CN105782109B

CN105782109B - Special pump vortex impeller for combustor

Info

Publication number: CN105782109B
Application number: CN201610123310.1A
Authority: CN
Inventors: 郭启惠; 郑石寿; 郑力豪
Original assignee: Yide Electromechanical Technology Fujian Co ltd
Current assignee: FUJIAN FUAN LEAD PUMP CO LTD
Priority date: 2016-03-06
Filing date: 2016-03-06
Publication date: 2020-05-12
Anticipated expiration: 2036-03-06
Also published as: CN105782109A

Abstract

The invention provides a vortex impeller of a special pump for a combustor, which belongs to the technical field of impellers for mechanical environment-friendly pumps and comprises an impeller for the combustor using clean fuels such as alcohol-based fuels, natural gases, biomass energy, aromatic hydrocarbon-based oils and the like, and is characterized by comprising a vortex impeller hub (1), blades (4), a sealing surface (3), a sealing groove (2), a blade R angle (7), a positioning sealing element groove hole (5), an axial pressure adjusting hole (6), a sealing partition (8) and a sealing cavity (9).

Description

Special pump vortex impeller for combustor

Technical Field

The utility model provides a special pump swirl impeller of combustor, belongs to mechanical environmental protection pump impeller, including the combustor pump technical field who uses clean fuel such as alcohol group fuel, natural gas, biomass energy, arene group oil.

Background

Because the coal burning boiler is adopted to cause air haze, organic burning substances are required to replace the traditional coal-fired heating, the fuel-fired heating device comprises a combustor using clean fuel such as alcohol-based fuel, natural gas, biomass energy and aromatic hydrocarbon oil, a special pump suitable for the combustor is urgently needed, and the problem that the existing combustor pump uses clean fuel oil and liquid delivery comprising the alcohol-based fuel, the natural gas, the biomass energy and the aromatic hydrocarbon-based oil is solved. Due to the characteristics of low viscosity, easy volatilization, easy vaporization, low density, low lubrication and the like of biomass fuel oil, the problems of cavitation, unstable pressure and the like of a pump impeller are caused, the impeller structure is designed by adopting hydraulic power suitable for the conditions, the requirement of conveying organic combustion substances is met, and the requirements of high efficiency, long-time operation, no blockage, no pollution, full combustion and heating of clean energy are extremely urgent.

1. The special pump for the combustor needs high lift and low flow, meets the requirements of stable pressure and uniform flow, can continuously convey organic combustion substances in a circulating manner, and provides high-quality pollution-free heating requirements.

2. Several impeller characteristics of existing industrial pumps: the centrifugal pump has large impeller flow and small lift and is not suitable for the centrifugal pump; the gear pump cannot deliver low viscosity and low lubrication fluid due to the sealing property; the existing vortex pump impeller cannot normally operate due to the problems that the impeller is large in flow, is structurally unsuitable for volatilizing, low in density and lubrication, easy to vaporize, high in high-pressure noise and the like of organic clean fuel oil; the vane pump vane is not suitable for low-lubrication liquid, is easy to wear, and is not suitable for conveying organic combustion substances due to the vaporization phenomenon caused by high temperature during the operation of the pump.

Disclosure of Invention

According to the defects of the prior pump impeller special for the combustor in the prior art that the impeller is suitable for clean fuel oil, the prior pump impeller special for the combustor solves the problem of meeting the requirement of conveying organic combustion substances, designs a practical and stable structure, is suitable for various combustors and combustion professional pumps adopted by matched boilers, comprises a multi-pump fluid mechanics design principle and hydraulic design suitable for characteristic media with low viscosity, easy volatilization, easy vaporization, low density, low lubrication and the like, and comprises liquid conveying, an impeller flow passage, blade arrangement and distribution, a transmission structure, high sealing performance and the like; the impeller structure is different from the common vortex pump impeller, has unique and practical arrangement combination and design principle, improves the effective cooperation between the vortex chamber runner and the impeller of the vortex pump, reduces the axial and radial losses and improves the effective working efficiency.

The special pump vortex impeller structure for the combustor accords with the characteristic of conveying organic combustion clean fuel oil, and comprises a hub (1), blades (4), a sealing surface (3), a sealing groove (2) and a pressure adjusting hole (6), wherein the hub (1) is provided with a key groove and a positioning sealing part groove hole (5), and the outer blades (4) are distributed in a plurality of ways and are characterized in that the blades are vertical to the plane of the impeller, the spacing and the number of the blades are irregularly arranged according to sin infinity angles, and the roots of the blades are provided with R angles (7); the middle part of the impeller is provided with a sealing surface (3) matched with a pump body flow channel, and the impeller is characterized in that the middle of the sealing surface (3) is provided with a sealing groove (2) which is sealed by equal parts; and pressure adjusting holes (6) are arranged between the hub (1) and the sealing surface (3), and the pressure adjusting holes are characterized in that the pressure adjusting holes are distributed in an equal distribution manner.

The special pump vortex impeller for the combustor is characterized in that a vortex impeller hub (1) is provided with: the inner circle is provided with a key groove and a positioning sealing element groove hole (5), the upper part of the pump sealing element is convexly positioned in the groove hole (5) to drive the whole set of mechanical sealing element moving ring to operate;

2. the impeller blade (4) is characterized in that a plurality of blades are arranged on the outer ring of the impeller, the circumferential surface of the impeller is provided with 3 equal parts which are regularly distributed, and the distance between the blades on the back side and the distance between the blades on the front side are staggered by 60 degrees;

3. the special pump vortex impeller for the combustor is characterized in that the impeller sealing surface comprises: the impeller sealing surface (3) is provided with 1 or 2 concentric sealing grooves (2) which are distributed along the axial sealing surface in the circumferential direction, the width of the concentric sealing grooves is 1/5 of the total width of the sealing surface (3), the circumference of the impeller sealing surface (3) is divided into 120-degree sections in three equal parts and is provided with sealing partitions (8) to form a plurality of sealing cavities (9) distributed in the circumferential direction of the impeller, and the sealing surface (3) is in clearance fit with a pump body flow channel sealing ring;

4. the special pump vortex impeller for the combustor is characterized in that the impeller pressure adjusting hole comprises: the middle part of the impeller is provided with 4 equal axial pressure adjusting holes (6) which are also driving hole positions for the rotation of the impeller and are matched with an axial driving pin to rotate along with the power.

Drawings

FIG. 1: left view of the impeller;

FIG. 2 is a drawing: a front view of the impeller;

FIG. 3: partial view of impeller blades;

the figures of the drawings illustrate:

the vortex impeller comprises a vortex impeller hub (1), a sealing groove (2), a sealing surface (3), blades (4), a positioning sealing element groove hole (5), an axial pressure adjusting hole (6), a blade R angle (7), a sealing partition (8) and a sealing cavity (9).

Detailed Description

1. The vortex impeller structure of the special pump for the combustor is specifically described by combining the special pump for the combustor, and the vortex impeller structure for the special pump for the combustor accords with the characteristic of conveying organic combustion clean fuel, and is characterized by comprising a vortex impeller hub (1), wherein the inner diameter of the vortex impeller hub is in clearance fit with a pump shaft, and an on-shaft key and an optical axis can be matched, such as: a ceramic shaft. The installation and the disassembly are convenient.

2. The impeller hub (1) is internally provided with a key groove and a positioning sealing piece groove hole (5), the upper protruding structure of the pump mechanical sealing piece is positioned in the sealing piece groove hole (5) to drive the whole set of mechanical sealing piece moving ring to operate, and the structure is simple and scientific.

3. The impeller is provided with a plurality of blades (4) on the outer circumference, and is characterized in that the outer circumference of the impeller is provided with a plurality of blades which are distributed at intervals along the circumferential direction, the blades are distributed at intervals in a sine sin infinity angle irregular arrangement, the circumference of the impeller is provided with 3 sine sin infinity blades distributed in equal areas, and the blades are designed according to the hydraulic power shown in the attached drawing, and mainly have the main functions of adjusting sine vortex formed when the vortex impeller and a pump body runner rotate in a matched mode so as to be suitable for cleaning fuel oil characteristics, be suitable for organic combustion substances with low viscosity, volatility, easy vaporization and low density, avoid the phenomenon that the circumferential vortex is formed in the same design mode as the equidistant blades so as to generate vaporization and cavitation in a low-pressure area to cause incapability of pumping liquid media, and prevent the occurrence of blockage and poor collection caused by mutual collision of continuous conveying media; in the process, each blade of the liquid medium is driven by the blade to be vertical to the plane of the impeller and has a blade R angle (7) according to a sine rule, so that organic matter clean fuel oil is reduced by reverse side effect vortexes at the inner sides of the blades, and the hydraulic efficiency of the pump is improved; in addition, the back blade interval and the front blade interval are staggered by 60 degrees, pressure flow of 6 groups of gaps is formed in a flow channel of the pump body, the low-pressure area is further ensured not to be easy to form cavitation, meanwhile, the pressure and the flow of the organic combustion substances changed by temperature can not be changed by setting the rotating speed and the blade angle, stable pressure and uniform flow are obtained, and the organic combustion substances are promoted to be fully conveyed to form combustion spray to obtain continuous and stable heat energy.

4. The impeller sealing surface (3) is characterized in that: 1 or 2 concentric sealing grooves (2) are distributed on the circumference along the axial sealing surface, the width of each concentric sealing groove is 1/5 of the total width of the sealing surface (3), the circumference of the impeller sealing surface (3) is divided into three equal parts at 120 degrees and is provided with sealing partitions (8) to form a plurality of sealing cavities (9) distributed on the circumference of the impeller, and the sealing surfaces (3) are in clearance fit with the runner sealing rings of the pump body; the design has the advantages that the sealing cavity (9) can store liquid media to play a self-lubricating role, protect the abrasion between the impeller surface and the pump body and prolong the service life; the sealing concentric sealing groove (2), the sealing partition (8) and the sealing cavity (9) store liquid media, so that the sealing performance is greatly improved, the original vortex impeller structure is improved, the lubricating effect is directly realized by conveying the media, and the abrasion and cavitation of the impeller are reduced. Meanwhile, partial noise and vibration are dispersed, and the combustor pump can continuously run for a long time and continuously supply heat.

5. Impeller middle part establish 4 equal divisions axial pressure regulation hole (6), characterized by: the axial pressure adjusting hole (6) is also a driving hole position for the rotation of the impeller, and the axial pressure adjusting hole is matched with an axial driving pin to rotate along with the power when a key groove on the shaft diameter is not arranged on the shaft, and the structure is needed if a ceramic shaft is used.

6. A combustor pump vortex impeller, simple structure, practicality are strong and the long-time incessant transport demand of organic burning matter of abundant adaptation, are fit for characteristics such as living beings fuel low viscosity, volatile, easy vaporization, low density and low lubrication, pump efficiency improves greatly. For example: compared with the common vortex pump impeller with the same size, the vortex pump impeller of the combustor pump with the diameter of 80mm has the advantages that the lift is increased by 10 meters, the flow is stable, the noise is reduced to 75 decibels from 87 decibels, the service life of the impeller is longer, the pump efficiency is improved by 3%, and the advantages are obvious. And the conveying medium is safe and reliable in the using process, low in noise, free of blockage, sufficient in combustion, balanced in pressure, free of excessive energy consumption loss in the conveying process, high in efficiency, energy-saving and environment-friendly. The structure of the coal-fired boiler meets the scientific principle of fluid mechanics design, breaks through the traditional design structure, is furthest suitable for the requirements of national coal-fired boiler reconstruction projects, can be made of new materials such as stainless steel, all copper and PEEK, and contributes to industrial upgrading, service of the nationally-designed livelihood, high efficiency, energy conservation and environmental protection.

Claims

1. The special pump vortex impeller for the combustor is characterized by comprising a vortex impeller hub (1), blades (4), a sealing surface (3), a sealing groove (2), a blade R angle (7), a positioning sealing element groove hole (5), an axial pressure adjusting hole (6), a sealing partition (8) and a sealing cavity (9); the sealing surface (3) is arranged on the end face, facing the special pump body, of the impeller hub (1), the sealing groove (2) is formed in the sealing surface (3), the positioning sealing element groove hole (5) is formed in the hole wall of the center hole of the impeller hub (1), the axial pressure adjusting hole (6) is formed in the sealing surface (3), and the sealing partition (8) is arranged in the sealing groove (2) to form a plurality of sealing cavities (9);

the impeller is characterized in that a plurality of blades (4) are arranged on the outer circle of the impeller at intervals along the circumferential direction, the distance between every two adjacent blades (4) is arranged in a sine function manner along the circumferential direction, three groups of blades (4) arranged in the sine function manner are regularly distributed on the circumferential surface of the impeller in a 3-equal division manner, and each blade (4) is provided with a blade R angle (7) on the plane vertical to the impeller; the distance between the back blades (4) and the distance between the front blades (4) are staggered by 60 degrees.

2. The special pump vortex impeller for the combustion engine as claimed in claim 1, wherein: the hole wall of the central hole of the vortex impeller hub (1) is provided with a key groove and a positioning sealing piece groove hole (5), and the upper protruding structure of the pump sealing piece is positioned in the positioning sealing piece groove hole (5) to drive the whole set of mechanical sealing piece moving ring to rotate.

3. The special pump vortex impeller for the combustion engine as claimed in claim 1, wherein: the impeller sealing surface (3) is radially provided with 1 or 2 concentric sealing grooves (2), the width of each concentric sealing groove is 1/5 of the total width of the sealing surface (3), and the sealing partitions (8) are distributed in 120-degree trisection in the circumferential direction of the impeller sealing surface (3) to form a plurality of circumferentially distributed sealing cavities (9) of the impeller.

4. The special pump vortex impeller for the combustion engine as claimed in claim 1, wherein: the number of the axial pressure adjusting holes (6) is 4, the axial pressure adjusting holes (6) are also driving hole positions for rotating the impeller and are uniformly distributed in the middle of the impeller in the circumferential direction, and the axial pressure adjusting holes are matched with the axial driving pins to rotate along with the power.