CN113653635B

CN113653635B - Cylinder body sliding support structure and hydraulic plunger pump

Info

Publication number: CN113653635B
Application number: CN202111000712.XA
Authority: CN
Inventors: 穆文堪; 高翔; 谯维智; 陆红林; 尚耀星; 刘晓超
Original assignee: Beihang University; Ningbo Institute of Innovation of Beihang University
Current assignee: Beihang University; Ningbo Institute of Innovation of Beihang University
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2023-06-20
Anticipated expiration: 2041-08-30
Also published as: CN113653635A

Abstract

The utility model provides a cylinder body sliding support structure and hydraulic plunger pump, includes casing and cylinder body, still includes slide bearing, install in the casing inner chamber slide bearing, slide bearing inner chamber's interior ring face with the outer ring face sliding connection of cylinder body, the cylinder body can be followed slide bearing inner chamber's axis is rotatory. The sliding bearing is arranged on the outer ring surface of the pump cylinder body, the inner cavity of the bearing is matched with the outer ring surface of the cylinder body, the cylinder body is lubricated and supported through a static pressure oil film formed between the inner cavity of the bearing and the outer ring surface of the cylinder body when rotating, and the dumping moment of the cylinder body when working is transferred to the shell through the sliding bearing and finally born by the shell, so that the working reliability of the hydraulic pump cylinder body can be ensured, and the hydraulic pump cylinder body has the advantages of convenience in installation, simple structure, small size and light weight.

Description

Cylinder body sliding support structure and hydraulic plunger pump

Technical Field

The disclosure belongs to the technical field of hydraulic pumps, and particularly relates to a cylinder sliding support structure and a hydraulic plunger pump.

Background

Hydraulic ram pumps/motors are of various kinds and are classified into two types, an inner support and an outer support, according to the manner of cylinder support. The inner supporting structure mainly supports the cylinder body through a pump central shaft, and the central shaft bears the dumping moment of the cylinder body; the outer supporting structure is mainly characterized in that a set of bearings is added on the outer circle of the cylinder body, and the dumping moment of the cylinder body is born by the set of bearings so as to ensure that the pump can work stably and reliably.

The existing bearing for the outer supporting structure of the plunger pump generally adopts a cylindrical roller bearing, the supporting structure works stably, the limit rotating speed of the pump is relatively high, and the only disadvantage is that the occupied volume space is relatively large.

Disclosure of Invention

In order to solve at least one of the above technical problems, a first object of the present disclosure is to provide a cylinder sliding support structure with an adjustable initial swing angle, which has the advantages of convenient installation, compact structure, and reduced volume and weight.

A second object of the present disclosure is to provide a hydraulic ram pump including the above cylinder sliding support structure;

in order to achieve the first object of the present disclosure, the technical solution adopted in the present disclosure is as follows:

the utility model provides a cylinder body sliding support structure, includes casing and cylinder body, still includes slide bearing, install in the casing inner chamber slide bearing, slide bearing inner chamber's inner ring face with the outer loop face sliding connection of cylinder body, the cylinder body can follow slide bearing inner chamber's axis is rotatory.

Optionally, a rotation limiting part for preventing the sliding bearing from rotating around the axis is further arranged between the sliding bearing and the shell.

Optionally, the sliding bearing is a revolving body structure, the sliding bearing comprises a sliding part, a transition part and a mounting part which are sequentially connected along the axis direction, the outer annular surface diameter of the sliding part is smaller than that of the mounting part, and the mounting part is mounted in the inner cavity of the shell.

Optionally, the rotation limiting portion includes a stop pin, a stop pin groove is formed in the mounting portion, the stop pin is fixedly mounted on the housing, and the stop pin extends into the stop pin groove.

Optionally, one end of the inner cavity of the shell is an open end, the other end of the inner cavity of the shell is a closed end, a circle of steps is arranged in the inner cavity of the shell of the closed end, and the end face of the mounting part is stopped at the side face of each step.

Optionally, a stop pin mounting hole is formed in the side face of the step, and one end of the stop pin is mounted in the stop pin mounting hole.

Optionally, a ring groove is formed in the surface of the inner ring cavity of the sliding bearing.

Optionally, the cylinder body is a revolution solid structure, the middle part of the cylinder body is provided with a shaft hole, and a plurality of plunger holes are uniformly formed along the axis of the cylinder body.

Optionally, an oil distribution disc is installed on the side face of the cylinder body, two kidney-shaped holes are formed in the oil distribution disc, and the kidney-shaped holes are matched with the plunger holes and used for distributing flow to the cylinder body.

In order to achieve the second object of the present disclosure, the technical solution adopted in the present disclosure is as follows:

a hydraulic plunger pump comprises the cylinder body sliding support structure.

The sliding bearing is arranged on the outer ring surface of the pump cylinder body, the inner cavity of the bearing is matched with the outer ring surface of the cylinder body, the cylinder body is lubricated and supported through a static pressure oil film formed between the inner cavity of the bearing and the outer ring surface of the cylinder body when rotating, and the dumping moment of the cylinder body when working is transferred to the shell through the sliding bearing and finally born by the shell, so that the working reliability of the hydraulic pump cylinder body can be ensured, and the hydraulic pump cylinder body has the advantages of convenience in installation, simple structure, small size and light weight.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a schematic structural view of a cylinder slide support structure of the present disclosure;

fig. 2 is a schematic structural view of a rotation limiter of the present disclosure.

Detailed Description

The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.

In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

The utility model provides a cylinder body sliding support structure, includes casing 1, cylinder body 2 and slide bearing 3, and wherein casing 1 is the shell of whole plunger pump, has the inner chamber in casing 1 for install the part, install in the casing 1 inner chamber slide bearing 3, this slide bearing 3 and casing 1 fixed connection, slide bearing 3 inner chamber's interior anchor ring with the outer annular sliding connection of cylinder body 2, cylinder body 2 can be followed slide bearing 3 inner chamber's axis is rotatory, cylinder body 2 can be the solid of revolution structure, the shaft hole 21 has been seted up at cylinder body 2 middle part can be connected with the engine pivot of plunger pump, drives cylinder body 2 rotation, has evenly seted up a plurality of plunger holes 22 along cylinder body 2's axis, can install the plunger in the plunger hole 22, and when cylinder body 2 was rotatory, the plunger was flexible in plunger hole 22, realized inhaling the action of plunger hole 22 or pushing out the fluid. The sliding bearing 3 may be a solid of revolution. An oil distribution disc is arranged on the side face of the cylinder body 2, two kidney-shaped holes are formed in the oil distribution disc 4, one end of each kidney-shaped hole is communicated with the inlet and the outlet of the pump, the other end of each kidney-shaped hole is matched with a plunger hole 22 in the cylinder body 2 and used for distributing flow to the cylinder body 2, and oil is absorbed through the inlet of the oil distribution disc 4 and discharged through the outlet when the oil distribution disc is in operation.

The cylinder body 2 in this disclosure lubricates and supports through the static pressure oil film that forms between the two when rotatory, has easy to assemble, simple structure, small, light in weight's advantage to the moment of toppling over of cylinder body 2 during operation is transmitted casing 1 again through slide bearing 3, finally bears by casing 1, can guarantee the reliability of hydraulic pump cylinder body 2 work.

In an embodiment, the sliding bearing 3 comprises a sliding part 31, a transition part 32 and a mounting part 33 which are sequentially connected along the axial direction of the sliding bearing, the mounting part 33 is mounted in the inner cavity of the shell 1 and is used for being connected with the shell 1, the outer ring surface of the mounting part 33 is matched and positioned with the ring surface of the inner cavity of the shell 1, the diameter of the outer ring surface of the sliding part 31 is smaller than that of the outer ring surface of the mounting part 33, the machining surface is reduced, the sliding bearing 3 can also be matched and positioned with the ring surface of the inner cavity of the shell 1 through the outer ring surfaces at two ends, and the middle part of the outer ring of the sliding bearing 3 is grooved to reduce the area of the machining surface.

In an embodiment, a rotation limiting part for preventing the sliding bearing from rotating around the axis is also arranged between the sliding bearing 3 and the shell 1. When the cylinder body 2 rotates, the cylinder body rotates relative to the sliding bearing 3, the rotation limiting part can limit the rotation of the sliding bearing 3 relative to the shell 1, and the cylinder body 2 is prevented from rotating to drive the sliding bearing 3 to rotate. The rotation limiting portion may be a sliding bearing 3 mounted on the housing 1 by a bolt; the rotation limiting portion may be provided in a spline groove and spline fit manner, preventing the sliding bearing 3 from rotating. Referring to fig. 2, in this embodiment, the rotation limiting portion includes a stop pin 51, the mounting portion 33 is provided with a stop pin slot 34, the housing 1 is fixedly mounted with the stop pin 51, and the stop pin 51 extends into the stop pin slot 34. The sliding bearing 3 is stopped against rotation by a stop pin 51 in the stop pin groove 34.

In a preferred embodiment, one end of the inner cavity of the casing 1 is an open end 11, the other end is a closed end 12, a circle of steps 13 is arranged in the inner cavity of the casing 1 of the closed end 12, the end surface of the mounting part 33 is stopped at the side surface of the steps 13, and the mounting position of the sliding bearing 3 can be positioned by matching the end surface of the mounting part 33 with the side surface of the steps 13. The side surface of the step 13 is provided with a stop pin mounting hole, and one end of the stop pin 34 is mounted in the stop pin mounting hole. The radial fit clearance between the stop pin 34 used for positioning the sliding bearing and the sliding bearing 3 is not excessive, and the excessive clearance can affect the stability of the support of the pump cylinder body.

In another preferred embodiment, a ring groove 35 is formed on the surface of the inner ring cavity of the sliding bearing 3. The first ring groove 35 ensures that oil lubrication exists between two sliding friction pairs, and dry friction is prevented; secondly, tiny particles brought in by oil or generated in the working process of the pump can be contained, so that the anti-pollution capability of the pump is improved; and thirdly, the contact area of the two friction surfaces is effectively reduced, and the friction force is reduced.

Example two

A hydraulic plunger pump comprises the cylinder body sliding support structure. The hydraulic plunger pump has the advantages of convenient installation, simple structure, small volume, light weight and the like through the cylinder body sliding support structure.

The sliding bearing is arranged on the outer ring surface of the pump cylinder body, the inner cavity of the bearing is matched with the outer ring surface of the cylinder body, and the cylinder body is lubricated and supported through a static pressure oil film formed between the inner cavity and the outer ring surface of the cylinder body when rotating. Has the advantages of convenient installation, simple structure, small volume and light weight.

In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the present application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.

Claims

1. The cylinder body sliding support structure comprises a shell and a cylinder body, and is characterized by further comprising a sliding bearing, wherein the sliding bearing is arranged in an inner cavity of the shell, an inner ring surface of the inner cavity of the sliding bearing is in sliding connection with an outer ring surface of the cylinder body, and the cylinder body can rotate along an axis of the inner cavity of the sliding bearing;

the sliding bearing is of a revolving body structure, and comprises a sliding part, a transition part and a mounting part which are sequentially connected along the axis direction, wherein the diameter of the outer annular surface of the sliding part is smaller than that of the outer annular surface of the mounting part, and the mounting part is mounted in the inner cavity of the shell;

one end of the inner cavity of the shell is an open end, the other end of the inner cavity of the shell is a closed end, a circle of steps are arranged in the inner cavity of the shell of the closed end, and the end face of the mounting part is stopped at the side face of each step;

a rotation limiting part for preventing the sliding bearing from rotating around the axis is also arranged between the sliding bearing and the shell;

the rotation limiting part comprises a stop pin, a stop pin groove is formed in the mounting part, the stop pin is fixedly mounted on the shell, and the stop pin extends into the stop pin groove;

the side face of the step is provided with a stop pin mounting hole, and one end of the stop pin is mounted in the stop pin mounting hole.

2. The cylinder sliding support structure as claimed in claim 1, wherein: the surface of the inner ring cavity of the sliding bearing is provided with a circle of ring grooves.

3. The cylinder sliding support structure as claimed in claim 1, wherein: the cylinder body is a revolution solid structure, the middle part of the cylinder body is provided with a shaft hole, and a plurality of plunger holes are uniformly formed along the axis of the cylinder body.

4. A cylinder sliding support structure as claimed in claim 3, wherein: an oil distribution disc is arranged on the side face of the cylinder body, two kidney-shaped holes are formed in the oil distribution disc, and the kidney-shaped holes are matched with the plunger holes and are used for distributing flow to the cylinder body.

5. A hydraulic plunger pump, characterized in that: comprising the cylinder sliding support structure of claim 1.