Disc type motor pump

Abstract

The utility model provides a disc type motor pump, and belongs to the technical field of pumps. The disc type motor pump solves the technical problems of an existing disc type motor pump and the like. A disc type motor pump comprises a motor shell and a pump shell which are fixedly connected, a stator assembly, a rotor assembly and an impeller which are sequentially arranged in the axial direction are installed in the motor shell and the pump shell, the stator assembly comprises a stator shielding sleeve and a stator body located in the stator shielding sleeve, and a fixing column is arranged in the middle of the stator shielding sleeve in a protruding mode in the direction of the rotor assembly. The rotor assembly is arranged outside the fixing column in a sleeving mode and rotationally connected with the fixing column through a sliding bearing, and the impeller is fixedly connected to the rotor assembly. The axial space of the pump is reduced, and the rotation stability of the rotor assembly is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, in particular to a disc-type motor pump. Background Art

[0002] Disc motors are suitable for applications requiring high torque density and compact space, such as electric vehicles, renewable energy systems, gear energy storage systems, and industrial equipment, due to their compact structure, high efficiency, and high power density.

[0003] For example, the disc motor circulation pump with patent number 2017202540944 discloses that a shielding component is arranged between the pump body and the motor, and the shielding component isolates the pump body and the motor to form the inner cavity of the pump body and the inner cavity of the motor, the stator is located in the inner cavity of the motor, and a fixed shaft is integrated on the shielding component, the fixed shaft continues to extend in the direction away from the stator as an extension, and a runner is arranged on the outer sleeve of the extension, wherein the runner is a structure in which the rotor and the impeller are integrated into one. When the shielding sleeve is an injection molded part, the upper part of the fixed shaft is injection molded and assembled on the shielding component, and the lower extension of the fixed shaft is connected to the runner. In order to reduce the axial space, the thickness of the shielding component cannot be too thick, resulting in cracks at the part where the shielding component and the fixed shaft are assembled after the runner rotates, and liquid infiltration affects the operation of the motor at that time; wherein the rotor and the impeller are integrated into one, and when the impeller is damaged, the overall structure needs to be replaced, and the maintenance and repair costs are high. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a disc-type motor pump.

[0005] The technical problem to be solved by the utility model is how to reduce the axial space of the motor pump while better supporting the rotation of the rotor assembly and the impeller.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a disc motor pump, including a motor housing and a pump housing that are fixedly connected, a stator assembly, a rotor assembly and an impeller arranged in sequence along the axial direction are installed in the motor housing and the pump housing, the stator assembly includes a stator shielding sleeve and a stator body located in the stator shielding sleeve, a fixing column protrudes from the middle of the stator shielding sleeve toward the rotor assembly, the rotor assembly is sleeved outside the fixing column and is rotatably connected to the fixing column through a sliding bearing, and the impeller is fixedly connected to the rotor assembly.

[0007] The stator assembly and rotor assembly of the disc motor pump are arranged axially up and down. The stator assembly consists of a stator shielding sleeve and a stator body. The stator shielding sleeve wraps the stator body to form a whole with a certain thickness, and a fixing column protrudes from the middle of the stator shielding sleeve toward the rotor assembly. The fixing column and the stator shielding sleeve are an integral structure. In addition, the stator assembly and the rotor assembly are already axially arranged, and the fixing column does not need to pass through the middle of the stator assembly, which reduces the length of the fixing column, reduces the axial space of the pump, and also makes the fixing column have a certain strength to support the rotation of the rotor assembly, thereby improving the stability of the rotation of the rotor assembly.

[0008] Furthermore, the stator shielding sleeve has a mounting ring protruding radially, and the mounting ring is sealed and fixed between the motor housing and the pump housing through a seal and a fixing member. A motor cavity is formed between the stator shielding sleeve and the motor housing, and a pump cavity is formed between the stator shielding sleeve and the pump housing, and the motor cavity and the pump cavity are not connected to each other. The stator shielding sleeve directly fixed to the motor housing and the pump housing can reduce the shaking of the fixing column, better support the rotation of the rotor assembly, and improve stability. The stator shielding sleeve and the stator body can be a split structure or an integrated structure.

[0009] Furthermore, the stator shielding sleeve and the stator body are injection molded into an integral structure. This solution adopts an integrally molded structure to form the stator assembly, and naturally the fixing column is also integrally molded together, so that the fixing column has better strength.

[0010] Furthermore, the stator shielding sleeve has a separate shielding upper sleeve and a shielding lower sleeve, the shielding lower sleeve has an annular concave cavity 1, a step cylinder protrudes from the middle of the annular concave cavity 1, the shielding upper sleeve has an annular concave cavity 2, a concave cavity cylinder protrudes from the middle of the annular concave cavity 2, the outer circumference of the annular concave cavity 2 is against the inner circumference of the annular concave cavity 1, the annular concave cavity 1 and the bottom surface of the annular concave cavity 2 form a receiving cavity, the stator body is located in the annular concave cavity 1, the step cylinder is embedded in the concave cavity cylinder and forms a fixed column. This solution adopts the method of first splitting the stator shielding sleeve into a shielding upper sleeve and a shielding lower sleeve, and then fixing and installing the stator body in the receiving cavity, and embedding the step cylinder in the concave cavity cylinder to form a fixed column, so that the fixed column has a certain strength to support the rotation of the rotor assembly.

[0011] Furthermore, the rotor assembly includes a rotor shielding sleeve and a rotor body, the rotor body and the rotor shielding sleeve are integrally injection molded, the rotor shielding sleeve has a step through hole in the middle, the sliding bearing includes a ceramic sleeve and a silicon carbide sleeve, the silicon carbide sleeve is fixed in the step through hole, the ceramic sleeve is fixed on the periphery of the fixed column, the silicon carbide sleeve is arranged on the periphery of the ceramic sleeve and the two are relatively slidably matched. The integrally molded step through hole in the rotor shielding sleeve can better fix the sliding bearing, and can also allow the liquid in the pump cavity to pass through the step through hole to cool the rotor assembly and the stator assembly.

[0012] Furthermore, a thrust plate is fixed on the step through hole, the upper end surface of the thrust plate abuts against the step surface of the step through hole, and the lower end surface abuts against the upper end surfaces of the ceramic sleeve and the silicon carbide sleeve, the inner circumference of the silicon carbide sleeve is provided with a flow channel groove 1, and the lower end surface of the thrust plate is provided with a flow channel groove 2, and the flow channel groove 2 connects the step through hole and the flow channel groove 1. The flow channel groove 1, the flow channel groove 2 and the step through hole form a flow channel, so that the liquid in the pump cavity can flow along the flow channel to lubricate the sliding bearing and cool the rotor assembly and the stator assembly.

[0013] Further, the upper end surface of the rotor shield sleeve has a plurality of fixing protrusions protruding upward, one end of the fixing protrusion is inwardly recessed with a groove, the upper end surface of the rotor shield sleeve has a plurality of buckles protruding upward, the buckles are suspended in the groove, the lower end of the impeller has a fixing hole that cooperates with the fixing protrusion, the buckles and the fixing protrusion both pass through the fixing hole, and the buckles buckle the impeller. The impeller and the rotor shield sleeve are detachable and fixed, so that the impeller can be easily replaced.

[0014] Furthermore, the pump housing is provided with a water inlet and a water outlet, and a thrust ring is fixedly provided at the inner end of the water inlet, and the thrust ring is not in contact with the impeller.

[0015] Furthermore, the motor housing, stator shielding sleeve and stator body are injection molded into an integrated structure.

[0016] Compared with the prior art, the technical effect of the utility model is as follows: the stator assembly and the rotor assembly of the disc motor pump are arranged axially up and down, the stator assembly is composed of a stator shielding sleeve and a stator body, the stator shielding sleeve wraps the stator body to form a whole with a certain thickness, and a fixing column protrudes in the middle of the stator shielding sleeve toward the rotor assembly, the fixing column and the stator shielding sleeve are an integral structure, and with the stator assembly and the rotor assembly that have been axially arranged, the fixing column does not need to pass through the middle of the stator assembly, reducing the length of the fixing column, reducing the axial space of the pump, and also making the fixing column have a certain strength to support the rotation of the rotor assembly; the stator shielding sleeve is directly fixed to the motor housing and the pump housing to reduce the shaking of the fixing column, better support the rotation of the rotor assembly, and improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model.

[0018] Figure 2 It is a sectional stereoscopic diagram of the stator shielding sleeve of the utility model.

[0019] Figure 3 It is a cutaway stereoscopic view of the rotor assembly of the utility model.

[0020] Figure 4 It is a three-dimensional diagram of the impeller of the utility model.

[0021] Figure 5 It is a cross-sectional view of the second embodiment of the present utility model.

[0022] Figure number marking: 1, motor housing; 101, motor cavity; 2, pump housing; 201, pump cavity; 202, water inlet; 203, water outlet; 3, stator assembly; 31, stator shielding sleeve; 312, shielding upper sleeve; 313, shielding lower sleeve; 314, annular cavity 1; 315, stepped cylinder; 316, annular cavity 2; 317, cavity cylinder; 32, stator body; 33, fixing column; 34, installation Mounting ring; 4. Rotor assembly; 41. Rotor shielding sleeve; 411. Step through hole; 412. Fixing protrusion; 413. Groove; 414. Buckle; 42. Rotor body; 5. Impeller; 501. Fixing hole; 6. Sliding bearing; 61. Ceramic sleeve; 62. Silicon carbide sleeve; 621. Flow channel groove 1; 63. Thrust plate; 631. Flow channel groove 2; 7. Thrust ring; 8. Seal; 9. Fixing piece. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top" and "bottom" are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] according to Figures 1 to 4As shown, a disc motor pump comprises a motor housing 1 and a pump housing 2 which are fixedly connected, the pump housing 2 having a water inlet 202 and a water outlet 203, and the motor housing 1 and the pump housing 2 are provided with a stator assembly 3, a rotor assembly 4 and an impeller 5 which are arranged in sequence along the axial direction. The stator assembly 3 and the rotor assembly 4 of the disc motor pump are arranged axially up and down, the stator assembly 3 is composed of a stator shielding sleeve 31 and a stator body 32, the stator shielding sleeve 31 wraps the stator body 32 to form a whole with a certain thickness, and the stator body 32 is located inside the stator shielding sleeve 31. A fixing column 33 protrudes from the middle of the stator shielding sleeve 31 toward the rotor assembly 4, and the fixing column 33 and the stator shielding sleeve 31 are an integral structure. Since the stator assembly 3 and the rotor assembly 4 are arranged axially, the fixing column 33 does not need to pass through the middle of the stator assembly 3, which reduces the length of the fixing column 33, reduces the axial space of the pump, and also makes the fixing column 33 have a certain strength to support the rotation of the rotor assembly 4, thereby improving the stability of the rotation of the rotor assembly 4. The rotor assembly 4 is sleeved outside the fixed column 33 and is rotatably connected to the fixed column 33 through the sliding bearing 6, and the impeller 5 is fixedly connected to the rotor assembly 4. The stator shielding sleeve 31 has a mounting ring 34 protruding radially, and the mounting ring 34 is sealed and fixed between the motor housing 1 and the pump housing 2 through the sealing member 8 and the fixing member 9. A motor cavity 101 is formed between the stator shielding sleeve 31 and the motor housing 1, and a pump cavity 201 is formed between the stator shielding sleeve 31 and the pump housing 2. The motor cavity 101 and the pump cavity 201 are not connected to each other. The stator shielding sleeve 31 directly fixed to the motor housing 1 and the pump housing 2 can reduce the shaking of the fixed column 33, better support the rotation of the rotor assembly 4, and improve stability. The stator shielding sleeve 31 and the stator body 32 can be a split structure or an integrated structure.

[0026] The rotor assembly 4 includes a rotor shielding sleeve 41 and a rotor body 42, the rotor body 42 and the rotor shielding sleeve 41 are integrally injection molded, the rotor shielding sleeve 41 has a step through hole 411 in the middle, the sliding bearing 6 includes a ceramic sleeve 61 and a silicon carbide sleeve 62, the silicon carbide sleeve 62 is fixed in the step through hole 411, the ceramic sleeve 61 is sleeved and fixed on the outer periphery of the fixing column 33, and the silicon carbide sleeve 62 is sleeved on the outer periphery of the ceramic sleeve 61 and the two are relatively slidably matched. The integrally molded step through hole 411 in the rotor shielding sleeve 41 can better fix the sliding bearing 6, and can also allow the liquid in the pump chamber 201 to pass through the step through hole 411 to cool the rotor assembly 4 and the stator assembly 3.

[0027] A thrust plate 63 is also fixed on the step through hole 411, the upper end surface of the thrust plate 63 abuts against the step surface of the step through hole 411, and the lower end surface abuts against the upper end surfaces of the ceramic sleeve 61 and the silicon carbide sleeve 62, a flow channel groove 1 621 is provided on the inner circumference of the silicon carbide sleeve 62, and a flow channel groove 2 631 is provided on the lower end surface of the thrust plate 63, and the flow channel groove 2 631 connects the step through hole 411 and the flow channel groove 1 621. The flow channel groove 1 621, the flow channel groove 2 631 and the step through hole 411 form a flow channel, so that the liquid in the pump chamber 201 can flow along the flow channel to lubricate the sliding bearing 6 and cool the rotor assembly 4 and the stator assembly 3.

[0028] The preferred fixing method of the rotor assembly 4 and the impeller 5 is as follows: a plurality of fixing protrusions 412 protrude upward from the upper end surface of the rotor shielding sleeve 41, one end of the fixing protrusion 412 is recessed inwardly with a groove 413, a plurality of buckles 414 protrude upward from the upper end surface of the rotor shielding sleeve 41, the buckle 414 is suspended in the groove 413, the lower end of the impeller 5 has a fixing hole 501 that matches the fixing protrusion 412, the buckle 414 and the fixing protrusion 412 both pass through the fixing hole 501, and the buckle 414 buckles the impeller 5. The impeller 5 and the rotor shielding sleeve 41 are detachably fixed, so that the impeller 5 can be replaced conveniently. A thrust ring 7 is fixedly arranged at the inner end of the water inlet 202, and the thrust ring 7 and the impeller 5 do not contact.

[0029] like Figure 1 , 2 As shown, embodiment 1 of the stator assembly 3: wherein the stator shielding sleeve 31 has a split shielding upper sleeve 312 and a shielding lower sleeve 313, the shielding lower sleeve 313 has an annular cavity 1 314, the middle of the annular cavity 1 314 protrudes with a step cylinder 315, the shielding upper sleeve 312 has an annular cavity 2 316, the middle of the annular cavity 2 316 protrudes with a cavity cylinder 317, the outer circumferential surface of the annular cavity 2 316 abuts against the inner circumferential surface of the annular cavity 1 314, the annular cavity 1 314 and the bottom surface of the annular cavity 2 316 form a accommodating cavity, the stator body 32 is located in the annular cavity 1 314, the step cylinder 315 is embedded in the cavity cylinder 317 and forms a fixing column 33.

[0030] Among them Figure 5 As shown, the second embodiment of the stator assembly 3: the stator shielding sleeve 31 and the stator body 32 are injection molded into an integral structure. This solution adopts an integrally molded structure to form the stator assembly 3, and naturally the fixing column 33 is also integrally molded together, so that the fixing column 33 has better strength.

[0031] The motor housing 1 , the stator shielding sleeve 31 and the stator body 32 may also be formed into an integral structure by injection molding.

[0032] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A disc motor pump, comprising a motor housing (1) and a pump housing (2) fixedly connected, characterized in that: A stator assembly (3), a rotor assembly (4) and an impeller (5) are installed in the motor housing (1) and the pump housing (2) in sequence along the axial direction. The stator assembly (3) comprises a stator shielding sleeve (31) and a stator body (32) located in the stator shielding sleeve (31). A fixing column (33) protrudes from the middle of the stator shielding sleeve (31) toward the rotor assembly (4). The rotor assembly (4) is sleeved outside the fixing column (33) and is rotatably connected to the fixing column (33) via a sliding bearing (6). The impeller (5) is fixedly connected to the rotor assembly (4).

2. A disc motor pump according to claim 1, characterized in that: The stator shielding sleeve (31) is provided with a mounting ring (34) protruding in the radial direction. The mounting ring (34) is sealed and fixed between the motor housing (1) and the pump housing (2) through a sealing member (8) and a fixing member (9). A motor cavity (101) is formed between the stator shielding sleeve (31) and the motor housing (1), and a pump cavity (201) is formed between the stator shielding sleeve (31) and the pump housing (2). The motor cavity (101) and the pump cavity (201) are not connected to each other.

3. A disc motor pump according to claim 2, characterized in that: The stator shielding sleeve (31) and the stator body (32) are injection-molded into an integral structure.

4. A disc motor pump according to claim 2, characterized in that: The stator shielding sleeve (31) comprises a separate shielding upper sleeve (312) and a shielding lower sleeve (313); the shielding lower sleeve (313) comprises an annular concave cavity 1 (314) inside, a stepped cylinder (315) protrudes from the middle of the annular concave cavity 1 (314); the shielding upper sleeve (312) comprises an annular concave cavity 2 (316) inside, a concave cavity cylinder (317) protrudes from the middle of the annular concave cavity 2 (316); the outer circumferential surface of the annular concave cavity 2 (316) abuts against the inner circumferential surface of the annular concave cavity 1 (314) embedded therein; the annular concave cavity 1 (314) and the cavity bottom surface of the annular concave cavity 2 (316) form a receiving cavity; the stator body (32) is located in the annular concave cavity 1 (314); the stepped cylinder (315) is embedded in the concave cavity cylinder (317) and forms a fixing column (33).

5. A disc motor pump according to any one of claims 1 to 4, characterized in that: The rotor assembly (4) comprises a rotor shielding sleeve (41) and a rotor body (42), the rotor body (42) and the rotor shielding sleeve (41) are integrally injection molded, the rotor shielding sleeve (41) has a stepped through hole (411) in the middle, the sliding bearing (6) comprises a ceramic sleeve (61) and a silicon carbide sleeve (62), the silicon carbide sleeve (62) is fixed in the stepped through hole (411), the ceramic sleeve (61) is sleeved and fixed on the outer periphery of the fixing column (33), the silicon carbide sleeve (62) is sleeved on the outer periphery of the ceramic sleeve (61), and the two are relatively slidably matched.

6. A disc motor pump according to claim 5, characterized in that: A thrust plate (63) is also fixed on the step through hole (411), the upper end surface of the thrust plate (63) abuts against the step surface of the step through hole (411), and the lower end surface abuts against the upper end surfaces of the ceramic sleeve (61) and the silicon carbide sleeve (62), a flow channel groove 1 (621) is provided on the inner circumferential surface of the silicon carbide sleeve (62), and a flow channel groove 2 (631) is provided on the lower end surface of the thrust plate (63), and the flow channel groove 2 (631) connects the step through hole (411) and the flow channel groove 1 (621).

7. A disc motor pump according to claim 5, characterized in that: The upper end surface of the rotor shielding sleeve (41) is provided with a plurality of fixing protrusions (412) protruding upward, one end of the fixing protrusion (412) is inwardly recessed with a groove (413), the upper end surface of the rotor shielding sleeve (41) is provided with a plurality of buckles (414) protruding upward, the buckles (414) are suspended in the groove (413), the lower end of the impeller (5) is provided with a fixing hole (501) cooperating with the fixing protrusion (412), the buckle (414) and the fixing protrusion (412) both pass through the fixing hole (501), and the buckle (414) buckles the impeller (5).

8. A disc motor pump according to claim 1, characterized in that: The pump housing (2) is provided with a water inlet (202) and a water outlet (203), and a thrust ring (7) is fixedly provided at the inner end of the water inlet (202), and the thrust ring (7) and the impeller (5) are not in contact.

9. A disc motor pump according to claim 1, characterized in that: The motor housing (1), the stator shielding sleeve (31) and the stator body (32) are injection-molded into an integrated structure.

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