CN105351203A - Compressor - Google Patents

Abstract

The purpose of the present invention is to provide a compressor, which mainly solves the problem that the lubricating oil in the gap space formed between the support seat and the auxiliary bearing of the existing compressor cannot be drained in time, resulting in excessive temperature and affecting the reliability and power consumption of the compressor. technical problem. The compressor includes a compression mechanism, a displacement rotor pump for supplying oil to the lubricating oil circulation circuit of the compressor, and a drive shaft for driving the compression mechanism and the displacement rotor pump. The bearing is rotatably arranged in the support seat, and a gap space is formed between the support seat, the drive shaft and the auxiliary bearing. The positive displacement rotor pump is provided with a connecting channel, and the gap space is connected to the oil suction chamber and/or oil suction chamber of the positive displacement rotor pump through the connecting channel. Channels, so that the lubricating oil in the gap space can be passed into the lubricating oil circulation circuit of the compressor to circulate, so as to realize timely oil drainage in the gap space and avoid the high temperature of the lubricating oil in the gap space from affecting the reliability of the compressor.

Description

a compressor

technical field

The invention relates to the field of compressors, in particular to a compressor lubricated by a displacement rotor pump.

Background technique

In existing scroll compressors, sliding or rolling bearings are installed in the lower support base to support the rotation of the drive shaft. In order to provide lubrication and cooling conditions for the bearings in the lower support base, it is necessary to supply oil to the lower support bearing. Insufficient oil or too high temperature will aggravate the wear between the drive shaft and the bearing and affect the life of the compressor. In the existing technical solutions, an oil hole is usually opened in the matching section between the drive shaft and the bearing to communicate with the main oil circuit of the drive shaft, and a part of the lubricating oil entering the main oil circuit of the crankshaft from the bottom of the compressor through the oil pump structure enters the lower support seat. This effectively lubricates the lower support bearings. The lower end of the lower support seat is generally equipped with an oil pump or a thrust limit structure, so that a closed gap space is formed between the bearing, the drive shaft and the bearing seat of the lower bracket, and a lubricating oil accumulation storage oil pool is formed. The oil temperature in the oil pool gradually rises because the lubricating oil has been accumulated here and cannot take away the frictional heat between the bearing and the crankshaft. The lubricating effect of the lubricating oil decreases due to the temperature rise, resulting in more frictional heat, and for rolling bearings Generally speaking, immersing it in lubricating oil will increase the power consumption of the friction pair. In the long run, it will have a great impact on the reliability and power consumption of the compressor, and it is easy to cause bearing burnout and abnormal power consumption of the compressor.

Aiming at this problem, for example, the prior art patent CN103486046A has a partial solution, which guides the lubricating oil accumulated in the space of the lower support seat to the oil pool at the bottom of the compressor by opening an oil guide groove on the lower end surface of the support seat. However, as shown in the patent feature, the oil guide groove needs to be set on the lower end surface of the lower support seat. When the liquid level of the oil pool at the bottom of the compressor is higher than the lower end surface of the lower support seat, the oil guide groove with the structure described in the patent can only move the oil in the lower support seat. The lubricating oil drains to the same height as the bottom oil pool liquid level, that is, if the height of the oil pool at the bottom of the compressor is higher than the installation height of the bearing in the lower support seat during the operation of the compressor, the lower support seat with a guide groove structure The accumulated oil will still accumulate in the lower support seat all the time, and it will not be able to drain the oil in time.

In view of the above problems, it is urgent to provide a new compressor to solve the problem in the prior art that the lubricating oil in the gap space formed between the lower support seat and the auxiliary bearing cannot be drained in time, resulting in excessive temperature and affecting the compressor. Reliability and Power Consumption Issues

Contents of the invention

In view of this, the present invention provides a compressor with good reliability that the lubricating oil in the clearance space formed between the support base and the auxiliary bearing can be drained in time.

For reaching this purpose, the present invention adopts following technical scheme:

A compressor comprising a compression mechanism, a displacement rotor pump for supplying oil to a lubricating oil circulation circuit of the compressor, and a drive shaft for driving the compression mechanism and the displacement rotor pump, the drive The end of the shaft away from the compression mechanism is rotatably set in the support seat through the auxiliary bearing. There is a clearance space between the support seat and the auxiliary bearing. A connecting channel is provided in the positive displacement rotor pump, and the clearance space passes through The connecting channel is connected to the oil suction cavity and/or the oil suction channel of the displacement rotor pump.

Preferably, the positive displacement rotor pump includes a closed accommodation chamber and a rotor disposed in the accommodation chamber, the oil suction chamber is formed by the cooperation of the rotor and the inner wall of the accommodation chamber, and the drive shaft is provided with There is an eccentric shaft eccentric to the axis of the drive shaft, the eccentric shaft is connected to the rotor, and is used to drive the rotor to orbit around the drive shaft while rotating around the eccentric shaft;

The connecting channel is arranged on the cavity wall of the accommodating cavity.

Preferably, the positive displacement rotor pump further includes a base fixed on the support seat and an oil pump cylinder fixedly arranged in the base, and the base and the oil pump cylinder form an accommodating cavity with an open end;

It also includes a sealing cover plate, one side of the sealing cover plate seals the opening of the accommodating cavity, and the other side is opposite to the end surface of the drive shaft and the gap space between the drive shaft and the support seat, so The eccentric shaft and the rotor are rotatably arranged on the sealing cover plate.

Preferably, at least one first through hole is provided on the sealing cover plate at a position corresponding to the oil suction chamber, and the first through hole communicates with the oil suction chamber and the gap space.

Preferably, a confluence groove is provided on the surface of the sealing cover plate opposite to the gap space, for converging the lubricating oil in the gap space to the first through hole.

Preferably, the confluence groove includes an annular groove and a plurality of radial grooves communicating with the annular groove and diverging radially outward, and the first through hole is located on the annular groove.

Preferably, at least one oil-suction through hole is opened in the axial direction on the base, and the oil-suction through-hole connects the oil pool of the compressor with the oil-suction chamber;

The connecting channel is opened on the sealing cover plate and the base, one end of the connecting channel is connected to the gap space, and the other end is connected to the oil suction through hole.

Preferably, the connection channel includes a second through hole opened on the sealing cover plate, a straight hole provided on the base and corresponding to the position of the second through hole, and a second through hole opened in the oil suction through hole. A third through hole on the outer wall, the side wall of the third through hole communicates with the straight hole.

Preferably, the diameter of the third through hole increases gradually toward the oil suction through hole.

Preferably, the third through hole is arranged obliquely relative to the axis of the base.

Preferably, a plug is provided on the end of the third through hole away from the oil suction through hole.

Preferably, the drive shaft is provided with a main oil hole extending along its axial direction, and an auxiliary bearing oil hole is also provided, one end of the auxiliary bearing oil hole is connected to the main oil hole, and the other end is connected to the auxiliary bearing place.

Preferably, the positive displacement rotor pump is a gear pump.

The beneficial effects of the present invention are:

The compressor provided by the present invention is provided with a connecting passage in the positive displacement rotor pump, and the gap space between the support seat and the auxiliary bearing can be connected to the oil suction chamber and/or oil suction passage of the positive displacement rotor pump through the connecting passage, so that the gap can be The lubricating oil in the space is passed into the lubricating oil circulation circuit of the compressor to circulate, so as to realize the timely oil drainage in the gap space and avoid the high temperature of the lubricating oil in the gap space from affecting the reliability of the compressor.

Description of drawings

Through the following description of the embodiments of the present invention with reference to the accompanying drawings, the above and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:

Fig. 1 is a partial structural sectional view of a compressor provided by Embodiment 1 of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is one of the schematic diagrams of the cooperative structure of the compressor gear and the oil pump cylinder provided by Embodiment 1 of the present invention;

Fig. 4 is the second schematic diagram of the cooperative structure of the compressor gear and the oil pump cylinder provided by the first embodiment of the present invention;

Fig. 5 is a schematic diagram of the position of the first through hole opened on the sealing cover provided by Embodiment 1 of the present invention;

Fig. 6 is a top view of the sealing cover plate provided by Embodiment 1 of the present invention;

Fig. 7 is a structural cross-sectional view at the gear pump of the compressor provided by Embodiment 2 of the present invention;

Fig. 8 is a cross-sectional view of a base provided in Embodiment 2 of the present invention;

Fig. 9 is a cross-sectional view of another form of base provided by Embodiment 2 of the present invention;

Fig. 10 is a cross-sectional view of another form of base provided by Embodiment 2 of the present invention.

In the figure, 1. Shell; 2. Lower cover; 3. Drive shaft; 31. Main oil hole; 32. Auxiliary bearing oil hole; 4. Support seat; 5. Auxiliary bearing; 6. Oil pool; 7. Clearance space ; 8, accommodation cavity; 81, oil suction cavity; 9, gear rotor; 91, gear rotor dedendum circle; 10, eccentric shaft; 11, base; 111, oil suction through hole; 112, oil discharge groove; , third through hole; 12, oil pump filter screen; 13, bolt; 14, oil pump cylinder block; 141, internal gear dedendum circle; 15, sealing cover plate; 151, first through hole; 152, annular groove; 153 , a radial groove; 154, a second through hole; 155, a protrusion; 16, a threaded sealing plug.

detailed description

The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. To avoid obscuring the essence of the present invention, well-known methods, procedures, procedures, and components have not been described in detail.

The present invention provides a compressor comprising a compression mechanism, a displacement rotor pump for supplying oil to a lubricating oil circulation circuit of the compressor, and a drive shaft for driving the compression mechanism and the displacement rotor pump. The end of the drive shaft away from the compression mechanism is rotated in the support seat through the auxiliary bearing. There is a clearance space between the support seat and the auxiliary bearing. There is a connecting channel in the positive displacement rotor pump, and the clearance space is connected to the positive displacement rotor pump through the connecting channel. Oil suction chamber and/or oil suction channel, so that the lubricating oil in the gap space can be circulated into the lubricating oil circulation circuit of the compressor, so as to realize timely oil drainage in the gap space, and avoid the excessive temperature of the lubricating oil in the gap space from affecting the performance of the compressor. reliability.

Embodiment one:

An embodiment of the compressor of the present invention will be described below with reference to FIGS. 1 to 6 .

As shown in FIG. 1 , the compressor includes a casing 1 with upper and lower ends open, and an upper cover (not shown in the figure) and a lower cover 2 closing the upper and lower ends of the casing 1 . The "up" and "down" mentioned in this article refer to the positional relationship of the compressor during normal operation. The housing 1 is provided with a compression mechanism (not shown in the figure), a displacement rotor pump for supplying oil to the lubricating oil circulation circuit of the compressor, and a drive shaft 3 for driving the compression mechanism and the displacement rotor pump. The lubricating oil in the oil pool 6 at the bottom of the compressor is delivered to each friction pair of the compressor by a positive displacement rotor pump for lubrication. In this embodiment, the positive displacement rotor pump is a gear pump, of course, other pumps that change the volume of the rotor accommodation cavity through the rotation of the rotor to realize oil suction and oil discharge are also available.

The compression mechanism is similar to the existing compressor, and the oil pumping process of the gear pump is also similar to the prior art, which will not be repeated here.

The drive shaft 3 rotates under the drive of the motor rotor, thereby driving the compression mechanism to perform air compression. Both the upper part and the lower part of the housing 1 are fixedly provided with support bases 4 , both ends of the drive shaft 3 are supported in the housing 1 through the support bases 4 , and the gear pump is installed on the lower surface of the support base 4 . As shown in FIG. 1 , the lower end of the drive shaft 3 is rotatably arranged in the support seat 4 via the auxiliary bearing 5 . The drive shaft 3 is provided with a main oil hole 31 extending in its axial direction, and an auxiliary bearing oil hole 32 is also provided. One end of the auxiliary bearing oil hole 32 is connected to the main oil hole 31 , and the other end leads to the auxiliary bearing 5 . The drive shaft 3 rotates under the drive of the motor rotor, drives the gear pump to pump the lubricating oil in the oil pool 6 at the bottom of the compressor into the main oil hole 31, and then enters the auxiliary bearing 5 through the auxiliary bearing oil hole 32 for lubrication. As shown in Figure 2, a gap space 7 is formed between the drive shaft 3, the support seat 4, and the auxiliary bearing 5. In the prior art, the gap space 7 is airtight, and the lubricating oil in it cannot be discharged in time, which will cause friction. The friction heat generated by the side cannot be taken away by the circulating lubricating oil. If things go on like this, the oil temperature in the gap space 7 will gradually rise and then burn out the auxiliary bearing 5. The frictional resistance with the drive shaft 3 is intensified, and the frictional heat is more, thereby further aggravating the rise of the oil temperature. In order to solve the aforementioned problems, in this embodiment, a connecting passage is provided in the gear pump, through which the lubricating oil in the gap space 7 is introduced into the lubricating oil circulation circuit of the compressor for circulation.

Specifically, the gear pump includes a closed housing chamber 8 and a gear rotor 9 disposed in the housing chamber 8 . An internal gear is disposed on the inner peripheral wall of the housing chamber 8 , and an oil suction chamber 81 is formed by cooperating with the gear rotor 9 and the internal gear. The drive shaft 3 is provided with an eccentric shaft 10 that is eccentric to the axis of the drive shaft 3, and the eccentric shaft 10 is connected to the gear rotor 9 for driving the gear rotor 9 to orbit around the drive shaft 3. At the same time, the gear rotor 9 is in contact with the internal gear Under the meshing action of the eccentric shaft 10, it rotates around the center to complete the oil suction and oil discharge process. The connecting channel is arranged on the cavity wall of the accommodation cavity 8 .

Further, a base 11 is provided on the lower part of the support base 4 , and the base 11 is fixed on the support base 4 . Preferably, the base 11 is covered with an oil pump filter 12 , and the oil pump filter 12 and the base 11 are fixed on the support base 4 by bolts 13 . The base 11 is provided with a hollow oil pump cylinder 14 , and the base 11 and the oil pump cylinder 14 enclose an accommodating cavity 8 with an upper end opening, and the opening of the accommodating cavity 8 is closed by a sealing cover 15 . Preferably, the sealing cover plate 15 is cold pressed or riveted into the base 11 . One side of the sealing cover plate 15 closes the opening of the housing chamber 8, and the other side is opposite to the lower end surface of the drive shaft 3 and the gap space 7. The eccentric shaft 10 and the gear rotor 9 are rotatably arranged on the sealing cover plate 15 and the gear rotor 9 It extends into the accommodation cavity 8 through the sealing cover plate 15 .

The base 11 is provided with an oil suction through hole 111 extending in the axial direction, through which the lubricating oil in the oil pool is sucked into the oil suction chamber 81 . An oil discharge groove 112 is arranged on the upper surface of the base 11, and the oil discharge groove 112 can communicate with the accommodating chamber 8 and the main oil hole 31, so that when the gear pump drains oil, lubricating oil enters the main oil hole 31 through the oil discharge groove 112.

A first through hole 151 is provided at a position corresponding to the oil suction chamber 81 on the sealing cover plate 15, through which the oil suction chamber 81 and the gap space 7 are connected. The lubricating oil in the oil pool 6 is sucked into the oil suction chamber 81, and at the same time, the lubricating oil in the gap space 7 is sucked into the oil suction chamber 81 through the first through hole 151, mixed with the lubricating oil from the oil pool 6, and then input into the main oil hole 31, Finally, it is used to lubricate the friction pairs of various parts of the compressor, so that the lubricating oil in the gap space 7 will form a continuous oil supply and oil discharge. Since the discharge of the lubricating oil in the gap space 7 is completed by the oil suction of the gear pump, as long as the compressor is running, the oil suction action can be carried out actively, and has nothing to do with the liquid level of the oil pool 6 in the compressor. Specifically, as shown in Figures 3 and 4, when the gear rotor 9 rotates counterclockwise relative to the internal gear of the oil pump cylinder 14, an oil suction cavity 81 is formed between the gear rotor 9 and the internal gear, and the position of point B in Figure 3 is The limit sealing point of gear pump oil suction engagement, point C in Figure 4 is the limit sealing point of gear pump oil discharge engagement, as shown in Figure 5, the maximum limit area of the oil suction chamber is point B, point C and the gear rotor root circle 91, The area enclosed by the dedendum circle 141 of the internal gear is the shaded area. In order to enable the lubricating oil in the clearance space 7 to enter the oil suction chamber 81 through the first through hole 151, the projection of the first through hole 151 needs to fall in the above shaded area, such as the D position, E position and F position in Fig. 5 . The first through holes 151 can be opened at different positions as required, as long as the above requirements are met. In order to ensure that the first through hole 151 is set at the correct position, a positioning structure is provided between the sealing cover plate 15 and the base 11, for example, a protrusion 155 is provided radially outwardly on the outer periphery of the sealing cover plate 15, A groove is provided at a corresponding position of the base 11 , and the protrusion 155 cooperates with the groove so as to realize the positioning of the sealing cover 15 .

Further, since the gap between the sealing cover plate 15 and the end face of the drive shaft 3 is very small, in order to reduce the flow resistance of the lubricating oil here, as shown in Figure 6, on the sealing cover plate 15 opposite to the gap space 7 One side is provided with a confluence groove for converging the lubricating oil in the gap space 7 to the first through hole 151 . As a preferred embodiment, the confluence groove includes an annular groove 152 and a plurality of radial grooves 153 communicating with the annular groove 152 and diverging radially outward. The number of radial grooves 153 is not limited. There are four embodiments, which can also be set according to actual needs. The first through hole 151 is located on the annular groove 152 . Of course, the structure of the confluence groove is not limited to the above structure, and other structures that can reduce the resistance of lubricating oil and confluence the lubricating oil to the first through hole 151 are all available.

Embodiment two:

This embodiment provides a compressor, the structure of which is basically the same as that of the compressor described in Embodiment 1, including a shell with upper and lower ends open, and an upper cover and a lower cover that close the upper and lower ends of the shell. The casing is provided with a compression mechanism, a gear pump for supplying oil to the lubricating oil circulation circuit of the compressor, and a drive shaft for driving the compression mechanism and the gear pump. Both the upper part and the lower part in the housing are fixedly provided with support seats. As shown in FIG. The drive shaft 3 is provided with a main oil hole 31 extending in its axial direction, and an auxiliary bearing oil hole, one end of the auxiliary bearing oil hole is connected to the main oil hole 31, and the other end leads to the auxiliary bearing 5. A gap space 7 is formed between the drive shaft 3 , the support base 4 and the auxiliary bearing 5 . The lower part of the support base 4 is provided with a base 11, and the base 11 is provided with a hollow oil pump cylinder 14, and the accommodation chamber 8 with an upper end opening is surrounded by the base 11 and the oil pump cylinder 14, and the opening of the accommodation chamber 8 is closed by a sealing cover plate 15 . The drive shaft 3 is provided with an eccentric shaft 10 that is eccentric to the axis of the drive shaft 3, and the eccentric shaft 10 is connected to the gear rotor 9 for driving the gear rotor 9 to orbit around the drive shaft 3. At the same time, the gear rotor 9 is in contact with the internal gear Rotate around the eccentric shaft 10 under the meshing action. The eccentric shaft 10 and the gear rotor 9 are rotatably arranged on the sealing cover plate 15 , and the gear rotor 9 extends into the accommodating chamber 8 through the sealing cover plate 15 . The base 11 is provided with an oil suction through hole 111 extending in the axial direction, through which the lubricating oil in the oil pool is sucked into the oil suction chamber 81 . An oil discharge groove 112 is arranged on the upper surface of the base 11, and the oil discharge groove 112 can communicate with the accommodating chamber 8 and the main oil hole 31, so that when the gear pump drains oil, lubricating oil enters the main oil hole 31 through the oil discharge groove 112.

The difference is that the gap space 7 in this embodiment communicates with the oil suction channel of the gear pump through the connecting channel. The connecting channel is opened on the sealing cover plate 15 and the base 11 , one end of the connecting channel is connected to the gap space 7 , and the other end is connected to the oil suction through hole 111 . Specifically, the connection channel includes a second through hole 154 opened on the sealing cover plate 15, a straight hole 113 provided on the base 11 and corresponding to the position of the second through hole 154, and a first hole 113 opened on the outer wall of the oil suction through hole 111. Three through holes 114 , the side wall of the third through hole 114 communicates with the straight hole 113 . The lubricating oil in the gap space 7 enters the oil-suction through-hole 111 through the second through hole 154 , the straight hole 113 and the third through-hole 114 sequentially, and then enters the oil-suction chamber 81 to mix with the lubricating oil from the oil pool. Compared with the first embodiment, this embodiment reduces the requirement on the position of the through hole on the sealing cover plate 15 .

The third through hole 114 can be set as a cylindrical through hole with a horizontal axis as shown in FIG. During the position of the three through holes 114, the lubricating oil flowing in through the third through hole 114 accepts the lubricating oil in the gap space 7 conveyed by the straight hole 113 on the one hand, and accepts the lubricating oil from the oil pool on the other hand. The area of the oil suction port at the end of the oil pool, but weakens the pumping capacity of the lubricating oil in the gap space 7, which may cause the flow of lubricating oil entering the gap space 7 to be larger than the flow of lubricating oil flowing out. With the gradual accumulation of lubricating oil , it is possible to cause the gap space 7 to still be full of lubricating oil. Therefore, preferably, a plug is provided on the end of the third through hole 114 away from the oil suction through hole 111 , and further, the plug is preferably a threaded sealing plug 16 .

Of course, the third through hole 114 is not limited to the above-mentioned structure. As a preferred mode, the diameter of the third through hole 114 gradually increases along the direction of the oil suction through hole. For example, as shown in FIG. 9, the third through hole 114 is The tapered hole makes the oil flowing out from the straight hole 113 automatically flow towards the side close to the oil suction through hole 111 in a natural state, so as to be sucked into the oil suction chamber 81 together with the oil in the oil suction through hole 111 . To facilitate processing, the third through hole 114 can also be set as a through hole inclined relative to the axis of the base 11 . Preferably, as shown in FIG. 10 , the third through hole 114 is inclined in the direction of the oil suction through hole 111 .

Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

At the same time, it should be understood that example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those skilled in the art. Numerous specific details are given, such as examples of specific components, devices and methods, to provide a thorough understanding of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known device structures and well-known technologies are not described in detail.

When an element or layer is referred to as being "on," "bonded to," "connected to," or "coupled to" another element or layer, it can be directly on the other element or layer. or layer, be directly bonded, connected or coupled to another element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly coupled to" another element or layer When , there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a like fashion (eg, "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be referred to by these Terminology restrictions. These terms may be only used to distinguish one element, component, region, layer or section from another element, region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (14)

1. a compressor, comprise compressing mechanism, for the volume type rotor pump of the lubrication oil circulation loop fuel feeding to described compressor and for driving the live axle (3) of described compressing mechanism and described volume type rotor pump, described live axle (3) is arranged in supporting base (4) away from one end of described compressing mechanism through supplementary bearing (5) rotation, described supporting base (4), clearance space (7) is formed between described live axle (3) and described supplementary bearing (5), it is characterized in that: in described volume type rotor pump, be provided with connecting passage, described clearance space (7) accesses oil sucting cavity (81) and/or the suction passage of described volume type rotor pump by described connecting passage.

2. compressor according to claim 1, it is characterized in that: the rotor that described volume type rotor pump comprises an airtight receiving cavity (8) and is arranged in described receiving cavity (8), described oil sucting cavity (81) to be coordinated with the inwall of described receiving cavity (8) by described rotor and is formed, described live axle (3) is provided with the eccentric shaft (10) with the eccentric axis of described live axle (3), described eccentric shaft (10) is connected with described rotor, for driving described rotor while described live axle (3) does orbiting, rotate centered by described eccentric shaft (10),

Described connecting passage is arranged on the chamber wall of described receiving cavity (8).

3. compressor according to claim 2, it is characterized in that: described volume type rotor pump also comprises the base (11) be fixed on described supporting base (4) and the Oil pump cylinder (14) be fixedly installed in described base (11), described base (11) and described Oil pump cylinder (14) surround the receiving cavity (8) of one end open;

Also comprise sealed cover (15), the opening of described receiving cavity (8) seals by the one side of described sealed cover (15), end face and the described clearance space (7) of another side and described live axle (3) are oppositely arranged, described eccentric shaft (10) and described rotor is rotating is arranged on described sealed cover (15).

4. compressor according to claim 3, it is characterized in that: the upper position corresponding with described oil sucting cavity (81) of described sealed cover (15) is provided with at least one first through hole (151), and described first through hole (151) is communicated with described oil sucting cavity (81) and described clearance space (7).

5. compressor according to claim 4, it is characterized in that: the upper one side relative with described clearance space (7) of described sealed cover (15) is provided with manifold groove, for being confluxed by the lubricant oil in described clearance space (7) to described first through hole (151) place.

6. compressor according to claim 5, it is characterized in that: described manifold groove comprises annular groove (152) and is communicated with described annular groove (152) and the multiple radial grooves (153) radially outwards dispersed, and described first through hole (151) is positioned on described annular groove (152).

7. compressor according to claim 4, is characterized in that: be provided with the position structure matched between described sealed cover (15) with described base (11).

8. compressor according to claim 3, it is characterized in that: described base (11) has vertically at least one oil suction through hole (111), described oil suction through hole (111) connects the oil sump (6) of described compressor and described oil sucting cavity (81);

Described sealed cover (15) and described base (11) offer described connecting passage, and described connecting passage one end connects described clearance space (7), and the other end connects described oil suction through hole (111).

9. compressor according to claim 8, it is characterized in that: described connecting passage comprises the second through hole (154) be opened on described sealed cover (15), the third through-hole (114) that is arranged at the upper and straight hole (113) corresponding with described second through hole (154) position of described base (11) and is opened on described oil suction through hole (111) outer wall, and the sidewall of described third through-hole (114) is communicated with described straight hole (113).

10. compressor according to claim 9, is characterized in that: the aperture of described third through-hole (114) increases gradually along the direction to described oil suction through hole (111).

11. compressors according to claim 9, is characterized in that: the axis of the relatively described base (11) of described third through-hole (114) is obliquely installed.

12. compressors according to any one of claim 9 to 11, is characterized in that: described third through-hole (114) is provided with plug away from the end of described oil suction through hole (111).

13. compressors according to any one of claim 1 to 11, it is characterized in that: described live axle (3) is provided with along its axially extended main oil-hole (31), also be provided with supplementary bearing oilhole (32), described supplementary bearing oilhole (32) one end connects described main oil-hole (31), and the other end passes into described supplementary bearing (5) place.

14. compressors according to any one of claim 1 to 11, is characterized in that: described volume type rotor pump is gear pump.