Hydraulic cylinder adjusting device for movable blade adjustable axial flow fan

Abstract

The invention provides a hydraulic cylinder adjusting device for an axial flow fan with adjustable moving blades, which comprises a piston shaft, a piston, a hydraulic cylinder body, a cylinder cover, an adjusting rod and a gear rack mechanism, and is characterized in that the device realizes accurate adjustment of the moving blades by utilizing a hydraulic system, and can realize adjustment of blade angles in the rotating process of a fan rotor; a more accurate and stable adjusting effect can be achieved, meanwhile, abrasion and failure rate of mechanical parts are reduced, high power density and good control performance of a hydraulic system are achieved, a hydraulic oil cylinder is connected with an adjusting rod of each moving blade on an impeller, more precise angle adjustment can be achieved, working oil pressure needed by adjustment is low, and the working efficiency is improved. The fan blade angle adjusting device is favorable for preventing leakage, prolonging the service life of equipment and improving the overall reliability of the equipment, is lower in energy consumption and high in response speed, and can accurately adjust the fan blade angle in real time, so that the fan blade angle adjusting device better adapts to the change of air flow and optimizes the performance of the fan.

Description

Technical Field

[0001] The invention relates to an axial flow fan, in particular to a hydraulic cylinder adjusting device for an axial flow fan with adjustable moving blades. Background Art

[0002] The fan with adjustable blades is a fan whose blade angle can be adjusted as needed. This fan can automatically or manually adjust the blade angle according to different working conditions to achieve the best operating efficiency. It is famous for its excellent energy-saving effect and wide application fields. It is one of the important equipment in industries such as mines, tunnels, and power plants. Traditional fans with adjustable blades usually use mechanical or electrical methods to adjust the angle of the blades, but there are limitations in terms of operation complexity, response speed, and adjustment accuracy. The adjustment of the blades requires high reliability and stability, and traditional technologies are difficult to meet these requirements. For example, mechanical adjustment may cause inaccurate adjustment due to wear, and electrical adjustment may be subject to electromagnetic interference, and maintenance and repair are also a problem. Since the blade adjustment system usually works in a harsh environment and is easily affected by factors such as dust and humidity, it is necessary to design a fan blade adjustment device to overcome the above defects. Summary of the invention

[0003] The object of the present invention is to provide a hydraulic cylinder adjusting device for an axial flow fan with adjustable moving blades, so as to facilitate the adjustment of the blades.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades, comprising:

[0006] A piston shaft having an assembly space thereon;

[0007] A piston, which is fixedly mounted on the piston shaft;

[0008] The hydraulic cylinder body surrounds the piston and the outer side of the piston shaft, one end of which is open and the other end is closed. The outer wall of the piston abuts against the inner wall of the hydraulic cylinder body, so that the hydraulic cylinder body can move axially on the piston and rotate circumferentially;

[0009] The cylinder cover is mounted on the opening of the hydraulic cylinder body through a connecting piece to close the opening. The piston shaft extends along the axial direction of the hydraulic cylinder body and the cylinder cover and penetrates through the cylinder cover and the closed part of the hydraulic cylinder body, so that the hydraulic cylinder body and the cylinder cover can rotate in the circumferential direction on the piston shaft and move in the axial direction.

[0010] Also includes:

[0011] An adjusting rod, which extends along the axial direction of the piston shaft and passes through both ends of the piston shaft, and whose outer end is engaged with the cylinder cover;

[0012] The gear rack mechanism is engaged with the inner end of the adjusting rod through a transmission structure, which can drive the adjusting rod to move axially in the piston shaft, and drive the cylinder cover and the hydraulic cylinder body to move synchronously through the adjusting rod, and the hydraulic cylinder body drives the blades to move together.

[0013] An angular displacement sensor is installed in the rack and pinion mechanism, and the angular displacement sensor senses the angular displacement information of the rack and pinion mechanism.

[0014] A linear displacement sensor is provided on the adjusting rod, and the linear displacement sensor senses the linear displacement information of the adjusting rod.

[0015] A transition end pipe is provided between the outer end of the adjusting rod and the cylinder cover. The transition end pipe is protected outside the piston shaft, one end of which is connected to the outer end of the adjusting rod through a locking nut, and the other end is connected to the cylinder cover through a locking bolt.

[0016] A limiting boss is provided on the outer wall of the piston shaft. After the piston sleeve is arranged on the outer wall of the piston shaft, one end of the piston sleeve is engaged with the limiting boss. A limiting sleeve is also sleeved on the piston shaft. The limiting sleeve is engaged with the other end of the piston and is fixedly connected to the piston shaft through a connecting piece. The position of the piston on the piston shaft is fixed by the limiting boss and the limiting sleeve.

[0017] The outer wall of the piston shaft is provided with a transfer flange, which extends along the circumference of the piston shaft and protrudes radially toward the outside of the piston shaft;

[0018] A connecting flange is sleeved on the piston shaft, the connecting flange abuts against the adapter flange, and is fixedly connected to the adapter flange through connecting bolts. The piston shaft can be fixedly installed through the connecting flange.

[0019] An oil circuit joint body is also provided on the piston shaft, which is connected to the hydraulic oil supply device through a pipeline, and is connected to the inside of the hydraulic cylinder body through an oil circuit channel opened in the piston shaft. The hydraulic oil supply device supplies hydraulic oil to the inside of the hydraulic cylinder body to adjust the position of the hydraulic cylinder body.

[0020] A sealing ring is arranged on the outer wall of the piston, which extends along the circumference of the piston, protrudes radially toward the outer wall of the piston, and abuts against the inner wall of the hydraulic cylinder body, and the sealing ring seals the contact part between the piston and the hydraulic cylinder body.

[0021] The advantages of the present invention are:

[0022] The device uses a hydraulic system to achieve precise adjustment of the moving blades. The blade angle adjustment that can be achieved during the rotation of the fan rotor can achieve a more precise and stable adjustment effect, while also reducing the wear and failure rate of mechanical parts. It has the high power density and good control performance of the hydraulic system. It is connected to the adjustment rod of each moving blade on the impeller through a hydraulic cylinder, which can achieve finer angle adjustment. The working oil pressure required for adjustment is low, which helps prevent leakage, extend the service life of the equipment, and improve the overall reliability of the equipment. It also has lower energy consumption and fast response speed. It can accurately adjust the fan blade angle in real time, so as to better adapt to changes in windflow and optimize the performance of the fan. It can be designed more accurately according to the technical parameters of the fan, so that the moving blades can better adapt to the requirements of fluid mechanics, further improving the efficiency and energy saving effect of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the longitudinal section structure of the hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades proposed by the present invention;

[0024] Figure 2 It is a cross-sectional structural diagram of a rack and pinion mechanism. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] like Figure 1 , Figure 2As shown, the hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades proposed by the present invention comprises a piston shaft 100, a piston 200, a hydraulic cylinder body 300, a cylinder head 400, an adjustment rod 500 and a gear rack mechanism 600. The piston shaft has an assembly space, the piston is fixedly mounted on the piston shaft, the hydraulic cylinder body surrounds the piston and the outer side of the piston shaft, one end of the hydraulic cylinder body is open and the other end is closed, the outer wall of the piston is in contact with the inner wall of the hydraulic cylinder body, so that the hydraulic cylinder body can move axially on the piston and rotate circumferentially, and the cylinder head is mounted on the hydraulic cylinder body through a connecting piece. The opening of the hydraulic cylinder body and the cylinder head is closed, and the piston shaft extends along the axial direction of the hydraulic cylinder body and the cylinder head and passes through the closed parts of the cylinder head and the hydraulic cylinder body, so that the hydraulic cylinder body and the cylinder head can rotate circumferentially on the piston shaft and move axially. The adjusting rod extends along the axial direction of the piston shaft and passes through both ends of the piston shaft. The outer end of the adjusting rod is engaged with the cylinder head. The gear rack mechanism is engaged with the inner end of the adjusting rod through the transmission structure, which can drive the adjusting rod to move axially in the piston shaft, and drive the cylinder head and the hydraulic cylinder body to move synchronously through the adjusting rod, and the hydraulic cylinder body drives the blades to move together.

[0027] An angular displacement sensor 610 is installed in the rack and pinion mechanism, and the angular displacement sensor senses the angular displacement information of the rack and pinion mechanism.

[0028] A linear displacement sensor 510 is provided on the adjusting rod, and the linear displacement sensor senses the linear displacement information of the adjusting rod.

[0029] An adapter end pipe 520 is provided between the outer end of the adjusting rod and the cylinder cover. The adapter end pipe covers the outside of the piston shaft, one end of which is connected to the outer end of the adjusting rod through a locking nut, and the other end is connected to the cylinder cover through a locking bolt.

[0030] A limiting boss 110 is provided on the outer wall of the piston shaft. After the piston sleeve is arranged on the outer wall of the piston shaft, one end of the piston sleeve is engaged with the limiting boss. A limiting sleeve 120 is also sleeved on the piston shaft. The limiting sleeve is engaged with the other end of the piston and is fixedly connected to the piston shaft through a connecting piece. The position of the piston on the piston shaft is fixed by the limiting boss and the limiting sleeve.

[0031] The outer wall of the piston shaft is provided with a transfer flange 130, which extends along the circumference of the piston shaft and protrudes radially toward the outside of the piston shaft;

[0032] A connecting flange 140 is sleeved on the piston shaft, and the connecting flange abuts against the adapter flange and is fixedly connected to the adapter flange via connecting bolts. The piston shaft can be fixedly installed via the connecting flange.

[0033] An oil circuit connector 150 is also provided on the piston shaft, which is connected to the hydraulic oil supply device through a pipeline, and is connected to the inside of the hydraulic cylinder body through an oil circuit channel opened in the piston shaft. The hydraulic oil supply device supplies hydraulic oil to the inside of the hydraulic cylinder body to adjust the position of the hydraulic cylinder body.

[0034] A sealing ring 210 is provided on the outer wall of the piston. The sealing ring extends along the circumference of the piston, protrudes radially toward the outer wall of the piston, and abuts against the inner wall of the hydraulic cylinder body. The sealing ring seals the contact portion between the piston and the hydraulic cylinder body.

[0035] In this embodiment, the angular displacement sensor and the linear displacement sensor are electrically connected to the control head through lines respectively, and the control head can perform closed-loop control on the adjustment process of the hydraulic cylinder according to the angular displacement information and the linear displacement information.

[0036] In the description of the present invention, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades, comprising: A piston shaft having an assembly space thereon; A piston, which is fixedly mounted on the piston shaft; The hydraulic cylinder body surrounds the piston and the outer side of the piston shaft, one end of which is open and the other end is closed. The outer wall of the piston abuts against the inner wall of the hydraulic cylinder body, so that the hydraulic cylinder body can move axially on the piston and rotate circumferentially; The cylinder cover is mounted on the opening of the hydraulic cylinder body through a connecting piece to close the opening. The piston shaft extends along the axial direction of the hydraulic cylinder body and the cylinder cover and penetrates through the cylinder cover and the closed part of the hydraulic cylinder body, so that the hydraulic cylinder body and the cylinder cover can rotate in the circumferential direction on the piston shaft and move in the axial direction. It is characterized by further comprising: An adjusting rod, which extends along the axial direction of the piston shaft and passes through both ends of the piston shaft, and whose outer end is engaged with the cylinder cover; The gear rack mechanism is engaged with the inner end of the adjusting rod through a transmission structure, which can drive the adjusting rod to move axially in the piston shaft, and drive the cylinder cover and the hydraulic cylinder body to move synchronously through the adjusting rod, and the hydraulic cylinder body drives the blades to move together.

2. A hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: An angular displacement sensor is installed in the rack and pinion mechanism, and the angular displacement sensor senses the angular displacement information of the rack and pinion mechanism.

3. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: A linear displacement sensor is provided on the adjusting rod, and the linear displacement sensor senses the linear displacement information of the adjusting rod.

4. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: A transition end pipe is provided between the outer end of the adjusting rod and the cylinder cover. The transition end pipe is protected outside the piston shaft, one end of which is connected to the outer end of the adjusting rod through a locking nut, and the other end is connected to the cylinder cover through a locking bolt.

5. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: A limiting boss is provided on the outer wall of the piston shaft. After the piston sleeve is arranged on the outer wall of the piston shaft, one end of the piston sleeve is engaged with the limiting boss. A limiting sleeve is also sleeved on the piston shaft. The limiting sleeve is engaged with the other end of the piston and is fixedly connected to the piston shaft through a connecting piece. The position of the piston on the piston shaft is fixed by the limiting boss and the limiting sleeve.

6. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: The outer wall of the piston shaft is provided with a transfer flange, which extends along the circumference of the piston shaft and protrudes radially toward the outside of the piston shaft; A connecting flange is sleeved on the piston shaft, the connecting flange abuts against the adapter flange, and is fixedly connected to the adapter flange through connecting bolts. The piston shaft can be fixedly installed through the connecting flange.

7. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: An oil circuit joint body is also provided on the piston shaft, which is connected to the hydraulic oil supply device through a pipeline, and is connected to the inside of the hydraulic cylinder body through an oil circuit channel opened in the piston shaft. The hydraulic oil supply device supplies hydraulic oil to the inside of the hydraulic cylinder body to adjust the position of the hydraulic cylinder body.

8. The hydraulic cylinder adjustment device for an axial flow fan with adjustable moving blades according to claim 1, characterized in that: A sealing ring is arranged on the outer wall of the piston, which extends along the circumference of the piston, protrudes radially toward the outer wall of the piston, and abuts against the inner wall of the hydraulic cylinder body, and the sealing ring seals the contact part between the piston and the hydraulic cylinder body.

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