CN204226167U - A kind of mechanical seal structure used on high pressure and deep well water pump - Google Patents

Abstract

The utility model discloses a kind of mechanical seal structure used on high pressure and deep well water pump, comprise the seal sleeve be sleeved on motor shaft, the copper sheathing with its interference fit is provided with in described seal sleeve, described copper sheathing and motor shaft Spielpassung, be connected with end cover at described seal sleeve away from the end of water pump body, described end cover is sleeved on motor shaft; Described end cover and described seal sleeve form annular seal space around motor shaft, in described annular seal space, mechanical sealing linkage ring and mechanical sealing static ring is clamped with between described copper sheathing and described end cover, described mechanical sealing linkage ring and described mechanical sealing static ring are sleeved on motor shaft, described mechanical sealing static ring and described end cover interference fit, described mechanical sealing static ring and described motor shaft Spielpassung, described mechanical sealing linkage ring and motor shaft interference fit, described mechanical sealing linkage ring and described mechanical sealing static ring form end face seal.Working life of the present utility model is longer.

Description

A kind of mechanical seal structure used on high pressure and deep well water pump

Technical field

The utility model relates to a kind of mechanical seal structure, particularly a kind of mechanical seal structure used on high pressure and deep well water pump.

Background technique

Current high-frequency straight seam welded pipe is a kind of conventional high-quality steel pipe in transfer oil and natural gas line, because the many merits such as its steel strength is high, discharge pressure is high, caliber precision is high, manufacturing efficiency is high, cost is low use field to be used widely at On The Oil And Gas Transportation and steel structure.Along with the fast development of offshore petroleum industry, the demand for high voltage bearing ERW increases gradually.

Hydraulic press is the visual plant of HFW630 high-frequency straight welded pipe production line finishing department, and the steel pipe that each root is produced all needs to do pressure test to check it whether qualified through it, and this is directly connected to the quality of steel pipe.Concerning hydraulic press, it is a large hydraulic system, and it comprises makes the device drives part of carrier with hydraulic oil and do the work pressure test system of carrier with pressure testing liquid, and both adopt fluid exerts pressure, its key issue is all how to seal.The wherein sealing problem of high pressure and deep well water pump, is directly connected to working efficiency and the working life of water pump.

At present, the hydraulic press water pump for HFW630 high-frequency straight welded pipe production line adopts the deep-well pump of 185kw, and the large hydraulic pressure of this pump duty is high, adopts packing_seal form.Because pump rotary speed is high, containing impurity such as iron rust in pressure testing liquid, packing_seal part is very short for working life, changes once only to use within one day, just to start to leak, and drive motor has four cooling blower relief openings above the place of leaking, the water pressure spilt is higher, often enter motor internal from exhaust ports, cause burn-down of electric motor, keep in repair expense about 20,000 yuan, therefore workshop often arranges special messenger to keep an eye on, once leak namely change packing at once.

Model utility content

The utility model is for solving in known technology the technical problem existed and the mechanical seal structure used on high pressure and deep well water pump providing a kind of working life longer.

The technological scheme that the utility model is taked for the technical problem existed in solution known technology is: a kind of mechanical seal structure used on high pressure and deep well water pump, comprise the seal sleeve be sleeved on motor shaft, the copper sheathing with its interference fit is provided with in described seal sleeve, described copper sheathing and motor shaft Spielpassung, be connected with end cover at described seal sleeve away from the end of water pump body, described end cover is sleeved on motor shaft;

Described end cover and described seal sleeve form annular seal space around motor shaft, in described annular seal space, mechanical sealing linkage ring and mechanical sealing static ring is clamped with between described copper sheathing and described end cover, described mechanical sealing linkage ring and described mechanical sealing static ring are sleeved on motor shaft, described mechanical sealing static ring and described end cover interference fit, described mechanical sealing static ring and described motor shaft Spielpassung, described mechanical sealing linkage ring and motor shaft interference fit, described mechanical sealing linkage ring and described mechanical sealing static ring form end face seal.

The advantage that the utility model has and good effect are: adopt the good mechanical seal of overall performance to replace former graphite asbestos seal, fixed position moves to motor shaft output from not easily fixing motor shaft end, and structure is optimized more, easy installation and reliable; The matching gap of fixed block reduces, and makes water pump overall co-ordination more tight, makes sealing more safe and reliable.And then improve the whole service life of water pump, enhance the durability of sealing, reduce cost of production, improve the working efficiency of water pump.The utility model is the very reliable and effective deep water seal structure of water pump of one.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

In figure: 1, motor shaft, 2, copper sheathing, 3, seal sleeve, 4, mechanical sealing linkage ring, 5, bolt, 6, end cover, 7, mechanical sealing static ring.

Embodiment

For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:

Refer to Fig. 1, the mechanical seal structure that high pressure and deep well water pump uses, comprises the seal sleeve 3 be sleeved on motor shaft 1, is provided with the copper sheathing 2 with its interference fit in described seal sleeve 3, described copper sheathing 2 and motor shaft 1 Spielpassung, ensure that motor shaft 1 rotates normally.Be connected with end cover 6 at described seal sleeve 3 away from the end of water pump body, the two adopts bolt 5 to connect, and described end cover 6 is sleeved on motor shaft 1.

Described end cover 6 and described seal sleeve 3 form annular seal space around motor shaft 1, in described annular seal space, mechanical sealing linkage ring 4 and mechanical sealing static ring 7 is clamped with between described copper sheathing 2 and described end cover 6, described mechanical sealing linkage ring 4 and described mechanical sealing static ring 7 are sleeved on motor shaft 1, described mechanical sealing static ring 7 and described end cover 6 interference fit, described mechanical sealing static ring 7 and described motor shaft 1 Spielpassung, described mechanical sealing static ring 7 does not rotate with motor shaft 1; Described mechanical sealing linkage ring 4 and motor shaft 1 interference fit, rotate with motor shaft 1, described mechanical sealing linkage ring 4 and described mechanical sealing static ring 7 form end face seal, and the spring in mechanical sealing linkage ring 4 is in pressured state all the time.

Working principle of the present utility model:

When driven by motor motor shaft 1 rotates, motor shaft 1 rotates in copper sheathing 2, mechanical sealing linkage ring 4 rotates along with motor shaft 1, water cannot flow out from axle and mechanical sealing linkage ring 4, mechanical sealing linkage ring 4 and mechanical sealing static ring 7 extrude by connecting bolt 5, both surface of contact are that ceramic plane can play good end face seal effect, therefore water cannot flow out from mechanical sealing linkage ring 4 and mechanical sealing static ring 7 surface of contact, mechanical sealing static ring 7 and mechanical sealing end cover 6 adopt interference fit, and with motor shaft 1 Spielpassung, therefore remain static, can only enter in the annular seal space between seal sleeve 3 and end cover 6 from motor shaft water out, water in chamber cannot enter into motor by mechanical sealing static ring 7 and the Interference contact face of end cover 6, this completes the sealing of whole motor shaft and motor.The utility model by utilizing mechanical seal principle to achieve sealing effect on motor shaft.

Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, can also make a lot of form, these all belong within protection domain of the present utility model.

Claims (1)

1. the mechanical seal structure used on high pressure and deep well water pump, it is characterized in that, comprise the seal sleeve be sleeved on motor shaft, the copper sheathing with its interference fit is provided with in described seal sleeve, described copper sheathing and motor shaft Spielpassung, be connected with end cover at described seal sleeve away from the end of water pump body, described end cover is sleeved on motor shaft;

Described end cover and described seal sleeve form annular seal space around motor shaft, in described annular seal space, mechanical sealing linkage ring and mechanical sealing static ring is clamped with between described copper sheathing and described end cover, described mechanical sealing linkage ring and described mechanical sealing static ring are sleeved on motor shaft, described mechanical sealing static ring and described end cover interference fit, described mechanical sealing static ring and described motor shaft Spielpassung, described mechanical sealing linkage ring and motor shaft interference fit, described mechanical sealing linkage ring and described mechanical sealing static ring form end face seal.