阅读说明：本技术 一种强制循环铅铋泵 (Forced circulation lead-bismuth pump ) 是由 刘金灿 王道红 严红彬 张鹏 于 2020-12-16 设计创作，主要内容包括：一种强制循环铅铋泵,其特征在于：包括泵壳、导叶体、导轴承、叶轮、进水壳、泵盖、泵轴、热屏、检修密封、机械密封、刚性联轴器、电机；所述的泵壳内设置有泵轴,所述的泵轴与电机相连；所述的泵轴上从下往上依次设置有导叶体、导轴承、叶轮、进水壳与泵盖；所述的泵盖上方的泵轴上依次设置有热屏、检修密封以及机械密封。本发明导轴承采用高耐磨耐高温硬质合金,运行时采用动静压润滑,寿命5年以上；泵采用可抽芯设计,无需拆卸系统管路；泵设计检修密封,机械密封或电机故障,大大缩短维修时间。(A forced circulation lead-bismuth pump is characterized in that: the pump comprises a pump shell, a guide vane body, a guide bearing, an impeller, a water inlet shell, a pump cover, a pump shaft, a heat shield, a maintenance seal, a mechanical seal, a rigid coupling and a motor; a pump shaft is arranged in the pump shell and connected with a motor; the pump shaft is sequentially provided with a guide vane body, a guide bearing, an impeller, a water inlet shell and a pump cover from bottom to top; the pump shaft above the pump cover is sequentially provided with a heat shield, a maintenance seal and a mechanical seal. The guide bearing adopts high-wear-resistance high-temperature-resistance hard alloy, adopts dynamic and static pressure lubrication during operation, and has the service life of more than 5 years; the pump adopts a loose core design, and a system pipeline does not need to be disassembled; the pump is designed to be overhauled and sealed, mechanical seal or motor faults, and the maintenance time is greatly shortened.)

1. A forced circulation lead-bismuth pump is characterized in that: the device comprises a pump shell (1), a guide vane body (2), a guide bearing (3), an impeller (4), a water inlet shell (5), a pump cover (6), a pump shaft (7), a heat shield (8), an overhaul seal (9), a mechanical seal (10), a rigid coupling (11) and a motor (12); a pump shaft (7) is arranged in the pump shell (1), and the pump shaft (7) is connected with a motor (12); the pump shaft (7) is sequentially provided with a guide bearing (3), an impeller (4), a water inlet shell (5) and a pump cover (6) from bottom to top, a guide vane body (2) is arranged on the guide bearing (3), and the guide vane body (2) is matched with the impeller (4) for use; the pump cover is characterized in that a heat shield (8), an overhaul seal (9) and a mechanical seal (10) are sequentially arranged on the pump shaft (7) above the pump cover (6).

2. The forced circulation lead-bismuth pump as claimed in claim 1, wherein: the motor (12) is connected with the pump shaft (7) by a rigid coupling (11).

3. The forced circulation lead-bismuth pump as claimed in claim 1, wherein: the guide bearing (3) is made of high-wear-resistance high-temperature-resistance hard alloy, and dynamic and static pressure lubrication is adopted during operation.

4. The forced circulation lead-bismuth pump as claimed in claim 1, wherein: the maintenance seal (9) is provided with 4 supporting blocks for suspending the rotor part so as to maintain or replace the mechanical seal or the quick-wear part of the motor.

5. The forced circulation lead-bismuth pump as claimed in claim 1, wherein: the pump shell (1) is welded in a system pipeline.

Technical Field

The invention relates to the field of forced circulation pumps, in particular to a forced circulation lead-bismuth pump.

Background

The lead bismuth pump is commonly used in nuclear power and chemical industry and is commonly used for conveying liquid metal; therefore, the forced circulation lead-bismuth pump is used as a high-temperature pump, and has high performance requirement, thereby causing higher purchase cost; and the forced circulation lead-bismuth pump runs under the high-temperature condition for a long time, and the structure is easy to block or wear, so that maintenance is often needed, and the maintenance cost is higher. Therefore, it is necessary to provide a forced circulation pump which has a simple structure, can effectively meet the requirement of high-temperature transportation, and is convenient to maintain for solving the problems of cost and maintenance.

Disclosure of Invention

The invention aims to provide a forced circulation lead-bismuth pump, which solves the technical problems.

In order to achieve the technical purpose and achieve the technical requirements, the invention adopts the technical scheme that: a forced circulation lead-bismuth pump is characterized in that: the pump comprises a pump shell, a guide vane body, a guide bearing, an impeller, a water inlet shell, a pump cover, a pump shaft, a heat shield, a maintenance seal, a mechanical seal, a rigid coupling and a motor; a pump shaft is arranged in the pump shell and connected with a motor; the pump shaft is sequentially provided with a guide bearing, an impeller, a water inlet shell and a pump cover from bottom to top, the guide bearing is provided with a guide vane body, and the guide vane body is matched with the impeller for use; the pump shaft above the pump cover is sequentially provided with a heat shield, a maintenance seal and a mechanical seal.

As a preferred technical scheme: the motor is connected with the pump shaft by a rigid coupling.

As a preferred technical scheme: the guide bearing is made of high-wear-resistance high-temperature-resistance hard alloy, and dynamic and static pressure lubrication is adopted during operation.

As a preferred technical scheme: the maintenance seal is provided with 4 supporting blocks for suspending the rotor part so as to maintain or replace the mechanical seal or the wearing part of the motor.

As a preferred technical scheme: the pump shell is welded in a system pipeline.

The guide bearing adopts high-wear-resistance high-temperature-resistance hard alloy, adopts dynamic and static pressure lubrication during operation, and has the service life of more than 5 years; the pump adopts a loose core design, and a system pipeline does not need to be disassembled; the pump design overhauls sealedly, through overhauing sealed rotor part that suspends, shortens maintenance duration greatly when mechanical seal or motor trouble.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the support block configuration of the present invention;

in the figure: 1. a pump housing; 2. a guide blade body; 3. a guide bearing; 4. an impeller; 5. a water inlet shell; 6. a pump cover; 7. a pump shaft; 8. heat shielding; 9. overhauling and sealing; 10. mechanical sealing; 11. a rigid coupling; 12. a motor; 13. and (7) a supporting block.

Detailed Description

A forced circulation lead-bismuth pump is characterized in that: the device comprises a pump shell 1, a guide vane body 2, a guide bearing 3, an impeller 4, a water inlet shell 5, a pump cover 6, a pump shaft 7, a heat shield 8, an overhaul seal 9, a mechanical seal 10, a rigid coupling 11 and a motor 12; a pump shaft 7 is arranged in the pump shell 1, and the pump shaft 7 is connected with a motor 12; the pump shaft 7 is sequentially provided with a guide bearing 3, an impeller 4, a water inlet shell 5 and a pump cover 6 from bottom to top, the guide bearing 3 is provided with a guide vane body 2, and the guide vane body 2 is matched with the impeller 4 for use; and a heat shield 8, an overhaul seal 9 and a mechanical seal 10 are sequentially arranged on the pump shaft 7 above the pump cover 6.

The motor 12 is connected with the pump shaft 7 by a rigid coupling 11. The guide bearing 3 is made of high-wear-resistance high-temperature-resistance hard alloy, and dynamic and static pressure lubrication is adopted during operation. The maintenance seal 9 is provided with 4 supporting blocks 13 for suspending the rotor component so as to maintain or replace the mechanical seal or the wearing parts of the motor. The pump shell is welded in a system pipeline.

In the specific implementation: the pump shell is welded in the system pipeline, and the pump shell does not need to be detached from the system pipeline during maintenance, so that the pump shell is extremely convenient; the pumping type components (including the impeller, the guide vane body and the shaft) of the lead bismuth pump can be pumped out from the pump shell for maintenance; the maintenance seal is arranged below the mechanical seal. When the mechanical seal of the pump or the motor breaks down or the wearing parts are replaced, 4 supporting blocks are distributed on the maintenance seal shell and used for suspending the rotor parts so as to maintain or replace the wearing parts of the mechanical seal or the motor.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.