CN105332871B - Decentralized cup-shaped cylinder and swash plate axial piston pump supported by rolling bearings - Google Patents

Abstract

A swash plate axial piston pump supported by a decentralized cup-shaped cylinder and rolling bearings, including a drive shaft, the left and right ends of the drive shaft are installed on the left and right end covers, the left and right end covers are fixed with the casing, and the drive The right side of the middle part of the shaft is connected with the swash plate, the left end surface of the swash plate is connected with several plungers through a ball joint, the right end surface of the swash plate is fixed on the fixed swash plate through rolling bearings, and the fixed swash plate is fixed on the right end cover; the drive shaft The left side of the middle part of the oil cup is connected to the oil cup mounting plate, the left side of the oil cup mounting plate is connected to the flow distribution component, and the right side of the oil cup mounting plate is installed with several oil cups through the connecting piece, the oil cup is connected with the sliding end of the plunger, and the swash plate It is in contact with the support block of the swash plate, and the oil cup mounting plate and the oil cup pressing plate are in contact. The two ends of the spring are respectively connected to the oil cup pressing plate and the swash plate supporting block. Cooperate with the flow distribution mechanism to realize the oil suction and oil discharge of the pump, which has the advantages of compact structure and reliable transmission.

Description

Decentralized cup-shaped cylinder and swash plate axial piston pump supported by rolling bearings

technical field

The invention belongs to the technical field of plunger pumps, in particular to a swash plate axial plunger pump supported by a distributed cup-shaped cylinder body and rolling bearings.

Background technique

At present, the common swash plate axial piston pump is generally composed of cylinder block, plunger, swash plate, transmission shaft, etc. During the operation of the pump, due to the friction between the sliding shoe and the swash plate, energy loss will be caused. , and due to the relative sliding between the sliding shoe and the swash plate, it is easy to cause the wearing of the sliding shoe, resulting in the failure of the sliding shoe and reducing the reliability of the pump.

In the traditional floating cup plunger pump, the floating cup is in a floating state, which is easy to cause leakage under high pressure, which improves the material performance requirements and processing requirements, and there is a certain angle between the floating cup and the transmission shaft, and there is a large gap during the rotation process. vibration.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a swash plate axial piston pump supported by a distributed cup-shaped cylinder and rolling bearings, which can reduce the vibration of the cylinder and avoid the gap between the swash plate and the sliding shoe. between friction.

In order to achieve the above object, the present invention takes the following technical solutions:

A swash plate axial piston pump supported by a distributed cup-shaped cylinder and rolling bearings, including a drive shaft 18, the left and right ends of the drive shaft 18 are installed on the left end cover 3 and the left end cover 3 through the first bearing 2 and the second bearing 16 respectively. On the right end cover 14, the left end cover 3, the right end cover 14 and the housing 5 are fixed together, and the first sealing end cover 1 and the second sealing end cover 17 are respectively installed on the outside of the left end cover 3 and the right end cover 14, and the drive shaft 18 The right side of the middle part is connected with the swash plate 12, the left end surface of the swash plate 12 is connected with several plungers 10 through a ball joint, the right end surface of the swash plate 12 is installed on the rolling bearing 13, and the rolling bearing 13 is fixed on the fixed swash plate 15, 15 is fixed on the right end cover 14; the left side of the middle part of the drive shaft 18 is connected with the oil cup mounting plate 6, the left side of the oil cup mounting plate 6 is connected with the distribution assembly 4, and the right side of the oil cup mounting plate 6 is installed with several connectors 19 The oil cup 8, the oil cup 8 is connected with the sliding end of the plunger 10, the swash plate 12 is in contact with the swash plate support block 11, the oil cup mounting plate 6 is in contact with the oil cup pressing plate 7, and the two ends of the spring 9 are respectively connected to the The oil cup pressing plate 7 and the swash plate support block 11 keep the swash plate 12 parallel to the fixed swash plate 15 .

The drive shaft 18 is connected with the swash plate 12 through an arc-shaped spline, and the drive shaft 18 is connected with the oil cup mounting plate 6 through a spline.

The beneficial effects of the present invention are: the drive shaft 18 can realize the same phase rotation of the swash plate 12 and the oil cup mounting plate 6 during the rotation of the drive shaft, reducing the friction between the plunger 10 and the cylinder block; 10 forms a cavity that can change periodically, cancels the original plunger pump cylinder, reduces the mass of the rotating parts, and reduces the moment of inertia; the swash plate 12 is pressed on the rolling bearing 13 by the spring 9 and the swash plate support block 11 , the use of rolling bearings can cancel the friction of the sliding shoes on the swash plate of ordinary swash plate axial piston pumps, which improves the reliability of the pump.

Description of drawings

Fig. 1 is the overall structure diagram of the present invention.

Figure 2 is a schematic structural view of the drive shaft.

Fig. 3 is a schematic diagram of the structure of the swash plate device for installing the plunger.

Figure 4 is a schematic diagram of the installation of the oil cup and the distribution plate.

Fig. 5 is a schematic diagram of the plunger structure.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a swash plate axial piston pump supported by a distributed cup-shaped cylinder and rolling bearings includes a drive shaft 18, and the left and right ends of the drive shaft 18 are respectively Installed on the left end cover 3 and the right end cover 14 through the first bearing 2 and the second bearing 16, the left end cover 3, the right end cover 14 and the shell 5 are fixed together by threads, and the outer sides of the left end cover 3 and the right end cover 14 are installed respectively The first sealing end cover 1 and the second sealing end cover 17, the middle right side of the driving shaft 18 is connected with the swash plate 12 through a drum spline, and the left end surface of the swash plate 12 is connected with several plungers 10 through a ball joint, and the swash plate The right end surface of 12 is installed on the rolling bearing 13, and the rolling bearing 13 is fixed on the swash plate 15, and the swash plate 15 is fixed on the right end cover 14 through threads; , the left side of the oil cup mounting plate 6 is connected with the flow distribution assembly 4, and the right side of the oil cup mounting plate 6 is installed with several oil cups 8 through the connecting piece 19, the oil cup 8 is connected with the sliding end of the plunger 10, the swash plate 12 is connected with the inclined The disc support block 11 is in contact, the oil cup mounting plate 6 is in contact with the oil cup pressing plate 7, and the two ends of the spring 9 are respectively connected to the oil cup pressing plate 7 and the swash plate support block 11, so that the swash plate 12 and the fixed swash plate 15 stays parallel.

The working principle of the present invention is: the prime mover drives the drive shaft 18 to rotate, and the drive shaft 18 can simultaneously drive the oil cup mounting plate 6 and the swash plate 12 to rotate, and the spring 9 presses the swash plate support block 11 on the swash plate 12 to make the swash plate The disc 12 is closely attached to the bearing 13. When the drive shaft 18 rotates, it can drive the plunger 10 to rotate together with the swash plate 12 and the oil cup 8. The plunger 10 will produce axial displacement in the oil cup 8, thereby realizing periodic changes in the cavity. , cooperate with the flow pipe on the flow distribution assembly 4 to realize the oil suction and oil discharge of the pump.

Claims (1)

1. the cam-type axial piston pump of a kind of distributing cup-shaped cylinder body and roller bearings, including a drive shaft (18), Drive shaft (18) left and right ends are arranged on left end cap (3) and right end cap by clutch shaft bearing (2) and second bearing (16) respectively (14) on, left end cap (3), right end cap (14) are fixed together with shell (5), in the outside of left end cap (3), right end cap (14) point First end cover (1) and the second end cover (17) are not installed, it is characterised in that：On the right side of the middle part of drive shaft (18) and tiltedly Disk (12) is connected, and the left side of swash plate (12) is connected with several plungers (10) by ball pivot, and the right side of swash plate (12) is arranged on On rolling bearing (13), rolling bearing (13), which is fixed on, to be determined on swash plate (15), is determined swash plate (15) and is fixed on right end cap (14)；Drive It is connected, is connected on the left of lubricating cup installing plate (6) with flow component (4), lubricating cup with lubricating cup installing plate (6) on the left of the middle part of moving axis (18) Several lubricating cups (8) are provided with by connector (19) on the right side of installing plate (6), lubricating cup (8) is connected with the sliding end of plunger (10), Swash plate (12) is contacted with swash plate support block (11), lubricating cup installing plate (6) and lubricating cup pressure strip (7) contact, the two ends point of spring (9) It is not connected on lubricating cup pressure strip (7) and swash plate support block (11), makes swash plate (12) and determine swash plate (15) keeping parallelism；

Described drive shaft (18) is connected by the spline of arc-shaped with swash plate (12), and drive shaft (18) passes through spline and oil Cup installing plate (6) connection.