Slide valve device capable of adjusting position of air supply port in compressor

Abstract

The utility model relates to a slide valve device capable of adjusting the position of an air supply port in a compressor. An air suction port, an exhaust port and a rotor cavity are arranged on a compressor body, an air supply slide valve and a rotor in the compressor are both positioned in the rotor cavity, and the compressor is characterized in that an air supply groove is arranged at the bottom of the air supply slide valve, an air supply port is arranged at the top of the air supply slide valve, and an air supply channel is further arranged on the compressor body. The outlet of the air supply channel, the air supply groove, the air supply port and the rotor cavity are communicated in sequence; an air supply oil cylinder cavity is formed in the compressor body, an air supply oil piston is installed in the air supply oil cylinder cavity, and the two ends of an air supply sliding valve rod are fixed to an air supply sliding valve and the air supply oil piston respectively. In the whole stroke range of the air supply slide valve, the air supply groove covers the outlet of the air supply channel all the time. The utility model has the advantages of simple structure, reasonable design and convenience in use.

Description

Technical Field

[0001] This utility model relates to a slide valve device with an adjustable air inlet position in a compressor, belonging to the field of compressor technology, and is mainly applied in screw compressors. Background Technology

[0002] The optimal location of the compressor's air inlet varies depending on the displacement load. If the compressor's air inlet is fixed, its performance will decrease after air replenishment during partial load operation. In some cases, air replenishment during partial load operation may even encroach on the suction volume, preventing air replenishment and thus limiting the compressor's performance.

[0003] The slide valve in a compressor is mainly used to regulate the compressor's discharge volume by changing the volume of the compression chamber, thereby adjusting the compression ratio. The air inlet in a compressor is mainly used to supply air to the compression chamber. Currently, the position of the air inlet in commonly used compressors is fixed, and the slide valve typically does not have the function of adjusting the position of the compressor's air inlet.

[0004] While some compressors now have adjustable air inlets, this significantly increases the compressor's structural complexity. Currently, there is no simple, adjustable air inlet valve device for the compressor. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings in the prior art and to provide a slide valve device for adjusting the position of the air inlet in a compressor that is simple in structure, reasonable in design, and easy to use.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: the adjustable air inlet position slide valve device in the compressor has an air intake port, an air exhaust port and a rotor cavity on the compressor body. The air inlet slide valve and the rotor in the compressor are both located in the rotor cavity. Its structural features are: the bottom of the air inlet slide valve is provided with an air inlet groove, the top of the air inlet slide valve is provided with an air inlet, and an air inlet channel is also provided on the compressor body. The outlet of the air inlet channel, the air inlet groove, the air inlet and the rotor cavity are connected in sequence; an air inlet cylinder cavity is provided in the compressor body, and an air inlet piston is installed in the air inlet cylinder cavity. The two ends of the air inlet slide valve rod are respectively fixed on the air inlet slide valve and the air inlet piston; throughout the entire stroke range of the air inlet slide valve, the air inlet groove always covers the outlet of the air inlet channel.

[0007] Preferably, the inlet of the gas replenishment channel of this utility model is located on the outer surface of the compressor body, and a gas replenishment port is provided at the inlet of the gas replenishment channel.

[0008] Preferably, the air inlet on the air replenishment valve of this utility model is a circular through hole.

[0009] Preferably, the present invention has multiple oil holes on the wall of the air-filling cylinder cavity for inlet or outlet of oil to drive the air-filling piston to move.

[0010] Preferably, the air replenishment valve stem of this utility model has a columnar structure.

[0011] Compared with the prior art, this utility model has the following advantages and effects: by moving the air replenishment slide valve to change the position of the air replenishment port, full-load air replenishment can be achieved; only one additional air replenishment slide valve and its adjustment device are needed, and the added air replenishment cylinder structure can share the control system and part of the oil circuit with the original slide valve loading and unloading cylinder, effectively controlling costs while flexibly changing the position of the air replenishment port; the capacity adjustment and air replenishment functions are separated and do not affect each other, improving reliability.

[0012] The gas replenishment method of this invention can effectively increase the cooling capacity of the compressor while consuming less power, thus achieving higher efficiency. Both full load and partial load require gas replenishment, and the appropriate gas replenishment port locations differ for each. If the gas replenishment port is fixed, it cannot simultaneously meet the gas replenishment needs under all operating conditions. This invention effectively solves this technical problem with a simple structure. The mobile gas replenishment method of this invention can solve this technical problem, achieving gas replenishment under all operating conditions and effectively improving the compressor's performance under partial load. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the drawings used in the description of the embodiments and / or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main structure of the compressor in an embodiment of this utility model.

[0015] Figure 2 yes Figure 1 A top-view structural diagram.

[0016] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the AA plane.

[0017] Figure 4 yes Figure 1 A schematic diagram of the rear view structure.

[0018] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle BB plane.

[0019] Figure 6 This is a three-dimensional structural diagram of the compressor in an embodiment of this utility model.

[0020] Figure 7 This is a three-dimensional structural schematic diagram of the compressor from another perspective in an embodiment of this utility model.

[0021] In the diagram: 1-Inlet; 2-Outlet; 3-Compressor body; 4-Injection valve; 5-Injection channel; 6-Injection valve rod; 7-Injection oil piston; 8-Injection oil cylinder cavity; 9-Injection port; 10-Injection port; 11-Injection groove; 12-Rotor. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0023] Example

[0024] See Figures 1 to 7 In this embodiment, the adjustable air inlet position slide valve device in the compressor has an air inlet 1, an air outlet 2 and a rotor cavity on the compressor body 3. The air inlet slide valve 4 and the rotor 12 in the compressor are both located in the rotor cavity.

[0025] In this embodiment, the bottom of the air supply slide valve 4 is provided with an air supply groove 11, and the top of the air supply slide valve 4 is provided with an air supply port 10, which is a circular through hole. An air supply channel 5 is also provided on the compressor body 3, and the outlet of the air supply channel 5, the air supply groove 11, the air supply port 10 and the rotor cavity are connected in sequence.

[0026] In this embodiment, a gas-replenishing cylinder cavity 8 is provided inside the compressor body 3, and a gas-replenishing piston 7 is installed inside the gas-replenishing cylinder cavity 8. The gas-replenishing slide valve rod 6 has a columnar structure, and its two ends are fixed on the gas-replenishing slide valve 4 and the gas-replenishing piston 7, respectively, and can move axially. Throughout the entire stroke range of the gas-replenishing slide valve 4, the gas-replenishing groove 11 always covers the outlet of the gas-replenishing channel 5.

[0027] In this embodiment, the inlet of the gas supply channel 5 is located on the outer surface of the compressor body 3. A gas supply port 9 is provided at the inlet of the gas supply channel 5, through which the working fluid can enter the compressor. Multiple oil holes are provided on the wall of the gas supply cylinder cavity 8 for moving the gas supply oil piston 7 by inlet or outlet of oil, allowing the refrigerant oil used in the compressor to flow through the oil holes.

[0028] The operation process of the slide valve device in this embodiment is as follows:

[0029] a. The compressor starts running, and the working fluid enters the compressor from the suction port 1 and is then compressed inside the compressor.

[0030] b. The working fluid can also enter the compressor from the gas supply port 9, flow through the gas supply channel 5 to the gas supply slide valve 4, and then enter the rotor cavity for compression.

[0031] c. When the compressor is loading or unloading, the oil circuit is opened and closed by controlling the solenoid valve of the compressor, changing the oil pressure on both sides of the gas-oil piston 7, causing the gas-oil piston 7 to move, which in turn drives the gas-oil slide valve 4 to move, thereby realizing loading or unloading.

[0032] d. An oil hole is opened in the cylinder cavity 8 for replenishing air. Under the action of oil pressure, the replenishing air piston 7 will move, which will drive the replenishing air slide valve 4 to move, thereby changing the position of the replenishing air port 10.

[0033] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A slide valve device with adjustable port position for a compressor, provided with a suction port (1), a discharge port (2) and a rotor cavity in a compressor body (3), a compressor ported slide valve (4) and a rotor (12) are located in the rotor cavity, characterized in that: The bottom of the air replenishment slide valve (4) is provided with an air replenishment groove (11), and the top of the air replenishment slide valve (4) is provided with an air replenishment port (10). An air replenishment channel (5) is also provided on the compressor body (3). The outlet of the air replenishment channel (5), the air replenishment groove (11), the air replenishment port (10) and the rotor cavity are connected in sequence. An air replenishment cylinder cavity (8) is provided inside the compressor body (3). An air replenishment piston (7) is installed inside the air replenishment cylinder cavity (8). The two ends of the air replenishment slide valve rod (6) are fixed on the air replenishment slide valve (4) and the air replenishment piston (7) respectively. Throughout the entire stroke range of the air replenishment slide valve (4), the air replenishment groove (11) always covers the outlet of the air replenishment channel (5).

2. A slide valve arrangement for a compressor having an adjustable port position according to claim 1, characterized in that: The inlet of the gas supply channel (5) is located on the outer surface of the compressor body (3), and a gas supply port (9) is provided at the inlet of the gas supply channel (5).

3. A slide valve arrangement for a compressor having an adjustable port position according to claim 1, characterized in that: The air inlet (10) on the air replenishment valve (4) is a circular through hole.

4. A slide valve arrangement for a compressor having an adjustable port position according to claim 1, characterized in that: Multiple oil holes are provided on the wall of the air-filling cylinder cavity (8) for oil inlet or outlet to push the air-filling piston (7) to move.

5. A slide valve arrangement for a compressor having an adjustable port position according to claim 1, wherein: The air replenishment valve stem (6) has a columnar structure.

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