阅读说明：本技术 一种小△h的变流量离心泵叶轮装置 (Small △ H impeller device of variable-flow centrifugal pump ) 是由 曹庆年 陈万强 李祥阳 晁文雄 于 2020-04-27 设计创作，主要内容包括：本发明公开本发明公开小△H近的变流量离心泵叶轮装置,包括叶轮装置1,进口装置2,滑套装置3,限位螺母4,其中,叶轮装置1包括,轮毂11、n层前盖板12、一层后盖板13、(n+1)层叶片14,进口装置2包括,进口壳体21、限位滑杆22、滑杆支架23、滑槽24,滑套装置3包括,滑套支架31、活动滑套32,该装置可根据系统流量的需要,通过调整活动滑套位移来确定叶轮中通道的全开或者部分打开,从而达到离心泵在正常工作条件下实现不同流量调控时,保证了出口压力变化范围基本上不发生变化的情况,属于一种宽范围流量区域稳压的离心泵装置,尤其可用于流量工况变化范围较大,而对出口压力变化范围小的工作场合,同时能够预防在大流量时进口速度增加,降低进口压力,发生汽蚀,本发明采用滑套装配式结构,操作简单,稳定性能高。(The invention discloses a small △ H-near variable-flow centrifugal pump impeller device, which comprises an impeller device 1, an inlet device 2, a sliding sleeve device 3 and a limiting nut 4, wherein the impeller device 1 comprises a hub 11, n layers of front cover plates 12, one layer of rear cover plate 13 and (n +1) layers of blades 14, the inlet device 2 comprises an inlet shell 21, a limiting sliding rod 22, a sliding rod support 23 and a sliding chute 24, the sliding sleeve device 3 comprises a sliding sleeve support 31 and a movable sliding sleeve 32, and the device can determine the full opening or partial opening of a channel in an impeller by adjusting the displacement of the movable sliding sleeve according to the requirement of system flow, so that the condition that the variation range of outlet pressure is basically unchanged when the centrifugal pump realizes different flow regulation and control under normal working conditions is achieved, the centrifugal pump device belongs to a centrifugal pump device with stable pressure in a wide-range flow area, and can be particularly used in working occasions with large variation range of flow working conditions and small variation range of outlet pressure, and can prevent the inlet speed from increasing during large flow, reduce the inlet pressure and generate cavitation.)

1. The impeller device of the variable-flow centrifugal pump with the small △ H range comprises an impeller device (1), an inlet device (2), a sliding sleeve device (3) and a limiting nut (4), wherein the impeller device (1) comprises a hub (11), n layers of front cover plates (12), one layer of rear cover plate (13) and (n +1) layers of blades (14), the inlet device (2) comprises an inlet shell (21), a limiting sliding rod (22), a sliding rod support (23) and a sliding groove (24), the sliding sleeve device (3) comprises a sliding sleeve support (31) and a movable sliding sleeve (32), and the impeller device can determine the full opening or partial opening of a channel in the impeller by adjusting the displacement of the movable sliding sleeve according to the requirement of system flow, so that the condition that the change range of the outlet pressure is basically unchanged when the centrifugal pump realizes different flow regulation and control under the normal working condition is achieved, and belongs to a wide-range flow-area pressure-stable centrifugal pump device which is particularly applicable to working occasions with large flow change range and small outlet pressure change range.

2. The method of claim 1, further comprising: the limiting sliding rod (22) is fixed on the inlet shell (21) and coaxial with the impeller device (1), the inlet device (2) is provided with a sliding groove (24), the movable sliding sleeve (32) slides up and down in the sliding groove (24), and the sliding sleeve support (31) of the movable sliding sleeve (32) is coaxially arranged on the limiting sliding rod (22) and can slide up and down.

3. The method of claim 1, further comprising: the movable sliding sleeve (32) mainly functions to cut off the medium at the inlet E of the blade (14).

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a small △ H variable-flow centrifugal pump impeller device.

Background

The centrifugal pump is used as a medium conveying device, the blade width of the centrifugal pump directly influences the flow of the centrifugal pump, the blade width adjustment of the existing centrifugal pump has certain difficulty, the flow of the centrifugal pump is changed to be adjusted by adjusting the opening degree of a valve or the rotating speed of an impeller at an outlet of a pipeline, but the reduction of the opening degree of an outlet valve can cause the increase of water flow resistance, the hydraulic loss is increased, the efficiency of the centrifugal pump is reduced, the rotating speed of the impeller can also influence the lift of the water pump, the backflow type is adopted to adjust the flow to cause the backflow of high-energy media at the outlet, the energy loss is increased, the system fluctuation is increased, and aiming at the problems.

Disclosure of Invention

The invention aims to provide a variable-flow centrifugal pump impeller device with small diameter of △ H aiming at the defects in the prior art, and the impeller can still adjust the over-flow work-doing range of the impeller during the work of the centrifugal pump, thereby ensuring that the outlet pressure of the centrifugal pump does not change obviously under different flow working conditions and still keeps a reasonable interval, and being capable of better meeting the working occasions with wide flow range and stable pressure, in particular to the occasions with wide flight envelope, variable flow working conditions and small pressure fluctuation of an aircraft engine.

The centrifugal pump flow regulating device can meet the requirement that the centrifugal pump realizes different flow regulation and control under normal working conditions, is simple in structural design, convenient to operate, free of complex system connection and large in regulating range.

The movable sliding sleeve 32 is in a ring shape, the device can ensure that a channel in the impeller is fully opened or partially opened by adjusting the opening of the movable sliding sleeve 32 according to the requirement of system flow, so that when the centrifugal pump realizes different flow regulation and control under normal working conditions, the change range of outlet pressure is ensured not to be obviously changed basically, the device belongs to a wide-range flow area and pressure-stabilizing centrifugal pump device, and particularly can be used for working occasions with larger change range of flow working conditions and small change range of outlet pressure, the limiting sliding rod 22 is fixed on the inlet shell 21, the inlet shell 21 is provided with the sliding groove 24, the movable sliding sleeve 32 slides up and down in the sliding groove 24 and is coaxial with the impeller device 1, and the support of the movable sliding sleeve 32 is coaxially arranged on the sliding rod support 23 and can slide up and down.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present invention

FIG. 2 is an enlarged view of the cross-sectional view of the structure at C in FIG. 1

FIG. 3 is a sectional view of the movable sliding sleeve

FIG. 4 is an enlarged view of the cross-sectional view of the structure at D in FIG. 3

FIG. 5 is a sectional view of a multi-layer impeller structure according to the present invention

FIG. 6 is a sectional view of the inlet housing

FIG. 7 is an axial view of the inlet housing

FIG. 8 is a sectional view of the structure of the movable sliding sleeve

FIG. 9 is an axial view of the movable sleeve

In the figure, an impeller device 1, an inlet device 2, a sliding sleeve device 3, a limiting nut 4, a hub 11, a front cover plate with n layers, a rear cover plate with 13 layers, blades with 14(n +1) layers, an inlet shell 21, a limiting sliding rod 22, a sliding rod support 23, a sliding groove 24, a sliding sleeve support 31, a movable sliding sleeve 32, an impeller inlet A, an impeller outlet B, a partial enlarged view in figure 1C, a partial enlarged view in figure 3D and a blade inlet E.

Note: n =3 in the present illustration.

Detailed Description

The invention aims to provide a variable-flow centrifugal pump impeller device with small diameter of △ H aiming at the defects in the prior art, and the impeller can still adjust the over-flow work-doing range of the impeller during the work of the centrifugal pump, thereby ensuring that the outlet pressure of the centrifugal pump does not change obviously under different flow working conditions and still keeps a reasonable interval, and being capable of better meeting the working occasions with wide flow range and stable pressure, in particular to the occasions with wide flight envelope, variable flow working conditions and small pressure fluctuation of an aircraft engine.

The centrifugal pump flow regulating device can meet the requirement that the centrifugal pump realizes different flow regulation and control under normal working conditions, is simple in structural design, convenient to operate, free of complex system connection and large in regulating range.

The movable sliding sleeve 32 is in a ring shape, the device can ensure that a channel in the impeller is fully opened or partially opened by adjusting the opening of the movable sliding sleeve 32 according to the requirement of system flow, so that when the centrifugal pump realizes different flow regulation and control under normal working conditions, the change range of outlet pressure is ensured not to be obviously changed basically, the device belongs to a wide-range flow area and pressure-stabilizing centrifugal pump device, and particularly can be used for working occasions with larger change range of flow working conditions and small change range of outlet pressure, the limiting sliding rod 22 is fixed on the inlet shell 21, the inlet shell 21 is provided with the sliding groove 24, the movable sliding sleeve 32 slides up and down in the sliding groove 24 and is coaxial with the impeller device 1, and the support of the movable sliding sleeve 32 is coaxially arranged on the sliding rod support 23 and can slide up and down.