CN111608925A - Submersible electric pump with combined impeller - Google Patents

Submersible electric pump with combined impeller Download PDF

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Publication number
CN111608925A
CN111608925A CN202010617081.5A CN202010617081A CN111608925A CN 111608925 A CN111608925 A CN 111608925A CN 202010617081 A CN202010617081 A CN 202010617081A CN 111608925 A CN111608925 A CN 111608925A
Authority
CN
China
Prior art keywords
impeller
shaft
pump
water inlet
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010617081.5A
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Chinese (zh)
Inventor
王传沛
王家志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Dongjia Irrigation And Drainage Machinery Co ltd
Original Assignee
Jiangsu Dongjia Irrigation And Drainage Machinery Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Dongjia Irrigation And Drainage Machinery Co ltd filed Critical Jiangsu Dongjia Irrigation And Drainage Machinery Co ltd
Priority to CN202010617081.5A priority Critical patent/CN111608925A/en
Publication of CN111608925A publication Critical patent/CN111608925A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/185Rotors consisting of a plurality of wheels

Abstract

The utility model provides a submerged motor pump with combination formula impeller, belongs to water pump technical field. A water pump and a submersible motor; the water pump and the submersible motor are connected into a whole; the shaft of the water pump penetrates through the water pump, the shaft of the submersible motor penetrates through the submersible motor, and the shaft of the water pump is connected with the shaft of the submersible motor through a coupler; the water inlet joint of the water pump is connected with the pump body and fixed into a whole through a fastening bolt, and the lower half part of the pump body is a front joint; the shaft penetrates through the water inlet joint and the pump body; the water inlet joint is wrapped with a water inlet filter screen, a shaft in the water inlet joint is connected to the bearing seat through a bearing, and the upper end of the bearing is connected with a framework seal; the shaft is sequentially positioned and connected with a front impeller and an impeller through keys, and the front impeller is positioned in a front section of the pump body; a positioning sleeve is sleeved on the shaft at the joint of the water inlet joint and the pump body. The advantages are that: the impact loss of water flow is reduced, and the efficiency of the water pump is improved while the flow and the lift of the water pump are increased; the method is simple and convenient, and the application range of the water pump is expanded.

Description

Submersible electric pump with combined impeller
Technical Field
The invention relates to the technical field of water pumps, in particular to a submersible electric pump with a combined impeller.
Background
The existing submersible electric pump is composed of two main parts, namely an impeller and a flow guide body, the pump is generally formed by combining two stages or multi-stage impellers for improving the lift of the submersible electric pump, each stage of impeller must be configured with the corresponding flow guide body, each stage of impeller must be matched simultaneously, the lift of the pump must be increased in multiple times when the pump is in use, the pump is not necessary to be increased in multiple times due to the need of the lift of the submersible electric pump, and the axial height of the pump is increased if the pump adopting the multi-stage impeller must be configured with the corresponding flow guide bodies, and certain difficulty is brought to the overall design of the water feed pump.
Disclosure of Invention
The invention aims to provide a submersible electric pump with a combined impeller, and solves the problems that the axial height of the pump is required to be increased when the lift of the submersible electric pump is increased, and the overall design of a water pump is difficult.
The purpose of the invention is realized as follows: a water pump and a submersible motor; the water pump and the submersible motor are connected into a whole; the shaft of the water pump penetrates through the water pump, the shaft of the submersible motor penetrates through the submersible motor, and the shaft of the water pump is connected with the shaft of the submersible motor through a coupler;
the water pump includes: the water inlet joint, the preposed impeller, the pump body, the shaft, the key, the positioning sleeve, the fastening bolt and the water inlet filter screen; the water inlet joint is connected with the pump body and fixed into a whole through a fastening bolt, and the lower half part of the pump body is a front joint; the shaft penetrates through the water inlet joint and the pump body; the water inlet joint is wrapped with a water inlet filter screen, a shaft in the water inlet joint is connected to the bearing seat through a bearing, and the upper end of the bearing is connected with a framework seal; the shaft is sequentially positioned and connected with a front impeller and an impeller through keys, and the front impeller is positioned in a front section of the pump body; a positioning sleeve is sleeved on the shaft at the joint of the water inlet joint and the pump body.
The impeller is provided with an impeller shaft, a shaft hole is arranged in the center of the impeller shaft, impeller blades are arranged on the outer wall of the impeller shaft, the impeller blades are of a spiral type lifting force structure, and smooth transition is formed between the connecting surfaces of the impeller blades and the impeller shaft.
The fore-joint comprises: a front impeller water inlet and a front impeller chamber; the water inlet of the front impeller is positioned at one end connected with the water inlet joint, the front half part of the pump body at one end of the water inlet of the front impeller is a front impeller chamber, and the front impeller is positioned in the front impeller chamber; the front impeller chamber is a frustum-shaped cavity and is matched with the frustum shape of the front impeller.
The front impeller comprises: a keyway, a leading blade and a hub; the center of the hub is provided with a through hole, and the inner wall of the through hole is provided with a key groove; the outer wall of the hub is uniformly provided with front blades, and a front impeller formed by the front blades is in a frustum shape.
The number of the front blades is 3 to 5; the inner side of the front blade extends upwards along the hub of the front impeller, the placing angle of the front blade is gradually increased and is in a semi-open type, and a gap is reserved between the outer edge and the inner wall of the water inlet section; the front blade is of a spiral lifting structure, the inlet angle alpha 1 is 20-35 degrees, the mounting angle at the outlet is 90 degrees, and the inlet angle and the mounting angle are in spiral transition.
The water pump has the beneficial effects that by adopting the scheme, the front impeller is assembled at the front end of the inlet of the water pump impeller, 3-5 blades are uniformly distributed on the front blade along the hub of the front impeller, the blade is designed into a semi-open type, a certain gap is reserved between the outer edge of the blade and the inner wall of the water inlet section, the gap is determined according to the working characteristics of the water pump, and the gap can be reduced when the lift is increased and the flow is large. Conversely, the amount of clearance may be increased.
The blades distributed on the hub of the front impeller are drawn by stamping and die pressing to ensure that the shapes of all the blades are unchanged, the blades are fixed with the hub by welding, the blades adopt a spiral lifting force structure, the inlet angle alpha 1 of each blade is generally 20-35 degrees, the inner side of each blade extends upwards along the hub of the front impeller, the placing angles of the blades are gradually increased, and when the placing angles of the blades at the outlet reach 90 degrees; when the front impeller rotates along with the pump shaft, water flow in front of a water inlet section of the water pump flows into the blades of the front impeller, so that the water flow enters the blades, a certain amount of lift force and centrifugal force can be generated when the blades rotate, the flow entering the front impeller is driven to increase water flow energy, and meanwhile, the flowing direction of the water flow is gradually changed, so that the water flow enters an inlet of the water pump impeller by 90 degrees, and the water inlet condition of the water pump impeller is improved.
The angle of the outlet of the front vane is 90 degrees, so that the flow velocity direction of water flow passing through the front impeller is consistent with the inlet direction of the water pump impeller, and a flow guide body at the outlet of the front vane is not designed, so that the structure of the product is simpler.
In the design of the combined impeller, the front impeller can be adopted or omitted according to actual requirements, so that the combined impeller is simple and convenient, and the application range of the water pump is expanded.
When the submersible electric pump works, the pump shaft rotates to drive the water pump impeller to rotate and simultaneously drive the front impeller to rotate, water flow at the inlet section flows into the inlet of the water pump impeller gradually along the change trend of the blades of the front impeller, and when the water flow passes through the blades of the front impeller, the water flow generates certain lift force and centrifugal force under the action of the blades, so that the water flow energy flowing through the blades can be continuously increased, thereby improving the inlet pressure in front of the water pump impeller, the water flow reaches certain pressure when passing through the water pump impeller, and the lift of the water pump is improved. The efficiency of the water pump is also improved.
The problem that the axial height of the water pump needs to be increased when the lift of the submersible electric pump is increased and the overall design of the water pump is difficult is solved, and the purpose of the invention is achieved.
The advantages are that: the impact loss of water flow is reduced, and the efficiency of the water pump is improved while the flow and the lift of the water pump are increased; the method is simple and convenient, and the application range of the water pump is expanded.
Drawings
Fig. 1 is a schematic structural view of a combined impeller of the submersible electric pump of the present invention.
Fig. 2 is a schematic perspective structural view of the impeller of the present invention.
Fig. 3 is a schematic sectional structure view of the front impeller of the present invention.
Fig. 4 is a schematic perspective view of the front impeller of the present invention.
Fig. 5 is a schematic view of the front impeller blade deployment of the present invention.
In the figure, 1, a water inlet joint; 2. a front section; 2-1, a water inlet of a front impeller; 2-2, a front impeller chamber; 3. a front impeller; 3-1, a key groove; 3-2, blades; 3-3, a hub; 4. an impeller; 5. a pump body; 6. a shaft; 7. a key; 8. a positioning sleeve; 9. fastening a bolt; 10. a water inlet filter screen; 11. a submersible motor.
Detailed Description
Example 1: the submersible electric pump comprises: a water pump and submersible motor 11; the water pump and the submersible motor 11 are connected into a whole; the shaft of the water pump penetrates through the water pump, the shaft of the submersible motor 11 penetrates through the submersible motor, and the shaft of the water pump is connected with the shaft of the submersible motor 11 through a coupler;
the water pump includes: the water inlet joint comprises a water inlet joint 1, a front joint 2, a front impeller 3, an impeller 4, a pump body 5, a shaft 6, a key 7, a positioning sleeve 8, a fastening bolt 9 and a water inlet filter screen 10;
the water inlet joint 1 is connected with the pump body and fixed into a whole through a fastening bolt 9, and the lower half part of the pump body 5 is a front joint 2; the shaft 6 penetrates through the water inlet joint 1 and the pump body 5; the water inlet joint 1 is wrapped with a water inlet filter screen 10, a shaft in the water inlet joint 1 is connected to a bearing seat through a bearing, and the upper end of the bearing is connected with a skeleton seal; the shaft 6 is sequentially positioned and connected with a front impeller 3 and an impeller 4 through a key 7, and the front impeller 3 is positioned in a front section 2 of a pump body 5; a positioning sleeve 8 is sleeved on the shaft 6 at the joint of the water inlet joint 1 and the pump body 5.
The impeller 4 is provided with an impeller shaft, a shaft hole is arranged in the center of the impeller shaft, impeller blades are arranged on the outer wall of the impeller shaft, the impeller blades are of a spiral type lifting force structure, and smooth transition is formed between the connecting surfaces of the impeller blades and the impeller shaft.
The front-end section 2 comprises: a front impeller water inlet 2-1 and a front impeller chamber 2-2; the water inlet 2-1 of the front impeller is positioned at one end connected with the water inlet joint 1, the front half part of the pump body 5 at one end of the water inlet 2-1 of the front impeller is a front impeller chamber 2-2, and the front impeller 3 is positioned in the front impeller chamber 2-2; the front impeller chamber 2-2 is a frustum-shaped cavity matched with the frustum shape of the front impeller 3.
The front impeller 3 comprises: a key groove 3-1, a front blade 3-2 and a hub 3-3; a through hole is formed in the center of the hub 3-3, and a key groove 3-1 is formed in the inner wall of the through hole; the outer wall of the hub 3-3 is uniformly distributed with front blades 3-2, and a front impeller 3 formed by the front blades 3-2 is in a frustum shape.
The number of the front blades is 3 to 5; the inner side of the front blade extends upwards along the hub of the front impeller 3, the placing angle of the front blade is gradually increased and is in a semi-open type, and a gap is reserved between the outer edge and the inner wall of the water inlet section; the front blade is of a spiral lifting structure, the inlet angle alpha 1 is 20-35 degrees, the mounting angle at the outlet is 90 degrees, and the inlet angle and the mounting angle are in spiral transition.

Claims (5)

1. A submersible electric pump with a combined impeller, the submersible electric pump comprising: a water pump and a submersible motor; the water pump and the submersible motor are connected into a whole; the shaft of the water pump penetrates through the water pump, the shaft of the submersible motor penetrates through the submersible motor, and the shaft of the water pump is connected with the shaft of the submersible motor through a coupler; the method is characterized in that:
the water pump includes: the water inlet joint, the preposed impeller, the pump body, the shaft, the key, the positioning sleeve, the fastening bolt and the water inlet filter screen; the water inlet joint is connected with the pump body and fixed into a whole through a fastening bolt, and the lower half part of the pump body is a front joint; the shaft penetrates through the water inlet joint and the pump body; the water inlet joint is wrapped with a water inlet filter screen, a shaft in the water inlet joint is connected to the bearing seat through a bearing, and the upper end of the bearing is connected with a framework seal; the shaft is sequentially positioned and connected with a front impeller and an impeller through keys, and the front impeller is positioned in a front section of the pump body; a positioning sleeve is sleeved on the shaft at the joint of the water inlet joint and the pump body.
2. The submersible electric pump with a combined impeller according to claim 1, characterized in that: the impeller is provided with an impeller shaft, a shaft hole is arranged in the center of the impeller shaft, impeller blades are arranged on the outer wall of the impeller shaft, the impeller blades are of a spiral type lifting force structure, and smooth transition is formed between the connecting surfaces of the impeller blades and the impeller shaft.
3. The submersible electric pump with a combined impeller according to claim 1, characterized in that: the fore-joint comprises: a front impeller water inlet and a front impeller chamber; the water inlet of the front impeller is positioned at one end connected with the water inlet joint, the front half part of the pump body at one end of the water inlet of the front impeller is a front impeller chamber, and the front impeller is positioned in the front impeller chamber; the front impeller chamber is a frustum-shaped cavity and is matched with the frustum shape of the front impeller.
4. A submersible electric pump with a combined impeller according to claim 1 or 3, characterized in that: the front impeller comprises: a keyway, a leading blade and a hub; the center of the hub is provided with a through hole, and the inner wall of the through hole is provided with a key groove; the outer wall of the hub is uniformly provided with front blades, and a front impeller formed by the front blades is in a frustum shape.
5. The submersible electric pump with a combined impeller according to claim 4, characterized in that: the number of the front blades is 3 to 5; the inner side of the front blade extends upwards along the hub of the front impeller, the placing angle of the front blade is gradually increased and is in a semi-open type, and a gap is reserved between the outer edge and the inner wall of the water inlet section; the front blade is of a spiral lifting structure, the inlet angle alpha 1 is 20-35 degrees, the mounting angle at the outlet is 90 degrees, and the inlet angle and the mounting angle are in spiral transition.
CN202010617081.5A 2020-07-01 2020-07-01 Submersible electric pump with combined impeller Pending CN111608925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010617081.5A CN111608925A (en) 2020-07-01 2020-07-01 Submersible electric pump with combined impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010617081.5A CN111608925A (en) 2020-07-01 2020-07-01 Submersible electric pump with combined impeller

Publications (1)

Publication Number Publication Date
CN111608925A true CN111608925A (en) 2020-09-01

Family

ID=72197215

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010617081.5A Pending CN111608925A (en) 2020-07-01 2020-07-01 Submersible electric pump with combined impeller

Country Status (1)

Country Link
CN (1) CN111608925A (en)

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