LT7056B - Hydraulic distributor with smooth screw drive - Google Patents

Abstract

The invention is intended to reduce the vibrations of the hydraulic distributor with a smooth screw drive in the longitudinal direction of the distributor, the pulsations of the fluid flow in the hydraulic system, the consumption of electricity when the distributor body is affected by external vibrations. The main structural elements of a hydraulic distributor with a smooth screw drive are a smooth screw drive and an electric motor. The distributor is designed for use in various types of hydraulic systems, especially when the equipment is exposed to external vibrations, such as mobile equipment and heavy-duty machinery and special vehicles. Due to the high rotation accuracy of the electric motor shaft and the precise movement of the screw mechanism, high accuracy of smooth movement of the distributor in the axial direction of the distributor is achieved. At the same time, no additional fluid flow pulsation occurs in the hydraulic system, which increases the utility, reliability, and efficiency of the hydraulic system.

Description

TECHNICAL FIELD

The object of the invention is a hydraulic distributor with a smooth screw drive, intended for controlling various types of hydraulic systems, especially when external vibrations and at the same time pulsations of the hydraulic fluid appear in the devices, for example, in mobile and heavy-duty machines and special vehicles.

STATE OF THE ART

Polish patent PL210528 describes the use of a screw mechanism to ensure smooth movement of a hydraulic distributor. A screw mechanism is used to ensure a smooth piston-valve connection. Such a connection allows hydraulic fluid to flow through the narrow cavities (channels) of the distributor. The screw mechanism is not used to ensure smooth movement in the housing.

US patent US4493474 describes an electric motor operated hydraulic distributor slide. It is a double-acting slide designed to open or close one cavity (channel). A sliding clamp connecting the motor housing to the rotor is connected to the electric motor shaft. As the shaft of the electric motor rotates, it moves axially in relation to the rotor of the electric motor. At the same time, two cavities (channels) for the flow of hydraulic fluid are opened or opened when the shaft is connected to the fluid.

ESSENCE OF THE INVENTION

The purpose of the invention is a hydraulic distributor with a smooth screw drive to reduce smooth vibrations occurring in the axial direction of the distributor under the influence of various external factors. It also reduces fluid flow pulsations in the hydraulic system, electricity consumption when the distributor body is affected by external vibrations.

In known analogues, the effect of external mechanical vibrations on the distributor housing in the smooth axial direction occurs. In a typical hydraulic distributor that uses an electro-magnetic drive and return springs, vibration of the distributor and thus of the fluid often occurs. Due to vibrations, the stability of the flow of hydraulic fluid through the gap between the distributor body and the slider is not ensured, then the unstable position of the slider, changing (pulsating) performance and pressure of the hydraulic fluid appear.

Based on this invention, a hydraulic distributor with a smooth screw drive is created to reduce undesirable phenomena during its operation. The total energy loss during distributor operation is reduced by 10% thanks to the reduction of hydraulic fluid waste. Fluid throughput through the manifold increases by 5% due to increased fluid flow.

The hydraulic distributor with smooth gear is designed for use in various types of hydraulic systems, especially when the equipment experiences external vibrations, such as mobile equipment and heavy duty machinery and special vehicles. Due to the precision of rotation of the electric motor shaft of the distributor screw drive and the precise movement of the elements of the screw mechanism, high accuracy of smooth linear movement of the distributor is achieved, the electric motor works as a stepping motor, such distributor is intended to be used as a proportional distributor with very high control accuracy.

The main advantage of a hydraulic distributor with a smooth worm drive screw mechanism is that it is self-braking and that there is no smooth axial wobble in the presence of external vibrations acting on the hydraulic distributor housing. This achieves the stability of the operation of the hydraulic distributor, in the absence of smooth vibrations; hydraulic fluid pressure pulsations in the hydraulic system are reduced; the system's usefulness, reliability and efficiency increase.

In a traditional hydraulic distributor, electricity is actively used by an electromagnet in any position of the distributor. An additional advantage of the design of the hydraulic distributor with a smooth screw drive is the saving of electricity, since electricity is used for the motor only when the hydraulic distributor is in the working position.

DESCRIPTION OF THE DRAWINGS fig. Diagram of a hydraulic distributor with a smooth screw drive:

1. Hydraulic distributor housing.

2. Back cover.

3. Cap screws.

4. Carved gasket.

5. Smooth.

6. Front cover.

7. Stator housing.

8. Engine rotor.

9. Engine rotor hollow shaft.

10. Motor stator.

11. Engine rear cover.

12. Cover screws.

13. Locking nut.

14. Gap adjustment nut.

15. Engine side cover.

16. Screws.

17. Bearings.

18. Electrical connection.

19. Connecting screw.

20. Intermediate.

21. Pin.

DESCRIPTION OF IMPLEMENTATION OF THE INVENTION

Structure and principle of operation

The hydraulic distributor with a smooth screw drive consists of a body (1) with a smooth (5), a carved gasket (4), an end cover (2), which is attached to the body (1) with cover screws (3) and has a screw drive consisting of a rotor electric motor (indicated as 7-11 in the diagram) and screw mechanism (indicated in the diagram as non-destructive connection of slider 5 and connecting screw 19). The drive of the screw mechanism consists of a motor stator (10) and a motor rotor (8), which rotates in bearings (17). The main element of the stator is its body (7), to which the front (6) and rear (11) covers of the motor are attached with cover screws (12). The motor stator (10) is inside the stator housing (7), and the electrical connection (18) is outside. The side cover (15) is additionally attached to the rear cover (11) of the electric motor with screws (16), and the front cover (6) has a gasket (20). The motor rotor hollow shaft (9) is connected to the motor rotor (8), gap adjusting nut (14) and lock nut (13). The main element of the hydraulic distributor - smooth (5) - is permanently connected to the connecting screw (19) and the hollow shaft of the motor rotor (9), which performs the functions of a nut. The pin (21) is needed to prevent the grooved gasket (4) from twisting. Rotary electric motor power supply via electrical connector (18).

The power supply to the hydraulic distributor with a smooth screw drive is supplied to switch 18· Then the rotary motion is given to the rotor electric motor (indicated as 7-11 in the diagram), which rotates the switching screw 19 to the slider 5. The slider 5, reducing the pulsations of the hydraulic fluid, distributes the hydraulic fluid of the hydraulic distributor in housing 1, which is then supplied to the hydraulic systems of various devices.

Claims (4)

DEFINITION OF THE INVENTION 1. The hydraulic distributor with smooth screw gear is designed to control hydraulic systems in various types of hydraulic systems, especially when external vibrations occur in the equipment, i.e. i.e. in mobile devices, heavy duty machines and special vehicles, differing in that it includes a hydraulic distributor housing, a slide, an electric motor. 2. Hydraulic distributor with a smooth screw drive, according to point 1, differs in that the smooth screw drive consists of 2 directly connected elements with locking and gap adjustment nuts for non-disruptive hydraulic fluid pulsations and at the same time for reducing vibrations of the hydraulic distributor with a smooth screw drive. 3. A hydraulic distributor with a smooth screw drive according to claim 1, characterized in that the electric motor operates as a stepper motor. 4. A hydraulic distributor with a smooth screw drive, according to points 1-3 b, differing in that the distributor is used as a proportional distributor.