CN106870442A

CN106870442A - The sand control installation of motor for submerged pump

Info

Publication number: CN106870442A
Application number: CN201510923784.XA
Authority: CN
Inventors: 薛俊宏
Original assignee: Tianjin Zhenda Pump Co Ltd
Current assignee: Tianjin Zhenda Pump Co Ltd
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2017-06-20

Abstract

The present invention provides the sand control installation of motor for submerged pump, including motor case, motor shaft, end cover, outside framework oil seal and sand-throwing ring, and wherein sand-throwing ring is set on motor shaft, and positioned at the top of end cover；End cover includes upper end cover and lower end cover, a plane and a setting circle step are processed on the inside of upper end cover, outside framework oil seal is fixedly mounted on setting circle step, the bottom of outside framework oil seal is provided with antifriction pad, it is located between outside framework oil seal and lower end cover, the top at the edge of lower end cover and the shell wall contact position sealing welding of motor case.The beneficial effects of the invention are as follows good seal performance, production efficiency is high, can effectively prevent silt particle from entering motor, improves the service life of submersible motor.

Description

The sand control installation of motor for submerged pump

Technical field

The present invention relates to a kind of sealing structure, more particularly to a kind of sand control installation of motor for submerged pump.

Background technology

Submersible motor is operated in water, and anti-silt particle and watertightness are one of key properties of submersible motor.It is existing Some submersible motors are strict to the water quality requirement of conveyed water, silt content in water specified in national standard No more than 0.01%, and this numerical value is often significantly larger than in real work, because silt particle easily enters electricity Between arbor and dynamic sealing, make motor shaft and seal because of the Fast Wearing of silt particle earlier period damage, so that greatly The earth reduces the service life of submersible motor, job schedule is influenceed, while also increasing cost.At present, Some submersible motors only set envelope sand lid in the upper end of submersible motor groove, and this set can not effectively hinder Gear silt particle, makes silt particle be accumulated in the seal groove of submersible motor through envelope sand lid, by submersible motor not Disconnected rotation, silt particle is brought into the inside of submersible motor, reduces the service life of submersible motor.Some divings The anti-silt particle structure of motor, is connected with motor shaft using cast iron sand-throwing ring by flat key, and sand-throwing ring top It is plane, and there is gap in the junction of this mode, easily assemble silt particle, and then cause silt particle to pass through Gap enters guide shaft bearing inner chamber along motor shaft, ultimately causes oil sealing, guide bearing and weares and teares rapidly, or even burns Ruin motor.

Therefore, design is a kind of can effectively stop the diving that silt particle enters in oil sealing, the guide bearing of submersible motor The sand prevention seal structure of motor, is the current technical issues that need to address.

The content of the invention

The problem to be solved in the present invention is to provide a kind of good seal performance, and production efficiency is high, long service life, The sand control installation of the motor for submerged pump of the abrasion of oil sealing and guide bearing can be effectively reduced, it is existing so as to overcome Deficiency in technology.

In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of motor for submerged pump it is anti- Sand device, including motor case, motor shaft, end cover, outside framework oil seal and sand-throwing ring, it is described to get rid of sand Ring set is located on motor shaft, and positioned at the top of end cover, the end cover includes upper end cover With lower end cover, a plane and a setting circle step are processed on the inside of the upper end cover, The outside framework oil seal is fixedly mounted on setting circle step, and the bottom of the outside framework oil seal is provided with antifriction Piece, it is located between outside framework oil seal and lower end cover, top and the electricity at the edge of the lower end cover The shell wall contact position sealing welding of machine casing.

Preferably, the upper end of the sand-throwing ring is in have triangular loop in scalene cone, the sand-throwing ring The section in chamber, its triangle ring cavity has the through hole that can be communicated with outside.

Further say, sealing ring is also arranged with the motor shaft, and the sealing ring is located at outside framework oil seal Top, and outside framework oil seal mutually sticks together with sealing ring.

Further say, O-ring seal is provided between the antifriction pad and lower end cover.

Further say, the edge of the lower end cover is provided with projection, and the projection is stuck in the electricity At the inwall of machine casing；The raised brim of the bulge-structure of the lower end cover is extruding bending structure.

The invention has the advantages that：

1st, sand-throwing ring is cased with motor shaft, motor shaft drives sand-throwing ring to rotate, by the height of sand-throwing ring Speed is rotated, and by the triangle ring cavity in it and the through hole communicated with outside, water flow rotary is driven, by silt particle Motor shaft and sand-throwing ring surface are thrown away, the purpose of anti-sand wear is reached；And outside framework oil seal and sealed end In the absence of friction between lid, so that the sealing structure reduces abrasion.

2nd, lower end cover is closed with motor case is connected, and plays good sealing effectiveness, it is ensured that The airtight performance of whole submersible motor, reduces the abrasion of oil sealing and guide bearing, and then improves diving electricity The whole service life of machine.

Brief description of the drawings

Fig. 1 is structural representation of the invention；

Fig. 2 is the structural representation of sand-throwing ring of the present invention；

In figure：1- motor cases；2- motor shafts；3- end covers；4- outside framework oil seals；5- sand-throwing rings； 6- antifriction pads；7- sealing rings；8-O type sealing rings；

The upper end covers of 31-；End cover under 32-；310- setting circle steps；320- is raised；51- tri- Angular ring cavity；52- through holes.

Specific embodiment

As shown in figure 1, the present invention provides a kind of sand control installation of motor for submerged pump, including motor case 1, Motor shaft 2, end cover 3, outside framework oil seal 4 and sand-throwing ring 5, wherein sand-throwing ring 5 are set in motor shaft On 2, and positioned at the top of end cover 3.

End cover 3 includes upper end cover 31 and lower end cover 32, the inner side of upper end cover 31 A plane and a setting circle step 310 are processed, the top of outside framework oil seal 4 is fixedly mounted on positioning The sealing ring 7 positioned at outside framework oil seal top, and skeleton oil are also arranged with round platform rank 310, on motor shaft Envelope 4 is mutually sticked together with sealing ring 7.The bottom of outside framework oil seal 4 is provided with antifriction pad 6, antifriction pad 6 are located between outside framework oil seal 4 and lower end cover 32, between antifriction pad 6 and lower end cover 32 It is provided with O-ring seal 8.

The top at the edge of lower end cover 32 and the shell wall contact position sealing welding of motor case 1, and And the edge of lower end cover 32 is provided with raised 320, raised 320 and is stuck at the inwall of motor case 1； The raised brim of the bulge-structure of lower end cover is extruding bending structure, so that end cover 3 and electricity The even closer contact of machine casing 1, can bear the pressure of extraneous applying, so as to improve lower end cover 32 With the sealing tight ness rating between motor case 1, it is ensured that whole submersible motor airtight performance.

As shown in Figure 2, as the preferred embodiment of the present invention, the upper end of sand-throwing ring 5 is in oblique cone Face, the section with triangle ring cavity 51 in it, its triangle ring cavity has what can be communicated with outside to lead to Hole 52.When submersible motor works under water, motor shaft 2 drives sand-throwing ring 5 to rotate, by sand-throwing ring 5 High-speed rotation, the fine sand in water flowed to when in the triangular ring cavity 51 of sand-throwing ring 5, due to centrifugal force Effect a portion fine sand of separation is thrown out of along through hole 52, and remaining fine sand is in triangular ring Make vortex movement in chamber 51, be thrown out of again because Action of Gravity Field makes fine sand fall the bottom surface of triangular ring cavity 51 Go, so repeatedly, silt particle is thrown away the surface of motor shaft 2 and sand-throwing ring 5, and then reach anti-silt particle mill The purpose of damage.

One embodiment of the present of invention has been described in detail above, but the content is only of the invention Preferred embodiment, it is impossible to be considered as limiting practical range of the invention.It is all according to the present patent application scope The impartial change made and improvement etc., all should still belong within patent covering scope of the invention.

Claims

1. the sand control installation of motor for submerged pump, including motor case, motor shaft, end cover, skeleton Oil sealing and sand-throwing ring, the sand-throwing ring are set on motor shaft, and positioned at the top of end cover, it is special Levy and be：The end cover include upper end cover and lower end cover, the upper end cover it is interior Side processes a plane and a setting circle step, and the outside framework oil seal is fixedly mounted on setting circle step On, the bottom of the outside framework oil seal is provided with antifriction pad, and it is located between outside framework oil seal and lower end cover, The top at the edge of the lower end cover and the shell wall contact position sealing welding of motor case.

2. the sand control installation of motor for submerged pump according to claim 1, it is characterised in that：It is described The upper end of sand-throwing ring is in the section with triangle ring cavity, its triangle in scalene cone, the sand-throwing ring Shape ring cavity has the through hole that can be communicated with outside.

3. the sand control installation of motor for submerged pump according to claim 2, it is characterised in that：It is described Also be arranged with sealing ring on motor shaft, the sealing ring is located at outside framework oil seal top, and outside framework oil seal with it is close Seal ring is mutually sticked together.

4. the sand control installation of motor for submerged pump according to claim 2, it is characterised in that：It is described O-ring seal is provided between antifriction pad and lower end cover.

5. the sand control installation of motor for submerged pump according to claim 2, it is characterised in that：It is described The edge of lower end cover is provided with projection, and the projection is stuck at the inwall of the motor case.

6. the sand control installation of motor for submerged pump according to claim 5, it is characterised in that：It is described The raised brim of the bulge-structure of lower end cover is extruding bending structure.