CN205101168U - Sea water axial piston motor - Google Patents

Abstract

The utility model discloses a seawater axial plunger motor, which comprises a shell with a cavity, an end cover and other basic structures, and also includes an angular support bearing installed on the cylinder shaft at the lower part of the swash plate, and the return plate is located on the angular support bearing. On the outside, the sliding shoes are distributed along the circumferential direction of the return plate, and the cylinder body is connected to the housing through a large bearing outside the cylinder; the cylinder body shaft is sleeved with a first spring and a second spring, wherein the first spring passes through the first spring seat, the corner support The bearings and return plate hold the shoe against the swash plate, and a second spring holds the floating plate against the port plate assembly. In the seawater axial plunger motor disclosed in the utility model, the cylinder shaft is connected with the casing through a large bearing outside the cylinder, which can effectively solve the problem of friction loss generated when the cylinder shaft rotates in the casing. A first spring and a second spring are sheathed on the shaft of the cylinder body, and the two sets of springs form the upper and lower ends facing each other, which enhances the sealing performance of the entire structure.

Description

A Seawater Axial Piston Motor

technical field

The invention relates to the field of hydraulic components, in particular to a seawater axial piston motor in the field.

Background technique

Piston pumps and motors are commonly used power conversion components in hydraulic systems. How to solve the friction loss generated when the cylinder shaft rotates in the housing and the compact sealing of the internal mechanical structure of the plunger pump is a major problem in the design of plunger pumps in the prior art. Common problems in pumps and motors, Chinese utility model patent CN203098171U discloses a swash plate type seawater plunger pump with embedded sliding bearings, which discloses that a spring is pressed between the cylinder body and the floating liner, and the floating liner Closely attached to the valve plate, the cylinder body and the housing are connected by an external sliding bearing to provide support for the front section of the cylinder body, the cylinder body and the rear end cover are connected by an embedded sliding bearing, and the shaft of the embedded sliding bearing runs through the valve plate , The floating liner is only on the right side of the cylinder to provide support for the cylinder. The technology disclosed in this patent is provided with multiple sets of sliding bearings, and due to difficulties such as machining accuracy, the installed spring may not be able to push up and down at the same time, which will affect the sealing of the overall structure.

Contents of the invention

The technical problem to be solved by the present invention is to provide a seawater axial plunger motor that can effectively solve the problem of friction loss generated when the cylinder shaft rotates in the casing.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A seawater axial plunger motor, comprising a housing with a cavity, the two ends of the housing are respectively provided with a small end cover and an end cover, the cylinder shaft passes through the small end cover, the housing and the end cover in turn, and the housing passes through the The positioning pin is positioned with the swash plate and the end cover, and the three are fixedly connected by screws and spring washers. The cylinder body is set inside the housing as a rotating part, and the cylinder body is uniformly distributed with plunger holes in the circumferential direction. The plug hole is clearance fit, the angular support bearing is installed on the cylinder shaft under the swash plate, the return plate is located outside the angular support bearing, the sliding shoes are distributed along the circumferential direction of the return plate, one side of the sliding shoe is in contact with the swash plate, and the concave surface formed on the other side is in contact with the The plunger head in the plunger hole is hinged, the distribution plate assembly is fixedly connected to the end cover by screws, and a floating plate is set on the flow plate assembly, and there is a floating sleeve assembly corresponding to the plunger hole on the floating plate. The bearing is connected with the shell; the first spring and the second spring are sleeved on the shaft of the cylinder body, wherein the first spring makes the sliding shoe close to the swash plate through the first spring seat, angular support bearing and return plate, and the second spring makes the floating The disc compresses the valve plate assembly.

Further, a mechanical seal is provided between the cylinder shaft and the small end cover.

Further, a sealing ring is provided between the housing and the end cover.

Further, a sealing ring is provided between the casing and the swash plate.

Further, the part where the shaft of the cylinder block is in contact with the swash plate is connected through a sliding bearing.

Further, a leakage port and an inlet and outlet are provided on the end cover.

The beneficial effects of the present invention are:

In the seawater axial plunger motor disclosed in the present invention, the cylinder shaft is connected to the housing through a large bearing outside the cylinder, which can effectively solve the problem of friction loss generated when the cylinder shaft rotates in the housing. A first spring and a second spring are sleeved on the shaft of the cylinder body, wherein the first spring presses the sliding shoe on the slope of the swash plate through the first spring seat, and the second spring presses the floating plate on the distribution plate assembly. Finally, it is tightly combined with the bottom end cover, and the two sets of springs form the upper and lower ends of the top, which solves the problem that one end of a spring may be tilted or uneven when the upper and lower ends are tightened due to insufficient processing accuracy, and enhances the integrity of the entire structure. Sealing performance. The cylinder shaft of the seawater axial plunger motor disclosed by the present invention adopts angular support bearings instead of conventional specially processed spherical joints on the cylinder shaft, has the same function, strong versatility, and is easy to install.

Description of drawings

Fig. 1 is a structural schematic diagram of a seawater axial piston motor disclosed in Embodiment 1 of the present invention;

FIG. 2 is a bottom view of the seawater axial piston motor of FIG. 1 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. For the convenience of description below, the bottom and top mentioned in each embodiment refer to the position of each component in the drawings, which do not limit the protection scope of the patent right.

Embodiment 1, as shown in Figures 1 and 2, the seawater axial piston motor disclosed in this embodiment includes a housing 15 with a cavity, a small end cover 3 is provided at the top end of the housing, and an end cover is provided at the bottom end of the housing 24. The cylinder shaft 2 passes through the small end cover 3, the housing 15 and the end cover 24 in turn. The swash plate and the small end cover are fixedly connected by cross countersunk screws 6. The housing 15 is connected to the swash plate 9 through the positioning pin 10. After positioning with the end cover 24, the three are fixedly connected by the hexagon socket head cap screw 7 and the spring washer. The cylinder body 1 is set inside the housing 15 as a rotating part. The hole is matched with the plunger hole, and the angular support bearing 14 is installed on the cylinder shaft at the lower part of the swash plate 9. The return plate 13 is located outside the angular support bearing 14. The sliding shoes 8 are distributed along the circumferential direction of the return plate 13. One side of the sliding shoe 8 Contact with the swash plate 9, the concave surface formed on the other side is hinged with the plunger head in the plunger hole, the distribution plate assembly 23 is fixedly connected with the end cover 24 through the screw 25, the floating plate 22 is set on the distribution plate assembly 23, the floating plate 22 There is a floating sleeve assembly 21 corresponding to the plunger hole, and the cylinder body 1 is connected with the housing 15 through a large sliding bearing 17 outside the cylinder; the cylinder shaft 1 is sleeved with a first spring 19 and a second spring 20, wherein the first The spring 19 makes the sliding shoe 8 close to the swash plate 9 through the first spring seat 16 , the corner bearing 14 and the return plate 13 , and the second spring 20 makes the floating plate 22 press the distribution plate assembly 23 .

As an alternative, in this embodiment, a mechanical seal 4 is provided between the cylinder shaft 2 and the small end cover 3 to seal the two.

As an alternative, a sealing ring 5 is provided between the housing 15 and the end cover 24 in this embodiment.

As an alternative, a sealing ring 5 is provided between the housing 15 and the swash plate 9 in this embodiment.

As an alternative, the portion of the cylinder shaft 2 in contact with the swash plate 9 is connected through a sliding bearing 12 .

As an alternative, the plunger ball head is injection molded.

As shown in FIG. 2 , a leakage port 11 and an inlet and outlet 26 are also provided on the end cap.

The working principle of the seawater axial plunger motor disclosed in this embodiment is: external power makes the cylinder shaft rotate, and the cylinder shaft drives the sliding shoe to slide and rotate along the swash plate through the angular support bearing and the return plate, and the plunger assembly also rotates on the swash plate. The space between the disc and the floating disc is driven by the sliding shoe to slide and rotate along the swash plate. When the sliding shoe slides from the lower limit position of the swash plate to the upper limit position, the plunger assembly is in the water absorption stroke, the closed volume in the plunger assembly increases, the water pressure decreases, and sea water enters the plunger assembly from the inlet to realize the water absorption process; When the shoe slides from the upper limit position of the swash plate to the lower limit position, the plunger assembly is in the water press stroke, the closed volume in the plunger assembly decreases, the water pressure increases, and seawater flows out of the plunger assembly from the outlet to realize the water pressurization process. When the cylinder shaft drives the plunger assembly to slide and rotate a circle along the swash plate, the plunger assembly absorbs water and presses water once, and as the cylinder shaft continues to rotate, the plunger assembly also completes the action of absorbing water and pressing water continuously, thereby realizing the plunger motor. function.

In the seawater axial plunger motor disclosed in this embodiment, the cylinder shaft is connected to the casing through a large bearing outside the cylinder, which can effectively solve the problem of friction loss generated when the cylinder shaft rotates in the casing. A first spring and a second spring are sleeved on the shaft of the cylinder body, wherein the first spring presses the sliding shoe on the slope of the swash plate through the first spring seat, and the second spring presses the floating plate on the distribution plate assembly. Finally, it is tightly combined with the bottom end cover, and the two sets of springs form the upper and lower ends of the top, which enhances the sealing performance of the entire structure.

Claims (7)

1. A seawater axial piston motor, comprising a housing with a cavity, a small end cover and an end cover are respectively arranged at both ends of the housing, and the axis of the cylinder body passes through the small end cover, the housing and the end cover in sequence, and the housing The body is positioned with the swash plate and the end cover through the positioning pin, and the three are fixedly connected by the screw and the spring washer. The cylinder body is set inside the casing as a rotating part, and the cylinder body is uniformly distributed around the plunger hole, and the plunger is located in the plunger hole. It is matched with the plunger hole clearance, and it is characterized in that: angular support bearing is installed on the cylinder shaft at the lower part of the swash plate, the return plate is located outside the angular support bearing, the sliding shoes are distributed along the circumferential direction of the return plate, and one side of the sliding shoe is in contact with the swash plate. The concave surface formed on the other side is hinged with the plunger head in the plunger hole. The distribution plate assembly is fixedly connected with the end cover through screws. The distribution plate assembly is provided with a floating plate, and there is a floating sleeve assembly corresponding to the plunger hole on the floating plate. The cylinder body is connected to the shell through the large bearing outside the cylinder; the cylinder shaft is sleeved with a first spring and a second spring, wherein the first spring makes the sliding shoe close to the swash plate through the first spring seat, angular support bearing and return plate , the second spring makes the floating plate press the valve plate assembly. 2. The seawater axial piston motor according to claim 1, characterized in that a mechanical seal is provided between the cylinder shaft and the small end cover. 3. The seawater axial piston motor according to claim 1, characterized in that a sealing ring is provided between the casing and the end cover. 4. The seawater axial piston motor according to claim 1, characterized in that a sealing ring is provided between the casing and the swash plate. 5. The seawater axial piston motor according to claim 1, characterized in that: the part of the cylinder shaft in contact with the swash plate is connected by a sliding bearing. 6. The seawater axial piston motor according to claim 1, characterized in that: a leakage port and an inlet and outlet are provided on the end cover. 7. The seawater axial piston motor according to claim 1, characterized in that the head of the plunger is an injection molding structure.