Wind turbine gearbox no-load test device

Abstract

A wind power gearbox no-load test device has a bottom plate, a mounting platform is arranged on the bottom plate, the rear side of the mounting platform is hinged on the bottom plate, a pair of hydraulic cylinders capable of driving the mounting platform to be tilted are arranged between the bottom plate and the front side of the mounting platform, a base is fixed on the mounting platform and at the rear side, a transverse slide rail is fixed on the front side, an adjustment mechanism is installed on the base, a motor is driven by the adjustment mechanism to move horizontally and vertically, and two gearbox mounting brackets are movably connected to the slide rail. The two gearbox mounting brackets of the present invention can slide on the slide rail to adapt to the difference in the span of the torque arm of wind power gearboxes of different models; the position of the motor can be adjusted in both the horizontal and vertical directions to adapt to the difference in the offset of the high-speed shaft of wind power gearboxes of different models. The present invention is compatible with different models of wind power gearbox tests, which greatly improves the versatility of the device. The mounting platform is driven by the hydraulic cylinder to tilt relative to the base, and the tilt angle can be adjusted to adapt to different test items.

Description

Technical Field

[0001] The invention relates to a no-load test device for a wind power gear box. Background Art

[0002] Wind power gearboxes need to undergo rigorous testing and verification before leaving the factory. Usually, two gearboxes are connected back to back on a loading test bench for verification. The gearboxes are installed in a horizontal position. The loading test is more about verifying the vibration, noise, thermal balance, efficiency and other contents of the gearbox. However, since the gearbox is installed in a horizontal position, it is different from the installation at an inclined angle in the wind turbine, resulting in the gearbox's total oil volume, oil leakage, liquid level pouring fluctuations, liquid level gauge alarm and other contents cannot be fully verified. An existing method is to make a special mounting bracket for the gearbox with an inclined angle, but the mounting bracket cannot be universal between different models of gearboxes, and the inclination angle is a fixed value. On the one hand, it has a great relationship with the manufacturing accuracy of the bracket. On the other hand, the angle cannot be adjusted, which has great limitations in actual use. The invention patent application with the Chinese patent application publication number CN105784361A discloses a closed-loop tiltable polygonal excitation gearbox test bench for power machinery, which is used to simulate the actual operation of high-speed trains and conduct relevant tests on train excitation gearboxes. Summary of the invention

[0003] The purpose of the present invention is to provide a wind turbine gearbox no-load test device which can simulate the inclined installation of a wind turbine gearbox in a unit and is compatible with tests of wind turbine gearboxes of different models.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a wind power gearbox no-load test device, comprising a base plate, a mounting platform is arranged on the base plate, the rear side of the mounting platform is hinged on the base plate, a pair of hydraulic cylinders that can drive the mounting platform into an inclined shape are arranged between the base plate and the front side of the mounting platform, a base is fixed on the mounting platform and on the rear side, a transverse slide rail is fixed on the front side, an adjustment mechanism is installed on the base, a motor is driven by the adjustment mechanism to move horizontally and vertically, and two gearbox mounting brackets are movably connected to the slide rail.

[0005] The slide rails are two sections of slide rails symmetrically arranged on the same straight line.

[0006] A mechanical self-locking component is respectively provided at the front end of the left and right sides of the base plate, and a pin hole is respectively provided on the left and right sides of the mounting platform. The mechanical self-locking component includes a latch and a positioning plate fixed to the base plate, and a plurality of positioning holes are provided on the positioning plate. When the mounting platform is in an inclined state, the latch is inserted into the pin hole of the mounting platform through the corresponding positioning hole on the positioning plate.

[0007] The hydraulic cylinder is a pull rod type hydraulic cylinder, two pairs of upper support seats are fixed on the front side of the mounting platform, two pairs of lower support seats are fixed on the bottom plate opposite to the two pairs of upper support seats, a through hole is provided between the two upper support seats in the same pair on the mounting platform, a hydraulic cylinder is supported by a pair of upper support seats and a pair of lower support seats, the cylinder body of the hydraulic cylinder is hinged between the two upper support seats in the same pair, and its piston rod passes through the through hole on the mounting platform and is hinged between the two corresponding lower support seats in the same pair.

[0008] The mounting platform is provided with an adjustable top column for supporting the rear side of the wind power gear box, and the adjustable top column is located on the longitudinal center line of the slide rail.

[0009] The adjustable top column is either a jack or a screw rod.

[0010] The motor and the wind power gearbox are driven by a belt.

[0011] The adjusting mechanism includes a base frame fixed on the base, a transverse guide rail is respectively fixed on the front and rear side parts of the base frame, a transverse lead screw is provided between the two transverse guide rails, the transverse lead screw is supported by left and right limit frames, a transverse sliding plate is provided on the two transverse guide rails, a slider fixed at the bottom of the transverse sliding plate is threadedly connected to the transverse lead screw, at least two connecting bolts are respectively provided in the slide grooves of the two transverse guide rails, and the connecting bolts are connected to the transverse sliding plate; a longitudinal guide rail is respectively fixed on the left and right side parts of the transverse sliding plate, a longitudinal lead screw is provided between the two longitudinal guide rails, the longitudinal lead screw is supported by front and rear limit frames, a longitudinal sliding plate is provided on the two longitudinal guide rails, a slider fixed at the bottom of the longitudinal sliding plate is threadedly connected to the longitudinal lead screw, at least two connecting bolts are respectively provided in the slide grooves of the two longitudinal guide rails, and the connecting bolts are connected to the longitudinal sliding plate.

[0012] A motor is installed on the longitudinal slide plate, and a bracket at the bottom of the motor and the longitudinal slide plate are connected together by connecting bolts arranged in the longitudinal guide rail slide groove.

[0013] The gearbox mounting bracket comprises a sliding block at the bottom and two fence-shaped support plates connected to the sliding block. The top surfaces of the two support plates, i.e., the support surfaces, are V-shaped. The gearbox mounting bracket is movably connected to the slide rail through the slide groove on the sliding block.

[0014] The present invention has the following positive effects: 1. The two gearbox mounting brackets of the present invention can slide on the slide rails to adapt to the difference in the span of the torque arm of different types of wind turbine gearboxes; the position of the motor can be adjusted in two orthogonal directions, horizontally and longitudinally, to adapt to the difference in the high-speed shaft offset of different types of wind turbine gearboxes. The present invention is compatible with different types of wind turbine gearbox tests, which greatly improves the versatility of the device. 2. The installation platform is tilted relative to the base by a pull rod type hydraulic cylinder, and the tilt angle can be adjusted to adapt to different test items. 3. The present invention is provided with a mechanical self-locking component to achieve dual protection of hydraulic self-locking and mechanical self-locking, and has high safety performance. 4. The gearbox mounting bracket has two fence-shaped support plates, and the support surfaces of the two support plates are V-shaped, which is suitable for the placement of the gearbox torque arm. The tail of the wind turbine gearbox is auxiliary supported by an adjustable top column, and the wind turbine gearbox is easy to load and unload and has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall stereogram of the test device.

[0016] Figure 2 This is the overall stereogram of the test device (with Figure 1 different directions).

[0017] Figure 3 It is a top view of the installation platform of the test device in a horizontal state.

[0018] Figure 4 It is an overall stereoscopic diagram with a wind turbine gearbox installed.

[0019] Figure 5 It is a three-dimensional diagram of the adjustment mechanism.

[0020] Figure 6 is a three-dimensional diagram of the adjustment mechanism (with Figure 5 different directions).

[0021] Figure 7 It is a bottom view of the adjustment mechanism. DETAILED DESCRIPTION

[0022] Example 1

[0023] See Figures 1 to 7 This embodiment has a base plate 1, on which a mounting platform 2 is provided. The rear side of the mounting platform 2 is hinged to the base plate by two pairs of hinges 13. The hinge 13 includes a double-ear hinge seat 13-1 fixed to the base plate and a single-ear hinge seat 13-2 fixed to the bottom surface of the mounting platform. The single-ear hinge seat 13-2 is inserted into the double-ear hinge seat 13-2, and the two are hinged by inserting a pin shaft into the pin shaft hole of the single-ear hinge seat and the double-ear hinge seat.

[0024] A pair of hydraulic cylinders 9 are provided between the bottom plate 2 and the front side of the mounting platform 2. The hydraulic cylinders 9 are tie rod type hydraulic cylinders. Two pairs of upper support seats 11-1 are fixed on the front side of the mounting platform 2. Two pairs of lower support seats 11-2 are fixed on the bottom plate 1 opposite to the two pairs of upper support seats 11-1. Through holes are provided between the two upper support seats 11-1 in the same pair on the mounting platform 2. One hydraulic cylinder 9 is supported by a pair of upper support seats 11-1 and a pair of lower support seats 11-2. The cylinder body 9-1 of the hydraulic cylinder 9 is hinged between the two upper support seats 11-1 in the same pair. Its piston rod 9-2 passes through the through hole on the mounting platform 2 and is hinged between the two corresponding lower support seats 11-2 in the same pair. The hydraulic cylinder 9 rises and falls, driving the mounting platform 2 to tilt.

[0025] A base 3 is fixed to the rear side of the mounting platform 2, and an adjustment mechanism 4 is provided on the base 3. Figures 5 to 7 The adjustment mechanism 4 includes a base frame 4-1 fixed on the base 3, a transverse guide rail 4-2 is fixed on each of the front and rear sides of the base frame 4-1, and a transverse screw 4-3 is provided between the two transverse guide rails 4-2, and the transverse screw 4-3 is a ball screw. The transverse screw 4-3 is supported by the left and right limit frames 4-4 fixed on the base frame 4-1, and a transverse sliding plate 4-5 is provided on the two transverse guide rails 4-2. The slider 4-6 fixed at the bottom of the transverse sliding plate 4-5 is threadedly connected with the transverse screw 4-3. At least two connecting bolts 4-7 are provided in the slide grooves 4-2-a of the two transverse guide rails 4-2, and the connecting bolts 4-7 are connected with the transverse sliding plate 4-5. The slide grooves of the above-mentioned transverse guide rails 4-2 are inverted T-shaped grooves, and the connecting bolts 4-7 are square head bolts. The heads of the square head bolts are inserted into the slide grooves of the transverse guide rails to play a guiding role. When the required position is reached, the nuts on the connecting bolts 4-7 are tightened to fix the transverse sliding plate 4-5. A longitudinal guide rail 4-8 is fixed to the left and right sides of the above-mentioned transverse sliding plate 4-5, and a longitudinal screw 4-9 is arranged between the two longitudinal guide rails 4-8. The longitudinal screw 4-9 is a ball screw, and the longitudinal screw 4-9 is supported by the front and rear limit frames 4-10 fixed on the transverse sliding plate 4-5. A longitudinal sliding plate 4-11 is arranged on the two longitudinal guide rails 4-8, and the slider at the bottom of the longitudinal sliding plate 4-11 is threadedly connected with the longitudinal screw 4-9. At least two connecting bolts 4-7 are arranged in the sliding groove 4-8-a of the two longitudinal guide rails 4-8, and the connecting bolt 4-7 is connected to the longitudinal sliding plate 4-11. The sliding groove of the above-mentioned longitudinal guide rail 4-8 is an inverted T-shaped groove, and the connecting bolt 4-7 is a square head bolt, and the head of the square head bolt is inserted into the sliding groove of the longitudinal guide rail 4-8.

[0026] The motor 5 is installed on the longitudinal slide 4-11, and the bracket 5-1 at the bottom of the motor and the longitudinal slide 4-11 are connected together by the connecting bolt 4-7 set in the slide groove 4-8-a of the longitudinal guide rail 4-8. The transverse lead screw 4-3 is rotated, and the longitudinal slide 4-11 is driven by the traverse slide 4-5 to move transversely, and the motor 5 moves transversely with the longitudinal slide 4-11. The longitudinal lead screw 4-9 is rotated, and the longitudinal slide 4-11 moves longitudinally, and the motor 5 moves longitudinally with the longitudinal slide 4-11, and the motor 5 realizes transverse and longitudinal movement.

[0027] The front side of the mounting platform 2 is provided with a transverse slide rail 7, which is two sections of slide rails symmetrically arranged on the same straight line. It can also be a long slide rail. A gearbox mounting bracket 8 is movably connected to each of the two sections of the slide rail 7. The gearbox mounting bracket 8 has a sliding block 8-1 at the bottom and two opposite fence-shaped support plates 8-2 connected to the sliding block 8-1. The top surfaces of the two support plates 8-2, i.e., the support surfaces 8-2-1, are V-shaped, and the gearbox mounting bracket 8 is movably connected to the slide rail 7 through the sliding groove on the sliding block 8-1. The sliding groove on the sliding block 8-1 and the slide rail 7 are both dovetail-shaped. The gearbox mounting bracket 8 is suitable for shelving the torque arm of the wind power gearbox 15 (see Figure 4 ).

[0028] The front ends of the left and right sides of the bottom plate 1 are each provided with a mechanical self-locking assembly 10, and the front ends of the left and right sides of the mounting platform 2 are each provided with a pin hole. The mechanical self-locking assembly 10 includes a positioning plate 10-1 and a latch 10-2 fixed to the bottom plate 1. The positioning plate 10-1 is provided with a plurality of positioning holes 10-a. When the mounting platform 2 is in an inclined state, the latch 10-2 is inserted into the pin hole of the mounting platform 2 through the corresponding positioning hole 10-a on the positioning plate. The positioning holes 10-a are provided as required, for example, a positioning hole 10-a is provided every 0.5°.

[0029] The mounting platform 2 is provided with an adjustable top column 6 for supporting the tail of the wind power gear box 15, and the adjustable top column 6 is located on the longitudinal center line f of the slide rail. The adjustable top column 6 is used to provide auxiliary support for the wind power gear box 15. The adjustable top column 6 is either a jack or a screw. If it is a screw, the screw is threadedly connected to the mounting platform and is locked by two nuts located at the upper and lower parts of the mounting platform respectively.

[0030] There is a belt drive between the motor 5 and the wind turbine gearbox 15, and the belt 14 transmits the power of the motor 5 to the wind turbine gearbox 15. During the test, the two torque arms of the wind turbine gearbox 15 are placed on the two gearbox mounting brackets 8 respectively, and the tail of the wind turbine gearbox 15 is placed on the adjustable top column 6. Start the pull rod type hydraulic cylinder 9, the mounting platform 2 is tilted and rotated relative to the base 1, and reaches the specified angle, the hydraulic cylinder 9 is self-locked, and the latch 10-2 is inserted into the pin hole of the mounting platform 2 through the corresponding positioning hole 10-a on the positioning plate 10-1, and the mounting platform 2 is mechanically locked, realizing the dual protection of hydraulic self-locking and mechanical self-locking, and the adjustment mechanism 4 can adjust the belt tightness to a suitable degree.

[0031] This embodiment can adapt to the difference in torque arm span of wind turbine gearboxes of different models by adjusting the position of the gearbox mounting bracket; and can adapt to the difference in high-speed shaft offset of wind turbine gearboxes of different models by adjusting the position of the motor.

Claims

1. A wind turbine gearbox no-load test device, characterized in that: The invention comprises a bottom plate (1), a mounting platform (2) is arranged on the bottom plate (1), the rear side of the mounting platform (2) is hinged on the bottom plate (1), a pair of hydraulic cylinders (9) capable of driving the mounting platform (2) to be tilted are arranged between the bottom plate (1) and the front side of the mounting platform (2), a base (3) is fixed on the mounting platform (2) and at the rear side, a transverse slide rail (7) is fixed on the front side, an adjustment mechanism (4) is installed on the base (3), a motor (5) is driven by the adjustment mechanism (4) to move transversely and longitudinally to adapt to the difference in high-speed shaft offset of wind power gear boxes (15) of different models, two gear box mounting brackets (8) are movably connected to the slide rail (7) to adapt to the difference in torque arm span of wind power gear boxes (15) of different models, a belt drive (14) is arranged between the motor (5) and the wind power gear box (15), and the adjustment mechanism (4) can adjust the tightness of the belt.

2. The wind turbine gearbox no-load test device according to claim 1 is characterized in that: The slide rails (7) are two sections of slide rails symmetrically arranged on the same straight line.

3. The wind turbine gearbox no-load test device according to claim 1 is characterized in that: A mechanical self-locking component (10) is provided at the front end of the left and right sides of the base plate (1), and a pin hole is provided on the left and right sides of the mounting platform (2). The mechanical self-locking component (10) comprises a latch (10-2) and a positioning plate (10-1) fixed to the base plate (1), and a plurality of positioning holes (10-a) are provided on the positioning plate (10-1). When the mounting platform (2) is in an inclined state, the latch (10-2) is inserted into the pin hole of the mounting platform (2) through the corresponding positioning hole (10-a) on the positioning plate.

4. The wind turbine gearbox no-load test device according to claim 1, characterized in that: The hydraulic cylinder (9) is a tie rod type hydraulic cylinder, two pairs of upper support seats (11-1) are fixed on the front side of the mounting platform (2), two pairs of lower support seats (11-2) are fixed on the bottom plate (1) opposite to the two pairs of upper support seats (11-1), a through hole is provided between the two upper support seats (11-1) in the same pair on the mounting platform (2), a hydraulic cylinder (9) is supported by a pair of upper support seats (11-1) and a pair of lower support seats (11-2), a cylinder body (9-1) of the hydraulic cylinder (9) is hinged between the two upper support seats (11-1) in the same pair, and a piston rod (9-2) thereof is hinged between the two corresponding lower support seats (11-2) in the same pair through the through hole on the mounting platform (2).

5. The wind turbine gearbox no-load test device according to claim 1 is characterized in that: The mounting platform (2) is provided with an adjustable top column (6) for supporting the rear side of the wind power gear box (15), and the adjustable top column (6) is located on the longitudinal center line (f) of the slide rail.

6. The wind turbine gearbox no-load test device according to claim 5, characterized in that: The adjustable top column (6) is either a jack or a screw rod.

7. The wind turbine gearbox no-load test device according to claim 1, characterized in that: The adjustment mechanism (4) comprises a base frame (4-1) fixed on the base (3), a transverse guide rail (4-2) is fixed on the front and rear sides of the base frame (4-1), a transverse lead screw (4-3) is provided between the two transverse guide rails (4-2), the transverse lead screw (4-3) is supported by left and right limit frames (4-4), a transverse sliding plate (4-5) is provided on the two transverse guide rails (4-2), a slider (4-6) fixed at the bottom of the transverse sliding plate (4-5) is threadedly connected to the transverse lead screw (4-3), and at least two connecting bolts (4-7) are provided in the slide grooves (4-2-a) of the two transverse guide rails (4-2), and the connecting bolts (4-7) are connected to the transverse guide rails (4-2). ) is connected with a transverse sliding plate (4-5); a longitudinal guide rail (4-8) is fixed on the left and right sides of the transverse sliding plate (4-5), a longitudinal lead screw (4-9) is provided between the two longitudinal guide rails (4-8), the longitudinal lead screw (4-9) is supported by front and rear limit frames (4-10), a longitudinal sliding plate (4-11) is provided on the two longitudinal guide rails (4-8), a slider fixed at the bottom of the longitudinal sliding plate (4-11) is threadedly connected with the longitudinal lead screw (4-9), at least two connecting bolts (4-7) are respectively provided in the slide grooves (4-8-a) of the two longitudinal guide rails (4-8), and the connecting bolts (4-7) are connected with the longitudinal sliding plate (4-11).

8. The wind turbine gearbox no-load test device according to claim 7, characterized in that: A motor (5) is mounted on the longitudinal slide plate (4-11), and a bracket (5-1) at the bottom of the motor and the longitudinal slide plate (4-11) are connected together by connecting bolts (4-7) arranged in the longitudinal guide rail slots (4-8-a).

9. The wind turbine gearbox no-load test device according to claim 1, characterized in that: The gearbox mounting bracket (8) comprises a sliding block (8-1) at the bottom and two fence-shaped support plates (8-2) connected to the sliding block. The top surfaces of the two support plates (8-2), i.e., support surfaces (8-2-1), are V-shaped. The gearbox mounting bracket (8) is movably connected to the slide rail (7) via a slide groove on the sliding block (8-1).

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