Steam turbine unit

Abstract

The embodiment of the utility model discloses a steam turbine set. The steam turbine set comprises a steam turbine, a transmission assembly and an oil shield assembly. The oil shield assembly comprises an outer shield, an inner shield, an air injection hole and a compressed air outlet. On the basis, in the working process of the turboset, the turboset can conduct transmission through the transmission assembly, torque adjustment can be achieved, through arrangement of the oil baffle assembly, gas can be injected through the gas injection hole, and the gas is discharged through the compressed gas outlet; oil at the steam turbine and oil at the transmission assembly can be prevented from entering the oil shield through gas exhausted from the compressed gas outlet, oil leakage of the steam turbine and the transmission assembly can be avoided, and the operation safety of the steam turbine set is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of steam turbines, and in particular, to a steam turbine unit. Background Art

[0002] Steam turbine units are mainly used to convert the thermal energy of steam into mechanical energy, and then drive generators or other mechanical equipment to work. In current technologies, steam turbine units are developing towards large-scale. The sealing methods of steam turbine units in traditional technologies cannot meet the requirements. Taking a certain steam turbine unit as an example for evaluation, this steam turbine unit includes once-through reheat, three cylinders with two exhausts, single shaft, nine-stage regenerative, direct air-cooled condensing steam turbine, and the steam turbine model is NZK660-28 / 600 / 620. The total length of the shafting of the steam turbine unit is 26054.7 mm, among which the high-pressure rotor has 14 stages, a length of 7968.7 mm, and a weight of 19.07 t; the intermediate-pressure rotor has 10 stages, a length of 7548 mm, and a weight of 31.3 t; the low-pressure rotor has 2×5 stages, a length of 10538 mm, and a weight of 85.2 t. The steam turbine rotates counterclockwise (viewed from the steam turbine towards the generator). The feed water pump adopts the coaxial drive technology of the steam turbine, and the transmission component adopts the structural model RW 15-11.5F 10A. The distance from the end face of the input shaft to the end face of the output shaft of the transmission component is 6690 mm, and the drive end adopts a toothed coupling with a length of 1005 mm. Both the input shaft and the output shaft rotate counterclockwise (viewed from the steam turbine towards the generator). Components such as the hydraulic coupling, switching coupling, hydraulic torque converter, and planetary gear transmission device of the transmission component are installed together in a multi-piece housing. Each internal component is coaxially arranged on the main shafting and the parallel auxiliary shafting. The oil tank is arranged below the housing, and a mechanical drive working oil pump, a mechanical drive lubricating oil pump, and an electric auxiliary lubricating oil pump are provided. A completely new feed water system that adjusts the torque through the transmission component to achieve the purpose of power adjustment replaces the drive methods of traditional motors (abbreviation: electric pump) and small steam turbines (abbreviation: steam pump). However, during the operation of this large-scale steam turbine unit, oil leakage is likely to occur, which in turn affects the safe use of the steam turbine unit. Summary of the Utility Model

[0003] The present utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, according to the embodiments of the present application, a steam turbine unit is proposed, including:

[0005] A steam turbine and a transmission component, the steam turbine is connected to the transmission component;

[0006] An oil baffle component, the oil baffle component is arranged between the steam turbine and the transmission component;

[0007] Among them, the oil baffle assembly includes an outer baffle, an inner baffle, an air injection hole, and a compressed air outlet. The outer baffle faces the steam turbine, the inner baffle faces the transmission assembly, the compressed air outlet faces the steam turbine and the transmission assembly, and the air injection hole is communicated with the compressed air outlet.

[0008] In a feasible implementation manner, the steam turbine unit further includes: a first oil supply assembly for outputting turbine oil to the steam turbine.

[0009] A second oil supply assembly for supplying anti-wear hydraulic oil to the transmission assembly.

[0010] Among them, the compressed air output through the oil baffle assembly is used to block the contact between the turbine oil and the anti-wear hydraulic oil.

[0011] In a feasible implementation manner, the steam turbine unit further includes: a compressed air supply component communicated with the air injection hole.

[0012] In a feasible implementation manner, the oil baffle assembly further includes:

[0013] A fastening part connected to the outer baffle.

[0014] In a feasible implementation manner, the inner baffle and the outer baffle enclose to form an air cavity. The air injection hole is communicated with the air cavity, and the compressed air outlets are located on both sides of the air cavity.

[0015] In a feasible implementation manner, the inner baffle and the outer baffle also enclose to form a buffer cavity. The air injection hole is communicated with the buffer cavity, and the buffer cavity is communicated with the air cavity.

[0016] In a feasible implementation manner, there are multiple passages between the buffer cavity and the air cavity.

[0017] In a feasible implementation manner, the steam turbine includes a bearing housing, the transmission assembly includes a coupling, the bearing housing is connected to the coupling through a rotating shaft, and the oil baffle assembly is arranged on the rotating shaft.

[0018] In a feasible implementation manner, the steam turbine unit further includes:

[0019] A shield covering the coupling.

[0020] In a feasible implementation manner, the steam turbine unit further includes:

[0021] A filter screen arranged at the compressed air outlet.

[0022] Compared with the prior art, the utility model at least includes the following beneficial effects:

[0023] The steam turbine unit provided by the embodiment of the present application includes a steam turbine, a transmission assembly, and an oil baffle assembly. The oil baffle assembly includes an outer baffle, an inner baffle, an air injection hole, and a compressed air outlet. Based on this, during the operation of the steam turbine unit, the steam turbine unit can be transmitted through the transmission assembly to adjust the torque. Through the setting of the oil baffle assembly, gas can be injected through the air injection hole, and the gas is discharged through the compressed air outlet. The gas discharged through the compressed air outlet can block the oil at the steam turbine and the oil at the transmission assembly from entering the oil baffle, which can prevent oil leakage between the steam turbine and the transmission assembly and ensure the safety of the operation of the steam turbine unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0025] Figure 1 is a schematic structural diagram of an oil baffle assembly of a steam turbine unit provided by an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of a steam turbine unit provided by an embodiment of the present application;

[0027] Figure 3 is Figure 2 a partial enlarged schematic view of the oil baffle assembly in

[0028] Among them, Figures 1 to 3 the corresponding relationship between the reference numerals and the component names in

[0029] 130 oil baffle assembly;

[0030] 131 outer baffle, 132 inner baffle, 133 air injection hole, 134 compressed air outlet, 135 clamping piece, 136 air cavity, 137 buffer cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, rather than limitations on the technical solutions of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0032] As Figures 1 to 3As shown in the figure, a steam turbine unit is proposed according to an embodiment of the present application, including: a steam turbine and a transmission assembly, the steam turbine is connected to the transmission assembly; an oil baffle assembly 130, the oil baffle assembly 130 is arranged between the steam turbine and the transmission assembly; wherein, the oil baffle assembly 130 includes an outer baffle 131, an inner baffle 132, an air injection hole 133 and a compressed air outlet 134, the outer baffle 131 is arranged facing the steam turbine, the inner baffle 132 is arranged facing the transmission assembly, the compressed air outlet 134 is facing the steam turbine and the transmission assembly, and the air injection hole 133 is communicated to the compressed air outlet 134.

[0033] The steam turbine unit provided by the embodiment of the present application includes a steam turbine, a transmission assembly and an oil baffle assembly 130, and the oil baffle assembly 130 includes an outer baffle 131, an inner baffle 132, an air injection hole 133 and a compressed air outlet 134. Based on this, during the operation of the steam turbine unit, the steam turbine unit can be transmitted through the transmission assembly to achieve torque adjustment. Through the setting of the oil baffle assembly 130, gas can be injected through the air injection hole 133, and the gas is discharged through the compressed air outlet 134. The gas discharged through the compressed air outlet 134 can block the oil at the steam turbine and the oil at the transmission assembly from entering the oil baffle, which can prevent oil leakage between the steam turbine and the transmission assembly and ensure the safety of the operation of the steam turbine unit.

[0034] It can be understood that since the steam turbine unit provided by the embodiment of the present application can effectively prevent oil leakage, it can reduce the oil consumption of the steam turbine and the transmission assembly, improve the operation safety of the steam turbine unit, and reduce the operation cost at the same time.

[0035] In a feasible implementation manner, the steam turbine unit further includes: a first oil supply assembly for outputting turbine oil to the steam turbine; a second oil supply assembly for supplying anti-wear hydraulic oil to the transmission assembly; wherein, the compressed air output through the oil baffle assembly 130 is used to block the contact between the turbine oil and the anti-wear hydraulic oil.

[0036] In this technical solution, the steam turbine unit can include a first oil supply assembly and a second oil supply assembly. The first oil supply assembly is used to output turbine oil to the steam turbine, and the second oil supply assembly is used to supply anti-wear hydraulic oil to the transmission assembly. That is to say, the types of oil supplied to the steam turbine and the transmission assembly are different. Based on this, the compressed air of the oil baffle assembly 130 blocks the contact between the turbine oil and the anti-wear hydraulic oil, which can effectively prevent oil leakage, reduce the vibration generated during equipment operation, and make the operation of the steam turbine unit safer.

[0037] In a feasible implementation manner, the steam turbine unit further includes: a compressed air supply member, and the compressed air supply member is communicated with the air injection hole 133.

[0038] In this technical solution, the steam turbine unit may further include a compressed air supply component. By providing the compressed air supply component, compressed air can be injected into the air injection hole 133, and the compressed air is then output via the compressed air outlet 134 to complete the blocking of the steam turbine oil and the anti-wear hydraulic oil, which can improve the blocking effect.

[0039] It can be understood that the blocking effect can be adjusted by controlling the output pressure of the compressed air supply component, making the use of the steam turbine unit more intelligent.

[0040] As Figures 1 to 3 shown, in a feasible implementation manner, the oil baffle assembly 130 further includes: a fastening member 135, and the fastening member 135 is connected to the outer baffle 131.

[0041] In this technical solution, the oil baffle assembly 130 may further include a fastening member 135, and the fastening member 135 is connected to the outer baffle 131. The oil baffle assembly 130 can be fixed on the end face of other components through the fastening member 135, which is convenient for the assembly of the oil baffle assembly 130.

[0042] As Figures 1 to 3 shown, in a feasible implementation manner, the inner baffle 132 and the outer baffle 131 enclose to form an air cavity 136, the air injection hole 133 is communicated with the air cavity 136, and the compressed air outlets 134 are located on both sides of the air cavity 136.

[0043] In this technical solution, only the layout method of the compressed air outlet 134 is provided. The inner baffle 132 and the outer baffle 131 enclose to form an air cavity 136, the air injection hole 133 is communicated with the air cavity 136, and the compressed air outlets 134 are located on both sides of the air cavity 136. Such a setting can make the pressure of the compressed air output from the compressed air outlets 134 more balanced, making the sealing effect more stable.

[0044] As Figures 1 to 3 shown, in a feasible implementation manner, the inner baffle 132 and the outer baffle 131 also enclose to form a buffer cavity 137, the air injection hole 133 is communicated with the buffer cavity 137, and the buffer cavity 137 is communicated with the air cavity 136.

[0045] In this technical solution, an oil buffer cavity 137 can also be formed between the inner baffle 132 and the outer baffle 131, and the buffer cavity 137 is then communicated with the air cavity 136. Based on this, the compressed air can be first supplied into the buffer cavity 137 for pressure stabilization, and then output to the air cavity 136, which can make the gas pressure output from the air cavity 136 via the compressed air outlet 134 more stable and improve the sealing effect.

[0046] In a feasible implementation manner, there are multiple passages between the buffer cavity 137 and the air cavity 136.

[0047] In this technical solution, there are multiple passageways between the buffer chamber 137 and the air chamber 136. Based on this, compressed air can enter the air chamber 136 orderly, the gas pressure output by the air chamber 136 via the compressed air outlet 134 can be made more stable, and the sealing effect can be improved.

[0048] In some examples, the number of passageways between the buffer chamber 137 and the air chamber 136 is 10 or more.

[0049] In a feasible implementation manner, the steam turbine includes a bearing housing, the transmission assembly includes a coupling, the bearing housing is connected to the coupling through a rotating shaft, and the oil baffle assembly 130 is arranged on the rotating shaft. Such an arrangement facilitates the adjustment of the torque of the steam turbine, and thus the power, and at the same time facilitates the assembly of the oil baffle assembly 130.

[0050] In a feasible implementation manner, the steam turbine unit further includes: a shield, and the shield covers the coupling. Such an arrangement can protect the coupling.

[0051] In a feasible implementation manner, the steam turbine unit further includes: a filter screen, and the filter screen is arranged at the compressed air outlet 134. Such an arrangement can reduce the probability of impurities or sundries entering the steam turbine and the transmission assembly, and ensure the reliability of the equipment operation.

[0052] In the present utility model, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected to", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present utility model.

[0054] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steam turbine unit, characterized in that: include: a steam turbine and a transmission assembly, wherein the steam turbine is connected to the transmission assembly; An oil baffle assembly, the oil baffle assembly being arranged between the steam turbine and the transmission assembly; Wherein, the oil baffle assembly includes an outer baffle, an inner baffle, an air injection hole and a compressed gas outlet, the outer baffle is arranged toward the steam turbine, the inner baffle is arranged toward the transmission assembly, the compressed gas outlet is toward the steam turbine and the transmission assembly, and the air injection hole is connected to the compressed gas outlet.

2. The steam turbine unit according to claim 1, characterized in that: Also includes: a first oil supply assembly, the first oil supply assembly being used to output turbine oil to the steam turbine; a second oil supply assembly, the second oil supply assembly being used to supply anti-wear hydraulic oil to the transmission assembly; The compressed air outputted through the oil baffle assembly is used to block the contact between the turbine oil and the anti-wear hydraulic oil.

3. The steam turbine unit according to claim 1, characterized in that: Also includes: A compressed air supply component is connected to the air injection hole.

4. The steam turbine unit according to claim 1, characterized in that: The oil baffle assembly also includes: A handle assembly is connected to the outer stop.

5. The steam turbine unit according to claim 1, characterized in that: The inner block and the outer block enclose an air cavity, the air injection hole leads to the air cavity, and the compressed air outlet is located at two sides of the air cavity.

6. The steam turbine unit according to claim 5, characterized in that: The inner block and the outer block further enclose a buffer cavity, the air injection hole is connected to the buffer cavity, and the buffer cavity is connected to the air cavity.

7. The steam turbine unit according to claim 6, characterized in that: There are multiple passages between the buffer cavity and the air cavity.

8. The steam turbine unit according to any one of claims 1 to 7, characterized in that: The steam turbine comprises a bearing box, the transmission assembly comprises a coupling, the bearing box and the coupling are connected via a rotating shaft, and the oil baffle assembly is arranged on the rotating shaft.

9. The steam turbine unit according to claim 8, characterized in that: Also includes: A shield is arranged on the coupling.

10. The steam turbine unit according to any one of claims 1 to 7, characterized in that: Also includes: A filter screen is arranged at the compressed gas outlet.

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