CN209782199U - Grease distribution system of bearing and become oar bearing - Google Patents

Abstract

The utility model provides a grease distribution system and the change oar bearing of bearing. The grease dispensing system includes: the first interface of each tee joint is communicated with an oil filling port of the bearing; and the connecting pipes connect the second joints and the third joints of the adjacent tee joints with each other to form an outer loop communicated with the oil filling opening. According to the utility model discloses, can provide an outside loop for the grease in the bearing (especially change oar bearing), utilize the pressure differential of the inside grease of bearing to be the power supply, make the grease flow direction low-pressure area of high nip, improve the grease mobility in the bearing, carry out the redistribution to the grease in the bearing, ensure that the grease in the bearing is more even.

Description

Grease distribution system of bearing and become oar bearing

Technical Field

The utility model relates to a wind power generation technical field specifically, relates to a grease distribution system and the change oar bearing of bearing.

Background

In a mechanical device equipped with a bearing, it is generally necessary to perform regular maintenance of the bearing, and grease is injected into a raceway or a slideway between inner and outer rings of the bearing to ensure reliability of the service performance of the bearing. Due to the operation difference of maintainers, the metering precision of grease amount and other reasons, the problems of inaccurate grease adding amount of the bearing and uneven grease adding inside can occur.

for example, in a wind generating set, a pitch bearing is one of key components of the wind generating set, the pitch bearing can adjust the windward angle of a blade according to the wind power level, control of the output power of the blade and guarantee of the safety of the blade are achieved, and the reliability and the stability of the wind generating set are directly determined by the use performance of the pitch bearing.

Therefore, the pitch bearing needs to be regularly maintained, and lubricating grease is injected into a roller path between an inner ring and an outer ring of the pitch bearing to ensure the reliability of the service performance of the pitch bearing.

When a unit is overhauled, in the process of filling lubricating grease into a variable-pitch bearing, the problems of inaccurate grease adding amount of the bearing and uneven grease adding inside can occur due to operation differences of maintainers, grease metering precision and other reasons.

Because the rotation angle of the variable-pitch bearing is about 90 degrees instead of 360 degrees in the whole circumference, the variable-pitch bearing intermittently rotates in the small-angle range, the stirring range of internal grease by internal components (such as rolling bodies and isolating blocks) of the bearing is small, the flow path of the grease is short, the grease cannot flow in the whole circumference of the raceway, and the fluidity is poor. Therefore, if the local greasing amount of the variable-pitch bearing is excessive or insufficient, the part with excessive grease can still be excessive (gathered) during the operation of the bearing in a short time, the local pressure is higher than the tolerance pressure of the sealing ring, and the grease can leak from the sealing ring; on the contrary, the part lacking the grease amount is still insufficient, the grease at the excessive part may not flow to the part lacking the grease, and the phenomenon of poor lubrication of the variable-pitch bearing is generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thereby can carry out the grease distribution system and the change oar bearing of the even bearing of grease in the bearing of assurance bearing of redistribution to the grease in the bearing (especially change the oar bearing).

According to an aspect of the utility model, a grease distribution system of bearing is provided, include: the first interface of each tee joint is communicated with an oil filling port of the bearing; and the connecting pipes connect the second joints and the third joints of the adjacent tee joints with each other to form an outer loop communicated with the oil filling opening.

Alternatively, a plurality of tee joints may be in one-to-one correspondence with the oil injection ports.

Alternatively, the first port may be directly connected to the oil filling port.

Optionally, the grease dispensing system may further comprise a plurality of grease cups, each of which may have inflow and outflow passages, one end of each of which may be adapted to connect with a grease inlet, and the other end of each of which may connect with the first port of the tee joint.

Alternatively, the oil cup may include a nipple provided at the other end thereof, and the first port may include a first pipe member, and an end of the first pipe member may be provided with an insertion hole corresponding to a shape of the nipple, into which the nipple is inserted.

Alternatively, the insertion hole may have a bracket shape corresponding to the oil nipple.

Alternatively, the first pipe member may be formed with an enlarged portion at a position corresponding to the insertion hole, and the enlarged portion may have a diameter larger than that of other portions of the first pipe member.

Optionally, the first interface may further comprise a fixture secured to the oil cup.

Optionally, the fixing member may include a first fastening member fitted over the first pipe member, and the oil cup may further include a first threaded portion that may be disposed below the oil nipple and engaged with the first fastening member.

Alternatively, each of the connection pipes may include a metal pipe directly connected to the second and third ports and a hose connecting the metal pipes adjacent to each other.

Alternatively, the second and third ports may be ferrule type fittings, the oil cup may be formed using 45# steel, and the inflow and outflow passages may be through holes that extend through the oil cup.

Optionally, the oil cup may further include a second threaded portion provided at one end of the oil cup and adapted to be connected to the oil filling port.

According to another aspect of the present invention, there is provided a pitch bearing comprising a grease distribution system.

According to the utility model discloses, through utilizing tee bend and connecting pipe to form the outside loop of intercommunication oiling mouth, can provide an outside loop for the grease that becomes in the oar bearing, utilize the pressure differential that becomes the inside grease of oar bearing to be the power supply, make the grease flow direction low-pressure area of high nip, improved the grease mobility in the oar bearing of becoming, carry out the redistribution to the grease in the oar bearing of becoming, ensure that the grease in the oar bearing is more even.

According to the utility model discloses, design the first joint of tee bend according to the glib talker of oil cup, consequently can guarantee the leakproofness of oil cup and first articulate and the fastness of being connected.

According to the utility model discloses, compare with prior art's oil cup, through the cup that omits the check valve structure in the oil cup, increases the oil inlet and the oil-out of oil cup, utilizes high strength material to make the oil cup, consequently can improve the grease velocity of flow of oil cup and the resistance to pressure of oil cup, make it be applicable to quick currying instrument.

Drawings

The above and other objects and advantages of the present invention will become more apparent and readily appreciated from the following detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic view of a pitch bearing provided with a grease distribution system according to an embodiment of the present invention;

Fig. 2 is a schematic view of a portion of a pitch bearing provided with a grease distribution system according to an embodiment of the invention;

Fig. 3 is a schematic view of an installation state of an oil cup and a tee according to an embodiment of the present invention;

Fig. 4 is a partial sectional view of an installation state of an oil cup and a tee according to an embodiment of the present invention;

Fig. 5 is an exploded perspective view of an oil cup and tee according to an embodiment of the present invention;

fig. 6 is a perspective view of an oil cup of a grease dispensing system according to an embodiment of the invention;

FIG. 7 is a front view of the oil cup of FIG. 6;

FIG. 8 is a cross-sectional view taken along line A-A of the oil cup of FIG. 7;

Fig. 9 is a perspective view of a tee according to an embodiment of the present invention;

FIG. 10 is a partial cross-sectional view of the tee shown in FIG. 9;

FIG. 11 is a front view of an oil cup according to the prior art;

Fig. 12 is a sectional view taken along line B-B of the oil cup of fig. 11.

In the drawings: 100 is a grease distributing system, 200 is a variable pitch bearing, HP is a high pressure region, LP is a low pressure region, 10 is an oil cup, 11 is an inflow and outflow channel, 12 is an oil nozzle, 13 is a first threaded portion, 14 is an outer hexagon, 15 is a second threaded portion, 11a is an oil inlet, 11b is an oil outlet, 20 is a tee joint, 21 is a first joint, 22 is a second joint, 23 is a third joint, 211 is a first pipe, 211a is an enlarged portion, 212 is a first through hole, 212a is an insertion hole, 213 is a first fastener, 221 is a second pipe, 222 is a second through hole, 222a is an inclined portion, 223 is a ferrule, 224 is a second fastener, 30 is a connecting pipe, 31 is a metal pipe, 32 is a hose, 1 is an oil cup, 2 is an oil nozzle, 3 is a threaded portion, 4 is an outer hexagon, 5 is a through hole, 6 is a valve core, 7 is a spring, 5a is an oil inlet, and 5b is an oil outlet.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the shape of elements may be exaggerated and secondary elements may be omitted to avoid unclear description in order to clearly and concisely illustrate major elements related to the technical idea of the present invention. Like reference numerals refer to like elements throughout the drawings throughout the specification.

as shown in fig. 1 and 2, a pitch bearing 200 according to an embodiment of the invention comprises a grease distribution system 100. An oil filling port connected with the grease distribution system 100 is arranged on the inner ring or the outer ring of the variable-pitch bearing 200. Although in fig. 1 and 2, the oil injection port is disposed on the inner ring of the pitch bearing 200, the present invention is not limited thereto, and the oil injection port may be disposed on the outer ring of the pitch bearing 200.

Hereinafter, a grease distribution system 100 of a pitch bearing 200 according to an embodiment of the present invention will be described with reference to fig. 1 to 10.

according to the utility model discloses an embodiment, become grease distribution system 100 of oar bearing 200 can include: a plurality of tee joints 20, wherein a first port 21 of each tee joint 20 is communicated with an oil filling port of the bearing 200; a plurality of connection pipes 30, the plurality of connection pipes 30 connecting the second and third ports 22 and 23 of the adjacent tees 20 to each other to form an outer loop communicating with the oil filler point, as shown in fig. 1. According to embodiments of the present invention, the grease distribution system 100 may include a plurality of tees 20 in communication with the grease ports and a connecting tube 30 connecting all of the tees 20 into a loop.

According to the utility model discloses an embodiment, a plurality of tee joints 20 can with the oiling mouth one-to-one to communicate all oiling mouths in order to form the outer loop. Preferably, the tees 20 may be evenly arranged in the circumferential direction of the grease distribution system 100 to enhance the grease redistribution effect.

In accordance with embodiments of the present invention, as shown in fig. 2, the grease dispensing system 100 may further include a plurality of oil cups 10. The oil cup 10 may have inflow and outflow passages 11, and the tee 20 may communicate with the oil filling port through the inflow and outflow passages 11 of the oil cup 10. That is, one end of the oil cup 10 may be connected to the oil filling port, and the other end of the oil cup 10 may be connected to the tee 20.

in particular, the tee 20 may include a first port 21, a second port 22, and a third port 23. Wherein, the first port 21 can be connected with one end of the oil cup 10, and the second port 22 and the third port 23 can be connected with the connecting pipe 30. As shown in fig. 1, the connection pipe 30 may connect the second port 22 and the third port 23 of the tee 20 adjacent to each other, thereby forming an outer loop communicating the plurality of oil cups 10 with each other.

According to the utility model discloses an embodiment, as shown in fig. 2, when needs are to become oar bearing 200 filling grease, can break off being connected between first interface 21 and the oil cup 10, then utilize for example quick greasing instrument to pass through oil cup 10 to the interior grease that injects into of each grease nipple of becoming oar bearing 200, the grease enters into each grease nipple through the inflow of oil cup 10 and outflow passageway 11 to get into in the oar bearing 200. After the greasing is completed, the first port 21 is connected to the oil cup 10, forming an outer loop.

according to the utility model discloses a grease distribution system 100, when becoming the grease filling inhomogeneous in the oar bearing 200, the pressure differential of the inside grease of usable oar bearing 200 becomes is the power supply, adjusts the inside grease of oar bearing 200 so that it is even.

Specifically, as shown by arrows in fig. 1, grease in a portion (high pressure region HP shown in fig. 1) of the pitch bearing 200 where the amount of grease is large and the pressure is excessive flows out of the oil cup 10 through the inflow and outflow channel 11 of the oil cup 10 in the portion, enters the external loop, flows to a portion (low pressure region LP shown in fig. 1) of the pitch bearing 200 where the amount of grease is insufficient and the pressure is small through the external loop, and then flows into the oil cup 10 through the inflow and outflow channel 11 of the portion of the oil cup 10 and enters the pitch bearing 200.

according to the embodiment of the present invention, the second interface 22 and the third interface 23 may be ferrule type interfaces to ensure the sealing performance of the connection. Specifically, as shown in fig. 10, the second interface 22 may include a second pipe 221 and a second through hole 222 penetrating the second pipe 221. The second through hole 222 is formed at an end thereof with a slope portion 222a, the slope portion 222a having a surface with a slope that gradually increases toward the outside opening. In addition, the second interface 22 may further include a ferrule 223 inserted into the inclined portion 222a and a second fastening member 224 fitted over the second pipe 221. The outer surface of the ferrule 223 has a shape corresponding to the shape of the inner circumference of the inclined portion 222a to fit the inner circumference of the inclined portion 222 a.

According to an embodiment of the present invention, in order to facilitate connection, as shown in fig. 2, the connection pipe 30 may include a metal pipe 31 and a hose 32 sleeved on the metal pipe 31. In fixing the metal pipe 31, as shown in fig. 10, the ferrule 223 may be caught between the inner wall of the inclined portion 222a and the metal pipe 31 by the locking force of the second fastening member 224, thereby firmly and hermetically fixing the metal pipe 31 to prevent the grease from leaking outside.

It should be understood that although the specific structure of the third interface 23 is not shown, the third interface 23 may have the same structure as that of the second interface 22.

Furthermore, although the second interface 22 and the third interface 23 are described above as ferrule-type interfaces by way of example, the present invention is not limited thereto, and the second interface 22 and the third interface 23 may be any interfaces capable of sealingly fixing the metal pipe 31.

According to the embodiment of the present invention, the first interface 21 of the tee 20 can be connected to the nozzle 12 of the oil cup 10, so the structure of the first interface 21 can be designed according to the structure of the nozzle 12 of the oil cup 10.

According to an embodiment of the present invention, as shown in fig. 7 and 8, the oil cup 10 may include an oil nipple 12 disposed at one end of the oil cup 10. The oil nipple 12 may be of a standard type, and is connected to an oil filler of a greasing tool in a plug-in manner, so as to fill grease into the pitch bearing 200. The nipple 12, in addition to being connected to the filler opening of the greasing tool, also needs to be connected to the first port 21 of the tee 20 to drain excess grease to the external circuit. Specifically, the oil nipple 12 may be in the shape of a bracket.

In order to connect with the oil nipple 12, the end of the first port 21 may be provided with an insertion hole 212a corresponding to the shape of the oil nipple 12, as shown in fig. 4 and 10. Specifically, the first port 21 may include a first pipe 211 and a first through hole 212 penetrating the first pipe 211. The insertion hole 212a is located at an end of the first through hole 212, and has a diameter gradually increasing outward. When the oil nipple 12 is in the shape of a bracket, the insertion hole 212a may also be in the shape of a bracket corresponding to the oil nipple 12 to ensure complete mating with the oil nipple 12. Therefore, when the nozzle 12 is inserted into the insertion hole 212a, the outer wall of the nozzle 12 can be completely fitted to the inner wall of the insertion hole 212a, and leakage of grease can be prevented to ensure sealing.

According to an embodiment of the present invention, as shown in fig. 4 and 10, in order to form the insertion hole 212a, the first pipe member 211 is formed with an enlarged portion 211a at a position corresponding to the insertion hole 212a, and the diameter of the enlarged portion 211a is larger than that of the other portion of the first pipe member 211.

In addition, according to an embodiment of the present invention, the first interface 21 may further include a fixing member to fix the first interface 21 to the oil cup 10. Specifically, according to an embodiment of the present invention, as shown in fig. 4, 7 and 8, the fixing member may be a first fastening member 213 provided on the first pipe 211, and the first fastening member 213 may receive an enlarged portion 211a at an end of the first pipe 211 therein.

According to an embodiment of the present invention, the oil cup 10 may include a first threaded portion 13 disposed below the oil nipple 12. As shown in fig. 4, after the nipple 12 is inserted into the insertion hole 212a, the first fastening member 213 may be screwed down and tightened on the first threaded portion 13, thereby fixing the first port 21 to the oil cup 10.

Although the above illustrates the case where the fixing member is the first fastening member 213, the present invention is not limited thereto, and the fixing member may be any structure capable of fixing the first port 21 to the oil cup 10.

According to the embodiment of the present invention, as shown in fig. 7, the oil cup 10 may further include a second threaded portion 15 disposed at the other end of the oil cup 10, and the second threaded portion 15 may be used for being connected to an oil injection port of the pitch bearing 200. In addition, the oil cup 10 may further include an outer hexagon 14 disposed between the first threaded portion 13 and the second threaded portion 15. By providing the outer hexagon 14, it is possible to facilitate the operation using a tool such as a wrench.

According to an embodiment of the present invention, as shown in fig. 8, the inflow and outflow passages 11 of the oil cup 10 may be through holes penetrating the oil cup 10. The diameter of the oil inlet 11a of the inflow and outflow channel 11 may be B1, the diameter of the oil outlet 11B of the inflow and outflow channel 11 may be B2, and the diameter of the upper portion of the inflow and outflow channel 11 may be smaller than the diameter of the lower portion of the inflow and outflow channel 11 according to the design of the oil cup 10 such that B2 > B1. However, the present invention is not limited thereto, and for example, B2 may be equal to B1.

in addition, according to the utility model discloses an embodiment, the usable high strength material of cup of oil cup 10 is made, and usable 45# steel for example makes, consequently, can improve the withstand pressure and the intensity of cup, can not damaged by high-pressure grease in the filling process.

Fig. 11 and 12 show an oil cup 1 according to the prior art. As shown in fig. 11 and 12, the oil cup 1 includes a nozzle tip 2 for connection with a greasing tool, a threaded portion 3 for connection with an oil filling port of a pitch bearing, and an outer hexagon 4 disposed between the nozzle tip 2 and the threaded portion 3. The inside of the oil cup 1 adopts a check valve structure, and specifically, the check valve structure comprises a valve core 6 and a spring 7 which are arranged in a through hole 5 of the oil cup 1.

When the variable pitch bearing is greased, the valve core 6 overcomes the spring force to compress the spring 7 under the pressure action of the grease, the valve core 6 displaces, the grease enters the oil cup 1 and then flows into the variable pitch bearing, the greasing of the variable pitch bearing is realized, the structure of the check valve automatically resets when no grease pressure exists after the greasing is finished, and dust or sundries are prevented from entering the interior of the variable pitch bearing.

the diameter B1 of the oil inlet 5a and the diameter B2 of the oil outlet 5B of the oil cup 1 are small (B1 < B1 and B2 < B2), and the flow rate is small and the borne rated pressure is small due to the arrangement of the one-way valve. If a quick greasing tool is used for filling grease, the greasing speed is influenced, and the phenomenon that an oil cup is damaged due to overlarge pressure exists. If the bottom of the oil cup is damaged, the valve core 6 and the spring 7 can be pressed out of the oil cup 1 and squeezed into the variable pitch bearing by grease, so that the variable pitch bearing can be damaged, and huge economic loss is brought to the wind generating set.

According to the utility model discloses an embodiment has improved oil cup 10, has omitted the check valve structure, increases diameter B1 of oil inlet 11a and diameter B2 of oil outlet 11B for B1 > B1 and B2 > B2, and utilize high strength material to make the cup of oil cup 10, consequently improved the grease flow and the withstand pressure of oil cup 10, make it be applicable to the instrument of fatting fast. In addition, compared to the oil cup 1 of the related art, the first screw portion 13 is further provided below the oil nipple 12 of the oil cup 10 in order to connect to the first port 21.

Hereinafter, a specific operation of the grease dispensing system 100 according to an embodiment of the present invention will be described with reference to fig. 1 and 2.

According to the utility model discloses an embodiment, as shown in FIG. 2, when needing to become oar bearing 200 and annotate the grease, can be earlier with first fastener 213 top spin, dismantle first fastener 213. Then, the oil filling port of the quick greasing tool is inserted into the oil nozzle 12 of the oil cup 10, and grease is filled into the variable-pitch bearing 200. After the greasing is completed, the oil filler hole is pulled out, the oil nipple 12 is inserted into the insertion hole 212a, and then the first fastening member 213 is screwed. This operation may be repeated until all of the oil ports of pitch bearing 200 are greased.

After the greasing is completed, the tee 20 and the connection pipe 30 communicate all the oil cups 10 with each other, forming an outer loop. When the grease in the variable pitch bearing 200 is not uniformly filled, the grease in the variable pitch bearing is adjusted to be uniform by taking the pressure difference of the grease in the variable pitch bearing 200 as a power source.

In the example described above, the grease dispensing system 100 includes a plurality of grease cups 10 to communicate the grease inlet and the tee 20 with each other. In this case, the grease and redistribution of grease can be achieved simultaneously using the oil cup 10 as a channel. However, the present invention is not limited thereto. The grease dispensing system 100 may also communicate the grease inlet and the tee 20 with each other by other means. For example, the first port 21 of the tee 20 may be connected directly to the oil fill port to effect redistribution of grease. In this case, the greasing may be performed through other oiling channels.

Additionally, it should be understood that while the above describes the application of the grease distribution system to a pitch bearing, the present invention is not limited thereto. The grease distribution system of the present invention is equally applicable to other bearings, if desired, and is not limited to pitch bearings.

According to the embodiment of the utility model, through utilizing tee bend and connecting pipe to form the outside loop of intercommunication oiling mouth, can provide an outside loop for the grease that becomes in the oar bearing, utilize the pressure differential of the inside grease of oar bearing to be the power supply, make the grease flow direction low-pressure area in high nip, improved the grease mobility in the oar bearing of becoming, carry out the redistribution to the grease in the oar bearing of becoming, ensure that the grease in the oar bearing is more even.

According to the utility model discloses an embodiment designs the first joint of tee bend according to the glib talker of oil cup, consequently can guarantee the leakproofness of oil cup and first articulate and the fastness of being connected.

Furthermore, according to the utility model discloses an embodiment, compare with prior art oil cup, through omitting the check valve structure in the oil cup, increase the oil inlet and the oil-out of oil cup, utilize high strength material to make the cup of oil cup, consequently can improve the grease velocity of flow of oil cup and the resistance to pressure of oil cup, make it be applicable to quick currying instrument.

Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims (10)

1. A grease distribution system for a bearing, characterized in that the grease distribution system (100) comprises:

A plurality of tee joints (20), wherein a first interface (21) of each tee joint (20) is communicated with an oil filling port of the bearing (200);

A plurality of connecting pipes (30), the plurality of connecting pipes (30) connecting the second connection port (22) and the third connection port (23) of adjacent tees (20) to each other to form an outer loop communicating with the oil filling port.

2. The grease distribution system for bearings according to claim 1, wherein the plurality of tees (20) correspond one-to-one with the grease ports.

3. Grease distribution system for bearings according to claim 1 or 2, characterised in that the first interface (21) is directly connected with a grease nipple.

4. The grease distribution system of a bearing according to claim 1 or 2, characterized in that the grease distribution system (100) further comprises a plurality of grease cups (10), each grease cup (10) having an inflow and outflow passage (11), one end of each grease cup (10) being adapted to be connected to the grease inlet, the other end of each grease cup (10) being connected to the first port (21) of the tee joint (20).

5. The grease distributing system of a bearing according to claim 4, wherein the oil cup (10) includes a grease nipple (12) provided at the other end of the oil cup (10), and the first port (21) includes a first pipe member (211), an end of the first pipe member (211) being provided with an insertion hole (212a) corresponding to a shape of the grease nipple (12), the grease nipple (12) being inserted into the insertion hole (212 a).

6. The grease distribution system according to claim 5, characterized in that the insertion hole (212a) has a bracket shape corresponding to the grease nipple (12).

7. The grease distributing system according to claim 6, wherein the first pipe member (211) is formed with an enlarged portion (211a) at a position corresponding to the insertion hole (212a), the enlarged portion (211a) having a diameter larger than that of the other portion of the first pipe member (211).

8. grease distribution system for bearings according to claim 5, characterised in that the first interface (21) further comprises a fixing piece fixed to the oil cup (10).

9. the grease distribution system of the bearing according to claim 8, characterized in that the fixing member comprises a first fastening member (213) fitted over the first pipe member (211), and the oil cup (10) further comprises a first threaded portion (13), and the first threaded portion (13) is disposed below the oil nipple (12) and is engaged with the first fastening member (213).

10. A pitch bearing, characterized in that the pitch bearing (200) comprises a grease distribution system according to any of claims 1-9.