CN212672007U

CN212672007U - Three-cylinder plunger pump with high-strength plunger

Info

Publication number: CN212672007U
Application number: CN202020722817.0U
Authority: CN
Inventors: 朱顺华; 戴毅; 夏春爱; 李磊; 彭涛
Original assignee: Xinjiebao Machinery Technology Wuxi Co ltd
Current assignee: Xinjiebao Machinery Technology Wuxi Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-03-09
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses a three-cylinder plunger pump with high-strength plunger, which comprises a crankcase, wherein the front end of the crankcase is provided with a pump head, the rear end of the crankcase is provided with a rear cover, a crankshaft connecting rod driving assembly is arranged in the crankcase and is connected with three ceramic plunger shafts, the three ceramic plungers all extend into the pump head, and a reciprocating oil seal, a middle sleeve, a first water seal ring, a sealing ring and a second water seal ring are sequentially arranged on the ceramic plunger in the pump head; an oil filling hole and an oil mirror are arranged on the rear cover, an oil plug is arranged in the oil filling hole, an oil filling cover is arranged on the crankcase, and oil filter covers are arranged on the inner side wall of the crankcase corresponding to the oil filling cover and the inner side wall of the rear cover corresponding to the oil filling hole; the plunger rod comprises a ceramic plunger rod and a ceramic sleeve, wherein the surface of the plunger rod and the inner wall surface of the ceramic sleeve are both in a circular truncated cone shape, the ceramic sleeve is sleeved on the plunger rod, and one end of the plunger rod is provided with a limiting table. The utility model discloses structural strength is high, long service life, and the quality is ensured.

Description

Three-cylinder plunger pump with high-strength plunger

Technical Field

The utility model relates to a high pressure water pump field, concretely relates to three jar plunger pumps with high strength plunger.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. Plunger pumps are widely used in applications where high pressure, high flow and flow needs to be regulated, such as hydraulic machines, engineering machinery and ships.

The existing plunger pump is in the use process, the position which is most prone to quality problems is located at the position of the plunger, and due to the fact that the working environment is high-pressure, the ceramic structure on the surface of the plunger is prone to cracking in the early high-pressure working environment, the plunger pump is not beneficial to use, and the service life is shortened. And the power part of plunger pump need pour into fluid into, when participating in impurity in the fluid, greatly influences performance, mainly realizes oil control when annotating, but still has the risk among the operation process, influences the quality.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a three jar plunger pumps with high strength plunger, structural strength is high, long service life, and the quality is ensured.

In order to solve the technical problem, the utility model provides a three-cylinder plunger pump with high strength plunger, including the crankcase, the crankcase front end is provided with the pump head, the crankcase rear end is provided with the back lid, be provided with crankshaft connecting rod drive assembly in the crankcase, crankshaft connecting rod drive assembly and three ceramic plunger shaft coupling, three ceramic plunger all stretches into the interior setting of pump head, ceramic plunger in the pump head has set gradually reciprocal oil blanket, middle cover, first water seal circle, sealing washer and second water seal circle;

the oil filter cover is arranged on the inner side wall of the crankcase corresponding to the oil filling cover and on the inner side wall of the rear cover corresponding to the oil filling hole;

the ceramic plunger comprises a plunger rod and a ceramic sleeve, the surface of the plunger rod and the inner wall surface of the ceramic sleeve are both in a round table shape, the ceramic sleeve is sleeved on the plunger rod, one end of the plunger rod is provided with a limiting table, the other end of the plunger rod is provided with a limiting end cover, the axial direction of the limiting table is also provided with a power connecting part, and the power connecting part is provided with a shaft hole and is connected with a crankshaft connecting rod driving assembly; an adhesive layer is arranged between the ceramic sleeve and the plunger rod, an elastic sealing element is arranged between the limiting table and the end face of the ceramic sleeve, and the surface of the limiting end cover, which is positioned on one side of the plunger rod, is coated with glue and is provided with a sealing ring.

Furthermore, the oil filter cover comprises a clip-shaped support plate, one end of the clip-shaped support plate is welded and fixed on the corresponding crank case and the corresponding rear cover, and the other end of the clip-shaped support plate is provided with a filter screen.

Furthermore, the square support plate is also provided with a reinforcing rib at one end of the filter screen.

Furthermore, the ceramic sleeve is formed by sequentially connecting a plurality of ceramic rings.

Furthermore, the two ceramic rings are connected through an adhesive layer.

Furthermore, the plunger rod and the limiting table, namely the power connecting part, are integrally formed and made of steel.

Furthermore, a pressure regulating component and a shock-proof pressure gauge are arranged in the water outlet channel of the pump head.

The utility model has the advantages that:

1. through the setting of fluid filter mantle for fluid all has the filtering protection function when injecting into the pump body inside, guarantees the cleanliness factor of fluid, improves life.

2. The circular truncated cone-shaped structure can enable the inner wall of the ceramic sleeve to be stably attached to the plunger rod and be positioned on the same axis, and quality and sealing performance after assembly are guaranteed.

3. The plunger rod and the ceramic sleeve are matched with the axial two ends through the circular truncated cone-shaped structure surface and the limiting end covers for limiting, effective fixation is achieved, the ceramic sleeve is large in contact surface with the plunger rod, stress is uniform, and overall strength can be greatly improved.

4. The three-cylinder structure can meet the pressure supply use under the great working condition on the premise of ensuring small volume, and has wide application range.

Drawings

Fig. 1 is a schematic top view of the present invention;

fig. 2 is a schematic cross-sectional structure of the present invention;

FIG. 3 is a schematic structural view of the oil filter cover of the present invention;

fig. 4 is a schematic structural view of the ceramic plunger of the present invention;

fig. 5 is a schematic cross-sectional structure of the present invention.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1 to 5, an embodiment of the present invention of a three-cylinder plunger pump with high-strength plungers includes a crankcase 1, a pump head 2 is disposed at the front end of the crankcase, a rear cover 3 is disposed at the rear end of the crankcase, a crankshaft connecting rod driving assembly 4 is disposed in the crankcase, the crankshaft connecting rod driving assembly is coupled to three ceramic plungers 5, the three ceramic plungers all extend into the pump head, and a reciprocating oil seal 6, a middle sleeve 7, a first water seal ring 8, a seal ring 9 and a second water seal ring 10 are sequentially disposed on the ceramic plungers in the pump head; the three ceramic plungers are matched with a pump head to form a three-cylinder structure, oil in a crankcase can be blocked by a reciprocating oil seal to enter the pump head, water in the using process is blocked by a first water seal ring, a sealing ring and a second water seal ring in a matching mode to enter the crankcase, a crankshaft connecting rod driving assembly drives the ceramic plungers to do reciprocating motion, when the ceramic plungers retreat, a water suction valve in the pump head is opened and a drain valve is closed due to vacuum suction, and water is sucked into a cylinder; when the ceramic plunger piston moves forward, the water pressure in the pump head rises, so that the water suction valve is closed, the drain valve is opened, high-pressure water is discharged from the water outlet valve through the high-pressure pipe, and the three ceramic plunger pistons are matched to realize the effect of uninterrupted water outlet. Be provided with pressure regulating subassembly 29 and shock-resistant manometer 30 in the play water passageway of pump head, the current output pressure numerical value is convenient for look over in real time to the shock-resistant manometer, can adjust pressure through the pressure regulating subassembly.

An oil filling hole 11 and an oil mirror 12 are arranged on the rear cover, the oil filling hole is used for injecting oil required by the crankshaft connecting rod driving assembly during operation, the oil filling hole is sealed by an oil plug 13 after injection, and the oil mirror is used for observing the condition of the oil inside; the crankcase is provided with an oil filling cover 14, so that oil can be filled under the condition that oil is less, and the oil filling cover is provided with a ventilating sheet for keeping the internal pressure constant; in order to ensure the cleanliness of oil, oil filter covers 15 are arranged on the inner side wall of the crankcase corresponding to the oil filling cover and the inner side wall of the rear cover corresponding to the oil filling hole; during the operation, even bring into granule or impurity and pour into the crankcase in the lump into, but the fluid filter mantle can block it, guarantees that clear fluid just can contact with crankshaft connecting rod drive assembly, and the position that oil filler point and oil filler cap correspond is established to the complete cover of fluid filter mantle, though the hole is little, but fluid filter mantle design size can be enlarged to guarantee fluid injection speed, avoid operating too slowly.

Specifically, as shown in fig. 3, the oil filter cover includes a clip-shaped support plate 25, one end of the clip-shaped support plate is welded and fixed to the corresponding crank case and the rear cover, and the other end is provided with a filter screen 26, the clip-shaped support plate can effectively support an accommodating space, so as to provide a larger filtering area, and the connection with the filter screen is firm, so as to bear the pressure of oil injection. The welding end of the clip-shaped support plate can be designed to be turned over, so that the welding area is increased, and the firmness is increased. The filter screen selects the appropriate model according to the filtration demand. The reinforcing ribs 27 are further arranged at one end, located on the filter screen, of the square support plate, deformation of the filter screen is prevented in the oil injection direction, separation of the connection part of the filter screen and the square support plate can be effectively avoided, and quality is improved.

And the pottery plunger includes plunger rod 16 and ceramic cover 17, plunger rod surface and ceramic cover internal face all set up to the round platform type, the ceramic cover is established on the plunger rod, because the design of round platform type structure, the spacing contact is gone up to the axial on plunger rod surface and ceramic cover internal face, compared with the surface that current parallel cover established, it is more abundant to have, inseparable laminating effect, reduce the clearance between plunger rod and the ceramic cover, make the leakproofness of whole pottery plunger obtain guaranteeing, and have the spacing effect of axial atress, and current structure is then spacing through blockking the ceramic cover terminal surface, this application lifting surface area is big, the equipment is more stable, it is difficult cracked, consequently also can effectively guarantee the structural strength of whole pottery plunger. After the assembly, the ceramic sleeve also has self-adaptive centering capacity, the axis consistency of the plunger rod and the ceramic sleeve is effectively ensured, the assembly difficulty is reduced, and the assembly precision is improved.

One end of the plunger rod is provided with a limiting platform 18, the other end of the plunger rod is provided with a limiting end cover 19, a power connecting part 20 is further arranged in the axial direction of the limiting platform, a shaft hole 21 is formed in the power connecting part and is connected with a crankshaft connecting rod driving assembly, and the crankshaft connecting rod driving assembly provides moving power for the ceramic plunger; in order to ensure the connection strength and the waterproof performance, an adhesive layer 22 is arranged between the ceramic sleeve and the plunger rod, an elastic sealing element 23 is arranged between the limiting table and the end face of the ceramic sleeve, the elastic sealing element can be compressed after the ceramic sleeve is sleeved in the ceramic sleeve, so that the sealing effect is achieved, glue is coated on the surface of one side, located on the plunger rod, of the limiting end cover, a sealing ring 24 is installed on the surface of the limiting end cover, so that effective sealing is achieved at the two ends of the ceramic sleeve, and. The plunger rod and the limiting table are integrally formed or connected in a welding mode, namely the power connecting part, and the plunger rod and the limiting table are made of steel, so that the strength is guaranteed.

Specifically, the ceramic sheath is formed by sequentially connecting a plurality of ceramic rings 28. The two ceramic rings are connected through glue. In the use, can utilize the cushioning effect between the ceramic ring that bonds each other to offset some external force to effectual further reduction pottery is fragile.

The plunger pump has the same operation principle as the existing pump body, and can filter oil once when the oil is injected through the oil injection hole or the oil is injected by opening the oil filling cover before use, so that the problems that external particles exist in the oil in the crankcase to influence the rotation of the internal crankshaft and the reciprocating movement of the ceramic plunger cannot be caused no matter the external oil is polluted in any link; and the ceramic plunger only has the round platform type structure to overlap and establish, has effective centering effect, and the equipment precision is high to area of contact is big, and radial atress can be effectively offset by the plunger rod, thereby guarantees intensity. Thereby improving the effective service life of the plunger pump and improving the enterprise competitiveness.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A three-cylinder plunger pump with high-strength plungers is characterized by comprising a crankcase, wherein a pump head is arranged at the front end of the crankcase, a rear cover is arranged at the rear end of the crankcase, a crankshaft connecting rod driving assembly is arranged in the crankcase and is in shaft connection with three ceramic plungers, the three ceramic plungers all extend into the pump head, and a reciprocating oil seal, a middle sleeve, a first water seal ring, a sealing ring and a second water seal ring are sequentially arranged on the ceramic plungers in the pump head;

2. The triplex plunger pump with high strength plungers of claim 1 wherein said oil filter cage comprises a clip-shaped support plate welded to the corresponding crank case and rear cover at one end and having a filter screen at the other end.

3. The triplex plunger pump with high strength plungers of claim 2 wherein said clip is further provided with a reinforcing rib at one end of said filter screen.

4. The triplex plunger pump having a high strength plunger according to claim 1, wherein said ceramic sheath is formed by connecting a plurality of ceramic rings in sequence.

5. The triplex plunger pump having high strength plungers of claim 4 wherein the two ceramic rings are connected by an adhesive layer.

6. The triplex plunger pump with high strength plungers of claim 1 wherein the plunger rod and the stopper platform, i.e. the power connection, are integrally formed and made of steel.

7. The triplex plunger pump having a high strength plunger according to claim 1, wherein a pressure regulating member and a shock-proof pressure gauge are provided in the water outlet passage of said pump head.