Lip wear monitoring system for lip seal of rotating shaft

Abstract

The utility model relates to a lip wear monitoring system for a lip seal of a rotating shaft, which comprises an elastic conductor sheet (1), an insulating layer (2), a lip seal (3), a lead (4), a lead (5), a measuring module (6), an indicator light (7), a rotating shaft (8), a lower support ring (9), an upper support ring (10) and a cavity (11). The wire (5) and the rotating shaft (8) are connected and conducted through an electric brush, and the elastic conductor sheet (1) and the rotating shaft (8) are isolated through the lip-shaped seal (3). The seal lip abrasion monitoring system is reliable, can prompt seal replacement in advance before seal leakage, prevents bearing damage caused by leakage, wins precious preparation time for seal replacement, shortens maintenance time as much as possible, reduces shutdown loss, and is particularly suitable for the conditions of shield tunneling machines, ship tail shaft seals and the like needing seal abrasion monitoring.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing technical field, in particular to a kind of lip wear monitoring system for lip seal of rotary shaft. BACKGROUND

[0002] The main drive sealing ring of shield machine is the "immune system" of shield machine, once the main drive seal appears problem, shield machine will be paralyzed and cannot run, and shield machine sealing replacement is difficult, and the related replacement cost and the cost of idle time caused by replacement are very high.

[0003] So it needs to give early warning in advance when sealing is about to fail, to make good preparation work for replacing sealing. Therefore, it is necessary to develop a kind of lip wear monitoring system for lip seal, for sealing failure early warning. UTILITY MODEL CONTENT

[0004] Technical scheme:

[0005] In order to solve the above problems, the utility model takes a new design scheme, provides a kind of lip wear monitoring system for lip seal of rotary shaft, it is characterized by including elastic conductor sheet 1, lip seal 3, first wire 4, second wire 5, measurement module 6 and rotary shaft 8,

[0006] The elastic conductor sheet 1 is arranged at the non-contact surface of the lip seal 3 lip portion and the rotary shaft 8, and is isolated from the rotary shaft 8,

[0007] The elastic conductor sheet 1, the first wire 4, the measurement module 6, the second wire 5 and the rotary shaft 8 are sequentially connected and conducted,

[0008] When the lip seal 3 is worn to the preset position needing replacement, the elastic conductor sheet 1 is in contact with the rotary shaft 8 and is conducted, and the indicating lamp 7 of measurement module 6 is lit.

[0009] Preferably, the elastic conductor sheet 1 is a conductive spring sheet, the surface of which is coated with an insulating layer 2, the lip seal 3 is an insulator, and the rotary shaft 8 is a conductor.

[0010] Preferably, the lip wear monitoring system comprises a lower support ring 9, an upper support ring 10 and a cavity 11 for fixing the elastic conductor sheet 1 and the lip seal 3.

[0011] Preferably, when the lip seal 3 is not worn to the preset position needing replacement, the elastic conductor sheet is isolated from the rotary shaft 8, and the indicating lamp 7 is extinguished.

[0012] Preferably, the second wire 5 is connected and conducted with the rotary shaft 8 through a brush.

[0013] The utility model provides a kind of lip wear monitoring system for lip seal of rotating shaft, can prompt replacement seal in advance before sealing leakage, prevent bearing damage caused by leakage, gain valuable preparation time for sealing replacement, shorten maintenance time as far as possible, reduce downtime loss.The lip wear monitoring system of the utility model is especially suitable for shield machine, and the sealing wear of ship shaft sealing etc.

[0014] The utility model makes further explanation in combination with the drawings. DRAWINGS

[0015] Figure 1 : lip wear monitoring system structure diagram of lip seal

[0016] Figure 2 : lip wear monitoring system assembly schematic view of lip seal

[0017] Figure 3 : lip wear monitoring system sealing lip wear schematic view of lip seal

[0018] Figure 1 : 1. spring conductor sheet, 2. insulating layer, 3. lip seal, 4. insulated wire, 5. insulated wire, 6. measurement module, 7. indicator light, 8. rotating shaft, 9. lower support ring, 10. upper support ring, 11. cavity.

[0019] Figure 2 : 1. spring conductor sheet, 2. insulating layer, 3. lip seal, 4. insulated wire, 5. insulated wire, 6. measurement module, 7. indicator light, 8. rotating shaft, 9. lower support ring, 10. upper support ring, 11. cavity.

[0020] Figure 3 : 1. spring conductor sheet, 2. insulating layer, 3. lip seal, 4. insulated wire, 5. insulated wire, 6. measurement module, 7. indicator light, 8. rotating shaft, 9. lower support ring, 10. upper support ring, 11. cavity. DETAILED DESCRIPTION

[0021] Embodiment:

[0022] Lip wear monitoring system of lip seal, including spring conductor sheet 1, insulating layer 2, lip seal 3, insulated wire 4, insulated wire 5, measurement module 6, indicator light 7, rotating shaft 8, lower support ring 9, upper support ring 10 and cavity 11.

[0023] The material used by spring conductor sheet 1 is thin spring sheet material with thickness ≤0.3mm, for example can be copper spring sheet and stainless steel spring sheet. Cut into long strip shape using wire cutting, then through stamping forming.

[0024] The insulating layer 2 coated on the surface of the elastic conductor sheet 1 can adopt the rubber paste of insulating rubber, be sprayed on the elastic conductor sheet 1 in a spraying mode, and then be vulcanized and formed by using a vulcanization tank.

[0025] The lip seal 3 adopts the insulating rubber and can be integrally molded by using a mold; the lip seal with a large diameter can also be formed by using a segmented vulcanization mode.

[0026] The first wire 4 and the second wire 5 are standard wires with an insulating layer.

[0027] The measuring module 6 is provided with an indicating lamp 7, and the measuring module 6 provides a power supply for a measuring circuit.

[0028] The rotating shaft 8 is a metal conductor and is formed by using a machining mode.

[0029] The lower support ring 9, the upper support ring 10 and the cavity 11 are all formed by using a machining mode, and are used for fastening the elastic conductor sheet 1, the insulating layer 2 and the lip seal 3.

[0030] After the lip seal 3 is installed, the elastic conductor sheet 1 and the rotating shaft 8 are isolated from each other, and the circuit between the elastic conductor sheet 1, the first wire 4, the measuring module 6, the second wire 5 and the rotating shaft 8 is disconnected, and the indicating lamp 7 is extinguished.

[0031] When the lip seal 3 is worn to a preset position requiring replacement of the seal, the elastic conductor sheet 1 is in contact with the rotating shaft 8 and is conductive, the indicating lamp 7 is lighted, and replacement of the lip seal is prompted.

[0032] Of course, the above description is not a limitation on the utility model, and the utility model is not limited to the above examples, and the changes, modifications, additions or replacements made by the ordinary skilled in the art within the essential scope of the utility model should all belong to the protection scope of the utility model.

Claims

1. A lip wear monitoring system for a lip seal of a rotating shaft, characterized by The utility model relates to a kind of elastic conductor sheet (1), lip seal (3), first wire (4), second wire (5), measurement module (6) and rotating shaft (8) comprising, The elastic conductor sheet (1) is arranged on the lip seal (3) lip portion and the non-contact surface of the rotating shaft (8), and is isolated from the rotating shaft (8), The elastic conductor sheet (1), the first wire (4), the measurement module (6), the second wire (5) and the rotating shaft (8) are sequentially connected in conduction, When the lip seal (3) is worn to the preset position needing replacement, the elastic conductor sheet (1) is in contact with the rotating shaft (8) in conduction, and the indicator light (7) of the measurement module (6) is on.

2. The lip wear monitoring system of claim 1, wherein The elastic conductor sheet (1) is a conductive spring sheet, and the surface is coated with an insulating layer (2). The lip seal (3) is an insulator, and the rotating shaft (8) is a conductor.

3. The lip wear monitoring system of claim 1, wherein It comprises a lower support ring (9), an upper support ring (10) and a cavity (11) for fixing the elastic conductor sheet (1) and the lip seal (3).

4. The lip wear monitoring system of claim 1, wherein When the lip seal (3) is not worn to the preset position needing replacement, the elastic conductor sheet is isolated from the rotating shaft (8), and the indicator light (7) is off.

5. The lip wear monitoring system of claim 1, wherein, The second wire (5) is connected to the rotating shaft (8) in conduction through a brush.

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