CN115163580B - Variable performance vapor injection compressor - Google Patents
Variable performance vapor injection compressor Download PDFInfo
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- CN115163580B CN115163580B CN202210775850.3A CN202210775850A CN115163580B CN 115163580 B CN115163580 B CN 115163580B CN 202210775850 A CN202210775850 A CN 202210775850A CN 115163580 B CN115163580 B CN 115163580B
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- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 230000008602 contraction Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 26
- 210000004907 gland Anatomy 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000010425 asbestos Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/18—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for compressing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/48—Control
- F04F5/50—Control of compressing pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention belongs to the technical field of vapor injection compressors, and particularly relates to a vapor injection compressor with variable working performance. According to the invention, the throat flow passage area of the Laval nozzle is changed by axial movement of the baffle rod, so that the jet flow of high-pressure steam is changed; the distance between the outlet end face of the Laval nozzle and the inlet end face of the contraction section of the diffusion pipe is adjusted by changing the thickness and the quantity of the adjusting flanges, so that the injection flow of low-pressure steam is changed. The invention realizes the independent adjustment of the throat area of the nozzle and the interval between the nozzle outlet and the inlet of the contraction section of the mixing chamber, thereby being capable of efficiently adjusting the working performance of the steam jet compressor to the optimal state according to the change of working condition parameters, realizing the function of adjusting the working performance of the steam jet under different working conditions and ensuring that the operation characteristic of the steam jet is always in a good state.
Description
Technical Field
The invention belongs to the technical field of vapor injection compressors, and particularly relates to a vapor injection compressor with variable working performance.
Background
The steam jet compressor is an emerging technology in the field of energy conservation and efficiency improvement of a dead steam heating system of an air cooling unit of a power plant. Based on the aerodynamic principle, high-pressure steam extraction is adopted as power to boost the pressure of the extracted low-pressure exhaust steam, so that the quality of the exhaust steam is improved, and the waste heat energy is recovered. The steam jet compressor has the best operation condition, under the condition, the injection performance of the steam jet compressor can reach the best state, and the injection capacity of high-pressure steam can reach the peak value. Once the operating conditions deviate from the optimum, the performance of the vapor injection compressor will be greatly reduced, resulting in reduced energy recovery efficiency. Therefore, the vapor injection compressor needs to adjust key structural parameters in time for the change of working condition parameters.
Structural parameters affecting the performance of the vapor jet compressor include primarily the laval nozzle throat diameter and the distance of the nozzle outlet from the inlet of the constriction of the mixing chamber. Most of the related devices with adjustable working performance currently available can only adjust one size, so that the adjustable working parameter range of the steam jet compressor is smaller, and the adjusting capability is lower. In the patent specification with publication number CN201010186622, an ejector is disclosed in which the nozzle-to-mixing chamber inlet distance and the nozzle critical cross-sectional area are adjustable. The ejector can realize linkage adjustment of the critical section of the nozzle throat and the distance between the nozzle and the inlet of the mixing chamber, but cannot realize independent and accurate adjustment of two parameters, so that the optimal ejector critical dimension combination cannot be adjusted, and the ejector performance cannot be guaranteed to reach the optimal state. In addition, during the adjustment of the throat area of the nozzle, if the driving mechanism fails to cause the throat flow area to be too small or even the throat to be blocked, the pressure of the high-pressure steam pipeline is suddenly increased, so that an overpressure accident occurs.
Disclosure of Invention
The object of the present invention is to provide a variable performance vapor injection compressor.
A variable performance vapor injection compressor includes a lever, a high pressure inlet chamber, a receiving chamber, a nozzle, a mixing chamber; the high-pressure steam inlet chamber is provided with a high-pressure steam inlet connecting pipe; the input end of the nozzle is connected with the high-pressure steam inlet chamber, and the output end of the nozzle is arranged at the inlet of the mixing chamber; the output end of the nozzle and the inlet of the mixing chamber are integrally arranged in the receiving chamber; the receiving chamber is provided with a low-pressure steam inlet connecting pipe; one end of the baffle rod is connected with the actuating mechanism, and the other end of the baffle rod penetrates through the high-pressure steam inlet chamber and extends to the output end of the nozzle; the actuating mechanism is used for controlling the axial movement of the gear lever, and the flow passage area of the throat part of the output end of the nozzle is changed through the axial movement of the gear lever, so that the jet flow of high-pressure steam is regulated.
Further, the mixing chamber comprises a converging section, a cylindrical section, and an diverging section; the contraction section, the cylindrical section and the expansion section are coaxially and sequentially connected, and the contraction section stretches into the receiving chamber; the receiving chamber is connected with the mixing chamber through the adjusting flange, and the distance between the output end of the nozzle and the inlet end face of the contraction section of the mixing chamber is adjusted through the adjusting flange, so that the injection flow of low-pressure steam is adjusted.
Further, the outer surfaces of the contraction section and the cylindrical section initial section are cylindrical surfaces, the adjusting flanges are sleeved on the outer sides of the cylindrical surfaces, and the distance between the output end of the nozzle and the inlet end face of the contraction section of the mixing chamber is adjusted by changing the number and the thickness of the adjusting flanges.
Further, the high-pressure steam inlet chamber is of a T-shaped structure, the high-pressure steam inlet connecting pipe is arranged at the bottom of the T shape, one end of the upper part of the T shape is connected with the actuating mechanism through the bracket, and the other end of the upper part of the T shape is connected with the input end of the nozzle.
Further, the end part of the high-pressure steam inlet chamber connected with the bracket is provided with a concentric double-layer bolt connecting surface, the outer layer is connected with the bracket through a bolt, and the inner layer is connected with the gland through a bolt; the connection surface of the baffle rod and the high-pressure steam inlet chamber is sealed by the gland and the asbestos packing, and the asbestos packing is extruded by screwing a bolt on the gland, so that the tightness between the baffle rod and the high-pressure steam inlet chamber is ensured, and high-pressure steam is prevented from leaking.
Further, one end of the baffle rod is provided with an internal thread for being connected with a push rod of the actuating mechanism, the other end of the baffle rod is provided with a conical surface, and the tip of the cone is processed into a hemispherical shape; the stop rod is provided with the limit ring, when the stop rod moves to a limit distance, the limit ring is contacted with the gland, the stop rod is prevented from continuously extending into the nozzle, and the phenomenon that the pressure of the high-pressure steam pipeline rises and exceeds the limit due to the fact that the nozzle is completely blocked is avoided.
Further, the device also comprises a positioning ring; the positioning ring comprises an outer circular tube and an inner circular tube which are concentrically arranged, and the outer circular tube and the inner circular tube are connected through rib plates which are arranged at equal intervals; the positioning ring is arranged in the high-pressure steam inlet chamber and is close to the nozzle side; the baffle rod penetrates through the inner circular tube of the positioning ring and then extends into the nozzle; the baffle rod is supported by adjusting the outer diameter of the outer circular tube, the inner diameter of the inner circular tube and the coaxiality of the sections of the inner circular tube and the nozzle outlet, so that the baffle rod is prevented from deforming, the annular gap of high-pressure steam circulation is ensured to be uniformly distributed in the circumferential direction, the flow resistance is reduced, and the vibration of the baffle rod is reduced.
Further, the bracket comprises a flange and angle steel, the angle steel is arranged at equal intervals along the circumferential direction of the flange, and the length of the angle steel is determined according to the difference between the moving length of the push rod of the actuating mechanism and the actual moving length of the stop rod; through reasonable setting of the angle steel length of the support, the phenomenon that the size of the actuating mechanism is not matched with the size of the gear lever can be avoided, and the requirement of the steam jet compressor on the speciality of the actuating mechanism is reduced.
Further, the nozzle adopts a Laval nozzle.
The invention has the beneficial effects that:
According to the invention, the throat flow passage area of the Laval nozzle is changed by axial movement of the baffle rod, so that the jet flow of high-pressure steam is changed; the distance between the outlet end face of the Laval nozzle and the inlet end face of the contraction section of the diffusion pipe is adjusted by changing the thickness and the quantity of the adjusting flanges, so that the injection flow of low-pressure steam is changed. The invention realizes the independent adjustment of the throat area of the nozzle and the interval between the nozzle outlet and the inlet of the contraction section of the mixing chamber, thereby being capable of efficiently adjusting the working performance of the steam jet compressor to the optimal state according to the change of working condition parameters, realizing the function of adjusting the working performance of the steam jet under different working conditions and ensuring that the operation characteristic of the steam jet is always in a good state.
Drawings
Fig. 1 is a schematic view of a variable performance vapor injection compressor according to the present invention.
FIG. 2 is an end view of a retaining ring according to the present invention.
Fig. 3 is an end view of a stent according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides a variable-working-performance steam jet compressor, which comprises a baffle rod 6, a high-pressure steam inlet chamber 7, a receiving chamber 10, a nozzle 11 and a mixing chamber 14; the high-pressure steam inlet chamber 7 is provided with a high-pressure steam inlet connecting pipe 19; the input end of the nozzle 11 is connected with the high-pressure steam inlet chamber 7, and the output end of the nozzle 11 is arranged at the inlet of the mixing chamber 14; the output end of the nozzle 11 is arranged integrally with the inlet of the mixing chamber 14 inside the receiving chamber 10; the receiving chamber 10 is provided with a low pressure steam inlet connection 18; one end of the baffle rod 6 is connected with the actuating mechanism, and the other end of the baffle rod passes through the high-pressure steam inlet chamber 7 and extends to the output end of the nozzle 11; the actuating mechanism is used for controlling the axial movement of the gear lever 6, and the axial movement of the gear lever 6 changes the flow passage area of the throat part of the output end of the nozzle 11 so as to regulate the jet flow of high-pressure steam.
Example 1:
The mixing chamber 14 comprises a convergent section 17, a cylindrical section 16 and an divergent section 15; the contraction section 17, the cylindrical section 16 and the expansion section 15 are coaxially and sequentially connected, and the contraction section 17 stretches into the receiving chamber 10; the receiving chamber 10 is connected with the mixing chamber 14 through the adjusting flange 12, and the distance between the output end of the nozzle 11 and the inlet end face of the contraction section 17 of the mixing chamber 14 is adjusted through the adjusting flange 12, so that the injection flow of low-pressure steam is adjusted.
Example 2:
The outer surfaces of the contraction section 17 and the initial section of the cylindrical section 16 are cylindrical surfaces, the adjusting flange 12 is sleeved outside the cylindrical surfaces, and the distance between the output end of the nozzle 11 and the inlet end surface of the contraction section 17 of the mixing chamber 14 is adjusted by changing the number and the thickness of the adjusting flange 12.
Example 3:
The high-pressure steam inlet chamber 7 is of a T-shaped structure, the high-pressure steam inlet connecting pipe 19 is arranged at the bottom of the T shape, one end of the upper part of the T shape is connected with the actuating mechanism through a bracket 22, and the other end of the upper part of the T shape is connected with the input end of the nozzle 11.
Example 4:
The end part of the high-pressure steam inlet chamber 7 connected with the support 22 is provided with a concentric double-layer bolt connecting surface, the outer layer is connected with the support 22 through bolts, and the inner layer is connected with the gland 4 through bolts; the connection surface of the baffle rod 6 and the high-pressure steam inlet chamber 7 is sealed by the gland 4 and the asbestos packing 5, and the asbestos packing 5 is extruded by screwing the bolt on the gland 4, so that the tightness between the baffle rod 6 and the high-pressure steam inlet chamber 7 is ensured, and the leakage of high-pressure steam is prevented.
Example 5:
One end of the baffle rod 6 is provided with an internal thread for being connected with the push rod 1 of the actuating mechanism, the other end of the baffle rod 6 is provided with a conical surface, and the tip of the cone is processed into a hemispherical shape; the stop rod 6 is provided with the stop ring 21, when the stop rod 6 moves to a limit distance, the stop ring 21 contacts with the gland 4 to prevent the stop rod 6 from continuously extending into the nozzle 11, so that the phenomenon that the pressure of the high-pressure steam pipeline rises to be over-limited due to the fact that the nozzle 11 is completely blocked is avoided.
Example 6:
also comprises a positioning ring 8; the positioning ring 8 comprises an outer circular tube 25 and an inner circular tube 26 which are concentrically arranged, and the outer circular tube 25 and the inner circular tube 26 are connected through rib plates 24 which are arranged at equal intervals; the positioning ring 8 is arranged in the high-pressure steam inlet chamber 7 and is close to the side of the nozzle 11; the baffle rod 6 passes through the inner circular tube 26 of the positioning ring 8 and then extends into the nozzle 11; the baffle rod 6 is supported by adjusting the outer diameter of the outer circular tube 25, the inner diameter of the inner circular tube 26 and the coaxiality of the outlet section of the inner circular tube 26 and the nozzle 11, so that the baffle rod 6 is prevented from deforming, the annular gap for high-pressure steam circulation is ensured to be uniformly distributed in the circumferential direction, the flow resistance is reduced, and the vibration of the baffle rod 6 is reduced.
Example 7:
The bracket 22 comprises a flange 2 and angle steels 3, the angle steels 3 are arranged at equal intervals along the circumferential direction of the flange 2, and the length of the angle steels 3 is determined according to the difference between the moving length of the push rod 1 of the actuating mechanism and the actual moving length of the stop rod 6; by reasonably setting the length of the angle steel 3 of the bracket 22, the phenomenon that the size of the actuating mechanism is not matched with the size of the baffle rod 6 can be avoided, and the requirement of the steam jet compressor on the speciality of the actuating mechanism is reduced.
Example 8:
As shown in fig. 1, the invention provides a variable-operation-performance steam jet compressor, which mainly comprises a high-pressure steam inlet chamber 7, a laval nozzle 11, a receiving chamber 10, a mixing chamber 14, a baffle rod 6, an electric actuator, a bracket 22 and an adjusting flange 12. The high-pressure steam inlet chamber 7 is of a T-shaped structure, one end of the high-pressure steam inlet chamber is connected with the electric actuator through a bracket 22, one end of the high-pressure steam inlet chamber is provided with a high-pressure steam inlet connecting pipe 19, and the Laval nozzle 11 is clamped in the high-pressure steam inlet chamber through the stud 9 and the receiving chamber 10. The connecting flange 13 outside the mixing chamber clamps a number of adjusting flanges 12 therein with the receiving chamber 10 by means of studs 9. The receiving chamber 10 is provided with a low pressure steam inlet connection 18 communicating with the interior cavity of the receiving chamber 10. One end of the baffle rod 6 is connected with the push rod 1 of the electric actuator through threads, and the other end of the baffle rod penetrates into the Laval nozzle 11 through the high-pressure steam inlet chamber 7. The mixing chamber 14 is divided into a coaxial constriction 17, a cylindrical section 16 and an expansion section 15. The constriction 17 extends into the receiving chamber 10 and communicates with the interior of the receiving chamber 10. The outer surfaces of the initial sections of the contraction section 17 and the cylindrical section 16 are cylindrical surfaces, and the cylindrical surfaces are adopted to replace the conventional frustum surfaces outside the contraction section, so that the manufacturing difficulty of the adjusting flange can be reduced, the applicability of the adjusting flange is enhanced, and the flexibility of structural adjustment of the steam jet compressor is improved. The adjusting flange 12 is sleeved outside the cylindrical surface and is connected with the receiving chamber through a stud bolt. The thickness and number of the adjusting flanges 12 can be adjusted according to the range of the distance between the outlet of the laval nozzle 11 and the inlet of the constriction 17.
The flow area of the throat part of the Laval nozzle 11 can be changed by controlling the length of the baffle rod 6 extending into the Laval nozzle 11; by varying the number and thickness of the adjustment flanges 12, the distance between the inlet of the constriction 17 of the mixing chamber 14 and the outlet of the laval nozzle 11 can be varied. The two key dimensions can be reasonably set according to the actual operation condition, so that the working performance of the steam jet compressor reaches the optimal state.
One end of the gear lever 6 is provided with an internal thread and is used for being connected with a push rod 1 of an electric actuating mechanism with an external thread; one end of the nozzle has a conical surface, and the tip is hemispherical, so that the axial cross-sectional area of the Laval nozzle 11 can be changed smoothly, and the flow resistance is reduced. The stop lever 6 is provided with a stop collar 21, the mounting position of which is determined by the maximum distance the stop lever 6 extends into the laval nozzle 11. When the stop lever 6 moves to the limit distance, the limit ring 21 is contacted with the gland 4 to prevent the stop lever 6 from continuously extending into the Laval nozzle 11, so that the situation that the insertion depth of the stop lever exceeds the limit under the condition that an actuating mechanism fails can be avoided, the nozzle is completely blocked to cause the pressure of the high-pressure steam pipeline to rise to exceed the limit, the safety of the steam injection compressor is greatly improved, and the occurrence of overpressure of the high-pressure steam pipeline is prevented.
One end of the high-pressure steam inlet chamber 7 is provided with a concentric double-layer bolt connecting surface, one layer is connected with a bracket 22 through bolts, and the other layer is connected with a gland 4 through bolts 20. By screwing the bolt 20, the gland 4 presses the asbestos packing 5, thereby sealing the gap between the baffle rod 6 and the through hole of the high-pressure steam inlet chamber 7, and preventing the high-pressure steam from leaking. The positioning ring 8 is installed in the high-pressure steam inlet chamber and is close to the Laval nozzle 11 side. The baffle rod passes through the circular tube at the inner side of the positioning ring 8 and then stretches into the Laval nozzle. As shown in fig. 2, the positioning ring 8 is formed by connecting an outer circular tube 25 and an inner circular tube 26 which are concentrically arranged, through ribs 24 which are arranged at equal intervals. In the manufacturing and mounting process of the positioning ring 8, the baffle rod 6 can be supported by strictly controlling the outer diameter of the outer circular tube 25 and the inner diameter of the inner circular tube 26 and the coaxiality of the outlet section of the inner circular tube 26 and the Laval nozzle 11, so that the baffle rod is prevented from deforming, the circumferential distribution of an annular gap through which high-pressure steam flows is ensured to be uniform, the flow resistance is reduced, and the vibration of the baffle rod is reduced.
As shown in fig. 3, the bracket 22 is composed of a flange 2 and angle steel 3, the angle steel 3 is equally spaced along the circumferential direction of the flange 2, and the length is determined according to the difference between the moving length of the push rod 1 and the actual moving length of the stop rod 6. By reasonably setting the length of the angle steel 3 of the bracket 22, the phenomenon that the size of the electric actuating mechanism is not matched with the size of the gear lever 6 can be avoided, and the requirement of the steam jet compressor on the special matching property of the electric actuating mechanism is reduced.
According to the steam jet compressor with variable working performance, the throat flow area of the Laval nozzle can be changed through axial movement of the gear lever, so that the jet flow of high-pressure steam is changed; meanwhile, the distance between the outlet end face of the Laval nozzle and the inlet end face of the contraction section of the diffusion pipe can be adjusted by changing the thickness and the quantity of the adjusting flanges, so that the injection flow of low-pressure steam is changed. The two modes are combined, so that the function of adjusting the working performance of the steam injector under different working conditions is finally realized, and the running characteristic of the steam injector is ensured to be in a good state all the time.
The invention realizes independent adjustment of the throat area of the nozzle and the interval between the nozzle outlet and the inlet of the contraction section of the mixing chamber, thereby being capable of efficiently adjusting the working performance of the steam jet compressor to the optimal state according to the change of working condition parameters. The bracket can be directionally designed according to the sizes of the electric actuating mechanism and the gear lever, so that the design requirement on the electric actuating mechanism can be reduced, and the whole manufacturing cost and the assembly difficulty of the equipment are reduced. The limit ring can prevent the axial movement distance of the baffle rod from exceeding the limit, prevent the occurrence of the overpressure accident of the high-pressure steam pipeline caused by the blockage of the nozzle, and remarkably improve the safety and reliability of the steam jet compressor.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A variable performance vapor injection compressor characterized by: comprises a baffle rod (6), a high-pressure steam inlet chamber (7), a receiving chamber (10), a nozzle (11) and a mixing chamber (14); the high-pressure steam inlet chamber (7) is provided with a high-pressure steam inlet connecting pipe (19); the input end of the nozzle (11) is connected with the high-pressure steam inlet chamber (7), and the output end of the nozzle (11) is arranged at the inlet of the mixing chamber (14); the outlet end of the nozzle (11) is arranged integrally with the inlet of the mixing chamber (14) in the receiving chamber (10); the receiving chamber (10) is provided with a low-pressure steam inlet connecting pipe (18); one end of the baffle rod (6) is connected with the actuating mechanism, and the other end of the baffle rod penetrates through the high-pressure steam inlet chamber (7) and extends to the output end of the nozzle (11); the actuating mechanism is used for controlling the axial movement of the gear lever (6), and the flow passage area of the throat part of the output end of the nozzle (11) is changed through the axial movement of the gear lever (6), so that the jet flow of high-pressure steam is regulated;
The mixing chamber (14) comprises a convergent section (17), a cylindrical section (16) and an divergent section (15); the contraction section (17), the cylindrical section (16) and the expansion section (15) are coaxially and sequentially connected, and the contraction section (17) stretches into the receiving chamber (10); the receiving chamber (10) is connected with the mixing chamber (14) through the adjusting flange (12), and the distance between the output end of the nozzle (11) and the inlet end face of the contraction section (17) of the mixing chamber (14) is adjusted through the adjusting flange (12), so that the injection flow of low-pressure steam is adjusted;
The outer surfaces of the contraction section (17) and the initial section of the cylindrical section (16) are cylindrical surfaces, the adjusting flange (12) is sleeved on the outer side of the cylindrical surfaces, and the distance between the output end of the nozzle (11) and the inlet end surface of the contraction section (17) of the mixing chamber (14) is adjusted by changing the number and the thickness of the adjusting flange (12);
The high-pressure steam inlet chamber (7) is of a T-shaped structure, the high-pressure steam inlet connecting pipe (19) is arranged at the bottom of the T shape, one end of the upper part of the T shape is connected with the executing mechanism through the bracket (22), and the other end of the upper part of the T shape is connected with the input end of the nozzle (11);
one end of the baffle rod (6) is provided with an internal thread and is used for being connected with a push rod (1) of the actuating mechanism, the other end of the baffle rod (6) is provided with a conical surface, and the tip of the cone is processed into a hemispherical shape; a limit ring (21) is arranged on the baffle rod (6), when the baffle rod (6) moves to a limit distance, the limit ring (21) contacts with the gland (4) to prevent the baffle rod (6) from continuously extending into the nozzle (11), so that the phenomenon that the pressure of the high-pressure steam pipeline rises and exceeds the limit caused by completely blocking the nozzle (11) is avoided;
Also comprises a positioning ring (8); the positioning ring (8) comprises an outer circular tube (25) and an inner circular tube (26) which are concentrically arranged, and the outer circular tube (25) and the inner circular tube (26) are connected through rib plates (24) which are arranged at equal intervals; the positioning ring (8) is arranged in the high-pressure steam inlet chamber (7) and is close to the side of the nozzle (11); the baffle rod (6) passes through an inner circular tube (26) of the positioning ring (8) and then extends into the nozzle (11); the baffle rod (6) is supported by adjusting the outer diameter of the outer circular tube (25), the inner diameter of the inner circular tube (26) and the coaxiality of the inner circular tube (26) and the outlet section of the nozzle (11), so that the baffle rod is prevented from deforming, the annular gap in which high-pressure steam flows is ensured to be uniformly distributed in the circumferential direction, the flow resistance is reduced, and the vibration of the baffle rod (6) is reduced;
The support (22) comprises a flange (2) and angle steels (3), the angle steels (3) are arranged at equal intervals along the circumferential direction of the flange (2), and the length of the angle steels (3) is determined according to the difference between the moving length of a push rod (1) of the actuating mechanism and the actual moving length of the stop rod (6).
2. A variable performance vapor injection compressor as set forth in claim 1 wherein: the end part of the high-pressure steam inlet chamber (7) connected with the support (22) is provided with a concentric double-layer bolt connecting surface, the outer layer is connected with the support (22) through a bolt, and the inner layer is connected with the gland (4) through a bolt; the connection surface of the baffle rod (6) and the high-pressure steam inlet chamber (7) is sealed by the gland (4) and the asbestos packing (5), and the asbestos packing (5) is extruded by screwing a bolt on the gland (4), so that the tightness between the baffle rod (6) and the high-pressure steam inlet chamber (7) is ensured, and high-pressure steam leakage is prevented.
3. A variable performance vapor injection compressor as set forth in claim 1 wherein: the nozzle (11) is a Laval nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775850.3A CN115163580B (en) | 2022-07-03 | 2022-07-03 | Variable performance vapor injection compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210775850.3A CN115163580B (en) | 2022-07-03 | 2022-07-03 | Variable performance vapor injection compressor |
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| Publication Number | Publication Date |
|---|---|
| CN115163580A CN115163580A (en) | 2022-10-11 |
| CN115163580B true CN115163580B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210775850.3A Active CN115163580B (en) | 2022-07-03 | 2022-07-03 | Variable performance vapor injection compressor |
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| CN213954013U (en) * | 2020-11-20 | 2021-08-13 | 鞍山创新实业有限公司 | Injection pump easy to adjust |
| CN214618384U (en) * | 2021-05-27 | 2021-11-05 | 厦门海源泵业有限公司 | Water supply equipment is with pipeline trace telescopic machanism |
| CN215171107U (en) * | 2021-05-26 | 2021-12-14 | 江苏博际喷雾***股份有限公司 | Adjustable energy-saving high-efficiency steam jet pump nozzle |
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| CN213954013U (en) * | 2020-11-20 | 2021-08-13 | 鞍山创新实业有限公司 | Injection pump easy to adjust |
| CN215171107U (en) * | 2021-05-26 | 2021-12-14 | 江苏博际喷雾***股份有限公司 | Adjustable energy-saving high-efficiency steam jet pump nozzle |
| CN214618384U (en) * | 2021-05-27 | 2021-11-05 | 厦门海源泵业有限公司 | Water supply equipment is with pipeline trace telescopic machanism |
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| CN115163580A (en) | 2022-10-11 |
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