CN116447097A

CN116447097A - Plunger assembly of high water base plunger pump

Info

Publication number: CN116447097A
Application number: CN202310272321.6A
Authority: CN
Inventors: 张晞; 鲁城凯; 高守军
Original assignee: China University of Mining and Technology Beijing CUMTB
Current assignee: China University of Mining and Technology Beijing CUMTB
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-07-18

Abstract

A plunger assembly for a high water-based plunger pump. The plunger assembly of the invention, the plunger cylinder of which mainly comprises the following components: the device comprises a linear rolling bearing, a sealing ring and a guide ring. The linear rolling bearing is internally provided with a plurality of rows of balls, the balls are in direct contact with the outer wall of the plunger rod, the whole friction mode is rolling friction, and the plunger rod and the plunger cylinder can be ensured to be in a coaxial position; the sealing ring is made of high polymer materials, so that the liquid leakage amount can be reduced; the guide ring is made of high polymer materials, is used for stabilizing the gesture of the plunger rod and plays a role in guiding. The plunger assembly can effectively overcome the abrasion problem caused by low water viscosity, and has the advantages of good sealing performance, long service life and the like.

Description

Plunger assembly of high water base plunger pump

Technical Field

The utility model discloses high water base plunger pump's plunger subassembly especially relates to the inside structural design of plunger jar.

Background

The plunger pump is an important device commonly found in hydraulic engineering equipment, and a plunger assembly is used as a main working part of the plunger pump, and changes the volume of an inner space of a plunger cylinder through the movement of a plunger rod in the plunger cylinder, so that the liquid suction and drainage process is realized. The high water-based transmission fluid is hydraulic transmission fluid with the water content reaching 80% or above, the hydraulic element and the system adopt the high water-based transmission fluid as a medium, and compared with the oil-based transmission fluid, the high water-based transmission fluid has lower cost, is more environment-friendly, has higher applicability in the field of ocean exploration and exploitation, and has certain safety. However, because the viscosity of water is low, an oil film cannot be formed like oil liquid to play a role in protecting and lubricating, and when the plunger assembly works, the problems of abrasion, blocking and the like are easily caused, and the degree of compactness of the plunger rod matched with the plunger cylinder during the working is also a key factor for measuring the working smoothness of the plunger assembly. The physical and chemical properties of the aqueous medium bring difficulties to the development of high water-based plunger pumps, so that the developed plunger assembly needs to solve common technical problems of lubrication, sealing, corrosion, abrasion and the like.

Disclosure of Invention

The invention aims to solve the problems of corrosion and abrasion caused by low water viscosity, and provides a plunger assembly with good sealing performance and high operation efficiency in a high water-based working environment. The plunger assembly has the following important components in the plunger cylinder: the device comprises a linear rolling bearing, a sealing ring and a guide ring.

And a plurality of rows of balls are arranged in the linear rolling bearing, and the balls are in direct contact with the outer wall of the plunger rod. Because the viscosity of water is low, an oil film cannot be formed like oil liquid, so that the lubricating effect is protected. In high water-based media, if the plunger rod directly reciprocates in the plunger cylinder, the plunger rod and the plunger cylinder cannot be guaranteed to coaxially work, meanwhile, if the assembly clearance between the plunger rod and the plunger cylinder is too large, the possibility of liquid leakage is increased, and if the assembly clearance is too small, the smoothness of work is affected, and serious abrasion is caused. The adoption of the linear rolling bearing can solve the problems: when the plunger rod moves in the plunger cylinder, the outer wall of the plunger rod drives the balls to roll, the whole friction form is changed into rolling friction with smaller friction coefficient, and meanwhile, the coaxial work of the plunger rod and the plunger cylinder is ensured, and the running fluency is improved. A gap is formed between the balls, and liquid can be pressed into the liquid discharge valve through the gap when the internal volume of the plunger cylinder changes.

The sealing ring is made of high polymer materials, so that the degree of water corrosion can be effectively reduced, the tightness of the inner space of the plunger cylinder is ensured, and the problem of liquid leakage in the plunger cylinder is solved.

The guide ring is made of high polymer materials, and the plunger rod penetrates through the guide ring. The guide ring is used for keeping the gesture balance of the plunger rod, further ensuring that the plunger rod and the plunger cylinder are in coaxial positions, and improving the smoothness of the reciprocating motion of the plunger rod.

The plunger assembly of the inventive high water-based plunger pump mentioned herein is applicable to plunger pumps in radial or axial form.

A high water-based radial plunger pump is mentioned herein, including the present invention.

From the above description, the plunger assembly of the high water-based plunger pump has the following beneficial effects: the linear rolling bearing solves the problem of abrasion caused by the fact that a film cannot be formed due to low viscosity of water, and prolongs the service life of equipment; the sealing ring structure is adopted, so that the leakage problem of the medium is effectively reduced, and the closed working space inside the plunger cylinder is ensured; the structure of the guide ring improves the fluency of the operation of the plunger assembly and improves the operation efficiency of the equipment.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic diagram of the operation of the plunger assembly

FIG. 2 shows a two-dimensional plan view of the Gao Shuiji radial plunger pump described in example 1

FIG. 3 shows a cross-sectional view of the plunger assembly of example 1

FIG. 4 shows a two-dimensional plan view of a Gao Shuiji radial plunger pump described in example 2

FIG. 5 shows a cross-sectional view of the plunger assembly of example 2

Reference numerals

1: disc cam 8: linear rolling bearing

2: rolling ball 9: ball bearing

3: spring 10: liquid discharge valve

4: plunger rod 11: liquid suction valve

5: guide ring 12: the plunger assembly of the present invention

6: sealing ring 13: eccentric bearing

7: plunger cylinder 14: main shaft

Detailed Description

In one embodiment, a high water-based radial plunger pump employs the plunger assembly (12) configuration described above. As shown in fig. 2, the main shaft (14) is provided with a disc cam (1), the end surface of the plunger rod (4) is provided with a rolling ball head (2), and the rolling ball head (2) is contacted with the disc cam (1). As shown in fig. 3, the linear rolling bearing (8) is fixedly mounted at one end, away from the rolling ball head (2) of the plunger rod (4), inside the plunger cylinder (7), the outer wall of the linear rolling bearing (8) is in contact with the inner wall of the plunger cylinder (7), the sealing ring (6) is fixedly mounted at the middle section inside the plunger cylinder (7), and the guide ring (5) is fixedly mounted at the inner port of the plunger cylinder (7). The guide ring (5) and the sealing ring (6) are made of high polymer materials, such as polyurethane or rubber. The plunger cylinder (7), the plunger rod (4), the linear rolling bearing (8), the sealing ring (6) and the guide ring (5) are all in coaxial positions.

In one embodiment, a high water-based radial plunger pump employs the plunger assembly (12) configuration described above, with the main shaft (14) mounting the eccentric bearing (13) in contact with the plunger rod (4) end face of the plunger assembly (12), as shown in FIG. 4. As shown in fig. 5, the mounting positions of the linear rolling bearing (8), the sealing ring (6) and the guide ring (5) are identical as in embodiment 1. The guide ring (5) and the sealing ring (6) are made of high polymer materials, such as polyurethane or rubber. The plunger cylinder (7), the plunger rod (4), the linear rolling bearing (8), the sealing ring (6) and the guide ring (5) are all in coaxial positions.

Claims

1. A plunger assembly (12) for a high water-based plunger pump, the main structure comprising: plunger rod (4), plunger cylinder (7), spring (3), liquid suction valve (11), flowing back valve (10), its characterized in that, plunger cylinder inside still includes a straight line guide structure to and a sealed integrated configuration.

2. Plunger assembly (12) according to claim 1, characterized in that the linear guide structure is a linear rolling bearing (8).

3. Plunger assembly (12) according to claim 2, characterized in that the linear rolling bearing (8) is fixedly mounted between the plunger rod (4) and the plunger cylinder (7) in a coaxial position with the plunger rod (4) and the plunger cylinder (7).

4. A plunger assembly (12) as claimed in claim 3, wherein the inner balls (9) of the linear rolling bearing (8) are in direct contact with the outer wall of the plunger rod (4).

5. Plunger assembly (12) according to claim 1, characterized in that the sealing combination is a guide ring (5), a sealing ring (6).

6. The plunger assembly (12) as claimed in claim 5, wherein the guide ring (5), the sealing ring (6) are mounted between the plunger rod (4) and the plunger cylinder (7) and are both in a coaxial position with the plunger rod (4) and the plunger cylinder (7).

7. Plunger assembly (12) of a high water-based plunger pump according to claims 1-6, adapted for use in a plunger pump of radial or axial form.

8. A radial plunger pump for high water base, characterized in that it comprises a plunger assembly (12) structure according to any one of the preceding claims.