Horizontal liquid cooling multistage shield pump

Abstract

The utility model belongs to the technical field of multi-stage shield pumps, in particular to a horizontal liquid-cooled multi-stage shield pump, which comprises a pump body, a liquid-cooled motor and a controller, a first-stage guide vane, an impeller, a middle guide vane, a shaft sleeve body, a last-stage guide vane, an elastic column and a balancing drum are arranged in the pump body, and the pump body is equipped with a base; the liquid-cooled motor comprises a stator component. The stator component comprises a motor front end cover, a casing, a winding iron core, a stator shielding sleeve and a motor rear end cover; the liquid cooling motor penetrates through the outer portion of the pump body through a machine shell of a stator component of the liquid cooling motor, the liquid cooling motor is directly embedded into the pump body, cooling is carried out in the flowing-out process through pumped media, and efficient cooling of the motor is achieved; according to the design, the temperature of the motor during operation is remarkably reduced, the operation efficiency and stability of the motor are improved, and the service life of the motor is prolonged; and meanwhile, the circuit board of the controller is cooled by utilizing the internal circulation medium, so that the thermal management capability of the whole system is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-stage shielded pumps, in particular to a horizontal liquid-cooled multi-stage shielded pump. Background Art

[0002] Shielded pumps, as leak-free pumps, are essential for liquid cooling. However, traditional vertical and horizontal multistage pumps are currently widely used in energy storage, computer cooling, and other fields. These pumps have the following characteristics: First, the shaft seals are mechanical, which poses a risk of leakage. Once leaked, they can cause irreversible damage to the entire system and even cause fires. Second, heat dissipation by heat radiation alone is ineffective in closed or poorly ventilated environments. Long-term high-temperature operation of the motor accelerates the aging of coils and cables, and in severe cases, can cause demagnetization of the motor magnets, shortening the pump's service life. Third, water-cooled motors, as the circulating water itself consumes some of the motor's power, result in low pump efficiency and high energy consumption. Furthermore, the cooling water channels of water-cooled motors are prone to scaling, which can block the flow path, causing cooling failure and damaging the motor. Fourth, traditional vertical and horizontal multistage pumps lack axial force balancing measures, with the bearings bearing all axial forces. During operation, the bearings run under high load for a long time, which accelerates bearing wear and reduces the service life of the pump; Fifth, traditional vertical multi-stage pumps and horizontal multi-stage pumps are large in size and difficult to install in some occasions with strict requirements on installation space.

[0003] Furthermore, traditional multi-stage pumps often suffer from structural design issues such as the separation of the motor and pump body, resulting in low integration. This not only increases system complexity and manufacturing costs, but also limits the device's application in compact spaces. Furthermore, the electrical connection between the motor and controller is often cumbersome, impacting the overall performance and reliability of the system. To address this, we offer a horizontal, liquid-cooled, multi-stage canned motor pump. Utility Model Content

[0004] In order to solve the above problems, the present invention proposes a horizontal liquid-cooled multi-stage canned motor pump to more accurately solve the problems raised in the above background technology.

[0005] The utility model is achieved through the following technical solutions:

[0006] The utility model proposes a horizontal liquid-cooled multi-stage canned motor pump, comprising a pump body, a liquid-cooled motor and a controller. The pump body is provided with a first-stage guide vane, an impeller, an intermediate guide vane, a shaft sleeve, a last-stage guide vane, an elastic column and a balance drum, and is equipped with a base.

[0007] The liquid-cooled motor includes a stator component;

[0008] The stator components include a motor front end cover, a housing, a winding core, a stator shielding sleeve and a motor rear end cover;

[0009] The liquid-cooled motor passes through the housing of its stator component and the outside of the pump body to form a water outlet channel, so that the medium cools the motor during the outflow process.

[0010] Furthermore, the liquid-cooled motor further comprises a front bearing seat, a rear bearing seat 1, a rotor component and a rear bearing seat 2;

[0011] The rotor components include a shaft, an end plate, a rotor core and a rotor shield;

[0012] The rotor core and winding core are designed with a small diameter-to-length ratio, so that the liquid-cooled motor is placed inside the pump body;

[0013] The front bearing seat is provided with a mouth ring and a balancing hole, which together with the balancing drum, the rotor shielding sleeve, the gap of the stator shielding sleeve, a leakage hole of the rear bearing seat and the center hole of the shaft body constitute a balancing system, and the balancing system is borne by the balancing drum.

[0014] Furthermore, the front end cover of the liquid-cooled motor is designed as a transition part with the last-stage guide vane, and adopts a four-claw stop to closely match the last-stage guide vane.

[0015] Furthermore, the base is formed by bending a plate and is provided with a waist-shaped hole for connection with the pump body, so that the base can adapt to pump bodies of different lengths, thereby improving the versatility of the product.

[0016] Furthermore, the winding core and rotor core of the liquid-cooled motor are designed with a small diameter-to-length ratio, so that the liquid-cooled motor can be compactly placed inside the pump body;

[0017] The controller is equipped on the liquid-cooled motor; the controller includes a circuit board;

[0018] The circuit board is fixed on the rear end cover of the liquid-cooled motor and is used to cool the circuit board using an internal circulating medium.

[0019] Furthermore, the rotor core of the liquid-cooled motor is wrapped by an end plate and a rotor shielding sleeve, and the rotor shielding sleeve is fixed to the end plate by laser welding to prevent the rotor core from rusting.

[0020] Furthermore, the liquid-cooled motor further includes a bearing system;

[0021] The bearing system includes a thrust plate, a hexagon socket set screw, a thrust pad, a tolerance ring, a guide bearing and a guide sleeve, wherein the hexagon socket set screw fixes the thrust pad to the thrust plate, the guide bearing is press-fitted onto the rear bearing seat 2 through the tolerance ring, and is provided with a cooling groove to enhance the heat dissipation effect; the tolerance ring is used to compensate for dimensional changes caused by thermal expansion and contraction.

[0022] Furthermore, a flow channel is formed between the pump body and the liquid-cooled motor through the casing;

[0023] The liquid-cooled motor and the controller are electrically connected via a circuit board;

[0024] The controller is fixed on the rear end cover of the liquid-cooled motor to form a compact and efficient integrated system.

[0025] Beneficial effects of the utility model:

[0026] The utility model realizes efficient cooling of the motor by directly embedding the liquid-cooled motor into the pump body and utilizing the pumped medium for cooling during the outflow process. This design significantly reduces the temperature of the motor during operation, improves the operating efficiency and stability of the motor, and extends the service life of the motor. At the same time, the controller circuit board is also cooled by the internal circulation medium, further enhancing the thermal management capability of the entire system.

[0027] This utility model achieves a high degree of integration by optimizing the structural design of the motor and the pump body; the close integration of the motor and the controller not only saves space, but also simplifies the wiring and installation process of the system, reducing the overall cost; in addition, the close fit design of the front cover of the motor and the last-stage guide vane, as well as the universal design of the base, further improves the compactness and flexibility of the system, making it adaptable to a wider variety of application scenarios.

[0028] The liquid-cooled motor in the present invention effectively reduces the impact of axial force on the motor and improves the operating stability of the motor by adopting a rotor component with a small diameter-to-length ratio design and a precise balancing system; at the same time, the anti-rust measures of the rotor core, the precise design of the bearing system and the optimized electrical connection of the controller jointly ensure the reliability and durability of the entire system under high load and long-term operation; these design features make the horizontal liquid-cooled multi-stage shielded pump of this embodiment have higher reliability and lower maintenance costs in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a horizontal liquid-cooled multi-stage canned motor pump according to an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of a liquid-cooled motor according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of a horizontal liquid-cooled multi-stage canned motor pump balancing system according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic structural diagram of a stator component of a liquid-cooled motor according to an embodiment of the present utility model;

[0033] Figure 5 This is a schematic structural diagram of the rotor component of a liquid-cooled motor according to an embodiment of the present utility model;

[0034] Figure 6 This is a structural schematic diagram of a bearing system of a liquid-cooled motor according to an embodiment of the present utility model.

[0035] In the figure: 1. Pump body; 11. First-stage guide vane; 12. Impeller; 13. Intermediate guide vane; 14. Shaft sleeve body; 15. Last-stage guide vane; 16. Elastic column; 17. Balance drum; 18. Base; 2. Liquid-cooled motor; 21. Front bearing seat; 22. Stator component; 221. Motor front end cover; 222. Casing; 223. Winding core; 224. Stator shield sleeve; 225. Motor rear end cover; 23. Rotor component; 231. Shaft body; 232. End plate; 233. Rotor core; 234. Rotor shield sleeve; 24. Bearing system; 241. Thrust plate; 242. Hexagon socket set screw; 243. Thrust pad; 244. Tolerance ring; 245. Guide bearing; 246. Guide sleeve; 25. Rear bearing seat 1; 28. Rear bearing seat 2. DETAILED DESCRIPTION

[0036] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0037] Example

[0038] like Figures 1-4 As shown, a horizontal liquid-cooled multi-stage shielded pump proposed in one embodiment of the present invention is mainly composed of a pump body 1, a liquid-cooled motor 2 and a controller 3. The interior of the pump body 1 is carefully designed with multi-stage fluid channels, including a first-stage guide vane 11, an impeller 12, an intermediate guide vane 13, a shaft sleeve body 14, a final-stage guide vane 15, an elastic column 16 and a balance drum 17. These components work together to achieve efficient fluid transportation. A base 18 is provided at the bottom of the pump body 1 to support the entire pump body structure. The liquid-cooled motor 2 is connected to the outside of the pump body 1 through the casing 222 of its stator component 22, forming a unique water outlet channel, so that the pumped medium can cool the motor during the outflow process, effectively reducing the motor operating temperature and improving the reliability and service life of the equipment.

[0039] Furthermore, in addition to the basic stator assembly 22, the liquid-cooled motor 2 also features a front bearing block 21, a rear bearing block 1 25, a rotor assembly 23, and a rear bearing block 2 28. The rotor assembly 23 utilizes a shaft 231, end plate 232, rotor core 233, and rotor shield 234 with a low diameter-to-length ratio, resulting in a compact and efficient motor. In particular, the balancing holes in the front bearing block 21, along with the balance drum 17, rotor shield 234, and the gap between the stator shield 224, form a precise balancing system that effectively mitigates the effects of axial forces on the motor.

[0040] Furthermore, to enhance the seal and structural strength between the motor and pump body, the front end cover 221 of the liquid-cooled motor 2 is designed as a transition piece with the final-stage guide vanes 15, and a four-claw stop structure is used to achieve a tight fit. This design not only simplifies the assembly process but also improves the overall performance of the equipment.

[0041] Furthermore, to enhance the product's versatility and flexibility, the base 18 is manufactured using a sheet metal bending process and features multiple waist-shaped holes. These holes allow the base to adapt to pump bodies 1 of varying lengths, thus meeting the needs of diverse application scenarios. To create a compact and efficient integrated system, the controller 3 is directly integrated with the liquid-cooled motor 2. The circuit board 31 within the controller 3 is secured to the motor's rear end cover 225 and cooled using an internally circulating medium. This design not only saves space but also improves heat dissipation efficiency.

[0042] Furthermore, to prevent the rotor core 233 from rusting and affecting the motor's performance, it is enclosed by an end plate 232 and a rotor shield 234, which is then fixed to the end plate 232 using laser welding. This design effectively isolates the rotor core from the external environment, thereby preventing rust.

[0043] Furthermore, the bearing system 24 includes a thrust plate 241, a hexagon socket set screw 242, a thrust pad 243, a tolerance ring 244, a guide bearing 245, and a guide sleeve 246. The hexagon socket set screw 242 is used to secure the thrust pad 243 to the thrust plate 241. The guide bearing 245 is press-fitted onto the rear bearing seat 28 via the tolerance ring 244 and is provided with a cooling groove to enhance heat dissipation. The tolerance ring 244 is used to compensate for dimensional changes caused by thermal expansion and contraction.

[0044] Furthermore, a flow channel formed between the pump body 1 and the liquid-cooled motor 2 through the housing 222 ensures smooth medium delivery and effective motor cooling. Furthermore, an electrical connection between the liquid-cooled motor 2 and the controller 3 is established via the circuit board 31, ensuring the normal operation of the entire system. The controller 3 is fixed to the rear end cover 225 of the motor, forming a compact and efficient integrated system.

[0045] The working principle of the present invention is as follows: when the pump is started, the medium enters from the inlet of the pump body 1, first passes through the first-stage guide vane 11 for pre-swirl, and then enters the impeller 12 to obtain energy and accelerate; the accelerated medium undergoes energy conversion through the intermediate guide vane 13 to reduce flow loss, and continues to be transmitted to the next-stage impeller 12; after the repeated action of the multi-stage impeller 12 and the intermediate guide vane 13, the medium finally obtains sufficient pressure and flow, and flows out of the pump body 1 through the final guide vane 15; in the process of the medium flowing out of the pump body 1, it simultaneously flows through the outside of the casing 222 of the stator component 22 of the liquid-cooled motor 2, forming a unique water outlet flow channel; since the casing 222 penetrates the outside of the pump body 1, the medium can directly take away the heat generated by the motor during operation, thereby realizing internal cooling of the motor; the liquid-cooled motor 2 is cleverly placed inside the pump body 1 through its compact structural design, especially the small diameter-to-length ratio design of the rotor core 233 and the winding core 223; in order to ensure the stability of the motor under high-speed operation, the present invention is designed by the front bearing seat 21. A balancing system consisting of a balancing drum 17, a rotor shielding sleeve 234, and a gap between the stator shielding sleeve 224; the system bears the axial force through the balancing drum 17, effectively reducing the stress on the motor shaft 231 and extending the service life of the bearings and seals; the controller 3 is electrically connected to the liquid-cooled motor 2 through the circuit board 31 to control the start, stop and speed regulation functions of the motor; the circuit board 31 is fixed to the rear end cover 225 of the motor and is cooled by the internal circulation medium to ensure its stable operation and extend its service life; the base 18 is formed by bending the plate and is provided with a waist-shaped hole to adapt to pump bodies 1 of different lengths, thereby improving the versatility and flexibility of the product; the rotor core 233 is wrapped by the end plate 232 and the rotor shielding sleeve 234 and fixed by laser welding to prevent rust and protect the internal components of the motor; the bearing system 24 includes components such as the thrust plate 241, the thrust pad 243, and the guide bearing 245. Through precise matching and cooling groove design, the stability and durability of the motor under high-speed operation are ensured.

[0046] Finally, it should be noted that while the basic concepts have been described above, it should be apparent to those skilled in the art that the detailed disclosure is provided merely as an example and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and revisions to this specification. Such modifications, improvements, and revisions are suggested throughout this specification and remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe the embodiments of this specification. For example, terms such as "one embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different places in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined. Furthermore, unless expressly provided in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or other designations described in this specification are not intended to limit the order of the processes and methods of this specification.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A horizontal liquid-cooled multi-stage canned motor pump, characterized in that: The invention comprises a pump body (1), a liquid-cooled motor (2) and a controller (3); the pump body (1) is provided with a first-stage guide vane (11), an impeller (12), an intermediate guide vane (13), a sleeve body (14), a last-stage guide vane (15), an elastic column (16) and a balance drum (17), and is equipped with a base (18); The liquid-cooled motor (2) includes a stator component (22); The stator component (22) includes a motor front end cover (221), a housing (222), a winding core (223), a stator shielding sleeve (224) and a motor rear end cover (225); The liquid-cooled motor (2) penetrates the housing (222) of its stator component (22) and the outside of the pump body (1), forming a water outlet channel together, so that the medium cools the motor during the outflow process.

2. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The liquid-cooled motor (2) further comprises a front bearing seat (21), a rear bearing seat 1 (25), a rotor component (23) and a rear bearing seat 2 (28); The rotor component (23) includes a shaft (231), an end plate (232), a rotor core (233) and a rotor shielding sleeve (234); The rotor core (233) and the winding core (223) are designed with a small diameter-to-length ratio, so that the liquid-cooled motor (2) is placed inside the pump body (1); The front bearing seat (21) is provided with a mouth ring and a balancing hole, and together with the balancing drum (17), the rotor shielding sleeve (234), the gap of the stator shielding sleeve (224), the leakage hole of the rear bearing seat (25), and the center hole of the shaft body (231) form a balancing system, and the balancing system is borne by the balancing drum (17) The axial force.

3. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The front end cover (221) of the liquid-cooled motor (2) is designed as a transition part with the last-stage guide vane (15), and is tightly matched with the last-stage guide vane (15) by using a four-claw stop.

4. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The base (18) is formed by bending a plate and is provided with a waist-shaped hole for connection with the pump body (1). The base (18) can be adapted to pump bodies (1) of different lengths, thereby improving the versatility of the product.

5. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The winding core (223) and the rotor core (233) of the liquid-cooled motor (2) are designed with a small diameter-to-length ratio, so that the liquid-cooled motor (2) can be compactly placed inside the pump body (1); The controller (3) is equipped on the liquid-cooled motor (2); the controller (3) includes a circuit board (31); The circuit board (31) is fixed on the motor rear end cover (225) of the liquid-cooled motor (2) and is used to cool the circuit board (31) using an internal circulating medium.

6. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The rotor core (233) of the liquid-cooled motor (2) is wrapped by an end plate (232) and a rotor shielding sleeve (234); the rotor shielding sleeve (234) is fixed to the end plate (232) by laser welding to prevent the rotor core (233) from rusting.

7. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: The liquid-cooled motor (2) further includes a bearing system (24); The bearing system (24) includes a thrust plate (241), a hexagon socket set screw (242), a thrust pad (243), a tolerance ring (244), a guide bearing (245) and a guide sleeve (246), wherein the hexagon socket set screw (242) fixes the thrust pad (243) to the thrust plate (241), and the guide bearing (245) is press-fitted onto the rear bearing seat 2 (28) through the tolerance ring (244), and is provided with a cooling groove to enhance the heat dissipation effect; the tolerance ring (244) is used to compensate for dimensional changes caused by thermal expansion and contraction.

8. The horizontal liquid-cooled multi-stage canned motor pump according to claim 1, characterized in that: A flow channel is formed between the pump body (1) and the liquid-cooled motor (2) through the housing (222); The liquid-cooled motor (2) and the controller (3) are electrically connected via a circuit board (31); The controller (3) is fixed on the motor rear end cover (225) of the liquid-cooled motor (2) to form a compact and efficient integrated system.

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