Boiler water circulating pump

Abstract

The utility model discloses a boiler water circulating pump, and relates to the technical field of circulating pumps. The boiler water circulating pump comprises a pump shell assembly, a water pump assembly and a water pump assembly, the hot neck is detachably arranged below the pump shell assembly in the first direction; the motor shell is detachably arranged below the hot neck in the first direction; the motor cover is detachably arranged below the motor shell along the first direction; the hydraulic component is arranged in the pump shell assembly in the first direction; the rotor assembly is connected with the bottom of the hydraulic component in the first direction and arranged in the hot neck and the motor shell in an extending mode; and the stator assembly is connected with the rotor assembly and is located in the motor shell. The boiler water circulating pump solves the problems that an existing boiler water circulating pump is unreasonable in structural design and poor in using effect; and the problem of long delivery time caused by low product conversion flexibility is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circulating pump technical field especially relates to a boiler water circulating pump. BACKGROUND

[0002] Boiler water circulating pump is called BCP, BCP is the centrifugal pump that is arranged in the boiler evaporation system and bears high temperature and high pressure to make the working medium do forced flow, and main components have pressure-bearing pump shell, wet stator motor, heat exchanger and related instruments and meters composition. BCP is used for the start and stop of boiler unit and the stage that load is less than 35%. In addition, to meet the requirement of power grid peak shaving, under the condition of wide load or even full load, realize the smoke temperature and unit stable combustion performance promotion, remove nitrogen oxides in flue gas, unit flexibility transformation SCR process, BCP plays a crucial role in the boiler peak shaving and frequent start and stop, and the BCP product is challenged more.

[0003] The existing boiler water circulating pump has the problems of unreasonable structure design, poor use effect, low product conversion flexibility and long delivery time. At present, no effective solution has been proposed for the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a boiler water circulating pump to at least solve one of the problems in the prior art.

[0005] Technical scheme: a boiler water circulating pump comprises:

[0006] A pump shell assembly;

[0007] A hot neck is detachably arranged below the pump shell assembly along a first direction;

[0008] A motor shell is detachably arranged below the hot neck along the first direction;

[0009] A motor cover is detachably arranged below the motor shell along the first direction;

[0010] A hydraulic component is arranged in the pump shell assembly along the first direction;

[0011] A rotor assembly is connected with the bottom of the hydraulic component along the first direction and is arranged in the hot neck and the motor shell;

[0012] A stator assembly is connected with the rotor assembly and is arranged in the motor shell;

[0013] The pump shell assembly, the hot neck, the motor shell and the motor cover form a concentric accommodating cavity along the first direction, the hydraulic component, the rotor assembly and the stator assembly are sequentially arranged in the accommodating cavity according to a preset order, and the hydraulic component and the rotor assembly are provided with a motor main shaft.

[0014] Preferably, the pump shell assembly comprises a boiler water inlet end arranged along the first direction, and a boiler water outlet end arranged on one side of the boiler water inlet end.

[0015] Preferably, the pump shell assembly is further provided with a fairing assembly.

[0016] Preferably, the hydraulic component comprises an impeller assembly arranged in the fairing assembly and located below the fairing assembly, and the impeller assembly is connected to the top of the rotor assembly.

[0017] Preferably, the top of the hot neck is provided with an extension section connected to the impeller assembly and the motor main shaft respectively.

[0018] Preferably, the motor shell is provided with a pump end bearing chamber on one side close to the top, and the pump end bearing chamber is connected to the motor main shaft.

[0019] Preferably, the motor shell is provided with a cover end bearing chamber on one side close to the bottom, and the cover end bearing chamber is connected to the bottom of the motor main shaft.

[0020] Preferably, the bottom of the motor main shaft is further provided with a thrust disc.

[0021] Preferably, the upper and lower ends of the thrust disc are respectively provided with an upper thrust block and a lower thrust block.

[0022] Preferably, one side of the motor shell is further provided with a junction box assembly.

[0023] Beneficial effects: In the embodiment of the present application, the pump shell assembly, the hot neck, the motor shell and the motor cover form a concentric accommodating cavity along the first direction, the hydraulic component, the rotor assembly and the stator assembly are sequentially arranged in the accommodating cavity according to a preset order, and the hydraulic component and the rotor assembly are provided with a motor main shaft, which achieves the purpose of modularization and standardization, thereby realizing the technical effects of optimizing the structure and improving the product conversion flexibility, and further solving the technical problems of the existing boiler water circulating pump, such as unreasonable structure design, poor use effect, low product conversion flexibility and long delivery time. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1It is the sectional view of the boiler water circulating pump of the utility model.

[0025] The reference signs are:

[0026] 1, pump shell assembly;

[0027] 2, fairing assembly;

[0028] 3, hydraulic component;

[0029] 4, extension section;

[0030] 5, hot neck;

[0031] 6, pump end bearing chamber;

[0032] 7, motor shell;

[0033] 8, rotor assembly;

[0034] 9, stator assembly;

[0035] 10, cover end bearing chamber;

[0036] 11, thrust disc;

[0037] 12, motor cover;

[0038] 13, junction box assembly. DETAILED DESCRIPTION

[0039] In order to make the person skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0040] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0041] In addition, the terms "mounting", "setting", "provided with", "connecting", "connected", "sleeved" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] As shown in Figure 1 The present application relates to a boiler water circulating pump. The boiler water circulating pump comprises a pump shell assembly 1; the pump shell is the outer shell of the whole pump, mainly for sealing and supporting the internal components, carrying the working medium (such as water) and providing a suitable working environment for the hydraulic components 3, ensuring the structural stability and sealing of the pump, avoiding leakage of the working medium, and at the same time supporting the pressure and flow in the pump well.

[0044] A hot neck 5 is detachably arranged below the pump shell assembly 1 along the first direction; the hot neck 5 is a component connecting the pump shell and the motor shell 7, can bear the high-temperature and high-pressure working medium, is arranged below the pump shell and can be detached along the first direction (vertical direction), facilitating maintenance and replacement; through the detachable design, the hot neck 5 can be conveniently detached, cleaned or replaced during maintenance, while bearing the high temperature in the boiler system, ensuring good flow of heat and working medium.

[0045] A motor shell 7 is detachably arranged below the hot neck 5 along the first direction; the motor shell 7 mainly contains the motor and its related components, connects the hot neck 5 and the motor cover 12; as a motor protection shell, it ensures the normal working environment of the motor and avoids the motor from being subjected to external high temperature and corrosion.

[0046] The design of the motor shell 7 enhances the sealing and high-temperature resistance of the overall structure of the pump, protects the motor from the working medium or external environment, and improves the service life and stability of the motor.

[0047] A motor cover 12 is detachably arranged below the motor shell 7 along the first direction; the motor cover 12 is located below the motor shell 7, further sealing the motor and other electrical components, preventing high temperature or working medium from entering the internal motor and affecting the performance of the motor.

[0048] The function of the motor cover 12 is to increase the sealing of the motor part, prevent any water or steam from entering the internal motor, effectively prolong the service life of the motor and improve the safety.

[0049] The hydraulic component 3 is arranged in the pump shell assembly 1 along the first direction; the hydraulic component 3 is the core component in the pump and directly contacts with the working medium. It includes impeller, guide vane, pump shaft and other components, and the main function is to pump the working medium from the pump inlet to the outlet through rotation to provide the required water flow and pressure.

[0050] The hydraulic component 3 can improve the working efficiency of the pump, effectively reduce the water flow resistance and energy loss, and ensure the stability of the water circulation flow and pressure of the boiler system.

[0051] The rotor assembly 8 is connected to the bottom of the hydraulic component 3 along the first direction and extends into the hot neck 5 and the motor shell 7; the rotor assembly 8 is connected to the bottom of the hydraulic component 3 and extends into the hot neck 5 and the motor shell 7; it is usually composed of motor shaft, impeller and other components, and is the key component for converting mechanical energy generated by motor rotation into hydraulic energy.

[0052] The rotor assembly 8 ensures that the power of the motor can be effectively transmitted to the hydraulic component 3 to provide the required water flow and pressure. At the same time, the precision and stability of the rotor design directly affect the operating efficiency and reliability of the pump.

[0053] The stator assembly 9 is connected to the rotor assembly 8 and located in the motor shell 7; the stator assembly 9 is connected to the rotor assembly 8 and located in the motor shell 7, which is the static part of the motor, usually composed of stator core, winding and other components, and generates magnetic field to interact with the rotor to drive the rotor to rotate.

[0054] The stability and high efficiency of the stator are the key to ensure the smooth operation of the motor, which can improve the rotation efficiency of the motor, reduce energy loss, and ensure the continuous operation of the pump in high temperature and high pressure environment.

[0055] Among them, the pump shell assembly 1, the hot neck 5, the motor shell 7 and the motor cover 12 form a concentric accommodating cavity along the first direction, and the hydraulic component 3, the rotor assembly 8 and the stator assembly 9 are arranged in the accommodating cavity in a predetermined order, and the motor main shaft is arranged on the hydraulic component 3 and the rotor assembly 8. Through the modular design, it is convenient to disassemble and maintain, especially in high temperature environment, disassembling the assembly can reduce the damage to other parts. In addition, the assembly method in the predetermined order ensures the reasonable cooperation of each component, and maximizes the working efficiency and stability of the system.

[0056] Through the detachable modular structure, the problem that the traditional pump is difficult to disassemble and maintain is solved. The high temperature resistance and precise fit of each component improve the operating efficiency and safety of the pump, especially in a high temperature and high pressure environment, which can ensure the stability and reliability of the boiler water circulation system. Through the close combination of the motor and the hydraulic part, the energy conversion efficiency is also optimized, ensuring the efficient operation of the boiler evaporation system.

[0057] From the above description, it can be seen that the present application achieves the following technical effects:

[0058] In the embodiment of the present application, the pump housing assembly 1, the hot neck 5, the motor housing 7 and the motor cover 12 are arranged in the same center along the first direction to form a containing cavity, the hydraulic component 3, the rotor assembly 8 and the stator assembly 9 are arranged in the containing cavity in a predetermined order, and the motor main shaft is arranged on the hydraulic component 3 and the rotor assembly 8, which achieves the purpose of modularization and standardization, thereby realizing the technical effects of optimizing the structure and improving the product conversion flexibility, and further solving the technical problems of the existing boiler water circulation pump, such as unreasonable structure design, poor use effect, low product conversion flexibility and long delivery time.

[0059] Further, the pump housing assembly 1 comprises a boiler water inlet end arranged along the first direction, and a boiler water outlet end arranged on one side of the boiler water inlet end. It can be understood that the boiler water inlet and outlet effect can be ensured.

[0060] Further, the pump housing assembly 1 is further provided with a flow guide cover assembly 2. It can be understood that the vortex and turbulent flow of water flow can be effectively reduced, the pressure loss of fluid can be reduced, the efficiency of the pump can be improved, the impeller assembly can work under stable water flow conditions, and excessive vibration or flow instability can be avoided.

[0061] Further, the hydraulic component 3 comprises an impeller assembly arranged in the flow guide cover assembly 2 and located below the flow guide cover assembly 2, and the impeller assembly is connected to the top of the rotor assembly 8. It can be understood that the water flow direction is optimized by the cooperation of the impeller assembly and the flow guide cover assembly 2, the energy loss is reduced, the water flow through the impeller is more stable, and the working efficiency and performance of the pump are effectively improved.

[0062] Further, the top of the hot neck 5 is provided with an extension section 4, and the extension section 4 is connected to the impeller assembly and the motor main shaft respectively. It can be understood that the connection stability between the impeller and the motor main shaft is enhanced, and the transmission of water flow between the rotor and the impeller is more efficient, and the fluid dynamic performance of the whole pump system is improved.

[0063] Further, the motor shell 7 is provided with a pump end bearing chamber 6 near one side of the top, which is connected with the motor main shaft. It can be understood that the stability and precision of the motor main shaft are ensured, the bearing wear and vibration are reduced, the service life of the equipment is prolonged, and the long-term stable operation of the pump is ensured.

[0064] Further, the motor shell 7 is provided with a cover end bearing chamber 10 near one side of the bottom, which is connected with the bottom of the motor main shaft. It can be understood that additional support is provided to help stabilize the rotating motor main shaft, avoid mechanical wear caused by shaft offset, and ensure efficient operation and long-term stability of the pump.

[0065] Further, the bottom of the motor main shaft is also provided with a thrust disc 11. It can be understood that the axial pressure is effectively shared to prevent the main shaft from being excessively bent or damaged, thereby improving the service life of the pump and reducing maintenance costs.

[0066] As a preferred, the upper and lower ends of the thrust disc 11 are respectively provided with upper and lower thrust blocks. It can be understood that the thrust block can effectively reduce friction and reduce excessive wear, thereby improving the durability of the thrust disc 11 and the long-term reliability of the pump.

[0067] Further, one side of the motor shell 7 is also provided with a junction box assembly 13. It can be understood that the safety and stability of the motor power connection are ensured, and the electrical elements are protected to avoid electrical failure or short circuit.

[0068] Further, the flow guide cover assembly 2 is provided with an anti-fouling structure. It can be understood that external impurities or solid particles in water can effectively prevent the impurities from entering the pump interior, avoid damage or influence of these impurities on the hydraulic components 3, thereby ensuring the cleanliness of the pump interior and the smooth flow of the fluid, reducing wear or blockage caused by impurities, and improving the reliability and service life of the equipment.

[0069] Further, the anti-fouling structure comprises: a filter screen arranged in the flow guide cover assembly 2, the filter screen is provided with a sliding adjustment structure on both sides, the sliding adjustment structure comprises: a limiting block, a limiting groove is formed on the left side of the limiting block, a sliding outer frame is slidably connected inside the flow guide cover and located on the left side of the limiting block, a filter screen is fixedly connected in the sliding outer frame to enhance the filtering effect, a clamping block is fixedly connected to the right side of the sliding outer frame, the clamping block is inserted into the limiting groove, and a limiting hole is formed in the clamping block in the vertical direction.

[0070] Further, the motor adopts a variable frequency motor;

[0071] Further, it also includes but is not limited to: pump housing, wet stator variable frequency motor, heat exchanger and related accessories; wherein, in addition to the stator of the dehumidification stator variable frequency motor, other components maintain the original BCP design;

[0072] The stator assembly of the wet stator variable frequency motor is composed of a stator shell, silicon steel sheets, a silicon steel sheet pressing plate, a stator key, a winding cable, a lead wire, an open ring, and a retreat stopping device of the open ring. The silicon steel sheet pressing plate is installed in the stator shell and located on both sides of the silicon steel sheets. The silicon steel sheets are pressed into the stator shell by a press.

[0073] The stator key is used to fix the silicon steel sheets and the silicon steel sheet pressing plate to ensure that they cannot rotate in the stator shell.

[0074] The winding cable is manually wound into the pressed stator according to the electrical design. The lead wire serves as a conductive terminal of the stator, connects the conductor through cold pressing and tin soldering, and is covered with a heat-melting insulating material to play an insulating role. In addition, a set of VFD is added to achieve the purpose of variable frequency operation of the motor.

[0075] The utility model also has the following beneficial effects:

[0076] 1. Modular and standardized design is adopted to expand the range of standard parts, form a series of products through different winding specifications, winding methods, and different configurations of the fine neck section of the motor shell 7, ensure product quality, improve product quality, reduce repetitive labor, speed up design, facilitate the adoption and promotion of new technologies, facilitate the implementation of factory production, assembly, and construction mechanization, improve labor productivity, and improve economic efficiency.

[0077] 2. Compared with the prior art, the application changes the inherent BCP motor power frequency design and adopts a variable frequency design to expand the application range of the motor and reduce the wear of the motor and pump body parts caused by frequent start and stop of the original power frequency motor. The variable frequency starting current is smaller, reducing the impact on the power grid. The product is more flexible in application.

[0078] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments. Within the technical concept of the utility model, the technical solutions of the utility model can be variously equivalent, and these equivalent changes all belong to the protection scope of the utility model.

Claims

1. A boiler water circulating pump characterized by, The application relates to a pump assembly. The pump assembly comprises: a pump shell assembly; a hot neck arranged below the pump shell assembly along a first direction; a motor shell arranged below the hot neck along the first direction; a motor cover arranged below the motor shell along the first direction; a hydraulic component arranged in the pump shell assembly along the first direction; a rotor assembly connected with the bottom of the hydraulic component along the first direction and extending in the hot neck and the motor shell; and a stator assembly connected with the rotor assembly and arranged in the motor shell. The pump shell assembly, the hot neck, the motor shell and the motor cover form a concentric accommodating cavity along the first direction, the hydraulic component, the rotor assembly and the stator assembly are sequentially arranged in the accommodating cavity according to a preset sequence, and the hydraulic component and the rotor assembly are provided with a motor main shaft.

2. The boiler water circulating pump according to claim 1, characterized by The pump shell assembly comprises a boiler water inlet end arranged along the first direction, and a boiler water outlet end arranged on one side of the boiler water inlet end.

3. The boiler water circulating pump according to claim 1, characterized by The pump shell assembly is further provided with a flow guide cover assembly.

4. The boiler water circulating pump according to claim 3, characterized by The hydraulic component comprises an impeller assembly arranged in the flow guide cover assembly and below the flow guide cover assembly, and the impeller assembly is connected with the top of the rotor assembly.

5. The boiler water circulating pump according to claim 4, characterized in that, The top of the hot neck is provided with an extension section connected with the impeller assembly and the motor main shaft.

6. The boiler water circulating pump according to claim 1, characterized by The motor shell is provided with a pump end bearing chamber on one side close to the top, and the pump end bearing chamber is connected with the motor main shaft.

7. The boiler water circulating pump according to claim 1, characterized by The motor shell is provided with a cover end bearing chamber on one side close to the bottom, and the cover end bearing chamber is connected with the bottom of the motor main shaft.

8. The boiler water circulating pump according to claim 1, characterized by The bottom of the motor main shaft is further provided with a thrust disc.

9. The boiler water circulating pump according to claim 8, characterized in that, The upper and lower ends of the thrust disc are respectively provided with upper and lower thrust blocks.

10. The boiler water circulating pump according to claim 1, characterized in that, One side of the motor shell is further provided with a junction box assembly.

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