An adjustable nozzle

Abstract

This utility model discloses an adjustable nozzle, belonging to the technical field of inlet adjustable nozzles. It includes a mounting ring with several connecting holes evenly distributed around its circumference. A connecting shaft is rotatably fitted into each connecting hole. One end of the connecting shaft is fixedly connected to a blade, and the other end is fixedly connected to a crank handle. It also includes a rotating ring, with the rotating ring and crank handle located on the same side of the mounting ring. The rotating ring is coaxially rotatably connected to the mounting ring. Several radially open slots are evenly distributed around the outer wall of the rotating ring. A pin is rotatably connected to the end of the crank handle, and the pin engages in one of the radially open slots. When the rotating ring rotates, the radially open slots drive the connecting shaft to rotate via the pin and crank handle. The rotating connecting shaft then causes the blade to oscillate synchronously. This structure reduces wear and ensures long-term transmission accuracy and service life.

Description

Technical Field

[0001] This utility model relates to the field of adjustable inlet nozzle technology, specifically to an adjustable nozzle. Background Technology

[0002] Nozzles are widely used in expanders, compressors, booster compressors and other fields, and the amount of medium fed in can be precisely adjusted by adjusting the nozzle opening.

[0003] Because the nozzle needs to be adjusted in real time according to the working conditions, the entire blade is in a state of operation for a long time, and is usually under high pressure or high temperature. The working conditions are relatively harsh, and the transmission accuracy of the nozzle is easily affected, resulting in rust and jamming, which makes it difficult to use and maintain.

[0004] Moreover, some key transmission structures are severely worn, which not only affects transmission accuracy but also service life.

[0005] To address the aforementioned problems, this invention designs and manufactures an adjustable nozzle to overcome these deficiencies. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model provides an adjustable nozzle that can reduce wear and ensure long-term transmission accuracy and service life.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an adjustable nozzle includes a mounting ring, on which a plurality of connecting holes are evenly distributed around the circumference of the mounting ring, a connecting shaft is rotatably fitted in the connecting holes, a blade is fixedly connected to one end of the connecting shaft, and a crank is fixedly connected to the other end of the connecting shaft;

[0008] It also includes a rotating ring, which and the rocker arm are located on the same side of the mounting ring. The rotating ring is coaxially rotatably connected to the mounting ring. The outer ring wall of the rotating ring has several radially open grooves evenly distributed around its circumference. The end of the rocker arm is provided with a mating hole, and a pin is provided in the mating hole. The pin is rotatably connected to the mating hole through a self-lubricating bushing I. The end of the pin away from the rocker arm is mated in the radially open groove.

[0009] When the rotating ring rotates, the radial opening groove drives the connecting shaft to rotate through the shaft pin and the rocker arm, and the rotating connecting shaft drives the blade to swing synchronously.

[0010] Preferably, both ends of the self-lubricating bushing I have flanges, and at least part of the flanges at both ends of the self-lubricating bushing I protrude from both sides of the crank handle.

[0011] Preferably, the outer diameter of the flange near the rotating ring is greater than the width of the radial opening groove.

[0012] Preferably, the end of the shaft pin away from the mounting ring is provided with a threaded section, the diameter of which is smaller than the diameter of the shaft pin, and a limiting washer and a nut are provided on the threaded section. The nut can position the limiting washer on the step between the shaft pin and the threaded section.

[0013] The outer diameter of the limiting pad is larger than the inner diameter of the self-lubricating bushing I.

[0014] Preferably, the connecting shaft is rotatably connected to the connecting hole via a self-lubricating bushing II;

[0015] Both ends of the self-lubricating bushing II have flanges, and at least part of the flanges at both ends of the self-lubricating bushing II protrude from both sides of the mounting ring.

[0016] Preferably, a gasket is fitted on the shaft between the crank handle and the mounting ring, and the gasket creates a gap between the crank handle and the rotating ring.

[0017] Preferably, a gap is provided between the end face of the pin near the mounting ring and the mounting ring.

[0018] Preferably, the rotating ring is provided with a plurality of rotating bearings on the circumference of the side near the mounting ring, and the bearings are connected to the rotating ring by shoulder screws;

[0019] The mounting ring has a groove on one side corresponding to the bearing position, and the rotating ring rotates on the fixed ring through several bearings and the groove.

[0020] Preferably, the annular groove is configured as a stepped groove, the stepped groove including a narrow groove near the opening of the annular groove and a wide groove located inside the annular groove;

[0021] The width of the wide slot is equal to the diameter of the bearing, and the width of the narrow slot is less than the diameter of the bearing but greater than the diameter of the shoulder screw;

[0022] The narrow groove sidewall is provided with an embedding groove corresponding to the number and position of several bearings. The embedding groove is connected to the wide groove, and the bearing can enter the wide groove through the embedding groove.

[0023] Preferably, a self-lubricating washer is fitted on the shoulder screw between the bearing and the rotating ring;

[0024] The outer diameter of the self-lubricating washer is larger than the width of the wide groove, and the self-lubricating washer is placed between the rotating ring and the mounting ring.

[0025] The advantages of this utility model are:

[0026] 1. The swing of the crank handle in this utility model is achieved by the rolling friction between the shaft pin and the radially open groove, while the swing of the crank handle in the traditional structure is achieved by the sliding friction between the end of the crank handle and the mating groove on the rotating ring. Since the rolling friction in this solution replaces the sliding friction, the rotation is flexible, and the wear problem caused by excessive friction in the traditional structure is avoided, thus improving the service life.

[0027] 2. The self-lubricating bushing I of this utility model is positioned between the mating hole and the pin, rather than directly between the pin and the radial opening groove, effectively avoiding the accuracy reduction problem caused by uneven wear of the self-lubricating bushing I. The pin and radial opening groove experience rolling friction. Since nozzle blade adjustment is often a high-frequency, small-range adjustment, the pin can be rotated a certain angle to complete the adjustment. However, because the self-lubricating bushing I is relatively soft, directly positioning it between the pin and the radial opening groove easily leads to uneven wear. During adjustment, the part that frequently contacts the radial opening groove wears more heavily, while the part that does not frequently contact it wears less, resulting in a significant decrease in transmission accuracy and continuity. By positioning the self-lubricating bushing I between the mating hole and the pin, it ensures a rolling fit between the pin and the radial opening groove, and the self-lubricating bushing I is evenly stressed and participates in friction during blade adjustment, avoiding uneven wear.

[0028] 3. This utility model utilizes a limiting pad to axially limit the self-lubricating bushing I, preventing relative movement between the self-lubricating bushing I and the shaft pin. Furthermore, a nut is used to position the limiting pad on the step between the shaft pin and the threaded section, facilitating disassembly and maintenance when the self-lubricating bushing I needs to be replaced.

[0029] 4. The self-lubricating bushing of this utility model avoids rust and jamming between the shaft pin and the mating hole, and between the connecting shaft and the connecting hole. At the same time, the flange at the end of the self-lubricating bushing can separate the crank handle and the rotating ring, as well as the blade and the mounting ring. The self-lubricating washer can separate the rotating ring and the mounting ring. By avoiding direct contact between adjacent end faces of the parts, rust and jamming are avoided. Moreover, since the self-lubricating material reduces friction, the transmission of each part is more sensitive, and the overall equipment accuracy is improved to a certain extent. Attached Figure Description

[0030] Figure 1 Rear view of an adjustable nozzle;

[0031] Figure 2 A cross-sectional view of an adjustable nozzle (AA section).

[0032] Figure 3 This is an enlarged schematic diagram of an adjustable nozzle at point A;

[0033] Figure 4 This is an enlarged schematic diagram of an adjustable nozzle at point B.

[0034] Figure 5 This is a cross-sectional view of the mounting ring of this utility model;

[0035] Figure 6 This is a rear view of the upper part of the mounting ring structure of this utility model;

[0036] Figure 7 This is an enlarged schematic diagram of point C in this utility model;

[0037] Figure 8 This is a side view of the upper part of the rotating ring structure of this utility model;

[0038] Figure 9 This is an enlarged schematic diagram of point D in this utility model.

[0039] In the diagram: 1. Mounting ring; 2. Rotating ring; 3. Handle; 4. Connecting shaft; 5. Shaft pin; 6. Blade; 7. Self-lubricating bushing I; 8. Flange; 9. Radial opening groove; 10. Washer; 11. Self-lubricating bushing II; 12. Connecting hole; 13. Mating hole; 14. Ring groove; 15. Embedded groove; 16. Bearing; 17. Shoulder screw; 18. Self-lubricating washer; 51. Threaded section; 52. Nut; 53. Limiting washer. Detailed Implementation

[0040] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0041] like Figures 1 to 9 As shown, an adjustable nozzle includes a mounting ring 1 with several connecting holes 12 evenly distributed around its circumference. A connecting shaft 4 is rotatably fitted into the connecting holes 12. One end of the connecting shaft 4 is fixedly connected to a blade 6, and the other end of the connecting shaft 4 is fixedly connected to a crank handle 3. The blade 6 and the crank handle 3 are located on opposite sides of the mounting ring 1. Specifically, the crank handle 3 swings to drive the connecting shaft 4 to rotate, which in turn drives the several blades 6 around the circumference to swing, ultimately opening and closing the air intake channel between the blades 6.

[0042] To achieve the swinging of the crank handle 3, this invention includes a rotating ring 2. The rotating ring 2 and the crank handle 3 are located on the same side of the mounting ring 1. Specifically, the rotating ring 2 is coaxially rotatably connected to the mounting ring 1. Several radially open grooves 9 are evenly distributed around the outer circumference of the rotating ring 2. A pin 5 is rotatably connected to the end of the crank handle 3, with the end of the pin 5 away from the crank handle 3 fitting into one of the radially open grooves 9. When the rotating ring 2 rotates, the radially open grooves 9 drive the connecting shaft 4 to rotate via the pin 5 and the crank handle 3. Ultimately, the rotating connecting shaft 4 drives the blade 6 to swing synchronously.

[0043] The swing of the crank handle 3 in this invention is achieved by the rolling friction between the shaft pin 5 and the radial opening groove 9. In contrast, the swing of the crank handle 3 in the traditional structure is achieved by the sliding friction between the end of the crank handle 3 and the mating groove on the rotating ring 2. Since the rolling friction in this solution replaces the sliding friction, it avoids the wear problem caused by excessive friction in the traditional structure and improves the service life of the equipment.

[0044] The crank handle 3 of this invention has a mating hole 13 at its end, and the pin 5 is rotatably connected to the mating hole 13 through a self-lubricating bushing I7. Both ends of the self-lubricating bushing I7 have flanges 8, with at least a portion of the flanges 8 protruding from both sides of the crank handle 3. The outer diameter of the flange 8 near the rotating ring 2 is larger than the width of the radial opening groove 9, allowing the flanges 8 to separate the crank handle 3 and the rotating ring 2. The self-lubricating material can be, but is not limited to, graphite brass, polytetrafluoroethylene, etc., and can be selected according to the specific application scenario.

[0045] Specifically, the self-lubricating bushing I is positioned between the mating hole 13 and the pin 5, rather than directly between the pin 5 and the radial opening groove 9. This effectively avoids the accuracy reduction problem caused by uneven wear of the self-lubricating bushing I7. The pin 5 and the radial opening groove 9 experience rolling friction. Since the nozzle blade 6 adjustment is often a high-frequency, small-range adjustment, the pin 5 can be rotated a certain angle to complete the adjustment. However, because the self-lubricating bushing I7 is relatively soft, directly positioning it between the pin 5 and the radial opening groove 9 easily leads to uneven wear. During adjustment, the part that frequently contacts the radial opening groove 9 wears more heavily, while the part that does not frequently contact it wears less, resulting in a significant decrease in transmission accuracy and continuity. By positioning the self-lubricating bushing I7 between the mating hole 13 and the pin 5, it ensures that the pin 5 and the radial opening groove 9 have a rolling fit, and that the self-lubricating bushing I7 is evenly stressed and participates in friction during blade 6 adjustment, thus avoiding uneven wear.

[0046] The present invention has a threaded section 51 at the end of the shaft pin 5 away from the mounting ring 1. The diameter of the threaded section 51 is smaller than the diameter of the shaft pin 5. A limiting pad 53 and a nut 52 are provided on the threaded section 51. The nut 52 can position the limiting pad 53 on the step between the shaft pin 5 and the threaded section 51. The outer diameter of the limiting pad 53 is larger than the inner diameter of the self-lubricating bushing I7.

[0047] By using the limiting pad 53 to axially limit the self-lubricating bushing I7, relative movement between the self-lubricating bushing I7 and the shaft pin 5 is prevented. In addition, the limiting pad 53 is positioned on the step between the shaft pin 5 and the threaded section 51 by the nut 52, which also facilitates disassembly and maintenance when the self-lubricating bushing I7 needs to be replaced.

[0048] The connecting shaft 4 is rotatably connected to the connecting hole 12 via a self-lubricating bushing II 11. Both ends of the self-lubricating bushing II 11 have flanges 8, with at least a portion of the flanges 8 protruding from both sides of the mounting ring 1. These flanges 8 separate the blade 6 and the mounting ring 1. The flange structure at the ends of the two self-lubricating bushings avoids direct contact between adjacent end faces of the components, preventing rust and jamming. Furthermore, because the self-lubricating material reduces friction, the transmission of each component becomes more sensitive, and the overall equipment precision is improved to a certain extent.

[0049] To ensure that the self-lubricating bushing with flange 8 is installed in the corresponding hole, the self-lubricating bushing preferably adopts a structure of two split bushings, with each split bushing having a flange 8 at the outer end of the hole.

[0050] A sleeve 10 is fitted onto the rotating shaft between the crank handle 3 and the mounting ring 1. The two ends of the sleeve 10 abut against the crank handle 3 and the mounting ring 1 respectively, creating a gap between the crank handle 3 and the rotating ring 2. Similarly, this structure also allows for a gap between the end face of the pin 5 near the mounting ring 1 and the mounting ring 1. The purpose is to prevent adjacent end faces of the components from contacting and to avoid friction.

[0051] The rotating ring 2 of this utility model has a plurality of rotating bearings 16 arranged on the circumference of the side near the mounting ring 1. The bearings 16 are connected to the rotating ring 2 by shoulder screws 17. The mounting ring 1 has an annular groove 14 on one side corresponding to the position of the bearings 16. The rotating ring 2 rotates on the fixed ring through the plurality of bearings 16 and the annular groove 14.

[0052] The annular groove 14 is a stepped groove, which includes a narrow groove near the opening of the annular groove 14 and a wide groove inside the annular groove 14. The width of the wide groove is equal to the diameter of the bearing 16, and the width of the narrow groove is less than the diameter of the bearing 16 but greater than the diameter of the shoulder screw 17. The side wall of the narrow groove is provided with an embedding groove 15 corresponding to the number and position of several bearings 16. The embedding groove 15 is connected to the wide groove, and the bearing 16 can enter the wide groove through the embedding groove 15.

[0053] A self-lubricating washer 18 is preferably fitted on the shoulder screw 17 between the bearing 16 and the rotating ring 2. The outer diameter of the self-lubricating washer 18 is larger than the width of the wide groove. The self-lubricating washer 18 is placed between the rotating ring 2 and the mounting ring 1 to separate the rotating ring 2 and the mounting ring 1. Its purpose is the same as that of the flange 8, and will not be described in detail here.

[0054] To achieve the rotation of the rotating ring 2, this invention employs the following structure: Specifically, the mounting ring 1 is further equipped with a rotating main drive shaft, the end of which is connected to an actuator that drives the main drive shaft to rotate (or one of the connecting shafts can be directly connected to the actuator that drives the main drive shaft to rotate). The actuator is preferably a linear actuator with a rocker arm. A main drive handle is fixedly connected to the main drive shaft, and a main drive pin is rotatably connected to one end of the main drive handle. A radial main drive opening groove is provided on the outer ring wall of the rotating ring 2, and the main drive pin engages in the radial main drive opening groove.

[0055] The actuator drives the main drive shaft to rotate, which in turn drives the main drive handle to swing. The main drive pin at the end of the main drive handle engages with the radial main drive slot, causing the rotating ring 2 to rotate.

[0056] The specific working principle of this utility model is as follows:

[0057] The actuator drives the rotating ring 2 to rotate through the main drive shaft, main drive handle, main drive pin and radial main drive slot. The rotating ring 2 drives all the rocker handles 3 to swing through the shaft pin 5 and radial slot 9. The rocker handles 3 drive the connecting shaft 4 to rotate. Finally, the rotating connecting shaft 4 drives all the blades 6 around the perimeter to swing synchronously, thus realizing the opening, closing and adjustment of the air intake channel between the blades 6.

[0058] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. An adjustable nozzle, characterized in that, Includes a mounting ring (1), on which a plurality of connecting holes (12) are evenly distributed around the circumference of the mounting ring (1), and a connecting shaft (4) is rotatably fitted in the connecting holes (12). One end of the connecting shaft (4) is fixedly connected to a blade (6), and the other end of the connecting shaft (4) is fixedly connected to a rocker arm (3). It also includes a rotating ring (2), the rotating ring (2) and the rocker (3) are arranged on the same side of the mounting ring (1), the rotating ring (2) is coaxially rotatably connected to the mounting ring (1), the outer ring wall of the rotating ring (2) is evenly distributed with a number of radial opening grooves (9), the end of the rocker (3) is provided with a mating hole (13), the mating hole (13) is provided with a shaft pin (5), the shaft pin (5) is rotatably connected to the mating hole (13) through a self-lubricating bushing I (7), and the end of the shaft pin (5) away from the rocker (3) is mated in the radial opening groove (9); When the rotating ring (2) rotates, the radial opening groove (9) drives the connecting shaft (4) to rotate through the shaft pin (5) and the rocker arm (3), and the rotating connecting shaft (4) drives the blade (6) to swing synchronously.

2. An adjustable nozzle according to claim 1, characterized in that, The self-lubricating bushing I (7) has flanges (8) at both ends, and at least part of the flanges (8) at both ends of the self-lubricating bushing I (7) protrude from both sides of the handle (3).

3. An adjustable nozzle according to claim 2, characterized in that, The outer diameter of the flange (8) near the rotating ring (2) is greater than the width of the radial opening groove (9).

4. An adjustable nozzle according to claim 1, characterized in that, The end of the pin (5) away from the mounting ring (1) is provided with a threaded section (51), the diameter of which is smaller than that of the pin (5). The threaded section (51) is provided with a limiting pad (53) and a nut (52). The nut (52) can position the limiting pad (53) on the step between the pin (5) and the threaded section (51). The outer diameter of the limiting pad (53) is larger than the inner diameter of the self-lubricating bushing I (7).

5. An adjustable nozzle according to claim 1, characterized in that, The connecting shaft (4) is rotatably connected to the connecting hole (12) through the self-lubricating bushing II (11); Both ends of the self-lubricating bushing II (11) have flanges (8), and at least part of the flanges (8) at both ends of the self-lubricating bushing II (11) protrude from both sides of the mounting ring (1).

6. An adjustable nozzle according to claim 1, characterized in that, A pad (10) is fitted on the shaft between the rocker (3) and the mounting ring (1), and the pad (10) creates a gap between the rocker (3) and the rotating ring (2).

7. An adjustable nozzle according to claim 1, characterized in that, A gap is provided between the end face of the pin (5) near the mounting ring (1) and the mounting ring (1).

8. An adjustable nozzle according to claim 1, characterized in that, The rotating ring (2) has several rotating bearings (16) arranged around its circumference near the mounting ring (1), and the bearings (16) are connected to the rotating ring (2) by shoulder screws (17). The mounting ring (1) has an annular groove (14) on one side corresponding to the position of the bearing (16), and the rotating ring (2) rotates on the fixed ring through several bearings (16) and the annular groove (14).

9. An adjustable nozzle according to claim 8, characterized in that, The annular groove (14) is configured as a stepped groove, which includes a narrow groove near the opening of the annular groove (14) and a wide groove located inside the annular groove (14); The width of the wide slot is equal to the diameter of the bearing (16), and the width of the narrow slot is less than the diameter of the bearing (16) but greater than the diameter of the shoulder screw (17). The narrow groove sidewall is provided with an embedding groove (15) corresponding to the number and position of a number of bearings (16). The embedding groove (15) is connected to the wide groove, and the bearings (16) can enter the wide groove through the embedding groove (15).

10. An adjustable nozzle according to claim 8, characterized in that, A self-lubricating washer (18) is fitted on the shoulder screw (17) between the bearing (16) and the rotating ring (2). The outer diameter of the self-lubricating washer (18) is greater than the width of the wide groove, and the self-lubricating washer (18) is placed between the rotating ring (2) and the mounting ring (1).

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