CN2443175Y - Submersible pump - Google Patents

Abstract

The utility model relates to a submersible pump which mainly comprises a motor and a pump. The utility model is characterized in that a press cap on one side of a motor body is provided with air holes adjacent with soft water sacs arranged in one end cap. Simultaneously, the structure of a sealing ring on a pump shaft is improved, the big end surface is provided with a ring groove, and the middle part is hollow; a capacitor is externally arranged in a pin box, and simultaneously a line is connected in series with a fuse. Via the improvement, the friction force and the shearing force of the pump shaft and the sealing ring can be controlled, so the service life of the submersible pump is prolonged. By means of the external pin box and the added fuse, the motor can be further protected against the short circuit. The utility model has the advantages of reasonable design and simple structure.

Description

Submersible pump

The utility model relates to a kind of submersible pump.

Though existing submersible pump has overheated, overcurrent protection mechanism, the rapid problem that raises of its internal pressure that temperature raises in the time of can not effectively solving machine operation, gas expands and causes.Gas during machine operation in motor and the oil sealing is not the while expanded by heating, and the gas in the motor warms up earlier, and its pressurized gas enter oil sealing from motor shaft by seal ring, equate with the oil sealing internal pressure in motor; The rising of oil sealing internal pressure makes the surface of contact of seal ring and pump shaft be pressed tightlyer, this not only strengthened motor load, power consumption is increased, and pump shaft is increased greatly to the shearing force of seal ring, seriously influenced the working life of submersible pump seal ring.When motor quits work, though and the gas that enters in the oil sealing also cools off contraction, but there should be no return in the motor, can only put aside in oil sealing, make along with starting repeatedly, gas density is increasing in the oil sealing, the increase that friction between pump shaft and the seal ring, shearing force all are directly proportional with the increase of oil sealing internal pressure.

The purpose of this utility model is: gas pressure in a kind of can regulate motor is provided, prolongs the motor for submerged pump submersible pump in working life.

Its purpose realizes by following technical solution.

Submersible pump of the present utility model comprises motor and water pump, it is characterized in that:

A, motor body one end gland 6 are provided with more than one pore 5, are provided with soft air water capsule 9, one tension hollow bolts in the end cap in gland 6 outsides through soft air water capsule 9 and end cap, and stretch in outside the end cap;

The overhanging pump shaft 13 of oil sealing 1 internal rotor of B, the motor body the other end is provided with coniform seal ring 10, and the large end face of described seal ring 10 is provided with an annular groove, and the middle part is a hollow shape;

C, motor organism bottom are provided with the fixing clamp 3 of a fixing cord;

The lead wire terminal of D, motor engine body exterior connects a latch box, is provided with electric capacity in the box, and is connected in series a fus.

The utlity model has the advantage of several respects:

One, owing to adopted soft air water capsule structure, after gas expands in machine operation heats up it, oppress soft air water capsule, with the gas in the soft air water capsule or water to external pressure in the hope of the body internal and external pressure balance, thereby prevented the appearance of three problems, 1, the pressurized gas static seal that forces one's way through the barrier, 2, the trickle blow hole of the body that forces one's way through the barrier, 3, gas enters oil sealing after expanding; Prevent the increase of friction, shearing force between seal ring and the pump shaft, prolonged the working life of submersible pump.

Two, by the improvement to ring structure, gas is difficult for entering oil sealing after expanding in machine operation heats up it, makes it have the two way sealed effect.

Three, external latch box is put in the taking-up of the electric capacity in the former end cap, soft air water capsule is set in the end cap, thereby has guaranteed not change the volume of submersible pump.

Four, set up fixing clamp in the motor, guaranteed the reliability of machine operation.Be connected in series fus in the latch box, can guarantee that pump is worn because of motive sealing or other reason when causing into water in long-term operation, two leads in the lead fixed folder are communicated with when causing short circuit, and fus disconnects, and plays the effect of further protection motor for submerged pump.

Fig. 1 is the utility model structural representation,

Fig. 2 is the utility model ring structure schematic representation,

Fig. 3 is the external latch box of a utility model structural representation.

The utility model is further described below by infinite embodiment.

The utility model submersible pump comprises motor and water pump.

Have a pore 5 on the motor body 17 1 end glands 6, soft air water capsule 9, one tension hollow bolts are installed through soft air water capsule 9 and end cap in the end cap in gland 6 outsides, and are stretched in outside the end cap, and by nut 7 and tight.

Relative suit two coniform rubber seal 10 on the rotor 12 overhanging pump shafts 13 in the oil sealing 1 of motor body 17 the other ends, has a circular groove on the large end face of described rubber seal 10, and the middle part is a hollow shape; Two rubber seal, 10 outside suits spring 2.

Motor body 17 inside stators 4 one sides are equipped with the fixing clamp 3 of a fixing cord, and fixing clamp 3 will enter the interior lead fixed of motor body together.

The terminal of motor body 17 outer leads 11 connect a latch box 14, are laying electric capacity 15 in the box, serial connection one fus 16 on its lead.

In the use, when the gas swelling pressure increase in the machine operation temperature raises it, after water in the soft air water capsule 9 or gas are pressed, can discharge the pump housing by the hollow tubular of turnbuckle 8, thereby pump housing external and internal pressure is equated, otherwise stop using then when motor.

By improvement, make it have the effect of two way sealed to seal ring.Make expanding gas be difficult for entering oil sealing from pump shaft.

In order not increase the submersible pump volume, electric capacity is external, put into the latch box; Be connected in series simultaneously a fus in the line, when pump is worn because of motive sealing in the long-term operation process or other reason when the two leads connection in the lead fixed folder causes short circuit when causing water into, the disconnection of fus can further play a protective role to motor.

Claims (1)

1, submersible pump comprises motor and water pump, it is characterized in that:

A, motor body one end gland 6 are provided with more than one pore 5, are provided with soft air water capsule 9, one tension hollow bolts in the end cap in gland 6 outsides through soft air water capsule 9 and end cap, and stretch in outside the end cap;

The overhanging pump shaft 13 of oil sealing 1 internal rotor of B, the motor body the other end is provided with coniform seal ring 10, and the large end face of described seal ring 10 is provided with an annular groove, and the middle part is a hollow shape;

C, motor organism bottom inboard are provided with the fixing clamp 3 of a fixing cord;

The lead wire terminal of D, motor engine body exterior connects a latch box, is provided with electric capacity in the box, and is connected in series a fus.

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