Generator turbine spraying protection clamp

Abstract

The utility model relates to a generator turbine spraying protection clamp which comprises a threaded rod, an upper end cover and a lower end cover. One end of the threaded rod is a knurled end, the other end of the threaded rod is a threaded end, the middle of the threaded rod is a cylindrical rod, and the diameter of the cylindrical rod is slightly smaller than that of the knurled end. The threaded end is sleeved with the upper end cover, and a sheath assembly is installed above the upper end cover. The cylindrical rod is sleeved with the lower end cover, a first adjusting cushion block is installed below the lower end cover, and a second adjusting cushion block is installed in the first adjusting cushion block.

Description

Technical Field

[0001] This utility model relates to the field of workpiece spray protection fixtures, and particularly to a generator turbine spray protection fixture. Background Technology

[0002] In recent years, downhole mud generators have been widely used as downhole power sources for measurement-while-drilling (MWD) instruments and rotary steerable systems. The turbine is a crucial transmission component of the generator, and its blades are easily damaged by mud erosion, resulting in a turbine lifespan of only tens to hundreds of hours. Turbines are typically made of corrosion-resistant stainless steel, and their lifespan depends not only on operating conditions but also on parameters such as blade angle and thickness, with blade thickness having a particularly significant impact. The turbine blades of a certain directional rotary steerable system are very thin, leading to rapid downhole erosion and a short lifespan (tens of hours). To extend the lifespan of such turbines, researchers have drawn on experience with aircraft generator turbines, adding a wear-resistant coating to the exterior of the stainless steel substrate.

[0003] The turbine workpieces requiring wear-resistant coating are divided into a spraying area and a no-spray area. The entire exterior of the turbine (including the blades and outer cylindrical surface) is the spraying area, while the inner bore is the no-spray area. The no-spray area must be protected during spraying. In addition, to ensure uniform coating, the turbine workpiece must be rotated during the spraying process.

[0004] In existing technologies, the inner hole is protected by sealing it with adhesive tape, and the workpiece is rotated by clamping it with pliers on a workbench. However, sealing with adhesive tape can easily result in under- or over-spraying, leading to poor coating quality. Clamping and rotating the workpiece on the workbench is not conducive to continuous spraying. Both methods are time-consuming, labor-intensive, and result in low labor intensity. Summary of the Invention

[0005] To address the shortcomings of current technology, this utility model aims to provide a generator turbine spraying protection fixture, comprising a threaded rod, an upper end cover, and a lower end cover: one end of the threaded rod is a knurled end, the other end is a threaded end, and the middle part is a cylindrical rod, with the diameter of the cylindrical rod being slightly smaller than that of the knurled end; the upper end cover is fitted over the threaded end, and a protective sleeve assembly is mounted on top of it; the lower end cover is fitted over the cylindrical rod, and an adjusting shim 1 is mounted below it, with an adjusting shim 2 mounted inside the adjusting shim 1.

[0006] Furthermore, both the upper and lower end covers are disc-shaped parts, and each consists of two discs, one large and one small. The large discs of the upper and lower end covers are used to seal the upper and lower end faces of the workpiece, respectively. The outer cylindrical surfaces of the small discs of the upper and lower end covers are used to mate with the inner holes at both ends of the workpiece.

[0007] Furthermore, the sheath assembly is formed by welding a nut and a threaded sheath together. The nut is used to lock the upper end cap, and the threaded sheath is used to protect the threaded end from being sprayed.

[0008] Furthermore, both the adjusting shim one and the adjusting shim two are designed to adjust the vertical position of the workpiece on the threaded rod. When spraying workpieces of different lengths in the same series, adjusting shim one or adjusting shim two can be used selectively according to the length of the workpiece, or neither can be used.

[0009] The beneficial effects of this utility model are as follows: This new model locks the workpiece by tightening both ends, which can effectively protect the inner hole of the workpiece from spraying; on the other hand, the workpiece can be rotated by manually rotating the knurled end, which reduces labor intensity and improves production efficiency. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the present invention and the turbine workpiece;

[0011] As shown in the figure: 1. Threaded rod; 101. Knurled end; 102. Threaded end; 103. Cylindrical rod; 2. Upper end cap; 3. Lower end cap; 4. Sheath assembly; 401. Nut; 402. Threaded sheath; 5. Adjusting shim one; 6. Adjusting shim two. Detailed Implementation Example 1

[0012] The present invention will be further described in conjunction with the accompanying drawings, such as... Figure 1 As shown, a generator turbine spraying protection fixture includes a threaded rod 1, an upper end cover 2, and a lower end cover 3. One end of the threaded rod 1 is a knurled end 101, the other end is a threaded end 102, and the middle part is a cylindrical rod 103, with the diameter of the cylindrical rod 103 being slightly smaller than that of the knurled end 101. The upper end cover 2 is fitted over the threaded end 102, and a protective sleeve assembly 4 is installed above it. The lower end cover 3 is fitted over the cylindrical rod 103, and an adjusting shim 5 is installed below it. An adjusting shim 6 is installed inside the adjusting shim 5.

[0013] Furthermore, both the upper end cover 2 and the lower end cover 3 are disc-shaped parts, and each is composed of two discs, one large and one small. The large discs of the upper end cover 2 and the lower end cover 3 are used to seal the upper and lower end faces of the workpiece, respectively. The outer cylindrical surfaces of the small discs of the upper end cover 2 and the lower end cover 3 are used to mate with the inner holes at both ends of the workpiece.

[0014] Furthermore, the sheath assembly 4 is welded together with a nut 401 and a threaded sheath 402. The nut 401 is used to lock the upper end cover 2, and the threaded sheath 402 is used to protect the threaded end 102 from being sprayed.

[0015] Furthermore, both the first adjusting shim 5 and the second adjusting shim 6 are designed to adjust the vertical position of the workpiece on the threaded rod 1. When spraying workpieces of different lengths in the same series, the first adjusting shim 5 or the second adjusting shim 6 can be used selectively according to the length of the workpiece, or neither can be used.

Claims

1. A generator turbine spraying protection fixture, comprising a threaded rod (1), an upper end cap (2), and a lower end cap (3), characterized in that, The threaded rod (1) has a knurled end (101) at one end and a threaded end (102) at the other end, and a cylindrical rod (103) in the middle, with the diameter of the cylindrical rod (103) being slightly smaller than that of the knurled end (101); the upper end cap (2) is fitted over the threaded end (102), and a sheath assembly (4) is threadedly connected above it; the lower end cap (3) is fitted over the cylindrical rod (103), and an adjusting pad one (5) is installed below it, with an adjusting pad two (6) installed inside the adjusting pad one (5).

2. The generator turbine spraying protection fixture according to claim 1, characterized in that, The upper end cover (2) and the lower end cover (3) are both disc-type parts, and each is composed of two discs, one large and one small. The large discs of the upper end cover (2) and the lower end cover (3) are used to seal the upper and lower end faces of the workpiece, respectively. The outer cylindrical surfaces of the small discs of the upper end cover (2) and the lower end cover (3) are used to mate with the inner holes at both ends of the workpiece, respectively.

3. The generator turbine spraying protection fixture according to claim 1, characterized in that, The sheath assembly (4) is formed by welding a nut (401) and a threaded sheath (402). The nut (401) is used to lock the upper end cap (2), and the threaded sheath (402) is used to protect the threaded end (102) from being sprayed.

4. The generator turbine spraying protection fixture according to claim 1, characterized in that, The first adjusting shim (5) and the second adjusting shim (6) are designed to adjust the vertical position of the workpiece on the threaded rod (1). When spraying workpieces of different lengths in the same series, the first adjusting shim (5) or the second adjusting shim (6) can be used selectively according to the length of the workpiece, or neither can be used.

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