CN206617585U - A screw bearing labyrinth seal structure - Google Patents

Abstract

The utility model relates to a lead screw bearing labyrinth seal structure, including the lead screw, there is flange through threaded connection on the lead screw, lead screw one end is connected with labyrinth seal structure, labyrinth seal structure includes angular contact bearing, just angular contact bearing installs on the lead screw, angular contact bearing periphery is provided with the bearing frame, angular contact bearing one side is provided with the spacer ring, the bearing cap is installed to the spacer ring periphery, bearing cap one end is provided with gland nut, the angular contact bearing opposite side is provided with spacing jump ring, spacing jump ring one side is provided with V type sealing washer, V type sealing washer one side is provided with lead screw locking washer, lead screw locking washer one side is provided with lead screw locking nut, and a whole set of structural sealing performance is good, stable in structure, long service life.

Description

A screw bearing labyrinth seal structure

technical field

The utility model relates to a labyrinth sealing structure of a screw bearing, which belongs to the technical field of machinery.

Background technique

Ball screw is an ideal product for converting rotary motion into linear motion, or converting linear motion into rotary motion. Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or convert torque into axial repeated force, and at the same time have the characteristics of high precision, reversibility and high efficiency. Due to its small frictional resistance, ball screws are widely used in various industrial equipment and precision The instrument, the ball screw is composed of screw, nut, steel ball, pre-compressor, reverser, and dust-proof device. Its function is to convert rotary motion into linear motion. This is the further extension and development of Acme screw. The significance of this development is to change the bearing from a sliding action to a rolling action. The sealing structure on the bearing plays a role in preventing external impurities from entering the inner part of the bearing during the use of the bearing. The main function is to prevent impurities from entering the inner space of the bearing. In order to reduce the influence of external impurities entering the bearing on the bearing life during the use of the bearing, since the bearing will generate a large amount of heat after operation, as the heat increases, after exceeding a certain value, the grease will be diluted, from the mechanical seal Outflow, the bearing will fail early after lack of lubrication, which will affect the service life, so it is necessary to improve the sealing performance.

Utility model content

The technical problem to be solved by the utility model overcomes the existing defects and provides a screw bearing labyrinth sealing structure with good sealing performance, stable structure and long service life, which can effectively solve the problems in the background technology.

In order to solve the above technical problems, the utility model provides the following technical solutions:

A labyrinth seal structure for a lead screw bearing, comprising a lead screw, on which a connecting flange is threadedly connected, one end of the lead screw is connected with a labyrinth seal structure, the labyrinth seal structure includes an angular contact bearing, and the The angular contact bearing is installed on the lead screw, the outer periphery of the angular contact bearing is provided with a bearing seat, one side of the angular contact bearing is provided with a spacer, the periphery of the spacer is provided with a bearing cover, and one end of the bearing cover is provided with a seal Nut, the other side of the angular contact bearing is provided with a limit clamp spring, one side of the limit clamp spring is provided with a V-shaped sealing ring, one side of the V-shaped seal ring is provided with a screw lock washer, and the wire A lead screw lock nut is arranged on one side of the bar lock washer.

Further, the angular contact bearing is a thrust angular contact bearing, and the installation method is back-to-back installation, and the bearing seat is a special bearing seat for a screw.

Furthermore, the sealing nut is a high-strength nut, and a rubber washer is arranged between the sealing nut and the bearing cover.

Further, the sealing space formed between the V-shaped sealing ring and the screw locking washer is filled with lubricating oil to form an oil seal structure.

Further, the spacer ring and the lead screw are interference fit, the V-shaped sealing ring and the lead screw are interference fit, and the sealing nut and the lead screw are transition fit.

The beneficial effects of the utility model: a screw bearing labyrinth sealing structure, the basis of the sealing structure is formed by setting the bearing seat for installing the angular contact bearing, the structural stability is good, and the right side is realized by setting the spacer ring, the bearing cover and the sealing nut The seal on the left side is realized by setting limit circlips, V-shaped sealing rings, screw lock washers and screw lock nuts. The overall thread pre-tightening is used, and the sealing performance is better. Lubricating oil is filled in the sealing space formed between screw lock washers to form an oil seal structure, which can effectively lubricate and dissipate heat to the bearing, further improves the sealing performance, and at the same time increases the service life of the overall structure.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model.

Fig. 1 is an external structure diagram of a screw bearing labyrinth seal structure of the utility model.

Fig. 2 is an A-A sectional view of a screw bearing labyrinth seal structure of the present invention.

Fig. 3 is a structure diagram of a screw bearing labyrinth seal structure of the utility model.

Labels in the figure: 1, lead screw; 2, connecting flange; 3, labyrinth seal structure; 4, spacer ring; 5, bearing cover; 6, sealing nut; 7, angular contact bearing; 8, limit circlip; 9 , V-shaped sealing ring; 10, screw lock washer; 11, screw lock nut; 12, bearing seat.

detailed description

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

As shown in Figures 1-3, a screw bearing labyrinth seal structure includes a lead screw 1, a connecting flange 2 is threaded on the lead screw 1, and a labyrinth seal structure 3 is connected to one end of the lead screw 1. Used to seal the screw bearing, the labyrinth seal structure 3 includes an angular contact bearing 7, and the angular contact bearing 7 is installed on the screw 1 for connecting the screw 1 to achieve overall movement, the angular contact A bearing seat 12 is provided on the periphery of the bearing 7 for installing the angular contact bearing 7. A spacer 4 is provided on one side of the angular contact bearing 7 for connecting to the lead screw 1 and effectively sealing the gap of the threaded part. A bearing cover 5 is installed on the periphery of the spacer ring 4, and a sealing nut 6 is provided at one end of the bearing cover 5. The sealing of one side of the bearing cover 5 is realized through the pre-tightening of the sealing nut 6, and the other side of the angular contact bearing 7 is limited. Position retainer 8 is used to play a position-limiting role, and one side of the position-limiting retainer 8 is provided with a V-shaped sealing ring 9 for sealing, and one side of the V-shaped sealing ring 9 is provided with a lead screw A lock washer 10, a screw lock nut 11 is arranged on one side of the screw lock washer 10 to realize sealing to the left side.

More specifically, the angular contact bearing 7 is a thrust angular contact bearing, and the installation method is back-to-back installation, the bearing seat 12 is a special bearing seat for a screw, and the sealing nut 6 is a high-strength nut, which can provide a large The pre-tightening force will not fail, and a rubber gasket is also provided between the sealing nut 6 and the bearing cover 5, and the sealing space formed between the V-shaped sealing ring 9 and the screw lock washer 10 is filled with lubricating oil to form a The oil seal structure can effectively lubricate and dissipate heat to the bearing, further improving the sealing performance, and at the same time improving the service life of the overall structure. The spacer 4 and the screw 1 are interference fit, and the V-shaped The seal ring 9 is an interference fit with the lead screw 1, and the seal nut 6 and the lead screw 1 is a transition fit with better sealing performance.

The utility model is improved on: a screw bearing labyrinth sealing structure, which uses two methods of liquid seal and mechanical seal to realize the sealing of the screw shaft, and the foundation of the sealing structure is formed by setting the bearing seat 12 for installing the angular contact bearing 7, the structure The stability is good, the sealing on the right side is realized by setting the spacer ring 4, the bearing cover 5 and the sealing nut 6, and the sealing on the right side is realized by setting the limit circlip 8, the V-shaped sealing ring 9, the screw lock washer 10 and the screw lock nut 11 Realize the sealing on the left side, and the thread is pre-tightened as a whole, and the sealing performance is good. By filling the sealing space formed between the V-shaped sealing ring 9 and the screw lock washer 10, lubricating oil is formed to form an oil seal structure, which can protect the bearing Effectively lubricate and dissipate heat, further improve the sealing performance, and at the same time increase the service life of the overall structure.

The above is a preferred embodiment of the utility model, and those skilled in the art of the utility model can also change and modify the above-mentioned embodiment. Therefore, the utility model is not limited to the above-mentioned specific embodiment. Anyone skilled in the art Any obvious improvement, replacement or modification made on the basis of the present utility model belongs to the protection scope of the present utility model.

Claims (5)

1. a kind of leading screw bearing labyrinth seal structure, including leading screw (1), it is characterised in that：Connected on the leading screw (1) by screw thread Adpting flange (2) is connected to, described leading screw (1) one end is connected with labyrinth seal structure (3), and the labyrinth seal structure (3) includes Angular contact bearing (7), and the angular contact bearing (7), on leading screw (1), angular contact bearing (7) periphery is provided with Bearing block (12), angular contact bearing (7) side is provided with spacer ring (4), and spacer ring (4) periphery is provided with bearing cap (5), Described bearing cap (5) one end is provided with sealing nut (6), and angular contact bearing (7) opposite side is provided with spacing jump ring (8), Spacing jump ring (8) side is provided with V-shaped seal ring (9), and V-shaped seal ring (9) side is provided with leading screw lock washer (10), leading screw lock washer (10) side is provided with leading screw locking nut (11).

2. a kind of leading screw bearing labyrinth seal structure according to claim 1, it is characterised in that：The angular contact bearing (7) For thrust angular contact bearing, mounting means is back-to-back installation, and the bearing block (12) is leading screw special axis bearing.

3. a kind of leading screw bearing labyrinth seal structure according to claim 1, it is characterised in that：The sealing nut (6) is High strength nut, rubber washer is additionally provided between the sealing nut (6) and bearing cap (5).

4. a kind of leading screw bearing labyrinth seal structure according to claim 1, it is characterised in that：The V-shaped seal ring (9) with Filled with lubricating oil formation oil enveloping structure in the sealing space formed between leading screw lock washer (10).

5. a kind of leading screw bearing labyrinth seal structure according to claim 1, it is characterised in that：The spacer ring (4) and leading screw (1) it is interference fit between, is interference fit, the sealing nut (6) and silk between the V-shaped seal ring (9) and leading screw (1) It is interference fits between thick stick (1).