Honing machine valve group
By designing a dual hydraulic control check valve group in the honing machine hydraulic system, the problems of dull response and rotation grinding control delay of the existing system are solved, and the rapid response of the hydraulic motor after reversing operation is achieved, improving the system's movement stability and control accuracy.
Patent Information
- Application Number
- CN202421611672.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The existing honing machine hydraulic systems have problems with dull response and delay in rotation grinding control.
A new honing machine valve group is designed, adopting a dual hydraulically controlled check valve group, including a first hydraulically controlled check valve group and a second hydraulically controlled check valve group, close to the hydraulic motor and the third reversing valve, ensuring rapid response during reversing operation.
Through this design, the hydraulic motor can respond quickly after the commutation operation, improving the movement stability and control accuracy of the honing machine.
Smart Images
Figure CN222910391U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the hydraulic system of a honing machine, in particular to a valve group of a honing machine. Background Art
[0002] In a honing machine, the hydraulic system is a key part, which determines the smoothness, safety, reliability, accuracy, etc. of the movement of each component. It mainly includes rotary grinding, reciprocating movement, pressing plate, lifting, translation, and expansion movement. In the currently used hydraulic system of a honing machine, there are problems such as slow response of the hydraulic system and delay in rotary grinding control, and a new type of valve group of a honing machine needs to be designed. Summary of the Utility Model
[0003] The purpose of the utility model is to solve the defects existing in the prior art, and a valve group of a honing machine is proposed.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] The valve group of a honing machine includes:
[0006] An oil tank;
[0007] A first oil supply circuit, the oil inlet of the first oil supply circuit is located inside the oil tank, an axial piston variable pump group of a distribution motor is installed on the first oil supply circuit, and the first oil supply circuit has a first branch and a second branch;
[0008] The first branch of the first oil supply circuit is used to supply oil to a hydraulic motor, the second branch of the first oil supply circuit is used to supply oil to a reciprocating oil cylinder, and a first logic valve, a third reversing valve, and a double pilot-operated check valve group are installed on the first branch of the first oil supply circuit. The double pilot-operated check valve group includes: a first pilot-operated check valve group and a second pilot-operated check valve group. The first pilot-operated check valve group is close to the hydraulic motor, the second pilot-operated check valve group is close to the third reversing valve, and a second logic valve, a fourth reversing valve, and a second pilot-operated check valve are installed on the second branch of the first oil supply circuit.
[0009] A first shuttle valve, a second shuttle valve, and a third shuttle valve. Both oil circuits of the reciprocating oil cylinder are connected to both ends of the first shuttle valve through throttle pipelines. The oil outlet of the first shuttle valve is connected to the control port of the first logic valve. Both oil circuits of the reciprocating oil cylinder are connected to both ends of the second shuttle valve through throttle pipelines. The oil outlet of the second shuttle valve is connected to the control port of the second logic valve. The control ports of the first logic valve and the second logic valve are connected to both ends of the third shuttle valve, and the oil outlet of the third shuttle valve is connected to the oil tank;
[0010] A second oil supply circuit, the oil inlet of the second oil supply circuit is located inside the oil tank, a motor pump group is installed on the second oil supply circuit, and the second oil supply circuit has three first branches and one second branch;
[0011] The three first branches of the second oil supply line are respectively used to supply oil to the platen cylinder, the translation cylinder, and the lifting cylinder. The second branch of the second oil supply line supplies oil to the expansion cylinder. A first reversing valve, a first pilot-operated check valve, and a stacked pilot-operated check valve are installed on each of the first branches of the second oil supply line. A proportional pressure reducing valve and a second reversing valve are installed on the second branch of the second oil supply line;
[0012] Oil return line. One end of the oil return line is connected to the fuel tank, and the other end is connected to the oil return ports of the third reversing valve, the fourth reversing valve, the first reversing valve, the second reversing valve, and the overflow port of the proportional pressure reducing valve.
[0013] As a further description of the above technical solution:
[0014] A pressure line filter is installed on the first oil supply line.
[0015] As a further description of the above technical solution:
[0016] An oil return filter is installed on the oil return line.
[0017] As a further description of the above technical solution:
[0018] A pressure sensor and a liquid level gauge are arranged in the fuel tank.
[0019] As a further description of the above technical solution:
[0020] A first pressure gauge is arranged on the first branch of the second oil supply line, and a second pressure gauge is installed at the oil outlet of the proportional pressure reducing valve.
[0021] As a further description of the above technical solution:
[0022] The second reversing valve is a three-position four-way electromagnetic reversing valve with an "O" type center function.
[0023] As a further description of the above technical solution:
[0024] A third branch pipe is arranged between the first oil supply line and the oil return line, and a second proportional pressure reducing valve is installed on the third branch pipe.
[0025] The utility model has the following beneficial effects:
[0026] 1. Compared with the prior art, for the valve group of this honing machine, by reasonably designing the double pilot-operated check valve group, the double pilot-operated check valve group includes the first pilot-operated check valve group and the second pilot-operated check valve group. The first pilot-operated check valve group is close to the hydraulic motor, and the second pilot-operated check valve group is close to the third reversing valve. The pipeline between the third reversing valve and the hydraulic motor can seal the pressure oil. During the reversing operation, after the third reversing valve switches its valve position, the hydraulic motor can respond quickly. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is the schematic diagram of the valve group of the honing machine proposed by the present utility model;
[0028] Figure 2 is Figure 1 the partial enlarged view at B in
[0029] Figure 3 is Figure 1 the partial enlarged view at A in
[0030] LEGEND DESCRIPTION:
[0031] 1. Axial piston variable pump group of the distribution motor; 2. Pressure pipeline filter; 3. Oil tank; 4. Pressure sensor; 5. Liquid level gauge; 6. Motor pump group; 7. Return oil filter; 8. Clamping oil cylinder; 9. Translation oil cylinder; 10. Lifting oil cylinder; 11. Expansion oil cylinder; 12. First reversing valve; 13. First pilot-operated check valve; 14. Stacked pilot-operated check valve; 15. Proportional pressure reducing valve; 16. Second reversing valve; 17. Hydraulic motor; 18. Reciprocating oil cylinder; 19. Third reversing valve; 20. Double pilot-operated check valve group; 20a. First pilot-operated check valve group; 20b. Second pilot-operated check valve group; 21. Fourth reversing valve; 22. Second pilot-operated check valve; 23. First logic valve; 24. Second logic valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] Refer to Figures 1-3, the valve group of the honing machine provided by the utility model includes: an oil tank 3, a first oil supply circuit, a second oil supply circuit, and a return oil circuit. The oil tank 3 is used to store hydraulic oil. In the valve group of the honing machine, a fuel tank with a volume of 1000L can be selected. The inlet of the first oil supply circuit is located inside the oil tank. An axial piston variable pump group 1 of a matching motor is installed on the first oil supply circuit. The axial piston variable pump group 1 of the matching motor is energized to supply high-pressure oil into the first oil supply circuit. The first oil supply circuit has a first branch and a second branch, that is, the first oil supply circuit uses a branch pipe structure to divide into the first branch and the second branch. The first branch of the first oil supply circuit is used to supply oil to the hydraulic motor 17 to drive the hydraulic motor 17 to rotate (rotary grinding). Since the forward / reverse switching needs to be controlled during the rotary grinding process, in a conventional hydraulic system, after operating the reversing valve, it takes a certain period of time for the hydraulic motor 17 to reverse. In this solution, a first logic valve 23, a third reversing valve 19, and a double hydraulic control check valve group 20 are installed on the first branch of the first oil supply circuit. The double hydraulic control check valve group 20 includes: a first hydraulic control check valve group 20a and a second hydraulic control check valve group 20b. The first hydraulic control check valve group 20a is close to the hydraulic motor 17, and the second hydraulic control check valve group 20b is close to the third reversing valve 19, which ensures that the pressure oil can be sealed in the pipeline between the third reversing valve 19 and the hydraulic motor 17. During the reversing operation, the hydraulic motor 17 can respond quickly after the third reversing valve 19 switches its valve position. The first logic valve 23 is used to control the on / off of the first branch of the first oil supply circuit, that is, when the hydraulic oil pressure in the pipeline between the third reversing valve 19 and the hydraulic motor 17 is too high, the first branch of the first oil supply circuit is briefly cut off to ensure the stable operation of the hydraulic motor 17; the second branch of the first oil supply circuit is used to supply oil to the reciprocating oil cylinder 18. A second logic valve 24, a fourth reversing valve 21, and a second hydraulic control check valve 22 are installed on the second branch of the first oil supply circuit. The second hydraulic control check valve 22 is used to keep the inlet / outlet oil circuit of the reciprocating oil cylinder 18 from discharging pressure and keep the reciprocating oil cylinder 18 fixed in position when not supplying oil. The second logic valve 24 is used to control the on / off of the second branch of the first oil supply circuit, that is, when the hydraulic oil pressure in the pipeline between the fourth reversing valve 21 and the reciprocating oil cylinder 18 is too high, the second branch of the first oil supply circuit is briefly cut off to ensure the stable operation of the reciprocating oil cylinder 18.
[0033] To specifically implement the functions of the first logic valve 23 and the second logic valve 24, it is also necessary to connect both oil circuits of the reciprocating oil cylinder 18 to both ends of the first shuttle valve through throttle pipes. The oil outlet of the first shuttle valve is connected to the control port of the first logic valve 23. That is, if the pressure in one of the two oil circuits of the reciprocating oil cylinder 18 is relatively high, hydraulic oil will flow through the first shuttle valve to the control port of the first logic valve 23, causing the first logic valve 23 to close. Both oil circuits of the reciprocating oil cylinder 18 are connected to both ends of the second shuttle valve through throttle pipes. The oil outlet of the second shuttle valve is connected to the control port of the second logic valve 24. The control ports of the first logic valve 23 and the second logic valve 24 are connected to both ends of the third shuttle valve, and the oil outlet of the third shuttle valve is connected to the oil tank.
[0034] The oil inlet of the second oil supply circuit is located inside the oil tank. An electric motor pump unit 6 is installed on the second oil supply circuit. When the electric motor pump unit 6 is powered on, the second oil supply circuit can supply high-pressure oil. The second oil supply circuit has three first branches and one second branch. The three first branches of the second oil supply circuit are respectively used to supply oil to the platen cylinder 8, the translation cylinder 9, and the lifting cylinder 10. The second branch of the second oil supply circuit supplies oil to the expansion cylinder 11. First reversing valves 12, first pilot-operated check valves 13, and stacked pilot-operated check valves 14 are installed on the first branches of the second oil supply circuit. A proportional pressure reducing valve 15 and a second reversing valve 16 are installed on the second branch of the second oil supply circuit. The return oil circuit is used for the return oil of each part (returning to the oil tank). One end of the return oil circuit is connected to the oil tank, and the other end is connected to the oil return ports of the third reversing valve 19, the fourth reversing valve 21, the first reversing valve 12, the second reversing valve 16, and the overflow port of the proportional pressure reducing valve 15.
[0035] In one embodiment, a pressure line filter 2 is installed on the first oil supply circuit to filter impurities in the oil outlet fluid and avoid the influence of impurities on the hydraulic motor 17. A return oil filter 7 is installed on the return oil circuit to filter impurities in the return oil fluid and keep the oil tank 3 clean.
[0036] In one embodiment, a pressure sensor 4 and a liquid level gauge 5 are arranged in the oil tank 3 to detect the oil level and oil pressure.
[0037] In one embodiment, a first pressure gauge is arranged on the first branch of the second oil supply circuit to detect the oil pressure on the first branch of the second oil supply circuit (the three first branches of the second oil supply circuit are in parallel, and the pressure of each part is the same). A second pressure gauge is installed at the oil outlet of the proportional pressure reducing valve 15 to detect the oil pressure on the second branch of the second oil supply circuit.
[0038] In one embodiment, the second reversing valve 16 is a three-position four-way electromagnetic reversing valve with an "O" type neutral position function, which is used to ensure that when the second reversing valve 16 is in the neutral position, the expansion oil cylinder can be locked. The third reversing valve 19, the fourth reversing valve 21, and the first reversing valve 12 can be locked by relying on the pilot-operated check valve, and a three-position four-way electromagnetic reversing valve with an "H" type neutral position function can be used.
[0039] In one embodiment, a third branch pipe is provided between the first oil supply circuit and the oil return circuit, and a second proportional pressure reducing valve is installed on the third branch pipe. The function of the second proportional pressure reducing valve is for overflow.
[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. Honing machine valve group, characterized in that, include: Fuel tank (3); A first oil supply circuit, the oil inlet of the first oil supply circuit being located inside the oil tank, an axial piston variable displacement pump group (1) of a distribution motor being installed on the first oil supply circuit, and the first oil supply circuit having a first branch and a second branch; The first branch of the first oil supply circuit is used to supply oil to the hydraulic motor (17), and the second branch of the first oil supply circuit is used to supply oil to the reciprocating cylinder (18). The first branch of the first oil supply circuit is equipped with a first logic valve (23), a third reversing valve (19), and a double hydraulically controlled one-way valve group (20). The double hydraulically controlled one-way valve group (20) includes: a first hydraulically controlled one-way valve group (20a) and a second hydraulically controlled one-way valve group (20b). The first hydraulically controlled one-way valve group (20a) is close to the hydraulic motor (17), and the second hydraulically controlled one-way valve group (20b) is close to the third reversing valve (19). The second branch of the first oil supply circuit is equipped with a second logic valve (24), a fourth reversing valve (21), and a second hydraulically controlled one-way valve (22). a first shuttle valve, a second shuttle valve, and a third shuttle valve, wherein the two oil circuits of the reciprocating cylinder (18) are connected to both ends of the first shuttle valve through a throttling pipe, the oil outlet of the first shuttle valve is connected to the control port of the first logic valve (23), the two oil circuits of the reciprocating cylinder (18) are connected to both ends of the second shuttle valve through a throttling pipe, the oil outlet of the second shuttle valve is connected to the control port of the second logic valve (24), the control port of the first logic valve (23) and the control port of the second logic valve (24) are connected to both ends of the third shuttle valve, and the oil outlet of the third shuttle valve is connected to an oil tank; A second oil supply circuit, the oil inlet of the second oil supply circuit being located inside the oil tank, a motor pump group (6) being installed on the second oil supply circuit, and the second oil supply circuit having three first branches and one second branch; The three first branches of the second oil supply circuit are used to supply oil to the pressure plate cylinder (8), the translation cylinder (9) and the lifting cylinder (10) respectively; the second branch of the second oil supply circuit supplies oil to the expansion cylinder (11); the first branch of the second oil supply circuit is equipped with a first reversing valve (12), a first hydraulically controlled non-return valve (13) and a superimposed hydraulically controlled non-return valve (14); the second branch of the second oil supply circuit is equipped with a proportional pressure reducing valve (15) and a second reversing valve (16); An oil return circuit, one end of which is connected to the oil tank, and the other end of which is connected to the oil return ports of the third reversing valve (19), the fourth reversing valve (21), the first reversing valve (12), the second reversing valve (16), and the overflow port of the proportional pressure reducing valve (15).
2. The honing machine valve assembly according to claim 1, characterized in that: A pressure line filter (2) is installed on the first oil supply line.
3. The honing machine valve assembly according to claim 1, characterized in that: An oil return filter (7) is installed on the oil return line.
4. The honing machine valve assembly according to claim 1, characterized in that: A pressure sensor (4) and a liquid level meter (5) are arranged in the oil tank (3).
5. The honing machine valve assembly according to claim 1, characterized in that: A first pressure gauge is provided on the first branch of the second oil supply circuit, and a second pressure gauge is installed at the oil outlet of the proportional pressure reducing valve (15).
6. The honing machine valve assembly according to claim 1, characterized in that: The second reversing valve (16) is an "O" type three-position four-way electromagnetic reversing valve with a mid-position function.
7. The honing machine valve assembly according to claim 1, characterized in that: A third branch pipe is provided between the first oil supply circuit and the oil return circuit, and a second proportional pressure reducing valve is installed on the third branch pipe.