Gear-linked axial flow pump blade adjusting device

Abstract

The utility model discloses a gear-linked axial flow pump blade adjusting device, which is characterized in that blades are radially arranged outside a hub body, an operating rod is axially arranged in the hub body along the hub body, a driving gear is sleeved on the operating rod, and a driven gear is sleeved on a rotating shaft of each blade, so that the blades can be driven by the driving gear and the driven gear; each driven gear is meshed with the driving gear, so that the operating rod, the driving gear and the driven gear assembly are linked to form a blade adjusting mechanism of the axial flow pump, the driving gear can be driven to rotate on a first plane by rotating the operating rod, and the rotation of the driving gear can drive all the driven gears to synchronously rotate on a second plane; therefore, all the blades are driven to rotate synchronously, the angles of all the blades are adjusted synchronously, the adjusting angles of all the blades are kept consistent, meanwhile, the adjusting angles of all the blades can be accurately controlled by controlling the rotating angle of the operating rod, and accurate control over the lift of the axial flow pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow pumps, in particular to a blade regulating device for an axial flow pump. Background Art

[0002] Axial flow pumps have the characteristics of large flow and high head, and are often used in industries such as irrigation. Axial flow pumps adjust the pump head and working conditions by adjusting the installation angle of the impeller blades. Existing axial flow pumps are divided into semi-adjustable and fully adjustable types according to the way the blades are adjusted. Semi-adjustable axial flow pumps fix the impeller blades on the hub. When adjusting, the impeller is first removed from the hub and then reinstalled according to the required angle. Fully adjustable axial flow pumps usually change the installation angle of the blades through a set of mechanical or hydraulic adjustment mechanisms, and the adjustment is relatively simple and convenient.

[0003] However, the semi-adjustable axial flow pump needs to be shut down and the impeller removed before it can be adjusted. It has a complex structure and cumbersome adjustment. In the fully adjustable axial flow pump, each blade has its inclination angle adjusted individually. The blade angle adjustment is not precise enough to ensure that the angles of all blades are uniform.

[0004] Therefore, how to effectively and accurately control the adjustment angles of all impeller blades in an axial flow pump so that the adjustment angles of all blades are consistent and improve the precise control of the axial flow pump head has become an urgent problem to be solved in this field. Utility Model Content

[0005] In view of the defects of the prior art, the purpose of the utility model is to provide a gear-linked axial flow pump blade adjustment device capable of controlling all impeller blades to have a consistent adjustment angle.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a gear-linked axial flow pump blade adjustment device, which is used to cooperate with an axial flow pump, wherein the axial flow pump includes a guide cover,

[0007] A hub body connected to the fairing,

[0008] blades, wherein the rotation axis of the blades passes through the hub body, so that the blades are arranged outside the hub body in the radial direction of the hub body,

[0009] Also includes

[0010] An operating rod, one end of which is arranged in the wheel hub body along the axial direction of the wheel hub body, and the other end of which is formed with an operating end portion outside the wheel hub body,

[0011] A driving gear, the driving gear is arranged in the hub body and sleeved on the operating rod,

[0012] A driven gear assembly is arranged in the hub body, and a driven gear is sleeved on the rotating shaft of each blade, and each driven gear is meshed and connected with the driving gear.

[0013] Furthermore, all the driven gears of the driven gear assembly are evenly distributed around the driving gear and are perpendicular to the driving gear, and each driven gear is meshed with the driving gear.

[0014] Furthermore, the driving gear is arranged on the operating rod through a first flat key.

[0015] Furthermore, each of the driven gears is arranged on a rotating shaft corresponding to each blade through a second flat key.

[0016] Furthermore, an O-ring is provided at the connection between the operating rod and the hub body.

[0017] Furthermore, the number of teeth of the driving gear and the number of teeth of the driven gear are prime numbers to each other.

[0018] Furthermore, the driving gear and the driven gear assembly are both composed of spur bevel gears.

[0019] The utility model provides a gear-linked axial flow pump blade adjustment device, in which the blades are radially arranged outside the hub body, an operating rod is axially arranged in the hub body along the hub body, a driving gear is sleeved on the operating rod, and a driven gear is sleeved on the rotating shaft of each blade, so that each driven gear is meshed and connected with the driving gear, so that the operating rod, the driving gear and the driven gear assembly are linked to form a blade adjustment mechanism of the axial flow pump, and the driving gear can be driven to rotate on a first plane by rotating the operating rod, and the rotation of the driving gear can drive all the driven gears to rotate synchronously on a second plane, thereby driving all the blades to rotate synchronously, and adjusting the angles of all the blades synchronously, so that the adjustment angles of all the blades are kept consistent, and at the same time, the adjustment angles of all the blades can be accurately controlled by controlling the rotation angle of the operating rod, so as to improve the precise control of the head of the axial flow pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0021] Figure 1 A cross-sectional view of the gear-linked axial flow pump blade adjustment device provided by the utility model;

[0022] Figure 2 The overall structural cross-sectional view of the gear-linked axial flow pump blade adjustment device provided by the utility model;

[0023] Figure 3The overall structural exploded view of the gear-linked axial flow pump blade adjustment device provided by the utility model;

[0024] Figure 4 It is a schematic diagram of the connection structure between the driven gear and the blade in the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure between the driving gear and a driven gear in the present invention;

[0026] Figure 6 and Figure 7 It is a schematic diagram of the connection structure of the driving gear and the driven gear assembly in the present invention.

[0027] Reference numerals:

[0028] 1. Hub body; 11. Pressure ring; 12. O-ring; 13. Sealing gasket;

[0029] 2. Fairing cover;

[0030] 3. Blade; 31. First blade; 32. Second blade; 33. Third blade; 34. Rotation axis;

[0031] 4. Driving gear; 41. First flat key;

[0032] 5. Driven gear assembly; 51. Driven gear; 511. First driven gear; 512. Second driven gear; 513. Third driven gear; 52. Second flat key; 53. Second fixing nut;

[0033] 6. Operating rod; 61. First end; 62. Second end; 63. First fixing nut. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0035] See also Figures 1 to 3 , which shows an example of the gear-linked axial flow pump blade adjustment device provided by the utility model.

[0036] As can be seen from the figure, the gear-linked axial flow pump blade adjustment device of this example is used to cooperate with the axial flow pump, and mainly includes a hub body 1, a guide cover 2, blades 3, a driving gear 4, a driven gear assembly 5 and an operating rod 6.

[0037] The hub body 1 is connected to the air guide cover 2, and the rotating shaft 34 of the blade 3 passes through the hub body 1, so that the blade 3 is arranged outside the hub body 1 along the radial direction of the hub body 2, one end of the operating rod 6 is arranged in the hub body 1 along the axial direction of the hub body 1, and the other end is formed with an operating end outside the hub body 1, the driving gear 4 is arranged in the hub body 1, and is sleeved on the operating rod 6, so that the rotation of the operating rod 6 can drive the driving gear 4 to rotate on the first plane, and the driven gear assembly 5 is arranged in the hub body 1, and a driven gear 51 is sleeved on the rotating shaft 34 of each blade 3, and each driven gear 51 is meshed with the driving gear 4, so that the rotation of the driving gear 4 can drive each driven gear 51 to rotate synchronously on the second plane, thereby driving the rotating shafts 34 of all blades 3 to rotate synchronously, and synchronously adjusting the angles of all blades 3.

[0038] Specifically, the first end 61 of the operating rod 6 is arranged in the hub body 1 along the axial direction of the hub body 1 , and the second end 62 is formed with an operating end portion outside the hub body 1 , so that the operating rod 6 can be driven to rotate as a whole by rotating the second end 62 .

[0039] Here, the driving source of the operating rod 6 is not limited, and for example, hydraulic drive, electric motor drive or manual drive may be adopted.

[0040] Furthermore, the driving gear 4 is arranged in the hub body 1, and the driving gear 4 is connected to the operating rod 6 by cooperating with the driving gear 4 through the first flat key 41. Preferably, the driving gear 4 is arranged in the first end 61 area of ​​the operating rod 6, so that a first fixing nut 63 is provided on the first end 61 of the operating rod 6, which can tighten the driving gear 4 so that the operating rod 6 can stably drive the driving gear 4 to rotate.

[0041] In coordination therewith, the driven gear assembly 5 includes a plurality of driven gears 51, the number of which is consistent with the number of blades 3, so that a driven gear 51 is provided on the rotating shaft 34 of each blade 3, and each driven gear 51 is meshedly connected with the driving gear 4, so that the rotation of the driving gear 4 can drive all the driven gears 51 to rotate synchronously.

[0042] Specifically, combined Figure 4 The driven gear 51 is sleeved on the rotating shaft 34 of the blade 3 through the second flat key 52, and a second fixing nut 53 is provided at the end of the rotating shaft 34 to press the driven gear 51, thereby fixing the driven gear 51, the blade 3 and the hub body 1 in connection, so that the rotation of the driven gear 51 can drive the rotating shaft 34 to rotate, thereby driving the blade 3 to rotate outside the hub body 1 to adjust the angle.

[0043] Further, see Figure 5Since the operating rod 6 is axially matched with the hub body 1, and the blade 3 is radially matched with the hub body 1, the driving gear 4 and the driven gear 51 are vertically distributed and meshed on the first plane and the second plane respectively, so that when the driving gear 4 rotates on the first plane, it can drive the driven gear 51 to rotate on the second plane.

[0044] Therefore, each blade 3 cooperates with a driven gear 51, all driven gears 51 are evenly distributed around the driving gear 4 and perpendicular to the driving gear, and each driven gear 51 is meshed and connected with the driving gear 4, so that the driving gear 4 can drive all driven gears 51 to rotate synchronously, so that the driven gear assembly 5 can drive all blades 3 to adjust their angles synchronously.

[0045] In order to illustrate the specific structure of the present solution, the axial flow pump of this embodiment is provided with three blades 3 as an example. In some embodiments, the number of blades in the axial flow pump can be set according to specific circumstances.

[0046] Combination Figure 2 and Figure 3 In this example, the first blade 31, the second blade 32 and the third blade 33 pass through the hub body 1 through the corresponding rotating shaft 34, and are evenly arranged outside the hub body 1 along the radial direction of the hub body 1. The first blade 31, the second blade 32 and the third blade 33 are respectively provided with a first driven gear 511, a second driven gear 512 and a third driven gear 513 with the same structure on the rotating shaft 34 corresponding to the first blade 31, the second blade 32 and the third blade 33, and the first driven gear 511, the second driven gear 512 and the third driven gear 513 are evenly distributed on the second plane around the driving gear 4, and are perpendicular to the driving gear 4, and are respectively meshed with the driving gear 4, as shown in FIG. Figure 6 and Figure 7 .

[0047] Furthermore, the driving gear 4 is arranged on the first plane along the axial direction of the hub body 1, and the driving gear 4 is meshed and connected with one end of the first driven gear 511, the second driven gear 512 and the third driven gear 513 respectively, so that when the operating rod 6 drives the driving gear 4 to rotate on the first plane, the driving gear 4 can synchronously drive the first driven gear 511, the second driven gear 512 and the third driven gear 513 to rotate synchronously on the second plane, thereby driving the rotating shafts 34 corresponding to the first blade 31, the second blade 32 and the third blade 33 to rotate synchronously, so that all blades 3 can adjust their angles synchronously.

[0048] At the same time, the driving gear 4 rotates to drive all the driven gears 51 to rotate synchronously at a consistent angle, so that the rotating shafts 34 of all the blades 3 rotate synchronously at the same angle, thereby ensuring that the adjustment angles of all the blades 3 are consistent, and by controlling the rotation angle of the operating lever 6, the adjustment angle value of the blade 3 can be controlled to ensure the angle adjustment accuracy of all the blades 3.

[0049] Furthermore, all driven gears 51 in the driven gear assembly 5 have the same structure, the number of teeth of the driven gear 51 is preferably set to 17 to 20, and the tooth width coefficient of the driving gear 4 is preferably 0.3, so as to improve the load-bearing capacity and connection stability of the driven gear assembly 5 and the driving gear 4.

[0050] Preferably, the number of teeth of the driven gear 51 and the driving gear 4 are prime numbers to each other, so as to ensure that when each driven gear 51 is meshed with the driving gear 4, each tooth of each driven gear 51 can respectively contact multiple teeth of the driving gear 4, so that the driven gear 51 and the driving gear 4 are meshed evenly, thereby making the linkage between the driving gear 4 and the driven gear assembly 5 smooth, and ensuring the stable adjustment of all blades 3.

[0051] Furthermore, the driving gear 4 and the driven gear assembly 5 are preferably both composed of spur bevel gears, so that the driving gear 4 and the driven gear assembly 5 can provide stable transmission during the linkage process and reduce the possibility of tooth jumping or tooth slipping. At the same time, due to the gear structure of the spur bevel gears, the driving gear 4 and the driven gear assembly 5 can easily change the transmission direction, making the angle adjustment of the blade 3 more flexible.

[0052] In order to ensure that the driving gear 4 and the driven gear assembly 5 maintain stable linkage in the working environment of the axial flow pump, a pressure ring 11 is provided at the joint between the hub body 1 and the blade 3, and an O-ring 12 is provided between the pressure ring 11 and the hub body 1. At the same time, an O-ring 12 is also provided at the connection between the operating rod 6 and the hub body 1. Furthermore, a sealing gasket 13 is provided at the connection between the air guide cover 2 and the hub body 1 to seal the hub body 1 as a whole, so that a sealed environment is formed inside the hub body 1, ensuring that the driving gear 4 and the driven gear assembly 5 are in a water-free working environment, thereby improving the linkage stability of the driving gear 4 and the driven gear assembly 5.

[0053] Furthermore, a grease layer is provided on the tooth surfaces of the driving gear 4 and the driven gear assembly 5 to increase the service life of the driving gear 4 and the driven gear assembly 5 .

[0054] The gear-linked axial flow pump blade adjustment device provided by the utility model adopts the cooperation of the driving gear 4, the driven gear assembly 5 and the operating rod 6 to realize the synchronous adjustment of the angles of all the blades 3. At the same time, by controlling the rotation angle of the operating rod 6, the adjustment angle values ​​of all the blades 3 can be controlled, thereby ensuring the adjustment accuracy.

[0055] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A gear-linked axial flow pump blade adjustment device, used to cooperate with an axial flow pump, the axial flow pump comprising a guide cover, A hub body connected to the fairing, blades, wherein the rotation axis of the blades passes through the hub body, so that the blades are arranged outside the hub body in the radial direction of the hub body, It is characterized in that Also includes An operating rod, one end of which is arranged in the wheel hub body along the axial direction of the wheel hub body, and the other end of which is formed with an operating end portion outside the wheel hub body, A driving gear, the driving gear is arranged in the hub body and sleeved on the operating rod, A driven gear assembly is arranged in the hub body, and a driven gear is sleeved on the rotating shaft of each blade, and each driven gear is meshed and connected with the driving gear.

2. The gear-linked axial flow pump blade adjustment device according to claim 1, characterized in that: All the driven gears of the driven gear assembly are evenly distributed around the driving gear and are perpendicular to the driving gear, and each driven gear is meshed with the driving gear.

3. The gear-linked axial flow pump blade adjustment device according to claim 2, characterized in that: The driving gear is arranged on the operating rod through a first flat key.

4. The gear-linked axial flow pump blade adjustment device according to claim 2, characterized in that: Each of the driven gears is arranged on a rotating shaft corresponding to each blade through a second flat key.

5. The gear-linked axial flow pump blade adjustment device according to claim 1, characterized in that: An O-ring is provided at the connection between the operating rod and the hub body.

6. The gear-linked axial flow pump blade adjustment device according to claim 2, characterized in that: The number of teeth of the driving gear and the number of teeth of the driven gear are prime numbers to each other.

7. The gear-linked axial flow pump blade adjustment device according to claim 1, characterized in that: The driving gear and the driven gear assembly are both composed of spur bevel gears.

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