阅读说明：本技术 一种动静态特征自反馈的柱塞泵斜盘组件及柱塞泵 (Plunger pump swash plate assembly with dynamic and static characteristics self-feedback function and plunger pump ) 是由 贾连辉 许顺海 任中永 王一博 洪昊岑 孙志洪 张奎 赵春晓 张斌 程国赞 龚国 于 2021-09-09 设计创作，主要内容包括：本发明提供了一种动静态特征自反馈的柱塞泵斜盘组件及柱塞泵,包括：斜盘；具有磁性的回程盘,与斜盘轴向相对；多个止推板,在回程盘的背对斜盘的一侧沿周向彼此间隔地设置,且与斜盘相对固定,以将回程盘的轴向位置限制在斜盘与止推板之间；第一线圈和第二线圈,分别设于止推板和斜盘的朝向回程盘的一侧,以向回程盘提供磁场。本发明通过设置具有磁性的回程盘,并设置线圈为回程盘提供磁场,提供了一种非接触式检测方案,实现柱塞泵在实际运行期间实时反馈回程盘的动静态特征,能反映柱塞泵的实际运行工况,有效解决了现有技术无法在柱塞泵运行过程中实时检测回程盘动静态特征的问题。(The invention provides a plunger pump swash plate assembly with self-feedback of dynamic and static characteristics and a plunger pump, comprising: a swash plate; a magnetic return plate axially opposite to the swash plate; a plurality of thrust plates which are arranged at intervals along the circumferential direction on one side of the return disc, which is opposite to the swash plate, and are fixed relative to the swash plate so as to limit the axial position of the return disc between the swash plate and the thrust plates; and the first coil and the second coil are respectively arranged on one sides of the thrust plate and the swash plate, which face the return disc, so as to provide a magnetic field for the return disc. The plunger pump is provided with the magnetic return disc, and the coil is arranged to provide a magnetic field for the return disc, so that a non-contact detection scheme is provided, the dynamic and static characteristics of the return disc are fed back in real time during the actual operation of the plunger pump, the actual operation condition of the plunger pump can be reflected, and the problem that the dynamic and static characteristics of the return disc cannot be detected in real time during the operation process of the plunger pump in the prior art is effectively solved.)

1. A plunger pump swash plate assembly with self-feedback of dynamic and static characteristics, comprising:

a swash plate;

a magnetic return plate axially opposite to the swash plate;

a plurality of thrust plates which are arranged at intervals along the circumferential direction on one side of the return disc, which is opposite to the swash plate, and are fixed relative to the swash plate so as to limit the axial position of the return disc between the swash plate and the thrust plates;

and the first coil and the second coil are respectively arranged on one sides of the thrust plate and the swash plate, which face the return disc, so as to provide a magnetic field for the return disc.

2. The plunger pump swash plate assembly as claimed in claim 1, wherein the return plate is provided with a plurality of through holes along a circumferential direction for the shoes to pass through, and a shielding plate for frictional contact with the shoes is fixed to a side of the swash plate facing the return plate.

3. The plunger pump swash plate assembly of claim 2 wherein the second coil is fixed to a surface of the shield plate facing the return plate.

4. The plunger pump swash plate assembly as claimed in claim 2, further comprising a plurality of connecting plates fixed to the shield plate, the plurality of connecting plates being disposed radially outward of the return plate and spaced apart from the return plate, the plurality of connecting plates being connected to the plurality of thrust plates, respectively.

5. The plunger pump swash plate assembly as in claim 2, wherein a plurality of the thrust plates are located outside a plurality of the perforations in a radial direction of the return plate.

6. The plunger pump swash plate assembly of claim 2 wherein the guard plate is a wear plate.

7. The plunger pump swash plate assembly of any of claims 1 to 6, wherein the return plate is made of a permanent magnetic material.

8. The plunger pump swash plate assembly as claimed in any one of claims 1 to 6, further comprising a Hall sensor for detecting the change in the magnetic field.

9. A plunger pump comprising the plunger pump swash plate assembly defined in any one of claims 1 to 8.

10. The plunger pump of claim 9, further comprising:

the sliding shoes are arranged at intervals along the circumferential direction of the return disc and respectively penetrate through the return disc along the axial direction;

a cylinder block provided with a shaft hole and a plurality of plunger holes arranged at intervals around the shaft hole, the central axis of the swash plate and the central axis of the return plate being inclined with respect to the central axis of the cylinder block;

the plungers are respectively connected with the sliding shoes and respectively penetrate through the plunger holes;

the main shaft penetrates through the swash plate, the return plate and the shaft hole, the main shaft can drive the cylinder body to rotate, and the cylinder body can drive the plurality of plungers, the plurality of sliding shoes and the return plate to rotate relative to the swash plate.

Technical Field

The invention relates to the technical field of plunger pumps, in particular to a plunger pump swash plate assembly with self-feedback of dynamic and static characteristics and a plunger pump.

Background

In the process of switching high pressure and low pressure of the axial plunger pump, the state of a return disc of the plunger pump changes, for example, vibration in the axial direction may occur, and if the vibration amplitude of the return disc is large (that is, the return disc shows an axial dynamic characteristic), the damage risk of a plunger shoe assembly is increased at this time; if the return disc vibrates in a small amplitude or does not vibrate (i.e. the return disc shows an axial static characteristic), the plunger pump is in a relatively stable working state.

In the prior art, the dynamic and static characteristics of the return disc are mainly tested under the laboratory condition, the dynamic and static characteristics of the return disc cannot be detected in real time in the running process of the plunger pump, and the real working condition is difficult to reflect.

Disclosure of Invention

The invention aims to provide a plunger pump swash plate assembly with self-feedback of dynamic and static characteristics and a plunger pump, and aims to solve the problem that the dynamic and static characteristics of a return disc cannot be detected in real time in the operation process of the plunger pump in the prior art.

In order to achieve the above object, the present invention provides a plunger pump swash plate assembly with self-feedback of dynamic and static characteristics, comprising: a swash plate; a magnetic return plate axially opposite to the swash plate; a plurality of thrust plates which are arranged at intervals along the circumferential direction on one side of the return disc, which is opposite to the swash plate, and are fixed relative to the swash plate so as to limit the axial position of the return disc between the swash plate and the thrust plates; and the first coil and the second coil are respectively arranged on one sides of the thrust plate and the swash plate, which face the return disc, so as to provide a magnetic field for the return disc.

The plunger pump swash plate assembly as described above, wherein the return plate is provided with a plurality of through holes along a circumferential direction through which the shoes pass, and a shielding plate for frictional contact with the shoes is fixed to a side of the swash plate facing the return plate.

The plunger pump swash plate assembly as described above, wherein the second coil is fixed on a surface of the shielding plate facing the return disc.

The swash plate assembly of the plunger pump comprises a plurality of connecting plates fixed on the protection plate, wherein the connecting plates are arranged on the radial outer side of the return plate and are spaced from the return plate, and the connecting plates are respectively connected with the thrust plates.

The plunger pump swash plate assembly as described above, wherein a plurality of the thrust plates are located outside a plurality of the penetration holes in a radial direction of the return disc.

The plunger pump swash plate assembly as described above, wherein the guard plate is a wear plate.

The plunger pump swash plate assembly as described above, wherein the material of the return plate is a permanent magnetic material.

The plunger pump swash plate assembly as described above, further comprising a hall sensor for detecting the change in the magnetic field.

The invention also provides a plunger pump which comprises the plunger pump swash plate assembly.

The plunger pump as described above, further comprising: the sliding shoes are arranged at intervals along the circumferential direction of the return disc and respectively penetrate through the return disc along the axial direction; a cylinder block provided with a shaft hole and a plurality of plunger holes arranged at intervals around the shaft hole, the central axis of the swash plate and the central axis of the return plate being inclined with respect to the central axis of the cylinder block; the plungers are respectively connected with the sliding shoes and respectively penetrate through the plunger holes; the main shaft penetrates through the swash plate, the return plate and the shaft hole, the main shaft can drive the cylinder body to rotate, and the cylinder body can drive the plurality of plungers, the plurality of sliding shoes and the return plate to rotate relative to the swash plate.

The plunger pump swash plate component with self-feedback of dynamic and static characteristics and the plunger pump have the characteristics and advantages that:

1. according to the plunger pump, the magnetic return disc is arranged, the coil is arranged to provide a magnetic field for the return disc, and the dynamic and static characteristics of the return disc are fed back in real time during the actual operation of the plunger pump, so that the actual operation working condition of the plunger pump is reflected, the structure is simple, a remarkable technical effect is achieved, and the problem that the dynamic and static characteristics of the return disc cannot be detected in real time during the operation process of the plunger pump in the prior art is effectively solved;

2. the invention provides a non-contact detection scheme, which can not influence the normal motion of a return disc, realizes the real-time collection of the dynamic and static characteristics of the return disc in the running process of a plunger pump and analyzes the vibration characteristics of a main pump rotor component; the actual operation condition of the plunger pump can be detected truly, accurately and in real time by integrating the detection part in the plunger pump;

3. according to the invention, the protection plate is arranged on the swash plate, so that the protection plate is in frictional contact with the slipper, the swash plate is not directly in frictional contact with the slipper, the swash plate is prevented from being worn, the swash plate is protected, when the protection plate is worn, only the protection plate needs to be replaced or maintained, and the maintenance and replacement cost is reduced.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic view of a plunger pump swash plate assembly with self-feedback of dynamic and static characteristics according to an embodiment of the invention;

FIG. 2 is a partial schematic view of the thrust plate of FIG. 1 mounted on a fender panel;

fig. 3 is a partial sectional view of the first and second coils mounted on the thrust plate and the shield plate, respectively.

Main element number description:

1. a swash plate; 2. a return disk; 3. perforating; 4. a thrust plate;

5. a first coil; 6. a second coil; 7. a slipper; 8. a protection plate;

9. a connecting plate; 10. a cylinder body; 11. a plunger; 12. a main shaft.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Where the terms "first", "second", etc. are used for descriptive purposes only and not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise specified, the term "connected" is to be understood broadly, for example, it may be a fixed connection, a detachable connection, a direct connection, or an indirect connection via an intermediate medium, and it is obvious to those skilled in the art that the above terms are used in the patent in a specific sense.

Implementation mode one

As shown in fig. 1 and 3, the present invention provides a plunger pump swash plate assembly with self-feedback dynamic and static characteristics, which includes a swash plate 1, a magnetic return plate 2, a plurality of thrust plates 4, a first coil 5 and a second coil 6, wherein the return plate 2 is axially opposite to the swash plate 1, the thrust plates 4 are circumferentially spaced apart from each other on a side of the return plate 2 facing away from the swash plate 1, and the thrust plates 4 are fixed relative to the swash plate 1 to limit an axial position of the return plate 2 between the swash plate 1 and the thrust plates 4, and when the return plate 2 rotates with a plunger 11 of a plunger pump, the thrust plates 4 can limit an axial position of the return plate 2, so that a slipper 7 mounted on the return plate 2 is kept in contact with the swash plate 1, and the contact is not limited to direct contact, but may also be indirect contact; a first coil 5 and a second coil 6 are respectively provided on the thrust plate 4 and the side of the swash plate 1 facing the return plate 2 to provide a magnetic field to the return plate 2.

When the device is used, the first coil 5 and the second coil 6 are electrified, for example, the first coil 5 and the second coil 6 are electrified by adopting an external power supply, a magnetic field is generated between the first coil 5 and the second coil 6, and because the return plate 2 has magnetism, when the return plate 2 vibrates, the magnetic field changes, so that potential difference exists between the coils, and accordingly, the dynamic and static characteristics of the return plate 2 can be detected. For example, if the magnetic field changes greatly, it may reflect that the vibration or bounce amplitude of the return disk 2 is large, the return disk 2 may present an axial dynamic characteristic, and may also reflect that the moving state of the slipper is unstable, and if the magnetic field changes little or substantially no change, it may reflect that the vibration or bounce amplitude of the return disk 2 is small or no vibration or bounce, and the return disk 2 may present an axial static characteristic.

According to the invention, the magnetic return disc 2 is arranged, and the coil is arranged to provide a magnetic field for the return disc 2, so that the dynamic and static characteristics of the return disc are fed back in real time during the actual operation of the plunger pump, the actual operation condition of the plunger pump is reflected, the structure is simple, a remarkable technical effect is generated, and the problem that the dynamic and static characteristics of the return disc cannot be detected in real time during the operation process of the plunger pump in the prior art is effectively solved.

The invention provides a non-contact detection scheme, which can not influence the normal motion of a return disc, realizes the real-time collection of the dynamic and static characteristics of the return disc in the running process of a plunger pump and analyzes the vibration characteristics of a main pump rotor component. The actual operation condition of the plunger pump can be detected truly, accurately and in real time by integrating the detection part on the swash plate, namely, inside the plunger pump.

In some embodiments, the plunger pump swash plate assembly further comprises a hall sensor, for example employing a hall displacement sensor, for detecting the change in the magnetic field. However, the present invention is not limited thereto, and in other embodiments, other prior art means may be adopted to detect the change of the magnetic field.

In some embodiments, the material of the return disc 2 is a permanent magnetic material, which has strong magnetism and constant magnetism, so as to improve the detection sensitivity and accuracy.

In some embodiments, as shown in fig. 1, the return disc 2 is provided with a plurality of through holes 3 for the sliding shoes 7 to pass through along the circumferential direction, and a protection plate 8 for friction contact with the sliding shoes 7 is fixed on one side of the swash plate 1 facing the return disc 2. The inventor considers that the cost of maintenance of swash plate 1 is higher, has set up guard plate 8 on swash plate 1, makes guard plate 8 and piston shoe 7 frictional contact, and swash plate 1 is direct not with piston shoe 7 frictional contact, prevents that swash plate 1 from receiving the wearing and tearing, plays guard action to swash plate 1, when guard plate 8 takes place wearing and tearing, only need change or maintain guard plate 8 can, reduce maintenance and replacement cost.

Further, as shown in fig. 3, the second coil 6 is fixed to the surface of the shield plate 8 facing the return disc 2, for example, the second coil 6 is fixed to the surface of the return disc 2 by being fitted thereto, and similarly, the first coil 5 may be fixed to the surface of the thrust plate 4 by being fitted thereto.

Further, as shown in fig. 1, the swash plate assembly of the plunger pump further includes a plurality of connection plates 9 fixed on the protection plate 8, the connection plates 9 are disposed on the radial outer side of the return plate 2 and spaced from the return plate 2 so as not to obstruct the rotation of the return plate 2, and the connection plates 9 are respectively connected with the thrust plates 4. For example, the thrust plate 4 is fixedly connected to the connecting plate 9 by screws.

As shown in fig. 2, specifically, for example, the connecting plate 9 extends along the outer edge of the return disk 2 in a curved manner, and extends to the thrust plate 4 along the axial direction of the return disk 2, the thrust plate 4 is substantially parallel to the return disk 2, and a plurality of thrust plates 4 are arranged at equal intervals along the circumferential direction of the return disk 2, for example, the number of the thrust plates 4 is four, and the four thrust plates 4 are spaced at 90 °.

Further, as shown in fig. 1 and 2, the plurality of thrust plates 4 are located outside the plurality of through holes 3 in the radial direction of the return disc 2 so as not to prevent the thrust plates 4 from obstructing the rotation of the shoe 7 with the plunger 11.

Further, guard plate 8 is the antifriction plate to improve guard plate 8's wearability, prolong guard plate 8's life, reduce maintenance and replacement cost. For example, the wear plate is made of wear-resistant material, or the wear plate is subjected to wear-resistant strengthening treatment on the surface.

In some embodiments, as shown in fig. 1 and fig. 2, the plurality of thrust plates 4 axially correspond to the outer periphery of the return disc 2, that is, the outer periphery of the return disc 2 extends into an axial gap between the plurality of thrust plates 4 and the swash plate 1 (or the protection plate 8), and the coil generates a magnetic field in the axial gap, so that when the return disc 2 vibrates or jumps, the displacement of the outer periphery is larger relative to other parts, thereby easily causing a change in the magnetic field, and further improving the detection sensitivity and accuracy.

In some embodiments, the side of the thrust plates 4 facing the return disc 2 is provided with a first coil 5, and correspondingly, the side of the swash plate 1 (or the protection plate 8) facing the return disc 2 is provided with a plurality of second coils corresponding to the first coils 5, respectively, so as to generate a plurality of magnetic fields, thereby further improving the detection sensitivity and accuracy.

The invention is not limited to this, and in other embodiments, it is also possible to provide the first coil 5 only on one or a part of the thrust plate 4, and all of them are within the protection scope of the invention.

Second embodiment

As shown in fig. 1 to 3, the present invention also provides a plunger pump including the plunger pump swash plate assembly of the first embodiment. The structure, the working principle and the beneficial effects of the plunger pump swash plate assembly of the embodiment are the same as those of the first embodiment, and are not described again here.

According to the plunger pump, the magnetic return disc is arranged, the coil is arranged to provide a magnetic field for the return disc, and the plunger pump can feed back the dynamic and static characteristics of the return disc in real time during actual operation, so that the actual operation condition of the plunger pump is reflected, the structure is simple, a remarkable technical effect is generated, and the problem that the dynamic and static characteristics of the return disc cannot be detected in real time in the operation process of the plunger pump in the prior art is effectively solved.

In some embodiments, as shown in fig. 1, the plunger pump further includes a plurality of shoes 7, a cylinder block 10, a plurality of plungers 11, and a main shaft 12, the plurality of shoes 7 being disposed at intervals along a circumferential direction of the return plate 2 and respectively axially penetrating the return plate 2, so that one end of the shoes 7 is in frictional contact with the swash plate 1 (or the shielding plate 8), and the other end of the shoes 7 is connected to the plungers 11; cylinder block 10 is equipped with the shaft hole and a plurality of plunger hole that set up around the shaft hole interval, the central axis of sloping cam plate 1 and the central axis of return stroke dish 2 incline for the central axis of cylinder block 10, a plurality of plungers 11 are connected with a plurality of piston shoes 7 respectively, and wear to locate a plurality of plunger holes respectively, main shaft 12 passes sloping cam plate 1, return stroke dish 2 and shaft hole, main shaft 12 can drive cylinder block 10 rotatory, cylinder block 10 can drive a plurality of plungers 11 rotatory around the central axis of cylinder block 10, a plurality of plungers 11 drive a plurality of piston shoes 7 and return stroke dish 2 rotatory around the central axis of return stroke dish 2, in-process, because sloping cam plate 1 and return stroke dish 2 are the slope structure, make a plurality of plungers 11 move along the axial direction of cylinder block 10 simultaneously, thereby accomplish the oil absorption and discharge.

Other structures of the plunger pump of the present embodiment are the same as those of the axial plunger pump of the prior art, and thus are not described in detail.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention. It should be noted that the components of the present invention are not limited to the above-mentioned whole application, and various technical features described in the present specification can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention.