RU2116513C1 - Geared hydraulic machine with intermediate bodies - Google Patents

Abstract

FIELD: hydraulic motors or hydraulic pumps for multipurpose hydraulic systems. SUBSTANCE: planet- gear hydraulic machine has out-of-round sun gears 1,5, planet pinions 8, and two end plates 7 with channels 12 for working fluid inlet and outlet. Teeth on sun gears 1,5 are made in the form of intermediate bodies, such as rollers 2,6, held in position on sun gears 1,5 by means of separators. The latter are combined with end plates 7 at sun gear 1 for external engagement. Separators are provided with seats for intermediate bodies. All teeth are equally shaped. EFFECT: simplified design and reduced manufacturing cost. 2 cl, 2 dwg

Description

 The invention relates to gear hydraulic machines and can be used in hydraulic systems for various purposes as a pump or hydraulic motor.

 Known gear hydraulic machine [1], containing a housing in the inner cavity of which are installed with the possibility of rotation of two non-circular (oval) wheels. When the drive wheel rotates, for example, in pump mode, it periodically cuts off and empties a certain volume enclosed between the inner circular cylinder of the housing and the oval wheel. Two such volumes will be cut off in one revolution by each of the wheels, therefore, four such volumes will be cut off in one cycle. The specified hydraulic machine, having a number of advantages, at the same time contains disadvantages associated with the complexity of the design and diverse teeth.

 Known gear hydraulic machine [2] of the planetary type, containing non-circular sun wheels with internal and external teeth and satellites associated with the sun wheels. The inlet and outlet channels of the working fluid are placed on the end cap. The space between two adjacent satellites and the sun wheels serves as a working cavity. The device in engine mode with a stationary sun wheel with internal teeth works as follows. The working fluid, cyclically getting under pressure through the inlet channels into the working cavity and exerting influence on the parts framing it, expands the volume of the working cavity. As a result of the expansion of the working cavity, the sun wheel rotates with external teeth.

 Mentioned gear hydraulic machine, having the best energy performance, is characterized by the presence of wheels with complex centroids and diverse teeth, which creates difficulties in manufacturing.

 The objective of the invention is to simplify the design and reduce manufacturing costs.

 This problem is solved in that in a planetary gear hydraulic machine containing non-circular sun wheels for internal and external engagement, satellites and two end caps with channels for supplying and discharging the working fluid, the teeth on the sun wheels are made in the form of intermediate bodies, for example, rollers mounted on wheels with separators. On the sun wheel for internal engagement, the separators are aligned with the end caps, and for the other sun wheel the separators are two cylindrical disks fixed to the specified wheel, and the separator disks are rotatably placed in cylindrical recesses ("pockets") on the end caps for sealing a working cavity formed by a pair of neighboring satellites and solar wheels.

 In FIG. 1 shows a general view of a gear hydraulic machine with intermediate bodies and a section BB in FIG. 2, in FIG. 2 is a section AA in FIG. one.

 The device consists of a non-circular sun wheel 1 for external gearing, which with rollers 2, with two cylindrical disks 3 and shaft 4 are integrated into a single unit as an assembly unit; non-circular sun wheel 5 for internal engagement with rollers 6 and two end caps 7, combined with cages for rollers 6; satellites 8 (for simplicity, only two are shown) mated to the sun wheels 1 and 5 via rollers 2 and 6; covers 9 (Fig. 2) with fittings 10 for supplying a working fluid. The rollers 2 and 6 are mounted on the sun wheels 1 and 5 using the sockets 11 (Fig. 2) provided on the cylindrical disks 3, the end caps 7 and on the sunniest wheels 1 and 5. In addition, the channels 12 are located on the end caps 7 ( Fig. 1) supply of a working fluid. An annular groove 13 (Fig. 2) is made on each cover 9 to combine channels 12. The space enclosed between two adjacent satellites 8, sun wheels 1 and 5 with rollers 2 and 6, as well as disks 3 and end covers 7, is a working cavity 14 (Fig. 1). The disks 3 are placed in cylindrical recesses 15 (Fig. 2) on the end caps 7 with the possibility of rotation to seal the working cavity 14. The entire assembly along the perimeter is tightened with bolts 16 (Fig. 2) and nuts 17.

 The operation of the gear hydraulic machine with intermediate bodies in engine mode with the stationary sun wheel 5 is as follows.

 In the active travel zone, when the supply channels 12 are not blocked by satellites 8, the working fluid from the high-pressure line through the nozzle 10 (shown by arrow F), the annular groove 13 and the supply channels 12 enters the working cavity 14. In this case, the satellites 8 interacting with the rollers 2 and 6, create a moment that drives the sun wheel 1 with the shaft 4 (the direction of rotation is indicated by arrow F). In addition, as a result of the direct action of the working fluid on the sun wheel 1, an additional driving moment arises, which coincides with the previous one, since the vector of the resulting force passes outside the axis of rotation of the shaft 4. With further rotation of the sun wheel 1 with the shaft 4, the supply channel 12 is blocked by the satellite 8 and the phase of the active course ends. After that, the working cavity 14 is connected to the low-pressure line through the exhaust channel 12 (shown by a dashed line), which until now has been blocked by satellite 8. As a result, the working fluid is withdrawn. Then comes the active phase, etc. The described work process is performed by each pair of satellites 8 (the number of satellites in this design is 10) and therefore the driving moment on the shaft 4 is total.

 Changing the direction of rotation of the shaft 4 is carried out by switching channels 12 (fittings 10) in the high and low pressure lines.

Based on the proposed device made a prototype with the following parameters:
1. The number of satellites is 10.

 2. The number of teeth of the satellite is 10.

 3. The diameter of the initial circumference of the satellite, mm, - 16.6.

 4. The width of the satellite, mm, - 10.

 5. The diameter of the roller, mm, - 3.

 6. The number of rollers on solar wheels is 44 and 66.

 7. The outer diameter of the hydraulic machine, mm - 125.

 Estimated data and laboratory tests showed that the use of rollers as teeth does not violate the gearing of the wheels. When the working fluid was supplied with a pressure of 10 MPa, the maximum moment measured on the output shaft turned out to be no less than 75 N • m, and the moment pulsation at low revs and without additional flywheel was no more than 5%.

 Sources of information.

 1. Yudin E.M. Gear pumps. The main parameters and their calculation. - M.: Mechanical Engineering, 1964, p. 236.

 2. RU, Patent N 1403993, cl. F 03 C 2/22, publ. 1988.

Claims (2)

 1. A planetary gear hydraulic machine containing non-circular sun wheels for internal and external engagement and associated satellites, an end cover, characterized in that the teeth on the sun wheels are made in the form of intermediate bodies, for example rollers, mounted on wheels with separators equipped with sockets for intermediate bodies, moreover, on the sun wheel for internal gearing, the separators are combined with end caps, and on the sun wheel for external gearing, the separators are two cylindrical disc fixedly connected to said wheel and placed rotatably in a cylindrical recess in the end caps.  2. The hydraulic machine according to claim 1, characterized in that the channels for supplying and discharging the working fluid are made on two end caps.

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