0049] Preferably, the rubber elastomer 21 has a mounting hole 210, and the filter element 22 is embedded in the mounting hole 210. For example, the filter element 22 and the mounting hole 210 are interference-fitted. Under the impact of the water flow, the rubber elastomer 21 deforms to a certain extent, resulting in a tighter fit between the rubber elastomer 21 and the filter element 22.

[0050] In this embodiment, the mounting hole 210 is a through hole or a stepped through hole. Regarding the shape of the mounting hole 210, it can be a square hole, a round hole, or a hole of other shapes. For example, there are multiple filter elements 22, and the shape of the filter element 22 corresponds one-to-one with the shape of the mounting hole 210, and the size of the filter element 22 corresponds one-to-one with the size of the mounting hole 210.

[0051] Preferably, the mounting hole 210 includes a first through hole 2101 and a second through hole 2102 that are interconnected. The diameter of the first through hole 2101 is larger than the diameter of the second through hole 2102. The first through hole 2101 is located at the front end of the rubber elastomer 21, and the filter element 22 is disposed within the first through hole 2101 and the second through hole 2102. In this embodiment, more preferably, the filter element 22 includes a first filter section 221 and a second filter section 222 that are interconnected. The diameter of the first filter section 221 is larger than the diameter of the second filter section 222. The first filter section 221 is disposed in the first through hole 2101, and the second filter section 222 is disposed in the second through hole 2102. The first filter section 221 is press-fitted with the first through hole 2101, and the second filter section 222 is press-fitted with the second through hole 2102. This ensures that the filter element 22 will not fall out of the rubber elastomer 21. At the same time, the filter element 22 and the rubber elastomer 21 are well sealed, and impurities will not enter the inner cavity 10 of the shielding sleeve through the gap between them.

[0052] Regarding the specific structure of the aforementioned rubber elastomer 21, the rubber elastomer 21 is an annular component, comprising a rubber elastic body 211 and a first protrusion 212, the first protrusion 212 being disposed on the outer wall of the rubber elastic body 211. The first protrusion 212 is provided to ensure close contact with the aforementioned second groove portion 12, preventing the rubber elastomer 21 from falling out of the second groove portion 12.

[0053] Preferably, the rubber elastomer 21 is an annular component, and a second protrusion 213 is provided on the inner wall of the rubber elastomer body 211. The first protrusion 212 and the second protrusion 213 are provided to make close contact with the side wall of the second groove portion 12 to prevent the rubber elastomer 21 from falling out of the second groove portion 12.

[0054] Preferably, the first protrusion 212 is annularly disposed on the body of the rubber elastomer 21. There are at least two sets of the first protrusion 212. Specifically, there are two sets of the first protrusion 212, arranged side-by-side in parallel.

[0055] More preferably, the second protrusion 213 is annularly disposed on the body of the rubber elastomer 21. There are at least two sets of the second protrusion 213. Specifically, there are two sets of the second protrusion 213, arranged side-by-side and parallel to each other.

[0056] The positions of the first protrusion 212 and the second protrusion 213 can be selected according to actual needs. A second preset distance is spaced between two adjacent sets of first protrusions 212. A third preset distance is spaced between two adjacent sets of second protrusions 213. The second and third preset distances can be selected and determined according to actual needs. At least two sets of first protrusions 212 and at least two sets of second protrusions 213 are provided to ensure that the contact area with the inner wall of the second groove 12 is increased through the first and second protrusions 212 and 213. During operation, the rubber elastomer 21 works stably and is not easily detached.

[0057] Preferably, the outer wall of the rubber elastic body 211 matches the shape of the side wall of the second groove portion 12. The outer wall of the rubber elastic body 211 is a conical surface.

[0058] Preferably, the filter element 22 is made of sintered copper or foamed plastic. This material has a filtration and interception function. The filter material is selected from sintered copper or ceramic and designed within the rubber elastomer 21, ensuring a reliable seal and effective interception.

[0059] Preferably, the diameter of the first through hole 2101 is in the range of 6mm-7mm.

[0060] Preferably, the filter element 22 is evenly distributed along the circumference of the rubber elastomer 21.

[0061] Preferably, there are four sets of filter elements 22. The number of filter elements 22 can be increased or decreased according to actual needs to ensure the service life of the filter module 2 and improve the filtration capacity.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pump with an internal circulation filter module, characterized in that, The front bearing housing (1) includes a front bearing housing (1) and a filter module (2), wherein the front bearing housing (1) includes: The first groove (11) has a shaft mounting hole at its bottom. The motor shaft of the pump passes through the shaft mounting hole. The front end of the motor shaft is fitted with a front bearing (3). The first groove (11) is fitted outside the front bearing (3). The second groove (12) is connected to the first groove (11). The opening directions of the first groove (11) and the second groove (12) are opposite. The opening of the second groove (12) faces the front end of the motor shaft. A circulation hole (120) is provided at the bottom of the groove of the second groove (12). The filter module (2) is embedded in the second groove (12); The filter module (2) includes a rubber elastomer (21) and a filter element (22). The rubber elastomer (21) is fitted into the second groove (12), and the filter element (22) is disposed within the rubber elastomer (21). The rubber elastomer (21) has a mounting hole (210), and the filter element (22) is disposed in the mounting hole (210); The mounting hole (210) includes a first through hole (2101) and a second through hole (2102) that are interconnected. The diameter of the first through hole (2101) is larger than the diameter of the second through hole (2102). The first through hole (2101) is located at the front end of the rubber elastomer (21). The filter element (22) is disposed in the first through hole (2101) and the second through hole (2102).

2. The pump with an internal circulation filter module according to claim 1, characterized in that, The bottom of the filter module (2) is provided with a flow groove (20), and the bottom of the flow groove (20) is spaced apart from the bottom surface of the inner side of the second groove (12) by a first preset distance.

3. The pump with an internal circulation filter module according to claim 2, characterized in that, The distance between the bottom of the flow channel (20) and the bottom surface of the inner side of the second groove (12) is in the range of 2mm-4mm.

4. The pump with an internal circulation filter module according to claim 1, characterized in that, The filter element (22) includes a first filter section (221) and a second filter section (222) connected to each other, wherein the diameter of the first filter section (221) is larger than the diameter of the second filter section (222); The first filter section (221) is interference-fitted with the first through hole (2101), and the second filter section (222) is interference-fitted with the second through hole (2102).

5. The pump with an internal circulation filter module according to claim 1, characterized in that, The rubber elastomer (21) is an annular component, and the rubber elastomer (21) includes a rubber elastic body (211) and a first protrusion (212) disposed on the outer wall of the rubber elastic body (211).

6. The pump with an internal circulation filter module according to claim 5, characterized in that, The inner wall of the rubber elastic body (211) is provided with a second protrusion (213).

7. The pump with an internal circulation filter module according to claim 1, characterized in that, The diameter of the first through hole (2101) is in the range of 6mm-7mm.

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