Multi-stage pump special for air energy

Abstract

The utility model discloses a special multistage pump for air energy, which comprises a pump body, a linkage frame is buckled on the rear side of the pump body, a motor assembly is inserted on the rear side of the linkage frame, a lining disc is arranged between the linkage frame and the pump body, and the lining disc and the pump body are buckled in a sealing state. The horizontal electric pump is compact in structure and small in occupied area, and the pump shaft is parallel to the ground due to the horizontal structure, so that the electric pump is small in occupied area and suitable for limited installation space. Operation is stable, noise is low, the advanced electromagnetic structure design is matched with a Z4-grade bearing, vibration and noise of the electric pump are reduced, and operation stability is improved; and 3, the efficiency is high, and the energy consumption is low: due to the design of the multi-stage impeller, the liquid is supercharged for multiple times in the pump body, the lift of the electric pump is improved, meanwhile, the energy loss is reduced, and the efficiency of the electric pump is improved. The inlet and the outlet of the pump body are located on the same side, installation and maintenance are convenient, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid power machinery, in particular to a special multi-stage pump for air energy. Background Art

[0002] The multi-stage pump is an important part of the heat pump system and is used to complete tasks such as water cycle immersion heating and cooling, and floor air conditioning circulation. With the wide application of air energy products, the demand for multi-stage pumps that can stably, efficiently, and energy-savingly transport liquids is increasing. Traditional multi-stage pumps have problems such as high noise, high energy consumption, short service life, and difficult maintenance during operation. Therefore, developing a special multi-stage pump for air energy to meet market demand has become an important research direction in this field. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a special multi-stage pump for air energy, which has a compact structure, stable operation, low noise, high efficiency, low energy consumption, and is easy to maintain.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A special multi-stage pump for air energy includes a pump body, a coupling frame is buckled at the rear side of the pump body, a motor assembly is inserted at the rear side of the coupling frame, a lining plate is arranged between the coupling frame and the pump body, the lining plate and the pump body are buckled to be in a sealed state, the rotating end of the motor assembly penetrates through the coupling frame and the lining plate, an impeller assembly is arranged between the lining plate and the pump body and on the rotating end of the motor assembly, a pump head end cover is buckled at the front side of the pump body, several screws are inserted at the front side of the pump body end cover, the screws penetrate through the pump body and the lining plate and are helically connected with the coupling frame, a water inlet is arranged at the front side of the pump body, the water inlet penetrates through the pump head end cover, and a water outlet is arranged at the top of the pump head.

[0005] Preferably, a drain port is arranged at the front side of the pump body and above the water inlet, a drain screw is inserted on the pump head end cover, and the drain screw penetrates through the pump head end cover and is helically connected with the drain port.

[0006] Preferably, the motor assembly includes a motor cylinder, which is arranged at the rear side of the linkage bracket. The motor cylinder is fastened to the linkage bracket. A rear end cover is inserted at the rear side of the motor cylinder, and a support foot is inserted at the bottom of the motor cylinder. The support foot is connected to the motor cylinder by screws. A stator is arranged inside the motor cylinder, and a rotor is rotatably installed inside the stator. A pump shaft is installed inside the rotor. The pump shaft sequentially penetrates through the linkage bracket and the lining disc and is connected to the impeller assembly. A nut is helically installed at the front end of the pump shaft to press the impeller assembly. Bearings are arranged between the pump shaft and both the linkage bracket and the rear end cover. A mechanical seal is arranged between the pump shaft and the lining disc and on the side close to the pump body. The mechanical seal is fitted with the lining disc.

[0007] Preferably, a fan is installed at the rear side of the rear end cover. The fan is connected to the pump shaft. A wind cover is arranged outside the fan. The wind cover is connected to the rear end cover. A corrugated spring is arranged between the bearing close to the rear side and the rear end cover. A water blocking ring is installed on the outer ring surface of the pump shaft and between the linkage bracket and the lining disc. O-rings are embedded between the motor cylinder and both the linkage bracket and the rear end cover. A retaining ring is arranged between the bearing close to the front side and the motor cylinder. A number of hexagon head bolts are inserted at the front side of the linkage bracket. The hexagon head bolts are helically connected to the rear end cover.

[0008] Preferably, a power supply box is fastened to the top of the motor cylinder. A capacitor clip is inserted into the power supply box and on the motor cylinder. The capacitor clip is connected to the motor cylinder by screws. A running capacitor is installed on the capacitor clip.

[0009] Preferably, a water inlet housing is embedded inside the pump body. An insert, a guide vane, an impeller body, a water outlet guide vane, and a final stage impeller are sequentially installed on the pump shaft between the water inlet housing and the lining disc. Advantages

[0010] The utility model provides a special multi-stage pump for air energy, which has the following advantages: 1. Compact structure and small floor area: Due to the horizontal structure, the pump shaft is parallel to the ground, making the electric pump have a small floor area and being suitable for limited installation space.

[0011] 2. Stable operation and low noise: The advanced electromagnetic structure design, combined with Z4-grade bearings, reduces the vibration and noise of the electric pump and improves the stability of operation.

[0012] 3. High efficiency and low energy consumption: The design of the multi-stage impeller enables the liquid to be pressurized multiple times inside the pump body, increasing the head of the electric pump. At the same time, energy loss is reduced, improving the efficiency of the electric pump.

[0013] 4. Easy to maintain: The inlet and outlet of the pump body are on the same side, which is convenient for installation and maintenance, reducing the maintenance cost. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of the present utility model.

[0015] Figure 2 It is a front view structural schematic diagram of the present utility model.

[0016] Figure 3 It is a rear view structural schematic diagram of the present utility model.

[0017] Figure 4 It is a sectional structural schematic diagram of the present utility model.

[0018] Figure 5 It is an exploded structural schematic diagram of the present utility model.

[0019] Figure 6 It is a structural schematic diagram of the impeller body of the present utility model.

[0020] In the figure: 1, screw; 2, drain screw; 3, pump head end cover; 4, pump body; 5, nut; 6, inlet housing; 7, insert; 8, guide vane; 9, impeller body; 10, outlet guide vane; 11, final stage impeller; 12, mechanical seal; 13, lining plate; 14, water blocking ring; 15, connecting frame; 16, O-ring; 17, pump shaft; 18, bearing; 19, rotor; 20, hexagon head bolt; 21, stator; 22, power supply box; 23, support leg; 24, motor cylinder; 25, running capacitor; 26, rear end cover; 27, fan; 28, wind cover; 29, capacitor clip; 30, wave spring; 31, retaining ring. Detailed Implementation Manner

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0022] Those skilled in the art connect all the electrical components in this case to their adapted power supplies through wires and should select a suitable controller according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0023] Please refer to Figure 1-6, the present utility model provides a technical solution: a special multi-stage pump for air energy, including a pump body 4, a coupling frame 15 is buckled at the rear side of the pump body 4, a motor assembly is inserted at the rear side of the coupling frame 15, a lining plate 13 is provided between the coupling frame 15 and the pump body 4, the lining plate 13 is buckled with the pump body 4 to form a sealed state, the rotating end of the motor assembly penetrates through the coupling frame 15 and the lining plate 13, an impeller assembly is provided between the lining plate 13 and the pump body 4 and on the rotating end of the motor assembly, a pump head end cover 3 is buckled at the front side of the pump body 4, several screws 1 are inserted at the front side of the end cover of the pump body 4, the screws 1 penetrate through the pump body 4 and the lining plate 13 and are spirally connected with the coupling frame 15, a water inlet is opened at the front side of the pump body 4, the water inlet penetrates through the pump head end cover 3, and a water outlet is opened at the top of the pump head.

[0024] Embodiment 1: A drain port is opened at the front side of the pump body 4 and above the water inlet, a drain screw 2 is inserted on the pump head end cover 3, and the drain screw 2 penetrates through the pump head end cover 3 and is spirally connected with the drain port;

[0025] Specifically, as Figure 1-5 shown, the pump body 4 of the special multi-stage pump for air energy is of a horizontal structure, the pump shaft 17 is parallel to the ground, the impeller body 9 is axially distributed along the pump shaft 17, the insert 7 is integrally injection-molded with the impeller, an O-ring 16 is provided between the pump body 4 and the water inlet housing 6, and is connected and fixed with the guide vane 8 through a hexagon nut 5 and a spring washer. The motor includes a motor cylinder 24, a rear end cover 26 detachably connected to the rear end of the motor cylinder 24, a rotor 19 rotatably connected to the rear end cover 26, and a stator 21 disposed around the rotor 19 and fixedly connected to the motor cylinder 24.

[0026] As Figure 6 shown, the blades of the special multi-stage pump for air energy are spirally distributed. When the motor drives the pump shaft 17 to rotate, the blades of the impeller drive the liquid to rotate and generate a centrifugal force, causing the liquid to be thrown out in the radial direction to form a high-speed liquid flow. The setting of the multi-stage impeller enables the liquid to be pressurized multiple times in the pump body 4, thereby increasing the head of the electric pump.

[0027] In practical applications, the number of stages of the impeller body 9 and the shape of the blades can be adjusted according to specific requirements to optimize the performance of the electric pump.

[0028] Embodiment 2: The motor assembly includes a motor cylinder 24, which is arranged at the rear side of the coupling frame 15. The motor cylinder 24 is fastened to the coupling frame 15. A rear end cover 26 is inserted at the rear side of the motor cylinder 24, and a support leg 23 is inserted at the bottom of the motor cylinder 24. The support leg 23 is connected to the motor cylinder 24 by screws. A stator 21 is arranged inside the motor cylinder 24, and a rotor 19 is rotatably installed inside the stator 21. A pump shaft 17 is installed inside the rotor 19. The pump shaft 17 sequentially passes through the coupling frame 15 and the lining disc 13 and is connected to the impeller assembly. A nut 5 is spirally installed at the front end of the pump shaft 17 to press the impeller assembly. Bearings 18 are arranged between the pump shaft 17 and the coupling frame 15 and the rear end cover 26 respectively. A mechanical seal 12 is arranged between the pump shaft 17 and the lining disc 13 and on the side close to the pump body 4. The mechanical seal 12 is fitted with the lining disc 13.

[0029] A fan 27 is installed at the rear side of the rear end cover 26. The fan 27 is connected to the pump shaft 17. A wind shield 28 is arranged outside the fan 27. The wind shield 28 is connected to the rear end cover 26. A corrugated spring 30 is arranged between the bearing 18 close to the rear side and the rear end cover 26. A water blocking ring 14 is installed on the outer ring surface of the pump shaft 17 between the coupling frame 15 and the lining disc 13. O-rings are embedded between the motor cylinder 24 and the coupling frame 15 and the rear end cover 26 respectively. A retaining ring 31 is arranged between the bearing 18 close to the front side and the motor cylinder 24. A plurality of hexagon head bolts 20 are inserted at the front side of the coupling frame 15. The hexagon head bolts 20 are spirally connected to the rear end cover 26.

[0030] A power supply box 22 is fastened to the top of the motor cylinder 24. A capacitor clip 29 is inserted into the power supply box 22 and on the motor cylinder 24. The capacitor clip 29 is connected to the motor cylinder 24 by screws. A running capacitor 25 is installed on the capacitor clip 29;

[0031] Specifically, the air energy special multi-stage pump includes components such as a pump body 4, a pump shaft 17, an impeller, an insert 7, a guide vane 8, and a motor. The pump body 4 is of a horizontal structure. The pump shaft 17 is parallel to the ground. The impellers of the injection molded inserts 7 are distributed axially along the pump shaft 17. The motor includes a motor cylinder 24, a rear end cover 26 detachably connected to the rear end of the motor cylinder 24, a rotor 19 rotatably connected to the rear end cover 26, and a stator 21 arranged around the rotor 19 and fixedly connected to the motor cylinder 24.

[0032] 1. Pump body 4: It is made of high-strength and corrosion-resistant materials. An O-ring 16 is arranged between the pump body 4 and the water inlet shell 6, and it is connected and fixed to the guide vane 8 through a hexagon nut 5 and a spring washer. The inlet and outlet of the pump body 4 are on the same side, which is convenient for installation and maintenance.

[0033] 2. Impeller: The blades are distributed in a spiral shape. When the pump shaft 17 rotates, the blades drive the liquid to rotate and generate centrifugal force, causing the liquid to be thrown out in the radial direction, forming a high-speed liquid flow. The setting of multiple-stage impellers enables the liquid to be pressurized multiple times within the pump body 4, thereby increasing the lift of the pump.

[0034] 3. Insert 7: Each stage of the impeller includes a connecting insert 7 that transmits the torque of the transmission rotor 19 to the middle of the impeller. The external dimensions of this insert 7 are designed according to the load-bearing capacity of the position of the impeller pump shaft 17, and it can safely transmit the torque of the pump shaft 17 to the impeller, ensuring the stable operation of the electric pump. The insert 7 and the impeller are integrally formed by an advanced injection molding technology. While meeting the strength requirements, it can ensure high form and position requirements, thereby reducing the vibration generated during the operation of the electric pump. The material of the insert 7 is high-strength copper alloy, and the impeller is made of high-strength engineering plastic. Both have excellent corrosion resistance and heat resistance, so that the impeller structure of the electric pump will not loosen or disassemble when transporting high-temperature liquids.

[0035] 4. Motor: Conventional motors first machine the motor cylinder 24 and the rear end cover 26 that is detachably connected to the rear end of the motor cylinder 24, and then assemble them with the stator 21 that is arranged around the rotor 19 and fixedly connected to the motor cylinder 24. In this way, during the press-fitting process, there will be a form and position difference between the inner diameter of the stator 21 and the inner diameter of the motor cylinder 24, affecting the stability of the final operation. The motor designed in the present invention first fixes the stator 21 and the motor cylinder 24, and then locates and machines the mating surfaces of the motor cylinder 24 with the connecting frame 15 and the motor cylinder 24 with the rear end cover 26 according to the inner hole of the stator 21. During operation, it can ensure the low vibration and low noise requirements of the air energy special multi-stage pump, thereby enhancing the user experience. At the same time, a wide voltage design is adopted to adapt to the requirements of different voltage environments.

[0036] 5. Rear end cover 26: Since the use environment of the air energy special multi-stage pump is not fixed and the rain protection requirement for the electric pump is relatively high, the present invention designs a rain protection boss in the direction of the rear end cover 26 close to the power supply box 22, which can divert the rainwater falling above the electric pump to both ends of the electric pump, preventing the rainwater from entering the motor through the shaft hole of the rear end cover 26 and ensuring the safe operation of the motor.

[0037] Embodiment Three: An inlet housing 6 is embedded inside the pump body 4. An insert 7, a guide vane 8, an impeller body 9, an outlet guide vane 108, and a final-stage impeller 11 are sequentially installed between the inlet housing 6 and the lining plate 13 and on the pump shaft 17.

[0038] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage pump dedicated to air energy, characterized in that, It includes a pump body (4), a coupling frame (15) is fastened to the rear side of the pump body (4), a motor assembly is inserted into the rear side of the coupling frame (15), a lining disc (13) is provided between the coupling frame (15) and the pump body (4), the lining disc (13) and the pump body (4) are fastened together to be in a sealed state, the rotating end of the motor assembly penetrates through the coupling frame (15) and the lining disc (13), and an impeller assembly is provided between the lining disc (13) and the pump body (4) and on the rotating end of the motor assembly. A pump head end cover (3) is fastened to the front side of the pump body (4), several screws (1) are inserted into the front side of the end cover of the pump body (4), the screws (1) penetrate through the pump body (4) and the lining disc (13) and are helically connected to the coupling frame (15). An inlet is provided on the front side of the pump body (4), the inlet penetrates through the pump head end cover (3), and an outlet is provided on the top of the pump head.

2. The multi-stage pump dedicated to air energy according to claim 1, characterized in that , a drain port is provided on the front side of the pump body (4) and above the inlet, a drain screw (2) is inserted into the pump head end cover (3), and the drain screw (2) penetrates through the pump head end cover (3) and is helically connected to the drain port.

3. The multi-stage pump dedicated to air energy according to claim 1, characterized in that , the motor assembly includes a motor cylinder (24), the motor cylinder (24) is placed on the rear side of the coupling frame (15), the motor cylinder (24) is fastened to the coupling frame (15), a rear end cover (26) is inserted into the rear side of the motor cylinder (24), a support foot (23) is inserted into the bottom of the motor cylinder (24), the support foot (23) is connected to the motor cylinder (24) by screws. A stator (21) is provided inside the motor cylinder (24), a rotor (19) is rotatably installed inside the stator (21), a pump shaft (17) is installed inside the rotor (19), the pump shaft (17) sequentially penetrates through the coupling frame (15) and the lining disc (13) and is connected to the impeller assembly. A nut (5) is helically installed at the front end of the pump shaft (17) for pressing the impeller assembly. Bearings (18) are provided between the pump shaft (17) and the coupling frame (15) and between the pump shaft (17) and the rear end cover (26). A mechanical seal (12) is provided between the pump shaft (17) and the lining disc (13) and on the side close to the pump body (4), and the mechanical seal (12) is fitted into the lining disc (13).

4. The multistage pump dedicated to air energy according to claim 3, characterized in that , A fan (27) is installed at the rear side of the rear end cover (26). The fan (27) is connected to the pump shaft (17). A wind hood (28) is provided outside the fan (27), and the wind hood (28) is connected to the rear end cover (26). A corrugated spring (30) is provided between the bearing (18) close to the rear side and the rear end cover (26). A water blocking ring (14) is installed on the outer ring surface of the pump shaft (17) between the coupling frame (15) and the lining disc (13). O-rings are embedded between the motor cylinder (24) and the coupling frame (15) and the rear end cover (26). A retaining ring (31) is provided between the bearing (18) close to the front side and the motor cylinder (24). A number of hexagon head bolts (20) are inserted into the front side of the coupling frame (15), and the hexagon head bolts (20) are screwed to the rear end cover (26).

5. The multi-stage pump dedicated to air energy according to claim 3, characterized in that , A power supply box (22) is buckled on the top of the motor cylinder (24). A capacitor clip (29) is inserted on the motor cylinder (24) inside the power supply box (22). The capacitor clip (29) is connected to the motor cylinder (24) by screws, and a running capacitor (25) is installed on the capacitor clip (29).

6. The multi-stage pump dedicated to air energy according to claim 3, characterized in that , An inlet housing (6) is embedded inside the pump body (4). An insert (7), a guide vane (8), an impeller body (9), an outlet guide vane (10), and a final stage impeller (11) are sequentially installed on the pump shaft (17) between the inlet housing (6) and the lining disc (13).

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