CN211900995U - Mixed flow pump - Google Patents

Abstract

The utility model provides a mixed flow pump, mixed flow pump are including the axle of the motor of connecting the mixed flow pump and the pump body, and the axle has and is used for cooperating the end with motor matched with motor and is used for cooperating the end with pump body matched with pump, and the preferred 2 dishes of installing are used for being connected the end bearing with motor matched with motor on motor cooperation end, and the preferred 2 dishes of installing are used for being connected the end bearing with mixed flow pump's impeller matched with pump on pump cooperation end. Through reforming transform current mixed flow pump structure, reduce the damage frequency of equipment, improve the work efficiency of mixed flow pump, reduce the maintenance frequency of equipment and the expense of equipment maintenance simultaneously to reduction in production cost.

Description

Mixed flow pump

Technical Field

The utility model relates to a mixed flow pump, in particular to mixed flow pump of extraction brine.

Background

China's potassium resources exist in remote areas such as Qinghai, wherein the reserves of Qinghai account for more than 50% of the reserves of China, the Carlo salt lake mainly adopts chloride type salt lake, and production enterprises in mining areas adopt mining underground intercrystalline brine and interstitial brine as main raw materials to carry out production operation. The brine extraction equipment used in the salt pan of the Carlo sweat area at present is mainly a mixed flow pump which has the characteristics of large flow, low lift and high efficiency.

However, experience of years of use and accumulation in the process of extracting brine shows that the maintenance frequency of the mixed flow pump gradually increases under the condition that the lift of the used mixed flow pump is increased, specifically: the mixed-flow pump used at present does not have the yarn problem basically when pumping water normally, but when the impeller of the mixed-flow pump is slightly mineralized, because the axial force has a reaction force in the pumping process, the impeller is pushed by the reaction force when pumping water through rotation, the impeller can move towards the water inlet direction in the axial direction, when the impeller rotates slightly unbalanced after mineralized, the radial force of the bearing is greatly increased, the side of the shaft close to the pump (particularly the side of the impeller close to the mixed-flow pump) is only connected with the end bearing by using the 1 disc pump, when the bearing capacity of the pump connection end bearing reaches the upper limit, the bearing capacity is larger than the bearing range, and then the mixed-flow pump can not work normally.

Through the description, the structural design of the connecting shaft of the mixed flow pump at present does not consider the axial force and the radial force of the bearing at the connecting end of the pump, so that the problem that the bearing is broken frequently when the bearing at the connecting end of the mixed flow pump, which is close to the pump side (particularly close to the impeller side of the mixed flow pump), is used in the using process of the mixed flow pump, the bearing at the end of the motor, which is close to the motor side, is almost not damaged, the annual maintenance frequency of each pump is averagely more than 3 times, and the damaged bearing at each time is the bearing at the connecting end of the pump, so that the maintenance cost of the equipment is continuously increased, the working efficiency of the equipment is reduced.

For the above reasons, workers have made technical modifications to the equipment to avoid frequent damage to the equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mixed flow pump to overcome the drawback that the bearing damage frequency of current mixed flow pump is high, through reforming transform current mixed flow pump structure, reduce the damage frequency of equipment, improve the work efficiency of mixed flow pump, reduce the maintenance frequency of equipment and the expense of equipment maintenance simultaneously, with reduction in production cost.

In order to achieve the above object, the present invention provides a mixed flow pump, including a shaft connecting a motor of the mixed flow pump and a pump body, the shaft having a motor mating end for mating with the motor and a pump mating end for mating with the pump body, characterized in that the motor mating end is provided with a motor connecting end bearing for mating with the motor, and the pump mating end is provided with at least 2 discs of pump connecting end bearings for mating with an impeller of the mixed flow pump.

By adopting the scheme, the pump connecting end bearing matched with the impeller of the mixed flow pump is added on the pump matching end, so that the stress range of the bearing can be enlarged, the bearing capacity of the bearing can be met by the axial force and the radial force generated when a small amount of salt is precipitated on the impeller and the salt precipitation is uneven, and the damage degree of the bearing can be greatly reduced.

Preferably, a 2-disc pump connection end bearing is preferably mounted on the pump mating end.

By adopting the scheme, the stress range of the bearing can be enlarged, the bearing capacity of the bearing can be met by the axial force and the radial force generated when the impeller is slightly salted and the salted is uneven, and the damage degree of the bearing can be greatly reduced.

Preferably, at least 2 discs of motor connecting end bearings matched with the motor are arranged on the motor matching end.

By adopting the scheme, the problem that the bearing at the connecting end of the motor is easy to break due to overlarge axial and radial force generated when the motor rotates at high speed is mainly considered, and the bearing capacity of a single bearing can be reduced by adopting at least 2 disc bearings at the connecting end of the motor, so that the service life of the bearing is prolonged.

Preferably, a 2-disk motor connecting end bearing is preferably mounted on the motor matching end.

By adopting the scheme, the problem that the bearing at the motor connecting end is easy to break due to overlarge axial and radial force generated when the motor rotates at a high speed is mainly considered, and the bearing capacity of a single bearing can be reduced by adopting the 2-disk motor connecting end bearing, so that the service life of the bearing is prolonged.

Preferably, an oil tank for containing lubricating oil, which is provided in the axial direction of the shaft, is fitted to the radially outer side of the shaft.

By adopting the scheme, the oil tank is arranged, so that lubricating oil can be supplied to the mixed flow pump, and the running stability of the mixed flow pump is ensured.

Preferably, the motor end cover is arranged on the motor matching end and positioned on the axial outer side of the shaft, the pump end cover is arranged on the pump matching end and positioned on the axial outer side of the shaft, an oil tank shell is sleeved on the radial outer side of the shaft and arranged along the axial direction of the shaft, and the oil tank is formed by enclosing the motor end cover, the oil tank shell, the pump end cover and the shaft together.

Preferably, the oil tank further comprises a constant-level oil cup for controlling the oil level of the oil tank.

With this arrangement, the oil level in the oil tank can be effectively controlled to ensure that the supply of the lubricating oil in the oil tank is normal.

To sum up, the utility model discloses in, through the pump cooperation is served and is increased the pump connection end bearing with the impeller matched with of mixed flow pump, can increase the atress scope of bearing, and the bearing capacity of bearing also can be satisfied to axial force and the radial force that produces when the impeller is a small amount of salt deposition and salt deposition are inhomogeneous, and the damage degree that can greatly reduced bearing not only can improve the work efficiency of mixed flow pump, still reduces the maintenance frequency simultaneously, greatly reduced staff's intensity of labour, and then reduction in production cost.

Drawings

Fig. 1 is a schematic view of a shaft connecting assembly of the mixed flow pump of the present invention.

Detailed Description

The mixed flow pump of the present invention will be described in detail with reference to fig. 1. It is particularly emphasized that the following description only describes the subject matter of the present invention, and the basic structure of the mixed-flow pump (for example, the mixed-flow pump mainly comprises a pump body, a pump cover, an impeller, a pump shaft, a bearing body, a shaft seal device, etc.) can adopt the structure disclosed in the prior art, and will not be described herein again.

As shown in fig. 1, the mixed flow pump according to the present embodiment includes a shaft 100, the shaft 100 has a motor coupling end 200 coupled to a motor of the mixed flow pump and a pump coupling end 900 coupled to a pump body of the mixed flow pump, a 2-disc motor connecting end bearing 400 coupled to the motor of the mixed flow pump is mounted on the motor coupling end 200, and a 2-disc pump connecting end bearing 700 coupled to an impeller of the mixed flow pump is mounted on the pump coupling end 900.

A motor end cap 300 positioned on the axial outer side of the shaft 100 is mounted on the motor mating end 200, a pump end cap 800 positioned on the axial outer side of the shaft 100 is mounted on the pump mating end 900, an oil tank housing 500 arranged along the axial direction of the shaft 100 is sleeved on the radial outer side of the shaft 100, an oil tank 600 is enclosed by the motor end cap 300, the oil tank housing 500, the pump end cap 800 and the shaft 100, and the oil tank 600 is used for containing lubricating oil. In addition, a constant level oil cup (not shown in fig. 1) is provided for the oil tank 600, and the constant level oil cup is used for controlling the oil level of the oil tank 600.

When the mixed flow pump operates, the rotating direction of the mixed flow pump is clockwise when seen from the driving end. When the pump body rotates at a high speed under the driving of the motor, the pump connecting end bearing 700 on the shaft 100 generates certain axial force and radial force to stress the pump connecting end bearing, and when the impeller of the mixed flow pump is not salt-precipitated or is little salt-precipitated, the pump connecting end bearing 700 works normally because the generated axial force and radial force meet the bearing capacity range of the pump connecting end bearing 700; when the salt deposition of the impeller is high or the salt deposition of the impeller is not uniform, the axial force and the radial force applied to the pump connection end bearing 700 are increased, and the pump body vibrates greatly, so that the pump connection end bearing 700 (only in the case of mounting 1 disc) is easy to damage. The utility model discloses an increase on pump cooperation end 900 with mixed flow pump's impeller matched with pump connection end bearing 700, can increase the atress scope of bearing, the bearing capacity of bearing also can be satisfied to axial force and the radial force that produces when the impeller is a small amount of salt deposition and salt deposition are inhomogeneous, the damage degree that can greatly reduced bearing not only can improve mixed flow pump's work efficiency, still reduce the maintenance frequency simultaneously, greatly reduced staff's intensity of labour, and then reduction in production cost.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

For example, in the above embodiment, pump connection end bearing 700 is 2 disks, but is not limited thereto, and 3 disks, 4 disks, or more disk pump connection end bearings 700 may be mounted on pump mating end 900.

The purpose of the present invention is to increase the number of disks (at least 2 disks) of pump connecting end bearing 700 on pump mating end 900, rather than to limit the number of disks of motor connecting end bearing 400. In the above embodiment, the motor connecting end bearing 400 is 2 disks, but it is not limited thereto, and it is understood that the motor connecting end bearing 400 at least 2 disks of which are matched with the motor of the mixed flow pump may be installed on the motor mating end 200.

Claims (7)

1. A mixed flow pump comprising a shaft (100) connecting a motor and a pump body of the mixed flow pump, said shaft (100) having a motor mating end (200) for mating with said motor and a pump mating end (900) for mating with said pump body, characterized in that,

a motor connecting end bearing (400) matched with the motor is arranged on the motor matching end (200),

and the pump matching end (900) is provided with at least 2 discs of pump connecting end bearings (700) matched with the impeller of the mixed flow pump.

2. A mixed flow pump according to claim 1, wherein a 2-disc pump connection end bearing (700) is mounted on the pump mating end (900).

3. A mixed flow pump according to claim 1, wherein at least 2 discs of a motor connection end bearing (400) for cooperation with the motor are mounted on the motor mating end (200).

4. A mixed flow pump according to claim 1, wherein a 2-disc motor connection end bearing (400) is mounted on the motor mating end (200).

5. A mixed flow pump according to claim 1, wherein an oil tank (600) for containing lubricating oil, which is provided in the axial direction of the shaft (100), is fitted over a radially outer side of the shaft (100).

6. A mixed flow pump according to claim 5, wherein a motor end cap (300) is mounted on the motor mating end (200) axially outside the shaft (100),

a pump end cover (800) positioned on the axial outer side of the shaft (100) is mounted on the pump mating end (900),

an oil tank shell (500) arranged along the axial direction of the shaft (100) is sleeved on the radial outer side of the shaft (100),

the oil tank (600) is defined by the motor end cover (300), the oil tank shell (500), the pump end cover (800) and the shaft (100) together.

7. A mixed flow pump according to claim 5, further comprising a constant level oil cup for controlling the oil level of the oil tank (600).

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