Guide ring structure of impulse turbine

Abstract

The utility model discloses a guide ring structure of an impulse turbine, which comprises a runner cone connected with a casing, the large diameter of the runner cone is upward, and a guide cylinder is detachably connected below the runner cone; and when the guide cylinder and the runner cone are disconnected, the guide cylinder and the runner cone can move up and down relatively. The runner cone of the flow guide ring directly falls on the premise that the rotating wheel is not disassembled, enough space for people to enter is provided between the machine shell and the runner cone, operation is efficient, the disassembling construction period and the reassembling construction period during overhauling are effectively shortened, and the overhauling efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine technical field especially, and it is a kind of impulse water turbine guide ring structure. BACKGROUND

[0002] The safe and stable operation of water guide bearing is an important guarantee for the safe and stable operation of water turbine unit. In order to ensure the safe and stable operation of the unit, it is necessary to frequently remove the guide ring for maintenance of the state of the water guide bearing, such as whether the oil drain at the bottom of the water guide bearing leaks, whether the seal of the water guide bearing needs to be replaced, whether the air supply metal hose of the water guide bearing is damaged, etc.

[0003] The guide ring is an important component of the impulse water turbine. During the operation of the impulse water turbine unit, the guide ring forms a closed space with the casing, guiding the water flow into the downstream draft tube, while preventing the water flow from impacting the flange end surface of the main shaft and splashing the water guide bearing. Due to the fact that the jet flow of the impulse water turbine is a sand-laden flow, and due to the negative pressure generated by the rotation of the main shaft, small particle impurities such as sand will inevitably be sucked into the space between the guide ring and the main shaft from the bottom of the guide ring, collide with the rotating main shaft, produce noise, and even large particles can get stuck in the gap between the guide ring and the main shaft, causing wear on the surface of the main shaft. At the same time, there are a large number of pipelines and bolt joint surfaces between the guide ring and the water guide bearing. During the operation of the unit, the falling bolts and nuts can also enter the space between the guide ring and the main shaft, colliding with the main shaft. These maintenance operations require frequent removal of the guide ring.

[0004] Currently, the existing guide ring of the impulse water turbine adopts a monolithic structure. During maintenance, the water turbine runner must be removed first, then the guide ring cylinder is removed after the runner is removed, and finally the water discharge cone is removed from the casing. This maintenance method not only has a complicated disassembly procedure, but also requires a lot of time for reassembly after maintenance is completed, resulting in a long disassembly and installation period during maintenance and a huge maintenance cost. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an impulse water turbine guide ring structure that can effectively shorten the maintenance period and is easy and efficient to operate, in view of the above problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] An impulse water turbine guide ring structure includes a water discharge cone connected to a casing, the large diameter of the water discharge cone faces upwards, and a guide cylinder is detachably connected below the water discharge cone. When the guide cylinder and the water discharge cone are disconnected, the guide cylinder and the water discharge cone can move up and down relative to each other.

[0008] Alternatively, the water discharge cone is composed of at least two conical petal units.

[0009] Alternatively, two sides of each of the conical segment units are provided with segment surfaces, and the segment surfaces of two adjacent conical segment units are connected.

[0010] Alternatively, the segment surfaces are located on the inner side of the conical segment units.

[0011] Alternatively, the upper part and the lower part of the flow guide cylinder are respectively provided with limiting parts for limiting the up-and-down movement of the water release cone.

[0012] Alternatively, the bottom of the water release cone is provided with a first connecting part, the top of the flow guide cylinder is provided with a second connecting part, and the first connecting part and the second connecting part are connected through a connecting piece.

[0013] Alternatively, the first connecting part has an upper plane, the second connecting part has a lower plane, the first connecting part is located above the second connecting part, the upper plane supports the lower plane, and the connecting piece sequentially passes through the first connecting part and the second connecting part upwards.

[0014] Alternatively, the bottom of the water release cone has an inner chamfer, and the bottom of the flow guide cylinder has an outer chamfer.

[0015] Alternatively, the inner chamfer and the outer chamfer have the same slope.

[0016] In summary, due to the adoption of the above technical scheme, the beneficial effects of the utility model are:

[0017] 1. The impact water turbine flow guide ring structure is convenient and efficient to operate, can effectively simplify the flow guide ring installation and maintenance procedures, and shorten the maintenance period.

[0018] 2. The impact water turbine flow guide ring structure can place the water release cone on the outer chamfer of the cylinder during installation, can reduce the height of the flow guide ring, reduce the hoisting frequency of the flow guide ring, hoist and transport the overall structure of the flow guide ring to the center of the shell at one time, effectively reduce the installation difficulty, and improve the installation efficiency.

[0019] 3. The impact water turbine flow guide ring structure directly drops the water release cone of the flow guide ring without removing the runner, provides sufficient access space between the shell and the water release cone, is efficient to operate, effectively shortens the removal construction period and the back loading construction period during maintenance, and greatly improves the maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be explained by examples and with reference to the drawings, wherein:

[0021] Figure 1 is the layout drawing of the utility model.

[0022] Figure 2 This is a schematic diagram of the structure of this utility model.

[0023] Figure 3 This is a schematic diagram of a cone-shaped unit.

[0024] Figure 4 This is a schematic diagram of the connection between the drainage cone and the guide tube.

[0025] The markings in the diagram are: 1-drain cone, 2-guide tube, 3-cone unit, 4-segmentation surface, 5-first connecting part, 6-second connecting part, 7-connector, 8-inner chamfer, 9-outer chamfer. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings.

[0027] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0028] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is merely one example of a series of equivalent or similar features.

[0029] A type of guide ring structure for an impulse turbine, such as Figures 1-4 As shown, it includes a drain cone 1 connected to the housing, with the larger diameter of the drain cone 1 facing upwards, and a guide tube 2 detachably connected to the lower part of the drain cone 1; when the connection between the guide tube 2 and the drain cone 1 is disconnected, the guide tube 2 and the drain cone 1 can move up and down relative to each other.

[0030] Specifically, the new guide ring adopts a modular design, separating the drain cone 1 and the guide cylinder 2. This allows for individual operation of either the drain cone 1 or the guide cylinder 2 during maintenance, reducing the complexity of the maintenance process. Since the guide cylinder 2 and the drain cone 1 are detachably connected, when maintenance is required, simply disassembling the connection allows for relative vertical movement of the guide cylinder 2 and the drain cone 1 without removing the rotating wheel, greatly simplifying the maintenance process. After disconnecting the drain cone 1 from the casing, the drain cone 1 falls to the bottom of the guide cylinder 2. At this point, the guide ring is a certain distance from the top of the casing, allowing maintenance personnel to enter the guide ring for maintenance.

[0031] As another specific embodiment, the water release cone 1 is composed of at least two cone segment units 3. The water release cone 1 is composed of multiple cone segment units 3, which can be individually or in groups disassembled and assembled when the water release cone 1 or other components connected thereto needs to be overhauled, without having to completely disassemble the entire water release cone 1, which can significantly improve the efficiency of the overhaul. If a cone segment unit 3 of the water release cone 1 is damaged, the unit can be replaced individually without having to replace the entire water release cone 1, which can save materials and costs.

[0032] As another specific embodiment, each cone segment unit 3 is provided with a split surface 4 on both sides, and the two adjacent cone segment units 3 are connected through the split surface 4. The design of the split surface 4 allows each cone segment unit 3 to be assembled together like a puzzle, forming a complete water release cone 1 structure. Since the cone segment units 3 are connected through the split surface 4, only the correct alignment and fixation of each unit need to be ensured during installation, simplifying the overall installation process. Figure 1

[0033] As another specific embodiment, the split surface 4 is located on the inner side of the cone segment unit 3. It ensures that the water flow on the outside is smooth and will not be hindered by the split surface 4 of the water release cone 1, improving the water release efficiency of the water release cone 1.

[0034] As another specific embodiment, the upper and lower parts of the flow guide cylinder 2 are respectively provided with limiting parts for limiting the upward and downward movement of the water release cone 1. Even in the state of not installing the flow guide ring, the flow guide cylinder 2 and the water release cone 1 are not separated, preventing the water release cone 1 from accidentally falling off when the flow guide ring is not installed, reducing the risk of safety accidents caused by loose parts. The installation and disassembly process becomes more simple and fast, reducing the complex steps during installation. When the water release cone 1 needs to be overhauled, the limiting parts can quickly locate the position of the water release cone 1, facilitating the repair work.

[0035] As another specific embodiment, the bottom of the water release cone 1 is provided with a first connecting part 5, the top of the flow guide cylinder 2 is provided with a second connecting part 6, and the first connecting part 5 and the second connecting part 6 are connected through a connecting piece 7. The water release cone 1 and the flow guide cylinder 2 are tightly connected through the connecting piece 7, improving the stability of the entire structure and reducing the vibration during operation.

[0036] ​As another specific embodiment, the first connecting part 5 has an upper plane, the second connecting part 6 has a lower plane, the first connecting part 5 is above the second connecting part 6, the upper plane supports the lower plane, and the connecting piece 7 passes through the first connecting part 5 and the second connecting part 6 in turn upwards. The upper plane of the first connecting part 5 supports the lower plane of the second connecting part 6, forming a stable vertical support structure, which helps to disperse and bear the pressure and impact from the water flow. The contact area of the upper plane and the lower plane is large, which helps to evenly distribute the force to the two connecting parts, reduces local stress concentration, and improves the durability of the structure. When the connecting piece 7 needs to be replaced or other maintenance work is needed, the connecting piece 7 can be easily disassembled and reinstalled due to its installation method. The first connecting part 5 and the second connecting part 6 can not only connect the water release cone 1 and the flow guide cylinder 2, but also limit the up and down movement of the water release cone 1, realizing the integration of structure and function and simplifying the overall design. Among them, the second connecting part 6 serves as the upper limiting part of the flow guide cylinder 2.

[0037] As another specific embodiment, the bottom of the water release cone 1 has an inner chamfer 8, and the bottom of the flow guide cylinder 2 has an outer chamfer 9. The chamfer design can serve as a guide to help the water release cone 1 accurately align and fall into position, improving installation accuracy. And prevent damage to the water release cone 1 and the flow guide cylinder 2 during disassembly and installation.

[0038] As another specific embodiment, the inner chamfer 8 and the outer chamfer 9 have the same slope. The matching accuracy between the water release cone 1 and the flow guide cylinder 2 is improved. Since the slopes are the same, the water release cone 1 is easier to align with the position of the flow guide cylinder 2 during hoisting, reducing the difficulty of adjustment and alignment. When the water release cone 1 falls into position, since the slopes are consistent, it can ensure that the force is evenly distributed in the same direction, reducing the concentrated pressure on a certain part.

[0039] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application extends to any new features or any new combinations disclosed in the specification, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the details of the technical features not disclosed in the present embodiment, such as specific structure, connection method, etc., can be obtained from the prior art by those skilled in the art, and the present disclosure does not specifically limit it.

Claims

1. A structure of a guide ring of an impulse water turbine, characterized by: The water outlet cone (1) is connected with the casing, the diameter of the water outlet cone (1) is upward, and a flow guide cylinder (2) is detachably connected below the water outlet cone (1); when the flow guide cylinder (2) is disconnected with the water outlet cone (1), the flow guide cylinder (2) and the water outlet cone (1) can be relatively moved up and down.

2. The Pelton turbine guide ring structure according to claim 1, wherein: The water outlet cone (1) is composed of at least two cone petal units (3).

3. The Pelton turbine guide ring structure of claim 2, wherein: Both sides of each cone petal unit (3) is provided with a split surface (4), and the adjacent two cone petal units (3) are butted through the split surface (4).

4. The Pelton turbine guide ring structure of claim 3, wherein: The split surface (4) is located on the inner side of the cone petal unit (3).

5. The Pelton turbine bucket structure of claim 1, wherein: The upper part and the lower part of the flow guide cylinder (2) are respectively provided with a limiting part for limiting the up and down movement of the water outlet cone (1).

6. The Pelton turbine bucket structure of claim 1, wherein: The bottom of the water outlet cone (1) is provided with a first connecting part (5), the top of the flow guide cylinder (2) is provided with a second connecting part (6), and the first connecting part (5) and the second connecting part (6) are connected through a connecting piece (7).

7. The Pelton turbine guide ring structure of claim 6, wherein: The first connecting part (5) has an upper plane, the second connecting part (6) has a lower plane, the first connecting part (5) is located above the second connecting part (6), the upper plane supports the lower plane, and the connecting piece (7) passes through the first connecting part (5) and the second connecting part (6) in sequence upward.

8. The Pelton turbine guide ring structure of claim 1, wherein: The bottom of the water outlet cone (1) has an inner chamfer (8), and the bottom of the flow guide cylinder (2) has an outer chamfer (9).

9. The Pelton turbine guide ring structure of claim 8, wherein: The inclination of the inner chamfer (8) and the outer chamfer (9) is the same.

Images