阅读说明：本技术 一种往复泵齿轮护罩动密封结构 (Dynamic seal structure of gear shield of reciprocating pump ) 是由 黄秀芳 于 2021-11-12 设计创作，主要内容包括：本发明公开了一种往复泵齿轮护罩动密封结构,涉及石油工程设备领域,具体包括小齿轮轴部件局部、小齿轮轴轴承座及油脂密封部件、机架小齿轮轴轴承座压盖部件、机架安装齿轮护罩局部、小齿轮、小齿轮轴辅助支撑部件、齿轮护罩座部件、齿轮护罩盖部件、内包骨架旋转唇形密封圈、小齿轮轴被密封外圆、内包骨架旋转唇形密封圈内圆等,分析动密封的思路是从尺寸链的组成来分析,小齿轮轴被密封外圆和内包骨架旋转唇形密封圈内圆的同轴度是封闭环,封闭环的值大小是由10个组成环的值决定的,经过设计,10个组成环的精度控制得非常好,因此封闭环同轴度精度必然很高,满足动密封得效果不仅质量好,而且内包骨架旋转唇形密封圈的使用还寿命长。(The invention discloses a reciprocating pump gear shield dynamic sealing structure, which relates to the field of petroleum engineering equipment and particularly comprises a pinion shaft part, a pinion shaft bearing seat and a grease sealing part, a rack pinion shaft bearing seat gland part, a rack-mounted gear shield part, a pinion shaft auxiliary supporting part, a gear shield seat part, a gear shield cover part, an inner wrapping framework rotary lip-shaped sealing ring, a sealed outer circle of a pinion shaft, an inner wrapping framework rotary lip-shaped sealing ring and the like, wherein the dynamic sealing analysis idea is analyzed from the composition of a dimension chain, the coaxiality of the sealed outer circle of the pinion shaft and the inner wrapping framework rotary lip-shaped sealing ring is a closed ring, the value of the closed ring is determined by the value of 10 combined rings, and through design, the precision of the 10 combined rings is controlled to be very good, so that the precision of the coaxiality of the closed ring is necessarily very high, the rotary lip-shaped sealing ring satisfies the dynamic sealing effect, has good quality, and has long service life.)

1. A dynamic seal structure of a gear shield of a reciprocating pump is characterized in that a pinion shaft part (1), a pinion shaft bearing seat and a grease seal part (2), a rack pinion shaft bearing seat gland part (3), a rack-mounted gear shield part (4), a pinion (5), a pinion shaft auxiliary support part (6), a gear shield seat part (7), a gear shield cover part (8), a pinion shaft end static seal part (9), a pinion shaft (1.1), an excircle surface (1.1.1), an end face (1.1.2), an excircle (1.1.3), a rolling bearing (1.2), an inner circle (1.2.1), an excircle (1.2.2), a pinion shaft bearing seat (2.1), a small inner circle (2.1.1), a large inner circle (2.1.2), an end face (2.1.3), an M12 inner hexagon socket head cap screw gasket group (6.1), a support body (6.2), an inner circle (6.2.1), an excircle (6.2.2.2), a large end face (6.2.3), little terminal surface (6.2.4), retaining ring (6.3), slide bearing (6.4), circlip (6.5) for the hole, rotatory lip-type sealing washer of endocyst skeleton (6.6), excircle (6.6.1), interior circle (6.6.2), connection terminal surface (8.1), pinion end boss sealed pad (9.1), clamp plate sealing plane (9.2), M10 bolt packing ring group (9.3), M10 bolt packing ring group (9.4).

2. The dynamic seal structure of the gear guard of the reciprocating pump as claimed in claim 1, wherein the inner circle (6.6.2) of the inner-bag-framework rotating lip-shaped seal ring (6.6) is fixed, the outer circular surface (1.1.1) of the pinion shaft (1.1) is tightly attached to the inner circle (6.6.2) of the inner-bag-framework rotating lip-shaped seal ring (6.6) to make a rotating motion, which is a dynamic seal position, the design structure ensures that the coaxiality between the outer circular surface (1.1.1) of the pinion shaft (1.1) and the inner circle (6.6.2) of the inner-bag-framework rotating lip-shaped seal ring (6.6) is very high, the analysis idea is analyzed from the composition of a dimension chain, the coaxiality between the outer circular surface (1.1) and the inner circle (6.6.2) is a closed ring, and the value of the closed ring is determined by the value of 10 combined rings.

3. The dynamic seal structure of the gear guard of the reciprocating pump according to claim 1, wherein the first component ring is the coaxiality of the outer circle surface (1.1.1) and the outer circle (1.1.3) of the pinion shaft (1.1), the two surfaces are arranged on the same side of the pinion shaft (1.1), and the two outer circles are installed and processed at one time; the fifth component ring is the coaxiality of the small inner circle (2.1.1) and the large inner circle (2.1.2) of the small gear shaft bearing seat (2.1), and the small inner circle (2.1.1) and the large inner circle (2.1.2) of the small gear shaft bearing seat (2.1) are installed and processed at one time; the sixth forming ring is a gap between a large inner circle (2.1.2) of the pinion shaft bearing seat (2.1) and an outer circle (6.2.2) of the support body (6.2), and the large inner circle (2.1.2) and the outer circle (6.2.2) are designed to be in interference fit; the seventh component ring is the coaxiality of the outer circle (6.2.2) and the inner circle (6.2.1) of the support body (6.2), and the outer circle (6.2.2) and the inner circle (6.2) of the support body (6.2) are installed and processed at one time.

4. A reciprocating pump gear guard dynamic seal structure as claimed in claim 1, the connecting end face (8.1) of the gear guard cover member (8) and the small end face (6.2.4) of the support body (6.2) are on a single plane, both planes are in contact with the small gear end boss gasket (9.1) at the same time, the pressure plate sealing plane (9.2) is in contact with the other face of the small gear end boss gasket (9.1), the pressure plate sealing plane (9.2), the connecting end face (8.1) and the small gear end boss gasket (9.1) are compressed by 9M 10 bolt gasket sets (9.3), the pressure plate sealing plane (9.2), the small end face (6.2.4) of the support body (6.2) and the small gear end boss gasket (9.1) are compressed by 9M 10 bolt gasket sets (9.4), and static seal is completed.

Technical Field

The invention relates to the field of petroleum engineering equipment, in particular to a dynamic sealing structure of a gear shield of a reciprocating pump.

Background

Two reciprocating pumps with very similar structures, namely a drilling pump and a fracturing pump, appear in the field of petroleum engineering equipment. The most similar point is that the belt transmission stage of the two-stage transmission of the belt transmission and gear transmission from the original main motor to the crankshaft is cancelled, and the small gears are directly arranged at the two ends outside the shaft support bearing of the motor to drive the big gear on the crankshaft. Useful functions of this improvement are: the original transmission chain is greatly shortened, so that the pump sets of the two reciprocating pumps are greatly reduced in size and weight, the power consumption of belt transmission is reduced, and the improvement has a harmful function: the gear mounted position after cancelling belt pulley drive is that the gear is put in the outside of two bearing housings, the moment of torsion of big and small gear transmission is big, need lubricate the gear with a large amount of lubricating oil and take away the frictional heat that gear drive produced, just need a big gear guard shield, nevertheless in practice for many years, find that the gear guard shield is not good to be solved the dynamic seal, can't install the instrument of dish pump in the outside of gear guard shield, the gear guard shield must all be unpacked apart to the dish pump every time, in order to solve this problem that exists, research a reciprocating pump gear guard shield static seal structure has become the problem that awaits the opportune moment and solve.

Disclosure of Invention

The invention aims to provide a static sealing structure of a gear guard of a reciprocating pump.

The technical scheme of the invention is as follows:

a dynamic seal for the gear shield of reciprocating pump features that when the wearing parts such as cylinder sleeve, piston, plunger, valve body and valve seat are replaced, the small gear must be rotated, the tool for disk pump must be installed to the end face of rotary small gear shaft, and the end face of rotary small gear shaft must be exposed to the outside of gear shield for higher convenience.

The inner circle of the inner-bag framework rotating lip-shaped sealing ring is fixed, the outer circle surface of the pinion shaft is tightly attached to the inner circle of the inner-bag framework rotating lip-shaped sealing ring to do rotating motion, namely the dynamic sealing position, the coaxiality of the outer circle surface of the pinion shaft and the inner circle of the inner-bag framework rotating lip-shaped sealing ring is better, not only is the dynamic sealing effect better, but also the service life of the inner-bag framework rotating lip-shaped sealing ring is longer, therefore, the design structure of the invention ensures that the coaxiality of the outer circle surface of the pinion shaft and the inner circle of the inner-bag framework rotating lip-shaped sealing ring is very high, the analysis idea is to analyze from the composition of a size chain, the coaxiality between the outer circle surface and the inner circle is a closed ring, the value of the closed ring is determined by the value of 10 composition rings, and therefore the precision of each composition ring is well controlled.

The first component ring is the coaxiality of the outer circle surface and the outer circle of the pinion shaft, and the two surfaces are arranged on the same side of the pinion shaft, so that the two outer circles can be installed and processed at one time, and the coaxiality precision is high; the second component ring is a gap between the excircle of the pinion shaft and the inner circle of the rolling bearing, and the gap is zero because the excircle of the pinion shaft and the inner circle of the rolling bearing are assembled in an interference fit manner; the third component ring is the coaxiality of the inner circle and the outer circle of the rolling bearing, the rolling bearing is a standard component, and the coaxiality is naturally very high; the fourth component ring is a fit clearance between the excircle of the rolling bearing and the small inner circle of the bearing seat of the pinion shaft, and the clearance is very small because the fit adopts the fit of the excircle of the standard rolling bearing and the inner hole of the bearing seat; the fifth component ring is the coaxiality of the small inner circle and the large inner circle of the pinion shaft bearing seat, and the small inner circle and the large inner circle of the pinion shaft bearing seat are installed and processed at one time, so that the coaxiality of high precision can be well ensured; the sixth forming ring is a clearance between a large inner circle of the bearing seat of the pinion shaft and an outer circle of the supporting body, the large inner circle and the outer circle are designed to be in interference fit, and the fit clearance is zero; the seventh component ring is the coaxiality of the outer circle and the inner circle of the support body, and the coaxiality is also very high because the outer circle and the inner circle of the support body can be installed and processed at one time; the eighth component ring is a gap between the inner circle of the support body and the outer circle of the rotary lip-shaped sealing ring of the inner wrapping framework, the inner circle and the outer circle are in interference fit, and the gap is zero; the ninth forming ring is the coaxiality of the outer circle and the inner circle of the rotary lip-shaped sealing ring of the inner wrapping framework, and the coaxiality of the outer circle and the inner circle is very high because the rotary lip-shaped sealing ring of the inner wrapping framework is a standard part. Through analysis, the precision of the 10 combined rings is controlled to be very good, so that the precision of the coaxiality closed ring between the outer circle surface and the inner circle is necessarily very high, the dynamic sealing effect is good, and the service life of the rotary lip-shaped sealing ring with the internally-wrapped framework is long.

The connecting end face of the gear shield cover component and the small end face of the support body are on the same plane, the two planes are simultaneously contacted with the small gear end boss sealing gasket, the pressing plate sealing plane is contacted with the other face of the small gear end boss sealing gasket, the pressing plate sealing plane, the connecting end face and the small gear end boss sealing gasket are compressed by 9M 10 bolt gasket groups, the pressing plate sealing plane, the small end face of the support body and the small gear end boss sealing gasket are compressed by 9M 10 bolt gasket groups, and static sealing is completed.

Drawings

FIG. 1 is a perspective view of a reciprocating pump gear guard dynamic seal arrangement;

FIG. 2-P-way view of FIG. 1 (assembled);

FIG. 3-section A-A of FIG. 2;

FIG. 4-partial enlarged view B of FIG. 3;

fig. 5-C of fig. 4 are enlarged partial views.

The reference numbers are as follows:

1-pinion shaft part, 2-pinion shaft bearing seat and grease sealing part, 3-rack pinion shaft bearing seat gland part, 4-rack installation gear shield part, 5-pinion, 6-pinion shaft auxiliary supporting part, 7-gear shield seat part, 8-gear shield cover part, 9-pinion shaft end static sealing part, 1.1-pinion shaft, 1.1.1-excircle surface, 1.1.2-end face, 1.1.3-excircle, 1.2-rolling bearing, 1.2.1-inner circle, 1.2.2-excircle, 2.1-pinion shaft bearing seat, 2.1.1-small inner circle, 2.1.2-big inner circle, 2.1.3-end face, 6.1-M12 inner hexagon screw gasket group, 6.2-supporting body, 6.2.1-inner circle, 6.2.2-excircle, 6.2.3-big end face, 6.2.4-small end face, 6.3-check ring, 6.4-sliding bearing, 6.5-elastic check ring for hole, 6.6-internal wrapping framework rotary lip-shaped seal ring, 6.6.1-excircle, 6.6.2-inner circle, 8.1-connecting end face, 9.1-small gear end boss seal gasket, 9.2-press plate sealing plane, 9.3-M10 bolt washer group and 9.4-M10 bolt washer group.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

The embodiments of the present invention are not limited to the following examples, and various changes made without departing from the spirit of the present invention are within the scope of the present invention.

The implementation of the present invention takes a reciprocating pump above 2200hp as an example, and since the gear guard is bilaterally symmetrical, only one side is taken as an example for illustration.

Referring to fig. 1 to 5, the dynamic seal structure of the gear shield of the reciprocating pump of the present embodiment includes a pinion shaft part 1, a pinion shaft bearing seat and grease seal part 2, a rack pinion shaft bearing seat gland part 3, a rack-mounted gear shield part 4, a pinion 5, a pinion shaft auxiliary support part 6, a gear shield seat part 7, a gear shield cover part 8, a pinion shaft end static seal part 9, a pinion shaft 1.1, an outer circle surface 1.1.1, an end surface 1.1.2, an outer circle 1.1.3, a rolling bearing 1.2, an inner circle 1.2, an outer circle 1.2, a pinion shaft bearing seat 2.1, a small inner circle 2.1.1, a large inner circle 2.1.2, an end surface 2.1.3, an M12 inner hexagon screw gasket group 6.1, a support body 6.2, an inner circle 6.2.1, an outer circle 6.2.2, a large end surface 6.2.3, a small end surface 6.2.4, an inner packing ring 6.3, a 6.4, an elastic hole for a lip-shaped hole, a lip-shaped seal ring 6.5, a rotating seal ring 6.6.1, 6.6.2 of inner circle, 8.1 of connecting end surface, 9.1 of small gear end boss sealing gasket, 9.2 of pressing plate sealing plane, 9.3 of M10 bolt gasket group and 9.4 of M10 bolt gasket group.

Referring to fig. 1, 2, 3 and 4, a reciprocating pump gear shield dynamic seal is to satisfy a disc pump function with very high frequency of reciprocating pump use, the disc pump function is that a reciprocating pump must rotate a pinion when replacing wearing parts such as a cylinder sleeve, a piston, a plunger, a valve body and a valve seat, a tool of the disc pump needs to be installed on an end surface 1.1.2 of a rotating pinion shaft 1.1, the end surface 1.1.2 of the rotating pinion shaft 1.1 needs to be exposed outside the gear shield more conveniently, and dynamic seal of lubricating oil for lubricating a gear in rotation is generated.

Referring to fig. 5 (related fig. 4, fig. 3, fig. 2, fig. 1), the inner circle 6.6.2 of the inner wrapping framework rotating lip-shaped seal ring 6.6 is fixed, the outer circle surface 1.1.1 of the pinion shaft 1.1 is tightly attached to the inner circle 6.6.2 of the inner wrapping framework rotating lip-shaped seal ring 6.6 to perform a rotating motion, which is a key dynamic sealing position, the better the coaxiality between the outer circle surface 1.1.1 of the pinion shaft 1.1 and the inner circle 6.6.2 of the inner wrapping framework rotating lip-shaped seal ring 6.6 is, not only the better the dynamic sealing effect is, but also the longer the service life of the inner wrapping framework rotating lip-shaped seal ring 6.6 is, therefore, the design structure of the present invention is to ensure that the coaxiality between the outer circle surface 1.1.1 and the inner circle 6.6.2 of the inner wrapping framework rotating lip-shaped seal ring 6.6 is very high, the analysis idea is based on the composition of a size chain, the size of the closed ring is determined by the group value of 10, the values of each component ring are qualitatively described below.

Referring to fig. 1, 2, 3 and 4, the first component ring is the coaxiality of the outer circle surface 1.1.1 and the outer circle 1.1.3 of the pinion shaft 1.1, and because the two surfaces are on the same side of the pinion shaft 1.1, the two outer circles can be installed and processed at one time, so that the coaxiality precision is high; the second component ring is a gap between the excircle 1.1.3 of the pinion shaft 1.1 and the inner circle 1.2.1 of the rolling bearing 1.2, and the gap is zero because the excircle 1.1.3 of the pinion shaft 1.1 and the inner circle 1.2.1 of the rolling bearing 1.2 are assembled in an interference fit manner; the third component ring is the coaxiality of an inner circle 1.2.1 and an outer circle 1.2.2 of the rolling bearing 1.2, the rolling bearing 1.2 is a standard component, and the coaxiality is naturally very high; the fourth component ring is the fit clearance of the excircle 1.2.2 of the rolling bearing 1.2 and the small inner circle 2.1.1 of the small gear shaft bearing seat 2.1, and the clearance is very small because the fit adopts the fit of the excircle of the standard rolling bearing and the inner hole of the bearing seat; the fifth component ring is the coaxiality of the small inner circle 2.1.1 and the large inner circle 2.1.2 of the pinion shaft bearing seat 2.1, and the small inner circle 2.1.1 and the large inner circle 2.1.2 of the pinion shaft bearing seat 2.1 are installed and processed at one time, so that the small inner circle 2.1.1 and the large inner circle 2.1.2 can well ensure the coaxiality with high precision; the sixth component ring is a clearance between a large inner circle 2.1.2 of a pinion shaft bearing seat 2.1 and an excircle 6.2.2 of a support body 6.2, the large inner circle 2.1.2 and the excircle 6.2.2 are designed to be in interference fit, and the clearance is zero; the seventh component ring is the coaxiality of the outer circle 6.2.2 and the inner circle 6.2.1 of the support body 6.2, and the coaxiality is very high because the outer circle 6.2.2 and the inner circle 6.2.1 of the support body 6.2 can be installed and processed at one time; the eighth component ring is a gap between an inner circle 6.2.1 of the support body 6.2 and an outer circle 6.6.1 of the inner-wrapping framework rotary lip-shaped sealing ring 6.6, the inner circle 6.2.1 and the outer circle 6.6.1 are in interference fit, and the gap is zero; the ninth component ring is the coaxiality of the outer circle 6.6.1 and the inner circle 6.6.2 of the inner-wrapping framework rotary lip-shaped sealing ring 6.6, and the coaxiality of the outer circle 6.6.1 and the inner circle 6.6.2 is very high because the inner-wrapping framework rotary lip-shaped sealing ring 6.6 is a standard component. Through analysis, the precision of 10 component rings is controlled to be very good, so that the precision of the coaxiality closed ring between the outer circle surface 1.1.1 and the inner circle 6.6.2 is necessarily very high, the dynamic sealing effect is good, and the service life of the rotary lip-shaped sealing ring 6.6 with the internally-wrapped framework is long.

Referring to fig. 5 (related fig. 4, fig. 3, fig. 2, fig. 1), the connecting end face 8.1 of the gear guard cover member 8 and the small end face 6.2.4 of the support body 6.2 are on the same plane, both planes are in contact with the pinion-end boss gasket 9.1 at the same time, the pressure plate sealing plane 9.2 is in contact with the other face of the pinion-end boss gasket 9.1, the pressure plate sealing plane 9.2, the connecting end face 8.1 and the pinion-end boss gasket 9.1 are pressed by 9M 10 bolt gasket sets 9.3, the pressure plate sealing plane 9.2, the small end face 6.2.4 of the support body 6.2 and the pinion-end boss gasket 9.1 are pressed by 9M 10 bolt gasket sets 9.4, and static sealing is completed.

The above detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art, and these changes are within the protection of the present invention and also within the protection scope of the present invention.