Gear speed increasing assembly type high speed rotating casing pump unit

A rotary casing pump and assembled technology, which is applied in the direction of non-variable pumps, non-volume pumps, pumps, etc., can solve the problems of large bearing power consumption, large footprint, loose layout, etc., and achieve anti-cavitation performance Improvement, small size, and reduced deformation

CN104265639AInactive Publication Date: 2015-01-07江苏海狮泵业制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-01-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a high speed rotating casing pump unit, in particular to a rotating casing pump unit composed of a gear speed increasing assembly type high speed rotating casing pump. The pump unit comprises the gear speed increasing assembly type high speed rotating casing pump, an integrated shaft head oil pump, a coupler and a driving motor. The coupler enables the driving motor to be connected with a low speed shaft of the gear speed increasing assembly type high speed rotating casing pump. The gear speed increasing assembly type high speed rotating casing pump is composed of a stator part, a rotor part and a box body part. The stator part is composed of two rotating casing pump suction / discharging parts, a protection casing of the stator part is connected onto a location flange of the box body part, and a shaft seal part is located on the inlet side of each suction part. The rotor part is composed of a high speed shaft system and a low speed shaft system and adopts a single-oblique-tooth gear pair, each rotating casing pump rotor is directly connected with the high speed shaft, and double-side thrust discs for balancing residual axial force are arranged on two sides of the small gear tooth width direction of the high speed shaft to meet the alternating axial load work condition. The high speed rotating casing pump unit is compact in appearance, small in axial force borne by the bearing, large in pump unit flow application range and good in anti-cavitation performance.
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Description

technical field

[0001] The invention belongs to the technical field of rotary casing pumps, in particular to a gear speed-increasing assembled high-speed rotary casing pump unit, which is suitable for low-flow and ultra-high-lift working conditions in the petrochemical and oil refining fields, and is also suitable for low-flow, ultra-high-lift pumps in the nuclear power field. High stress conditions. Background technique

[0002] The root of the low efficiency of small flow and high head centrifugal pumps is that the disc friction loss of the impeller is too large. This loss is proportional to the 5th power of the impeller diameter and the 3rd power of the speed. To compare the efficiency of centrifugal pumps, a breakthrough must be made in pump theory. For this reason, the American Kobe Company proposed a brand-new idea, which combined the impeller and the pump casing to rotate synchronously, and the disk friction loss in the process of liquid gaining kinetic energy was al...

Examples

Embodiment 2

[0045] The hydrogenation feed pump of a petrochemical 1 million tons / year gasoline and diesel hydrocracking unit project is equipped with a front booster pump. Its performance parameters are flow: 67m3 / h, head: 1020m, inlet pressure 3.8MPa.G, outlet The pressure is 11.8MPa.G, the density is 800Kg / m3, the temperature is 50°C, and the NPSHa is ≤8m. The traditional rotary casing pump technology was used in engineering applications. Within 9 months of commissioning, 4 times the axial displacement vibration exceeded the standard, and one of the thrust bearings was seriously damaged. The main reason was that the axial force borne by the thrust bearing did not have enough safety margin. degree, did not meet the expected reliability.

[0046]

[0047] Comparison of the advantages of adopting this technical solution:

[0048] 1) The structure is symmetrically arranged, and the axial force is self-balanced. Compared with the existing rotary casing pump technology, the axial force ar...