CN221124404U - Oil free water detection sensor - Google Patents

Abstract

The utility model discloses an oil free water detection sensor, which comprises a shell, a main controller and a free water detection module, wherein the main controller is connected with the shell; the shell is provided with a main cavity and an induction cavity which are distributed at intervals along the up-down direction; the main controller is arranged in the main chamber; the free water detection module is at least partially arranged in the induction chamber, the free water detection module comprises an outer electrode, an inner electrode and a temperature sensing probe, the outer electrode and the inner electrode at least partially extend out of the induction chamber, the outer electrode is sleeved on the periphery of the inner electrode, the inner electrode and the outer electrode are coaxially arranged, an installation groove extending along the up-down direction is formed in the inner side wall of the induction chamber, the bottom wall of the installation groove is close to the outer electrode, and the temperature sensing probe is arranged in the installation groove. According to the technical scheme, the interference of the current between the inner electrode and the outer electrode on the temperature sensing probe can be reduced, and the detection result of the free water content in the oil liquid is improved.

Description

Oil free water detection sensor

Technical Field

The utility model relates to the technical field of sensors, in particular to an oil free water detection sensor.

Background

The increase in the moisture content of the lubricating oil in the equipment has the following effects: reducing the viscosity and oil film strength of the lubricating oil; affecting the formation of oil film, oxidizing oil, increasing oil sludge and deteriorating oil quality. Accelerating the corrosion of the organic acid to the metal; the additive is hydrolyzed to be disabled. Thus, the lubrication oil is monitored on-line for water content.

Current sensors for detecting the moisture content of lubricating oils are typically based on dielectric constant measurements of the moisture content of the oil. The principle of the method is based on that the change of the equivalent dielectric constant is caused by the fact that water is mixed in oil liquid, and the change of the equivalent dielectric constant is judged by measuring the capacitance, so that the content of the water is obtained. As disclosed in patent publication No. CN102012387a, a trace moisture sensor probe for lubricating oil is disclosed, the adopted detection mode is to detect the free water content in the oil by dielectric constant, but because the temperature sensing probe is arranged between the inner electrode and the outer electrode, the temperature measurement is inaccurate due to the current interference between the inner electrode and the outer electrode in the use process, the temperature compensation can not be effectively performed on the detection of dielectric constant, and the error is caused in the detection result of the free water content in the oil.

Disclosure of utility model

The utility model mainly aims to provide an oil free water detection sensor, which aims to reduce the interference of current between an inner electrode and an outer electrode on a temperature sensing probe and improve the detection result of the free water content in oil.

In order to achieve the above object, the present utility model provides an oil free water detection sensor, comprising:

The shell is provided with a main cavity and an induction cavity which are distributed at intervals along the up-down direction;

the main controller is arranged in the main chamber; and

The free water detection module is at least partially arranged in the induction chamber and comprises an outer electrode, an inner electrode and a temperature sensing probe, wherein the outer electrode and the inner electrode at least partially extend out of the induction chamber, the outer electrode is sleeved on the periphery of the inner electrode, the inner electrode and the outer electrode are coaxially arranged, an installation groove extending along the vertical direction is formed in the inner side wall of the induction chamber, the bottom wall of the installation groove is close to the outer electrode, and the temperature sensing probe is arranged in the installation groove.

Optionally, the outer electrode is a cylinder, and a plurality of flow holes are arranged on the side wall of the outer electrode, and the flow holes are distributed at intervals along the circumferential direction of the outer electrode.

Optionally, a plurality of flow holes are arranged on the side wall of the outer electrode, and the flow holes are arranged at intervals along the up-down direction.

Optionally, the outer electrode with the inner electrode is all located the outside of response cavity, fluid free water detects the sensor still includes insulating support piece, insulating support piece is located response cavity, and partial structure is followed upper and lower direction and is stretched out response cavity, be used for with the inner electrode is connected, the outer electrode with the outer end wall of response cavity is connected.

Optionally, a connecting hole is formed in one side, close to the insulating support, of the inner electrode, an inserting head is arranged at one end, close to the inner electrode, of the insulating support, and the inserting head is inserted into the connecting hole in an interference mode.

Optionally, a first sealing ring groove is formed in the outer side wall of the plug connector, a first sealing ring is arranged in the first sealing ring groove, and the first sealing ring is abutted against the hole side wall of the connecting hole by the groove bottom wall of the first sealing ring groove.

Optionally, the insulating support piece is provided with an avoidance through hole, the inner electrode is connected with the main controller through a first wire, and the first wire is arranged in the avoidance through hole.

Optionally, be equipped with the butt step on the inside wall of response cavity, the step face orientation of butt step the master controller sets up, insulating support piece for the butt step is equipped with the spacing ring and protruding, the notch of mounting groove set up in the step face of butt step, the spacing ring is protruding for the mounting groove is equipped with dodges the hole.

Optionally, the free water detection module further comprises an electric control board, the electric control board is arranged in the induction chamber and located on the end face, close to the main controller, of the limiting ring, and the outer electrode and the inner electrode are electrically connected with the main controller through the electric control board.

Optionally, the casing includes mutual threaded connection's response pipeline section and installation pipeline section, response pipeline section with the installation pipeline section encloses jointly and closes the response cavity, main cavity locates the installation pipeline section.

Optionally, the casing further includes an external thread cylinder, the external thread cylinder is located the induction pipe section is close to the one end of main cavity, just the section of thick bamboo diapire of external thread cylinder be in between the induction cavity with the main cavity is separated with the main cavity with the induction cavity, be equipped with on the induction pipe section with the screw thread of external thread cylinder is to the helicitic texture of adaptation, the external thread cylinder can be followed and be close to or keep away from the direction adjustment mounted position of outer electrode.

According to the technical scheme, the temperature sensing probe is arranged in the mounting groove, so that current between the inner electrode and the outer motor is not transmitted to the temperature sensing probe, and the work of the temperature sensing probe is prevented from being interfered. Meanwhile, as the temperature sensing probe is arranged close to the outer electrode, the temperature of oil between the inner electrode and the outer electrode can be accurately detected, and therefore, when the temperature sensing probe is arranged in the inner side wall of the sensing chamber, the temperature measurement accuracy of the temperature sensing probe cannot be affected.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an embodiment of the oil free water detection sensor of the present utility model.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides an oil free water detection sensor.

In the embodiment of the utility model, as shown in fig. 1, the oil free water detection sensor comprises:

A housing 10 provided with a main chamber 11 and an induction chamber 12 which are distributed at intervals in the up-down direction;

a main controller 20 provided in the main chamber 11; and

The free water detection module 30 is at least partially arranged in the induction chamber 12, the free water detection module 30 comprises an outer electrode 31, an inner electrode 32 and a temperature sensing probe 3333, the outer electrode 31 and the inner electrode 32 at least partially extend out of the induction chamber 12, the outer electrode 31 is sleeved on the periphery of the inner electrode 32, the inner electrode 32 and the outer electrode 31 are coaxially arranged, an installation groove 121 extending along the up-down direction is formed in the inner side wall of the induction chamber 12, the bottom wall of the installation groove 121 is arranged close to the outer electrode 31, and the temperature sensing probe 3333 is arranged in the installation groove 121.

According to the technical scheme of the utility model, the temperature sensing probe 33 is arranged in the mounting groove 121, so that current between the inner electrode 32 and the external motor is not transmitted to the temperature sensing probe 33, and the operation of the temperature sensing probe 33 is prevented from being interfered. Meanwhile, since the temperature sensing probe 33 is arranged close to the outer electrode 31, the temperature of the oil between the inner electrode 32 and the outer electrode 31 can be accurately detected, and therefore, when the temperature sensing probe 33 is arranged in the inner side wall of the sensing chamber 12, the temperature measurement accuracy of the temperature sensing probe 3333 is not affected.

Alternatively, the external electrode 31 is a cylinder, and a plurality of through holes 311 are provided on the sidewall of the external electrode 31, the plurality of through holes 311 are arranged at intervals along the circumferential direction of the external electrode 31, and the plurality of through holes 311 are arranged at intervals along the up-down direction. The oil flowing property in the gap between the inner electrode 32 and the outer electrode 31 is enhanced, so that the inner electrode 32 and the outer electrode 31 can contact more oil to be measured, and the accuracy of a measurement result is improved. In other embodiments, the plurality of through holes 311 may be arranged at intervals only in the circumferential direction of the external electrode 31, or may be arranged at intervals only in the up-down direction.

Optionally, the outer electrode 31 and the inner electrode 32 are both disposed at the outer side of the induction chamber 12, the oil free water detection sensor further includes an insulating support 34, the insulating support 34 is disposed in the induction chamber 12, and part of the structure extends out of the induction chamber 12 along the up-down direction, so as to be connected with the inner electrode 32, and the outer electrode 31 is connected with the outer end wall of the induction chamber 12. The insulating support 34 insulates the inner electrode 32 and the outer electrode 31 from each other, and at the same time, can serve to prevent oil from penetrating into the induction chamber 12. The inner electrode 32 and the outer electrode 31 are both arranged outside the induction chamber 12, so that the inner electrode 32 and the outer electrode 31 can be completely immersed into the oil to be detected, and the contact area with the oil to be detected is increased. In other embodiments, the outer electrode 31 and the inner electrode 32 may have a part of structures located in the sensing chamber 12, and the end surface of the sensing chamber 12 far away from the main controller 20 is provided with through holes corresponding to the inner electrode 32 and the outer electrode 31, so that the inner electrode 32 and the outer electrode 31 pass through the through holes and extend out of the sensing chamber 12.

Optionally, a connecting hole 321 is provided on a side of the inner electrode 32 near the insulating support 34, an insertion head 341 is provided on an end of the insulating support 34 near the inner electrode 32, and the insertion head 341 is inserted into the connecting hole 321 in an interference manner. The connecting structure is simple, and the inner electrode 32 is convenient to detach and replace. In other embodiments, it is also possible that the inner electrode 32 is screwed to the insulating support 34.

Optionally, the insulating support 34 is provided with a avoidance through hole 342, the inner electrode 32 is connected with the main controller 20 through a first wire 322, and the first wire 322 is disposed in the avoidance through hole 342. In other embodiments, it is also possible that a part of the structure of the insulating support 34, which part of the structure comprises at least the part of the structure connected to the inner electrode 32, is electrically conductive.

Optionally, a first sealing ring groove 341a is provided on the outer sidewall of the plug 341, a first sealing ring 341b is provided in the first sealing ring groove 341a, and the first sealing ring 341b is abutted by the groove bottom wall of the first sealing ring groove 341a and the hole sidewall of the connecting hole 321. The first sealing ring 341b can effectively prevent the oil from flowing through the gap between the insulating support 34 and the inner electrode 32, so that the oil can flow into the induction chamber 12 through the avoidance through hole 342. In other embodiments, it is also possible that the gap between the insulating support 34 and the inner electrode 32 is filled with a sealant.

Further alternatively, a second sealing ring 344 is disposed between the outer sidewall of the insulating support 34 and the inner sidewall of the induction chamber 12, a second sealing ring groove 343 is disposed on the outer sidewall of the insulating support 34 opposite to the second sealing ring 344, the second sealing ring 344 is abutted by the bottom wall of the second sealing ring groove 343 and the inner sidewall of the induction chamber 12, and the second sealing ring 344 is used for preventing oil from flowing into the gap between the induction chamber 12 and the insulating support 34 through the gap between the outer electrode 31 and the induction chamber 12, and then flowing into the induction chamber 12 and the main chamber 11. In other embodiments, it is also possible that the gap between the insulating support 34 and the induction chamber 12 is filled with a sealant.

Optionally, an abutment step 122 is disposed on an inner sidewall of the sensing chamber 12, a step surface of the abutment step 122 is disposed towards the main controller 20, the insulating support 34 is provided with a spacing ring protrusion 345 corresponding to the abutment step 122, a notch of the mounting groove 121 is opened on the step surface of the abutment step 122, and the spacing ring protrusion 345 is provided with an avoidance hole 345a corresponding to the mounting groove 121. I.e., the insulating support 34 is secured within the sensing chamber 12 by the abutting relationship between the stop collar 345 and the abutment step 122. And in order to take out the temperature sensing probe 33 in the mounting groove 121 more conveniently, the insulating support 34 and the inner electrode 32 do not need to be removed before taking out the temperature sensing probe 33, so that the operation process is complicated, and therefore, the limiting ring 345 is provided with the avoiding through hole 342 opposite to the mounting groove 121 so as to avoid taking and placing the temperature sensing probe 33 in the mounting groove 121, and meanwhile, the temperature sensing probe 33 and the main controller 20 are electrically connected through the second wire 331, and the avoiding through hole 342 can also avoid the second wire 331. In other embodiments, the abutment step 122 and the stop collar 345 are not provided, the inner side wall of the sensing chamber 12 and the outer side wall of the insulating support 34 are provided with corresponding screw structures 131, the insulating support 34 is fixed in the sensing chamber 12 by screwing, the mounting groove 121 is provided with a first groove section and a second groove section, the first groove section is communicated with the second groove section, the axis of the first groove section is intersected with the axis of the second groove section, the notch of the first groove section is arranged on the inner side wall of the sensing chamber 12, the temperature sensing probe 33 is arranged in the second groove section, and the groove bottom wall of the second groove section is arranged near the outer electrode 31.

0043 Optionally, the free water detecting module 30 further comprises an electric control board 40, the electric control board 40 is disposed in the sensing chamber 12 and located on an end surface of the limiting boss 345 near the main controller 20, and the outer electrode 31 and the inner electrode 32 are electrically connected with the main controller 20 through the electric control board 40. The electric control board 40 is connected with the inner electrode 32 and the outer electrode 31, performs preliminary formula calculation, feeds back the calculation result to the main controller 20, and then the main controller 20 performs a temperature compensation algorithm on the calculation result of the electric control board 40 through temperature data measured by the temperature sensing probe 33. In other embodiments, the free water detecting module 30 does not include the electric control board 40, and the outer electrode 31 and the inner electrode 32 are directly electrically connected to the main controller 20.

Optionally, the housing 10 includes a sensing tube section 13 and a mounting tube section 14 that are threadably connected to each other, the sensing tube section 13 and the mounting tube section 14 together enclosing a sensing chamber 12, and the main chamber 11 is provided in the mounting tube section 14. The oil free water detection sensor is convenient to assemble, and can be conveniently taken out of the main controller 20 in the main chamber 11 or the temperature sensing probe 33 in the sensing chamber 12, the electric control plate 40, the insulating support 34 and the inner electrode 32 connected with the insulating support 34 during maintenance. In other embodiments, the housing 10 enclosing the main chamber 11 and the sensing chamber 12 may be integrally formed.

Optionally, the casing 10 further includes an external thread cylinder 141, the external thread cylinder 141 is disposed at one end of the sensing pipe section 13 near the main chamber 11, and a cylinder bottom wall of the external thread cylinder 141 is disposed between the sensing chamber 12 and the main chamber 11 to separate the main chamber 11 from the sensing chamber 12, the sensing pipe section 13 is provided with a thread direction matching with the thread direction of the external thread cylinder 141, and the external thread cylinder 141 can adjust the installation position along a direction near or far from the external electrode 31. The external thread cylinder 141 and the limit ring boss 345 of the insulating support 34 together enclose the installation space of the electric control board 40, and the size of the installation space of the electric control board 40 can be adjusted by adjusting the distance between the external thread cylinder 141 and the limit ring boss 345. Meanwhile, the end face of the external thread cylinder 141, which is far away from the main controller 20, is abutted against the limiting ring boss 345, and the insulation support 34 can be abutted against the abutting step 122 of the induction chamber 12 by adjusting the distance between the external thread cylinder 141 and the limiting ring boss 345, so that the insulation support 34 is abutted against the first sealing ring 341b and the second sealing ring 344, and the sealing performance of the induction chamber 12 is enhanced. In other embodiments, the external thread cylinder 141 may be omitted.

Optionally, the oil free water detection sensor further includes an aviation plug 50, where the aviation plug 50 is disposed on an end surface of the mounting pipe section 14 away from the sensing pipe section 13. The aviation plug 50 has stable performance and good sealing performance, and when the oil free water detection sensor falls into oil carelessly, the oil cannot permeate into the aviation connector and damage electrical connectivity. Meanwhile, the aviation plug 50 is far away from the oil, so that the oil is further prevented from entering the aviation plug 50. In other embodiments, the aviation plug 50 may be provided on the side wall of the mounting tube section 14.

Optionally, the oil free water detection sensor further includes an alarm lamp 60, where the alarm lamp 60 is disposed on an end surface of the installation pipe section 14 far away from the induction pipe section 13, and the alarm lamp 60 can emit at least red light, yellow light and green light. The green light indicates that the oil is normal, the yellow light indicates that unexpected large variation of the physical parameters of the oil occurs or adjacent warning values, and the red light indicates that the physical parameters of the oil are in a warning range and the oil needs to be replaced. In other embodiments, the alarm lamp 60 can flash light, and the number of times of flashing light is used for early warning.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. An oil free water detection sensor, comprising:

The shell is provided with a main cavity and an induction cavity which are distributed at intervals along the up-down direction;

the main controller is arranged in the main chamber; and

The free water detection module is at least partially arranged in the induction chamber and comprises an outer electrode, an inner electrode and a temperature sensing probe, wherein the outer electrode and the inner electrode at least partially extend out of the induction chamber, the outer electrode is sleeved on the periphery of the inner electrode, the inner electrode and the outer electrode are coaxially arranged, an installation groove extending along the vertical direction is formed in the inner side wall of the induction chamber, the bottom wall of the installation groove is close to the outer electrode, and the temperature sensing probe is arranged in the installation groove.

2. The oil free water detection sensor according to claim 1, wherein the outer electrode is a cylinder, a plurality of flow holes are formed in the side wall of the outer electrode, and the flow holes are arranged at intervals along the circumferential direction of the outer electrode;

And/or, a plurality of flow holes are arranged on the side wall of the outer electrode, and the flow holes are distributed at intervals along the up-down direction.

3. The oil free water detection sensor according to claim 1, wherein the outer electrode and the inner electrode are both arranged on the outer side of the induction chamber, the oil free water detection sensor further comprises an insulating support member, the insulating support member is arranged in the induction chamber, part of the structure extends out of the induction chamber along the up-down direction and is used for being connected with the inner electrode, and the outer electrode is connected with the outer end wall of the induction chamber.

4. The oil free water detection sensor according to claim 3, wherein a connecting hole is formed in one side, close to the insulating support, of the inner electrode, and an insertion connector is arranged at one end, close to the inner electrode, of the insulating support, and is inserted into the connecting hole in an interference mode.

5. The oil free water detection sensor according to claim 3, wherein the insulating support member is provided with an avoidance through hole, the inner electrode is connected with the main controller through a first wire, and the first wire is arranged in the avoidance through hole.

6. The oil free water detection sensor according to claim 4, wherein a first sealing ring groove is formed in the outer side wall of the plug connector, a first sealing ring is arranged in the first sealing ring groove, and the first sealing ring is abutted against the bottom wall of the first sealing ring groove and the hole side wall of the connecting hole.

7. The oil free water detection sensor according to claim 3, wherein an abutting step is arranged on the inner side wall of the induction chamber, the step surface of the abutting step faces the main controller, the insulating support piece is provided with a limiting ring bulge relative to the abutting step, the notch of the mounting groove is formed in the step surface of the abutting step, and the limiting ring bulge is provided with an avoidance hole relative to the mounting groove.

8. The oil free water detection sensor according to claim 7, wherein the free water detection module further comprises an electric control plate, the electric control plate is arranged in the induction chamber and located on the end face, close to the main controller, of the limiting ring, and the outer electrode and the inner electrode are electrically connected with the main controller through the electric control plate.

9. The oil free water detection sensor as set forth in claim 1, wherein the housing includes a sensing tube section and a mounting tube section in threaded connection with each other, the sensing tube section and the mounting tube section together enclosing the sensing chamber, the main chamber being provided in the mounting tube section.

10. The oil free water detection sensor according to claim 9, wherein the housing further comprises an external thread cylinder, the external thread cylinder is arranged at one end of the induction pipe section close to the main chamber, a cylinder bottom wall of the external thread cylinder is arranged between the induction chamber and the main chamber to separate the main chamber from the induction chamber, a thread structure matched with a thread direction of the external thread cylinder is arranged on the induction pipe section, and the external thread cylinder can adjust the installation position along a direction close to or far away from the external electrode.