Oil groove sealing structure

文档序号：874028 发布日期：2021-03-19 浏览：19次中文

阅读说明：本技术 一种油槽密封结构 (Oil groove sealing structure ) 是由张天鹏罗永刚徐林郝金伟杜鹏曾建宏王笑君谭见伟于 2020-12-17 设计创作，主要内容包括：本发明公开了一种油槽密封结构,属于发电设备轴承技术领域,包括密封盖和与旋转部件适配的密封齿,密封齿与旋转部件之间形成密封间隙,密封齿与密封盖为间隙配合,其特征在于：所述密封盖上设置有调整件,所述调整件上贯穿连接有螺杆,所述螺杆上套有螺母,螺杆的端部开有槽口,所述密封齿与调整件通过螺杆紧固连接,所述密封齿上开有凹槽,凹槽内嵌有加强螺塞,螺杆的一端伸入加强螺塞并与凹槽的底壁接触,螺母套在螺杆的另一端上。本发明能够根据实际运行情况快速灵活调整密封齿与旋转部件的密封间隙,利于保持持久的密封性,提高密封可靠性和密封效果。(The invention discloses an oil groove sealing structure, which belongs to the technical field of power generation equipment bearings and comprises a sealing cover and sealing teeth matched with a rotating part, wherein a sealing gap is formed between the sealing teeth and the rotating part, and the sealing teeth and the sealing cover are in clearance fit, and the oil groove sealing structure is characterized in that: the sealing cover is provided with an adjusting piece, the adjusting piece is connected with a screw rod in a penetrating mode, a nut is sleeved on the screw rod, a notch is formed in the end portion of the screw rod, the sealing teeth are connected with the adjusting piece in a fastening mode through the screw rod, grooves are formed in the sealing teeth, reinforcing screw plugs are embedded in the grooves, one ends of the screw rods stretch into the reinforcing screw plugs and are in contact with the bottom walls of the grooves, and the nut is sleeved at the other end of the screw rod. The invention can quickly and flexibly adjust the sealing clearance between the sealing teeth and the rotating part according to the actual operation condition, is beneficial to maintaining the lasting sealing performance and improves the sealing reliability and the sealing effect.)

1. The utility model provides an oil groove seal structure, including sealed lid (1) and with sealed tooth (3) of rotary part (2) adaptation, form between sealed tooth (3) and rotary part (2) sealed clearance (4), sealed tooth (3) are clearance fit with sealed lid (1), its characterized in that: be provided with adjusting part (5) on sealed lid (1), through connection has screw rod (6) on adjusting part (5), the cover has nut (7) on screw rod (6), and open the tip of screw rod (6) has notch (8), sealed tooth (3) pass through screw rod (6) fastening connection with adjusting part (5), it has the recess to open on sealed tooth (3), and the recess is embedded to have and strengthens plug screw (11), and the one end of screw rod (6) is stretched into and is strengthened plug screw (11) and contact with the diapire of recess, and nut (7) cover is on the other end of screw rod (6).

2. A sump sealing structure according to claim 1, wherein: the number of the nuts (7) is two, and the two nuts (7) are arranged on the screw rod (6) in parallel.

3. A sump sealing structure according to claim 2, wherein: the adjusting piece (5) is connected with a locking piece (9) with an inverted U-shaped cross section, the open end of the locking piece (9) is connected with the sealing cover (1), and the nut (7) is located in the locking piece (9).

4. A sump sealing structure according to claim 3, wherein: a sealing gasket (10) is arranged between the locking piece (9) and the sealing cover (1).

5. A sump sealing structure according to claim 1, wherein: and the sealing clearance (4) between the sealing teeth (3) and the rotating component (2) is 0-2 mm.

Technical Field

The invention relates to the technical field of power generation equipment bearings, in particular to an oil groove sealing structure.

Background

The existing oil groove sealing structure of the power generation equipment mainly comprises a labyrinth seal, a contact seal, an air seal and a combination form of the seals. For the non-contact type sealing of labyrinth sealing and air sealing, the sealing teeth are directly fixed on the sealing cover, and the sealing clearance between the sealing teeth and the rotating component is not easy to adjust, thus being not beneficial to maintaining the lasting sealing performance.

Chinese patent publication No. CN 205779434U, published 2016, 12, month, and 07, discloses a vertical water turbine generator bearing oil groove sealing device, which comprises an oil groove, a thrust collar journal, and a sealing cover, and is characterized in that: the thrust collar is characterized in that a disc boss is arranged on the thrust collar shaft neck, an inner cavity and an outer cavity are arranged on the sealing cover, a sealing block is arranged in the inner cavity, the sealing block is arranged on the disc boss, a notch is formed in the lower end of the sealing block, an air vent is formed in the upper end of the sealing block, the air vent is communicated with the notch, and sealing teeth are connected to the outer wall of the inner cavity.

This patent document discloses a vertical hydraulic generator bearing oil groove sealing device, sealed piece lower extreme is opened there is the notch, through the air to letting in certain pressure in the notch, just forms the stable high-pressure air film of one deck between sealed piece and the disc boss upper surface, and the oil mist just can effectively be sealed to the cooperation seal tooth, prevents that the oil mist from leaking, has good oil mist seal effect. However, the seal clearance between the seal teeth and the rotating member is still not easily adjusted, which is disadvantageous in maintaining the long-lasting sealing performance and is not good in the sealing reliability.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the oil groove sealing structure, which can quickly and flexibly adjust the sealing clearance between the sealing teeth and the rotating part according to the actual operation condition, is favorable for keeping the lasting sealing property and improves the sealing reliability and the sealing effect.

The invention is realized by the following technical scheme:

the utility model provides an oil groove seal structure, including sealed lid and with the sealed tooth of rotary part adaptation, form sealed clearance between sealed tooth and the rotary part, sealed tooth is clearance fit, its characterized in that with sealed lid: the sealing cover is provided with an adjusting piece, the adjusting piece is connected with a screw rod in a penetrating mode, a nut is sleeved on the screw rod, a notch is formed in the end portion of the screw rod, and the sealing teeth are fixedly connected with the adjusting piece through the screw rod.

The number of the nuts is two, and the two nuts are arranged on the screw rod in parallel.

The adjusting piece is connected with a locking piece with an inverted U-shaped cross section, the opening end of the locking piece is connected with the sealing cover, and the nut is located in the locking piece.

And a sealing gasket is arranged between the locking piece and the sealing cover.

The sealing tooth is provided with a groove, a reinforced plug screw is embedded in the groove, one end of the screw rod extends into the reinforced plug screw and contacts with the bottom wall of the groove, and the nut is sleeved at the other end of the screw rod.

And the sealing clearance between the sealing teeth and the rotating component is 0-2 mm.

The beneficial effects of the invention are mainly shown in the following aspects:

according to the invention, a sealing gap is formed between the sealing tooth and the rotating component, the sealing tooth and the sealing cover are in clearance fit, the sealing cover is provided with the adjusting component, the adjusting component is connected with the screw rod in a penetrating manner, the screw rod is sleeved with the nut, the end part of the screw rod is provided with the notch, and the sealing tooth and the adjusting component are in fastening connection through the screw rod.

In the invention, two nuts are arranged on the screw rod in parallel, and the sealing teeth and the adjusting part can be firmly connected together by adopting a double-nut structure, thereby ensuring the use reliability.

In the invention, the adjusting piece is connected with the locking piece with the inverted U-shaped cross section, the opening end of the locking piece is connected with the sealing cover, and the nut is positioned in the locking piece, so that the adjusting piece can be effectively prevented from loosening, and a good sealing effect can be kept.

And a sealing gasket is arranged between the locking piece and the sealing cover, so that oil can be prevented from leaking from the thread of the adjusting piece and the thread of the nut, and the sealing effect is further improved.

And fifthly, according to the invention, the sealing tooth is provided with the groove, the reinforcing plug screw is embedded in the groove, one end of the screw rod extends into the reinforcing plug screw and is in contact with the bottom wall of the groove, and the nut is sleeved on the other end of the screw rod, so that the connecting strength between the screw rod and the sealing tooth can be effectively enhanced.

Sixth, the invention, the seal clearance between rotary part and the seal tooth is 0-2 millimetres, the seal clearance is adjusted flexibly and conveniently.

Drawings

The invention will be further described in detail with reference to the drawings and the detailed description, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of example 2 of the present invention;

FIG. 3 is a schematic structural diagram according to embodiment 3 of the present invention;

FIG. 4 is a schematic structural diagram according to embodiment 4 of the present invention;

FIG. 5 is a schematic structural view of example 5 of the present invention;

the labels in the figure are: 1. sealing cover, 2, rotary part, 3, sealing tooth, 4, sealing clearance, 5, adjusting part, 6, screw rod, 7, nut, 8, notch, 9, retaining member, 10, sealing washer, 11, reinforcing plug screw.

Detailed Description

Example 1

Referring to fig. 1, the oil groove sealing structure comprises a sealing cover 1 and sealing teeth 3 matched with a rotating component 2, a sealing gap 4 is formed between the sealing teeth 3 and the rotating component 2, the sealing teeth 3 and the sealing cover 1 are in clearance fit, an adjusting piece 5 is arranged on the sealing cover 1, a screw rod 6 is connected to the adjusting piece 5 in a penetrating mode, a nut 7 is sleeved on the screw rod 6, a notch 8 is formed in the end portion of the screw rod 6, and the sealing teeth 3 and the adjusting piece 5 are fixedly connected through the screw rod 6.

The embodiment is the most basic implementation mode, form seal clearance 4 between seal tooth 3 and the rotary part 2, seal tooth 3 and sealed lid 1 are clearance fit, be provided with adjusting part 5 on sealed lid 1, through connection has screw rod 6 on adjusting part 5, the cover has nut 7 on the screw rod 6, the tip of screw rod 6 is opened there is notch 8, seal tooth 3 passes through screw rod 6 fastening connection with adjusting part 5, in the use, through adjusting the relative position between adjusting part 5 and the sealed lid 1, just can adjust seal clearance 4 between seal tooth 3 and the rotary part 2, compared with the prior art, can be according to the quick nimble seal clearance 4 of adjusting seal tooth 3 and rotary part 2 of actual motion condition, do benefit to and keep lasting leakproofness, improve seal reliability and sealed effect.

Example 2

Referring to fig. 2, the oil groove sealing structure comprises a sealing cover 1 and a sealing tooth 3 matched with a rotating part 2, a sealing gap 4 is formed between the sealing tooth 3 and the rotating part 2, the sealing tooth 3 and the sealing cover 1 are in clearance fit, an adjusting part 5 is arranged on the sealing cover 1, a screw rod 6 is connected to the adjusting part 5 in a penetrating mode, a nut 7 is sleeved on the screw rod 6, a notch 8 is formed in the end portion of the screw rod 6, and the sealing tooth 3 and the adjusting part 5 are fixedly connected through the screw rod 6.