阅读说明：本技术 一种井用变速潜水电泵 (Variable-speed submersible electric pump for well ) 是由 王传沛 王家志 于 2020-07-01 设计创作，主要内容包括：一种井用变速潜水电泵,属于潜水泵技术领域。潜水电泵包括：潜水电机、水泵和变速器；潜水电机、变速器和水泵顺序连接为一整体。变速器两端通过紧固螺栓分别与潜水电机和水泵相连接,变速器传动轴下端连接在传动轴下轴承上,变速器传动轴的上端通过传动轴上轴承连接在变速箱体上端的轴承座内,在传动轴上轴承位置的变速箱体上连接有传动轴轴承端盖,在变速器传动轴的中间位置连接有第一传动齿轮和第二传动齿轮,第一传动齿轮和第二传动齿轮分别与电机主动齿轮和水泵轴从动齿轮啮合。优点：井用潜水泵工作时其水泵所产生轴向力由井用潜水泵部分所采用的角接触球轴承承担,减少了潜水电机工作过程的轴向力的冲击,提高了井用潜水电机使用的可靠性。(A variable-speed submersible electric pump for a well belongs to the technical field of submersible pumps. The submersible electric pump comprises: a submersible motor, a water pump and a transmission; the submersible motor, the speed changer and the water pump are sequentially connected into a whole. The two ends of the transmission are respectively connected with the submersible motor and the water pump through fastening bolts, the lower end of a transmission shaft of the transmission is connected onto a lower bearing of the transmission shaft, the upper end of the transmission shaft of the transmission is connected into a bearing seat at the upper end of a transmission box body through an upper bearing of the transmission shaft, a bearing end cover of the transmission shaft is connected onto the transmission box body at the position of the upper bearing of the transmission shaft, a first transmission gear and a second transmission gear are connected to the middle position of the transmission shaft of the transmission, and the first transmission gear and the second. The advantages are that: when the well submersible pump works, the axial force generated by the water pump is born by the angular contact ball bearing adopted by the well submersible pump part, so that the impact of the axial force in the working process of the submersible motor is reduced, and the use reliability of the well submersible motor is improved.)

1. A variable-speed submersible electric pump for a well is characterized in that: the variable speed submersible pump includes: a submersible motor, a water pump and a transmission; the submersible motor, the speed changer and the water pump are sequentially connected into a whole.

2. The variable speed submersible electric pump for wells according to claim 1, wherein: the submersible motor comprises: the motor comprises a submersible motor upper bearing seat, a transmission shaft lower bearing, a motor shaft, a submersible motor upper bearing end cover and a motor driving gear; the motor shaft penetrates through the submersible motor and is not connected with the water pump shaft; two ends of the motor shaft are connected in the bearing end covers through bearings, and the motor shaft on the inner side of the motor is sealed by a framework; the submersible motor is characterized in that a lower transmission shaft bearing is connected to an upper bearing seat of the submersible motor, the lower transmission shaft bearing is located in a gearbox body of a transmission, a motor shaft protrudes into the gearbox body of the transmission from the upper end, and a motor driving gear is connected to the protruding motor shaft.

3. The variable speed submersible electric pump for wells according to claim 1, wherein: the water pump includes: the water pump comprises a water inlet joint filter screen, a water pump shaft driven gear, a water pump shaft, a water pump lower bearing end cover, a water inlet joint, an impeller fastening taper sleeve, a pump rubber bearing and a flow guide body; the water pump shaft penetrates through the water pump and protrudes into a gearbox body of the transmission from the water inlet joint, and a water pump shaft driven gear is connected to the protruding water pump shaft; the water pump shaft at the water inlet joint is connected to the end cover of the lower bearing of the water pump through the lower bearing of the water pump; a pump rubber bearing is connected to a water pump shaft in the flow guide body, and an impeller is connected to the water pump shaft through an impeller fastening taper sleeve; the outside of the water inlet joint is wrapped with a water inlet joint filter screen.

4. The variable speed submersible electric pump for wells according to claim 1, wherein: the derailleur both ends be connected with dive motor and water pump respectively through fastening bolt, the derailleur includes: the transmission device comprises a first transmission gear, a second transmission gear, a transmission shaft upper bearing, a transmission shaft bearing end cover and a transmission case body; the lower end of a transmission shaft of the transmission is connected onto a lower bearing of the transmission shaft, the upper end of the transmission shaft of the transmission is connected into a bearing seat at the upper end of a transmission case body through an upper bearing of the transmission shaft, a bearing end cover of the transmission shaft is connected onto the transmission case body at the position of the upper bearing of the transmission shaft, a first transmission gear and a second transmission gear are connected to the middle position of the transmission shaft of the transmission, and the first transmission gear and the second transmission gear are respectively meshed with a.

Technical Field

The invention relates to the technical field of submersible pumps, in particular to a variable-speed submersible electric pump for a well.

Background

The submersible electric pump for the well comprises a submersible motor for the well and a submersible pump for the well, wherein a shaft of the submersible motor for the well and a shaft of the water pump are connected into a whole through a coupling, so that the rotating speed of the shaft of the water pump and the rotating speed of the shaft of the motor are synchronous, however, the electric pump is used in the using process, in order to increase the rotating speed of the water pump or reduce the rotating speed, only the number of pole pairs of the submersible electric pump is changed, the submersible pump is restricted from increasing the rotating speed of the water pump or reducing the rotating speed of the water pump.

Disclosure of Invention

The invention aims to provide a variable-speed submersible electric pump for a well, which solves the problem that the existing submersible pump cannot increase the rotating speed of a water pump or reduce the rotating speed of the water pump according to the use requirement.

The purpose of the invention is realized as follows: the variable speed submersible pump includes: a submersible motor, a water pump and a transmission; the submersible motor, the speed changer and the water pump are sequentially connected into a whole.

The submersible motor comprises: the motor comprises a submersible motor upper bearing seat, a transmission shaft lower bearing, a motor shaft, a submersible motor upper bearing end cover and a motor driving gear; the motor shaft penetrates through the submersible motor and is not connected with the water pump shaft; two ends of the motor shaft are connected in the bearing end covers through bearings, and the motor shaft on the inner side of the motor is sealed by a framework; the submersible motor is characterized in that a lower transmission shaft bearing is connected to an upper bearing seat of the submersible motor, the lower transmission shaft bearing is located in a gearbox body of a transmission, a motor shaft protrudes into the gearbox body of the transmission from the upper end, and a motor driving gear is connected to the protruding motor shaft.

The water pump includes: the water pump comprises a water inlet joint filter screen, a water pump shaft driven gear, a water pump shaft, a water pump lower bearing end cover, a water inlet joint, an impeller fastening taper sleeve, a pump rubber bearing and a flow guide body; the water pump shaft penetrates through the water pump and protrudes into a gearbox body of the transmission from the water inlet joint, and a water pump shaft driven gear is connected to the protruding water pump shaft; the water pump shaft at the water inlet joint is connected to the end cover of the lower bearing of the water pump through the lower bearing of the water pump; a pump rubber bearing is connected to a water pump shaft in the flow guide body, and an impeller is connected to the water pump shaft through an impeller fastening taper sleeve; the outside of the water inlet joint is wrapped with a water inlet joint filter screen.

The derailleur both ends be connected with dive motor and water pump respectively through fastening bolt, the derailleur includes: the transmission device comprises a first transmission gear, a second transmission gear, a transmission shaft upper bearing, a transmission shaft bearing end cover and a transmission case body; the lower end of a transmission shaft of the transmission is connected onto a lower bearing of the transmission shaft, the upper end of the transmission shaft of the transmission is connected into a bearing seat at the upper end of a transmission case body through an upper bearing of the transmission shaft, a bearing end cover of the transmission shaft is connected onto the transmission case body at the position of the upper bearing of the transmission shaft, a first transmission gear and a second transmission gear are connected to the middle position of the transmission shaft of the transmission, and the first transmission gear and the second transmission gear are respectively meshed with a.

The submersible motor has the beneficial effects that by adopting the scheme, the upper part and the lower part of the rotor shaft of the submersible motor for the well are respectively provided with the contact ball bearing and the angular contact ball bearing, and the bearings are respectively supported by the upper bearing seat and the lower bearing seat of the motor; the contact ball bearing and the angular contact ball bearing support and bear the axial force and the radial force generated by the operation of the motor at two ends of the motor shaft, and the motor shaft freely rotates under the support of the contact ball bearing and the angular contact ball bearing; the two ends of the contact ball bearing and the angular contact ball bearing adopt sealing structures, so that water outside the bearing chamber can enter the bearing chamber, and the sealing effect is achieved on the bearing operating environment.

The extending end of the submersible motor shaft is provided with a driving gear, and a first transmission gear meshed with the driving gear is assembled on the transmission shaft.

Two symmetrical contact ball bearings are arranged at two ends of a transmission shaft of the transmission, and the bearings are respectively arranged in bearing chambers above and below the transmission case body, so that the transmission shaft of the transmission is supported by the bearings and drives a driving gear to rotate at the extending end of a submersible motor shaft along with the rotation of the motor shaft; a first transmission gear meshed with the driving gear rotates to drive a transmission shaft of the transmission to rotate; the transmission shaft of the transmission rotates to drive a second transmission gear assembled on the transmission shaft to rotate; the second transmission gear rotates and rotates together with a water pump driven gear assembled at the shaft extension end of the water pump meshed with the second transmission gear, so that the water pump shaft is driven to rotate.

An angular contact ball bearing is arranged at the lower end of the water pump shaft, the excircle of the angular contact ball bearing is placed in a bearing chamber of a water inlet joint, and the bearing supports the water pump shaft to rotate freely; the two ends of the angular contact ball bearing chamber are sealed by adopting a framework or adopt a mechanical seal and other sealing devices to lead water at the water pump inlet to enter the bearing chamber, thereby ensuring that the bearing is not damaged by the invasion of water.

A rubber bearing support is arranged between each impeller of the water pump shaft; the rubber bearing adopts a water lubrication mode, is simple and feasible, and the rubber bearing and the angular contact ball bearing assembled at the lower part of the water pump shaft form a water pump shaft supporting body, so that the high-speed rotation of the water pump shaft is ensured.

In the speed change process, when the tooth number of the driving gear of the motor is greater than that of the first transmission gear mounted on the transmission shaft and the tooth number of the second transmission gear is less than that of the driven gear mounted at the shaft extension end of the water pump, the speed of the water pump can be increased during working, and otherwise, the speed of the water pump is reduced during working.

When the rotation speed of the motor is n1 and the rotation speed of the water pump shaft is n2, the performance of the water pump is changed to follow the following formula when the water quality and the viscosity delivered by the water pump are unchanged.

n1/n2=Q1/Q2

n1/n2=（H1/H2）²

n1/n2=（N1/N2）³

The water yield of the water pump is in direct proportion to the rotating speed, the lift is in direct proportion to the square of the rotating speed, and the power of the water pump is in direct proportion to the cube of the rotating speed.

The junction of the well submersible motor and the well submersible pump is additionally provided with a speed change gear, the rotating speed of the submersible motor is asynchronous with that of the submersible motor through gear transmission, the rotating speed is increased or reduced according to the use requirement, particularly, when a speed-increasing structure is adopted, the rotating speed of the water pump is increased, the limitation of the synchronization of the rotating speed of the water pump and the motor is removed, the performance (parameters such as flow, lift, power, efficiency and the like) of the water pump is improved, the overall dimensions of main components such as a water pump impeller and the like can be reduced through increasing the rotating speed of the water pump, and the volume and the.

The problem that the existing submersible pump cannot increase the rotating speed of the water pump or reduce the rotating speed of the water pump according to the use requirement is solved, and the purpose of the invention is achieved.

The advantages are that: compared with the prior submersible electric pump for the well, the submersible electric pump has the following advantages.

1. The submersible pump adopts a ball bearing structure to tilt and lie down the water pump.

2. When the well submersible pump works, the axial force generated by the water pump can be born by the angular contact ball bearing adopted by the well submersible pump part, and is not needed or not borne by the well submersible motor bearing, so that the impact of the axial force in the working process of the submersible motor is reduced, and the use reliability of the well submersible motor is improved.

3. By adopting the speed change structure, different gears can be selected to be meshed according to the working characteristics of the water pump, so that the required rotating speed of the water pump is achieved, and the characteristics of the water pump are changed.

Drawings

Fig. 1 is a schematic view of the structure of the variable speed submersible electric pump of the present invention.

Fig. 2 is a partial schematic view of the structure of the variable speed submersible pump of the present invention.

In the figure, 1, a submersible motor; 2. an upper bearing seat of the submersible motor; 3. a drive shaft lower bearing; 4. a first transmission gear 1; 5. a second transmission gear 2; 6. a transmission drive shaft; 7. a bearing on the transmission shaft; 8. a drive shaft bearing end cap; 9. a water inlet filter screen is saved; 10. a motor shaft; 11. an upper bearing of the submersible motor; 12. an upper bearing end cover of the submersible motor; 13. fastening a bolt; 14. a motor driving gear; 15. a transmission case; 16. a water pump shaft driven gear; 17. a water pump shaft; 18. a water pump lower bearing; 19. a water pump lower bearing end cover; 20. a water inlet joint; 21. an impeller; 22. the impeller is fastened with a taper sleeve; 23. a pump rubber bearing; 24. a flow conductor; 25. and (4) a water pump.

Detailed Description