A throat structure of the condenser of a low-pressure inner cylinder floor-standing steam turbine unit
A technology for steam turbine units and condensers, which is used in steam/steam condensers, heat exchanger shells, lighting and heating equipment, etc., and can solve the problems of poor aerodynamic performance, unreasonable stress distribution and complex structure at the throat of the condenser. problems, to meet the strength requirements, the structure is simple, and the effect of improving the stress situation
Active Publication Date: 2021-07-16
DONGFANG TURBINE CO LTD
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Problems solved by technology
Due to the large exhaust port of the low-pressure cylinder, taking a 660MW two-exhaust steam unit as an example, the combined force of the gravity load and vacuum force of the low-pressure cylinder can reach 7450kN; the huge atmospheric pressure puts forward higher requirements for the structural strength of the condenser throat. If the traditional condenser throat structure is still used, in order to meet the high strength requirements brought by the floor model of the inner cylinder, it is necessary to use thicker support rods and add additional support rods for reinforcement, not only the structure is complex, but the weight is heavy , the stress distribution is unreasonable during operation, and the aerodynamic performance of the condenser throat is also poor
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Embodiment 1
[0029] In this embodiment, a structure for the condenser throat 2 of a steam turbine set with a floor-standing low-pressure inner cylinder is specifically provided, which is suitable for a floor-standing model of a low-pressure inner cylinder of a steam turbine, such as figure 1 As shown, they are arranged sequentially from the upper part to the lower part, the low-pressure outer cylinder 1, the condenser throat 2, the condenser shell 3, and the low-pressure heater 4 is arranged on the condenser throat 2.
[0030] The above-mentioned condenser throat 2 includes a trapezoidal platform shell with openings at both ends and a hollow structure. The trapezoidal platform shell is surrounded by two shell side plates 5 and two shell end plates 6, and the shell side plates 5 and shell end plates 6 The connection side adopts the way of welding connection. The small end port of the trapezoidal platform shell is connected with a throat top plate 13, which is equivalent to forming the inner...
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The invention discloses a condenser throat structure of a floor-mounted steam turbine unit with a low-pressure inner cylinder, which belongs to the technical field of steam turbines in thermal power plants, and comprises a trapezoidal shell with two ends open and a hollow structure, and a small end port of the trapezoidal shell The throat top plate is connected, and the other side of the throat top plate is connected to the exhaust port of the low-pressure cylinder, and the inside of the trapezoidal platform shell is provided with a matching derrick structure; the side of the derrick structure is connected to the inside of the trapezoidal platform shell One end of the derrick structure is connected to the throat top plate, and the other end is connected to a bearing frame, and the carrier frame is connected to the inner side wall of the trapezoidal platform shell; it also includes a channel that runs through the trapezoidal platform shell and the derrick structure, and the channel is used for arranging A low-pressure heater is used to achieve the purpose of having a simple structure and good aerodynamic performance while meeting the strength requirements.
Description
technical field [0001] The invention belongs to the technical field of steam turbines in a thermal power plant, and relates to the structural design of a steam turbine condenser in a thermal power plant, in particular to a throat structure of a condenser of a steam turbine set with a low-pressure inner cylinder. Background technique [0002] The traditional landing method of the low-voltage module of thermal power steam turbine is that the low-pressure bearing is seated on the low-pressure outer cylinder, and the low-pressure outer cylinder is directly placed on the foundation of the steam turbine operating platform. With the development of steam turbine technology, to ensure the stability of the shafting of the steam turbine and reduce the vacuum load of the low-pressure outer cylinder on the operating platform of the steam turbine, and to reduce the load on the concrete base of the steam turbine generator, more and more models of low-pressure cylinders adopt the inner cylin...
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IPC IPC(8): F28B9/00F28F9/00F28F9/007
CPCF28B9/00F28F9/001F28F9/007
Inventor 阳欧高扬鲁前奎季丹方邦义黄继朋宫传瑶刘维信陈建房媛李家富李峻
Owner DONGFANG TURBINE CO LTD