阅读说明：本技术 一种高压柱塞泵液缸自增强工装 (High pressure plunger pump hydraulic cylinder is from reinforcing frock ) 是由 郭志军 于 2020-08-17 设计创作，主要内容包括：本发明提供了一种高压柱塞泵液缸自增强工装,包括多级增压动力站、操作监视台单元、高压管道、十字相贯孔单元工装、测试辅助工作台；液缸内输入高压介质,所述高压介质通过多级增压动力站作为动力单元输送,所述多级增压动力站通过两组高压管道输送高压介质,一组高压管道一端连接缸的外腔,另一端连通十字相贯孔单元工装一端口；另一组高压管道一端连接缸的内腔,另一端连通十字相贯孔单元工装另一端口；所述操作监视台单元,用于实时采集两组高压介质通路过程中的压力值和渗漏点；所述十字相贯孔单元工装固定安装在测试辅助工作台内部。该工装能有效地抵消作业时交变应力的影响,从而有效提升产品的疲劳寿命。(The invention provides a high-pressure plunger pump hydraulic cylinder self-reinforcing tool, which comprises a multi-stage boosting power station, an operation monitoring platform unit, a high-pressure pipeline, a cross through hole unit tool and a test auxiliary workbench, wherein the operation monitoring platform unit is connected with the high-pressure pipeline through the cross through hole unit tool; high-pressure media are input into the hydraulic cylinder, the high-pressure media are conveyed as a power unit through a multistage supercharging power station, the multistage supercharging power station conveys the high-pressure media through two groups of high-pressure pipelines, one end of one group of high-pressure pipelines is connected with an outer cavity of the hydraulic cylinder, and the other end of one group of high-pressure pipelines is communicated with one port of a cross-shaped through hole unit tool; one end of the other group of high-pressure pipelines is connected with the inner cavity of the cylinder, and the other end of the other group of high-pressure pipelines is communicated with the other port of the cross-shaped through hole unit tool; the operation monitoring platform unit is used for acquiring pressure values and leakage points in the process of two groups of high-pressure medium passages in real time; the cross-shaped through hole unit tool is fixedly installed inside the test auxiliary workbench. The tool can effectively offset the influence of alternating stress during operation, thereby effectively prolonging the fatigue life of the product.)

1. The utility model provides a high pressure plunger pump hydraulic cylinder is from reinforcing frock which characterized in that: the device comprises a multi-stage supercharging power station (1), an operation monitoring platform unit (2), a high-pressure pipeline (3), a cross-shaped through hole unit tool (9) and a test auxiliary workbench (4);

high-pressure media are input into the hydraulic cylinder, the high-pressure media are conveyed as power units through a multistage supercharging power station (1), the multistage supercharging power station (1) conveys the high-pressure media through two groups of high-pressure pipelines (3), one end of one group of high-pressure pipelines (3) is connected with an outer cavity of the hydraulic cylinder, and the other end of the one group of high-pressure pipelines is communicated with one port of a cross-shaped through hole unit tool (9); one end of the other group of high-pressure pipelines (3) is connected with the inner cavity of the cylinder, and the other end is communicated with the other port of the cross-shaped through hole unit tool (9); the operation monitoring platform unit (2) is used for acquiring pressure values and leakage points in the process of two groups of high-pressure medium passages in real time; the cross-shaped through hole unit tool (9) is fixedly installed inside the test auxiliary workbench (4).

2. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: the multistage supercharging power station (1) is set in a multistage supercharging mode of a low-pressure pump, a medium-pressure pump and a high-pressure pump and is used for independently and correspondingly emptying a cavity high-pressure medium in the processes of emptying, low-pressure loading, medium-pressure loading and high-pressure loading.

3. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: the operation monitoring platform unit (2) comprises a protective pull rod (6), an upper pressing cap (7), an upper pressing cover (8) and a lower bottom cover (10); the protection pull rods (6) are arranged in two groups at intervals in parallel, the upper ends of the protection pull rods are fixedly connected with the top end of the cross through hole unit tool in the vertical direction from top to bottom through upper pressing caps (7) and upper pressing covers (8), and the lower ends of the protection pull rods are fixedly connected with the bottom end of the cross through hole unit tool (9) in the vertical direction from top to bottom through lower bottom covers (10) and the other group of upper pressing caps (7).

4. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: still include detection cloud platform unit (5), high pressure protection room (12), wherein high pressure protection room (12) are used for placing test auxiliary workbench (4) and cross through hole unit frock (9) mutually, platform unit (2) fixed mounting is monitored in the operation outside high pressure protection room (12), detection cloud platform unit (5) set up to multiunit camera device, independently fixed mounting is in the different positions of high pressure protection room (12) medial surface.

5. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: the test auxiliary workbench (4) comprises a pressure sensor, a data acquisition unit and an auxiliary monitoring unit, wherein the pressure sensor is fixedly arranged at different positions in the process of high-pressure medium access and is transmitted to the input end of the data acquisition unit by acquiring a pressure value; the output end of the data acquisition unit transmits the pressure value to the auxiliary monitoring unit; and the auxiliary monitoring unit is used for analyzing and comparing the data and then outputting a working signal.

6. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: the cross-shaped through hole unit tool (9) is sealed by adopting three sealing mode structures, namely a sealing structure, a U-shaped sealing lip sealing structure and a conical surface sealing structure.

7. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 4, characterized in that: the high-pressure protection room (12) adopts an alloy steel frame structure, the outer side of the frame structure is a steel plate sealing plate with the thickness of 10 mm-50 mm, and the inner side of the frame structure is a wood plate with the thickness of 100 mm-200 mm.

8. The high-pressure plunger pump hydraulic cylinder self-reinforcing tool according to claim 1, characterized in that: the cross-shaped through hole unit tool (9) is arranged in a tool structure with a horizontal shaft (13) and a vertical shaft crossed at 90 degrees, and comprises a U-shaped sealing lip (14), a sealing support back ring (15), a nut (16), a suction hole plug (17), a drainage hole plug (19), a conical surface seal (18) and a valve spring (20); the bottom of one end of the horizontal shaft (13) is provided with a U-shaped sealing lip (14), and the outer side of the U-shaped sealing lip (14) is sequentially provided with a sealing support back ring (15) and a nut (16); two ends of the vertical shaft are respectively provided with a suction hole plug (51) and a drainage hole plug (41), wherein the suction hole plug (17) is sequentially sealed by a conical surface sealing structure (18), an O-shaped ring sealing structure and a nut (16) from inside to outside; a workpiece (11) is installed on one side of the drainage hole plug (19), a valve spring (20) is arranged at the top end of the workpiece (11), and the part, extending out of the vertical shaft, of the workpiece (11) is installed in a sealing mode through a nut (16); the drainage hole plug (19) is fixedly arranged with a drainage pressure cap at the outer side.

9. The high-pressure plunger pump cylinder self-reinforcing tool according to claim 8, characterized in that: a group of U-shaped sealing lips (14) are arranged at the gap position between the workpiece (11) and the nut (16); the valve spring (20) is used for a low-pressure evacuation process; and a leakage port is formed in the drainage pressure cap and used for leaking redundant media after the hydraulic cylinder cavity is filled with the media.

Technical Field

The invention belongs to the technical field of hydraulic cylinder preparation, and particularly relates to a self-reinforcing tool for a hydraulic cylinder of a high-pressure plunger pump.

Background

The existing hydraulic cylinder is directly processed after integral forging heat treatment, and the cross-shaped through hole in the hydraulic cylinder cannot be rapidly processed by using mechanical equipment at present and still adopts a manual fillet mode. The manual fillet has uneven polishing, easily generates uneven residual stress and is not easy to eliminate; meanwhile, when the hydraulic cylinder works, the hydraulic cylinder bears alternating stress as high as 15000PSI (103.5Mpa), fatigue cracks are easy to generate, and meanwhile, the residual stress generated by polishing can be rapidly expanded, so that the hydraulic cylinder fails prematurely, and the service life is greatly reduced.

Disclosure of Invention

Aiming at the technical problems that the fatigue failure of the through hole of the hydraulic cylinder is a main factor influencing the service life of the hydraulic cylinder, and the processing residual stress and the alternating stress during operation are causes the fatigue failure of the hydraulic cylinder, the invention uses a high-pressure medium which is 2-5 times higher than the working pressure to act on the area at the position where the hydraulic cylinder is easy to generate the residual stress and is influenced by the alternating stress to generate plastic deformation in the area, and the pressure of the plastic deformation is far higher than the residual stress, thereby eliminating the influence of the processing residual stress, being much higher than the plastic deformation generated by the operation pressure, effectively offsetting the influence of the alternating stress during the operation, thereby effectively prolonging the fatigue life of the product, and further providing a high-pressure plunger pump hydraulic cylinder self-reinforcing tool which comprises a multistage pressurization power station, an operation monitoring platform unit, a high-pressure pipeline, a cross through hole unit tool and a test auxiliary workbench;

high-pressure media are input into the hydraulic cylinder, the high-pressure media are conveyed as a power unit through a multistage supercharging power station, the multistage supercharging power station conveys the high-pressure media through two groups of high-pressure pipelines, one end of one group of high-pressure pipelines is connected with an outer cavity of the hydraulic cylinder, and the other end of one group of high-pressure pipelines is communicated with one port of a cross-shaped through hole unit tool; one end of the other group of high-pressure pipelines is connected with the inner cavity of the cylinder, and the other end of the other group of high-pressure pipelines is communicated with the other port of the cross-shaped through hole unit tool; the operation monitoring platform unit is used for acquiring pressure values and leakage points in the process of two groups of high-pressure medium passages in real time; the cross-shaped through hole unit tool is fixedly installed inside the test auxiliary workbench.

As an improvement, the multistage supercharging power station is set to be in a multistage supercharging mode of a low-pressure pump, a medium-pressure pump and a high-pressure pump and is used for independently corresponding to the evacuation and low-pressure loading process, the medium-pressure loading process and the evacuation treatment of a cavity high-pressure medium in the high-pressure loading process.

As an improvement, the operation monitoring platform unit comprises a protective pull rod, an upper pressing cap, an upper pressing cover and a lower bottom cover; the protection pull rods are arranged in parallel at intervals, the upper ends of the protection pull rods are fixedly connected with the top end of the cross-shaped intersecting hole unit tool in the vertical direction from top to bottom through upper pressing caps and upper pressing covers, and the lower ends of the protection pull rods are fixedly connected with the bottom end of the cross-shaped intersecting hole unit tool in the vertical direction from top to bottom through lower bottom covers and another group of upper pressing caps.

As the improvement, still include detection cloud platform unit, high-pressure protection room, wherein high-pressure protection room is used for placing test auxiliary workbench and cross through hole unit frock mutually, platform unit fixed mounting is monitored in the operation outside at high-pressure protection room, detection cloud platform unit sets up to multiunit camera device, independently fixed mounting is in the different positions of high-pressure protection room medial surface.

As an improvement, the test auxiliary workbench comprises a pressure sensor, a data acquisition unit and an auxiliary monitoring unit, wherein the pressure sensor is fixedly arranged at different positions in the process of passing through a high-pressure medium passage and is used for transmitting a pressure value to the input end of the data acquisition unit; the output end of the data acquisition unit transmits the pressure value to the auxiliary monitoring unit; and the auxiliary monitoring unit is used for analyzing and comparing the data and then outputting a working signal.

As an improvement, the cross through hole unit tool is sealed by adopting three sealing mode structures, namely a sealing structure, a U-shaped sealing lip sealing structure and a conical surface sealing structure.

As an improvement, the high-pressure protection room adopts an alloy steel frame structure, the outer side of the frame structure is a steel plate sealing plate with the thickness of 10 mm-50 mm, and the inner side of the frame structure is a wood plate with the thickness of 100 mm-200 mm.

As an improvement, the crossed through hole unit tool is a tool structure with a horizontal shaft and a vertical shaft crossed at 90 degrees, and comprises a U-shaped sealing lip, a sealing support back ring, a nut, a suction hole plug, a drainage hole plug, a conical surface seal and a valve spring; the bottom of one end of the horizontal shaft is provided with a U-shaped sealing lip, and a sealing support back ring and a nut are sequentially arranged on the outer side of the U-shaped sealing lip; two ends of the vertical shaft are respectively provided with a suction hole plug and a drainage hole plug, wherein the suction hole plug is sequentially sealed by a conical surface sealing structure, an O-shaped ring sealing structure and a nut from inside to outside; a workpiece is arranged on one side of the drainage hole plug, a valve spring is arranged at the top end of the workpiece, and the part of the workpiece extending out of the vertical shaft is hermetically arranged through a nut; the drainage hole plug is fixedly installed with a drainage pressure cap on the outer side.

As an improvement, a group of U-shaped sealing lips are arranged at the position of a gap between the workpiece and the nut; the valve spring is used for a low-pressure emptying process; and a leakage port is formed in the drainage pressure cap and used for leaking redundant media after the hydraulic cylinder cavity is filled with the media.

Has the advantages that: the invention provides a method for self-reinforcing a tool for a hydraulic cylinder of a high-pressure plunger pump, which is a method capable of eliminating residual stress and balancing alternating stress, and compared with the conventional technology, the tool has the advantages that: (1) the input pressure can be stably increased by adopting a multi-stage pressurization mode, so that 200 and 800MPA high-pressure media can be stably output; (2) the ultrahigh pressure pipeline is arranged, and a mode of jointly using a high pressure hard pipe and a high pressure hose is adopted, so that the connection is convenient and the use is safe; (3) two paths of output high-pressure pipelines respectively control the pressurization of the inner cavity and the outer cavity, and ensure that the cavities are simultaneously loaded with different plastic deformation pressures. Remote operation and monitoring are carried out, and plastic deformation is ensured to be stably and gradually improved every 20-50MPA of pressurization and pressure stabilization process; (4) the stable and reliable high-pressure sealing device and the whole set of safety protection device avoid danger in the high-pressure operation process.

The invention utilizes the plastic deformation pressure far larger than the residual stress, thereby eliminating the influence of the processing residual stress, and the plastic deformation pressure far higher than the plastic deformation generated by the operation pressure can effectively offset the influence of the alternating stress during the operation, thereby effectively prolonging the fatigue life of the product.

Drawings

Fig. 1 is a schematic structural view of the tool of the present invention.

Fig. 2 is a schematic structural view of the cross-shaped through hole unit tool of the present invention.

Reference numerals: the device comprises a multistage supercharging power station 1, an operation monitoring platform unit 2, a high-pressure pipeline 3, a test auxiliary workbench 4, a detection holder unit 5, a protection pull 6, an upper pressing cap 7, an upper pressing cover 8, a cross intersecting hole unit tooling 9, a lower bottom cover 10, a workpiece 11, a high-pressure protection room 12, a horizontal shaft 13, a U-shaped sealing lip 14, a sealing support back ring 15, a nut 16, a suction hole plug 17, a drainage hole plug 19, a conical surface seal 18 and a valve spring 20.

Detailed Description

The figures of the present invention are further described below in conjunction with the embodiments.

A high-pressure plunger pump hydraulic cylinder self-reinforcing tool comprises a multistage pressurization power station 1, an operation monitoring platform unit 2, a high-pressure pipeline 3, a cross-shaped through hole unit tool 9 and a test auxiliary workbench 4;

high-pressure media are input into the hydraulic cylinder, the high-pressure media are conveyed as a power unit through a multistage supercharging power station 1, the multistage supercharging power station 1 conveys the high-pressure media through two groups of high-pressure pipelines 3, one end of one group of high-pressure pipelines 3 is connected with an outer cavity of the hydraulic cylinder, and the other end of the one group of high-pressure pipelines is communicated with one port of a cross-shaped through hole unit tool 9; one end of the other group of high-pressure pipelines 3 is connected with the inner cavity of the cylinder, and the other end is communicated with the other port of the cross-shaped through hole unit tool 9; the operation monitoring platform unit 2 is used for acquiring pressure values and leakage points in the process of two groups of high-pressure medium passages in real time; the cross-shaped through hole unit tool 9 is fixedly installed inside the test auxiliary workbench 4.

The multistage supercharging power station 1 is set in a multistage supercharging mode of a low-pressure pump, a medium-pressure pump and a high-pressure pump, and is used for independently and correspondingly emptying the cavity high-pressure medium in the processes of emptying, low-pressure loading, medium-pressure loading and high-pressure loading. The power station is used as a power unit for outputting high-pressure media, and the high-pressure media of 200-800MPA are stably output in a multi-stage increasing mode. A multi-stage pressurization mode is adopted, a low-pressure pump is used at low pressure, the large discharge capacity and low pressure are realized, the stamping can be carried out quickly, and the processes of cavity emptying and low-pressure loading are completed; the medium pressure pump is used for realizing medium displacement and medium pressure to finish the medium pressure loading process; the high-pressure pump has low discharge and high pressure, and completes the processes of high-pressure loading and high-pressure stabilizing and maintaining.

The power unit is connected to the cross through hole unit tool 9 by using the high-pressure pipeline 2, and the high-pressure pipeline 2 must meet the rated pressure requirement of the test. The two groups of high-pressure pipelines 2 are respectively and correspondingly connected with the outer cavity and the inner cavity of the hydraulic cylinder and simultaneously apply pressure to the inner cavity and the outer cavity. In the invention, different plastic deformation pressures are adopted for the inner cavity and the outer cavity of the hydraulic cylinder, and two paths of passages are used, so that all the inner cavity and the outer cavity can be simultaneously pressed, and the additional deformation is avoided, for example, when the inner cavity is pressed, the outer cavity is not pressed, and the outer cavity can be additionally deformed, and vice versa.

The operation monitoring platform unit 2 comprises a protective pull rod 6, an upper pressing cap 7, an upper pressing cover 8 and a lower bottom cover 10; the protection pull rods 6 are arranged in two groups at intervals in parallel, the upper ends of the protection pull rods are fixedly connected with the top end of the cross through hole unit tool in the vertical direction from top to bottom through upper pressing caps 7 and upper pressing covers 8, and the lower ends of the protection pull rods are fixedly connected with the bottom end of the cross through hole unit tool 9 in the vertical direction from top to bottom through lower bottom covers 10 and the other group of upper pressing caps 7.

Still include detection cloud platform unit 5, high pressure protection room 12, wherein high pressure protection room 12 is used for placing test auxiliary workbench 4 and cross through hole unit frock 9 mutually, 2 fixed mounting of platform unit are monitored in the operation outside high pressure protection room 12, detection cloud platform unit 5 sets up to multiunit camera device, independently fixed mounting is in the different positions of high pressure protection room 12 medial surface for the remote monitoring of implementation, monitoring pressure testing process, discovery leak source.

The invention controls the pressure boosting and stabilizing of the two channels in steps by operating the monitoring platform unit until the designed plastic deformation pressure is reached. Further, during setting, first pressure needs to be stably increased and appropriately maintained; the second and the second passages have different plastic deformation pressures due to different structures.

The plastic deformation process is defined as a progressive process, each pressure test step needs to be monitored, the plastic deformation result is ensured, each step is increased by 20-50Mpa, and the pressure is maintained for a period of time, so that the optimal plastic deformation effect is achieved.

Furthermore, the test auxiliary workbench 4 is provided with a pressure sensor, a data acquisition unit and an auxiliary monitoring unit, wherein the pressure sensor is fixedly arranged at different positions in the process of high-pressure medium access and is transmitted to the input end of the data acquisition unit by acquiring pressure values; the output end of the data acquisition unit transmits the pressure value to the auxiliary monitoring unit; and the auxiliary monitoring unit is used for analyzing and comparing the data and then outputting a working signal. The whole pressure test process is implemented through a precise pressure sensor, a data acquisition unit and an auxiliary monitoring unit.

The cross through hole unit tool 9 is sealed by adopting three sealing modes of a sealing structure, a U-shaped sealing lip sealing structure and a conical surface sealing structure, and particularly adopts three modes of O-shaped ring sealing, U-shaped sealing lip sealing and conical surface sealing to meet the sealing requirement of the plastic deformation required pressure.

The cross-shaped through hole unit tool 9 is a tool structure with a horizontal shaft 13 and a vertical shaft crossed at 90 degrees, and comprises a U-shaped sealing lip 14, a sealing support back ring 15, a nut 16, a suction hole plug 17, a drainage hole plug 19, a conical surface seal 18 and a valve spring 20.

The bottom of one end of the horizontal shaft 13 adopts a U-shaped sealing lip 14, and a sealing support back ring 15 and a nut 16 are sequentially arranged outside the U-shaped sealing lip 14; by adopting the sealing structure of the U-shaped sealing lip 14 and the sealing support back ring 15, the horizontal shaft 13 is matched with the screw thread and the nut 16, so that the horizontal end is tightly locked and sealed, and the high-pressure sealing at the horizontal end is realized.

Two ends of the vertical shaft are respectively provided with a suction hole plug 51 and a drainage hole plug 41, wherein the suction hole plug 17 is sequentially sealed by a conical surface sealing structure 18, an O-shaped ring sealing structure and a nut 16 from inside to outside, and the nut 16 is locked; a workpiece 11 is arranged on one side of the drainage hole plug 19, a valve spring 20 is arranged at the top end of the workpiece 11, and the part, extending out of the vertical shaft, of the workpiece 11 is hermetically arranged through a nut 16; the drainage hole plug 19 is fixedly arranged with a drainage pressure cap at the outer side.

A group of U-shaped sealing lips 14 are arranged at the gap position between the workpiece 11 and the nut 16; the valve spring 20 is used for a low pressure evacuation process; and a leakage port is formed in the drainage pressure cap, and is used for leakage of redundant media after the cavity of the hydraulic cylinder is filled with the media, and also marks that the cavity is emptied.

Safety device sets up to high pressure protection room 12, high pressure protection room 12 adopts alloy steel frame construction, frame construction's the outside is 10mm ~ 50mm steel sheet shrouding, and the inboard plank that sets up to 100mm ~ 200mm avoids the danger among the high pressure operation process for energy buffering when blasting absorbs instantaneous impact force.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.