Self-balancing structure of expansion machine nozzle

Abstract

The utility model belongs to the technical field of expansion machines, and discloses an expansion machine nozzle self-balancing structure which comprises an expansion machine body, an adjusting disc is rotatably arranged in the expansion machine body and electrically connected with the expansion machine body, a small shaft is fixedly arranged on the top face of the adjusting disc, and the small shaft is fixedly connected with the expansion machine body. An impeller is fixedly arranged in the expansion machine body and penetrates through the adjusting disc, a fixing disc is fixedly arranged on the outer side of the impeller, the fixing disc and the expansion machine body are fixedly arranged, a nozzle guide vane is rotationally arranged on the bottom face of the fixing disc and attached to the adjusting disc, and an adjusting groove is formed in the surface of the nozzle guide vane; the device has the advantages that the effect of automatically balancing the pressure generated by airflow and blades in the expansion machine can be achieved, the influence of the airflow pressure on the blades of the expansion machine is reduced, and normal work of the expansion machine is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of expanders, in particular to a self-balancing structure of an expander nozzle. Background Art

[0002] An expander is a machine that uses the principle of outputting mechanical work to lower the temperature of the gas when compressed gas expands and reduces its pressure to obtain cooling capacity. Expanders are divided into two categories according to their movement form and structure: piston expanders and turbine expanders. Piston expanders are mainly suitable for small and medium-sized high- and medium-pressure cryogenic equipment with high pressure ratios and small flow rates.

[0003] At the same time, the patent specification with publication number CN 207795311 U discloses a transonic expander nozzle, including an annular baffle, a plurality of blades are arranged around the annular baffle, the annular baffle and the blades are an integrally formed part, and there is a gap between two adjacent blades, the gap is a flow channel for medium circulation, and the flow channel has an asymmetric structure.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned transonic expander nozzle device has the following problems: during the operation of the expander, the airflow will bring pressure to the expander blades, thereby increasing the friction between the blades and the nozzle, and it is impossible to achieve the effect of automatically balancing the pressure generated by the airflow and the blades inside the expander, which seriously affects the normal operation of the expander.

[0005] Therefore, in order to solve the above problems, a self-balancing structure of expander nozzle is proposed. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the utility model provides a self-balancing structure for an expander nozzle, which has the advantage of automatically balancing the pressure generated by the airflow and the internal blades of the expander, reducing the impact of the airflow pressure on the expander blades, reducing the friction between the blades and the nozzle, and ensuring the normal operation of the expander.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an expander nozzle self-balancing structure, comprising an expander body, an adjusting disk rotatably arranged inside the expander body, and the adjusting disk is electrically connected to the expander body, a small shaft is fixedly arranged on the top surface of the adjusting disk, an impeller is fixedly arranged inside the expander body, and the impeller passes through the adjusting disk, a fixed disk is fixedly arranged on the outside of the impeller, and the fixed disk is fixed to the expander body, a nozzle guide vane is rotatably arranged on the bottom surface of the fixed disk, and the nozzle guide vane is fitted with the adjusting disk, an adjusting groove is opened on the surface of the nozzle guide vane, and the small shaft on the top surface of the adjusting disk slides inside the adjusting groove.

[0008] Preferably, an air duct is fixedly provided inside the expander body, and the bottom surface of the air duct is in contact with the fixing plate.

[0009] Preferably, a fixing plate is fixedly provided on the outer side of the air guide duct, a motor is fixedly provided on the outer side of the fixing plate, and a pressure sensor is fixedly provided on the outer side of the motor.

[0010] Preferably, a transmission wheel is fixedly provided at the end of the main shaft of the motor, a linkage belt is rotatably provided on the outer side of the transmission wheel, and an adjusting fan blade is rotatably provided on the other end of the linkage belt.

[0011] Preferably, a threaded cover is spirally connected to the top surface of the air guide duct, a latch is fixedly provided inside the bottom surface of the threaded cover, and a fixed fan blade is fixedly provided inside the threaded cover.

[0012] Preferably, a fixing sleeve is fixedly provided on the bottom surface of the adjusting blade, and a clamping shaft is slidably provided inside the fixing sleeve.

[0013] Preferably, a spring is sleeved on the tail of the clamping shaft, and the spring fits in the interior of the fixing sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model adjusts the opening angle of the nozzle guide vane by rotating the adjusting disk, and the motor drives the adjusting blade to rotate, and then adjusts the gap between the blade and the transmission wheel, so as to achieve the effect of automatically balancing the pressure generated by the airflow and the blades inside the expander, and has the effects of reducing the influence of the airflow pressure on the expander blades, reducing the friction between the blades and the nozzle, and ensuring the normal operation of the expander. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an expander nozzle self-balancing structure proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the expander proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the impeller installation structure proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the adjustable fan proposed by the utility model.

[0020] In the figure: 1. expander body; 2. air guide duct; 3. fixing plate; 4. motor; 5. threaded cover; 6. fixing blades; 7. adjusting blades; 8. transmission wheel; 9. linkage belt; 10. spring; 11. clamping shaft; 12. adjusting disk; 13. nozzle guide vane; 14. fixing disk; 15. impeller; 16. adjusting groove; 17. clamping teeth; 18. fixing sleeve. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figures 1 to 4 As shown, the utility model provides an expander nozzle self-balancing structure, including an expander body 1, an adjusting disk 12 is rotatably provided inside the expander body 1, and the adjusting disk 12 is electrically connected to the expander body 1, a small shaft is fixedly provided on the top surface of the adjusting disk 12, an impeller 15 is fixedly provided inside the expander body 1, and the impeller 15 passes through the adjusting disk 12, a fixed disk 14 is fixedly provided on the outside of the impeller 15, and the fixed disk 14 is fixedly provided with the expander body 1, a nozzle guide vane 13 is rotatably provided on the bottom surface of the fixed disk 14, and the nozzle guide vane 13 is fitted with the adjusting disk 12, an adjusting groove 16 is opened on the surface of the nozzle guide vane 13, and the small shaft on the top surface of the adjusting disk 12 slides inside the adjusting groove 16, and the adjusting disk 12 automatically senses the pressure to start the adjustment mode, which is more accurate and more convenient, because it is inside the expander body 1, it is inconvenient to manually adjust it manually, and at the same time, the small shaft on the top surface of the adjusting disk 12 slides along the inside of the adjusting groove 16 to adjust the nozzle guide vane 13, thereby adapting to the internal pressure.

[0023] Specifically, an air duct 2 is fixedly disposed inside the expander body 1, and the bottom surface of the air duct 2 is in contact with the fixed plate 14, so that the air duct 2 plays a role in guiding wind force.

[0024] Furthermore, a fixing plate 3 is fixedly provided on the outer side of the air duct 2, a motor 4 is fixedly provided on the outer side of the fixing plate 3, and a pressure sensor is fixedly provided on the outer side of the motor 4. When the pressure sensor senses that the internal pressure is too high, the motor 4 is automatically turned on, which is more flexible and convenient.

[0025] Furthermore, a transmission wheel 8 is fixedly provided at the end of the main shaft of the motor 4, and a linkage belt 9 is rotatably provided on the outer side of the transmission wheel 8. An adjusting blade 7 is rotatably provided on the other end of the linkage belt 9. The motor 4 drives the adjusting blade 7 to rotate, thereby adjusting the gap between the adjusting blade 7 and the fixed blade 6 to adapt to the wind pressure.

[0026] It is worth mentioning that the top surface of the air duct 2 is spirally connected with a threaded cover 5, the bottom surface of the threaded cover 5 is fixedly provided with latch teeth 17, the inside of the threaded cover 5 is fixedly provided with fixed fan blades 6, and the threaded cover 5 is detachable, which increases the flexibility of the device.

[0027] It is worth noting that a fixing sleeve 18 is fixedly provided on the bottom surface of the adjusting blade 7, and a clamping shaft 11 is slidably provided inside the fixing sleeve 18, and the clamping shaft 11 plays a fixing role.

[0028] It is worth mentioning that a spring 10 is sleeved at the tail of the clamping shaft 11 , and the spring 10 fits in the interior of the fixing sleeve 18 . The spring 10 can push the clamping shaft 11 to cause the clamping shaft 11 to be quickly clamped into the clamping teeth 17 .

[0029] Among them, the motor 4 is the prior art and will not be described in detail. At the same time, the utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail. The "front, back, left and right" perspectives of the device are as follows: Figure 1 The direction shown in the figure is used as the reference.

[0030] Working principle and process:

[0031] When the expander body 1 is working, the gas passes through the impeller 15 and causes pressure at the same time. The adjusting disk 12 will automatically sense the size of the pressure, and through its own rotation, it drives the small surface shaft to move inside the adjusting groove 16 opened on the surface of the nozzle guide vane 13. During the movement, the opening angle of the nozzle guide vane 13 is adjusted to adapt to the pressure brought by the gas. At the same time, the fixed disk 14 is used to penetrate the nozzle guide vane 13, which not only provides a rotation point for the nozzle guide vane 13, but also because the fixed disk 14 is fixedly connected to the expander body 1, it can also prevent the nozzle guide vane 13 from falling when rotating. A second adjusting component is also provided on the right side of the impeller 15. If the adjustment effect on the left side cannot reach the ideal effect, another adjusting component is started. When the gas passes through the air duct 2 and reaches the threaded cover 5, the motor 4 will automatically sense the pressure. When the pressure is too high, the motor 4 will automatically The driving wheel 8 starts to rotate and drives the linkage belt 9 and the adjusting blade 7, thereby changing the gap between the adjusting blade 7 and the fixed blade 6 to adapt to the internal pressure. A latch tooth 17 is fixedly arranged inside the threaded cover 5, and a fixed sleeve 18 is fixedly arranged on the bottom surface of the adjusting blade 7. When the adjusting blade 7 rotates, the latch shaft 11 collides with the latch tooth 17. At the same time, the latch shaft 11 squeezes the spring 10 inside the fixed sleeve 18 and continuously recovers it to the inside of the fixed sleeve 18, and finally pops out at the next tooth position. The fixing plate 3 at the top of the air guide 2 is used to fix the motor 4. This device realizes the effect of automatically balancing the pressure generated by the airflow and the internal blades of the expander, and has the effects of reducing the influence of the airflow pressure on the expander blades, reducing the friction between the blades and the nozzle, and ensuring the normal operation of the expander.

[0032] 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.

[0033] 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. An expander nozzle self-balancing structure, comprising an expander body (1), characterized in that: An adjusting disk (12) is rotatably arranged inside the expander body (1), and the adjusting disk (12) is electrically connected to the expander body (1); a small shaft is fixedly arranged on the top surface of the adjusting disk (12); an impeller (15) is fixedly arranged inside the expander body (1), and the impeller (15) passes through the adjusting disk (12); a fixed disk (14) is fixedly arranged on the outer side of the impeller (15), and the fixed disk (14) is fixedly arranged on the expander body (1); a nozzle guide vane (13) is rotatably arranged on the bottom surface of the fixed disk (14), and the nozzle guide vane (13) is fitted with the adjusting disk (12); an adjusting groove (16) is opened on the surface of the nozzle guide vane (13), and the small shaft on the top surface of the adjusting disk (12) slides inside the adjusting groove (16).

2. The expander nozzle self-balancing structure according to claim 1, characterized in that: An air duct (2) is fixedly arranged inside the expander body (1), and the bottom surface of the air duct (2) is in contact with the fixing plate (14).

3. The expander nozzle self-balancing structure according to claim 2, characterized in that: A fixing plate (3) is fixedly arranged on the outer side of the air guide duct (2), a motor (4) is fixedly arranged on the outer side of the fixing plate (3), and a pressure sensor is fixedly arranged on the outer side of the motor (4).

4. The expander nozzle self-balancing structure according to claim 3, characterized in that: A transmission wheel (8) is fixedly arranged at the end of the main shaft of the motor (4), a linkage belt (9) is rotatably arranged on the outer side of the transmission wheel (8), and an adjusting blade (7) is rotatably arranged on the other end of the linkage belt (9).

5. The expander nozzle self-balancing structure according to claim 3, characterized in that: The top surface of the air guide duct (2) is spirally connected to a threaded cover (5), the bottom surface of the threaded cover (5) is fixedly provided with latch teeth (17), and the interior of the threaded cover (5) is fixedly provided with fixed blades (6).

6. The expander nozzle self-balancing structure according to claim 4, characterized in that: A fixing sleeve (18) is fixedly arranged on the bottom surface of the adjusting blade (7), and a clamping shaft (11) is slidably arranged inside the fixing sleeve (18).

7. The expander nozzle self-balancing structure according to claim 6, characterized in that: The tail of the clamping shaft (11) is sleeved with a spring (10), and the spring (10) fits closely with the inside of the fixing sleeve (18).

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