阅读说明：本技术 一种轴向力气动平衡装置及测功机装置 (Axial force pneumatic balancing device and dynamometer device ) 是由 唐智 魏鹏程 刘菊兰 陈楠 于 2019-10-14 设计创作，主要内容包括：本发明提供了一种气动平衡轴向力的测功机装置,包括测功机、涡轮箱和轴向力气动平衡装置,轴向力气动平衡装置包括气室壳和气活塞,所述气室壳内设有圆柱形的气室,气室的左右两端有孔；气室内设置所述气活塞,所述气活塞为中心对称回转体结构,径向设有凸起的圆盘,所述气活塞可以在所述气室内左右移动；所述气室壳上安装与气室连通的右气管和左气管,所述左气管和右气管分别位于所述气活塞的左右两侧,所述右气管的端部安装有右喷嘴,所述右喷嘴的开口方向正对所述气活塞凸起的圆盘。本发明解决了涡轮连接高速测功机进行试验时的轴向力平衡问题,不仅可以比较准确地测得涡轮功率,而且不会对测功机转子造成损害,起到保护高速测功机的目的。(The invention provides a dynamometer device for pneumatically balancing axial force, which comprises a dynamometer, a turbine box and an axial force pneumatic balancing device, wherein the axial force pneumatic balancing device comprises an air chamber shell and an air piston, a cylindrical air chamber is arranged in the air chamber shell, and the left end and the right end of the air chamber are provided with holes; the air piston is arranged in the air chamber, is of a centrosymmetric revolving body structure and is radially provided with a convex disk, and can move left and right in the air chamber; the air chamber shell is provided with a right air pipe and a left air pipe which are communicated with the air chamber, the left air pipe and the right air pipe are respectively positioned on the left side and the right side of the air piston, the end part of the right air pipe is provided with a right nozzle, and the opening direction of the right nozzle is right opposite to the disc which is convex to the air piston. The invention solves the problem of axial force balance when the turbine is connected with the high-speed dynamometer for testing, not only can accurately measure the power of the turbine, but also can not damage the rotor of the dynamometer, thereby achieving the purpose of protecting the high-speed dynamometer.)

1. An axial force pneumatic balancing device, characterized by comprising: the air chamber comprises an air chamber shell (13) and an air piston (14), wherein an air chamber (11) is arranged in the air chamber shell (13), the air piston (14) is arranged in the air chamber (11), the air piston (14) is of a centrosymmetric rotary structure and is radially provided with a convex disc, and the air piston (14) can move left and right in the air chamber (11);

air chamber shell (13) are gone up right trachea (15) and left trachea (151) of installation and air chamber (11) intercommunication, left side trachea (151) and right trachea (15) are located respectively the left and right sides of air piston (14), right nozzle (152) are installed to the tip of right trachea (15), the opening direction of right nozzle (152) is just right air piston (14) bellied disc.

2. The axial force pneumatic balancing device of claim 1, wherein: the end part of the left air pipe (151) is provided with a left nozzle (153), and the opening direction of the left nozzle (153) is over against the convex disc of the air piston (14).

3. An axial force pneumatic balancing device according to claim (1), characterized in that: one end of the air piston (9) extends out of the air chamber (11).

4. A dynamometer device for pneumatically balancing axial force, characterized in that: comprises a dynamometer bracket (1), a dynamometer (2), a dynamometer rotor connector (3), a flexible shaft (6), a bearing body (16), a turbine box, the flexible shaft (6), a turbine rotor connector (8), a displacement sensor (10), a shaft (24) and an axial force pneumatic balancing device as described in claim 1 or 2,

the dynamometer (2) and the bearing body (16) are respectively and fixedly installed at the left end and the right end of the dynamometer support (1), and the right end of the bearing body (16) is connected with a turbine box; the bearing body (16) is a revolving body structure, and the displacement sensor (10) and the axial force pneumatic balancing device are arranged in an inner hole of a rotating center of the bearing body;

the shaft (24) is mounted in an inner hole of the bearing body (16) through a bearing, the left end and the right end of the shaft (24) are respectively connected with the air piston (14) and the turbine (25) in the turbine box, and the left end of the air piston (14) is connected with the turbine rotor connector (8); a dynamometer rotor connector (3) is arranged at the right end of the rotor of the dynamometer (2), and the right end of the dynamometer rotor connector (3) is connected with the turbine rotor connector (8) through the flexible shaft (6);

the displacement sensor (10) is of a hollow structure and is sleeved on the turbine rotor connector (8), and a gap is reserved between the displacement sensor (10) and the turbine rotor connector (8); or the left end of the air piston (9) extends out of an air chamber (11) and is positioned in the hole of the displacement sensor (5).

5. The dynamometer device of claim 4, wherein: the left end and the right end of the torque sensor (241) are respectively connected with the right end of the air piston (14) and the shaft (24); alternatively, the torque sensor (241) has left and right ends connected to the shaft (24) and the turbine (25), respectively.

6. The dynamometer device of claim 4, wherein: the flexible shaft (6) is of a hollow tubular structure, and the left end and the right end of the flexible shaft are respectively provided with a flexible shaft dynamometer end spline hole (4) and a flexible shaft turbine end spline hole (9); and a rotor connector (3) at the right end of the rotor of the dynamometer (2) is inserted into a spline hole (4) at the dynamometer end of the flexible shaft, and a turbine rotor connector (8) is inserted into a spline hole (9) at the turbine end of the flexible shaft.

7. The dynamometer device of claim 4, wherein: the dynamometer support (1) is provided with a dynamometer support hole (7), and the dynamometer (2) and the bearing body (16) are respectively installed at the left end and the right end of the dynamometer support hole (7); a stepped hole (17) is formed in the rotation center of the bearing body (16), a bearing body left flange (12) and a bearing body right flange (21) are respectively arranged at two ends of the bearing body (16), and the bearing body left flange (12) is connected with the dynamometer support (1) through a bearing body left flange screw (5); the bearing body right flange (21) is connected with the turbine box left shell (19) through a bearing body right flange screw (22); the axial force pneumatic balancing device and the displacement sensor (10) are arranged in a left hole of the stepped hole (17); the turbine box left shell (19) and the turbine box right shell (26) are connected through a turbine box bolt (20) to form a turbine box; a left bearing (18) and a right bearing (23) are arranged in a hole at the right end of the bearing body (16), and a shaft (24) penetrates through holes of the left bearing (18) and the right bearing (23).

8. The dynamometer apparatus for pneumatically balancing axial forces according to claim 4, wherein during testing:

maintaining the air piston (14) at an initial position by controlling the pressure and flow rate of the compressed air entering the right air pipe (15) according to the detected position signal of the displacement sensor (10); alternatively, the air piston (9) is maintained at an initial position by controlling the pressure and flow rate of compressed air entering the left air pipe (151) and the right air pipe (15), respectively.

Technical Field

The invention belongs to the technical field of electromechanics, and particularly relates to an axial force pneumatic balancing device and a dynamometer device.

Background

The high-speed dynamometer can be used for carrying out a turbine dynamometer test, when a turbine is directly connected with the high-speed dynamometer test, the problem of axial force balance of the turbine needs to be solved, a thrust bearing is added on a turbine shaft in a conventional measure, but the friction power consumption of a turbine bearing system is increased due to the measure, so that the measured turbine power is inaccurate; and if the thrust structure is not added during the turbine test, the axial force of the turbine can cause damage to the dynamometer rotor.

Disclosure of Invention

In view of the above, the present invention is directed to an axial force pneumatic balancing device and a dynamometer device, so as to solve the problem of axial force balance when a turbine is connected to a high-speed dynamometer for testing.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides an axial force pneumatic balancing device in one aspect, which comprises: the air chamber shell is internally provided with a cylindrical air chamber, and the left end and the right end of the air chamber are provided with holes; the air piston is arranged in the air chamber, is of a centrosymmetric revolving body structure and is radially provided with a convex disk, and can move left and right in the air chamber; the air chamber shell is provided with a right air pipe and a left air pipe which are communicated with the air chamber, the left air pipe and the right air pipe are respectively positioned on the left side and the right side of the air piston, the end part of the right air pipe is provided with a right nozzle, and the opening direction of the right nozzle is right opposite to the disc which is convex to the air piston.

Preferably, the end part of the left air pipe is provided with a left nozzle, and the opening direction of the left nozzle is opposite to the circular disc protruding from the air piston.

Preferably, one end of the air piston extends out of the air chamber.

Compared with the prior art, the axial force pneumatic balancing device has the following advantages:

when the device is applied, the left device and the right device are connected through the air piston, and the air piston is controlled to be kept at the initial position, so that the transmission of axial force generated by the turbine to the dynamometer is eliminated.

The invention provides a dynamometer device for pneumatically balancing axial force, which comprises a dynamometer bracket, a dynamometer rotor connector, a flexible shaft, a bearing body, a turbine box, a flexible shaft, a turbine rotor connector, a displacement sensor, a shaft and the axial force pneumatic balancing device,

the dynamometer and the bearing body are respectively and fixedly installed at the left end and the right end of the dynamometer support, and the right end of the bearing body is connected with the turbine box; the bearing body is of a revolving body structure, and the displacement sensor and the axial force pneumatic balancing device are arranged in an inner hole of a rotating center of the bearing body;

the shaft is arranged in an inner hole of the bearing body through a bearing, the left end and the right end of the shaft are respectively connected with an air piston and a turbine in the turbine box, and the left end of the air piston is connected with a turbine rotor connector; the right end of the dynamometer rotor is provided with a dynamometer rotor connector, and the right end of the dynamometer rotor connector is connected with the turbine rotor connector through the flexible shaft;

the displacement sensor is of a hollow structure and is sleeved on the turbine rotor connector, and a gap is reserved between the displacement sensor and the turbine rotor connector; or the left end of the air piston extends out of the air chamber and is positioned in the hole of the displacement sensor.

The left end and the right end of the torque sensor are respectively connected with the right end of the air piston and the shaft; or the left end and the right end of the torque sensor are respectively connected with the shaft and the turbine.

Furthermore, the flexible shaft is of a hollow tubular structure, and the left end and the right end of the flexible shaft are respectively provided with a spline hole at the end of the flexible shaft dynamometer and a spline hole at the turbine end of the flexible shaft; and a rotor connector at the right end of the rotor of the dynamometer is inserted into the spline hole at the end of the flexible shaft dynamometer, and a turbine rotor connector is inserted into the spline hole at the turbine end of the flexible shaft.

Further, the dynamometer support is provided with a dynamometer support hole, and the dynamometer and the bearing body are respectively installed at the left end and the right end of the dynamometer support hole; the center of rotation of the bearing body is provided with a stepped hole, two ends of the bearing body are respectively provided with a bearing body left flange and a bearing body right flange, and the bearing body left flange is connected with the dynamometer support through a bearing body left flange screw; the bearing body right flange is connected with the turbine box left shell through a bearing body right flange screw; the axial force pneumatic balancing device and the displacement sensor are arranged in the left side hole of the stepped hole; the turbine box left shell and the turbine box right shell are connected through a turbine box bolt to form a turbine box; a left bearing and a right bearing are arranged in a hole at the right end of the bearing body, and a shaft penetrates through holes of the left bearing and the right bearing.

The dynamometer device for pneumatically balancing axial force has the advantages that:

the dynamometer device for pneumatically balancing the axial force is kept at an initial position by controlling the air piston, so that the transmission of the axial force generated by the turbine to the dynamometer is eliminated; the power value measured by the high-speed dynamometer can be verified through the measured rotor rotating speed and torque value, the problem of axial force balance when the turbine is connected with the high-speed dynamometer for testing is solved, the turbine power can be accurately measured, the dynamometer rotor cannot be damaged, and the purpose of protecting the high-speed dynamometer is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a cross-sectional view of a dynamometer apparatus for pneumatically balancing axial forces in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a dynamometer apparatus for pneumatically balancing axial forces in accordance with another embodiment of the present disclosure;

fig. 3 is a schematic view of an axial force pneumatic balancing device according to another embodiment of the present invention.

Description of reference numerals:

1-dynamometer support, 2-dynamometer, 3-dynamometer rotor connector, 4-flexible shaft dynamometer machine end spline hole, 5-bearing body left flange screw, 6-flexible shaft, 7-dynamometer support hole, 8-turbine rotor connector, 9-flexible shaft turbine end spline hole, 10-displacement sensor, 11-air chamber, 12-bearing body left flange, 13-air chamber shell, 14-air piston, 15-right air pipe, 151-left air pipe, 152-right nozzle, 153-left nozzle, 16-bearing body, 17-stepped hole, 18-left bearing, 19-turbine box left shell, 20-turbine box bolt, 21-bearing body right flange, 22-bearing body right flange screw, 23-right bearing, 24-shaft, 241-torque sensor, 25-turbine, 26-turbine box right housing.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in FIGS. 1 to 3, a cross-sectional view of a dynamometer device for pneumatically balancing axial force comprises a dynamometer support 1, a dynamometer 2, a dynamometer rotor connector 3, a flexible shaft 6, a bearing body 16, a turbine box, a flexible shaft 6, a turbine rotor connector 8, a displacement sensor 10, a shaft 24 and an axial force pneumatic balancing device,

the axial force pneumatic balancing device comprises an air chamber shell 13 and an air piston 14, wherein an air chamber 11 is arranged in the air chamber shell 13, the air chamber 11 is of a hollow structure and internally provided with the air piston 14, the air piston 14 is of a centrosymmetric revolving body structure and is radially provided with a convex disc, and the air piston 14 can move left and right in the air chamber 11; the air chamber shell 13 is provided with a right air pipe 15 and a left air pipe 151 which are communicated with the air chamber 11, the left air pipe 151 and the right air pipe 15 are respectively positioned at the left side and the right side of the air piston 14, the end part of the right air pipe 15 is provided with a right nozzle 152, the right nozzle 152 is horizontally arranged, and the opening direction of the right nozzle is opposite to a convex disc of the air piston 14; compressed air may be injected through the right air tube 15 and the right nozzle 152 onto the convex disk of the air piston 14.

The end of the left air tube 151 of another preferred embodiment is provided with a left nozzle 153, and the opening direction of the left nozzle 153 is opposite to the convex disk of the air piston 14.

The dynamometer 2 and the bearing body 16 are respectively and fixedly installed at the left end and the right end of the dynamometer support 1, and the right end of the bearing body 16 is connected with a turbine box; the bearing body 16 is a revolving body structure, and the displacement sensor 10 and the axial force pneumatic balancing device are arranged in an inner hole of a rotating center of the bearing body;

the shaft 24 is mounted in an inner hole of the bearing body 16 through a bearing, the left end and the right end of the shaft 24 are respectively connected with the air piston 14 and a turbine 25 in the turbine box, and the left end of the air piston 14 is connected with the turbine rotor connector 8; a dynamometer rotor connector 3 is arranged at the right end of the rotor of the dynamometer 2, and the right end of the dynamometer rotor connector 3 is connected with a turbine rotor connector 8 through the flexible shaft 6;

the displacement sensor 10 is of a hollow structure, the displacement sensor 10 according to one embodiment of the invention is sleeved on the turbine rotor connector 8, and a gap is formed between the displacement sensor 10 and the turbine rotor connector 8;

the left end of the air piston 9 of another embodiment extends out of the air chamber 11 and is located in the hole of the displacement sensor 5, as shown in fig. 3.

The present invention further includes a torque sensor 241, and the left and right ends of the torque sensor 241 according to an embodiment of the present invention are respectively connected to the right end of the air piston 14 and the shaft 24, as shown in fig. 1. The torque sensor 241 according to another embodiment of the present invention has left and right ends respectively connected to the shaft 24 and the turbine 25, as shown in fig. 2. The power value measured by the high-speed dynamometer can be verified through the rotor rotating speed and the torque value measured by the torque sensor 17.

The flexible shaft 6 is of a hollow tubular structure, and the left end and the right end of the flexible shaft are respectively provided with a flexible shaft dynamometer end splined hole 4 and a flexible shaft turbine end splined hole 9; and a rotor connector 3 at the right end of the rotor of the dynamometer 2 is inserted into a spline hole 4 at the dynamometer end of the flexible shaft, and a turbine rotor connector 8 is inserted into a spline hole 9 at the turbine end of the flexible shaft.

The dynamometer support 1 is provided with a dynamometer support hole 7, and the dynamometer 2 and the bearing body 16 are respectively installed at the left end and the right end of the dynamometer support hole 7;

a stepped hole 17 is formed in the rotation center of the bearing body 16, a bearing body left flange 12 and a bearing body right flange 21 are respectively arranged at two ends of the bearing body 16, and the bearing body left flange 12 is connected with the dynamometer support 1 through a bearing body left flange screw 5; the bearing body right flange 21 is connected with the turbine box left shell 19 through a bearing body right flange screw 22; the electromagnetic valve shell 13 and the displacement sensor 10 are arranged in a left hole of the stepped hole 17;

the turbine box left shell 19 and the turbine box right shell 26 are connected through a turbine box bolt 20 to form a turbine box; a left bearing 18 and a right bearing 23 are arranged in a hole at the right end of the bearing body 16, and a shaft 24 passes through the holes of the left bearing 18 and the right bearing 23.

The center of the dynamometer support hole 7, the dynamometer rotor connector 3, the turbine rotor connector 8, the flexible shaft dynamometer end spline hole 4, the flexible shaft turbine end spline hole 9, the flexible shaft 6, the air piston 14, the left bearing 18, the right bearing 23, the shaft 24 and the turbine 25 are coaxial.

During the test, according to the detected position signal of the displacement sensor 10, the pressure and the flow of the compressed air entering the right air pipe 15 are controlled to control the air piston 14 to be kept at the initial position, and the transmission of the axial force generated by the turbine 25 to the direction of the dynamometer 2 is prevented; the power value measured by the high-speed dynamometer can be verified through the rotor speed and the torque value measured by the torque sensor 241.

Or the air piston 9 is maintained at an initial position by controlling the pressure and flow rate of the compressed air introduced into the left air tube 151 and the right air tube 15, respectively.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.