Pump body front end cover, pump body anti-displacement structure and pump

Abstract

The application discloses a pump body front end cover, which comprises a front end cover body with an integrated tensile shaping structure, a pump body limiting ring is formed on the edge of the front end cover body by integrated bending, a pump body matching structure is arranged on the front end cover body in a radial direction to a center direction, and the pump body limiting ring and the pump body matching structure cooperate to form a pump body sealing limiting ring groove. The application further discloses a pump body anti-displacement structure and a pump. The pump body front end cover is made by integrated tensile shaping of the front end cover body, thereby ensuring the accuracy of the size, effectively improving the assembly reliability, and using a material with good anti-rust performance, so that subsequent processing and surface anti-rust treatment are not needed, and long-term effective anti-rust of the front end cover can be realized. The pump body is limited by the pump body limiting ring, so that displacement of the pump body due to water pressure is prevented, and the use performance of the pump is greatly improved. The inner periphery of the pump body front end cover is sealed by the pump body matching structure, so that the sealing effect is ensured, and the strength of the front end cover is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pumps, and in particular to a front end cover of a pump body, a pump body anti-displacement structure, and a pump. Background Art

[0002] In current technology, the front cover or bracket of the pump is mainly made of cast iron, aluminum, and plastic, mainly because these materials are easy to machine and can meet design requirements, and the design thickness is relatively thick, and the overall cost is slightly higher; and the front cover or bracket structure is mainly flat, without outer ring outsourcing and other structures.

[0003] Parts with existing technical structures require processes such as shot blasting, which may cause parts to break, resulting in low efficiency of finished products. At the same time, surface treatment is also required for rust prevention, but the surface of the parts after treatment cannot achieve the purpose of long-term rust resistance, and there is a risk of pollution. In addition, parts are mainly formed by machining, and machined parts have uncontrollable dimensions due to fine-tuning of tools and processes, resulting in problems such as incomplete processing and deformation.

[0004] The most important thing is that the current front cover has no anti-displacement structure, which causes the pump body to be displaced due to water pressure during use, resulting in low performance of the pump. Summary of the Invention

[0005] The purpose of the present invention is to provide a front end cover of the pump body that can effectively prevent the pump body from being displaced by water pressure and affecting the performance of the pump, has good anti-displacement effect, does not require machining and surface anti-rust treatment, and has high dimensional accuracy. At the same time, a pump body anti-displacement structure is provided that can effectively prevent the pump body from being displaced by water pressure and affecting the performance of the pump.

[0006] The technical solution adopted by the present invention to achieve its first invention purpose is: a pump body front end cover, including a front end cover body of an integral stretching and shaping structure, a pump body limiting ring is formed on the edge of the front end cover body by integral bending, a pump body matching structure is provided on the front end cover body along the radial direction toward the center, and the pump body limiting ring cooperates with the pump body matching structure to form a pump body sealing limiting ring groove. The pump body front end cover is manufactured by integral stretching and shaping the front end cover body, so that the front end cover body can be formed in one step, and the dimensional accuracy can be guaranteed to meet the matching requirements with the pump body, effectively improving the reliability of assembly. Through integral stretching and shaping, the manufacturing material can be selected from materials with high precision requirements and good rust resistance, without the need for subsequent processing or surface rust prevention treatment, and the long-term effective rust prevention of the front end cover can be achieved. At the same time, through the integral stretching and shaping of the integrally bent pump body limiting ring, a pump body sealing limiting ring groove is formed between the pump body limiting ring and the pump body matching structure, and the pump body is limited and sealed inside the pump body sealing limiting ring groove. The pump body is limited by the pump body limiting ring to prevent the pump body from displacement due to water pressure, which greatly improves the performance of the pump. The inner circumference of the pump body front end cover is sealed by the pump body matching structure, which not only ensures the sealing effect but also improves the strength of the front end cover. In addition, the pump body front end cover is easy to manufacture, which improves the assembly performance as a whole, thereby improving the reliability of the pump performance.

[0007] Preferably, a reinforcing structure is provided at the bottom of the pump body sealing limiting ring groove to enhance the strength of the front end cover body and extend its service life.

[0008] Preferably, a motor shaft hole is provided at the center of the front end cover body. The motor shaft hole is bent toward the pump body mating structure to form a mechanical seal inner chamber. The mechanical seal inner chamber is bent outward in an L-shape and is recessed to form a guide vane positioning groove. An electric shaft hole is provided at the center of the front end cover body to facilitate the insertion of the motor rotor shaft. At the same time, a mechanical seal inner chamber is formed on one side of the motor shaft hole through stretching and shaping for assembling the mechanical seal. A guide vane positioning groove is provided to position the pump guide vanes, while also enhancing the strength of the front end cover.

[0009] Preferably, an annular mechanical seal outer chamber is formed on the side of the front cover body opposite the mechanical seal inner chamber; a plurality of water flow channels are provided at the bottom of the mechanical seal outer chamber. The side opposite the mechanical seal inner chamber forms a seal outer chamber, which is used to position the motor inner housing and the motor front cover, thereby achieving an integrated design of the motor and pump body.

[0010] Preferably, the pump body limiting ring is tilted toward the center of the front end cover body to form a barbed hook structure, with the ring inclination angle α of the pump body limiting ring being 0 to 5 degrees; the pump body matching structure is tilted toward the center of the front end cover body to form an inclined surface structure, with the inclined surface inclination angle β being 0 to 10 degrees. The pump body limiting ring and the pump body matching structure are arranged at a certain angle to achieve barbed hook position limiting and sealing cooperation, thereby limiting and sealing the pump body, thereby improving the overall performance of the pump.

[0011] The technical solution adopted by the present invention to achieve its second invention purpose is: a pump body anti-displacement structure, including the pump body front end cover and the pump body, the pump body is provided with a double-body structure for cooperating with the pump body sealing limit ring groove, the double-body structure includes an outer limit ring on the outside and an inner pump body sealing ring. The pump body anti-displacement structure realizes the limiting seal by the pump body front end cover and the double-body structure on the pump body. The pump body front end cover cooperates with the double-body structure to realize the limiting function of the pump body and the sealing function, while also improving the use strength, so that the overall performance of the pump is greatly improved.

[0012] Preferably, the external limiting ring cooperates with the pump body limiting ring to form a barbed hook pump body limiting structure, and a pump body displacement control gap is formed between the external limiting ring and the pump body limiting ring. The external limiting ring cooperates with the pump body limiting ring to form a barbed hook pump body limiting structure, which can limit the displacement of the pump body due to water pressure, and also leave a gap for the displacement of the pump body through the pump body displacement control gap, converting the top pressure of the pump body on the front end cover due to water pressure into lateral sliding, thereby controlling the displacement of the pump body to be released inside the pump body limiting ring, thereby preventing the displacement of the pump body from being released due to water pressure and thus affecting the performance of the pump.

[0013] Preferably, the pump body sealing ring includes an annular convex ring and a sealing groove, a gap is formed between the sealing groove and the inner annular surface of the pump body sealing ring, and the end face height of the inner annular surface is smaller than the height of the annular convex ring; a sealing ring is arranged inside the sealing groove. The pump body sealing ring realizes a dual design of limiting cooperation and sealing, that is, through the cooperation of the annular convex ring and the bottom of the pump body sealing limiting ring groove, when the pump body is displaced due to water pressure, the top pressure of the pump body on the front end cover is transferred to a lateral sliding force, thereby limiting the displacement of the pump, and the inner ring surface of the pump body sealing ring cooperates with the pump body matching structure. At the same time, a sealing groove is provided on the pump body sealing ring, and a sealing ring is provided inside the sealing groove to realize the inner sealing of the pump body, and a gap is formed between the sealing groove and the inner ring surface of the pump body sealing ring. The end face height of the inner ring surface is less than the height of the annular convex ring. Such structural cooperation enables the inner ring surface of the pump body to cooperate with the pump body matching structure, while the sealing ring can form a multi-faceted sealing structure in the pump body sealing structure and at the bottom of the pump body sealing limiting ring groove, thereby enhancing the sealing effect of the pump body during the displacement action caused by water pressure.

[0014] Preferably, the outer limiting ring is provided with an inclined mating surface inclined toward the center direction of the front end cover body, and the inclination angle δ of the inclined mating surface is 10 to 20 degrees.

[0015] The technical solution adopted by the present invention to achieve its third invention purpose is: a pump, including the pump body anti-displacement structure, and also including a motor that cooperates with the mechanical seal outer chamber on the front end cover body to form an integrated pump structure, the motor rotor shaft inside the motor passes through the motor shaft hole on the front end cover body and extends into the pump body, and the end of the motor rotor shaft extending into the pump body is provided with an impeller, and the pump body is also provided with a guide vane that forms an impeller cavity with the pump body, and the guide vane cooperates with the guide vane positioning groove. The pump integrates the pump body and the motor into an integrated structure through the front end cover body, and forms a pump body anti-displacement structure through the front end cover of the pump body, which solves the problem that the pump body is displaced due to water pressure and affects the performance of the pump. The front end cover body with an integrated stretching and shaping structure solves the problem that the front end cover of the pump body cannot be rust-proofed for a long time, and while positioning the guide vane through the guide vane positioning groove, the matching strength of the front end cover of the pump body is increased. The overall performance of the pump is greatly improved.

[0016] The beneficial effects of the present invention are as follows: the front end cover of the pump body is produced by integrally stretching and shaping the front end cover body, so that the front end cover body can be formed in one step, and the dimensional accuracy can be guaranteed to meet the matching requirements with the pump body, effectively improving the reliability of the assembly, and the material with good rust resistance does not require subsequent processing, nor does it require surface rust prevention treatment, which can achieve long-term and effective rust prevention of the front end cover. The pump body is limited by the pump body limiting ring to prevent the pump body from being displaced by water pressure, which greatly improves the performance of the pump. The inner circumference of the front end cover of the pump body is sealed by the pump body matching structure, which not only ensures the sealing effect, but also improves the strength of the front end cover. In addition, the front end cover of the pump body is easy to manufacture, which improves the assembly performance as a whole, thereby improving the reliability of the pump performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the front end cover of the pump body of the present invention;

[0018] Figure 2 This is a cross-sectional view of the front end cover of the pump body of the present invention;

[0019] Figure 3 This is a structural diagram of the pump body anti-displacement structure of the present invention;

[0020] Figure 4 This is a schematic structural diagram of a pump without a casing according to the present invention;

[0021] Figure 5 is a cross-sectional view of the pump of the present invention;

[0022] Figure 6 This is a top view of the present invention without the upper shell and the controller cover;

[0023] Figure 7 yes Figure 3 Enlarged view of point A in the middle;

[0024] In the figure: 1. front cover body, 11. pump body limiting ring, 12. pump body matching structure, 13. pump body sealing limiting ring groove, 14. reinforcement structure, 15. motor shaft hole, 16. mechanical seal inner chamber, 17. mechanical seal outer chamber, 18. guide vane positioning groove, 19. water flow channel, 2. pump body, 20. impeller cavity, 21. sealing matching end, 22. external limiting ring, 23. pump rest sealing ring, 24. pump body limiting structure, 25. inclined matching surface, 26. pump body displacement control gap, 27. annular convex ring, 28. sealing groove, 29. notch, 3. motor, 31. motor rotor shaft, 32. corrugated elastic washer, 33. non-metallic nut, 4. sealing ring, 5. guide vane, 6. mechanical seal, 7. inner casing, 8. motor front cover, 9. pump assembly, 10. impeller;

[0025] 100. Solenoid valve assembly, 200. Pressure sensor assembly, 300. Flow sensor assembly, 400. Controller assembly. DETAILED DESCRIPTION

[0026] The various aspects of the present invention are described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0027] Example 1:

[0028] exist Figure 1 、 Figure 2 In the illustrated embodiment, a pump front end cover includes a front end cover body 1. The front end cover body 1 is an integrally stretched and shaped body. A pump body retaining ring 11 is formed integrally with the edge of the front end cover body 1 by bending. The pump body retaining ring 11 is tilted toward the center of the front end cover body 1 in a barbed-hook-like structure. The ring tilt angle α is 0 to 5 degrees. The purpose of the tilt angle is to achieve an effective retaining effect of the barbed-hook structure. A pump body mating structure 12 is provided radially toward the center of the front end cover body 1, opposing the pump body retaining ring 11. The pump body mating structure 12 is a convex ring-shaped structure. The pump body mating structure 12 is tilted toward the center of the front end cover body 1 in an inclined surface structure. The inclined surface tilt angle β is 0 to 10 degrees. This structure is used to effectively fit with the pump body and further limit the displacement of the pump body. The pump body mating structure 12 is a stretched and shaped structure.

[0029] The pump body limiting ring 11 and the pump body matching structure 12 enclose a ring to form a pump body sealing limiting ring groove 13, and a reinforcement structure 14 is recessed at the bottom of the pump body sealing limiting ring groove 13. The reinforcement structure 14 can increase the strength of the front end cover body 1 and, at the same time, increase the overall change amount after the pump body and the front end cover body 1 are matched. That is, the pump body displacement caused by water pressure can be deformed by the reinforcement structure 14 into an overall displacement between the pump body and the reinforcement structure on the front end cover body, and the pump body displacement is transferred to the reinforcement structure 14 of the front end cover body 1, thereby solving the problem of displacement deformation of the pump body caused by water pressure, which in turn affects the sealing performance of the pump.

[0030] A motor shaft hole 15 is opened along the axis on the front end cover body 1, and the motor shaft hole 15 is bent in an L shape toward the side away from the motor to form a mechanical seal inner chamber 16. A mechanical seal outer chamber 17 is formed on the side opposite to the mechanical seal inner chamber 16. A guide vane positioning groove 18 is recessed downward on the front end cover body 1 outside the mechanical seal inner chamber 16, and a plurality of water flow channels 19 are evenly distributed on the front end cover body 1 where the guide vane positioning groove 18 is located.

[0031] Since the mechanical seal inner chamber 16 and the mechanical seal outer chamber 17 are both formed by stretching and are integrally formed without the need for machining, the production process is stable and there is no secondary processing, so the dimensional accuracy and stability can be guaranteed, thereby ensuring the installation accuracy and matching accuracy, and improving the sealing performance of the mechanical seal inner chamber 16 and the mechanical seal outer chamber 17.

[0032] The provision of the guide vane positioning groove 18 not only enhances the strength of the front end cover body 1, but also meets the need for guide vane positioning. Moreover, during use, the guide vane and the guide vane positioning groove 18 form a good positioning structure, thereby improving the performance of the pump.

[0033] The arrangement of the pump body limiting ring 11 and the pump body matching structure 12 limits the displacement of the pump body caused by water pressure during use to a minimum range, and transfers the displacement of the pump body to the overall displacement of the pump body and the front end cover body, effectively improving the overall performance of the pump.

[0034] like Figure 3 As shown, a pump body anti-displacement structure includes a pump body front end cover, that is, a front end cover body 1 and a pump body 2. The pump body 2 is provided with a sealing mating end 21, and the sealing mating end 21 is provided with a double body structure that cooperates with the pump body sealing limiting ring groove 13. The double body structure includes an external limiting ring 22 arranged on the outside and a pump rest sealing ring 23 arranged on the inside. The external limiting ring 22 cooperates with the pump body limiting ring 11 to form a pump body limiting structure 24. The pump body limiting structure 24 is a barbed limiting structure. Figure 7As shown, the outer ring surface of the external limit ring 22 is set as an inclined mating surface 25, and the inclination δ of the inclined mating surface 25 is 10 to 20 degrees. When in use, the inclined mating surface 25 of the external limit ring cooperates with the inner ring edge of the pump body limit ring 11, thereby forming a pump body displacement control gap 26 between the external limit ring 22 and the pump body limit ring 11. This barbed hook limiting structure controls the displacement of the pump body 2 caused by water pressure during use within the range of the pump body displacement control gap 26, transferring the displacement to the side, achieving effective control of the pump body displacement, limiting the displacement of the pump body caused by water pressure, and converting the top pressure of the pump body on the front end cover of the pump body due to water pressure into lateral sliding, thereby controlling the pump body displacement to be released inside the pump body limit ring, avoiding the pump body displacement being affected by water pressure and having nowhere to release, thereby affecting the performance of the pump, and reducing the adverse effects of the pump body displacement on the pump.

[0035] The pump body sealing ring 23 is provided to achieve sealing in cooperation with the pump body matching structure 12 on the front end cover body. The pump body sealing ring 23 includes an annular convex ring 27 and a sealing groove 28. A notch 29 is formed between the sealing groove 28 and the inner annular surface of the pump body sealing ring 23, so that a step structure is formed between the inner annular surface and the annular convex ring 27. The end face height of the inner annular surface is less than the height of the annular convex ring. The inner annular surface of the pump body sealing ring 23 is an inclined surface, and the inclined surface is provided in cooperation with the pump body matching structure 12. A sealing ring 4 is provided at the cooperation between the sealing groove 28 and the pump body matching structure 12. Such a structure enables the inner annular surface to have a relative movement along the pump body matching structure 12 when the pump body is subject to restrictive displacement due to water pressure. The inclined matching surface cooperates with the inclined matching surface of the pump body matching structure to form an inclined matching structure, and the inclined matching structure and the sealing ring 28 form an effective pump body seal.

[0036] The guide vane 5 is positioned inside the guide vane positioning groove 18, and the guide vane 5 cooperates with the guide vane positioning groove 18, which positions the guide vane 5. The mechanical seal inner chamber 16 is provided with an organic seal 6, which realizes the sealing cooperation between the motor rotor shaft 31 and the front end cover body 1. The mechanical seal outer chamber 17 is used to achieve cooperation with the inner housing 7 and the front end cover 8 of the motor, thereby forming an integrated structure of the pump body 2 and the motor 3.

[0037] like Figure 4 、 Figure 5 、 Figure 6As shown, a pump includes the pump body anti-displacement structure described above, and also includes a motor 3 that cooperates with the mechanical seal outer chamber 17 on the front end cover body 1 to form an integrated pump structure. The motor rotor shaft 31 inside the motor passes through the motor shaft hole 15 on the front end cover body 1 and extends into the pump body 2, and the end of the motor rotor shaft 31 extending into the pump body 2 is provided with an impeller 10. The pump body 2 is also provided with a guide vane 5 that forms an impeller cavity with the pump body, and the guide vane 5 cooperates with the guide vane positioning groove 18.

[0038] The pump body 2 and the motor 3 form an integrated structure through the front end cover body 1.

[0039] A solenoid valve assembly 100 , a pressure sensor assembly 200 , a flow sensor assembly 300 and a controller assembly 400 are also provided inside the pump body 2 .

[0040] The impeller 10 and the guide vane 2 are arranged at the end of the motor rotor shaft and an impeller cavity 20 is formed between the guide vane and the pump body. The impeller is arranged inside the impeller cavity. The impeller 10 and the motor rotor shaft 31 are fixed and limited by a corrugated elastic washer 32 and a non-metallic nut 33. The motor rotor shaft drives the impeller to rotate.

[0041] The front end cover structure and anti-displacement structure of the pump body mainly solve the problem of the pump rusting during use and improve product reliability through assembly; a pump body limit ring is set to reduce the displacement of the pump body caused by water pressure during use; the pump body matching structure on the front end cover body is formed by stretching and shaping, and the dimensional accuracy meets the matching requirements with the pump body. No processing is required and no surface treatment is possible; the guide vane positioning design meets the guide vane positioning requirements while increasing the surface strength of the parts. The design of the mechanical seal chamber also has very high dimensional stability. Because the parts are formed as a whole, the production process is stable, there is no secondary processing, and the stability is high; the inner periphery of the front end cover of the pump body is sealed, and an annular bend is set on the wall to form a pump body limit ring, which improves the overall strength.

[0042] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the inventive type should not be considered as being limited to the specific forms described in the embodiments. The protection scope of the inventive type also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A pump front end cover, used to cooperate with the pump body, characterized by: The invention comprises a front end cover body (1) with an integral stretching and shaping structure, wherein a pump body limiting ring (11) is formed by integrally bending on the edge of the front end cover body (1), a pump body matching structure (12) is provided on the front end cover body (1) along the radial direction toward the center, and the pump body limiting ring (11) and the pump body matching structure (12) cooperate to form a pump body sealing limiting ring groove (13); a pump body displacement control gap (26) is formed between the pump body limiting ring (11) and the external limiting ring (22) on the pump body.

2. The front end cover of a pump body according to claim 1, characterized in that: A reinforcing structure (14) is recessed at the bottom of the pump body sealing limiting ring groove (13).

3. The front end cover of a pump body according to claim 1, characterized in that: A motor shaft hole (15) is provided at the center of the front end cover body (1), and the motor shaft hole (15) is bent toward one side of the pump body matching structure (12) to form a mechanical seal inner chamber (16), and the mechanical seal inner chamber (16) is bent outward in an L-shape and is concavely provided to form a guide vane positioning groove (18).

4. The front end cover of the pump body according to claim 3, characterized in that: A ring-type mechanical seal outer chamber (17) is formed on the side of the front end cover body (1) opposite to the mechanical seal inner chamber (16); a plurality of water flow channels (19) are provided at the bottom of the mechanical seal outer chamber (17).

5. The pump front end cover according to any one of claims 1 to 4, characterized in that: The pump body limiting ring (11) is tilted toward the center of the front end cover body (1) to form a hook-type structure, and the ring inclination angle (α) of the pump body limiting ring (11) is 0 to 5 degrees; the pump body matching structure (12) is tilted toward the center of the front end cover body (1) to form an inclined surface structure, and the inclined surface inclination angle (β) is 0 to 10 degrees.

6. A pump body anti-displacement structure, characterized by: The pump body front end cover comprises the pump body according to any one of claims 1 to 5, and also comprises a pump body (2), wherein the pump body (2) is provided with a double-body structure for cooperating with a pump body sealing limit ring groove (13), and the double-body structure comprises an outer limit ring (22) on the outside and a pump body sealing ring (23) on the inside; the outer limit ring (22) cooperates with the pump body limit ring (11) to form a barbed hook pump body limit structure, and a pump body displacement control gap (26) is formed between the outer limit ring (22) and the pump body limit ring (11).

7. The pump body anti-displacement structure according to claim 6, characterized in that: The pump body sealing ring (23) comprises an annular convex ring (27) and a sealing groove (28), a gap (29) is formed between the sealing groove (28) and the inner annular surface of the pump body sealing ring, and the end surface height of the inner annular surface is smaller than the height of the annular convex ring (27); a sealing ring (4) is provided inside the sealing groove (28).

8. The pump body anti-displacement structure according to claim 6, characterized in that: The outer limiting ring (22) is provided with an inclined mating surface (25) inclined toward the center direction of the front end cover body (1), and the inclined angle (δ) of the inclined mating surface (25) is 10 to 20 degrees.

9. A pump, characterized in that: The pump body anti-displacement structure includes the pump body anti-displacement structure according to any one of claims 6 to 8, and also includes a motor (3) that cooperates with the mechanical seal outer chamber (17) on the front end cover body (1) to form an integrated pump structure, the motor rotor shaft (31) inside the motor passes through the motor shaft hole (15) on the front end cover body (1) and extends into the pump body (2), and the end of the motor rotor shaft (31) extending into the pump body (2) is provided with an impeller (10), and the pump body (2) is further provided with a guide vane (5) that forms an impeller cavity with the pump body, and the guide vane (5) cooperates with the guide vane positioning groove (18).

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