Self-cooling circulation axial force carrying device for horizontal pump

Abstract

The invention discloses a self-cooling circulation axial force carrying device for a horizontal pump. The self-cooling circulation axial force carrying device for the horizontal pump comprises a transmission shaft connected with a pump shaft. The transmission shaft is sequentially sleeved with a connecting piece, a thrust bearing unit and a tail end cover from left to right. The thrust bearing unit sequentially comprises a front bearing seat, a front bearing, a sliding block, a thrust bearing sector block, a thrust bearing bracket and a rear bearing seat from left to right, wherein the front bearing is matched with the front bearing seat. A curved surface circular truncated cone is arranged at the right end of the thrust bearing bracket. The left end face of the rear bearing seat is provided with a concave face matched with the curved surface circular truncated cone. A lubricating sleeve and a cooling sleeve are sequentially and fixedly connected between the front bearing seat and the rear bearing seat from inside to outside in the radial direction and a lubricating containing cavity and a cooling containing cavity are sequentially formed from inside to outside. Cooling liquid circulates between the cooling containing cavity and an inlet flange. According to the self-cooling circulation axial force carrying device for the horizontal pump, axial force can be borne, self-cooling circulation between the cooling containing cavity and a pump body is achieved, the service life of the carrying device is prolonged, and the use range of the carrying device is widened.

Description

technical field [0001] The invention relates to a pump, in particular to a self-cooling cycle axial force bearing device for a horizontal pump. Background technique [0002] Pumps are widely used in various fields of industry and agriculture, and play an important role in the development of the national economy. At present, horizontal multistage centrifugal high-pressure water injection pumps are used in fields such as long-distance water supply in oilfields and downhole pressurized water injection. During the operation of the pump, there is usually an axial force acting on the pump shaft, which pulls the rotor to move axially. Therefore, it is necessary to try to balance or eliminate the axial force to make the pump work normally. At present, there are many types of balancing devices commonly used on pumps, such as balancing drums, balancing discs, and balancing holes. For multi-stage high-pressure pumps, the total axial force in the pump is relatively large, so the probl...

AI Technical Summary

Problems solved by technology

At present, there are six commonly used methods for balancing the axial force: 1. The impellers are arranged back to back for balance; the pump using this method has a complex structure and high manufacturing costs; 2. A balance chamber is installed on the back of the impeller; this method balances the axial force incompletely. There are residues, and the use of multi-stage pumps will cause excessive cumulative residual axial force; 3. Add a balance drum after the last impeller; this method balances the axial force incompletely, and it will cause cumulative residual axial force when used in multi-stage pumps. The residual axial force is too large; 4. The rear cover plate of the last stage impeller is equipped with a balance plate; this method has high requirements for the design of the balance plate, and different balance plates need to be used in different pumps; Combined device of balance drum, balance disc, and balance ring; the design and installation are complicated and the reliability is low; 6. A stabilized pump is added; the axial force of this method is mainly carried by the bearing in the motor, and the damage rate of the stabilized pump is high. Unit reliability is poor

In the above six methods of balancing axial force, there are various problems such as complicated manufacture, difficult maintenance, low reliability, poor axial force balance effect, high heat release, and high manufacturing and installation costs.

The combination of rolling bearings and sliding bearings is used inside the traditional carrier to bear the axial force. During the operation, there are problems such as high heat release, short life, low bearing capacity of axial force and radial force, and inability to carry out secondary maintenance.

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