Condensate pump and power station condensate system

Abstract

The invention relates to a condensate pump and a power station condensate system, the condensate pump comprises: a housing, one end of which is provided with a mounting port; the end cover is arranged at the mounting opening; the rotating part is installed in the shell, and the two ends of the rotating part extend out of the shell respectively; the supporting assemblies are detachably arranged at the two ends of the rotating part, one end of the rotating part is rotationally connected with the end cover through the supporting assemblies, and the other end of the rotating part is rotationally connected with the shell through the supporting assemblies. Only one end of the shell is provided with the mounting opening, the end cover is arranged at the mounting opening, during mounting, the rotating part is mounted in the shell through the mounting opening, the two ends of the rotating part are supported by the shell and the end cover through the detachable supporting assemblies, and the middle part of the rotating part is in clearance fit with the shell; in this way, the rotating part can be pulled out only by opening the end cover and detaching the supporting assembly away from the end of the mounting opening during dismounting, mounting and dismounting are convenient, and the maintenance time is shortened.

Description

Technical Field

[0001] The present disclosure relates to a condensate pump, and in particular, to a condensate pump and a condensate system of a power station. Background Art

[0002] In the related art, both ends of the condensate pump are provided with end covers. When installing, the end covers on both sides need to be opened for installation and then fixed. This makes disassembly more complicated and time-consuming. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a condensate pump and a condensate system for a power station, which can solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a condensate pump, comprising: a shell, one end of which is provided with a mounting port; an end cover, arranged at the mounting port; a rotating part, installed into the shell along the extension direction of the shell through the mounting port, and the two ends of the rotating part respectively extend out of the shell; and a support assembly, detachably arranged at both ends of the rotating part, one end of the rotating part close to the mounting port is rotatably connected to the end cover through the support assembly, and the other end is rotatably connected to the shell through the support assembly, and the middle part of the rotating part is gap-fitted with the shell.

[0005] Optionally, the support assembly includes a bearing and a thrust bearing, and the bearing is installed at one end of the rotating part, and the thrust bearing is installed at the other end.

[0006] Optionally, the end of the rotating part facing away from the mounting port is constructed as a driving end, the bearing shell is arranged on the driving end, the thrust bearing is arranged at the other end, the end cover includes a cover body and a bearing box arranged on the side of the cover body facing away from the shell, and the thrust bearing is arranged in the bearing box.

[0007] Optionally, the rotating part includes a shaft, a first impeller and a second impeller, the first impeller and the second impeller are arranged on the shaft at intervals and move synchronously with the shaft, the first impeller and the second impeller are located in the shell, and both ends of the shaft extend out of the shell.

[0008] Optionally, the first impeller is arranged at an end of the shaft body away from the mounting opening, and the first impeller is configured as a double-suction impeller.

[0009] Optionally, the second impeller is arranged at one end of the shaft body close to the installation opening, and the second impeller is constructed as a conical impeller with an outer diameter gradually decreasing along the installation direction of the rotating part.

[0010] Optionally, the condensate pump further includes a flow guide cover, which is arranged between the first impeller and the second impeller. The flow guide cover is connected to the casing through a positioning device and can be pulled out of the casing synchronously with the rotating part.

[0011] Optionally, the positioning device is constructed as a positioning pin, a limiting boss is provided in the shell, a pin hole is provided on the limiting boss, the end of the air deflector facing away from the mounting port is in contact with the limiting boss, and the positioning pin passes through the air deflector along the mounting direction of the rotating part and extends into the pin hole.

[0012] Another object of the present disclosure is to provide a condensate system for a power station, comprising: a condenser; and the above-mentioned condensate pump, wherein the condensate pump is arranged below the condenser.

[0013] Optionally, the condenser is arranged at a high position, and the condensate pump is constructed as a horizontal condensate pump, and the horizontal condensate pump is arranged on the ground.

[0014] Through the above technical solution, the shell is provided with a mounting port only at one end, and an end cover is provided at the mounting port. During installation, the rotating part is installed into the shell through the mounting port, and the two ends of the rotating part are supported by the shell and the end cover through detachable support components, and the middle part is gap-matched with the shell. In this way, when disassembling, it is only necessary to open the end cover and remove the support component at the end away from the mounting port to pull out the rotating part, which is convenient for installation and disassembly and shortens the maintenance time.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a cross-sectional view of a condensate pump in the present disclosure; Figure 2 1 is a side view of a housing in the present disclosure.

[0017] Description of Reference Numerals 1. Housing; 11. Limiting boss; 2. Rotating part; 21. Shaft; 22. First impeller; 23. Second impeller; 3. Fairing; 4. End cover; 41. Cover; 42. Bearing box; 5. Support assembly; 51. Bearing shell; 52. Thrust bearing; 6. Pin hole. DETAILED DESCRIPTION

[0018] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0019] In this disclosure, unless otherwise indicated, directional terms such as "upper," "lower," "top," and "bottom" generally refer to the upper, lower, top, and bottom positions of the corresponding component in the direction of gravity when in use. "Inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not convey order or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0020] like Figure 1-2 As shown, the present disclosure provides a condensate pump, comprising: a shell 1, one end of which is provided with a mounting port; an end cover 4, which is arranged at the mounting port; a rotating part 2, which is installed into the shell 1 along the extension direction of the shell 1 through the mounting port, and the two ends of the rotating part 2 respectively extend out of the shell 1; and a support assembly 5, which is detachably arranged at the two ends of the rotating part 2, one end of the rotating part 2 close to the mounting port is rotatably connected to the end cover 4 through the support assembly 5, and the other end is rotatably connected to the shell 1 through the support assembly 5, and the middle part of the rotating part 2 is clearance-fitted with the shell 1.

[0021] Through the above technical solution, the shell 1 is provided with a mounting port only at one end, and an end cover 4 is provided at the mounting port. During installation, the rotating part 2 is installed into the shell 1 through the mounting port. The two ends of the rotating part 2 are supported by the shell 1 and the end cover 4 through the detachable support assembly 5, and the middle part is gap-fitted with the shell 1. In this way, when disassembling, it is only necessary to open the end cover 4 and remove the support assembly 5 at the end away from the mounting port to pull out the rotating part 2. The installation and disassembly are convenient, and the maintenance time is shortened.

[0022] As an optional implementation, Figure 1 As shown, the support assembly 5 includes a bearing 51 and a thrust bearing 52. The bearing 51 is installed at one end of the rotating part 2, and the thrust bearing 52 is installed at the other end. The bearing 51 and the thrust bearing 52 play the role of support and rotation connection. The thrust bearing 52 is used to withstand the radial force of the rotating part 2, and acts as a thrust bearing and a limiter.

[0023] Optionally, the end of the rotating part 2 facing away from the mounting port is constructed as a driving end, the bearing shell 51 is arranged on the driving end, and the thrust bearing 52 is arranged at the other end. The end cover 4 includes a cover body 41 and a bearing box 42 arranged on the side of the cover body 41 facing away from the shell 1. The bearing box 42 and the cover body 41 are detachable, and the thrust bearing 52 is arranged in the bearing box 42. On the one hand, because the driving end needs to be connected to the driving device, the bearing box 42 is arranged on the free end. On the other hand, when the rotating part 2 is disassembled, the bearing box 42 and the end cover 4 can be pulled out synchronously without disassembly.

[0024] As an optional implementation, Figure 1 As shown, the rotating part 2 includes a shaft 21, a first impeller 22 and a second impeller 23. The first impeller 22 and the second impeller 23 are arranged at intervals on the shaft 21 and move synchronously with the shaft 21. The first impeller 22 and the second impeller 23 are located in the shell 1, and both ends of the shaft 21 extend out of the shell 1. A double impeller design is adopted, so that the condensate pump can provide a larger flow output. The rotation of the shaft 21 simultaneously drives the first impeller 22 and the second impeller 23 to rotate.

[0025] Optionally, the first impeller 22 is arranged at the end of the shaft 21 away from the installation port, and the first impeller 22 is constructed as a double-suction impeller, that is, the double-suction impeller is arranged on one side of the driving end. The double-suction impeller can effectively reduce the cavitation margin of the pump. The design of the double-suction impeller allows liquid to enter from both sides of the impeller at the same time, rather than the unilateral suction of the single-suction impeller. This structure divides the total flow into two parts, and the flow at the inlet on each side is only half of the total flow. The halving of the flow means that the flow rate at each inlet is significantly reduced. The double-suction impeller directly reduces the pressure loss at the impeller inlet by reducing the inlet flow rate, thereby reducing the cavitation margin. In addition, the double-suction structure balances the forces on both sides of the impeller, reduces the formation of local low-pressure areas, and further suppresses cavitation.

[0026] Optionally, the second impeller 23 is arranged at one end of the shaft 21 near the installation port. The second impeller 23 is constructed as a conical impeller with an outer diameter gradually decreasing along the installation direction of the rotating part 2. The conical impeller is arranged near the installation port, and the conical structure is convenient for maintenance and disassembly.

[0027] Optionally, the condensate pump also includes a deflector 3, which is arranged between the first impeller 22 and the second impeller 23. The deflector 3 is connected to the shell 1 through a positioning device and can be pulled out of the shell 1 synchronously with the rotating part 2. The deflector 3 optimizes the water flow path, reduces turbulence and energy loss, and thus improves the head and efficiency of the water pump. The deflector 3 is connected to the shell 1 and does not contact the rotating part 2, and will not hinder the rotation of the rotating part 2. The deflector 3 can be pulled out synchronously with the rotating part 2 and will not hinder the disassembly of the rotating part 2.

[0028] Among them, Figure 2As shown, the positioning device is constructed as a positioning pin, a limiting boss 11 is provided in the shell 1, and a pin hole 6 is provided on the limiting boss 11. The end of the air deflector 3 away from the installation port contacts the limiting boss 11, and the positioning pin passes through the air deflector 3 along the installation direction of the rotating part 2 and extends into the pin hole 6. The air deflector 3 is limited by the limiting boss 11 and positioned by the positioning pin. The positioning pin only plays a positioning role and is not fixedly connected to the pin hole 6. In this way, when the rotating part 2 is pulled out, the positioning pin can be pulled out synchronously and the air deflector 3 can be pulled out together. If the air deflector 3 is to be fixed more tightly, a fastening device such as a fastening bolt can be provided. The fastening bolt passes through the shell 1 from the outside of the shell 1 and abuts or is threadedly connected to the air deflector 3. In this way, when the rotating part 2 is pulled out, the fastening bolt is first taken out from the outside, and then the air deflector 3 and the rotating part 2 are pulled out together.

[0029] During actual installation, stand the shell 1 on the ground with the installation port facing upward, open the end cover 4, first install the first impeller 22 on the shaft 21, and then put the shaft 21 into the shell 1 through the installation port by hoisting, and then install the deflector 3, the second impeller 23 and the cover 41 in sequence, and finally install the bearing 51, the thrust bearing 52 and the bearing box 42. To facilitate the installation of the bearing 51, the thrust bearing 52 and the bearing box 42, the shell 1 can be laid flat before installation, or the thrust bearing 52 and the bearing box 42 can be installed first and then the shell 1 can be laid flat, and then the bearing 51 can be installed.

[0030] Another object of the present disclosure is to provide a condensate system for a power plant, comprising: a condenser; and the aforementioned condensate pump. The condensate pump is positioned below the condenser because, when the condensate pump is operating, if the inlet pressure is lower than the saturation pressure of the water, the water will vaporize and form bubbles (cavitation), causing damage to the pump impeller, increased vibration, and reduced efficiency. The interior of the condenser is a vacuum environment (pressure approximately 0.005-0.01 MPa). If the pump is installed too high, the inlet static pressure will be insufficient, which can easily cause cavitation. The bottom of the condenser is in a negative pressure state. If the pump is located above, water must be drawn to the pump inlet, but effective suction is difficult to achieve under vacuum conditions. When arranged below, the condensate can flow naturally into the pump inlet by gravity, without the need to overcome additional vacuum resistance.

[0031] Optionally, the condenser is arranged at a high position, and the condensate pump is constructed as a horizontal condensate pump. The horizontal condensate pump is arranged on the ground. In the related art, the condensate pump is conventionally arranged in a deep well foundation pit of minus 10 meters above the steam turbine room, and a vertical long-axis pump is used. Due to the deformation of the deep well foundation and the length of the vertical pump shaft, the vertical condensate pump of the power plant vibrates greatly, the equipment fails frequently, and the equipment reliability and safety are low. The present invention utilizes the condition that the steam turbine generator set is arranged at a high position in the plant building to make the condenser position high, with a height of 13m-15m, so that the condensate pump of the power plant adopts a horizontal structure at 0 meters above the steam turbine room, which can not only save the conventional arrangement of the power plant in a deep well foundation pit of minus 10 meters and the vertical long-axis condensate pump, but also avoid the structural problem of the vertical long-axis condensate pump with large vibration. The structure is simple, easy to install, and saves investment. At the same time, the equipment has low vibration, higher reliability and safety.

[0032] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0033] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0034] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A condensate pump, characterized in that: include: A housing, one end of which is provided with a mounting opening; an end cover, arranged at the installation opening; a rotating portion, installed into the housing along an extension direction of the housing through the installation opening, with both ends of the rotating portion extending out of the housing; as well as The support assembly is detachably arranged at both ends of the rotating part, one end of the rotating part close to the mounting port is rotatably connected to the end cover through the support assembly, and the other end is rotatably connected to the shell through the support assembly, and the middle part of the rotating part is gap-fitted with the shell.

2. The condensate pump according to claim 1, characterized in that: The support assembly includes a bearing shell and a thrust bearing. The bearing shell is installed at one end of the rotating part, and the thrust bearing is installed at the other end.

3. The condensate pump according to claim 2, characterized in that: The end of the rotating part facing away from the mounting port is constructed as a driving end, the bearing shell is arranged on the driving end, and the thrust bearing is arranged at the other end. The end cover includes a cover body and a bearing box arranged on the side of the cover body facing away from the shell, and the thrust bearing is arranged in the bearing box.

4. The condensate pump according to claim 1, characterized in that: The rotating part includes a shaft, a first impeller and a second impeller. The first impeller and the second impeller are arranged on the shaft at intervals and move synchronously with the shaft. The first impeller and the second impeller are located in the shell, and both ends of the shaft extend out of the shell.

5. The condensate pump according to claim 4, characterized in that: The first impeller is arranged at one end of the shaft body away from the installation opening, and the first impeller is configured as a double-suction impeller.

6. The condensate pump according to claim 4, characterized in that: The second impeller is arranged at one end of the shaft body close to the installation opening, and the second impeller is constructed as a conical impeller with an outer diameter gradually decreasing along the installation direction of the rotating part.

7. The condensate pump according to claim 4, characterized in that: The condensate pump further includes a flow guide cover, which is arranged between the first impeller and the second impeller. The flow guide cover is connected to the housing through a positioning device and can be synchronously pulled out of the housing along with the rotating part.

8. The condensate pump according to claim 7, characterized in that: The positioning device is constructed as a positioning pin, a limiting boss is provided in the shell, a pin hole is provided on the limiting boss, the end of the air deflector facing away from the mounting port is in contact with the limiting boss, and the positioning pin passes through the air deflector along the mounting direction of the rotating part and extends into the pin hole.

9. A condensate water system for a power station, characterized in that: include: condenser; as well as The condensate pump according to any one of claims 1 to 8, wherein the condensate pump is arranged below the condenser.

10. The condensate water system of a power station according to claim 9, characterized in that: The condenser is arranged at a high position, and the condensate pump is constructed as a horizontal condensate pump, which is arranged on the ground.

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