CN209990691U - End suction type direct connection double-suction pump - Google Patents

Abstract

The utility model belongs to the technical field of fluid machinery, in particular to an end suction type direct connection double suction pump which can be used in the flow circulation and secondary water supply occasions, the end suction type direct connection double-suction pump aims at solving the problems in the prior art, has reasonable structure and adopts a direct connection structure, can improve the transmission efficiency, reduce the noise and vibration generated in the operation process, is simple and convenient to install and maintain, the end suction type direct connection double suction pump comprises an end suction type pump body, a double suction type impeller, a pump shaft, a pump cover, a sealing ring, a motor, an impeller nut, a mechanical seal gland and the like, the end suction type direct connection double suction pump has the advantages of large working flow range, wide lift range, high unit efficiency, good axial force balance, good cavitation performance, convenient pipeline installation, small capital construction area, small pipeline hydraulic loss and the like.

Description

End suction type direct connection double-suction pump

Technical Field

The utility model belongs to the technical field of fluid machinery, especially, relate to an end is inhaled formula and is directly linked to double entry pump, can be used to flow circulation, secondary water supply occasion.

Background

The conventional double suction pump has the advantages of large flow range, wide lift range, good axial force balance and the like, however, the horizontal double-suction centrifugal pump is mainly of a middle-opening structure, usually a motor adopts a coupling to drive a water pump part to work, because the requirements on the processing precision and the installation precision are higher, the noise and the vibration are easy to generate in the working process, and the horizontal double-suction centrifugal pump has poor operation stability, short service life of the unit and large capital construction area, and the inlet and the outlet of the horizontal double-suction centrifugal pump are on the same horizontal pipeline, for the occasions of flow circulation and secondary water supply, pipelines need to be installed according to the inlet and outlet positions of the water pump, the pipelines have more turns, large floor area and large hydraulic loss, the end-suction type direct-connection single-stage pump is convenient to install, can reduce the problems, is limited by the defects of small flow range, poor cavitation performance, poor axial balance, low efficiency and the like, and is not suitable for large-flow occasions.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provide an end suction type direct-connection double suction pump, which has the advantages of large working flow range, wide lift range, high unit efficiency, good axial force balance, good cavitation performance, convenient pipeline installation, small infrastructure area, small pipeline hydraulic loss and the like, has reasonable structure, adopts a direct-connection structure, can improve the transmission efficiency, reduces the noise and the vibration generated in the operation process, is simple and convenient to install and maintain, comprises an end suction type pump body, a double suction type impeller, a pump shaft, a pump cover, a sealing ring, a motor, an impeller nut, a mechanical seal gland and the like, the end suction type pump body comprises an inlet and an outlet which are arranged at 90 degrees, and the inlet and the pump shaft of the end suction type pump body are on the same horizontal line, the double-suction impeller is provided with two liquid inlets for pressurizing liquid sucked by the liquid inlet of the end-suction pump body, axial forces generated at two ends of the double-suction impeller are equal in magnitude and opposite in direction, the axial forces are balanced with each other, so that the unit operates stably and has longer service life, the pump shaft is coaxial with the motor and is formed by one-step processing, and the concentricity of a motor shaft and the pump shaft is ensured, the end suction type pump body and the motor are arranged on a common base together, the pump cover is connected to the motor through a connecting bolt, the end suction type pump body is connected with the pump cover through a fixing bolt, two seals are arranged between the end suction type pump body and the pump cover, an impeller end sealing ring is used for sealing liquid pressurized by a double suction pump impeller, the pump cover end sealing ring is used for sealing liquid in a spiral suction chamber, so that liquid flow among different pressures is reduced, the unit loss is small, the unit efficiency is high, the operation is balanced, the sealing ring is made of copper alloy and is fixed on the end suction type pump body and the pump cover through flush screws, the self-lubricating property is achieved, gaps among the sealing ring, the end suction type pump body and the pump cover can be reduced, leakage between a high pressure side and a low pressure side is reduced, the volume loss is reduced, the unit efficiency is improved, a circulation hole is formed in the pump cover, and liquid on the high pressure, get back to the low pressure side again, take away the heat that mechanical seal working process produced, improve the running life of unit, it is right to combine the figure and detailed implementation mode below to make further detailed explanation to the utility model discloses.

Drawings

FIG. 1 is a schematic structural view of an end-suction type direct-coupled double-suction pump of the present invention; in the drawing, 1, an end suction type pump body, 2, a double suction type impeller, 3, a sealing ring, 4, an impeller nut, 5, a flat key, 6, an impeller end sealing ring, 7, a pump shaft, 8, a pump cover end sealing ring, 9, a fixing stud, 10, a pump cover, 11, a connecting bolt, 12, a motor, 13, a mechanical seal, 14, a mechanical seal gland, 15, a common base, 16, a flush screw, 101, a liquid inlet, 202, a liquid outlet, 303 and a spiral suction chamber.

Detailed Description

The end suction type direct connection double suction pump specifically comprises a end suction type pump body 1, an end suction type pump body 2, a double suction type impeller 3, a sealing ring 4, an impeller nut 5, a flat key 6, an impeller end sealing ring 7, a pump shaft 8, a pump cover end sealing ring 9, a fixing stud 10, a pump cover 11, a connecting bolt 12, a motor 13, a mechanical seal 14, a mechanical seal cover 15, a common base 16 and a flush screw, wherein the end suction type pump body 1 comprises a liquid inlet 101 and a liquid outlet 202, the liquid inlet 101 and the liquid outlet 202 are arranged at an angle of 90 degrees, the end suction type pump body is conveniently installed by a pipeline, one part of liquid entering from the liquid inlet 101 directly enters one end of the double suction type impeller 2 through a straight cone section, and the other end of the double suction type impeller 2 through a spiral suction chamber 303, so that the purposes of end suction and high steam corrosion performance are achieved, the end suction type pump body 1 comprises a spiral suction chamber 303, the pump cover 10 comprises a partial spiral suction chamber 303, the motor 12 is coaxial with the pump shaft 7 and is formed by one-step processing, the concentricity of the shaft of the motor 12 and the pump shaft 7 is ensured, the flat key 5 is fixed on the pump shaft and transmits the torque generated by the motor 12 to the double suction impeller 2, the double suction impeller 2 is arranged on the pump shaft 7, after the motor 12 rotates, the pressure of the liquid medium is increased, the double-suction pump impeller 2 is axially positioned with the pump shaft 7 through the impeller nut 4, because the double-suction pump impeller 2 is provided with two liquid inlets, the axial forces generated at the two ends are mutually balanced, the axial force balance can be realized, the unit can run in balance, the pump cover 10 is connected on the motor 12 through the connecting bolt 11, the sealing ring 3 is made of copper alloy and has self-lubricating property, the end suction type pump body 1 and the pump cover 10 are fixed through flush screws 16, and the end suction type pump body 1 and the motor 12 are installed on a common base 15 together. The end suction type double suction pump is characterized in that an end suction type pump body 1 is connected with a pump cover 10 through a fixing stud 9, two seals are arranged between the end suction type pump body 1 and the pump cover 10, an impeller end seal ring 6 is used for sealing liquid pressurized by a double suction pump impeller 2, a pump cover end seal ring 8 is used for sealing liquid in a spiral suction chamber 303, liquid flow between different pressures is reduced, unit loss is small, unit efficiency is high, and operation is balanced, a moving ring of a mechanical seal 13 is fixed on a pump shaft 7, a static ring is fixed on a mechanical seal gland 14, the mechanical seal gland 14 is fastened on the pump cover 10 through bolts so as to block the liquid flowing out of the unit between the pump cover 10 and the pump shaft 7, the end suction type direct suction type double suction pump sucks the liquid of a pipeline system from a liquid suction port 101 into the end suction type pump body 1 to be pressurized, and finally the high-pressure liquid is sent into the pipeline system through a liquid discharge port 202 in the end suction type pump body 1, and the arrow direction in the structure schematic diagram, but end suction type direct connection double entry pump the working flow scope big, the lift scope is wide, the unit is efficient, the axial force balancing is good, the cavitation performance is good, pipeline simple to operate, the capital construction area is little, pipeline hydraulic loss is little, adopt the direct connection structure, can improve transmission efficiency, reduce the noise and the vibration that produce in the operation process.

Claims (4)

1. The end suction type direct connection double suction pump is characterized in that after the motor is connected with the pump cover, the double suction type impeller is installed and fastened by the impeller nut, the end suction type pump body is installed and comprises a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are arranged at 90 degrees, and the liquid inlet and the pump shaft of the end suction type pump body are on the same horizontal line.

2. The end-suction type direct-connection double suction pump according to claim 1, characterized in that: the pump shaft is coaxial with the motor, and the end suction type pump body and the motor are installed on the common base together.

3. The end-suction type direct-connection double suction pump according to claim 1, characterized in that: the sealing ring is made of copper alloy and is fixed on the end suction type pump body and the pump cover through flush screws.

4. The end-suction type direct-connection double suction pump according to claim 1, characterized in that: the pump cover is provided with a circulating hole, so that liquid on the high-pressure side can be led to the mechanical seal position and then returns to the low-pressure side, and heat generated in the working process of the mechanical seal is taken away.

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