CN218416346U - Fan becomes oar limit switch mechanism based on laser-induced - Google Patents

Abstract

The utility model discloses a fan becomes oar limit switch mechanism based on laser-induced, including laser reflection base, laser emission inductor and laser reflector, wherein, the laser emission inductor is fixed and is become oar limit signal point department on the oar bearing base of fan, laser reflector fixes on laser reflection base, laser reflection base fixes on the oar gear that becomes of fan, can rotate along with becoming the oar gear, realizes that laser reflector triggers the limit switch function when resetting with the laser emission inductor. The utility model discloses a improve former mechanical type limit switch into laser induction system, realize original limit switch function, the reliability is high, whole mechanism simple structure, it is convenient to overhaul, and components and parts are with low costs, easy the change.

Description

Fan becomes oar limit switch mechanism based on laser-induced

Technical Field

The utility model belongs to the technical field of wind power generation's technique and specifically relates to indicate a fan becomes oar limit switch mechanism based on laser-induced.

Background

The fan drives a speed reducer through a motor, and a speed reducer gear drives a variable pitch bearing gear to perform variable pitch operation of the fan. In the pitch control process, a mechanical limit switch is usually adopted as a trigger for stopping the pitch control of the fan. In the actual operation process, foreign matters in the engine room are easy to adhere to the mechanical limit switch, so that the mechanical device is stuck and misreported, the misoperation of the fan is caused, and the feathering of the fan is influenced. In the use process of the mechanical limit switch, the mechanical limit switch is damaged by fatigue accumulation, the contact is easy to wear, the mechanical structure is easy to damage, the function failure of the mechanical limit switch is caused, and the normal variable pitch control of the fan is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome prior art's shortcoming and not enough, provide a fan becomes oar limit switch mechanism based on laser-induced, through improving former mechanical type limit switch into laser induction system, realize original limit switch function, the reliability is high, whole mechanism simple structure, and it is convenient to overhaul, and components and parts are with low costs, the easy change.

In order to achieve the above purpose, the utility model provides a technical scheme does: a fan variable pitch limit switch mechanism based on laser induction comprises a laser reflection base, a laser emission inductor and a laser reflector, wherein the laser emission inductor is fixed at a variable pitch limit signal point on a variable pitch bearing base of a fan, the laser reflector is fixed on the laser reflection base, the laser reflection base is fixed on a variable pitch gear of the fan and can rotate along with the variable pitch gear, and the limit switch function is triggered when the laser reflector and the laser emission inductor are combined.

Further, the variable pitch limit signal point is a variable pitch limit angle of the fan.

Further, the pitch limiting angle is a pitch angle of 91 degrees.

Compared with the prior art, the utility model, have following advantage and beneficial effect:

1. the utility model discloses do not have mechanical structure, the risk that does not have the limit switch inefficacy that mechanical damage brought has also not had mechanical damage and foreign matter and has adhered to the situation that leads to the limit switch jamming that causes, has promoted limit switch's life.

2. The utility model discloses simple structure overhauls the convenience, and components and parts are with low costs, easy change to reduce the fan cost of overhaul that the relevant components and parts of change caused.

Drawings

FIG. 1 is an installation schematic diagram of a laser induction-based fan pitch limit switch mechanism.

FIG. 2 is one of the partial enlarged views of the fan pitch limit switch mechanism based on laser induction.

Fig. 3 is a second partial enlarged view of the fan pitch limit switch mechanism based on laser induction.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1 to 3, the embodiment discloses a fan pitch limit switch mechanism based on laser sensing, which includes a laser reflection base 1, a laser emission sensor 2 and a laser reflector 3, wherein the laser emission sensor 2 is fixed on a pitch bearing base 4 of a fan, the laser reflector 3 is fixed on the laser reflection base 1, the laser reflection base 1 is fixed on a pitch gear 5 of the fan and can rotate along with the pitch gear 5, so as to drive the laser reflector 3 to rotate, the pitch gear 5 starts to rotate under the work of pitch driving, when the laser reflection base 1 rotates to the point that the laser reflector 3 is overlapped with the laser emission sensor 2, a laser beam emitted by the laser emission sensor 2 is reflected, and a limit switch function is triggered, so that the limit monitoring and triggering functions of fan pitch are realized.

The spacing angle of the fan is generally 91 degrees, when the laser emission sensor 2 is installed, the fan is ensured to be installed at the spacing signal point of the fan, namely, the position of the fan is 91 degrees, and when the fan is installed, the laser beam emitted by the laser emission sensor 2 is ensured to coincide with the center of the laser reflector 3.

When the fan executes a pitch control process, a pitch control motor receives a pitch control signal given by the fan master control, the pitch control gear 5 is driven to rotate, the laser reflection base 1 and the laser reflector 3 which are fixed on the pitch control gear 5 rotate along with the pitch control gear 5 at the same angular speed, meanwhile, the laser emission sensor 2 emits a laser beam, when the center of the laser reflector 3 rotates to a position vertical to the beam emitted by the laser emission sensor 2, the laser reflector 3 completely reflects the laser beam to the laser emission sensor 2, the laser emission sensor 2 senses the laser beam at the moment, a pitch control limiting signal is triggered, the signal is transmitted to a fan master control interface, and the function of a limiting switch is completed.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims (3)

1. The utility model provides a fan becomes oar limit switch mechanism based on laser-induced which characterized in that: the laser emission sensor is fixed at a variable pitch limit signal point on a variable pitch bearing base of the fan, the laser reflector is fixed on the laser reflection base, the laser reflection base is fixed on a variable pitch gear of the fan and can rotate along with the variable pitch gear, and the limit switch function is triggered when the laser reflector and the laser emission sensor are reset.

2. The laser induction-based fan pitch limit switch mechanism of claim 1, wherein: the variable pitch limit signal point is a variable pitch limit angle of the fan.

3. The laser induction based fan pitch limit switch mechanism according to claim 2, characterized in that: the pitch limiting angle is 91 degrees.

Images