CN210738993U - Oil leak detection devices, hydraulic cylinders and wind turbines - Google Patents

Abstract

This application provides an oil leakage detection device, a hydraulic cylinder and a wind turbine generator set. The oil leakage detection device includes a detector, a collection box and a conduit; the collection box is provided with a first opening and a second opening relative to each other for allowing the cylinder rod of the hydraulic cylinder to pass through, and can be connected to the cylinder body and cylinder rod of the hydraulic cylinder respectively. Sealing fit; the collection box is provided with a leak hole, and the detector is connected to the leak hole through a conduit. The inner surface of the collection box, the first end surface of the cylinder body and the outer peripheral surface of the cylinder rod can enclose a cavity. When the oil in the cylinder leaks through the gap between the cylinder rod and the cylinder body, the leaked oil is collected in the cavity, and the oil in the cavity flows into the detector through the leak hole and conduit of the collection box. , when the detector senses the inflow of oil, it can promptly send prompt information to remind the staff that oil leakage has occurred in the hydraulic cylinder, so that the staff can take corresponding remedial measures as soon as possible to avoid larger losses.

Description

Oil leak detection devices, hydraulic cylinders and wind turbines

technical field

The present application relates to the technical field of leak detection devices, and in particular, to an oil leak detection device, a hydraulic oil cylinder and a wind turbine.

Background technique

Hydraulic cylinder is a commonly used component in the mechanical field, generally including a cylinder block and a cylinder rod. As shown in FIG. 1 , the first end face of the cylinder body is provided with an opening, and a part of the cylinder rod can be used to protrude out of the cylinder body through the opening to perform telescopic motion relative to the cylinder body.

There is a very small gap between the cylinder rod and the opening of the cylinder body, and a dynamic seal is usually provided at the gap to prevent the leakage of oil in the cylinder body. However, under some special working conditions, the oil in the cylinder will still leak out through this gap. When oil leakage occurs in the hydraulic cylinder, it will affect the working performance of the hydraulic cylinder and the system where it is located, resulting in greater losses.

In the prior art, it is usually impossible to detect whether oil leakage occurs in the hydraulic cylinder in time.

Utility model content

The purpose of the present application is to provide an oil leakage detection device, a hydraulic oil cylinder and a wind power generator set, so as to solve the technical problem that the prior art cannot timely detect whether oil leakage occurs in the hydraulic oil cylinder.

In a first aspect, an embodiment of the present application provides an oil leakage detection device, including a detector, a collection box and a conduit; the collection box is provided with a first opening and a second opening opposite to each other for the cylinder rod of the hydraulic cylinder to pass through. , and can be sealed and matched with the cylinder body and cylinder rod of the hydraulic oil cylinder respectively; the collection box is provided with a leakage hole, and the detector communicates with the leakage hole through a conduit.

In a second aspect, an embodiment of the present application provides a hydraulic oil cylinder, including a cylinder block, a cylinder rod, and the oil leakage detection device provided by the embodiment of the present application; the cylinder rod is penetrated through the first opening and the second opening of the collection box, The first opening is sealingly matched with the cylinder body, and the second opening is sealingly matched with the cylinder rod; the detector is arranged on the cylinder body or on a component outside the hydraulic cylinder, and the detector communicates with the leakage hole through a conduit.

In a third aspect, the embodiments of the present application provide a wind power generator set including the hydraulic oil cylinders provided by the embodiments of the present application.

Compared with the prior art, the utility model has the following beneficial technical effects:

When applying the oil leakage detection device provided by the embodiment of the present application, the collection box is connected to the cylinder body of the hydraulic oil cylinder, and the part of the cylinder rod of the hydraulic oil cylinder that protrudes from the cylinder body passes through the first opening and the second opening of the collection box in sequence. Two openings, the cylinder rod can do telescopic movement relative to the cylinder body and the collection box. The edge of the first opening is in sealing fit with the first end face of the cylinder body; the edge of the second opening is in sealing fit with the part of the cylinder rod protruding from the cylinder body. Therefore, the inner surface of the collection box, the first end surface of the cylinder body and the outer peripheral surface of the cylinder rod can be enclosed to form a cavity.

When the oil in the cylinder leaks through the gap between the cylinder rod and the cylinder, the leaked oil is collected in the cavity, and the oil in the cavity flows into the detector through the leakage hole and the conduit of the collection box in turn. , the detector can send prompt information in time when it senses the inflow of oil, prompting the staff that oil leakage has occurred in the hydraulic cylinder.

The oil leakage detection device provided by the embodiment of the present application can timely detect oil leakage in the hydraulic cylinder, and send prompt information to the staff, so that the staff can take corresponding remedial measures as soon as possible to avoid large losses.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present application.

Fig. 1 is the structural representation of a kind of existing hydraulic oil cylinder;

2 is a schematic structural diagram of a hydraulic oil cylinder provided by an embodiment of the present application, including an oil leakage detection device;

Fig. 3 is the sectional view of Fig. 2 provided by the embodiment of the present application, and the sectional plane passes through the axis of the cylinder rod;

4 is a schematic cross-sectional view of the assembly of the collection box and the sealing ring in FIG. 2 according to an embodiment of the present application;

5 is a schematic structural diagram of the collection box in FIG. 2 provided by an embodiment of the present application;

6 is a schematic cross-sectional view of the structure of another collection box provided by an embodiment of the present application;

7 is a schematic structural diagram of a gasket provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of the position of a hydraulic oil cylinder in an impeller provided by an embodiment of the present application.

The reference numerals are explained as follows:

1-detector; 11-leakage sensor;

2- Collection box;

201-first opening; 202-second opening;

21-pipe body; 211-leakage hole; 212-vent hole;

22 - the first ring;

23-the second ring; 231-connection hole;

3 - catheter;

4- sealing ring;

5- Gasket;

51-via hole; 52-avoidance hole;

6-Cylinder block;

61-first end face; 62-threaded hole;

7- cylinder rod;

100 - cavity.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of stated features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features , integers, steps, operations, elements, components and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in a general dictionary, should be understood to have meanings consistent with their meanings in the context of the prior art and, unless specifically defined as herein, should not be interpreted in idealistic or overly formal meaning to explain.

As shown in FIG. 1 , an existing hydraulic cylinder generally includes a cylinder block 6 and a cylinder rod 7 . As shown in FIG. 1 , the first end surface 61 of the cylinder block 6 is provided with an opening, and a part of the cylinder rod 7 can be used to protrude out of the cylinder block 6 through the opening to perform telescopic motion relative to the cylinder block. The cylinder rod 7 and the cylinder block There is an extremely small gap L between the openings of 6 . The inventor of the present application found that, in general, the dynamic seal provided at the gap L in the hydraulic cylinder can play a role in preventing oil leakage. However, under some special working conditions, the oil in the cylinder block 6 will still leak out through the gap L. For example, for the hydraulic cylinder applied in the pitch system of the wind turbine, when the hydraulic cylinder is under a larger load, a larger vibration or is in a rotating state, the hydraulic cylinder will have a higher risk of oil leakage . However, it is usually impossible to detect whether oil leakage occurs in the hydraulic cylinder in time by relying on the existing technology.

Based on the above reasons, an embodiment of the present application provides an oil leakage detection device, taking FIG. 2 to FIG. 4 as an example, including a detector 1 , a collection box 2 and a conduit 3 . The collection box 2 is provided with a first opening 201 and a second opening 202, which are used for the cylinder rod 7 of the hydraulic cylinder to pass through, and can be sealed with the cylinder block 6 and the cylinder rod 7 of the hydraulic cylinder, respectively. The collection box 2 is provided with a leak hole 211 , and the detector 1 communicates with the leak hole 211 through the conduit 3 .

When applying the oil leakage detection device provided by the embodiment of the present application, the collection box 2 is connected to the cylinder block 6 of the hydraulic cylinder, and the part of the cylinder rod 7 of the hydraulic cylinder protruding from the cylinder block 6 passes through the cylinder block 6 of the collection box 2 in sequence. With the first opening 201 and the second opening 202 , the cylinder rod 7 can perform telescopic movement relative to the cylinder block 6 and the collection box 2 . The edge of the first opening 201 is in sealing fit with the first end surface 61 of the cylinder body 6 ; the edge of the second opening 202 is in sealing fit with the part of the cylinder rod 7 protruding from the cylinder body 6 . Therefore, the inner surface of the collection box 2 , the first end surface 61 of the cylinder block 6 and the outer peripheral surface of the cylinder rod 7 can enclose a cavity 100 .

When the oil in the cylinder 6 leaks through the gap between the cylinder rod 7 and the cylinder 6, the leaked oil is collected in the cavity 100, and the oil in the cavity 100 passes through the leakage of the collection box 2 in turn. The hole 211 and the conduit 3 flow into the detector 1, and the detector 1 can send a prompt message in time when the detector 1 senses the inflow of oil, indicating to the staff that oil leakage has occurred in the hydraulic cylinder.

The oil leakage detection device provided by the embodiment of the present application can timely detect oil leakage in the hydraulic cylinder, and send prompt information to the staff, so that the staff can take corresponding remedial measures as soon as possible to avoid large losses.

It should be noted that, for a single-rod hydraulic cylinder, one of the end faces of the cylinder block 6 is a first end face 61, and the first end face 61 is provided with an opening. A portion near one end of the cylinder rod 7 protrudes out of the cylinder block 6 through this opening. A single-rod hydraulic cylinder is equipped with an oil leak detection device.

For the double-rod hydraulic cylinder, the two end faces of the cylinder block 6 are first end faces 61, and each first end face 61 is provided with an opening. The parts of the cylinder rod 7 near the two ends protrude out of the cylinder block 6 through two openings respectively. A double-rod hydraulic cylinder is equipped with two oil leakage detection devices.

In an embodiment of the present application, as shown in FIG. 4 and FIG. 5 , the collection box 2 includes a tube body 21 and a first annular member 22 , and the tube body 21 is cylindrical. One orifice of the pipe body 21 is the first opening 201 , which is used for sealingly fitting with the cylinder body 6 . The edge of the other orifice of the pipe body 21 is connected with the outer edge of the first annular member 22 , and the inner hole of the first annular member 22 is the second opening 202 for sealingly fitting with the cylinder rod 7 .

The radial dimension of the inner hole of the first ring member 22 is slightly larger than the radial dimension of the portion of the cylinder rod 7 protruding from the cylinder body 6 to ensure that the cylinder rod 7 can perform telescopic movement relative to the collection box 2 . In order to avoid leakage of the oil collected in the cavity 100 from the gap between the second opening 202 and the cylinder rod 7 as much as possible. In an embodiment of the present application, as shown in FIGS. 3 and 4 , the oil leakage detection device further includes a sealing ring 4 , and the sealing ring 4 is arranged between the second opening 202 and the cylinder rod 7 . The sealing ring 4 can effectively prevent the oil collected in the cavity 100 from leaking from the gap between the second opening 202 and the cylinder rod 7 .

Optionally, in FIG. 3 , the sealing ring 4 is arranged in the gap between the inner hole of the first annular member 22 and the cylinder rod 7 , and the sealing ring 4 may be a dynamic seal.

Optionally, the sealing ring 4 can be made of rubber or other materials capable of sealing.

In an embodiment of the present application, as shown in FIG. 6 , the collection box 2 includes a pipe body 21 , and the pipe body 21 is tapered. In the pipe body 21 , the orifice with the larger inner diameter is the first opening 201 , and the orifice with the smaller inner diameter is the second opening 202 .

The radial dimension of the orifice with the smaller inner diameter in the tapered pipe body 21 is slightly larger than the radial dimension of the part of the cylinder rod 7 protruding from the cylinder block 6 to ensure that the cylinder rod 7 can perform telescopic motion relative to the collection box 2 . In order to avoid leakage of the oil collected in the cavity 100 from the gap between the nozzle with a smaller inner diameter in the pipe body 21 and the cylinder rod 7 as much as possible. In an embodiment of the present application, the oil leakage detection device further includes a sealing ring 4 , and the sealing ring 4 is arranged between the second opening 202 and the cylinder rod 7 .

Optionally, the sealing ring 4 is arranged in the gap between the nozzle with a smaller inner diameter in the pipe body 21 and the cylinder rod 7 , and the sealing ring 4 may be a dynamic seal.

In an embodiment of the present application, as shown in FIG. 6 , the leakage hole 211 is provided on the pipe body 21 .

Optionally, the number of leakage holes 211 may be one or at least two. As shown in the figure, the pipe body 21 is provided with three leakage holes 211 , and each leakage hole 211 is connected with a conduit 3 .

In an embodiment of the present application, as shown in FIG. 5 , the pipe body 21 is provided with a ventilation hole 212 . The vent hole 212 can ensure that the cavity 100 for collecting oil is communicated with the outside atmosphere, which helps the oil in the cavity 100 to flow out through the leakage hole 211 .

In an embodiment of the present application, as shown in FIGS. 2 to 4 , the collection box 2 further includes a second annular member 23 for connecting with the first end surface 61 of the cylinder block 6 . The second ring member 23 is provided with a connecting hole 231 . The edge of the first opening 201 is connected with the inner edge of the second ring member 23 .

Optionally, as shown in FIG. 3 , the first end surface 61 of the cylinder block 6 may be provided with threaded holes 62 . The second ring member 23 is in contact with the first end face 61 of the cylinder block 6 , so that each connecting hole 231 on the second ring member 23 corresponds to a threaded hole 62 on the first end face 61 of the cylinder block 6 . After passing through the connecting hole 231 , it is screwed into the threaded hole 62 , so that the collecting box 2 is connected to the cylinder block 6 .

In an embodiment of the present application, as shown in FIG. 3 , the oil leakage detection device further includes a gasket 5 , and the gasket 5 is arranged between the second annular member 23 and the first end surface 61 of the cylinder block 6 .

The gasket 5 can be more closely attached to the second ring member 23 and the first end surface 61 of the cylinder block 6 to prevent oil from leaking through the gap between the second ring member 23 and the first end surface 61 of the cylinder block 6 .

Optionally, as shown in FIG. 7 , the gasket 5 is provided with a through hole 51 for the cylinder rod 7 of the hydraulic cylinder to pass through, and an escape hole 52 corresponding to the connection hole 231 of the second annular member 23 .

Optionally, the gasket 5 can be made of rubber or other materials capable of sealing.

In one embodiment of the present application, the inner surface of the collection box 2 is coated with an oleophobic layer. The oleophobic layer can prevent the oil from adhering to the inner surface of the collection box 2, so that the oil leaked from the hydraulic cylinder can flow into the detector 1 in time, improve the accuracy of the detection results, and effectively avoid missed detection.

In one embodiment of the present application, as shown in FIGS. 2 and 3 , the detector 1 includes a controller (not shown in the figures) electrically connected and a leak sensor 11 , and the leak sensor 11 is used for connecting with one port of the conduit 3 Connected.

After the oil flows into the leakage sensor 11, the parameters output by the leakage sensor 11 (such as current value, voltage value, resistance value or frequency of the transmitted signal, etc.) will change, and the controller determines that the hydraulic cylinder has generated oil according to the change of the parameters. In case of leakage, prompt information will be sent in a timely manner.

For example, the leak sensor 11 may be an oil-immersed leak sensor 11 , and the oil flowing into the oil-immersed leak sensor 11 will cause the resistance value inside the oil-immersed leak sensor 11 to change.

Optionally, a wired connection or a wireless connection may be made between the controller and the leak sensor 11 .

Based on the same utility model concept, an embodiment of the present application also provides a hydraulic oil cylinder, taking FIGS. 2 to 4 as an example, including a cylinder block 6 , a cylinder rod 7 , and the oil leakage detection device provided by the embodiment of the present application. The cylinder rod 7 passes through the first opening 201 and the second opening 202 of the collection box 2 . The detector 1 is arranged on the cylinder block 6 or a component other than the hydraulic cylinder, and the detector 1 communicates with the leakage hole 211 through the conduit 3 .

In FIG. 3 , the collection box 2 is connected to the first end face 61 of the cylinder block 6 of the hydraulic oil cylinder, and the part of the cylinder rod 7 of the hydraulic oil cylinder that protrudes from the cylinder block 6 passes through the first opening 201 of the collection box 2 and In the second opening 202 , the cylinder rod 7 can perform telescopic movement relative to the cylinder block 6 and the collection box 2 . The edge of the first opening 201 is in sealing fit with the first end surface 61 of the cylinder body 6 ; the edge of the second opening 202 is in sealing fit with the part of the cylinder rod 7 protruding from the cylinder body 6 . Therefore, the inner surface of the collection box 2 , the first end surface 61 of the cylinder block 6 and the outer peripheral surface of the cylinder rod 7 can enclose a cavity 100 .

In FIG. 2, the detector 1 is connected to the cylinder block 6 of the hydraulic ram.

Optionally, the detector 1 should be as close to the collection box 2 as possible to shorten the oil transport path and improve the detection efficiency and accuracy.

Optionally, the detector 1 can also be connected to other components than the hydraulic cylinder.

It should be noted that the hydraulic cylinder shown in Figures 2 and 3 is a single-rod hydraulic cylinder, and one of the end faces of the cylinder block 6 is a first end face 61, and the first end face 61 is provided with an opening. A portion near one end of the cylinder rod 7 protrudes out of the cylinder block 6 through this opening. A single-rod hydraulic cylinder is equipped with an oil leak detection device.

Those skilled in the art can understand that the hydraulic cylinder provided in the embodiment of the present application may also be a double-rod hydraulic cylinder, both end faces of the cylinder block 6 are first end faces 61 , and each first end face 61 is provided with an opening. The parts of the cylinder rod 7 near the two ends protrude out of the cylinder block 6 through two openings respectively. A double-rod hydraulic cylinder is equipped with two oil leakage detection devices.

In an embodiment of the present application, as shown in FIG. 3 , the cylinder rod 7 passes through the first end surface 61 of the cylinder body 6 , and the second annular member 23 of the collection box 2 is attached to and connected to the first end surface 61 .

Optionally, the first end surface 61 of the cylinder block 6 may be provided with threaded holes 62 . The second ring member 23 is in contact with the first end face 61 of the cylinder block 6 , so that each connecting hole 231 on the second ring member 23 corresponds to a threaded hole 62 on the first end face 61 of the cylinder block 6 . After passing through the connecting hole 231 , it is screwed into the threaded hole 62 , so that the collecting box 2 is connected to the cylinder block 6 .

In an embodiment of the present application, as shown in FIG. 3 , a gasket 5 is provided between the second annular member 23 and the first end surface 61 of the cylinder block 6 . The gasket 5 can be more closely attached to the second ring member 23 and the first end surface 61 of the cylinder block 6 to prevent oil from leaking through the gap between the second ring member 23 and the first end surface 61 of the cylinder block 6 .

Optionally, as shown in FIG. 7 , the gasket 5 is provided with a through hole 51 for the cylinder rod 7 of the hydraulic cylinder to pass through, and an escape hole 52 corresponding to the connection hole 231 of the second annular member 23 .

Optionally, the gasket 5 can be made of rubber or other materials capable of sealing.

In an embodiment of the present application, as shown in FIG. 3 , a sealing ring 4 is provided between the second opening 202 of the collection box 2 and the cylinder rod 7 . The sealing ring 4 can effectively prevent the oil collected in the cavity 100 from leaking from the gap between the second opening 202 and the cylinder rod 7 .

Optionally, in FIG. 3 , the sealing ring 4 is arranged in the gap between the inner hole of the first annular member 22 and the cylinder rod 7 , and the sealing ring 4 may be a dynamic seal.

Optionally, the sealing ring 4 can be made of rubber or other materials capable of sealing.

Based on the same concept of the utility model, the embodiments of the present application further provide a wind power generator set, including the hydraulic oil cylinder provided by the embodiments of the present application.

In one embodiment of the present application, the hydraulic oil cylinder is a rotating part, and the leakage hole 211 is arranged at the position directed by the centrifugal force of the collection box 2 or in the vicinity of the position.

It should be noted that, in the embodiments of the present application, if the hydraulic cylinder is a rotating component, it means that the hydraulic cylinder can revolve, that is, rotate around a rotation center other than the hydraulic cylinder, and does not mean that the hydraulic cylinder rotates on its own.

Optionally, the hydraulic oil cylinder disposed on the impeller is a rotating component, such as a hydraulic oil cylinder used in a pitch system, and the hydraulic oil cylinder can rotate around the rotation center of the impeller. In FIG. 8 , the symbol A represents the impeller, and the symbol B represents the hydraulic cylinder provided by the embodiment of the present application. When the hydraulic oil cylinder rotates with the impeller, centrifugal force is generated, and the leakage hole 211 is set at the position directed by the centrifugal force or in the vicinity of the position. Under the action of centrifugal force, the oil leaked from the cylinder block 6 flows to the leakage hole 211 , and then flows into the detector 1 through the conduit 3 .

In one embodiment of the present application, the hydraulic cylinder is a non-rotating component, and the leakage hole 211 is arranged at or near the position directed by the gravity of the collection box 2 .

Optionally, the hydraulic cylinder provided in the nacelle or the tower is a non-rotating component, such as a hydraulic cylinder used in a locking pin device. Under the action of gravity, the oil leaked from the cylinder block 6 flows to the leakage hole 211 , and then flows into the detector 1 through the conduit 3 .

The application of the embodiment of the present application has at least the following technical effects:

1. When the oil leakage detection device provided in the embodiment of the present application is applied, the inner surface of the collection box, the first end surface of the cylinder block and the outer peripheral surface of the cylinder rod can enclose a cavity. When the oil in the cylinder leaks through the gap between the cylinder rod and the cylinder, the leaked oil is collected in the cavity, and the oil in the cavity flows into the detector through the leakage hole and the conduit of the collection box in turn. , the detector can send a prompt message in time when it senses the inflow of oil, reminding the staff that oil leakage has occurred in the hydraulic cylinder, so that the staff can take corresponding remedial measures as soon as possible to avoid large losses.

2. In the oil leakage detection device provided in the embodiment of the present application, the sealing ring can be arranged between the second opening and the cylinder rod, effectively preventing the oil collected in the cavity from leaking from the second opening and the cylinder rod. Gap leaks.

3. In the oil leakage detection device provided in the embodiment of the present application, a sealing gasket is provided between the second annular member and the first end surface of the cylinder block. The sealing gasket can fit more closely with the second annular member and the first end surface of the cylinder body, so as to prevent the oil from leaking through the gap between the second annular member and the first end surface of the cylinder body.

4. In the oil leakage detection device provided by the embodiment of the present application, the pipe body is provided with a vent hole. The vent hole can ensure that the cavity for collecting oil is communicated with the outside atmosphere, which helps the oil in the cavity to flow out through the leakage hole.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the description of this specification, the particular features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above are only part of the embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the principles of the present application, several improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (10)

1. The oil leakage detection device is characterized by comprising a detector (1), a collection box (2) and a guide pipe (3);

the collecting box (2) is provided with a first opening (201) and a second opening (202) which are opposite to each other, is used for a cylinder rod (7) of a hydraulic oil cylinder to penetrate through, and can be respectively in sealing fit with a cylinder body (6) and a cylinder rod (7) of the hydraulic oil cylinder;

the collection box (2) is provided with a leakage hole (211), and the detector (1) is communicated with the leakage hole (211) through the conduit (3).

2. The oil leak detection device according to claim 1, comprising at least one of:

the collecting box (2) comprises a pipe body (21) and a first annular piece (22), wherein the pipe body (21) is cylindrical; one pipe orifice of the pipe body (21) is the first opening (201) and is used for being matched with the cylinder body (6) in a sealing way; the edge of the other nozzle of the pipe body (21) is connected with the outer edge of the first annular member (22), and the inner hole of the first annular member (22) is the second opening (202) and is used for being in sealing fit with the cylinder rod (7);

the collecting box (2) comprises a pipe body (21), and the pipe body (21) is conical; the pipe orifice with the larger inner diameter in the pipe body (21) is the first opening (201), and the pipe orifice with the smaller inner diameter is the second opening (202).

3. The oil leak detection device according to claim 2, wherein the collecting box (2) further comprises a second ring member (23) for connection with the first end surface (61) of the cylinder block (6);

the second ring-shaped member (23) is provided with a connecting hole (231); the edge of the first opening (201) is connected with the inner edge of the second ring member (23).

4. The oil leakage detecting device according to claim 3, further comprising a gasket (5), wherein the gasket (5) is adapted to be disposed between the second ring member (23) and the first end surface (61) of the cylinder block (6).

5. The oil leakage detecting device according to claim 2, wherein the leakage hole (211) is provided in the pipe body (21);

and/or the pipe body (21) is provided with a vent hole (212).

6. The oil leakage detection device according to claim 1, further comprising a seal ring (4), wherein the seal ring (4) is provided between the second opening (202) and the cylinder rod (7).

7. The oil leak detection device according to claim 1, comprising at least one of:

the inner surface of the collecting box (2) is coated with an oil-thinning layer;

the detector (1) comprises an electrically connected controller and a leak sensor (11), the leak sensor (11) being adapted to communicate with a port of the conduit (3).

8. A hydraulic cylinder characterized by comprising a cylinder body (6), a cylinder rod (7), and the oil leakage detecting device according to any one of claims 1 to 7;

the cylinder rod (7) penetrates through a first opening (201) and a second opening (202) of the collecting box (2), the first opening (201) is in sealing fit with the cylinder body (6), and the second opening (202) is in sealing fit with the cylinder rod (7);

the detector (1) is arranged on the cylinder body (6) or on a component outside the hydraulic oil cylinder, and the detector (1) is communicated with the leakage hole (211) through the guide pipe (3).

9. A wind power plant comprising a hydraulic ram according to claim 8.

10. Wind park according to claim 9, comprising at least one of:

the hydraulic oil cylinder is a rotating part, and the leakage hole (211) is arranged at or near the position to which the centrifugal force of the collecting box (2) points;

the hydraulic oil cylinder is a non-rotating component, and the leakage hole (211) is arranged at or near the position pointed by the gravity of the collecting box (2).

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