Static load loading test device and method for ocean platform lifting gear box

Abstract

The invention relates to an ocean platform lifting gear box static load loading test device and method. The loading device comprises a test bench, a lifting gear box, an input gear shaft, an input bearing seat, a first loading device with a first loading pressure head, a second loading device with a second loading pressure head and a limiting clamp. The lifting gear box, the input bearing seat and the limiting clamp are fixedly mounted on the test bed, and the input gear shaft is rotatably mounted on the input bearing seat; the lifting gear box comprises an input end and an output climbing gear; the input end is connected with the input gear shaft through a key; the first loading device is used for loading torque to the input gear shaft through the first loading pressure head; the second loading device is used for loading torque to the output climbing gear through a second loading pressure head; the limiting clamp is used for abutting against the output climbing gear to limit rotation of the output climbing gear, the static loading test of the lifting gear box can be achieved by combining the device with a loading method, the static supporting working condition of an ocean platform is simulated, and the test result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of gearbox loading tests, and in particular to a static load loading test device and method for a lifting gearbox of an offshore platform. Background Art

[0002] The lifting and reduction gearbox used for offshore platforms is different from ordinary industrial reduction gearboxes. Most operating conditions are static support status, that is, the gearbox is not running, but it needs to support the weight of the entire offshore platform. When encountering extreme weather, higher static support capabilities, that is, storm resistance capabilities, are also required.

[0003] In the prior art, the static support capacity of the lifting gearbox is still tested using the conventional industrial gearbox test method, that is, a gearbox operation loading test. In addition to the lifting gearbox to be tested, the existing test also requires the installation of another gearbox, and the overall structure is complex; and although the existing test is carried out at an extremely low operating speed and only requires the climbing gear shaft to run continuously for one week, the test is a dynamic loading test, which is different from the actual static working conditions of the lifting gearbox, and the test results are not accurate enough; and during the loading process, the load loaded by the motor needs to be gradually increased, resulting in the actual loading time being much longer than the time required for the test, and there is a test safety risk. Summary of the invention

[0004] The purpose of the present invention is to provide a static load loading test device and method for a lifting gearbox of an offshore platform, in view of the problem that in the prior art, a dynamic loading method is adopted when performing a loading test on a lifting gearbox of an offshore platform, which is different from the actual static working condition of the lifting gearbox and the test results are not accurate enough.

[0005] According to a first aspect of the present invention, the present invention provides a static load loading test device for an offshore platform lifting gearbox, the technical solution of which is: A static load loading test device for an offshore platform lifting gearbox comprises a test bench, a lifting gearbox, an input gear shaft, an input bearing seat, a first loading device with a first loading pressure head, a second loading device with a second loading pressure head and a limit clamp; the lifting gearbox, the input bearing seat and the limit clamp are all fixedly mounted on the test bench, and the input gear shaft is rotatably mounted on the input bearing seat; the lifting gearbox comprises an input end and an output climbing gear; the input end is connected to the input gear shaft by a key; the first loading device is used for loading torque on the input gear shaft through the first loading pressure head; the second loading device is used for loading torque on the output climbing gear through the second loading pressure head; the limit clamp is used for abutting against the output climbing gear to limit its rotation.

[0006] By setting up the above-mentioned loading test device, the second loading device loads torque on the output climbing gear through the second loading pressure head, and at the same time cooperates with the limit clamp to abut against the output climbing gear, and the two together keep the output climbing gear in a stationary state; the first loading device loads torque on the input gear shaft through the first loading pressure head, and transmits it to the output climbing gear through the input end of the lifting gear box. As long as the torque transmitted to the output climbing gear is less than the torque loaded on the output climbing gear by the second loading device, the output climbing gear can be ensured to be in a stationary state. By changing the loading torque of the first loading device, the measured torque of the lifting gear box can be changed.

[0007] Furthermore, the first loading device and the second loading device are both provided with a force measuring sensor for measuring the loading force, which is used for subsequent calculation of the loading torque.

[0008] Furthermore, the test bench includes a test bench guide rail and a test bench frame bolted to the test bench guide rail, the lifting gear box is bolted to the test bench frame, and the input bearing seat is bolted to the test bench guide rail.

[0009] Furthermore, the limit clamp is bolted to the test bench; the limit clamp is detachable, and when it is necessary to turn the output climbing gear significantly, the limit clamp can be removed first to avoid obstruction.

[0010] Furthermore, the input end of the lifting gear box is connected to the input gear shaft via a spline; the spline connection has a good torque transmission effect.

[0011] According to a second aspect of the present invention, the present invention provides a loading test method using the above-mentioned loading test device, the technical solution is, comprising the following steps: S1, manually rotating the output climbing gear until it abuts against the limiting clamp; pressing the second loading pressure head on the tooth surface of a certain tooth portion of the output climbing gear, so that the output climbing gear is clamped and fixed between the limiting clamp and the second loading pressure head, while ensuring that the load action line applied by the second loading pressure head on the output climbing gear is tangent to the pitch circle of the output climbing gear; S2, pressing the first loading ram on the tooth surface of the input gear shaft so that the tooth portion on the output climbing gear tends to move toward the second loading ram, while ensuring that the load action line applied by the first loading ram on the input gear shaft is tangent to the pitch circle of the input gear on the input gear shaft; S3, the second loading device loads the output climbing gear through the second loading pressure head, and the loading force is F2, and F2 satisfies: ;in is the pitch radius of the output climbing gear, is the static torque to be measured; S4, the first loading device loads the input gear shaft through the first loading pressure head, and the loading force is , satisfy: ,in is the pitch circle radius of the input gear, and i is the transmission ratio of the lifting gearbox.

[0012] In the present invention adopting the above technical solution, the first loading device loads the input gear shaft through the first loading pressure head, and the torque transmitted to the output climbing gear is the measured static torque The second loading device applies a torque to the output climbing gear through the second loading pressure head, and the loading torque of the second loading pressure head is greater than or equal to the measured static torque. At the same time, the limiting clamp is abutted against the output climbing gear, so that the output climbing gear can remain in a static state, thereby testing whether the static strength of the output climbing gear is qualified. Compared with the prior art, when performing a loading test on the lifting gear box for the marine platform, a dynamic loading method is adopted, which is different from the actual static working condition of the lifting gear box, and the test result is not accurate enough, the present invention can effectively realize the static loading test of the lifting gear box of the marine platform, highly simulate the static support working condition of the marine platform, and the test result is more accurate.

[0013] Furthermore, the method further comprises the steps of: S5, changing the tooth portion pressed by the second loading press head, repeating steps S1-S4, and completing the static strength test of all the teeth portions of the output climbing gear.

[0014] Furthermore, in step S1, another tooth portion on the output climbing gear except the tooth portion is abutted against the limit clamp, and the load action line applied by the limit clamp on the output climbing gear is colinear with the load action line applied by the second loading pressure head on the output climbing gear; with such an arrangement, the output climbing gear is subjected to more balanced force and the static state is more stable.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the effect of the static load loading test of the offshore platform lifting gearbox can be achieved by using only a single gearbox, and its structure is simple and economical; by changing the loading force of the first loading device, static strength tests under different torques can be obtained, which highly simulates the static support state of the lifting gearbox encountered in various situations at sea; compared with the dynamic loading method, the test results are more accurate, safer and more reliable; by changing the tooth pressed by the second loading pressure head, the static strength test of all teeth of the output climbing gear can be completed. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic diagram of the input gear loading structure; Figure 3 Schematic diagram of the output climbing gear loading structure.

[0017] Markings in the figure: 1-lifting gearbox, 2-test bench, 3-input gear shaft, 4-input bearing seat, 5-first loading device, 6-first loading pressure head, 7-second loading device, 8-second loading pressure head, 9-limiting clamp, 10-output climbing gear, 11-input gear, 12-tooth portion. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The present embodiment provides a static load loading test device for an offshore platform lifting gearbox, comprising a test bench, a lifting gearbox 1, an input gear shaft 3, an input bearing seat 4, a first loading device 5 with a first loading pressure head 6, a second loading device 7 with a second loading pressure head 8, and a limit clamp 9; the lifting gearbox 1, the input bearing seat 4, and the limit clamp 9 are all fixedly mounted on the test bench, and the input gear shaft 3 is rotatably mounted on the input bearing seat 4; the lifting gearbox 1 comprises an input end and an output climbing gear 10; the input end is connected to the input gear shaft 3 by a key; the first loading device 5 is used to load torque on the input gear shaft 3 through the first loading pressure head 6; the second loading device 7 is used to load torque on the output climbing gear 10 through the second loading pressure head 8; the limit clamp 9 is used to abut against the output climbing gear 10 to limit its rotation; The first loading device 5 and the second loading device 7 are both provided with a force measuring sensor for measuring the loading force; The test bench includes a test bench rail (not shown in the figure) and a test bench frame 2 bolted to the test bench rail, a lifting gear box 1 bolted to the test bench frame 2, and an input bearing seat 4 bolted to the test bench rail; a limit clamp 9 bolted to the test bench, specifically, bolted to the test bench frame 2; The input end of the lifting gear box 1 is connected to the input gear shaft 3 through a spline; A loading test method using the above-mentioned static load loading test device for the lifting gearbox of an offshore platform comprises the following steps: S1, manually rotate the output climbing gear 10 until it abuts against the limiting clamp 9; press the second loading ram 8 on the tooth surface of a certain tooth portion 12 of the output climbing gear 10, so that the output climbing gear 10 is clamped and fixed between the limiting clamp 9 and the second loading ram 8, and at the same time ensure that the load action line applied by the second loading ram 8 on the output climbing gear 10 is tangent to the pitch circle of the output climbing gear 10; In step S1, another tooth portion on the output climbing gear 10 except the tooth portion 12 abuts against the limiting clamp 9, and the load action line applied by the limiting clamp 9 to the output climbing gear 10 is collinear with the load action line applied by the second loading ram 8 to the output climbing gear 10; The output climbing gear 10 is an involute gear, and the second loading ram 8 is pressed on the effective involute tooth surface of the output climbing gear 10; the load action line applied by the second loading ram 8 on the output climbing gear 10 is tangent to the pitch circle of the output climbing gear 10, which is the same as the force direction of the tooth portion of the output climbing gear 10 under the actual static working condition, and highly simulates the actual force state of the output climbing gear 10 of the lifting gear box 1; S2, press the first loading ram 6 onto the tooth surface of the input gear shaft 3, so that the tooth portion 12 on the output climbing gear 10 tends to move toward the second loading ram 8, while ensuring that the load action line applied by the first loading ram 6 on the input gear shaft 3 is tangent to the pitch circle of the input gear 11 on the input gear shaft 3; The input gear 11 on the input gear shaft 3 is an involute gear, and the first loading ram 6 is pressed on the effective involute tooth surface of the input gear 11; Figure 2 As shown, when the first loading pressure head 6 is pressed on the tooth surface of the input gear shaft 3, the input gear shaft 3 tends to rotate clockwise, as shown in FIG. Figure 3 As shown, the output climbing gear 10 has a tendency to rotate counterclockwise after transmission, that is, the tooth portion 12 has a tendency to move toward the second loading pressure head 8; S3, the second loading device 7 loads the output climbing gear 10 through the second loading pressure head 8, and its loading force is F2, and F2 satisfies: ;in is the pitch circle radius of the output climbing gear 10, is the static torque to be measured; S4, the first loading device 5 loads the input gear shaft 3 through the first loading pressure head 6, and its loading force is , satisfy: ,in is the pitch radius of the input gear 11, i is the transmission ratio of the lifting gearbox 1; The first loading device 5 applies a loading torque to the input gear shaft 3 through the first loading ram 6. , is the torque transmitted to the output climbing gear 10, so that The second loading device 7 applies a loading torque to the output climbing gear 10 through the second loading head 8 , so that In this way, the sum of the torques of the second loading pressure head 8 and the limit clamp 9 on the output climbing gear 10 constrains the output climbing gear 10, and the output climbing gear 10 is in a static equilibrium state; thus, the static strength of the lifting gear box 1 can be measured; when When the value is the preload load, the static strength measured by the lifting gearbox 1 is the normal support load. When the value is the storm load, the static strength measured by the lifting gearbox 1 is the storm support load; if an abnormality occurs during the test or the gear breaks, it can automatically stop; S5, changing the tooth portion pressed by the second loading press head 8, repeating steps S1-S4, and completing the static strength test of all the teeth portions of the output climbing gear 10.

[0021] In the present invention adopting the above technical solution, the first loading device 5 loads the input gear shaft 3 through the first loading pressure head 6, and the torque transmitted to the output climbing gear 10 is the measured static torque The second loading device 7 applies torque to the output climbing gear 10 through the second loading pressure head 8, and the loading torque of the second loading pressure head 8 is greater than or equal to the measured static torque. , and at the same time cooperate with the limiting clamp 9 to abut against the output climbing gear 10, so that the output climbing gear 10 can remain in a static state, so as to test whether the static strength of the output climbing gear 10 is qualified. Compared with the prior art, when performing a loading test on the lifting gear box for the marine platform, a dynamic loading method is adopted, which is different from the actual static working condition of the lifting gear box, and the test result is not accurate enough. The present invention can effectively realize the static loading test of the lifting gear box of the marine platform, highly simulate the static support working condition of the marine platform, and the test result is more accurate; at the same time, only a single gear box is used to achieve the effect of the static load loading test of the marine platform lifting gear box, and its structure is simple and economical; by changing the loading force of the first loading device, the static strength test under different torques can be obtained, which highly simulates the static support state of the lifting gear box under various conditions at sea; compared with the dynamic loading method, it is safer and more reliable; by changing the tooth pressed by the second loading pressure head, the static strength test of all teeth of the output climbing gear can be completed.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A static load testing device for an offshore platform lifting gearbox, characterized in that: The invention comprises a test bench, a lifting gear box (1), an input gear shaft (3), an input bearing seat (4), a first loading device (5) with a first loading pressure head (6), a second loading device (7) with a second loading pressure head (8), and a limit clamp (9); the lifting gear box (1), the input bearing seat (4), and the limit clamp (9) are all fixedly mounted on the test bench, and the input gear shaft (3) is rotatably mounted on the input bearing seat (4); the lifting gear box (1) comprises an input end and an output climbing gear (10); the input end is connected to the input gear shaft (3) by a key; the first loading device (5) is used to load torque on the input gear shaft (3) through the first loading pressure head (6); the second loading device (7) is used to load torque on the output climbing gear (10) through the second loading pressure head (8); and the limit clamp (9) is used to abut against the output climbing gear (10) to limit its rotation.

2. The static load loading test device for the offshore platform lifting gearbox according to claim 1, characterized in that: The first loading device (5) and the second loading device (7) are both provided with a force measuring sensor for measuring the loading force.

3. The static load loading test device for the offshore platform lifting gearbox according to claim 1, characterized in that: The test bench comprises a test bench guide rail and a test bench frame (2) bolted to the test bench guide rail, the lifting gear box (1) is bolted to the test bench frame (2), and the input bearing seat (4) is bolted to the test bench guide rail.

4. The static load loading test device for the offshore platform lifting gearbox according to claim 1, characterized in that: The limiting clamp (9) is bolted to the test bench.

5. The static load loading test device for the offshore platform lifting gearbox according to claim 1, characterized in that: The input end of the lifting gear box (1) is connected to the input gear shaft (3) via a spline.

6. A loading test method using the static load loading test device for an offshore platform lifting gearbox according to any one of claims 2 to 5, characterized in that: The steps include: S1, manually rotating the output climbing gear (10) until it abuts against the limiting clamp (9); pressing the second loading pressure head (8) onto the tooth surface of a certain tooth portion (12) of the output climbing gear (10), so that the output climbing gear (10) is clamped and fixed between the limiting clamp (9) and the second loading pressure head (8), while ensuring that the load action line applied by the second loading pressure head (8) to the output climbing gear (10) is tangent to the pitch circle of the output climbing gear (10); S2, pressing the first loading ram (6) onto the tooth surface of the input gear shaft (3) so that the tooth portion (12) on the output climbing gear (10) tends to move toward the second loading ram (8), while ensuring that the load action line applied by the first loading ram (6) on the input gear shaft (3) is tangent to the pitch circle of the input gear (11) on the input gear shaft (3); S3, the second loading device (7) loads the output climbing gear (10) through the second loading pressure head (8), and the loading force is F2, and F2 satisfies: ;in is the pitch circle radius of the output climbing gear (10), is the static torque to be measured; S4, the first loading device (5) loads the input gear shaft (3) through the first loading pressure head (6), and the loading force is , satisfy: ,in is the pitch circle radius of the input gear (11), and i is the transmission ratio of the lifting gearbox (1).

7. The loading test method according to claim 6, characterized in that: Also includes the steps: S5, changing the tooth portion pressed by the second loading press head (8), repeating steps S1-S4, and completing the static strength test of all the tooth portions of the output climbing gear (10).

8. The loading test method according to claim 6, characterized in that: In step S1, another tooth portion on the output climbing gear (10) other than the tooth portion (12) abuts against the limit clamp (9), and a load action line applied by the limit clamp (9) to the output climbing gear (10) is collinear with a load action line applied by the second loading pressure head (8) to the output climbing gear (10).

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