Water ring vacuum pump capable of improving efficiency of condensing steam turbine

Abstract

The utility model belongs to the technical field of vacuum pumps, and particularly relates to a water ring vacuum pump capable of improving the efficiency of a condensing steam turbine, which comprises a pump head and a motor, the pump head and the motor are both fixedly arranged on a base, and a power input shaft of the pump head is connected with an output shaft of the motor through a coupler. The power input shaft in the pump head is fixedly connected with a main impeller, and the main impeller in the pump head is electrically driven, so that the air inlet end and the air outlet end respectively carry out air suction and exhaust work; the first belt pulley and the second belt pulley are matched in a transmission mode to drive the acceleration blades in the acceleration chamber to rotate, suction force is generated for entering gas at the gas inlet end, the phenomenon that gas passes slowly due to the fact that the gas is filtered by the filtering assembly is eliminated, and the gas is accelerated and pushed to be exhausted at the gas outlet end. Therefore, the pumping efficiency of the vacuum pump can be improved, the vacuumizing efficiency of the condenser is improved, and the efficiency of the steam turbine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a water ring vacuum pump capable of improving the efficiency of a condensing steam turbine. Background Art

[0002] The steam turbine condenser exhaust system is mainly used to continuously extract the air that leaks into the steam side space of the condenser from the loose parts of the condenser and pipelines, so as to maintain the vacuum of the condenser and good heat transfer, reduce the exhaust pressure, increase the available enthalpy drop, improve the operation safety and efficiency, and thus ensure the economy of the steam turbine. The traditional equipment for condenser vacuum pumping mainly adopts steam jet vacuum pump and water jet vacuum pump, but both of these devices have the disadvantages of low efficiency and high noise, and require continuous consumption of steam or water. As land-based steam turbines develop towards high parameters and large capacity, the economic efficiency of using steam jet vacuum pump or water jet vacuum pump is getting lower and lower. The use of water ring vacuum pump as condenser vacuum pumping equipment can not only improve the vacuuming efficiency, but also reduce energy consumption because the working water of the vacuum pump is used in a closed cycle, making long-term operation more economical. It has been widely used in many power plants.

[0003] When the water ring vacuum pump is extracting gas, since the gas contains dust, the dust is easy to generate dirt inside it, and it needs to be disassembled and cleaned regularly, which is inconvenient to operate.

[0004] The existing Chinese patent with announcement number CN213953903U discloses a water ring vacuum pump, including a pump body, a main impeller is provided inside the pump body, an intake pipe and an exhaust pipe are respectively provided on the top of the pump body, an air filter plate is horizontally inserted inside the intake pipe, an intake acceleration chamber and an exhaust acceleration chamber are respectively provided on the intake pipe and the exhaust pipe, an intake acceleration impeller and an exhaust acceleration impeller are respectively provided inside the intake acceleration chamber and the exhaust acceleration chamber, the wheel shaft of the main impeller passes through the pump body and is provided with a driving wheel, the wheel shafts of the intake acceleration impeller and the exhaust acceleration impeller respectively pass through the side walls of the intake acceleration chamber and the exhaust acceleration chamber and are both provided with driven wheels, and the driving wheel drives the two sets of driven wheels through a synchronous belt; an annular sleeve is provided on the outside of the pump body, a fin group is provided on the inner wall of the annular sleeve, an annular cover is provided on the middle part of the outer periphery of the annular sleeve, and a guide pipe connected to the exhaust pipe is provided on the annular cover.

[0005] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: when the device cleans the air filter plate, it is necessary to stop the device for operation, which affects the continuous operation of the water ring vacuum pump, and when the shaft of the main impeller passes through the pump body, the shaft of the intake acceleration impeller, and the shaft of the exhaust acceleration impeller respectively pass through the intake acceleration cavity for connection, three penetration points need to be set on the surface of the device, which increases the probability of leakage in subsequent use and requires improvement; therefore, in response to the above problems, a water ring vacuum pump that can improve the efficiency of condensing steam turbines is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes a water ring vacuum pump that can improve the efficiency of a condensing steam turbine.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the water ring vacuum pump described in the present invention can improve the efficiency of a condensing steam turbine, including a pump head and a motor, the pump head and the motor are fixedly mounted on a base, and the power input shaft of the pump head is connected to the output shaft of the motor by a coupling, the power input shaft inside the pump head is fixedly connected to a main impeller, and the main impeller inside the pump head is driven electrically so that the air inlet and the air outlet perform suction and exhaust operations respectively, the side wall of the pump head is fixedly connected to a bracket, and the bracket is fixedly connected to the base, the top of the pump head is symmetrically fixedly connected to the air inlet and the air outlet, the air inlet and the air outlet are respectively fixedly connected to an acceleration chamber, an acceleration assembly is installed on the acceleration chamber, and the acceleration assembly includes two connecting shafts and two pulleys, the two connecting shafts are divided into The two accelerators are rotatably connected to each other, and one end of the connecting shaft is fixedly connected to an annularly distributed accelerator blade, and the other end of the connecting shaft is fixedly connected to a pulley 1, and the pulley 2 is fixedly installed on the output shaft of the motor. The pulley 1 and the pulley 2 are connected by a belt drive. By connecting the vacuum pump to the turbine condenser as a condenser vacuum extraction device, when the motor drives the main impeller to rotate, the transmission cooperation of the pulley 1 and the pulley 2 respectively drives the acceleration blades inside the acceleration chamber to rotate, and then generates suction to the incoming gas at the air inlet end, eliminating the phenomenon of slow gas passage due to the filtering of the gas by the filter component, and accelerating the gas to be discharged at the air outlet end, thereby improving the extraction efficiency of the vacuum pump, improving the vacuum extraction efficiency of the condenser, and realizing the improvement of the efficiency of the steam turbine.

[0008] Preferably, the upper side wall of the bracket is symmetrically embedded with a bearing, and the connecting shaft passes through the bearing.

[0009] Preferably, a sealing ring is fixedly connected to the intersection of the acceleration chamber and the connecting shaft, and the sealing ring is used to seal the connection between the acceleration chamber and the connecting shaft. Compared with the prior art in which three through-holes are set on the pump body, this device only needs to set two through-holes, thereby effectively reducing the probability of air leakage.

[0010] Preferably, a filter assembly is installed on the air inlet end, and the air inlet end includes an upper connecting end and a lower connecting end. The filter assembly includes a regulating tube, one end of the upper connecting end is fixedly installed at the center of the regulating tube, and valves are respectively installed on both sides of the regulating tube. When the gas enters the filter assembly through the air inlet end, the gas is filtered by the filter element, and the two sets of valves are in opposite working states. The two sets of filter tubes can be alternately controlled to open, so that the gas flows while being filtered by the filter element inside the open filter tube, and by removing the sealing head on the closed filter tube, the filter element inside the filter tube can be taken out for replacement, thereby realizing cleaning and replacement operations without stopping the machine.

[0011] Preferably, both ends of the regulating tube are fixedly connected with filter tubes, and a filter element is installed inside the filter tubes.

[0012] Preferably, a thread groove is tapped inside one end of the filter tube, and a sealing head is threadedly connected to the thread groove.

[0013] Preferably, a one-way tube is fixedly connected to the opposite side of the two filter tubes, a flow tube is fixedly connected to the center of the one-way tube, and the other end of the flow tube is fixedly connected to one end of the lower connecting end. After the gas is filtered through the filter tube, it enters the pump body in sequence through the one-way tube, the flow tube, and the lower connecting end.

[0014] Preferably, one-way valves are fixedly connected to both sides of the one-way tube, and the one-way valves prevent gas from overflowing when the filter tube is opened.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model drives the acceleration blades inside the acceleration chamber to rotate through the transmission cooperation of pulley 1 and pulley 2, thereby generating suction on the incoming gas at the air inlet end, eliminating the phenomenon of slow gas passage due to the filtering of the gas by the filter component, and accelerating the discharge of gas at the air outlet end, thereby improving the vacuum pumping efficiency of the vacuum pump, improving the vacuum pumping efficiency of the condenser, and realizing the improvement of the efficiency of the steam turbine.

[0017] 2. The utility model filters the gas through the filter element, and through the two sets of valves in opposite working states, the two sets of filter tubes can be alternately controlled to open, so that the gas flows while being filtered through the filter element inside the open filter tube, and by removing the sealing head on the closed filter tube, the filter element inside the filter tube can be taken out for replacement, thereby realizing cleaning and replacement operations without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 Side view;

[0021] Figure 3 This is a schematic diagram of the structure of the acceleration component of the utility model;

[0022] Figure 4 For this utility model Figure 2 Schematic diagram of the A structure;

[0023] Figure 5 This is a schematic diagram of the filter tube structure of the utility model.

[0024] In the figure: 1. Pump head; 2. Motor; 3. Base; 4. Bracket; 5. Air inlet; 51. Upper connecting end; 52. Lower connecting end; 6. Air outlet; 7. Acceleration assembly; 71. Coupling; 72. Acceleration blade; 73. Pulley 1; 74. Pulley 2; 8. Filter assembly; 81. Adjusting tube; 83. Valve; 84. Filter tube; 85. Filter element; 86. Sealing head; 87. One-way tube; 88. Circulation tube; 89. One-way valve; 9. Acceleration chamber. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-3As shown, a water ring vacuum pump that can improve the efficiency of a condensing steam turbine includes a pump head 1 and a motor 2. The pump head 1 and the motor 2 are both fixedly mounted on a base 3, and the power input shaft of the pump head 1 is connected to the output shaft of the motor 2 by a coupling. A main impeller is fixedly connected to the power input shaft inside the pump head 1, and the main impeller inside the pump head 1 is driven electrically so that the air inlet end 5 and the air outlet end 6 perform suction and exhaust operations respectively. A bracket 4 is fixedly connected to the side wall of the pump head 1, and the bracket 4 is fixedly connected to the base 3. The top of the pump head 1 is symmetrically fixedly connected to the air inlet end 5 and the air outlet end 6. The air inlet end 5 and the air outlet end 6 are respectively fixedly connected to an acceleration chamber 9. An acceleration component 7 is installed on the acceleration chamber 9. The acceleration component 7 includes two connecting shafts 71 and a pulley 74. The two connecting shafts 71 are rotatably connected to the two acceleration chambers 9 respectively. The connecting shaft 71 One end of the acceleration chamber 9 is fixedly connected to an annularly distributed acceleration blade 72, and the other end of the connecting shaft 71 is fixedly connected to a pulley 1 73, and the pulley 2 74 is fixedly installed on the output shaft of the motor 2. The pulley 1 73 and the pulley 2 74 are connected by belt transmission. By connecting the vacuum pump to the turbine condenser as a condenser vacuum extraction device, when the motor 2 drives the main impeller to rotate, the transmission cooperation of the pulley 1 73 and the pulley 2 74 respectively drives the acceleration blades 72 inside the acceleration chamber 9 to rotate, and then generates suction on the incoming gas at the air inlet end 5, eliminating the phenomenon of slow gas passage due to the filtering of the gas by the filter component 8, and accelerating the gas discharge at the air outlet end 6, thereby improving the vacuum pumping efficiency of the vacuum pump, improving the vacuum extraction efficiency of the condenser, and achieving improved turbine efficiency.

[0028] The upper side wall of the bracket 4 is symmetrically embedded with bearings, and the connecting shaft 71 passes through the bearings.

[0029] A sealing ring is fixedly connected to the intersection of the acceleration chamber 9 and the connecting shaft 71. The sealing ring is used to seal the connection between the acceleration chamber 9 and the connecting shaft 71. Compared with the prior art that has three penetration points on the pump body, this device only needs to have two penetration points, thereby effectively reducing the probability of air leakage.

[0030] Example 2

[0031] For comparison with Example 1, please refer to Figure 4-5As shown, the utility model provides another embodiment, a filter assembly 8 is installed on the air inlet end 5, the air inlet end 5 includes an upper connecting end 51 and a lower connecting end 52, the filter assembly 8 includes a regulating tube 81, one end of the upper connecting end 51 is fixedly installed at the center of the regulating tube 81, and valves 83 are respectively installed on both sides of the regulating tube 81. When the gas enters the filter assembly 8 through the air inlet end 5, the gas is filtered by the filter element 85, and the two sets of valves 83 are in opposite working states, and the two sets of filter tubes 84 can be alternately controlled to open, so that the gas flows while being filtered by the filter element 85 inside the open filter tube 84, and by removing the sealing head 86 on the closed filter tube 84, the filter element 85 inside the filter tube 84 can be taken out for replacement, thereby realizing cleaning and replacement operations without stopping the machine.

[0032] Both ends of the regulating tube 81 are fixedly connected to filter tubes 84 , and a filter element 85 is installed inside the filter tube 84 .

[0033] One end of the filter tube 84 is internally tapped to form a thread groove, and a sealing head 86 is threadedly connected to the thread groove.

[0034] A one-way tube 87 is fixedly connected to the opposite side of the two filter tubes 84, a flow tube 88 is fixedly connected to the center of the one-way tube 87, and the other end of the flow tube 88 is fixedly connected to one end of the lower connecting end 52. After the gas is filtered by the filter tube 84, it enters the pump body in sequence through the one-way tube 87, the flow tube 88, and the lower connecting end 52.

[0035] One-way valves 89 are fixedly connected to both sides of the one-way tube 87 to prevent gas from overflowing when the filter tube 84 is opened.

[0036] Working principle: by connecting the vacuum pump with the turbine condenser as the condenser vacuum exhaust equipment, the main impeller inside the pump head 1 is driven electrically to make the air inlet end 5 and the air outlet end 6 perform suction and exhaust work respectively. When the motor 2 drives the main impeller to rotate, the acceleration blades 72 inside the acceleration chamber 9 are driven to rotate through the transmission cooperation of pulley 1 73 and pulley 2 74, thereby generating suction on the incoming gas at the air inlet end 5, eliminating the phenomenon of slow gas passage caused by the filtering of the gas by the filter component 8, and accelerating the gas discharge at the air outlet end 6, thereby improving the exhaust efficiency of the vacuum pump, improving the vacuum extraction efficiency of the condenser, and realizing the improvement of the efficiency of the steam turbine.

[0037] When the gas enters the filter assembly 8 through the air inlet end 5, the gas is filtered by the filter element 85, and by the two sets of valves 83 being in opposite working states, the two sets of filter tubes 84 can be alternately controlled to open, so that the gas flows while being filtered by the filter element 85 inside the open filter tube 84. By removing the sealing head 86 on the closed filter tube 84, the filter element 85 inside the filter tube 84 can be taken out for replacement, thereby realizing cleaning and replacement operations without stopping the machine.

[0038] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A water ring vacuum pump capable of improving the efficiency of a condensing steam turbine, comprising a pump head (1) and a motor (2), wherein the pump head (1) and the motor (2) are fixedly mounted on a base (3), and a power input shaft of the pump head (1) and an output shaft of the motor (2) are connected via a coupling, characterized in that: The side wall of the pump head (1) is fixedly connected with a bracket (4), and the bracket (4) is fixedly connected to the base (3). The top of the pump head (1) is symmetrically fixedly connected with an air inlet end (5) and an air outlet end (6). The air inlet end (5) and the air outlet end (6) are respectively fixedly connected with an acceleration chamber (9). An acceleration component (7) is installed on the acceleration chamber (9). The acceleration component (7) includes two connecting shafts (71) and a second pulley (74). The two connecting shafts (71) are respectively rotatably connected to the two acceleration chambers (9). One end of the connecting shaft (71) located inside the acceleration chamber (9) is fixedly connected with an annularly distributed acceleration blade (72), and the other end of the connecting shaft (71) is fixedly connected with a first pulley (73). The second pulley (74) is fixedly installed on the output shaft of the motor (2). The first pulley (73) and the second pulley (74) are connected by a belt transmission.

2. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 1, characterized in that: The upper side wall of the bracket (4) is symmetrically embedded with a bearing, and the connecting shaft (71) passes through the bearing.

3. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 1, characterized in that: A sealing ring is fixedly connected to the intersection of the acceleration chamber (9) and the connecting shaft (71), and the sealing ring is used to seal the connection between the acceleration chamber (9) and the connecting shaft (71).

4. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 1, characterized in that: A filter assembly (8) is installed on the air inlet end (5), the air inlet end (5) comprises an upper connecting end (51) and a lower connecting end (52), the filter assembly (8) comprises a regulating tube (81), one end of the upper connecting end (51) is fixedly mounted at the center of the regulating tube (81), and valves (83) are respectively installed on both sides of the regulating tube (81).

5. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 4, characterized in that: Both ends of the regulating tube (81) are fixedly connected to filter tubes (84), and a filter element (85) is installed inside the filter tube (84).

6. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 5, characterized in that: One end of the filter tube (84) is internally tapped to form a thread groove, and a sealing head (86) is threadedly connected to the thread groove.

7. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 5, characterized in that: One-way tubes (87) are fixedly connected to opposite sides of the two filter tubes (84), a flow tube (88) is fixedly connected to the center of the one-way tube (87), and the other end of the flow tube (88) is fixedly connected to one end of the lower connecting end (52).

8. The water ring vacuum pump capable of improving the efficiency of a condensing steam turbine according to claim 7, characterized in that: One-way valves (89) are fixedly connected to both sides of the one-way tube (87).

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