Waste grease collecting system for bearing and variable pitch bearing system

Abstract

The utility model relates to a waste grease collecting system for a bearing and a variable pitch bearing system, which are used for solving the technical problem that waste grease cannot be collected in the middle of a collecting hose positioned between two joints. The waste grease collecting system for the bearing comprises a waste grease collecting pipe and a waste grease collecting pipe, the waste grease collecting unit comprises a three-way connector, one connector of the three-way connector is used for being connected with a grease discharging opening of a bearing, and the other two connectors are used for being connected with waste grease collecting pipes respectively. The waste grease collecting pipe is connected between any two adjacent three-way joints; small exhaust holes are formed in the waste grease collecting pipe.

Description

Technical Field

[0001] The utility model relates to a waste grease collection system for bearings and a pitch bearing system. Background Art

[0002] For larger bearings, grease is generally used for lubrication inside. Taking the pitch bearing of a wind turbine as an example, multiple grease discharge ports are arranged around the pitch bearing for discharging waste grease. The traditional method of setting a collection bottle or a collection bag at each grease discharge port mainly has problems of easy detachment and cumbersome replacement.

[0003] Another technique is to set three-way or four-way joints at each grease discharge port and connect them in series with collection hoses, so that the waste grease flowing out of each grease discharge port is concentrated in the collection hose. For example, the technical solution disclosed in the authorized publication number CN216520867U. Although it reduces the replacement frequency, is more convenient to replace and is not easy to fall off, there is a new problem. Since the collection hose (oil collecting pipe) is connected between two adjacent joints (waste oil collection units), and there is a certain amount of air in the collection hose. When the waste grease enters the collection hose from the joints at both ends, the waste grease can only flow a short distance towards the middle of the collection hose and then cannot move. This is mainly because the air in the collection hose cannot be further compressed, which prevents the lubricating grease from moving towards the middle of the collection hose. This results in a very limited amount of waste grease that the entire collection system can collect. When it is not convenient for maintenance personnel to climb the wind turbine frequently for replacement, the waste grease will overflow and pollute the surrounding environment, and the failure to discharge the waste grease in the bearing in time will also cause certain damage to the bearing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste grease collection system for bearings to solve the technical problem that the middle part of the collection hose between two joints cannot collect waste grease; the purpose of the utility model is also to provide a pitch bearing system applying the above waste grease collection system for bearings.

[0005] The technical solution of the waste grease collection system for bearings of the utility model is as follows: The waste grease collection system for bearings includes:

[0006] A waste grease collection pipe for collecting and storing waste grease;

[0007] A waste grease collection unit including a three-way joint, one interface of the three-way joint is used to connect with the grease discharge port of the bearing, and the other two interfaces are respectively used to connect with the waste grease collection pipe;

[0008] The waste grease collection pipe is connected between any two adjacent three-way joints;

[0009] The waste grease collection pipe is provided with exhaust holes.

[0010] The beneficial effect of this solution is as follows: by arranging exhaust holes on the waste fat collection tube, while collecting waste fat, when the waste fat entering the waste fat collection tube squeezes the air in the tube, the air in the tube can be gradually discharged along the exhaust holes, so that the waste fat will not be hindered from filling the waste fat collection tube due to pressure buildup. This simple modification will not greatly change the original solution and can bring very high benefits, especially for this passive waste fat collection method. Since there is no special power drive, the waste fat has poor fluidity. If there is pressure buildup, it will greatly affect the effect of waste fat collection. The improvement of this application ensures that there is no more pressure buildup and the waste fat will flow more smoothly.

[0011] Furthermore, the exhaust hole is arranged in the middle of the waste fat collection pipe. Since the waste fat enters the waste fat collection pipe from both ends of the waste fat collection pipe simultaneously, the middle of the waste fat collection pipe is the last area to be filled. The exhaust hole is arranged here, so that the air in the pipe can be exhausted more thoroughly, and more waste fat can be filled in the pipe.

[0012] Furthermore, the exhaust hole is located at the upper part of the waste fat collection pipe. Due to the upward characteristics of gas, it is arranged at the upper part to ensure that the gas is discharged more thoroughly, especially for the air entrained in the waste fat, when the bubbles burst and overflow during the movement of the waste fat, it can also be smoothly discharged from the exhaust hole at the upper part, so that the waste fat collection pipe can collect more.

[0013] Furthermore, there are multiple exhaust holes, and the diameter of each exhaust hole is no more than 1 mm. The design of multiple small diameter holes ensures normal exhaust while minimizing the outflow of base oil in waste grease. The smaller the diameter of the exhaust hole, the less likely the base oil will flow out.

[0014] Furthermore, an exhaust port connecting the inside and the outside is provided on the upper part of the three-way joint. After the exhaust port is provided on the three-way joint, it is convenient not only to exhaust the original air inside the three-way joint, but also to exhaust the air wrapped in the waste fat and overflowing at the first time.

[0015] Furthermore, the exhaust channel corresponding to the exhaust port is an L-shaped channel. The L-shaped channel design will not affect the exhaust of gas, but will increase the resistance and difficulty of the waste fat flowing out, achieving the effect of air permeability but not fat permeability.

[0016] Furthermore, an exhaust hoop is provided on the waste grease collection pipe corresponding to the exhaust hole, and a gas channel connecting the inside and the outside is provided on the exhaust hoop, and the inner opening of the gas channel is connected to the exhaust hole. The exhaust hoop and the gas channel therein can increase the length of the exhaust path, which has no effect on the discharge of gas, but can limit the outflow of waste grease, especially when the waste grease collection pipe rotates with the bearing, the waste grease is not easily thrown out from the exhaust hole due to centrifugal force.

[0017] Furthermore, a tile-shaped protective block is pasted on the waste grease collection pipe corresponding to the exhaust small holes. A gas channel communicating inside and outside is provided on the protective block, and the inner port of the gas channel communicates with the exhaust small holes. The tile-shaped structure is simpler and lower in cost compared to the structure of the exhaust hoop.

[0018] Furthermore, a filter membrane that allows air to pass through but not oil is provided at the exhaust small holes. The setting of the filter membrane can play a filtering role, allowing the gas to be discharged while ensuring that the waste grease does not flow out. Because after the waste grease collection pipe is filled with waste grease, as the pressure increases, it is possible for the waste grease to break through the exhaust small holes and flow out. Especially when the waste grease collection pipe rotates with the pitch bearing and generates centrifugal force, it is also easy to cause the waste grease to be thrown out, which will lead to environmental pollution in the surrounding area. The existence of the filter membrane further prevents this problem from occurring.

[0019] Furthermore, a micro-float valve that allows air to pass through but not oil is provided at the exhaust small holes. Its function is basically the same as that of the filter membrane.

[0020] Furthermore, there are multiple exhaust small holes, which are evenly distributed along the length direction of the waste grease collection pipe. This setting can accelerate the discharge speed of the air inside the pipe and the air overflowing from the waste grease. However, at this time, the diameter of the exhaust small holes needs to be set smaller.

[0021] The technical solution of the pitch bearing system of the present utility model is as follows: It includes a pitch bearing and a waste grease collection system for the bearing installed on the pitch bearing. The waste grease collection system for the bearing includes:

[0022] A waste grease collection pipe for collecting and storing waste grease;

[0023] A waste grease collection unit, including a tee joint. One interface of the tee joint is used to connect to the grease discharge port of the bearing, and the other two interfaces are respectively used to connect to the waste grease collection pipe;

[0024] The waste grease collection pipe is connected between any two adjacent tee joints;

[0025] The waste grease collection pipe is provided with exhaust small holes.

[0026] The beneficial effect of this solution: By providing exhaust small holes on the waste grease collection pipe, when collecting waste grease, the air inside the pipe can gradually be discharged along the exhaust small holes when the waste grease entering the waste grease collection pipe squeezes the air inside the pipe, so that the waste grease collection pipe will not be blocked by pressure buildup. This simple modification will not cause major changes to the original solution, but can bring high benefits. Especially for this passive waste grease collection method, since there is no dedicated power drive, the waste grease has poor fluidity. If there is pressure buildup, it will greatly affect the waste grease collection effect. The improvement of this application ensures that there is no more pressure buildup, and the waste grease will flow more smoothly.

[0027] Furthermore, the exhaust hole is arranged in the middle of the waste fat collection pipe. Since the waste fat enters the waste fat collection pipe from both ends of the waste fat collection pipe simultaneously, the middle of the waste fat collection pipe is the last area to be filled. The exhaust hole is arranged here, so that the air in the pipe can be exhausted more thoroughly, and more waste fat can be filled in the pipe.

[0028] Furthermore, the exhaust hole is located at the upper part of the waste fat collection pipe. Due to the upward characteristics of gas, it is arranged at the upper part to ensure that the gas is discharged more thoroughly, especially for the air entrained in the waste fat, when the bubbles burst and overflow during the movement of the waste fat, it can also be smoothly discharged from the exhaust hole at the upper part, so that the waste fat collection pipe can collect more.

[0029] Furthermore, there are multiple exhaust holes, and the diameter of each exhaust hole is no more than 1 mm. The design of multiple small diameter holes ensures normal exhaust while minimizing the outflow of base oil in waste grease. The smaller the diameter of the exhaust hole, the less likely the base oil will flow out.

[0030] Furthermore, an exhaust port connecting the inside and the outside is provided on the upper part of the three-way joint. After the exhaust port is provided on the three-way joint, it is convenient not only to exhaust the original air inside the three-way joint, but also to exhaust the air wrapped in the waste fat and overflowing at the first time.

[0031] Furthermore, the exhaust channel corresponding to the exhaust port is an L-shaped channel. The L-shaped channel design does not affect the exhaust of gas, but increases the resistance and difficulty of the waste fat flowing out, achieving the effect of air permeability but not fat permeability.

[0032] Furthermore, an exhaust hoop is provided on the waste grease collection pipe corresponding to the exhaust hole, and a gas channel connecting the inside and the outside is provided on the exhaust hoop, and the inner opening of the gas channel is connected to the exhaust hole. The exhaust hoop and the gas channel therein can increase the length of the exhaust path, which has no effect on the discharge of gas, but can limit the outflow of waste grease, especially when the waste grease collection pipe rotates with the bearing, the waste grease is not easily thrown out from the exhaust hole due to centrifugal force.

[0033] Furthermore, a tile-shaped protective block is attached to the waste fat collection pipe corresponding to the exhaust hole, and a gas channel connecting the inside and the outside is provided on the protective block, and the inner opening of the gas channel is connected to the exhaust hole. Compared with the exhaust hoop structure, the tile-shaped structure is simpler and has lower cost.

[0034] Furthermore, a filter membrane that allows air to pass through but not oil is provided at the exhaust small hole. The filter membrane can play a filtering role, allowing gas to escape while ensuring that waste grease does not flow out. Because after the waste grease collection pipe is filled with waste grease, as the pressure increases, it may break through the exhaust small hole and flow out. Especially when the waste grease collection pipe rotates with the pitch bearing, centrifugal force is generated, which is also likely to cause the waste grease to be thrown out, resulting in environmental pollution around. The presence of the filter membrane further prevents this problem from occurring.

[0035] Furthermore, a micro-float valve that allows air to pass through but not oil is provided at the exhaust small hole. Its function is basically the same as that of the filter membrane.

[0036] Furthermore, there are multiple exhaust small holes, evenly distributed along the length direction of the waste grease collection pipe. This setting can accelerate the discharge speed of the air in the pipe and the air overflowing from the waste grease. However, in this case, the diameter of the exhaust small hole needs to be set smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the working state of the waste grease collection system of the prior art;

[0038] Figure 2 is a schematic structural diagram of Embodiment 1 of the waste grease collection system for bearings of the present invention;

[0039] Figure 3 is a schematic structural diagram of Embodiment 2 of the waste grease collection system for bearings of the present invention;

[0040] Figure 4 is Figure 3 the front view of the exhaust clamp in

[0041] Figure 5 is a schematic structural diagram of Embodiment 3 of the waste grease collection system for bearings of the present invention;

[0042] Figure 6 is a schematic structural diagram of Embodiment 4 of the waste grease collection system for bearings of the present invention;

[0043] Figure 7 is a schematic structural diagram of Embodiment 5 of the waste grease collection system for bearings of the present invention;

[0044] In the figure: 1 - pitch bearing, 11 - grease discharge port, 2 - tee joint, 21 - exhaust port, 22 - L-shaped channel, 3 - waste grease collection pipe, 31 - exhaust small hole, 4 - exhaust clamp, 5 - protective block, 6 - gas channel, 7 - filter membrane, 8 - micro-float valve, 9 - waste grease, 10 - air. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0047] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0048] The features and performance of the present utility model will be further described in detail below with reference to the embodiments.

[0049] Embodiment 1 of the waste grease collection system for bearings of the present utility model: As Figure 2 shown, the waste grease collection system for bearings is mainly used for collecting waste grease of bearings, and mainly includes multiple waste grease collection pipes 3 and multiple waste grease collection units, which are connected to each other in an alternating manner to form an annular structure and cover the corresponding bearings.

[0050] The waste grease collection pipe 3 is used to collect and store waste grease, and a plastic hose is adopted in this embodiment. The waste grease collection unit includes a tee joint 2. One interface of the tee joint 2 is used to connect with the grease discharge port 11 of the bearing, and the other two interfaces are respectively used to connect the waste grease collection pipe 3. The waste grease collection pipe 3 is connected between any two adjacent tee joints 2; an exhaust small hole 31 is provided on the waste grease collection pipe 3. By providing the exhaust small hole 31 on the waste grease collection pipe 3, when collecting waste grease, the air in the pipe can gradually be discharged along the exhaust small hole 31 when the waste grease entering the waste grease collection pipe 3 squeezes the air in the pipe, so that the waste grease collection pipe 3 will not be blocked by pressure buildup and the waste grease can fill the waste grease collection pipe 3. This simple modification will not cause major changes to the original solution, but can bring high benefits. Especially for this passive waste grease collection method, since there is no dedicated power drive, the waste grease has poor fluidity. If there is pressure buildup, it will greatly affect the waste grease collection effect. The improvement of this application ensures that there is no longer pressure buildup, and the waste grease will flow more smoothly.

[0051] The exhaust small hole 31 is provided in the middle of the waste grease collection pipe 3. Since the waste grease enters the waste grease collection pipe 3 synchronously from both ends of the waste grease collection pipe 3, the middle of the waste grease collection pipe 3 is the last area to be filled. By setting the exhaust small hole 31 here, the air in the pipe can be discharged more thoroughly, and more waste grease can be filled in the pipe. The exhaust small hole 31 is located in the upper part of the waste grease collection pipe 3. Due to the property of gas rising, setting it in the upper part can ensure that the gas is discharged more thoroughly. Especially for the air wrapped in the waste grease, when the bubbles burst and overflow during the movement of the waste grease, it can also be discharged smoothly from the upper exhaust small hole 31, so that the waste grease collection pipe 3 can be filled more fully.

[0052] In other embodiments, there are multiple exhaust small holes 31, and the diameter of each exhaust small hole 31 is not greater than 1 mm. The design of multiple small-diameter holes can ensure normal exhaust while minimizing the outflow of the base oil in the waste grease. The smaller the diameter of the exhaust small hole 31, the less likely the base oil is to flow out.

[0053] In other embodiments, there are multiple exhaust small holes 31, which are evenly distributed along the length direction of the waste grease collection pipe 3. This setting can accelerate the discharge speed of the air in the pipe and the air overflowing from the waste grease. However, at this time, the diameter of the exhaust small hole 31 needs to be set smaller.

[0054] Embodiment 2 of the waste grease collection system for bearings of the present utility model: As Figure 3 、 4As shown, the difference from Embodiment 1 is that an exhaust clamp 4 is provided on the waste grease collection pipe 3 corresponding to the exhaust small holes 31. A gas channel 6 communicating inside and outside is provided on the exhaust clamp 4, and the inner port of the gas channel 6 communicates with the exhaust small holes 31. The setting of the exhaust clamp 4 and the gas channel 6 therein can increase the length of the exhaust path, which has no impact on the discharge of gas, but can limit the outflow of waste grease. Especially when the waste grease collection pipe 3 rotates with the bearing, the waste grease is not easily thrown out from the exhaust small holes 31 due to centrifugal force.

[0055] Embodiment 3 of the waste grease collection system for bearings of the present utility model: As Figure 5 shown, the difference from Embodiment 1 is that a tile-shaped protection block 5 is pasted on the waste grease collection pipe 3 corresponding to the exhaust small holes 31. A gas channel 6 communicating inside and outside is provided on the protection block 5, and the inner port of the gas channel 6 communicates with the exhaust small holes 31. Compared with the structure of the exhaust clamp 4, the tile-shaped structure is simpler and has lower cost.

[0056] Embodiment 4 of the waste grease collection system for bearings of the present utility model: As Figure 6 shown, the difference from Embodiment 1 is that an exhaust port 21 communicating inside and outside is provided on the upper part of the tee joint 2. After the exhaust port 21 is provided on the tee joint 2, it is not only convenient to discharge the original air inside the tee joint 2, but also facilitates the discharge of the air entrained in the waste grease and overflowing in the first time. The exhaust channel corresponding to the exhaust port 21 is an L-shaped channel 22. The design of the L-shaped channel 22 does not affect the discharge of gas, but will increase the resistance and difficulty of the outflow of waste grease, achieving the effect of allowing air to pass through but not grease.

[0057] Embodiment 5 of the waste grease collection system for bearings of the present utility model: As Figure 7 shown, the difference from Embodiment 3 is that a filter membrane 7 that allows air to pass through but not oil is provided at the exhaust small holes 31. The setting of the filter membrane 7 can play a filtering role, allowing gas to be discharged but ensuring that the waste grease does not flow out. Because after the waste grease collection pipe 3 is filled with waste grease, as the pressure increases, it is possible to break through the exhaust small holes 31 and flow out. Especially when the waste grease collection pipe 3 rotates with the pitch bearing and generates centrifugal force, it is also easy to cause the waste grease to be thrown out, which will cause environmental pollution around. The presence of the filter membrane 7 further prevents this problem from occurring. A micro float valve 8 that allows air to pass through but not oil is provided at the exhaust small holes 31. Its function is basically the same as that of the filter membrane 7.

[0058] Specific embodiment of the pitch bearing system of the present utility model: The pitch bearing system includes a pitch bearing and a waste grease collection system. The structure of the waste grease collection system is the same as that of the waste grease collection system for bearings described above, and will not be elaborated here.

[0059] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. The scope of patent protection of the present utility model shall be subject to the claims. Any equivalent structural changes made by using the content of the specification and drawings of the present utility model shall similarly be included within the protection scope of the present utility model.

Claims

1. Waste grease collection system for bearings, comprising: Waste grease collection pipe for collecting and storing waste grease; Waste grease collection unit, including a tee joint, one interface of the tee joint is used to connect to the grease discharge port of the bearing, and the other two interfaces are respectively used to connect to the waste grease collection pipe; The waste grease collection pipe is connected between any two adjacent tee joints; It is characterized in that exhaust small holes are provided on the waste grease collection pipe.

2. The waste grease collection system for bearings according to claim 1, characterized in that, The exhaust small holes are arranged in the middle of the waste grease collection pipe.

3. The waste grease collection system for a bearing according to claim 1 or 2, characterized in that, The exhaust small holes are located in the upper part of the waste grease collection pipe.

4. The waste grease collection system for bearings according to claim 1, characterized in that, There are multiple exhaust small holes, and the diameter of each exhaust small hole is not greater than 1 mm.

5. The waste grease collection system for bearings according to claim 1, characterized in that, An exhaust port communicating inside and outside is provided at the upper part of the tee joint.

6. The waste grease collection system for a bearing according to claim 5, wherein, The exhaust channel corresponding to the exhaust port is an L-shaped channel.

7. The waste grease collection system for a bearing according to claim 1, wherein An exhaust clamp is provided on the waste grease collection pipe corresponding to the exhaust small holes, and a gas channel communicating inside and outside is provided on the exhaust clamp, and the inner port of the gas channel is communicated with the exhaust small holes.

8. The waste grease collection system for bearings according to claim 1, wherein, A tile-shaped protective block is pasted on the waste grease collection pipe corresponding to the exhaust small holes, and a gas channel communicating inside and outside is provided on the protective block, and the inner port of the gas channel is communicated with the exhaust small holes.

9. The waste grease collection system for bearings according to claim 1, characterized in that, A filter membrane that is breathable but not oil-permeable is provided at the exhaust small holes.

10. Pitch bearing system, including a pitch bearing and the waste grease collection system for bearings according to any one of claims 1-9, and the waste grease collection system for bearings is installed on the pitch bearing.

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