JP5656773B2 - Water removal method by oil-water separation of shaft seal device for submersible motor pump and its device - Google Patents

Description

  The present invention relates to a water removal method by oil / water separation of a shaft seal device mounted on a submersible motor pump or the like and an apparatus therefor.

  Conventionally, a shaft seal device (mechanical seal) provided between the pump portion of the submersible motor pump and the motor portion is fitted on the outer periphery of the pump shaft penetrating the oil chamber and fitted in the upper and lower annular grooves. Thus, a double-type shaft sealing device that seals the upper and lower two sealing sealing surfaces for sealing water from the pump unit side and the upper sliding sealing surface for sealing so that oil in the oil chamber does not enter the motor unit side is provided. Oil-sealed in a state that does not have a water removal function by oil-water separation.

  Then, in the oil chamber provided between the lower surface of the motor frame and the upper surface of the pump casing, the upper mating ring of the double-type shaft seal device fitted on the outer periphery of the pump shaft is fitted and supported on the lower surface of the bearing bracket. The lower mating ring is fitted and supported on the upper surface of the upper wall of the pump casing, the upper seal ring is pressed against the upper mating ring by the spring pressure of the coil spring, and the lower seal ring is pressed against the lower mating ring. Has been proposed (see Patent Document 1, for example).

  In addition, a double-type shaft sealing device is fitted on the outer periphery of the cylindrical shaft sleeve, the outer periphery is surrounded by an annular oil tank, and the cylindrical wall body is erected in the oil tank so as to surround the double-type shaft sealing device. The oil vane guide vane is fixed on the inner peripheral surface of the cylinder, and is approached to the back side of the lower end of the guide vane to open a horizontal hole for inflow of oil in the lower part of the cylindrical wall body. The upper edge of the cylindrical wall body An annular groove gap for oil spilling is formed in the portion, and a mounting unit is attached to the upper edge of the peripheral wall of the oil tank to constitute a shaft seal unit that encloses oil (for example, the following is proposed) Patent Document 1).

  However, in the configuration in which the sealing surface of the shaft seal device that does not have the water removal function by oil-water separation disclosed in Patent Document 1 slides, a completely sealed state in which the amount of leakage from the sliding surface is zero Since it is practically impossible to do so, a small amount of water intrudes into the oil chamber inevitably due to the water pressure generated on the pump unit side. Because it is mixed into the oil in the oil chamber, the viscosity of the lubricating oil on the sliding sealing surface that maintains the sealing function is reduced, and the sliding surface is rough and damaged due to poor lubrication of the sliding sealing surface. The sealing function is destroyed, and in the worst case, there is a problem that a serious accident such as an electric shock or a water vapor explosion occurs due to water immersion in the motor charging portion.

  Furthermore, a vacuum pump for evacuating the oil / water separation vacuum chamber, an oil / water supply valve for controlling the oil / water supply to the chamber, an oil discharge valve for discharging the oil after oil / water separation, and the inside of the chamber during oil discharge It is also well known to separate and collect moisture using a separate oil pressure / water separation device composed of a pressure equalizing valve that equalizes the outside air and a heater that heats the drain to promote evaporation of the water (for example, the following patents) Reference 2). However, since a separate oil / water separator must be provided, a separate installation space is required, making it impossible to reduce the size and increasing initial and running costs.

JP 2001-221190 A JP-A-11-343976

  However, in the double-type shaft seal device having an oil seal configuration that does not have the oil-water separation function of Patent Document 1, moisture is mixed into the oil chamber in a long-term use due to a slight water immersion caused by water pressure generated on the pump unit side, thereby causing a seal. The viscosity of the lubricating oil on the sliding sealing surface that maintains the function is reduced, and the sealing function is destroyed due to rough or damaged sliding surface due to poor lubrication of the sliding sealing surface, resulting in a flooding accident. Has the disadvantage of causing serious accidents such as electric shocks caused by motor charging parts and water vapor explosions.

  Moreover, in the thing which uses the oil-water separator of the said patent document 2 separately, and separates and collect | recovers | recovers water, since an oil-water separator must be provided separately, a separate installation space is required and it cannot be made compact. At the same time, the initial and running costs are increased.

  Therefore, in view of the above problems, the present invention provides a water removal function for oil / water separation in the submersible motor pump itself, without providing a separate oil / water separator for the mixing of water into the oil chamber due to long-term use of the submersible motor pump. By adding the size, the submersible motor pump can be made compact without increasing the size, the initial and running costs are not increased, and the shaft seal for the submersible motor pump can be used with existing submersible motor pumps very easily. An object of the present invention is to provide an oil-water separation method for an apparatus and an apparatus for the same.

  In the method of the invention according to claim 1 of the present invention, a double shaft seal device is provided on the outer periphery of a pump shaft that passes between an oil chamber filled with lubricating oil and is interposed between a pump portion and a motor portion of a submersible motor pump. The guide vane is fixed so that the outer surface of the cylindrical wall body is surrounded by a cylindrical wall body, and an inclined surface having an upward slope toward the rotation direction of the pump shaft is formed on the inner peripheral surface of the cylindrical wall body. The upper edge of the wall-like wall is located above the sliding surface of the upper mating ring and seal ring, and is brought close to the upper wall surface of the oil chamber to form an annular gap in the oil outflow groove. A flange that protrudes outward is attached to the lower edge of the cylindrical wall, and the lower surface of the flange is fixed to the upper surface of the locking plate for rotation prevention, and the lower side of the lower end of the guide vane on the lower part of the cylindrical wall For oil inflow that connects the oil chamber to the oil chamber A hole is opened, and a shielding ring is attached to the outside of the cylindrical wall body so that the water absorbing agent is not sucked into the oil inflow side hole, and is further disposed on the lower wall surface of the oil chamber outside the shielding ring. The main feature is that the water absorbing agent absorbs the water immersed in the oil chamber by the water absorbing agent, thereby removing the water while separating the oil and water.

  Moreover, in the apparatus of the invention according to claim 2 of the present invention, the method of the invention of claim 1 is used to place an oil chamber enclosed with lubricating oil interposed between the pump part and the motor part of the submersible motor pump. A double-type shaft seal device is fitted on the outer periphery of the penetrating pump shaft, the outer side thereof is surrounded by a cylindrical wall body, and the inner wall surface of the cylindrical wall body is inclined upward in the rotational direction of the pump shaft. The guide vane is fixed so as to form a surface, and the upper edge portion of the cylindrical wall body is brought close to the upper wall surface of the oil chamber above the sliding surface of the upper mating ring and the seal ring, and the annular shape is formed. A gap is formed in the oil outflow groove, and a flange that protrudes outward is attached to the lower edge of the cylindrical wall body, and the lower surface of the flange is fixed to the upper surface of the detent retaining plate, and is cylindrical. In the lower part of the wall body, A side hole for inflow of oil to connect with the oil chamber, and a shielding ring is attached to the outside of the cylindrical wall body so that the water absorbing agent is not sucked into the side hole for oil inflow. The water absorbing agent disposed on the lower wall surface of the room is configured to remove moisture while separating the oil and water by causing the water absorbing agent to absorb the water immersed in the oil chamber.

  Furthermore, the apparatus of the invention according to claim 3 of the present invention uses the method of the invention of claim 1 to form between the lower end surface of the housing at the lower end of the motor frame of the submersible motor pump and the upper end surface of the casing of the pump unit. A submersible motor pump shaft seal device in which lubricating oil to be detachably inserted in a space portion is provided, and is a cylindrical shaft sleeve that is removably fitted to a pump shaft that penetrates the space portion. Double type shaft seal device is fitted on the outer periphery and the outer periphery is surrounded by an oil tank, and the upper mating ring of the double type shaft seal device is fitted in the upper annular groove recessed in the lower surface of the upper lid of the oil tank, The lower mating ring of the double-type shaft seal device is fitted into the lower ring groove recessed in the upper surface of the lower wall of the oil tank, and the rotation retaining plate of the mating ring is fixed to the upper surface of the peripheral wall of the lower ring groove, Double shaft seal The guide vane is fixed on the inner peripheral surface of the cylindrical wall body standing upright in the oil tank so as to form an inclined surface having an upward slope toward the pump shaft rotation direction, and the lower edge of the cylindrical wall body A flange projecting outward is attached to fix the lower surface of the flange to the upper surface of the locking plate, and the lower side of the guide vane and the oil chamber are connected to the lower part of the cylindrical wall body. A horizontal hole for oil inflow is opened, and a flange that protrudes inward is provided with the upper edge of the cylindrical wall approaching the oil tank upper wall above the sliding surface of the upper mating ring and seal ring. An annular groove for oil outflow is formed between opposing surfaces of the upper surface of the flange and the peripheral wall lower surface of the upper annular groove, and an attachment seat for contacting the lower surface of the motor frame is attached to the upper edge of the peripheral wall of the oil tank. Horizontal for oil inflow In order to prevent the water-absorbing agent from being sucked into the cylinder, a shielding ring is attached to the outside of the cylindrical wall body, and the oil chamber is submerged by the water-absorbing agent disposed on the lower wall surface of the oil chamber outside the shielding ring. By making the water absorbent absorb water, the water is removed while separating oil and water.

  According to the present invention, the lubricating oil swirled by the rotation of the double shaft seal device fitted to the pump shaft penetrating the oil chamber in which the lubricating oil is enclosed is pumped to the inner peripheral surface of the cylindrical wall body. Lubricating oil that has flowed in through the oil inflow side hole that connects the lower end of the guide vane to the oil chamber by being lifted along the guide vane formed with an inclined surface having an upward slope toward the rotation direction The outer circumference of the cylindrical wall body is gradually discharged from the oil outflow groove in the annular gap portion that is close to the upper wall surface of the oil chamber facing the upper end surface of the flange at the upper edge of the cylindrical wall body. A water absorbing agent disposed on the lower wall surface of the oil chamber on the outer periphery of the shielding ring attached to the outside of the cylindrical wall body by gently flowing down so that air does not enter the enclosed lubricating oil. By Efficiently absorbs the water immersed in the oil chamber, which has a higher specific gravity than the lubrication oil, so that the water is removed while separating the oil and water so that the lubricating oil is stable without reducing the viscosity of the lubricating oil. Is circulated from the lower edge portion to the upper edge portion of the cylindrical wall body, so that the lubricating oil is smoothly supplied stably to the double-type shaft sealing device, so that a stable sealing function is maintained.

  Further, in Example 2 to be described later, since the water pressure generated in the pump part can easily correspond to the pressure relief structure with the space part not directly propagated to the lower part of the double shaft seal device in the oil chamber, A stable sealing function can be maintained even for a submersible motor pump using a high head.

  Furthermore, since a water absorbing agent can be easily disposed in the oil chamber of an existing submersible motor pump without using a complicated and large oil / water separator separately, the submersible motor pump can be made compact without increasing the size, The initial and running costs do not increase, and even existing submersible motor pumps can be handled very easily and can be easily replaced at the time of maintenance if the water-absorbing agent is used in a net bag or the like. Has many effects.

It is a principal part vertical side view of the oil-water separator of the shaft seal apparatus for submersible motor pumps of Example 1 of this invention. It is a principal part vertical side view of the oil-water separator of the shaft seal device for submersible motor pumps of Example 2 of the present invention. It is a principal part vertical side view of the submersible motor pump which interposed the oil-water separator of the shaft seal device for the submersible motor pump of Example 2 of this invention. It is a vertical side view of the cylindrical wall body in the oil-water separator of the shaft seal device for submersible motor pumps of Examples 1 and 2 of the present invention. It is a vertical side view of the retaining plate 16 for rotation prevention in the oil-water separator of the shaft seal device for submersible motor pumps of Examples 1 and 2 of the present invention.

  Hereinafter, a double-type shaft seal device that is interposed between the pump portion and the motor portion of the submersible motor pump of the present invention and controls a seal in an oil chamber in which lubricating oil is sealed, and the double-type shaft seal device is provided with lubricating oil. A cylindrical wall body to be circulated and a water absorbent disposed on the lower wall surface of the oil chamber outside the shielding ring efficiently absorbs water immersed in the oil chamber by the circulation of the lubricating oil. As an embodiment of the oil-water separation method of the shaft seal device for submersible motor pumps and the device having the function of removing water while separating the oil and water, the drawings are based on the examples of the present invention as follows. Details will be described with reference to FIG. Note that the present invention is not limited to the embodiment.

  In FIG. 1, 1 is a motor part of a submersible motor pump, which is interposed between the pump part 2 of the submersible motor pump and doubled on the outer periphery of a pump shaft 4 penetrating through an oil chamber 9 filled with lubricating oil 9o. The mold shaft sealing device 7 is fitted and the outside thereof is surrounded by the cylindrical wall 15, and an inclined surface having an upward slope is formed on the inner peripheral surface of the cylindrical wall 15 in the rotational direction of the pump shaft 4. An upper mating ring 11A in which the guide vane G is fixed and the upper end surface of the flange F1 projecting inwardly of the upper edge of the cylindrical wall 15 is fitted in the annular groove of the housing 18 of the motor unit 1, and the pump An annular gap is formed in the oil outflow groove 17A so as to approach the upper wall surface in the oil chamber 9 above the upper sliding surface 14A with the upper seal ring 13A fitted to the shaft 4, On the lower edge of the wall 15 A lower mating ring 11B fitted to the pump shaft 4 and a lower mating ring 11B fitted with a flange F2 projecting outward and the lower surface of the flange F2 fitted into the annular groove of the casing 2C of the pump part 2 The upper seal ring 13A is fixed by the spring pressure of the coil spring 12 fixed on the upper surface of the rotation-preventing retainer plate 16 below the lower sliding surface 14B with respect to 13B and wound up in the direction opposite to the rotational direction of the pump shaft 4. Are pressed against the upper mating ring 11A and the lower seal ring 13B is pressed against the lower mating ring 11B to form the upper and lower sliding surfaces 14A, 14B. The upper surface of the detent holding plate 16 and the cylindrical wall An oil inflow lateral hole 17B is provided in the lower part of the body 15 to connect the back of the lower end of the guide vane G and the oil chamber 9 to the oil inflow side. Since the lubricating oil 9o flowing in from 17B is raised along the guide vane G and gently flows out from the oil outlet groove 17A, the lubricating oil 9o in the oil chamber 9 is moved upward from below by the cylindrical wall body 15. Since the water-absorbing agent 21 is not sucked into the oil inflow lateral hole 17B, a plurality of through holes 20H are provided so that the water-absorbing agent 21 does not pass outside the cylindrical wall body 15. A ring 20 is additionally provided, and a water absorbent 21 such as porous and water-absorbing charcoal or silica gel disposed on the lower wall surface of the oil chamber 9 outside the shield ring 20 is circulated through the lubricating oil 9o. A method of separating the oil and water of the shaft seal device for the submersible motor pump and removing the water by causing the water absorbent 21 to efficiently absorb the water immersed in the oil chamber 9 by the action.

  In the apparatus shown in FIG. 1 using the water removal method by oil / water separation of the submersible motor pump shaft seal device, 1 is a motor section of the submersible motor pump and is interposed between the pump section 2 of the submersible motor pump. The double shaft seal device 7 is fitted on the outer periphery of the pump shaft 4 penetrating through the oil chamber 9 filled with the lubricating oil 9o, and the outside thereof is surrounded by the cylindrical wall body 15 so that the cylindrical wall body 15 The guide vane G is fixed on the inner peripheral surface of the cylinder wall 15 so as to form an inclined surface having an upward slope in the rotation direction of the pump shaft, and the upper end surface of the flange F1 projecting inwardly of the upper edge of the cylindrical wall 15 is formed. In the oil chamber 9 above the upper sliding surface 14A between the upper mating ring 11A fitted in the annular groove of the housing 18 of the motor unit 1 and the upper seal ring 13A fitted on the pump shaft 4. On the top wall An annular gap portion is formed in the oil outflow groove 17A by approaching, and a flange F2 protruding outward is attached to the lower edge portion of the cylindrical wall body 15, and the lower surface of the flange F2 is connected to the casing of the pump portion 2. Fixing to the upper surface of the detent retaining plate 16 below the lower sliding surface 14B of the lower mating ring 11B fitted in the ring groove 2C and the lower seal ring 13B fitted to the pump shaft 4 The upper seal ring 13A is pressed against the upper mating ring 11A and the lower seal ring 13B is pressed against the lower mating ring 11B by the spring pressure of the coil spring 12 wound up in the direction opposite to the rotation direction of the pump shaft 4. The upper and lower sliding surfaces 14A and 14B are formed, and the lower end of the guide vane G is formed on the upper surface of the detent retaining plate 16 and the lower portion of the cylindrical wall body 15. An oil inflow lateral hole 17B is provided to connect the back side and the oil chamber 9, and the lubricating oil 9o introduced from the oil inflow lateral hole 17B is raised along the guide vane G and gently flows out from the oil outflow groove 17A. Therefore, the lubricating oil 9o in the oil chamber 9 is circulated from the bottom to the top by the cylindrical wall 15 so that the water absorbent 21 is not sucked into the oil inflow lateral hole 17B. A shielding ring 20 having a plurality of through holes 20H is provided outside the wall body 15 so that the water absorbing agent 21 does not pass through, and a mesh bag or the like is preferably provided on the lower wall surface in the oil chamber 9 outside the shielding ring 20. The water-absorbing agent 21 disposed in the water efficiently absorbs the water submerged in the oil chamber 9 by the circulating action of the lubricating oil 9o so that the water-absorbing agent 21 absorbs the water while separating the oil and water. Configured to remove moisture removal device according to the oil-water separation of the shaft sealing device for a submersible motor pump of Example 1.

  Moreover, in the apparatus shown in FIGS. 2 and 3 using the water removal method by oil-water separation of the shaft seal device for the submersible motor pump as another embodiment, the same part product as in the first embodiment is denoted by the same reference numeral. Reference numeral 1 denotes a motor unit of the submersible motor pump, which is detachably interposed in a space 3 formed between the lower end surface of the housing 18 at the lower end of the frame 1F of the motor unit 1 and the upper end surface of the casing 2C of the pump unit 2. A submersible motor pump shaft seal device in which lubricating oil 9o is sealed in an oil tank 8, on the outer periphery of a cylindrical shaft sleeve 6 that is removably fitted to a pump shaft 4 that penetrates the space 3. The double type shaft seal device 7 is fitted and the outer periphery thereof is surrounded by the oil tank 8, and the upper mating ring 11A of the double type shaft seal device 7 is inserted into the upper annular groove 10A recessed in the lower surface of the upper cover 8A of the oil tank 8. Fit The lower mating ring 11B of the double shaft seal device 7 is fitted into the lower annular groove 10B formed in the upper surface of the lower wall 8B of the oil tank 8, and the presser plate 16 for preventing the rotation of the mating ring 11B is lowered. The upper seal ring 13A is pressed against the upper mating ring 11A by the spring pressure of the coil spring 12 fixed to the upper surface of the circumferential wall of the annular groove 10B and wound up in the direction opposite to the rotation direction of the pump shaft 4, and the lower seal ring 13B is The upper and lower sliding sealing surfaces 14A and 14B are configured to be brought into pressure contact with the lower mating ring 11B, and are pumped to the inner peripheral surface of the cylindrical wall body 15 standing in the oil tank 8 so as to surround the double shaft sealing device 7. A guide vane G is fixed so as to form an inclined surface having an upward slope in the axial rotation direction, and a furan F2 protruding outward is formed at the lower edge of the cylindrical wall body 15. The lower surface of the flange F2 is fixed to the upper surface of the locking plate 16 for rotation prevention, and the lower side of the lower end of the guide vane G and the inside of the oil tank 8 (the oil chamber 9) are provided below the cylindrical wall body 15. An oil inflow lateral hole 17B is opened, and the upper edge of the cylindrical wall 15 approaches the upper wall 8A of the oil tank 8 above the upper sliding surface 14A between the upper mating ring 11A and the upper seal ring 13A. A flange F1 projecting inwardly is provided, and an annular groove space for oil outflow 17A is formed between the opposing surfaces of the upper surface of the flange F1 and the lower peripheral wall of the upper annular groove 10A, and the upper edge of the peripheral wall of the oil tank 8 A mounting seat 19 that abuts the lower end surface of the housing 18 at the lower end of the motor frame 1F is attached to the portion of the motor frame 1F, and the lubricating oil 9o that has flowed in from the oil inflow lateral hole 17B follows the guide vane G. Since the lubricating oil 9o in the oil tank 8 is circulated from the bottom to the top by the cylindrical wall body 15, the oil inflow lateral hole is In order to prevent the water absorbing agent 21 from being sucked into 17B, a shielding ring 20 having a plurality of through holes 20H is provided outside the cylindrical wall body 15 so that the water absorbing agent 21 does not pass through. Moisture that is absorbed in the oil tank 8 (oil chamber 9) by the water-absorbing agent 21, which is preferably placed in a net bag or the like, on the upper surface of the lower wall 8B of the outer oil tank 8 by the circulating action of the lubricating oil 9o. The water removing device by oil / water separation of the shaft seal device for the submersible motor pump of Example 2 is configured to remove water while separating the oil / water by causing the water absorbent 21 to efficiently absorb water.

  Further, in the oil tank 8 detachably interposed in the space 3 formed between the lower end surface of the housing 18 at the lower end of the frame 1F of the motor unit 1 of the second embodiment and the upper end surface of the casing 2C of the pump unit 2. In the shaft seal device for the submersible motor pump in which the lubricating oil 9o is sealed, as shown in FIG. 3, the oil tank 8 is suspended from the lower end surface of the housing 18 at the lower end of the motor frame 1F by the mounting seat 19, A pressure relief structure in which the space is separated so that the water pressure generated in the pump unit 2 does not directly propagate to the lower part of the double shaft seal device 7 in the oil tank 8 can be dealt with.

DESCRIPTION OF SYMBOLS 1 Motor part 1F Frame 2 Pump part 2C Casing 3 Space part between housing lower end surface and casing upper end surface 4 Pump shaft 6 Cylindrical shaft sleeve 7 Double type shaft seal device 8 Oil tank 8A Oil tank upper cover 8B Lower wall of oil tank 9 Oil chamber 9o Lubricating oil 10A Upper ring groove 10B Lower ring groove 11A Upper mating ring 11B Lower mating ring 13A Upper seal ring 13B Lower seal ring 14A Upper sliding surface 14B Lower sliding surface 15 Cylindrical wall 16 Non-rotating Holding plate 17A Oil outflow 17B Oil inflow side hole 18 Housing 19 Mounting seat 20 Shielding ring 21 Water absorbing agent G Guide vane F1 Flange protruding inward F2 Flange protruding outward

Claims (3)

  A double-type shaft seal device is fitted on the outer periphery of the pump shaft passing through the oil chamber filled with lubricating oil, which is interposed between the pump portion of the submersible motor pump and the motor portion, and the outside is a cylindrical wall body. The guide vane is fixed so as to form an upward inclined surface in the direction of rotation of the pump shaft on the inner peripheral surface of the cylindrical wall body, and the upper edge of the cylindrical wall body is attached to the upper mating ring. An annular gap is formed in the oil outflow groove near the upper wall surface of the oil chamber above the sliding surface between the ring and the seal ring, and protrudes outward from the lower edge of the cylindrical wall. A horizontal hole for oil inflow is established in the lower part of the cylindrical wall to connect the back of the lower end of the guide vane and the oil chamber to the lower part of the cylindrical wall. From the oil inflow side hole. Since the lubricating oil is lifted along the guide vane and gently flows out of the oil outflow groove, the lubricating oil in the oil chamber is circulated from the bottom to the top by the cylindrical wall body. A shielding ring is attached to the outside of the cylindrical wall body so that the water absorbing agent is not sucked into the inflow side hole, and the water absorbing agent disposed on the lower wall surface of the oil chamber outside the shielding ring is used for the lubricating oil. Moisture removal by oil-water separation of a shaft seal device for submersible motor pumps, wherein the water-absorbing agent efficiently absorbs water immersed in the oil chamber by circulating action, thereby removing the water while separating the oil-water. Method.   A double-type shaft seal device is fitted on the outer periphery of the pump shaft passing through the oil chamber filled with lubricating oil, which is interposed between the pump portion of the submersible motor pump and the motor portion, and the outside is a cylindrical wall body. The guide vane is fixed so as to form an upward inclined surface in the direction of rotation of the pump shaft on the inner peripheral surface of the cylindrical wall body, and the upper edge of the cylindrical wall body is attached to the upper mating ring. An annular gap is formed in the oil outflow groove near the upper wall surface of the oil chamber above the sliding surface between the ring and the seal ring, and protrudes outward from the lower edge of the cylindrical wall. A horizontal hole for oil inflow is established in the lower part of the cylindrical wall to connect the back of the lower end of the guide vane and the oil chamber to the lower part of the cylindrical wall. From the oil inflow side hole. Since the lubricating oil is lifted along the guide vane and gently flows out of the oil outflow groove, the lubricating oil in the oil chamber is circulated from the bottom to the top by the cylindrical wall body. A shielding ring is attached to the outside of the cylindrical wall body so that the water absorbing agent is not sucked into the inflow side hole, and the water absorbing agent disposed on the lower wall surface of the oil chamber outside the shielding ring is used for the lubricating oil. The oil-water of the shaft seal device for an underwater motor pump is characterized in that the water absorbed in the oil chamber is efficiently absorbed by the water-absorbing agent by a circulating action so that the water is removed while separating the oil-water. Water removal device by separation.   A submersible motor pump in which lubricating oil is enclosed in an oil tank that is detachably interposed in a space formed between a housing lower end surface at the lower end of the frame of the motor unit of the submersible motor pump and an upper end surface of the casing of the pump unit. A shaft seal device for a vehicle, wherein a double shaft seal device is fitted to the outer periphery of a cylindrical shaft sleeve that is removably fitted to a pump shaft that penetrates the space, and the outer periphery is surrounded by an oil tank. The upper mating ring of the double type shaft seal device is fitted into the upper ring groove recessed in the lower surface of the upper lid of the oil tank, and the double type shaft seal device is inserted into the lower ring groove recessed in the upper surface of the lower wall of the oil tank. A cylindrical wall body that is fixedly installed on the upper surface of the peripheral wall of the lower ring groove and is installed in an oil tank so as to surround the double shaft seal device. On the inner surface of The guide vane is fixed so as to form an inclined surface with an upward slope in the direction of rotation of the pump shaft, and a flange protruding outward is attached to the lower edge of the cylindrical wall body to prevent the lower surface of the flange from rotating. A horizontal hole for inflow of oil is established in the lower part of the cylindrical wall body so as to be fixed to the upper surface of the holding plate, and the back side of the lower end of the guide vane is connected to the inside of the oil tank. A flange that protrudes inward toward the oil tank upper wall is provided above the sliding surface of the tin ring and the seal ring, and oil flows out between the opposing surfaces of the upper surface of the flange and the lower surface of the peripheral wall of the upper annular groove. An annular groove is formed, and a mounting seat that comes into contact with the lower end surface of the housing at the lower end of the motor frame is attached to the upper edge of the peripheral wall of the oil tank. Since the oil is raised along the vane and slowly flows out from the oil outflow groove, the lubricating oil in the oil tank is circulated from the bottom to the top by the cylindrical wall body. In order to prevent the agent from being sucked in, a shielding ring is attached to the outside of the cylindrical wall body, and further, the water absorbing agent disposed on the upper surface of the lower wall of the oil tank outside the shielding ring is caused by the circulating action of the lubricating oil. Moisture resulting from oil-water separation of a shaft seal device for an underwater motor pump, wherein the water-absorbing agent efficiently absorbs water immersed in the oil tank to remove the water while separating the oil-water. Removal device.

Images