Hydraulic cylinder structure for adjusting impeller of long shaft type movable blade adjustable fan

Abstract

The utility model relates to the technical field of hydraulic cylinders, and discloses a hydraulic cylinder structure for adjusting a long shaft type movable blade adjustable fan impeller, which comprises a shell, a valve sleeve is fixedly connected in the shell, a piston rod is connected in the shell in a sliding manner, a valve core is connected in the valve sleeve in a sliding manner, and a piston rod is connected in the piston rod in a sliding manner. A spring is fixedly connected to the outer wall of the valve element, an oil inlet and an oil outlet are formed in the valve sleeve, and a right cavity and a left cavity are formed in the shell. According to the hydraulic cylinder, the states of the oil inlet and the oil outlet can be controlled by changing the position of the valve element, the pressure of oil in the two cavities of the hydraulic cylinder can be changed under the connection of the left cavity and the right cavity, the moving direction of the shell can be controlled by different stress areas between the right cavity and the right cavity, and the effects of stable adjustment and high efficiency of the hydraulic cylinder are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder structure used for adjusting an impeller of a fan with adjustable long-axis moving blades. Background Art

[0002] The existing impeller adjustment mechanism is to adjust the impeller by manually adjusting a handwheel from the outside of the fan. This mechanical adjustment method must wait until the fan is stationary for adjustment. The adjustment method is relatively backward, inconvenient to operate and inefficient.

[0003] The present invention adjusts the impeller in the form of hydraulic drive. The component integrates the hydraulic cylinder and the servo valve group. Not only can the impeller be adjusted while the fan is running, but the adjustment is also convenient, labor-saving and efficient. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a hydraulic cylinder structure for adjusting the impeller of a long-axis type fan with adjustable moving blades, aiming to improve the problem of the existing impeller adjustment mechanism automatically adjusting the impeller.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A hydraulic cylinder structure for adjusting the impeller of a long-axis movable blade adjustable fan comprises a housing, a valve sleeve fixedly connected to the interior of the housing, a piston rod slidably connected to the interior of the housing, a valve core slidably connected to the interior of the valve sleeve, a spring fixedly connected to the outer wall of the valve core, an oil inlet and an oil outlet provided in the interior of the valve sleeve, and a right chamber and a left chamber provided in the interior of the housing.

[0007] Preferably, the valve sleeve and valve core are combined into a servo valve.

[0008] Preferably, the interior of the housing and the outer wall of the valve sleeve are fixed with bolts.

[0009] Preferably, the outer wall of the valve sleeve is slidably connected to the inside of the piston rod.

[0010] Preferably, the outer wall of the spring is slidably connected to the interior of the valve sleeve.

[0011] The utility model has the following beneficial effects:

[0012] 1. In the utility model, the state of the oil inlet and the oil outlet can be controlled by changing the position of the valve core. Under the connection of the left chamber and the right chamber, the pressure of the oil in the two chambers of the hydraulic cylinder can be changed. The direction of movement of the shell can be controlled by the difference in the force area between the left chamber and the right chamber, thereby achieving the effect of stable adjustment and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a plan view of a hydraulic cylinder structure for adjusting the impeller of a long-axis fan with adjustable moving blades, proposed by the utility model.

[0014] Legend:

[0015] 1. Housing; 2. Piston rod; 3. Valve sleeve; 4. Valve core; 5. Spring; 6. Right chamber; 7. Left chamber; 8. Oil inlet; 9. Oil outlet. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Reference Figure 1 The utility model provides an embodiment: a hydraulic cylinder structure for adjusting the impeller of a long-axis movable blade adjustable fan, including a shell 1, a valve sleeve 3 is fixedly connected to the interior of the shell 1, a piston rod 2 is slidably connected to the interior of the shell 1, a valve core 4 is slidably connected to the interior of the valve sleeve 3, a spring 5 is fixedly connected to the outer wall of the valve core 4, an oil inlet 8 and an oil outlet 9 are provided inside the valve sleeve 3, and a right chamber 6 and a left chamber 7 are provided inside the shell 1; the valve sleeve 3 and the valve core 4 are combined into a servo valve; the interior of the shell 1 and the outer wall of the valve sleeve 3 are fixed by bolts; the outer wall of the valve sleeve 3 is slidably connected to the interior of the piston rod 2; the outer wall of the spring 5 is slidably connected to the interior of the valve sleeve 3.

[0018] Specifically, by changing the position of the valve core 4, the state of the oil inlet 8 and the oil outlet 9 can be controlled. By connecting the left chamber 7 and the right chamber 6, the oil pressure in the two chambers of the hydraulic cylinder can be changed. By the different force areas between the left chamber 7 and the right chamber 6, the moving direction of the shell 1 can be controlled, thereby achieving the effect of stable and efficient adjustment. The valve sleeve 3 and the valve core 4 are combined into a servo valve, which can adjust the oil circuit and realize the oil supply and oil discharge of the left and right chambers of the hydraulic cylinder. The spring 5 can absorb the impact vibration of the valve core 4 when it is displaced, so that the valve core 4 can have a more stable axial displacement. Each displacement component is equipped with a sealing ring of different shapes for sealing. Each component is in a follow-up state when moving, and there is no jamming during movement.

[0019] Working principle: When the mechanism is needed, first, when the valve core 4 is stationary, the oil inlet 8 in the valve core 4 and the oil inlet 8 at the left chamber 7 position in the valve sleeve 3 are always kept connected, and oil is continuously supplied to the left chamber 7 of the hydraulic cylinder, but the oil discharge port 9 of the right chamber 6 of the hydraulic cylinder is blocked by the valve core 4, and the hydraulic cylinder is in a stationary state at this time; when the valve core 4 moves to the right and stops, the oil inlet 8 of the valve core 4 and the oil inlet 8 of the left chamber 7 of the valve sleeve 3 are still kept connected. Since the valve core 4 moves to the right, the oil inlet 8 of the valve core 4 is connected to the oil inlet 8 of the right chamber 6 of the hydraulic cylinder. At this time, the oil inlet 8 of the valve core 4 is connected to the left and right chambers of the hydraulic cylinder at the same time, satisfying the hydraulic differential connection. At this time, the oil pressure in the two chambers of the hydraulic cylinder is the same, but the force area of the right chamber 6 is larger, so the thrust of the right chamber 6 is greater, causing the shell 1 to move to the right, where the shell 1 and the valve sleeve 3 are fixed together and move at the same time. The displacement of the valve sleeve 3 causes oil to enter the right chamber 6 of the hydraulic cylinder. After the oil pressure in the oil pump is reduced, the oil pressure in the oil pump will be increased, and the oil pressure in the oil pump will be increased.

[0020] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic cylinder structure for adjusting the impeller of a long-axis fan with adjustable blades, comprising a housing (1), characterized in that: The housing (1) is fixedly connected to a valve sleeve (3), the housing (1) is slidably connected to a piston rod (2), the valve sleeve (3) is slidably connected to a valve core (4), the outer wall of the valve core (4) is fixedly connected to a spring (5), the valve sleeve (3) is provided with an oil inlet (8) and an oil outlet (9), and the housing (1) is provided with a right chamber (6) and a left chamber (7).

2. The hydraulic cylinder structure for adjusting the impeller of a fan with adjustable long-axis moving blades according to claim 1, characterized in that: The valve sleeve (3) and the valve core (4) are combined into a servo valve.

3. The hydraulic cylinder structure for adjusting the impeller of a fan with adjustable long-axis moving blades according to claim 1, characterized in that: The interior of the housing (1) and the outer wall of the valve sleeve (3) are fixed with bolts.

4. The hydraulic cylinder structure for adjusting the impeller of a fan with adjustable long-axis moving blades according to claim 3, characterized in that: The outer wall of the valve sleeve (3) is slidably connected to the interior of the piston rod (2).

5. The hydraulic cylinder structure for adjusting the impeller of a fan with adjustable long-axis moving blades according to claim 1, characterized in that: The outer wall of the spring (5) is slidably connected to the interior of the valve sleeve (3).

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