CN2199343Y

CN2199343Y - Sealed oil chamber for dry immersible pump

Info

Publication number: CN2199343Y
Application number: CN 94242435
Authority: CN
Inventors: 毛骥; 陈祥云; 邰崇良
Original assignee: Taizhou Diving Water & Electricity Pump Factory
Current assignee: Taizhou Diving Water & Electricity Pump Factory
Priority date: 1994-08-22
Filing date: 1994-08-22
Publication date: 1995-05-31
Anticipated expiration: 2004-08-22

Abstract

The utility model discloses a sealing oil chamber for dry submersible pumps, which relates to the improvement of the structure of a sealing oil chamber. The service life of the mechanical seal is extended by adding reinforced seal at the shaft extending position on the side of the pump chamber of the oil chamber, and through air holes which are arranged on the lower side of a motor chamber and the outer wall of the oil chamber, are communicated with the motor chamber and are isolated from the oil chamber, and the sealing screw bolts of the air holes, the sealing performance of the motor chamber can be inspected conveniently during the regular inspection in running, so that the normal work of an electric pump can be guaranteed.

Description

Sealed oil chamber for dry immersible pump

The utility model relates to the improvement of the structure of dry-type submersible pump sealing grease chamber.

We know that dry-type submersible pump is made up of motor, water pump and sealing grease chamber three parts.The oil of filling insulation, lubricating in the sealing grease chamber separates with Sealing between motor part and the water pump part, enters motor cavity to stop uninsulated water, thereby causes motor to damage.Because sealing exists problems such as the assembly quality, working life of inevitable leakage and Sealing, the quality of sealing can not get guaranteeing.In order to guarantee the motor proper functioning, must set about: 1. the life-span and the assembly quality that improve Sealing from following two aspects; 2. in time check out the damaged condition of Sealing, safeguard with timely replacing.In the prior art, seal arrangement adopts " O " RunddichtringO to make static seal, adopts double mechanical seal as motive sealing.Owing to often contain a large amount of sand grains in the sewage, so fragile; Have an oilhole on grease chamber's sidewall, a corresponding sealing bolt is housed on it, can check out grease chamber's sealing situation from its water content of machine oil that oil-in chamber is poured out; Have a pore at the top of motor, this pore communicates with motor cavity, during in order to assembling motor seal is inflated inspection; These structures can be checked out grease chamber's sealing and motor seal assembly quality easily when assembling, also can in use in time check out grease chamber's sealing situation, but can not check out the motor seal situation.

The utility model aims to provide one and improves airtight quality, prolongs the novel seal grease chamber structure that seal durability also can in time be checked out the sealing situation.

The utility model is achieved in that on the axle in the outside of double mechanical seal and installs outside framework oil seal additional; Have pore on the outer side wall of sealing grease chamber, its position is below motor cavity, and the bottom of this pore and motor cavity interlinks, and is isolated with oil pocket, and sealing bolt correspondingly is housed on the pore.

Below with reference to drawings and Examples, the utility model is further described:

Accompanying drawing is the structural representation of sealing grease chamber

Sequence number is respectively among the figure: 1. oil-in chamber; 2. oilhole bolt and seal ring; 3. pore bolt and seal ring; 4. double mechanical seal; 5. outside framework oil seal; 6. rubber gasket; 7. grease chamber's end cap; The axle; 9. motor cavity.

As shown in the figure: outside framework oil seal (5) is contained in the axle (8) of the pump chamber side of grease chamber and stretches the place, is used for sand control, and this has just improved the working life of sealing greatly.Pore is positioned on the outer side wall of grease chamber, and be positioned at motor cavity (9) below, port sealing bolt and seal ring (3) are housed on the pore, when assembling, turn on this bolt, charge into pressurized air and can check the motor seal performance, be in operation make regular check on the time, turn on this bolt, because of pore is positioned at below the motor cavity (9), do not flow out if motor cavity has any liquid, illustrate that then the electric pump seal operation is normal; Answer running check if flow out the oil of trace; As flow out a large amount of water mixed oils and then should take electric pump apart and check Sealing, change the Sealings such as mechanical seal, the seal of " O " type, outside framework oil seal of all inefficacies.

Installing additional of outside framework oil seal makes airtight quality and working life greatly improve, pore and sealing bolt thereof and feasible the inspection conveniently, thus the proper functioning of assurance electric pump has good price performance.

Claims

1, a kind of dry-type submersible pump seals the grease chamber, comprise oil-in chamber, grease chamber's end cap and rubber gasket, be positioned at the oilhole and oilhole bolt with matching and the seal ring that interlink with oil-in chamber on the oil pocket wall, be set in the Double End mechanism sealing on the axle, it is characterized in that it also comprise be positioned on the oil-in chamber outer wall interlink with motor cavity and with isolated pore of oil-in chamber and pore bolt and the seal ring that cooperates with it, pore be positioned at motor cavity below, it is opened on the bottom of motor cavity.

2, dry-type submersible pump according to claim 1 seals the grease chamber, it is characterized in that it also comprises an outside framework oil seal, and it is positioned at the shaft extension place of the pump chamber side of grease chamber.