Anti-reverse valve group, control method thereof and anti-reverse oil supply system

Abstract

The invention discloses an anti-reverse-rotation valve group and a control method thereof and an anti-reverse-rotation oil supply system, the anti-reverse-rotation valve group comprises a plurality of oil supply pipelines, one end of each oil supply pipeline is communicated with an oil supply source, the other end of each oil supply pipeline is communicated with an oil pump, and each oil supply pipeline is provided with a branch pipeline communicated to a terminal oil supply port. And the one-way valves are arranged on the pipeline for connecting each oil supply pipeline with the oil pump and the pipeline for connecting the branch pipeline with the terminal oil supply port. The multiple one-way valves are combined and connected, normal and stable oil suction and oil supply can be achieved whether the oil pump rotates forwards or reversely, and a series of problems caused by reverse rotation of the oil pump are solved essentially.

Description

Technical Field

[0001] The invention belongs to the field of sealing oil systems, and in particular relates to an anti-reversal valve group and a control method thereof, and an anti-reversal oil supply system. Background Art

[0002] In the lubricating oil or sealing oil system, the oil supply mainly depends on the oil pump. In some cases, the oil pump may reverse, which will cause the oil pump to be unable to supply oil to the downstream normally, causing the lubrication and sealing of the downstream oil-using equipment to fail, thereby causing equipment damage.

[0003] To solve the above problems, the existing solutions mainly avoid oil pump reversal by strictly regulating the operating procedures and improving the oil pump drive end. However, it is not completely reliable to prohibit oil pump reversal from the operating procedures and rely on operators. By improving the oil pump drive end to avoid oil pump reversal as much as possible, the oil pump reversal problem in most cases can be avoided. However, in some unexpected situations, this method still has the probability of reversal, and it cannot completely avoid this problem. In addition, the improvement principle of the drive end is complicated and the cost is relatively high. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an anti-reverse valve group and its control method and an anti-reverse oil supply system. By setting a plurality of one-way valve combination connections, the oil pump can normally and stably absorb and supply oil regardless of forward or reverse rotation, thereby essentially solving a series of problems caused by the reversal of the oil pump.

[0005] The object of the present invention is achieved through the following technical solution: an anti-reversal valve group, comprising:

[0006] Multiple oil supply pipelines, one end of each oil supply pipeline is connected to the oil supply source, and the other end is connected to the oil pump. A branch pipeline is arranged on each oil supply pipeline to be connected to the terminal oil supply port.

[0007] The one-way valve is arranged on the pipeline connecting each oil supply pipeline with the oil pump and the pipeline connecting the branch pipeline with the terminal oil supply port.

[0008] Preferably, the number of oil supply pipelines is an even number and they are symmetrically arranged.

[0009] Preferably, the plurality of oil supply pipelines can be connected to the oil supply source separately, or can share a pipeline to be connected to the oil supply source.

[0010] Preferably, the one-way valves inside the plurality of oil supply pipelines may be provided in an integrated form within the valve block.

[0011] Preferably, when the one-way valve is provided in an integrated form in the valve block, the passage between the valves is realized by drilling holes in the valve block, and the interface form is not limited.

[0012] Preferably, the anti-reversal valve group can be arranged in a parallel dual pump system, and each system is provided with a set of reversal valve groups.

[0013] Preferably, the one-way valve on the pipeline connecting the oil supply pipeline and the terminal oil supply port is provided with a bypass orifice plate.

[0014] Preferably, the oil supply source is a fuel tank.

[0015] In addition to providing an anti-reversal valve group, the present invention further provides a control method for the anti-reversal valve group, comprising the following steps:

[0016] When the oil pump is running, open the one-way valve between any one oil supply pipeline and the oil pump, and check-close the one-way valve between the oil supply pipeline and the terminal oil supply port, and at the same time open the one-way valve between the second oil supply pipeline and the terminal oil supply port, check-close the one-way valve between the oil supply pipeline and the oil pump, and close the valves in the remaining oil supply pipelines;

[0017] With the first oil supply pipeline as the oil inlet side and the second oil supply pipeline as the oil supply side, the oil pump sucks oil from the oil suction port of the first oil supply pipeline and supplies the sucked oil to the terminal oil supply port through the second oil supply pipeline;

[0018] When the oil pump reverses, the check valve between the first oil supply pipeline and the oil pump is closed, the check valve between the oil supply pipeline and the terminal oil supply port is opened, the check valve between the second oil supply pipeline and the oil pump is opened, the check valve between the oil supply pipeline and the terminal oil supply port is closed, and the valves in the remaining oil supply pipelines are closed;

[0019] With the second oil supply pipeline as the oil inlet side and the first oil supply pipeline as the oil supply side, the oil pump sucks oil from the oil suction port of the second oil supply pipeline and supplies the sucked oil to the terminal oil supply port through the first oil supply pipeline.

[0020] The present invention also provides an anti-reversal oil supply system, in which the anti-reversal valve group is provided to prevent the oil pump from reversing when the oil supply system is running.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The present invention provides an anti-reversal valve group and its control method and anti-reversal oil supply system, which can realize normal and stable oil suction and oil supply of the oil pump regardless of forward and reverse rotation through the clever combination connection of the one-way valve, and essentially solves a series of problems caused by the possible reversal of the oil pump. By setting the orifice plate structure, the standby oil pump can complete the filling of the inlet / outlet oil pipes before starting. Once it needs to be started, it can be put into use in the shortest time and run stably, which is also beneficial to extend the life of the oil pump. The anti-reversal valve group of the present invention is not limited to application in oil pumps and oil systems, but can also be other liquid pumps and liquid systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the principle of the anti-reversal valve group in an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the principle of the anti-reversal valve group combined with the oil suction port in an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the principle of an anti-reversal valve group with an orifice plate in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] The technical solution of the present invention provides an anti-reversal valve group, comprising:

[0028] Multiple oil supply pipelines, one end of each oil supply pipeline is connected to the oil supply source, and the other end is connected to the oil pump. A branch pipeline is arranged on each oil supply pipeline to be connected to the terminal oil supply port.

[0029] The one-way valve is arranged on the pipeline connecting each oil supply pipeline with the oil pump and the pipeline connecting the branch pipeline with the terminal oil supply port.

[0030] like Figure 1 As shown, in one embodiment of the present invention, the number of oil supply pipelines is 2, which are symmetrically arranged.

[0031] like Figure 2 As shown, in one embodiment of the present invention, Figure 1 The A1 and B1 ports are combined in the valve group so that the valve group has only one AB oil suction port. At this time, multiple oil supply pipelines share one pipeline to connect to the oil supply source.

[0032] In one embodiment of the present invention, the one-way valves inside multiple oil supply pipelines can be integrated in the valve block, and the passages between the valves are connected by drilling holes in the valve block. The interface is not limited in form and can be various threaded interfaces, flange interfaces, etc.

[0033] like Figure 3As shown, in one embodiment of the present invention, the anti-reversal valve group can be arranged in a parallel dual pump system, and each system is provided with a set of reversal valve groups. At this time, the one-way valve on the pipeline connecting the oil supply pipeline and the terminal oil supply port is provided with a bypass orifice plate. In this embodiment, in a dual pump system with one for use and one for backup, two oil pumps are connected in parallel to supply oil. When one oil pump is started first and supplies oil normally, when there is no bypass orifice plate, the pressure oil will not flow back to the C port of the other oil pump. However, after the bypass orifice plate is added, a trace amount of pressure oil is allowed to slowly flow back from the C port, passing through the two orifices to the inlet / outlet oil pipes of the oil pump. The one-way valves V1 and V2 are closed, and the refluxed oil can only accumulate in the inlet / outlet oil pipes of the backup oil pump. As time accumulates, the inlet / outlet oil pipes of the backup oil pump are eventually filled with oil. When the running oil pump fails or there are other abnormalities in the oil system that require the standby oil pump to start, the standby oil pump can directly suck and supply oil and can be put into normal use in a very short time. This avoids the situation where the standby oil pump has to pump out the air in the oil suction pipe before it can suck in oil for normal operation after starting. Firstly, sucking in air affects the life of the oil pump, and secondly, sucking in air reduces the speed at which the oil pump is put into use.

[0034] In one embodiment of the present invention, the oil supply source is generally an oil tank.

[0035] In addition to providing an anti-reversal valve group, the technical solution of the present invention further provides a control method of the anti-reversal valve group. Figure 1 For example, two oil supply lines are provided in the system. The two oil supply lines include four one-way valves (V1 / V2 / V3 / V4 in the figure). Figure 1 The anti-reversal valve group is connected as shown. The dotted box in the figure can be regarded as the boundary of the valve group. The valve group has 5 external interfaces:

[0036] A1 / B1: Oil suction port, usually connected to the oil tank;

[0037] A / B: Oil pump interface (A / B are not distinguished, just connect to the oil pump inlet / outlet respectively. When A is the oil suction port, B is the oil outlet, and vice versa);

[0038] C: terminal oil supply port, supplying downstream;

[0039] The control method of the above valve group is as follows:

[0040] When the oil pump rotates forward, port A is the oil inlet of the oil pump, and port B is the oil outlet of the oil pump. On the oil inlet side, the check valve V1 is open, the check valve V3 is check-closed, and the oil pump sucks oil from port AB. On the oil supply side, the check valve V2 is check-closed, the check valve V4 is open, and the oil supplied by the oil pump passes through the check valve V4 and stays at port C (the check valve V3 is check-closed). That is, when the oil pump rotates forward, the oil is sucked in from port AB and finally supplied from port C.

[0041] When the oil pump reverses, port B is the oil pump inlet, port A is the oil pump outlet, on the oil inlet side, the check valve V2 is open, the check valve V4 is check-closed, and the oil pump sucks oil from port AB; on the oil supply side, the check valve V1 is check-closed, the check valve V3 is open, and the oil supplied by the oil pump passes through the check valve V3 and stays at port C (the check valve V4 is check-closed). That is, when the oil pump reverses, the oil is sucked from port AB and finally supplied from port C.

[0042] In summary, by connecting the anti-reversal valve group to the oil pump system, it can be achieved that no matter the oil pump rotates forward or reversely, it can stably suck oil from port AB and supply oil from port C. The oil supply through the anti-reversal valve group is also unidirectional, that is, the oil at port C can only flow downstream, and the oil downstream cannot flow back because the one-way valves V3 and V4 are both in the non-return closed state at this time. When the system requires two pumps in parallel to supply oil, one for use and one for backup, a check valve is generally added to the outlet of each oil pump to ensure that when one of the oil pumps is running, the supplied oil will not flow back to the oil tank through the other oil pump. After adopting the anti-reversal valve group in this embodiment, it is no longer necessary to add a check valve to the outlet of each oil pump. In addition, when multiple oil supply pipelines are set in the system, it can be used as a backup to prevent the system from being unable to operate due to a failure in a certain oil supply pipeline.

[0043] The technical solution of the present invention also provides an anti-reverse oil supply system, in which the above-mentioned anti-reverse valve group is provided to prevent the oil pump from reversing when the oil supply system is running.

[0044] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An anti-reverse valve group, characterized in that: The valve group comprises: Multiple oil supply pipelines, one end of each oil supply pipeline is connected to the oil supply source, and the other end is connected to the oil pump, and each oil supply pipeline is provided with a branch pipeline connected to the terminal oil supply port; A one-way valve is arranged on each pipeline connecting the oil supply pipeline and the oil pump and on the pipeline connecting the branch pipeline and the terminal oil supply port.

2. The anti-reverse valve assembly according to claim 1, characterized in that: The oil supply pipelines are an even number and are symmetrically arranged.

3. The anti-reverse valve assembly according to claim 1, characterized in that: The multiple oil supply pipelines can be connected to the oil supply source separately, or share a pipeline to be connected to the oil supply source.

4. The anti-reverse valve assembly according to claim 1, characterized in that: The one-way valves inside the multiple oil supply pipelines may be arranged in an integrated manner within the valve block.

5. The anti-reverse valve assembly according to claim 4, characterized in that: When the one-way valve is arranged in an integrated form in the valve block, the passage between the valves is realized by drilling holes in the valve block, and the interface form is not limited.

6. The anti-reverse valve assembly according to claim 1, characterized in that: The anti-reversal valve group can be arranged in a parallel dual pump system, and each system is provided with a set of reversal valve groups.

7. An anti-reverse valve assembly as claimed in claim 6, characterized in that: The one-way valve on the pipeline connecting the oil supply pipeline and the terminal oil supply port is provided with a bypass orifice plate.

8. The anti-reverse valve assembly according to claim 1, characterized in that: The oil supply source is an oil tank.

9. A control method for an anti-reverse valve group, characterized in that: The method is used to control the anti-reverse valve group according to any one of claims 1 to 8, and the control method comprises the following steps: When the oil pump is running, open the one-way valve between any one oil supply pipeline and the oil pump, and check-close the one-way valve between the oil supply pipeline and the terminal oil supply port, and at the same time open the one-way valve between the second oil supply pipeline and the terminal oil supply port, check-close the one-way valve between the oil supply pipeline and the oil pump, and close the valves in the remaining oil supply pipelines; With the first oil supply pipeline as the oil inlet side and the second oil supply pipeline as the oil supply side, the oil pump sucks oil from the oil suction port of the first oil supply pipeline and supplies the sucked oil to the terminal oil supply port through the second oil supply pipeline; When the oil pump reverses, the check valve between the first oil supply pipeline and the oil pump is closed, the check valve between the oil supply pipeline and the terminal oil supply port is opened, the check valve between the second oil supply pipeline and the oil pump is opened, the check valve between the oil supply pipeline and the terminal oil supply port is closed, and the valves in the remaining oil supply pipelines are closed; With the second oil supply pipeline as the oil inlet side and the first oil supply pipeline as the oil supply side, the oil pump sucks oil from the oil suction port of the second oil supply pipeline and supplies the sucked oil to the terminal oil supply port through the first oil supply pipeline. 10.An anti-reverse oil supply system, characterized in that: The system is provided with an anti-reverse valve group according to any one of claims 1 to 8, which is used to prevent the oil pump from reversing when the oil supply system is running.

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