Cross induction power unauthorized control series plunger pump

Abstract

The utility model provides a cross induction power unauthorized control series plunger pump, which relates to the technical field of series pumps and comprises a control valve, a cross induction power unauthorized control valve is arranged on one side, far away from an ejector pin, of a power valve core in the control valve, and the cross induction power unauthorized control valve comprises a cross induction valve core. The cross induction valve element is coaxially connected with the power valve element, an elastic support is arranged at the end, away from the power valve element, of the cross induction valve element, and an oil way connector is arranged on one side of the cross induction valve element. The cross induction valve element is formed by coaxially connecting two sections of columnar structures with different diameters, the two sections of columnar structures with different diameters form a step surface on the surface of the cross induction valve element, an oil return passage is arranged on the axis of the cross induction valve element, and a pressure equalizing groove is formed in the surface surrounding the cross induction valve element. According to the series pump with the cross induction power unauthorized control valve, the total driving power can be fully utilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to series pump technical field, especially a cross induction power overreach control series plunger pump. BACKGROUND

[0002] The series pump in prior art is divided into split power control series pump and full power control series pump, the split power control series pump is as shown in the figure, that is, two hydraulic pumps each have an independent power valve, and the flow of each hydraulic pump is only affected by the load pressure of the circuit where the hydraulic pump is located. Figure 1 The split power system only simply combines two constant power hydraulic pumps, and the power of each pump is set to be at most 50% of the driving power.

[0003] The full power control series pump, that is, the flow of two pumps is affected by the outlet pressure of two pumps, the power of each pump can be set to be 100% of the total driving power, and the total driving power can be distributed between two systems according to requirements.

[0004] Therefore, there is an urgent need for a series pump that can fully utilize the total driving power and meet different flow requirements of different actuators. SUMMARY

[0005] The utility model provides a cross induction power overreach control series plunger pump, aims at solving the problem that the split power control series pump cannot fully utilize the total driving power, and simultaneously solving the problem that the output flow of two pumps of the existing full power control pump is kept consistent at all times, which is not conducive to meeting the different working condition requirements of different actuators.

[0006] The utility model provides the following technical scheme to achieve the above-mentioned purpose:

[0007] The application discloses a cross-inductive power override control series plunger pump, which comprises a control valve, a power valve core in the control valve is provided with a cross-inductive power override control valve on the side away from a plunger, the cross-inductive power override control valve comprises a cross-inductive valve core, the cross-inductive valve core is coaxially connected with the power valve core, an elastic support is arranged on the end of the cross-inductive valve core away from the power valve core, and an oil passage interface is formed on the side of the cross-inductive valve core and in the control valve shell; the cross-inductive valve core is formed by coaxially connecting two columnar structures with different diameters, the two columnar structures with different diameters form a stepped surface on the surface of the cross-inductive valve core, an oil return passage is arranged on the axis of the cross-inductive valve core, and an equalizing groove is arranged around the surface of the cross-inductive valve core.

[0008] Further, the elastic support comprises a screw sleeve, a first spring seat A is arranged in the screw sleeve, a first spring is sleeved on the first spring seat A, a first spring seat B is sleeved on the other end of the first spring, and the first spring seat B is connected with the cross-inductive valve core.

[0009] Further, another elastic support is arranged on the connecting end of the cross-inductive valve core and the power valve core, the elastic support comprises a second spring seat A arranged on the cross-inductive valve core, a second spring is sleeved on the second spring seat A, a second spring seat B is sleeved on the other end of the second spring, and the second spring seat B is connected with the power valve core.

[0010] Compared with the prior art, the application has the following beneficial effects:

[0011] 1. The series pump with the cross-inductive power override control valve can realize cross-inductive power override control by being threadedly connected on the original control valve of the pump without changing the original control valve structure of the pump.

[0012] 2. The series pump with the cross-inductive power override control valve can have different pump displacements, thereby meeting the different working conditions of different flow requirements of the actuating mechanism.

[0013] 3. The power of the two pumps of the series pump with the cross-inductive power override control valve changes with the power change of the other pump, when the power of one pump is 0, the power of the other pump is equal to the total driving power, and the total driving power can be fully utilized when the two pumps are running; compared with the prior art, the utilization rate of the total driving power is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a power distribution control series pump principle in the prior art;

[0015] Figure 2 It is a structure sectional view schematic diagram of the application;

[0016] Figure 3The cross induction valve is a schematic diagram of the utility model.

[0017] Figure 4 The utility model discloses a schematic diagram of principle.

[0018] Reference Signs: 1 - screw sleeve;2 - first spring seat A;3 - first spring;4 - first spring seat B;5 - valve body;6 - cross induction valve core;7 - second spring seat A;8 - second spring;9 - second spring seat B;10 - power valve core;11 - thimble;12 - L type shift block;13 - third spring seat A;14 - control valve housing;15 - third spring;16 - third spring seat B;17 - lock nut;18 - adjusting screw;19 - shaft pin;20 - step surface;21 - pressure equalizing groove;22 - oil return passage. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the application are shown; however, the present application can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided for the purpose of making the disclosure of the present application more thorough and comprehensive.

[0020] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiment.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] Embodiment. A cross induction power override control tandem plunger pump, structure reference Figure 2 and 3, including a control valve, the power spool 10 in the control valve is provided with a cross induction power override control valve away from the side of the needle 11, the cross induction power override control valve includes a cross induction spool 6, the cross induction spool 6 is coaxially connected with the power spool 10, the cross induction spool 6 is provided with a resilient support away from the power spool 10, the cross induction spool 6 is provided with an oil passage interface on one side and on the control valve housing 14, the oil passage interface is connected with the outlet oil pressure of another plunger pump through Y port; The cross induction spool 6 includes two coaxially connected columnar structures with different diameters, the two columnar structures with different diameters form a step surface 20 on the surface of the cross induction spool 6, the cross induction spool 6 is provided with a return oil passage 22 on the axis, and the surface of the cross induction spool 6 is provided with an equalizing groove 21. The screw sleeve 1 is connected with the valve body 5 through threads, so that the spring 3 maintains a certain precompression force and acts on the cross induction spool 6, so that the cross induction spool 6 is attached to the spring seat 7. The cross induction spool 6 is provided with a step surface 20, the outlet oil pressure of another pump acts on the step surface 20 through the external oil passage through the Y port, and drives the cross induction spool 6 to move. The cross induction spool 6 is provided with an equalizing groove 21 to prevent the cross induction spool 6 from being clamped and eccentrically worn. The cross induction spool 6 is provided with an oil passage hole, so that the oil in the screw sleeve 1 can be discharged to the control valve housing 14.

[0023] The resilient support includes a screw sleeve 1, the screw sleeve 1 is provided with a first spring seat A2, the first spring seat A2 is sleeved with a first spring 3, the other end of the first spring 3 is sleeved with a first spring seat B4, and the first spring seat B4 is connected with the cross induction spool 6.

[0024] The connecting end of the cross induction spool 6 and the power spool 10 is provided with another resilient support, and the resilient support includes a second spring seat A7 arranged on the cross induction spool 6, the second spring seat A7 is sleeved with a second spring 8, the other end of the second spring 8 is sleeved with a second spring seat B9, and the second spring seat B9 is connected with the power spool 10.

[0025] The use method and working principle of the application are as follows: Figure 4 As shown in the figure, the output flow of each hydraulic pump is not only related to the outlet pressure of itself, but also affected by the outlet pressure of another hydraulic pump. When the series pump works, the outlet oil pressure P1, P2 is transmitted to the small variable cavity through the throttle hole, the small variable piston is driven to move, the pump is in large displacement, and the outlet oil pressure of each pump also acts on the power valve of another pump through the cross induction device, so that the power setting of another pump is reduced.

[0026] The cross-induction power overriding control series pump provided by the application can set the power of each pump to 100% of the total driving power pmax.If pump 1 does not work, the outlet oil pressure P1 approaches 0, the pressure of the Y port of pump 2 approaches 0, the maximum allowable output power of pump 2 approaches 100% of the power setting pmax, and the available driving power approaches 100% of the total driving power.When the outlet pressure P1 of pump 1 rises, the pressure of the Y port of pump 2 increases, the power setting of pump 2 is overridden, the maximum allowable output power of pump 2 decreases, and is less than the original power setting pmax.The outlet pressures of the two pumps can change the power setting of each other through the cross-induction device, the ability of the hydraulic pump output can be adjusted according to the load size of each hydraulic pump, and the total driving power can be fully utilized.

[0027] Obviously, the above only describes some embodiments of the present application, but not all embodiments. The above embodiments are not intended to limit the present application, and the present application can have various changes and variations for those skilled in the art. Any combination, modification, equivalent replacement, improvement and other embodiments made by those skilled in the art within the spirit and principle of the present application shall be within the protection scope of the present application.

Claims

1. A cross-induction power override control in-line piston pump comprising a control valve, characterized by: The power spool (10) in the control valve is provided with a cross-induction power override control valve on the side away from the ejector pin (11), the cross-induction power override control valve comprises a cross-induction spool (6), the cross-induction spool (6) is coaxially connected with the power spool (10), an elastic support is arranged on the end of the cross-induction spool (6) away from the power spool (10), an oil port Y port is formed on the side of the cross-induction spool (6) and on the control valve housing (14); the cross-induction spool (6) comprises two sections of cylindrical structures with different diameters which are coaxially connected, the two sections of cylindrical structures with different diameters form a stepped surface (20) on the surface of the cross-induction spool (6), an oil return passage (22) is arranged on the axis of the cross-induction spool (6), and an equalizing groove (21) is arranged around the surface of the cross-induction spool (6).

2. The cross-induction power override control in-line piston pump of claim 1, wherein: The elastic support comprises a threaded sleeve (1), a first spring seat A (2) is arranged in the threaded sleeve (1), a first spring (3) is sleeved on the first spring seat A (2), a first spring seat B (4) is sleeved on the other end of the first spring (3), and the first spring seat B (4) is connected with the cross-induction spool (6).

3. The cross-induction power override control in-line piston pump of claim 1, wherein: Another elastic support is arranged on the connecting end of the cross-induction spool (6) and the power spool (10), the elastic support comprises a second spring seat A (7) arranged on the cross-induction spool (6), a second spring (8) is sleeved on the second spring seat A (7), a second spring seat B (9) is sleeved on the other end of the second spring (8), and the second spring seat B (9) is connected with the power spool (10).

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