CN202182057U

CN202182057U - Negative pressure type submersible pump mechanical sealing chamber

Info

Publication number: CN202182057U
Application number: CN201120024414XU
Authority: CN
Inventors: 白雪峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2012-04-04
Anticipated expiration: 2021-01-21

Abstract

The utility model belongs to the technical field of a dry type motor submersible pump, which solves the problem that a mechanical seal can easily cause seepage under the action of pressure liquid when the submersible pump works. A negative pressure type submersible pump mechanical sealing chamber comprises a motor end cover, a motor rotating shaft penetrates through the motor end cover into a pump chamber to be fastened with an impeller, an impeller water inlet justly faces to the motor end cover, a tubular submersible pump water inlet is arranged at the periphery of the motor rotating shaft between the motor end cover and the impeller, a narrow annular water inlet is formed between the submersible pump water inlet and the motor end cover, and the motor end cover, the motor rotating shaft, the impeller and the submersible pump water inlet commonly form an annular space that is the mechanical sealing chamber, and the mechanical seal is arranged on a shaft hole on the outer end surface of the motor end cover in the mechanical sealing chamber and the motor rotating shaft and is a dynamic seal between the motor end cover and the motor rotating shaft.

Description

Negative pressure type submersible pump mechanical seal chamber

Technical field

The utility model belongs to dry type motor submersible pump technical field.

Background technique

The dry type motor submersible pump of existing technology, the effect of machinery sealed pressure power liquid during work, sealability is unstable, causes liquid to infiltrate easily, thereby causes the damage of motor windings and bearing.

The model utility content

It is a kind of when submersible pump is worked that the purpose of the utility model is to provide, the submersible pump mechanical seal chamber that mechanical seal is in work in the subnormal ambient.

The utility model does not change the self structure and the material of mechanical seal, and the structure of mechanical seal and material are existing public technology.The utility model only changes the structure of mechanical seal chamber, thereby realizes that mechanical seal works in subnormal ambient, has avoided mechanical seal because the effect of the liquid that is stressed and sepage.

For realizing the purpose of the utility model; Described negative pressure type submersible pump mechanical seal chamber comprises electric motor end cap; Machine shaft passes in electric motor end cap to the pump chamber and the fastening configuration of impeller; Impeller intake is over against electric motor end cap, and the machine shaft periphery between electric motor end cap to the impeller is the submersible pump water intake of tubulose, forms narrow annular water intake between submersible pump water intake and the electric motor end cap; Electric motor end cap, machine shaft, impeller and submersible pump water intake form annular space jointly; Be described mechanical seal chamber, mechanical seal is arranged on the axis hole and machine shaft of the indoor electric motor end cap exterior edge face of mechanical seal, is the dynamic seal (packing) between electric motor end cap and the machine shaft.

When submersible pump was worked, mechanical seal is indoor to be received suction and becomes negative pressuren zone, and mechanical seal is in works in the subnormal ambient, has avoided mechanical seal because of the effect of the liquid that is under pressure and has caused sepage.

Description of drawings

The drawing of accompanying drawing is explained as follows:

Fig. 1 is the schematic representation of the utility model negative pressure type submersible pump mechanical seal chamber.

Fig. 2 is the partial sectional perspective view of the utility model negative pressure type submersible pump mechanical seal chamber.

Fig. 3 is the plane partial sectional view of the utility model negative pressure type submersible pump mechanical seal chamber.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the utility model negative pressure type submersible pump mechanical seal chamber is done further to detail:

The utility model negative pressure type submersible pump mechanical seal chamber comprises electric motor end cap (1), and machine shaft (2) passes in electric motor end cap (1) to the pump chamber (6) and the fastening configuration of impeller (4).Described impeller intake (9) is over against electric motor end cap (1), and machine shaft (2) periphery between electric motor end cap (1) to the impeller (4) is the submersible pump water intake (5) of tubulose, forms narrow annular water intake (8) between submersible pump water intake (5) and the electric motor end cap (1).Electric motor end cap (1), machine shaft (2), impeller (4) form annular space, promptly described mechanical seal chamber (7) jointly with submersible pump water intake (5).Mechanical seal (3) is arranged on the axis hole and machine shaft (2) of electric motor end cap (1) exterior edge face in the mechanical seal chamber (7), is the dynamic seal (packing) between electric motor end cap (1) and the machine shaft (2).

When submersible pump is worked, receive suction in mechanical seal chamber (7) and become negative pressuren zone, mechanical seal (3) is in works in the subnormal ambient, has avoided mechanical seal (3) because of the effect of the liquid that is under pressure and has caused sepage.

The water cross-sectional sizes of crossing of annular water intake confirmed by the flow size of submersible pump, according to actual tests, and 1m per hour ³Flow water intake sectional area get about 0.5cm ²For good.

When the dry type motor submersible pump of existing technology was worked, the difficult problem of mechanical seal easy sepage under the effect of pressured fluid can't solve so far, and therefore all be affected the working life of motor.The dry type motor submersible pump of existing technology all need fill machine oil, because of the sepage of mechanical seal, must cause leaking outside of machine oil, thereby environment is produced pollution.

This negative pressure type submersible pump mechanical seal cell structure is simple; Practice thrift cost, produce easily, when thoroughly preventing the mechanical seal sepage; Also shortened the distance between bearing to the impeller; Significantly reduce the radial force of bearing, prolonged the working life of bearing greatly, prolonged the working life of motor simultaneously greatly.Used the submersible pump of present technique need not fill machine oil, so than the environmental protection of existing technology.

Claims

1. negative pressure type submersible pump mechanical seal chamber; Comprise electric motor end cap (1); Machine shaft (2) passes in electric motor end cap (1) to the pump chamber (6) and the fastening configuration of impeller (4); Impeller intake (9) is characterized in that over against electric motor end cap (1) machine shaft (2) periphery between described electric motor end cap (1) to the impeller (4) is the submersible pump water intake (5) of tubulose, forms narrow annular water intake (8) between submersible pump water intake (5) and the electric motor end cap (1); Electric motor end cap (1), machine shaft (2), impeller (4) form annular space jointly with submersible pump water intake (5); Be described mechanical seal chamber (7), mechanical seal (3) is arranged on the axis hole and machine shaft (2) of electric motor end cap (1) exterior edge face in the mechanical seal chamber (7), is the dynamic seal (packing) between electric motor end cap (1) and the machine shaft (2).