CN216714687U - Novel plunger pump crosshead - Google Patents

Abstract

The utility model relates to the technical field of plunger pump crosshead, and provides a novel plunger pump crosshead which comprises a crosshead shell, a crank, a tappet and a crosshead pin, wherein one end of the crank is fixed on the crosshead pin through a key; the utility model adopts the shaft sleeve to replace a bearing, thereby prolonging the service life of the whole crosshead and improving the durability of equipment.

Description

Novel plunger pump crosshead

Technical Field

The utility model relates to the technical field of plunger pump crosshead, in particular to a novel plunger pump crosshead.

Background

The crosshead is one of the important fittings in the plunger pump, and generally, the crosshead has two mounting modes, one is disclosed as the following: CN208442014U, which discloses a plunger pump cross head capable of fixing a pin shaft, wherein a pin hole of the cross head and the pin shaft are in transition fit, i.e. fixedly connected, and a matched crankshaft and the pin shaft are connected in a rotation manner, thereby realizing a reciprocating motion, and another one is as shown in fig. 1 and 2, a pin hole of the cross head and the pin shaft are connected by a bearing, a crankshaft and the pin shaft are connected in a fixed manner, and a reciprocating motion is realized by rotation between the pin shaft and the pin shaft hole, which has advantages for the two, and is suitable for different occasions, and for the second one adopting the bearing connection, poor bearing lubrication is found in use; the ball frame and the inner sleeve of the bearing are fragile, the service life is short, the replacement is frequent, and the broken metal fragments are clamped between the crosshead and the slideway, so that the working surfaces of the crosshead and the slideway are scratched, even pulled out of the groove, the roughness of the working surfaces is increased, the stress is increased, the instant impact force of the shaft pin bearing which originally bears the impact load is increased, and the service life of the bearing is shortened; in addition, for damaged bearings, the replacement difficulty is high, and especially under the condition of multiple cylinders, the crosshead of the front cylinder and the crosshead of the rear cylinder need to be removed simultaneously for replacement of the middle cylinder, so that time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel plunger pump crosshead, which adopts a shaft sleeve to replace a bearing, prolongs the service life of the whole crosshead, and improves the durability of equipment.

The embodiment of the utility model is realized by the following technical scheme: the utility model provides a novel plunger pump cross head, includes crosshead housing, crank, tappet and cross head pin, and articulate one end is passed through the key and is fixed on the cross head pin, and crosshead housing's both sides are equipped with the column pin hole, are equipped with the axle sleeve in the column pin hole, and the both ends of cross head pin set up respectively in the axle sleeve, and the outside in the column pin hole of crosshead housing both sides is equipped with the gland, and the gland can be dismantled and set up on crosshead housing.

Furthermore, the column pin hole, the gland and the shaft sleeve form a sealing structure.

Further, the gland includes the bottom plate and sets up the collar on the bottom plate, and the collar setting is between axle sleeve and post pinhole, and the bottom plate can be dismantled and connect in cross head casing.

Furthermore, a first through hole is formed in the bottom plate, the axis of the mounting ring is used as the projection direction, and the projections of the first through hole and the shaft sleeve are overlapped.

Furthermore, the bottom plate is provided with an avoiding through hole which is coaxially arranged with the mounting ring, and the diameter of the avoiding through hole is smaller than the inner diameter of the shaft sleeve.

Furthermore, still be equipped with the wick, be equipped with the recess on the inner wall of collar, the one end setting of wick is in the recess, and the other end setting of wick is in the inside of cross head casing.

Furthermore, a second through hole is formed in the side wall of the shaft sleeve.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects: the shaft sleeve is utilized to replace bearings at two ends of the shaft pin, so that the durability of the whole device is improved, the generation of metal fragments is avoided, and the service life of the crosshead is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic side view of a conventional crosshead;

FIG. 2 is a partial cross-sectional structural view of a conventional crosshead;

FIG. 3 is a schematic diagram of a cross-head of the novel plunger pump according to the first embodiment of the present invention;

FIG. 4 is a schematic diagram of a cross-sectional view of a part of the novel plunger pump crosshead provided by the utility model;

FIG. 5 is a schematic axial side view of a middle pressure cover of the novel crosshead for a plunger pump according to the present invention;

FIG. 6 is a schematic top view of the middle pressure cover of the crosshead of the novel plunger pump provided by the utility model;

FIG. 7 is a schematic cross-sectional structural view of a cross-section of a middle shaft sleeve of the crosshead of the novel plunger pump provided by the utility model;

FIG. 8 is a schematic structural view of a second through hole of a middle pressure cover of the novel plunger pump crosshead provided by the utility model;

icon: 1-tappet, 2-crank, 3-crosshead housing, 4-bolt, 5-gland, 6-crosshead pin, 7-bearing, 8-lube, 9-key, 51-bottom plate, 52-mounting ring, 53-groove, 54-first through hole, 55-escape through hole, 7-shaft sleeve, 71-second through hole, 72-wick.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or element which is referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 3 and 7, a novel plunger pump crosshead comprises a crosshead housing 3, a crank 2, a tappet 1 and a crosshead pin 6, wherein one end of the crank 2 is fixed on the crosshead pin 6 through a key 9, pin holes are formed in two sides of the crosshead housing 3, a shaft sleeve 7 is arranged in each pin hole, the material of the shaft sleeve 7 is not limited at all, the main performance is wear resistance, and the shaft sleeve 7 is generally made of copper-based alloy; the two ends of the crosshead pin 6 are respectively arranged in the shaft sleeves 7, the shaft sleeves 7 are used for completing the rotary fixation of the crosshead pin 6, the outer sides of the pin holes on the two sides of the crosshead shell 3 are provided with the pressing covers 5, and the pressing covers 5 are detachably arranged on the crosshead shell 3 and are connected through bolts 4 for example; generally, in order to ensure the smooth operation of equipment, some lubricating oil 8 is arranged inside the shell of the crosshead, the lubricating oil 8 is used for reducing the friction force between the shaft sleeve 7 and the crosshead pin 6, and further, in order to ensure that the lubricating oil 8 does not leak, the end part of the pin hole, the gland 5 and the shaft sleeve 7 form a sealing structure, it should be noted that the type of the sealing structure is not limited, for example, a rubber sealing ring is arranged; or in the following arrangement.

Specifically, as shown in fig. 5 and 6, the gland 5 includes a bottom plate 51 and a mounting ring 52 disposed on the bottom plate 51, the mounting ring 52 is disposed between the bushing 7 and the stud hole, and the bottom plate 51 is detachably connected to the crosshead housing 3; the installation fixing and the relative sealing are realized by the cooperation among the installation ring 52, the shaft sleeve 7 and the crosshead pin 6, and the auxiliary fixing and positioning are carried out by the bottom plate 51, in the embodiment, the shaft sleeve 7 is arranged in the inner ring of the installation ring 52, and the end part of the crosshead pin 6 is installed in the inner ring of the shaft sleeve 7; in order to adapt to the quick replacement of the shaft sleeve 7 (wearing part) in the crosshead under the condition of multiple cylinders, the shaft sleeve 7 excessively worn needs to be removed, so in the embodiment, the bottom plate 51 is provided with the first through hole 54, the axis of the mounting ring 52 is taken as the projection direction, the projection of the first through hole 54 and the projection of the shaft sleeve 7 are overlapped, and in the actual removal process, a rod piece is poked out from the first through hole 54, so that the shaft sleeve 7 arranged in the inner ring of the mounting ring 52 can be taken out and then replaced, and of course, the mode is not necessary, and the shaft sleeve 7 can be directly removed without the through hole; further, the bottom plate 51 is provided with an avoiding through hole 55, the avoiding through hole 55 is coaxially arranged with the mounting ring 52, and the diameter of the avoiding through hole 55 is smaller than the inner diameter of the shaft sleeve 7, wherein the avoiding through hole 55 can better assist in installation and quick removal, as shown in fig. 6, the avoiding through hole 55 and the first through hole 54 are connected together, or as shown in fig. 8, are not connected together; in some embodiments, the bypass through hole 55 can be used for cleaning the lubricating oil 8 and impurities, the first through hole 54 is used for quickly removing the shaft sleeve 7, and further, as shown in fig. 4, the end surface of the crosshead pin 6 is flush with the end surface of the bypass through hole 55, so that the accumulation of impurities is avoided.

In addition, the lubrication mode of the shaft sleeve 7 is oil lubrication, specifically, as shown in fig. 3 to 6, in the present embodiment, in order to better enable the shaft sleeve 7 to have good lubrication, an oil rope 72 is further provided, a groove 53 is provided on the inner wall of the mounting ring 52, one end of the oil rope 72 is disposed in the groove 53, and the other end of the oil rope 72 is disposed inside the crosshead case 3; conventionally, the inside of the crosshead case 3 is provided with lubricating oil 8, and the lubricating oil 8 enters the shaft sleeve 7 and the crosshead pin 6 along with the oil rope 72, so that lubrication is performed and friction is reduced; further, in order to ensure that the lubricating oil 8 in the bushing 7 can better enter the crosshead pin 6, in some embodiments, as shown in fig. 7, the side wall of the bushing 7 is provided with a second through hole 71; the lubricating head enters from the outside of the bushing 7 into the inside of the bushing 7 by means of the second through hole 71; alternatively, the end of the wick 72 may be directly inserted into the second through-hole 71.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a novel plunger pump crosshead, includes crosshead housing (3), crank (2), tappet (1) and crosshead pin (6), the one end of crank (2) is fixed through key (9) on crosshead pin (6), its characterized in that: the both sides of cross head casing (3) are equipped with the column pinhole, be equipped with axle sleeve (7) in the column pinhole, the both ends of cross head pin (6) set up respectively in axle sleeve (7), the outside of the column pinhole of cross head casing (3) both sides is equipped with gland (5), gland (5) can dismantle set up in on cross head casing (3).

2. A new plunger pump crosshead according to claim 1, characterised in that the pin bore, the gland (5) and the bushing (7) constitute a sealing structure.

3. A new plunger pump crosshead according to claim 2, characterised in that the gland (5) comprises a base plate (51) and a mounting ring (52) arranged on the base plate (51), the mounting ring (52) being arranged between the bushing (7) and the stud hole, the base plate (51) being detachably connected to the crosshead housing (3).

4. A new plunger pump crosshead according to claim 3, characterised in that the base plate (51) is provided with a first through hole (54), the axis of the mounting ring (52) is taken as the projection direction, and the projection of the first through hole (54) and the shaft sleeve (7) are overlapped.

5. A novel plunger pump crosshead according to claim 4, characterised in that the base plate (51) is provided with an avoiding through hole (55), the avoiding through hole (55) is arranged coaxially with the mounting ring (52), and the diameter of the avoiding through hole (55) is smaller than the inner diameter of the shaft sleeve (7).

6. A new plunger pump crosshead according to claim 3, characterised in that a wick (72) is also provided, a groove (53) is provided on the inner wall of the mounting ring (52), one end of the wick (72) is arranged in the groove (53), and the other end of the wick (72) is arranged inside the crosshead housing (3).

7. A new plunger pump crosshead according to claim 6, characterised in that the side wall of the bushing (7) is provided with a second through hole (71).

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