Turntable bearing seal

Abstract

The utility model discloses a turntable bearing sealing structure which comprises a sealing ring located between a bearing inner ring and a bearing outer ring, the sealing ring comprises a protective seal and a main seal, the protective seal is located on the upper side of the main seal, and the protective seal and the main seal are connected through a connecting point. Meanwhile, a first protection lip and a second protection lip are arranged at the two ends of the protection seal respectively and connected through a middle protection seal body, the installed first protection lip makes contact with the end face of the inner circle of the bearing, and the installed second protection lip makes contact with the end face of the outer ring; the installed protective seal covers and protects the outer side of the main seal. The sealing device is high in sealing reliability and pressure resistance, operation of repeatedly installing a protective seal and a main seal is omitted, the sealing device is convenient to use, assembly working hours are effectively reduced, and compared with a split sealing ring, the sealing device can save manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a turntable bearing seal, in particular to a seal for a yaw and pitch bearing of a wind power generation, and belongs to the technical field of seals. Background Art

[0002] In recent years, the wind power industry has developed rapidly, installed capacity has steadily increased, and wind energy has become an indispensable part of clean energy at home and abroad.

[0003] Yaw and pitch bearings are important components of wind turbines. Pitch bearings mainly adjust the blade angle and bear the weight of the blade and wind force. Yaw bearings are located at the bottom of the nacelle, carrying the entire mass of the main transmission system of the wind turbine and adjusting the windward angle of the impeller. Each yaw and pitch bearing is equipped with an oil injection and oil collection system, which requires the seal to be able to withstand higher pressure to prevent grease leakage and ensure the normal operation of the oil injection and oil collection process. The seal not only prevents grease leakage inside the bearing, but also prevents impurities outside the bearing from entering the bearing, which plays an important role in the normal operation of the yaw and pitch bearings. In the bearing processing process, protective seals must be used to protect the bearings before sandblasting and zinc blasting. After the zinc blasting and sandblasting are completed, the protective seals are removed and the formal seals are installed. There are currently two main methods. One is to install the protective seal first and then install the formal seal after sandblasting and zinc blasting; the other is to install the formal seal first and then install a layer of protective seal on it, and remove the protective seal after zinc blasting and sandblasting. The above methods have the problems of cumbersome operation and high cost. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems existing in the existing sealing structure and to provide a turntable bearing seal applicable to yaw and pitch bearings.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a turntable bearing sealing structure, including a sealing ring located between the inner ring of the bearing and the outer ring of the bearing, the sealing ring including a protective seal and a main seal, the protective seal is located on the upper side of the main seal, and the protective seal and the main seal are connected through a connecting point, and at the same time, a first protective lip and a second protective lip are respectively provided at both ends of the protective seal, the first protective lip and the second protective lip are connected through the middle protective seal body, and the first protective lip after installation contacts with the inner circle end face of the bearing, and the second protective lip after installation contacts with the outer ring end face, and the installed protective seal covers and protects the outer side of the main seal.

[0006] Furthermore, the main seal includes a shoulder located at the upper end, a mounting handle located at the right end, a dust lip located on the upper side of the left end, a second sealing lip located in the middle of the left side, a first sealing lip located at the lower side of the left end, and a sealing waist located in the middle.

[0007] Furthermore, after installation, the shoulder contacts the outer circumferential end surface of the bearing inner ring, and a radial groove matching with the installation handle is provided on the outer circumferential end surface of the bearing inner ring.

[0008] Furthermore, the dust lip contacts the axial end face of the bearing outer ring after installation, and the second sealing lip contacts the axial end face of the bearing outer ring after installation. An annular groove matching the first sealing lip is provided on the inner circular end face of the bearing outer ring, and the first sealing lip contacts the annular groove after installation.

[0009] Furthermore, the upper and lower sides of the radial groove are respectively provided with triangular notches, and the outer sides of the triangular notches are vertical surfaces.

[0010] Furthermore, the lower side of the installation handle is provided with a barb, and the upper side is provided with an arc-shaped protrusion, and the installation handle is interference-fitted with the radial groove after installation.

[0011] Furthermore, an inwardly inclined surface is provided on the left side of the shoulder and is connected to the dust lip through an arc.

[0012] Furthermore, the dust lip and the sealing lip on the main seal form two sealing cavities after installation.

[0013] Furthermore, the protective seal and the main seal are connected together via 2 to 3 easily tearable connection points.

[0014] The beneficial effects of the utility model are as follows: the sealing structure of the utility model includes a protective seal and a main seal. The protective seal and the main seal are connected by 2-3 points. The seal only needs to be installed once before the bearing is sandblasted and zinc-sprayed. After sandblasting and zinc-spraying, the outer protective seal can be torn off, eliminating the operation of repeatedly installing the protective seal and the main seal. It is easy to use and effectively reduces the assembly time. Compared with the split seal, this one-piece seal ring can save manufacturing costs. A triangular groove is provided on the upper and lower sides of the radial groove of the bearing, which can effectively prevent the installation handle from falling out after cooperating with the seal installation handle. The main seal has a dustproof lip and two sealing lips. The dustproof lip and the sealing lip form two sealing cavities with the outer ring of the bearing. The internal pressure of the bearing can be released step by step when passing through the sealing lip, thereby improving the sealing performance of the seal ring. One of the sealing lips is a radial lip, which can exert radial force on the sealing lip under the pressure from the internal bearing, thereby improving the pressure resistance of the seal. Thereby increasing the reliability of the seal.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the sealing structure.

[0017] Figure 2 This is a cross-sectional view of the inner and outer rings of the bearing in this sealing structure.

[0018] Figure 3 This is a cross-sectional view of the sealing ring in this sealing structure.

[0019] Markings in the figure are: 1-bearing outer ring, 11-outer ring shoulder, 12-annular groove, 13-outer ring end face, 2-protective seal, 21-first protective lip 1, 22-protective seal body, 23-connection point, 24-second protective lip, 3-main seal, 31-sealing waist, 311-bevel, 32-mounting handle, 321-convex ring, 322-barb, 33-first sealing lip, 34-second sealing lip, 35-dustproof lip, 4-bearing inner ring, 41-radial groove, 411-triangular groove, 412-inner ring end face. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 , 2 As shown in Figure 3, a turntable bearing seal comprises a bearing outer ring 1, a sealing ring and a bearing inner ring 4. The bearing outer ring 1 is provided with an outer ring shoulder 11, an annular groove 12 and an outer ring end face 13, and the bearing inner ring 4 is provided with a radial groove 41 and a triangular notch 411. The sealing ring is composed of a protective seal 2 and a main seal 3. The protective seal 2 is provided with a first protective lip 21 on the left side and a second protective lip 24 on the right side. The two protective sealing lips are connected through a protective seal body 22 in the middle. A connection point 23 is provided on the lower side of the protective seal body 22. The first protective lip 21 contacts the inner cylindrical end face 412 of the bearing, and the second protective lip 24 contacts the outer ring end face 13. The main seal 3 comprises a shoulder at the upper end, a mounting handle 32 at the right end, a dust lip 35 at the upper side of the left end, a second sealing lip 34 at the middle of the left side, a first sealing lip 33 at the lower side of the left end, and a sealing waist 31 at the middle. The dust lip 35 contacts the outer ring end face 13, the second sealing lip 34 contacts the outer ring end face 13, the first sealing lip 33 contacts the annular groove 12, the mounting handle 32 is provided with a convex ring on the upper side, and a barb 322 on the lower side, the mounting handle 32 is interference fit with the radial groove 41, the mounting handle 32 and the dust lip 35 are connected through the sealing waist 31, and a slope 311 is provided on the left side of the sealing waist 31 for easy installation of the sealing ring.

[0022] The protective seal 2 and the main seal 3 form a whole through the connection point 23. The connection points 23 are generally set to 2 to 3. After the sealing ring is installed, the protective seal 2 can completely cover the main seal 3 and play a protective role in the sandblasting and zinc spraying of the bearing. After the sandblasting and zinc spraying are completed, the protective seal 2 is separated from the main seal 3 at the connection point 23. The dust lip 35 and the second sealing lip 34 form a sealed cavity with the bearing outer ring 1. The second sealing lip 34 and the first sealing lip 33 form a sealed cavity with the bearing outer ring 1. When the grease passes through the sealed cavity, the pressure decreases step by step, thereby enhancing the pressure resistance of the seal. The mounting handle 32 is assembled with the radial groove 41. The triangular groove 411 on the radial groove 41 can prevent the mounting handle from falling out and improve the sealing performance.

[0023] In summary, in the sealing of this structure, the protective seal 2 and the main seal 3 form a whole through the connection point 23. The sealing ring only needs to be installed once during the bearing processing, which optimizes the process and effectively reduces the production cost. The triangular notch is provided on the radial groove 41 to prevent the installation handle 32 from falling out and improve the sealing performance. The dustproof lip 35, the second sealing lip 34 and the first sealing lip 33 are respectively in contact with the outer ring of the bearing to form a sealed cavity, which can effectively prevent external dust from entering the bearing and prevent internal grease from leaking.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the utility model in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the utility model.

[0025] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A turntable bearing seal, comprising a sealing ring located between a bearing inner ring and a bearing outer ring, characterized in that: The sealing ring includes a protective seal and a main seal, the protective seal is located on the upper side of the main seal, and the protective seal and the main seal are connected through a connection point, and a first protective lip and a second protective lip are respectively provided at both ends of the protective seal, the first protective lip and the second protective lip are connected through the protective seal body in the middle, and the first protective lip after installation contacts the inner circle end face of the bearing, and the second protective lip after installation contacts the outer ring end face, and the installed protective seal covers and protects the outer side of the main seal.

2. A turntable bearing seal according to claim 1, characterized in that: The main seal includes a shoulder at the upper end, a mounting handle at the right end, a dust lip at the upper side of the left end, a second sealing lip at the middle of the left side, a first sealing lip at the lower side of the left end, and a sealing waist at the middle.

3. A turntable bearing seal according to claim 2, characterized in that: After installation, the shoulder contacts the outer cylindrical end surface of the bearing inner ring, and a radial groove matching with the installation handle is provided on the outer cylindrical end surface of the bearing inner ring.

4. A turntable bearing seal according to claim 2, characterized in that: After installation, the dust lip contacts the axial end face of the bearing outer ring, and the second sealing lip contacts the axial end face of the bearing outer ring after installation. An annular groove matching the first sealing lip is provided on the inner circular end face of the bearing outer ring, and the first sealing lip contacts the annular groove after installation.

5. A turntable bearing seal according to claim 3, characterized in that: The upper and lower sides of the radial groove are respectively provided with triangular notches, and the outer sides of the triangular notches are vertical surfaces.

6. A turntable bearing seal according to claim 3 or 5, characterized in that: The lower side of the installation handle is provided with a barb, and the upper side is provided with an arc-shaped protrusion. After the installation, the installation handle is interference-fitted with the radial groove.

7. A turntable bearing seal according to claim 2, characterized in that: The left side of the shoulder is provided with an inwardly inclined surface which is connected to the dust lip through an arc.

8. A turntable bearing seal according to claim 2, characterized in that: The dustproof lip and the sealing lip on the main seal form two sealing cavities after being installed.

9. A turntable bearing seal according to claim 1, characterized in that: The protective seal is connected to the main seal via 2 to 3 easily tearable connection points.

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