Hermetically sealed pump with cam anti-reverse device
A fully sealed and anti-reversal technology, which is applied to pump devices, parts of pumping devices used for elastic fluids, pumps, etc., can solve the problems of reverse rotation of fully sealed pumps, prevent reverse rotation, and solve reverse rotation of fully sealed pumps , the effect of simple structure
Active Publication Date: 2016-08-31
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0003] The purpose of the present invention is to provide a fully-sealed pump with a cam anti-reversal device, which solves the problem of reverse flow of the fully-sealed pump in the existing pipeline caused by the backflow of the circuit when the pump is stopped
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[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] Such as Figure 1~3 As shown, a hermetically sealed pump with a cam anti-reverse device includes a hermetic pump body 1 and a hermetic pump motor 2 fixed on the hermetic pump body 1, wherein the hermetic pump motor 2 includes a machine base Cylinder 3, motor stator 5, motor rotor 6, thrust plate 7 and cam 8, the base cylinder 3 of cylindrical structure is fixed on the pump body 1 of the fully sealed pump, and the motor stator 5 is fixed on the inner wall of the base cylinder 3 A motor rotor 6 is fixed outside the motor shaft 4 at the center of the base tube 3, so that the motor rotor 6 is located in the cylindrical space formed by the motor stator 5; the upper end of the motor shaft 4 is fixed with a disc-shaped thrust plate 7, and In the circumferential direction of the thrust plate 7, there are several cams 8 whose central s...
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The invention relates to the technical field of inversion prevention of fully sealed pumps and discloses a fully sealed pump with a cam anti-inversion device. In the fully sealed pump, a cylindrical barrel-shaped stand barrel is fixed on a fully sealed pump body, a motor stator is fixed on the inner wall of the stand barrel, a motor rotor is fixed at the outside of a motor shaft which is located at the center of the stand barrel so that the motor rotor is located in the cylindrical space which is formed by the motor stator, a disc-shaped thrust collar is fixed at the upper end of the motor shaft, a plurality of cams are distributed at the four sides of the thrust collar, the thrust collar is not contacted with the cams when the motor shaft rotates forwardly, and the thrust collar is contacted with the cam in extrusion mode when the motor shaft rotates reversely so that the motor shaft is prevented from reversing. The fully sealed pump with the cam anti-inversion device prevents the fully sealed pump reversing through the thrust collar and the cams, the structure is simple, and the problem of the inversion of the fully sealed pump in the existing pipeline due to the backflow in a loop under pump stopping state is effectively solved.
Description
technical field [0001] The invention relates to the technical field of reverse rotation prevention of fully sealed pumps, in particular to a fully sealed pump with a cam reverse rotation prevention device. Background technique [0002] The shaft-sealless main pump of the nuclear power plant adopts a fully sealed structure, and the entire rotating shaft is in the liquid. Due to the reverse flow of the circuit under the pump stop condition, the reverse flow of the main pump is likely to cause the main pump to reverse, and at the same time cause the flow bypass to affect the nuclear power plant. The safety and reliability of the device, the ratchet structure anti-reverse device in the air of the ordinary shaft-sealed main pump is not suitable for the fully-sealed main pump, so it is usually used to install a check valve at the outlet of the main pump without shaft seal or use electromagnetic brake way to prevent the reverse rotation of the main pump. Contents of the invention...
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IPC IPC(8): F04D13/06F04D29/00
Inventor 邓礼平杨松
Owner NUCLEAR POWER INSTITUTE OF CHINA