CN219242220U - Dry oil sealing slurry pump - Google Patents

Abstract

The utility model discloses a dry oil sealed slurry pump, which comprises a bracket, wherein a bearing body is arranged in the bracket, a motor shaft penetrates through the bearing body and extends out of two ends of the bracket, one end of the motor shaft is connected with a motor, the outer wall of the other end of the motor shaft is sleeved with a shaft sleeve and extends to the inner end of a pump body to be fixedly connected with an impeller, the outer wall of the shaft sleeve is provided with a filler sealing device, and the top and one side of the pump body are respectively provided with a discharge port and a suction port; the slurry pump adopts two forms of filler sealing and mechanical sealing, an oil cup is arranged in the filler sealing device, dry oil has lubricating effect and is easy to oxidize into an elastic flexible solid film, leakage is not easy to occur, an auxiliary impeller is additionally arranged in the mechanical sealing, the rotation directions of the auxiliary impeller and the impeller are opposite, the sealing effect is more superior, and the service lives of a mechanical sealing grinding block and a motor shaft are prolonged.

Description

Dry oil sealing slurry pump

Technical Field

The utility model relates to the field of slurry pumps, in particular to a dry oil sealed slurry pump.

Background

The main working components of the slurry pump are an impeller and a shell, and an impeller device in the shell is positioned on a shaft and is connected with a motor to form a whole. When the motor drives the impeller to rotate, the blades of the impeller force the slurry to rotate, namely the impeller does work on the slurry along the movement direction of the slurry, so that the pressure potential energy and the kinetic energy of the slurry are forced to be increased. The slurry flows from the center of the impeller to the outer edge, and a certain vacuum is formed in the center of the impeller, so that the slurry is continuously pressed into the impeller due to the fact that the pressure above the liquid level of the storage tank is higher than the pressure at the inlet of the pump.

The slurry is reduced in the internal peripheral speed of the overflow part, so that the pressure in the cavity is increased, external pressure flushing water is supplied into the cavity, solid particles are prevented from entering the inlet seal of the impeller and the packing seal, and further the abrasion of the sealing element is prevented, but the external pressure flushing water is too high in cost, and a small amount of flushing water is easily dropped at the positions of a water seal joint, a water seal ring and the like, so that the slurry is not applicable to occasions with high environmental requirements.

In order to prevent the vacuum damage and the interruption of water absorption caused by air leakage at the suction end, the shaft seal type of the traditional slurry pump usually adopts a packing seal, and the sealing structure is easy to cause the leakage of shaft seal water, has poor sealing effect and is inconvenient to install and replace.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a dry oil sealed slurry pump.

In order to solve the problems, the utility model provides the following technical scheme;

the utility model provides a dry oil seals sediment stuff pump, includes the bracket, the inside bearing body that is equipped with of bracket, the motor shaft passes the bearing body extends the bracket both ends, motor shaft one end is connected with the motor, and the other end outer wall cover has the axle sleeve and extends to the interior terminal fixedly connected with impeller of the pump body, the outer wall of axle sleeve is equipped with the packing sealing device, the top and the one side of the pump body are equipped with discharge port and sunction inlet respectively.

The utility model further discloses the following technology:

preferably, the packing sealing device comprises a packing box body, packing, a split packing gland, an oil cup seat, an oil cup and a water seal ring, wherein one side of the packing box body is fixedly connected to a rear guard plate, the rear guard plate is fixedly connected to one side of a pump body, the packing box body and a shaft sleeve are provided with the packing and the water seal ring therebetween, the split packing gland is tightly attached to the packing box body and sleeved on the outer wall of the shaft sleeve, the side surface of the packing box body is provided with the oil cup seat, the oil cup seat is in through connection with the water seal ring, and the oil cup is arranged inside the oil cup seat.

Preferably, a motor shaft sleeve between the stuffing box body and the rear guard plate is provided with an auxiliary impeller, and the rotation direction of the auxiliary impeller is opposite to that of the impeller.

Preferably, a first O-shaped ring and a second O-shaped ring are arranged at the joint of the two ends of the shaft sleeve and the motor shaft, and a third O-shaped ring is arranged between the auxiliary impeller and the motor shaft.

Preferably, the top of the bracket is provided with two oil cup seats and two oil cups.

The beneficial effects of adopting above technical scheme are:

1. according to the packing sealing box body of the packing sealing, the oil cup seat and the oil cup are designed, a traditional structure of an external water seal joint is replaced, the oil cup seat is externally connected with an oil gun, dry oil added from the oil cup can form an extremely thin oil film between contact surfaces of the packing and the shaft sleeve when a motor shaft rotates, the packing sealing box body has a lubricating effect, and meanwhile, the dry oil is easily oxidized and dried in air to form an elastic flexible solid film, so that leakage is not easy to cause, and the packing sealing box body is suitable for places with high environmental requirements.

2. The utility model adopts the auxiliary impeller for sealing, when the auxiliary impeller works, the auxiliary impeller rotates along with the motor shaft, the liquid in the auxiliary impeller also rotates along with the motor shaft, the rotating liquid generates an outward centrifugal force, and the centrifugal force resists the slurry flowing to the mechanical seal on one hand, so that the pressure of the mechanical seal is reduced. On the other hand, solid particles in the medium are prevented from entering the friction pair of the mechanical seal, so that the abrasion of the mechanical seal grinding block is reduced, and the service life is prolonged. The auxiliary impeller is installed in a rotating mode opposite to the rotating direction of the impeller, so that a part of axial force is counteracted, and the service life of a motor shaft is prolonged.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art:

FIG. 1 is a cross-sectional view of a dry oil sealed slurry pump

FIG. 2 is a partial enlarged view of a dry oil seal slurry pump

Wherein: a packing gland, a packing box body, an oil cup seat, an impeller with 5 pairs, a packing box body and an impeller with 5 pairs 6 first O-shaped ring, 7 shaft sleeve, 8 filler, 9 water seal ring the second O-shaped ring, the third O-shaped ring, the packing sealing device 12, the rear guard plate 13, the motor shaft 14, the bracket 15, the discharge outlet 16, the suction inlet 17 and the impeller 18.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

1-2, a dry oil sealed slurry pump comprises a bracket 15, wherein a bearing body is arranged in the bracket 15, a motor shaft 14 penetrates through the bearing body to extend out of two ends of the bracket 15, one end of the motor shaft 14 is connected with a motor (not shown in the drawing), the outer wall of the other end is sleeved with a shaft sleeve 7 and extends to the inner end of a pump body to be fixedly connected with an impeller 18, the outer wall of the shaft sleeve 7 is provided with a filler sealing device 12, and the top and one side of the pump body are respectively provided with a discharge port 16 and a suction port 17.

The packing sealing device 12 comprises a packing box body 2, a packing 8, a split packing gland 1, an oil cup seat 3, an oil cup 4 and a water seal ring 9, wherein one side of the packing box body 2 is fixedly connected to a rear guard plate 13, the rear guard plate 13 is fixedly connected to one side of a pump body, the packing 8 and the water seal ring 9 are arranged between the packing box body 2 and a shaft sleeve 7, the split packing gland 1 is tightly sleeved on the outer wall of the shaft sleeve 7, the oil cup seat 3 is arranged on the side surface of the packing box body 2, the oil cup seat 3 is in through connection with the water seal ring 9, and the oil cup 4 is arranged inside the oil cup seat 3. The dry oil added from the oil cup 4 by the packing sealing device 12 can form an extremely thin oil film between the contact surfaces of the packing 8 and the shaft sleeve 7 when the motor shaft 14 rotates, so that the packing sealing device has a lubricating effect, and meanwhile, the dry oil is easily oxidized and dried in the air to form an elastic flexible solid film, so that leakage is not easy to cause.

When the motor drives the impeller 18 to rotate, the blades of the impeller 18 force the slurry to rotate, i.e., the impeller 18 does work on the slurry in the direction of its movement, thereby forcing the pressure potential energy and kinetic energy of the slurry to increase. The slurry flows from the center of the impeller 18 to the outer edge and into the discharge port 16, creating a vacuum in the center of the impeller 18, and as the pressure above the sump level is greater than the pressure at the pump inlet, the slurry is continuously forced into the impeller through the suction port 17.

The motor shaft 14 between the stuffing box body 2 and the rear guard plate 13 is sleeved with the auxiliary impeller 5, and the rotation direction of the auxiliary impeller 5 is opposite to that of the impeller 18. The centrifugal force generated during the operation of the auxiliary impeller resists the slurry flowing to the mechanical seal on one hand, and reduces the pressure at the mechanical seal. On the other hand, solid particles in the medium are prevented from entering the friction pair of the mechanical seal, so that the abrasion of the mechanical seal grinding block is reduced, and the service life is prolonged. The auxiliary impeller is installed in a rotating mode opposite to the rotating direction of the impeller, so that a part of axial force is counteracted, and the service life of a motor shaft is prolonged.

The joint of the two ends of the shaft sleeve 7 and the motor shaft 14 is provided with a first O-shaped ring 6 and a second O-shaped ring 10, and a third O-shaped ring 11 is arranged between the auxiliary impeller and the motor shaft, so that the overall tightness of the slurry pump is improved.

Two oil cup seats and two oil cups are arranged at the top of the motor 16, glycerin is used in the oil cups, and the motor internal device is lubricated, so that friction is reduced.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a dry oil seals sediment stuff pump, includes bracket, its characterized in that: the motor shaft penetrates through the bearing bodies and extends out of two ends of the bracket, one end of the motor shaft is connected with the motor, the outer wall of the other end of the motor shaft is sleeved with a shaft sleeve and extends to the inner end of the pump body to be fixedly connected with an impeller, the outer wall of the shaft sleeve is provided with a packing sealing device, and the top and one side of the pump body are respectively provided with a discharge port and a suction port.

2. The dry oil sealed slurry pump of claim 1, wherein: the packing sealing device comprises a packing box body, packing, a split packing gland, an oil cup seat, an oil cup and a water seal ring, wherein one side of the packing box body is fixedly connected to a rear guard plate, the rear guard plate is fixedly connected to one side of a pump body, the packing box body and a shaft sleeve are provided with the packing and the water seal ring therebetween, the split packing gland is tightly attached to the packing box body and sleeved on the outer wall of the shaft sleeve, the side surface of the packing box body is provided with the oil cup seat, the oil cup seat is in through connection with the water seal ring, and the oil cup is arranged inside the oil cup seat.

3. A dry oil sealed slurry pump according to claim 2, wherein: the motor shaft sleeve between the stuffing box body and the rear guard plate is provided with an auxiliary impeller, and the rotation direction of the auxiliary impeller is opposite to that of the impeller.

4. A dry oil sealed slurry pump according to claim 3, wherein: the connection part of the two ends of the shaft sleeve and the motor shaft is provided with a first O-shaped ring and a second O-shaped ring, and a third O-shaped ring is arranged between the auxiliary impeller and the motor shaft.

5. The dry oil sealed slurry pump of claim 1, wherein: the top of the bracket is provided with two oil cup seats and two oil cups.

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