CN216518374U - L-shaped expansion joint structure of tubular turbine unit - Google Patents

Abstract

The utility model relates to the technical field of hydraulic turbine mechanical equipment, in particular to an L-shaped telescopic joint structure of a tubular turbine set, which comprises a telescopic joint, a base ring and a runner chamber, wherein the telescopic joint is arranged on one side of the runner chamber, the telescopic joint is connected with the runner chamber through a connecting bolt, the base ring is arranged at the lower end of the telescopic joint, the base ring and the telescopic joint are tightly attached to each other, a sealing groove is formed in the lower end of the telescopic joint, a rubber strip for sealing is arranged in the sealing groove, and an adjusting bolt is arranged at the upper end of the telescopic joint and used for adjusting a fit clearance between the telescopic joint and the base ring. The utility model not only can ensure the rigidity of the telescopic joint, but also can ensure the sealing effect, and the telescopic joint sealing adopts a scheme of two sealing and proper packing, namely, the proper packing is added at the sealing groove B for compensation filling, thereby further enhancing the sealing effect. This structure helps guaranteeing telescopic joint structural performance and sealing performance.

Description

L-shaped expansion joint structure of tubular turbine unit

Technical Field

The utility model relates to the technical field of hydraulic turbine mechanical equipment, in particular to an L-shaped telescopic joint structure of a tubular turbine set.

Background

At present, the through-flow turbine is a horizontal shaft turbine, namely, the water flow moves along a horizontal axial direction in a flow passage. The water-saving type hydraulic power station is mainly suitable for a water head of 1-25 m and is a special machine type for a low-water-head and large-flow hydropower station. Because the water flow moves along the axial direction basically in the flow channel and does not turn, the water passing capacity and hydraulic efficiency of the unit can be improved. The device is particularly suitable for tidal power stations, and the functions of bidirectional power generation, bidirectional water pumping, bidirectional water drainage and the like are very suitable for comprehensively utilizing low-water-head hydraulic resources. The through-flow turbine is suitable for low water head application, high in efficiency, low in investment, fast in development and larger in power, can be divided into a full-through-flow type and a half-through-flow type (also divided into a shaft type, a shaft extension type and a bulb type) according to the structural characteristics and the arrangement type, has different application ranges, is provided with a generator rotor on a rotating turbine runner rim, and a generator stator is fixed on a support around the outside of a runner. Meanwhile, the arrangement form of the flow channel and the units is suitable for reversible units and can also be used for pumping and storing energy, the upstream and downstream water reservoirs of the runoff cascade power station are used as the upstream and downstream reservoirs of the pumping and storing power station, and the common power station can be built into a mixed hydropower station which can pump and store energy and generate electricity by utilizing the original hydraulic construction and electromechanical equipment, so that the compensation effect of the runoff power station in a power system is improved; the tubular unit can also be used in irrigation and drainage stations, thus achieving the double benefits of drainage and power generation. The shaft-extending through-flow type water turbine generator set adopts horizontal arrangement and is also obliquely installed, the water turbine part mainly comprises a runner chamber, a runner, a guide vane, a control mechanism and an S-shaped tail water pipe, and a main shaft of the runner penetrates out of the tail water pipe and is connected to a generator. Because the low-rotation-speed generator is large in size and expensive, the small through-flow type hydroelectric generating set mostly adopts a form that a gear is accelerated to drive a high-speed generator; the shaft through-flow turbine is characterized in that a generator set is installed in a concrete shaft on the upstream side of the turbine, the turbine mainly comprises a guide vane mechanism, a runner chamber, a runner and a draft tube, and a main shaft of the runner extends into the concrete shaft and is connected to a generator through a speed increasing device such as a gear box. The generator is also arranged in a workshop on the top, a main shaft of a rotating wheel is connected with the generator through a sector gear or a belt pulley, so that the size of a vertical shaft is smaller, the well through-flow type turbine unit has simple structure, low manufacturing cost and convenient operation and maintenance, but the efficiency is lower, the application is wider in a low-head small hydropower station, the generator of the bulb through-flow type turbine unit is hermetically arranged in a bulb-shaped metal shell at the upstream side of the turbine and is arranged in the horizontal direction, the main shaft of the engine is directly connected with a rotating wheel of the turbine, and the turbine part of the bulb through-flow type turbine unit consists of a rotating wheel chamber, a guide vane mechanism, a rotating wheel and a tail water pipe; the generator shaft is directly connected to the rotating wheel and is installed on the steel bulb shell together, the generator is arranged in the bulb shell, the rotating wheel is arranged at the tail end of the bulb, the generator bearing is fixed on the bulb shell through the bearing support ring, the rotating wheel end bearing is fixed on the bulb tail end shell, and the front end of the generator shaft is connected to the oil circuit device for controlling the variable pitch of the motor slip ring and the rotating wheel. The steel bulb is fixed in the concrete foundation through the upper pillar and the lower pillar, the upper pillar is also a passage for people to go in and out of the bulb, the bulb tubular unit is a machine type widely applied to large and medium-sized units at present, and a water flow passage of the bulb tubular unit is axial or slightly inclined. The bulb body is located on the upstream of the turbine runner, and the water distributor is conical. The generator rotor is directly coupled to the turbine shaft, which is supported by two guide bearings. The bulb turbine operates at a lower rotational speed.

At present, the expansion joint is sealed as a key water leakage point of a plurality of through-flow units, the expansion joint in the traditional structure adopts a single-plate structure, three rubber strips are sealed, but the single-plate structure has poor rigidity and is easy to deform, so that the clearance between the expansion joint and a base ring as well as a runner chamber is continuously increased, and the water leakage is increased.

Therefore, an L-shaped expansion joint structure of a tubular unit is particularly provided to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the existing scheme, the utility model provides the L-shaped telescopic joint structure of the tubular unit, and the utility model not only can ensure the rigidity of the telescopic joint, but also can ensure the sealing effect. The telescopic joint is sealed and adopts the scheme that the suitable type packing is added in twice, namely the suitable type packing is added in the position of the sealing groove B for compensation and filling, and the sealing effect is further enhanced.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a tubular unit L type telescopic joint structure, includes telescopic joint, foundation ring and runner room, the telescopic joint sets up one side of runner room, the telescopic joint with link to each other through connecting bolt between the runner room, the foundation ring sets up the lower extreme of telescopic joint, hug closely each other between foundation ring and the telescopic joint, seted up the seal groove at the lower extreme of telescopic joint, install in the seal groove and be used for sealed rubber strip.

Furthermore, adjusting bolts are installed at the upper ends of the telescopic joints and used for adjusting fit gaps between the telescopic joints and the foundation ring.

Furthermore, two sealing grooves are formed, namely a sealing groove A and a sealing groove B, and adaptive packing is filled in the sealing groove B in a compensating mode.

Further, the telescopic joint is L-shaped.

The utility model has the advantages that: the utility model provides an L-shaped telescopic joint structure of a tubular unit, wherein the telescopic joint adopts an L-shaped structure, and an adjusting bolt is additionally arranged for adjusting the fit clearance between the telescopic joint and a base ring, so that the rigidity of the telescopic joint can be ensured, and the sealing effect is also ensured. The telescopic joint is sealed and adopts the scheme that the suitable type packing is added in twice, namely the suitable type packing is added in the position of the sealing groove B for compensation and filling, and the sealing effect is further enhanced. This structure helps guaranteeing telescopic joint structural performance and sealing performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the telescopic joint of the present invention;

FIG. 3 is a schematic structural view of a telescopic joint A;

FIG. 4 is a schematic structural view of a telescopic joint B;

FIG. 5 is a schematic diagram of a prior art configuration;

wherein:

1. an expansion joint; 2. A foundation ring; 3. Adjusting the bolt;

4. a runner chamber; 5. A rubber strip; 6. A connecting bolt;

7. a proper packing; 8. A sealing groove A; 9. And a seal groove B.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly specified or limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a schematic structural diagram of an expansion joint 1 in the present invention, fig. 3 is a schematic structural diagram of a position of an expansion joint 1A, fig. 4 is a schematic structural diagram of a position of an expansion joint 1B, and fig. 1, fig. 2, fig. 3 and fig. 4 show an L-shaped expansion joint structure of a tubular turbine unit, which includes an expansion joint 1, a base ring 2 and a runner chamber 4, the expansion joint 1 is disposed on one side of the runner chamber 4, the expansion joint 1 and the runner chamber 4 are connected by a connecting bolt 6, the base ring 2 is disposed at a lower end of the expansion joint 1, the base ring 2 and the expansion joint 1 are tightly attached to each other, a sealing groove is disposed at a lower end of the expansion joint 1, and a rubber strip 5 for sealing is disposed in the sealing groove, so that a good sealing effect can effectively prevent the problem of water leakage of the tubular turbine unit.

Example 2:

fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a schematic structural diagram of an expansion joint 1 in the present invention, fig. 3 is a schematic structural diagram of a position of an expansion joint 1A, fig. 4 is a schematic structural diagram of a position of an expansion joint 1B, and fig. 1, fig. 2, fig. 3 and fig. 4 show an L-shaped expansion joint structure of a tubular unit, the expansion joint 1 is L-shaped, an adjusting bolt 3 is installed at the upper end of the expansion joint 1, the adjusting bolt 3 is used for adjusting a fit clearance between the expansion joint 1 and a foundation ring 2, the fit clearance between the expansion joint 1 and the foundation ring 2 can be adjusted by adjusting the tightness of the adjusting bolt 3, and the seal effect is ensured while the adjustment is convenient.

Example 3:

fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a schematic structural diagram of an expansion joint 1 of the present invention, fig. 3 is a schematic structural diagram of an expansion joint 1A, fig. 4 is a schematic structural diagram of an expansion joint 1B, and as shown in fig. 1, fig. 2, fig. 3 and fig. 4, two sealing grooves are formed in the L-shaped expansion joint structure of a tubular unit, the sealing grooves are respectively a sealing groove A8 and a sealing groove B9, and a conformable packing 7 is filled in the sealing groove B9 in a compensating manner, so as to further improve the sealing effect, the packing is also called a sealing packing and is usually woven by a softer linear object, the conformable packing 7 in the present invention is filled in the sealing groove B9 by a strip object, so as to achieve the sealing effect, the packing is made of graphite as a main material, and can be reinforced by carbon fiber, copper wire, nickel alloy wire and other materials according to different requirements,

the adaptive packing 7 is arranged in the sealing groove B9 by packing, and can also compress the packing in the sealing groove B9 by a packing gland, when the water leakage problem occurs, the water medium is throttled by the adaptive packing 7 for many times, the sealing is achieved by virtue of the labyrinth effect, and the water leakage problem of the expansion joint 1 of the tubular turbine unit can be effectively solved.

The new structure developed is adopted in a plurality of units, is really feasible and scientific. From the practical operation effect, the expected effect can be achieved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (2)

1. The utility model provides a tubular unit L type telescopic joint structure, includes telescopic joint (1), basic ring (2) and runner room (4), its characterized in that: expansion joint (1) sets up one side of runner room (4), expansion joint (1) with link to each other through connecting bolt (6) between runner room (4), basic ring (2) set up the lower extreme of expansion joint (1), hug closely each other between basic ring (2) and expansion joint (1), seted up the seal groove at the lower extreme of expansion joint (1), install rubber strip (5) that are used for sealed in the seal groove, adjusting bolt (3) are installed to the upper end of expansion joint (1), and adjusting bolt (3) are used for adjusting the fit clearance between expansion joint (1) and basic ring (2), two have been seted up to the seal groove, are seal groove A (8) and seal groove B (9) respectively, and the compensation packing has suitable type packing (7) in seal groove B (9).

2. The L-shaped telescopic joint structure of the tubular unit as claimed in claim 1, wherein: the telescopic joint (1) is L-shaped.

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