Plunger pump

Abstract

The utility model discloses a plunger pump which comprises a base. The support is installed on the base, a speed reduction assembly is arranged on the support and comprises a first speed reduction part, a second speed reduction part and a third speed reduction part, and the second speed reduction part is connected with the first speed reduction part and the third speed reduction part in an engaged mode; one end of the swash plate is connected with the third speed reducing part, and the other end of the swash plate is connected with a cylinder body through a plunger; and the driving part is also mounted on the bracket and is connected with the second speed reducing part. The first speed reduction part, the second speed reduction part and the third speed reduction part are installed on the support, the driving part can enable the third speed reduction part to decelerate and drive the plunger to reciprocate in the cylinder body in the process of driving the second speed reduction part, and compared with planetary gear speed reduction, the structure is simple, and maintenance is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of plunger pumps, and in particular relates to a plunger pump. Background Art

[0002] The plunger pump is an important working part in hydraulic and pneumatic transmission. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve the suction and extrusion of liquid. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. It is widely used in high pressure, large flow and flow regulation occasions.

[0003] The plunger pump relies on the power source to drive the swash plate to rotate. The swash plate is connected to a plunger, which makes the plunger reciprocate along the axial direction during the rotation process. At the same time, the volume of the cavity formed by the plunger and the cylinder body will change back and forth. When the volume of the cavity increases, the pressure in the cavity will be less than the external pressure, so that the external fluid is pressed into the cavity. Conversely, when the volume of the cavity decreases, the cavity pressure will be greater than the external pressure, so that the fluid is pressurized and discharged from the cavity, thereby increasing the pressure of the discharged fluid and achieving the purpose of pressurization.

[0004] Traditional plunger pumps use a power source to provide rotational power, which generally has a relatively high speed, which is not suitable for the operation of plunger pumps, because too high a speed will increase wear, increase noise, and greatly reduce the overall efficiency. Therefore, it is generally necessary to use a reduction gearbox to reduce the speed of the power source so that the speed input to the plunger pump reaches a more appropriate speed, thereby driving the pump body to work. At present, the reduction gearboxes used are all planetary gear reduction gearboxes. This type of transmission is relatively small, complex in structure, high in cost, difficult to maintain, and requires a low speed power source with a large size. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art and provides a plunger pump.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plunger pump, comprising:

[0008] A bracket, on which a deceleration assembly is provided, wherein the deceleration assembly comprises a first deceleration member, a second deceleration member and a third deceleration member, wherein the second deceleration member is meshedly connected with the first deceleration member and the third deceleration member respectively;

[0009] A tilting plate, one end of which is connected to the third speed reducer, and the other end of which is connected to the cylinder body through a plunger;

[0010] The driving member is also installed on the bracket and connected with the second speed reducing member.

[0011] Furthermore, the bracket includes a first bracket and a second bracket, and the first bracket and the second bracket are spaced apart from each other;

[0012] The driving member is mounted on the first bracket, and the driving end thereof extends to a side of the second bracket away from the first bracket and is fixedly connected to the second speed reducing member;

[0013] The first deceleration member is arranged on a side of the second bracket away from the first bracket and meshes with a side of the second deceleration member;

[0014] The slant plate is meshed with the other side of the second speed reduction member through the third speed reduction member.

[0015] Furthermore, the first reduction member is a fixed face gear.

[0016] Furthermore, the second reduction member is a planetary gear.

[0017] Furthermore, the third reduction member is a rotating face gear.

[0018] Furthermore, the first bracket and the second bracket are both L-shaped structures.

[0019] Furthermore, the tilting plate is provided with an outer ball joint, the plunger is provided with an inner ball joint, and the outer ball joint cooperates with the inner ball joint.

[0020] Furthermore, the driving member is an electric motor or an internal combustion engine.

[0021] Furthermore, the cylinder body comprises a cylinder sleeve and a rotor, wherein the rotor is installed in the cylinder sleeve, a through hole is provided on the rotor, and an end of the plunger is movably connected in the through hole.

[0022] Furthermore, the through holes are evenly arranged.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. By installing the first reduction member, the second reduction member and the third reduction member on the bracket, the driving member can make the third reduction member drive the plunger to reciprocate in the cylinder body while reducing speed during the process of driving the second reduction member. Compared with the planetary gear reduction, the structure is simple and easy to maintain.

[0025] 2. By spacing the first bracket and the second bracket, a stable support is provided for the entire driving and deceleration system, reducing the risk of performance degradation or damage caused by vibration or shaking.

[0026] 3. The reduction assembly is a nutating face gear pair. The nutating face gear pair has a large reduction ratio, which can reduce the torque demand of the driving parts. At the same time, the nutating face gear pair has a high load-bearing capacity, which increases the service life of the overall structure and reduces the number of maintenance times. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A three-dimensional schematic diagram of a plunger pump provided by the utility model;

[0029] Figure 2 A side view of the plunger pump provided by the utility model;

[0030] Figure 3 A schematic diagram of the connection between the driving member and the planetary gear in the plunger pump provided by the utility model;

[0031] Figure 4 This is a schematic diagram of the installation of the fixed face gear in the plunger pump provided by the utility model;

[0032] Figure 5 This is a schematic diagram of the connection between the inclined plate and the rotating face gear in the plunger pump provided by the utility model;

[0033] Figure 6 A schematic diagram of the cylinder structure of the plunger pump provided by the utility model;

[0034] Figure 7 A schematic diagram of the structure of a cylinder sleeve in a plunger pump provided by the utility model;

[0035] Among them: 1. driving member; 2. reduction assembly; 201. first reduction member; 202. second reduction member; 203. third reduction member; 3. tilting plate; 4. plunger; 5. cylinder body; 6. first bracket; 7. second bracket; 8. base. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, it is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The present embodiment is described in detail below with reference to the accompanying drawings.

[0043] Embodiment 1:

[0044] This embodiment provides a plunger pump, including a base 8; a bracket, mounted on the base 8, on which a reduction assembly 2 is provided, the reduction assembly 2 including a first reduction member 201, a second reduction member 202 and a third reduction member 203, the second reduction member 202 is meshedly connected with the first reduction member 201 and the third reduction member 203 respectively; a swash plate 3, one end of which is connected with the third reduction member 203, and the other end is connected with the cylinder body 5 through the plunger 4; a driving member 1, also mounted on the bracket, and connected with the second reduction member 202. Figure 1 and Figure 2 As shown, the bracket includes a first bracket 6 and a second bracket 7, both of which are L-shaped structures. The first bracket 6 and the second bracket 7 are spaced apart at one end of the base 8, and the cylinder body 5 is arranged at the other end of the base 8, wherein the driving member 1 is installed on the longer end of the first bracket 6, and the first reduction member 201 is installed on the side of the second bracket 7 close to the cylinder body 5. The driving end of the driving member 1 extends to the side of the second bracket 7 away from the first bracket 6, and is fixedly connected with the second reduction member 202. The first reduction member 201 is meshed with one side of the second reduction member 202; the inclined plate 3 is meshed with the other side of the second reduction member 202 through the third reduction member 203. In the process of the driving member 1 driving the second reduction member 202 to rotate, the first reduction member 201 and the third reduction member 203 can reduce the rotation speed.

[0045] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the reduction assembly 2 is a nutating face gear pair, the first reduction member 201 is preferably a fixed face gear, the second reduction member 202 is preferably a planetary face gear, and the third reduction member 203 is a rotating face gear; an outer ball joint is provided on the swash plate 3, and an inner ball joint is provided on the plunger 4, and the outer ball joint cooperates with the inner ball joint. Figure 6 and Figure 7As shown, the cylinder body 5 includes a cylinder sleeve 501 and a rotor 502 . The rotor 502 is installed in the cylinder sleeve 501 . A through hole is opened on the rotor 502 . The end of the plunger 4 is movably connected to the through hole, and the through holes are evenly arranged on the rotor 502 . The cylinder sleeve 501 is provided with a fluid inlet and a fluid outlet. The inside of the cylinder sleeve 501 is separated by a partition. When the driving member 1 drives the reduction assembly 2 to rotate, the reduction assembly 2 (that is, the nutating surface gear pair) is fully decelerated to increase its torque. The reduction assembly 2 drives the swash plate 3 to rotate. During the rotation of the swash plate 3, the ball joint drives multiple plungers 4 to rotate simultaneously. The plungers 4 drive the rotor 502 to rotate in the cylinder sleeve. At the same time, because the swash plate 3 has an inclined surface, the ball joint drives the plunger 4 to reciprocate along the axial direction of the through hole on the rotor 502 during the rotation of the swash plate 3. When the plunger 4 reciprocates along its axial direction inside the through hole, a cavity is formed between the plunger 4 and the through hole, and the volume of the cavity changes. When the volume of the cavity changes from small to large, the cavity will generate negative pressure, sucking the fluid from the fluid inlet. On the contrary, when the volume of the cavity changes from large to small, the cavity pressure increases, and the fluid is pressed out from the inside of the cavity. With such reciprocating motion, the fluid can be continuously sucked in from the inlet and pressed out after the pressure increases.

[0046] In this embodiment, the driving member 1 is preferably a motor.

[0047] Embodiment 2:

[0048] The difference from the first embodiment is that the driving member 1 in this embodiment is preferably an internal combustion engine, and the other parts are consistent with the embodiment.

[0049] In summary, in both embodiments, a nutating surface gear pair is used for speed reduction, the speed reduction ratio is large, and the torque increasing effect is obvious, so the torque requirement for the driving member 1 can be reduced and the rotation speed of the driving member 1 can be increased. In this way, the volume and performance requirements of the driving member 1 can be greatly reduced.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plunger pump, characterized in that: include: A bracket, on which a deceleration assembly (2) is provided, wherein the deceleration assembly (2) comprises a first deceleration member (201), a second deceleration member (202) and a third deceleration member (203), wherein the second deceleration member (202) is meshedly connected with the first deceleration member (201) and the third deceleration member (203); A tilting plate (3), one end of which is connected to the third speed reducer (203), and the other end of which is connected to the cylinder body (5) via a plunger (4); The driving member (1) is also mounted on the bracket and connected to the second speed reducing member (202).

2. The plunger pump according to claim 1, characterized in that: The bracket comprises a first bracket (6) and a second bracket (7), and the first bracket (6) and the second bracket (7) are arranged with an interval therebetween; The driving member (1) is mounted on the first bracket (6), and its driving end extends to a side of the second bracket (7) away from the first bracket (6) and is fixedly connected to the second speed reducing member (202); The first deceleration member (201) is arranged on a side of the second bracket (7) away from the first bracket (6) and meshes with a side of the second deceleration member (202); The inclined plate (3) is meshed with the other side of the second speed reducer (202) via a third speed reducer (203).

3. The plunger pump according to claim 1 or 2, characterized in that: The first speed reducing member (201) is a fixed face gear.

4. The plunger pump according to claim 1 or 2, characterized in that: The second reduction member (202) is a planetary gear.

5. The plunger pump according to claim 1 or 2, characterized in that: The third speed reducing member (203) is a rotating face gear.

6. The plunger pump according to claim 2, characterized in that: The first bracket (6) and the second bracket (7) are both L-shaped structures.

7. The plunger pump according to claim 1, characterized in that: The tilting plate (3) is provided with an outer ball joint, and the plunger (4) is provided with an inner ball joint, and the outer ball joint cooperates with the inner ball joint.

8. The plunger pump according to claim 1, characterized in that The driving member (1) is an electric motor or an internal combustion engine.

9. The plunger pump according to claim 1, characterized in that: The cylinder body (5) comprises a cylinder sleeve (501) and a rotor (502). The rotor (502) is installed in the cylinder sleeve (501). A through hole is provided on the rotor (502), and the end of the plunger (4) is movably connected to the through hole.

10. The plunger pump according to claim 9, characterized in that The through holes are evenly arranged.

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