CN218030654U - Radial guide vane type double-suction pump - Google Patents

Abstract

The utility model provides a two suction pumps of radial stator formula relates to a power plant boiler water supply system technical field. The utility model discloses an including the pump body, be provided with sunction inlet and outlet pipe on the pump body respectively, its characterized in that, this internal pressurized section of thick bamboo that is provided with of pump, pressurized section of thick bamboo includes pump barrel and pump cover, pump barrel is located the upper end of pump cover, and both ends are respectively through the kingbolt about the pump barrel with the pump cover is connected, simultaneously, the lower extreme of pump barrel pass through the metal winding pad with pump cover sealing connection, the lower extreme of pump cover is provided with the pump shaft, be provided with the double suction impeller on the pump shaft, the double suction impeller is located the below of pump barrel. The utility model discloses a radial stator formula structure, its characteristics are radial force in can be fine the offset pump operation, make the pump keep the steady state operation, and do not take place the vibration.

Description

Radial guide vane type double-suction pump

Technical Field

The utility model relates to a power plant boiler water supply system technical field especially relates to a radial stator formula double entry pump.

Background

The main water supply pump applied to the conventional island main water supply system of the nuclear power plant basically adopts a single volute casting structure, and because the pump has high flow, high rotating speed and poor radial force balance, the pump usually vibrates due to radial stress imbalance and pulse action because of casting deviation and the common cast single volute structure has poor radial force balance.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned problem, the utility model provides a radial stator formula double entry pump makes it adopt radial stator formula structure, and its characteristics are radial force in can be fine offsetting the pump operation, make the pump keep the steady state operation, and do not take place the vibration.

In order to solve the problem, the utility model provides a radial stator formula double entry pump, including the pump body, be provided with sunction inlet and outlet pipe on the pump body respectively, wherein, this internal pressurized section of thick bamboo that is provided with of pump, pressurized section of thick bamboo includes pump barrel and pump cover, pump barrel is located the upper end of pump cover, and both ends respectively through the kingbolt about the pump barrel with the pump cover is connected, simultaneously, the lower extreme of pump barrel pass through the metal winding pad with pump cover sealing connection, the lower extreme of pump cover is provided with the pump shaft, be provided with the double entry impeller on the pump shaft, the double entry impeller is located the below of pump barrel.

Preferably, the double-suction impeller further comprises a radial guide vane, and the radial guide vane is arranged above the double-suction impeller.

Preferably, the pump cover further comprises a hydraulic sealing sleeve, a gap is formed between the pump shaft and the pump cover, and the gap is sealed by the hydraulic sealing sleeve.

Preferably, the centrifugal pump further comprises a radial bearing bush, wherein the radial bearing bush comprises a first radial bearing bush and a second radial bearing bush which are arranged in parallel, the first radial bearing bush is arranged at the left end of the pump shaft, and the second radial bearing bush is arranged at the right end of the pump shaft.

Preferably, the centrifugal pump further comprises a thrust bearing, the thrust bearing is arranged at the right end of the pump shaft, and the thrust bearing is located on the right side of the second radial bearing shell.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses carry high temperature and high pressure water, adopted high strength alloy steel to forge in order to improve the security of pump, pump casing, pump cover, the double suction impeller adopts precision casting to form with radial formula stator hydraulic component, and casting precision and hydraulic efficiency all are higher than ordinary volute pump by 2-3%.

2. The utility model discloses a radial stator formula structure, its characteristics are radial force in can be fine the offset pump operation, make the pump keep the steady state operation, and do not vibrate.

3. The utility model discloses pump casing and pump cover have adopted the forging, have improved pump safety and stability operation and long life greatly.

4. The utility model discloses replace imported product, reduced the maintenance cost in purchasing cost and later stage for the user.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples, which are not intended to limit the present invention.

As shown in fig. 1, the embodiment of the present invention includes a pump body, a suction inlet and an outlet pipe are respectively disposed on the pump body, a compression cylinder is disposed in the pump body, the compression cylinder includes a pump cylinder 1 and a pump cover 4, the pump cylinder 1 is disposed at the upper end of the pump cover 4, and the left and right ends of the pump cylinder 1 are respectively connected with the pump cover 4 through main bolts 10, meanwhile, the lower end of the pump cylinder 1 is hermetically connected with the pump cover 4 through a metal winding pad 9, the lower end of the pump cover 4 is disposed with a pump shaft 5, a gap is formed between the pump shaft 5 and the pump cover 4, the gap is sealed by a hydraulic sealing pad 8, a double suction impeller 3 is disposed on the pump shaft 5, the double suction impeller 3 is disposed below the pump cylinder 1, a radial guide vane 2 is disposed above the double suction impeller 3,

in this embodiment, a radial bearing bush 6 and a thrust bearing 7 are disposed on the pump shaft 5, the radial bearing bush 6 includes a first radial bearing bush and a second radial bearing bush disposed in parallel, the first radial bearing bush is disposed at the left end of the pump shaft 5, the second radial bearing bush is disposed at the right end of the pump shaft 5, the thrust bearing 7 is disposed at the right end of the pump shaft 5, and the thrust bearing 7 is disposed at the right side of the second radial bearing bush.

In this embodiment, the flow rate of the radial guide vane type double suction pump is 2500m3/h, the lift 631m, the rotation speed: 5420r/min, the device mainly comprises a pump cylinder body 1, a radial guide vane 2, a double-suction impeller 3, a pump cover 4 and a pump shaft 5, high-temperature water enters the pump through a pump suction inlet, the fluid speed is improved through the rotating double-suction impeller 3, then the high-temperature water is converted into pressure energy by the radial guide vane 2, and then the high-temperature water is discharged from an outlet pipe.

In the embodiment, the pump mainly comprises a pump cylinder body 1 and a pump cover 4, the pump covers 4 on two sides are connected with the pump cylinder body 1 through main bolts 10, the whole pump device is tightly sealed, a metal winding pad 9 is filled between the pump cylinder body 1 and the pump covers 4 for sealing, the inside of the pressurized cylinder is filled with water during operation, a gap is reserved between the pump shaft 5 and the pump cover 4, high-temperature water inside the pump is sealed through spiral hydraulic sealing sleeves 8 on two sides, the internal water can be prevented from leaking to the outside of the pump, the non-contact hydraulic sealing sleeve 8 has very long design and service life, and continuous operation can be provided in a overhaul period without maintenance. The double-suction impeller 3 is arranged on the pump shaft 5 and is driven to rotate by an external high-speed gear box or a coupler. The pump shaft 5 is supported by radial bearing bushes 6 on both sides, and the residual axial force of the pump is balanced by a thrust bearing 7 on the non-drive side. The lubrication of the bearings is lubricated and cooled by externally supplied pressurized lubricating oil. The radial guide vane 2 is uniformly provided with 9 vanes in the circumferential direction, so that the radial force generated when the pump operates can be well balanced, and the problems of pulse and unbalanced radial force easily generated by a volute type pump are solved.

All the electrical components in the present application are connected with the power supply adapted to the electrical components through the wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and specific connection and control sequences should be obtained.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature in direct contact with the first or second feature, or the first and second features may be in indirect contact via intermediate media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

While embodiments of the present invention have been shown and described, it is to be understood that they have been presented by way of example only, and not limitation, and that changes, modifications, substitutions and alterations may be made thereto by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (5)

1. The utility model provides a radial stator formula double entry pump, includes the pump body, be provided with sunction inlet and outlet pipe on the pump body respectively, its characterized in that, this internal pressurized barrel that is provided with of pump, pressurized barrel includes pump barrel and pump cover, pump barrel is located the upper end of pump cover, and both ends pass through the kingbolt respectively about the pump barrel with the pump cover is connected, simultaneously, the lower extreme of pump barrel pass through the metal winding pad with pump cover sealing connection, the lower extreme of pump cover is provided with the pump shaft, be provided with the double entry impeller on the pump shaft, the double entry impeller is located the below of pump barrel.

2. The radial vane double suction pump of claim 1, further comprising radial vanes disposed above the double suction impeller.

3. The radial guide vane double suction pump of claim 2, further comprising a hydraulic sealing boot, wherein a gap is formed between the pump shaft and the pump cover, and the gap is sealed by the hydraulic sealing boot.

4. The radial vane double suction pump of claim 3, further comprising a radial bearing pad, the radial bearing pad comprising a first radial bearing pad and a second radial bearing pad arranged side-by-side, the first radial bearing pad disposed at a left end of the pump shaft and the second radial bearing pad disposed at a right end of the pump shaft.

5. The radial guide vane double suction pump of claim 4, further comprising a thrust bearing disposed at a right end of the pump shaft, and the thrust bearing is located to the right of the second radial bearing pad.

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