JPH09112661A - Sensing device for chip inclusion in transmission oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip sensing device which can sense the chip amount contained in an oil and can judge properly how the eventual failure in the transmission is of urgent nature. SOLUTION: A chip sensing device concerned is composed of a chip sensor 1 equipped internally with a chip sensor module and filter matrix to admit passage of all oil in a transmission 20, a chip sensing controller 10 which is connected with the positive and negative electrodes furnished at the two ends of a plurality of magnets constituting the chip sensor module and judges the chip amount upon measuring the electric conductivity between the electrodes, and an alarm panel 15 which is connected with the controller 10 and displays and issues alarm for the degree of wear or damage of the transmission 20. This enables precision presumption and display of the wear and damage of the transmission 10, which allows a pilot to easily judge the current situation and take proper countermeasure, and it is possible to make not only chip sensing by the sensor 1 but also simultaneous removal of the chip to lead to a reduction of the equipment cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission oil tip detection device applied to a transmission of a helicopter or the like.

[0002]

2. Description of the Related Art A tip detecting device applied to a conventional helicopter transmission is a tip detecting sensor 0.
2 is attached to the bottom of the gearbox housing 01 of the transmission as shown in FIG. 4, and the detection part is inserted therein, and iron scraps and iron powder in the lubricating oil 03 caused by wear and damage of gears, bearings, etc. (Chip) 04 was detected.

As shown in FIG. 5, the tip detecting sensor 02 has a magnet ring 05, a + pole ring 06, and a detecting portion, as shown in FIG.
It is composed of the pole ring 07 and the insulator 08, and when the tip 04 in the lubricating oil 03 is attracted between the + pole ring 06 and the − pole ring 07 by the magnetic force of the magnet ring 05 and short-circuits between them, the + pole Ring 06 and-pole ring 0
The power was supplied during 7 and a signal was transmitted to an external controller (not shown) via the detection circuit 09 to detect the presence of the chip 04 in the lubricating oil 03.

[0004]

In the conventional chip detecting device, as described above, the presence of the chip is detected when the chip short-circuits between the positive electrode ring and the negative electrode ring of the chip detecting sensor. Therefore, the detection area of the chip is limited between the positive electrode ring and the negative electrode ring, is extremely narrow, and it may not be possible to detect when the chip is small.

Further, since the tip is detected depending on whether or not the + pole ring and the − pole ring are short-circuited, the amount of the tip cannot be grasped, and the pilot cannot detect the transmission abnormality. It was not possible to accurately judge the urgency and urgency. The present invention seeks to solve the above problems.

[0006]

According to a first aspect of the present invention, there is provided a transmission oil tip detecting device comprising: a plurality of magnets having a positive pole and a negative pole respectively provided at both ends thereof; and a plurality of slit portions. A chip detection sensor that is formed by a cylindrical chip sensor module and a cylindrical filter matrix that is arranged outside of the module, and oil circulates between the transmission and the transmission, and a chip of the sensor connected to the sensor. Equipped with a chip detection controller that measures the conductivity between the positive and negative electrodes of the sensor module to measure the content of chips in the oil, and an alarm panel that inputs the output signal of the controller and displays a failure indication and issues an alarm. It is characterized by that.

In the above description, when the oil circulating between the transmission and the tip detection sensor contains a tip made of iron scraps, iron powder or the like caused by wear and damage of the transmission, the tip detection sensor A magnet forming the chip sensor module draws this chip and forms a bridge by the chip between the positive and negative poles.

Since the amount of chips forming this bridge increases in proportion to the progress of wear and damage of the transmission, and increases the conductivity between the positive and negative electrodes, it is necessary to measure this conductivity. Thus, the chip amount can be determined and the degree of wear and damage of the transmission can be estimated.

A chip detection controller is connected to the + pole and the − pole, and the controller constantly applies a predetermined minute voltage to measure the conductivity between the + pole and the − pole. Based on this conductivity, the amount of chips in the oil is determined, the wear / damage situation of the transmission is estimated and output to an alarm panel, which displays the progress of wear / damage of the transmission. , When the degree of wear / damage exceeds a predetermined limit, an alarm is issued.

In the present invention, unlike the conventional device, the presence or absence of chips is not judged for some oils in the transmission, but the content of chips is measured for all oils. Since the content can be grasped and the wear and damage of the transmission can be estimated based on this data, the pilot can easily judge the situation and take appropriate and prompt measures. It will be possible.

Further, since the chip detection sensor is provided with the filter matrix together with the chip sensor module, not only the content of the chip in the oil can be detected but also the chip can be removed by the detection.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a chip detecting device for a helicopter transmission according to an embodiment of the present invention.
This will be described with reference to FIGS.

The tip detecting device according to the present embodiment shown in FIG. 1 has a tip detecting sensor 1 in which oil circulates between a gear box 20 of a helicopter transmission,
A chip detection controller 10 to which the sensor 1 is connected, an arithmetic module 11, a program module 12, and a power supply module 13 are provided, and an external program is input to supply a power supply of 24 VDC, and a failure display plate 16 and a warning light connected to the controller 10. An alarm panel 15 provided with 18 and a reset switch 17 is provided.

As shown in FIG. 1B, the tip detecting sensor 1 provided in the tip detecting device has a helicopter / gearbox 20 with an oil inlet through a return oil pipe 21.
The oil outlet is connected to the helicopter gearbox 20 through the oil return pump 22, the oil cooler 23, the oil tank 24, the lubricating oil pump 25, and the pressure regulator 26.

The chip detection sensor 1 is shown in FIG.
As shown in (a), a cylindrical sensor housing 2 having an oil inlet 2a on the upper side and an oil outlet 2b on the side, and a sensor cap screwed to the lower part of the housing 2 via an O-ring 8. 3. A cylindrical filter matrix 4 disposed inside the sensor housing 2 and fixed by an O-ring 8 provided between the sensor housing 2 and the sensor housing 2, and a cylindrical filter matrix disposed inside the filter matrix 4. A chip sensor module 5, an electrode mold 6 formed between the module 5 and the sensor cap 3, and a lower surface of the electrode mold 6 screwed from the outside to a central portion of the sensor cap 3 via a sealing member 9. It is provided with a signal connector 7 for contact.

The chip sensor module 5 forming the chip detection sensor 1 has a magnet 5 as shown in FIG.
A ring formed by b, the + pole 5c, the − pole 5d, and the insulating member 5e is provided with a slit portion 5f between them, and a plurality of rings are stacked, and this is supported by the insulating support member 5a.

In the above description, the oil in the helicopter gearbox 20 is supplied to the chip detection sensor 1 via the oil return pipe 21, and the oil supplied to the sensor 1 is provided inside the sensor 1. The slit portion 5f of the chip sensor module 5 and the filter matrix 4
After passing through the oil return pump 22, oil cooler 23,
The oil is returned to the helicopter gearbox 20 again via the oil tank 24, the lubricating oil pump 25, and the pressure regulator 26, and constantly circulates between the tip detection sensor 1.

When the oil contains a chip made of iron scraps or iron powder such as gears and bearings, in the chip detection sensor 1, this chip is provided on the inner and outer surfaces of the chip sensor module 5. Are attracted by the plurality of magnets 5b forming the
A bridge by a tip is formed between c and the negative pole 5d.

The bridge formed by the tip formed between the positive pole 5c and the negative pole 5d is worn by gears and bearings.
As the damage progresses and the number of chips contained in the oil increases, more chips are formed and higher conductivity is exhibited.

The positive electrode 5c and the negative electrode 5d are the signal connector 7
It can be connected to the outside via the chip detection sensor 1
Is connected to the chip detection controller 10 via this.

The chip detection controller 10 constantly applies a minute voltage between the + pole 5c and the − pole 5d of the chip detection sensor 1, and if a bridge is formed between the chips, a minute current flows. Then, the electric conductivity (or resistance value) between the + pole 5c and the − pole 5d is obtained from this current, and the degree of wear or damage of the gears, bearings, etc. is judged from this value, and the failure display plate 16 of the alarm panel 15 is judged. Display,
When this value exceeds the predetermined value, the warning light 18 is turned on.

Regarding the chip detection controller 10, an external program may be input depending on the situation to change the set value for the alarm and the content of the alarm and display by the alarm panel.

In the present embodiment, unlike the conventional device, the presence or absence of the tip is not judged for a part of the oil in the gear box, but the content of the tip is measured for all the oil, so that the tip with high reliability is obtained. Since the content can be grasped and the equipment wear / damage status is judged and displayed based on this data, the pilot can easily judge the status and take appropriate corrective measures promptly. Became possible.

Further, in the chip detection sensor 1,
Chip sensor module 5 and filter matrix 4
Is provided, the chip including the non-magnetic one is removed at the same time when the chip is detected.

Although the filter matrix and the chip sensor module 5 need to be properly cleaned, the chip sensor module 5 is cleaned by demagnetizing the magnet 5b with a degaussing device and then using an ultrasonic cleaning device. It can be easily used, and after cleaning, it is magnetized and restored by a magnetizing device.

[0026]

According to the present invention, there is provided a chip detection device for oil for a transmission, which includes a chip sensor module through which all oil of the transmission passes, a chip detection sensor having a filter matrix therein, and a chip sensor module of the sensor. Is provided at each end of a plurality of magnets
By providing a chip detection controller that is connected to the negative and negative poles and measures the conductivity between them to determine the amount of chips, and an alarm panel that is connected to the controller and displays the degree of wear and damage of the transmission and issues an alarm. Since it is possible to estimate the wear and damage of the transmission with high accuracy and this is displayed, it becomes easier for the pilot to judge the situation, and it is possible to take appropriate corrective action quickly. Not only the detection but also the removal can be carried out at the same time, so that the equipment cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a chip detection device according to an embodiment of the present invention, (a) is an overall view, and (b) is a pipe connection diagram of a chip detection sensor.

FIG. 2 is a sectional view of the chip detection sensor according to the embodiment.

3A and 3B are explanatory views of a chip sensor module forming the chip detection sensor according to the above embodiment, FIG. 3A is an overall perspective view, and FIG. 3B is a detailed view of a portion A of FIG. 3A.

FIG. 4 is a mounting view of a conventional chip detection sensor.

FIG. 5 is a sectional view of the conventional chip detection sensor.

[Explanation of symbols]

 1 chip detection sensor 2 sensor housing 3 sensor cap 4 filter matrix 5 chip sensor module 10 chip detection controller 15 alarm panel 20 helicopter / gearbox

Claims (1)

[Claims] 1. A cylindrical chip sensor module formed by a plurality of magnets each having a + pole and a − pole provided at both ends and a plurality of slits, and a cylindrical filter matrix arranged outside thereof. A chip detection sensor that is installed inside and in which oil circulates between the transmission and the chip sensor module of the same sensor that is connected to the sensor. A transmission oil tip detection device comprising: a tip detection controller for measuring the oil pressure; and an alarm panel for inputting an output signal of the controller to display a failure and issue an alarm.