CN218546136U - Become oar bearing testing machine based on internal force method - Google Patents
Become oar bearing testing machine based on internal force method Download PDFInfo
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- CN218546136U CN218546136U CN202222813067.XU CN202222813067U CN218546136U CN 218546136 U CN218546136 U CN 218546136U CN 202222813067 U CN202222813067 U CN 202222813067U CN 218546136 U CN218546136 U CN 218546136U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model belongs to the technical field of bearing detection, a variable-pitch bearing testing machine based on an internal force method is provided, which comprises an upper layer loading oil cylinder, a floating hexagon body, an oil cylinder pin, a loading disc, a simulation paddle root, a test bearing, an accompanying test bearing, a simulation paddle root connecting piece, a hub base, a lower layer loading oil cylinder and an oblique loading oil cylinder; a plurality of connecting ports are arranged on the simulated blade root connecting piece at equal angular intervals; one end of the root of the simulation blade is connected with a connecting port on a connecting piece of the root of the simulation blade through a test bearing, and the other end of the root of the simulation blade is sleeved with a loading disc through an accompanying test bearing; the floating hexagonal body and the hub base are respectively arranged at two ends of the connecting piece for simulating the root of the blade; the upper loading oil cylinder is respectively connected with the floating hexagonal body and the loading disc through oil cylinder pins, and the lower loading oil cylinder and the inclined loading oil cylinder are respectively connected with the hub base and the loading disc through oil cylinder pins. The utility model discloses a principle is supported each other to the interact internal force, saves most frame, can satisfy various loading modes simultaneously.
Description
Technical Field
The utility model relates to a bearing detects technical field, especially relates to a become oar bearing testing machine based on internal force method.
Background
The wind driven generator has a severe operating environment, the variable pitch bearing is used as a key part of a variable pitch system and is directly connected with the blade, and the borne load is extremely complex. The existing fan variable-pitch bearing experimental device in China is simple in simulation of the service life, the loading state, the loading form and the like of the variable-pitch bearing, only a single loading form is considered, and great limitation exists, for example, in a patent CN106017934A and a patent CN205898456U, although specific implementation devices are different, the simulation of the actual loading condition of the bearing is realized by loading a single radial force and a single axial force, and the simulation has limitation.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses an internal force method provides a become oar bearing testing machine based on internal force method and application method thereof, can carry out the experiments such as deformation measurement and relative deformation measurement, the pressure measurement of lubricating oil or lubricating grease between wheel hub and wheel hub bearing under multiple operating mode.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a variable-pitch bearing testing machine based on an internal force method comprises an upper loading part, a hub bearing mounting part and a testing machine base part; the upper loading part comprises an upper loading oil cylinder 1, a floating hexagonal body 2 and an oil cylinder pin 11; the hub bearing mounting part comprises a loading disc 3, a simulated blade root 4, a test bearing 5, an accompanying test bearing 6 and a simulated blade root connecting piece 7; the testing machine base part comprises a hub base 8, a lower layer loading oil cylinder 9, an oblique loading oil cylinder 10 and an oil cylinder pin 11; a plurality of connectors are arranged on the simulated blade root connecting piece 7 at equal angular intervals; one end of the simulated blade root 4 is connected with a connecting port on a simulated blade root connecting piece 7 through a test bearing 5, and the other end is sleeved with the loading disc 3 through an accompanying test bearing 6; the floating hexagonal body 2 is arranged at one end of a simulated blade root connecting piece 7; the upper loading oil cylinder 1 is respectively connected with the floating hexagonal body 2 and the loading disc 3 through an oil cylinder pin 11; the hub base 8 is arranged at the other end of the simulated blade root connecting piece 7, and the lower layer loading oil cylinder 9 and the inclined loading oil cylinder 10 are respectively connected with the hub base 8 and the loading disc 3 through oil cylinder pins 11; the lower layer loading oil cylinder 9 is positioned above the inclined loading oil cylinder 10. Wherein the test bearing 5 is arranged between the simulated blade root 4 and the simulated blade root connecting piece 7, and the test-accompanying bearing 6 is arranged between the loading disc 3 and the simulated blade root 4.
The number of the upper layer loading oil cylinder 1, the lower layer loading oil cylinder 9 and the inclined loading oil cylinder 10 is 6, and the oil cylinder pin 11 is matched with the loading oil cylinder; the number of the connecting ports on the simulated blade root connecting piece 7, the simulated blade root 4 and the loading disc 3 is 3, and the test bearing 5 and the test-accompanying bearing 6 are used according to actual requirements; the upper layer loading oil cylinder 1 is uniformly distributed on three nonadjacent side surfaces of the floating hexagonal body 2; the lower layer loading oil cylinder 9 and the oblique loading oil cylinder 10 are uniformly distributed on the side surface of the hub base 8.
In the hub bearing mounting part, one or two of the test bearings 5 and the test-accompanying bearings 6 on the simulated blade root 4 are replaced by flanges for testing the hub bearing in two directions or one direction.
A use method of a variable-pitch bearing testing machine based on an internal force method comprises the following specific steps: when in work, the upper loading oil cylinder 1 applies thrust F 1 The lower layer loading oil cylinder 9 applies force F 2 The slant loading cylinder 10 applies a pulling force F 3 Then, the overturning moment M of the test bearing 5 is obtained by the following formula:
M＝F 1 ×L 1 +F 2 ×L 2 +F 3 ×L 3
wherein L is 1 ，L 2 ，L 3 Respectively apply thrust F to the upper loading oil cylinder 1 The linear distance from the action point to the center of the simulated blade root connecting piece 7, and the lower layer loading oil cylinder applies force F 2 The straight line distance from the action point to the center of the connecting piece 7 simulating the root of the blade, and the oblique loading oil cylinder applies a pulling force F 3 The linear distance from the action point to the center of the simulated blade root connecting piece 7;
axial force Fa of test bearing 5 through F 1 ，F 2 ，F 3 And M is calculated;
Fa＝F 1 -F 2 -F 3 ×cosα
the radial force Fr of the test bearing 5 is obtained by the following formula:
Fr＝F 3 ×sinα
wherein alpha is an included angle between the oblique loading oil cylinder 10 and the lower layer loading oil cylinder 9.
During operation, the upper layer loading oil cylinder 1 acts on the floating hexagonal body 2 through interaction, the acting force of the upper layer loading oil cylinder 1 counteracts each other, and the acting force of the lower layer loading oil cylinder 9 acts on the hub base 8 and counteracts each other.
The utility model has the advantages that: the utility model discloses become oar bearing testing machine based on internal force method when concrete operation, the internal force that has adopted the interact offsets mutually, has consequently saved most frame, presses simultaneously the effort of hydro-cylinder mounting means can satisfy the various loading modes of the biggest 20MW oar bearing that becomes. In addition, this change oar bearing testing machine based on internal force method except can carrying out the wheel hub bearing experiment of three directions simultaneously, can also experiment the wheel hub bearing of one of them direction or the wheel hub bearing of two directions, and the available flange of two other directions or one direction replaces the bearing, can significantly reduce the experimental volume of bearing like this to reduce the experiment cost. On the premise of the experiment of the variable-pitch bearing testing machine based on the internal force method, any directions can be tested as long as the balance of acting force is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of a pitch bearing testing machine based on an internal force method;
FIG. 2 is a partial schematic view of a hub bearing mounting portion of the present invention;
fig. 3 is a schematic view of a part of the testing machine base of the present invention.
In the figure: 1-upper layer loading oil cylinder; 2-a floating hexagon; 3-loading a disc; 4-simulating the root of the blade; 5-testing the bearing; 6-accompanying the test of the bearing; 7-simulation blade root attachment; 8-a hub base; 9-lower layer loading oil cylinder; 10-oblique loading oil cylinder; 11-cylinder pin.
Detailed Description
In order to make the person skilled in the art better understand the present invention, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
A schematic structural diagram according to an embodiment of the present disclosure is shown in the drawings. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and may be deviated from actual due to manufacturing tolerances or technical limitations.
A variable-pitch bearing testing machine based on an internal force method comprises an upper loading part, a hub bearing mounting part and a testing machine base part. When the variable pitch bearing testing machine based on the internal force method is designed according to a 20MW wheel hub, the average diameter size of the wheel hub is about 6000mm, and the weight is about 60-80 tons.
As shown in fig. 1, the upper layer loading part comprises an upper layer loading oil cylinder 1, a floating hexagonal body 2 and an oil cylinder pin 11.
During installation, 6 upper-layer loading oil cylinders 1 are uniformly distributed and connected on the floating hexagonal body 2 through oil cylinder pins 11. When the upper loading oil cylinder 1 interacts with each other, the acting force of the upper loading oil cylinder 1 acts on the floating hexagonal body 2 to counteract each other.
As shown in fig. 1 and 2, the hub bearing mounting portion includes a loading disc 3, a simulated blade root 4, a test bearing 5, an auxiliary test bearing 6, and a simulated blade root attachment 7. During installation, one end of the simulated blade root 4 is connected with the simulated blade root connecting piece 7, and the simulated blade root connecting piece 7 is installed below the floating hexagonal body 2. Wherein the test bearing 5 is arranged between the loading disc 3 and the other end of the simulated blade root part 4, and the test-accompanying bearing 6 is arranged between the simulated blade root part 4 and one end of the simulated blade root part connecting piece 7. The hub bearing installation part is divided into 3 groups, and the 3 groups are uniformly distributed and connected on the simulation blade root connecting piece 7. This change oar bearing testing machine based on internal force method except can carrying out the wheel hub bearing experiment of three direction simultaneously, can also experiment the wheel hub bearing of one of them direction or the wheel hub bearing of two directions, and the available flange of two other directions or a direction replaces the bearing, can the experimental volume of the bearing that significantly reduces like this to reduce the experiment cost.
As shown in fig. 2 and 3, the base part of the testing machine comprises a hub base 8, a lower layer loading cylinder 9, an inclined loading cylinder 10 and a cylinder pin 11. During installation, the hub base 8 is installed below the simulated blade root connecting piece 7, the 6 lower-layer loading oil cylinders 9 and the 6 inclined loading oil cylinders 10 are uniformly distributed and connected between the hub base 8 and the loading disc 3 through the oil cylinder pins 11, and acting forces of the lower-layer loading oil cylinders 9 act on the hub base 8 to offset each other. Thus, the design of a large base can be omitted, the total weight of the testing machine is greatly reduced, and the manufacturing cost is reduced.
As shown in fig. 1 and 3, the cylinder diameters of the upper layer loading cylinder 1, the lower layer loading cylinder 9 and the oblique loading cylinder 10 are all 600mm, the strokes are all about 1500mm, when the maximum oil pressure of the hydraulic station is 16MPa, the maximum overturning moment 85000KN · m, the radial load 500 tons (adjustable), the axial load 200 tons (adjustable) can be realized, the overturning moment direction is the windward direction of the fan, and the radial load is also the windward direction of the fan.
As shown in FIG. 1, the upper layer loading oil cylinder 1 applies a thrust F 1 The lower layer loading oil cylinder 9 applies a pulling force F 2 The slant loading cylinder 10 applies a pulling force F 3 Then, the overturning moment M of the test bearing 5 can be obtained by the following formula:
M＝F 1 ×L 1 +F 2 ×L 2 +F 3 ×L 3
wherein L is 1 ，L 2 ，L 3 Respectively apply thrust F to the upper loading oil cylinder 1 The lower layer of loading oil cylinder applies thrust F 2 The oblique loading oil cylinder applies a pulling force F 3 The straight line distance to the centre of the simulated blade root attachment 7.
Axial force Fa of test bearing 5 through F 1 ，F 2 ，F 3 And M is calculated;
Fa＝F 1 -F 2 -F 3 ×cosα
the radial force Fr of the test bearing 5 is obtained by the following formula:
Fr＝F 3 ×sinα
wherein alpha is an included angle between the oblique loading oil cylinder 10 and the lower layer loading oil cylinder 9.
As shown in fig. 1, in operation, after the pitch bearing testing machine based on the internal force method is installed, the upper-layer loading oil cylinder system is integrally hoisted to the testing machine and fixed through the oil cylinder pin hole. After the external of the variable-pitch bearing testing machine based on the internal force method is completely installed, a driving motor and a reduction gearbox in a wheel hub can be installed, then a load is applied to the variable-pitch bearing testing machine based on the internal force method, the application size of the load is generally a rated load, the specific load size can be set according to requirements of an experiment manufacturer, the motor can move in a swinging or rotating mode when running, and the movement time is also set by the manufacturer to carry out bearing service life experiments.
Because the fan factory tends to swing loading test more during the wheel hub bearing experiment, so this local driving motor adopts high-power servo motor, both can do the swing experiment like this and also can do the full gyration experiment, and the speed governing scope is wider simultaneously.
The test can be carried out at different rotating speeds and under different load effects, the deformation of the hub is measured, the relative deformation of the hub bearing is measured, the temperature rise of the hub bearing is measured, the pressure of lubricating oil or grease is measured, the stress is measured, the service life is prolonged, and the like.
Claims (3)
1. A variable pitch bearing testing machine based on an internal force method is characterized by comprising an upper loading part, a hub bearing mounting part and a testing machine base part; the upper loading part comprises an upper loading oil cylinder (1), a floating hexagonal body (2) and an oil cylinder pin (11); the hub bearing mounting part comprises a loading disc (3), a simulated blade root (4), a test bearing (5), an accompanying test bearing (6) and a simulated blade root connecting piece (7); the testing machine base part comprises a hub base (8), a lower layer loading oil cylinder (9), an oblique loading oil cylinder (10) and an oil cylinder pin (11); a plurality of connecting ports are arranged on the simulated blade root connecting piece (7) at equal angle intervals; one end of the simulated blade root (4) is connected with a connecting port on a simulated blade root connecting piece (7) through a test bearing (5), and the other end is sleeved with the loading disc (3) through an auxiliary test bearing (6); the floating hexagonal body (2) is arranged at one end of the simulated blade root connecting piece (7); the upper loading oil cylinder (1) is respectively connected with the floating hexagonal body (2) and the loading disc (3) through an oil cylinder pin (11); the hub base (8) is arranged at the other end of the simulated blade root connecting piece (7), and the lower layer loading oil cylinder (9) and the oblique loading oil cylinder (10) are respectively connected with the hub base (8) and the loading disc (3) through oil cylinder pins (11); the lower layer loading oil cylinder (9) is positioned above the oblique loading oil cylinder (10).
2. The variable-pitch bearing testing machine based on the internal force method according to claim 1, wherein the number of the upper loading oil cylinder (1), the lower loading oil cylinder (9) and the oblique loading oil cylinder (10) is 6; the number of the connecting ports on the simulated blade root connecting piece (7), the simulated blade root (4) and the loading disc (3) is 3; the upper loading oil cylinder (1) is uniformly distributed on three nonadjacent side surfaces of the floating hexagonal body (2); the lower layer loading oil cylinder (9) and the oblique loading oil cylinder (10) are uniformly distributed on the side surface of the hub base (8).
3. The pitch bearing testing machine based on the internal force method is characterized in that in the hub bearing mounting part, a test bearing (5) and an accompanying test bearing (6) on one or two simulated blade roots (4) are replaced by flanges for testing the hub bearing in two directions or one direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222813067.XU CN218546136U (en) | 2022-10-25 | 2022-10-25 | Become oar bearing testing machine based on internal force method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222813067.XU CN218546136U (en) | 2022-10-25 | 2022-10-25 | Become oar bearing testing machine based on internal force method |
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| Publication Number | Publication Date |
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| CN218546136U true CN218546136U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222813067.XU Active CN218546136U (en) | 2022-10-25 | 2022-10-25 | Become oar bearing testing machine based on internal force method |
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| CN (1) | CN218546136U (en) |
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- 2022-10-25 CN CN202222813067.XU patent/CN218546136U/en active Active
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