Piston rod supporting structure of piston machine

Abstract

The utility model discloses a piston rod supporting structure of a piston machine. The piston rod supporting structure comprises a cylinder body and a piston rod, the cylinder body is of a hollow structure, a pump cover is installed at an opening in one end of the cylinder body, and a sealing flange is installed at an opening in the other end of the cylinder body. One end of the piston rod is located outside the cylinder body, the other end of the piston rod penetrates through the sealing flange and extends into the cylinder body, the outer surface of the piston rod is slidably sleeved with a bearing, and the bearing is fixedly installed in the sealing flange; the outer surface of the piston rod is fixedly sleeved with a piston ring. Through the supporting ring installed on the piston ring and the bearing installed on the sealing flange, the two ends of the piston rod can be supported, normal movement of the piston rod is not affected, and therefore concentricity of the piston rod and the cylinder body can be guaranteed, the phenomenon that the piston ring, the supporting ring and the sealing ring are abraded in advance due to the eccentricity phenomenon is avoided, and the service life of the piston rod is prolonged. And the service life of the piston machine is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of piston machines, in particular to a piston rod supporting structure of a piston machine. Background Art

[0002] A piston machine is a mechanical device that uses the reciprocating motion of a piston to achieve a specific function. Among them, the reciprocating piston machine is the most widely used piston machine due to its high efficiency, easy maintenance and long life.

[0003] Currently, existing piston engines rely on the threads at the end of the piston rod for threaded connection when installed with external equipment. However, after installation, the piston and cylinder will be out of center, i.e. eccentric, due to the influence of their own weight. Although the piston is made of a material with a lower density to make it as light as possible, the eccentricity still exists, which eventually leads to premature wear of maintenance parts such as the piston ring and support ring, and the piston engine cannot have a good service life. Utility Model Content

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose a piston rod support structure for a piston machine, so as to solve the problem that the piston rod of the current piston machine is easily eccentric after being connected to an external device.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A piston rod supporting structure of a piston engine, comprising a cylinder body and a piston rod;

[0007] The cylinder body is a hollow structure, a pump cover is installed at an opening at one end of the cylinder body, and a sealing flange is installed at an opening at the other end of the cylinder body;

[0008] One end of the piston rod is located outside the cylinder body, and the other end of the piston rod passes through the sealing flange and extends into the interior of the cylinder body. A bearing is provided on the sliding sleeve of the outer surface of the piston rod, and the bearing is fixedly installed inside the sealing flange;

[0009] The outer surface of the piston rod is fixedly sleeved with a piston ring, which is located inside the cylinder body. The piston ring divides the interior of the cylinder body into a left chamber and a right chamber. The outer surface of the piston ring is fixedly sleeved with two support rings, and several sealing rings are provided between the two support rings. The axes of the cylinder body, piston rod, sealing flange, bearing, piston ring, support ring and sealing ring are located on the same straight line.

[0010] Preferably, the inner side wall of the open end of the sealing flange extends inward to form a first annular seat, the outer sleeve of the piston rod is provided with a retaining spring, the interior of the sealing flange is provided with a first mounting groove, the retaining spring is installed in the first mounting groove, and the bearing clamping limit is located between the retaining spring and the first annular seat.

[0011] Preferably, the retaining spring is located at an end of the sealing flange away from the cylinder body.

[0012] Preferably, a second annular seat is provided on the inner side wall of the cylinder body, and a sealing member is installed between the second annular seat and the sealing flange.

[0013] Preferably, a first limiting ring and a second limiting ring are coaxially mounted on the outer surface of the piston rod, and the piston ring clamping limiter is located between the first limiting ring and the second limiting ring.

[0014] Preferably, the first limiting ring and the piston rod are an integrally formed structure, the second limiting ring is threadedly connected to the piston rod, and the second limiting ring is located between the pump cover and the first limiting ring.

[0015] Preferably, both ends of the piston ring are provided with positioning grooves, and the first limiting ring and the second limiting ring are respectively located in the corresponding positioning grooves and block the positioning grooves.

[0016] Preferably, the outer surface of the piston ring is provided with a plurality of second mounting grooves adapted to the support ring and the sealing ring, and the support ring and the sealing ring are respectively installed in the corresponding second mounting grooves.

[0017] Preferably, one end surface of each of the support rings is provided with a plurality of through holes, and the plurality of through holes are provided through the side wall and the other end surface of the support ring.

[0018] Preferably, the bearing is a sliding bearing.

[0019] The technical solution provided by the utility model may have the following beneficial effects:

[0020] By installing the support ring on the piston ring and the bearing on the sealing flange, the two ends of the piston rod can be supported without affecting the normal movement of the piston rod, thereby ensuring the concentricity of the piston rod and the cylinder body, avoiding eccentricity that causes premature wear of the piston ring, support ring and sealing ring, and ensuring the service life of the piston engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural sectional view of the piston engine of the present utility model;

[0022] Figure 2 It is a structural schematic diagram of the support ring of the utility model.

[0023] Among them: 1. Cylinder body; 11. Left chamber; 12. Right chamber; 13. Sealing flange; 131. First annular seat; 132. Retaining ring; 14. Bearing; 15. Second annular seat; 16. Sealing element; 2. Piston rod; 21. Piston ring; 22. Support ring; 221. Through hole; 23. Sealing ring; 24. First limiting ring; 25. Second limiting ring. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the described features, without distinction of order or importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] Below is the attached figure Figures 1 to 2 The technical solution of the utility model is further illustrated through specific implementation methods.

[0028] like Figure 1-2 As shown, a piston rod supporting structure of a piston engine includes a cylinder body 1 and a piston rod 2;

[0029] The cylinder body 1 is a hollow structure, a pump cover is installed at one end opening of the cylinder body 1, and a sealing flange 13 is installed at the other end opening of the cylinder body 1;

[0030] One end of the piston rod 2 is located outside the cylinder body 1, and the other end of the piston rod 2 passes through the sealing flange 13 and extends into the interior of the cylinder body 1. A bearing 14 is provided on the outer surface of the piston rod 2, and the bearing 14 is fixedly installed inside the sealing flange 13.

[0031] The outer surface of the piston rod 2 is fixedly sleeved with a piston ring 21, and the piston ring 21 is located inside the cylinder body 1. The piston ring 21 divides the interior of the cylinder body 1 into a left chamber 11 and a right chamber 12. The outer surface of the piston ring 21 is fixedly sleeved with two support rings 22, and a plurality of sealing rings 23 are provided between the two support rings 22. The axes of the cylinder body 1, piston rod 2, sealing flange 13, bearing 14, piston ring 21, support ring 22 and sealing ring 23 are located on the same straight line.

[0032] By installing the support ring 22 on the piston ring 21 and the bearing 14 on the sealing flange 13, the two ends of the piston rod 2 can be supported without affecting the normal movement of the piston rod 2, thereby ensuring the concentricity of the piston rod 2 and the cylinder body 1, avoiding the eccentricity that causes premature wear of the piston ring 21, support ring 22 and sealing ring 23, and ensuring the service life of the piston engine.

[0033] like Figure 1 As shown, the inner side wall of the open end of the sealing flange 13 extends inward to form a first annular seat 131, the outer sleeve of the piston rod 2 is provided with a retaining spring 132, the interior of the sealing flange 13 is provided with a first mounting groove, the retaining spring 132 is installed in the first mounting groove, and the clamping limit of the bearing 14 is located between the retaining spring 132 and the first annular seat 131.

[0034] Specifically, the bearing 14 is clamped by the retaining spring 132 and the first annular seat 131 , so that the bearing 14 is fixed inside the sealing flange 13 , which facilitates installation and removal of the bearing 14 and the sealing flange 13 .

[0035] like Figure 1 As shown, the retaining spring 132 is located at the end of the sealing flange 13 away from the cylinder body 1 .

[0036] Specifically, the retaining spring 132 is located at the end of the sealing flange 13 away from the cylinder body 1 . The user does not need to separate the sealing flange 13 from the cylinder body 1 to remove the retaining spring 132 , thereby facilitating the disassembly and assembly of the bearing 14 .

[0037] like Figure 1 As shown, a second annular seat 15 is provided on the inner side wall of the cylinder body 1 , and a sealing member 16 is installed between the second annular seat 15 and the sealing flange 13 .

[0038] Specifically, the sealing member 16 can improve the sealing performance of the piston engine and prevent foreign matter on the outer surface of the piston rod 2 from entering the cylinder body 1 .

[0039] like Figure 1 As shown, a first limiting ring 24 and a second limiting ring 25 are coaxially mounted on the outer surface of the piston rod 2 , and the piston ring 21 is clamped and limited between the first limiting ring 24 and the second limiting ring 25 .

[0040] Specifically, the piston ring 21 can be fixedly mounted on the outside of the piston rod 2 by clamping the piston ring 21 with the first limiting ring 24 and the second limiting ring 25 .

[0041] like Figure 1 As shown, the first limiting ring 24 and the piston rod 2 are an integrally formed structure, the second limiting ring 25 is threadedly connected to the piston rod 2 , and the second limiting ring 25 is located between the pump cover and the first limiting ring 24 .

[0042] Specifically, the first limiting ring 24 and the piston rod 2 are an integrally formed structure, which can reduce the required parts and facilitate processing. Furthermore, the second limiting ring 25 is located between the pump cover and the first limiting ring 24, and the second limiting ring 25 is threadedly connected to the piston rod 2. When the piston ring 21 is damaged, only the pump cover needs to be removed, and the second limiting ring 25 can be removed to replace the piston ring 21, which facilitates the maintenance of the piston machine.

[0043] like Figure 1 As shown, both ends of the piston ring 21 are provided with positioning grooves, and the first limiting ring 24 and the second limiting ring 25 are respectively located in the corresponding positioning grooves and block the positioning grooves.

[0044] Specifically, the first limiting ring 24 and the second limiting ring 25 are respectively located in the corresponding positioning grooves and block the positioning grooves. The piston ring 21 can be supported by the first limiting ring 24 and the second limiting ring 25, thereby improving the strength of the piston ring 21 and improving the sealing between the piston ring 21 and the piston rod 2.

[0045] like Figure 1 and 2 As shown, the outer surface of the piston ring 21 is provided with a plurality of second mounting grooves adapted to the support ring 22 and the sealing ring 23 , and the support ring 22 and the sealing ring 23 are respectively installed in the corresponding second mounting grooves.

[0046] Specifically, the support ring 22 and the sealing ring 23 are installed in the corresponding second installation grooves, so that the support ring 22 and the sealing ring 23 can be stably fixed on the piston ring 21 and the support ring 22 and the sealing ring 23 can be easily disassembled and assembled with the piston ring 21.

[0047] like Figure 1 and 2 As shown, a plurality of through holes 221 are formed on one end surface of each support ring 22 , and the plurality of through holes 221 are formed through the side wall and the other end surface of the support ring 22 .

[0048] Specifically, the through hole 221 is provided so that the fluid can contact the sealing ring 23 through the through hole 221 , thereby reducing the axial force on the support ring 22 and improving the service life of the support ring 22 .

[0049] like Figure 1 As shown, the bearing 14 is a linear bearing.

[0050] Specifically, the linear bearing can withstand a large axial load, thereby providing stable support for the piston rod 2 , ensuring that the piston rod 2 can maintain stable operation when subjected to a large pressure, and ensuring the concentricity of the piston rod 2 and the cylinder body 1 .

[0051] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A piston rod support structure for a piston engine, characterized in that: It comprises a cylinder body (1) and a piston rod (2); The cylinder body (1) is a hollow structure, a pump cover is installed at an opening at one end of the cylinder body (1), and a sealing flange (13) is installed at an opening at the other end of the cylinder body (1); One end of the piston rod (2) is located outside the cylinder body (1), and the other end of the piston rod (2) passes through the sealing flange (13) and extends to the inside of the cylinder body (1). A bearing (14) is provided on the sliding sleeve of the outer surface of the piston rod (2), and the bearing (14) is fixedly installed inside the sealing flange (13); The outer surface of the piston rod (2) is fixedly sleeved with a piston ring (21), and the piston ring (21) is located inside the cylinder body (1). The piston ring (21) divides the interior of the cylinder body (1) into a left chamber (11) and a right chamber (12). The outer surface of the piston ring (21) is fixedly sleeved with two support rings (22), and a plurality of sealing rings (23) are provided between the two support rings (22). The axes of the cylinder body (1), the piston rod (2), the sealing flange (13), the bearing (14), the piston ring (21), the support ring (22) and the sealing ring (23) are located on the same straight line.

2. The piston rod support structure of a piston engine according to claim 1, characterized in that: The inner side wall of the open end of the sealing flange (13) extends inward to form a first annular seat (131), the outer sleeve of the piston rod (2) is provided with a retaining spring (132), the interior of the sealing flange (13) is provided with a first mounting groove, the retaining spring (132) is installed in the first mounting groove, and the clamping limit of the bearing (14) is located between the retaining spring (132) and the first annular seat (131).

3. The piston rod support structure of a piston engine according to claim 2, characterized in that: The retaining spring (132) is located at an end of the sealing flange (13) away from the cylinder body (1).

4. The piston rod support structure of a piston engine according to claim 1, characterized in that: A second annular seat (15) is provided on the inner side wall of the cylinder body (1), and a sealing member (16) is installed between the second annular seat (15) and the sealing flange (13).

5. The piston rod support structure of a piston engine according to claim 1, characterized in that: A first limiting ring (24) and a second limiting ring (25) are coaxially mounted on the outer surface of the piston rod (2), and the piston ring (21) is clamped and limited between the first limiting ring (24) and the second limiting ring (25).

6. The piston rod support structure of a piston engine according to claim 5, characterized in that: The first limiting ring (24) and the piston rod (2) are an integrally formed structure, the second limiting ring (25) is threadedly connected to the piston rod (2), and the second limiting ring (25) is located between the pump cover and the first limiting ring (24).

7. The piston rod support structure of a piston engine according to claim 5, characterized in that: Both ends of the piston ring (21) are provided with positioning grooves, and the first limiting ring (24) and the second limiting ring (25) are respectively located in the corresponding positioning grooves and block the positioning grooves.

8. The piston rod supporting structure of a piston engine according to claim 1, characterized in that: The outer surface of the piston ring (21) is provided with a plurality of second mounting grooves adapted to the support ring (22) and the sealing ring (23), and the support ring (22) and the sealing ring (23) are respectively mounted in the corresponding second mounting grooves.

9. The piston rod support structure of a piston engine according to claim 1, characterized in that: One end surface of each support ring (22) is provided with a plurality of through holes (221), and the plurality of through holes (221) are arranged through the side wall and the other end surface of the support ring (22).

10. The piston rod supporting structure of a piston engine according to claim 1, characterized in that: The bearing (14) is a sliding bearing.

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