Center searching and positioning clamp for underground turbine generator

Abstract

The utility model relates to an underground turbine generator centering and positioning clamp which comprises an upper clamping block, a lower clamping block and a vertical plate, the upper clamping block is a convex block, the lower clamping block is a concave block, and the upper clamping block and the lower clamping block are used as a whole after being combined in an up-and-down mode. A circular through hole I is formed inside the folded whole, the vertical plate is fixed on the right side, and the diameter of the through hole I is slightly larger than that of an outer cylinder of the generator; a vertical through groove is formed in the upper clamping block, and a pressure spring and a bearing frame are placed in the vertical through groove; the bearing frame is U-shaped, and a ball bearing I is clamped in the U-shaped bearing frame; a horizontal penetrating groove is formed in the middle of the lower clamping block, and a sliding block groove is formed in the right side face. A ball bearing II and a ball bearing III are placed in the horizontal through groove, and the specification and the model of the ball bearing II and the ball bearing III are the same as those of the ball bearing I; inner rings of the ball bearings I, II and III are in interference fit with positioning shafts, and bearing gaskets are arranged on the two sides of the bearings; and the positioning shaft is fixed on the upper clamping block or the lower clamping block through a shaft retainer ring.

Description

Technical Field

[0001] This utility model relates to the field of downhole turbine generator clamps, and in particular to a centering and positioning clamp for a downhole turbine generator. Background Technology

[0002] Currently, several research institutes in China have developed multiple domestically produced rotary steering systems based on the PowerDrive fully rotary automatic steering system. The turbine generator is the downhole power source for these rotary steering systems. Although the structure of the turbine generator varies from system to system, they are all cylindrical in shape, and the outer cylinder of the generator rotates together with the turbine.

[0003] After the aforementioned turbine generator is developed, it must first undergo surface testing to determine whether its power generation performance meets the design requirements. Testing requires a generator test platform, which typically includes components such as a clamping device, a drive motor, and transmission components. The clamping device is used to support both ends of the turbine generator, the drive motor provides speed and torque, and the transmission components connect the drive motor to the turbine generator under test.

[0004] When testing the aforementioned turbine generator using an existing power generation testing platform, it was found that the long outer cylinder of the turbine generator is prone to eccentricity and vibration at high speeds, resulting in unstable test data. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model aims to provide a centering and positioning fixture for a downhole turbine generator, comprising an upper clamping block, a lower clamping block, and a vertical plate. The upper clamping block is a convex block, and the lower clamping block is a concave block, which are used as a whole after being fitted together. A circular through hole is formed inside the fitted whole, and the vertical plate is fixed to the right side. The through hole is slightly larger than the diameter of the generator's outer cylinder. A vertical through slot is formed inside the upper clamping block, in which a compression spring and a bearing bracket are placed. The bearing bracket is U-shaped, and a ball bearing is clamped inside the U-shape. A horizontal through slot is formed in the middle of the lower clamping block, and a slider slot is formed on the right side. A second ball bearing and a third ball bearing, with the same specifications and models as the first ball bearing, are placed in the horizontal through slot. The inner rings of the first, second, and third ball bearings are all interference-fitted with a positioning shaft, and bearing washers are provided on both sides of the bearings. The positioning shaft is fixed to the upper or lower clamping block by a shaft retaining ring.

[0006] Furthermore, the three axes of the ball bearings one, two, and three are evenly distributed 360° on the circumference of circle one. Circle one is concentric with the through hole and its diameter is larger than that of the through hole.

[0007] Furthermore, the outer rings of the three ball bearings (one, two, and three) are defined by a circle two that is externally tangent to them. This circle two is concentric with the through hole one and the circle one, and its diameter is the same as the diameter of the generator outer cylinder. The three tangent points generated by the tangency are in contact with the generator outer cylinder.

[0008] Furthermore, the entrance of the vertical through groove is provided with internal threads, and an external hexagonal bolt is provided inside. The vertical position of the ball bearing can be finely adjusted by adjusting the tightness of the bolt.

[0009] Furthermore, the upper half of the slider groove is rectangular, and the lower half is dovetail-shaped, with a slider for matching it installed inside; the upper half of the slider is U-shaped, and the lower half is dovetail-shaped.

[0010] Furthermore, the U-shaped end is the bearing mounting end, and the dovetail end is the bearing adjustment end; the ball bearing is installed inside the bearing mounting end.

[0011] Furthermore, the bearing adjustment end has a through hole two, and a slider shaft is inserted into the hole. The left side of the slider shaft is the mounting end, and the right side is the threaded end. Two adjusting nuts are installed on the threaded end, which are respectively installed on the left and right sides of the vertical plate. The insertion depth of the slider shaft can be adjusted by adjusting the tightness of the adjusting nuts, thereby finely adjusting the left and right positions of the ball bearing three.

[0012] The beneficial effects of this invention are as follows: First, this invention positions the generator outer cylinder through three contact points created by the tangency of the outer rings of the first, second, and third ball bearings with the generator outer cylinder. Second, during testing, the bearing outer rings rotate with the generator outer cylinder, and the contact points change; the friction generated by these point contacts does not affect the rotation of the generator outer cylinder. Finally, the generator outer cylinder is machined, and its outer diameter has allowable variations (tolerances). To ensure adaptability, the vertical position of the first ball bearing and the horizontal position of the third ball bearing can be finely adjusted, enabling centering and positioning of the generator outer cylinder in two degrees of freedom. Attached Figure Description

[0013] Figure 1 This is a sectional view of the main view of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention along direction A.

[0015] As shown in the figure: 1. Upper clamping block; 2. Lower clamping block; 3. Vertical plate; 4. Through hole one; 101. Vertical through slot; 102. Compression spring; 103. Bearing bracket; 104. Ball bearing one; 201. Horizontal through slot; 202. Slider slot; 203. Ball bearing two; 204. Ball bearing three; 5. Positioning shaft; 6. Bearing gasket; 7. Shaft retaining ring; 8. Circle one; 9. Circle two; 205. Slider; 206. Bearing mounting end; 207. Bearing adjusting end; 208. Slider shaft; 209. Adjusting nut. Detailed Implementation

[0016] Example

[0017] The present invention will be further described in conjunction with the accompanying drawings, such as... Figure 1 , 2 As shown, a centering and positioning fixture for a downhole turbine generator includes an upper clamping block 1, a lower clamping block 2, and a vertical plate 3. The upper clamping block 1 is a convex block, and the lower clamping block 2 is a concave block. The two are used as a whole after being fitted together. A circular through hole 4 is opened inside the assembled whole. The vertical plate 3 is fixed on the right side, and the through hole 4 is slightly larger than the diameter of the generator's outer cylinder. A vertical through groove 101 is opened inside the upper clamping block 1, in which a compression spring 102 and a bearing bracket 103 are placed. The bearing bracket 103 is U-shaped, and the U-shape is clamped inside. There is a ball bearing 104; the lower clamping block 2 has a horizontal through groove 201 in the middle and a slider groove 202 in the right side; ball bearing 203 and ball bearing 204 are placed in the horizontal through groove 201, and their specifications are the same as those of ball bearing 104; the inner rings of ball bearings 104, 203 and 204 are interference-fitted with positioning shafts 5, and bearing washers 6 are provided on both sides of the bearings; the positioning shafts 5 are fixed to the upper clamping block 1 or the lower clamping block 2 by shaft retaining rings 7.

[0018] Furthermore, the three axes of the ball bearings 104, 203, and 204 are evenly distributed 360° on the circumference of circle 8. Circle 8 is concentric with the through hole 4 and has a larger diameter than the through hole 4.

[0019] Furthermore, the outer rings of the three ball bearings 104, 203, and 204 are defined by a circle 9 that is externally tangent to them. This circle 9 is concentric with the through hole 4 and the circle 8, and its diameter is the same as that of the generator outer cylinder. The three tangent points generated by the tangency are in contact with the generator outer cylinder.

[0020] Furthermore, the entrance of the vertical through groove 101 is provided with internal threads, and an external hexagonal bolt is provided inside. The vertical position of the ball bearing 104 can be finely adjusted by adjusting the tightness of the bolt.

[0021] Furthermore, the upper half of the slider groove 202 is rectangular and the lower half is dovetail-shaped, and a slider 205 for matching use is installed inside; the upper half of the slider 205 is U-shaped and the lower half is dovetail-shaped.

[0022] Furthermore, the U-shaped end is the bearing mounting end 206, and the dovetail end is the bearing adjusting end 207; the ball bearing 204 is installed inside the bearing mounting end 206.

[0023] Furthermore, the bearing adjustment end 207 has a through hole 2, into which a slider shaft 208 is inserted. The left side of the slider shaft 208 is the mounting end, and the right side is the threaded end. Two adjusting nuts 209 are installed on the threaded end, which are respectively installed on the left and right sides of the vertical plate 3. The insertion depth of the slider shaft 208 can be adjusted by adjusting the tightness of the adjusting nuts 209, thereby finely adjusting the left and right positions of the ball bearing 204.

Claims

1. A centering and positioning fixture for a downhole turbine generator, comprising an upper clamping block (1), a lower clamping block (2), and a vertical plate (3), wherein the upper clamping block (1) is a convex block, and the lower clamping block (2) is a concave block, and the two are used as a whole after being fitted together; characterized in that, The assembled unit has a circular through hole 1 (4) inside, and the upright plate (3) is fixed on the right side. The through hole 1 (4) is slightly larger than the diameter of the generator outer cylinder. The upper clamping block (1) has a vertical through groove (101) inside, in which a compression spring (102) and a bearing bracket (103) are placed. The bearing bracket (103) is U-shaped, and a ball bearing 1 (104) is clamped inside the U-shape. The lower clamping block (2) has a horizontal through groove (201) in the middle, and a slider groove in the right side. (202); The horizontal through groove (201) contains ball bearing two (203) and ball bearing three (204), the specifications of which are the same as those of ball bearing one (104); the inner rings of ball bearing one (104), two (203) and three (204) are interference-fitted with positioning shafts (5), and bearing washers (6) are provided on both sides of the bearings; the positioning shaft (5) is fixed on the upper clamping block (1) or the lower clamping block (2) by a shaft retaining ring (7).

2. The downhole turbine generator centering and positioning fixture according to claim 1, characterized in that, The three axes of the ball bearings one (104), two (203), and three (204) are evenly distributed 360° on the circumference of circle one (8). Circle one (8) is concentric with the through hole one (4) and its diameter is larger than that of the through hole one (4).

3. The downhole turbine generator centering and positioning fixture according to claim 1, characterized in that, The outer rings of the three ball bearings (104), (203), and (204) define a circle (9) that is externally tangent to them. This circle (9) is concentric with the through hole (4) and the circle (8), and its diameter is the same as that of the generator outer cylinder. The three tangent points generated by the tangency are in contact with the generator outer cylinder.

4. The downhole turbine generator centering and positioning fixture according to claim 1, characterized in that, The vertical through groove (101) has an internal thread at its entrance and is fitted with an external hexagonal bolt. The upper and lower positions of the ball bearing (104) can be finely adjusted by adjusting the tightness of the bolt.

5. A centering fixture for a downhole turbine generator according to claim 1, characterized in that, The upper half of the slider groove (202) is rectangular and the lower half is dovetail-shaped, and a slider (205) for use with it is installed inside; the upper half of the slider (205) is U-shaped and the lower half is dovetail-shaped.

6. A centering fixture for a downhole turbine generator according to claim 5, characterized in that, The U-shaped end is the bearing mounting end (206), and the dovetail end is the bearing adjustment end (207); the ball bearing three (204) is installed inside the bearing mounting end (206).

7. A centering fixture for a downhole turbine generator according to claim 6, characterized in that, The bearing adjustment end (207) has a through hole 2, and a slider shaft (208) is inserted into the hole. The left side of the slider shaft (208) is the mounting end, and the right side is the threaded end. Two adjusting nuts (209) are installed on the threaded end, which are respectively installed on the left and right sides of the vertical plate (3). The insertion depth of the slider shaft (208) can be adjusted by adjusting the tightness of the adjusting nuts (209), and then the left and right positions of the ball bearing 3 (204) can be finely adjusted.

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