CN213064619U

CN213064619U - High-protection shaft surface oil seal

Info

Publication number: CN213064619U
Application number: CN202021545469.0U
Authority: CN
Inventors: 王俊华; 李红军
Original assignee: Wujiang Tianlong Electronic Machinery Equipment Co ltd
Current assignee: Wujiang Tianlong Electronic Machinery Equipment Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-04-27
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a high protection axial surface oil blanket, it comprises ring form metal casing and rubber circle, and it is installed on the mechanical equipment shell, the ring internal diameter and the mechanical equipment axle interference fit of ring form metal casing, be equipped with circumference on the ring inner edge of ring form metal casing and arrange the outside recess of opening, the lateral wall of recess is crooked to the inboard, the rubber circle includes inner circle and lip, the inner circle with recess shape size the same, the inner circle is fixed in the recess, the outside extension section of lateral wall of ring form metal casing be L type bending structure, L type bending structure's inboard and lip top contact, vacuole formation between ring form metal casing and rubber circle. When the high protection axial surface oil blanket rotates along with the mechanical equipment axle, the lip of rubber circle slides for the mechanical equipment shell, and the cavity between ring form metal casing and the rubber circle forms the negative pressure, and the effect that the negative pressure produced is used at the back of rubber circle, and the lip that promotes the rubber circle is close to the mechanical equipment casing, forms the in close contact seal, and the protecting effect is better.

Description

High-protection shaft surface oil seal

Technical Field

The utility model relates to a mechanical equipment accessory, in particular to an axial plane oil blanket that is used for between through shaft and the seal housing of mechanical equipment.

Background

The two ends of the common mechanical equipment are provided with sealed casings, and the shaft passes through a hole in the center of the casing and has a gap with the casing, so that the shaft can rotate freely in the hole. However, because of the gap, the protection level is not very high, dust, rainwater and even small sand particles can enter the mechanical equipment and be adsorbed in the lubricating oil at the bearing, so that the running performance of the mechanical equipment is reduced, the noise is increased, and the equipment is stopped.

Taking a motor as an example, in order to improve the protection level of the motor, a framework oil seal and other protection measures are usually added on the inner side or the outer side of a motor end cover, or the outer side of a bearing outer cover and the front end of a bearing, a seal is formed between the framework oil seal and a motor shaft, the tightness between the seal and the motor shaft is controlled through a spring, and a friction motion is performed between the motor shaft and the seal. With the structure, good dustproof and waterproof effects can be obtained. However, the requirement for the precision of the shaft in frictional contact with the framework oil seal is high, and a grinding process needs to be carried out on the motor shaft once, so that the production efficiency is influenced, and the manufacturing cost is increased. Otherwise, the sealing lip of the framework seal is abraded too fast, the service life is influenced, and the protection grade is reduced. The sealing form can also cause the temperature rise of a motor bearing and the failure of bearing lubricating grease, and finally cause the shaft seizure of the motor, thereby causing the abnormal shutdown accident of the motor. Under the energy-efficient environment is advocated vigorously at present, because the sealed and shaft friction motion between skeleton leads to the mechanical consumption of motor to increase, influences the efficiency index of motor, has increased user's power consumption expense, leads to product cost to increase, loses market competition.

The utility model discloses a utility model patent with grant publication number CN 203406720U discloses an axial plane oil blanket for high-speed motor comprises annular metal casing and rubber circle, and its structure is simple but its protection level is not high, is not suitable for the protection requirement of high protection motor.

Disclosure of Invention

The utility model aims at providing a high protection level axial plane oil blanket that is applicable to various operating modes, simple structure, realizes sealing between mechanical equipment axle and casing can effectively reduce manufacturing cost and can guarantee mechanical equipment's high protection level for a long time.

The technical scheme of the utility model is that: the utility model provides a high protection axial surface oil blanket, its comprises ring form metal casing and rubber circle, and it is installed on the mechanical equipment shell, ring form metal casing's ring internal diameter and mechanical equipment axle interference fit, is equipped with circumference on ring form metal casing's the ring inner edge and arranges the outside recess of opening, the lateral wall of recess is crooked to the inboard, the rubber circle includes inner circle and lip, the inner circle with recess shape size the same, the inner circle is fixed in the recess, the outside extension section of ring form metal casing's lateral wall is L type bending structure, L type bending structure's inboard and lip top contact, vacuole formation between ring form metal casing and rubber circle.

The utility model has the advantages that: the rubber circle forms the negative pressure along with the rotatory cavity between ring form metal casing of motor shaft back and the rubber circle, and the effect that the negative pressure produced is used at the back of rubber circle, and the lip that promotes the rubber circle is close to the mechanical equipment casing, forms the in close contact with sealed, and the protective effect is better.

Drawings

FIG. 1 is an internal cross-sectional view of the present invention;

fig. 2 is an external plan view of the present invention;

FIG. 3 is a schematic structural view of the present invention installed on an electrical device;

wherein: 1. high protection axial surface oil seal, 2, ring form metal casing, 21, recess, 22, L type bending structure, 3, rubber circle, 31, inner circle, 32, lip, 4, cavity, 5, mechanical equipment axle, 6, mechanical equipment casing.

Detailed Description

As shown in fig. 1 and 2, the high-protection shaft surface oil seal (1) comprises an annular metal shell (2) and a rubber ring (3).

The annular metal shell (2) is preferably made of stainless steel. The rubber ring (3) is preferably a low-temperature fluorine rubber ring.

The inner ring of the circular metal shell (2) is provided with a groove (21) which is circumferentially arranged, and the inner ring (31) is matched and fixed with the groove (21). The lip (32) is bent towards one side of the mechanical equipment shell, and the outer edge of the groove (21) on the inner side of the annular metal shell is bent and extended towards the inner side to form a rubber ring fixing structure. The outer side wall of the circular metal shell (2) extends outwards to form an L-shaped bending structure (22), the inner side of the L-shaped bending structure (22) is in contact with the top end of the lip (32), and a cavity (4) is formed between the circular metal shell (2) and the rubber ring (3). When the lip (32) is in an installation pressing working state, the outer edge of the lip is positioned on the outer side of the plane formed by the L-shaped bending structure (22), and the rubber ring can be protected from being damaged by foreign materials such as external water, sand grains and the like.

As shown in fig. 3, the high-protection shaft surface oil seal (1) is installed on the mechanical equipment shaft (5) through a special installation tool, the lip (32) of the rubber ring (3) is tightly attached to the mechanical equipment shell (6), and the annular inner diameter of the annular metal shell (2) is in interference fit with the mechanical equipment shaft (1), so that the annular metal shell and the mechanical equipment shaft are fixedly connected. When the mechanical equipment is in a static state, the lip (32) of the rubber ring (3) keeps contact and sealing with the mechanical equipment shell (6). When high protection axial surface oil blanket (1) rotates along with mechanical equipment axle (5), lip (32) of rubber circle (3) slide for mechanical equipment shell (6), cavity (4) between ring form metal casing and the rubber circle form the negative pressure, and the effort that the negative pressure produced is used at the back of rubber circle, and the lip that promotes the rubber circle is close to mechanical equipment casing, forms the close contact and seals, and the protecting effect is better.

Claims

1. The utility model provides a high protection axial surface oil blanket, its comprises ring form metal casing and rubber circle, and it is installed on the mechanical equipment shell, ring form metal casing's ring internal diameter and mechanical equipment axle interference fit, be equipped with circumference on ring form metal casing's the ring inner edge and arrange the outside recess of opening, the lateral wall of recess is crooked to the inboard, the rubber circle includes inner circle and lip, the inner circle with recess shape size the same, the inner circle is fixed in the recess, characterized by ring form metal casing's lateral wall outwards extend the section be L type bending structure, L type bending structure's inboard and lip top contact, vacuole formation between ring form metal casing and rubber circle.

2. The high-protection shaft surface oil seal as claimed in claim 1, wherein when the high-protection shaft surface oil seal rotates along with a mechanical equipment shaft, the lip of the rubber ring slides relative to the mechanical equipment shell, a negative pressure is formed in a cavity between the annular metal shell and the rubber ring, and a force generated by the negative pressure acts on the back surface of the rubber ring to push the lip of the rubber ring to be close to the mechanical equipment shell to form tight contact sealing.