BG66952B1 - Hydraulic lift with kinetic energy battery - Google Patents

Abstract

The invention relates to a hydraulic lift which will find wide application both in the construction of residential and office buildings and in electric electric fork lift truck, in which the cage and the load move together, with significantly reduced energy and operating costs. The hydraulic lift with a kinetic energy battery consists of an lift well (0), a cage (1), mechanically connected to a hydraulic cylinder (2), hydraulically connected by an automatic throttle (3) to a controllable hydraulic motor-pump (5). The controllable hydraulic motor-pump (5) is mechanically connected to both the electric motor (11) by means of a permanently engaged clutch (6) and a controllable clutch (7) and to a kinetic energy battery (12) by means of the permanently engaged clutch (6), toothed gear (9) and a controllable clutch (8) or with a kinetic energy battery (14) by means of the engaged clutch (6), the toothed gear (9), the controllable clutch (8) and the positive gearing (13). The control unit (4) is electrically connected to the automatic throttle (3), to the adjustable hydraulic motor-pump (5), to the controllable clutches (7 and 8) and to a speed converter (10), mechanically connected to the kinetic energy battery (12 or 14).

Description

Field of technology

The invention relates to a hydraulic elevator, which will find wide application in the construction of residential and office buildings, with significantly reduced energy consumption (up to 25% depending on the mode of operation).

BACKGROUND OF THE INVENTION

Since the end of the last century, hydraulic elevators are increasingly used for transporting people and goods in high office or residential buildings due to their number of advantages over those with electromechanical drive, mainly related to the absence of drums, ropes, mechanical brakes, gearboxes. , counterweights, etc.

The classic hydraulic elevators [1], [2], [3] are of different types by purpose (passenger, freight-passenger and freight), by load capacity (varying from 300 to 15,000 kg). All of them usually contain an electric motor, a volumetric hydraulic pump, a hydraulic cylinder (cylinders), a microprocessor control unit, pipelines, an elevator shaft, a cabin (s) and safety systems.

The lifting of the cab is at the expense of the energy of the compressed fluid (oil). The pressure and flow of the fluid is realized by a volumetric pump (piston or gear), driven by an electric motor. The lowering of the elevator cage is at the expense of gravitational forces, and its speed is regulated by throttling the fluid, controlled by the microprocessor control unit, whereby the potential energy is dissipated in the surrounding space. The positioning of the desired floors is performed with the same devices and systems.

A device utilizing the potential energy during descent is known [4], comprising a hydraulic cylinder, powering and reducing modules and a control unit. The supply module consists of an electric motor mechanically connected to a hydraulic pump, which is hydraulically connected to the hydraulic cylinder by means of a regulating hydraulic valve and a locking hydraulic valve. The reduction module, hydraulically connected to the hydraulic cylinder by means of a blocking hydraulic valve, consists of a hydraulic motor mechanically connected by means of a gear with a generator and a accumulator battery. The presence of a power supply and reduction module leads to duplication of elements, which complicates the product, and the double conversion of energy in the reduction module from hydraulic to mechanical and subsequently from mechanical to electrical degrades the efficiency of the device.

Technical essence of the invention

The object of the invention is to provide a hydraulic elevator with lower energy and operating costs.

The problem is solved by means of a hydraulic cylinder hydraulically connected through an automatic throttle with an adjustable hydraulic motor-pump, mechanically connected by means of a permanently engaged clutch and a controllable clutch with an electric motor. According to the invention, the adjustable hydraulic motor-pump is also mechanically connected to a kinetic energy accumulator by means of a gear and a second steerable clutch, or by means of a gear, a second steerable clutch and a booster gear. The control unit is electrically connected to the automatic throttle and the adjustable hydraulic motor-pump, and the condition of the kinetic energy accumulator is monitored by a speed receiver electrically connected to the control unit.

Advantages of the hydraulic elevator solution are the improved energy efficiency due to the smaller number of energy conversions from one type to another, due to the use of a kinetic accumulator for storage of potential energy during descent and the increased reliability due to the smaller number of elements and the possibilities of the kinetic energy accumulator for an unlimited number of charge and discharge cycles compared to the capabilities of the battery.

Explanation of the attached figure

An exemplary embodiment of the invention is shown in the attached figure 1, representing a schematic diagram of a hydraulic elevator.

Descriptions of granted patents for inventions

Example of embodiment of the invention № 09.2 / 30.09.2019

The hydraulic lift with kinetic energy accumulator according to the invention consists of a cabin 1 moving in an elevator shaft 0 and mechanically connected to a hydraulic cylinder 2, the hydraulic cylinder 2 being hydraulically connected by an automatic throttle 3 to an adjustable hydraulic motor pump 5. Regu motor-pump 5 is mechanically connected both to the electric motor 11 by means of a permanently engaged clutch 6 and a steerable clutch 7, and to a kinetic energy accumulator 12 by a permanently engaged clutch 6, gear 9 and a steerable clutch 8, or to a kinetic energy accumulator 14 via the permanently engaged clutch 6, the gear 9, the steered clutch 8 and the upshift 13. The automatic throttle 3, the adjustable hydraulic motor-pump 5 and the condition of the steerable clutches 7 and 8 are controlled by a control unit 4 which monitors the condition of the kinetic accumulator of energy 12 or 14 by means of a speed converter 10.

When the elevator is initially actuated, the movement is transmitted from the electric motor 11 through the engaged control clutch 7 and the permanently engaged clutch 6, where the adjustable hydraulic motor-pump 5 operates in pump mode, which supplies fluid with appropriate flow and pressure to the cylinder 2. , through which the cab 1 is driven, i.e. the existing principle of operation of the known hydraulic elevators is preserved.

At the first downward movement of the cabin 1, the fluid (oil) from the hydraulic cylinder 2 through the open automatic throttle 3 with appropriate flow and pressure enters the adjustable hydraulic motor-pump 5, which operates in motor mode according to the algorithm ωώ = + A = const, at signal defined by the speed converter 10 and implemented by the control unit 4, which ensures a constant speed of downward movement of the cab 1. The electric motor lie separated from the system when the control clutch 7 is off and the energy from the motor pump 5 is transmitted through the engaged clutch 8 and the gear 9, in which the kinetic energy accumulator 12 or the kinetic energy accumulator 14 is charged with energy by means of the engaged clutch 8, the gear 9 and the increasing gear 13. When the speed of the kinetic energy accumulator 12 or 14 above a certain threshold, the control unit 4 switches off the control clutch 8 and the speed of the cab 1 is regulated. from the automatic choke 3.

In the subsequent upward movement of the cab 1, the adjustable hydraulic motor-pump 5 operates in pump mode and two operating modes are possible.

1. Sequential mode.

In this mode of operation, the energy flow to the adjustable hydraulic motor-pump 5 comes initially from the kinetic energy accumulator 12 through the included control clutch 8, the gear 9 and the engaged clutch 6, or from the kinetic energy accumulator 14 through the included clutch 8, the gear 9 and the upshift 13, and then when the control clutch 8 is disconnected from the electric motor 11 through the control clutch 7 and the clutch 6 is engaged, while the flywheel speed is continuously monitored by the control unit 4.

2. Parallel mode.

In this mode of operation, the energy flow to the adjustable hydraulic motor pump 5 is provided simultaneously by the motor 11 through the included clutch 6 and controllable clutch 7 and by the kinetic energy accumulator 12 through the included controllable clutch 8, gear 9 and engaged clutch 6, or from the kinetic energy accumulator 14 through the engaged clutch 8, the gear 9 and the increasing gear 13.

Regardless of the mode of upward movement of the cab 1, the control unit 4 monitors the energy state of the kinetic energy accumulator 12, or 14, by means of the speed converter 10, controlling the adjustable hydraulic motor pump according to the algorithm ωώ = - А ₂ = const in order to realization of a constant speed of movement of the cabin 1. When lowering the speed of the kinetic energy accumulator 12 or 14 below a certain threshold, the control unit 4 turns off the control clutch 8 and the speed of the cabin 1 is regulated by the automatic throttle 3.

Claims (1)

1. Hydraulic elevator is a kinetic energy accumulator consisting of a cabin (1) located in an elevator shaft (0) and driven by a hydraulic cylinder (2), the elevator shaft (0) and the base of the cabin (1) are connected, characterized The fact that the hydraulic cylinder (2) is connected is a controllable hydraulic motor-pump (5) through an automatic and controllable throttle (3), controlled by a microprocessor system (4), and the controlled hydraulic motor-pump (5) by means of a permanent engaged clutch (6), is connected in parallel is an electric motor (11) through a controllable clutch (7) and is a first flywheel (12), or a second flywheel (14) and an upshift (13), through a controllable clutch (8) and a gear (9), the speed of the flywheel (12) or the flywheel (14) is monitored by the microprocessor system (4) by means of a speed converter (10).