A pump with an internal circulation filtering protection module

Abstract

The present invention belongs to the field of pump technology, and provides a pump with an internal circulation filtering module comprising a front bearing housing and a filtering module, wherein the front bearing housing comprises a first groove part and a second groove part, wherein the bottom of the first groove part is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing, and the first groove part is fitted outside the front bearing; the second groove part is connected to the first groove part, and the opening directions of the first groove part and the second groove part are opposite, the opening of the second groove part faces the front end of the motor shaft, and the bottom of the second groove part is provided with a circulation hole; and the filtering module is embedded in the second groove part.

Description

Technical Field

[0001] The present invention belongs to the field of pump technology, and in particular relates to a pump with an internal circulation filtering module.Background

[0002] In the prior art, for the shielded pump using internal circulation, in order to ensure the cooling of the shielded motor and the lubrication of the bearing and thrust plate, thus to make the shielded motor work normally, the generally employed technical solution is to directly open several through holes on the bearing or bearing housing, with the center axis of the through hole arranged along the axial direction of the central axis. The diameter of the through hole is generally large, that is, the diameter dimension is greater than 2 mm, in order to facilitate the introduction of the medium in the pump cavity into the inner cavity of the shielding sleeve. Afterwards, through the hollow motor shaft, the medium is introduced from the inner cavity of the shielding sleeve back to the inlet of the pump to achieve energy circulation. The provision of the circulation hole has a significant impact on the performance and life of the shielded pump. The circulation hole with a small diameter, that is, the diameter dimension is less than 1 mm, is easily blocked by scale deposition, affecting the circulation volume of water in the pump. However, the circulation hole with a large diameter may also cause particles or large impurities to directly enter the inner cavity of the shielding sleeve, causing wear to the pump's interior and accelerating damage to the motor of the shielded pump.Summary of Invention

[0003] In view of the deficiencies of the prior art, the object of the present invention is to provide a pump with an internal circulation filtering protection module, in which a filtering module is added at the inlet of the circulation hole to ensure the safe operation and extend the service life of the pump.

[0004] To achieve this object, the present invention adopts the following technical solutions: A pump with an internal circulation filtering module comprising a front bearing housing and a filtering module, wherein the front bearing housing comprises: a first groove part, wherein the bottom of the first groove part is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing, and the first groove part is fitted outside the front bearing; a second groove part, which is connected to the first groove part, wherein the opening directions of the first groove part and the second groove part are opposite, the opening of the second groove part faces the front end of the motor shaft, and the bottom of the second groove part is provided with a circulation hole; and the filtering module is embedded in the second groove part.

[0005] Preferably, the bottom of the filtering module is provided with a flow channel, and the bottom of the flow channel is spaced a first predetermined distance from the inner bottom surface of the second groove part.

[0006] Preferably, the distance between the bottom of the flow channel and the inner bottom surface of the second groove part ranges from 2 mm to 4 mm.

[0007] Preferably, the filtering module comprises a rubber elastomer and a filtering element, wherein the rubber elastomer is clamped in the second groove part, and the filtering element is disposed inside the rubber elastomer.

[0008] Preferably, the rubber elastomer is provided with an installation hole, and the filtering element is disposed in the installation hole.

[0009] Preferably, the installation hole comprises a first through hole and a second through hole that are in communication with each other, the diameter of the first through hole is larger than that of the second through hole, the first through hole is located at the front end of the rubber elastomer, and the filtering element is disposed in the first through hole and the second through hole.

[0010] Preferably, the filtering element comprises a first filtering section and a second filtering section connected to each other, and the diameter of the first filtering section is larger than that of the second filtering section;

[0011] the first filtering section is in interference fit with the first through hole, and the second filtering section is in interference fit with the second through hole.

[0012] Preferably, the rubber elastomer is an annular member, and the rubber elastomer comprises a rubber elastic body and a first protrusion disposed on the outer wall of the rubber elastic body.

[0013] Preferably, a second protrusion is disposed on the inner wall of the rubber elastic body.

[0014] Preferably, the diameter of the first through hole ranges from 6 mm to 7 mm.

[0015] Compared with the prior art, the present invention has the following advantageous effects: In the present invention, a filtering module is embedded in the second groove of the front bearing housing. Before the liquid enters the inner cavity of the shielding sleeve, it will flow through the filtering module, which can filter and intercept the liquid to intercept impurities above a certain particle size, ensuring that the medium can meet the cleanliness requirements for entering the internal circulation. For areas with poor water quality, it can effectively avoid problems such as scraping, getting struck, and abnormal wear between the shielding sleeve and the stator and rotor caused by impurities entering the inner cavity of the shielding sleeve. Adding a filtering module before the circulation hole can ensure the safe operation of the shielded pump and extend the service life thereof. At the same time, the filtering module can also be replaced and maintained regularly to achieve the protective effect of the pump.Brief Description of the Drawings

[0016] FIG. 1 is a structural schematic diagram of the interior of a pump with an internal circulation filtering device of the present invention; FIG. 2 is a sectional view of the front bearing housing and the filtering module of the present invention; FIG. 3 is a structural schematic diagram of the front bearing housing and the filtering module of the present invention; FIG. 4 is a sectional view of the front bearing housing of the present invention; FIG. 5 is a structural schematic diagram of the filtering module of the present invention from a first perspective; FIG. 6 is a structural schematic diagram of the filtering module of the present invention from a second perspective; FIG. 7 is a sectional view of the filtering module of the present invention; FIG. 8 is a structural schematic diagram of the rubber elastomer of the present invention; FIG. 9 is a structural schematic diagram of the filtering element of the present invention; and FIG. 10 is a front view of the filtering element of the present invention.

[0017] Wherein, 10: inner cavity of the shielding sleeve; 1: front bearing housing; 11: first groove part; 12: second groove part; and 120: circulation hole; 2: filtering module; 20: flow channel; 21: rubber elastomer; 210: installation hole; 2101: first through hole; 2102: second through hole; 211: rubber elastic body; 212: first protrusion; 213: second protrusion; 22: filtering element; 221: first filtering section; and 222: second filtering section; and 3: front bearing. Description of Specific Embodiments

[0018] In order to make the object, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numbers and letters indicate similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is commonly used when using the product of the present invention. This is only for the convenience of describing the present invention and simplifying the description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and so on are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise stated, the meaning of "multiple" is two or more.

[0022] In the description of the present invention, it is also noted that unless otherwise explicitly specified and limited, the terms "dispose" and "connect" should be broadly understood. For example, they may be fixed connections, removable connections, or integrated connections; they may be mechanical connections or electrical connections. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood based on specific circumstances.

[0023] In the present invention, unless otherwise specified and defined, the first feature "above" or "below" the second feature can include the first feature directly contacting with the second feature or can include the first feature contacting with the second feature through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature include the first feature directly above and obliquely above the second feature, or simply indicate that the horizontal height of the first feature is higher than that of the second feature. Moreover, the first feature "below", "under" and "underneath" the second feature include the first feature directly below and obliquely below the second feature, or simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent 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 cannot be understood as limitations on the present invention.

[0025] As shown in FIGs. 1 to 10, the embodiment provides a pump with an internal circulation filtering device comprising a front bearing housing 1and a filtering module 2 disposed on the front bearing housing 1 of the pump, wherein the front bearing housing 1 comprises a first groove part 11 and a second groove part 12, the bottom of the first groove part 11 is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing 3, and the first groove part 11 is fitted with the front bearing 3.

[0026] The second groove part 12 is connected to the first groove part 11, wherein the opening directions of the first groove part 11 and the second groove part 12 are opposite. Specifically, the opening of the first groove part 11 faces the rear end of the motor shaft, and the opening of the second groove part 12 faces the front end of the motor shaft. The bottom of the second groove part 12 is provided with a circulation hole 120, and the filtering module 2 is embedded in the second groove part 12. The liquid enters from the inlet of the pump, passes through the filtering module 2, and flows through the circulation hole 120 into the inner cavity 10 of the shielding sleeve. Then, the liquid enters the hollow cavity of the motor shaft through the pump tail, and finally flows back to the outlet of the pump. The direction of water flow is shown in FIG. 1.

[0027] Wherein, the front end of the motor shaft described above does not refer to the front end face of the motor shaft, but rather to the position near the front end face of the motor shaft, as shown in FIG. 1. In addition, the "front end" described above refers to the end of the pump where the inlet and outlet are located, while the other end where the motor is located is the "rear end" of the pump. The terms "front end" and "rear end" are relative terms.

[0028] In this embodiment, a filtering module 2 is embedded in the second groove 12 of the front bearing housing 1. Before the liquid enters the inner cavity 10 of the shielding sleeve, it will flow through the filtering module 2, which can filter the liquid to intercept impurities above a certain particle size, ensuring that the medium can meet the cleanliness requirements for entering the internal circulation. For areas with poor water quality, it can effectively avoid problems such as scraping, getting struck, and abnormal wear between the shielding sleeve and the stator and rotor caused by impurities entering the inner cavity 10 of the shielding sleeve. Adding a filtering module 2 before the circulation hole 120 ensures the safe operation of the shielded pump and extends the service life thereof. At the same time, the filtering module 2 can also be replaced and maintained regularly to achieve the protective effect of the pump.

[0029] Preferably, the front bearing housing 1 and the front bearing 3 are assembled with interference fit.

[0030] Preferably, the bottom of the filtering module 2 is provided with a flow channel 20, and the bottom of the flow channel 20 is spaced a first predetermined distance D from the inner bottom surface of the second groove part 12. This ensures that after the liquid passes through the filtering module 2, there is a certain gap between the filtering module 2 and the inner bottom surface of the second groove part 12, allowing the liquid to pass smoothly and reducing the flow resistance of the liquid.

[0031] Preferably, the flow channel 20 is arranged in a ring-shape along the circumferential direction of the filtering module 2, and a cavity is formed between the ring-shape flow channel 20 and the inner bottom surface of the second groove part 12 to facilitate smooth flow of liquid. At the same time, the liquid is evenly distributed in the flow channel 20, so that the liquid flow rate of each circulation hole 120 can be kept consistent, improving the stability of the pump. In other embodiments, the flow channel 20 can also be a plurality of circular arc channel arranged along a circle, a cavity is formed between each circular arc channel and the inner bottom surface of the second groove part 12. For example, each circular arc channel corresponds to at least one circulation hole 120 to allow liquid flow.

[0032] Preferably, the distance between the bottom of the ring-shape flow channel 20 above and the bottom surface of the inner side of the second groove part 12 ranges from 2 mm to 4 mm, to ensure that the water flow can fully flow here without generating excessive resistance.

[0033] Preferably, the filtering module 2 comprises a rubber elastomer 21 and a filtering element 22, wherein the rubber elastomer 21 is clamped in the second groove part 12, and the filtering element 22 is disposed inside the rubber elastomer 21. The fixed filtering element 22 of the rubber elastomer 21 is provided, while the water pressure at the front end of the rubber elastomer 21 is greater than that at the rear end. The rubber elastomer 21 bears the pressure of water flow, which will cause certain deformation, protecting the internal filtering element 22 from deformation, and thus not affecting the filtering effect. In addition, due to the impact of water flow, a certain pressure is applied to the front end of the rubber elastomer 21. After the rubber elastomer 21 is deformed to a certain extent, the rubber elastomer 21 and the second groove part 12 are more tightly installed, and the rubber elastomer 21 and the filtering element 22 will not fall off during the operation of the pump.

[0034] Preferably, the rubber elastomer 21 is provided with an installation hole 210, and the filtering element 22 is embedded in the installation hole 210. For example, the filtering element 22 is in interference fit with the installation hole 210. The rubber elastomer 21 deforms to a certain extent under the impact of water flow, and the rubber elastomer 21 and the filtering element 22 are assembled more tightly.

[0035] The installation hole 210 in this embodiment is a through hole or a stepped through hole. Regarding the shape of the installation hole 210, the installation hole 210 can be a square hole, a round hole, or holes of other shapes. For example, the number of filtering elements 22 can be multiple, and the shape of the filtering elements 22 correspond one-to-one to the shape of the installation hole 210. The size of the filtering elements 22 correspond one-to-one to the size of the installation hole 210.

[0036] Preferably, the installation hole 210 comprises a first through hole 2101 and a second through hole 2102 that are in communication with each other, the diameter of the first through hole 2101 is larger than that of the second through hole 2102, the first through hole 2101 is located at the front end of the rubber elastomer 21, and the filtering element 22 is disposed in the first through hole 2101 and the second through hole 2102. In this embodiment, it is further preferred that the filtering element 22 includes a first filtering section 221 and a second filtering section 222 that are connected to each other, the diameter of the first filtering section 221 is larger than that of the second filtering section 222, the first filtering section 221 is disposed in the first through hole 2101, and the second filtering section 222 is disposed in the second through hole 2102. the first filtering section 221 is in interference fit with the first through hole 2101, and the second filtering section 222 is in interference fit with the second through hole 2102. This ensures that the filtering element 22 will not fall out of the rubber elastomer 21. At the same time, there is a good seal between the filtering element 22 and the rubber elastomer 21, and impurities will not pass through the gap between them into the inner cavity 10 of the shielding sleeve.

[0037] Regarding the specific structure of the rubber elastomer 21, the rubber elastomer 21 is an annular member, and the rubber elastomer 21 includes a rubber elastic body 211 and a first protrusion 212. The first protrusion 212 is disposed on the outer wall of the rubber elastic body 211. The first protrusion 212 is provided to closely contact with the second groove part 12, to preventing the rubber elastomer 21 from falling out of the second groove part 12.

[0038] Preferably, the rubber elastomer 21 is an annular member, and a second protrusion 213 is disposed on the inner wall of the rubber elastic body 211. The first protrusion 212 and the second protrusion 213 is provided to closely contact with the side walls of the second groove part 12 to prevent the rubber elastomer 21 from falling out of the second groove part 12.

[0039] Preferably, the first protrusions 212 are arranged around the body of the rubber elastomer 21. There are at least two groups of the first protrusions 212. Specifically, there are two groups of the first protrusions 212, and the two groups of first protrusions 212 are arranged in parallel.

[0040] Further preferably, the second protrusions 213 are arranged around the body of the rubber elastomer 21. There are at least two groups of the second protrusions 213. Specifically, there are two groups of the second protrusions 213, and the two groups of second protrusions 213 are arranged in parallel.

[0041] The positions of the first protrusions 212 and the second protrusions 213 can be selected according to actual needs. The adjacent two groups of first protrusions 212 are separated by a second predetermined distance. The adjacent two groups of second protrusions 213 are separated by a third predetermined distance, and the second predetermined distance and the third predetermined distance can be selected according to actual needs. At least two groups of first protrusions 212 and at least two groups of second protrusions 213 are provided to ensure that the area of contact with the inner wall of the second groove part 12 is increased through the first protrusions 212 and the second protrusions 213. During operation, the rubber elastomer 21 works stably and is not prone to falling off.

[0042] Preferably, the outer wall of the rubber elastic body 211 matches the shape of the side wall of the second groove part 12. The outer wall of the rubber elastic body 211 is a conical surface.

[0043] Preferably, the material of the filtering element 22 is sintered copper or foamed plastic. Such a material has a filtering and intercepting function. The filtering material is selected from sintered copper or ceramic materials and is disposed within the rubber elastomer 21, providing reliable sealing and effective interception.

[0044] Preferably, the diameter of the first through hole 2101 ranges from 6 mm to 7 mm.

[0045] Preferably, the filter elements 22 are evenly distributed along the circumferential direction of the rubber elastomer 21.

[0046] Preferably, there are four groups of filtering elements 22. The number of these filtering elements 22 can be increased or reduced according to actual needs to ensure the service life of the filtering module 2 and enhance the filtering capability thereof.

[0047] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention and are not limitations on the implementation of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary or possible to exhaust all the implementation methods. 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.

Examples

Embodiment Construction

[0018]In order to make the object, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0019]Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary ...

Technical Field

[0001] The present invention belongs to the field of pump technology, and in particular relates to a pump with an internal circulation filtering module.Background

[0002] In the prior art, for the shielded pump using internal circulation, in order to ensure the cooling of the shielded motor and the lubrication of the bearing and thrust plate, thus to make the shielded motor work normally, the generally employed technical solution is to directly open several through holes on the bearing or bearing housing, with the center axis of the through hole arranged along the axial direction of the central axis. The diameter of the through hole is generally large, that is, the diameter dimension is greater than 2 mm, in order to facilitate the introduction of the medium in the pump cavity into the inner cavity of the shielding sleeve. Afterwards, through the hollow motor shaft, the medium is introduced from the inner cavity of the shielding sleeve back to the inlet of the pump to achieve energy circulation. The provision of the circulation hole has a significant impact on the performance and life of the shielded pump. The circulation hole with a small diameter, that is, the diameter dimension is less than 1 mm, is easily blocked by scale deposition, affecting the circulation volume of water in the pump. However, the circulation hole with a large diameter may also cause particles or large impurities to directly enter the inner cavity of the shielding sleeve, causing wear to the pump's interior and accelerating damage to the motor of the shielded pump.Summary of Invention

[0003] In view of the deficiencies of the prior art, the object of the present invention is to provide a pump with an internal circulation filtering protection module, in which a filtering module is added at the inlet of the circulation hole to ensure the safe operation and extend the service life of the pump.

[0004] To achieve this object, the present invention adopts the following technical solutions: A pump with an internal circulation filtering module comprising a front bearing housing and a filtering module, wherein the front bearing housing comprises: a first groove part, wherein the bottom of the first groove part is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing, and the first groove part is fitted outside the front bearing; a second groove part, which is connected to the first groove part, wherein the opening directions of the first groove part and the second groove part are opposite, the opening of the second groove part faces the front end of the motor shaft, and the bottom of the second groove part is provided with a circulation hole; and the filtering module is embedded in the second groove part.

[0005] Preferably, the bottom of the filtering module is provided with a flow channel, and the bottom of the flow channel is spaced a first predetermined distance from the inner bottom surface of the second groove part.

[0006] Preferably, the distance between the bottom of the flow channel and the inner bottom surface of the second groove part ranges from 2 mm to 4 mm.

[0007] Preferably, the filtering module comprises a rubber elastomer and a filtering element, wherein the rubber elastomer is clamped in the second groove part, and the filtering element is disposed inside the rubber elastomer.

[0008] Preferably, the rubber elastomer is provided with an installation hole, and the filtering element is disposed in the installation hole.

[0009] Preferably, the installation hole comprises a first through hole and a second through hole that are in communication with each other, the diameter of the first through hole is larger than that of the second through hole, the first through hole is located at the front end of the rubber elastomer, and the filtering element is disposed in the first through hole and the second through hole.

[0010] Preferably, the filtering element comprises a first filtering section and a second filtering section connected to each other, and the diameter of the first filtering section is larger than that of the second filtering section;

[0011] the first filtering section is in interference fit with the first through hole, and the second filtering section is in interference fit with the second through hole.

[0012] Preferably, the rubber elastomer is an annular member, and the rubber elastomer comprises a rubber elastic body and a first protrusion disposed on the outer wall of the rubber elastic body.

[0013] Preferably, a second protrusion is disposed on the inner wall of the rubber elastic body.

[0014] Preferably, the diameter of the first through hole ranges from 6 mm to 7 mm.

[0015] Compared with the prior art, the present invention has the following advantageous effects: In the present invention, a filtering module is embedded in the second groove of the front bearing housing. Before the liquid enters the inner cavity of the shielding sleeve, it will flow through the filtering module, which can filter and intercept the liquid to intercept impurities above a certain particle size, ensuring that the medium can meet the cleanliness requirements for entering the internal circulation. For areas with poor water quality, it can effectively avoid problems such as scraping, getting struck, and abnormal wear between the shielding sleeve and the stator and rotor caused by impurities entering the inner cavity of the shielding sleeve. Adding a filtering module before the circulation hole can ensure the safe operation of the shielded pump and extend the service life thereof. At the same time, the filtering module can also be replaced and maintained regularly to achieve the protective effect of the pump.Brief Description of the Drawings

[0016] FIG. 1 is a structural schematic diagram of the interior of a pump with an internal circulation filtering device of the present invention; FIG. 2 is a sectional view of the front bearing housing and the filtering module of the present invention; FIG. 3 is a structural schematic diagram of the front bearing housing and the filtering module of the present invention; FIG. 4 is a sectional view of the front bearing housing of the present invention; FIG. 5 is a structural schematic diagram of the filtering module of the present invention from a first perspective; FIG. 6 is a structural schematic diagram of the filtering module of the present invention from a second perspective; FIG. 7 is a sectional view of the filtering module of the present invention; FIG. 8 is a structural schematic diagram of the rubber elastomer of the present invention; FIG. 9 is a structural schematic diagram of the filtering element of the present invention; and FIG. 10 is a front view of the filtering element of the present invention.

[0017] Wherein, 10: inner cavity of the shielding sleeve; 1: front bearing housing; 11: first groove part; 12: second groove part; and 120: circulation hole; 2: filtering module; 20: flow channel; 21: rubber elastomer; 210: installation hole; 2101: first through hole; 2102: second through hole; 211: rubber elastic body; 212: first protrusion; 213: second protrusion; 22: filtering element; 221: first filtering section; and 222: second filtering section; and 3: front bearing. Description of Specific Embodiments

[0018] In order to make the object, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numbers and letters indicate similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is commonly used when using the product of the present invention. This is only for the convenience of describing the present invention and simplifying the description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and so on are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise stated, the meaning of "multiple" is two or more.

[0022] In the description of the present invention, it is also noted that unless otherwise explicitly specified and limited, the terms "dispose" and "connect" should be broadly understood. For example, they may be fixed connections, removable connections, or integrated connections; they may be mechanical connections or electrical connections. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood based on specific circumstances.

[0023] In the present invention, unless otherwise specified and defined, the first feature "above" or "below" the second feature can include the first feature directly contacting with the second feature or can include the first feature contacting with the second feature through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature include the first feature directly above and obliquely above the second feature, or simply indicate that the horizontal height of the first feature is higher than that of the second feature. Moreover, the first feature "below", "under" and "underneath" the second feature include the first feature directly below and obliquely below the second feature, or simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent 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 cannot be understood as limitations on the present invention.

[0025] As shown in FIGs. 1 to 10, the embodiment provides a pump with an internal circulation filtering device comprising a front bearing housing 1and a filtering module 2 disposed on the front bearing housing 1 of the pump, wherein the front bearing housing 1 comprises a first groove part 11 and a second groove part 12, the bottom of the first groove part 11 is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing 3, and the first groove part 11 is fitted with the front bearing 3.

[0026] The second groove part 12 is connected to the first groove part 11, wherein the opening directions of the first groove part 11 and the second groove part 12 are opposite. Specifically, the opening of the first groove part 11 faces the rear end of the motor shaft, and the opening of the second groove part 12 faces the front end of the motor shaft. The bottom of the second groove part 12 is provided with a circulation hole 120, and the filtering module 2 is embedded in the second groove part 12. The liquid enters from the inlet of the pump, passes through the filtering module 2, and flows through the circulation hole 120 into the inner cavity 10 of the shielding sleeve. Then, the liquid enters the hollow cavity of the motor shaft through the pump tail, and finally flows back to the outlet of the pump. The direction of water flow is shown in FIG. 1.

[0027] Wherein, the front end of the motor shaft described above does not refer to the front end face of the motor shaft, but rather to the position near the front end face of the motor shaft, as shown in FIG. 1. In addition, the "front end" described above refers to the end of the pump where the inlet and outlet are located, while the other end where the motor is located is the "rear end" of the pump. The terms "front end" and "rear end" are relative terms.

[0028] In this embodiment, a filtering module 2 is embedded in the second groove 12 of the front bearing housing 1. Before the liquid enters the inner cavity 10 of the shielding sleeve, it will flow through the filtering module 2, which can filter the liquid to intercept impurities above a certain particle size, ensuring that the medium can meet the cleanliness requirements for entering the internal circulation. For areas with poor water quality, it can effectively avoid problems such as scraping, getting struck, and abnormal wear between the shielding sleeve and the stator and rotor caused by impurities entering the inner cavity 10 of the shielding sleeve. Adding a filtering module 2 before the circulation hole 120 ensures the safe operation of the shielded pump and extends the service life thereof. At the same time, the filtering module 2 can also be replaced and maintained regularly to achieve the protective effect of the pump.

[0029] Preferably, the front bearing housing 1 and the front bearing 3 are assembled with interference fit.

[0030] Preferably, the bottom of the filtering module 2 is provided with a flow channel 20, and the bottom of the flow channel 20 is spaced a first predetermined distance D from the inner bottom surface of the second groove part 12. This ensures that after the liquid passes through the filtering module 2, there is a certain gap between the filtering module 2 and the inner bottom surface of the second groove part 12, allowing the liquid to pass smoothly and reducing the flow resistance of the liquid.

[0031] Preferably, the flow channel 20 is arranged in a ring-shape along the circumferential direction of the filtering module 2, and a cavity is formed between the ring-shape flow channel 20 and the inner bottom surface of the second groove part 12 to facilitate smooth flow of liquid. At the same time, the liquid is evenly distributed in the flow channel 20, so that the liquid flow rate of each circulation hole 120 can be kept consistent, improving the stability of the pump. In other embodiments, the flow channel 20 can also be a plurality of circular arc channel arranged along a circle, a cavity is formed between each circular arc channel and the inner bottom surface of the second groove part 12. For example, each circular arc channel corresponds to at least one circulation hole 120 to allow liquid flow.

[0032] Preferably, the distance between the bottom of the ring-shape flow channel 20 above and the bottom surface of the inner side of the second groove part 12 ranges from 2 mm to 4 mm, to ensure that the water flow can fully flow here without generating excessive resistance.

[0033] Preferably, the filtering module 2 comprises a rubber elastomer 21 and a filtering element 22, wherein the rubber elastomer 21 is clamped in the second groove part 12, and the filtering element 22 is disposed inside the rubber elastomer 21. The fixed filtering element 22 of the rubber elastomer 21 is provided, while the water pressure at the front end of the rubber elastomer 21 is greater than that at the rear end. The rubber elastomer 21 bears the pressure of water flow, which will cause certain deformation, protecting the internal filtering element 22 from deformation, and thus not affecting the filtering effect. In addition, due to the impact of water flow, a certain pressure is applied to the front end of the rubber elastomer 21. After the rubber elastomer 21 is deformed to a certain extent, the rubber elastomer 21 and the second groove part 12 are more tightly installed, and the rubber elastomer 21 and the filtering element 22 will not fall off during the operation of the pump.

[0034] Preferably, the rubber elastomer 21 is provided with an installation hole 210, and the filtering element 22 is embedded in the installation hole 210. For example, the filtering element 22 is in interference fit with the installation hole 210. The rubber elastomer 21 deforms to a certain extent under the impact of water flow, and the rubber elastomer 21 and the filtering element 22 are assembled more tightly.

[0035] The installation hole 210 in this embodiment is a through hole or a stepped through hole. Regarding the shape of the installation hole 210, the installation hole 210 can be a square hole, a round hole, or holes of other shapes. For example, the number of filtering elements 22 can be multiple, and the shape of the filtering elements 22 correspond one-to-one to the shape of the installation hole 210. The size of the filtering elements 22 correspond one-to-one to the size of the installation hole 210.

[0036] Preferably, the installation hole 210 comprises a first through hole 2101 and a second through hole 2102 that are in communication with each other, the diameter of the first through hole 2101 is larger than that of the second through hole 2102, the first through hole 2101 is located at the front end of the rubber elastomer 21, and the filtering element 22 is disposed in the first through hole 2101 and the second through hole 2102. In this embodiment, it is further preferred that the filtering element 22 includes a first filtering section 221 and a second filtering section 222 that are connected to each other, the diameter of the first filtering section 221 is larger than that of the second filtering section 222, the first filtering section 221 is disposed in the first through hole 2101, and the second filtering section 222 is disposed in the second through hole 2102. the first filtering section 221 is in interference fit with the first through hole 2101, and the second filtering section 222 is in interference fit with the second through hole 2102. This ensures that the filtering element 22 will not fall out of the rubber elastomer 21. At the same time, there is a good seal between the filtering element 22 and the rubber elastomer 21, and impurities will not pass through the gap between them into the inner cavity 10 of the shielding sleeve.

[0037] Regarding the specific structure of the rubber elastomer 21, the rubber elastomer 21 is an annular member, and the rubber elastomer 21 includes a rubber elastic body 211 and a first protrusion 212. The first protrusion 212 is disposed on the outer wall of the rubber elastic body 211. The first protrusion 212 is provided to closely contact with the second groove part 12, to preventing the rubber elastomer 21 from falling out of the second groove part 12.

[0038] Preferably, the rubber elastomer 21 is an annular member, and a second protrusion 213 is disposed on the inner wall of the rubber elastic body 211. The first protrusion 212 and the second protrusion 213 is provided to closely contact with the side walls of the second groove part 12 to prevent the rubber elastomer 21 from falling out of the second groove part 12.

[0039] Preferably, the first protrusions 212 are arranged around the body of the rubber elastomer 21. There are at least two groups of the first protrusions 212. Specifically, there are two groups of the first protrusions 212, and the two groups of first protrusions 212 are arranged in parallel.

[0040] Further preferably, the second protrusions 213 are arranged around the body of the rubber elastomer 21. There are at least two groups of the second protrusions 213. Specifically, there are two groups of the second protrusions 213, and the two groups of second protrusions 213 are arranged in parallel.

[0041] The positions of the first protrusions 212 and the second protrusions 213 can be selected according to actual needs. The adjacent two groups of first protrusions 212 are separated by a second predetermined distance. The adjacent two groups of second protrusions 213 are separated by a third predetermined distance, and the second predetermined distance and the third predetermined distance can be selected according to actual needs. At least two groups of first protrusions 212 and at least two groups of second protrusions 213 are provided to ensure that the area of contact with the inner wall of the second groove part 12 is increased through the first protrusions 212 and the second protrusions 213. During operation, the rubber elastomer 21 works stably and is not prone to falling off.

[0042] Preferably, the outer wall of the rubber elastic body 211 matches the shape of the side wall of the second groove part 12. The outer wall of the rubber elastic body 211 is a conical surface.

[0043] Preferably, the material of the filtering element 22 is sintered copper or foamed plastic. Such a material has a filtering and intercepting function. The filtering material is selected from sintered copper or ceramic materials and is disposed within the rubber elastomer 21, providing reliable sealing and effective interception.

[0044] Preferably, the diameter of the first through hole 2101 ranges from 6 mm to 7 mm.

[0045] Preferably, the filter elements 22 are evenly distributed along the circumferential direction of the rubber elastomer 21.

[0046] Preferably, there are four groups of filtering elements 22. The number of these filtering elements 22 can be increased or reduced according to actual needs to ensure the service life of the filtering module 2 and enhance the filtering capability thereof.

[0047] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention and are not limitations on the implementation of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary or possible to exhaust all the implementation methods. 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.

Examples

Embodiment Construction

[0018]In order to make the object, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0019]Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary ...

Claims

1. A pump with an internal circulation filtering module, characterized by comprising a front bearing housing (1) and a filtering module (2), wherein the front bearing housing (1) comprises: a first groove part (11), wherein the bottom of the first groove part (11) is provided with a shaft mounting hole, the motor shaft of the pump is inserted through the shaft mounting hole, the front end of the motor shaft is fitted with a front bearing (3), and the first groove part (11) is fitted outside the front bearing (3); a second groove part (12), which is connected to the first groove part (11), wherein the opening directions of the first groove part (11) and the second groove part (12) are opposite, the opening of the second groove part (12) faces the front end of the motor shaft, and the bottom of the second groove part (12) is provided with a circulation hole (120); and the filtering module (2) is embedded in the second groove part (12).

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

3. The pump with an internal circulation filtration module according to claim 2, characterized in that, the distance between the bottom of the flow channel (20) and the inner bottom surface of the second groove part (12) ranges from 2 mm to 4 mm.

4. The pump with an internal circulation filtering module according to any one of claims 1 to 3, characterized in that, the filtering module (2) comprises a rubber elastomer (21) and a filtering element (22), wherein the rubber elastomer (21) is clamped in the second groove part (12), and the filtering element (22) is disposed inside the rubber elastomer (21).

5. The pump with an internal circulation filtering module according to claim 4, characterized in that, the rubber elastomer (21) is provided with an installation hole (210), and the filtering element (22) is disposed in the installation hole (210).

6. The pump with an internal circulation filtering module according to claim 5, characterized in that, the installation hole (210) comprises a first through hole (2101) and a second through hole (2102) that are in communication with each other, the diameter of the first through hole (2101) is larger than that of the second through hole (2102), the first through hole (2101) is located at the front end of the rubber elastomer (21), and the filtering element (22) is disposed in the first through hole (2101) and the second through hole (2102).

7. The pump with an internal circulation filtering module according to claim 6, characterized in that, the filtering element (22) comprises a first filtering section (221) and a second filtering section (222) connected to each other, and the diameter of the first filtering section (221) is larger than that of the second filtering section (222); the first filtering section (221) is in interference fit with the first through hole (2101), and the second filtering section (222) is in interference fit with the second through hole (2102).

8. The pump with an internal circulation filtering module according to claim 4, characterized in that, the rubber elastomer (21) is an annular member, and the rubber elastomer (21) comprises a rubber elastic body (211) and a first protrusion (212) disposed on the outer wall of the rubber elastic body (211).

9. The pump with an internal circulation filtering module according to claim 8, characterized in that, a second protrusion (213) is disposed on the inner wall of the rubber elastic body (211).

10. The pump with an internal circulation filtering module according to claim 6, characterized in that, the diameter of the first through hole (2101) ranges from 6 mm to 7 mm.

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