CN108061918B

CN108061918B - Lubricating oil metal chip detection device

Info

Publication number: CN108061918B
Application number: CN201711130065.8A
Authority: CN
Inventors: 徐乙人; 毛福荣; 赵宏达
Original assignee: AECC Shenyang Engine Research Institute
Current assignee: AECC Shenyang Engine Research Institute
Priority date: 2017-11-15
Filing date: 2017-11-15
Publication date: 2020-06-05
Anticipated expiration: 2037-11-15
Also published as: CN108061918A

Abstract

The invention relates to the technical field of mechanical equipment maintenance, and particularly provides a lubricating oil metal chip detection device, wherein a metal chip capturing device is composed of a metal chip set and an insulating shell, the metal chip set is arranged in the insulating shell and is composed of a series of metal chips arranged in parallel, a certain gap is formed between every two adjacent metal chips, and the number of the metal chips in the metal chip set is at least 3. Each metal sheet in the metal sheet group is connected to the measuring circuit through a lead, when metal scraps in the lubricating oil are intercepted by the metal sheet group, a plurality of adjacent metal sheets in the metal scrap sheet group are conducted, so that the change of related parameters in the measuring circuit is caused, and the quantity of the metal scraps intercepted by the metal sheet group can be judged according to the change condition of the parameters of the measuring circuit.

Description

Lubricating oil metal chip detection device

Technical Field

The invention relates to the technical field of mechanical equipment maintenance, in particular to a lubricating oil metal chip detection device.

Background

By monitoring the metal scraps in the lubricating oil of the mechanical device, whether the mechanical device is abnormally abraded or not can be judged. There are many kinds of lubricating oil metal chip detection devices. One is magnetic blocking, and whether the mechanical device has abnormal wear is judged by visually checking the metal filing quantity of the head part of the magnetic blocking; the second is an electric chip detection device, and when a detection head is conducted by metal chips in lubricating oil and current is conducted, an alarm signal is sent out; the third is a mechanical chip detection device, which utilizes a filter screen to capture metal and non-metal chips, and sends out an alarm signal when the pressure difference of the lubricating oil before and after the filter screen is increased to a certain value.

The existing electric chip end detection device cannot reflect the amount of captured metal chips in real time, and only when all gaps among all metal sheets are filled with the metal chips, an alarm signal can be triggered, so that abnormal abrasion of a mechanical device cannot be found as early as possible.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the invention provides a lubricating oil metal chip detection device, which comprises:

the metal chip capturing device comprises an insulating shell and N metal sheets arranged in the insulating shell, wherein N is more than or equal to 3, the N metal sheets are parallel to each other, the distance between the N metal sheets is set according to the size of metal chips, and lubricating oil flowing in a direction parallel to the metal sheets flows through the insulating shell;

the measuring circuit comprises a power supply, a current measuring module and N +1 resistors which are sequentially connected in series, a lead is led out between every two adjacent resistors, and the other end of each lead is connected with one metal sheet.

Preferably, the number of the metal sheets is 9.

Preferably, the spacing between the metal sheets is 0.4 mm.

Preferably, the current measuring module is an ammeter.

Preferably, the resistance of the resistor is 1k Ω, and the voltage of the power supply is 5V.

According to the lubricating oil metal chip detection device, the resistance value of the resistor connected with the metal sheet is calculated according to the principle that the metal chips are conducted with the metal sheet, the quantity of the captured metal chips is reflected in real time through the change of the resistance value, abnormal abrasion of a mechanical device can be found as early as possible, and therefore the fault rate of the mechanical device is reduced.

Drawings

The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining and illustrating the present invention and should not be construed as limiting the scope of the present invention.

FIG. 1 is a connection diagram of an exemplary embodiment of the present invention;

fig. 2 is a perspective view of a swarf trapping device in an exemplary embodiment of the invention.

Reference numerals:

11 insulating housing

12 sheet metal

21 power supply

22 Current measurement Module

23 resistance

24 wire

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.

It should be noted that: in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some embodiments of the present invention, not all embodiments, and features in embodiments and embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are used for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

As shown in fig. 1 and 2, the lubricating oil metal chip detection device provided by the invention comprises a metal chip capture device and a measurement circuit. The metal chip catching device comprises an insulating shell 11 and N metal sheets 12 which are arranged in the insulating shell 11, wherein N is more than or equal to 3, and the number of the metal sheets 12 is 9 in the embodiment. The 9 metal sheets 12 are parallel to each other and the distance between them is set according to the size of the metal filings, in this embodiment, the distance between the metal sheets 12 is 0.4 mm. The insulating housing 11 is internally filled with lubricating oil flowing in parallel to the metal sheet 12. The measuring circuit comprises a power supply 21, a current measuring module 22 and N +1 resistors 23, i.e. 10 resistors 23, connected in series in sequence. In this embodiment, the current measuring module 22 is an ammeter, the resistance of the resistor 23 is 1k Ω, and the voltage of the power supply 21 is 5V. A lead 24 is led out between every two adjacent resistors 23, and the other end of each lead 24 is connected with one metal sheet 12, i.e. the number of the leads 24 is the same as that of the metal sheets 12.

The working principle of the invention is as follows:

as shown in fig. 1 and 2, when the lubricant containing the metal chips flows through the metal sheet 12 inside the insulating housing 11 according to the direction shown by the arrow in fig. 2, the metal chips are intercepted by the metal sheet 12, a plurality of adjacent metal sheets in the metal sheet 12 are conducted by the metal chips, and the corresponding resistors 23 are shorted, so that the total resistance in the measuring circuit becomes small, and the current measured in the current measuring module 22 increases. According to the current value measured by the current measuring module 22, the number of the short-circuited resistors 23 can be calculated, so that the amount of metal chips captured by the metal sheet 12 can be judged. The greater the current value measured by the current measurement module 22, the more swarf the device captures.

When the size of the swarf in the lubricant approaches or exceeds 0.4mm in the gap between the metal pieces 12, the swarf is easily intercepted by the metal pieces 12.

When there is no metal chip on the metal sheet 12, the current measured by the current measuring module 22 is 5V/(10 × 1k Ω) ═ 0.5 mA. When a small amount of metal dust is on the metal sheet 12 and only one pair of metal sheets 12 in the ferromagnetic metal sheet 12 is turned on, the corresponding one of the resistors 23 is shorted, and the current measured by the current measuring module 22 is 5V/(9 × 1k Ω) ═ 0.56 mA.

When the metal chips short-circuit the N resistors 23, the current measured by the current measuring module 22 is 5V/[ (10-N). times.1 k.OMEGA ].

When all the gaps in the metal sheet 12 are filled with metal chips, a total of 8 resistors 23 are shorted, and only the remaining 2 resistors 23 are not shorted, and the current measured by the current measuring module 22 is 5V/(2 × 1k Ω) ═ 2.5 mA.

In summary, the current measured by the current measuring module 22 ranges from 0.5mA to 2.5mA, and the larger the measured current is, the more swarfs are captured in the lubricant swarfs detecting device.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. Lubricating oil metal fillings detection device, its characterized in that includes:

the metal chip capturing device comprises an insulating shell (11) and N metal sheets (12) arranged in the insulating shell (11), wherein N is more than or equal to 3, the N metal sheets (12) are parallel to each other, the distance between the N metal sheets is set according to the size of metal chips, and lubricating oil flowing in a direction parallel to the metal sheets (12) flows through the insulating shell (11);

the measuring circuit comprises a power supply (21), a current measuring module (22) and N +1 resistors (23) which are sequentially connected in series, a lead (24) is led out between every two adjacent resistors (23), and the other end of each lead (24) is connected with one metal sheet (12).

2. The lubricant swarf detection device according to claim 1, wherein the number of the metal pieces (12) is 9.

3. The lubricant swarf detection device of claim 1, wherein the spacing between the metal sheets (12) is 0.4 mm.

4. The lubricant swarf detection device of claim 1, wherein the current measurement module (22) is an ammeter.

5. The lubricant metal chip detection device according to claim 1, wherein the resistance value of the resistor (23) is 1k Ω, and the voltage of the power supply (21) is 5V.