CN209977246U - Transmission shaft sealing cover structure for axial plunger pump and axial plunger pump - Google Patents
Transmission shaft sealing cover structure for axial plunger pump and axial plunger pump Download PDFInfo
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- CN209977246U CN209977246U CN201920796191.5U CN201920796191U CN209977246U CN 209977246 U CN209977246 U CN 209977246U CN 201920796191 U CN201920796191 U CN 201920796191U CN 209977246 U CN209977246 U CN 209977246U
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- transmission shaft
- oil seal
- framework oil
- plunger pump
- axial plunger
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Abstract
The utility model provides a transmission shaft sealing cover structure for an axial plunger pump and the axial plunger pump, which comprises a cover body, a framework oil seal and a first snap spring; the cover body is provided with a transmission shaft mounting hole, and the framework oil seal and the first clamp spring are mounted in the transmission shaft mounting hole; the transmission shaft mounting pore is formed by a first mounting pore with a larger pore diameter and a second mounting pore with a smaller pore diameter from the outer side surface to the inner side surface of the cover body in sequence; the framework oil seal is installed in the first installation hole and corresponds to a first clamp spring installation groove is formed in the side wall of the first installation hole of the outer side face of the framework oil seal, and the first clamp spring is installed in the first clamp spring installation groove. Compared with the prior art, the utility model arranges the first mounting pore with larger aperture on the outer side, which is convenient for disassembling and replacing the framework oil seal; and when the inner side surface of the framework oil seal is pushed inwards into the cover body, the framework oil seal is installed in the forward direction, so that the framework oil seal is uniformly stressed and is not easy to deform and damage.
Description
Technical Field
The utility model relates to a sealed lid field of transmission shaft especially relates to a sealed lid structure of transmission shaft and axial plunger pump for axial plunger pump.
Background
The axial plunger pump is an important device of a hydraulic system, and refers to the plunger pump with the reciprocating direction of a piston or a plunger parallel to the central axis of a cylinder body. Axial plunger pumps operate using volume changes produced by the reciprocating motion of a plunger parallel to a drive shaft within a plunger bore. Because the plunger piston and the plunger piston hole are both circular parts, the plunger piston can achieve high precision matching, and therefore, the plunger piston has the advantages of simple structure, small volume, low noise, high efficiency, long service life, self-absorption capacity, high volumetric efficiency and the like. The hydraulic transmission system is widely applied to machines such as machine tool forging, metallurgy, engineering, mines, ships and the like and other hydraulic transmission systems.
The transmission shaft is an important part for transmitting power in the axial plunger pump, and because the transmission shaft penetrates through the pump body to do axial motion inside and outside, a circumferential gap exists between the transmission shaft and the cavity for accommodating the transmission shaft, and the circumferential gap is filled with a lubricating medium, so that the efficient operation of the transmission shaft is ensured. When the pressure in the cavity is higher than the atmospheric pressure, the lubricating medium is easy to leak outwards through the gap; when the pressure in the cavity is lower than the atmospheric pressure, the air is easy to leak into the cavity, so that a transmission shaft sealing cover structure for preventing lubricating medium or air from leaking is required.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a sealing cover body of a transmission shaft sealing cover structure for an axial plunger pump in the prior art, and fig. 2 is a schematic structural diagram of a sealing cover structure of a transmission shaft for an axial plunger pump in the prior art. The sealed lid structure of transmission shaft that has now to be used for axial plunger pump mainly includes: the cover comprises a cover body 1a, a framework oil seal 2a and a first clamp spring 3 a; a transmission shaft mounting hole is formed in the cover body 1a, and the framework oil seal 2a and the first clamp spring 3a are mounted in the transmission shaft mounting hole; the transmission shaft mounting pore channel is composed of a first mounting pore channel 11a with a smaller pore diameter and a second mounting pore channel 12a with a larger pore diameter from the outer side surface of the cover body 1a to the inner side surface of the cover body 1a in sequence; the framework oil seal 2a is installed in the first installation hole 11a, and corresponds to a first clamp spring installation groove 13a is formed in the side wall of the first installation hole 11a of the outer side face of the framework oil seal 2a, and the first clamp spring 3a is installed in the first clamp spring installation groove 13 a. The framework oil seal is provided with an inner side surface 21a and an outer side surface 22 a; and the inner side surface 21a of the framework oil seal is abutted against the first clamp spring 3 a. The installation process is roughly as follows: firstly, pushing the framework oil seal 2a into a second mounting hole 12a of the cover body 1a, and then sequentially pushing the gasket 5 and the first snap spring 3a into the second mounting hole 12a of the cover body 1a, so that the inner side surface 21a of the framework oil seal 2a is abutted against the gasket 5; then the first clamp spring 3a is fixed and limited through the first clamp spring mounting groove 13 a; meanwhile, the framework oil seal 2a is limited and fixed in the cover body 1a by the first clamp spring 3 a; and finally, fixing the cover body 1a provided with the framework oil seal 2a and the first snap spring 3a on the pump body of the axial plunger pump through a second snap spring 4a (not shown).
The sealing cover structure of the transmission shaft in the form has the following technical defects: (1) when the inner side surface 21a of the framework oil seal 2a is pushed outwards into the cover body 1a, the installation is reversed, so that the framework oil seal 2a is easy to deform and damage due to uneven stress, and further lubricating medium or air in the pump body is leaked; (2) when the framework oil seal 2a is disassembled and replaced, the whole transmission shaft sealing cover structure needs to be disassembled from the transmission shaft; change skeleton oil blanket 2a outside the pump body to through first jump ring 3a with its spacing fixed back, install whole transmission shaft seal lid structure on the pump body of axial plunger pump through second jump ring 4a again, change complex operation, have the risk of lubricating medium or air leakage in the pump body simultaneously. (3) Since the inner side surface 21a of the framework oil seal 2a faces the first snap spring 3a, in order to prevent the leakage of the lubricating medium or air, a gasket 5 is required to cover the inner side surface 21a, which results in a complex structure of the sealing cover of the whole transmission shaft. The structure defect of the sealing cover structure of the transmission shaft greatly hinders the efficient and stable operation of the axial plunger pump.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to overcome not enough among the prior art, provide a change convenient, not fragile skeleton oil blanket be used for sealed lid structure of transmission shaft and axial plunger pump of axial plunger pump.
The utility model discloses a transmission shaft sealing cover structure for an axial plunger pump, which comprises a cover body, a framework oil seal and a first snap spring; the cover body is provided with a transmission shaft mounting hole, and the framework oil seal and the first clamp spring are mounted in the transmission shaft mounting hole; the transmission shaft mounting pore is formed by a first mounting pore with a larger pore diameter and a second mounting pore with a smaller pore diameter from the outer side surface of the cover body to the inner side surface of the cover body in sequence; the framework oil seal is installed in the first installation hole and corresponds to a first clamp spring installation groove is formed in the side wall of the first installation hole of the outer side face of the framework oil seal, and the first clamp spring is installed in the first clamp spring installation groove.
Compared with the prior art, a lid body that is used for the sealed lid structure of transmission shaft of axial plunger pump comprises the great first installation pore in aperture and the less second installation pore in aperture in proper order from the lateral surface of lid body to the medial surface of lid body, so the great first installation pore in aperture is in the outside. When the framework oil seal needs to be disassembled and replaced, the framework oil seal can be pushed out only by disassembling the clamp spring; the whole transmission shaft sealing cover structure is not required to be disassembled, and the whole replacement operation is simple and convenient.
Further, the outer side surface of the framework oil seal abuts against the first clamp spring.
Compared with the prior art, a sealed lid structure of transmission shaft for axial plunger pump supports because the lateral surface of skeleton oil blanket supports and leans on the first jump ring, can prevent effectively that lubricating medium or air from leaking from the gap between jump ring and the skeleton oil blanket, has left out the packing ring simultaneously, reduce cost, and has simplified sealed lid structure of transmission shaft and installation procedure. And when the inner side surface of the framework oil seal is pushed inwards into the sealing cover, the framework oil seal is installed in the forward direction, so that the framework oil seal is uniformly stressed and is not easy to deform and damage, and the leakage of a lubricating medium or air in the pump body is further prevented.
Further, the framework oil seal is an annular body.
Further, the cover body is an annular body.
Further, the cover body is made of a rigid material.
The utility model also provides an axial plunger pump, which comprises a pump body, wherein the pump body is provided with a transmission shaft and a transmission shaft sealing cover structure; the transmission shaft sealing cover structure is used for a transmission shaft sealing cover structure of the axial plunger pump.
And the pump body is provided with a second clamp spring mounting groove on the side wall of the sealing cover mounting hole corresponding to the outer side surface of the transmission shaft sealing cover structure, and the second clamp spring is mounted in the second clamp spring mounting groove.
Compared with the prior art, a sealed lid structure of transmission shaft and axial plunger pump for axial plunger pump has following advantage: (1) the outer side surface of the cover body to the inner side surface of the cover body are sequentially composed of a first mounting pore channel with a larger pore diameter and a second mounting pore channel with a smaller pore diameter, and therefore the first mounting pore channel with the larger pore diameter is arranged on the outer side. When the framework oil seal needs to be disassembled and replaced, the framework oil seal can be pushed out only by disassembling the clamp spring; the whole transmission shaft sealing cover structure is not required to be disassembled, and the whole replacement operation is simple and convenient. (2) When the inner side surface of the framework oil seal is pushed inwards into the sealing cover, the framework oil seal is installed in the forward direction, so that the framework oil seal is uniformly stressed and is not easy to deform and damage, and the leakage of a lubricating medium or air in the pump body is further prevented. (3) Because the lateral surface of skeleton oil blanket supports and leans on first jump ring, can effectively prevent lubricating medium or air from leaking from the gap between jump ring and the skeleton oil blanket, has left out the packing ring simultaneously, reduce cost, and has simplified the sealed lid structure of transmission shaft and installation procedure. Above-mentioned advantage of the sealed lid of transmission shaft helps high-efficient, the steady operation of axial plunger pump.
Drawings
Fig. 1 is a schematic structural diagram of a transmission shaft sealing cover structure cover body for an axial plunger pump in the prior art.
Fig. 2 is a schematic structural diagram of a sealing cover structure of a transmission shaft for an axial plunger pump in the prior art.
Fig. 3 is a schematic structural diagram of the cover body of the transmission shaft sealing cover structure for the axial plunger pump of the present invention.
Fig. 4 is a schematic structural diagram of a sealing cover structure of a transmission shaft for an axial plunger pump according to the present invention.
Fig. 5 is a schematic structural view of the axial plunger pump of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 3 and 4, fig. 3 is a schematic structural view of a sealing cover body of a transmission shaft for an axial plunger pump according to the present invention, and fig. 4 is a schematic structural view of a sealing cover structure of a transmission shaft for an axial plunger pump according to the present invention.
A transmission shaft sealing cover structure for an axial plunger pump comprises a cover body 1b, a framework oil seal 2b and a first clamp spring 3 b; a transmission shaft mounting hole is formed in the cover body 1b, and the framework oil seal 2b and the first clamp spring 3b are installed in the transmission shaft mounting hole.
The transmission shaft mounting pore passage is composed of a first mounting pore passage 11b with a larger aperture and a second mounting pore passage 12b with a smaller aperture in sequence from the outer side surface of the cover body 1b to the inner side surface of the cover body 1 b; the framework oil seal 2b is installed in the first installation hole 11b and corresponds to a first clamp spring installation groove 13b is formed in the side wall of the first installation hole 11b of the outer side face of the framework oil seal 2b, and the first clamp spring is installed in the first clamp spring installation groove 13b in a 3b mode.
An inner side surface 21b and an outer side surface 22b are arranged on the framework oil seal 2 b; and the outer side surface 22b of the framework oil seal is abutted against the first clamp spring 3 b.
Preferably, the framework oil seal 2b is an annular body. The cap body 1a is an annular body. The cover body 1a is made of a rigid material.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an axial plunger pump according to the present invention.
Axial plunger pump, including the pump body B, be equipped with the sealed lid structure of transmission shaft S, transmission shaft and second jump ring 4B on the pump body. A second clamp spring mounting groove 41B is formed in the side wall of the sealing cover mounting hole on the pump body B and corresponding to the outer side surface of the sealing cover structure of the transmission shaft, and the second clamp spring 4B is mounted in the second clamp spring mounting groove 41B
A installation process that is used for sealed lid structure of transmission shaft of axial plunger pump as follows:
a) firstly, pushing a framework oil seal 2b into a first mounting hole 11b of a cover body 1b, then pushing a first snap spring 3b into the first mounting hole 11b of the cover body 1b, and enabling an outer side surface 22b of the framework oil seal 2b to abut against the first snap spring 3 b;
b) then the first clamp spring 3b is fixed and limited through the first clamp spring mounting groove 13 b; meanwhile, the framework oil seal 2b is limited and fixed in the cover body 1b by the first clamp spring 3 b;
c) and finally, the cover body 1B provided with the framework oil seal 2B and the first snap spring 3B is clamped and fixed on the second snap spring mounting groove 41B of the pump body B through the second snap spring 4B.
A process as follows that is used for sealed lid structure of transmission shaft of axial plunger pump to change skeleton oil blanket:
(1) disassembling: when the framework oil seal 2b is damaged after the transmission shaft sealing cover structure operates for a period of time, firstly disassembling the first clamp spring 3b at the outer side of the damaged framework oil seal 2b, and then disassembling the framework oil seal 2 b;
(2) reloading: the intact framework oil seal 2b is pushed into the first mounting hole 11b by means of a tool, and the framework oil seal 2a is limited and fixed in the cover body 1a through the first snap spring 3 a.
Compared with the prior art, a sealed lid structure of transmission shaft and axial plunger pump for axial plunger pump has following advantage: (1) the outer side surface of the cover body to the inner side surface of the cover body are sequentially composed of a first mounting pore channel with a larger pore diameter and a second mounting pore channel with a smaller pore diameter, and therefore the first mounting pore channel with the larger pore diameter is arranged on the outer side. When the framework oil seal needs to be disassembled and replaced, the framework oil seal can be pushed out only by disassembling the clamp spring; the whole transmission shaft sealing cover structure is not required to be disassembled, and the whole replacement operation is simple and convenient. (2) When the inner side surface of the framework oil seal is pushed inwards into the sealing cover, the framework oil seal is installed in the forward direction, so that the framework oil seal is uniformly stressed and is not easy to deform and damage, and the leakage of a lubricating medium or air in the pump body is further prevented. (3) Because the lateral surface of skeleton oil blanket supports and leans on first jump ring, can effectively prevent lubricating medium or air from leaking from the gap between jump ring and the skeleton oil blanket, has left out the packing ring simultaneously, reduce cost, and has simplified the sealed lid structure of transmission shaft and installation procedure. Above-mentioned advantage of the sealed lid of transmission shaft helps high-efficient, the steady operation of axial plunger pump.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. A transmission shaft sealing cover structure for an axial plunger pump comprises a cover body, a framework oil seal and a first clamp spring; the cover body is provided with a transmission shaft mounting hole, and the framework oil seal and the first clamp spring are mounted in the transmission shaft mounting hole; the method is characterized in that:
the transmission shaft mounting pore is formed by a first mounting pore with a larger pore diameter and a second mounting pore with a smaller pore diameter from the outer side surface of the cover body to the inner side surface of the cover body in sequence; the framework oil seal is installed in the first installation hole and corresponds to a first clamp spring installation groove is formed in the side wall of the first installation hole of the outer side face of the framework oil seal, and the first clamp spring is installed in the first clamp spring installation groove.
2. The drive shaft seal cover structure for an axial plunger pump according to claim 1, wherein: the outer side surface of the framework oil seal is abutted against the first clamp spring.
3. The drive shaft seal cover structure for an axial plunger pump according to claim 2, wherein: the framework oil seal is an annular body.
4. The drive shaft seal cover structure for an axial plunger pump according to claim 2, wherein: the cover body is an annular body.
5. The drive shaft seal cover structure for an axial plunger pump according to any one of claims 1 to 4, wherein: the cover body is made of rigid material.
6. An axial plunger pump comprises a pump body, wherein a transmission shaft and a transmission shaft sealing cover structure are assembled on the pump body; the method is characterized in that: the drive shaft seal cover structure for the axial plunger pump as recited in any one of claims 1 to 5.
7. The axial plunger pump of claim 6, wherein: the pump body is provided with a first clamp spring mounting groove on the side wall of a sealing cover mounting hole corresponding to the outer side surface of the transmission shaft sealing cover structure, and the first clamp spring is mounted in the first clamp spring mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796191.5U CN209977246U (en) | 2019-05-29 | 2019-05-29 | Transmission shaft sealing cover structure for axial plunger pump and axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796191.5U CN209977246U (en) | 2019-05-29 | 2019-05-29 | Transmission shaft sealing cover structure for axial plunger pump and axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209977246U true CN209977246U (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920796191.5U Active CN209977246U (en) | 2019-05-29 | 2019-05-29 | Transmission shaft sealing cover structure for axial plunger pump and axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209977246U (en) |
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2019
- 2019-05-29 CN CN201920796191.5U patent/CN209977246U/en active Active
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