CN110439782B - Air release shield of industrial gas compressor - Google Patents

Air release shield of industrial gas compressor Download PDF

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Publication number
CN110439782B
CN110439782B CN201910707823.0A CN201910707823A CN110439782B CN 110439782 B CN110439782 B CN 110439782B CN 201910707823 A CN201910707823 A CN 201910707823A CN 110439782 B CN110439782 B CN 110439782B
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China
Prior art keywords
protective cover
gas compressor
guide body
industrial gas
shield
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CN201910707823.0A
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CN110439782A (en
Inventor
袁博
李付俊
闫云龙
孙标
郑建峰
张长弓
付朋飞
张丛磊
刘元浩
张玉峰
冀永刚
李新春
严伟博
强科
施欢
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Xian Shaangu Power Co Ltd
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Xian Shaangu Power Co Ltd
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Priority to CN201910707823.0A priority Critical patent/CN110439782B/en
Publication of CN110439782A publication Critical patent/CN110439782A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027Pulsation and noise damping means
    • F04B39/0033Pulsation and noise damping means with encapsulations
    • F04B39/0038Pulsation and noise damping means with encapsulations of inlet or outlet channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123Fluid connections

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides an industrial gas compressor ventilation shield, which comprises two types of components: one is a cone wind-discharging noise-reducing rain-proof shield, and the other is a straight triangular prism wind-discharging noise-reducing rain-proof shield. The cone wind-discharging, noise-eliminating, noise-reducing and rain-proof shield consists of a cone shield, a cone diversion device and a connecting rod; the straight triangular prism wind-discharging, noise-eliminating and noise-reducing rainproof shield consists of a straight triangular prism protective cover, a straight triangular prism flow guiding device and a connecting rod. In the pressurization and ventilation debugging of the anti-surge valve (such as the blow-off valve) of the compressor, the compressed air at the outlet of the blow-off pipe can be uniformly and effectively diffused into the atmosphere, the protective cover can prevent dust and rain and snow, and can prevent the effect of damaging the protective cover due to excessive accumulated water and snow, and the guide body can effectively reduce noise values, so that the overall stability of the device can be ensured.

Description

Air release shield of industrial gas compressor
Technical Field
The invention relates to an industrial gas compressor, in particular to a discharge shield of the industrial gas compressor.
Background
Before the main air supply, the industrial air compressor needs to carry out single-body linkage test run and blow off treatment through a blow-off pipeline. When the outlet pressure and flow of the compressor reach the design working condition or exceed 5% -10% of the rated working condition, the wind pressure and noise of the outlet of the air discharge pipeline are maximum. In order to prevent the accumulated water or other sundries in the pipeline from falling into the air release pipeline, the flat plate shield is welded above and is welded by the pull rod in the traditional method, but when the air release pressure of the compressor reaches the rated pressure or overload pressure, the flat plate shield is noisy due to uneven air flow at the outlet, and the flat plate shield is stressed too much locally to cause falling and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the air release shield of the industrial gas compressor, which solves the technical defects of simple structure and poor noise elimination and noise reduction effect of the air release shield used at present.
In order to solve the technical problems, the invention adopts the following technical scheme:
an industrial gas compressor discharge shield comprises a shield, a guide body and a connecting rod;
the protective cover is used for preventing sundries from entering the air release pipeline of the industrial gas compressor and is connected with the diversion body;
the guide body is used for guiding the air flow at the outlet of the air discharge pipeline of the industrial gas compressor, and is positioned below the protective cover;
the connecting rod connects the protective cover and the guide body with the outlet of the air release pipeline of the industrial gas compressor;
the protective cover and the guide body are of polyhedron structures, the longitudinal sections of the protective cover and the guide body are of triangle structures, and the joint of one end of the protective cover and one end of the guide body is in surface contact;
the cross section area of the protective cover gradually decreases from the contact position of the protective cover and the guide body to one end of the protective cover, which is far away from the outlet of the air discharge pipeline of the industrial gas compressor;
the cross section area of the guide body gradually decreases from the contact position of the protective cover and the guide body to one end of the guide body, which is close to the outlet of the air discharge pipeline of the industrial gas compressor.
As an implementation mode, the air discharging circular tube is used for discharging air, the protective cover and the guide body are of conical structures, the bottom surface of the protective cover is connected with the bottom surface of the guide body, and the diameter of the bottom surface of the protective cover is the same as that of the bottom surface of the guide body.
Specifically, the height of the protective cover cone is lower than that of the guide body cone, and the diameter of the bottom surface of the protective cover cone or the guide body cone is not smaller than that of an air discharge pipeline of the industrial gas compressor.
More specifically, the protective cover and the guide body are processed into an integrated structure along one circle of the bottom surface circle, and are connected with the outlet of the air release pipeline of the industrial gas compressor through the connecting rod, and the air flow at the outlet of the air release pipeline of the industrial gas compressor is discharged from the periphery of the guide body.
The structure of the air release shield of the industrial gas compressor meets the following conditions:
wherein: h is a 2 Is high in the protective cover; h is a 1 Is the height of the current carrier; r is the radius of the bottom surface of the protective cover or the cone of the diversion body; r is the radius of the air release pipeline; alpha represents the included angle between the bus and the bottom surface of the protective cover; θ represents a bus of the current carrierThe bottom surface included angle; l (L) 1 Is the minimum distance of the ventilation; h represents the height of the bottom surface of the shield or the cone of the deflector from the outlet of the air release pipeline.
As another implementation mode, the air discharge square tube is used for discharging air, the protective cover and the guide body are of isosceles right triangular prism structures, the side faces of the protective cover and the guide body are overlapped and connected, and the side faces are the side faces of the isosceles right triangular prism, where the bottom faces of the isosceles right triangular prism are not isosceles sides.
Specifically, the height of the bottom surface of the protective cover is lower than that of the bottom surface of the guide body, and the area of the side surface of the protective cover, which is equal to or more than that of the outlet of the air discharge pipeline of the industrial gas compressor, is equal to or more than that of the isosceles right triangular prism of the protective cover.
More specifically, the protective cover and the guide body are processed into an integrated structure along a circle of the overlapped side surfaces, and are connected with the outlet of the air discharge pipeline of the industrial gas compressor through the connecting rod, and the air flow at the outlet of the air discharge pipeline of the industrial gas compressor is discharged from the side surface of the guide body.
The structure of the air release shield of the industrial gas compressor meets the following conditions:
wherein: h is a 2 Is isosceles triangle-shaped high on the bottom surface of the protective cover; h is a 1 Is isosceles triangle-shaped high on the bottom surface of the diversion body; l is half of the bottom side of an isosceles triangle on the bottom surface of the protective cover or the diversion body; alpha represents an included angle between the bottom side of the isosceles triangle on the bottom surface of the protective cover and the waist; θ represents the included angle between the bottom side of the isosceles triangle on the bottom surface of the flow guiding body and the waist; l (L) 2 Representing the minimum distance of the blow-off; l represents half of the side length of the air release pipeline; h represents the height of the plane where the contact surface of the protective cover or the guide body is located from the outlet of the air release pipeline.
The number of the connecting rods is 2-20, and the number of the connecting rods is even, preferably 4 or 8.
Compared with the prior art, the invention has the following technical effects:
the invention relates to an air release shield of an industrial gas compressor, which solves the problem of high noise caused by air release and ingeniously utilizes the flow guiding principle of air flow to obtain low-noise air flow. Meanwhile, the area of the air outlet can be flexibly adjusted according to the size of the air outlet.
The air release shield of the industrial gas compressor can uniformly put the air into the air, reduce the blockage of the traditional shield to the air flow, prevent the shield from falling off due to overlarge air flow and ensure the overall stability of the device. The protective cover provided by the invention can prevent dust, rain and snow and prevent excessive accumulated water and snow from damaging the protective cover. In the case of continuous maximum pressure discharge at the compressor outlet, the dangerous situation of conventional shroud shedding occurs in many consumer sites. The device can effectively avoid the situation.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2a is a schematic view of a three-dimensional structure of a cone shield or baffle according to the present invention; b is a three-dimensional structure schematic diagram of the isosceles right triangular prism protective cover or the guide body;
FIG. 3 is a dimensional map of the cone shield of the present invention;
FIG. 4 is a drawing of the dimension of the right triangular prism protective cover of the present invention;
fig. 5 is an exploded view of the shield of the present invention against the impingement force of an air flow.
The meaning of each reference numeral in the figures is:
1-protective cover, 2-current-conducting body, 3-connecting rod and 4-vent pipeline outlet.
The details of the invention are explained in further detail below with reference to the accompanying drawings.
Detailed Description
The following specific embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention.
The minimum distance of the air release is a term used in the field, and specifically refers to the vertical distance between the edge of the outlet pipeline of the air release pipeline and the surface where the protective cover is located. In particular to the invention, if the circular tube is a venting circular tube, the distance between the point where the axis of the circular tube and the arc edge of the circular tube intersect and the vertical line of a certain tangent plane of the side surface of the cone is meant; if the square tube is discharged, the distance between the midpoint of one side of the square tube and the perpendicular line of the side surface of the straight triangular prism is referred to.
The protection cover and the diversion body are of polyhedral structures, the longitudinal sections of the protection cover and the diversion body are of triangular structures, the connection part of one end of the protection cover and one end of the diversion body is in surface contact, the cross section area of the protection cover gradually decreases from the connection part of the protection cover and the diversion body to the end of the protection cover far away from an outlet of an industrial gas compressor air discharge pipeline, namely the longitudinal section of the protection cover is of a triangular structure with an upper vertex, the cross section area of the diversion body gradually decreases from the connection part of the protection cover and the diversion body to the end of the diversion body near the outlet of the industrial gas compressor air discharge pipeline, namely the longitudinal section of the diversion body is of a triangular structure with a lower vertex, and the edge corresponding to the vertex of the protection cover coincides with the edge corresponding to the vertex of the diversion body. The inventor finds that the special structure with large middle and small two ends can form smooth airflow diversion at the diversion body, the airflow of the protective cover can be slightly recovered, the noise is greatly reduced during ventilation comprehensively, and meanwhile, importantly, the airflow can generate a downward pressure through the diversion body, so that the lifting force generated by the airflow through the diversion body is reduced, and the excellent stability of the ventilation protective cover can be ensured. The invention has low noise and strong stability, which is a core technology, and realizes ingenious idea of guiding and uniformly distributing air flow. At present, the product is in a test stage, and the effect is obvious.
Example 1:
according to the technical scheme, as shown in fig. 1-5, the embodiment provides an industrial gas compressor air release shield comprising a shield 1, a guide body 2 and a connecting rod 3. Wherein, the protective cover 1 is positioned at the top, prevents rain, snow, dust and the like from entering the air supply pipeline and is evenly discharged downwards along the edge; the flow guiding body 2 is positioned below the protective cover 1, and guides the air flow from bottom to top in the air supply pipeline, so that the resistance is small, the friction force is small, and the noise is also small.
As an embodiment, the industrial gas compressor air release shield comprises a cone shield, a diversion cone and a connecting rod, and is suitable for circular pipes at the outlet of an air release pipeline.
Specifically, the cone protective cover is formed by rolling and welding a fan-shaped iron plate; the guide cone is also formed by rolling and welding a fan-shaped iron plate;
the diameters of the cone protective cover and the bottom surface of the diversion cone are the same; the diameters of the bottom surfaces of the cone protective cover and the diversion cone are larger than or equal to the diameter of the air supply pipeline;
the cone protective cover is in butt joint with the bottom surface of the diversion cone and is welded into a whole along the circumference of the outer circle, namely, a double cone;
the connecting rod is used for connecting the outlet of the air release pipeline with the bicone, and welding is completed.
As another embodiment, the industrial gas compressor discharge shroud comprises a straight triangular prism protective cover, a guide straight triangular prism and a connecting rod, wherein a discharge outlet pipeline is a square pipe;
specifically, the right triangular prism protective cover is formed by rolling and welding a rectangular iron plate; the guide straight triangular prism is also formed by rolling and welding a rectangular iron plate;
the bottom surfaces of the right triangular prism protection cover and the diversion right triangular prism are isosceles triangles, and the bottom edges are equal to the height;
the side areas of the straight triangular prism protective cover and the diversion straight triangular prism are larger than or equal to the area of the air discharge square pipe;
the side surfaces of the straight triangular prism protective cover and the side surfaces of the diversion straight triangular prism are in butt joint and welded into a whole along the periphery, namely the double straight triangular prisms;
the connecting rod is used for connecting the outlet of the air release pipeline with the double-straight triangular prism, and welding is completed.
Meanwhile, in the invention, the height of the protective cover determines the rainwater drainage speed and the dust adhesion amount. The height of the deflector determines the angle of deflection. The flow guiding angle and the length of the connecting rod determine the area of the air flow outlet.
The invention is further illustrated with reference to fig. 2-5:
1. cone air release shield
1. The cone shield is formed by rolling a fan-shaped iron plate into a cone, the fan-shaped angle of the cone shield determines the height of the cone shield, and two radius edges are welded; the guide cone is also formed by rolling a fan-shaped iron plate into a cone, the fan-shaped angle of the guide cone determines the height of the guide cone, and two radius edges are welded;
2. the diameters of the bottom surfaces of the cone protection cover and the guide cone are equal, the cone protection cover is positioned at the top, the guide cone is positioned at the lower part and the inverted position. Attaching the bottom surface and welding the circumference of the bottom surface;
3. the connecting rods are selected, the length is adjusted to ensure that the outlet area of the connecting rods is larger than or equal to the pipeline area of the air outlet, and the number of the connecting rods is proper (at least 2 and at most 20), and the number of the connecting rods is generally recommended to be even, and 4 or 8 are most proper.
4. Size requirements:
S=π·r·l 1 (2)
in the above formula:
h 2 indicating the height of the cone shield;
r represents the radius of the bottom surface of the double cone shield;
alpha represents an included angle between a bus of the cone protective cover and the bottom surface;
h 1 indicating the height of the pilot cone;
θ represents the included angle between the generatrix of the diversion cone and the bottom surface;
l 1 representing the minimum distance of the blow-off;
r represents the radius of the circular ventilation pipe;
h represents the height of the shield;
s represents the minimum area at the vent outlet.
In the course of the processing procedure, the processing tool,in the above formula:
R 1 the radius of the fan-shaped iron plate of the cone protective cover is shown;
the angle of the fan-shaped iron plate of the cone shield is shown.
In the above formula:
R 2 representing the radius of the fan-shaped iron plate of the diversion cone;
the angle of the fan-shaped iron plate of the diversion cone is shown.
Wherein:
in order to obtain the best effect, it is suggested that α select 30 °, θ select 45 °, s=1.2pi·r 2
2. Straight triangular prism ventilation shield
1. The right triangular prism protective cover is formed by rolling and welding a rectangular iron plate and welding triangular steel plates on two sides; the diversion straight triangular prism is also formed by rolling and welding a rectangular iron plate and welding triangular steel plates on two sides;
2. the side surface length and width of the straight triangular prism protection cover and the side surface width of the flow guiding triangular prism are equal, the straight triangular prism protection cover is positioned at the top, the side standing position and the flow guiding straight triangular prism is positioned at the lower part and the side standing position. Attaching and welding the side face to the circumference;
3. the connecting rods are selected, the length is adjusted to ensure that the outlet area of the connecting rods is larger than or equal to the pipeline area of the air outlet, and the number of the connecting rods is proper (at least 2 and at most 20), and the number of the connecting rods is generally recommended to be even, and 4 or 8 are most proper.
4. Size requirements:
S=2L·l 2 (6)
in the above formula:
h 2 the height of an isosceles triangle on the bottom surface of the right triangular prism protective cover is represented;
l represents half of the bottom side of an isosceles triangle of the bottom surface of the double-straight prism shield;
alpha represents an included angle between the bottom side of the isosceles triangle of the bottom surface of the right triangular prism protective cover and the waist;
h 1 the height of an isosceles triangle on the bottom surface of the diversion straight triangular prism is shown;
θ represents the included angle between the bottom side of the isosceles triangle on the bottom surface of the diversion right triangular prism and the waist;
l 2 representing the minimum distance of the blow-off;
l represents half of the side length of the air release square tube;
h represents the height of the shield;
s represents the minimum area at the vent outlet.
In the course of the processing procedure, the processing tool,in the above formula:
R 1 representing half of the rectangular iron plate length of the rectangular triangular prism protective cover;
in the above formula:
R 2 representing half of the length of a rectangular iron plate of the diversion straight triangular prism;
wherein:
in order to obtain the best effect, it is recommended that α select 30 °, θ select 45 °, s=1.2 (2 l) 2
3. The air release shield is stressed and decomposed:
as shown in fig. 5, when the fluid blows against the side of the fluid guide body, the force applied to a certain point on the side of the fluid guide body is analyzed:
in the above formula:
f represents the impact force of the air flow at the outlet of the fan on the shield vertically upwards;
F r indicating the force to atmosphere;
F t indicating the radial force to which the shroud is subjected;
θ represents the included angle between the generatrix of the diversion cone and the bottom surface or the included angle between the bottom side of the isosceles triangle of the bottom surface of the diversion right triangular prism and the waist.
Wherein: f (F) t <F, the shield can reduce the impact force of air flow on the shield and increase the stability of the device.
And detecting low-noise airflow of the conical air release shield, wherein the detection point is arranged at the position of the contact surface of the shield and the diversion body. The results show that the use of the device of the present invention can reduce the airflow noise value by 44% when the airflow outlet speed is the same.

Claims (8)

1. The industrial gas compressor air release shield is characterized by comprising a shield (1), a guide body (2) and a plurality of connecting rods (3);
the protective cover (1) is used for preventing sundries from entering an air discharge pipeline of the industrial gas compressor, and the protective cover (1) is connected with the diversion body (2);
the guide body (2) is used for guiding the air flow at the outlet of the air discharge pipeline of the industrial gas compressor, and the guide body (2) is positioned below the protective cover (1);
the protective cover (1) and the guide body (2) are connected with an outlet of an air discharge pipeline of the industrial gas compressor by the connecting rod (3);
the protective cover (1) and the guide body (2) are of polyhedral structures, longitudinal sections of the protective cover (1) and the guide body (2) are of triangular structures, and the joint of one end of the protective cover (1) and one end of the guide body (2) is in surface contact;
the cross section area of the protective cover (1) is gradually reduced from the contact position of the protective cover (1) and the guide body (2) to one end of the protective cover (1) away from the outlet of the air discharge pipeline of the industrial gas compressor;
the cross section area of the guide body (2) is gradually reduced from the contact position of the protective cover (1) and the guide body (2) to one end of the guide body (2) close to the outlet of the air discharge pipeline of the industrial gas compressor;
the protective cover (1) and the guide body (2) are of conical structures, the bottom surface of the protective cover (1) is connected with the bottom surface of the guide body (2), and the diameter of the bottom surface of the protective cover (1) is the same as that of the guide body (2);
the protection cover (1) and the diversion body (2) are all isosceles right triangular prism structures, the side surfaces of the protection cover (1) and the diversion body (2) are overlapped and connected, and the side surfaces are the side surfaces of the sides of the isosceles right triangular prism, where the bottom surfaces of the isosceles right triangular prisms are not isosceles.
2. The industrial gas compressor discharge shroud as claimed in claim 1, wherein the height of the cone of the shroud (1) is lower than the height of the cone of the guide body (2), and the diameter of the bottom surface of the cone of the shroud (1) or the cone of the guide body (2) is not smaller than the diameter of the discharge pipeline of the industrial gas compressor.
3. An industrial gas compressor discharge shield according to claim 2, wherein the shield (1) and the guide body (2) are integrally formed along a circle of the bottom surface circle, and are connected with the outlet of the industrial gas compressor discharge pipeline through the connecting rod (3), and the outlet airflow of the industrial gas compressor discharge pipeline is discharged from the periphery of the guide body (2).
4. An industrial gas compressor discharge shroud as claimed in claim 2 or 3 wherein said industrial gas compressor discharge shroud is constructed to:
wherein: h is a 2 Is high in the protective cover; h is a 1 Is the height of the current carrier; r is the radius of the bottom surface of the protective cover or the cone of the diversion body; r is the radius of the air release pipeline; alpha represents the included angle between the bus and the bottom surface of the protective cover; θ represents the included angle between the bus and the bottom surface of the current carrier; l (L) 1 Is the minimum distance of the ventilation; h represents the height of the bottom surface of the shield or the cone of the deflector from the outlet of the air release pipeline.
5. The exhaust hood of the industrial gas compressor according to claim 1, wherein the bottom surface of the hood (1) is higher than the bottom surface of the guide body (2), and the area of the side surface of the isosceles right triangular prism of the hood (1) or the superposition of the isosceles right triangular prism of the guide body (2) is not smaller than the area of the outlet of the exhaust pipeline of the industrial gas compressor.
6. An industrial gas compressor discharge shield according to claim 5, wherein the shield (1) and the guide body (2) are integrally formed along a circumference of the overlapped side surfaces, and are connected with an outlet of a discharge pipeline of the industrial gas compressor through the connecting rod (3), and the outlet airflow of the discharge pipeline of the industrial gas compressor is discharged from the side surface of the guide body (2).
7. An industrial gas compressor discharge shroud as claimed in claim 1, 5 or 6 wherein said industrial gas compressor discharge shroud is constructed to:
wherein: h is a 2 Is isosceles triangle-shaped high on the bottom surface of the protective cover; h is a 1 Is isosceles triangle-shaped high on the bottom surface of the diversion body; l is half of the bottom side of an isosceles triangle on the bottom surface of the protective cover or the diversion body; alpha represents an included angle between the bottom side of the isosceles triangle on the bottom surface of the protective cover and the waist; θ represents the included angle between the bottom side of the isosceles triangle on the bottom surface of the flow guiding body and the waist; l (L) 2 Representing the minimum distance of the blow-off; l represents the air release pipeHalf of the track side length; h represents the height of the plane where the contact surface of the protective cover or the guide body is located from the outlet of the air release pipeline.
8. The industrial gas compressor discharge shroud of claim 1, wherein the number of tie bars is 2-20 and the number of tie bars is even.
CN201910707823.0A 2019-08-01 2019-08-01 Air release shield of industrial gas compressor Active CN110439782B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN110439782B true CN110439782B (en) 2024-04-09

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101263306A (en) * 2005-09-13 2008-09-10 英格索尔-兰德公司 Diffuser for a centrifugal compressor
CN104764064A (en) * 2015-03-24 2015-07-08 李俊江 A dynamic oil smoke protective cover for a draught fan
CN208236754U (en) * 2018-05-29 2018-12-14 上海宇炫工程技术有限公司 A kind of noise reducing type blast cap with uniform flow-guiding structure
CN210714979U (en) * 2019-08-01 2020-06-09 西安陕鼓动力股份有限公司 Industrial gas compressor air release shield

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607308B2 (en) * 2005-12-08 2009-10-27 General Electric Company Shrouded turbofan bleed duct

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101263306A (en) * 2005-09-13 2008-09-10 英格索尔-兰德公司 Diffuser for a centrifugal compressor
CN104764064A (en) * 2015-03-24 2015-07-08 李俊江 A dynamic oil smoke protective cover for a draught fan
CN208236754U (en) * 2018-05-29 2018-12-14 上海宇炫工程技术有限公司 A kind of noise reducing type blast cap with uniform flow-guiding structure
CN210714979U (en) * 2019-08-01 2020-06-09 西安陕鼓动力股份有限公司 Industrial gas compressor air release shield

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