Grease suction unit for extracting grease in bearing cavity

Abstract

The invention discloses a grease suction unit for extracting grease in a bearing cavity, which comprises a grease suction pump, a transmission block is arranged in a slideway of the grease suction pump, and the grease suction pump drives the transmission block to do lifting reciprocating motion; an oil outlet is formed in the liposuction pump; a liposuction pipe is arranged below the liposuction pump, a piston assembly is arranged at the bottom end of the liposuction pipe and comprises a piston sleeve and a piston rod, and the piston rod achieves opening and closing of the piston sleeve through lifting. The transmission blocks are connected with piston rods through connecting mechanisms; the connecting mechanism comprises a first connecting rod, a second connecting rod, a first rack, a second rack and a gear; according to the grease suction unit, the transmission block and the piston rod make mirror image actions all the time, so that when the transmission block ascends, the space between the transmission block and the piston assembly is enlarged, high-strength negative pressure suction force is generated, and grease in a lubricating cavity can be sucked into a grease suction cavity through the opened piston assembly; grease originally sucked into the grease suction cavity cannot be squeezed out, and repeated suction of the grease is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a grease suction unit for extracting grease from a bearing cavity. Background Art

[0002] In the field of wind power generation, bearings are important components used to support the rotor and shaft of the generator, while bearing the inertia and wind load generated by the rotation of the blades to ensure the normal operation of the generator set. Bearings need to be fully lubricated during operation. Grease in the operation of the bearing can ensure the smoothness of the bearing surface, reduce the friction coefficient and wear, improve working stability, and effectively extend the service life.

[0003] During lubrication, the bearing is generally sealed in a bearing lubrication cavity, in which grease is installed to lubricate the bearing. The lubrication cavity is generally provided with a grease port for adding grease after the grease is consumed. However, since the grease will not be completely used, waste grease with impurities will be generated, and it is not easy to discharge from the lubrication cavity. When new grease is added directly, the grease will contain impurities, which will prevent the bearing from working stably with high quality.

[0004] To this end, the patent document of our company with authorization announcement number CN222066974U discloses an electric liposuction device for sucking bearing grease, including an electric liposuction pump, a transmission rod is provided at the top end of the slideway of the electric liposuction pump; the electric liposuction pump is equipped with a liposuction tube, a piston tube is provided at the bottom end of the liposuction tube, a piston sleeve assembly and a piston rod are provided in the piston chamber, and a channel is provided in the piston sleeve assembly; a spring is provided in the piston chamber, the top end of the spring abuts against the end of the liposuction tube, and the bottom end abuts against the top end of the piston sleeve assembly, and the top end of the piston rod is connected to the bottom end of the transmission rod by a connecting rod; the connecting part of the electric liposuction pump is provided with a grease port connected to the slideway, and a one-way valve seat is provided at the end of the liposuction tube; the liposuction device can realize the suction of bearing grease.

[0005] However, the above scheme still has the following deficiencies in actual operation: 1. During liposuction, the piston rod is raised and lowered synchronously with the transmission rod. When the piston rod descends, the channel is opened, and the descent of the transmission rod will squeeze the space of the liposuction chamber, which will cause interference. That is, when the piston rod descends to open the channel, part of the grease will be squeezed out when the transmission rod compresses the space, resulting in repeated suction of the grease and low liposuction efficiency; 2. When the grease is discharged from the grease port, the rise of the transmission rod will increase the space of the original grease, which is not conducive to pressurized discharge; 3. Only when the piston sleeve assembly is closed and raised will the bearing lubrication chamber at the bottom be greased, and the piston sleeve assembly has a short stroke, which further affects the liposuction efficiency. Summary of the invention

[0006] The present invention provides a grease suction unit for extracting grease in a bearing cavity. The transmission block of the grease suction unit and the piston rod always perform mirror actions. Thus, when the transmission block rises, the space between the transmission block and the piston assembly will increase, generating a high-intensity suction force, so that the grease in the lubrication cavity will be sucked into the grease suction cavity through the opened piston assembly, to solve the problems raised in the above-mentioned background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A grease suction unit for extracting grease in a bearing cavity, including a grease suction pump. A vertical slideway is provided inside the grease suction pump, and a transmission block is installed in the slideway, and the transmission block is driven to move up and down reciprocally;

[0008] An oil outlet communicating with the slideway is provided on the grease suction pump;

[0009] A grease suction pipe is installed below the grease suction pump through a connecting part. The inside of the grease suction pipe is a grease suction cavity communicating with the slideway. A piston assembly is installed at the bottom end of the grease suction pipe. The piston assembly is connected to the transmission block through a connecting mechanism, and the opening and closing control is realized through the up and down movement of the transmission block.

[0010] Preferably, an oil outlet connecting head is installed on the oil outlet, and a one-way valve is installed inside the oil outlet connecting head.

[0011] Preferably, the grease suction pump includes a housing. A motor is installed on the side of the housing. After the output shaft of the motor extends into the housing, an eccentric wheel is fixed. The eccentric wheel is hinged to the top end of the transmission block through a connecting mechanism. Multiple rings of annular grooves are provided on the outer wall of the transmission block, and sealing rings are installed in the annular grooves.

[0012] Preferably, the piston assembly includes a piston sleeve and a piston rod passing through the middle thereof. The opening and closing of the piston sleeve are realized through the up and down movement of the piston rod. The transmission block is connected to the piston rod through a connecting mechanism, and the opening and closing control of the piston assembly is realized through the up and down movement of the transmission block.

[0013] Preferably, the connecting mechanism includes a first connecting rod and a second connecting rod. The top end of the first connecting rod is connected to the bottom end of the transmission block through a pin shaft. The bottom end of the second connecting rod is connected to the top end of the piston rod through a pin shaft. A first rack is installed at the bottom end of the first connecting rod. A second rack opposite to the first rack is installed at the top end of the second connecting rod. A gear meshing with the first rack and the second rack is installed in the middle of the first rack and the second rack.

[0014] Preferably, both the first rack and the second rack are provided with connecting plates, and are respectively connected to the first connecting rod and the second connecting rod through the connecting plates. The first rack, the second rack, and the connecting plates are closely attached to the inner wall of the grease suction cavity, and there is a through port between the connecting plates and the grease suction cavity.

[0015] Preferably, the connecting part is a connecting pipe. The head end and the bottom end of the connecting pipe are respectively connected to the liposuction pump and the liposuction tube. The inside of the connecting pipe is also provided with a liposuction cavity, and the gear is rotatably installed inside the connecting pipe.

[0016] Preferably, the piston assembly further includes a piston pipe connected to the bottom end of the liposuction tube. A piston cavity is provided inside the piston pipe. The piston assembly is located inside the piston cavity, and a second one-way valve is installed at the bottom end of the piston pipe.

[0017] Preferably, a retaining ring is fixedly assembled on the piston rod. When the piston rod moves downward, the bottom end of the retaining ring abuts against the top end of the piston sleeve, pushing the piston sleeve to move downward.

[0018] Preferably, the outer wall of the piston sleeve is in close contact with the inner wall of the piston cavity. A channel is provided inside the piston sleeve. The piston rod body penetrates through the channel. There is a gap between a part of the piston rod body and the inner wall of the piston sleeve. The outer diameter of the bottom end of the piston rod is larger than the inner diameter of the channel. A spring is provided inside the piston cavity, and the spring abuts against the end of the liposuction tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The transmission block and the piston rod always make mirror-image movements. Thus, when the transmission block rises, the space between the transmission block and the piston assembly will increase, generating a high-intensity suction force, causing the grease in the lubrication cavity to be sucked into the liposuction cavity through the opened piston assembly.

[0021] 2. The transmission block and the piston rod do not interfere with each other. Thus, when the piston assembly is opened, the transmission block is pulled upward to generate a suction force, making the grease originally sucked into the liposuction cavity not easily be squeezed out, avoiding repeated suction of the grease.

[0022] 3. When the transmission block descends, the piston rod rises and the piston assembly closes. Then, the closed liposuction cavity is squeezed bidirectionally and synchronously, increasing the pressure of the grease sucked into the liposuction cavity and discharging it through the oil outlet.

[0023] 4. When the transmission block descends, the piston assembly closes. At this time, the rising and closed piston assembly can still perform liposuction at the bottom end. Cooperating with the rising liposuction of the transmission block, liposuction can be achieved both when the piston rod rises and descends, which is more efficient.

[0024] 5. The lifting drive action of the eccentric wheel will generate liposuction or extrusion and oil discharge with a double stroke, and the liposuction and oil discharge efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view structural schematic diagram of the present invention;

[0026] Figure 2 is Figure 1 the enlarged structural schematic diagram at A of

[0027] Figure 3 For Figure 1 The enlarged structural schematic diagram at position B of

[0028] Figure 4 For Figure 1 The enlarged structural schematic diagram at position C of

[0029] Figure 5 The partial top view structural schematic diagram of the connecting mechanism of the present invention.

[0030] In the figure: 1, fat suction pump; 2, slideway; 3, transmission block; 4, oil outlet; 5, fat suction tube; 6, fat suction cavity; 7, oil outlet connector; 8, one-way valve; 9, sealing ring; 10, piston sleeve; 11, piston rod; 12, first connecting rod; 13, second connecting rod; 14, first rack; 15, second rack; 16, gear; 17, connecting plate; 18, through hole; 19, connecting pipe; 20, piston pipe; 21, second one-way valve; 22, retaining ring; 23, spring. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 - 5 , the present invention provides a fat suction unit for extracting grease in a bearing cavity, including a fat suction pump 1. A vertical slideway 2 is provided inside the fat suction pump 1, and a transmission block 3 is installed in the slideway 2 to drive the transmission block 3 to perform reciprocating lifting motion;

[0033] The fat suction pump 1 is controlled by an external control system to drive the transmission block 3 to perform reciprocating lifting motion. Through the reciprocating lifting motion, the pressure of the fat suction tube 5 changes to cooperate with the piston assembly to perform fat suction work;

[0034] An oil outlet 4 communicating with the slideway 2 is provided on the fat suction pump 1 to facilitate discharging the grease inhaled into the fat suction tube 5 through the oil outlet 4 under pressure;

[0035] Below the fat suction pump 1, a fat suction tube 5 is installed through a connecting part. Inside the fat suction tube 5 is a fat suction cavity 6 that communicates with the slideway 2. At the bottom end of the fat suction tube 5, a piston assembly is installed. The piston assembly is connected to the transmission block 3 through a connecting mechanism and realizes switch control through the lifting of the transmission block 3. During use, the fat suction tube 5 is inserted and installed on the bearing lubrication mechanism. The end of the fat suction unit extends into its grease through the grease port of the bearing lubrication cavity and is sealed and fixed at the port. At the bottom end of the fat suction tube 5, a piston assembly is installed. Further, the lifting of the transmission block 3 drives the reciprocating switch movement inside the piston assembly, which is opened during fat suction and closed when discharging the grease.

[0036] Please refer to Figure 2 , an oil outlet connector 7 is installed on the oil outlet 4, and a one-way valve 8 is installed inside the oil outlet connector 7; in this embodiment, thus when the transmission block 3 rises, it will not cause the grease inside the oil outlet connector 7 to be sucked back by negative pressure.

[0037] Please refer to Figure 1 , the fat suction pump 1 includes a housing. A motor is installed on the side of the housing. The output shaft of the motor extends into the housing and is fixed with an eccentric wheel. The eccentric wheel is hinged to the top end of the transmission block 3 through a connecting mechanism. Multiple rings of grooves are provided on the outer wall of the transmission block 3, and a sealing ring 9 is installed in the grooves; in this embodiment, when the motor is started to drive the output shaft to rotate, it will further drive the eccentric wheel to rotate. The connecting mechanism is preferably an eccentric wheel sleeve sleeved on the outer circle of the eccentric wheel, and a conventional limiting mechanism for preventing the eccentric wheel sleeve from disengaging is provided, such as a ring groove provided outside the eccentric wheel, and the eccentric wheel sleeve is sleeved in the groove. Since the eccentric wheel is an eccentric structure, the eccentric wheel and the eccentric wheel sleeve will drive the eccentric wheel sleeve to reciprocate. The eccentric wheel sleeve is hinged to the transmission block 3 through a connecting rod, and then drives the transmission block 3 to reciprocate up and down in the slideway 2. By sleeving the sealing ring 9 in the outer ring groove of the transmission block 3, the sealing performance between the transmission block 3 and the slideway 2 can be improved, avoiding air leakage and affecting the lifting and suction.

[0038] Please refer to Figure 1 , the piston assembly includes a piston sleeve 10 and a piston rod 11 passing through the middle thereof. The piston rod 11 realizes the opening and closing of the piston sleeve 10 through lifting. The transmission block 3 is connected to the piston rod 11 through a connecting mechanism, and the lifting of the transmission block 3 realizes the switch control of the piston assembly; in this embodiment, thus the linkage between the transmission block 3 and the piston rod 11 is realized through the connecting mechanism, and synchronous drive is carried out through one driving motor to achieve precise cooperation, and the opening and closing control of the piston sleeve 10 is realized through the lifting of the piston rod 11.

[0039] Please refer to Figure 3, the connecting mechanism includes a first connecting rod 12 and a second connecting rod 13. The top end of the first connecting rod 12 is connected to the bottom end of the transmission block 3 by a pin shaft, and the bottom end of the second connecting rod 13 is connected to the top end of the piston rod 11 by a pin shaft. A first rack 14 is installed at the bottom end of the first connecting rod 12, and a second rack 15 opposite to the first rack 14 is installed at the top end of the second connecting rod 13. A gear 16 meshing with the middle parts of the first rack 14 and the second rack 15 is installed therebetween; in this embodiment, when the transmission block 3 rises, it will drive the first rack 14 to rise through the first connecting rod 12, and then drive the gear 16 to rotate counterclockwise. Furthermore, the gear 16 will synchronously drive the second rack 15 to descend, making the second connecting rod 13 always make a mirror image movement with the first connecting rod 12. Thus, when the transmission block 3 rises, the piston rod 11 descends, and when the transmission block 3 rises, the space between the transmission block 3 and the piston assembly will increase, generating a high-intensity suction force, causing the grease in the lubrication cavity to be sucked into the fat suction cavity 6 through the opened piston assembly; at the same time, when the transmission block 3 descends, the piston rod 11 rises and the piston assembly closes, and then the closed fat suction cavity is squeezed, so that the sucked grease in the fat suction cavity is pressurized and discharged through the oil outlet 4; at the same time, when the transmission block 3 descends, the piston rod 11 rises and the piston assembly closes. At this time, the rising and closed piston assembly can still suck fat at the bottom end, cooperating with the fat suction when the transmission block 3 rises, realizing that the piston rod 11 can suck fat both when rising and descending, which is more efficient; further, the lifting of the eccentric wheel will generate double fat suction or extrusion, and the fat suction and oil discharge efficiency is high.

[0040] Please refer to Figure 3 , both the first rack 14 and the second rack 15 are provided with connecting plates 17, and are respectively connected to the first connecting rod 12 and the second connecting rod 13 through the connecting plates 17. The first rack 14, the second rack 15, and the connecting plates 17 are closely attached to the inner wall of the fat suction cavity 6, and there is a through hole 18 between the connecting plates 17 and the fat suction cavity 6; in this embodiment, by setting the connecting plates 17, it is convenient for the connection between the connecting rod and the rack. At the same time, the first rack 14, the second rack 15, and the connecting plates 17 are closely attached to the inner wall of the fat suction cavity 6, enhancing stability. At the same time, setting the through hole 18 is beneficial for the grease to pass through.

[0041] Please refer to Figure 3 , Figure 5 , the connecting part is a connecting pipe 19. The head end and the bottom end of the connecting pipe 19 are respectively connected to the fat suction pump 1 and the fat suction pipe 5. The inner part of the connecting pipe 19 is also provided with a fat suction cavity 6, and the gear 16 is rotatably installed in the connecting pipe 19; in this embodiment, by setting the detachable connecting pipe 19, it is beneficial for modular assembly, especially the convenient disassembly and assembly of the connecting mechanism.

[0042] Please refer to Figure 4, the piston assembly further includes a piston tube 20 connected to the bottom end of the fat suction tube 5. A piston cavity is provided inside the piston tube 20, and the piston assembly is located in the piston cavity. A second one-way valve 21 is installed at the bottom end of the piston tube 20; in this embodiment, the detachable piston tube 20 is provided to further achieve modular assembly and facilitate the subsequent installation of the spring 23 and the second one-way valve 21. Thus, when the piston rod 11 moves downward, the lower end of the piston rod 11 will disengage from the piston sleeve 10 and lose the blockage of the grease passage, and descend to the limit position. During this period, the transmission block 3 pulls upward for suction, and a negative pressure suction will be generated at the gap of the grease passage. Then, the grease in the bearing lubrication cavity will enter the fat suction cavity 6 under the action of the suction until the grease passage is closed after the piston sleeve 10 abuts against the bottom end of the piston rod 8 under the action of the spring 23. The second one-way valve 21 is provided to further prevent the grease from returning to the grease cavity.

[0043] Please refer to Figure 4 , a retaining ring 22 is fixedly assembled on the piston rod 11. When the piston rod 11 moves downward, the bottom end of the retaining ring 22 abuts against the top end of the piston sleeve 10 and pushes the piston sleeve 10 to move downward; in this embodiment, the retaining ring 22 moves synchronously with the piston rod 11, and when descending, it squeezes the air in the lower space, which is beneficial to pushing the piston sleeve 10 to move downward.

[0044] Please refer to Figure 4 , the outer wall of the piston sleeve 10 is in close contact with the inner wall of the piston cavity. A passage is provided inside the piston sleeve 10, and the body of the piston rod 11 penetrates through the passage. There is a gap between a part of the body of the piston rod 11 and the inner wall of the piston sleeve 10. The outer diameter of the bottom end of the piston rod 11 is larger than the inner diameter of the passage. A spring 23 is provided in the piston cavity, and the spring 23 abuts against the end of the fat suction tube 5; in this embodiment, when the piston rod 11 descends, the passage between the piston rod 11 and the piston sleeve 10 is opened, and when the piston sleeve 10 is in close contact with the piston rod 11, it is closed, realizing opening during suction and closing during fat drainage, which is beneficial to pressing and discharging the grease. A sealing ring is sleeved in the outer ring groove of the piston sleeve 10, so as to improve the sealing performance between the piston sleeve 10 and the piston cavity and avoid air leakage affecting the lifting and suction; setting the spring 23 is beneficial to quickly squeezing the piston sleeve 10 downward when the piston rod 11 descends, so as to realize blocking the grease passage when the piston rod 11 and the piston sleeve 10 descend to the bottom end.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fat suction unit for extracting grease in a bearing cavity, comprising a fat suction pump (1), characterized in that, The fat suction pump (1) is internally provided with a vertical slideway (2), and a transmission block (3) is installed in the slideway (2) to drive the transmission block (3) to move up and down reciprocally; The fat suction pump (1) is provided with an oil outlet (4) communicating with the slideway (2); A fat suction pipe (5) is installed below the fat suction pump (1) through a connecting part. The inside of the fat suction pipe (5) is a fat suction cavity (6) communicating with the slideway (2). A piston assembly is installed at the bottom end of the fat suction pipe (5). The piston assembly is connected to the transmission block (3) through a connecting mechanism, and the opening and closing control is realized through the up and down movement of the transmission block (3).

2. The fat suction unit for extracting the grease in the bearing cavity according to claim 1, characterized in that, An oil outlet connector (7) is installed on the oil outlet (4), and a check valve (8) is installed inside the oil outlet connector (7).

3. The fat suction unit for extracting the grease in the bearing cavity according to claim 1, characterized in that, The fat suction pump (1) includes a housing. A motor is installed on the side of the housing. After the output shaft of the motor extends into the housing, an eccentric wheel is fixed. The eccentric wheel is hinged to the top end of the transmission block (3) through a connecting mechanism. Multiple circular grooves are provided on the outer wall of the transmission block (3), and a sealing ring (9) is installed in the circular grooves.

4. The fat suction unit for extracting grease in the bearing cavity according to claim 1, characterized in that, The piston assembly includes a piston sleeve (10) and a piston rod (11) passing through the middle thereof. The opening and closing of the piston sleeve (10) are realized through the up and down movement of the piston rod (11). The transmission block (3) is connected to the piston rod (11) through a connecting mechanism, and the opening and closing control of the piston assembly is realized through the up and down movement of the transmission block (3).

5. The fat suction unit for extracting the grease in the bearing cavity according to claim 4, characterized in that, The connecting mechanism includes a first connecting rod (12) and a second connecting rod (13). The top end of the first connecting rod (12) is connected to the bottom end of the transmission block (3) through a pin shaft. The bottom end of the second connecting rod (13) is connected to the top end of the piston rod (11) through a pin shaft. A first rack (14) is installed at the bottom end of the first connecting rod (12). A second rack (15) opposite to the first rack (14) is installed at the top end of the second connecting rod (13). A gear (16) meshing with the first rack (14) and the second rack (15) is installed in the middle of the first rack (14) and the second rack (15).

6. The fat suction unit for extracting the grease in the bearing cavity according to claim 5, characterized in that, Both the first rack (14) and the second rack (15) are provided with connecting plates (17), and are respectively connected to the first connecting rod (12) and the second connecting rod (13) through the connecting plates (17). The first rack (14), the second rack (15), and the connecting plates (17) are closely attached to the inner wall of the fat suction cavity (6). There is a through port (18) between the connecting plate (17) and the fat suction cavity (6).

7. The fat suction unit for extracting the grease in the bearing cavity according to claim 6, characterized in that, The connecting part is a connecting pipe (19). The head end and the bottom end of the connecting pipe (19) are respectively connected to the fat suction pump (1) and the fat suction pipe (5). The inside of the connecting pipe (19) is also provided with a fat suction cavity (6). The gear (16) is rotatably installed in the connecting pipe (19).

8. The fat suction unit for extracting grease in the bearing cavity according to claim 1, characterized in that, The piston assembly further includes a piston pipe (20) connected to the bottom end of the fat suction pipe (5). A piston cavity is provided inside the piston pipe (20). The piston assembly is located in the piston cavity. A second check valve (21) is installed at the bottom end of the piston pipe (20).

9. The fat suction unit for extracting the grease in the bearing cavity according to claim 4, characterized in that, A retaining ring (22) is fixedly assembled on the piston rod (11). When the piston rod (11) moves downward, the bottom end of the retaining ring (22) abuts against the top end of the piston sleeve (10), pushing the piston sleeve (10) to move downward.

10. A fat suction unit for extracting grease in a bearing cavity according to claim 9, characterized in that, The outer wall of the piston sleeve (10) is in close contact with the inner wall of the piston chamber. A channel is provided in the piston sleeve (10). The body of the piston rod (11) passes through the channel. There is a gap between a part of the body of the piston rod (11) and the inner wall of the piston sleeve (10). The outer diameter of the bottom end of the piston rod (11) is larger than the inner diameter of the channel. A spring (23) is provided in the piston chamber. The spring (23) abuts against the end of the liposuction tube (5).

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