Pressure-limited spring variable vane pump

Abstract

The utility model provides a kind of pressure-limited spring variable vane pump, including vane pump body (10), stator (20) and rotor (30), the rotor (30) has several vane slots (31), each the vane (40) is arranged in the vane slot (31), the vane (40) has at least one ladder through hole (41), spring (42) is arranged between the ladder through hole (41) and the groove bottom of the vane slot (31), and the upper end surface of the vane (40), lower end surface and the end surface of the vane (40) towards stator (20) are all provided with oil channel groove (43). The utility model is provided with spring between vane and vane slot groove bottom, and the upper end surface of vane, lower end surface and the end surface of vane towards stator are all provided with oil channel groove, so that the force of vane to stator is centrifugal force plus spring force whether in oil suction area or oil discharge area, and then vane can be smoothly thrown away under the working condition of high concentration medium and low speed, to ensure the normal work of vane pump.

Description

Technical Field

[0001] This utility model relates to the field of vane pump technology, and in particular to a pressure-limiting spring variable vane pump. Background Technology

[0002] As a positive displacement variable pump in hydraulic power components, the vane pump is widely used in engineering machinery, machine tool hydraulic systems, and automated production lines, where flow rate needs to be adaptively adjusted according to load pressure. Its working principle is to achieve dynamic flow rate control by changing the eccentricity between the stator and rotor. Specifically, the rotor uses centrifugal force to throw the vanes away; after the vanes contact the stator, they rotate with it, completing the volume change of the sealed area, thereby realizing the oil suction and discharge process.

[0003] Vane pumps primarily operate by using the centrifugal force of the rotor to sling the vanes apart. However, in high-concentration media environments, the vanes are difficult to sling apart due to the high viscosity of the medium, leading to pump start-up difficulties and low efficiency.

[0004] Therefore, existing technologies need to be improved and enhanced. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a pressure-limiting spring variable vane pump that can smoothly handle high-concentration media and low-speed conditions, thereby ensuring the normal operation of the vane pump.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A pressure-limiting spring variable vane pump includes a vane pump body, a stator with an empty space disposed within the vane pump body, and a rotor disposed eccentrically to the stator within the empty space. The rotor has a plurality of vane slots extending radially along the rotor, and each vane slot is provided with a vane. The vane reciprocates radially within the vane slot. Each vane has at least one stepped through hole, and a spring is disposed between the stepped through hole and the bottom of the vane slot. An oil passage groove is provided on the upper end face, the lower end face, and the end face of the vane facing the stator.

[0008] As a further embodiment of this utility model, it also includes a cover plate disposed on the vacant space and a chassis disposed under the vacant space, wherein the blade is sealed by contacting the cover plate through its upper end face and by contacting the chassis through its lower end face.

[0009] As a further embodiment of this utility model, the blade groove includes a straight groove and an arc-shaped groove that communicates with the straight groove.

[0010] As a further embodiment of this utility model, the bottom of the blade groove is provided with a blind groove, one end of the spring abuts against the bottom of the blind groove, and the other end abuts against the bottom end face of the large hole of the stepped through hole.

[0011] As a further embodiment of this invention, the cross-section of the oil passage groove is an inverted trapezoid.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Due to the above-mentioned structural design, namely, the vane pump body is equipped with a stator and a rotor, the rotor is equipped with vane slots, the vane slots are equipped with vanes, and a spring is installed between the vane and the bottom of the vane slot. Oil passage grooves are provided on the upper end face, lower end face, and end face of the vane facing the stator. This ensures that the force exerted by the vane on the stator by the vane in both the oil suction and discharge areas is centrifugal force plus spring force. As a result, the vane can be smoothly thrown off even under high-concentration media and low-speed conditions, thus ensuring the normal operation of the vane pump. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Appendix Figure 2 This is an exploded structural diagram of an embodiment of the present utility model;

[0016] Appendix Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0017] Appendix Figure 4 This is another cross-sectional view of an embodiment of the present utility model;

[0018] Appendix Figure 5 This is a schematic diagram of the rotor in an embodiment of the present invention.

[0019] The labels in the diagram are as follows:

[0020] 10-Vannel pump body, 20-Stator, 30-Rotor, 40-Vannel, 50-Cover plate, 60-Chassis;

[0021] 41-Stepped through hole, 42-Spring, 43-Oil passage groove;

[0022] 21 - Vacant space;

[0023] 31-blade groove;

[0024] 311-Straight groove, 312-Arc groove, 313-Blind groove. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings:

[0026] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0027] In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0029] like Figure 1-5As shown, this application discloses a pressure-limiting spring variable vane pump, comprising a vane pump body 10, a stator 20 having an empty space 21 disposed within the vane pump body 10, and a rotor 30 disposed within the empty space 21 and eccentrically positioned to the stator 20. The rotor 30 has a plurality of vane slots 31 extending radially along the rotor. Each vane slot 21 is provided with a vane 40, and the vane 40 reciprocates radially within the vane slot 21. Each vane 40 has two stepped through holes 41, and each stepped through hole 41 is connected to the vane slot 21. A spring 42 is provided between the bottom of each groove. An oil passage groove 43 is provided on the upper end face, lower end face, and end face of the blade facing the stator 20. The cross-section of the oil passage groove 43 is an inverted trapezoid. Through the above structural design, a spring is provided between the blade and the bottom of the blade groove, and an oil passage groove is provided on the upper end face, lower end face, and end face of the blade facing the stator. This ensures that the force exerted by the blade on the stator is centrifugal force plus spring force, whether the blade is in the oil suction area or the oil discharge area. This allows the blade to be smoothly thrown off under high concentration medium and low speed conditions, thereby ensuring the normal operation of the blade pump.

[0030] In operation, when the vane pump is running at low speed or in a high-concentration medium environment, the spring provides additional force to help the vanes break apart, working together with centrifugal force to overcome the resistance caused by the viscosity of the medium. Simultaneously, the spring's rebound characteristic reduces the contact pressure between the vanes and the stator, extending the service life of both the vanes and the stator, and improving the pump's ultimate pressure and operating efficiency.

[0031] Specifically, it also includes a cover plate 50 disposed on the vacant space 21 and a chassis 60 disposed under the vacant space 21, wherein the blade 40 is sealed by contacting the cover plate 50 through its upper end face and by contacting the chassis 60 through its lower end face.

[0032] Specifically, the blade groove 31 includes a straight groove 311 and an arc groove 312 connected to the straight groove 311. A blind groove 313 is provided at the bottom of the blade groove 31. One end of the spring 42 abuts against the bottom of the blind groove 313, and the other end abuts against the bottom end face of the large hole of the stepped through hole 41.

[0033] In summary, this utility model, through the above-described structural design, overcomes the shortcomings of the prior art and features a reasonable structure, easy start-up, and high efficiency.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A pressure-limiting spring variable vane pump, characterized in that: The pump includes a vane pump body (10), a stator (20) with an empty space (21) disposed in the vane pump body (10), and a rotor (30) disposed in the empty space (21) and eccentric to the stator (20). The rotor (30) has a plurality of vane slots (31) extending radially along the rotor. Each vane slot (31) is provided with a vane (40). The vane (40) reciprocates radially within the vane slot (31). The vane (40) has at least one stepped through hole (41). A spring (42) is disposed between the stepped through hole (41) and the bottom of the vane slot (31). An oil passage groove (43) is provided on the upper end face, the lower end face, and the end face of the vane (40) facing the stator (20).

2. The pressure-limiting spring variable vane pump according to claim 1, characterized in that: It also includes a cover plate (50) disposed on the vacant space (21) and a chassis (60) disposed under the vacant space (21), wherein the blade (40) is sealed by contacting the cover plate (50) through its upper end face and by contacting the chassis (60) through its lower end face.

3. The pressure-limiting spring variable vane pump according to claim 2, characterized in that: The blade groove (31) includes a straight groove (311) and an arc groove (312) connected to the straight groove (311).

4. The pressure-limiting spring variable vane pump according to claim 3, characterized in that: The blade groove (31) has a blind groove (313) at the bottom. One end of the spring (42) abuts against the bottom of the blind groove (313), and the other end abuts against the bottom end face of the large hole of the stepped through hole (41).

5. The pressure-limiting spring variable vane pump according to claim 4, characterized in that: The cross-section of the oil passage groove (43) is an inverted trapezoid.

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