CN113504260A - Experimental device for be used for rotor oil spout heat convection test - Google Patents
Experimental device for be used for rotor oil spout heat convection test Download PDFInfo
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- CN113504260A CN113504260A CN202110660315.9A CN202110660315A CN113504260A CN 113504260 A CN113504260 A CN 113504260A CN 202110660315 A CN202110660315 A CN 202110660315A CN 113504260 A CN113504260 A CN 113504260A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The embodiment of the invention discloses an experimental device for a rotor oil injection convective heat transfer test, which relates to the technical field of aviation motor cooling and comprises the following components: the heating tube heats the copper block, lubricating oil sprayed by the rotating shaft is sprayed on the surface of the copper block, the thermocouple is used for measuring the internal temperature of the copper block, the temperature measured by the thermocouple is different from the temperature of the oil spraying surface, mathematical correction needs to be carried out by using a temperature coefficient, and the correct convective heat transfer coefficient is obtained. Therefore, the effect of the oil injection cooling of the rotor under different working conditions can be rapidly tested, the experimental process is simplified, and the experimental efficiency of experimenters is improved.
Description
Technical Field
The invention relates to the technical field of cooling of aviation motors, in particular to research on oil injection convective heat transfer of a rotor, and particularly relates to an experimental device for testing the oil injection convective heat transfer of the rotor.
Background
With the rapid development of science and technology, the demand of human society for energy is increasing, the energy supplied by the traditional motor is not enough to meet the demand of social development, and a novel motor with higher power density and larger starting torque is urgently needed. However, with the improvement of the performance such as power density, the problems of increased motor loss, excessive temperature rise and the like are inevitably caused, so that the heat dissipation problem of the motor needs to be deeply researched to ensure the safe operation of the motor.
The traditional cooling mode is wind cooling and water cooling, wherein the heat dissipation capacity of the wind cooling is lower, and the water cooling can not adapt to the cooling demand of the high-speed aviation motor due to the conductivity and corrosivity of water per se, and only the oil cooling mode can meet the cooling demand of the aviation motor due to the unique operating environment. The common oil cooling mode is oil injection cooling, the oil injection cooling belongs to direct cooling, lubricating oil is in direct contact with a winding, and the lubricating oil has good insulating property and high heat dissipation rate, so that the oil injection cooling cannot influence the operation of the motor, the temperature rise in the motor can be obviously reduced, and the power density of the motor is improved. The oil injection cooling of the rotor refers to that lubricating oil is introduced into a hollow shaft of the motor, and the lubricating oil in the shaft is injected to the stator and the winding by utilizing the centrifugal force of the rotating shaft when the motor rotates, so that the temperature rise of the motor is reduced.
However, under different flow rates and different rotation speeds, the realization conditions of the oil injection cooling of the rotor are different, multiple or even exhaustive tests are required, a large amount of experimental time and labor hours of research and development personnel are required, and a large amount of time and energy are consumed in laboratory research and retest of actual production.
Disclosure of Invention
The embodiment of the invention provides an experimental device for a rotor oil injection convective heat transfer test, which can be used for rapidly testing the effect of rotor oil injection cooling under different working conditions, thereby simplifying the experimental process and improving the experimental efficiency of experimenters.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the device comprises an oil pump (1), a screwing valve (2), a pressure gauge (3), a flow meter (4), a convective heat transfer coefficient testing device (5), a prime motor (6) and a rack (7). The oil pump (1) is used for providing lubricating oil, a lubricating oil outlet of the oil pump (1) is connected with a lubricating oil inlet of the screwing valve (2), a lubricating oil outlet of the screwing valve (2) is connected to a lubricating oil inlet of the flowmeter (4), a lubricating oil outlet of the flowmeter (4) is connected to an oil inlet of the convective heat transfer coefficient testing device (5), and an oil outlet of the convective heat transfer coefficient testing device (5) is connected to a lubricating oil inlet of the oil pump (1). The oil pump (1), the screwing valve (2), the flowmeter (4) and the convective heat transfer coefficient testing device (5) are sequentially connected in series through one section of fluid pipeline, the convective heat transfer coefficient testing device (5) leads out the other section of fluid pipeline to be connected with the oil pump (1), and the oil pump (1) is provided with the pressure gauge (3) on the fluid pipeline between the screwing valve (2). The prime motor (6) and the convective heat transfer coefficient testing device (5) are arranged on the rack (7), and the prime motor (6) and the convective heat transfer coefficient testing device (5) are coaxially connected through a bearing (10).
Wherein, the flow heat transfer coefficient test device (5) comprises: the device comprises a shell (8), an end cover (9), a bearing (10), a hollow shaft (11), an oil spray hole (12), a stepping motor (14), a moving platform (16) and a convective heat transfer coefficient test block (17). An electric sliding rail is installed on the inner wall of the top of the machine shell (8), a moving platform (16) is installed on the electric sliding rail, and a convective heat transfer coefficient testing block (17) is installed on the moving platform (16). A hollow shaft (11) is installed on the inner wall of the bottom of the casing (8), an oil injection hole (12) is formed in the hollow shaft (11), and the injection direction of the oil injection hole (12) faces the convective heat transfer coefficient testing block (17). The stepping motor (14) and the ball screw (15) form the electric slide rail. The moving platform (16) and the convective heat transfer coefficient testing block (17) are driven by controlling the stepping motor (14) to move in the horizontal direction along the ball screw (15). The side walls of two sides of the machine shell (8) are end covers (9), the bottom of each end cover (9) is provided with a mounting hole, and the bearing (10) penetrates through the mounting holes.
An oil thrower (13) is arranged at the nozzle of the oil spray hole (12). When the experimental device works, the centrifugal force generated by the rotation of the hollow shaft (11) enables the cooling oil conveyed in the hollow shaft (11) to be sprayed out from the nozzle of the oil spray hole (12), and the sprayed cooling oil is sprayed on the convective heat transfer coefficient test block (17) through the oil slinger (13). The convective heat transfer coefficient test block (17) comprises: copper block (18), thermocouple (19), heating tube (20), thermal-insulated support (21) and thermal-insulated cotton (22). The heating tube (20) is used for heating the copper block (18), the thermocouple (19) is used for measuring the temperature of the surface of the copper block (18), and lubricating oil is sprayed on the surface of the copper block (18). A thermocouple (19) and two heating tubes (20) are inserted into the copper block (18), and a heat insulation support (21) is placed into the copper block (18). And heat insulation cotton (22) is filled in a gap between the copper block (18) and the heat insulation support (21), and the outer ring of the heat insulation support (21) is wrapped with the heat insulation cotton (22).
According to the experimental device for the oil injection convective heat transfer test of the rotor, provided by the embodiment of the invention, the heating pipe heats the copper block, lubricating oil sprayed by the rotating shaft is sprayed on the surface of the copper block, the thermocouple is used for measuring the internal temperature of the copper block, the temperature measured by the thermocouple is different from the temperature of an oil injection surface, and the temperature coefficient is required to be mathematically corrected to obtain the correct convective heat transfer coefficient. Therefore, the effect of the oil injection cooling of the rotor under different working conditions can be rapidly tested, the experimental process is simplified, and the experimental efficiency of experimenters is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a structural diagram of a rotor oil injection convective heat transfer coefficient test experiment system of the invention;
FIG. 2 is a schematic structural diagram of an experimental apparatus for testing convective heat transfer coefficient of oil injection of a rotor according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a convective heat transfer coefficient test block provided by an embodiment of the present invention;
FIG. 4 is a cloud diagram of temperature distribution of a test block in an oil injection experiment provided by an embodiment of the invention;
FIG. 5 is a thermal model calculation result of finite element analysis provided by an embodiment of the present invention.
The various reference numbers in the drawings respectively represent: 1-an oil pump, 2-a screwed valve, 3-a pressure gauge, 4-a flow meter, 5-a convective heat transfer coefficient testing device, 6-a prime motor, 7-a rack, 8-a machine shell, 9-an end cover, 10-a bearing, 11-a hollow shaft, 12-an oil spray hole, 13-an oil thrower, 14-a stepping motor, 15-a ball screw, 16-a moving platform, 17-a convective heat transfer coefficient testing block, 18-a copper block, 19-a thermocouple, 20-a heating tube, 21-a heat insulation bracket and 22-heat insulation cotton.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The design objective of this embodiment is to provide an effective experimental tool for exploring the cooling effect of the rotor oil spray cooling scheme, so as to facilitate the research of comparing the effect of the rotor oil spray cooling by calculating the convective heat transfer coefficient at different flow rates and different rotation speeds.
The main design idea of this embodiment lies in: the convection heat transfer coefficients at different oil injection positions and different oil injection flow rates can be measured by controlling the electric slide rail of the stepping motor to move and utilizing the convection heat transfer coefficient testing block.
The embodiment of the invention provides an experimental device for a rotor oil injection convective heat transfer test, as shown in fig. 1, comprising:
the device comprises an oil pump (1), a screwing valve (2), a pressure gauge (3), a flow meter (4), a convective heat transfer coefficient testing device (5), a prime motor (6) and a rack (7).
The oil pump (1) is used for providing lubricating oil, a lubricating oil outlet of the oil pump (1) is connected with a lubricating oil inlet of the screwing valve (2), a lubricating oil outlet of the screwing valve (2) is connected to a lubricating oil inlet of the flowmeter (4), a lubricating oil outlet of the flowmeter (4) is connected to an oil inlet of the convective heat transfer coefficient testing device (5), and an oil outlet of the convective heat transfer coefficient testing device (5) is connected to a lubricating oil inlet of the oil pump (1).
The oil pump (1), the screwing valve (2), the flowmeter (4) and the convective heat transfer coefficient testing device (5) are sequentially connected in series through one section of fluid pipeline, the convective heat transfer coefficient testing device (5) leads out the other section of fluid pipeline to be connected with the oil pump (1), and the oil pump (1) is provided with the pressure gauge (3) on the fluid pipeline between the screwing valve (2).
The prime motor (6) and the convective heat transfer coefficient testing device (5) are arranged on the rack (7), and the prime motor (6) and the convective heat transfer coefficient testing device (5) are coaxially connected through a bearing (10).
Specifically, as shown in fig. 1, the structure diagram includes: the device comprises an oil pump (1), a screwing valve (2), a pressure gauge (3), a flow meter (4), a convective heat transfer coefficient testing device (5), a prime motor (6) and a rack (7). The oil pump (1) provides lubricating oil required by the system, the lubricating oil flows from a lubricating oil outlet of the oil pump (1) to a lubricating oil inlet of the screwing valve (2) through a fluid pipeline, a lubricating oil outlet of the screwing valve (2) is connected to a lubricating oil inlet of the flowmeter (4) through a fluid pipeline, a lubricating oil outlet of the flowmeter (4) is connected to an oil inlet of the convective heat transfer coefficient testing device (5), and an oil outlet of the convective heat transfer coefficient testing device (5) is connected to a lubricating oil inlet of the oil pump (1) through a fluid pipeline. The prime motor (6) is coaxially connected with the convective heat transfer coefficient testing device (5), is arranged on the same rack (7), and drives the rotating shaft of the convective heat transfer coefficient testing device (5) to rotate by driving the prime motor (6) so as to spray oil to the rotor. After the experimental device is started and an experiment is started, lubricating oil flows out of the oil pump (1), flows to the flow meter (4) through the screwing valve (2), measures the flow of the lubricating oil flowing into the convective heat transfer coefficient testing experimental device (5), and flows back to the oil pump (1) again from the lubricating oil flowing out of the convective heat transfer coefficient testing experimental device (5). The prime motor (6) is coaxially connected with the convective heat transfer coefficient test experimental device (5), is arranged on the same rack (7), and drives the convective heat transfer coefficient test experimental device (5) to work by driving the prime motor (6).
In this embodiment, the flow heat transfer coefficient test apparatus (5) includes: the device comprises a shell (8), an end cover (9), a bearing (10), a hollow shaft (11), an oil spray hole (12), a stepping motor (14), a moving platform (16) and a convective heat transfer coefficient test block (17). An electric slide rail is installed on the inner wall of the top of the machine shell (8), the moving platform (16) is installed on the electric slide rail, and a convective heat transfer coefficient testing block (17) is installed on the moving platform (16). A hollow shaft (11) is installed on the inner wall of the bottom of the casing (8), an oil injection hole (12) is formed in the hollow shaft (11), and the injection direction of the oil injection hole (12) faces the convective heat transfer coefficient testing block (17).
Wherein, the stepping motor (14) and the ball screw (15) form an electric slide rail. The moving platform (16) and the convective heat transfer coefficient testing block (17) are driven by controlling the stepping motor (14) to move along the ball screw (15) in the horizontal direction. The lateral walls of the two sides of the machine shell (8) are end covers (9), the bottom of each end cover (9) is provided with a mounting hole, and the bearing (10) penetrates through the mounting holes.
In this embodiment, an oil thrower (13) is installed at a nozzle of the oil jet (12). When the experimental device works, the centrifugal force generated by the rotation of the hollow shaft (11) enables the cooling oil conveyed in the hollow shaft (11) to be sprayed out from the nozzle of the oil spray hole (12), and the sprayed cooling oil is sprayed on the convective heat transfer coefficient test block (17) through the oil slinger (13). Specifically, the hollow shaft (11) can spray the lubricating oil from the oil spray hole (12) through centrifugal force in the operation process, the lubricating oil can be uniformly sprayed on the convective heat transfer coefficient test block (17) through the oil thrower disc (13), the convective heat transfer coefficient test block (17) can move in the horizontal direction along with the moving platform, and the convective heat transfer coefficients of rotor oil spray cooling at different positions are measured.
For example: FIG. 2 is a test experimental device for oil injection convective heat transfer coefficient of a rotor, which comprises: the device comprises a shell (8), an end cover (9), a bearing (10), a hollow shaft (11), an oil injection hole (12), an oil thrower (13), a stepping motor (14), a ball screw (15), a moving platform (16) and a convective heat transfer coefficient testing block (17). The device comprises a stepping motor (14) which is arranged on the upper part of a shell (8), an electric slide rail, a convective heat transfer coefficient testing block (17) which is arranged on a moving platform (16), a hollow shaft (11) which is provided with an oil injection hole (12), and an oil thrower (13) which is arranged on the oil injection hole (12), wherein the oil thrower (13) can be omitted. The hollow shaft (11) can spout the lubricating oil from the oil spout hole (12) through centrifugal force in the operation process, can spray the lubricating oil evenly on convective heat transfer coefficient test block (17) through oil thrower dish (13), convective heat transfer coefficient test block (17) can move along with moving platform in the horizontal direction, survey different positions department rotor oil spout refrigerated convective heat transfer coefficient. The stepping motor (14), the ball screw (15) and the mobile platform (16) form a whole and are electric sliding rails, the electric sliding rails are fixed at the top of the shell (8), the convective heat transfer coefficient testing block (17) is connected with the mobile platform (16), and the mobile platform (16) and the convective heat transfer coefficient testing block (17) are driven to move in the horizontal direction by controlling the stepping motor (14). The hollow shaft (11) is provided with an oil spraying hole (12), the oil thrower disc (13) is connected with the oil spraying hole (12), cooling oil flows in the hollow shaft (11), when the rotor oil spraying convective heat transfer coefficient test experimental device works, the centrifugal force generated by rotation of the hollow shaft (11) sprays the cooling oil from the oil spraying hole (12), and the sprayed cooling oil can be uniformly sprayed on the convective heat transfer coefficient test block (17) through the oil thrower disc (13). Wherein the oil slinger (13) may be omitted.
Specifically, the convective heat transfer coefficient test block (17) comprises: copper block (18), thermocouple (19), heating tube (20), thermal-insulated support (21) and thermal-insulated cotton (22). The heating tube (20) is used for heating the copper block (18), the thermocouple (19) is used for measuring the temperature of the surface of the copper block (18), and lubricating oil is sprayed on the surface of the copper block (18). The temperature measured by the thermocouple (19) is different from the temperature of the oil injection surface, and the temperature coefficient is required to be used for mathematical correction to obtain the correct convective heat transfer coefficient.
A thermocouple (19) and two heating tubes (20) are inserted into the copper block (18), and a heat insulation support (21) is placed into the copper block (18). And heat insulation cotton (22) is filled in a gap between the copper block (18) and the heat insulation support (21), and the outer ring of the heat insulation support (21) is wrapped with the heat insulation cotton (22). In a preferable scheme, the heat insulation support (21) is made of polytetrafluoroethylene materials.
For example: FIG. 3 is a cross-sectional view of a convective heat transfer coefficient test block of the present invention, the apparatus comprising: copper block (18), thermocouple (19), heating tube (20), heat insulating support (21), thermal-insulated cotton (22). A thermocouple (19) and two heating tubes (20) are inserted into a copper block (18), the copper block (18) is placed into a heat insulation support (21) to fix the copper block (18), the heat insulation support (21) is made of polytetrafluoroethylene, heat insulation cotton (22) is filled in a gap between the copper block (18) and the heat insulation support (21), and the outer ring of the heat insulation support (21) is wrapped with the heat insulation cotton (22) to insulate heat.
In practical application, Ansys finite element software can be used for carrying out simulation analysis on the convective heat transfer coefficient test block, and the output power of the heating tube is set to be 0.05W/m3The ambient temperature is 22 ℃, the oil injection surface convection heat transfer coefficient is 0.004W/mm2Temperature heat insulating material convection heat transfer coefficient 10-7W/mm2Temperature. The simulation results are shown in fig. 4. As can be seen from FIG. 4, a part of the heat is dissipated from the heat insulating material, only 89.6% of the heat is dissipated from the oil injection surface, and the percentage of the heat dissipated from the oil injection surface is set as the heat preservation coefficient kq. The output power of the heating tube was changed, and the thermocouple temperatures at different heating tube powers were recorded, respectively, and the obtained simulation calculation results are shown in fig. 5. As can be seen from the figure, the temperature of the radiating surface is in direct proportion to the temperature measured by the thermocouple, the proportion relation is 93%, and the proportion is set as the temperature measurement coefficient.
By utilizing the heat preservation coefficient and the temperature measurement coefficient, the convective heat transfer coefficient can be obtained by the following formula:
wherein h isjetIs the convective heat transfer coefficient of the oil injection surface; sconIs the area of the oil spray contact surface; t isoilIs the measured oil temperature; qheatIs the output power of the heating tube; t ismeaIs the measured temperature of the temperature sensor.
The embodiment designs an experimental device for measuring the convective heat transfer coefficient of oil injection cooling of a rotor, relates to the field of heat management of high-speed motors, and can guide the design of the heat cooling of the motors. The invention comprises the following steps: the heating tube heats the copper block, lubricating oil sprayed by the rotating shaft is sprayed on the surface of the copper block, the thermocouple is used for measuring the internal temperature of the copper block, the temperature measured by the thermocouple is different from the temperature of the oil spraying surface, mathematical correction needs to be carried out by using a temperature coefficient, and the correct convective heat transfer coefficient is obtained.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an experimental apparatus for be used for rotor oil spout heat convection test, its characterized in that includes: the device comprises an oil pump (1), a screwed valve (2), a pressure gauge (3), a flow meter (4), a convective heat transfer coefficient testing device (5), a prime motor (6) and a rack (7);
the oil pump (1) is used for providing lubricating oil, a lubricating oil outlet of the oil pump (1) is connected with a lubricating oil inlet of the screwing valve (2), a lubricating oil outlet of the screwing valve (2) is connected to a lubricating oil inlet of the flowmeter (4), a lubricating oil outlet of the flowmeter (4) is connected to an oil inlet of the convective heat transfer coefficient testing device (5), and an oil outlet of the convective heat transfer coefficient testing device (5) is connected to a lubricating oil inlet of the oil pump (1);
the system comprises an oil pump (1), a screwing valve (2), a flowmeter (4) and a convective heat transfer coefficient testing device (5), wherein the oil pump (1), the screwing valve (2), the flowmeter (4) and the convective heat transfer coefficient testing device (5) are sequentially connected in series through a section of fluid pipeline, the convective heat transfer coefficient testing device (5) leads out another section of fluid pipeline to be connected with the oil pump (1), and a pressure gauge (3) is arranged on the fluid pipeline between the oil pump (1) and the screwing valve (2);
the prime motor (6) and the convective heat transfer coefficient testing device (5) are arranged on the rack (7), and the prime motor (6) and the convective heat transfer coefficient testing device (5) are coaxially connected through a bearing (10).
2. Experimental setup for rotor oil injection convective heat transfer test according to claim 1, characterized in that the convective heat transfer coefficient test setup (5) comprises: the device comprises a shell (8), an end cover (9), a bearing (10), a hollow shaft (11), an oil injection hole (12), a stepping motor (14), a moving platform (16) and a convective heat transfer coefficient test block (17);
an electric sliding rail is arranged on the inner wall of the top of the shell (8), a moving platform (16) is arranged on the electric sliding rail, and a convective heat transfer coefficient testing block (17) is arranged on the moving platform (16);
a hollow shaft (11) is installed on the inner wall of the bottom of the casing (8), an oil injection hole (12) is formed in the hollow shaft (11), and the injection direction of the oil injection hole (12) faces the convective heat transfer coefficient testing block (17).
3. The experimental device for the oil injection convective heat transfer test of the rotor as recited in claim 2, wherein the stepping motor (14) and the ball screw (15) form the electric slide rail;
the moving platform (16) and the convective heat transfer coefficient testing block (17) are driven by controlling the stepping motor (14) to move in the horizontal direction along the ball screw (15).
4. The experimental device for the rotor oil injection convective heat transfer test is characterized in that the side walls of the two sides of the casing (8) are end covers (9), the bottom of each end cover (9) is provided with a mounting hole, and the bearing (10) penetrates through the mounting holes.
5. The experimental device for the rotor oil injection convective heat transfer test according to any one of claims 1 to 4, characterized in that an oil thrower (13) is installed at the nozzle of the oil injection hole (12);
when the experimental device works, the centrifugal force generated by the rotation of the hollow shaft (11) enables the cooling oil conveyed in the hollow shaft (11) to be sprayed out from the nozzle of the oil spray hole (12), and the sprayed cooling oil is sprayed on the convective heat transfer coefficient test block (17) through the oil slinger (13).
6. Experimental device for rotor oil spout convective heat transfer test of claim 5, characterized in that convective heat transfer coefficient test block (17) includes: the device comprises a copper block (18), a thermocouple (19), a heating tube (20), a heat insulation support (21) and heat insulation cotton (22);
the heating tube (20) is used for heating the copper block (18), the thermocouple (19) is used for measuring the temperature of the surface of the copper block (18), and lubricating oil is sprayed on the surface of the copper block (18).
7. The experimental device for the rotor oil injection convective heat transfer test is characterized in that a thermocouple (19) and two heating pipes (20) are inserted into a copper block (18), and the copper block (18) is placed into a heat insulation bracket (21);
and heat insulation cotton (22) is filled in a gap between the copper block (18) and the heat insulation support (21), and the outer ring of the heat insulation support (21) is wrapped with the heat insulation cotton (22).
8. The experimental device for the rotor oil injection convective heat transfer test is characterized in that the heat insulation support (21) is made of polytetrafluoroethylene materials.
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