阅读说明：本技术 一种柱塞压裂泵密封圈 (Plunger fracturing pump sealing washer ) 是由 李厚宁 罗盛昌 于 2019-09-20 设计创作，主要内容包括：本发明涉及密封圈技术领域,公开了一种柱塞压裂泵密封圈。柱塞压裂泵密封圈包括层叠分布的承压环和密封环,所述承压环和密封环同轴布置,所述密封环至少有两个,所述承压环包括位于内部的基体层和包裹在所述基体层外部的保护层,所述基体层的材料为弹性材料,所述保护层的材料为耐磨材料。承压环的基体层外还布置有保护层,保护层的材料为耐磨材料,耐磨材料的耐磨性好,强度高,承压环具有更好的耐磨性和更高的抗压强度,延长了密封圈的使用寿命。(The invention relates to the technical field of sealing rings and discloses a sealing ring of a plunger fracturing pump. The plunger fracturing pump sealing ring comprises a bearing ring and a sealing ring which are distributed in a stacked mode, the bearing ring and the sealing ring are arranged coaxially, the number of the sealing rings is at least two, the bearing ring comprises a base body layer located inside and a protective layer wrapped outside the base body layer, the base body layer is made of elastic materials, and the protective layer is made of wear-resistant materials. The protective layer is arranged outside the base body layer of the pressure-bearing ring, the protective layer is made of wear-resistant materials, the wear resistance of the wear-resistant materials is good, the strength is high, the pressure-bearing ring has better wear resistance and higher compressive strength, and the service life of the sealing ring is prolonged.)

1. The utility model provides a plunger fracturing pump sealing washer, includes range upon range of pressure ring and the sealing ring that distributes, pressure ring and sealing ring coaxial arrangement, its characterized in that, the sealing ring has two at least, pressure ring is in including being located inside base member layer and parcel the outside protective layer of base member layer, the material on base member layer is elastic material, the material of protective layer is wear-resisting material.

2. The plunger fracturing pump seal ring according to claim 1, wherein the material of the protective layer is cloth-sandwiched rubber or wear-resistant fiber.

3. The plunger fracturing pump seal ring according to claim 2, wherein the protective layer and the substrate layer are molded by a vulcanization process or a bonding process.

4. The plunger fracturing pump seal ring according to any one of claims 1 to 3, wherein the inner side of the pressure ring has an inwardly convex arcuate surface forming the dynamic sealing surface of the pressure ring.

5. The plunger fracturing pump seal ring of claim 4, wherein the bottom side of the pressure bearing ring has a sealing surface that mates with the sealing ring.

6. The plunger fracturing pump seal ring of claim 5, wherein the arc of the sealing surface and the arcuate convex surface is the same and smoothly transitioning.

7. The plunger fracturing pump seal ring according to any one of claims 1 to 3, wherein the top of the seal ring is provided with symmetrically arranged seal lips, and a spacing groove is formed between the seal lips.

8. The plunger fracturing pump seal ring of claim 7, wherein the top surface of the sealing lip is an inclined surface that slopes upwardly in a direction away from the spacer groove.

9. The plunger frac pump seal ring of any one of claims 1-3 wherein the bottom of said seal ring is provided with an arc shaped ring root.

10. The plunger fracturing pump seal ring according to any one of claims 1 to 3, wherein the material of the pressure-bearing ring is hydrogenated nitrile rubber.

Technical Field

The invention relates to the technical field of sealing rings, in particular to a sealing ring of a plunger fracturing pump.

Background

The plunger fracturing pump has the characteristics of high pressure, compact structure, high efficiency and convenient flow regulation, and is widely applied to the industries of hydraulic machines, engineering machinery, underground tools and the like. The sealing piece matched with the plunger fracturing pump is reliable in sealing during working, long in service life, resistant to high pressure and not easy to wear.

The utility model discloses a chinese utility model patent that the bulletin number of authorizing is CN204061867U, the date of authorizing is 2014.12.31 discloses a high-pressure fracturing pump sealing washer, this high-pressure fracturing pump sealing washer includes a plurality of coaxial stack settings's A ring, B ring and C ring, the A ring sets up in the top, the C ring sets up in the bottom, the A ring adopts elastic material to make and forms, be provided with a plurality of layers of B ring between A ring and C ring, each B ring includes that the bottom is the ring root of arcuation and the B ring lip mouth that sets up each other for the ring root top symmetry, be provided with the spacer groove between the B ring lip mouth of symmetrical arrangement.

When the sealing ring of the high-pressure fracturing pump is used, the elastic material adopted by the ring A is usually pure rubber, the ring B is made of cloth-sandwiched rubber, and the ring A and the ring B are in a laminated sealing mode to enhance the sealing performance of the sealing ring. However, when the structure is actually used, because the plunger fracturing pump has the characteristic of high pressure, and in the working condition of silt, the A ring formed by the rubber material with the traditional structure has weak pressure resistance, the plunger fracturing pump can generate a breakdown phenomenon and generate leakage in a high-pressure environment; meanwhile, in the working process of the plunger fracturing pump, the plunger reciprocates and repeatedly rubs with the ring A, and the ring A made of pure rubber is weak in abrasion resistance, so that the service life of the sealing ring is short.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the combined sealing ring of the existing plunger fracturing pump is made of pure rubber materials, and the compression resistance and the abrasion resistance are weak, so that the service life of the sealing ring is short.

In order to solve the technical problems, the technical scheme of the plunger fracturing pump sealing ring provided by the invention is as follows:

the utility model provides a plunger fracturing pump sealing washer, includes bearing ring and the sealing ring of range upon range of distribution, bearing ring and sealing ring coaxial arrangement, the sealing ring has two at least, the bearing ring is in including being located inside base member layer and parcel the outside protective layer of base member layer, the material on base member layer is elastic material, the material of protective layer is wear-resisting material.

Further, the protective layer is made of cloth-sandwiched rubber or wear-resistant fibers.

Furthermore, the protective layer and the substrate layer are manufactured and molded by adopting a vulcanization process or a bonding process.

Further, the inner side of the pressure-bearing ring is provided with an arc-shaped convex surface protruding inwards, and the arc-shaped convex surface forms a dynamic sealing surface of the pressure-bearing ring.

Further, the inner side of the pressure-bearing ring is provided with an arc-shaped convex surface protruding inwards, and the arc-shaped convex surface forms a dynamic sealing surface of the pressure-bearing ring.

Further, the radian of the sealing surface is the same as that of the arc convex surface, and the sealing surface and the arc convex surface are in smooth transition.

Furthermore, the top of the sealing ring is provided with symmetrically arranged sealing lips, and a spacing groove is formed between the sealing lips.

Further, the top surface of the seal lip is an inclined surface inclined upward in a direction away from the partition groove.

Further, the material of the pressure bearing ring is hydrogenated nitrile rubber.

Further, the inner side of the pressure-bearing ring is provided with an arc-shaped convex surface protruding inwards, and the arc-shaped convex surface forms a dynamic sealing surface of the pressure-bearing ring.

Compared with the prior art, the plunger fracturing pump sealing ring provided by the embodiment of the invention has the beneficial effects that: the protective layer is arranged outside the base body layer of the pressure-bearing ring, the protective layer is made of wear-resistant materials, the wear resistance of the wear-resistant materials is good, the strength is high, the pressure-bearing ring has better wear resistance and higher compressive strength, and the service life of the sealing ring is prolonged.

The plunger fracturing pump sealing ring provided by the embodiment of the invention has the beneficial effects that the cost of the cloth-sandwiched rubber is low, and the wrapping mode is simple; the protective layer and the substrate layer are molded by a vulcanization process, and the vulcanization process can increase the elasticity of the pressure-bearing ring; the sealing lip can increase the contact area between the sealing ring and the pressure-bearing ring and between different sealing rings, and the spacing groove is beneficial to opening the lip mouth more easily when pressure is applied, so that the sealing force is compensated, and the sealing capability is improved; the arc-shaped ring root part can enhance the high pressure resistance of the sealing ring and reduce the axial compressed amount of the sealing ring in the use process of the sealing ring, thereby reducing the friction between the inner side of the sealing ring and a shaft and enhancing the use performance of the sealing ring; the pressure-bearing ring is made of hydrogenated nitrile rubber material, the hydrogenated nitrile rubber is elastic material, and the pressure-bearing ring has proper sealing stress on the premise of not applying axial pretightening force, so that air is not sucked in a liquid suction stroke; the arc convex surface enables the bearing ring to have radial interference, enables the bearing ring to generate sealing stress in an original state, reduces the contact area on the premise of ensuring the sealing stress, and balances the sealing stress and the friction force.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a plunger fracturing pump seal ring of the present invention.

In the figure, 1, a pressure-bearing ring; 2. a seal ring; 3. a substrate layer; 4. a protective layer; 5. an arc convex surface; 6. a sealing lip; 7. a spacing groove.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

According to a preferred embodiment of the sealing ring of the plunger fracturing pump of the invention, as shown in fig. 1, the sealing ring of the plunger fracturing pump comprises a pressure-bearing ring 1 and a sealing ring 2 which are distributed in a stacked manner, wherein the pressure-bearing ring 1 and the sealing ring 2 are coaxially arranged, in the embodiment, the number of the sealing rings 2 is two, and in other embodiments, three, four, etc. sealing rings 2 can be provided according to the requirement of sealing strength. One side of the sealing ring of the plunger fracturing pump, which is close to the pressure bearing ring 1, is defined as a top side, namely the pressure bearing ring 1 is arranged at the top of the combined sealing ring of the plunger fracturing pump, and the pressure bearing direction of the sealing ring of the plunger fracturing pump is from the pressure bearing ring 1 to the sealing ring 2.

The pressure-bearing ring 1 comprises a substrate layer 3 positioned inside and a protective layer 4 wrapped outside the substrate layer 3, the substrate layer 33 is made of an elastic material, in the embodiment, the elastic material is hydrogenated nitrile rubber, the protective layer 4 is made of cloth-sandwiched rubber, and the protective layer 4 and the substrate layer 3 are molded by adopting a vulcanization process to increase the elasticity of the pressure-bearing ring 1; in other embodiments, the collective layer 3 and the protective layer 4 may be formed by a bonding process. Hydrogenated nitrile rubber is elastic material, and pressure-bearing ring 1 has suitable sealing stress under the prerequisite of not exerting axial pretightning force, guarantees not to inhale air in the imbibition stroke. The cloth-sandwiched rubber has mature manufacturing mode and low cost, can be directly fixed outside the base body layer 3 by adopting the adhesive, and has simple wrapping mode. In other embodiments, the material of the protective layer 4 may also be high-strength wear-resistant fibers, such as viscose, polyamide, polyvinyl alcohol, and the like.

The inner side of the pressure-bearing ring 1 is provided with an arc convex surface 5 which protrudes inwards, and the arc convex surface 5 forms a dynamic sealing surface of the pressure-bearing ring 1. The bottom side of the pressure-bearing ring 1 is provided with a sealing surface matched with the sealing ring 2, and the radian of the sealing surface is the same as that of the arc convex surface 5 and the smooth transition is realized. The arc convex surface 5 forms a dynamic sealing surface of the bearing ring 1, the arc convex surface 5 enables the bearing ring 1 to have radial interference, the bearing ring 1 can generate sealing stress in an original state, the contact area is reduced on the premise of ensuring the sealing stress, and the sealing stress and the friction force are balanced.

The top of sealing ring 2 has symmetrical seal lip 6, and seal ring 2 offers the compartment groove 7 that is used for storing fracturing fluid between two seal lips 6, and the top surface of seal lip 6 is the inclined plane of the direction tilt up along keeping away from compartment groove 7. When the pressure-bearing ring 1 is seriously abraded and the spacing groove 7 is beneficial to pressure, the lip is easier to open, the sealing force is compensated, and the sealing capability is improved. The bottom of the sealing ring 2 is provided with an arc-shaped ring root part which can enhance the high pressure resistance of the sealing ring 2 and reduce the axial compressed amount of the sealing ring 2 in the use process of the sealing ring, thereby reducing the friction between the inner side of the sealing ring 2 and the plunger rod.

In summary, the embodiment of the invention provides a plunger fracturing pump sealing ring, wherein a protective layer is arranged outside a substrate layer of a pressure-bearing ring, the protective layer is made of a wear-resistant material, the wear-resistant material has good wear resistance and high strength, the pressure-bearing ring has better wear resistance and higher compressive strength, and the service life of the sealing ring is prolonged.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.