CN220267923U - Plunger coupling structure and reciprocating plunger pump - Google Patents

Abstract

The utility model provides a plunger coupling structure for connect plunger and power end part, including connecting piece, shutoff compress tightly piece and belleville spring subassembly, the connecting piece includes the first end that is used for connecting the plunger and is used for connecting the second end of power end part, and first end includes the cavity, and the tip of plunger cooperates with the cavity; the plugging compressing piece is used for compressing at the first end so as to fix the plunger and the connecting piece; the belleville spring assembly is arranged between the blocking pressing piece and the end face of the first end and is used for relieving impact force by means of self elasticity and compensating the hysteresis angle of the pump valve. A reciprocating plunger pump is also provided.

Description

Plunger coupling structure and reciprocating plunger pump

Technical Field

The utility model relates to the field of pump structures, in particular to the field of plunger coupling structures.

Background

The plunger connecting piece is a connecting piece positioned between the plunger and the power end cross head and between the plunger and the middle rod of the pump, and the action is very important. The pump converts rotary motion into reciprocating motion and transmits the reciprocating motion to the plunger through structures such as a connecting rod, a cross head, a plunger connecting piece and the like. For a large-scale reciprocating pump structure, a connecting structure between a plunger and a pump often belongs to direct hard connection, the impact force of the plunger on a power end part is large, and the part failure is easy to cause.

In addition, the pump valve of the plunger reciprocating pump often has a hysteresis condition, which causes accumulation of materials. In view of this, there is a need to propose a plunger coupling structure to solve the above-mentioned problems.

Disclosure of Invention

It is an object of the present utility model to provide a plunger coupling structure to cushion the impact force of a plunger while compensating for the hysteresis angle of a pump valve.

The plunger connecting structure for achieving the purpose is used for connecting a plunger with a power end of a pump and comprises a connecting piece, a blocking pressing piece, a belleville spring assembly and a rolling bearing, wherein the connecting piece comprises a first end used for connecting the plunger and a second end used for connecting the power end, the first end comprises a concave cavity, and the end part of the plunger is matched with the concave cavity; the plugging pressing piece is used for pressing the first end; the belleville spring assembly is arranged between the blocking pressing piece and the end face of the first end, and the rolling bearing is arranged between the belleville spring assembly and the blocking pressing piece.

In one or more embodiments, portions of the belleville springs are oppositely facing and portions of the belleville springs are oppositely facing.

In one or more embodiments, the belleville spring assembly includes three belleville springs, two of which are disposed opposite one another and one of which is disposed opposite one another.

In one or more embodiments, the rolling bearing is a planar needle bearing or a planar ball bearing or a planar roller bearing.

In one or more embodiments, the plunger coupling structure further comprises a spacer disposed within the cavity with both ends respectively abutting the coupling member and the plunger.

In one or more embodiments, the plunger coupling structure further comprises a half collet clamped around the plunger periphery.

In one or more embodiments, the plugging compression member is fixedly connected to the first end by a threaded structure.

In one or more embodiments, the plunger coupling structure further comprises a dust collar that is sleeved on the peripheral surface of the plunger outside the plugging compression member to prevent impurities from entering the plunger coupling structure.

In one or more embodiments, the plunger coupling structure further comprises a locking sleeve.

Another object of the present utility model is to provide a reciprocating plunger pump comprising a power end and a fluid end, wherein the fluid end adopts the plunger coupling structure described above.

According to the plunger coupling structure, the disc spring assembly and the rolling bearing are arranged between the plugging compressing piece and the coupling piece, impact force of the plunger to the coupling piece is effectively relieved by utilizing the resilience force of the disc spring assembly and the high bearing performance of the rolling bearing, meanwhile, the hysteresis angle of the pump valve can be compensated by virtue of the resilience force, the conveying medium can be conveyed in time, and accumulation of the medium is reduced.

Drawings

The above and other features, properties and advantages of the present utility model will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

fig. 1 is a schematic view of the connection structure of the plunger and the power end.

FIG. 2 is a schematic view of one embodiment of a plunger coupling arrangement.

Sign mark description

4. Plugging compacting piece

5. Power end

6. Crankshaft

7. Connecting rod

8. Crosshead

9. Coupling piece

10. Plunger piston

11. Belleville spring

12. Rolling bearing

13. Partition piece

14. Half chuck

15. Dust-proof ring

16. Anti-loose sleeve

17. Baffle plate

91. First end

92. Second end

93. Concave cavity

101. First connecting piece

103. Third connecting piece

110. Belleville spring assembly

Detailed Description

The present utility model will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present utility model, but it will be apparent that the present utility model can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present utility model, and therefore should not be construed to limit the scope of the present utility model in terms of the content of this specific embodiment.

It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the utility model as it is actually claimed.

The connection structure between the power end 5 and the hydraulic end of the reciprocating pump is shown with reference to fig. 1, the power end 5 includes a crankshaft 6, a connecting rod 7, a cross head 8, and the like, and the crankshaft 6 is used for receiving power of a motor and is connected with one end of the connecting rod 7. The connecting rod 7 is a member that converts the rotational motion of the crankshaft 6 into the reciprocating motion of the plunger 10 in the a direction, and the other end of the connecting rod 7 is connected to the cross head 8, which serves as a connecting member, plays a guiding role, and transmits the acting force. The hydraulic end comprises a plunger, a pump body, a valve body and the like. The coupling 9 is a connection structure connecting the plunger 10 and the power end 5.

Referring to fig. 2, the plunger coupling structure of the present disclosure includes a coupling member 9, a blocking hold-down member 4, a belleville spring assembly 110, and a rolling bearing 12.

The coupling 9 comprises a first end 91 for connecting the plunger 10 and a second end 92 for connecting the power end parts, the first end 91 comprising a cavity 93, the end of the plunger 10 cooperating with the cavity 93. The second end 92 is connected to the power end 5, such as by a threaded connection or the like. The power end 5 may be a middle rod, a power end cross head, or other components. Those skilled in the art will appreciate that the power end member associated with the second end 92 will be determined based on the particular configuration of the power end.

The blocking presser 4 is used to press the first end 91, thereby fixing the plunger 10 and the coupling member 9. The plugging compression member 4 is fixedly connected to the first end 91 by, for example, a screw structure, and is fixed to the first end 91 by the first connecting member 101 shown in fig. 2, and is also fixed to the shutter 17 by the third connecting member 103, thereby achieving a compression fixation. The first connector 101 may also be used with the locking sleeve 16.

The belleville spring assembly 110 is disposed between the blocking hold-down member 4 and the end face of the first end 91, and the blocking hold-down member 4 compresses the belleville spring assembly 110 therebetween, so that the belleville spring assembly 110 deforms, relieves the impact force by virtue of its own elasticity, and compensates for the hysteresis angle of the pump valve. Referring to fig. 2, the belleville spring can effectively relieve impact generated by plunger force by virtue of self resilience force, lighten impact of the plunger force on a power end part, protect safety of each part, and can compensate hysteresis angle of a one-way valve at an inlet and an outlet of a pump to avoid medium accumulation.

Preferably, in some embodiments, portions of the belleville springs 11 are oppositely facing and portions of the belleville springs are oppositely facing. As shown in fig. 2, the disc spring assembly 110 includes three disc springs 11, two of which are disposed facing opposite, the other facing the blocking presser side, and disposed opposite to one of the facing opposite two disc springs.

The plunger coupling arrangement further comprises a rolling bearing 12 arranged between the belleville spring assembly 110 and the plugging compression element 4. In some embodiments, the rolling bearing may be a planar needle bearing or a planar ball bearing or a planar roller bearing. By setting the high bearing characteristic of the plane rolling bearing, the impact force of the plunger 10 on the connecting piece can be further reduced by utilizing the rolling fit of the bearing and the first end face of the connecting piece 9, so that the bearing in the larger unidirectional axial direction is realized, the impact of the plunger force on the limit position of the crank connecting rod mechanism is effectively relieved by combining the disc spring, and the hysteresis angle of the pump inlet and outlet one-way valve is compensated.

With continued reference to fig. 2, the plunger coupling arrangement further comprises a spacer member 13 disposed within the cavity 93 at opposite ends thereof against the coupling member 9 and the plunger 10, respectively. In some embodiments, the spacer 13 includes a spacer block 131 and a spacer 132, the spacer 132 being in direct contact with the plunger 10.

As shown in fig. 2, in some embodiments, the plunger coupling structure further includes a huff chuck 14 clamped to the outer periphery of the plunger 10.

In some embodiments, the plunger coupling structure further comprises a dust-proof ring 15 sleeved on the peripheral surface of the plunger 10 outside the blocking compression member 4, and the portion of the plunger 10 outside the blocking compression member 4 extends into the coupling member 9 through the baffle 17 and the blocking compression member 4. The dust ring 15 passes through the plunger 10 between the blocking hold-down 4 and the baffle 17 to prevent impurities from entering the baffle 17 and thus the plunger connection.

During installation, the rolling bearing 12 is installed in the plugging compressing piece 4, and the half chuck 14 is used for holding the neck of the plunger 10; then sequentially arranging disc springs 11, wherein the disc springs 11 are respectively arranged back to back and face to face; the spacers 13 are then sequentially inserted into the cavities 93 of the coupling element 9. After the positions of the blocking pressing piece 4, the plunger 10, the connecting piece 9 and the belleville spring assembly 110 are determined, the first connecting piece 101 is installed, the blocking pressing piece 4 is fixed on the connecting piece 9, and the partition piece 13, the belleville spring assembly 110 and the plunger 10 are pressed in sequence; finally, a baffle 17 and a dust-proof ring 15 are installed, and the dust-proof ring 15 prevents external impurities from entering the plunger connecting structure.

Therefore, the plunger coupling structure can compress the belleville spring assembly 110 and cooperate with the rolling bearing 12 to buffer the impact force of the plunger and compensate the hysteresis angle of the pump valve when the plunger is subjected to the maximum working pressure in the movement process of the plunger 10.

In combination with the above description of the plunger coupling structure, it can be further understood that a reciprocating plunger pump includes a hydraulic end and a power end, where the hydraulic end adopts the plunger coupling structure, and the reciprocating plunger pump has a better medium conveying effect.

It should be noted that, in the foregoing description, the terms "first", "second", etc. are used to define the components, and are merely for convenience in distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and do not represent primary or secondary, so they should not be construed as limiting the scope of protection of the present application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the utility model, as will occur to those skilled in the art, without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model fall within the protection scope defined by the claims of the present utility model.

Claims (10)

1. A plunger coupling arrangement for connecting a plunger (10) with a power end (5) of a pump, comprising:

-a coupling (9) comprising a first end (91) and a second end (92), said first end (91) comprising a cavity (93), said cavity (93) being intended to cooperate with said plunger (10), said second end (92) being intended to connect said power end (5);

a blocking hold-down (4) for holding down the first end (91);

a belleville spring assembly (110) disposed between the blocking hold-down member (4) and the first end (91); and

and a rolling bearing (12) arranged between the belleville spring assembly (110) and the blocking pressing piece (4).

2. A plunger coupling arrangement as claimed in claim 1, characterised in that part of the belleville springs (11) are arranged facing opposite and part of the belleville springs are arranged facing opposite.

3. The plunger coupling arrangement as set forth in claim 2, wherein the belleville spring assembly (110) comprises three belleville springs (11), two of which are disposed facing opposite each other and the other facing the blocking presser side and being disposed opposite one of the two belleville springs facing opposite each other.

4. Plunger coupling arrangement according to claim 1, characterized in that the rolling bearing (12) is a planar needle bearing or a planar ball bearing or a planar roller bearing.

5. Plunger coupling arrangement according to claim 1, characterized in that it further comprises a spacer (13) arranged in said cavity (93), both ends of which are respectively in abutment with said coupling element (9) and said plunger (10).

6. The plunger coupling arrangement of claim 1, further comprising a haff clamp (14) clamped to the outer periphery of the plunger (10).

7. The plunger coupling arrangement of claim 1, wherein the plugging compression element (4) is fixedly connected to the first end (91) by a threaded arrangement.

8. The plunger coupling arrangement as claimed in claim 1, further comprising a dust ring (15) which is fitted over the peripheral surface of the plunger (10) outside the plugging compression element (4).

9. The plunger coupling arrangement of claim 1, further comprising a locking sleeve (16).

10. A reciprocating plunger pump comprising a power end and a fluid end, wherein the fluid end employs a plunger coupling arrangement as claimed in any one of claims 1 to 9.