Adjustable nozzle

Abstract

The utility model discloses an adjustable nozzle, which belongs to the technical field of inlet adjustable nozzles and comprises a fixing ring, a pushing ring is rotatably connected onto the fixing ring, and a plurality of tooth grooves are uniformly distributed on the circumference of the outer side wall of the pushing ring. A plurality of transmission parts are uniformly distributed on the circumference of one side of the fixing ring, convex teeth are arranged on each transmission part and meshed with the corresponding tooth grooves, blades are arranged on the other side of the fixing ring, and the blades and the transmission parts synchronously rotate through rotating shafts; a main driving tooth groove is formed in the outer side wall of the pushing ring, a main driving piece is arranged on the fixing ring, main driving teeth meshed with the main driving tooth groove are arranged on the main driving piece, the main driving piece is connected with a transmission shaft, or one transmission piece is connected with the transmission shaft; and the transmission shaft is connected with an actuator for driving the transmission shaft to rotate. According to the structure, precise flow control can be achieved through cooperation of the involute gears, the structure is simple, and reliability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inlet adjustable nozzle, concretely relates to an adjustable nozzle. BACKGROUND

[0002] The nozzle is an important functional component, and adjusts the gas passing amount so that the equipment runs on the design performance curve.

[0003] However, the working condition at the nozzle is relatively poor, and the transmission joint is prone to rust and rusting during operation; at the same time, the nozzle needs to be adjusted and controlled in real time according to the working condition, and the flow needs to be accurately controlled, which all puts high requirements on the structure of the nozzle.

[0004] In view of the above problems, the utility model designs and manufactures an adjustable nozzle to overcome the above defects. UTILITY MODEL CONTENTS

[0005] For the problems existing in the prior art, the adjustable nozzle provided by the utility model can realize accurate control of flow by using involute gear cooperation, and has simple structure and high reliability.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: an adjustable nozzle, comprising a fixed ring, a push ring is rotatably connected to the fixed ring, a plurality of tooth grooves are uniformly distributed on the outer side wall of the push ring;

[0007] A plurality of transmission members are uniformly distributed on one side of the circumference of the fixed ring, a protruding tooth is arranged on each transmission member and meshes with the corresponding tooth groove, and a vane is arranged on the other side of the fixed ring; the vane rotates synchronously with the transmission member through a rotating shaft;

[0008] A main drive tooth groove is arranged on the outer side wall of the push ring, a main drive member is arranged on the fixed ring, a main drive tooth which meshes with the main drive tooth groove is arranged on the main drive member, and the main drive member is connected with a transmission shaft, or one transmission member is connected with a transmission shaft;

[0009] The transmission shaft is connected with an actuator which drives the transmission shaft to rotate.

[0010] Preferably, a plurality of rotating bearings are arranged on the side of the circumference of the fixed ring close to the push ring, and the bearings are connected to the fixed ring through shaft shoulder screws;

[0011] A ring groove corresponding to the position of the bearing is arranged on one side of the fixed ring, and the push ring rotates on the fixed ring through the bearings and the ring groove.

[0012] Preferably, the ring groove is a stepped groove, and the stepped groove comprises a narrow groove close to the ring groove opening and a wide groove located in the ring groove;

[0013] 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 and greater than the diameter of the shoulder screw;

[0014] The narrow slot side wall is provided with an embedding slot corresponding to the number and position of the bearing, the embedding slot is communicated with the wide slot, and the bearing can enter the wide slot through the embedding slot.

[0015] Preferably, the main driving tooth slot is located between two adjacent tooth slots.

[0016] Preferably, the convex tooth on the transmission member and the tooth slot are involute structures.

[0017] And / or, the main driving tooth on the main driving member and the main driving tooth slot are involute structures.

[0018] Preferably, the rotating shaft penetrates the fixing ring, and a self-lubricating bearing is arranged between the rotating shaft and the fixing ring.

[0019] Preferably, a self-lubricating gasket is arranged between the blade and the fixing ring, and a self-lubricating gasket is also arranged between the transmission member and the fixing ring.

[0020] Preferably, self-lubricating sleeves are arranged at both ends of the rotating shaft, self-lubricating bosses are arranged at the outer ends of the self-lubricating sleeves, the self-lubricating boss of the self-lubricating sleeve close to the blade is located between the blade and the fixing ring, and the self-lubricating boss of the self-lubricating sleeve close to the transmission member is located between the transmission member and the fixing ring.

[0021] Preferably, the blade and the rotating shaft are connected through a saddle screw.

[0022] Preferably, the blade comprises a rotating part and a swinging part, the swinging part is arranged on one side of the rotating part, the swinging part has a sharp head and a transition structure, and the sharp head is integrally connected with the rotating part through the transition structure.

[0023] And / or, the number of blades is 18-36.

[0024] The utility model discloses the beneficial effect lies in:

[0025] 1. The utility model discloses the transmission member whole is located in the push ring outside, thus making the fixing ring whole close to the outside, the connection with the expansion machine other structure is facilitated, and the opening and closing action of the blade on the fixing ring is also guaranteed by using the inside push ring of transmission member.

[0026] 2. The utility model discloses the bearing of using circumferential setting on the push ring and the ring groove on the fixing ring cooperation, realize the relative rotation of the fixing ring and push ring, and the axial movement of push ring is limited by using the step groove structure and bearing cooperation, guarantee the stability of the relative rotation of fixing ring and push ring, in addition, the embedding slot on the step groove is used to guarantee that the bearing can enter the wide slot.

[0027] 3. The convex tooth on the transmission part and the tooth groove are involute structure, the main driving tooth on the main driving part and the main driving tooth groove are also involute structure, which ensures the transmission stability of the blade in the swing process, realizes stepless adjustment, has high adjustment precision and use reliability, and has simple structure and convenient maintenance.

[0028] 4. The rotation shaft and the fixed ring are connected through the self-lubricating bearing, the rusting and jamming phenomenon between the two is avoided, and in addition, the relative movement between the blade and the fixed ring and between the transmission part and the fixed ring is smoother through the self-lubricating gasket, and the jamming caused by thermal expansion and rusting is prevented.

[0029] 5. The blade and the rotation shaft are connected through the riding seam screw, which not only prevents the blade from being axially separated from the rotation shaft and ensures normal torque transmission, but also differs from the traditional key groove connection, ensures the precision and reduces the finishing fitting surface. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a rear view of an adjustable nozzle;

[0031] Figure 2 It is an A-A sectional view of an adjustable nozzle;

[0032] Figure 3 It is an enlarged schematic view of I of an adjustable nozzle;

[0033] Figure 4 It is an enlarged schematic view of II of an adjustable nozzle;

[0034] Figure 5 It is an enlarged schematic view of III of an adjustable nozzle;

[0035] Figure 6 It is a front view of the structure on the push ring of the utility model;

[0036] Figure 7 It is a side view of the structure on the push ring of the utility model;

[0037] Figure 8 It is an enlarged schematic view of IV of the utility model;

[0038] Figure 9 It is a rear view of the utility model after removing the push ring;

[0039] Figure 10 It is an enlarged schematic view of V of the utility model;

[0040] Figure 11 It is a front view of the utility model;

[0041] Figure 12The enlarged schematic view of VI in the utility model.

[0042] In the figure: 1-fixed ring, 2-push ring, 3-transmission part, 4-rotating shaft, 5-blade, 6-main drive part, 7-transmission shaft, 8-actuator, 9-self-lubricating sleeve, 10-self-lubricating boss, 11-ring groove, 12-embedded groove, 21-tooth groove, 22-main drive tooth groove, 23-bearing, 24-shoulder screw, 25-washer, 31-protruding tooth, 41-rider screw, 51-sharp head, 52-transition structure, 53-swinging part, 71-main drive tooth. DETAILED DESCRIPTION

[0043] In order to facilitate those skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0044] As Figures 1 to 12 shown, an adjustable nozzle includes a fixed ring 1, the fixed ring 1 is rotationally connected with a push ring 2, the outer side wall of the push ring 2 is circumferentially distributed with a plurality of tooth grooves 21, and the tooth groove 21 is a involute structure.

[0045] The fixed ring 1 side is circumferentially distributed with a plurality of transmission parts 3, each transmission part 3 is provided with a protruding tooth 31 and is engaged with the corresponding tooth groove 21, the other side of the fixed ring 1 is provided with a blade 5, the blade 5 is synchronously rotated with the transmission part 3 through a rotating shaft 4, when the push ring 2 is rotated, the transmission part 3 can be swung through the tooth groove 21 and the protruding tooth 31 on the outer side wall, in turn, the blade 5 is swung, finally, the opening and closing of the air inlet passage between the blade 5 are realized.

[0046] The utility model because transmission part 3 whole is located in push ring 2 outside, thus make the fixed ring 1 whole close to outside, it is convenient to connect with the other structure of expander, and utilize transmission part 3 inside push ring 2 also ensure the opening and closing action of blade 5 on the fixed ring 1.

[0047] In order to realize the rotation of the push ring 2, the utility model realizes through the following structure, specifically, the outer side wall of the push ring 2 is provided with a main drive tooth groove 22, the main drive tooth groove 22 is a involute structure, the main drive tooth groove 22 is located between the adjacent two tooth grooves 21, the fixed ring 1 is provided with a main drive part 6, the main drive part 6 is provided with the main drive tooth 71 engaged with the main drive tooth groove 22, the main drive part 6 is connected with a transmission shaft 7, the transmission shaft 7 is connected with the actuator 8 of driving the transmission shaft 7 rotation, the actuator 8 is preferably a linear actuator 8 with a rocker, the transmission shaft 7 is driven to rotate by the actuator 8, the main drive part 6 is driven to rotate by the transmission shaft 7, the main drive tooth 71 on the main drive part 6 is engaged with the main drive tooth groove 22 and drives the push ring 2 to rotate on the fixed ring 1.

[0048] The transmission member 3 can also be directly connected with the transmission shaft 7, the transmission shaft 7 is driven by the actuator 8 to directly drive the transmission member 3 to rotate, the convex teeth 31 on the transmission member 3 are engaged with the tooth grooves 21 to drive the pushing ring 2 to rotate on the fixed ring 1, and the requirements are also met.

[0049] The convex teeth 31 on the transmission member 3 and the tooth grooves 21 are involute structures, and / or the main driving teeth 71 on the main driving member 6 and the main driving tooth grooves 22 are involute structures. The transmission stability of the blade 5 in the swinging process can be ensured, stepless adjustment is realized, the adjustment accuracy and use reliability are high, the structure is simple, and maintenance is convenient.

[0050] In order to ensure that the pushing ring 2 can rotate on the fixed ring 1, a plurality of rotating bearings 23 are arranged on the circumference of the side of the pushing ring 2 close to the fixed ring 1, the bearings 23 are connected to the fixed ring 1 through shaft shoulder screws 24, a gasket 25 is preferably arranged between the bearings 23 and the fixed ring 1, the gasket 25 is sleeved on the shaft shoulder screw 24, a ring groove 11 corresponding to the position of the bearing 23 is arranged on one side of the fixed ring 1, and the pushing ring 2 rotates on the fixed ring 1 through the bearings 23 and the ring groove 11.

[0051] The ring groove 11 is a stepped groove, the stepped groove comprises a narrow groove close to the mouth of the ring groove 11 and a wide groove located in the ring groove 11, the width of the wide groove is equal to the diameter of the bearing 23, the width of the narrow groove is smaller than the diameter of the bearing 23 and greater than the diameter of the shaft shoulder screw 24, and the bearing 23 is located in the wide groove. The axial movement of the pushing ring 2 can be limited through the narrow groove.

[0052] The side wall of the narrow groove is provided with embedding grooves 12 corresponding to the number and position of the bearings 23, the embedding grooves 12 are communicated with the wide groove, and the bearing 23 can enter the wide groove through the embedding groove 12.

[0053] The shaft 4 penetrates the fixed ring 1, and a self-lubricating bearing 23 is arranged between the shaft 4 and the fixed ring 1, so that the rusting and jamming phenomenon between the two is avoided. A self-lubricating gasket is preferably arranged between the blade 5 and the fixed ring 1, and a self-lubricating gasket is also arranged between the transmission member 3 and the fixed ring 1. On the one hand, the self-lubricating gasket can form a gap between the two adjacent parts, reduce the contact area between the two adjacent parts, prevent the jamming caused by thermal expansion and rusting, and on the other hand, the relative movement between the blade 5 and the fixed ring 1 and between the transmission member 3 and the fixed ring 1 can be smoother. The above effects can also be achieved through other ways.

[0054] For example, the self-lubricating sleeve 9 is arranged at both ends of the rotating shaft 4, the self-lubricating sleeve 9 is provided with a self-lubricating boss 10 at the outer end, the self-lubricating boss 10 of the self-lubricating sleeve 9 close to the one end of the blade 5 is located between the blade 5 and the fixed ring 1, and the self-lubricating boss 10 of the self-lubricating sleeve 9 close to the one end of the transmission member 3 is located between the transmission member 3 and the fixed ring 1. The self-lubricating sleeve 9 is used to solve the lubrication between the rotating shaft 4 and the fixed ring 1 and the lubrication between the two parts that are attached to each other. The structure of the self-lubricating sleeve 9 can also be applied to both ends of the transmission shaft 7, and details are not described here.

[0055] The blade 5 and the rotating shaft 4 are preferably connected through the riding seam screw 41, which not only prevents the blade 5 from being axially separated from the rotating shaft 4 and ensures normal torque transmission, but also differs from the traditional key groove connection, which ensures the precision while reducing the finishing fitting surface.

[0056] The blade 5 specifically includes a rotating part and a swing part 53, the swing part 53 is arranged on one side of the rotating part, the swing part 53 has a sharp head 51 and a transition structure 52, the sharp head 51 is integrally connected with the rotating part through the transition structure 52, when the opening and closing degree between the blades 5 decreases, the sharp head 51 of the blade 5 approaches the rotating part of the other blade 5 until abutting; when the opening and closing degree between the blades 5 increases, the sharp head 51 gradually moves away.

[0057] The number of the blades 5 is preferably 18-36, and further preferably 20, which ensures the fine adjustment and has certain economy.

[0058] The specific working principle of the utility model is as follows:

[0059] The linear actuator 8 with a rocker arm drives the transmission shaft 7 to rotate, the transmission shaft 7 drives the main driving member 6 to rotate, the main driving teeth 71 on the main driving member 6 are engaged with the main driving tooth grooves 22 to drive the pushing ring 2 to rotate on the fixed ring 1, in the process of rotation, the bearing 23 on the pushing ring 2 is matched with the ring groove 11 on the fixed ring 1, and the step groove structure is matched with the bearing 23 to limit the axial movement of the pushing ring 2;

[0060] The rotation of the pushing ring 2 drives the transmission member 3 to swing through the tooth groove 21 and the convex tooth 31 on the outer side wall, and further drives the blade 5 to swing, so as to finally realize the opening and closing between the blades 5.

[0061] It should be understood that the use of these embodiments is only for the purpose of illustrating the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various modifications, modifications and / or variations to the utility model, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. An adjustable nozzle characterized by, The application relates to a fixed ring (1) which is rotatably connected with a pushing ring (2), and the outer wall of the pushing ring (2) is circumferentially provided with a plurality of tooth grooves (21). The fixed ring (1) is circumferentially provided with a plurality of transmission members (3) on one side, each of the transmission members (3) is provided with a convex tooth (31) and is engaged with a corresponding tooth groove (21), the other side of the fixed ring (1) is provided with a vane (5), and the vane (5) is synchronously rotated with the transmission member (3) through a rotating shaft (4). The outer wall of the pushing ring (2) is provided with a main driving tooth groove (22), the fixed ring (1) is provided with a main driving member (6), the main driving member (6) is provided with a main driving tooth (71) which is engaged with the main driving tooth groove (22), and the main driving member (6) is connected with a transmission shaft (7), or one of the transmission members (3) is connected with the transmission shaft (7). The transmission shaft (7) is connected with an executor (8) which drives the transmission shaft (7) to rotate.

2. An adjustable nozzle according to claim 1, wherein The pushing ring (2) is circumferentially provided with a plurality of rotating bearings (23) which are close to the fixed ring (1) on one side, and the bearings (23) are connected to the fixed ring (1) through shaft shoulder screws (24). The fixed ring (1) is provided with ring grooves (11) which are corresponded to the positions of the bearings (23) on one side, and the pushing ring (2) is rotatable on the fixed ring (1) through the bearings (23) and the ring grooves (11).

3. An adjustable nozzle according to claim 2, wherein, The ring groove (11) is a stepped groove which comprises a narrow groove close to the mouth of the ring groove (11) and a wide groove in the ring groove (11). The width of the wide groove is equal to the diameter of the bearing (23), and the width of the narrow groove is smaller than the diameter of the bearing (23) and larger than the diameter of the shaft shoulder screw (24). The side wall of the narrow groove is provided with embedding grooves (12) which are corresponded to the number and positions of the bearings (23), the embedding grooves (12) are communicated with the wide groove, and the bearing (23) can enter the wide groove through the embedding groove (12).

4. An adjustable nozzle according to claim 1, wherein The main driving tooth groove (22) is located between two adjacent tooth grooves (21).

5. An adjustable nozzle according to claim 1, wherein The convex tooth (31) on the transmission member (3) and the tooth groove (21) are in a involute structure. The main driving tooth (71) on the main driving member (6) and the main driving tooth groove (22) are in an involute structure.

6. An adjustable nozzle according to claim 1, wherein The rotating shaft (4) penetrates the fixed ring (1), and a self-lubricating bearing (23) is arranged between the rotating shaft (4) and the fixed ring (1).

7. An adjustable nozzle according to claim 1 wherein, A self-lubricating gasket is arranged between the vane (5) and the fixed ring (1), and a self-lubricating gasket is also arranged between the transmission member (3) and the fixed ring (1).

8. An adjustable nozzle according to claim 1, wherein Self-lubricating sleeves (9) are arranged at both ends of the rotating shaft (4), a self-lubricating boss (10) is arranged at the outer end of the self-lubricating sleeve (9), the self-lubricating boss (10) of the self-lubricating sleeve (9) close to one end of the vane (5) is located between the vane (5) and the fixed ring (1), and the self-lubricating boss (10) of the self-lubricating sleeve (9) close to one end of the transmission member (3) is located between the transmission member (3) and the fixed ring (1).

9. An adjustable nozzle according to claim 1 wherein, The vane (5) and the rotating shaft (4) are connected through a saddle screw (41).

10. An adjustable nozzle according to claim 1, wherein The blade (5) comprises a rotating part and a swing part (53), the swing part (53) is arranged on one side of the rotating part, the swing part (53) has a sharp head (51) and a transition structure (52), the sharp head (51) is connected with the rotating part through the transition structure (52).

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