CN111721498A - Multi-parameter multifunctional dynamic static cavity experiment table - Google Patents

Multi-parameter multifunctional dynamic static cavity experiment table Download PDF

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CN111721498A
CN111721498A CN202010611934.4A CN202010611934A CN111721498A CN 111721498 A CN111721498 A CN 111721498A CN 202010611934 A CN202010611934 A CN 202010611934A CN 111721498 A CN111721498 A CN 111721498A
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static
flow
handle
dynamic
disc
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CN111721498B (en
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顾延东
成立
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Yangzhou University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00—Supporting devices; Holding devices
    • B01L9/02—Laboratory benches or tables; Fittings therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/06—Measuring arrangements specially adapted for aerodynamic testing

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Abstract

The invention provides a multi-parameter multifunctional dynamic and static cavity experiment table, which utilizes a dynamic disk, a static disk and a circular ring baffle to form a dynamic and static cavity which is arranged in a shell. The axial position of the static disc is controlled by using a handle, and the through-flow pre-rotation direction is controlled by using the handle and the movable guide vanes. And measuring the torque, the rotating speed and the axial force of the movable disc by using the torque/rotating speed/force sensor. In the flow loop, a pressure sensor and a flowmeter are arranged to measure the pressure and the flow rate of the inlet and the outlet of the dynamic and static cavities. A telescopic piezometer tube penetrates through the shell and the static disc to collect the fluid pressure on the wall surface of the static disc. The shell and the like are processed by using high-transparency materials and are used for visualization experiments. The invention is easy to realize the research on a plurality of parameters such as Reynolds number, width-diameter ratio, flux, through-flow prewhirl and the like, and has a plurality of functions such as external characteristic measurement (torque, rotating speed, axial force and the like), internal flow measurement (pressure, speed and the like) and the like. The invention has novel structure, convenient assembly and disassembly and simple operation.

Description

Multi-parameter multifunctional dynamic static cavity experiment table
Technical Field
The invention relates to a multi-parameter multifunctional dynamic and static cavity experiment table, and belongs to the field of dynamic and static cavity research.
Background
The dynamic and static cavities refer to a flowing area between the rotating disc and the static disc, and as shown in figure 1, the dynamic and static cavities are not only a classical fluid mechanics research object, but also an engineering problem which is widely existed in rotating machinery in the fields of petrochemical industry, water conservancy and hydropower, ocean engineering, aerospace power, nuclear power equipment and the like. The dynamic and static cavity experimental study is of great importance, but in the current experimental setup, the width-diameter ratio continuous adjustment is difficult to realize, the wet surface torque measurement of the movable disc is difficult to realize, and the through-flow prerotation adjustment cannot be realized.
Disclosure of Invention
The invention aims to provide a multi-parameter and multifunctional dynamic static cavity experiment table aiming at the problems.
The invention aims to realize the multi-parameter multifunctional dynamic and static cavity experiment table which is characterized by comprising a dynamic and static cavity, a dynamic disk, a static disk, a circular ring baffle, a shell, a movable guide vane A, a handle rod A, a movable guide vane B, a handle rod C, a pressure measuring pipe, a shaft, a torque/rotating speed/force sensor and a variable frequency motor, wherein the dynamic and static cavity is arranged on the shell;
the movable disc, the static disc and the circular ring baffle are arranged in the shell, and the movable disc, the static disc and the circular ring baffle form a movable cavity and a static cavity; one end of the shaft is fixedly connected with a power output shaft of the variable frequency motor, the other end of the shaft is arranged in the shell and fixedly connected with the movable disc, the torque/rotating speed/force sensor is arranged on the shaft and used for measuring the torque, the rotating speed and the axial force of the movable disc, and the variable frequency motor controls the rotating speed of the movable disc;
the shell is provided with a through flow port A and a through flow port B which are communicated with the dynamic and static cavities, the through flow port A and the through flow port B are both connected to the water tank through pipelines, a booster pump A, a flowmeter and a pressure sensor A are arranged on a pipeline between the through flow port A and the water tank, a booster pump B and a pressure sensor B are arranged on a pipeline between the through flow port B and the water tank, the pressure sensor A, the pressure sensor B, the flowmeter A and the flowmeter B measure the pressure and the flow of the through flow port A and the through flow port B which are connected with the dynamic and static cavities, and the booster pump A and the booster pump B control the flow in the dynamic;
the pressure measuring pipe penetrates through the shell and the static disc, one end of the pressure measuring pipe is connected with the pressure sensor C, and the other end of the pressure measuring pipe is used for contacting fluid on the inner wall surface of the static disc and measuring the fluid pressure on the inner wall surface of the static disc;
the handle C penetrates through the shell and is connected with the static disc, the handle C is in threaded screwed connection with the shell, a threaded through hole C is formed in the shell, an external thread matched with the threaded through hole C is formed in the outer wall of the handle C, the handle C is screwed in the threaded through hole C, the handle C is rotated and extends into or out of the shell to control the axial position of the static disc, and a handle C is arranged on the handle C;
the side wall of the through-flow opening A is provided with a handle rod A and a movable guide vane A, the handle rod A is provided with a handle A, the handle rod A is in threaded screwed connection with the side wall of the through-flow opening A, the side wall of the through-flow opening A is provided with a threaded through hole A, the outer wall of the handle rod A is provided with an external thread matched with the threaded through hole A, the handle rod A is screwed in the threaded through hole A, the handle rod A penetrates through the side wall of the through-flow opening A to be connected with the movable guide vane A, the handle rod A is rotated, and the centrifugal through-flow pre-screwing angle is controlled;
be equipped with handle bar B and adjustable guide vane B on through-flow mouthful B's lateral wall, be equipped with handle B on handle bar B, handle bar B connects soon with through-flow mouthful B's lateral wall screw thread to be connected, be equipped with screw thread through-hole B on through-flow mouthful B's the lateral wall, be equipped with on handle bar B's the outer wall with screw thread through-hole B assorted external screw thread, handle bar B revolves in screw thread through-hole B, handle bar B passes through-flow mouthful B's lateral wall and links to each other with adjustable guide vane B, rotatory handle bar B, through adjustable guide vane B control centripetal through-flow through-.
The booster pump A, the flowmeter and the pressure sensor A are sequentially arranged from one end of a pipeline connected with the water tank to one end of a pipeline connected with the through-flow opening A;
the booster pump B and the pressure sensor B are sequentially arranged from one end of the pipeline connected with the water tank to one end of the pipeline connected with the through-flow port B.
The movable guide vanes B are uniformly distributed in the circumferential direction, and the number of the movable guide vanes B is not less than 12; the movable guide vanes A are circumferentially and uniformly distributed, and the number of the movable guide vanes A is not less than 3.
The pressure measuring pipe is a telescopic pipe, and when the axial position of the static disc is adjusted, one end of the pressure measuring pipe is kept flush with the inner wall surface of the static disc.
The static disc, the circular ring baffle, the shell and the movable guide vane B are all made of transparent materials.
The radial clearance between the static disc and the circular ring baffle, the interface between the handle A and the shell, the interface between the handle B and the shell, the interface between the handle rod C and the shell, and the interface between the pressure measuring pipe and the shell are sealed.
The flow opening A faces downwards and is used for researching the liquid flow of the dynamic and static cavities, the torque and the axial force of the dynamic disc are measured in a dry mode, the torque and the axial force of the dynamic disc are measured in a wet mode, and the torque and the axial force of the wet surface of the dynamic disc are obtained by subtracting the torque and the axial force of the dynamic disc from each other; the through flow port A can be used for the research of the gas flow of the dynamic and static cavities in any direction.
The movable disc and the shell are in clearance fit in the radial direction, and the clearance value is not larger than 1 mm.
When the through-flow port A is a through-flow inlet, the through-flow port B is a through-flow outlet and the movable guide vane B is radial, the handle rod A and the movable guide vane A are adjusted, and the influence of centrifugal through-flow and through-flow prerotation angles on the internal and external characteristics of the movable and static cavities is researched; when the through-flow port A is a through-flow outlet, the through-flow port B is a through-flow inlet, and the movable guide vane A is radial, the handle B and the movable guide vane B are adjusted to study the influence of radial through-flow and through-flow prerotation angle on the internal and external characteristics of the movable and static cavities.
Closing the through flow port A and the through flow port B, carrying out a closed dynamic and static cavity experiment, measuring the torques under different width-diameter ratios and Reynolds numbers, and carrying out dimensionless treatment on the torques by utilizing the following formula:
Figure BDA0002562257760000031
in the formula, CmIs the dimensionless torque of the moving disk, T is the torque of the moving disk, ρ is the fluid density, ω is the angular velocity of the moving disk, b is the axial width of the moving and static cavities;
in order to establish a formula of dimensionless torque about the ratio of width to diameter and Reynolds number, fitting the following formula by using a nonlinear least square method, and determining undetermined coefficients m, n and l:
Figure BDA0002562257760000032
wherein G is the ratio of width to diameter of the dynamic and static cavities (G ═ b/R),
Figure BDA0002562257760000033
reynolds number of dynamic and static cavities
Figure BDA0002562257760000034
R is the radius of the rotor and upsilon is the fluid kinematic viscosity.
The invention provides a multi-parameter and multifunctional dynamic static cavity experiment table, which can realize the research on a plurality of parameters such as Reynolds number, width-diameter ratio, through-flow rate, through-flow prerotation and the like, and has a plurality of functions such as external characteristic measurement (torque, rotating speed, axial force and the like) and internal flow measurement (pressure, speed and the like). A multi-parameter multifunctional dynamic and static cavity experiment table comprises a dynamic and static cavity, a dynamic disk, a static disk, a circular ring baffle, a shell, a through flow opening A, a through flow opening B, a movable guide vane A, a handle rod A, a movable guide vane B, a handle rod C, a pressure measuring pipe, a shaft, a torque/rotating speed/force sensor, a variable frequency motor, a water tank, a booster pump, a flowmeter and a pressure sensor. Utilize driving disk, quiet dish and ring baffle to form and move quiet chamber, place the casing in, the inside of moving quiet chamber flows and the external characteristic closes the tangent point for experimental study. The dynamic disk is connected with the shaft, the torque/rotating speed/force sensor and the variable frequency motor, the torque/rotating speed/force sensor measures the torque, the rotating speed and the axial force of the dynamic disk, the variable frequency motor controls the rotating speed of the dynamic disk and adjusts the Reynolds number of the dynamic cavity and the static cavity. The through-flow ports a and B are connected to the water tank. And a pressure sensor, a flowmeter and a booster pump are arranged on the pipelines of the through flow port A and the through flow port B, the pressure sensor and the flowmeter measure the pressure and the flow of the inlet and the outlet of the dynamic and static cavities, and the booster pump controls the flow of the dynamic and static cavities. The pressure measuring pipe penetrates through the shell and the static disc, one end of the pressure measuring pipe is connected with the pressure sensor, and the other end of the pressure measuring pipe is in contact with fluid on the inner wall surface of the static disc to measure the fluid pressure on the inner wall surface of the static disc. The handle C penetrates through the shell and is connected with the static disc, the axial position of the static disc is controlled, and the width-diameter ratio of the dynamic and static cavities is adjusted. And a handle A and a movable guide vane A are arranged at the through-flow opening A to control the centrifugal through-flow pre-rotation angle. The movable guide vanes A are circumferentially and uniformly distributed, and the number of the movable guide vanes A is not less than 3. And the centripetal through-flow pre-rotation angle is controlled by the through-flow opening B, the handle B and the movable guide vane B. The movable guide vanes B are uniformly distributed in the circumferential direction, and the number of the movable guide vanes B is not less than 12.
Further, the piezometric tube is a telescopic tube. When the axial position of the static disc is adjusted, one end of the piezometer tube is kept to be flush with the inner wall surface of the static disc.
The static disc, the circular ring baffle, the shell and the movable guide vane B are made of transparent materials and used for visual measurement of speed.
The radial clearance between the static disc and the circular ring baffle, the interface between the handle A and the shell, the interface between the handle B and the shell, the interface between the handle C and the shell, and the interface between the pressure measuring pipe and the shell need to be sealed.
The flow opening A faces downwards and is used for researching the liquid flow of the dynamic and static cavities, the torque and the axial force of the dynamic disc are measured in a dry mode, the torque and the axial force of the dynamic disc are measured in a wet mode, and the torque and the axial force of the wet surface of the dynamic disc are obtained by subtracting the torque and the axial force of the dynamic disc from each other. The through flow port A can be used for the research of the gas flow of the dynamic and static cavities in any direction.
The movable disc and the shell are in clearance fit in the radial direction, and the clearance value is not larger than 1 mm.
When the through-flow port A is a through-flow inlet, the through-flow port B is a through-flow outlet and the movable guide vane B is radial, the handle A and the movable guide vane A are adjusted to study the influence of centrifugal through-flow and through-flow pre-rotation angles on the internal and external characteristics of the movable and static cavities. When the through-flow port A is a through-flow outlet, the through-flow port B is a through-flow inlet, and the movable guide vane A is radial, the handle B and the movable guide vane B are adjusted to study the influence of radial through-flow and through-flow prerotation angle on the internal and external characteristics of the movable and static cavities.
Closing the through flow port A and the through flow port B, carrying out a closed dynamic and static cavity experiment, and measuring different width-diameter ratios (G is B/R, B is the axial width of the dynamic and static cavities, R is the radius of the dynamic disk) and Reynolds numbers
Figure BDA0002562257760000041
ω is the angular velocity of the rotor and υ is the kinematic viscosity), and the torque is subjected to dimensionless treatment, see formula (1). And (3) performing data fitting on the formula (2) by using a nonlinear least square method, determining undetermined coefficients m, n and l, and establishing a dimensionless torque-width-diameter ratio and Reynolds number formula.
Torque dimensionless:
Figure BDA0002562257760000042
dimensionless torque equation:
Figure BDA0002562257760000043
where T is the rotor torque and ρ is the fluid density.
In summary, according to the invention, the movable disc, the static disc and the ring baffle are used to form the movable and static cavities which are arranged in one shell. The axial position of the static disc is controlled by using a handle, and the through-flow pre-rotation direction is controlled by using the handle and the movable guide vanes. And measuring the torque, the rotating speed and the axial force of the movable disc by using the torque/rotating speed/force sensor. In the flow loop, a pressure sensor and a flowmeter are arranged to measure the pressure and the flow rate of the inlet and the outlet of the dynamic and static cavities. A telescopic piezometer tube penetrates through the shell and the static disc to collect the fluid pressure on the wall surface of the static disc. The shell and the like are processed by using high-transparency materials and are used for visualization experiments. The invention is easy to realize the research on a plurality of parameters such as Reynolds number, width-diameter ratio, flux, through-flow prewhirl and the like, and has a plurality of functions such as external characteristic measurement (torque, rotating speed, axial force and the like), internal flow measurement (pressure, speed and the like) and the like. The multi-parameter multifunctional dynamic static cavity experiment table provided by the invention has the advantages of novel structure, convenience in disassembly and assembly and simplicity in operation.
Drawings
FIG. 1 is a schematic view of a dynamic and static cavity structure;
FIG. 2 is a schematic structural view of a multi-parameter multifunctional dynamic static cavity experiment table;
FIG. 3 is a schematic diagram showing the dimensions of the dynamic and static chambers;
in the figure: the device comprises a movable cavity 1, a movable cavity 2, a fixed cavity 3, a ring baffle 4, a shell 5, a flow port A6, a flow port B7, a movable guide vane A8, a handle A9, a movable guide vane B10, a handle B11, a handle C12, a pressure measuring pipe 13, a shaft 14, a torque/rotating speed/force sensor 15, a variable frequency motor 16, a water tank 17, a booster pump A18-1, a booster pump B18-2, a flow meter 19, a pressure sensor A20-1, a pressure sensor B20-2 and a pressure sensor C20-3.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
A multi-parameter multifunctional dynamic and static cavity experiment table comprises a dynamic and static cavity 1, a dynamic disk 2, a static disk 3, a circular ring baffle 4, a shell 5, a movable guide vane A8, a handle rod A9, a movable guide vane B10, a handle rod B11, a handle rod C12, a pressure measuring pipe 13, a shaft 14, a torque/rotating speed/force sensor 15 and a variable frequency motor 16. Arranging a movable disc 2, a static disc 3 and a circular ring baffle 4 in a shell 5, wherein the movable disc 2, the static disc 3 and the circular ring baffle 4 form a movable and static cavity 1; one end of the shaft 14 is fixedly connected with a power output shaft of the variable frequency motor 16, the other end of the shaft is arranged in the shell 5 and fixedly connected with the movable disc 2, the torque/rotating speed/force sensor 15 is arranged on the shaft 14, the torque/rotating speed/force sensor 15 measures the torque, the rotating speed and the axial force of the movable disc 2, and the variable frequency motor 16 controls the rotating speed of the movable disc 2.
A through-flow port A6 and a through-flow port B7 which are communicated with the dynamic and static cavities 1 are arranged on the shell 5, both the through-flow port A6 and the through-flow port B7 are connected to the water tank 17 through pipelines, a booster pump A18-1, a flow meter 19 and a pressure sensor A20-1 are arranged on the pipeline between the through-flow port A6 and the water tank 17, a booster pump B18-2 and a pressure sensor B20-2 are arranged on the pipeline between the through-flow port B7 and the water tank 17, a pressure sensor A20-1, a pressure sensor B20-2, a flow meter A19-1 and a flow meter B19-2 are arranged on the pipeline between the through-flow port B7 and the water tank 17 to measure the pressure and the flow rate of the through-flow port A6 and the through-flow port B7 which are connected with.
The pressure measuring pipe 13 penetrates through the shell 5 and the static disc 3, one end of the pressure measuring pipe is connected with a pressure sensor C20-3, and the other end of the pressure measuring pipe is used for contacting fluid on the inner wall surface of the static disc 3 and measuring the fluid pressure on the inner wall surface of the static disc 3.
Handle pole C12 passes casing 5 and links to each other with quiet dish 3, handle pole C12 is connected with casing 5 screw thread spiral, set up screw thread through-hole C on the casing 5, set up on the outer wall of handle pole C12 with screw thread through-hole C assorted external screw thread, handle pole C12 revolves in screw thread through-hole C, rotatory handle pole C12, handle pole C12 stretches into or stretches out to casing 5 is interior, the axial position of control quiet dish 3, be equipped with handle C on the handle pole C12.
A handle rod A9 and a movable guide vane A8 are arranged on the side wall of the through-flow opening A6, a handle A is arranged on a handle rod A9, a handle A9 is in threaded screwed connection with the side wall of the through-flow opening A6, a threaded through hole A is arranged on the side wall of the through-flow opening A6, an external thread matched with the threaded through hole A is arranged on the outer wall of the handle rod A9, a handle rod A9 is screwed in the threaded through hole A, the handle rod A9 penetrates through the side wall of the through-flow opening A6 to be connected with the movable guide vane A8, the handle rod A9 is rotated, and the centrifugal through-flow pre-rotation angle is controlled through;
be equipped with handle bar B11 and activity stator B10 on through-flow port B7's lateral wall, be equipped with handle B on the handle bar B11, handle bar B11 connects soon with through-flow port B7's lateral wall screw thread, be equipped with screw through-hole B on through-flow port B7's the lateral wall, be equipped with the external screw thread with screw through-hole B assorted on the outer wall of handle bar B11, handle bar B11 revolves in screw through-hole B, handle bar B11 passes through the lateral wall of through-flow port B7 and links to each other with activity stator B10, rotatory handle bar B11, through activity stator B10 control centripetal through-flow prerotation angle.
Further, a booster pump A18-1, a flow meter 19 and a pressure sensor A20-1 are sequentially arranged from one end of a pipeline connected with the water tank 17 to one end of a pipeline connected with the through-flow port A6; the booster pump B18-2 and the pressure sensor B20-2 are arranged in this order from one end of the pipe connected to the water tank 17 to one end of the pipe connected to the through-flow port B7.
The movable guide vanes B10 are uniformly distributed in the circumferential direction, and the number of the movable guide vanes B10 is not less than 12; the movable guide vanes A8 are uniformly distributed in the circumferential direction, and the number is not less than 3. The pressure measuring pipe 13 is a telescopic pipe, and when the axial position of the static disc 3 is adjusted, one end of the pressure measuring pipe 13 is kept flush with the inner wall surface of the static disc 3. The static disc 3, the circular ring baffle 4, the shell 5 and the movable guide vane B10 are all made of transparent materials. The radial clearance between the static disc 3 and the circular ring baffle 4, the interface between the handle A9 and the shell 5, the interface between the handle B11 and the shell 5, the interface between the handle lever C12 and the shell 5, and the interface between the pressure measuring pipe 13 and the shell 5 are sealed. The flow port A6 faces downwards, and is used for liquid flow research of the dynamic and static cavities 1, the torque and the axial force of the dynamic disc 2 are measured in a dry mode, the torque and the axial force of the dynamic disc 2 are measured in a wet mode, and the torque and the axial force of the wet surface of the dynamic disc 2 are obtained by subtracting the torque and the axial force of the dynamic disc 2; any direction of the through flow port A6 can be used for the research of the gas flow of the dynamic and static cavities 1. The movable disc 2 and the shell 5 are in clearance fit in the radial direction, and the clearance value is not more than 1 mm. When the through-flow port A6 is a through-flow inlet, the through-flow port B7 is a through-flow outlet and the movable guide vane B10 is centripetal in the chord direction, the handle rod A9 and the movable guide vane A8 are adjusted to study the influence of centrifugal through-flow and through-flow pre-rotation angles on the internal and external characteristics of the movable and static cavities 1; when the through-flow port A6 is a through-flow outlet, the through-flow port B7 is a through-flow inlet and the movable guide vane A8 is radial in chord direction, the handle B11 and the movable guide vane B10 are adjusted to study the influence of radial through-flow and through-flow pre-rotation angle on the internal and external characteristics of the movable and static cavities 1.
Closing the through flow port A6 and the through flow port B7, carrying out a closed dynamic and static cavity 1 experiment, measuring the torques under different width-diameter ratios and Reynolds numbers, and carrying out dimensionless treatment on the torques by utilizing the following formula:
Figure BDA0002562257760000071
in the formula, CmIs the dimensionless torque of the movable disc 2, T is the torque of the movable disc 2, rho is the fluid density, omega is the angular velocity of the movable disc 2, b is the axial width of the dynamic and static cavities 1;
in order to establish a formula of dimensionless torque about the ratio of width to diameter and Reynolds number, fitting the following formula by using a nonlinear least square method, and determining undetermined coefficients m, n and l:
Figure BDA0002562257760000072
wherein G is the width ratio (G ═ b/R) of the dynamic and static cavities 1,
Figure BDA0002562257760000073
is Reynolds number of the dynamic and static cavities (1)
Figure BDA0002562257760000074
R is the radius of the rotor 2 and upsilon is the fluid kinematic viscosity.
The water is used as a working medium, the radius R of the movable disc 2 is 80mm, the rotating speed range of the variable frequency motor 16 is 0-3000R/min, the axial width b range of the movable and static cavities 1 is 2.4-24 mm, the width-to-diameter ratio range of the experiment is 0.03-0.3, and the Reynolds number range (the kinematic viscosity of the water is 8.93 × 10)-7m2/s) is 0 to 2.25 × 106. The flux is 0-0.1 m3And/s, the through-flow pre-rotation angle is 0-60 degrees. And (3) establishing an experiment table shown in fig. 2, and researching the influence of the aspect ratio, the Reynolds number, the through flow and the through flow prerotation angle on the internal and external characteristics of the dynamic and static cavities.
The following is a specific bench design.
The movable disc 2, the static disc 3 and the ring baffle 4 form a movable static cavity 1, the movable static cavity is arranged in the shell 5, and experimental research is carried out on the internal flow and the external characteristics of the movable static cavity 1. The movable disc 2 is connected with a shaft 14, a torque/rotating speed/force sensor 15 and a variable frequency motor 16, the torque/rotating speed/force sensor 15 measures the torque, the rotating speed and the axial force of the movable disc 2, and the variable frequency motor 16 controls the rotating speed of the movable disc 2 to adjust the Reynolds number of the movable and static cavities 1. The through-flow port a6 and the through-flow port B7 are connected to the water tank 17. A pressure sensor A20-1, a pressure sensor B20-2, a flow meter 19, a booster pump A18-1 and a booster pump B18-2 are arranged on a pipeline of the through flow port A6 and the through flow port B7, the pressure sensor A20-1, the pressure sensor B20-2 and the flow meter 19 measure the inlet and outlet pressure and flow rate of the dynamic and static cavity 1, and the booster pump A18-1 and the booster pump B18-2 are used for driving through flow in the dynamic and static cavity 1. The pressure measuring pipe 13 penetrates through the shell 5 and the static disc 3, one end of the pressure measuring pipe is connected with the pressure sensor 20, and the other end of the pressure measuring pipe is in contact with fluid on the inner wall surface of the static disc 3 to measure the fluid pressure on the inner wall surface of the static disc 3. The handle lever C12 passes through the housing 5 and connects to the stationary plate 3 to control the axial position of the stationary plate 3. The through-flow opening A6 is provided with a handle rod A9 and a movable guide vane A8 for controlling the pre-rotation angle of centrifugal through-flow. The movable guide vanes A8 are circumferentially and uniformly distributed, the number of the movable guide vanes is 3, and the axial uniformity of through flow is ensured. And a through-flow opening B7 is provided with a handle rod B11 and a movable guide vane B10 for controlling a centripetal through-flow prerotation angle. The movable guide vanes B10 are circumferentially and uniformly distributed, the number of the movable guide vanes B10 is 36, and the circumferential uniformity of through flow is ensured.
The pressure measuring pipe 13 is a telescopic pipe, and when the axial position of the static disc 3 is adjusted, one end of the pressure measuring pipe 13 is kept flush with the inner wall surface of the static disc 3. The static disc 3, the circular ring baffle 4, the shell 5 and the movable guide vane B10 are processed by organic glass, and the internal flow velocity of the static and dynamic cavities 1 is visually measured. The radial clearance between the static disc 3 and the circular ring baffle 4, the interface between the handle rod A9 and the shell 5, the interface between the handle rod B11 and the shell 5, the interface between the handle rod C12 and the shell 5, and the interface between the pressure measuring pipe 13 and the shell 5 are sealed. In order to obtain the torque and the axial force of the wet surface of the movable disc 2, the flow opening A6 faces downwards, and the measurement method comprises the following steps: the torque and the axial force of the movable disc 2 are measured in a dry mode, the torque and the axial force of the movable disc 2 are measured in a wet mode, and the torque and the axial force of the wet surface of the movable disc 2 are obtained by subtracting the torque and the axial force. The movable disc 2 is in clearance fit with the shell 5 in the radial direction, and the clearance value is 0.2 mm.
The following are bench parameter adjustments.
The variable frequency motor 16 is used for adjusting the rotating speed of the movable disc 2, the rotating speed range of the movable disc 2 is 0-3000 r/min, and the research Reynolds number is 0-2.25 × 106The internal and external characteristics of the lower dynamic and static cavity 1.
And adjusting a handle lever C12 to control the axial position of the static disc 3, wherein the adjustment range of the axial width is 2.4-24 mm, and the inner and outer characteristics of the dynamic and static cavities 1 with the width-diameter ratio of 0.03-0.3 are researched.
Opening a booster pump 18 on a pipeline with a through flow port A6, wherein the through flow port A6 is a through flow inlet, the through flow port B7 is a through flow outlet, and a movable guide vane B10 is centripetal in the chord direction, and researching the centrifugal through flow rate of 0-0.1 m3The internal and external characteristics of the lower dynamic and static cavity 1 are/s. In addition, the inside and outside characteristics of the static and dynamic cavities 1 under the condition that the centrifugal through-flow prerotation angle is 0-60 degrees are researched by adjusting the handle rod A9 and the movable guide vane A8.
Opening a booster pump 18 on a pipeline with a flow opening B7, wherein a flow opening A6 is a flow outlet, a flow opening B7 is a flow inlet, and when a movable guide vane A8 is centripetal in the chord direction, researching the centripetal flow rate of 0-0.1 m3The internal and external characteristics of the lower dynamic and static cavity 1 are/s. In addition, the inner and outer characteristics of the movable and static cavities 1 under the centripetal through-flow prerotation angle of 0-60 degrees are researched by adjusting the handle rod B11 and the movable guide vane B10.
Through the method, the research on the influence of the width-diameter ratio, the Reynolds number, the through flow and the through flow prerotation angle on the internal and external characteristics of the dynamic and static cavities 1 is realized, and the method has the advantages of novel structure, convenience in disassembly and assembly, simplicity in operation and the like.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. A multi-parameter multifunctional dynamic and static cavity experiment table is characterized by comprising a dynamic and static cavity (1), a dynamic disk (2), a static disk (3), a ring baffle (4), a shell (5), a movable guide vane A (8), a handle rod A (9), a movable guide vane B (10), a handle rod B (11), a handle rod C (12), a pressure measuring pipe (13), a shaft (14), a torque/rotating speed/force sensor (15) and a variable frequency motor (16);
the movable disc (2), the static disc (3) and the circular ring baffle (4) are arranged in the shell (5), and the movable disc (2), the static disc (3) and the circular ring baffle (4) form a movable static cavity (1); one end of the shaft (14) is fixedly connected with a power output shaft of the variable frequency motor (16), the other end of the shaft is arranged in the shell (5) and is fixedly connected with the movable disc (2), the torque/rotating speed/force sensor (15) is arranged on the shaft (14), the torque/rotating speed/force sensor (15) measures the torque, the rotating speed and the axial force of the movable disc (2), and the variable frequency motor (16) controls the rotating speed of the movable disc (2);
the flow port A (6) and the flow port B (7) which are communicated with the movable and static cavity (1) are arranged on the shell (5), the flow port A (6) and the flow port B (7) are connected to the water tank (17) through pipelines, a booster pump A (18-1), a flow meter (19) and a pressure sensor A (20-1) are arranged on a pipeline between the flow port A (6) and the water tank (17), a booster pump B (18-2) and a pressure sensor B (20-2) are arranged on a pipeline between the flow port B (7) and the water tank (17), the pressure sensor A (20-1), the pressure sensor B (20-2), the flow meter A (19-1) and the flow meter B (19-2) are used for measuring the pressure and the flow of the flow port A (6) and the flow port B (7) which are connected with the movable and static cavity (1), the booster pump A (18-, The booster pump B (18-2) controls the flow rate in the static cavity (1);
the pressure measuring pipe (13) penetrates through the shell (5) and the static disc (3), one end of the pressure measuring pipe is connected with the pressure sensor C (20-3), and the other end of the pressure measuring pipe is used for contacting fluid on the inner wall surface of the static disc (3) and measuring the fluid pressure on the inner wall surface of the static disc (3);
the handle C (12) penetrates through the shell (5) and is connected with the static disc (3), the handle C (12) is connected with the shell (5) in a threaded rotary mode, a threaded through hole C is formed in the shell (5), an external thread matched with the threaded through hole C is formed in the outer wall of the handle C (12), the handle C (12) is screwed in the threaded through hole C, the handle C (12) is rotated, the handle C (12) extends into or out of the shell (5) to control the axial position of the static disc (3), and the handle C (12) is provided with a handle C;
the centrifugal through-flow pre-rotation device is characterized in that a handle rod A (9) and a movable guide vane A (8) are arranged on the side wall of a through-flow port A (6), a handle A is arranged on the handle rod A (9), the handle rod A (9) is in threaded connection with the side wall of the through-flow port A (6), a threaded through hole A is formed in the side wall of the through-flow port A (6), external threads matched with the threaded through hole A are formed in the outer wall of the handle rod A (9), the handle rod A (9) is screwed in the threaded through hole A, the handle rod A (9) penetrates through the side wall of the through-flow port A (6) and is connected with the movable guide vane A (8), the handle rod A (9) is rotated, and the centrifugal through-;
be equipped with handle bar B (11) and movable guide vane B (10) on the lateral wall of through-flow mouth B (7), be equipped with handle B on handle bar B (11), handle bar B (11) connect with the lateral wall screw thread of through-flow mouth B (7) soon and are connected, be equipped with screw through-hole B on the lateral wall of through-flow mouth B (7), be equipped with on the outer wall of handle bar B (11) with screw through-hole B assorted external screw thread, handle bar B (11) revolve in screw through-hole B, handle bar B (11) pass the lateral wall of through-flow mouth B (7) and link to each other with movable guide vane B (10), rotary handle bar B (11), through movable guide vane B (10) control centripetal through-flow prewhirl angle.
2. The multiparameter multifunctional dynamic and static cavity experiment table as claimed in claim 1, wherein the booster pump A (18-1), the flow meter (19) and the pressure sensor A (20-1) are sequentially arranged from one end of a pipeline connected with the water tank (17) to one end of a pipeline connected with the through-flow port A (6);
the booster pump B (18-2) and the pressure sensor B (20-2) are sequentially arranged from one end of a pipeline connected with the water tank (17) to one end of a pipeline connected with the through-flow port B (7).
3. The multiparameter multifunctional dynamic and static cavity experiment table as claimed in claim 1, wherein the movable guide vanes B (10) are uniformly distributed in the circumferential direction, and the number of the movable guide vanes B is not less than 12; the movable guide vanes A (8) are uniformly distributed in the circumferential direction, and the number of the movable guide vanes A is not less than 3.
4. A multiparameter multifunctional dynamic static cavity experiment table as claimed in claim 1, wherein the pressure measuring pipe (13) is a telescopic pipe, and when the axial position of the static disc (3) is adjusted, one end of the pressure measuring pipe (13) is kept flush with the inner wall surface of the static disc (3).
5. The multiparameter multifunctional dynamic static cavity experiment table as claimed in claim 1, wherein the static disc (3), the annular baffle (4), the shell (5) and the movable guide vane B (10) are all made of transparent materials.
6. A multiparameter multifunctional dynamic static cavity experiment table as claimed in claim 1, wherein the radial gap between the static disc (3) and the ring baffle (4), the interface between the handle a (9) and the housing (5), the interface between the handle B (11) and the housing (5), the interface between the handle bar C (12) and the housing (5), and the interface between the pressure measuring tube (13) and the housing (5) are sealed.
7. The multiparameter multifunctional dynamic and static cavity experiment table as claimed in claim 1, wherein the through-flow port A (6) faces downwards and is used for researching liquid flow of the dynamic and static cavities (1), the torque and the axial force of the dynamic disk (2) are measured in a dry mode, the torque and the axial force of the dynamic disk (2) are measured in a wet mode, and the torque and the axial force of the wet surface of the dynamic disk (2) are obtained by subtracting the torque and the axial force of the dynamic disk (2); the through flow port A (6) can be used for gas flow research of the dynamic and static cavities (1) in any direction.
8. A multiparameter, multifunctional dynamic and static chamber laboratory bench according to claim 1, wherein the dynamic disk (2) and the housing (5) are in clearance fit in the radial direction, and the clearance value is not more than 1 mm.
9. The multiparameter multifunctional dynamic and static cavity experiment table as claimed in claim 1, wherein when the through-flow port A (6) is a through-flow inlet, the through-flow port B (7) is a through-flow outlet, and the movable guide vane B (10) is chordwise centripetal, the handle rod A (9) and the movable guide vane A (8) are adjusted to study the influence of centrifugal through-flow and through-flow pre-rotation angles on the internal and external characteristics of the dynamic and static cavity (1); when the through flow port A (6) is a through flow outlet, the through flow port B (7) is a through flow inlet and the movable guide vane A (8) is radial and centripetal, the handle B (11) and the movable guide vane B (10) are adjusted to study the influence of centripetal flow and the through flow prerotation angle on the internal and external characteristics of the movable and static cavities (1).
10. A multiparameter multifunctional dynamic and static cavity experiment table as claimed in claim 1, wherein the through-flow port a (6) and the through-flow port B (7) are closed, the experiment of the closed dynamic and static cavity (1) is carried out, the torques at different width-diameter ratios and reynolds numbers are measured, and the dimensionless treatment of the torques is carried out by using the following formula:
Figure FDA0002562257750000031
in the formula, CmIs the dimensionless torque of the movable disc (2), T is the torque of the movable disc (2), rho is the fluid density, omega is the angular velocity of the movable disc (2), b is the axial width of the movable and static cavities (1);
in order to establish a formula of dimensionless torque about the ratio of width to diameter and Reynolds number, fitting the following formula by using a nonlinear least square method, and determining undetermined coefficients m, n and l:
Figure FDA0002562257750000032
wherein G is the width ratio (G ═ b/R) of the dynamic and static cavities (1),
Figure FDA0002562257750000033
is Reynolds number of the dynamic and static cavities (1)
Figure FDA0002562257750000034
R is the radius of the movable disc (2), and upsilon is the kinematic viscosity of the fluid.
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