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Novel sealing ring for rotary pump and manufacturing method of novel sealing ring

A manufacturing method and sealing ring technology, which are applied to pumps, pump components, non-variable-capacity pumps, etc., can solve the problems of low pump volume efficiency, high manufacturing cost, inconvenient inspection and maintenance, etc., and achieve improved work efficiency, convenient processing, Easy installation and maintenance

Active Publication Date: 2015-08-19
杭州大路实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a new type of sealing ring for a rotary pump and its manufacturing method in order to solve the problems of large gaps, low pump volumetric efficiency, high manufacturing cost, and inconvenient maintenance and other problems in existing pumps. The characteristics are as follows:

Method used

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  • Novel sealing ring for rotary pump and manufacturing method of novel sealing ring
  • Novel sealing ring for rotary pump and manufacturing method of novel sealing ring
  • Novel sealing ring for rotary pump and manufacturing method of novel sealing ring

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Effect test

Embodiment 1

[0029] The sealing ring (1) is composed of a set of thin slices (2) whose axial thickness is much smaller than the radial width dimension.

[0030] The sealing ring (1) contains at least two and more thin slices (2).

[0031] The axial thickness of the sheet (2) is about 0.5 ~ 3mm.

[0032] The sheet (2) is composed of a fixed sheet (201) and a moving sheet (202);

[0033] The outer diameter of the stator (201) is closely connected to the installation part (301) of the pump body;

[0034] There is a gap between the inner hole of the stator (201) and the impeller seal ring (302), which is much larger than the normal seal ring gap;

[0035] The outer diameter of the moving piece (202) is 0.5 from the mounting position of the pump body (301). ~ 3mm radial clearance;

[0036] There is a smaller gap between the inner hole of the moving piece (202) and the impeller seal ring (302) than the normal seal ring gap;

[0037] The moving piece (202) can move radially between two adja...

Embodiment 2

[0046] The sealing ring in the conventional pump body is characterized as an integral type, and changed into a split combination type, more specifically, it is composed of a group of thin slices (0.5 ~ 3mm), the slices in this new type of seal ring are composed of a fixed piece that fits closely with the installation part of the pump body and a moving piece that has a certain radial gap with the installation part. Among them, the feature of the fixed plate is that there is a large gap between the inner hole and the impeller seal ring, which is far beyond the normal seal ring gap, and the outer diameter is precisely matched with the installation part of the pump body; the feature of the moving plate is that there is a ratio between the inner hole and the impeller seal ring. The clearance of the normal sealing ring is smaller, and the outer diameter of the stator (201) is closely connected to the installation part of the pump body (301) and there is a larger gap between the outer...

Embodiment 3

[0048] During assembly, rely on the fixed piece to initially press against the moving piece, but it can slide radially; when the pump is running, rely on the pressure difference between the inlet and outlet of the impeller to form a pressure difference between the two ends of the sealing ring, and further compress the sealing piece toward the impeller inlet. , Therefore, when the actual pump is running, the moving plate is stationary. Because the moving piece can slide in the radial direction, in the case of a large concentricity deviation between the housing part and the rotor part caused by various factors, the moving piece can still be moved by the rotor during assembly or in operation to move the moving piece slide radially to a new position, such as Figure 4As shown, a gap is formed with the impeller seal ring at the new position, so that the impeller seal ring and the pump body seal ring will not be stuck or seized. Because of its self-adaptive floating characteristics...

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Abstract

The invention discloses a novel sealing ring for a rotary pump and a manufacturing method of the novel sealing ring. The sealing ring is composed of a set of sheets (2), wherein the axial thickness of the sheets (2) is much smaller than the radial width of the sheets (2). The sealing ring (1) at least comprises two or more sheets (2). The novel sealing ring has the beneficial effects that a sealing clearance of the pump is reduced, and a labyrinth sealing structure is additionally arranged, so that the interior leakage flow is greatly reduced, the working efficiency is improved, and the obvious energy-saving effect is achieved; due to the sheet-type shape, operation is easy, and mounting and maintenance are convenient; and machining is convenient, sheet stamping and integrated blanking can be adopted, materials are fully utilized, and the cost is low.

Description

technical field [0001] The invention discloses a novel sealing ring for a rotary pump and a manufacturing method thereof, in particular to a novel sealing ring of a gap-type labyrinth seal. It belongs to the technical field of physical machinery. Background technique [0002] Traditional rotary pumps, such as vane centrifugal pumps and mixed flow pumps, rely on rotational kinetic energy to change the low-pressure liquid at the impeller inlet into high-pressure liquid. In order to prevent the backflow of the conveying medium between the inlet and the outlet of the impeller, a sealing ring with a small radial annular gap is installed to increase the backflow resistance and reduce the backflow to achieve a certain pumping efficiency. The smaller the gap, the greater the backflow resistance, the smaller the leakage, the higher the volumetric efficiency of the pump, and the higher the efficiency of the pump. Therefore, the gap size of the seal ring directly affects the efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/08F04D29/02
Inventor 杨建青薛宽荣
Owner 杭州大路实业有限公司
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