CN106015134A - Performance test hydraulic test stand for hydrostatic guide way of heavy-duty numerical control machine table - Google Patents

Abstract

A hydraulic test bench for performance testing of a hydrostatic guide rail of a heavy-duty numerical control machine tool, which mainly includes: the stop valve B is connected to the vane pump; the vane pump is connected to the throttle valve C, throttle valve B, and stop valve A through a high-pressure filter; The throttle valve B is connected with the throttle valve A and the loading cylinder; the cylinder body of the loading cylinder is fixed, the plunger rod is pressed against the body of the static pressure guide rail, the throttle valve A is connected with the stop valve C; the throttle valve C is respectively connected with several needles Each needle valve is connected with a flowmeter, and the outlet of the flowmeter is respectively connected with the inlet of the corresponding static pressure support chamber; the outlet of each static pressure support chamber is connected with the hydraulic hose and combined, and is connected with the inlet of the stop valve C; each The pressure measuring holes of the static pressure bearing cavity are respectively connected with pressure gauges. The test bench has a simple structure and can realize the axial loading and measurement of the hydrostatic guide rail, the adjustment and detection of the bearing capacity of the support pad, etc., and provides technical support for the performance test and analysis of the dynamic hydrostatic guide rail.

Description

Hydraulic test bench for performance testing of hydrostatic guideway for heavy-duty CNC machine tools

technical field

The invention relates to a hydraulic device for performance testing of hydrostatic pressure support equipment.

Background technique

Due to the advantages of small friction coefficient, wide speed range, long service life, and heavy load without crawling, hydrostatic guide rails have been greatly developed in the field of heavy equipment. However, due to the many supporting oil chambers and complex structures of hydrostatic guide rails, the bearing capacity of each oil chamber is coupled with each other, and calculation and analysis are difficult. Therefore, it is necessary to use a simple and convenient guide rail performance test system to test the bearing capacity, static And the dynamic performance is tested to verify the accuracy of the calculation method of the bearing capacity of the hydrostatic guide rail under different oil supply methods.

The test bench can test the bearing capacity, oil film stiffness, static and dynamic performance of the hydrostatic guide rail, and improve the design accuracy of the guide rail system.

Contents of the invention

The object of the present invention is to provide a hydraulic test bench (hereinafter referred to as the test bench) for heavy-duty numerically controlled machine tool hydrostatic guideway performance testing that can simply and conveniently test the bearing capacity, oil film stiffness, static and dynamic performance of the hydrostatic guideway.

The test bench mainly includes: air filter, oil suction filter, overflow valve, quantitative vane pump, motor, accumulator, throttle valve A, B, C, pressure gauge, needle valve, flow meter, liquid level gauge , Liquid temperature gauge, oil return filter, heater, cooler, hydraulic hose, plunger cylinder, globe valve A, B, C, flip-chip filter, etc. and static pressure guide rail. The specific structure is as follows:

The air filter is installed on the fuel tank, and it is better to have a liquid level gauge, a thermometer and a heater on the fuel tank; the inlet of the stop valve B is connected to the fuel tank, and the outlet is connected to the filter inlet; the outlet of the oil suction filter is connected to the vane pump The inlet is connected; the outlet of the vane pump is connected with the inlet of the high pressure filter, the pressure gauge and the relief valve respectively; the outlet of the relief valve is connected with the oil tank; the outlet of the high pressure filter is connected with the throttle valve C, the throttle valve B The inlet of valve A is connected; the outlet of stop valve A is connected with the inlet of accumulator; the outlet of throttle valve B is connected with the inlet of throttle valve A and the inlet of loading cylinder respectively; the cylinder body of loading cylinder is fixed, and the plunger rod The outlet of the throttle valve A is connected to the inlet of the shut-off valve C; the outlet of the shut-off valve C is connected to the inlet of the air cooler; the outlet of the air cooler is connected to the inlet of the oil return filter; The outlet of the oil filter is connected to the oil tank; the outlet of the throttle valve C is connected to the inlets of several needle valves; the outlets of each needle valve are connected to the inlet of a flowmeter, and the outlets of the flowmeter are respectively connected to the corresponding static pressure bearing chamber. The inlet; the outlet of each static pressure support chamber is connected with the hydraulic rubber hose and merged together, and is connected with the inlet of the stop valve C; the pressure measuring holes of each static pressure support chamber are respectively connected with the pressure gauge.

The experimental hydrostatic guide rail of the test bench can be supported by up to 12 independently controlled hydrostatic support chambers, which can limit the five degrees of freedom of the guide rail except for linear motion. The guide rail of the test bench is loaded by a plunger loading cylinder, and the inlet of the hydraulic cylinder is connected in parallel between two throttle valves and adjusted by the principle of a liquid bridge. The bearing capacity of each static pressure support chamber is measured by a pressure gauge at the front end of the oil chamber, and adjusted by a needle valve to ensure that the oil film thickness of each oil chamber can be adjusted.

Compared with the prior art, the present invention has the following advantages:

1. The structure of this test bench is simple, and it can realize the axial loading and measurement of the hydrostatic guide rail of the heavy-duty CNC machine tool, the adjustment and detection of the bearing capacity of the support pad, etc., and provides technical support for the performance test and analysis of the dynamic hydrostatic guide rail.

2. This test bench can test the bearing capacity and dynamic and static characteristics of the hydrostatic guideway of heavy-duty CNC machine tools, improve the design accuracy and reliability of the guideway system, and then improve the operating life of the guideway system.

3. This test bench can test the bearing capacity, stiffness and static, dynamic and vibration performance indicators of the guide rail.

Description of drawings

Fig. 1 is a schematic diagram of the connection relationship of each part of the present invention;

Fig. 2 is a three-dimensional schematic diagram of the present invention;

Fig. 3 is a schematic diagram of the front view of the present invention;

Fig. 4 is a schematic schematic diagram of a three-dimensional enlarged part of the hydrostatic guide rail of the present invention;

Fig. 5 is a schematic perspective view of the fuel tank of the present invention.

In the figure: 1. Air filter, 2. Oil suction filter, 3. Relief valve, 4. Vane pump, 5. Motor, 6. Accumulator, 7.1, Throttle valve A, 7.2, Throttle valve B , 8.1-8.13, pressure gauge, 9.1-9.12, needle valve, 10.1-10.12 flow meter, 11, liquid level gauge, 12, thermometer, 13, oil return filter, 14, heater, 15, air cooler, 16 , hydraulic hose, 17, loading cylinder, 18.1, stop valve A, 18.2, stop valve B, 18.3, stop valve C, 19, throttle valve C, 20, high pressure filter, 21, static pressure guide rail, 22, oil tank, 23. Oil circuit manifold A, 24. Platform, 25. Manifold B, 26. Oil inlet, 27. Oil return port, 28. Pressure measuring port, 29. Oil circuit manifold mounting platform, 30. Oil return pipe installation Platform, 31, air filter installation platform, 32, oil suction pipe installation platform, 33, motor installation platform, 34, side has accumulator installation platform, 35, lifting lug, 36, heater installation flange.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below in conjunction with the accompanying drawings:

In the schematic diagram of the connection relationship between the components of the hydrostatic guideway performance test hydraulic test bench for heavy-duty CNC machine tools shown in Figure 1, an air filter is provided on the oil tank 22 with a liquid level gauge 11, a thermometer 12 and a heater 14 1. The inlet of the stop valve B18.2 is connected to the oil tank 22, and the outlet is connected to the inlet of the oil suction filter 2; the outlet of the oil suction filter 2 is connected to the inlet of the vane pump 4, and the outlet of the vane pump 4 is respectively connected to the filter 20 and the pressure gauge 8.1 , the inlet of overflow valve 3 is connected; the outlet of overflow valve 3 is connected with oil tank 22; the outlet of high-pressure filter 20 is connected with the inlet of throttle valve C19, throttle valve B7.2, and stop valve A18.1 respectively; The outlet of valve A18.1 is connected with the inlet of accumulator 6; the outlet of throttle valve B7.2 is respectively connected with the inlet of throttle valve A7.1 and the inlet of loading cylinder 17; the cylinder body of loading cylinder 17 is fixed, and the column The plug rod is pushed against the body of the static pressure guide rail 21; the outlet of the throttle valve A7.1 is connected with the inlet of the shut-off valve C18.3; the outlet of the shut-off valve C18.3 is connected with the inlet of the air cooler 15; the outlet of the air cooler 15 The outlet is connected to the inlet of the oil return filter 13; the outlet of the oil return filter 13 is connected to the oil tank 22; the outlet of the throttle valve C19 is connected to the inlet of the needle valve 9.1-9.6; the outlet of the needle valve 9.1-9.6 is connected to the flow rate The inlets of gauges 10.1-10.6 are connected; the outlets of flowmeters 10.1-10.6 are respectively connected to the inlets of the corresponding static pressure bearing chambers; the outlets of each static pressure bearing chamber are connected and merged with hydraulic hose 16, and are jointly connected with the inlet of stop valve C18.3 ; The pressure measuring holes of each static pressure bearing chamber are connected with pressure gauges 8.2-8.7 respectively.

The models of each component in Fig. 1 are: air filter (1) is EF-32; overflow valve (3) is YF-B10B; vane pump (4) is YB1-25; motor (5) is Y132M1- 6; accumulator (6) is NXQ2-L6.3/*-H; throttle valve (7.1-7.2, 19) is MG10G1.2; pressure gauge (8.1-8.7) is YN100T; needle valve (9.1- 9.6) is covna/HKZ-09; flow meter (10.1-10.6) is SBL; liquid level gauge (11) is XYW-127; liquid temperature gauge (12) is YWZ-127T; oil return filter (13) is RFB -25%x*Y; heater (14) is SRY2-220/1; cooler (15) is FL-2; hydraulic hose (16) is HG4-406-75; loading cylinder (17) is plunger cylinder , the model is YZG-100%xS; the stop valve (18.1-18.3) is XJF-20/10. The rated working pressure of this test bench is 3MPa, and the theoretical working flow rate is 25L/min; the lubricating medium is VG-15 anti-wear hydraulic oil, and the system oil temperature is controlled within the range of 30-50°C.

In Fig. 2 and Fig. 3, the hydraulic test bench for hydrostatic guide rail performance test of heavy-duty numerical control machine tools is shown in the three-dimensional and front schematic diagrams, below which there is a loading cylinder 17 and a hydrostatic guide rail 21 with pressure gauges 8.1-8.12, Needle valve 9.1-9.12, integrated block B25, fuel tank 22, etc. are arranged on a platform 24 welded by steel plates; the side wall is provided with a liquid level gauge 11, a heater 14, and the fuel tank 22 of the accumulator 6 is provided with a motor 5, Vane pump 4, high pressure filter 20, oil return filter 13, air filter 1, oil circuit manifold A23 and other components; static pressure guide rail 21, needle valve 9.1-9.12, and oil circuit manifold 23 use hydraulic hoses 16 connections. The oil passage manifold A23 and the oil passage manifold B25 are a cube metal block with holes in different directions and depths as oil passages.

In Fig. 4, the three-dimensional enlarged schematic diagram of the hydrostatic guide rail part of the present invention, the oil inlet 26, the oil return port 27 and the pressure measurement port 28 of each oil chamber are arranged on the side of the hydrostatic guide rail 21, so that the hydraulic hose 16 installation and layout. Four static pressure support cavities are arranged on the upper and lower parts of the static pressure guide rail (21), and two static pressure support cavities are respectively arranged on the left and right sides.

In the three-dimensional schematic diagram of the fuel tank of the present invention shown in Figure 5, the fuel tank 22 welded by steel plates is rectangular, and the top surface is provided with an integrated block mounting platform 29, an oil return pipe mounting platform 30, an air filter mounting platform 31, Oil suction pipe installation platform 32, motor installation platform 33; side is provided with accumulator installation platform 34, lifting lug 35 and heater installation flange 36 etc.

The working process of the test bench is roughly as follows:

①Open the overflow valve 3 to the maximum, close the throttle valve 19 and the throttle valve B7.2;

② Start the motor 5, gradually close the overflow valve 3, and observe the pressure gauge 8.1; when the pressure reaches 6MPa, lock the overflow valve 3;

③ Open throttle valve 19, throttle valve 7.2 and throttle valve 7.1;

④Adjust the needle valve 9.1~9.6, observe the pressure gauge 8.2~8.7; stop adjusting when the pressure reaches 3MPa;

⑤ Read the flow rate of the flowmeter 10.1~10.6; combine the pressure of the pressure gauge 8.1~8.6 to calculate the thickness of the static pressure oil film;

⑥Adjust throttle valve 7.1 and throttle valve 7.2, observe the pressure of pressure gauge 8.8, and calculate the load exerted by plunger cylinder 17;

⑦ Read the pressure of the pressure gauge 8.2~8.7 and the flow rate of the flow meter 10.1~10.6 again, and calculate the static pressure oil film thickness, bearing capacity, static stiffness and other performance indicators again.

Claims (3)

1. a heavy digital control machine tool hydrostatic slideway performance test hydraulic test bench, its Being characterised by: the import of stop valve B is connected with fuel tank, outlet is connected with filter inlet； The outlet of oil absorption filter is connected with vane pump import；Blade delivery side of pump respectively with high pressure Filter, piezometer, the import of overflow valve are connected；The outlet of overflow valve is connected with fuel tank； The outlet of high pressure filter respectively with choke valve C, choke valve B, the import of stop valve A It is connected；The outlet of stop valve A is connected with the import of accumulator；The outlet of choke valve B divides It is not connected with import, the import of loading cylinder of throttle valve A；The cylinder body loading cylinder is fixed, Plunger rod withstands on hydrostatic slideway body, the outlet of throttle valve A and the import of shutoff valve C It is connected；The outlet of shutoff valve C is connected with the import of forced air cooler；The outlet of forced air cooler It is connected with the import of return filter；The outlet of return filter is connected with fuel tank；Throttling The outlet of valve C import with some needle-valves respectively is connected；The outlet of each needle-valve each with one The import of effusion meter is connected, and the outlet of effusion meter connects the import in corresponding hydrostatic support chamber respectively； The outlet in each hydrostatic support chamber is connected with hydralic hose and merges, common and shutoff valve C Import is connected；The pressure tap in each hydrostatic support chamber is connected with Pressure gauge respectively.

Heavy digital control machine tool hydrostatic slideway performance the most according to claim 1 is surveyed Examination hydraulic test bench, it is characterised in that: be additionally provided with on this fuel tank liquidometer, thermometer and Heater.

Heavy digital control machine tool hydrostatic slideway performance the most according to claim 1 is surveyed Examination hydraulic test bench, it is characterised in that: air filter is installed on fuel tank.