CN110595700A - Static pressure bearing leakage test experiment table - Google Patents
Static pressure bearing leakage test experiment table Download PDFInfo
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- CN110595700A CN110595700A CN201910796813.9A CN201910796813A CN110595700A CN 110595700 A CN110595700 A CN 110595700A CN 201910796813 A CN201910796813 A CN 201910796813A CN 110595700 A CN110595700 A CN 110595700A
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- test piece
- shaft
- sealed container
- static pressure
- side plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a static pressure bearing leakage test experiment table, which comprises a pump, a sealed container and a shaft test piece, wherein the outlet of the pump is communicated with the inlet of the sealed container through a pipeline, and the pipeline is provided with a flowmeter and a pressure gauge; the shaft test piece is a three-way tubular piece, a liquid through hole at the upper end of the shaft test piece is communicated with an inlet of the sealed container, and the left end and the right end of the shaft test piece are supported in the sealed container and are in clearance fit with the sealed container; static pressure bearing holes are symmetrically formed in the pipe walls at the left end and the right end of the shaft test piece, and the static pressure bearing holes are located at the positions where the shaft test piece and the sealed container are in clearance fit. The shaft sleeve test piece and the shaft test piece with different sizes can be replaced to be used for the leakage characteristic research of different static pressure bearing structures. The invention provides a leakage characteristic test experiment table of a static pressure supporting structure, which has the advantages of simple structure and convenience in disassembly and assembly.
Description
Technical Field
The invention belongs to the field of hydraulic transmission control, and particularly relates to a leakage test of a static pressure supporting structure, which is particularly suitable for a supporting leakage characteristic test of a swing cylinder pair static pressure supporting structure of a swing cylinder type pump/motor structure.
Background
In the field of hydraulic engineering, a structure with large bearing capacity and small friction force is often needed, such as bearings of various precision machine tools and generating sets, a tilt cylinder pair of a tilt cylinder motor, a servo actuator and the like, and static pressure, dynamic pressure or static pressure supporting structures are widely adopted in the metallurgy, electric power, mechanical manufacturing, hydraulic industry and the like at present, but the dynamic pressure effect is not obvious under the condition of low speed, and only static pressure supporting can be adopted. The static pressure bearing supplies fluid with certain pressure between the friction surfaces by an external fluid pressure source, the static pressure bearing is carried by the static pressure of the fluid, the structural characteristics of the static pressure bearing directly influence the carrying capacity of the static pressure bearing, and certain leakage exists while carrying, so that the energy consumption of a system is directly influenced.
The current visible static pressure supporting performance test bench is mainly directed at a sliding shoe or a valve plate structure of a pump/motor, and cannot meet the working characteristic research of an annular gap static pressure supporting structure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a static pressure bearing leakage test bench which is used for testing the bearing leakage characteristics of an annular surface static pressure bearing structure and is particularly suitable for testing the bearing leakage characteristics of a swinging cylinder auxiliary static pressure bearing structure of a swinging cylinder type pump/motor structure.
In order to achieve the purpose, the invention adopts the following scheme: a static pressure bearing leakage test experiment table comprises a pump, a sealed container and a shaft test piece, wherein an outlet of the pump is communicated with an inlet of the sealed container through a pipeline, and a flow meter and a pressure gauge are arranged on the pipeline; the shaft test piece is a three-way tubular piece, a liquid through hole at the upper end of the shaft test piece is communicated with an inlet of the sealed container, and the left end and the right end of the shaft test piece are supported in the sealed container and are in clearance fit with the sealed container; static pressure bearing holes are symmetrically formed in the pipe walls at the left end and the right end of the shaft test piece, and the static pressure bearing holes are located at the positions where the shaft test piece and the sealed container are in clearance fit.
Further, the outlet of the pump is also connected with a pressure control valve through a pipeline.
Furthermore, the sealed container is mainly enclosed by a first side plate, a second side plate, a support and a pressurizing cover plate, the first side plate and the second side plate are respectively fixed at the left end and the right end of the support, and the pressurizing cover plate is fixed at the upper end of the support.
Further, shaft sleeve mounting holes are formed in the first side plate and the second side plate, shaft sleeve test pieces are mounted in the shaft sleeve mounting holes, and the left end and the right end of each shaft test piece are supported on the corresponding shaft sleeve test pieces.
Furthermore, a through hole is formed in the pressurizing cover plate, a boss is machined on the pressurizing cover plate, and the boss is in clearance fit with the liquid through hole in the shaft test piece and is sealed through a sealing ring.
Furthermore, a sealing groove is formed in the liquid through hole, and the sealing ring is installed in the sealing groove.
Further, the tee-joint tubular part is an inverted T-shaped tee-joint tubular part.
Further, the first shaft sleeve test piece and the second shaft sleeve test piece have the same structure, and the first side plate and the second side plate have the same structure.
Furthermore, a liquid discharge hole is formed below the support.
Furthermore, a liquid discharge pipe is connected to the liquid discharge hole.
The invention has the beneficial effects that: the invention has simple integral structure, convenient installation and convenient time disassembly and assembly in the experimental process, and can be used for the leakage characteristic test of structures with different sealing lengths, shaft diameters or static pressure bearing holes; different experimental pressures and loading forces can be input into the test piece through setting the working pressure of the pressure control valve.
Drawings
FIG. 1 is an exploded view of a hydrostatic bearing leak test rig;
FIG. 2 is a schematic view of a cover plate structure;
FIG. 3 is a schematic view of a shaft specimen configuration;
FIG. 4 is a schematic view of a shaft sleeve test piece structure;
FIG. 5 is a side panel construction schematic;
FIG. 6 is a schematic view of a stent structure;
FIG. 7 is an assembled view of a hydrostatic bearing leak test rig;
in the figure: 1. a pressurizing cover plate; 2. a shaft test piece; 3. a seal ring; 4. a support; 5. a first sleeve test piece; 6. a first side plate; 7. a liquid discharge pipe; 8. a second shaft sleeve test piece; 9. a second side plate; 10. a pump; 11. a pressure control valve; 12. a flow meter; 13. and a pressure gauge.
Detailed description of the preferred embodiment
The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings that illustrate only the basic structure of the present invention and, therefore, only show the structures related to the present invention.
As shown in fig. 1-7, the static pressure bearing leakage test experiment table comprises a pump 10, a sealed container and a shaft test piece 2, wherein an outlet of the pump 10 is communicated with an inlet of the sealed container through a pipeline, and a flow meter 12 and a pressure gauge 13 are arranged on the pipeline; the shaft test piece 2 is a three-way tubular piece, a liquid through hole 2-1 at the upper end of the shaft test piece is communicated with an inlet of a sealed container, and the left end and the right end of the shaft test piece are supported in the sealed container and are in clearance fit with the sealed container; static pressure bearing holes 2-4 are symmetrically formed in the pipe walls at the left end and the right end of the shaft test piece 2, and the static pressure bearing holes 2-4 are located at the position where the shaft test piece is in clearance fit with the sealed container.
The outlet of the pump 10 is also connected to a pressure control valve 11 for regulating the pressure.
The sealed container is mainly enclosed by a first side plate 6, a second side plate 9, a support 4 and a pressurizing cover plate 1 to form, the first side plate 6 and the second side plate 9 are respectively fixed at the left end and the right end of the support 4, and the pressurizing cover plate 1 is fixed at the upper end of the support 4.
As shown in fig. 1, 4, 5 and 7, the first shaft sleeve test piece 5 and the second shaft sleeve test piece 8 have the same structural size parameters, positioning mounting holes 8-1 are uniformly distributed on the side surfaces, and through holes 8-2 are formed inside the positioning mounting holes; the first side plate 6 and the second side plate 9 have the same structure, and the side plates are provided with shaft sleeve mounting holes 9-3 and shaft sleeve fixing threaded holes 9-4; the second shaft sleeve test piece 8 is arranged in a shaft sleeve mounting hole 9-3 formed in the second side plate 9 and is fixedly arranged on the first side plate 9 through a positioning mounting hole 8-1 and a shaft sleeve fixing threaded hole 9-4, and the same first shaft sleeve test piece 5 is arranged in the first side plate 6.
As shown in fig. 1, 3, 4 and 7, the shaft test piece 2 is a three-way tubular piece, the three-way tubular piece is an inverted T-shaped three-way tubular piece, through holes 2-3 are formed in end surfaces of two sides of the shaft test piece 2, and static pressure bearing holes 2-4 are symmetrically processed at the left end and the right end of each through hole 2-3; a boss is processed in the middle of the shaft test piece 2, a liquid through hole 2-1 is processed in the boss, the liquid through hole 2-1 is vertical to the axis of the through hole 2-3 at the two ends and is parallel to the axis of the static pressure bearing hole 2-4, and a sealing groove 2-2 is formed in the liquid through hole 2-1; and two ends of the shaft test piece 2 are in clearance fit with the first shaft sleeve test piece 5 and the second shaft sleeve test piece 8.
As shown in fig. 1, 6 and 7, a threaded fixing hole 4-2, a sealing groove and a liquid discharge hole are formed in the bracket 4, and the first side plate 6 and the second side plate 9 on the two sides are installed on the bracket 4 through the threaded fixing hole to form a sealed container; a liquid discharge hole 4-3 is arranged below the bracket 4, and a liquid discharge pipe 7 is connected on the liquid discharge hole 4-3.
As shown in fig. 1, 2 and 7, a high-pressure pipeline interface 1-1, a boss 1-3 and a fixing hole 1-2 are arranged on a pressurizing cover plate 1, and the boss 1-3 of the pressurizing cover plate 1 is in clearance fit with a liquid through hole 2-1 on a shaft test piece 2 and can relatively move in the axial direction; the sealing ring component 3 is arranged in a sealing groove 2-2 formed in the shaft test piece 2, and leakage when the boss 1-3 is in clearance fit with the liquid through hole 2-1 is prevented.
The working principle is as follows: as shown in fig. 1 and 7, a high-pressure pipeline interface 1-1 on a pressurizing cover plate 1 is connected with an outlet of a pump 10, the control pressure of a pressure control valve 11 is adjusted to realize the control of the pressure of a through hole, a static pressure bearing lubricating film is formed between a shaft test piece 2 and a first shaft sleeve test piece 5 and a second shaft sleeve test piece 8 through symmetrical static pressure bearing holes 2-4, and the loading force is the product of the surface area of a boss 1-3 on the cover plate 1 and the loading pressure; the flowmeter 12 is used for measuring the leakage rate between the shaft test piece 2 and the first shaft sleeve test piece 5 and the second shaft sleeve test piece 8 under the experimental pressure; the static pressure bearing leakage characteristics under different loading force and static pressure bearing structures can be simulated through designing and processing the boss 1-3 diameter, the shaft test piece 2 diameter, the static pressure bearing hole 2-4, the first shaft sleeve test piece and the second shaft sleeve test piece with different parameters.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: without departing from the working principle of the invention, improvements and refinements can be made, and the improvements and refinements should be regarded as the protection scope of the invention.
Claims (10)
1. A static pressure bearing leakage test experiment table is characterized by comprising a pump, a sealed container and a shaft test piece, wherein an outlet of the pump is communicated with an inlet of the sealed container through a pipeline, and a flowmeter and a pressure gauge are arranged on the pipeline; the shaft test piece is a three-way tubular piece, a liquid through hole at the upper end of the shaft test piece is communicated with an inlet of the sealed container, and the left end and the right end of the shaft test piece are supported in the sealed container and are in clearance fit with the sealed container; static pressure bearing holes are symmetrically formed in the pipe walls at the left end and the right end of the shaft test piece, and the static pressure bearing holes are located at the positions where the shaft test piece and the sealed container are in clearance fit.
2. The hydrostatic bearing leakage test bench of claim 1, wherein the outlet of the pump is further connected to a pressure control valve via a pipeline.
3. The hydrostatic bearing leakage test bench of claim 2, wherein the sealed container is mainly enclosed by a first side plate, a second side plate, a bracket and a pressure cover plate, the first side plate and the second side plate are respectively fixed at the left end and the right end of the bracket, and the pressure cover plate is fixed at the upper end of the bracket.
4. The hydrostatic bearing leakage test bench of claim 3, wherein the first side plate and the second side plate are both provided with shaft sleeve mounting holes, shaft sleeve test pieces are mounted on the shaft sleeve mounting holes, and the left end and the right end of each shaft test piece are supported on the corresponding shaft sleeve test pieces.
5. The hydrostatic bearing leakage test experiment table as claimed in claim 4, wherein the pressurizing cover plate is provided with a through hole and a boss, the boss is in clearance fit with the liquid through hole on the shaft test piece and is sealed by a sealing ring.
6. The hydrostatic bearing leakage test experiment table of claim 5, wherein the liquid through hole is provided with a sealing groove, and the sealing ring is installed in the sealing groove.
7. The hydrostatic bearing leak test bench of claim 6, wherein the tee tubular member is a T-shaped tee tubular member.
8. The hydrostatic bearing leak test bench of claim 7, wherein the first sleeve test piece and the second sleeve test piece have the same structure, and the first side plate and the second side plate have the same structure.
9. The hydrostatic bearing leakage test bench of claim 8, wherein a drain hole is formed below the bracket.
10. The hydrostatic bearing leak test bench of claim 9, wherein a drain is connected to the drain hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796813.9A CN110595700B (en) | 2019-08-27 | 2019-08-27 | Static pressure bearing leakage test experiment table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910796813.9A CN110595700B (en) | 2019-08-27 | 2019-08-27 | Static pressure bearing leakage test experiment table |
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| Publication Number | Publication Date |
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| CN110595700A true CN110595700A (en) | 2019-12-20 |
| CN110595700B CN110595700B (en) | 2021-03-23 |
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| CN201910796813.9A Active CN110595700B (en) | 2019-08-27 | 2019-08-27 | Static pressure bearing leakage test experiment table |
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| WO2018136444A9 (en) * | 2017-01-17 | 2018-09-07 | Pressure Technologies LLC | Improved apparatus for hydrostatic testing |
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2019
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| CN107843397A (en) * | 2017-11-15 | 2018-03-27 | 安徽玄同工业设计有限公司 | Oil piping system pipe joint tightness test device |
| CN207848993U (en) * | 2018-01-11 | 2018-09-11 | 射阳天源化工有限公司 | A kind of high steam pipeline leakage protection from hazards device |
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| CN110595700B (en) | 2021-03-23 |
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