Novel flexible bearing sealing system

Abstract

The utility model belongs to the technical field of roller bits, and particularly relates to a novel flexible bearing sealing system which comprises a flexible bearing sealing system outer ring, a flexible bearing sealing system inner ring and a flexible bearing sealing system bearing bush. The flexible bearing sealing system bearing bush is located on the upper portion of the inner ring of the flexible bearing sealing system, and the flexible bearing sealing system bearing bush is also installed between the cone and the bit leg shaft. The device is simple and effective in structure, small in occupied bearing space, long in service life, high in safety and considerable in economic benefit.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and in particular relates to a novel flexible bearing sealing system. Background Art

[0002] The roller drill bit is a tool for breaking rocks in the earth's crust and is widely used in oil and gas drilling and other mineral resource drilling and development fields.

[0003] Modern roller drill bits are "four-in-one" drill bits, with four features: sealing system, oil storage compensation pressure balance system, sliding bearing and high-pressure jet nozzle. The sealing system is one of the core components of the roller drill bit. The working conditions of the drill bit sealing system are very harsh, with high temperature, high pressure and high speed. One side is soaked in grease, and the other side is soaked in abrasive and corrosive drilling fluid. The safety and life of the sealing system are directly related to the safety and life of the roller drill bit. The analysis of the failure of three-roller drill bits shows that bearing damage is the main form of failure of roller drill bits, and the vast majority of premature bearing failures are caused by the failure of the bearing sealing system, the loss of bearing lubricating grease and the intrusion of foreign matter. Therefore, we often see that the wear of the roller drill teeth is not serious, but the bearing has failed and loosened.

[0004] As we all know, there are two main types of sealing systems for roller drill bits today. One is the conventional O-shaped rubber sealing ring, which has a simple structure but is not suitable for high-speed working conditions and has a short lifespan. The other is a bimetallic end face sealing system, which can adapt to high-speed working conditions, but has a complex structure, a large number of components (a large number of components means high difficulty in assembly and a large number of dangerous sources), and a high manufacturing process difficulty. The two sealing planes of the metal ring rely on high-precision surface processing quality, strict flatness and surface roughness requirements to achieve the sealing effect. The working principle is to use the compression elasticity of the two O-shaped rubber rings to provide kinetic energy to a pair of metal ring working surfaces, generate contact pressure, and allow a pair of metal rings to rotate in opposite directions while maintaining a certain pressure to produce a sealing function. The key point is that the two rubber rings can only be used as compression elastic static seals, and displacement is not allowed when supplying energy to the metal rings. Once displaced, the rubber rings will quickly wear out, causing the sealing system to collapse and fail. Utility Model Content

[0005] The utility model aims to provide a novel flexible bearing sealing system to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of flexible bearing sealing system, including a flexible bearing sealing system outer ring, a flexible bearing sealing system inner ring and a flexible bearing sealing system bushing, the working surfaces of the flexible bearing sealing system outer ring and the flexible bearing sealing system inner ring cooperate with each other, and the two are installed between the gear and the palm shaft, and the flexible bearing sealing system bushing is located on the upper part of the flexible bearing sealing system inner ring, and is also installed between the gear and the palm shaft.

[0007] Preferably, an outer ring groove for mounting on the outer ring of the flexible bearing sealing system is provided on the inner side of the cone.

[0008] Preferably, an inner ring groove for mounting the inner ring of the flexible bearing sealing system is provided at a position on the tooth palm shaft corresponding to the outer ring groove.

[0009] Preferably, the outer ring of the flexible bearing sealing system is composed of a high-performance composite material layer and hydrogenated nitrile rubber, and the high-performance composite material layer is arranged on the inner side of the hydrogenated nitrile rubber.

[0010] Preferably, the inner ring of the flexible bearing sealing system is composed of a high-performance composite material layer and hydrogenated nitrile rubber, and the high-performance composite material layer is arranged on the outer side of the hydrogenated nitrile rubber.

[0011] Preferably, the bearing pad of the flexible bearing sealing system is in the shape of a circular ring.

[0012] The beneficial effects of the utility model are: simple and effective structure, small bearing space occupation, long service life, high safety and considerable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the outer sealing ring of the flexible bearing sealing system in the utility model;

[0015] Figure 3 This is a schematic diagram of the inner sealing ring of the flexible bearing sealing system in the utility model:

[0016] Figure 4 It is a schematic diagram of the bearing bush of the flexible bearing sealing system in the utility model;

[0017] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0019] like Figure 1-5 As shown, a new type of flexible bearing sealing system is composed of a flexible bearing sealing system outer ring 5-1, a flexible bearing sealing system inner ring 5-2, and a flexible bearing sealing system bushing 5-3. The outer ring 5-1 of the bearing sealing system and the inner ring 5-2 of the flexible bearing sealing system are made of high-performance composite materials on the working surface, and have the characteristics of self-lubrication, high surface hardness, and smooth surface. The sealing ring body material is hydrogenated nitrile rubber, which has good high temperature resistance and elasticity, and can efficiently provide a long-lasting and stable contact pressure ratio for the working surface. Bidirectional elastic pressure can keep the contact pressure ratio of the sealing surface unchanged in time even if the gear wheel jumps, and the sealing performance is better and more stable. The flexible bearing sealing system bushing 5-3 is made of beryllium bronze. The material itself has a self-lubricating effect to reduce friction, and is suitable for long-term continuous work with high speed and large load. Therefore, the roller drill bit equipped with the new flexible bearing sealing system is more suitable for long-term stable work under high temperature and high pressure conditions.

[0020] In the device, the outer ring of the flexible bearing sealing system and the inner ring of the flexible bearing sealing system are both made of two materials, the working surface part is a high-performance composite material 6, and the sealing ring body material is hydrogenated nitrile rubber 7, which are made into one piece by vulcanization process.

[0021] The outer ring of the bearing seal system and the inner ring of the flexible bearing seal system are both rectangular in shape. The bearing bush of the flexible bearing seal system is made of wear-resistant materials and is in the shape of a ring.

[0022] When the roller drill is working, the roller 1 needs to rotate at high speed around the tooth palm axis 2, and the position of each row of teeth of the roller drill is specific. High-speed rotation cannot produce displacement at the same time, so the steel ball 3 is inserted into the bearing from the plug pin hole to prevent the bearing from displacement. After the steel ball 3 is inserted, the plug pin 4 is inserted into the plug pin hole to support the steel ball and form a bearing system that rotates stably around the axis.

[0023] When the roller bit bearing is working, it needs to rotate at high speed under pressure ranging from several tons to tens of tons, so the bearing must be filled with bearing grease to prevent the grease in the bearing from leaking and the high-pressure mud containing highly abrasive rock chips outside the bearing from entering the bearing. This requires a high-performance bearing sealing system.

[0024] First, all accessories are processed and manufactured according to the drawings;

[0025] Step 1: Apply bearing grease to the inner ring of the flexible bearing sealing system 5-2 and insert it into the toothed journal 2.

[0026] Step 2: Apply bearing grease to the inner ring of the flexible bearing sealing system bearing 5-3 and insert it into the journal 2.

[0027] Step 3: Install the outer ring 5-1 of the flexible bearing sealing system into the sealing groove of the cone 1;

[0028] Step 4: Slowly press the gear 1 along the journal of the palm shaft 2 into place by hand.

[0029] Step 5: Insert the steel ball 3 into the bearing along the pin hole.

[0030] Finally, the plug pin 4 is inserted into the plug pin hole and the plug pin is fixed by welding, and the installation is completed.

[0031] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A new type of flexible bearing sealing system, characterized by: It includes a flexible bearing sealing system outer ring, a flexible bearing sealing system inner ring and a flexible bearing sealing system bushing. The working surfaces of the flexible bearing sealing system outer ring and the flexible bearing sealing system inner ring cooperate with each other. The two are installed between the gear and the palm shaft. The flexible bearing sealing system bushing is located on the upper part of the flexible bearing sealing system inner ring and is also installed between the gear and the palm shaft.

2. The novel flexible bearing sealing system according to claim 1 is characterized in that: The inner side of the cone is provided with an outer ring groove for mounting on the outer ring of the flexible bearing sealing system.

3. The new flexible bearing sealing system according to claim 2 is characterized in that: An inner ring groove for mounting the inner ring of the flexible bearing sealing system is provided at a position on the tooth palm shaft corresponding to the outer ring groove.

4. The novel flexible bearing sealing system according to claim 1 is characterized in that: The outer ring of the flexible bearing sealing system is composed of a high-performance composite material layer and hydrogenated nitrile rubber, and the high-performance composite material layer is arranged on the inner side of the hydrogenated nitrile rubber.

5. The novel flexible bearing sealing system according to claim 1 is characterized in that: The inner ring of the flexible bearing sealing system is composed of a high-performance composite material layer and hydrogenated nitrile rubber, and the high-performance composite material layer is arranged on the outer side of the hydrogenated nitrile rubber.

6. The novel flexible bearing sealing system according to claim 1 is characterized in that: The bearing shell of the flexible bearing sealing system is annular.

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