CN213600732U

CN213600732U - Mechanical type wind speed measuring instrument

Info

Publication number: CN213600732U
Application number: CN202023005517.XU
Authority: CN
Inventors: 谭星; 郑鹏; 张祖涛
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-07-02
Anticipated expiration: 2030-12-15

Abstract

The invention provides a mechanical anemometer, and relates to the technical field of anemometers. The inner diameter of the central ring is matched with the outer diameter of the lead screw nut and is fixed through a screw, and the bottom of the central ring is fixed with the upper end of the torsion spring; the screw nut is in threaded fit with the ball screw, and the diameter of the lower part of the screw nut is in interference fit with the inner ring of the deep groove ball bearing; the left end of the support arm seat is provided with three stages of stepped round holes, the first stage is in interference fit with the outer ring of the deep groove ball bearing, the upper surface of the second stage is in contact with the lower surface of the deep groove ball bearing, and the third stage is in clearance fit with the extending part of the ball screw; the lower end of the torsion spring is fixed with the outer wall of the stepped round hole of the support arm seat; the lower part of the ball screw is provided with scales, and the other side of the scales is provided with a slide rail; a sliding groove matched with the sliding rail is arranged below the left end of the support arm seat, an L-shaped pointer is arranged on the other side of the support arm seat, and threaded holes are formed in two side walls of the square blind hole below the right end of the support arm seat; the top of the handle is in a square shape, the square is provided with a through hole, and the handle is fixed with the square blind hole at the right end of the support arm seat through a bolt through the through hole.

Description

Mechanical type wind speed measuring instrument

Technical Field

The utility model relates to an anemometer technical field.

Background

Wind speed measurement is of great importance in partial meteorological scientific research experiment sampling, wind power generation prediction and speed regulation, and application scenes in which wind speed information needs to be acquired in partial practice to indicate next measures. The research on the related fields of accuracy, convenience, service life and the like of the anemometer is naturally indispensable.

In the prior art, the anemoscope consists of a monitoring instrument, an anemometer and a connecting cable, wherein the anemometer converts the measured wind speed from the rotating speed information into an electric signal and transmits the electric signal to the monitoring instrument so as to be checked by researchers and the like. However, the problems of complex installation operation, inconvenient power supply and the like exist sometimes, so that the practicability of the wind speed measuring instrument is reduced, and the device for measuring the wind speed through the rotating speed avoids the problem that the detection precision is influenced due to extra resistance caused by lubrication and other factors after the high-speed rotation is not used for a long time.

According to the search, there is currently a related anemometer, such as the chinese patent with chinese patent application number 2017100867208 entitled "anemometer for building", which includes a working platform, a measuring device, an LCD display screen, an indicator light and an optical fiber. The device can detect the wind speed, display the wind speed information through the LCD display screen, and have the function of prompting the users around. However, the device is divided into two parts, and is inconvenient to carry. And the anemometry principle is electromagnetic, needs to keep supplying power, if supply power is not enough then stop working, adopts electronic equipment more, leads to system structure stability relatively poor, influences life.

In view of the above-mentioned situation of anemometers, it is necessary to develop a highly stable and portable, purely mechanical anemometer.

Disclosure of Invention

The invention aims to provide a wind speed measuring mechanism which can effectively and directly transmit real-time wind speed information to an observer in a purely mechanical mode without any power supply mode.

The purpose of the invention is realized by the following technical scheme: a mechanical wind speed measuring instrument comprises a support, a wind cup and a handle, wherein the wind cup and a central ring form a three-wind cup component through a connecting piece; the inner diameter of the central ring is matched with the outer diameter of the lead screw nut and is fixed through a screw, and the bottom of the central ring is fixed with the upper end of the torsion spring; the screw nut is in threaded fit with the ball screw, and the diameter of the lower part of the screw nut is in interference fit with the inner ring of the deep groove ball bearing; the left end of the support arm seat is provided with three stages of stepped round holes, the first stage is in interference fit with the outer ring of the deep groove ball bearing, the upper surface of the second stage is in contact with the lower surface of the deep groove ball bearing, and the third stage is in clearance fit with the extending part of the ball screw; the lower end of the torsion spring is fixed with the outer wall of the stepped round hole of the support arm seat; the lower part of the ball screw is provided with scales, and the other side of the scales is provided with a slide rail; a sliding groove matched with the sliding rail is arranged below the left end of the support arm seat, an L-shaped pointer is arranged on the other side of the support arm seat, the needle point is aligned with the scale, a square blind hole is arranged below the right end of the support arm seat, and threaded holes are formed in two side walls of the square blind hole; the top of the handle is in a square shape, the square is provided with a through hole, and the handle is fixed with the square blind hole at the right end of the support arm seat through a bolt through the through hole.

The upper end of the sliding groove and the upper end of the L-shaped pointer are fixed with the bottom of the support arm seat.

The blind holes of the support arm seat are in clearance fit with the square blocks of the handle.

And the top end of the ball screw is provided with an end cap.

The sliding groove and the sliding rail on the ball screw form a sliding pair.

The working process and the working principle of the invention are as follows:

in the using process, an observer can hold the device by hand and lift the device overhead, when no wind exists, the device is in an initial state due to the existence of the torsion spring, and the pointer faces to the zero position of the scale mark below the ball screw; when wind blows, the wind cup can feel wind power and rotates anticlockwise, the screw nut fixed by the screw cup can rotate along with the wind cup, the screw nut is fixedly connected with the torsion spring, displacement in the vertical direction cannot occur, the ball screw cannot rotate due to the matching of the sliding groove and the sliding rail on the screw, and the ball screw and the scale part carved by the extension part below the ball screw translate downwards. Because the position of the pointer is unchanged, the scale is displaced, and the reading is changed. When the current wind speed is reached, the wind cup is balanced by the wind power and the torque force moment of the torsion spring, the wind cup stops rotating, the scale mark also stops changing, and an observer can directly read the current wind speed through the scale opposite to the pointer. When the wind speed is reduced, the clockwise internal torque of the torsion spring is higher than the anticlockwise wind torque sensed by the wind cup, the wind cup and the lead screw nut rotate, and the scale position vertically rises until the torsion force of the torsion spring is balanced with the wind torque of the wind cup. When the wind speed is too high, the end cap reaches the surface of the lead screw nut, the anemoscope reaches the maximum measurement value, and the work is stopped. The principle of the wind cup is similar to that of a vertical axis fan, and the wind cup is not influenced by horizontal wind direction. And the torsion spring parameter selection is selected after the standard anemometer is calibrated, and is simulated and calculated, so that the accuracy of the wind speed displayed by the scales is ensured.

Compared with the prior art, the invention has the beneficial effects that:

1. the wind speed measurement device adopts a pure mechanical structure, does not need any power supply equipment unlike the existing electronic anemometer, and realizes wind speed measurement by skillfully combining the torsion spring and the ball screw-screw nut. The equipment cannot be influenced by power supply problems and aging of electromagnetic elements, and electric shock, fire and sensor damage caused by partial misuse cannot occur;

2. the wind speed meter is different from the existing wind speed meter in principle, changes the traditional method that the wind speed is calculated by detecting the temperature of the metal wire heated by the current or the current generated by the magnetic induction wire cut by the high-speed rotation of the shaft driven by the wind cup into the method that the wind power closely linked with the wind speed is detected to balance the wind power with the torque of the torsion spring to obtain the popular information, thereby avoiding some unstable factors in the high-speed rotation process;

3. the invention is convenient to carry and use, has small size, and the handle and the wind cup can be detached; the wind cup is held by hand to lift the wind cup over the head, and the eyes just look up the pointer and the scale lines almost.

Drawings

FIG. 1 is a schematic overall appearance of the present invention;

FIG. 2 is a characteristic view of the support and lead screw nut;

FIG. 3 is a front view of the present invention;

fig. 4 is a view of the handle and bracket connection of the present invention.

Detailed Description

The purpose of the invention is realized by the following technical scheme: a mechanical wind speed measuring instrument comprises a supporting mechanism and a measuring mechanism. The supporting mechanism comprises a supporting arm seat 5 and a handle 9; the measuring mechanism comprises a wind cup 1, a connecting piece 16, a center ring 2, a ball screw 3, a screw nut 4 and a torsion spring 6. The number of the wind cups 1 is three, and the three wind cups are respectively fixed with the three connecting pieces 16 and then form a three wind cup component with the central ring 2. Three threaded holes which are 120 degrees are formed in the periphery of the central ring 2, the central ring is connected with the screw rod nut 4 through three screws 7, and the bottom of the central ring 2 is fixedly connected with the torsion spring 6. Three screw holes are arranged around the screw nut 4, the center of the screw nut is in threaded fit with the ball screw 3, and the lower circumferential surface of the screw nut is in interference fit with the inner ring of the deep groove ball bearing 11. The bottom of the torsion spring 6 is fixed with the outer wall of the stepped round hole of the support arm seat 5. The extension part below the ball screw 3 is marked with scales, one side of the scales is provided with a slide rail 15, and an end cap 14 is arranged above the ball screw 3. Taking fig. 3 as a front view, a third-stage stepped circular hole is formed in the left side of the support arm seat 5, the first stage is in interference fit with the outer ring of the deep groove ball bearing 11, the upper surface of the second stage is in contact with the lower surface of the deep groove ball bearing 11, and the third stage is in clearance fit with the extending part of the ball screw 3. A sliding chute 12 and an L-shaped pointer 13 are fixed below the left side of the support arm seat 5, and the sliding chute 12 and a sliding rail 15 on the ball screw 3 form a sliding pair. A square blind hole is formed below the right side of the support arm seat 5, and threaded holes are formed in two side walls of the blind hole. The top of the handle 9 is in a square shape, a hole penetrates through the square from front to back, and the handle 9 is connected with a threaded hole of the square blind hole of the support arm seat 5 through the hole by a bolt 8 and a nut 17.

And the top end of the ball screw is provided with an end cap.

The sliding groove and the sliding rail on the ball screw form a sliding pair.

The ball screw 3 and the scales are a component, and the scales are engraved on the extension shaft of the ball screw 3.

The working process and the working principle of the invention are as follows:

in the using process, an observer can hold the device by hand and lift the device overhead, when no wind exists, the device is in an initial state due to the existence of the torsion spring 6, and the pointer faces to the zero position of the scale mark below the ball screw 3; when wind blows, the wind cup can feel wind power and rotates anticlockwise, the screw nut fixed by the screw 7 can rotate along with the wind cup, the screw nut 4 is fixedly connected with the torsion spring 6, displacement in the vertical direction cannot occur, the ball screw 3 cannot rotate due to the matching of the sliding groove 12 and the upper sliding rail 15 of the screw, and the ball screw 3 and the scale part carved by the extension part below the ball screw can move downwards. Since the position of the L-shaped pointer 13 is unchanged, the scale is displaced, and the reading is changed. When the current wind speed is reached, the wind cup 1 is balanced by the wind power and the torque force moment of the torsion spring 6, the wind cup stops rotating, the scale mark also stops changing, and an observer can directly read the current wind speed through the scale opposite to the pointer 13. When the wind speed is reduced, the clockwise internal torque of the torsion spring 6 is higher than the anticlockwise wind torque sensed by the wind cup, the wind cup 1 and the lead screw nut 4 rotate, and the scale position vertically rises until the torque of the torsion spring 6 is balanced with the wind torque of the wind cup 1. When the wind speed is too high, the end cap 14 reaches the surface of the lead screw nut, the anemometer reaches the maximum measurement value, and the work is stopped. The principle of the wind cup 1 is similar to that of a vertical axis fan, and the wind cup is not influenced by horizontal wind direction. And the torsion spring parameter selection is selected after the standard anemometer is calibrated, and is simulated and calculated, so that the accuracy of the wind speed displayed by the scales is ensured.

Claims

1. The utility model provides a mechanical type anemometry appearance, includes that support arm seat (5), vane (1) and handle (9), vane (1) pass through connecting piece (16) and centre ring (2) constitute a three vane component, its characterized in that: the inner diameter of the central ring (2) is matched with the outer diameter of the screw nut (4) and is fixed through a screw (7), and the bottom of the central ring (2) is fixed with the upper end of the torsion spring (6); the screw nut (4) is in threaded fit with the ball screw (3), and the diameter of the lower part of the screw nut is in interference fit with the inner ring of the deep groove ball bearing (11); the left end of the support arm seat (5) is provided with three stages of stepped round holes, the first stage is in interference fit with the outer ring of the deep groove ball bearing (11), the upper surface of the second stage is in contact with the lower surface of the deep groove ball bearing (11), and the third stage is in clearance fit with the extension part of the ball screw (3); the lower end of the torsion spring (6) is fixed with the outer wall of the stepped round hole of the support arm seat (5); scales are arranged at the lower part of the ball screw (3), and a slide rail (15) is arranged at the other side of the scales; a sliding groove (12) matched with the sliding rail is arranged below the left end of the support arm seat (5), an L-shaped pointer (13) is arranged on the other side of the support arm seat, the needle point is aligned with the scale, a square blind hole is arranged below the right end of the support arm seat (5), and threaded holes are formed in two side walls of the square blind hole; the top of the handle (9) is in a square block shape, the square block is provided with a through hole, and the handle (9) is fixed with a square blind hole at the right end of the support arm seat (5) through a bolt (8) through the through hole.

2. The mechanical anemometer of claim 1 wherein: the upper end of the sliding chute (12) and the upper end of the L-shaped pointer (13) are fixed with the bottom of the support arm seat (5).

3. The mechanical anemometer of claim 1 wherein: the blind hole of the support arm seat (5) is in clearance fit with the square of the handle (9).

4. The mechanical anemometer of claim 1 wherein: an end cap (14) is arranged at the top end of the ball screw (3).

5. A mechanical anemometer according to claim 2 wherein: the sliding chute (12) and a sliding rail (15) on the ball screw (3) form a sliding pair.