Online filling type generator cold water inlet support

Abstract

The utility model relates to generator water inlet support technical field more specifically, relate to a kind of on-line filling type generator cold water inlet support of loading.A kind of on-line filling type generator cold water inlet support of loading, the water inlet support is sleeved in the outside of generator cold water pipe, water inlet support is connected with water inlet pipe, water inlet support includes support shell, packing, support flange and packing fixing ring assembly, the end of water inlet support close to water inlet pipe is provided with connecting flange, water inlet support is connected with water inlet pipe by connecting flange, packing is arranged in the packing chamber between support shell and generator cold water pipe, packing fixing assembly is arranged on water inlet support, support flange is arranged on support shell by flange bolt, support flange bottom is inserted into the packing chamber between support shell and generator cold water pipe and is arranged.The support prevents rotor cooling water leakage, ensures that unit can be safely and stably operated.The utility model mainly applies to on-line filling type generator cold water inlet support aspect.

Description

Technical Field

[0001] This utility model relates to the technical field of generator inlet support, and more specifically, to an online filling type generator cold water inlet support. Background Technology

[0002] The rotor windings of the dual water-cooled steam turbine generator are water-cooled. The rotor windings are all made of hollow copper wire and cooled by water. Each slot of the rotor has two rows of coils, and each row of coils is a water channel. Water enters at the bottom coil and exits at the top coil. All water channels are connected to an insulated polytetrafluoroethylene pipe reinforced with stainless steel wire. Because water has a high specific heat and can directly carry away heat, the efficiency of the generator can be improved. A generator water inlet support is designed at the rotor water inlet end. The generator water inlet support short circuit is located at the excitation end. The dynamic and static seal between the generator water inlet support and the rotor water inlet pipe is achieved through packing. Under long-term operation, the rotating water inlet short circuit rubs against the stationary packing, causing an irregular depth groove on the outer ring of the water inlet short circuit. The position of the groove on the short circuit increases due to the axial expansion of the rotor. The inlet packing is subjected to high temperature and high pressure water flow, impurities in the water such as sand and metal oxides, and abnormal pH of the water, which corrode the packing material. This causes varying degrees of wear to the packing, resulting in packing compression and seal failure. It is unable to effectively seal the cooling water in both moving and stationary states, causing the cooling water to leak through the gap between the moving and stationary states. The unit cannot be replaced online during operation. When the cooling water leakage is severe, the bearing housing insulation gasket becomes damp, which can easily cause the shaft current to form a loop. At the same time, severe water leakage will cause the rotor water tank to fail to maintain the normal liquid level, resulting in unit accident shutdown. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides an online-mounted packing-type generator cooling water inlet support. This support prevents rotor cooling water leakage and ensures the safe and stable operation of the unit.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An online-installed packing-type generator cooling water inlet support is disclosed. The inlet support is sleeved outside the generator cooling water pipe and connected to the inlet pipe. The inlet support includes a support housing, packing, a support flange, and a packing fixing ring assembly. A connecting flange is provided at one end of the inlet support near the inlet pipe, connecting the inlet support to the inlet pipe. The packing is disposed in the packing chamber between the support housing and the generator cooling water pipe. The packing fixing assembly is disposed on the inlet support to tighten the packing. The support flange is mounted on the support housing by flange bolts, and the bottom of the support flange extends into the packing chamber between the support housing and the generator cooling water pipe.

[0005] The packing retainer assembly includes a top pressure ring and a top pressure screw. The top pressure ring is disposed in the packing chamber between the bearing housing and the generator cooling water pipe. The top pressure ring is pressed against the outside of the packing. The bearing housing has multiple threaded holes equidistantly spaced along the circumference. The top pressure screw is disposed in the threaded holes, and one end of the top pressure screw extending into the threaded hole is pressed against the outside of the top pressure ring.

[0006] The outer edge of the top pressure ring is set at a 60-degree bevel.

[0007] The top pressure ring is made of brass.

[0008] The distance between the outer diameter of the top pressure ring and the outer shell of the support is 0.1 mm, and the distance between the inner diameter of the top pressure ring and the generator cooling water pipe is 2 mm.

[0009] The support housing and the support flange are provided with corresponding concentric holes, and the flange bolts are installed through the concentric holes to control the movement of the support flange.

[0010] The support flange is provided with a slide plate assembly. The slide plate assembly includes an L-shaped slide plate adjusting plate, a rotary adjusting screw, and an annular slide plate. An annular groove is formed at the end of the support flange near the packing chamber, and the annular slide plate is movably disposed in the annular groove. One end of the L-shaped slide plate adjusting plate is fixedly disposed on the side of the annular slide plate away from the packing chamber, and the other end of the L-shaped slide plate adjusting plate extends out of the support flange. Multiple sets of L-shaped slide plate adjusting plates are evenly spaced along the circumference of the annular slide plate. The annular slide plate is provided with a strip groove that meets the requirements of the L-shaped slide plate adjusting plate. One end of the rotary adjusting screw is rotatably disposed on the support flange, and the other end of the rotary adjusting screw passes through the L-shaped slide plate adjusting plate. The L-shaped slide plate adjusting plate is provided with a threaded hole corresponding to the rotary adjusting screw.

[0011] The edge of the generator cooling water pipe near the water inlet support has an arc-shaped opening.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The split-type support flange and detachable flange bolts allow for direct removal of the support flange and replacement of the packing without disassembling the generator cooling water pipes and inlet pipes. This significantly shortens maintenance time, ensures continuous generator operation, and reduces power generation losses due to downtime. The 60° bevel of the outer edge of the pressure ring matches the pressure screw, enabling uniform packing tightening at a single point, avoiding the cumbersome operation of traditional multi-bolt methods. The precise clearance design between the pressure ring, the support shell, and the cooling water pipes prevents friction between moving and stationary parts and ensures uniform pressure on the packing, improving sealing reliability. When replacing the packing, an L-shaped insert plate is pushed out to form a flow channel, allowing the new packing to slide precisely into the packing chamber. This device overcomes the industry pain point of requiring downtime for replacing traditional generator cooling water pipe packing, achieving "online, fast, and low-cost" maintenance while ensuring sealing reliability, significantly improving the economy and availability of the power generation system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the insert plate assembly in this utility model; Figure 4 This is a schematic diagram showing the L-shaped insert adjustment plate in this utility model; Figure 5 This is a schematic diagram showing the position of the annular insert plate in this utility model; Figure 6 This is a schematic diagram showing the location of the water inlet in this utility model; Figure 7 This is a side view of the top pressure ring in this utility model; In the diagram: 1 is the generator cooling water pipe, 2 is the water inlet pipe, 3 is the packing, 4 is the support shell, 5 is the connecting flange, 6 is the support flange, 7 is the top pressure ring, 8 is the top pressure screw, 9 is the flange bolt, 10 is the L-shaped insert plate adjustment plate, 11 is the rotating adjustment screw, and 12 is the annular insert plate. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0016] like Figures 1 to 4 As shown, an online-installed packing-type generator cooling water inlet support is disclosed. This inlet support is fitted onto the outside of the generator cooling water pipe 1 and connected to the inlet pipe 2. The inlet support includes a support housing 4, packing 3, a support flange 6, and a packing fixing ring assembly. A connecting flange 5 is provided at the end of the inlet support near the inlet pipe 2, connecting the inlet support to the inlet pipe 2. The packing 3 is disposed in the packing chamber between the support housing 4 and the generator cooling water pipe 1. The packing fixing assembly is disposed on the inlet support to tighten the packing 3. The support flange 6 is mounted on the support housing 4 by flange bolts 9, with its bottom extending into the packing chamber between the support housing 4 and the generator cooling water pipe 1. The outer side of the end of the support flange 6 extending into the packing chamber has an arc-shaped surface to ensure smooth installation when the support flange 6 contacts the packing during online packing replacement.

[0017] A circumferentially protruding buffer ring is provided at the 5-diameter connection flange to buffer the radial clearance of the rotating shaft directly impacted by the inlet water pressure, and to prevent direct impact on the packing between the rotor and the inlet support.

[0018] After the outer casing 4 is installed, the packing in the packing chamber is fixed using the packing retaining ring assembly. When replacing the packing packing 3, the support flange 6 is removed by the flange bolts 9 and exposed to a certain distance, and the new packing packing 3 is added to the packing chamber.

[0019] Preferably, the packing retaining ring assembly includes a top pressure ring 7 and a top pressure screw 8. The top pressure ring 7 is disposed in the packing chamber between the support housing 4 and the generator cooling water pipe 1. The top pressure ring 7 is pressed against the outside of the packing 3. The support housing 4 has multiple threaded holes equidistantly opened along the circumference. The top pressure screw 8 is disposed in the threaded holes, and one end of the top pressure screw 8 extending into the threaded hole is pressed against the outside of the top pressure ring 7.

[0020] Preferably, the outer edge of the top pressure ring 7 is set at a 60-degree bevel. This facilitates the tightening and fixing of the top pressure ring 7 by the top pressure screw 8. The outer edge of the top pressure ring 7 and the top pressure screw 8 form a straight line, ensuring effective tightening of the top pressure ring when replacing the packing and preventing water pressure from scattering the packing.

[0021] The support housing 4 has three sets of water inlets equidistantly arranged around the top pressure ring 7.

[0022] Preferably, the pressure ring 7 is made of brass. The thickness of the pressure ring 7 is 5mm.

[0023] Preferably, the distance between the outer diameter of the top pressure ring 7 and the housing 4 of the support is 0.1 mm, and the distance between the inner diameter of the top pressure ring 7 and the generator cooling water pipe 1 is 2 mm. This prevents dynamic and static contact and abrasion.

[0024] Preferably, concentric holes are provided on the support housing 4 and the support flange 6, and flange bolts 9 are provided through the concentric holes to control the movement of the support flange 6.

[0025] Preferably, the support flange 6 is provided with a slide plate assembly.

[0026] Preferably, the insert plate assembly includes an L-shaped insert plate adjusting plate 10, a rotary adjusting screw 11, and an annular insert plate 12. An annular groove is provided at one end of the support flange 6 near the packing chamber, and the annular insert plate 12 is movably disposed in the annular groove. One end of the L-shaped insert plate adjusting plate 10 is fixedly disposed on the side of the annular insert plate 12 away from the packing chamber, and the other end of the L-shaped insert plate adjusting plate 10 extends out of the support flange 6. Multiple sets of L-shaped insert plate adjusting plates 10 are equally spaced along the circumference of the annular insert plate 12. A strip groove is provided in the annular insert plate 12 to meet the requirements of the L-shaped insert plate adjusting plate 10. One end of the rotary adjusting screw 11 is rotatably disposed on the support flange 6, and the other end of the rotary adjusting screw 11 passes through the L-shaped insert plate adjusting plate 10. A threaded hole is provided on the L-shaped insert plate adjusting plate 10 corresponding to the rotary adjusting screw 11. The L-shaped insert plate 10 and the annular insert plate 12 are fitted together to ensure that the side of the support flange 6 near the packing is a solid circle. When the packing is added online, the packing can fit against the surface of the annular insert plate 12 to prevent the packing 3 from touching the rotating generator cooling water pipe 1.

[0027] The annular insert plate 12 and the L-shaped insert plate adjusting plate 10 are designed as an integrated structure. The annular insert plate 12 is embedded inside the support flange 6. The fit clearance between the annular insert plate 12 and the support flange 6 is 0.1mm to prevent the annular insert plate 12 from directly rubbing against the rotor when it is pushed out. The thickness of the support flange 6 near the rotor end is 3mm. When the packing is replaced, the L-shaped insert plate adjusting plate 10 is pushed out into place, and the packing can make close contact with the annular insert plate 12. Under the operation of tightening the rotating adjusting screw 11, it can smoothly slide into the support housing 4.

[0028] Preferably, the edge of the generator cooling water pipe 1 near the water inlet support is designed with an arc-shaped opening to prevent jamming during installation of the support housing 4.

[0029] After the packing 3 is installed, it is fixed in place using the top pressure ring 7. When replacing the packing packing 3 online, the support flange 6 is pulled out by the flange bolts 9, leaving a certain distance exposed. When replacing the packing, the annular insert plate 12 is pushed out by the L-shaped insert plate adjusting plate 10, and the packing 3 is installed in place. The packing can fit against the surface of the annular insert plate 12, preventing the packing 3 from touching the rotating generator cooling water pipe 1. The support flange 6 is moved towards the packing chamber by the flange bolts 9 to press the packing 3 until the packing 3 is squeezed and fixed. A sealing treatment is applied between the L-shaped insert plate adjusting plate 10 and the support flange 6.

[0030] The above description only details the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. An online packing type generator cold water inlet support, the inlet support being sleeved outside a generator cold water pipe (1), the inlet support being connected with a water inlet pipe (2), characterized in that: The water inlet support includes a support shell (4), packing (3), support flange (6), and packing fixing ring assembly. A connecting flange (5) is provided at one end of the water inlet support near the water inlet pipe (2). The water inlet support is connected to the water inlet pipe (2) through the connecting flange (5). The packing (3) is provided in the packing chamber between the support shell (4) and the generator cooling water pipe (1). The packing fixing assembly is provided on the water inlet support to tighten the packing (3). The support flange (6) is provided on the support shell (4) through flange bolts (9). The bottom of the support flange (6) extends into the packing chamber between the support shell (4) and the generator cooling water pipe (1). ​ 2. An online refueling generator cold water inlet support according to claim 1, characterized in that: The packing ring assembly includes a top pressure ring (7) and a top pressure screw (8). The top pressure ring (7) is disposed in the packing chamber between the support housing (4) and the generator cooling water pipe (1). The top pressure ring (7) is pressed against the outside of the packing (3). The support housing (4) has multiple threaded holes equidistantly spaced along the circumference. The top pressure screw (8) is disposed in the threaded holes. One end of the top pressure screw (8) extends into the threaded hole and is pressed against the outside of the top pressure ring (7).

3. An online refueling generator cold water inlet support according to claim 2, characterized in that: The outer edge of the top pressure ring (7) is set at a 60-degree angle.

4. An online refueling generator cold water inlet support according to claim 2, characterized in that: The top pressure ring (7) is made of brass.

5. An online refueling generator cold water inlet support according to claim 2, characterized in that: The distance between the outer diameter of the top pressure ring (7) and the outer shell of the support (4) is 0.1 mm, and the distance between the inner diameter of the top pressure ring (7) and the generator cooling water pipe (1) is 2 mm.

6. An online refueling generator cold water inlet support according to claim 1, characterized in that: The support housing (4) and the support flange (6) are provided with concentric holes, and the flange bolts (9) are provided through the concentric holes to control the movement of the support flange (6).

7. An online refueling generator cold water inlet support according to claim 6, characterized in that: The support flange (6) is provided with a plate assembly.

8. An online refueling generator cold water inlet support according to claim 7, characterized in that: The insert plate assembly includes an L-shaped insert plate adjusting plate (10), a rotary adjusting screw (11), and an annular insert plate (12). The support flange (6) has an annular groove at one end near the packing chamber. The annular insert plate (12) is movably disposed in the annular groove. One end of the L-shaped insert plate adjusting plate (10) is fixedly disposed on the side of the annular insert plate (12) away from the packing chamber. The other end of the L-shaped insert plate adjusting plate (10) extends out of the support flange (6). Multiple sets of L-shaped insert plate adjusting plates (10) are equally spaced along the circumference of the annular insert plate (12). The annular insert plate (12) has a strip groove that satisfies the L-shaped insert plate adjusting plate (10). One end of the rotary adjusting screw (11) is rotatably disposed on the support flange (6). The other end of the rotary adjusting screw (11) passes through the L-shaped insert plate adjusting plate (10). The L-shaped insert plate adjusting plate (10) has a threaded hole corresponding to the rotary adjusting screw (11).

9. An online refueling generator cold water inlet support according to claim 1, characterized in that: The generator cooling water pipe (1) has an arc-shaped pipe opening at one end near the water inlet support.

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