Integrated pipeline pump

Abstract

The present invention provides an integrated pipeline pump, comprising: a pump housing, a pump impeller, a rotor assembly and a stator assembly; a support shaft coaxially arranged therewith is provided in the pump housing, and the pump impeller is rotatably connected to the support shaft; the rotor assembly is connected to the rim of the pump impeller, and the inner wall surface of the pump housing is provided with a first annular groove and a second annular groove interconnected with each other, the rotor assembly is located in the first annular groove, and the stator assembly is located in the second annular groove, and arranged opposite to the rotor assembly; an inlet flow channel, an annular flow channel and an outlet flow channel interconnected are formed between the rotor housing, the stator housing and the pump housing, and a first shear flow channel is formed at the inlet flow channel. In the integrated pipeline pump of the present invention, the first shear flow channel can shear, squeeze and crush large-sized impurities in the cooling fluid into small-sized impurities, effectively preventing impurities from scratching the stator housing and the rotor housing, thereby facilitating the reliability of the operation of the integrated pipeline pump.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid machinery, and in particular to an integrated pipeline pump. Background Art

[0002] The integrated pipeline pump is a pumping device that radially integrates the rim motor and the pump impeller. The rim motor is the prime mover that converts the input electrical energy of the integrated pipeline pump into rotational mechanical energy. It mainly includes a stator assembly and a rotor assembly. An annular air gap of a certain size is formed between the stator assembly and the rotor assembly. The annular air gap is the magnetic circuit coupling channel between the stator assembly and the rotor assembly, and the annular air gap also serves as a cooling channel. The cooling fluid flows through the annular air gap between the stator assembly and the rotor assembly, performs convective heat exchange with the stator assembly and the rotor assembly, and removes the heat of the stator assembly and the rotor assembly.

[0003] The air gap size of the air gap channel is one of the important parameters of the integrated pipeline pump. A larger air gap size will increase the magnetic resistance of the rim motor and reduce its efficiency. In order to improve the efficiency of the rim motor and ensure the safety of the rotor assembly and the stator assembly, the air gap size is usually reduced as much as possible under the premise of ensuring that the rotor assembly and the stator assembly do not interfere with each other in motion. When the integrated pipeline pump pumps the fluid, there may be impurities such as sediment and suspended matter in the fluid. The impurities enter the cooling channel with the cooling fluid. When the rotor assembly rotates at high speed, the impurities are easy to scratch the rotor housing and the stator housing, causing the drive motor to be infiltrated with water and burned, affecting the operation of the pipeline pump. Summary of the invention

[0004] The present invention provides an integrated pipeline pump, which is used to solve the problem that the existing pipeline pump cannot effectively intercept impurities in the fluid during operation, and the impurities enter the cooling flow channel, resulting in poor reliability of the pipeline pump.

[0005] The present invention provides an integrated pipeline pump, comprising: a pump housing, a pump impeller, a rotor assembly and a stator assembly;

[0006] A support shaft coaxially arranged therewith is provided in the pump housing, and the pump impeller is rotatably connected to the support shaft; the rotor assembly is connected to the rim of the pump impeller, the rotor assembly includes a rotor housing, and the stator assembly includes a stator housing;

[0007] The inner wall surface of the pump housing is provided with a first annular groove and a second annular groove which are interconnected, the rotor assembly is located in the first annular groove, and the stator assembly is located in the second annular groove and arranged opposite to the rotor assembly; an inlet flow channel, an annular flow channel and an outlet flow channel which are interconnected are formed between the rotor housing, the stator housing and the pump housing;

[0008] The end face of the rotor housing at the inlet flow channel is convexly formed with a plurality of coaxially arranged first annular convex ribs, and the side groove wall surface of the first annular groove is convexly formed with a plurality of coaxially arranged second annular convex ribs, the first annular convex rib is located in the area surrounded by two adjacent second annular convex ribs, and a first shear flow channel is formed between the side wall surface of at least one of the first annular convex ribs and the side wall surface of the adjacent second annular convex rib.

[0009] According to an integrated pipeline pump provided by the present invention, the side wall surface of the first annular convex rib is provided with a plurality of first grooves arranged in a circular array, and the side wall surface of the second annular convex rib is provided with a plurality of second grooves arranged in a circular array, the first grooves and the second grooves are arranged in a one-to-one correspondence, and the plurality of first grooves and the plurality of second grooves form the first shear flow channel between the side wall surface of the first annular convex rib and the side wall surface of the adjacent second annular convex rib.

[0010] According to an integrated pipeline pump provided by the present invention, the first groove is V-shaped, and the second groove is U-shaped.

[0011] According to an integrated pipeline pump provided by the present invention, a second shear channel is provided between the outlet end of the inlet channel and the inlet end of the annular channel;

[0012] The outer wall surface of the rotor shell is provided with a plurality of first corrugated grooves arranged in a circular array, and the groove bottom surface of the first annular groove is provided with a plurality of second corrugated grooves arranged in a circular array, the first corrugated grooves and the second corrugated grooves are arranged one by one, and the plurality of first corrugated grooves and the plurality of second corrugated grooves form the second shear flow channel between the outer wall surface of the rotor shell and the groove bottom surface of the first annular groove.

[0013] According to an integrated pipeline pump provided by the present invention, the first corrugated groove is arranged on the outer wall surface of the rotor housing in an inclined shape, and the second corrugated groove is arranged on the groove bottom surface of the first annular groove in an inclined shape.

[0014] According to an integrated pipeline pump provided by the present invention, a first groove top surface is formed between two adjacent first corrugated grooves, and a second groove top surface is formed between two adjacent second corrugated grooves, and the distance between the first groove top surface and the second groove top surface gradually decreases from the inlet end of the second shear flow channel to the outlet end of the second shear flow channel.

[0015] According to an integrated pipeline pump provided by the present invention, the distance between the top surface of the first groove and the top surface of the second groove at the inlet end of the second shear flow channel is greater than the distance between the outer wall surface of the rotor housing and the bottom surface of the groove of the first annular groove at the outlet end of the inlet flow channel.

[0016] According to an integrated pipeline pump provided by the present invention, the distance between the top surface of the first groove and the top surface of the second groove at the outlet end of the second shear flow channel is smaller than the distance between the outer wall surface of the rotor housing and the inner wall surface of the stator housing at the annular flow channel.

[0017] According to an integrated pipeline pump provided by the present invention, the end face of the rotor housing at the outlet flow channel is convexly formed with a plurality of coaxially arranged third annular ribs, and the side groove wall surface of the first annular groove is convexly formed with a plurality of coaxially arranged fourth annular ribs, and the third annular ribs are located in the area surrounded by two adjacent fourth annular ribs.

[0018] According to an integrated pipeline pump provided by the present invention, the outer wall surface of at least one of the third annular convex ribs is provided with a plurality of inclined grooves arranged in a circular array, and the plurality of inclined grooves form a de-cyclonic flow channel.

[0019] The integrated pipeline pump provided by the present invention has an inlet flow channel, an annular flow channel and an outlet flow channel for cooling the motor assembly formed between the rotor housing, the stator housing and the pump housing; one end face of the rotor housing is convexly provided with a plurality of coaxially arranged first annular ribs; the side groove wall surface of the first annular groove is convexly provided with a plurality of coaxially arranged second annular ribs; a first shear flow channel is formed between the side wall surface of at least one first annular rib and the side wall surface of the adjacent second annular rib, which can shear, squeeze and crush large-sized impurities in the cooling fluid into small-sized impurities, effectively preventing the impurities from scratching the stator housing and the rotor housing, thereby facilitating improving the reliability of the operation of the integrated pipeline pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a cross-sectional schematic diagram of the integrated pipeline pump provided by the present invention;

[0022] Figure 2 The present invention shows Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0023] Figure 3 The present invention shows Figure 2 A schematic diagram of the structure of the inlet flow channel;

[0024] Figure 4 is a cross-sectional schematic diagram of a first shear flow channel provided by the present invention;

[0025] Figure 5 is a cross-sectional schematic diagram of a second shear flow channel provided by the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the outlet flow channel provided by the present invention;

[0027] Figure markings: 1: pump housing; 101: second annular rib; 102: second groove; 103: second corrugated groove; 2: stator assembly; 201: stator housing; 3: rotor assembly; 301: rotor housing; 302: first annular rib; 303: first groove; 304: first corrugated groove; 305: third annular rib; 306: inclined groove; 4: impeller; 5: stationary impeller; 6: support shaft; 7: cooling channel; 8: inlet channel; 9: first shear channel; 10: second shear channel; 11: annular channel; 12: outlet channel; 13: columnar body. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Combine the following Figures 1 to 6 An integrated pipeline pump according to an embodiment of the present invention is described.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, the integrated pipeline pump provided by the embodiment of the present invention includes: a pump housing 1, a pump impeller 4, a rotor assembly 3 and a stator assembly 2; a support shaft 6 coaxially arranged therewith is provided in the pump housing 1, and the pump impeller 4 is rotatably connected to the support shaft 6; the rotor assembly 3 is connected to the rim of the pump impeller 4, the rotor assembly 3 includes a rotor housing 301, and the stator assembly 2 includes a stator housing 201; the inner wall surface of the pump housing 1 is provided with a first annular groove and a second annular groove interconnected with each other, the rotor assembly 3 is located in the first annular groove, the stator assembly 2 is located in the second annular groove, and is arranged opposite to the rotor assembly 3; the rotor housing An inlet flow channel 8, an annular flow channel 11 and an outlet flow channel 12 which are interconnected are formed between the body 301, the stator housing 201 and the pump housing 1; a plurality of coaxially arranged first annular convex ribs 302 are convexly formed on the end face of the rotor housing 301 at the inlet flow channel 8, and a plurality of coaxially arranged second annular convex ribs 101 are convexly formed on the side groove wall surface of the first annular groove, and the first annular convex rib 302 is located in the area surrounded by two adjacent second annular convex ribs 101, and a first shear flow channel 9 is formed between the side wall surface of at least one first annular convex rib 302 and the side wall surface of the adjacent second annular convex rib 101.

[0032] Specifically, a support shaft 6 arranged along the axis of the pump housing 1 is provided inside the pump housing 1, and the pump impeller 4 is rotatably connected to the support shaft 6 through a bearing assembly. The two opposite ends of the pump housing 1 are defined as the inlet end of the pump housing 1 and the outlet end of the pump housing 1, and the fluid flows in from the inlet end of the pump housing 1 and flows out from the outlet end of the pump housing 1. The motor assembly includes a rotor assembly 3 and a stator assembly 2, and the rotor assembly 3 includes a rotor and a rotor housing 301, and the rotor is built in the rotor housing 301, and the rotor housing 301 is a shielding sleeve of the rotor; the stator assembly 2 includes a stator and a stator housing 201, and the stator is built in the stator housing 201, and the stator housing 201 is a shielding sleeve of the stator, and the stator housing 201 and the rotor housing 301 are coaxially arranged with the pump housing 1.

[0033] A first annular groove and a second annular groove that are interconnected are formed by the inner wall surface of the pump housing 1 being recessed toward the outer wall surface of the pump housing 1. The first annular groove forms an accommodating space for placing the rotor assembly 3. Gaps are respectively left between the two opposite end surfaces of the rotor housing 301 and the two side groove walls opposite to the first annular groove. The two opposite end surfaces of the rotor housing 301 and the two side groove walls opposite to the first annular groove form an inlet flow channel 8 and an outlet flow channel 12 for the cooling fluid to pass through. The second annular groove forms a accommodating space for placing the stator assembly 2, the outer wall surface of the stator housing 201 is fitted with the groove bottom surface of the second annular groove, and the two opposite end surfaces of the stator housing 201 are fitted with the two side groove walls of the second annular groove. An annular flow channel 11 is formed between the inner wall surface of the stator housing 201 and the outer wall surface of the rotor housing 301, and the inlet flow channel 8, the annular flow channel 11 and the outlet flow channel 12 are connected in sequence. The inlet flow channel 8, the annular flow channel and the outlet flow channel 12 form a cooling flow channel 7 for cooling the motor assembly. At the same time, the annular flow channel 11 is also an air gap channel between the stator assembly 2 and the rotor assembly 3.

[0034] The inlet flow channel 8 is located at the outlet end of the pump housing 1, and the outlet flow channel 12 is located at the inlet end of the pump housing 1. When pumping fluid, the rotor assembly 3 drives the pump impeller 4 to rotate and do work and increase the pressure of the fluid. The flow field pressure at the rear end of the pump impeller 4 is higher than the flow field pressure at the front end of the pump impeller 4. The rear end of the pump impeller 4 is close to the outlet end of the pump housing 1, and the front end of the pump impeller 4 is close to the inlet end of the pump housing 1. Driven by this pressure difference, part of the fluid in the pump housing 1 flows in from the inlet flow channel 8, and fully exchanges heat with the rotor assembly 3 and the stator assembly 2 during the process of flowing through the annular flow channel 11, and then flows out from the outlet flow channel 12 to the channel of the pump housing 1, and the heat generated by the motor assembly due to copper loss, iron loss and friction loss is discharged. This part of the fluid that flows through the inlet flow channel 8, the annular flow channel 11 and the outlet flow channel 12 in sequence is defined as a cooling fluid. A stationary impeller 5 is also installed in the pump housing 1 . The stationary impeller 5 is close to the outlet end of the pump housing 1 . The stationary impeller 5 is used to recover the circumferential velocity of the fluid, increase the static pressure of the fluid, and then transport the fluid out of the outlet end of the pump housing 1 .

[0035] The motor assembly drives the pump impeller 4 to rotate and work to pump the fluid. Impurities such as mud and sand may exist in the fluid. The impurities enter the cooling channel 7 along with the cooling fluid. When the rotor assembly 3 rotates at a high speed, the impurities can easily scratch the rotor housing 301 and the stator housing 201, causing the motor assembly to be flooded and burned. At the same time, the impurities also affect the rotation stability of the rotor assembly 3.

[0036] The end surface of the rotor housing 301 at the inlet flow channel 8 is convexly formed with a plurality of first annular convex ribs 302 coaxial with the axis of the rotor housing 301, and the number of the first annular convex ribs 302 is set according to actual needs. The side groove wall surface of the first annular groove at the inlet flow channel 8 is convexly formed with a plurality of second annular convex ribs 101 coaxial with the axis of the pump housing 1, and the number of the second annular convex ribs 101 is set according to actual needs. An accommodating space for accommodating the first annular convex ribs 302 is formed between two adjacent second annular convex ribs 101. It can be understood that the first annular convex ribs 302 and the second annular convex ribs 101 are clearance-matched to meet the rotation requirements of the rotor assembly 3. A first shearing flow channel 9 for shearing, extruding and crushing impurities is formed between the side wall surface of at least one first annular convex rib 302 and the side wall surface of the adjacent second annular convex rib 101. A periodically changing "expanding-reducing" flow channel area is formed along the circumferential direction between the side wall surface of the first annular convex rib 302 and the side wall surface of the second annular convex rib 101. When the rotor assembly 3 rotates, large-sized impurities entrained by the cooling fluid enter this flow channel area and are sheared, squeezed and crushed into small-sized impurities under the interaction of the side wall surface of the first annular convex rib 302 and the side wall surface of the second annular convex rib 101. The small-sized impurities continue to flow with the cooling fluid and finally flow out from the outlet flow channel 12.

[0037] When the cooling fluid flows through the inlet flow channel 8, large-sized impurities in the cooling fluid can be sheared, squeezed and broken into small-sized impurities at the first shear flow channel 9. When the cooling fluid flows through the annular flow channel 11, scratches on the stator housing 201 and the rotor housing 301 can be effectively avoided, which is beneficial to improving the reliability of the operation of the integrated pipeline pump.

[0038] In the embodiment of the present invention, an inlet flow channel 8, an annular flow channel 11 and an outlet flow channel 12 for cooling the motor assembly are formed between the rotor housing 301, the stator housing 201 and the pump housing 1. A plurality of coaxially arranged first annular ribs 302 are convexly provided on one end face of the rotor housing 301. A plurality of coaxially arranged second annular ribs 101 are convexly provided on the side groove wall of the first annular groove. A first shear flow channel 9 is formed between the side wall surface of at least one first annular rib 302 and the side wall surface of the adjacent second annular rib 101, which can shear, squeeze and crush large-sized impurities in the cooling fluid into small-sized impurities, effectively preventing impurities from scratching the stator housing 201 and the rotor housing 301, thereby facilitating improving the reliability of the operation of the integrated pipeline pump.

[0039] like Figure 4As shown, in an optional embodiment, the side wall surface of the first annular convex rib 302 is provided with a plurality of first grooves 303 arranged in a circular array, and the side wall surface of the second annular convex rib 101 is provided with a plurality of second grooves 102 arranged in a circular array, and the first grooves 303 and the second grooves 102 are arranged in a one-to-one correspondence, and the plurality of first grooves 303 and the plurality of second grooves 102 form a first shear flow channel 9 between the side wall surface of the first annular convex rib 302 and the side wall surface of the adjacent second annular convex rib 101.

[0040] Specifically, the side wall surface of the first annular convex rib 302 is provided with a first groove 303, the extension direction of the first groove 303 is consistent with the axis direction of the first annular convex rib 302, the axis of the first annular convex rib 302 is coaxial with the axis of the rotor housing 301, and multiple first grooves 303 are arranged in a circular array on the side wall surface of the first annular convex rib 302. The side wall surface of the second annular convex rib 101 is provided with a second groove 102, the extension direction of the second groove 102 is consistent with the axis direction of the second annular convex rib 101, the axis of the second annular convex rib 101 is coaxial with the axis of the pump housing 1, and multiple second grooves 102 are arranged in a circular array on the side wall surface of the second annular convex rib 101.

[0041] The top surface sandwiched between two adjacent first grooves 303 is defined as the top surface of the first groove, and the top surface sandwiched between two adjacent second grooves 102 is defined as the top surface of the second groove. The first groove 303 and the second groove 102 are arranged one-to-one, and the top surface of the first groove and the top surface of the second groove are arranged one-to-one. The spacing between the groove bottom of the first groove 303 and the groove bottom of the second groove 102 is defined as the first spacing, and the spacing between the top surface of the first groove and the top surface of the second groove is defined as the second spacing. Multiple first grooves 303 and multiple second grooves 102 form a first gap area arranged in a circular array, and multiple first groove top surfaces and multiple second groove top surfaces form a second gap area arranged in a circular array, thereby forming a periodically changing "expanding-shrinking" flow channel area along the circumferential direction between the side wall surface of the first annular convex rib 302 and the side wall surface of the second annular convex rib 101. During the rotation of the rotor assembly 3, impurities flow in the first gap area and the second gap area that are spaced apart. Under the interaction between the groove wall surface of the first groove 303 and the groove wall surface of the second groove 102, large-sized impurities are sheared, squeezed and crushed into small-sized impurities.

[0042] The end surface of the rotor housing 301 is convexly formed with a plurality of first annular convex ribs 302, and the side groove wall surface of the first annular groove is convexly formed with a plurality of second annular convex ribs 101. The side wall surface of the first annular convex rib 302 near the inlet end of the inlet flow channel 8 is provided with a plurality of first grooves 303 arranged in a circular array, and the side wall surface of the second annular convex rib 101 near the inlet end of the inlet flow channel 8 is provided with a plurality of second grooves 102 arranged in a circular array. Thus, a first shear flow channel 9 is formed between the side wall surface of the first annular convex rib 302 near the inlet end of the inlet flow channel 8 and the side wall surface of the second annular convex rib 101, which can not only meet the needs of shearing and extruding and crushing impurities, but also avoid increasing the flow resistance of the cooling fluid in the inlet flow channel 8.

[0043] In the embodiment of the present invention, the side wall surface of the first annular convex rib 302 is provided with a plurality of first grooves 303 arranged in a circular array, and the side wall surface of the second annular convex rib 101 is provided with a plurality of second grooves 102 arranged in a circular array. A first shear flow channel 9 is formed between the side wall surfaces of two adjacent first annular convex ribs 302 and the side wall surfaces of the second annular convex rib 101. The first shear flow channel 9 has a simple structure and can effectively shear, extrude and crush large-sized impurities in the cooling fluid into small-sized impurities, thereby ensuring the reliability of the operation of the integrated pipeline pump.

[0044] like Figure 4 As shown, in an optional embodiment, the first groove 303 is V-shaped, and the second groove 102 is U-shaped.

[0045] Specifically, the first grooves 303 arranged in a circular array formed on the side wall surface of the first annular convex rib 302 are V-shaped, and the two groove walls of the first groove 303 form a V-shape to provide shear force for shearing impurities; the second grooves 102 arranged in a circular array formed on the side wall surface of the second annular convex rib 101 are U-shaped, that is, the angle between the groove bottom surface and the groove wall surface of the second groove 102 is close to 90 degrees. During the rotation of the rotor assembly 3, the groove wall surface of the first groove 303 is in full contact with the impurities, and the groove wall surface of the second groove 102 can suppress the circumferential slip of the impurities during the shearing process, thereby enabling the impurities to be fully sheared, squeezed and crushed under the joint action of the groove wall surface of the first groove 303 and the groove wall surface of the second groove 102.

[0046] like Figure 2 , Figure 3 and Figure 5As shown, in an optional embodiment, a second shear flow channel 10 is provided between the outlet end of the inlet flow channel 8 and the inlet end of the annular flow channel 11; the outer wall surface of the rotor housing 301 is provided with a plurality of first corrugated grooves 304 arranged in a circular array, and the groove bottom surface of the first annular groove is provided with a plurality of second corrugated grooves 103 arranged in a circular array, and the first corrugated grooves 304 and the second corrugated grooves 103 are arranged one by one, and the plurality of first corrugated grooves 304 and the plurality of second corrugated grooves 103 form a second shear flow channel 10 between the outer wall surface of the rotor housing 301 and the groove bottom surface of the first annular groove.

[0047] Specifically, the second shear channel 10 is formed between the outer wall surface of the rotor housing 301 near the outlet end of the inlet channel 8 and the groove bottom surface of the first annular groove near the outlet end of the inlet channel 8. The outer wall surface of the rotor housing 301 is concave to form a first corrugated groove 304, the extension direction of the first corrugated groove 304 can be consistent with the axial direction of the rotor housing 301, and the extension direction of the first corrugated groove 304 can also form a certain angle with the axial direction of the rotor housing 301. The length of the first corrugated groove 304 is set according to actual needs, and multiple first corrugated grooves 304 are arranged in a circular array on the outer wall surface of the rotor housing 301. The bottom surface of the first annular groove is recessed to form a second corrugated groove 103. The extension direction of the second corrugated groove 103 can be consistent with the axial direction of the pump housing 1. The extension direction of the second corrugated groove 103 can also form a certain angle with the axial direction of the pump housing 1. The length of the second corrugated groove 103 is adapted to the length of the first corrugated groove 304. A plurality of second corrugated grooves 103 are arranged in a circular array on the bottom surface of the first annular groove.

[0048] The top surface sandwiched between two adjacent first corrugated grooves 304 is defined as the top surface of the first groove, and the top surface sandwiched between two adjacent second corrugated grooves 103 is defined as the top surface of the second groove. The first corrugated groove 304 and the second corrugated groove 103 are arranged one-to-one, and the top surface of the first groove and the top surface of the second groove are arranged one-to-one. The spacing between the groove bottom of the first corrugated groove 304 and the groove bottom of the second corrugated groove 103 is defined as the third spacing, and the spacing between the top surface of the first groove and the top surface of the second groove is defined as the fourth spacing. A plurality of first corrugated grooves 304 and a plurality of second corrugated grooves 103 form a third gap region arranged in a circular array, and a plurality of first groove top surfaces and a plurality of second groove top surfaces form a fourth gap region arranged in a circular array, thereby forming a periodically changing "expanding-shrinking" flow channel region along the circumferential direction between the outer wall surface of the rotor housing 301 and the groove bottom surface of the first annular groove. During the rotation of the rotor assembly 3, when the impurities flow in the third gap area and the fourth gap area arranged at intervals, the small-sized impurities flowing through the first shearing channel 9 can be further sheared, squeezed and crushed into fine-sized impurities under the interaction of the groove wall surface of the first corrugated groove 304 and the groove wall surface of the second corrugated groove 103. The fine-sized impurities can effectively avoid scratching the rotor housing 301 and the stator housing 201 when flowing through the annular channel 11 with the cooling fluid, and it is also conducive to the miniaturization design of the air gap channel between the outer wall surface of the rotor housing 301 and the inner wall surface of the stator housing 201.

[0049] Furthermore, a columnar body 13 of a certain length may be arranged between the end surface of the rotor housing 301 and the side groove wall surface of the first annular groove, the first corrugated groove 304 may be arranged on the outer wall surface of the columnar body 13, and the second corrugated groove 103 may be arranged on the groove bottom surface of the first annular groove corresponding to the columnar body 13. In the process of shearing, squeezing and crushing impurities in the second shearing flow channel 10, the impurities may be prevented from scratching the rotor housing 301.

[0050] In an embodiment of the present invention, the outer wall surface of the rotor housing 301 near the outlet end of the inlet flow channel 8 is provided with a plurality of first corrugated grooves 304 arranged in a circular array, and the groove bottom surface of the first annular groove is provided with a plurality of second corrugated grooves 103 arranged in a circular array. The plurality of first corrugated grooves 304 and the plurality of second corrugated grooves 103 form a second shear flow channel 10 between the outer wall surface of the rotor housing 301 and the groove bottom surface of the first annular groove. During the flow of the cooling fluid, the first shear flow channel 9 shears and crushes large-sized impurities in the cooling fluid into small-sized impurities, and the small-sized impurities are further sheared and crushed into fine-sized impurities after flowing through the second shear flow channel 10. This can effectively avoid scratching the rotor housing 301 and the stator housing 201 in the process of flowing through the annular flow channel 11, which is beneficial to further improve the reliability of the operation of the integrated pipeline pump, and is also beneficial to the miniaturized design of the air gap channel of the motor component, which is beneficial to improve the working efficiency of the integrated pipeline pump.

[0051] In an optional embodiment, the first corrugated groove 304 is provided on the outer wall surface of the rotor housing 301 in an inclined shape, and the second corrugated groove 103 is provided on the groove bottom surface of the first annular groove in an inclined shape.

[0052] Specifically, the extension direction of the first corrugated groove 304 on the outer wall of the rotor housing 301 is at a certain angle to the axial direction of the rotor housing 301, that is, the first corrugated groove 304 is arranged on the outer wall of the rotor housing 301 in an inclined manner, and the rotor housing 301 is coaxial with the pump housing 1; the extension direction of the second corrugated groove 103 on the groove bottom surface of the first annular groove is also at a certain angle to the axial direction of the pump housing 1, that is, the second corrugated groove 103 is arranged on the groove bottom surface of the first annular groove in an inclined manner. Therefore, during the rotation of the rotor assembly 3, at any time, the first groove top surface and the second groove top surface are in a facing position between the outer wall of the rotor housing 301 and the groove bottom surface of the first annular groove, which can effectively prevent large-size impurities from directly passing through the position where the flow channel interface formed by the groove bottom of the first corrugated groove 304 and the groove bottom of the second corrugated groove 103 is larger, further improving the reliability of the operation of the integrated pipeline pump.

[0053] like Figure 3 As shown, in an optional embodiment, a first groove top surface is formed between two adjacent first corrugated grooves 304, and a second groove top surface is formed between two adjacent second corrugated grooves 103, and the distance between the first groove top surface and the second groove top surface gradually decreases from the inlet end of the second shear channel 10 to the outlet end of the second shear channel 10.

[0054] Specifically, the top surface sandwiched between two adjacent first corrugated grooves 304 is defined as the top surface of the first groove, and the top surface sandwiched between two adjacent second corrugated grooves 103 is defined as the top surface of the second groove, and the spacing between the top surface of the first groove and the top surface of the second groove gradually decreases from the inlet end of the second shearing flow channel 10 to the outlet end of the second shearing flow channel 10 along the axial direction of the second shearing flow channel 10. In the process of impurities flowing from the inlet end of the second shearing flow channel 10 toward the outlet end of the second shearing flow channel 10 along with the cooling fluid, the shearing, extrusion and crushing degree of the impurities by the groove wall surface of the first corrugated groove 304 and the groove wall surface of the second corrugated groove 103 is gradually strengthened, which is conducive to gradually miniaturizing the impurities, further enhancing the miniaturization of the impurities, and avoiding scratching the rotor housing 301 and the stator housing 201.

[0055] In an optional embodiment, the distance between the first groove top surface and the second groove top surface at the inlet end of the second shear flow channel 10 is greater than the distance between the outer wall surface of the rotor housing 301 and the groove bottom surface of the first annular groove at the outlet end of the inlet flow channel 8.

[0056] Specifically, the distance between the top surface of the first groove and the top surface of the second groove at the inlet end of the second shear channel 10 is greater than the distance between the outer wall surface of the rotor housing 301 and the bottom surface of the groove of the first annular groove at the outlet end of the inlet channel 8, so that impurities flowing out from the outlet end of the inlet channel 8 can smoothly enter the second shear channel 10 as the cooling fluid flows further, effectively preventing impurities from being stuck between the outer wall surface of the rotor housing 301 and the bottom surface of the groove of the first annular groove, thereby affecting the rotation of the rotor assembly 3, thereby ensuring the reliability of the operation of the rotor assembly 3.

[0057] In an optional embodiment, the distance between the first groove top surface and the second groove top surface at the outlet end of the second shear flow channel 10 is smaller than the distance between the outer wall surface of the rotor housing 301 and the inner wall surface of the stator housing 201 at the annular flow channel 11.

[0058] Specifically, at the outlet end of the second shearing channel 10, the distance between the top surface of the first groove and the top surface of the second groove is smaller than the distance between the outer wall surface of the rotor housing 301 and the inner wall surface of the stator housing 201. Impurities flow from the inlet end of the second shearing channel 10 to the outlet end of the second shearing channel 10 and are sheared, squeezed and crushed into fine impurities. The size of the fine impurities is smaller than the gap size of the annular channel 11, which is the gap size between the outer wall surface of the rotor housing 301 and the inner wall surface of the stator housing 201. As a result, the fine impurities can further flow smoothly along the annular channel 11 with the cooling fluid, and finally flow out from the outlet channel 12, which is conducive to further ensuring the reliability of the operation of the rotor assembly 3.

[0059] like Figure 2 As shown, in an optional embodiment, the end surface of the rotor housing 301 at the outlet flow channel 12 is convexly formed with a plurality of coaxially arranged third annular ribs 305, and the side groove wall surface of the first annular groove is convexly formed with a plurality of coaxially arranged fourth annular ribs, and the third annular rib 305 is located in the area surrounded by two adjacent fourth annular ribs.

[0060] Specifically, the end surface of the rotor housing 301 at the outlet flow channel 12 is convexly formed with a plurality of third annular convex ribs 305 coaxial with the axis of the pump housing 1, and the number of the third annular convex ribs 305 is set according to actual needs, and the side groove wall surface of the first annular groove at the outlet flow channel 12 is convexly formed with a plurality of fourth annular convex ribs coaxial with the axis of the pump housing 1, and the number of the fourth annular convex ribs is set according to actual needs. An accommodating space for accommodating the third annular convex ribs 305 is formed between two adjacent fourth annular convex ribs, and it can be understood that the third annular convex ribs 305 and the fourth annular convex ribs are clearance-matched to meet the rotation requirements of the rotor assembly 3.

[0061] Thus, the plurality of third annular ribs 305 and the plurality of fourth annular ribs form a labyrinth flow channel, which has a simple structure and can effectively prevent impurities in the fluid from entering the cooling flow channel 7 from the outlet flow channel 12, thereby ensuring the reliability of the operation of the integrated pipeline pump.

[0062] like Figure 6 As shown, in an optional embodiment, the outer wall surface of at least one third annular convex rib 305 is provided with a plurality of inclined grooves 306 arranged in a circular array, and the plurality of inclined grooves 306 form a de-rotation flow channel.

[0063] Specifically, an inclined groove 306 is formed on the outer wall surface of the third annular convex rib 305 , and a plurality of inclined grooves 306 are arranged in a circular array on the outer wall surface of the third annular convex rib 305 . The extending direction of the inclined grooves 306 is opposite to the rotation direction of the rotor assembly 3 .

[0064] When the cooling fluid flows in the cooling channel 7, due to the high-speed rotation of the rotor assembly 3, under the action of the Coriolis force and the shear force, the cooling fluid will generate a velocity vector in the circumferential direction, so that when the cooling fluid is discharged through the cooling channel 7, a turbulent flow in the circumferential direction is introduced into the flow field of the leading edge area of ​​the pump impeller 4, thereby destroying the flow field of the leading edge area of ​​the pump impeller 4 and affecting the working performance of the integrated pipeline pump.

[0065] The outer wall surface of the third annular convex rib 305 is provided with a plurality of inclined grooves 306 arranged in a circular array. The extension direction of the inclined grooves 306 is opposite to the rotation direction of the rotor assembly 3. The reverse velocity component generated by the extrusion and shearing effect of the narrow gap flow field when the rotor assembly 3 rotates is utilized to offset the circumferential velocity component caused by the rotational motion of the rotor assembly 3, thereby correcting the cooling fluid velocity at the outlet end of the outlet flow channel 12 and improving the pumping performance of the integrated pipeline pump.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated pipeline pump, characterized in that: include: Pump housing, pump impeller, rotor assembly, and stator assembly; A support shaft coaxially arranged therewith is provided in the pump housing, and the pump impeller is rotatably connected to the support shaft; the rotor assembly is connected to the rim of the pump impeller, the rotor assembly includes a rotor housing, and the stator assembly includes a stator housing; The inner wall surface of the pump housing is provided with a first annular groove and a second annular groove which are interconnected, the rotor assembly is located in the first annular groove, and the stator assembly is located in the second annular groove and arranged opposite to the rotor assembly; an inlet flow channel, an annular flow channel and an outlet flow channel which are interconnected are formed between the rotor housing, the stator housing and the pump housing; The end surface of the rotor housing at the inlet flow channel is convexly formed with a plurality of coaxially arranged first annular convex ribs, and the side groove wall surface of the first annular groove is convexly formed with a plurality of coaxially arranged second annular convex ribs, the first annular convex rib is located in the area surrounded by two adjacent second annular convex ribs, and a first shear flow channel is formed between the side wall surface of at least one of the first annular convex ribs and the side wall surface of the adjacent second annular convex rib; The side wall surface of the first annular convex rib is provided with a plurality of first grooves arranged in a circular array, and the side wall surface of the second annular convex rib is provided with a plurality of second grooves arranged in a circular array, the first grooves and the second grooves are arranged in a one-to-one correspondence, and the plurality of first grooves and the plurality of second grooves form the first shear flow channel between the side wall surface of the first annular convex rib and the side wall surface of the adjacent second annular convex rib; A second shear channel is provided between the outlet end of the inlet channel and the inlet end of the annular channel; The outer wall surface of the rotor shell is provided with a plurality of first corrugated grooves arranged in a circular array, and the groove bottom surface of the first annular groove is provided with a plurality of second corrugated grooves arranged in a circular array, the first corrugated grooves and the second corrugated grooves are arranged one by one, and the plurality of first corrugated grooves and the plurality of second corrugated grooves form the second shear flow channel between the outer wall surface of the rotor shell and the groove bottom surface of the first annular groove.

2. The integrated pipeline pump according to claim 1, characterized in that: The first groove is V-shaped, and the second groove is U-shaped.

3. The integrated pipeline pump according to claim 1, characterized in that: The first corrugated groove is arranged on the outer wall surface of the rotor housing in an inclined shape, and the second corrugated groove is arranged on the groove bottom surface of the first annular groove in an inclined shape.

4. The integrated pipeline pump according to claim 1, characterized in that: A first groove top surface is formed between two adjacent first corrugated grooves, and a second groove top surface is formed between two adjacent second corrugated grooves. The distance between the first groove top surface and the second groove top surface gradually decreases from the inlet end to the outlet end of the second shear flow channel.

5. The integrated pipeline pump according to claim 4, characterized in that: The distance between the first groove top surface and the second groove top surface at the inlet end of the second shear flow channel is greater than the distance between the outer wall surface of the rotor housing and the groove bottom surface of the first annular groove at the outlet end of the inlet flow channel.

6. The integrated pipeline pump according to claim 5, characterized in that: The distance between the first groove top surface and the second groove top surface at the outlet end of the second shear flow channel is smaller than the distance between the outer wall surface of the rotor housing and the inner wall surface of the stator housing at the annular flow channel.

7. The integrated pipeline pump according to claim 1, characterized in that: The end surface of the rotor housing at the outlet flow channel is convexly formed with a plurality of coaxially arranged third annular ribs, and the side groove wall surface of the first annular groove is convexly formed with a plurality of coaxially arranged fourth annular ribs, and the third annular ribs are located in the area surrounded by two adjacent fourth annular ribs.

8. The integrated pipeline pump according to claim 7, characterized in that: The outer wall surface of at least one of the third annular convex ribs is provided with a plurality of inclined grooves arranged in a circular array, and the plurality of inclined grooves form a de-rotation flow channel.

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