Reaction type steam turbine

Abstract

The utility model discloses a reaction type steam turbine which comprises a machine body, the top of an annular shell is fixedly connected with the upper portion of the inner side of a straight cylinder, a bent pipe is communicated with the lower portion of the inner side of the annular shell, one end of the bent pipe is communicated with an oil pump, and the output end of the oil pump is communicated with a branch pipe penetrating through the annular shell. One end of the branch pipe communicates with an annular pipe, the back face of the annular pipe is fixedly connected with the rear portion of the inner side of the straight cylinder, and a plurality of spray heads are installed on one side of the annular pipe. The utility model relates to the technical field of reaction turbines, realizes uniform and automatic addition of lubricating oil through the matching among an annular pipe, an oil pump and a bent pipe, avoids the condition of abrasion caused by lack of lubrication between a main shaft and a bearing, and solves the problems that the rotating position of the main shaft of the existing turbine is inconvenient to maintain, and the service life of the main shaft is prolonged. And after long-time work, the abrasion of the connecting position is easily accelerated, and the subsequent maintenance cost is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction steam turbines, in particular to a reaction steam turbine. Background Art

[0002] A reaction steam turbine refers to a steam turbine in which steam expands not only in the nozzle but also in the moving blades. The moving blades of a reaction steam turbine are subjected not only to the force generated by the impact of the steam flow, but also to the force generated by the accelerated expansion of steam in the moving blades.

[0003] The moving blades of the axial flow multi-stage reaction steam turbine are directly mounted on the wheel drum, and the stationary blades are installed before each row of blades. The cross-sectional shapes of the moving blades and the stationary blades are basically the same. After the new steam with a pressure of p0 enters the turbine from the annular steam chamber, it expands in the first-stage stationary blade grid, the pressure decreases, and the speed increases. Then it enters the first-stage moving blade grid, changes the flow direction, and generates impulse force. In the moving blade grid, the steam continues to expand, the pressure decreases, and the flow rate increases.

[0004] However, it is not convenient to maintain the rotation position of the main shaft of the existing steam turbine, and the connection position is easily worn out after long-term operation, thereby increasing the subsequent maintenance costs. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a reaction steam turbine, which solves the problem that the existing turbine is inconvenient to maintain the rotation position of the main shaft, and the connection position is easily worn out after long-term operation, thereby increasing the subsequent maintenance costs.

[0006] To achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a reaction steam turbine, including a body, one end of the body is fixedly connected to a cover body by bolts, a straight cylinder is fixedly connected to a through hole on one side of the cover body, the inner side of the straight cylinder is rotatably connected to a main shaft through a bearing, the outer side of the main shaft is equipped with stationary blades and moving blades, the interior of the straight cylinder is provided with an auxiliary mechanism, the auxiliary mechanism includes an annular shell, an annular pipe, an oil pump, a bent pipe and a branch pipe, the top of the annular shell is fixedly connected to the upper inner side of the straight cylinder, the lower inner side of the annular shell is connected to a bent pipe, one end of the bent pipe is connected to the oil pump, the output end of the oil pump is connected to a branch pipe penetrating the annular shell, one end of the branch pipe is connected to the annular pipe, the back side of the annular pipe is fixedly connected to the inner rear of the straight cylinder, and one side of the annular pipe is equipped with multiple nozzles.

[0007] Preferably, the plurality of nozzles are equidistantly distributed on one side of the annular tube, the spraying positions of the plurality of nozzles correspond to the bearings, a liquid inlet pipe is connected to the upper side of one side of the annular shell, and the outer wall of the liquid inlet pipe passes through the straight tube.

[0008] Preferably, a curved pipe is fixedly connected to a through hole on one side of the cover body, a temperature probe is installed at the through hole above the curved pipe, and a valve is installed on one side of the curved pipe.

[0009] Preferably, one side of the valve is connected to a box body, two through holes above the box body are fixedly connected to copper tubes, and a circulation pump is installed above one side of the copper tubes.

[0010] Preferably, the bottom of the box body is connected to a liquid outlet pipe, and one side of the box body is connected to a steam outlet pipe.

[0011] Beneficial Effects

[0012] The utility model provides a reaction steam turbine. It has the following beneficial effects: the reaction steam turbine realizes uniform and automatic addition of lubricating oil through the cooperation between the annular pipe, the oil pump and the elbow, avoids the wear between the main shaft and the bearing due to lack of lubrication, solves the problem that the existing steam turbine is not convenient for maintaining the rotation position of the main shaft, and easily accelerates the wear of the connection position after long-term work, thereby increasing the subsequent maintenance cost.

[0013] Through the coordination among the box, copper tube and circulating pump, the pre-cooling of the recovered steam is achieved, thus avoiding the excessively high temperature of the discharged steam affecting the working efficiency of the subsequent condenser, saving the liquefaction time and continuing to participate in the circulation work of the thermal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the appearance of the utility model;

[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the middle annular pipe, oil pump and elbow;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the middle box, copper pipes and circulation pump.

[0018] In the figure: 1, machine body, 2, stationary blades, 3, moving blades, 4, main shaft, 5, straight cylinder, 6, bearings, 7, curved pipe, 8, cover, 9, temperature probe, 10, valve, 11, box body, 12, copper pipe, 13, circulating pump, 14, steam outlet pipe, 15, liquid outlet pipe, 16, annular pipe, 17, annular shell, 18, oil pump, 19, curved pipe, 20, branch pipe, 21, nozzle. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The existing steam turbine is not convenient for maintaining the rotation position of the main shaft, and the connection position is easily worn out after long-term operation, thereby increasing the subsequent maintenance costs.

[0021] In view of this, a reaction steam turbine is provided, which realizes uniform and automatic addition of lubricating oil through the cooperation between an annular pipe, an oil pump and a bent pipe, avoids wear between the main shaft and the bearing due to lack of lubrication, and solves the problem that the existing turbine is not convenient for maintenance of the rotation position of the main shaft, and easily accelerates the wear of the connection position after long-term work, thereby increasing the subsequent maintenance cost.

[0022] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0023] Embodiment 1: Figure 1-3 As can be seen, a reaction steam turbine includes a body 1. Other structures inside the body 1 are not shown because they are prior art and are not specifically limited. One end of the body 1 is fixedly connected to a cover 8 by bolts, and a straight cylinder 5 is fixedly connected to a through hole on one side of the cover 8. The inner side of the straight cylinder 5 is rotatably connected to a main shaft 4 through a bearing 6. The outer side of the main shaft 4 is provided with a stationary blade 2 and a moving blade 3. An auxiliary mechanism is provided inside the straight cylinder 5, and the auxiliary mechanism includes an annular shell 17, an annular pipe 16, and an oil pump 18. , an elbow 19 and a branch pipe 20, the top of the annular shell 17 is fixedly connected to the upper inner side of the straight cylinder 5, the inner lower side of the annular shell 17 is connected with an elbow 19, one end of the elbow 19 is connected with an oil pump 18, the model of the oil pump 18 is not limited, the output end of the oil pump 18 is connected with a branch pipe 20 penetrating the annular shell 17, one end of the branch pipe 20 is connected with an annular tube 16, the back of the annular tube 16 is fixedly connected to the inner rear of the straight cylinder 5, and a plurality of nozzles 21 are installed on one side of the annular tube 16;

[0024] In the specific implementation process, it is worth pointing out that the cooperation between the oil pump 18, the elbow 19 and the branch pipe 20 realizes the uniform and automatic addition of lubricating oil, avoids the wear between the main shaft 4 and the bearing 6 due to lack of lubrication, and solves the problem that the existing steam turbine is not convenient for maintaining the rotation position of the main shaft 4, and the wear of the connection position is easily accelerated after long-term operation, thereby increasing the subsequent maintenance cost;

[0025] Furthermore, a plurality of nozzles 21 are equidistantly distributed on one side of the annular tube 16, and the spraying positions of the plurality of nozzles 21 correspond to the bearing 6. A liquid inlet pipe 22 is connected to the upper side of the annular shell 17, and the outer wall of the liquid inlet pipe 22 passes through the straight tube 5;

[0026] In the specific implementation process, it is worth pointing out that the liquid inlet pipe 22 can facilitate the user to add lubricating oil into the annular shell 17, and the spraying positions of the multiple nozzles 21 corresponding to the bearing 6 can ensure that the lubricating oil is sprayed evenly;

[0027] Specifically, when using the reaction steam turbine, the user can start the oil pump 18 through an external controller when lubricating oil needs to be added. After starting, the oil pump 18 can suck the lubricating oil in the annular shell 17 and inject it into the annular tube 16 through the branch pipe 20, and then the multiple nozzles 21 on one side of the annular tube 16 can spray it on the bearing 6 for lubrication and maintenance.

[0028] Embodiment 2: By Figure 1 , 2 As can be seen from Figure 4, a curved pipe 7 is fixedly connected to a through hole on one side of the cover body 8, a temperature probe 9 is installed on the through hole above the curved pipe 7, and the model of the temperature probe 9 is not limited. A valve 10 is installed on one side of the curved pipe 7, and the valve 10 is a ball valve that can control the speed of steam discharge;

[0029] In the specific implementation process, it is worth pointing out that the temperature probe 9 can monitor the temperature of the steam inside the curved pipe 7;

[0030] Furthermore, one side of the valve 10 is connected to a box body 11, two through holes above the box body 11 are fixedly connected to copper tubes 12, and a circulation pump 13 is installed above one side of the copper tube 12, and the model of the circulation pump 13 is not limited;

[0031] In the specific implementation process, it is worth pointing out that the copper tube 12 is designed in an annular shape, and the copper tube 12 is connected to an external water tank. The circulating pump 13 can suck water from the external water tank and discharge it after circulation through the copper tube 12. The water in the copper tube 12 exchanges heat with the steam passing through. Usually, for a condensing unit, the exhaust steam discharged from the turbine is recovered through a condenser, and the exhaust steam is converted into water in the condenser to continue to participate in the circulation of the thermal system to do work;

[0032] Furthermore, the bottom of the box body 11 is connected to a liquid outlet pipe 15, and one side of the box body 11 is connected to a steam outlet pipe 14;

[0033] In the specific implementation process, it is worth pointing out that the liquid outlet pipe 15 can facilitate the user to discharge the residual water inside the box body 11;

[0034] Specifically, on the basis of the above-mentioned embodiment 1, through the cooperation between the box body 11, the copper tube 12 and the circulating pump 13, pre-cooling of the recovered steam is achieved, so as to avoid the exhaust steam temperature being too high to affect the working efficiency of the subsequent condenser, save liquefaction time, and continue to participate in the circulation work of the thermal system.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reaction steam turbine, comprising a body (1), characterized in that: One end of the machine body (1) is fixedly connected to a cover body (8) by bolts, a straight cylinder (5) is fixedly connected to a through hole on one side of the cover body (8), the inner side of the straight cylinder (5) is rotatably connected to a main shaft (4) via a bearing (6), the outer side of the main shaft (4) is provided with stationary blades (2) and moving blades (3), and an auxiliary mechanism is provided inside the straight cylinder (5); The auxiliary mechanism comprises an annular shell (17), an annular pipe (16), an oil pump (18), a bent pipe (19) and a branch pipe (20); The top of the annular shell (17) is fixedly connected to the upper inner side of the straight cylinder (5); the lower inner side of the annular shell (17) is connected to a curved pipe (19); one end of the curved pipe (19) is connected to an oil pump (18); the output end of the oil pump (18) is connected to a branch pipe (20) penetrating the annular shell (17); one end of the branch pipe (20) is connected to an annular tube (16); the back side of the annular tube (16) is fixedly connected to the inner rear side of the straight cylinder (5); and a plurality of nozzles (21) are installed on one side of the annular tube (16).

2. A reaction steam turbine according to claim 1, characterized in that: The plurality of nozzles (21) are equidistantly distributed on one side of the annular tube (16), and the spraying positions of the plurality of nozzles (21) correspond to the bearing (6). A liquid inlet pipe (22) is connected to the upper side of one side of the annular shell (17), and the outer wall of the liquid inlet pipe (22) passes through the straight cylinder (5).

3. A reaction steam turbine according to claim 1, characterized in that: A curved pipe (7) is fixedly connected to a through hole on one side of the cover body (8), a temperature probe (9) is installed on the through hole above the curved pipe (7), and a valve (10) is installed on one side of the curved pipe (7).

4. A reaction steam turbine according to claim 3, characterized in that: One side of the valve (10) is connected to a box body (11), two through holes above the box body (11) are fixedly connected to copper tubes (12), and a circulation pump (13) is installed above one side of the copper tube (12).

5. A reaction steam turbine according to claim 4, characterized in that: The bottom of the box body (11) is connected to a liquid outlet pipe (15), and one side of the box body (11) is connected to a steam outlet pipe (14).

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