Method for preparing graphitic centrifugal pump spiral casing

A technology of centrifugal pump and pump casing, which is applied to parts, pumps, pump elements, etc. of pumping devices for elastic fluids to achieve the effect of mass production and low cost

Inactive Publication Date: 2010-08-25
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current graphite centrifugal pump casing cannot be directly processed by machining due to the dark flow channel, and proposes a method for preparing the graphite centrifugal pump casing by split processing and combined assembly, which is efficient, low consumption, and low cost. Cost, single piece and mass production of graphite centrifugal pump casings can be realized

Method used

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  • Method for preparing graphitic centrifugal pump spiral casing
  • Method for preparing graphitic centrifugal pump spiral casing
  • Method for preparing graphitic centrifugal pump spiral casing

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Embodiment Construction

[0013] The specific implementation of the present invention is described below:

[0014] 1) Select high-strength graphite material as the graphite pump casing blank, as shown in Figure 1 to Figure 4, first process the main body 1 of the pump casing, the specific method is as follows:

[0015] A Machining A light hole 4 with a diameter of φ131mm at the center of the spiral flow channel to be processed;

[0016] B Turn out a threaded hole 6 with an inner diameter of φ240mm and a depth of 30mm on the back of the blank corresponding to the light hole 4 of A; because the threaded hole 6 is larger than the maximum radius of the spiral flow channel 3, after the threaded hole 6 is processed, the spiral flow channel 3 The processing environment is open, and there is no undercurrent channel 9, so the spiral flow channel 3 can be processed by numerical control machining and general machining;

[0017] C processing inner diameter is the outlet port 8 of the vortex flow path of φ90mm.

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Abstract

The invention discloses a manufacturing method of a centrifugal graphite pump shell. The manufacturing method of a pump shell body includes that a light hole A is cut at the position of a graphite pump shell blank, on which spiral channels are intended to be processed; the back of the blank, corresponding to the light hole A, is milled with screwed holes, the inner diameter of the screwed holes is larger than the maximum radius of the spiral channel; the spiral channel and an outlet of the spiral channel are processed by numerical control or common machining method; screw filling plugs matched with the screw holes are prepared for filling the screwed holes; a light hole B communicated with the light hole A is processed at the center of the screw filling plugs. The method solves the difficult problem that direct machining can not be adopted due to hidden channels in the existing centrifugal graphite pump, has the advantages of high efficiency, low energy consumption and low cost, and can realize job production and large-scale production of the centrifugal graphite pump shell.

Description

technical field [0001] The present invention relates to the preparation of centrifugal pump volute. Background technique [0002] The pump casing of the graphite centrifugal pump casing has a volute flow channel and a section of underflow channel connected to it, and the underflow channel communicates with the outlet. Because there is a dark flow channel in the pump casing, it is impossible to insert the tool into the dark flow channel with the general machining method, so the flow channel cannot be directly processed by machining. -roasting-machining trimming"method for preparation. This manufacturing method is energy-intensive, costly and time-consuming, and is only possible in mass production. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the current graphite centrifugal pump casing cannot be directly processed by machining due to the dark flow channel, and proposes a method for preparing the graphite centrifugal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/02
Inventor 严宏志朱联邦
Owner CENT SOUTH UNIV
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