CN216894903U - Semi-seal screw compressor with automatic and continuously adjustable internal volume ratio - Google Patents

Abstract

The utility model belongs to a semi-seal screw compressor with an automatically and continuously adjustable internal volume ratio. The problems to be solved are that the background technology exists: the motor is installed at the air suction side of the compressor, the space is narrow, the design of an inner volume ratio adjusting mechanism is difficult, and the automatic continuous adjustment of an inner volume ratio slide valve cannot be realized due to the on-off of one electromagnetic valve. The key points of the technical scheme adopted for solving the technical problem are as follows: the part A and the part B form a semi-seal screw compressor with a combined structure through the connection between the exhaust end seat and the intermediate body; the inner volume ratio piston cavity is divided into an inner volume ratio piston right cavity and an inner volume ratio piston left cavity by an inner volume ratio piston, and the inner volume ratio load-increasing solenoid valve and the inner volume ratio load-reducing solenoid valve control power oil way are communicated with or cut off from the inner volume ratio piston right cavity and the inner volume ratio piston left cavity. The method is suitable for refrigeration compressor equipment.

Description

Semi-seal screw compressor with automatic and continuously adjustable internal volume ratio

The technical field is as follows: the utility model belongs to the refrigeration technology, and particularly relates to a semi-seal screw compressor with an automatically and continuously adjustable internal volume ratio.

Background art: energy conservation is the first energy source, energy conservation is the main path for realizing carbon neutralization in the future, and the problem of over-compression and under-compression of the screw compressor is solved, namely the realization of the adjustable internal volume ratio of the compressor is an important measure for improving COP. The existing air suction cooling type half-sealed screw compressor or refrigerant liquid spraying cooling type half-sealed screw compressor is characterized in that a motor is installed on the air suction side of the compressor, a transmission shaft of the motor and a transmission shaft of a rotor of the compressor are integrated, in order to reduce the deformation of the transmission shaft of the motor, the gap between a stator of the motor and a rotor of the motor is controlled within a safe range, the space between the tooth forms of the motor and the rotor of the compressor is narrow, the overall dimension of the motor is much larger than the diameter of the rotor of the compressor, the design of an inner volume ratio adjusting mechanism of the half-sealed screw compressor is difficult due to the integration of the factors, and the half-sealed screw compressor with the traditional structure is fixed in inner volume ratio. The structure of the semi-closed screw compressor with the adjustable internal volume ratio can realize manual discontinuous adjustment of the internal volume ratio, but in the hydraulic control scheme, a Vi adjusting piston only has a cavity at the top, the lower part is in tangent plane direct contact with the end face of a Vi sliding valve, a cavity cannot be formed, and the hydraulic oil can not be reliably controlled to enter or exit the cavity only by the connection or disconnection of an electromagnetic valve communicated with the cavity at the top, so that the automatic continuous adjustment of the sliding valve of the internal volume ratio cannot be realized.

The utility model has the following contents: the utility model aims to provide a semi-seal screw compressor with an automatically and continuously adjustable internal volume ratio, which aims to solve the problems in the background art that: the motor is installed on the suction side of the compressor, the space is narrow, the design of the internal volume ratio adjusting mechanism is difficult, and the automatic continuous adjustment of the internal volume ratio slide valve cannot be realized due to the on-off of one electromagnetic valve. The technical scheme for solving the technical problem is as follows: a semi-hermetic screw compressor with an automatically and continuously adjustable internal volume ratio, the part A comprises: the middle partition plate divides the inner cavity of the oil cylinder body into an energy adjusting piston cavity and an inner volume ratio piston cavity, the oil cylinder body is provided with an energy adjusting electromagnetic valve, an air suction end seat is arranged between the oil cylinder body and the engine body, an inner volume ratio piston of the inner volume ratio piston cavity is connected with an inner volume ratio slide valve through an inner volume ratio guide rod, the inner volume ratio slide valve slides in a cavity communicated with the air suction end seat and the engine body, the engine body is connected with an exhaust end seat, the energy adjusting piston of the energy adjusting piston cavity is connected with the energy adjusting slide valve through an energy adjusting guide rod, and the energy adjusting slide valve slides in the cavity communicated with the engine body and the exhaust end seat; the part B comprises: the rotor is connected with a motor shaft through a coupler, the motor rotor, the motor stator and the motor shaft are arranged in the motor shell, the two sides of the intermediate body are connected with the exhaust end base and the motor shell to form a sealing structure, and the junction box is arranged on the intermediate body or the motor shell; the method is characterized in that: the part A and the part B form a semi-seal screw compressor with a combined structure through the connection between the exhaust end seat and the intermediate body; the oil cylinder body is provided with an internal volume ratio load-increasing electromagnetic valve and an internal volume ratio load-reducing electromagnetic valve; the inner volume ratio piston cavity is divided into an inner volume ratio piston right cavity and an inner volume ratio piston left cavity by an inner volume ratio piston, and the inner volume ratio load-increasing solenoid valve and the inner volume ratio load-reducing solenoid valve control power oil way are communicated with or cut off from the inner volume ratio piston right cavity and the inner volume ratio piston left cavity. The positions and/or the number of the oil holes corresponding to the internal volume ratio load-increasing electromagnetic valve and the internal volume ratio load-reducing electromagnetic valve are/is changed, so that the step adjustment of the internal volume ratio is realized. The internal volume ratio load-increasing solenoid valve and the internal volume ratio load-reducing solenoid valve are communicated with the internal volume ratio piston cavity through a pipeline.

Compared with the prior art, the utility model has the advantages that: due to the adoption of the technical scheme, on one hand, the mounting position of the motor in the part B is at one end of the semi-closed screw compressor, and the junction box, the exhaust end and the motor form a closed area, so that a semi-closed structure is realized, and a mounting space is reserved for the part A; on the other hand, the part A has enough space for installing an internal volume ratio load-increasing electromagnetic valve and an internal volume ratio load-decreasing electromagnetic valve, the internal volume ratio load-decreasing electromagnetic valve in the part A is electrified, the power oil is injected into the right cavity of the internal volume ratio piston, the power oil in the left cavity of the internal volume ratio piston is discharged, the internal volume ratio piston is pushed and drives the internal volume ratio slide valve to move leftwards through the internal volume ratio guide rod, the internal volume ratio is reduced, the internal volume ratio load-increasing electromagnetic valve is electrified, the power oil is injected into the left cavity of the internal volume ratio piston, the power oil in the right cavity of the internal volume ratio piston is discharged, the internal volume ratio piston is pushed and drives the internal volume ratio slide valve to move rightwards through the internal volume ratio guide rod, the internal volume ratio is increased, the internal volume ratio is automatically and continuously adjustable, and the problems of over-compression and under-compression of the screw compressor are solved. On the other hand, the part A and the part B form a combined structure through the connection between the exhaust end seat and the intermediate body, the organic combination of the part A and the part B is formed, the part A and the part B are scientifically matched and complement each other, and the combined structure has the advantages of automatic and continuous adjustment of the internal volume ratio of the part A and the semi-closed structure of the part B, and generates an excellent combined effect.

Description of the drawings: FIG. 1 is a schematic of the present invention.

The specific implementation mode is as follows:

example 1: referring to fig. 1, a semi-hermetic screw compressor with an automatically and continuously adjustable internal volume ratio, part a includes: the middle partition plate 21 divides the inner cavity of the oil cylinder body 1 into an energy adjusting piston cavity and an inner volume ratio piston cavity, the oil cylinder body 1 is provided with an energy adjusting electromagnetic valve 22, a suction end seat 18 is arranged between the oil cylinder body 1 and the engine body 6, an inner volume ratio piston 3 of the inner volume ratio piston cavity is connected with an inner volume ratio slide valve 5 through an inner volume ratio guide rod 4, the inner volume ratio slide valve 5 slides in a cavity formed by communicating the suction end seat 18 and the engine body 6, the engine body 6 is connected with an exhaust end seat 7, an energy adjusting piston 2 of the energy adjusting piston cavity is connected with an energy adjusting slide valve 16 through an energy adjusting guide rod 17, and the energy adjusting slide valve 16 slides in the cavity formed by communicating the engine body 6 and the exhaust end seat 7; the part B comprises: the rotor 8 is connected with a motor shaft 13 through a coupler 9, a motor rotor 14, a motor stator 15 and the motor shaft 13 are arranged in a motor shell 12, two sides of an intermediate body 10 are connected with an exhaust end seat 7 and the motor shell 12 to form a sealing structure, and a junction box 11 is arranged on the intermediate body 10 or the motor shell 12; the method is characterized in that: the part A and the part B form a semi-closed screw compressor with a combined structure through the connection between the exhaust end seat 7 and the intermediate body 10; the oil cylinder body 1 is provided with an internal volume ratio load-increasing electromagnetic valve 19 and an internal volume ratio load-reducing electromagnetic valve 20; the internal volume ratio piston cavity is divided into an internal volume ratio piston right cavity and an internal volume ratio piston left cavity by the internal volume ratio piston 3, and the internal volume ratio load-increasing solenoid valve 19 and the internal volume ratio load-decreasing solenoid valve 20 control the connection or disconnection of the power oil path with the internal volume ratio piston right cavity and the internal volume ratio piston left cavity. The positions and/or the number of the oil holes corresponding to the internal volume ratio load-increasing electromagnetic valve 19 and the internal volume ratio load-reducing electromagnetic valve 20 are/is changed, so that the step adjustment of the internal volume ratio is realized. The internal volume ratio load-increasing solenoid valve 19 and the internal volume ratio load-decreasing solenoid valve 20 may be connected to the internal volume ratio piston chamber through a pipe.

Claims (3)

1. A semi-hermetic screw compressor with an automatically and continuously adjustable internal volume ratio, the part A comprises: the energy-saving cylinder comprises an oil cylinder body (1), an intermediate partition plate (21), an energy adjusting piston cavity and an internal volume ratio piston cavity, wherein an energy adjusting electromagnetic valve (22) is arranged on the oil cylinder body (1), an air suction end seat (18) is arranged between the oil cylinder body (1) and a cylinder body (6), an internal volume ratio piston (3) of the internal volume ratio piston cavity is connected with an internal volume ratio sliding valve (5) through an internal volume ratio guide rod (4), the internal volume ratio sliding valve (5) slides in a cavity formed by communicating the air suction end seat (18) with the cylinder body (6), the cylinder body (6) is connected with an exhaust end seat (7), an energy adjusting piston (2) of the energy adjusting piston cavity is connected with the energy adjusting sliding valve (16) through an energy adjusting guide rod (17), and the energy adjusting sliding valve (16) slides in the cavity formed by communicating the cylinder body (6) with the exhaust end seat (7); the part B comprises: the rotor (8) is connected with the motor shaft (13) through the coupler (9), the motor rotor (14), the motor stator (15) and the motor shaft (13) are arranged in the motor casing (12), the two sides of the intermediate body (10) are connected with the exhaust end base (7) and the motor casing (12) to form a sealing structure, and the junction box (11) is arranged on the intermediate body (10) or the motor casing (12); the method is characterized in that: the part A and the part B form a semi-hermetic screw compressor with a combined structure through the connection between the exhaust end seat (7) and the intermediate body (10); an internal volume ratio load-increasing electromagnetic valve (19) and an internal volume ratio load-reducing electromagnetic valve (20) are arranged on the oil cylinder body (1); the inner volume ratio piston cavity is divided into an inner volume ratio piston right cavity and an inner volume ratio piston left cavity by an inner volume ratio piston (3), and the power oil path is controlled to be communicated or disconnected with the inner volume ratio piston right cavity and the inner volume ratio piston left cavity by an inner volume ratio load-increasing electromagnetic valve (19) and an inner volume ratio load-reducing electromagnetic valve (20).

2. The semi-hermetic screw compressor with the internal volume ratio automatically and continuously adjustable according to claim 1, wherein: the positions and/or the number of the corresponding oil holes of the internal volume ratio load-increasing electromagnetic valve (19) and the internal volume ratio load-reducing electromagnetic valve (20) are/is changed, so that the step adjustment of the internal volume ratio is realized.

3. The semi-hermetic screw compressor with automatically and continuously adjustable internal volume ratio as claimed in claim 1 or 2, wherein: the internal volume ratio load-increasing solenoid valve (19) and the internal volume ratio load-reducing solenoid valve (20) are communicated with the internal volume ratio piston cavity through a pipeline.

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