CN213088224U

CN213088224U - Large-discharge high-pressure gear pump

Info

Publication number: CN213088224U
Application number: CN202021571408.1U
Authority: CN
Inventors: 王巧扣
Original assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Current assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-04-30
Anticipated expiration: 2030-07-31

Abstract

A large-discharge high-pressure gear pump comprises a shell, a gear shaft assembly embedded in the shell, an input shaft penetrating through the shell and connected with the gear shaft, and a high-pressure resistant structure arranged in the shell. The shell is provided with an input port through which the input shaft passes. The high-pressure-resistant structure comprises two conical bearings which are embedded in the input port and are sleeved outside the input shaft at intervals, and two high-pressure-resistant sealing rings which are embedded in the input port and are positioned on one side, far away from the gear shaft, of each conical bearing. A self-fixing structure is arranged between the conical bearing and the input shaft, and the self-fixing structure comprises an annular convex shoulder and a limiting piece, wherein the annular convex shoulder is arranged on the input shaft and is far away from the gear shaft combination, and the limiting piece is embedded at one end, far away from the annular convex shoulder, of the input shaft. This large discharge capacity high pressure gear pump improves the axial radial force and the radial stability of bearing of input shaft, reinforcing compressive property, improves life.

Description

Large-discharge high-pressure gear pump

Technical Field

The utility model belongs to the technical field of machinery, especially a big discharge capacity high pressure gear pump.

Background

Gear pumps are rotary pumps that deliver or pressurize fluid by virtue of the change in working volume and movement created between a pump cylinder and a meshing gear. Two gears, pump body and front and back covers form two closed spaces, when the gears rotate, the space on the gear disengagement side becomes larger from smaller to larger to form vacuum to suck liquid, and the space on the gear engagement side becomes smaller from larger to smaller to squeeze liquid into the pipeline. The suction chamber and the discharge chamber are separated by a meshing line of two gears. The pressure at the discharge of the gear pump is entirely dependent on the amount of resistance at the pump outlet.

The rated pressure of the traditional large-displacement gear pump is about 21Mpa, and the maximum pressure is not more than 25 Mpa. Because its input shaft axial compressive capacity of gear pump is weak, can't bear great pressure, lead to gear pump output to have great restriction.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a large discharge capacity high pressure gear pump to solve above-mentioned problem.

A large-discharge high-pressure gear pump comprises a shell, a gear shaft assembly embedded in the shell, an input shaft penetrating through the shell and connected with the gear shaft assembly, and a high-pressure resistant structure arranged in the shell. The shell is provided with an input port through which the input shaft passes. The high-pressure-resistant structure comprises two conical bearings which are embedded in the input port and are sleeved outside the input shaft at intervals, and two high-pressure-resistant sealing rings which are embedded in the input port and are positioned on one side, far away from the gear shaft, of each conical bearing. The self-fixing structure is arranged between the conical bearing and the input shaft and comprises an annular convex shoulder and a limiting piece, wherein the annular convex shoulder is arranged on the input shaft and is far away from the gear shaft combination, the limiting piece is embedded at one end, far away from the annular convex shoulder, of the input shaft, and the conical bearing is arranged between the annular convex shoulder and the limiting piece.

Further, the shell comprises a shell body, an installation chamber arranged in the shell body, and at least two oil through openings which are respectively arranged at two sides of the shell body.

Furthermore, the gear shaft combination includes that two intervals inlay the dress and be in the pivot in the installation cavity, two sets up respectively gear portion that just intermeshing is in the pivot, two overlap respectively and establish the pivot both ends and butt are in the unsteady curb plate of gear portion one side to and two overlap respectively and establish the antifriction bearing at pivot both ends.

Furthermore, the floating side plate is 8-shaped, and two spaced embedding holes are formed in the floating side plate.

Furthermore, the high-pressure-resistant sealing ring comprises a double-lip sealing ring and a single-lip sealing ring, and the double-lip sealing ring and the single-lip sealing ring are extruded between the outer wall of the annular convex shoulder and the inner wall of the input port.

Further, a gap is reserved between the outer wall of the gear part and the inner wall of the mounting cavity.

Furthermore, the conical bearings are oppositely arranged, and an isolation block is arranged between the conical bearings and the conical bearings.

Furthermore, the input shaft is further sleeved with an isolation ring which is positioned on one side of the limiting sheet far away from the conical bearing.

Furthermore, the input shaft is connected with a rotating shaft through a detachable connecting structure.

Furthermore, the detachable connecting structure comprises a screw hole arranged at one end of the rotating shaft and a thread section arranged at one end of the input shaft, and the thread section is embedded into the screw hole and is in threaded connection with the screw hole.

Compared with the prior art, the utility model provides a pair of big discharge capacity high pressure gear pump is through addding two conical bearing and high pressure resistant seal ring, further improves bearing axial radial force and the radial stability of input shaft, and the whole compressive property of reinforcing floats the curb plate simultaneously and adopts steel backing three-layer composite, improves the curb plate intensity and the wearability of floating, further improves life.

Drawings

Fig. 1 is the utility model provides a structural schematic diagram of a large-displacement high-pressure gear pump.

Fig. 2 is a schematic side view of the large displacement high pressure gear pump of fig. 1.

Fig. 3 is a schematic structural view of a floating side plate of the large discharge capacity and high pressure gear pump of fig. 1.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

Please refer to fig. 1 to fig. 3, which are schematic structural views of a large displacement high pressure gear pump according to the present invention. A large-discharge high-pressure gear pump comprises a housing 10, a gear shaft assembly 20 embedded in the housing 10, an input shaft 30 penetrating the housing 10 and connected with the gear shaft assembly 20, and a high-pressure resistant structure 40 arranged in the housing 10. The large displacement high pressure gear pump further includes other functional components and specific structures, such as an input device, an oil inlet and outlet device, and a mounting structure, which are well known in the art, and therefore, they will not be described in detail herein.

The housing 10 comprises a housing 11, a mounting chamber 12 arranged in the housing 11, and at least two oil openings 13 arranged on both sides of the housing 10. The housing 11 is made of a pressure-resistant casting material, and the mounting cavity 12 is structurally matched with the gear shaft assembly 20. In this embodiment, this big discharge capacity high pressure gear pump structure is the symmetry and sets up, and the logical oil mouth 13 of both sides is two-way logical oil, can be in order to select a logical oil mouth 13 as the oil inlet according to actual mounting structure, and another logical oil mouth 13 is the oil-out.

The housing 10 is further provided with an input port 14 for the input shaft 30 to pass through, and the input port 14 is provided with a structure which is convenient for the input shaft 30 to be embedded, thereby being beneficial to the power input of the gear shaft assembly 20.

The gear shaft assembly 20 includes two rotating shafts 21 embedded in the mounting chamber 12 at intervals, two gear portions 22 respectively disposed on the rotating shafts 21 and engaged with each other, two floating side plates 23 respectively disposed at two ends of the rotating shafts 21, and two rolling bearings 24 respectively fitted over two ends of the rotating shafts 21. It is conceivable that one of the two rotating shafts 21 connected to the input shaft 30 is a driving shaft, and the other is a driven shaft. The gear shaft assembly 20 and the housing 10 can be stably rotated relative to each other by the engagement of the rotating shaft 21 and the rolling bearing 24. The floating side plate 23 is 8-shaped, two spaced embedded holes 231 are formed in the floating side plate 23, the floating side plate 23 is matched with the mounting cavity 12, the gear portion 22 and the rotating shaft 21 are isolated, high sealing performance of the gear portion 22 is guaranteed, and the floating side plate 23 is made of a steel-backed three-layer composite material, so that the floating side plate is high in strength, wear-resistant and long in service life. A gap is reserved between the outer wall of the gear part 22 and the inner wall of the mounting cavity 12, when oil enters from one side of the oil through port 13, a meshing line of the gear part 22 is seamless, the oil flows through the gap between the outer side of the gear part 22 and the inner wall of the mounting cavity 12, and the oil passes through the oil through port 13 from the other side and is subjected to double-side extrusion and pressurization, so that the gear pump pressurization is completed.

The input shaft 30 is connected with a rotating shaft 21 through a detachable connecting structure 60. The detachable connection structure 60 includes a screw hole 61 disposed at one end of the rotation shaft 21, and a threaded section 62 disposed at one end of the input shaft 30, wherein the threaded section 62 is embedded in the screw hole 61 and is in threaded connection with the screw hole 61. The detachable connection structure 60 allows the input shaft 30 to be stably fitted into the input port 14.

The high pressure resistant structure 40 comprises two conical bearings 41 which are embedded in the input port 14 and are sleeved outside the input shaft 30 at intervals, and two high pressure resistant sealing rings 42 which are embedded in the input port 14 and are positioned on one sides of the conical bearings 41 far away from the gear shaft. The conical bearings 41 are oppositely arranged, a spacing block 411 is arranged between the conical bearings 41, two conical bearings 41 which are oppositely arranged at intervals are arranged on the outer side of the input shaft 30, the axial radial force and the radial stability of the input shaft 30 can be improved, and the spacing block 411 can enable the two conical bearings 41 to keep a proper distance. The high pressure resistant seal ring 42 includes a double lip seal ring 421 and a single lip seal ring 422, the double lip seal ring 421 and the single lip seal ring 422 are squeezed between the outer wall of the annular shoulder and the inner wall of the inlet port 14. The pressure resistance of the input shaft 30 can be further increased by the provision of the high pressure resistant seal ring 42.

A self-fixing structure 50 is arranged between the conical bearing 41 and the input shaft 30, the self-fixing structure 50 comprises an annular shoulder 51 which is arranged on the input shaft 30 and far away from the gear shaft assembly 20, and a limiting piece 52 which is embedded at one end of the input shaft 30 far away from the annular shoulder 51, and the conical bearing 41 is arranged between the annular shoulder 51 and the limiting piece 52. The stability of the two conical bearings 41 can always be maintained by the cooperation of the annular shoulder 51 and the stop piece 52.

The input shaft 30 is further sleeved with a spacing ring 31 which is positioned on one side of the limiting sheet 52 far away from the conical bearing 41. The spacer 31 is designed to prevent the input shaft 30 from being inserted too far into the input port 14, thereby improving the axial stability of the input shaft 30.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims

1. The utility model provides a big discharge capacity high pressure gear pump which characterized in that: the large-discharge high-pressure gear pump comprises a shell, a gear shaft assembly embedded in the shell, an input shaft penetrating through the shell and connected with the gear shaft assembly, and a high pressure resistant structure arranged in the shell, wherein the shell is provided with an input port through which the input shaft passes, the high pressure resistant structure comprises two conical bearings which are embedded in the input port and are sleeved outside the input shaft at intervals, and two high-pressure-resistant sealing rings which are embedded in the input port and are positioned on one side of the conical bearing away from the gear shaft, a self-fixing structure is arranged between the conical bearing and the input shaft, the self-fixing structure comprises an annular convex shoulder which is arranged on the input shaft and is far away from the gear shaft combination, and the conical bearing is arranged between the annular convex shoulder and the limiting piece.

2. The large capacity, high pressure gear pump of claim 1, wherein: the shell comprises a shell body, an installation cavity arranged in the shell body, and at least two oil through openings which are respectively arranged at two sides of the shell body.

3. The large capacity, high pressure gear pump of claim 2, wherein: the gear shaft combination comprises two rotating shafts embedded in the mounting cavity at intervals, two gear parts which are arranged on the rotating shafts and meshed with each other, two floating side plates which are respectively sleeved at two ends of the rotating shafts and abutted against one side of the gear parts, and two rolling bearings which are respectively sleeved at two ends of the rotating shafts.

4. The large capacity high pressure gear pump of claim 3, wherein: the floating side plate is 8-shaped, and two spaced embedding holes are formed in the floating side plate.

5. The large capacity, high pressure gear pump of claim 1, wherein: the high-pressure-resistant sealing ring comprises a double-lip sealing ring and a single-lip sealing ring, and the double-lip sealing ring and the single-lip sealing ring are extruded between the outer wall of the annular convex shoulder and the inner wall of the input port.

6. The large capacity high pressure gear pump of claim 3, wherein: a gap is reserved between the outer wall of the gear part and the inner wall of the mounting cavity.

7. The large capacity, high pressure gear pump of claim 1, wherein: the conical bearings are oppositely arranged, and an isolation block is arranged between the conical bearings and the conical bearings.

8. The large capacity, high pressure gear pump of claim 1, wherein: the input shaft is further sleeved with an isolation ring which is positioned on one side of the limiting sheet far away from the conical bearing.

9. The large capacity, high pressure gear pump of claim 1, wherein: the input shaft is connected with one rotating shaft through a detachable connecting structure.

10. The large capacity, high pressure gear pump of claim 9, wherein: the detachable connecting structure comprises a screw hole arranged at one end of the rotating shaft and a thread section arranged at one end of the input shaft, and the thread section is embedded into the screw hole and is in threaded connection with the screw hole.