CN2553146Y

CN2553146Y - Submersible electric pump with pressure-reducing protector

Info

Publication number: CN2553146Y
Application number: CN 01268334
Authority: CN
Inventors: 王保卫
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-22
Filing date: 2001-10-22
Publication date: 2003-05-28
Anticipated expiration: 2011-10-22

Abstract

The utility model relates to a submersible pump with pressure relief protection, belonging to the technical field of dry-type or oil-filled submersible pumps, which is characterized in that: a connecting section is additionally arranged between a pump and a motor, and is punched with holes to form a pressure relief chamber. When the dynamic seal at the shaft extension of the pump is damaged, the high pressure water inside the pump body can be rapidly changed into atmospheric pressure water, thus preventing the water flow from entering the motor cavity to blow out the coil inside the motor cavity following the damage of the dynamic seal at the shaft extension of the motor. The utility model has the advantages of providing users with more reliable products, generating more profits for enterprise users and upgrading the development scale of the submersible pump industry in China.

Description

The Submerged Motor Pumps of band pressure reducing protection

One, technical field

The claimed affiliated technical field of technological scheme of the utility model is an electric pump, especially dry type or oil-filled type Submerged Motor Pumps.

Two, background technique

Submerged Motor Pumps is motor directly to be linked to each other with water pump unite two into one, and together pulls the plug, form a kind of simple to operate, unique pump class of compact structure.

Submerged Motor Pumps mainly is made up of water pump, submersible electric motor and lifting pipe and cable and control apparatus.The power supply on ground is defeated by motor under water by the water-proof cable that is attached on the lifting pipe.Deliver to ground through the water that pump is carried by lifting pipe.

Submersible electric motor is a threephase asynchronous, mainly is made up of stator, rotor, shell, bearing and thrust-bearing.Water pump mainly is made up of impeller, pump case and and motor coaxle.

Submerged Motor Pumps mainly is applicable to the mixing material of carrying sewage or containing insoluble solid thing such as silt, to industrial and mineral, building, life sewage effluent dirt particularly suitable.Also can be used for flood control and pump general clear water.Submerged Motor Pumps has saved many management equipments and building waterborne, and running noises is little under water, is well suited for for the quiet place of working environment requirement, as the water supply and drainage in school, hospital, hotel etc.Because the advantage of Submerged Motor Pumps is a lot, developing very soon over nearly 20 years, be widely used in all departments of national economy in China.

On the other hand, Submerged Motor Pumps since all rotatable parts all pull the plug, to many parts and be connected with very high requirement.Particularly Submerged Motor Pumps adopts motor to be connected with water pump is coaxial, enter in the motor cavity in order to guarantee that high pressure water in the pump housing is unlikely, have strict requirement reliably to insulate to guarantee the staor winding that motor pulls the plug for a long time to motive sealing (spindle is stretched the mechanical seal or the outside framework oil seal at place).

The motor stator winding of dry-type submersible pump is with common enameled cable coiling, and motor the planted agent keep dry state, can not watered and wetting, therefore, tight waterproof measure must be arranged.Motive sealing can stop is with the working medium of certain pressure to enter motor cavity.

Sealing comprises static seal and motive sealing.Static seal is meant the fixing ring in " O " of each stop portion of motor type rubber ring or sealing part; Motive sealing is meant the mechanical seal or the outside framework oil seal at shaft extension place.For the purpose of reliable, particularly normal employing mechanical seal adds outside framework oil seal in dry diving motor and oil-filled type submersible electric motor.

Motive sealing is the critical component of Submerged Motor Pumps, and can its quality directly influences motor safe operation.When damaging, the friction surface of dynamic and static abrading block can cause sealability to reduce.Thereby can cause stator winding inter-turn short circuit or phase fault to burn motor coil in the time of in working medium enters into motor cavity.

Three, summary of the invention

Technical problem to be solved in the utility model is to set up the decompression storehouse between water pump and motor, when the motive sealing at water pump shaft extension place is impaired,, the high pressure water in the pump housing avoids entering motor interior after the motive sealing at current punch damage motor shaft extension place thereby being converted into water at atmospheric pressure rapidly in the decompression storehouse.

The technological scheme that the utility model solves this technical problem employing is to set up connecting section and punching (can be a hole, also can be a plurality of holes) on connecting section between water pump and motor.Connecting section with holes has just constituted the decompression storehouse.

The beneficial effects of the utility model are when the motive sealing at water pump shaft extension place is impaired, and the high pressure water in the pump housing directly is not pressed into motor interior but is pressed in the connecting section.Owing to the water in porose on the connecting section and these holes and the well is logical, thereby rapid the communicating with well water of high pressure water of compressing into connecting section becomes water at atmospheric pressure.So, the impact of high pressure water has just been avoided in the motive sealing at motor shaft extension place, has improved the working life of motive sealing, is unlikely allowing water enter in the motor cavity.So, motor just can not burn out because of short circuit.This technology is the difficult problem that many for many years producers can't overcome, the breakthrough of this technology provides technical support for the prolongation in China's submersible pump working life, for the user provides reliable product,, the development of China's submersible pump industry is attained a yet higher goal for enterprise has brought bigger profit.

Four, description of drawings

Fig. 1 is a kind of sectional view of the present utility model.

Among the figure: 1, handle; 2, cable cover(ing); 3, bearing; 4, rotor; 5, stator; 6, the motive sealing at motor shaft extension place; 7, decompression storehouse; 8, the motive sealing at water pump shaft extension place; 9, hole; 10, connecting section; 11, water pump body; 12, filter screen.

Five, embodiment

Can list many embodiments according to the utility model.Present embodiment is a kind of in the utility model.Present embodiment mainly is made up of the motive sealing (6) at handle (1), cable cover(ing) (2), bearing (3), rotor (4), stator (5), motor shaft extension place, motive sealing (8), hole (9), connecting section (10), water pump body (11) and the filter screen (12) at reduce pressure storehouse (7), water pump shaft extension place.Wherein, connecting section (10) is located between water pump body (11) and the submersible electric motor, is equipped with a plurality of holes (9) on the connecting section (10) of round barrel shape, and the connecting section of (9) with holes (10) has just constituted decompression storehouse (7).

Claims

1, a kind of Submerged Motor Pumps mainly is made up of water pump, motor; Be connected as one by connecting section between water pump and the motor, it is characterized in that: on connecting section, be equipped with the hole.