CN2334931Y - Screwing in type thread connection mechanical sealing - Google Patents

Abstract

The utility model relates to the mechanical seal device of an oil-charging type submersible electric pump, particularly a screwing in type thread connection mechanical seal device. The utility model is mainly composed of a shaft sleeve, a copper shell, a medium end static ring, an electric motor end static ring, a rotary ring, a rotary support frame, a pressure spring and a seal ring. The box body of the copper shell and the medium end static ring are provided with screw threads, and are matched. The utility model prevents the medium end static ring from doing axially movement in deep water level, and guarantees the normal work of the submersible electric pump in the deep water level. The utility model has the advantages of simple structure, and safe and reliable use, and is the ideal mechanical seal device of an oil-charging type submersible electric pump.

Description

The screw-in mechanical seal that is threaded

The utility model relates to a kind of mechanical seal of oil-filled type Submerged Motor Pumps, relates in particular to the mechanical seal that is threaded of a kind of screw-in.

In the prior art, the mechanical seal of oil-filled type Submerged Motor Pumps is mainly by the copper shell, axle sleeve, stationary ring, rotating ring, compositions such as runing rest, its media end is identical with the seal form of motor side, this mechanical seal mainly acts on rotating ring by pressure spring, rotating ring acts on stationary ring, the incompatible realization mechanical seal that matches of stationary ring and copper shell end face, and its axial bearing capacity is 0.08-0.1MPA, when generally the depth of water is greater than 10 meters, medium greater than 0.1MPA, causes the media end stationary ring to do axial displacement to the pressure of mechanical seal stationary ring, and sealing state is damaged, thereby cause electric pump motor to burn, jeopardize the adverse consequences of personal safety.

The purpose of this utility model is to provide a kind of good seal performance, and the screw-in that can adapt to the job requirement of the Submerged Motor Pumps deep water mechanical seal that is threaded.

The utility model is the mechanical seal that is threaded of a kind of screw-in, mainly by axle sleeve, and copper shell, media end stationary ring, the motor side stationary ring, rotating ring, runing rest, stage clip, seal ring constitutes, and is shaped on screw thread on the copper shell upper cartridge body, also is shaped on screw thread on the media end stationary ring, and both match.

After adopting said structure, when Submerged Motor Pumps is worked at deep water, when pressure medium during greater than the stage clip active force, because the binding thread Placement of media end stationary ring and copper shell upper cartridge body, it can't be moved to motor side, thereby stoped medium to enter in the copper shell effectively, guaranteed the normal operation of Submerged Motor Pumps in the deep water position.Simultaneously, can avoid the media end stationary ring to cause the problem that rubber damping lost efficacy because of being heated.

Below in conjunction with accompanying drawing the utility model embodiment is described in further detail.

Fig. 1 is the utility model structural representation.

Fig. 2 is a media end stationary ring structural representation.

Fig. 3 is the copper shell upper cartridge body structural representation that is shaped on screw thread.

The utility model is a kind of mechanical seal of tidewater electric pump, connecting in the copper shell 2 that forms with lower box body 18 by upper cartridge body 15, axle sleeve 1 is housed, seal ring 8 is housed in the axle sleeve 1, between copper shell 2 upper cartridge bodies 15 and axle sleeve 1, media end stationary ring 4 is housed, seal ring 3 is shaped on screw thread 17, and also is shaped on screw thread 16 in copper shell 2 upper cartridge body 15 on the media end stationary ring 4, both closely cooperate, thereby make media end stationary ring 4 moving axially.Be connected with rotating ring 5 below the media end stationary ring, the bottom of rotating ring 5 is connected with runing rest 7.At axle sleeve 1, rotating ring 5 is combined with seal ring 6 between runing rest 7 threes, to prevent that medium from entering motor side from the outer wall of axle sleeve 1, in the lower box body 18 of copper shell 2, assemble runing rest 13, rotating ring 10 with known manner in the prior art, motor side stationary ring 11, seal ring 12,14.Stage clip 9 is mounted between two runing rests 7,13, under the effect of spring force, makes two end faces of copper shell 2 keep certain sealing.

When using the utility model, when pressure medium greater than 9 pairs of runing rests 7 of stage clip, during 13 active force, owing to adopt the screw threads for fastening Placement between media end stationary ring 4 and copper shell 2 upper cartridge bodies 15, media end stationary ring 4 can not move axially, make medium can't enter into the motor of Submerged Motor Pumps, thereby the motor of guaranteeing Submerged Motor Pumps can keep normally operation when the deep water position.

Claims (1)

1. screw-in mechanical seal that is threaded, mainly by axle sleeve (1), copper shell (2), media end stationary ring (4), motor side stationary ring (11), rotating ring (5), (10), runing rest (7), (13), stage clip (9), seal ring (3), (6), (8), (12), (14) constitute, it is characterized in that being shaped on screw thread (16) on copper shell (2) upper cartridge body (15), also be shaped on screw thread (17) on the media end stationary ring (4), both match.

Images