Impeller rotor smooth start type centrifugal water pump

Abstract

The present invention discloses a centrifugal water pump with smooth impeller rotor start, comprising a water pump body, the water pump body comprising a base, a water pump housing, a pump cover, an impeller, a transmission shaft and a drive motor, the water pump housing and the drive motor are both fixedly mounted on both sides of the upper end surface of the base, a volute-type water diversion chamber is provided inside the water pump housing, a water inlet is provided on the side end surface of the water pump housing, a water outlet is provided on the top end surface of the water pump housing, the water inlet and the water outlet are both connected to the pump cover, the impeller is provided inside the volute-type water diversion chamber, the impeller is set up in a vertical direction, the center of the impeller is facing the water inlet, the rear end of the impeller is connected to the transmission shaft, and the transmission shaft is led out from the rear side of the water pump housing. In the above manner, the present invention can reduce the torque load on the drive motor during the rotor rotation start stage of the centrifugal pump, so that the rotation start process is smoother.

Description

Technical Field

[0001] The invention relates to the field of water pumps, in particular to an impeller rotor smooth start type centrifugal water pump. Background Art

[0002] A water pump is the most common industrial equipment in the field of conveying liquids, which is used to pressurize and output liquids. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to convey liquids including water, oil, acid and alkali liquids, emulsions, suspensions and liquid metals, etc. It can also convey liquids, gas mixtures and liquids containing suspended solids. The technical parameters of water pump performance include flow rate, suction head, head, shaft power, water power, efficiency, etc. According to different working principles, it can be divided into positive displacement water pumps, vane pumps and other types. Positive displacement pumps use the change of the volume of their studio to transfer energy, and vane pumps use the interaction between the rotating blades and water to transfer energy. There are centrifugal pumps, axial flow pumps and mixed flow pumps. Centrifugal pumps are the most common type of equipment in booster water pumps. They use motors to drive the impeller to rotate and pressurize the liquid through strong centrifugal force. Generally, most water pumps use the direct connection between the motor and the impeller rotor, which leads to excessive starting voltage and current due to excessive starting load torque at the initial time of water pump startup, which can easily cause damage to the motor. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a centrifugal water pump with smooth impeller rotor start-up, which can reduce the torque load on the driving motor of the centrifugal pump during the rotor rotation start-up stage, making the rotation start-up process smoother.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an impeller rotor smooth start type centrifugal water pump, including a water pump body, the water pump body including a base, a water pump housing, a pump cover, an impeller, a transmission shaft and a drive motor, the water pump housing and the drive motor are fixedly mounted on both sides of the upper end surface of the base, a volute type water diversion chamber is arranged inside the water pump housing, a water inlet is arranged on the side end surface of the water pump housing, a water outlet is arranged on the top end surface of the water pump housing, the water inlet and the water outlet are both connected to the pump cover, the impeller is arranged inside the volute type water diversion chamber, and the impeller is arranged along the vertical direction The center of the impeller faces the water inlet, the rear end of the impeller is connected to the transmission shaft, and the transmission shaft is derived from the rear side of the water pump housing. A continuously variable transmission is provided at the center of the upper end surface of the base, and the continuously variable transmission is located between the water pump housing and the driving motor. A pair of parallel conical wheels are respectively provided between the upper and lower ends of the continuously variable transmission, and a transmission steel belt is connected between the conical wheels. The two ends of the conical wheels respectively lead out a power output shaft and a power input shaft to the outside, the output shaft of the driving motor is connected to the power input shaft through a coupling, and the power output shaft is connected to the transmission shaft through a coupling.

[0005] In a preferred embodiment of the present invention, a water suction hose is connected to the outside of the water inlet, and the end of the water suction hose is covered with a layer of sand and gravel filter.

[0006] In a preferred embodiment of the present invention, a sealing stuffing box is provided at the connection between the transmission shaft and the water pump housing.

[0007] In a preferred embodiment of the present invention, the outer side surface of the driving motor is covered and connected with a plurality of heat dissipation plates.

[0008] The beneficial effects of the present invention are as follows: the present invention designs a centrifugal water pump with a built-in continuously variable transmission, the main components of the water pump are a pump body structure and a drive structure, the pump body structure is a chamber containing water that guides water flow in and out, and is built with an impeller for centrifugal supercharging, and the impeller is coaxially rotated and driven by the motor of the drive structure. Generally, most water pumps use a direct connection between the motor and the impeller rotor, which results in excessive starting voltage and current due to excessive starting load torque at the initial time of starting the water pump, which can easily cause damage to the motor, while the water pump under this design designs a continuously variable transmission transmission mode between the motor and the transmission structure of the pump body, so that the transmission mode between the motor and the rotor has flexible and changeable adjustability, thereby improving the overall performance of the rotating drive structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0010] Figure 1 It is a structural schematic diagram of a preferred embodiment of the impeller rotor smooth start type centrifugal water pump of the present invention;

[0011] The markings of the components in the accompanying drawings are as follows: 1. Water pump body; 2. Base; 3. Water pump casing; 4. Pump cover; 5. Impeller; 6. Transmission shaft; 7. Drive motor; 8. Volute-type water diversion chamber; 9. Water inlet; 10. Water outlet; 11. Continuously variable transmission; 12. Conical wheel; 13. Transmission steel belt; 14. Power output shaft; 15. Power input shaft. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only 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.

[0013] See also Figure 1 , the embodiment of the present invention includes:

[0014] A centrifugal water pump with an impeller rotor that starts smoothly, comprising a water pump body 1, the water pump body 1 comprising a base 2, a water pump housing 3, a pump cover 4, an impeller 5, a transmission shaft 6 and a drive motor 7, the water pump housing 3 and the drive motor 7 are both fixedly mounted on both sides of the upper end surface of the base 2, a volute-type water diversion chamber 8 is provided inside the water pump housing 3, a water inlet 9 is provided on the side end surface of the water pump housing 3, a water outlet 10 is provided on the top end surface of the water pump housing 3, the water inlet 9 and the water outlet 10 are both connected to the pump cover 4, the impeller 5 is provided inside the volute-type water diversion chamber 8, the impeller 5 is set up in a vertical direction, and the center of the impeller 5 is directly opposite to the water inlet 9 The rear end of the impeller 5 is connected to the transmission shaft 6, and the transmission shaft 6 is derived from the rear side of the water pump housing 3. A continuously variable transmission 11 is provided at the center of the upper end surface of the base 2, and the continuously variable transmission 11 is located between the water pump housing 3 and the drive motor 7. A pair of parallel conical wheels 12 are respectively provided between the upper and lower ends of the continuously variable transmission 11, and a transmission steel belt 13 is connected between the conical wheels 12. The two ends of the conical wheels 12 respectively lead out a power output shaft 14 and a power input shaft 15 to the outside, and the output shaft of the drive motor 7 is connected to the power input shaft 15 through a coupling, and the power output shaft 14 is connected to the transmission shaft 6 through a coupling.

[0015] In addition, the outer side of the water inlet 9 is connected to a water suction hose, and the end of the water suction hose is covered with a layer of sand and gravel filter screen.

[0016] In addition, a sealing stuffing box is provided at the connection between the transmission shaft 6 and the water pump housing 3 .

[0017] In addition, the outer side of the driving motor 7 is covered and connected with a plurality of heat dissipation plates.

[0018] The working principle of the present invention is that the water pump body 1 includes a base 2, a water pump casing 3, a pump cover 4, an impeller 5, a transmission shaft 6 and a driving motor 7. The water pump casing 3 and the driving motor 7 are fixedly installed on both sides of the upper end surface of the base 2. The outer side of the driving motor 7 is covered and connected with a plurality of heat dissipation plates. The interior of the water pump casing 3 is provided with a volute-type water diversion chamber 8. The side end surface of the water pump casing 3 is provided with a water inlet 9. The outer side of the water inlet 9 is connected to a water suction hose, and the end of the water suction hose is covered with a layer of sand and gravel filter.

[0019] A water outlet 10 is provided on the top surface of the water pump housing 3, and the water inlet 9 and the water outlet 10 are both connected to the pump cover 4. An impeller 5 is provided inside the volute-type water diversion chamber 8. The impeller 5 is set in a vertical direction, and the center of the impeller 5 is facing the water inlet 9. The rear end of the impeller 5 is connected to a transmission shaft 6, and the transmission shaft 6 is led out from the rear side of the water pump housing 3. A sealing stuffing box is provided at the connection between the transmission shaft 6 and the water pump housing 3.

[0020] A continuously variable transmission 11 is provided at the center of the upper end surface of the base 2. The continuously variable transmission 11 is located between the water pump housing 3 and the drive motor 7. A pair of parallel conical wheels 12 are provided between the upper and lower ends of the continuously variable transmission 11, and a transmission steel belt 13 is connected between the conical wheels 12. The continuously variable transmission eliminates the complex and bulky gear combination speed transmission, and only uses two sets of pulleys for speed transmission. The speed is changed by changing the contact radius of the drive belt between the driving wheel and the driven wheel. Since the CVT can achieve continuous change of the transmission ratio, the best match between the transmission system and the engine working condition is obtained, which improves the transmission efficiency generated by the drive motor. In particular, the use of a smaller transmission ratio in the motor startup stage can effectively reduce the load of the motor and avoid damage to the motor due to excessive current.

[0021] The two ends of the conical wheel 12 respectively extend the power output shaft 14 and the power input shaft 15 outward, the output shaft of the drive motor 7 is connected to the power input shaft 15 through a coupling, and the power output shaft 14 is connected to the transmission shaft 6 through a coupling, realizing the mechanical transmission structure from the motor to the rotor impeller.

[0022] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An impeller rotor smooth start type centrifugal water pump, comprising a water pump body, characterized in that: The water pump body comprises a base, a water pump casing, a pump cover, an impeller, a transmission shaft and a driving motor. The water pump casing and the driving motor are fixedly mounted on both sides of the upper end surface of the base. A volute-type water diversion chamber is arranged inside the water pump casing. A water inlet is arranged on the side end surface of the water pump casing. A water suction hose is connected to the outside of the water inlet. The end of the water suction hose is covered with a layer of sand and gravel filter. A water outlet is arranged on the top end surface of the water pump casing. The water inlet and the water outlet are both connected to the pump cover. The impeller is arranged inside the volute-type water diversion chamber. The impeller is set up in a vertical direction. The center of the impeller faces the water inlet. The rear end of the impeller is connected to the transmission shaft. The transmission shaft is led out from the rear side of the water pump housing, a sealing stuffing box is provided at the connection between the transmission shaft and the water pump housing, a continuously variable transmission is provided at the center of the upper end surface of the base, the continuously variable transmission is located between the water pump housing and the drive motor, a pair of parallel conical wheels are respectively provided between the upper and lower ends of the continuously variable transmission, a transmission steel belt is connected between the conical wheels, and the two ends of the conical wheels respectively lead out a power output shaft and a power input shaft to the outside, the output shaft of the drive motor is connected to the power input shaft through a coupling, the power output shaft is connected to the transmission shaft through a coupling, and the outer side surface of the drive motor is covered and connected with a plurality of heat dissipation plates.

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