Anti-jamming fan hydraulic cylinder

Abstract

The invention discloses an anti-jamming fan hydraulic cylinder, and relates to the field of hydraulic cylinders, the anti-jamming fan hydraulic cylinder comprises an indicator board, and the indicator board is mounted on an output shaft of a motor and used for measuring the rotation angle of the output shaft of the motor. And the hydraulic cylinder and the motor operate to control the oil quantity of the oil inlet cavity and the oil outlet cavity of the hydraulic cylinder. The motor operates to control the oil quantity of the oil inlet cavity and the oil outlet cavity of the hydraulic cylinder, the output shaft of the motor rotates to drive the indicator board arranged on the output shaft of the motor to rotate, the stroke of the hydraulic cylinder can be calculated through the rotating angle of the indicator board, and the indicator board arranged outside conducts external feedback. And jamming of internal parts in operation caused by a feedback mode of communicating the inside and the outside of the hydraulic cylinder is avoided. After transformation, no rotating part of the hydraulic cylinder is exposed in the environment, so that hydraulic cylinder fault hidden dangers caused by jamming in operation due to corrosion and serious dust deposition of a feedback part of the hydraulic cylinder can be eliminated, the fault frequency of the hydraulic cylinder is reduced, and long-term safe and stable operation of the induced draft fan is ensured.

Description

Technical Field

[0001] The invention relates to the field of hydraulic cylinders, in particular to an anti-jamming hydraulic cylinder for a fan. Background Art

[0002] Under normal operation, the 3200 bearing rotates at high speed along with the fan. When the hydraulic cylinder switches, it experiences a certain amount of axial thrust in both directions. However, under normal circumstances, the hydraulic cylinder, after maintenance, has minimal internal resistance. If damaged, it is likely due to excessive external resistance, resulting in excessive axial thrust on the 3200 bearing and increased wear and damage. During operation of the first-phase induced draft fan at the Huaneng Jinggangshan Power Plant, due to the harsh operating environment, the feedback components connecting the hydraulic cylinder to the outside of the hydraulic cylinder showed signs of rust and dust accumulation, which could lead to jamming during operation. To reduce the likelihood of jamming, the following technical modifications were made to the hydraulic cylinder feedback structure. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that the feedback mode of the hydraulic cylinder communicating with the inside and outside causes the internal parts to become stuck during operation after dust accumulates.

[0004] The above technical problem is solved by the following technical solution: The present invention proposes an anti-jamming fan hydraulic cylinder, which includes a motor.

[0005] An indicator plate is mounted on the output shaft of the motor and is used to measure the rotation angle of the output shaft of the motor.

[0006] The motor controls the oil volume in the oil inlet and outlet chambers of the hydraulic cylinder.

[0007] The operation of the motor controls the oil volume in the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder. The rotation of the output shaft of the motor drives the indicator plate arranged on the output shaft of the motor to rotate. The stroke of the hydraulic cylinder can be calculated by the rotation angle of the indicator plate. The external indicator plate is used for external feedback, which avoids the jamming of the internal parts in the operation caused by the feedback mode of the internal and external communication of the hydraulic cylinder.

[0008] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention: a main shaft is provided in the hydraulic cylinder, a positioning shaft is provided in the hydraulic cylinder, and the positioning shaft fits through the main shaft, and a feedback component is provided at one end of the main shaft passing through the hydraulic cylinder.

[0009] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention: the feedback assembly includes a feedback part and a flange arranged on the feedback part; and a sealing cover is provided on the feedback part.

[0010] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention: an oil path channel for communicating with the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder respectively is provided in the main shaft, and the two oil flow channels are both connected to the feedback part.

[0011] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention, it further includes a servo, which is installed in the feedback part and communicated with two oil channels for providing feedback on the stroke in the hydraulic cylinder.

[0012] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention, it also includes a single-sided small rack, which is installed at the output end of the servo for stroke feedback.

[0013] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention: the feedback part also includes a large gear rotatably arranged in the feedback part and meshing with the single-sided small rack, and a half gear arranged on the large gear.

[0014] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention, it further includes a double-sided rack, which is slidably arranged in the feedback part and is meshed with the half gear.

[0015] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention, the indicator plate includes a meshing gear provided on the output shaft of the motor, and a scale plate provided on the meshing gear.

[0016] In a preferred embodiment of the anti-jamming fan hydraulic cylinder of the present invention: the indicator plate is engaged with the double-sided rack, and the double-sided rack and the half gear are respectively located on both sides of the double-sided rack.

[0017] The beneficial effects of the present invention are as follows: the indicator plate in the original feedback mechanism of the hydraulic cylinder is disassembled and then installed on the output shaft of the motor. The rotation of the motor output shaft drives the rotation of the indicator plate, and then the stroke of the hydraulic cylinder is calculated by the rotation angle of the scale plate on the indicator plate. At the same time, the existing parts can be disassembled and utilized, avoiding the redesign and manufacture of parts, and avoiding the original feedback through transmission cooperation between multiple parts. Feedback caused by the breakage of any part and the unusability and difficulty in maintenance are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0019] Figure 1 Shows a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Shows the original cross-sectional view of the present invention;

[0021] Figure 3 A prior art cross-sectional view of the present invention is shown. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0023] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0024] Reference Figure 1 , this embodiment provides an anti-jamming fan hydraulic cylinder, including a motor 1.

[0025] The indicator plate 2 is mounted on the output shaft of the motor 1 and is used to measure the rotation angle of the output shaft of the motor 1 .

[0026] The hydraulic cylinder 3 and the motor 1 are operated to control the oil amounts in the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder 3 .

[0027] The operation of motor 1 controls the oil volume in the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder 3. The rotation of the output shaft of motor 1 will drive the indicator plate 2 set on the output shaft of motor 1 to rotate. The stroke of hydraulic cylinder 3 can be calculated by the rotation angle of indicator plate 2. External feedback is performed by the external indicator plate 2, which avoids the jamming of internal parts in operation caused by the feedback mode of internal and external communication of hydraulic cylinder 3.

[0028] like Figure 2 As shown, a main shaft 4 is provided in the hydraulic cylinder 3 , a positioning shaft 5 is provided in the hydraulic cylinder 3 , and the positioning shaft 5 passes through the main shaft 4 , and a feedback component is provided at one end of the main shaft 4 passing through the hydraulic cylinder 3 .

[0029] like Figure 3As shown, the feedback assembly includes a feedback portion 6 and a flange 7 mounted on the feedback portion 6. A sealing cover 8 is provided on the feedback portion 6. The sealing cover 8 covers the feedback portion 6, facilitating the filling of the gap left by the indicator plate 2 after the feedback portion 6 is removed. As a result, after the modification, no rotating parts of the hydraulic cylinder 3 are exposed to the environment. This eliminates the potential for hydraulic cylinder 3 failures, which could result from rust and heavy dust accumulation on the feedback components of the hydraulic cylinder 3, leading to jamming during operation. This reduces the frequency of hydraulic cylinder 3 failures, improves unit operational reliability, and ensures the long-term safe and stable operation of the induced draft fan.

[0030] As an optional embodiment, an oil passage is provided in the main shaft 4 for communicating with the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder 3 respectively, and both oil flow passages are connected to the feedback part 6.

[0031] As an optional embodiment, a servo 9 is further included. The servo 9 is mounted within the feedback unit 6 and communicates with the two oil passages for providing feedback on the stroke of the hydraulic cylinder 3. When the motor 1 operates, the oil volume in the oil inlet and outlet chambers of the hydraulic cylinder 3 changes. This oil volume change flows through the oil passages into the feedback unit 6, thereby driving the servo 9 and displaying the oil volume change.

[0032] As an optional embodiment, a small single-sided rack 10 is further included. The small single-sided rack 10 is installed at the output end of the servo 9 for stroke feedback. The movement of the small single-sided rack 10 can accurately display the output of the servo 9 output end.

[0033] As an optional embodiment, the feedback unit 6 further includes a large gear 11 rotatably disposed within the feedback unit 6 and meshing with the single-sided pinion rack 10, and a half gear 12 disposed on the large gear 11. The arrangement of the large gear 11 and the half gear 12 enables direct feedback of the displacement change of the feedback unit 6, thereby achieving accurate expression of the displacement amount.

[0034] As an optional embodiment, a double-sided rack 13 is further included. The double-sided rack 13 is slidably disposed in the feedback portion 6 and is meshedly connected with the half gear 12 .

[0035] As an optional embodiment, indicator plate 2 includes a meshing gear 21 mounted on the output shaft of motor 1 and a scale plate 22 mounted on meshing gear 21. Meshing gear 21 is mounted on scale plate 22. Indicator plate 2 is a component removed from hydraulic cylinder 3 and does not require additional design and processing. Therefore, it includes meshing gear 21. However, the scale plate 22 needs to be recalibrated based on the blade opening conditions on site and on the DCS panel.

[0036] As an optional embodiment, indicator plate 2 meshes with double-sided rack 13, with double-sided rack 13 and half gear 12 located on either side of double-sided rack 13. Under existing feedback mechanisms, indicator plate 2 cooperates with double-sided rack 13 to directly display the oil levels in the inlet and outlet chambers of hydraulic cylinder 3 based on the rotation angle of indicator plate 2, providing precise feedback.

[0037] In the original feedback system, the servo 9 drives the movement of the single-sided small rack 10, which in turn drives the large gear 11, the half gear 12, the double-sided rack 13, and the indicator plate 2. Since the transmission between the above-mentioned parts easily leads to tooth breakage, the original feedback system often malfunctions and jams, requiring maintenance, which is very inconvenient.

[0038] In summary, the indicator plate 2 in the original feedback mechanism of the hydraulic cylinder 3 is removed and then installed on the output shaft of the motor 1. The rotation of the output shaft of the motor 1 drives the rotation of the indicator plate 2, and then the stroke of the hydraulic cylinder 3 is calculated by the rotation angle of the scale plate 22 on the indicator plate 2. The stroke of the hydraulic cylinder 3 drives the change of the rotation angle of the fan blade, and the change of the fan blade angle controls the change of the air intake volume, and the fan air intake volume is accurately controlled, thereby improving the stability of the fan operation; at the same time, it can also realize the disassembly and utilization of existing parts, avoiding the redesign and manufacture of parts, and avoiding the original feedback through the transmission cooperation between multiple parts to feedback caused by the breakage of any part and the unusability and maintenance difficulties.

[0039] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A fan hydraulic cylinder with an anti-jamming function, characterized by: include, Motor (1); an indicator plate (2), the indicator plate (2) being mounted on the output shaft of the motor (1) and being used to measure the rotation angle of the output shaft of the motor (1); A hydraulic cylinder (3), wherein the motor (1) operates to control the oil volume in the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder (3); The operation of the motor (1) controls the oil volume in the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder (3). The rotation of the output shaft of the motor (1) drives the indicator plate (2) arranged on the output shaft of the motor (1) to rotate. The stroke of the hydraulic cylinder (3) can be calculated by the rotation angle of the indicator plate (2). The indicator plate (2) arranged externally performs external feedback, thereby avoiding the jamming of the internal parts of the hydraulic cylinder (3) during operation caused by the feedback mode of the internal and external communication of the hydraulic cylinder (3).

2. The anti-jamming hydraulic cylinder for a fan according to claim 1, characterized in that: A main shaft (4) is provided in the hydraulic cylinder (3), a positioning shaft (5) is provided in the hydraulic cylinder (3), and the positioning shaft (5) fits through the main shaft (4), and a feedback component is provided at one end of the main shaft (4) passing through the hydraulic cylinder (3).

3. The anti-jamming hydraulic cylinder for a fan according to claim 2, characterized in that: The feedback assembly comprises a feedback portion (6) and a flange (7) arranged on the feedback portion (6); a sealing cover (8) is provided on the feedback portion (6).

4. The anti-jamming hydraulic cylinder for a fan according to claim 3, characterized in that: The main shaft (4) is provided with oil passages for communicating with the oil inlet chamber and the oil outlet chamber of the hydraulic cylinder (3) respectively, and the two oil flow passages are both connected to the feedback part (6).

5. The anti-jamming hydraulic cylinder for a fan according to claim 4, characterized in that: It also includes a servo (9), which is installed in the feedback part (6) and communicates with two oil channels, and is used to provide feedback on the stroke in the hydraulic cylinder (3).

6. The anti-jamming hydraulic cylinder for a fan according to claim 5, characterized in that: It also includes a small single-sided rack (10), which is installed at the output end of the servo (9) and is used for stroke feedback.

7. The anti-jamming hydraulic cylinder for a fan according to claim 6, characterized in that: The feedback part (6) further includes a large gear (11) rotatably arranged in the feedback part (6) and meshing with the single-sided small rack (10), and a half gear (12) arranged on the large gear (11).

8. The anti-jamming hydraulic cylinder for a fan according to claim 7, characterized in that: It also includes a double-sided rack (13), which is slidably arranged in the feedback portion (6), and the double-sided rack (13) is meshed and connected with the half gear (12).

9. The anti-jamming hydraulic cylinder for a fan according to claim 8, characterized in that: The indicating plate (2) comprises a meshing gear (21) arranged on the output shaft of the motor (1), and a scale plate (22) arranged on the meshing gear (21).

10. The anti-jamming hydraulic cylinder for a fan according to claim 9, characterized in that: The indicating plate (2) is meshed with the double-sided rack (13), and the double-sided rack (13) and the half gear (12) are respectively located on both sides of the double-sided rack (13).

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